Provide access to the list delimiter (#275)

* Provide access to the list delimiter

* Fix test

.github/workflows/swiftlint.yml

@@ -0,0 +1,17 @@
+name: SwiftLint
+
+on:
+  pull_request:
+    paths:
+      - '.github/workflows/swiftlint.yml'
+      - '.swiftlint.yml'
+      - '**/*.swift'
+
+jobs:
+  SwiftLint:
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v1
+        - name: GitHub Action for SwiftLint
+          uses: norio-nomura/action-swiftlint@3.2.1
+

.gitignore

@@ -1,9 +1,9 @@
 Pods/
+.build/
 .DS_Store
 xcuserdata
 
 # additional ignores that will save us time
-build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3

.slather.yml

@@ -1,5 +0,0 @@
-coverage_service: coveralls
-xcodeproj: Down.xcodeproj
-source_directory: Source
-ignore: 
-  - Source/cmark/*

.swift-version

@@ -1 +0,0 @@
-4.0

.swiftlint.yml

@@ -0,0 +1,10 @@
+included:
+  - Sources/Down
+  - Tests
+
+large_tuple:
+  warning: 3
+  error: 4
+
+cyclomatic_complexity:
+  ignores_case_statements: true

.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:">
+   </FileRef>
+</Workspace>

.travis.yml

@@ -1,12 +1,12 @@
-osx_image: xcode10.1
+osx_image: xcode12.2
 language: objective-c
 before_install:
   - set -o pipefail
-  - gem install xcpretty slather -N
-  - xcrun simctl boot "iPhone 7" || echo "(Pre)Launched the simulator."
+  - xcrun simctl boot "iPhone 12" || echo "(Pre)Launched the simulator."
 script:
-  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -destination "platform=iOS Simulator,name=iPhone 7" -enableCodeCoverage YES ONLY_ACTIVE_ARCH=YES test | xcpretty -c
-  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk macosx -destination 'platform=OS X,arch=x86_64' -enableCodeCoverage YES test | xcpretty -c
-  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk appletvsimulator -destination 'platform=tvOS Simulator,name=Apple TV' -enableCodeCoverage YES test | xcpretty -c
-after_success:
-  - slather coverage --ignore "../**/*/Xcode*" --ignore "Source/cmark/*" --scheme "Down" Down.xcodeproj
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk iphonesimulator -destination "platform=iOS Simulator,OS=14.2,name=iPhone 12" -enableCodeCoverage YES ONLY_ACTIVE_ARCH=YES -quiet test
+  - bash <(curl -s https://codecov.io/bash)
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk macosx -destination 'platform=OS X,arch=x86_64' -enableCodeCoverage YES -quiet test
+  - bash <(curl -s https://codecov.io/bash) 
+  - travis_retry xcodebuild -project Down.xcodeproj -scheme "Down" -sdk appletvsimulator -destination 'platform=tvOS Simulator,name=Apple TV' -enableCodeCoverage YES -quiet test
+  - bash <(curl -s https://codecov.io/bash)

CHANGELOG.md

@@ -1,263 +1,611 @@
-# Change Log
+# Changelog
 
-## [v0.6.1](https://github.com/iwasrobbed/Down/tree/v0.6.1) (2018-11-23)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.6.0...v0.6.1)
+## [v0.11.0](https://github.com/johnxnguyen/Down/tree/v0.11.0) (2021-05-04)
 
-**Closed issues:**
-
-- 2 Swift Compiler Errors when installing Down on iOS [\#117](https://github.com/iwasrobbed/Down/issues/117)
-- How to update to the latest version of the cmark library [\#115](https://github.com/iwasrobbed/Down/issues/115)
-
-**Merged pull requests:**
-
-- \[travis\] Update to retry [\#114](https://github.com/iwasrobbed/Down/pull/114) ([iwasrobbed](https://github.com/iwasrobbed))
-- Fix macOS Platform, Custom URL Scheme Handler, Polish Demos. [\#110](https://github.com/iwasrobbed/Down/pull/110) ([chriszielinski](https://github.com/chriszielinski))
-
-## [v0.6.0](https://github.com/iwasrobbed/Down/tree/v0.6.0) (2018-11-10)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.5.3...v0.6.0)
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.10.0...v0.11.0)
 
 **Implemented enhancements:**
 
-- \[iOS 10+\] Warnings for WebKit signal service and latex.c [\#94](https://github.com/iwasrobbed/Down/issues/94)
-- Update cmark version to latest stable release [\#84](https://github.com/iwasrobbed/Down/issues/84)
+- \[CodeCoverage\] Improve accuracy for combined code coverage reporting [\#205](https://github.com/johnxnguyen/Down/issues/205)
 
 **Closed issues:**
 
-- HTML to Markdowndow? [\#107](https://github.com/iwasrobbed/Down/issues/107)
-- Blockquote does not work in NSAttributedString [\#106](https://github.com/iwasrobbed/Down/issues/106)
-- Support for Dynamic Type [\#90](https://github.com/iwasrobbed/Down/issues/90)
+- DownStyler not included when installed via CocoaPods [\#254](https://github.com/johnxnguyen/Down/issues/254)
+- \[Commonmark\] Strikethrough not working / not supported [\#253](https://github.com/johnxnguyen/Down/issues/253)
+- \[Attributed Strings\] Unordered list items with a single line appear further indented than those with multiple lines when using a custom font [\#246](https://github.com/johnxnguyen/Down/issues/246)
 
 **Merged pull requests:**
 
-- \[Down\] Bump to v0.6.0 [\#113](https://github.com/iwasrobbed/Down/pull/113) ([iwasrobbed](https://github.com/iwasrobbed))
-- \[cmark\] Update lib to v0.28.3 [\#112](https://github.com/iwasrobbed/Down/pull/112) ([phoney](https://github.com/phoney))
-- Update project to Xcode 10 [\#109](https://github.com/iwasrobbed/Down/pull/109) ([funkyboy](https://github.com/funkyboy))
+- \[Feature\] Custom list prefixes for AttributedStringVisitor [\#255](https://github.com/johnxnguyen/Down/pull/255) ([dloic](https://github.com/dloic))
+- \[Chore\] Add SwiftLint [\#252](https://github.com/johnxnguyen/Down/pull/252) ([johnxnguyen](https://github.com/johnxnguyen))
+- \[Chore\] Fix codecov report [\#251](https://github.com/johnxnguyen/Down/pull/251) ([johnxnguyen](https://github.com/johnxnguyen))
 
-## [v0.5.3](https://github.com/iwasrobbed/Down/tree/v0.5.3) (2018-09-19)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.5.2...v0.5.3)
+## [v0.10.0](https://github.com/johnxnguyen/Down/tree/v0.10.0) (2021-02-28)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.9.5...v0.10.0)
+
+**Closed issues:**
+
+- Does not build in 12.5 [\#244](https://github.com/johnxnguyen/Down/issues/244)
+- \[Crash\] Missing resource bundle when using SPM [\#243](https://github.com/johnxnguyen/Down/issues/243)
+
+**Merged pull requests:**
+
+- \[Improvement\] Expose DownTextView's designated initializer [\#250](https://github.com/johnxnguyen/Down/pull/250) ([max-potapov](https://github.com/max-potapov))
+- \[Chore\] Add arm64 as valid arch when building for simulator on M1 macs [\#249](https://github.com/johnxnguyen/Down/pull/249) ([michaelknoch](https://github.com/michaelknoch))
+- \[Chore\] Reorganize project structure for SPM [\#248](https://github.com/johnxnguyen/Down/pull/248) ([johnxnguyen](https://github.com/johnxnguyen))
+- \[Chore\] Use SPM to manage snapshot testing dependency [\#247](https://github.com/johnxnguyen/Down/pull/247) ([johnxnguyen](https://github.com/johnxnguyen))
+
+## [v0.9.5](https://github.com/johnxnguyen/Down/tree/v0.9.5) (2021-02-12)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.9.4...v0.9.5)
+
+**Closed issues:**
+
+- Namespacing issues with Down "Node" type [\#242](https://github.com/johnxnguyen/Down/issues/242)
+- GitHub actions build failure: `small method list` [\#238](https://github.com/johnxnguyen/Down/issues/238)
+
+**Merged pull requests:**
+
+- \[Fix\] Compilation failure with Xcode 12.5 and SPM [\#245](https://github.com/johnxnguyen/Down/pull/245) ([claurel](https://github.com/claurel))
+- \[Chore\] Update readme [\#237](https://github.com/johnxnguyen/Down/pull/237) ([johnxnguyen](https://github.com/johnxnguyen))
+
+## [v0.9.4](https://github.com/johnxnguyen/Down/tree/v0.9.4) (2020-10-21)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.9.3...v0.9.4)
 
 **Implemented enhancements:**
 
-- ” not being rendered [\#95](https://github.com/iwasrobbed/Down/issues/95)
-- Update issue templates [\#101](https://github.com/iwasrobbed/Down/pull/101) ([iwasrobbed](https://github.com/iwasrobbed))
+- Create custom sequence to access child nodes [\#228](https://github.com/johnxnguyen/Down/pull/228) ([5sw](https://github.com/5sw))
+
+**Closed issues:**
+
+- DownStylerConfiguration Link Color Not Working [\#232](https://github.com/johnxnguyen/Down/issues/232)
+- SwiftUI support [\#231](https://github.com/johnxnguyen/Down/issues/231)
+- How to pre-calculate height needed for attributed string when using DownLayoutManager [\#226](https://github.com/johnxnguyen/Down/issues/226)
+- How i can render both markdown and Latex  ? [\#221](https://github.com/johnxnguyen/Down/issues/221)
+- Emphasis + Strong [\#220](https://github.com/johnxnguyen/Down/issues/220)
+- \[StackOverflow\] Creating a new Visitor leads to wrapping value error [\#218](https://github.com/johnxnguyen/Down/issues/218)
+- 0.9.0/0.9.1 don't build with Swift 5.0.x [\#217](https://github.com/johnxnguyen/Down/issues/217)
+- Unable to build Swift package in Xcode 11.4.1 [\#209](https://github.com/johnxnguyen/Down/issues/209)
+- \[Feature\] Add support for Mac Catalyst [\#208](https://github.com/johnxnguyen/Down/issues/208)
+
+**Merged pull requests:**
+
+- \[Fix\] DownTextView renders incorrect link color [\#233](https://github.com/johnxnguyen/Down/pull/233) ([johnxnguyen](https://github.com/johnxnguyen))
+- Added instructions for using the Swift Package Manager [\#230](https://github.com/johnxnguyen/Down/pull/230) ([klm1](https://github.com/klm1))
+- Use case let as instead of case is and force casting later. [\#227](https://github.com/johnxnguyen/Down/pull/227) ([5sw](https://github.com/5sw))
+- Add macOS arm64 platform [\#224](https://github.com/johnxnguyen/Down/pull/224) ([jasminlapalme](https://github.com/jasminlapalme))
+
+## [v0.9.3](https://github.com/johnxnguyen/Down/tree/v0.9.3) (2020-06-12)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.9.2...v0.9.3)
+
+**Closed issues:**
+
+- Line breaks between list items are not parsed correctly [\#214](https://github.com/johnxnguyen/Down/issues/214)
+- Can't build with copied sources [\#211](https://github.com/johnxnguyen/Down/issues/211)
+- hard blank line insertion after list [\#210](https://github.com/johnxnguyen/Down/issues/210)
+- Cocoapod version 0.9.2 not available. [\#206](https://github.com/johnxnguyen/Down/issues/206)
+- \[Feature\] Local images not accessible from WKWebView [\#198](https://github.com/johnxnguyen/Down/issues/198)
+
+**Merged pull requests:**
+
+- \[Chore\] Bump swift snapshot testing to 1.7.2 [\#216](https://github.com/johnxnguyen/Down/pull/216) ([johnxnguyen](https://github.com/johnxnguyen))
+- Add tightness property to List node [\#215](https://github.com/johnxnguyen/Down/pull/215) ([johnxnguyen](https://github.com/johnxnguyen))
+- Add styling options for level 4 to 6 headings [\#207](https://github.com/johnxnguyen/Down/pull/207) ([mathebox](https://github.com/mathebox))
+- \[DownView\] Add parameter so bundle is writable [\#200](https://github.com/johnxnguyen/Down/pull/200) ([brunnobga](https://github.com/brunnobga))
+
+## [v0.9.2](https://github.com/johnxnguyen/Down/tree/v0.9.2) (2020-03-03)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.9.1...v0.9.2)
+
+**Closed issues:**
+
+- Update Framework with Swift 5.1 [\#178](https://github.com/johnxnguyen/Down/issues/178)
+
+**Merged pull requests:**
+
+- Swift 5.1 Support [\#204](https://github.com/johnxnguyen/Down/pull/204) ([ghost](https://github.com/ghost))
+- Resolves Swift Package Manager issue related to swift-snapshot-testing [\#203](https://github.com/johnxnguyen/Down/pull/203) ([ghost](https://github.com/ghost))
+
+## [v0.9.1](https://github.com/johnxnguyen/Down/tree/v0.9.1) (2020-02-28)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.9.0...v0.9.1)
+
+**Implemented enhancements:**
+
+- Added Linux support. [\#172](https://github.com/johnxnguyen/Down/pull/172) ([vgorloff](https://github.com/vgorloff))
+
+**Closed issues:**
+
+- SwiftPM : Resolve apparent version incompatibility with swift-snapshot-testing [\#202](https://github.com/johnxnguyen/Down/issues/202)
+- Release fixes made after 0.9.0 [\#201](https://github.com/johnxnguyen/Down/issues/201)
+- Swift UI Support [\#199](https://github.com/johnxnguyen/Down/issues/199)
+- 'BaseNode' initializer is inaccessible due to 'internal' protection level [\#196](https://github.com/johnxnguyen/Down/issues/196)
+- Any emoji support? [\#195](https://github.com/johnxnguyen/Down/issues/195)
+- Swift Packege maneger? [\#194](https://github.com/johnxnguyen/Down/issues/194)
+- Regression: single newline syntax not working \(any variety\) [\#191](https://github.com/johnxnguyen/Down/issues/191)
+- Down cannot convert this markdown string to html [\#190](https://github.com/johnxnguyen/Down/issues/190)
+- App using xcframework with Down pod dependency causes crash [\#187](https://github.com/johnxnguyen/Down/issues/187)
+- Is the text supposed to be rendering this large? [\#186](https://github.com/johnxnguyen/Down/issues/186)
+- Issue with markdown render/convert to attribute string on macOS latest version [\#185](https://github.com/johnxnguyen/Down/issues/185)
+- Table are not render [\#183](https://github.com/johnxnguyen/Down/issues/183)
+- How to change text color? [\#182](https://github.com/johnxnguyen/Down/issues/182)
+- incorrect parse for string that is a mixture of markdown and html [\#180](https://github.com/johnxnguyen/Down/issues/180)
+
+**Merged pull requests:**
+
+- Improve configurability of DownStyler [\#188](https://github.com/johnxnguyen/Down/pull/188) ([mgacy](https://github.com/mgacy))
+- Make color & font collection initializers public [\#184](https://github.com/johnxnguyen/Down/pull/184) ([johnxnguyen](https://github.com/johnxnguyen))
+
+## [v0.9.0](https://github.com/johnxnguyen/Down/tree/v0.9.0) (2019-10-06)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.6...v0.9.0)
+
+**Closed issues:**
+
+- Please add Styler example in the documentation [\#179](https://github.com/johnxnguyen/Down/issues/179)
+- \[Attributed Strings\] Can the `Styler` know which list item marker was parsed? [\#176](https://github.com/johnxnguyen/Down/issues/176)
+- Error: 'cmark\_export.h' file not found with \<angled\> include; use "quotes" instead [\#175](https://github.com/johnxnguyen/Down/issues/175)
+- GIFF Support [\#174](https://github.com/johnxnguyen/Down/issues/174)
+- Help: Set Default Font [\#168](https://github.com/johnxnguyen/Down/issues/168)
+- \[Testing\] Adding a snapshot testing framework [\#165](https://github.com/johnxnguyen/Down/issues/165)
+- Adding a snapshot test framework [\#164](https://github.com/johnxnguyen/Down/issues/164)
+- XCode Beta 4 Build Error [\#162](https://github.com/johnxnguyen/Down/issues/162)
+- \[Attributed Strings\] Create default `Styler` for attributed string rendering [\#138](https://github.com/johnxnguyen/Down/issues/138)
+- \[Help out\] Collaborators wanted! Help us improve Down [\#105](https://github.com/johnxnguyen/Down/issues/105)
+- \[DownView\] Support for internal links? [\#93](https://github.com/johnxnguyen/Down/issues/93)
+
+**Merged pull requests:**
+
+- \[Feature\] Create default `Styler` for attributed string rendering [\#177](https://github.com/johnxnguyen/Down/pull/177) ([johnxnguyen](https://github.com/johnxnguyen))
+- Resolve xcode11beta4 issue. [\#170](https://github.com/johnxnguyen/Down/pull/170) ([ykphuah](https://github.com/ykphuah))
+- Minor documentation fix [\#169](https://github.com/johnxnguyen/Down/pull/169) ([nighthawk](https://github.com/nighthawk))
+
+## [v0.8.6](https://github.com/johnxnguyen/Down/tree/v0.8.6) (2019-07-11)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.5...v0.8.6)
+
+**Closed issues:**
+
+- Update Options to support Unsafe Rendering [\#159](https://github.com/johnxnguyen/Down/issues/159)
+- .toAttributedString stylesheet parameter [\#158](https://github.com/johnxnguyen/Down/issues/158)
+
+**Merged pull requests:**
+
+- Updates for unsafe option [\#160](https://github.com/johnxnguyen/Down/pull/160) ([hbowie](https://github.com/hbowie))
+- Fix permissions error on Catalina beta 2 [\#156](https://github.com/johnxnguyen/Down/pull/156) ([mdiep](https://github.com/mdiep))
+
+## [v0.8.5](https://github.com/johnxnguyen/Down/tree/v0.8.5) (2019-06-13)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.4...v0.8.5)
+
+**Closed issues:**
+
+- DebugVisitor is missing a public initializer [\#152](https://github.com/johnxnguyen/Down/issues/152)
+- Can't build with Swift 5.1 with SwiftPM [\#151](https://github.com/johnxnguyen/Down/issues/151)
+
+**Merged pull requests:**
+
+- \[SPM\] Fixes error with missing headers [\#154](https://github.com/johnxnguyen/Down/pull/154) ([aasimk2000](https://github.com/aasimk2000))
+- Create Public Initializer for DebugVisitor [\#153](https://github.com/johnxnguyen/Down/pull/153) ([mfcollins3](https://github.com/mfcollins3))
+
+## [v0.8.4](https://github.com/johnxnguyen/Down/tree/v0.8.4) (2019-06-04)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.3...v0.8.4)
+
+**Closed issues:**
+
+- \[Carthage\] Missing required module 'libcmark' [\#120](https://github.com/johnxnguyen/Down/issues/120)
+
+**Merged pull requests:**
+
+- Add Swift Package Manager support [\#150](https://github.com/johnxnguyen/Down/pull/150) ([aasimk2000](https://github.com/aasimk2000))
+- \[AST\] Replace line separator with paragraph separator. [\#149](https://github.com/johnxnguyen/Down/pull/149) ([fgulan](https://github.com/fgulan))
+
+## [v0.8.3](https://github.com/johnxnguyen/Down/tree/v0.8.3) (2019-05-15)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.2...v0.8.3)
+
+**Closed issues:**
+
+- Pass DownOptions to DownView [\#147](https://github.com/johnxnguyen/Down/issues/147)
+
+**Merged pull requests:**
+
+- Feature - pass DownOptions to init and update [\#148](https://github.com/johnxnguyen/Down/pull/148) ([ladislas](https://github.com/ladislas))
+
+## [v0.8.2](https://github.com/johnxnguyen/Down/tree/v0.8.2) (2019-05-10)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.1...v0.8.2)
+
+**Merged pull requests:**
+
+- Mark as safe for app extension use. [\#146](https://github.com/johnxnguyen/Down/pull/146) ([sgoodwin](https://github.com/sgoodwin))
+
+## [v0.8.1](https://github.com/johnxnguyen/Down/tree/v0.8.1) (2019-04-26)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.8.0...v0.8.1)
+
+**Merged pull requests:**
+
+- \[Swift\] Update to Swift 5.0 [\#145](https://github.com/johnxnguyen/Down/pull/145) ([iwasrobbed](https://github.com/iwasrobbed))
+
+## [v0.8.0](https://github.com/johnxnguyen/Down/tree/v0.8.0) (2019-04-24)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.7.0...v0.8.0)
+
+**Closed issues:**
+
+- 0.7.0 problems with NSAttributedString.Key [\#139](https://github.com/johnxnguyen/Down/issues/139)
+
+**Merged pull requests:**
+
+- \[Down\] Add new `unsafe` option [\#143](https://github.com/johnxnguyen/Down/pull/143) ([iwasrobbed](https://github.com/iwasrobbed))
+- Bump cmark to 0.29.0 [\#142](https://github.com/johnxnguyen/Down/pull/142) ([larryonoff](https://github.com/larryonoff))
+
+## [v0.7.0](https://github.com/johnxnguyen/Down/tree/v0.7.0) (2019-04-24)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.6...v0.7.0)
+
+**Implemented enhancements:**
+
+- \[Documentation\] AST API [\#134](https://github.com/johnxnguyen/Down/issues/134)
+- \[Attributed Strings\] Line spacing more than expected [\#121](https://github.com/johnxnguyen/Down/issues/121)
+- \[Down\] Rendering to attributed string is really slow, requires main thread [\#100](https://github.com/johnxnguyen/Down/issues/100)
+
+**Merged pull requests:**
+
+- Set Swift version 4.0 in podspec [\#140](https://github.com/johnxnguyen/Down/pull/140) ([larryonoff](https://github.com/larryonoff))
+- \[Cleanup\] Comment docs, example apps, and whitespace [\#136](https://github.com/johnxnguyen/Down/pull/136) ([iwasrobbed](https://github.com/iwasrobbed))
+- \[Feature\] Create API for parsing to AST and NSAttributedString [\#132](https://github.com/johnxnguyen/Down/pull/132) ([johnxnguyen](https://github.com/johnxnguyen))
+
+## [v0.6.6](https://github.com/johnxnguyen/Down/tree/v0.6.6) (2019-04-11)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.5...v0.6.6)
+
+**Closed issues:**
+
+- Swift 4/5 compatibility [\#131](https://github.com/johnxnguyen/Down/issues/131)
+
+**Merged pull requests:**
+
+- Wrap openURL so that Down compiles in app extensions [\#133](https://github.com/johnxnguyen/Down/pull/133) ([nheagy](https://github.com/nheagy))
+
+## [v0.6.5](https://github.com/johnxnguyen/Down/tree/v0.6.5) (2019-04-02)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.4...v0.6.5)
+
+**Merged pull requests:**
+
+- Fix Xcode 10.2 warnings [\#130](https://github.com/johnxnguyen/Down/pull/130) ([mdiep](https://github.com/mdiep))
+
+## [v0.6.4](https://github.com/johnxnguyen/Down/tree/v0.6.4) (2019-03-30)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.3...v0.6.4)
+
+**Closed issues:**
+
+- Support SwiftPM [\#128](https://github.com/johnxnguyen/Down/issues/128)
+- \[DownView\] Load multiple .md files \(link support\) [\#68](https://github.com/johnxnguyen/Down/issues/68)
+
+**Merged pull requests:**
+
+- Fix Swift module errors when used alongside Firestore [\#125](https://github.com/johnxnguyen/Down/pull/125) ([vzsg](https://github.com/vzsg))
+
+## [v0.6.3](https://github.com/johnxnguyen/Down/tree/v0.6.3) (2019-03-27)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.2...v0.6.3)
+
+**Implemented enhancements:**
+
+- \[DownView\] Doesn't reflow text on orientation change [\#111](https://github.com/johnxnguyen/Down/issues/111)
 
 **Fixed bugs:**
 
-- \[Xcode 10\] Crash in XCBuildService; need to use old build system [\#91](https://github.com/iwasrobbed/Down/issues/91)
+- Crash rendering markdown [\#126](https://github.com/johnxnguyen/Down/issues/126)
 
 **Closed issues:**
 
-- DownView font size on iPad is huge [\#102](https://github.com/iwasrobbed/Down/issues/102)
-- Is there a way to convert NSAttributedString back to markdown? [\#98](https://github.com/iwasrobbed/Down/issues/98)
-- Back Gesture [\#96](https://github.com/iwasrobbed/Down/issues/96)
-- Access for  [\#92](https://github.com/iwasrobbed/Down/issues/92)
-- Image size NSAttributedString [\#89](https://github.com/iwasrobbed/Down/issues/89)
-- Dependency analysis warnings with Cocoapods [\#88](https://github.com/iwasrobbed/Down/issues/88)
-- WatchKit Support [\#71](https://github.com/iwasrobbed/Down/issues/71)
-- Installation via Swift Package Manager [\#61](https://github.com/iwasrobbed/Down/issues/61)
+- Cocoapods: libcmark [\#124](https://github.com/johnxnguyen/Down/issues/124)
+- Use with storyboards [\#123](https://github.com/johnxnguyen/Down/issues/123)
+- support for audio markdown? [\#122](https://github.com/johnxnguyen/Down/issues/122)
+- \[Down\] Can't render toAttributedString while app is in background [\#116](https://github.com/johnxnguyen/Down/issues/116)
 
 **Merged pull requests:**
 
-- \[Xcode 10\]\[Carthage\] Use new build system [\#104](https://github.com/iwasrobbed/Down/pull/104) ([torokzsolt](https://github.com/torokzsolt))
-- Updates the project settings to use the Legacy Build System. [\#97](https://github.com/iwasrobbed/Down/pull/97) ([pieromattos](https://github.com/pieromattos))
-- \[Release\] v0.5.2 [\#87](https://github.com/iwasrobbed/Down/pull/87) ([iwasrobbed](https://github.com/iwasrobbed))
+- Fix crash from missing parser.h include [\#129](https://github.com/johnxnguyen/Down/pull/129) ([phoney](https://github.com/phoney))
+- Make the DownView reflow text on device rotation [\#127](https://github.com/johnxnguyen/Down/pull/127) ([phoney](https://github.com/phoney))
 
-## [v0.5.2](https://github.com/iwasrobbed/Down/tree/v0.5.2) (2018-05-05)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.5.1...v0.5.2)
+## [v0.6.2](https://github.com/johnxnguyen/Down/tree/v0.6.2) (2018-11-28)
 
-**Merged pull requests:**
-
-- \[Pods\] Only include files in source\_files that can be compiled [\#86](https://github.com/iwasrobbed/Down/pull/86) ([njdehoog](https://github.com/njdehoog))
-
-## [v0.5.1](https://github.com/iwasrobbed/Down/tree/v0.5.1) (2018-03-03)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.5.0...v0.5.1)
-
-**Closed issues:**
-
-- `DocumentReadingOptionKey` Error via pod [\#80](https://github.com/iwasrobbed/Down/issues/80)
-
-**Merged pull requests:**
-
-- Add optional stylesheet argument for NSAttributedString renderer [\#79](https://github.com/iwasrobbed/Down/pull/79) ([kengruven](https://github.com/kengruven))
-- Roll up cmark's COPYING sections into the top-level LICENSE file [\#78](https://github.com/iwasrobbed/Down/pull/78) ([kengruven](https://github.com/kengruven))
-- Update supported versions in README [\#77](https://github.com/iwasrobbed/Down/pull/77) ([kengruven](https://github.com/kengruven))
-
-## [v0.5.0](https://github.com/iwasrobbed/Down/tree/v0.5.0) (2018-02-24)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.4.2...v0.5.0)
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.1...v0.6.2)
 
 **Implemented enhancements:**
 
-- Fix/update example app [\#58](https://github.com/iwasrobbed/Down/pull/58) ([iwasrobbed](https://github.com/iwasrobbed))
+- \[cmark\] Some characters are escaped twice [\#99](https://github.com/johnxnguyen/Down/issues/99)
+
+**Merged pull requests:**
+
+- Add compiler flag to suppress implicit conversion warnings [\#118](https://github.com/johnxnguyen/Down/pull/118) ([phoney](https://github.com/phoney))
+
+## [v0.6.1](https://github.com/johnxnguyen/Down/tree/v0.6.1) (2018-11-23)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.6.0...v0.6.1)
+
+**Closed issues:**
+
+- 2 Swift Compiler Errors when installing Down on iOS [\#117](https://github.com/johnxnguyen/Down/issues/117)
+- How to update to the latest version of the cmark library [\#115](https://github.com/johnxnguyen/Down/issues/115)
+
+**Merged pull requests:**
+
+- \[travis\] Update to retry [\#114](https://github.com/johnxnguyen/Down/pull/114) ([iwasrobbed](https://github.com/iwasrobbed))
+- Fix macOS Platform, Custom URL Scheme Handler, Polish Demos. [\#110](https://github.com/johnxnguyen/Down/pull/110) ([chriszielinski](https://github.com/chriszielinski))
+
+## [v0.6.0](https://github.com/johnxnguyen/Down/tree/v0.6.0) (2018-11-10)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.5.3...v0.6.0)
+
+**Implemented enhancements:**
+
+- \[iOS 10+\] Warnings for WebKit signal service and latex.c [\#94](https://github.com/johnxnguyen/Down/issues/94)
+- Update cmark version to latest stable release [\#84](https://github.com/johnxnguyen/Down/issues/84)
+
+**Closed issues:**
+
+- HTML to Markdowndow? [\#107](https://github.com/johnxnguyen/Down/issues/107)
+- Blockquote does not work in NSAttributedString [\#106](https://github.com/johnxnguyen/Down/issues/106)
+- Support for Dynamic Type [\#90](https://github.com/johnxnguyen/Down/issues/90)
+
+**Merged pull requests:**
+
+- \[Down\] Bump to v0.6.0 [\#113](https://github.com/johnxnguyen/Down/pull/113) ([iwasrobbed](https://github.com/iwasrobbed))
+- \[cmark\] Update lib to v0.28.3 [\#112](https://github.com/johnxnguyen/Down/pull/112) ([phoney](https://github.com/phoney))
+- Update project to Xcode 10 [\#109](https://github.com/johnxnguyen/Down/pull/109) ([funkyboy](https://github.com/funkyboy))
+
+## [v0.5.3](https://github.com/johnxnguyen/Down/tree/v0.5.3) (2018-09-19)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.5.2...v0.5.3)
+
+**Implemented enhancements:**
+
+- &rdquo; not being rendered [\#95](https://github.com/johnxnguyen/Down/issues/95)
+- Update issue templates [\#101](https://github.com/johnxnguyen/Down/pull/101) ([iwasrobbed](https://github.com/iwasrobbed))
 
 **Fixed bugs:**
 
-- Building for tvOS fails [\#49](https://github.com/iwasrobbed/Down/issues/49)
-- Fix Carthage builds [\#72](https://github.com/iwasrobbed/Down/pull/72) ([tonyarnold](https://github.com/tonyarnold))
-- Fix/update example app [\#58](https://github.com/iwasrobbed/Down/pull/58) ([iwasrobbed](https://github.com/iwasrobbed))
+- \[Xcode 10\] Crash in XCBuildService; need to use old build system [\#91](https://github.com/johnxnguyen/Down/issues/91)
 
 **Closed issues:**
 
-- Swift 3+ convention for capitalization [\#74](https://github.com/iwasrobbed/Down/issues/74)
-- macOS 10.11 support? [\#73](https://github.com/iwasrobbed/Down/issues/73)
-- Installing with Carthage for Mac fails [\#70](https://github.com/iwasrobbed/Down/issues/70)
-- Error building/installing Down [\#69](https://github.com/iwasrobbed/Down/issues/69)
-- get heigth when add downview to other view? [\#67](https://github.com/iwasrobbed/Down/issues/67)
-- iOS8 crash [\#66](https://github.com/iwasrobbed/Down/issues/66)
-- Image caching [\#65](https://github.com/iwasrobbed/Down/issues/65)
-- Some warnings to fix [\#64](https://github.com/iwasrobbed/Down/issues/64)
-- build error [\#63](https://github.com/iwasrobbed/Down/issues/63)
-- Lists and paragraph spacing [\#62](https://github.com/iwasrobbed/Down/issues/62)
-- Converting Markdown string to HTML with emojis [\#60](https://github.com/iwasrobbed/Down/issues/60)
-- Syntax highlighting themes [\#59](https://github.com/iwasrobbed/Down/issues/59)
-- Compiling error on example project [\#57](https://github.com/iwasrobbed/Down/issues/57)
-- Compilation error using Carthage [\#54](https://github.com/iwasrobbed/Down/issues/54)
+- DownView font size on iPad is huge [\#102](https://github.com/johnxnguyen/Down/issues/102)
+- Is there a way to convert NSAttributedString back to markdown? [\#98](https://github.com/johnxnguyen/Down/issues/98)
+- Back Gesture [\#96](https://github.com/johnxnguyen/Down/issues/96)
+- Access for  [\#92](https://github.com/johnxnguyen/Down/issues/92)
+- Image size NSAttributedString [\#89](https://github.com/johnxnguyen/Down/issues/89)
+- Dependency analysis warnings with Cocoapods [\#88](https://github.com/johnxnguyen/Down/issues/88)
+- WatchKit Support [\#71](https://github.com/johnxnguyen/Down/issues/71)
+- Installation via Swift Package Manager [\#61](https://github.com/johnxnguyen/Down/issues/61)
 
 **Merged pull requests:**
 
-- Use lower-case Swift 3 convention for DownOptions [\#76](https://github.com/iwasrobbed/Down/pull/76) ([kengruven](https://github.com/kengruven))
-- Lower MACOSX\_DEPLOYMENT\_TARGET to include El Capitan [\#75](https://github.com/iwasrobbed/Down/pull/75) ([kengruven](https://github.com/kengruven))
-- WebKit not available on watchOS. [\#56](https://github.com/iwasrobbed/Down/pull/56) ([128keaton](https://github.com/128keaton))
-- Update README.md [\#55](https://github.com/iwasrobbed/Down/pull/55) ([128keaton](https://github.com/128keaton))
-- Updated Copyright year in ReadMe file [\#53](https://github.com/iwasrobbed/Down/pull/53) ([jobinsjohn](https://github.com/jobinsjohn))
+- \[Xcode 10\]\[Carthage\] Use new build system [\#104](https://github.com/johnxnguyen/Down/pull/104) ([torokzsolt](https://github.com/torokzsolt))
+- Updates the project settings to use the Legacy Build System. [\#97](https://github.com/johnxnguyen/Down/pull/97) ([pieromattos](https://github.com/pieromattos))
+- \[Release\] v0.5.2 [\#87](https://github.com/johnxnguyen/Down/pull/87) ([iwasrobbed](https://github.com/iwasrobbed))
 
-## [v0.4.2](https://github.com/iwasrobbed/Down/tree/v0.4.2) (2017-10-21)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.4.1...v0.4.2)
+## [v0.5.2](https://github.com/johnxnguyen/Down/tree/v0.5.2) (2018-05-05)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.5.1...v0.5.2)
+
+**Merged pull requests:**
+
+- \[Pods\] Only include files in source\_files that can be compiled [\#86](https://github.com/johnxnguyen/Down/pull/86) ([njdehoog](https://github.com/njdehoog))
+
+## [v0.5.1](https://github.com/johnxnguyen/Down/tree/v0.5.1) (2018-03-03)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.5.0...v0.5.1)
 
 **Closed issues:**
 
-- Push v0.4.1 to cocoapods  [\#51](https://github.com/iwasrobbed/Down/issues/51)
+- `DocumentReadingOptionKey` Error via pod [\#80](https://github.com/johnxnguyen/Down/issues/80)
 
 **Merged pull requests:**
 
-- \[tvOS\] Conditionally compile DownView [\#52](https://github.com/iwasrobbed/Down/pull/52) ([iwasrobbed](https://github.com/iwasrobbed))
+- Add optional stylesheet argument for NSAttributedString renderer [\#79](https://github.com/johnxnguyen/Down/pull/79) ([kengruven](https://github.com/kengruven))
+- Roll up cmark's COPYING sections into the top-level LICENSE file [\#78](https://github.com/johnxnguyen/Down/pull/78) ([kengruven](https://github.com/kengruven))
+- Update supported versions in README [\#77](https://github.com/johnxnguyen/Down/pull/77) ([kengruven](https://github.com/kengruven))
 
-## [v0.4.1](https://github.com/iwasrobbed/Down/tree/v0.4.1) (2017-10-04)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.4.0...v0.4.1)
+## [v0.5.0](https://github.com/johnxnguyen/Down/tree/v0.5.0) (2018-02-24)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.4.2...v0.5.0)
+
+**Implemented enhancements:**
+
+- Fix/update example app [\#58](https://github.com/johnxnguyen/Down/pull/58) ([iwasrobbed](https://github.com/iwasrobbed))
+
+**Fixed bugs:**
+
+- Building for tvOS fails [\#49](https://github.com/johnxnguyen/Down/issues/49)
+- Fix Carthage builds [\#72](https://github.com/johnxnguyen/Down/pull/72) ([tonyarnold](https://github.com/tonyarnold))
 
 **Closed issues:**
 
-- Carthage install fails: no such module 'libcmark' [\#43](https://github.com/iwasrobbed/Down/issues/43)
-- Xcode 8.3 warnings [\#26](https://github.com/iwasrobbed/Down/issues/26)
+- Swift 3+ convention for capitalization [\#74](https://github.com/johnxnguyen/Down/issues/74)
+- macOS 10.11 support? [\#73](https://github.com/johnxnguyen/Down/issues/73)
+- Installing with Carthage for Mac fails [\#70](https://github.com/johnxnguyen/Down/issues/70)
+- Error building/installing Down [\#69](https://github.com/johnxnguyen/Down/issues/69)
+- get heigth when add downview to other view? [\#67](https://github.com/johnxnguyen/Down/issues/67)
+- iOS8 crash [\#66](https://github.com/johnxnguyen/Down/issues/66)
+- Image caching [\#65](https://github.com/johnxnguyen/Down/issues/65)
+- Some warnings to fix [\#64](https://github.com/johnxnguyen/Down/issues/64)
+- build error [\#63](https://github.com/johnxnguyen/Down/issues/63)
+- Lists and paragraph spacing [\#62](https://github.com/johnxnguyen/Down/issues/62)
+- Converting Markdown string to HTML with emojis [\#60](https://github.com/johnxnguyen/Down/issues/60)
+- Syntax highlighting themes [\#59](https://github.com/johnxnguyen/Down/issues/59)
+- Compiling error on example project [\#57](https://github.com/johnxnguyen/Down/issues/57)
+- Compilation error using Carthage [\#54](https://github.com/johnxnguyen/Down/issues/54)
 
 **Merged pull requests:**
 
-- Adds filters to remove Xcode-specific warnings [\#48](https://github.com/iwasrobbed/Down/pull/48) ([128keaton](https://github.com/128keaton))
-- Fixes issue \#43 [\#47](https://github.com/iwasrobbed/Down/pull/47) ([128keaton](https://github.com/128keaton))
-- Update to Swift 4  [\#46](https://github.com/iwasrobbed/Down/pull/46) ([iwasrobbed](https://github.com/iwasrobbed))
-- Fixed error with accessing shared workspace. [\#44](https://github.com/iwasrobbed/Down/pull/44) ([mjzac](https://github.com/mjzac))
+- Use lower-case Swift 3 convention for DownOptions [\#76](https://github.com/johnxnguyen/Down/pull/76) ([kengruven](https://github.com/kengruven))
+- Lower MACOSX\_DEPLOYMENT\_TARGET to include El Capitan [\#75](https://github.com/johnxnguyen/Down/pull/75) ([kengruven](https://github.com/kengruven))
+- WebKit not available on watchOS. [\#56](https://github.com/johnxnguyen/Down/pull/56) ([128keaton](https://github.com/128keaton))
+- Update README.md [\#55](https://github.com/johnxnguyen/Down/pull/55) ([128keaton](https://github.com/128keaton))
+- Updated Copyright year in ReadMe file [\#53](https://github.com/johnxnguyen/Down/pull/53) ([jobinsjohn](https://github.com/jobinsjohn))
 
-## [v0.4.0](https://github.com/iwasrobbed/Down/tree/v0.4.0) (2017-08-31)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.3.5...v0.4.0)
+## [v0.4.2](https://github.com/johnxnguyen/Down/tree/v0.4.2) (2017-10-21)
 
-**Implemented enhancements:**
-
-- Example project [\#37](https://github.com/iwasrobbed/Down/issues/37)
-- Markdown tables support [\#36](https://github.com/iwasrobbed/Down/issues/36)
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.4.1...v0.4.2)
 
 **Closed issues:**
 
-- Unable to build with Xcode 9 [\#41](https://github.com/iwasrobbed/Down/issues/41)
-- Can not load local image and link to local .md file [\#40](https://github.com/iwasrobbed/Down/issues/40)
-- Fenced code syntax highlighting [\#35](https://github.com/iwasrobbed/Down/issues/35)
-- down.toAttributedString\(\) custom text font and image size [\#33](https://github.com/iwasrobbed/Down/issues/33)
+- Push v0.4.1 to cocoapods  [\#51](https://github.com/johnxnguyen/Down/issues/51)
 
 **Merged pull requests:**
 
-- Closes “Example” Issue [\#38](https://github.com/iwasrobbed/Down/pull/38) ([128keaton](https://github.com/128keaton))
-- Prevent zoom documentation [\#34](https://github.com/iwasrobbed/Down/pull/34) ([Kumuluzz](https://github.com/Kumuluzz))
+- \[tvOS\] Conditionally compile DownView [\#52](https://github.com/johnxnguyen/Down/pull/52) ([iwasrobbed](https://github.com/iwasrobbed))
 
-## [v0.3.5](https://github.com/iwasrobbed/Down/tree/v0.3.5) (2017-05-25)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.3.4...v0.3.5)
+## [v0.4.1](https://github.com/johnxnguyen/Down/tree/v0.4.1) (2017-10-04)
 
-**Implemented enhancements:**
-
-- Disable analysis of cmark source code [\#31](https://github.com/iwasrobbed/Down/pull/31) ([tonyarnold](https://github.com/tonyarnold))
-
-## [v0.3.4](https://github.com/iwasrobbed/Down/tree/v0.3.4) (2017-05-13)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.3.3...v0.3.4)
-
-**Merged pull requests:**
-
-- Suggested project fixes/changes [\#28](https://github.com/iwasrobbed/Down/pull/28) ([tonyarnold](https://github.com/tonyarnold))
-- Add the ability to initialise a DownView using a custom template bundle [\#27](https://github.com/iwasrobbed/Down/pull/27) ([tonyarnold](https://github.com/tonyarnold))
-
-## [v0.3.3](https://github.com/iwasrobbed/Down/tree/v0.3.3) (2017-03-09)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.3.2...v0.3.3)
-
-**Implemented enhancements:**
-
-- Add OS X support [\#6](https://github.com/iwasrobbed/Down/issues/6)
-
-**Merged pull requests:**
-
-- \#6 macOS Support [\#25](https://github.com/iwasrobbed/Down/pull/25) ([128keaton](https://github.com/128keaton))
-
-## [v0.3.2](https://github.com/iwasrobbed/Down/tree/v0.3.2) (2017-02-26)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.3.1...v0.3.2)
-
-**Implemented enhancements:**
-
-- Create changelog [\#20](https://github.com/iwasrobbed/Down/issues/20)
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.4.0...v0.4.1)
 
 **Closed issues:**
 
-- A faster substitute to NSHTMLTextDocumentType? [\#23](https://github.com/iwasrobbed/Down/issues/23)
-- How to update DownView content and keep the style? [\#19](https://github.com/iwasrobbed/Down/issues/19)
+- Carthage install fails: no such module 'libcmark' [\#43](https://github.com/johnxnguyen/Down/issues/43)
+- Xcode 8.3 warnings [\#26](https://github.com/johnxnguyen/Down/issues/26)
 
 **Merged pull requests:**
 
-- Add tvOS support [\#24](https://github.com/iwasrobbed/Down/pull/24) ([invliD](https://github.com/invliD))
-- v0.3.1: Add the ability to update DownView content [\#22](https://github.com/iwasrobbed/Down/pull/22) ([iwasrobbed](https://github.com/iwasrobbed))
+- Adds filters to remove Xcode-specific warnings [\#48](https://github.com/johnxnguyen/Down/pull/48) ([128keaton](https://github.com/128keaton))
+- Fixes issue \#43 [\#47](https://github.com/johnxnguyen/Down/pull/47) ([128keaton](https://github.com/128keaton))
+- Update to Swift 4  [\#46](https://github.com/johnxnguyen/Down/pull/46) ([iwasrobbed](https://github.com/iwasrobbed))
 
-## [v0.3.1](https://github.com/iwasrobbed/Down/tree/v0.3.1) (2017-02-09)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.3...v0.3.1)
+## [v0.4.0](https://github.com/johnxnguyen/Down/tree/v0.4.0) (2017-08-31)
 
-**Closed issues:**
-
-- How to keep UITextView font style [\#21](https://github.com/iwasrobbed/Down/issues/21)
-- Define custom fonts [\#18](https://github.com/iwasrobbed/Down/issues/18)
-- Render progress [\#17](https://github.com/iwasrobbed/Down/issues/17)
-- Disable zoom WebView [\#16](https://github.com/iwasrobbed/Down/issues/16)
-- Text Size of DownView too small [\#15](https://github.com/iwasrobbed/Down/issues/15)
-- How to customize the Font? [\#14](https://github.com/iwasrobbed/Down/issues/14)
-- Support Images [\#13](https://github.com/iwasrobbed/Down/issues/13)
-- How to manually install \(w/o Carthage or CocoaPods\) [\#12](https://github.com/iwasrobbed/Down/issues/12)
-- Add support for Carthage [\#8](https://github.com/iwasrobbed/Down/issues/8)
-
-## [v0.3](https://github.com/iwasrobbed/Down/tree/v0.3) (2016-10-12)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.2...v0.3)
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.3.5...v0.4.0)
 
 **Implemented enhancements:**
 
-- Swift 3.0 support [\#10](https://github.com/iwasrobbed/Down/issues/10)
-- Add web view for rendering output [\#3](https://github.com/iwasrobbed/Down/issues/3)
+- Example project [\#37](https://github.com/johnxnguyen/Down/issues/37)
+- Markdown tables support [\#36](https://github.com/johnxnguyen/Down/issues/36)
 
 **Closed issues:**
 
-- Can you give an example how to custom the parser? [\#9](https://github.com/iwasrobbed/Down/issues/9)
+- Unable to build with Xcode 9 [\#41](https://github.com/johnxnguyen/Down/issues/41)
+- Can not load local image and link to local .md file [\#40](https://github.com/johnxnguyen/Down/issues/40)
+- Fenced code syntax highlighting [\#35](https://github.com/johnxnguyen/Down/issues/35)
+- down.toAttributedString\(\) custom text font and image size [\#33](https://github.com/johnxnguyen/Down/issues/33)
 
 **Merged pull requests:**
 
-- Swift 3 [\#11](https://github.com/iwasrobbed/Down/pull/11) ([azeff](https://github.com/azeff))
-- Adds a few extra tests where possible [\#7](https://github.com/iwasrobbed/Down/pull/7) ([iwasrobbed](https://github.com/iwasrobbed))
-- DownView rendering to close \#3 [\#5](https://github.com/iwasrobbed/Down/pull/5) ([iwasrobbed](https://github.com/iwasrobbed))
+- Closes “Example” Issue [\#38](https://github.com/johnxnguyen/Down/pull/38) ([128keaton](https://github.com/128keaton))
+- Prevent zoom documentation [\#34](https://github.com/johnxnguyen/Down/pull/34) ([Kumuluzz](https://github.com/Kumuluzz))
 
-## [v0.2](https://github.com/iwasrobbed/Down/tree/v0.2) (2016-06-02)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.1.1...v0.2)
+## [v0.3.5](https://github.com/johnxnguyen/Down/tree/v0.3.5) (2017-05-25)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.3.4...v0.3.5)
 
 **Implemented enhancements:**
 
-- Add attributed string support [\#2](https://github.com/iwasrobbed/Down/issues/2)
-- Adds attributed string rendering [\#4](https://github.com/iwasrobbed/Down/pull/4) ([iwasrobbed](https://github.com/iwasrobbed))
+- Disable analysis of cmark source code [\#31](https://github.com/johnxnguyen/Down/pull/31) ([tonyarnold](https://github.com/tonyarnold))
 
-## [v0.1.1](https://github.com/iwasrobbed/Down/tree/v0.1.1) (2016-06-01)
-[Full Changelog](https://github.com/iwasrobbed/Down/compare/v0.1...v0.1.1)
+## [v0.3.4](https://github.com/johnxnguyen/Down/tree/v0.3.4) (2017-05-13)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.3.3...v0.3.4)
+
+**Merged pull requests:**
+
+- Suggested project fixes/changes [\#28](https://github.com/johnxnguyen/Down/pull/28) ([tonyarnold](https://github.com/tonyarnold))
+- Add the ability to initialise a DownView using a custom template bundle [\#27](https://github.com/johnxnguyen/Down/pull/27) ([tonyarnold](https://github.com/tonyarnold))
+
+## [v0.3.3](https://github.com/johnxnguyen/Down/tree/v0.3.3) (2017-03-09)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.3.2...v0.3.3)
 
 **Implemented enhancements:**
 
-- Add CocoaPods support & cmark license [\#1](https://github.com/iwasrobbed/Down/pull/1) ([iwasrobbed](https://github.com/iwasrobbed))
+- Add OS X support [\#6](https://github.com/johnxnguyen/Down/issues/6)
 
-## [v0.1](https://github.com/iwasrobbed/Down/tree/v0.1) (2016-06-01)
+**Merged pull requests:**
+
+- \#6 macOS Support [\#25](https://github.com/johnxnguyen/Down/pull/25) ([128keaton](https://github.com/128keaton))
+
+## [v0.3.2](https://github.com/johnxnguyen/Down/tree/v0.3.2) (2017-02-26)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.3.1...v0.3.2)
+
+**Implemented enhancements:**
+
+- Create changelog [\#20](https://github.com/johnxnguyen/Down/issues/20)
+
+**Closed issues:**
+
+- A faster substitute to NSHTMLTextDocumentType? [\#23](https://github.com/johnxnguyen/Down/issues/23)
+- How to update DownView content and keep the style? [\#19](https://github.com/johnxnguyen/Down/issues/19)
+
+**Merged pull requests:**
+
+- Add tvOS support [\#24](https://github.com/johnxnguyen/Down/pull/24) ([invliD](https://github.com/invliD))
+- v0.3.1: Add the ability to update DownView content [\#22](https://github.com/johnxnguyen/Down/pull/22) ([iwasrobbed](https://github.com/iwasrobbed))
+
+## [v0.3.1](https://github.com/johnxnguyen/Down/tree/v0.3.1) (2017-02-09)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.3...v0.3.1)
+
+**Closed issues:**
+
+- How to keep UITextView font style [\#21](https://github.com/johnxnguyen/Down/issues/21)
+- Define custom fonts [\#18](https://github.com/johnxnguyen/Down/issues/18)
+- Render progress [\#17](https://github.com/johnxnguyen/Down/issues/17)
+- Disable zoom WebView [\#16](https://github.com/johnxnguyen/Down/issues/16)
+- Text Size of DownView too small [\#15](https://github.com/johnxnguyen/Down/issues/15)
+- How to customize the Font? [\#14](https://github.com/johnxnguyen/Down/issues/14)
+- Support Images [\#13](https://github.com/johnxnguyen/Down/issues/13)
+- How to manually install \(w/o Carthage or CocoaPods\) [\#12](https://github.com/johnxnguyen/Down/issues/12)
+- Add support for Carthage [\#8](https://github.com/johnxnguyen/Down/issues/8)
+
+## [v0.3](https://github.com/johnxnguyen/Down/tree/v0.3) (2016-10-12)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.2...v0.3)
+
+**Implemented enhancements:**
+
+- Swift 3.0 support [\#10](https://github.com/johnxnguyen/Down/issues/10)
+- Add web view for rendering output [\#3](https://github.com/johnxnguyen/Down/issues/3)
+
+**Closed issues:**
+
+- Can you give an example how to custom the parser? [\#9](https://github.com/johnxnguyen/Down/issues/9)
+
+**Merged pull requests:**
+
+- Swift 3 [\#11](https://github.com/johnxnguyen/Down/pull/11) ([azeff](https://github.com/azeff))
+- Adds a few extra tests where possible [\#7](https://github.com/johnxnguyen/Down/pull/7) ([iwasrobbed](https://github.com/iwasrobbed))
+- DownView rendering to close \#3 [\#5](https://github.com/johnxnguyen/Down/pull/5) ([iwasrobbed](https://github.com/iwasrobbed))
+
+## [v0.2](https://github.com/johnxnguyen/Down/tree/v0.2) (2016-06-02)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.1.1...v0.2)
+
+**Implemented enhancements:**
+
+- Add attributed string support [\#2](https://github.com/johnxnguyen/Down/issues/2)
+- Adds attributed string rendering [\#4](https://github.com/johnxnguyen/Down/pull/4) ([iwasrobbed](https://github.com/iwasrobbed))
+
+## [v0.1.1](https://github.com/johnxnguyen/Down/tree/v0.1.1) (2016-06-01)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/v0.1...v0.1.1)
+
+**Implemented enhancements:**
+
+- Add CocoaPods support & cmark license [\#1](https://github.com/johnxnguyen/Down/pull/1) ([iwasrobbed](https://github.com/iwasrobbed))
+
+## [v0.1](https://github.com/johnxnguyen/Down/tree/v0.1) (2016-06-01)
+
+[Full Changelog](https://github.com/johnxnguyen/Down/compare/69fba2a97e45a07360054a811cac018bec10e17d...v0.1)
 
 
-\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*
+
+\* *This Changelog was automatically generated by [github_changelog_generator](https://github.com/github-changelog-generator/github-changelog-generator)*

Down-Example/Down-Example.xcodeproj/project.pbxproj

@@ -11,28 +11,28 @@
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-		14090A5A2185414B00503C06 /* Down.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = D49980B51FA560F8004EE42E /* Down.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
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 		8A07D7DD1F085EC6004D7141 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 8A07D7DB1F085EC6004D7141 /* LaunchScreen.storyboard */; };
+		D4591E9C226D293F00EBD476 /* Down.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D49980B51FA560F8004EE42E /* Down.framework */; };
+		D4591E9D226D293F00EBD476 /* Down.framework in Embed Frameworks */ = {isa = PBXBuildFile; fileRef = D49980B51FA560F8004EE42E /* Down.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
-		14090A5B2185414B00503C06 /* PBXContainerItemProxy */ = {
+		14664180218D2A18009627F9 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = D49980AF1FA560F8004EE42E /* Down.xcodeproj */;
 			proxyType = 1;
 			remoteGlobalIDString = 8A569F3F1E6B3E50008BE2AC;
 			remoteInfo = Down;
 		};
-		14664180218D2A18009627F9 /* PBXContainerItemProxy */ = {
+		D4591E9E226D293F00EBD476 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = D49980AF1FA560F8004EE42E /* Down.xcodeproj */;
 			proxyType = 1;
@@ -53,20 +53,16 @@
 			remoteGlobalIDString = 8AFAEAFB1E6E32E900E09B68;
 			remoteInfo = DownTests;
 		};
+		D4C77E06240EEB64004675B3 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = D49980AF1FA560F8004EE42E /* Down.xcodeproj */;
+			proxyType = 2;
+			remoteGlobalIDString = EEBA153A2344845500B54ECB;
+			remoteInfo = DownSnapshotTests;
+		};
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXCopyFilesBuildPhase section */
-		14090A5D2185414B00503C06 /* Embed Frameworks */ = {
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-			dstSubfolderSpec = 10;
-			files = (
-				14090A5A2185414B00503C06 /* Down.framework in Embed Frameworks */,
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-			runOnlyForDeploymentPostprocessing = 0;
-		};
 		14664182218D2A18009627F9 /* Embed Frameworks */ = {
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 			buildActionMask = 2147483647;
@@ -78,6 +74,17 @@
 			name = "Embed Frameworks";
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		D4591EA0226D293F00EBD476 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+				D4591E9D226D293F00EBD476 /* Down.framework in Embed Frameworks */,
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
@@ -88,7 +95,7 @@
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+		14954EA421A7DCA3001933C4 /* README-sample.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = "README-sample.md"; sourceTree = "<group>"; };
 		8A07D7CF1F085EC6004D7141 /* Down-Example.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "Down-Example.app"; sourceTree = BUILT_PRODUCTS_DIR; };
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 		8A07D7D41F085EC6004D7141 /* ViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewController.swift; sourceTree = "<group>"; };
@@ -104,7 +111,7 @@
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 			buildActionMask = 2147483647;
 			files = (
-				14090A592185414B00503C06 /* Down.framework in Frameworks */,
+				D4591E9C226D293F00EBD476 /* Down.framework in Frameworks */,
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 		};
@@ -142,7 +149,7 @@
 		14954EA321A7DCA3001933C4 /* Shared */ = {
 			isa = PBXGroup;
 			children = (
-				14954EA421A7DCA3001933C4 /* README-11:2:18.md */,
+				14954EA421A7DCA3001933C4 /* README-sample.md */,
 			);
 			path = Shared;
 			sourceTree = "<group>";
@@ -186,6 +193,7 @@
 			children = (
 				D49980B51FA560F8004EE42E /* Down.framework */,
 				D49980B71FA560F8004EE42E /* DownTests.xctest */,
+				D4C77E07240EEB64004675B3 /* DownSnapshotTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -200,12 +208,12 @@
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 				14090A462185411800503C06 /* Frameworks */,
 				14090A472185411800503C06 /* Resources */,
-				14090A5D2185414B00503C06 /* Embed Frameworks */,
+				D4591EA0226D293F00EBD476 /* Embed Frameworks */,
 			);
 			buildRules = (
 			);
 			dependencies = (
-				14090A5C2185414B00503C06 /* PBXTargetDependency */,
+				D4591E9F226D293F00EBD476 /* PBXTargetDependency */,
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 			name = "macOS Demo";
 			productName = "macOS Demo";
@@ -238,11 +246,13 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 1000;
-				LastUpgradeCheck = 1000;
-				ORGANIZATIONNAME = down;
+				LastUpgradeCheck = 1130;
+				ORGANIZATIONNAME = Down;
 				TargetAttributes = {
 					14090A482185411800503C06 = {
 						CreatedOnToolsVersion = 10.0;
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+						LastSwiftMigration = 1020;
 						ProvisioningStyle = Automatic;
 						SystemCapabilities = {
 							com.apple.Sandbox = {
@@ -252,13 +262,13 @@
 					};
 					8A07D7CE1F085EC6004D7141 = {
 						CreatedOnToolsVersion = 8.3.3;
-						LastSwiftMigration = 0900;
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 					};
 				};
 			};
 			buildConfigurationList = 8A07D7CA1F085EC6004D7141 /* Build configuration list for PBXProject "Down-Example" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
@@ -296,6 +306,13 @@
 			remoteRef = D49980B61FA560F8004EE42E /* PBXContainerItemProxy */;
 			sourceTree = BUILT_PRODUCTS_DIR;
 		};
+		D4C77E07240EEB64004675B3 /* DownSnapshotTests.xctest */ = {
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+			fileType = wrapper.cfbundle;
+			path = DownSnapshotTests.xctest;
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 				14090A532185411A00503C06 /* Main.storyboard in Resources */,
-				14954EA521A7DCB9001933C4 /* README-11:2:18.md in Resources */,
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 			buildActionMask = 2147483647;
 			files = (
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 				8A07D7DA1F085EC6004D7141 /* Assets.xcassets in Resources */,
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 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
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 			isa = PBXTargetDependency;
 			name = Down;
 			targetProxy = 14664180218D2A18009627F9 /* PBXContainerItemProxy */;
 		};
+		D4591E9F226D293F00EBD476 /* PBXTargetDependency */ = {
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 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */
@@ -396,17 +413,18 @@
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 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = 7V68668DJN;
+				ENABLE_HARDENED_RUNTIME = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "macOS Demo/Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = "com.glazeddonut.macOS-Demo";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.downMarkdown.macOS-Demo";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -422,16 +440,17 @@
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 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				DEVELOPMENT_TEAM = "";
+				DEVELOPMENT_TEAM = 7V68668DJN;
+				ENABLE_HARDENED_RUNTIME = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				INFOPLIST_FILE = "macOS Demo/Info.plist";
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.11;
 				MTL_FAST_MATH = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = "com.glazeddonut.macOS-Demo";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.downMarkdown.macOS-Demo";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = macosx;
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -439,6 +458,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
@@ -499,6 +519,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
@@ -561,11 +582,10 @@
 				INFOPLIST_FILE = "Down-Example/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 10.2;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				PRODUCT_BUNDLE_IDENTIFIER = "com.glazeddonut.Down-Example";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.downMarkdown.Down-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -582,11 +602,10 @@
 				INFOPLIST_FILE = "Down-Example/Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 10.2;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
-				PRODUCT_BUNDLE_IDENTIFIER = "com.glazeddonut.Down-Example";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.downMarkdown.Down-Example";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};

Down-Example/Down-Example.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "SnapshotTesting",
+        "repositoryURL": "https://github.com/pointfreeco/swift-snapshot-testing.git",
+        "state": {
+          "branch": null,
+          "revision": "c466812aa2e22898f27557e2e780d3aad7a27203",
+          "version": "1.8.2"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Down-Example/Down-Example.xcodeproj/xcshareddata/xcschemes/Down-Example.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1010"
+   LastUpgradeVersion = "1130"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -27,8 +27,6 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -38,8 +36,8 @@
             ReferencedContainer = "container:Down-Example.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
+      <Testables>
+      </Testables>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -61,8 +59,6 @@
             ReferencedContainer = "container:Down-Example.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"

Down-Example/Down-Example.xcodeproj/xcshareddata/xcschemes/macOS Demo.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1010"
+   LastUpgradeVersion = "1130"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -27,8 +27,6 @@
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       shouldUseLaunchSchemeArgsEnv = "YES">
-      <Testables>
-      </Testables>
       <MacroExpansion>
          <BuildableReference
             BuildableIdentifier = "primary"
@@ -38,8 +36,8 @@
             ReferencedContainer = "container:Down-Example.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
+      <Testables>
+      </Testables>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -61,8 +59,6 @@
             ReferencedContainer = "container:Down-Example.xcodeproj">
          </BuildableReference>
       </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"

Down-Example/Down-Example.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-<dict>
-	<key>IDEDidComputeMac32BitWarning</key>
-	<true/>
-</dict>
-</plist>

Down-Example/Down-Example/AppDelegate.swift

@@ -3,21 +3,13 @@
 //  Down-Example
 //
 //  Created by Keaton Burleson on 7/1/17.
-//  Copyright © 2017 down. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
 import UIKit
 
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
-
     var window: UIWindow?
-
-
-    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
-        // Override point for customization after application launch.
-        return true
-    }
-
 }
 

Down-Example/Down-Example/Info.plist

@@ -35,6 +35,8 @@
 	<key>UISupportedInterfaceOrientations</key>
 	<array>
 		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
 	<key>UISupportedInterfaceOrientations~ipad</key>
 	<array>

Down-Example/Down-Example/ViewController.swift

@@ -3,51 +3,67 @@
 //  Down-Example
 //
 //  Created by Keaton Burleson on 7/1/17.
-//  Copyright © 2017 down. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
 import UIKit
 import Down
 
-class ViewController: UIViewController {
-
-    var downView: DownView!
-
+final class ViewController: UIViewController {
+    
     override func viewDidLoad() {
         super.viewDidLoad()
 
-        let readMeURL = Bundle.main.url(forResource: nil, withExtension: "md")!
-        let readMeContents = try! String(contentsOf: readMeURL)
+        renderDownInWebView()
+    }
+    
+}
 
+private extension ViewController {
+    
+    func renderDownInWebView() {
+        guard let readMeURL = Bundle.main.url(forResource: nil, withExtension: "md"),
+              let readMeContents = try? String(contentsOf: readMeURL)
+            else {
+                showError(message: "Could not load readme contents.")
+                return
+        }
+        
         do {
-            downView = try DownView(frame: view.bounds, markdownString: readMeContents, didLoadSuccessfully: {
+            let downView = try DownView(frame: view.bounds, markdownString: readMeContents, didLoadSuccessfully: {
                 print("Markdown was rendered.")
             })
+            downView.translatesAutoresizingMaskIntoConstraints = false
+            view.addSubview(downView)
+            constrain(subview: downView)
+            createStatusBarBackgrounds(above: downView)
         } catch {
-            let alertController = UIAlertController(title: "DownView Render Error",
-                                                    message: error.localizedDescription,
-                                                    preferredStyle: .alert)
-            self.present(alertController, animated: true, completion: nil)
+            showError(message: error.localizedDescription)
         }
-
-        view.addSubview(downView)
-
-        createStatusBarBackgrounds()
     }
-
-    func createStatusBarBackgrounds() {
+    
+    func createStatusBarBackgrounds(above subview: UIView) {
         let blurEffect = UIBlurEffect(style: .prominent)
         let blurEffectView = UIVisualEffectView(effect: blurEffect)
         blurEffectView.translatesAutoresizingMaskIntoConstraints = false
-        view.insertSubview(blurEffectView, aboveSubview: downView)
-
-        NSLayoutConstraint.activate([
-            blurEffectView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
-            blurEffectView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
-            blurEffectView.topAnchor.constraint(equalTo: topLayoutGuide.topAnchor),
-            blurEffectView.bottomAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor)
-            ])
+        view.insertSubview(blurEffectView, aboveSubview: subview)
+        constrain(subview: blurEffectView, bottomAnchor: topLayoutGuide.bottomAnchor)
     }
-
+    
+    func constrain(subview: UIView, bottomAnchor: NSLayoutYAxisAnchor? = nil) {
+        NSLayoutConstraint.activate([
+            subview.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+            subview.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+            subview.topAnchor.constraint(equalTo: topLayoutGuide.topAnchor),
+            subview.bottomAnchor.constraint(equalTo: bottomAnchor ?? bottomLayoutGuide.bottomAnchor)
+        ])
+    }
+    
+    func showError(message: String) {
+        let alertController = UIAlertController(title: "DownView Render Error",
+                                                message: message,
+                                                preferredStyle: .alert)
+        self.present(alertController, animated: true, completion: nil)
+    }
+    
 }
-

Down-Example/Shared/README-sample.md

@@ -8,23 +8,26 @@
 [![tvOS](https://img.shields.io/badge/OS-tvOS-orange.svg)](https://developer.apple.com/tvos/)
 [![Coverage Status](https://coveralls.io/repos/github/iwasrobbed/Down/badge.svg?branch=master)](https://coveralls.io/github/iwasrobbed/Down?branch=master)
 
-Blazing fast Markdown (CommonMark) rendering in Swift, built upon [cmark](https://github.com/jgm/cmark).
+Blazing fast Markdown (CommonMark) rendering in Swift, built upon [cmark v0.28.3](https://github.com/commonmark/cmark).
 
 Is your app using it? [Let us know!](mailto:rob@robphillips.me)
 
 #### Maintainers
 
 - [Rob Phillips](https://github.com/iwasrobbed)
+- [John Nguyen](https://github.com/johnxnguyen)
 - [Keaton Burleson](https://github.com/128keaton)
+- [phoney](https://github.com/phoney)
 - [Tony Arnold](https://github.com/tonyarnold)
 - [Ken Harris](https://github.com/kengruven)
-- [Other contributors](https://github.com/iwasrobbed/Down/graphs/contributors) 🙌 
+- [Chris Zielinski](https://github.com/chriszielinski)
+- [Other contributors](https://github.com/iwasrobbed/Down/graphs/contributors) 🙌
 
 ### Installation
 
 Note: Swift 4 support is now on the `master` branch and any tag >= 0.4.x (Swift 3 is 0.3.x)
 
-Quickly install using [CocoaPods](https://cocoapods.org): 
+Quickly install using [CocoaPods](https://cocoapods.org):
 
 ```ruby
 pod 'Down'
@@ -35,7 +38,7 @@ Or [Carthage](https://github.com/Carthage/Carthage):
 ```
 github "iwasrobbed/Down"
 ```
-Due to limitations in Carthage regarding platform specification, you need to define the platform with Carthage. 
+Due to limitations in Carthage regarding platform specification, you need to define the platform with Carthage.
 
 e.g.
 
@@ -51,7 +54,7 @@ Or manually install:
 
 ### Robust Performance
 
->[cmark](https://github.com/jgm/cmark) can render a Markdown version of War and Peace in the blink of an eye (127 milliseconds on a ten year old laptop, vs. 100-400 milliseconds for an eye blink). In our [benchmarks](https://github.com/jgm/cmark/blob/master/benchmarks.md), cmark is 10,000 times faster than the original Markdown.pl, and on par with the very fastest available Markdown processors.
+>[cmark](https://github.com/commonmark/cmark) can render a Markdown version of War and Peace in the blink of an eye (127 milliseconds on a ten year old laptop, vs. 100-400 milliseconds for an eye blink). In our [benchmarks](https://github.com/commonmark/cmark/blob/master/benchmarks.md), cmark is 10,000 times faster than the original Markdown.pl, and on par with the very fastest available Markdown processors.
 
 > The library has been extensively fuzz-tested using [american fuzzy lop](http://lcamtuf.coredump.cx/afl). The test suite includes pathological cases that bring many other Markdown parsers to a crawl (for example, thousands-deep nested bracketed text or block quotes).
 
@@ -71,25 +74,22 @@ The `DownView` class offers a very simple way to parse a UTF-8 encoded string wi
 
 ```swift
 let downView = try? DownView(frame: self.view.bounds, markdownString: "**Oh Hai**") {
-    // Optional callback for loading finished
+// Optional callback for loading finished
 }
 // Now add to view or constrain w/ Autolayout
 // Or you could optionally update the contents at some point:
 try? downView?.update(markdownString:  "## [Google](https://google.com)") {
-    // Optional callback for loading finished
+// Optional callback for loading finished
 }
 ```
 
 Meta example of rendering this README:
 
-![Example gif](https://raw.githubusercontent.com/iwasrobbed/Down/master/Images/ohhai.gif)
-
-##### Prevent zoom
-The default implementation of the `DownView` allows for zooming in the rendered content. If you want to disable this, then you’ll need to instantiate the `DownView` with a custom bundle where the `viewport` in `index.html` has been assigned `user-scalable=no`. More info can be found [here](https://github.com/iwasrobbed/Down/pull/30).
+![Example gif](Images/ohhai.gif)
 
 ### Parsing API
 
-The `Down` struct has everything you need if you just want out-of-the-box setup for parsing and conversion. 
+The `Down` struct has everything you need if you just want out-of-the-box setup for parsing and conversion.
 
 ```swift
 let down = Down(markdownString: "## [Down](https://github.com/iwasrobbed/Down)")
@@ -142,71 +142,82 @@ Example:
 
 ```swift
 public struct MarkdownToHTML: DownHTMLRenderable {
-    /**
-     A string containing CommonMark Markdown
-    */
-    public var markdownString: String
+/**
+A string containing CommonMark Markdown
+*/
+public var markdownString: String
 
-    /**
-     Initializes the container with a CommonMark Markdown string which can then be rendered as HTML using `toHTML()`
+/**
+Initializes the container with a CommonMark Markdown string which can then be rendered as HTML using `toHTML()`
 
-     - parameter markdownString: A string containing CommonMark Markdown
+- parameter markdownString: A string containing CommonMark Markdown
 
-     - returns: An instance of Self
-     */
-    @warn_unused_result
-    public init(markdownString: String) {
-        self.markdownString = markdownString
-    }
+- returns: An instance of Self
+*/
+@warn_unused_result
+public init(markdownString: String) {
+self.markdownString = markdownString
+}
 }
 ```
 
+### Configuration of `DownView`
+
+`DownView` can be configured with a custom bundle using your own HTML / CSS or to do things like supporting
+Dynamic Type or custom fonts, etc. It's completely configurable.
+
+This option can be found in [DownView's instantiation function](https://github.com/iwasrobbed/Down/blob/master/Source/Views/DownView.swift#L26).
+
+##### Prevent zoom
+
+The default implementation of the `DownView` allows for zooming in the rendered content. If you want to disable this, then you’ll need to instantiate the `DownView` with a custom bundle where the `viewport` in `index.html` has been assigned `user-scalable=no`. More info can be found [here](https://github.com/iwasrobbed/Down/pull/30).
+
 ### Options
 
 Each protocol has options that will influence either rendering or parsing:
 
 ```swift
 /**
- Default options
+Default options
 */
 public static let `default` = DownOptions(rawValue: 0)
 
 // MARK: - Rendering Options
 
 /**
- Include a `data-sourcepos` attribute on all block elements
+Include a `data-sourcepos` attribute on all block elements
 */
 public static let sourcePos = DownOptions(rawValue: 1 << 1)
 
 /**
- Render `softbreak` elements as hard line breaks.
+Render `softbreak` elements as hard line breaks.
 */
 public static let hardBreaks = DownOptions(rawValue: 1 << 2)
 
 /**
- Suppress raw HTML and unsafe links (`javascript:`, `vbscript:`,
- `file:`, and `data:`, except for `image/png`, `image/gif`,
- `image/jpeg`, or `image/webp` mime types).  Raw HTML is replaced
- by a placeholder HTML comment. Unsafe links are replaced by
- empty strings.
+Suppress raw HTML and unsafe links (`javascript:`, `vbscript:`,
+`file:`, and `data:`, except for `image/png`, `image/gif`,
+`image/jpeg`, or `image/webp` mime types).  Raw HTML is replaced
+by a placeholder HTML comment. Unsafe links are replaced by
+empty strings.
 */
 public static let safe = DownOptions(rawValue: 1 << 3)
 
 // MARK: - Parsing Options
 
 /**
- Normalize tree by consolidating adjacent text nodes.
+Normalize tree by consolidating adjacent text nodes.
 */
 public static let normalize = DownOptions(rawValue: 1 << 4)
 
 /**
- Validate UTF-8 in the input before parsing, replacing illegal
- sequences with the replacement character U+FFFD.
+Validate UTF-8 in the input before parsing, replacing illegal
+sequences with the replacement character U+FFFD.
 */
 public static let validateUTF8 = DownOptions(rawValue: 1 << 5)
 
 /**
- Convert straight quotes to curly, --- to em dashes, -- to en dashes.
+Convert straight quotes to curly, --- to em dashes, -- to en dashes.
 */
 public static let smart = DownOptions(rawValue: 1 << 6)
 ```
@@ -222,6 +233,6 @@ Down is built upon the [CommonMark](http://commonmark.org) specification.
 Please feel free to fork and create a pull request for bug fixes or improvements, being sure to maintain the general coding style, adding tests, and adding comments as necessary.
 
 ### Credit
-This library is a wrapper around [cmark](https://github.com/jgm/cmark), which is built upon the [CommonMark](http://commonmark.org) Markdown specification. 
+This library is a wrapper around [cmark](https://github.com/commonmark/cmark), which is built upon the [CommonMark](http://commonmark.org) Markdown specification.
 
-[cmark](https://github.com/jgm/cmark) is Copyright (c) 2014 - 2017, John MacFarlane. View [full license](https://github.com/jgm/cmark/blob/master/COPYING).
+[cmark](https://github.com/commonmark/cmark) is Copyright (c) 2014 - 2017, John MacFarlane. View [full license](https://github.com/commonmark/cmark/blob/master/COPYING).

Down-Example/macOS Demo/AppDelegate.swift

@@ -3,22 +3,11 @@
 //  macOS Demo
 //
 //  Created by Chris Zielinski on 10/27/18.
-//  Copyright © 2018 down. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
 import Cocoa
 
 @NSApplicationMain
-class AppDelegate: NSObject, NSApplicationDelegate {
-
-    func applicationDidFinishLaunching(_ aNotification: Notification) {
-        // Insert code here to initialize your application
-    }
-
-    func applicationWillTerminate(_ aNotification: Notification) {
-        // Insert code here to tear down your application
-    }
-
-
-}
+class AppDelegate: NSObject, NSApplicationDelegate {}
 

Down-Example/macOS Demo/Info.plist

@@ -23,7 +23,7 @@
 	<key>LSMinimumSystemVersion</key>
 	<string>$(MACOSX_DEPLOYMENT_TARGET)</string>
 	<key>NSHumanReadableCopyright</key>
-	<string>Copyright © 2018 down. All rights reserved.</string>
+	<string>Copyright © 2016-2019 Down. All rights reserved.</string>
 	<key>NSMainStoryboardFile</key>
 	<string>Main</string>
 	<key>NSPrincipalClass</key>

Down-Example/macOS Demo/ViewController.swift

@@ -3,32 +3,37 @@
 //  macOS Demo
 //
 //  Created by Chris Zielinski on 10/27/18.
-//  Copyright © 2018 down. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
 import Cocoa
 import Down
 
-class ViewController: NSViewController {
-
-    var downView: DownView!
+final class ViewController: NSViewController {
 
     override func viewDidLoad() {
         super.viewDidLoad()
 
+        renderDownInWebView()
+    }
+    
+}
+
+private extension ViewController {
+    
+    func renderDownInWebView() {
         let readMeURL = Bundle.main.url(forResource: nil, withExtension: "md")!
         let readMeContents = try! String(contentsOf: readMeURL)
-
+        
         do {
-            downView = try DownView(frame: view.bounds, markdownString: readMeContents, didLoadSuccessfully: {
+            let downView = try DownView(frame: view.bounds, markdownString: readMeContents, didLoadSuccessfully: {
                 print("Markdown was rendered.")
             })
+            downView.autoresizingMask = [.width, .height]
+            view.addSubview(downView, positioned: .below, relativeTo: nil)
         } catch {
             NSApp.presentError(error)
         }
-
-        downView.autoresizingMask = [.width, .height]
-        view.addSubview(downView, positioned: .below, relativeTo: nil)
     }
 }
 

Down.podspec

@@ -1,23 +1,23 @@
 Pod::Spec.new do |spec|
   spec.name         = "Down"
   spec.summary      = "Blazing fast Markdown rendering in Swift, built upon cmark."
-  spec.version      = "0.6.2"
-  spec.homepage     = "https://github.com/iwasrobbed/Down"
+  spec.version      = "0.11.0"
+  spec.homepage     = "https://github.com/johnxnguyen/Down"
   spec.license      = { :type => "MIT", :file => "LICENSE" }
-  spec.authors      = { "Rob Phillips" => "rob@robphillips.me" }
-  spec.source       = { :git => "https://github.com/iwasrobbed/Down.git", :tag => "v" + spec.version.to_s }
-  spec.source_files = "Source/{cmark,Enums & Options,Extensions,Renderers}/**/*.{h,c,swift}", "Source/*"
-  spec.ios.source_files = "Source/Views/**"
-  spec.osx.source_files = "Source/Views/**"
-  spec.public_header_files = "Source/*.h"
+  spec.authors      = { "John Nguyen" => "polyxo@protonmail.com" }
+  spec.source       = { :git => "https://github.com/johnxnguyen/Down.git", :tag => "v" + spec.version.to_s }
+  spec.source_files = "Sources/Down/{AST,Enums & Options,Extensions,Renderers}/**/*.swift", "Sources/cmark/*.{h,c}", "Sources/Down/*"
+  spec.ios.source_files = "Sources/Down/Views/**"
+  spec.osx.source_files = "Sources/Down/Views/**"
+  spec.public_header_files = "Sources/Down/*.h"
   spec.ios.deployment_target = "9.0"
   spec.tvos.deployment_target = "9.0"
   spec.osx.deployment_target = "10.11"
   spec.requires_arc = true
   spec.module_name = "Down"
-  spec.preserve_paths = "Source/cmark/module.modulemap", "Source/cmark/*.inc", "Source/cmark/COPYING"
-  spec.pod_target_xcconfig = { 'SWIFT_INCLUDE_PATHS' => '$(SRCROOT)/Down/Source/cmark/**' }
-  spec.compiler_flags = '-Wno-shorten-64-to-32'
-  spec.ios.resource = 'Resources/DownView.bundle'
-  spec.osx.resource = 'Resources/DownView.bundle'
+  spec.preserve_paths = "Sources/cmark/include/module.modulemap", "Sources/cmark/*.inc", "Sources/cmark/COPYING"
+  spec.pod_target_xcconfig = { 'SWIFT_INCLUDE_PATHS' => '$(SRCROOT)/Down/Sources/cmark/**' }
+  spec.ios.resource = 'Sources/Down/Resources/DownView.bundle'
+  spec.osx.resource = 'Sources/Down/Resources/DownView.bundle'
+  spec.swift_versions = ['5.0', '5.1']
 end

Down.xcodeproj/project.pbxproj

@@ -3,11 +3,12 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 46;
+	objectVersion = 52;
 	objects = {
 
 /* Begin PBXBuildFile section */
 		14C5E33521877CE900D5380C /* DownView.bundle in Resources */ = {isa = PBXBuildFile; fileRef = D41689B51CFFE6BB00E5802B /* DownView.bundle */; };
+		26CABB93252B4D490032183C /* ChildSequence.swift in Sources */ = {isa = PBXBuildFile; fileRef = 26CABB92252B4D490032183C /* ChildSequence.swift */; };
 		8A569F481E6B3ED2008BE2AC /* DownView.swift in Sources */ = {isa = PBXBuildFile; fileRef = D43AE5D91CFFD0D0006E1522 /* DownView.swift */; };
 		8A569F491E6B3ED9008BE2AC /* blocks.c in Sources */ = {isa = PBXBuildFile; fileRef = D4201EF71CFA5D63008EEC6E /* blocks.c */; settings = {COMPILER_FLAGS = "-w -Xanalyzer -analyzer-disable-all-checks"; }; };
 		8A569F4A1E6B3ED9008BE2AC /* buffer.c in Sources */ = {isa = PBXBuildFile; fileRef = D4201EF81CFA5D63008EEC6E /* buffer.c */; settings = {COMPILER_FLAGS = "-w -Xanalyzer -analyzer-disable-all-checks"; }; };
@@ -21,13 +22,11 @@
 		8A569F521E6B3ED9008BE2AC /* cmark_version.h in Headers */ = {isa = PBXBuildFile; fileRef = D4201F011CFA5D63008EEC6E /* cmark_version.h */; };
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 		8A569F541E6B3ED9008BE2AC /* config.h in Headers */ = {isa = PBXBuildFile; fileRef = D4201F031CFA5D63008EEC6E /* config.h */; };
-		8A569F551E6B3ED9008BE2AC /* debug.h in Headers */ = {isa = PBXBuildFile; fileRef = D4201F041CFA5D63008EEC6E /* debug.h */; };
 		8A569F561E6B3ED9008BE2AC /* houdini.h in Headers */ = {isa = PBXBuildFile; fileRef = D4201F061CFA5D63008EEC6E /* houdini.h */; };
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 		8A569F581E6B3ED9008BE2AC /* houdini_html_e.c in Sources */ = {isa = PBXBuildFile; fileRef = D4201F081CFA5D63008EEC6E /* houdini_html_e.c */; settings = {COMPILER_FLAGS = "-w -Xanalyzer -analyzer-disable-all-checks"; }; };
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 		8A569F5A1E6B3ED9008BE2AC /* html.c in Sources */ = {isa = PBXBuildFile; fileRef = D4201F0A1CFA5D63008EEC6E /* html.c */; settings = {COMPILER_FLAGS = "-w -Xanalyzer -analyzer-disable-all-checks"; }; };
-		8A569F5B1E6B3ED9008BE2AC /* html_unescape.h in Headers */ = {isa = PBXBuildFile; fileRef = D4201F0B1CFA5D63008EEC6E /* html_unescape.h */; };
 		8A569F5C1E6B3ED9008BE2AC /* inlines.c in Sources */ = {isa = PBXBuildFile; fileRef = D4201F0C1CFA5D63008EEC6E /* inlines.c */; settings = {COMPILER_FLAGS = "-w -Xanalyzer -analyzer-disable-all-checks"; }; };
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 		8A569F5E1E6B3ED9008BE2AC /* iterator.c in Sources */ = {isa = PBXBuildFile; fileRef = D4201F0E1CFA5D63008EEC6E /* iterator.c */; settings = {COMPILER_FLAGS = "-w -Xanalyzer -analyzer-disable-all-checks"; }; };
@@ -66,6 +65,74 @@
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 		907C64651EC133780095FEE1 /* TestDownView.bundle in Resources */ = {isa = PBXBuildFile; fileRef = 907C64621EC120530095FEE1 /* TestDownView.bundle */; };
 		90A40A9C1EC03292004F2E91 /* Down.framework in Copy Bundled Frameworks */ = {isa = PBXBuildFile; fileRef = 8A569F401E6B3E50008BE2AC /* Down.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
+		EE0E54F82300800E0070C83F /* BlockBackgroundColorAttribute.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE0E54F72300800E0070C83F /* BlockBackgroundColorAttribute.swift */; };
+		EE3E7E38260400E800170A52 /* DownDebugLayoutManagerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE5D2DF822FC9E89009EC13E /* DownDebugLayoutManagerTests.swift */; };
+		EE3E7E3F260400EE00170A52 /* LinkStyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE5D2DF522FC99A6009EC13E /* LinkStyleTests.swift */; };
+		EE3E7E46260400F100170A52 /* CodeBlockStyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE64722A22F8BB0B00C5F0BA /* CodeBlockStyleTests.swift */; };
+		EE3E7E4D260400F500170A52 /* BlockQuoteStyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA2BDC722F705B900D0C72C /* BlockQuoteStyleTests.swift */; };
+		EE3E7E54260400F900170A52 /* ThematicBreakSyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA5C02A22F58B8000B91D60 /* ThematicBreakSyleTests.swift */; };
+		EE3E7E5B260400FC00170A52 /* HeadingStyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE99E3DD22F0C83F00BCE15B /* HeadingStyleTests.swift */; };
+		EE3E7E622604010000170A52 /* InlineStyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE9E886222EF76040005948C /* InlineStyleTests.swift */; };
+		EE3E7E692604010300170A52 /* ListItemStyleTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE335C4922EDC85900648842 /* ListItemStyleTests.swift */; };
+		EE3E7E702604010700170A52 /* StylerTestSuite.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE59C30122ECF0BD006EE8A8 /* StylerTestSuite.swift */; };
+		EE3E7E812604019300170A52 /* SnapshotTesting in Frameworks */ = {isa = PBXBuildFile; productRef = EE3E7E802604019300170A52 /* SnapshotTesting */; };
+		EE3E7E88260401F000170A52 /* VisitorTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE64FEEF225BEB3900A35B34 /* VisitorTests.swift */; };
+		EE408A39230338B600E5278A /* CGPointTranslateTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A38230338B600E5278A /* CGPointTranslateTests.swift */; };
+		EE408A3B2303399B00E5278A /* CGRectHelpersTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A3A2303399B00E5278A /* CGRectHelpersTests.swift */; };
+		EE408A3D23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE408A3C23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift */; };
+		EE44848B2301E51C0065C836 /* CodeBlockOptions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE44848A2301E51C0065C836 /* CodeBlockOptions.swift */; };
+		EE4484912301F2920065C836 /* CGPoint+Translate.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE4484902301F2920065C836 /* CGPoint+Translate.swift */; };
+		EE4484932301F2DB0065C836 /* CGRect+Helpers.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE4484922301F2DB0065C836 /* CGRect+Helpers.swift */; };
+		EE469B11226CF3B500C0655D /* BaseNode.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE469B10226CF3B500C0655D /* BaseNode.swift */; };
+		EE48C7D922EC9250004815ED /* ParagraphStyleCollection.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE48C7D822EC9250004815ED /* ParagraphStyleCollection.swift */; };
+		EE48C7DB22EC946F004815ED /* ColorCollection.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE48C7DA22EC946F004815ED /* ColorCollection.swift */; };
+		EE4F77C322FF3F170026A983 /* DownStylerConfiguration.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE4F77C222FF3F170026A983 /* DownStylerConfiguration.swift */; };
+		EE5F2BA42262564A00B7C0F3 /* Styler.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE5F2BA32262564A00B7C0F3 /* Styler.swift */; };
+		EE8F38CC22BFB2420056270E /* NodeTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE8F38CB22BFB2420056270E /* NodeTests.swift */; };
+		EE8F38CE22BFEDE50056270E /* ListItemPrefixGenerator.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE8F38CD22BFEDE50056270E /* ListItemPrefixGenerator.swift */; };
+		EE97253E22C130D8004D3B3A /* NSMutableAttributedString+AttributesTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE97253D22C130D8004D3B3A /* NSMutableAttributedString+AttributesTests.swift */; };
+		EE97254322C14B79004D3B3A /* NSAttributedString+HelpersTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = EE97254222C14B79004D3B3A /* NSAttributedString+HelpersTests.swift */; };
+		EEA2BDC422F704F200D0C72C /* QuoteStripeOptions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA2BDC322F704F200D0C72C /* QuoteStripeOptions.swift */; };
+		EEA2BDC622F7057600D0C72C /* ListItemOptions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA2BDC522F7057600D0C72C /* ListItemOptions.swift */; };
+		EEA2BDCA22F7152B00D0C72C /* ThematicBreakOptions.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA2BDC922F7152B00D0C72C /* ThematicBreakOptions.swift */; };
+		EEA5C02922F58A0900B91D60 /* DownTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA5C02822F58A0900B91D60 /* DownTextView.swift */; };
+		EEA5C02D22F5C96B00B91D60 /* QuoteStripeAttribute.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEA5C02C22F5C96B00B91D60 /* QuoteStripeAttribute.swift */; };
+		EEBE62F025E28F3D005CCAD6 /* BundleHelper.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEBE62EF25E28F3D005CCAD6 /* BundleHelper.swift */; };
+		EED7FED825E3133C0033E33A /* DownView (macOS).bundle in Resources */ = {isa = PBXBuildFile; fileRef = 14C5E33621877FCD00D5380C /* DownView (macOS).bundle */; };
+		EED8DA8E22BE404F00E54492 /* DownStyler.swift in Sources */ = {isa = PBXBuildFile; fileRef = EED8DA8D22BE404F00E54492 /* DownStyler.swift */; };
+		EED8DA9022BECBAE00E54492 /* NSAttributedString+Helpers.swift in Sources */ = {isa = PBXBuildFile; fileRef = EED8DA8F22BECBAE00E54492 /* NSAttributedString+Helpers.swift */; };
+		EED8DA9222BECBF200E54492 /* NSMutableAttributedString+Attributes.swift in Sources */ = {isa = PBXBuildFile; fileRef = EED8DA9122BECBF200E54492 /* NSMutableAttributedString+Attributes.swift */; };
+		EED8DA9422BECC2100E54492 /* UIFont+Traits.swift in Sources */ = {isa = PBXBuildFile; fileRef = EED8DA9322BECC2100E54492 /* UIFont+Traits.swift */; };
+		EED8DA9722BECD7500E54492 /* FontCollection.swift in Sources */ = {isa = PBXBuildFile; fileRef = EED8DA9622BECD7500E54492 /* FontCollection.swift */; };
+		EEE2C7F122C2AFEF001B7054 /* ListItemParagraphStyler.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEE2C7F022C2AFEF001B7054 /* ListItemParagraphStyler.swift */; };
+		EEEBEE47225D298D00AE438D /* Document.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE46225D298D00AE438D /* Document.swift */; };
+		EEEBEE49225D29C200AE438D /* BlockQuote.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE48225D29C200AE438D /* BlockQuote.swift */; };
+		EEEBEE4B225D29D800AE438D /* List.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE4A225D29D800AE438D /* List.swift */; };
+		EEEBEE4D225D2A0200AE438D /* Item.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE4C225D2A0200AE438D /* Item.swift */; };
+		EEEBEE4F225D2A1400AE438D /* CodeBlock.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE4E225D2A1400AE438D /* CodeBlock.swift */; };
+		EEEBEE51225D2A2900AE438D /* HtmlBlock.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE50225D2A2900AE438D /* HtmlBlock.swift */; };
+		EEEBEE53225D2A3C00AE438D /* CustomBlock.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE52225D2A3C00AE438D /* CustomBlock.swift */; };
+		EEEBEE55225D2A4E00AE438D /* Paragraph.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE54225D2A4E00AE438D /* Paragraph.swift */; };
+		EEEBEE57225D2A6200AE438D /* Heading.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE56225D2A6200AE438D /* Heading.swift */; };
+		EEEBEE59225D2A7000AE438D /* ThematicBreak.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE58225D2A7000AE438D /* ThematicBreak.swift */; };
+		EEEBEE5B225D2A7E00AE438D /* Text.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE5A225D2A7E00AE438D /* Text.swift */; };
+		EEEBEE5D225D2A8F00AE438D /* SoftBreak.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE5C225D2A8F00AE438D /* SoftBreak.swift */; };
+		EEEBEE5F225D2AA700AE438D /* LineBreak.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE5E225D2AA700AE438D /* LineBreak.swift */; };
+		EEEBEE61225D2AC000AE438D /* Code.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE60225D2AC000AE438D /* Code.swift */; };
+		EEEBEE63225D2AD400AE438D /* HtmlInline.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE62225D2AD400AE438D /* HtmlInline.swift */; };
+		EEEBEE65225D2AE800AE438D /* CustomInline.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE64225D2AE800AE438D /* CustomInline.swift */; };
+		EEEBEE67225D2AF900AE438D /* Emphasis.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE66225D2AF900AE438D /* Emphasis.swift */; };
+		EEEBEE69225D2B1200AE438D /* Strong.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE68225D2B1200AE438D /* Strong.swift */; };
+		EEEBEE6B225D2B2200AE438D /* Link.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE6A225D2B2200AE438D /* Link.swift */; };
+		EEEBEE6D225D2B3200AE438D /* Image.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE6C225D2B3200AE438D /* Image.swift */; };
+		EEEBEE70225D2B9D00AE438D /* DebugVisitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE6F225D2B9D00AE438D /* DebugVisitor.swift */; };
+		EEEBEE72225D2F9200AE438D /* AttributedStringVisitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEEBEE71225D2F9200AE438D /* AttributedStringVisitor.swift */; };
+		EEF1376F2259E53400D7DDE0 /* Node.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEF1376E2259E53400D7DDE0 /* Node.swift */; };
+		EEF137712259E7E700D7DDE0 /* Visitor.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEF137702259E7E700D7DDE0 /* Visitor.swift */; };
+		EEF8580F22FA101C0025370B /* DownDebugLayoutManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEF8580E22FA101C0025370B /* DownDebugLayoutManager.swift */; };
+		EEF8581122FA11690025370B /* DownDebugTextView.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEF8581022FA11690025370B /* DownDebugTextView.swift */; };
+		EEFFFDDB22F4C36800036FD5 /* ThematicBreakAttribute.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFFFDDA22F4C36800036FD5 /* ThematicBreakAttribute.swift */; };
+		EEFFFDDD22F4C8AB00036FD5 /* DownLayoutManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = EEFFFDDC22F4C8AB00036FD5 /* DownLayoutManager.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXBuildRule section */
@@ -74,6 +141,8 @@
 			compilerSpec = com.apple.compilers.pbxcp;
 			filePatterns = "*.inc";
 			fileType = pattern.proxy;
+			inputFiles = (
+			);
 			isEditable = 1;
 			outputFiles = (
 			);
@@ -84,6 +153,8 @@
 			compilerSpec = com.apple.compilers.pbxcp;
 			filePatterns = "*COPYING";
 			fileType = pattern.proxy;
+			inputFiles = (
+			);
 			isEditable = 1;
 			outputFiles = (
 			);
@@ -94,6 +165,8 @@
 			compilerSpec = com.apple.compilers.pbxcp;
 			filePatterns = "*.modulemap";
 			fileType = pattern.proxy;
+			inputFiles = (
+			);
 			isEditable = 1;
 			outputFiles = (
 			);
@@ -127,8 +200,10 @@
 
 /* Begin PBXFileReference section */
 		14C5E33621877FCD00D5380C /* DownView (macOS).bundle */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.plug-in"; path = "DownView (macOS).bundle"; sourceTree = "<group>"; };
+		26CABB92252B4D490032183C /* ChildSequence.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ChildSequence.swift; sourceTree = "<group>"; };
 		8A569F401E6B3E50008BE2AC /* Down.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Down.framework; sourceTree = BUILT_PRODUCTS_DIR; };
 		8AFAEAFB1E6E32E900E09B68 /* DownTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = DownTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		8C73B9B522A687C400C8E60F /* module.modulemap */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = "sourcecode.module-map"; path = module.modulemap; sourceTree = "<group>"; };
 		907C64621EC120530095FEE1 /* TestDownView.bundle */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.plug-in"; path = TestDownView.bundle; sourceTree = "<group>"; };
 		90A40A951EC02FF6004F2E91 /* Down-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "Down-Info.plist"; sourceTree = "<group>"; };
 		90A40A961EC02FF6004F2E91 /* DownTests-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "DownTests-Info.plist"; sourceTree = "<group>"; };
@@ -151,13 +226,11 @@
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 		D4201F021CFA5D63008EEC6E /* commonmark.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = commonmark.c; sourceTree = "<group>"; };
 		D4201F031CFA5D63008EEC6E /* config.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = config.h; sourceTree = "<group>"; };
-		D4201F041CFA5D63008EEC6E /* debug.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = debug.h; sourceTree = "<group>"; };
 		D4201F061CFA5D63008EEC6E /* houdini.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = houdini.h; sourceTree = "<group>"; };
 		D4201F071CFA5D63008EEC6E /* houdini_href_e.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = houdini_href_e.c; sourceTree = "<group>"; };
 		D4201F081CFA5D63008EEC6E /* houdini_html_e.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = houdini_html_e.c; sourceTree = "<group>"; };
 		D4201F091CFA5D63008EEC6E /* houdini_html_u.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = houdini_html_u.c; sourceTree = "<group>"; };
 		D4201F0A1CFA5D63008EEC6E /* html.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = html.c; sourceTree = "<group>"; };
-		D4201F0B1CFA5D63008EEC6E /* html_unescape.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = html_unescape.h; sourceTree = "<group>"; };
 		D4201F0C1CFA5D63008EEC6E /* inlines.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = inlines.c; sourceTree = "<group>"; };
 		D4201F0D1CFA5D63008EEC6E /* inlines.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = inlines.h; sourceTree = "<group>"; };
 		D4201F0E1CFA5D63008EEC6E /* iterator.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = iterator.c; sourceTree = "<group>"; };
@@ -176,7 +249,6 @@
 		D4201F1C1CFA5D63008EEC6E /* utf8.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = utf8.c; sourceTree = "<group>"; };
 		D4201F1D1CFA5D63008EEC6E /* utf8.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = utf8.h; sourceTree = "<group>"; };
 		D4201F1E1CFA5D63008EEC6E /* xml.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = xml.c; sourceTree = "<group>"; };
-		D42869501CFF501200FACB4C /* module.modulemap */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = "sourcecode.module-map"; path = module.modulemap; sourceTree = "<group>"; };
 		D438696B1D00D27700E95A1F /* StringTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = StringTests.swift; sourceTree = "<group>"; };
 		D43AE5C91CFFAE4D006E1522 /* NSAttributedString+HTML.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "NSAttributedString+HTML.swift"; sourceTree = "<group>"; };
 		D43AE5D91CFFD0D0006E1522 /* DownView.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DownView.swift; sourceTree = "<group>"; };
@@ -193,6 +265,74 @@
 		D4CF88971CFFAC2C00F07FD1 /* DownAttributedStringRenderable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DownAttributedStringRenderable.swift; sourceTree = "<group>"; };
 		D4DC91131CFDED4B0091CE09 /* DownCommonMarkRenderable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DownCommonMarkRenderable.swift; sourceTree = "<group>"; };
 		D4F948DB1D00A4A800C9C0F6 /* NSAttributedStringTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = NSAttributedStringTests.swift; sourceTree = "<group>"; };
+		EE0E54F72300800E0070C83F /* BlockBackgroundColorAttribute.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BlockBackgroundColorAttribute.swift; sourceTree = "<group>"; };
+		EE335C4922EDC85900648842 /* ListItemStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemStyleTests.swift; sourceTree = "<group>"; };
+		EE39B28026063E0D002C4F8D /* .swiftlint.yml */ = {isa = PBXFileReference; lastKnownFileType = text.yaml; path = .swiftlint.yml; sourceTree = "<group>"; };
+		EE408A38230338B600E5278A /* CGPointTranslateTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CGPointTranslateTests.swift; sourceTree = "<group>"; };
+		EE408A3A2303399B00E5278A /* CGRectHelpersTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CGRectHelpersTests.swift; sourceTree = "<group>"; };
+		EE408A3C23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemPrefixGeneratorTests.swift; sourceTree = "<group>"; };
+		EE44848A2301E51C0065C836 /* CodeBlockOptions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CodeBlockOptions.swift; sourceTree = "<group>"; };
+		EE4484902301F2920065C836 /* CGPoint+Translate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "CGPoint+Translate.swift"; sourceTree = "<group>"; };
+		EE4484922301F2DB0065C836 /* CGRect+Helpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "CGRect+Helpers.swift"; sourceTree = "<group>"; };
+		EE469B10226CF3B500C0655D /* BaseNode.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BaseNode.swift; sourceTree = "<group>"; };
+		EE48C7D822EC9250004815ED /* ParagraphStyleCollection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ParagraphStyleCollection.swift; sourceTree = "<group>"; };
+		EE48C7DA22EC946F004815ED /* ColorCollection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ColorCollection.swift; sourceTree = "<group>"; };
+		EE4F77C222FF3F170026A983 /* DownStylerConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownStylerConfiguration.swift; sourceTree = "<group>"; };
+		EE54F96E22EB9CE500628683 /* SnapshotTesting.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = SnapshotTesting.framework; path = Carthage/Build/iOS/SnapshotTesting.framework; sourceTree = "<group>"; };
+		EE59C30122ECF0BD006EE8A8 /* StylerTestSuite.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = StylerTestSuite.swift; sourceTree = "<group>"; };
+		EE5D2DF522FC99A6009EC13E /* LinkStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LinkStyleTests.swift; sourceTree = "<group>"; };
+		EE5D2DF822FC9E89009EC13E /* DownDebugLayoutManagerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownDebugLayoutManagerTests.swift; sourceTree = "<group>"; };
+		EE5F2BA32262564A00B7C0F3 /* Styler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Styler.swift; sourceTree = "<group>"; };
+		EE64722A22F8BB0B00C5F0BA /* CodeBlockStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CodeBlockStyleTests.swift; sourceTree = "<group>"; };
+		EE64FEEF225BEB3900A35B34 /* VisitorTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VisitorTests.swift; sourceTree = "<group>"; };
+		EE8F38CB22BFB2420056270E /* NodeTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NodeTests.swift; sourceTree = "<group>"; };
+		EE8F38CD22BFEDE50056270E /* ListItemPrefixGenerator.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemPrefixGenerator.swift; sourceTree = "<group>"; };
+		EE97253D22C130D8004D3B3A /* NSMutableAttributedString+AttributesTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSMutableAttributedString+AttributesTests.swift"; sourceTree = "<group>"; };
+		EE97254222C14B79004D3B3A /* NSAttributedString+HelpersTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSAttributedString+HelpersTests.swift"; sourceTree = "<group>"; };
+		EE99E3DD22F0C83F00BCE15B /* HeadingStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HeadingStyleTests.swift; sourceTree = "<group>"; };
+		EE9E886222EF76040005948C /* InlineStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = InlineStyleTests.swift; sourceTree = "<group>"; };
+		EEA2BDC322F704F200D0C72C /* QuoteStripeOptions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QuoteStripeOptions.swift; sourceTree = "<group>"; };
+		EEA2BDC522F7057600D0C72C /* ListItemOptions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemOptions.swift; sourceTree = "<group>"; };
+		EEA2BDC722F705B900D0C72C /* BlockQuoteStyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BlockQuoteStyleTests.swift; sourceTree = "<group>"; };
+		EEA2BDC922F7152B00D0C72C /* ThematicBreakOptions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThematicBreakOptions.swift; sourceTree = "<group>"; };
+		EEA5C02822F58A0900B91D60 /* DownTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownTextView.swift; sourceTree = "<group>"; };
+		EEA5C02A22F58B8000B91D60 /* ThematicBreakSyleTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThematicBreakSyleTests.swift; sourceTree = "<group>"; };
+		EEA5C02C22F5C96B00B91D60 /* QuoteStripeAttribute.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = QuoteStripeAttribute.swift; sourceTree = "<group>"; };
+		EEBE62EF25E28F3D005CCAD6 /* BundleHelper.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BundleHelper.swift; sourceTree = "<group>"; };
+		EED8DA8D22BE404F00E54492 /* DownStyler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownStyler.swift; sourceTree = "<group>"; };
+		EED8DA8F22BECBAE00E54492 /* NSAttributedString+Helpers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSAttributedString+Helpers.swift"; sourceTree = "<group>"; };
+		EED8DA9122BECBF200E54492 /* NSMutableAttributedString+Attributes.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "NSMutableAttributedString+Attributes.swift"; sourceTree = "<group>"; };
+		EED8DA9322BECC2100E54492 /* UIFont+Traits.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIFont+Traits.swift"; sourceTree = "<group>"; };
+		EED8DA9622BECD7500E54492 /* FontCollection.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FontCollection.swift; sourceTree = "<group>"; };
+		EEE2C7F022C2AFEF001B7054 /* ListItemParagraphStyler.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ListItemParagraphStyler.swift; sourceTree = "<group>"; };
+		EEEBEE46225D298D00AE438D /* Document.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Document.swift; sourceTree = "<group>"; };
+		EEEBEE48225D29C200AE438D /* BlockQuote.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BlockQuote.swift; sourceTree = "<group>"; };
+		EEEBEE4A225D29D800AE438D /* List.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = List.swift; sourceTree = "<group>"; };
+		EEEBEE4C225D2A0200AE438D /* Item.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Item.swift; sourceTree = "<group>"; };
+		EEEBEE4E225D2A1400AE438D /* CodeBlock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CodeBlock.swift; sourceTree = "<group>"; };
+		EEEBEE50225D2A2900AE438D /* HtmlBlock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HtmlBlock.swift; sourceTree = "<group>"; };
+		EEEBEE52225D2A3C00AE438D /* CustomBlock.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CustomBlock.swift; sourceTree = "<group>"; };
+		EEEBEE54225D2A4E00AE438D /* Paragraph.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Paragraph.swift; sourceTree = "<group>"; };
+		EEEBEE56225D2A6200AE438D /* Heading.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Heading.swift; sourceTree = "<group>"; };
+		EEEBEE58225D2A7000AE438D /* ThematicBreak.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThematicBreak.swift; sourceTree = "<group>"; };
+		EEEBEE5A225D2A7E00AE438D /* Text.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Text.swift; sourceTree = "<group>"; };
+		EEEBEE5C225D2A8F00AE438D /* SoftBreak.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = SoftBreak.swift; sourceTree = "<group>"; };
+		EEEBEE5E225D2AA700AE438D /* LineBreak.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = LineBreak.swift; sourceTree = "<group>"; };
+		EEEBEE60225D2AC000AE438D /* Code.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Code.swift; sourceTree = "<group>"; };
+		EEEBEE62225D2AD400AE438D /* HtmlInline.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HtmlInline.swift; sourceTree = "<group>"; };
+		EEEBEE64225D2AE800AE438D /* CustomInline.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CustomInline.swift; sourceTree = "<group>"; };
+		EEEBEE66225D2AF900AE438D /* Emphasis.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Emphasis.swift; sourceTree = "<group>"; };
+		EEEBEE68225D2B1200AE438D /* Strong.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Strong.swift; sourceTree = "<group>"; };
+		EEEBEE6A225D2B2200AE438D /* Link.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Link.swift; sourceTree = "<group>"; };
+		EEEBEE6C225D2B3200AE438D /* Image.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Image.swift; sourceTree = "<group>"; };
+		EEEBEE6F225D2B9D00AE438D /* DebugVisitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DebugVisitor.swift; sourceTree = "<group>"; };
+		EEEBEE71225D2F9200AE438D /* AttributedStringVisitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AttributedStringVisitor.swift; sourceTree = "<group>"; };
+		EEF1376E2259E53400D7DDE0 /* Node.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Node.swift; sourceTree = "<group>"; };
+		EEF137702259E7E700D7DDE0 /* Visitor.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Visitor.swift; sourceTree = "<group>"; };
+		EEF8580E22FA101C0025370B /* DownDebugLayoutManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownDebugLayoutManager.swift; sourceTree = "<group>"; };
+		EEF8581022FA11690025370B /* DownDebugTextView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownDebugTextView.swift; sourceTree = "<group>"; };
+		EEFFFDDA22F4C36800036FD5 /* ThematicBreakAttribute.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ThematicBreakAttribute.swift; sourceTree = "<group>"; };
+		EEFFFDDC22F4C8AB00036FD5 /* DownLayoutManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = DownLayoutManager.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -201,12 +341,21 @@
 			buildActionMask = 2147483647;
 			files = (
 				8AFAEB001E6E32E900E09B68 /* Down.framework in Frameworks */,
+				EE3E7E812604019300170A52 /* SnapshotTesting in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		8C73B9B422A687C400C8E60F /* include */ = {
+			isa = PBXGroup;
+			children = (
+				8C73B9B522A687C400C8E60F /* module.modulemap */,
+			);
+			path = include;
+			sourceTree = "<group>";
+		};
 		907C64611EC120530095FEE1 /* Fixtures */ = {
 			isa = PBXGroup;
 			children = (
@@ -225,25 +374,25 @@
 			path = Configurations;
 			sourceTree = "<group>";
 		};
-		D41689B41CFFE6BB00E5802B /* Resources */ = {
+		D41689B41CFFE6BB00E5802B /* Supporting Files */ = {
 			isa = PBXGroup;
 			children = (
 				90A40A971EC0309A004F2E91 /* Configurations */,
 				90A40A951EC02FF6004F2E91 /* Down-Info.plist */,
 				90A40A961EC02FF6004F2E91 /* DownTests-Info.plist */,
-				D41689B51CFFE6BB00E5802B /* DownView.bundle */,
-				14C5E33621877FCD00D5380C /* DownView (macOS).bundle */,
 			);
-			path = Resources;
+			path = "Supporting Files";
 			sourceTree = "<group>";
 		};
 		D4201E761CFA5151008EEC6E = {
 			isa = PBXGroup;
 			children = (
-				D4201E9B1CFA59A5008EEC6E /* Source */,
-				D41689B41CFFE6BB00E5802B /* Resources */,
+				EE39B28026063E0D002C4F8D /* .swiftlint.yml */,
+				D4201E9B1CFA59A5008EEC6E /* Sources */,
+				D41689B41CFFE6BB00E5802B /* Supporting Files */,
 				D4201EC41CFA59A5008EEC6E /* Tests */,
 				D4201E811CFA5151008EEC6E /* Products */,
+				EE54F96D22EB9CE400628683 /* Frameworks */,
 			);
 			indentWidth = 4;
 			sourceTree = "<group>";
@@ -258,28 +407,19 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
-		D4201E9B1CFA59A5008EEC6E /* Source */ = {
+		D4201E9B1CFA59A5008EEC6E /* Sources */ = {
 			isa = PBXGroup;
 			children = (
-				D4CF88961CFF94B300F07FD1 /* Down.h */,
-				D4201EF01CFA59F2008EEC6E /* Down.swift */,
-				D44875E71CFA6CF30037A624 /* Enums & Options */,
-				D43AE5C81CFFAE39006E1522 /* Extensions */,
-				D44875E21CFA6B120037A624 /* Renderers */,
-				D43AE5CB1CFFD068006E1522 /* Views */,
+				EED7D92025C6DA4300E52D18 /* Down */,
 				D4201EF61CFA5D63008EEC6E /* cmark */,
 			);
-			path = Source;
+			path = Sources;
 			sourceTree = "<group>";
 		};
 		D4201EC41CFA59A5008EEC6E /* Tests */ = {
 			isa = PBXGroup;
 			children = (
-				D4201EC51CFA59A5008EEC6E /* BindingTests.swift */,
-				D41689B21CFFE28200E5802B /* DownViewTests.swift */,
-				907C64611EC120530095FEE1 /* Fixtures */,
-				D4F948DB1D00A4A800C9C0F6 /* NSAttributedStringTests.swift */,
-				D438696B1D00D27700E95A1F /* StringTests.swift */,
+				EED7D92725C6DB9100E52D18 /* DownTests */,
 			);
 			path = Tests;
 			sourceTree = "<group>";
@@ -287,6 +427,7 @@
 		D4201EF61CFA5D63008EEC6E /* cmark */ = {
 			isa = PBXGroup;
 			children = (
+				8C73B9B422A687C400C8E60F /* include */,
 				D4201EF71CFA5D63008EEC6E /* blocks.c */,
 				D4201EF81CFA5D63008EEC6E /* buffer.c */,
 				D4201EF91CFA5D63008EEC6E /* buffer.h */,
@@ -299,20 +440,17 @@
 				D4201F011CFA5D63008EEC6E /* cmark_version.h */,
 				D4201F021CFA5D63008EEC6E /* commonmark.c */,
 				D4201F031CFA5D63008EEC6E /* config.h */,
-				D4201F041CFA5D63008EEC6E /* debug.h */,
 				D4201F061CFA5D63008EEC6E /* houdini.h */,
 				D4201F071CFA5D63008EEC6E /* houdini_href_e.c */,
 				D4201F081CFA5D63008EEC6E /* houdini_html_e.c */,
 				D4201F091CFA5D63008EEC6E /* houdini_html_u.c */,
 				D4201F0A1CFA5D63008EEC6E /* html.c */,
-				D4201F0B1CFA5D63008EEC6E /* html_unescape.h */,
 				D4201F0C1CFA5D63008EEC6E /* inlines.c */,
 				D4201F0D1CFA5D63008EEC6E /* inlines.h */,
 				D4201F0E1CFA5D63008EEC6E /* iterator.c */,
 				D4201F0F1CFA5D63008EEC6E /* iterator.h */,
 				D4201F101CFA5D63008EEC6E /* latex.c */,
 				D4201F111CFA5D63008EEC6E /* man.c */,
-				D42869501CFF501200FACB4C /* module.modulemap */,
 				D4201F131CFA5D63008EEC6E /* node.c */,
 				D4201F141CFA5D63008EEC6E /* node.h */,
 				D4201F151CFA5D63008EEC6E /* parser.h */,
@@ -342,6 +480,7 @@
 			isa = PBXGroup;
 			children = (
 				D43AE5D91CFFD0D0006E1522 /* DownView.swift */,
+				EEBE62EF25E28F3D005CCAD6 /* BundleHelper.swift */,
 			);
 			path = Views;
 			sourceTree = "<group>";
@@ -355,8 +494,8 @@
 				D486E9991CFDE28B0059FD7C /* DownGroffRenderable.swift */,
 				D44875E51CFA6B660037A624 /* DownHTMLRenderable.swift */,
 				D486E9971CFDE2730059FD7C /* DownLaTeXRenderable.swift */,
-				D486E9931CFDD33C0059FD7C /* DownXMLRenderable.swift */,
 				D44875E31CFA6B200037A624 /* DownRenderable.swift */,
+				D486E9931CFDD33C0059FD7C /* DownXMLRenderable.swift */,
 			);
 			path = Renderers;
 			sourceTree = "<group>";
@@ -370,6 +509,235 @@
 			path = "Enums & Options";
 			sourceTree = "<group>";
 		};
+		EE408A3E23033DFE00E5278A /* Helpers */ = {
+			isa = PBXGroup;
+			children = (
+				EE408A3A2303399B00E5278A /* CGRectHelpersTests.swift */,
+				EE408A38230338B600E5278A /* CGPointTranslateTests.swift */,
+				EE97254222C14B79004D3B3A /* NSAttributedString+HelpersTests.swift */,
+				EE97253D22C130D8004D3B3A /* NSMutableAttributedString+AttributesTests.swift */,
+			);
+			path = Helpers;
+			sourceTree = "<group>";
+		};
+		EE48C7DE22EC99F3004815ED /* Attribute Collections */ = {
+			isa = PBXGroup;
+			children = (
+				EED8DA9622BECD7500E54492 /* FontCollection.swift */,
+				EE48C7DA22EC946F004815ED /* ColorCollection.swift */,
+				EE48C7D822EC9250004815ED /* ParagraphStyleCollection.swift */,
+			);
+			path = "Attribute Collections";
+			sourceTree = "<group>";
+		};
+		EE48C7DF22EC9A4D004815ED /* Extensions */ = {
+			isa = PBXGroup;
+			children = (
+				EED8DA9322BECC2100E54492 /* UIFont+Traits.swift */,
+				EED8DA8F22BECBAE00E54492 /* NSAttributedString+Helpers.swift */,
+				EED8DA9122BECBF200E54492 /* NSMutableAttributedString+Attributes.swift */,
+				EE4484902301F2920065C836 /* CGPoint+Translate.swift */,
+				EE4484922301F2DB0065C836 /* CGRect+Helpers.swift */,
+			);
+			path = Extensions;
+			sourceTree = "<group>";
+		};
+		EE54F96D22EB9CE400628683 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				EE54F96E22EB9CE500628683 /* SnapshotTesting.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		EE59C30022ECF08E006EE8A8 /* Styler */ = {
+			isa = PBXGroup;
+			children = (
+				EE408A3E23033DFE00E5278A /* Helpers */,
+				EE5D2DF822FC9E89009EC13E /* DownDebugLayoutManagerTests.swift */,
+				EE5D2DF522FC99A6009EC13E /* LinkStyleTests.swift */,
+				EE64722A22F8BB0B00C5F0BA /* CodeBlockStyleTests.swift */,
+				EEA2BDC722F705B900D0C72C /* BlockQuoteStyleTests.swift */,
+				EEA5C02A22F58B8000B91D60 /* ThematicBreakSyleTests.swift */,
+				EE99E3DD22F0C83F00BCE15B /* HeadingStyleTests.swift */,
+				EE9E886222EF76040005948C /* InlineStyleTests.swift */,
+				EE335C4922EDC85900648842 /* ListItemStyleTests.swift */,
+				EE59C30122ECF0BD006EE8A8 /* StylerTestSuite.swift */,
+			);
+			path = Styler;
+			sourceTree = "<group>";
+		};
+		EE5D2DF722FC9D98009EC13E /* Options */ = {
+			isa = PBXGroup;
+			children = (
+				EEA2BDC922F7152B00D0C72C /* ThematicBreakOptions.swift */,
+				EEA2BDC322F704F200D0C72C /* QuoteStripeOptions.swift */,
+				EEA2BDC522F7057600D0C72C /* ListItemOptions.swift */,
+				EE44848A2301E51C0065C836 /* CodeBlockOptions.swift */,
+			);
+			path = Options;
+			sourceTree = "<group>";
+		};
+		EE5D2DFA22FCA92F009EC13E /* Stylers */ = {
+			isa = PBXGroup;
+			children = (
+				EE5F2BA32262564A00B7C0F3 /* Styler.swift */,
+				EED8DA8D22BE404F00E54492 /* DownStyler.swift */,
+				EE4F77C222FF3F170026A983 /* DownStylerConfiguration.swift */,
+			);
+			path = Stylers;
+			sourceTree = "<group>";
+		};
+		EE5D2DFB22FCA946009EC13E /* Layout Managers */ = {
+			isa = PBXGroup;
+			children = (
+				EEFFFDDC22F4C8AB00036FD5 /* DownLayoutManager.swift */,
+				EEF8580E22FA101C0025370B /* DownDebugLayoutManager.swift */,
+			);
+			path = "Layout Managers";
+			sourceTree = "<group>";
+		};
+		EE5D2DFC22FCA953009EC13E /* Text Views */ = {
+			isa = PBXGroup;
+			children = (
+				EEA5C02822F58A0900B91D60 /* DownTextView.swift */,
+				EEF8581022FA11690025370B /* DownDebugTextView.swift */,
+			);
+			path = "Text Views";
+			sourceTree = "<group>";
+		};
+		EE5F2BA22262562F00B7C0F3 /* Styling */ = {
+			isa = PBXGroup;
+			children = (
+				EE5D2DFA22FCA92F009EC13E /* Stylers */,
+				EEFFFDD922F4C35000036FD5 /* Custom Attributes */,
+				EE5D2DFB22FCA946009EC13E /* Layout Managers */,
+				EE5D2DFC22FCA953009EC13E /* Text Views */,
+				EE48C7DE22EC99F3004815ED /* Attribute Collections */,
+				EE5D2DF722FC9D98009EC13E /* Options */,
+				EED8DA9522BECCF000E54492 /* Helpers */,
+			);
+			path = Styling;
+			sourceTree = "<group>";
+		};
+		EEC752BE22C4AE1300EC729C /* AST */ = {
+			isa = PBXGroup;
+			children = (
+				EE8F38CB22BFB2420056270E /* NodeTests.swift */,
+				EE64FEEF225BEB3900A35B34 /* VisitorTests.swift */,
+				EE408A3C23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift */,
+			);
+			path = AST;
+			sourceTree = "<group>";
+		};
+		EED7D92025C6DA4300E52D18 /* Down */ = {
+			isa = PBXGroup;
+			children = (
+				EED7D94425C6DF2D00E52D18 /* Resources */,
+				D4CF88961CFF94B300F07FD1 /* Down.h */,
+				D4201EF01CFA59F2008EEC6E /* Down.swift */,
+				EEF1376D2259E4BA00D7DDE0 /* AST */,
+				D44875E71CFA6CF30037A624 /* Enums & Options */,
+				D43AE5C81CFFAE39006E1522 /* Extensions */,
+				D44875E21CFA6B120037A624 /* Renderers */,
+				D43AE5CB1CFFD068006E1522 /* Views */,
+			);
+			path = Down;
+			sourceTree = "<group>";
+		};
+		EED7D92725C6DB9100E52D18 /* DownTests */ = {
+			isa = PBXGroup;
+			children = (
+				EE59C30022ECF08E006EE8A8 /* Styler */,
+				907C64611EC120530095FEE1 /* Fixtures */,
+				D4201EC51CFA59A5008EEC6E /* BindingTests.swift */,
+				D41689B21CFFE28200E5802B /* DownViewTests.swift */,
+				D4F948DB1D00A4A800C9C0F6 /* NSAttributedStringTests.swift */,
+				D438696B1D00D27700E95A1F /* StringTests.swift */,
+				EEC752BE22C4AE1300EC729C /* AST */,
+			);
+			path = DownTests;
+			sourceTree = "<group>";
+		};
+		EED7D94425C6DF2D00E52D18 /* Resources */ = {
+			isa = PBXGroup;
+			children = (
+				D41689B51CFFE6BB00E5802B /* DownView.bundle */,
+				14C5E33621877FCD00D5380C /* DownView (macOS).bundle */,
+			);
+			path = Resources;
+			sourceTree = "<group>";
+		};
+		EED8DA9522BECCF000E54492 /* Helpers */ = {
+			isa = PBXGroup;
+			children = (
+				EEE2C7F022C2AFEF001B7054 /* ListItemParagraphStyler.swift */,
+				EE48C7DF22EC9A4D004815ED /* Extensions */,
+			);
+			path = Helpers;
+			sourceTree = "<group>";
+		};
+		EEEBEE45225D297700AE438D /* Nodes */ = {
+			isa = PBXGroup;
+			children = (
+				EE469B10226CF3B500C0655D /* BaseNode.swift */,
+				EEEBEE48225D29C200AE438D /* BlockQuote.swift */,
+				EEEBEE60225D2AC000AE438D /* Code.swift */,
+				EEEBEE4E225D2A1400AE438D /* CodeBlock.swift */,
+				EEEBEE52225D2A3C00AE438D /* CustomBlock.swift */,
+				EEEBEE64225D2AE800AE438D /* CustomInline.swift */,
+				EEEBEE46225D298D00AE438D /* Document.swift */,
+				EEEBEE66225D2AF900AE438D /* Emphasis.swift */,
+				EEEBEE56225D2A6200AE438D /* Heading.swift */,
+				EEEBEE50225D2A2900AE438D /* HtmlBlock.swift */,
+				EEEBEE62225D2AD400AE438D /* HtmlInline.swift */,
+				EEEBEE6C225D2B3200AE438D /* Image.swift */,
+				EEEBEE4C225D2A0200AE438D /* Item.swift */,
+				EEEBEE5E225D2AA700AE438D /* LineBreak.swift */,
+				EEEBEE6A225D2B2200AE438D /* Link.swift */,
+				EEEBEE4A225D29D800AE438D /* List.swift */,
+				EEF1376E2259E53400D7DDE0 /* Node.swift */,
+				EEEBEE54225D2A4E00AE438D /* Paragraph.swift */,
+				EEEBEE5C225D2A8F00AE438D /* SoftBreak.swift */,
+				EEEBEE68225D2B1200AE438D /* Strong.swift */,
+				EEEBEE5A225D2A7E00AE438D /* Text.swift */,
+				EEEBEE58225D2A7000AE438D /* ThematicBreak.swift */,
+				26CABB92252B4D490032183C /* ChildSequence.swift */,
+			);
+			path = Nodes;
+			sourceTree = "<group>";
+		};
+		EEEBEE6E225D2B8200AE438D /* Visitors */ = {
+			isa = PBXGroup;
+			children = (
+				EEEBEE71225D2F9200AE438D /* AttributedStringVisitor.swift */,
+				EE8F38CD22BFEDE50056270E /* ListItemPrefixGenerator.swift */,
+				EEEBEE6F225D2B9D00AE438D /* DebugVisitor.swift */,
+				EEF137702259E7E700D7DDE0 /* Visitor.swift */,
+			);
+			path = Visitors;
+			sourceTree = "<group>";
+		};
+		EEF1376D2259E4BA00D7DDE0 /* AST */ = {
+			isa = PBXGroup;
+			children = (
+				EEEBEE45225D297700AE438D /* Nodes */,
+				EEEBEE6E225D2B8200AE438D /* Visitors */,
+				EE5F2BA22262562F00B7C0F3 /* Styling */,
+			);
+			path = AST;
+			sourceTree = "<group>";
+		};
+		EEFFFDD922F4C35000036FD5 /* Custom Attributes */ = {
+			isa = PBXGroup;
+			children = (
+				EEFFFDDA22F4C36800036FD5 /* ThematicBreakAttribute.swift */,
+				EEA5C02C22F5C96B00B91D60 /* QuoteStripeAttribute.swift */,
+				EE0E54F72300800E0070C83F /* BlockBackgroundColorAttribute.swift */,
+			);
+			path = "Custom Attributes";
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -377,7 +745,6 @@
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				8A569F551E6B3ED9008BE2AC /* debug.h in Headers */,
 				8A569F4C1E6B3ED9008BE2AC /* chunk.h in Headers */,
 				8A569F631E6B3ED9008BE2AC /* node.h in Headers */,
 				8A569F521E6B3ED9008BE2AC /* cmark_version.h in Headers */,
@@ -394,7 +761,6 @@
 				8A569F511E6B3ED9008BE2AC /* cmark_export.h in Headers */,
 				8A569F4E1E6B3ED9008BE2AC /* cmark.h in Headers */,
 				8A569F501E6B3ED9008BE2AC /* cmark_ctype.h in Headers */,
-				8A569F5B1E6B3ED9008BE2AC /* html_unescape.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -409,6 +775,7 @@
 				8A569F3D1E6B3E50008BE2AC /* Headers */,
 				14C5E33421877CDC00D5380C /* Resources */,
 				14CEAC38218774BC00039EDF /* Replace Bundle for macOS Platform */,
+				EED185ED26054F800051E616 /* Swiftlint */,
 			);
 			buildRules = (
 				8AE66BE41F848C3900ED4C98 /* PBXBuildRule */,
@@ -437,6 +804,9 @@
 				8AFAEB021E6E32E900E09B68 /* PBXTargetDependency */,
 			);
 			name = DownTests;
+			packageProductDependencies = (
+				EE3E7E802604019300170A52 /* SnapshotTesting */,
+			);
 			productName = "DownTests-macOS";
 			productReference = 8AFAEAFB1E6E32E900E09B68 /* DownTests.xctest */;
 			productType = "com.apple.product-type.bundle.unit-test";
@@ -447,30 +817,34 @@
 		D4201E771CFA5151008EEC6E /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastSwiftUpdateCheck = 0820;
-				LastUpgradeCheck = 1010;
-				ORGANIZATIONNAME = "Glazed Donut, LLC.";
+				LastSwiftUpdateCheck = 1100;
+				LastUpgradeCheck = 1020;
+				ORGANIZATIONNAME = Down;
 				TargetAttributes = {
 					8A569F3F1E6B3E50008BE2AC = {
 						CreatedOnToolsVersion = 8.2.1;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1020;
 						ProvisioningStyle = Automatic;
 					};
 					8AFAEAFA1E6E32E900E09B68 = {
 						CreatedOnToolsVersion = 8.2.1;
-						LastSwiftMigration = 0900;
+						LastSwiftMigration = 1020;
 						ProvisioningStyle = Automatic;
 					};
 				};
 			};
 			buildConfigurationList = D4201E7A1CFA5151008EEC6E /* Build configuration list for PBXProject "Down" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
+				Base,
 			);
 			mainGroup = D4201E761CFA5151008EEC6E;
+			packageReferences = (
+				EED7FED525E303000033E33A /* XCRemoteSwiftPackageReference "swift-snapshot-testing" */,
+			);
 			productRefGroup = D4201E811CFA5151008EEC6E /* Products */;
 			projectDirPath = "";
 			projectRoot = "";
@@ -486,6 +860,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				EED7FED825E3133C0033E33A /* DownView (macOS).bundle in Resources */,
 				14C5E33521877CE900D5380C /* DownView.bundle in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -517,9 +892,27 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "# Type a script or drag a script file from your workspace to insert its path.\nRESOURCE_PATH=$SRCROOT/Resources\n\nFILENAME_IN_BUNDLE=DownView.bundle\n\nBUILD_APP_DIR=${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Resources\n\necho \"$RESOURCE_PATH\"\necho \"$BUILD_APP_DIR\"\n\nif [ \"$PLATFORM_NAME\" == \"macosx\" ]; then\n    echo $BUILD_APP_DIR\n    rm -r \"$BUILD_APP_DIR/$FILENAME_IN_BUNDLE/\"\n    cp -R \"$RESOURCE_PATH/DownView (macOS).bundle\" \"$BUILD_APP_DIR/$FILENAME_IN_BUNDLE/\"\nfi\n";
+			shellScript = "# Type a script or drag a script file from your workspace to insert its path.\nRESOURCE_PATH=$SRCROOT/Sources/Down/Resources\n\nFILENAME_IN_BUNDLE=DownView.bundle\n\nBUILD_APP_DIR=${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Resources\n\necho \"$RESOURCE_PATH\"\necho \"$BUILD_APP_DIR\"\n\nif [ \"$PLATFORM_NAME\" == \"macosx\" ]; then\n    echo $BUILD_APP_DIR\n    rm -r \"$BUILD_APP_DIR/$FILENAME_IN_BUNDLE/\"\n    cp -R \"$RESOURCE_PATH/DownView (macOS).bundle\" \"$BUILD_APP_DIR/$FILENAME_IN_BUNDLE/\"\nfi\n";
 			showEnvVarsInLog = 0;
 		};
+		EED185ED26054F800051E616 /* Swiftlint */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+			);
+			name = Swiftlint;
+			outputFileListPaths = (
+			);
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "if which swiftlint >/dev/null; then\n  swiftlint\nelse\n  echo \"warning: SwiftLint not installed, download from https://github.com/realm/SwiftLint\"\nfi\n";
+		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -531,35 +924,86 @@
 				8A569F761E6B3EE3008BE2AC /* NSAttributedString+HTML.swift in Sources */,
 				8A569F5A1E6B3ED9008BE2AC /* html.c in Sources */,
 				8A569F5E1E6B3ED9008BE2AC /* iterator.c in Sources */,
+				EEEBEE70225D2B9D00AE438D /* DebugVisitor.swift in Sources */,
+				EEEBEE59225D2A7000AE438D /* ThematicBreak.swift in Sources */,
 				8A569F481E6B3ED2008BE2AC /* DownView.swift in Sources */,
+				EE4F77C322FF3F170026A983 /* DownStylerConfiguration.swift in Sources */,
 				8A569F591E6B3ED9008BE2AC /* houdini_html_u.c in Sources */,
+				EEEBEE63225D2AD400AE438D /* HtmlInline.swift in Sources */,
 				8A569F621E6B3ED9008BE2AC /* node.c in Sources */,
+				EE4484932301F2DB0065C836 /* CGRect+Helpers.swift in Sources */,
+				26CABB93252B4D490032183C /* ChildSequence.swift in Sources */,
+				EEEBEE6D225D2B3200AE438D /* Image.swift in Sources */,
+				EED8DA9722BECD7500E54492 /* FontCollection.swift in Sources */,
+				EEEBEE4D225D2A0200AE438D /* Item.swift in Sources */,
+				EEF8580F22FA101C0025370B /* DownDebugLayoutManager.swift in Sources */,
 				8A569F6F1E6B3EDE008BE2AC /* DownAttributedStringRenderable.swift in Sources */,
+				EEEBEE55225D2A4E00AE438D /* Paragraph.swift in Sources */,
+				EEBE62F025E28F3D005CCAD6 /* BundleHelper.swift in Sources */,
 				8A569F721E6B3EDE008BE2AC /* DownHTMLRenderable.swift in Sources */,
+				EED8DA9422BECC2100E54492 /* UIFont+Traits.swift in Sources */,
+				EE44848B2301E51C0065C836 /* CodeBlockOptions.swift in Sources */,
+				EE4484912301F2920065C836 /* CGPoint+Translate.swift in Sources */,
+				EEFFFDDB22F4C36800036FD5 /* ThematicBreakAttribute.swift in Sources */,
+				EEE2C7F122C2AFEF001B7054 /* ListItemParagraphStyler.swift in Sources */,
 				8A569F581E6B3ED9008BE2AC /* houdini_html_e.c in Sources */,
+				EEEBEE5D225D2A8F00AE438D /* SoftBreak.swift in Sources */,
+				EE48C7D922EC9250004815ED /* ParagraphStyleCollection.swift in Sources */,
+				EEEBEE6B225D2B2200AE438D /* Link.swift in Sources */,
 				8A569F531E6B3ED9008BE2AC /* commonmark.c in Sources */,
+				EEA2BDC422F704F200D0C72C /* QuoteStripeOptions.swift in Sources */,
 				8A569F4A1E6B3ED9008BE2AC /* buffer.c in Sources */,
+				EED8DA9222BECBF200E54492 /* NSMutableAttributedString+Attributes.swift in Sources */,
+				EED8DA9022BECBAE00E54492 /* NSAttributedString+Helpers.swift in Sources */,
+				EEFFFDDD22F4C8AB00036FD5 /* DownLayoutManager.swift in Sources */,
 				8A569F771E6B3EE3008BE2AC /* String+ToHTML.swift in Sources */,
 				8A569F751E6B3EDE008BE2AC /* DownRenderable.swift in Sources */,
+				EEA2BDC622F7057600D0C72C /* ListItemOptions.swift in Sources */,
+				EE8F38CE22BFEDE50056270E /* ListItemPrefixGenerator.swift in Sources */,
 				8A569F741E6B3EDE008BE2AC /* DownXMLRenderable.swift in Sources */,
 				8A569F6B1E6B3ED9008BE2AC /* utf8.c in Sources */,
 				8A569F791E6B3EE7008BE2AC /* DownOptions.swift in Sources */,
+				EEEBEE72225D2F9200AE438D /* AttributedStringVisitor.swift in Sources */,
+				EEEBEE4B225D29D800AE438D /* List.swift in Sources */,
+				EEEBEE57225D2A6200AE438D /* Heading.swift in Sources */,
 				8A569F601E6B3ED9008BE2AC /* latex.c in Sources */,
 				8A569F711E6B3EDE008BE2AC /* DownGroffRenderable.swift in Sources */,
+				EEEBEE51225D2A2900AE438D /* HtmlBlock.swift in Sources */,
 				8A569F691E6B3ED9008BE2AC /* scanners.c in Sources */,
 				8A569F701E6B3EDE008BE2AC /* DownCommonMarkRenderable.swift in Sources */,
 				8A569F7A1E6B3EEA008BE2AC /* Down.swift in Sources */,
+				EE5F2BA42262564A00B7C0F3 /* Styler.swift in Sources */,
+				EEA5C02922F58A0900B91D60 /* DownTextView.swift in Sources */,
 				8A569F731E6B3EDE008BE2AC /* DownLaTeXRenderable.swift in Sources */,
 				8A569F781E6B3EE7008BE2AC /* DownErrors.swift in Sources */,
 				8A569F5C1E6B3ED9008BE2AC /* inlines.c in Sources */,
+				EE48C7DB22EC946F004815ED /* ColorCollection.swift in Sources */,
+				EEA5C02D22F5C96B00B91D60 /* QuoteStripeAttribute.swift in Sources */,
 				8A569F571E6B3ED9008BE2AC /* houdini_href_e.c in Sources */,
 				8A569F4D1E6B3ED9008BE2AC /* cmark.c in Sources */,
+				EEEBEE65225D2AE800AE438D /* CustomInline.swift in Sources */,
+				EE0E54F82300800E0070C83F /* BlockBackgroundColorAttribute.swift in Sources */,
+				EEF1376F2259E53400D7DDE0 /* Node.swift in Sources */,
 				8A569F6D1E6B3ED9008BE2AC /* xml.c in Sources */,
 				8A569F6E1E6B3EDE008BE2AC /* DownASTRenderable.swift in Sources */,
+				EEF8581122FA11690025370B /* DownDebugTextView.swift in Sources */,
+				EEEBEE5B225D2A7E00AE438D /* Text.swift in Sources */,
+				EEEBEE4F225D2A1400AE438D /* CodeBlock.swift in Sources */,
+				EED8DA8E22BE404F00E54492 /* DownStyler.swift in Sources */,
+				EEEBEE5F225D2AA700AE438D /* LineBreak.swift in Sources */,
+				EEEBEE61225D2AC000AE438D /* Code.swift in Sources */,
 				8A569F491E6B3ED9008BE2AC /* blocks.c in Sources */,
+				EEF137712259E7E700D7DDE0 /* Visitor.swift in Sources */,
+				EEEBEE53225D2A3C00AE438D /* CustomBlock.swift in Sources */,
+				EEEBEE69225D2B1200AE438D /* Strong.swift in Sources */,
+				EEEBEE47225D298D00AE438D /* Document.swift in Sources */,
 				8A569F4F1E6B3ED9008BE2AC /* cmark_ctype.c in Sources */,
+				EE469B11226CF3B500C0655D /* BaseNode.swift in Sources */,
 				8A569F671E6B3ED9008BE2AC /* render.c in Sources */,
+				EEEBEE49225D29C200AE438D /* BlockQuote.swift in Sources */,
 				8A569F651E6B3ED9008BE2AC /* references.c in Sources */,
+				EEEBEE67225D2AF900AE438D /* Emphasis.swift in Sources */,
+				EEA2BDCA22F7152B00D0C72C /* ThematicBreakOptions.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -567,7 +1011,23 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				EE3E7E54260400F900170A52 /* ThematicBreakSyleTests.swift in Sources */,
+				EE3E7E4D260400F500170A52 /* BlockQuoteStyleTests.swift in Sources */,
+				EE97253E22C130D8004D3B3A /* NSMutableAttributedString+AttributesTests.swift in Sources */,
+				EE3E7E622604010000170A52 /* InlineStyleTests.swift in Sources */,
+				EE3E7E702604010700170A52 /* StylerTestSuite.swift in Sources */,
+				EE3E7E692604010300170A52 /* ListItemStyleTests.swift in Sources */,
+				EE3E7E46260400F100170A52 /* CodeBlockStyleTests.swift in Sources */,
+				EE97254322C14B79004D3B3A /* NSAttributedString+HelpersTests.swift in Sources */,
 				8AFAEB091E6E331700E09B68 /* StringTests.swift in Sources */,
+				EE3E7E5B260400FC00170A52 /* HeadingStyleTests.swift in Sources */,
+				EE408A3D23033B6B00E5278A /* ListItemPrefixGeneratorTests.swift in Sources */,
+				EE8F38CC22BFB2420056270E /* NodeTests.swift in Sources */,
+				EE3E7E3F260400EE00170A52 /* LinkStyleTests.swift in Sources */,
+				EE3E7E38260400E800170A52 /* DownDebugLayoutManagerTests.swift in Sources */,
+				EE408A39230338B600E5278A /* CGPointTranslateTests.swift in Sources */,
+				EE408A3B2303399B00E5278A /* CGRectHelpersTests.swift in Sources */,
+				EE3E7E88260401F000170A52 /* VisitorTests.swift in Sources */,
 				8AFAEB071E6E331700E09B68 /* DownViewTests.swift in Sources */,
 				8AFAEB061E6E331700E09B68 /* BindingTests.swift in Sources */,
 				8AFAEB081E6E331700E09B68 /* NSAttributedStringTests.swift in Sources */,
@@ -589,6 +1049,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 90A40A991EC0309A004F2E91 /* Universal-Framework-Target.xcconfig */;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				CODE_SIGN_IDENTITY = "";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				CODE_SIGN_STYLE = Automatic;
@@ -597,13 +1058,12 @@
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
-				INFOPLIST_FILE = "Resources/Down-Info.plist";
+				INFOPLIST_FILE = "Supporting Files/Down-Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "${SRCROOT}/Source/cmark";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_INCLUDE_PATHS = "${SRCROOT}/Sources/cmark";
+				"VALID_ARCHS[sdk=iphonesimulator*]" = "i386 x86_64 arm64";
 			};
 			name = Debug;
 		};
@@ -611,6 +1071,7 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 90A40A991EC0309A004F2E91 /* Universal-Framework-Target.xcconfig */;
 			buildSettings = {
+				APPLICATION_EXTENSION_API_ONLY = YES;
 				CODE_SIGN_IDENTITY = "";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "";
 				CODE_SIGN_STYLE = Automatic;
@@ -619,13 +1080,12 @@
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				DYLIB_INSTALL_NAME_BASE = "@rpath";
-				INFOPLIST_FILE = "Resources/Down-Info.plist";
+				INFOPLIST_FILE = "Supporting Files/Down-Info.plist";
 				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
 				PROVISIONING_PROFILE_SPECIFIER = "";
 				SKIP_INSTALL = YES;
-				SWIFT_INCLUDE_PATHS = "${SRCROOT}/Source/cmark";
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				SWIFT_INCLUDE_PATHS = "${SRCROOT}/Sources/cmark";
+				"VALID_ARCHS[sdk=iphonesimulator*]" = "i386 x86_64 arm64";
 			};
 			name = Release;
 		};
@@ -633,10 +1093,17 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 90A40A9A1EC0309A004F2E91 /* Universal-Target-Base.xcconfig */;
 			buildSettings = {
-				INFOPLIST_FILE = "Resources/DownTests-Info.plist";
-				PRODUCT_BUNDLE_IDENTIFIER = com.glazeddonut.DownTests;
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				DEVELOPMENT_TEAM = "";
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(PROJECT_DIR)/Carthage/Build/iOS",
+				);
+				INFOPLIST_FILE = "Supporting Files/DownTests-Info.plist";
+				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.downMarkdown.DownTests;
+				"TARGETED_DEVICE_FAMILY[sdk=appletvos*]" = 3;
+				"TARGETED_DEVICE_FAMILY[sdk=appletvsimulator*]" = 3;
+				TVOS_DEPLOYMENT_TARGET = 13.0;
 			};
 			name = Debug;
 		};
@@ -644,10 +1111,17 @@
 			isa = XCBuildConfiguration;
 			baseConfigurationReference = 90A40A9A1EC0309A004F2E91 /* Universal-Target-Base.xcconfig */;
 			buildSettings = {
-				INFOPLIST_FILE = "Resources/DownTests-Info.plist";
-				PRODUCT_BUNDLE_IDENTIFIER = com.glazeddonut.DownTests;
-				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
+				DEVELOPMENT_TEAM = "";
+				FRAMEWORK_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(PROJECT_DIR)/Carthage/Build/iOS",
+				);
+				INFOPLIST_FILE = "Supporting Files/DownTests-Info.plist";
+				IPHONEOS_DEPLOYMENT_TARGET = 13.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.downMarkdown.DownTests;
+				"TARGETED_DEVICE_FAMILY[sdk=appletvos*]" = 3;
+				"TARGETED_DEVICE_FAMILY[sdk=appletvsimulator*]" = 3;
+				TVOS_DEPLOYMENT_TARGET = 13.0;
 			};
 			name = Release;
 		};
@@ -657,6 +1131,7 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES = YES;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -703,12 +1178,11 @@
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				ONLY_ACTIVE_ARCH = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = "com.glazeddonut.$(TARGET_NAME:c99-identifier)";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.downMarkdown.$(TARGET_NAME:c99-identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -721,6 +1195,7 @@
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
 				CLANG_ALLOW_NON_MODULAR_INCLUDES_IN_FRAMEWORK_MODULES = YES;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_ANALYZER_NONNULL = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
@@ -760,11 +1235,11 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				PRODUCT_BUNDLE_IDENTIFIER = "com.glazeddonut.$(TARGET_NAME:c99-identifier)";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.downMarkdown.$(TARGET_NAME:c99-identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
+				SWIFT_COMPILATION_MODE = wholemodule;
+				SWIFT_OPTIMIZATION_LEVEL = "-O";
 				SWIFT_SWIFT3_OBJC_INFERENCE = Off;
-				SWIFT_VERSION = 4.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VALIDATE_PRODUCT = YES;
 				VERSIONING_SYSTEM = "apple-generic";
@@ -803,6 +1278,25 @@
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
+
+/* Begin XCRemoteSwiftPackageReference section */
+		EED7FED525E303000033E33A /* XCRemoteSwiftPackageReference "swift-snapshot-testing" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/pointfreeco/swift-snapshot-testing.git";
+			requirement = {
+				kind = upToNextMajorVersion;
+				minimumVersion = 1.8.2;
+			};
+		};
+/* End XCRemoteSwiftPackageReference section */
+
+/* Begin XCSwiftPackageProductDependency section */
+		EE3E7E802604019300170A52 /* SnapshotTesting */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = EED7FED525E303000033E33A /* XCRemoteSwiftPackageReference "swift-snapshot-testing" */;
+			productName = SnapshotTesting;
+		};
+/* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = D4201E771CFA5151008EEC6E /* Project object */;
 }

Down.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -2,6 +2,6 @@
 <Workspace
    version = "1.0">
    <FileRef
-      location = "self:Down.xcodeproj">
+      location = "self:">
    </FileRef>
 </Workspace>

Down.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -0,0 +1,16 @@
+{
+  "object": {
+    "pins": [
+      {
+        "package": "SnapshotTesting",
+        "repositoryURL": "https://github.com/pointfreeco/swift-snapshot-testing.git",
+        "state": {
+          "branch": null,
+          "revision": "c466812aa2e22898f27557e2e780d3aad7a27203",
+          "version": "1.8.2"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

Down.xcodeproj/xcshareddata/xcschemes/Down.xcscheme

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1010"
+   LastUpgradeVersion = "1130"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
@@ -26,8 +26,17 @@
       buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      codeCoverageEnabled = "YES"
-      shouldUseLaunchSchemeArgsEnv = "YES">
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      codeCoverageEnabled = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "8A569F3F1E6B3E50008BE2AC"
+            BuildableName = "Down.framework"
+            BlueprintName = "Down"
+            ReferencedContainer = "container:Down.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -40,17 +49,6 @@
             </BuildableReference>
          </TestableReference>
       </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "8A569F3F1E6B3E50008BE2AC"
-            BuildableName = "Down.framework"
-            BlueprintName = "Down"
-            ReferencedContainer = "container:Down.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </TestAction>
    <LaunchAction
       buildConfiguration = "Debug"
@@ -71,8 +69,6 @@
             ReferencedContainer = "container:Down.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"

LinuxMain.swift

@@ -0,0 +1,7 @@
+import XCTest
+
+var tests = [XCTestCaseEntry]()
+
+// FIXME: Run on macOS `swift test --generate-linuxmain` and maintain Linux Tests.
+
+XCTMain(tests)

Package.swift

@@ -0,0 +1,64 @@
+// swift-tools-version:5.3
+
+import PackageDescription
+
+let package = Package(
+    name: "Down",
+    platforms: [
+        .macOS("10.11"),
+        .iOS("9.0"),
+        .tvOS("9.0")
+    ],
+    products: [
+        .library(
+            name: "Down",
+            targets: ["Down"]
+        )
+    ],
+    targets: [
+        .target(
+            name: "libcmark",
+            dependencies: [],
+            path: "Sources/cmark",
+            exclude: [
+              "include",
+              "case_fold_switch.inc",
+              "entities.inc",
+              "COPYING"
+            ],
+            publicHeadersPath: "./"
+        ),
+        .target(
+            name: "Down",
+            dependencies: ["libcmark"],
+            path: "Sources/Down",
+            exclude: ["Down.h"],
+          resources: [
+            .copy("Resources/DownView.bundle"),
+            .copy("Resources/DownView (macOS).bundle"),
+          ]
+        ),
+        .testTarget(
+            name: "DownTests",
+            dependencies: ["Down"],
+            path: "Tests/DownTests",
+            exclude: [
+                "AST/VisitorTests.swift",
+                "AST/__Snapshots__",
+                "DownViewTests.swift",
+                "Fixtures",
+                "Styler/__Snapshots__",
+                "Styler/BlockQuoteStyleTests.swift",
+                "Styler/CodeBlockStyleTests.swift",
+                "Styler/DownDebugLayoutManagerTests.swift",
+                "Styler/HeadingStyleTests.swift",
+                "Styler/LinkStyleTests.swift",
+                "Styler/InlineStyleTests.swift",
+                "Styler/ListItemStyleTests.swift",
+                "Styler/StylerTestSuite.swift",
+                "Styler/ThematicBreakSyleTests.swift"
+            ]
+        )
+    ],
+    swiftLanguageVersions: [.v5]
+)

README.md

@@ -1,41 +1,59 @@
 ## Down
-[![Build Status](https://travis-ci.org/iwasrobbed/Down.svg?branch=master)](https://travis-ci.org/iwasrobbed/Down)
-[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/iwasrobbed/Down/blob/master/LICENSE)
-[![CocoaPods](https://img.shields.io/cocoapods/v/Down.svg?maxAge=10800)]()
-[![Swift 4](https://img.shields.io/badge/language-Swift-blue.svg)](https://swift.org)
+[![Build Status](https://travis-ci.com/johnxnguyen/Down.svg?branch=master)](https://travis-ci.com/johnxnguyen/Down)
+[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/johnxnguyen/Down/blob/master/LICENSE)
+[![CocoaPods](https://img.shields.io/cocoapods/v/Down)](https://cocoapods.org/pods/Down)
+[![Swift 5](https://img.shields.io/badge/language-Swift-blue.svg)](https://swift.org)
 [![macOS](https://img.shields.io/badge/OS-macOS-orange.svg)](https://developer.apple.com/macos/)
 [![iOS](https://img.shields.io/badge/OS-iOS-orange.svg)](https://developer.apple.com/ios/)
 [![tvOS](https://img.shields.io/badge/OS-tvOS-orange.svg)](https://developer.apple.com/tvos/)
-[![Coverage Status](https://coveralls.io/repos/github/iwasrobbed/Down/badge.svg?branch=master)](https://coveralls.io/github/iwasrobbed/Down?branch=master)
+[![Linux](https://img.shields.io/badge/OS-Linux-orange.svg)](https://www.linux.org/)
+[![Code Coverage](https://codecov.io/gh/johnxnguyen/Down/branch/master/graph/badge.svg)](https://codecov.io/gh/johnxnguyen/Down)
 
-Blazing fast Markdown (CommonMark) rendering in Swift, built upon [cmark v0.28.3](https://github.com/commonmark/cmark).
+Blazing fast Markdown (CommonMark) rendering in Swift, built upon [cmark v0.29.0](https://github.com/commonmark/cmark).
 
-Is your app using it? [Let us know!](mailto:rob@robphillips.me)
+Is your app using it? [Let us know!](mailto:polyxo@protonmail.com)
+
+If you're looking for `iwasrobbed/Down`, you found it! [Rob Phillips](https://github.com/iwasrobbed), the originator of this repository,
+has transferred it to me as I will be the primary maintainer from now on. Thanks to Rob for bringing Down as far as it has come and for
+entrusting me with its care.
+
+All existing references to `iwasrobbed/Down` should redirect to this repository. However, It is recommended to update those urls to point
+to this repository.
 
 #### Maintainers
 
+- [John Nguyen](https://github.com/johnxnguyen)
 - [Rob Phillips](https://github.com/iwasrobbed)
 - [Keaton Burleson](https://github.com/128keaton)
 - [phoney](https://github.com/phoney)
 - [Tony Arnold](https://github.com/tonyarnold)
 - [Ken Harris](https://github.com/kengruven)
 - [Chris Zielinski](https://github.com/chriszielinski)
-- [Other contributors](https://github.com/iwasrobbed/Down/graphs/contributors) 🙌
+- [Other contributors](https://github.com/johnxnguyen/Down/graphs/contributors) 🙌
 
 ### Installation
 
-Note: Swift 4 support is now on the `master` branch and any tag >= 0.4.x (Swift 3 is 0.3.x)
+Note: Swift support is summarized in the table below.
 
-Quickly install using [CocoaPods](https://cocoapods.org):
+|Swift Version|Tag|
+| --- | --- |
+| Swift 5.1 | >= 0.9.0 |
+| Swift 5.0 | >= 0.8.1 |
+| Swift 4 | >= 0.4.x |
+| Swift 3 | 0.3.x |
+
+ now on the `master` branch and any tag >= 0.8.1 (Swift 4 is >= 0.4.x, Swift 3 is 0.3.x)
+
+#### Quickly install using [CocoaPods](https://cocoapods.org):
 
 ```ruby
 pod 'Down'
 ```
 
-Or [Carthage](https://github.com/Carthage/Carthage):
+#### Install using [Carthage](https://github.com/Carthage/Carthage):
 
 ```
-github "iwasrobbed/Down"
+github "johnxnguyen/Down"
 ```
 Due to limitations in Carthage regarding platform specification, you need to define the platform with Carthage.
 
@@ -43,11 +61,16 @@ e.g.
 
 ```carthage update --platform iOS```
 
-Or manually install:
+#### Install using [Swift Package Manager](https://github.com/apple/swift-package-manager):
+
+To add *Down* to your project, select `File → Swift Packages → Add Package Dependency` and enter the GitHub URL for *Down*. 
+See [Adding Package Dependencies to Your App](https://developer.apple.com/documentation/xcode/adding_package_dependencies_to_your_app) for detailed instructions.
+
+#### Or manually install:
 
 1. Clone this repository
-2. Build the Down project
-3. Add the resulting framework file to your project
+2. Drag and drop the Down project into your workspace file, adding the framework in the embedded framework section
+2. Build and run your app
 4. ?
 5. Profit
 
@@ -91,27 +114,27 @@ Meta example of rendering this README:
 The `Down` struct has everything you need if you just want out-of-the-box setup for parsing and conversion.
 
 ```swift
-let down = Down(markdownString: "## [Down](https://github.com/iwasrobbed/Down)")
+let down = Down(markdownString: "## [Down](https://github.com/johnxnguyen/Down)")
 
 // Convert to HTML
 let html = try? down.toHTML()
-// "<h2><a href=\"https://github.com/iwasrobbed/Down\">Down</a></h2>\n"
+// "<h2><a href=\"https://github.com/johnxnguyen/Down\">Down</a></h2>\n"
 
 // Convert to XML
 let xml = try? down.toXML()
-// "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE document SYSTEM \"CommonMark.dtd\">\n<document xmlns=\"http://commonmark.org/xml/1.0\">\n  <heading level=\"2\">\n    <link destination=\"https://github.com/iwasrobbed/Down\" title=\"\">\n      <text>Down</text>\n    </link>\n  </heading>\n</document>\n"
+// "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!DOCTYPE document SYSTEM \"CommonMark.dtd\">\n<document xmlns=\"http://commonmark.org/xml/1.0\">\n  <heading level=\"2\">\n    <link destination=\"https://github.com/johnxnguyen/Down\" title=\"\">\n      <text>Down</text>\n    </link>\n  </heading>\n</document>\n"
 
 // Convert to groff man
 let man = try? down.toGroff()
-// ".SS\nDown (https://github.com/iwasrobbed/Down)\n"
+// ".SS\nDown (https://github.com/johnxnguyen/Down)\n"
 
 // Convert to LaTeX
 let latex = try? down.toLaTeX()
-// "\\subsection{\\href{https://github.com/iwasrobbed/Down}{Down}}\n"
+// "\\subsection{\\href{https://github.com/johnxnguyen/Down}{Down}}\n"
 
 // Convert to CommonMark Markdown
 let commonMark = try? down.toCommonMark()
-// "## [Down](https://github.com/iwasrobbed/Down)\n"
+// "## [Down](https://github.com/johnxnguyen/Down)\n"
 
 // Convert to an attributed string
 let attributedString = try? down.toAttributedString()
@@ -165,11 +188,11 @@ public struct MarkdownToHTML: DownHTMLRenderable {
 `DownView` can be configured with a custom bundle using your own HTML / CSS or to do things like supporting
 Dynamic Type or custom fonts, etc. It's completely configurable.
 
-This option can be found in [DownView's instantiation function](https://github.com/iwasrobbed/Down/blob/master/Source/Views/DownView.swift#L26).
+This option can be found in [DownView's instantiation function](https://github.com/johnxnguyen/Down/blob/master/Source/Views/DownView.swift#L26).
 
 ##### Prevent zoom
 
-The default implementation of the `DownView` allows for zooming in the rendered content. If you want to disable this, then you’ll need to instantiate the `DownView` with a custom bundle where the `viewport` in `index.html` has been assigned `user-scalable=no`. More info can be found [here](https://github.com/iwasrobbed/Down/pull/30).
+The default implementation of the `DownView` allows for zooming in the rendered content. If you want to disable this, then you’ll need to instantiate the `DownView` with a custom bundle where the `viewport` in `index.html` has been assigned `user-scalable=no`. More info can be found [here](https://github.com/johnxnguyen/Down/pull/30).
 
 ### Options
 
@@ -198,10 +221,18 @@ public static let hardBreaks = DownOptions(rawValue: 1 << 2)
  `file:`, and `data:`, except for `image/png`, `image/gif`,
  `image/jpeg`, or `image/webp` mime types).  Raw HTML is replaced
  by a placeholder HTML comment. Unsafe links are replaced by
- empty strings.
+ empty strings. Note that this option is provided for backwards
+ compatibility, but safe mode is now the default.
 */
 public static let safe = DownOptions(rawValue: 1 << 3)
 
+/**
+ Allow raw HTML and unsafe links. Note that safe mode is now
+ the default, and the unsafe option must be used if rendering
+ of raw HTML and unsafe links is desired.
+*/
+public static let unsafe = DownOptions(rawValue: 1 << 17)
+
 // MARK: - Parsing Options
 
 /**
@@ -219,6 +250,11 @@ public static let validateUTF8 = DownOptions(rawValue: 1 << 5)
  Convert straight quotes to curly, --- to em dashes, -- to en dashes.
 */
 public static let smart = DownOptions(rawValue: 1 << 6)
+
+/**
+ Combine smart typography with HTML rendering.
+*/
+public static let smartUnsaFe = DownOptions(rawValue: (1 << 17) + (1 << 6))
 ```
 
 ### Supports
@@ -234,4 +270,4 @@ Please feel free to fork and create a pull request for bug fixes or improvements
 ### Credit
 This library is a wrapper around [cmark](https://github.com/commonmark/cmark), which is built upon the [CommonMark](http://commonmark.org) Markdown specification.
 
-[cmark](https://github.com/commonmark/cmark) is Copyright (c) 2014 - 2017, John MacFarlane. View [full license](https://github.com/commonmark/cmark/blob/master/COPYING).
+[cmark](https://github.com/commonmark/cmark) is Copyright (c) 2014, John MacFarlane. View [full license](https://github.com/commonmark/cmark/blob/master/COPYING).

Resources/Configurations/Deployment-Targets.xcconfig

@@ -1,4 +0,0 @@
-IPHONEOS_DEPLOYMENT_TARGET = 8.0
-MACOSX_DEPLOYMENT_TARGET = 10.11
-TVOS_DEPLOYMENT_TARGET = 9.0
-WATCHOS_DEPLOYMENT_TARGET = 3.0

Source/Down.swift

@@ -1,30 +0,0 @@
-//
-//  Down.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/28/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-
-public struct Down: DownASTRenderable, DownHTMLRenderable, DownXMLRenderable,
-                    DownLaTeXRenderable, DownGroffRenderable, DownCommonMarkRenderable,
-                    DownAttributedStringRenderable {
-    /**
-     A string containing CommonMark Markdown
-    */
-    public var markdownString: String
-
-    /**
-     Initializes the container with a CommonMark Markdown string which can then be rendered depending on protocol conformance
-
-     - parameter markdownString: A string containing CommonMark Markdown
-
-     - returns: An instance of Self
-     */
-    
-    public init(markdownString: String) {
-        self.markdownString = markdownString
-    }
-}

Source/Enums & Options/DownErrors.swift

@@ -1,35 +0,0 @@
-//
-//  DownErrors.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/28/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-
-public enum DownErrors: Error {
-    /**
-     Thrown when there was an issue converting the Markdown into an abstract syntax tree
-     */
-    case markdownToASTError
-
-    /**
-     Thrown when the abstract syntax tree could not be rendered into another format
-    */
-    case astRenderingError
-
-    /**
-     Thrown when an HTML string cannot be converted into an `NSData` representation
-    */
-    case htmlDataConversionError
-
-    #if os(macOS)
-    /**
-     Thrown when a custom template bundle has a non-standard bundle format.
-
-     Specifically, the file URL of the bundle’s subdirectory containing resource files could not be found (i.e. the bundle's `resourceURL` property is nil).
-     */
-    case nonStandardBundleFormatError
-    #endif
-}

Source/Enums & Options/DownOptions.swift

@@ -1,60 +0,0 @@
-//
-//  DownOptions.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/28/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public struct DownOptions: OptionSet {
-    public let rawValue: Int32
-    public init(rawValue: Int32) { self.rawValue = rawValue }
-
-    /**
-     Default options
-    */
-    public static let `default` = DownOptions(rawValue: CMARK_OPT_DEFAULT)
-
-    // MARK: - Rendering Options
-
-    /**
-     Include a `data-sourcepos` attribute on all block elements
-    */
-    public static let sourcePos = DownOptions(rawValue: CMARK_OPT_SOURCEPOS)
-
-    /**
-     Render `softbreak` elements as hard line breaks.
-    */
-    public static let hardBreaks = DownOptions(rawValue: CMARK_OPT_HARDBREAKS)
-
-    /**
-     Suppress raw HTML and unsafe links (`javascript:`, `vbscript:`,
-     `file:`, and `data:`, except for `image/png`, `image/gif`,
-     `image/jpeg`, or `image/webp` mime types).  Raw HTML is replaced
-     by a placeholder HTML comment. Unsafe links are replaced by
-     empty strings.
-    */
-    public static let safe = DownOptions(rawValue: CMARK_OPT_SAFE)
-
-    // MARK: - Parsing Options
-
-    /**
-     Normalize tree by consolidating adjacent text nodes.
-    */
-    public static let normalize = DownOptions(rawValue: CMARK_OPT_NORMALIZE)
-
-    /**
-     Validate UTF-8 in the input before parsing, replacing illegal
-     sequences with the replacement character U+FFFD.
-    */
-    public static let validateUTF8 = DownOptions(rawValue: CMARK_OPT_VALIDATE_UTF8)
-
-    /**
-     Convert straight quotes to curly, --- to em dashes, -- to en dashes.
-    */
-    public static let smart = DownOptions(rawValue: CMARK_OPT_SMART)
-
-}

Source/Renderers/DownASTRenderable.swift

@@ -1,67 +0,0 @@
-//
-//  DownASTRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/31/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownASTRenderable: DownRenderable {
-    /**
-     Generates an abstract syntax tree from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-
-     - throws: `MarkdownToASTError` if conversion fails
-
-     - returns: An abstract syntax tree representation of the Markdown input
-     */
-    
-    func toAST(_ options: DownOptions) throws -> UnsafeMutablePointer<cmark_node>
-}
-
-public extension DownASTRenderable {
-    /**
-     Generates an abstract syntax tree from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `MarkdownToASTError` if conversion fails
-
-     - returns: An abstract syntax tree representation of the Markdown input
-     */
-    
-    public func toAST(_ options: DownOptions = .default) throws -> UnsafeMutablePointer<cmark_node> {
-        return try DownASTRenderer.stringToAST(markdownString, options: options)
-    }
-}
-
-public struct DownASTRenderer {
-    /**
-     Generates an abstract syntax tree from the given CommonMark Markdown string
-     
-     **Important:** It is the caller's responsibility to call `cmark_node_free(ast)` on the returned value
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `MarkdownToASTError` if conversion fails
-
-     - returns: An abstract syntax tree representation of the Markdown input
-     */
-    
-    public static func stringToAST(_ string: String, options: DownOptions = .default) throws -> UnsafeMutablePointer<cmark_node> {
-        var tree: UnsafeMutablePointer<cmark_node>?
-        string.withCString {
-            let stringLength = Int(strlen($0))
-            tree = cmark_parse_document($0, stringLength, options.rawValue)
-        }
-
-        guard let ast = tree else {
-            throw DownErrors.markdownToASTError
-        }
-        return ast
-    }
-}

Source/Renderers/DownAttributedStringRenderable.swift

@@ -1,46 +0,0 @@
-//
-//  DownAttributedStringRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 6/1/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownAttributedStringRenderable: DownHTMLRenderable {
-    /**
-     Generates an `NSAttributedString` from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-
-     - parameter stylesheet: a `String` to use as a CSS stylesheet when rendering
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: An `NSAttributedString`
-     */
-    
-    func toAttributedString(_ options: DownOptions, stylesheet: String?) throws -> NSAttributedString
-}
-
-public extension DownAttributedStringRenderable {
-    /**
-     Generates an `NSAttributedString` from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - parameter stylesheet: a `String` to use as the CSS stylesheet when rendering, defaulting to a style that uses the `NSAttributedString` default font
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: An `NSAttributedString`
-     */
-    
-    public func toAttributedString(_ options: DownOptions = .default, stylesheet: String? = nil) throws -> NSAttributedString {
-        let html = try self.toHTML(options)
-        let defaultStylesheet = "* {font-family: Helvetica } code, pre { font-family: Menlo }"
-        return try NSAttributedString(htmlString: "<style>" + (stylesheet ?? defaultStylesheet) + "</style>" + html)
-    }
-}

Source/Renderers/DownCommonMarkRenderable.swift

@@ -1,75 +0,0 @@
-//
-//  DownCommonMarkRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/31/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownCommonMarkRenderable: DownRenderable {
-    /**
-     Generates a CommonMark Markdown string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-     - parameter width:   The width to break on
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: CommonMark Markdown string
-     */
-    
-    func toCommonMark(_ options: DownOptions, width: Int32) throws -> String
-}
-
-public extension DownCommonMarkRenderable {
-    /**
-     Generates a CommonMark Markdown string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-     - parameter width:   The width to break on, defaulting to 0
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: CommonMark Markdown string
-     */
-    
-    public func toCommonMark(_ options: DownOptions = .default, width: Int32 = 0) throws -> String {
-        let ast = try DownASTRenderer.stringToAST(markdownString, options: options)
-        let commonMark = try DownCommonMarkRenderer.astToCommonMark(ast, options: options, width: width)
-        cmark_node_free(ast)
-        return commonMark
-    }
-}
-
-public struct DownCommonMarkRenderer {
-    /**
-     Generates a CommonMark Markdown string from the given abstract syntax tree
-     
-     **Note:** caller is responsible for calling `cmark_node_free(ast)` after this returns
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-     - parameter width:   The width to break on, defaulting to 0
-
-     - throws: `ASTRenderingError` if the AST could not be converted
-
-     - returns: CommonMark Markdown string
-     */
-    
-    public static func astToCommonMark(_ ast: UnsafeMutablePointer<cmark_node>,
-                                       options: DownOptions = .default,
-                                       width: Int32 = 0) throws -> String {
-        guard let cCommonMarkString = cmark_render_commonmark(ast, options.rawValue, width) else {
-            throw DownErrors.astRenderingError
-        }
-        defer { free(cCommonMarkString) }
-        
-        guard let commonMarkString = String(cString: cCommonMarkString, encoding: String.Encoding.utf8) else {
-            throw DownErrors.astRenderingError
-        }
-        
-        return commonMarkString
-    }
-}

Source/Renderers/DownGroffRenderable.swift

@@ -1,75 +0,0 @@
-//
-//  DownGroffRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/31/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownGroffRenderable: DownRenderable {
-    /**
-     Generates a groff man string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-     - parameter width:   The width to break on
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: groff man string
-     */
-    
-    func toGroff(_ options: DownOptions, width: Int32) throws -> String
-}
-
-public extension DownGroffRenderable {
-    /**
-     Generates a groff man string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-     - parameter width:   The width to break on, defaulting to 0
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: groff man string
-     */
-    
-    public func toGroff(_ options: DownOptions = .default, width: Int32 = 0) throws -> String {
-        let ast = try DownASTRenderer.stringToAST(markdownString, options: options)
-        let groff = try DownGroffRenderer.astToGroff(ast, options: options, width: width)
-        cmark_node_free(ast)
-        return groff
-    }
-}
-
-public struct DownGroffRenderer {
-    /**
-     Generates a groff man string from the given abstract syntax tree
-
-     **Note:** caller is responsible for calling `cmark_node_free(ast)` after this returns
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-     - parameter width:   The width to break on, defaulting to 0
-
-     - throws: `ASTRenderingError` if the AST could not be converted
-
-     - returns: groff man string
-     */
-    
-    public static func astToGroff(_ ast: UnsafeMutablePointer<cmark_node>,
-                                  options: DownOptions = .default,
-                                  width: Int32 = 0) throws -> String {
-        guard let cGroffString = cmark_render_man(ast, options.rawValue, width) else {
-            throw DownErrors.astRenderingError
-        }
-        defer { free(cGroffString) }
-        
-        guard let groffString = String(cString: cGroffString, encoding: String.Encoding.utf8) else {
-            throw DownErrors.astRenderingError
-        }
-
-        return groffString
-    }
-}

Source/Renderers/DownHTMLRenderable.swift

@@ -1,67 +0,0 @@
-//
-//  DownHTMLRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/28/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownHTMLRenderable: DownRenderable {
-    /**
-     Generates an HTML string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: HTML string
-     */
-    
-    func toHTML(_ options: DownOptions) throws -> String
-}
-
-public extension DownHTMLRenderable {
-    /**
-     Generates an HTML string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: HTML string
-     */
-    
-    public func toHTML(_ options: DownOptions = .default) throws -> String {
-        return try markdownString.toHTML(options)
-    }
-}
-
-public struct DownHTMLRenderer {
-    /**
-     Generates an HTML string from the given abstract syntax tree
-
-     **Note:** caller is responsible for calling `cmark_node_free(ast)` after this returns
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `ASTRenderingError` if the AST could not be converted
-
-     - returns: HTML string
-     */
-    
-    public static func astToHTML(_ ast: UnsafeMutablePointer<cmark_node>, options: DownOptions = .default) throws -> String {
-        guard let cHTMLString = cmark_render_html(ast, options.rawValue) else {
-            throw DownErrors.astRenderingError
-        }
-        defer { free(cHTMLString) }
-        
-        guard let htmlString = String(cString: cHTMLString, encoding: String.Encoding.utf8) else {
-            throw DownErrors.astRenderingError
-        }
-
-        return htmlString
-    }
-}

Source/Renderers/DownLaTeXRenderable.swift

@@ -1,75 +0,0 @@
-//
-//  DownLaTeXRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/31/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownLaTeXRenderable: DownRenderable {
-    /**
-     Generates a LaTeX string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-     - parameter width:   The width to break on
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: LaTeX string
-     */
-    
-    func toLaTeX(_ options: DownOptions, width: Int32) throws -> String
-}
-
-public extension DownLaTeXRenderable {
-    /**
-     Generates a LaTeX string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-     - parameter width:   The width to break on, defaulting to 0
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: LaTeX string
-     */
-    
-    public func toLaTeX(_ options: DownOptions = .default, width: Int32 = 0) throws -> String {
-        let ast = try DownASTRenderer.stringToAST(markdownString, options: options)
-        let latex = try DownLaTeXRenderer.astToLaTeX(ast, options: options, width: width)
-        cmark_node_free(ast)
-        return latex
-    }
-}
-
-public struct DownLaTeXRenderer {
-    /**
-     Generates a LaTeX string from the given abstract syntax tree
-
-     **Note:** caller is responsible for calling `cmark_node_free(ast)` after this returns
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-     - parameter width:   The width to break on, defaulting to 0
-
-     - throws: `ASTRenderingError` if the AST could not be converted
-
-     - returns: LaTeX string
-     */
-    
-    public static func astToLaTeX(_ ast: UnsafeMutablePointer<cmark_node>,
-                                  options: DownOptions = .default,
-                                  width: Int32 = 0) throws -> String {
-        guard let cLatexString = cmark_render_latex(ast, options.rawValue, width) else {
-            throw DownErrors.astRenderingError
-        }
-        defer { free(cLatexString) }
-        
-        guard let latexString = String(cString: cLatexString, encoding: String.Encoding.utf8) else {
-            throw DownErrors.astRenderingError
-        }
-        
-        return latexString
-    }
-}

Source/Renderers/DownXMLRenderable.swift

@@ -1,70 +0,0 @@
-//
-//  DownXMLRenderable.swift
-//  Down
-//
-//  Created by Rob Phillips on 5/31/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-import Foundation
-import libcmark
-
-public protocol DownXMLRenderable: DownRenderable {
-    /**
-     Generates an XML string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: XML string
-     */
-    
-    func toXML(_ options: DownOptions) throws -> String
-}
-
-public extension DownXMLRenderable {
-    /**
-     Generates an XML string from the `markdownString` property
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: XML string
-     */
-    
-    public func toXML(_ options: DownOptions = .default) throws -> String {
-        let ast = try DownASTRenderer.stringToAST(markdownString, options: options)
-        let xml = try DownXMLRenderer.astToXML(ast, options: options)
-        cmark_node_free(ast)
-        return xml
-    }
-}
-
-public struct DownXMLRenderer {
-    /**
-     Generates an XML string from the given abstract syntax tree
-
-     **Note:** caller is responsible for calling `cmark_node_free(ast)` after this returns
-
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `ASTRenderingError` if the AST could not be converted
-
-     - returns: XML string
-     */
-    
-    public static func astToXML(_ ast: UnsafeMutablePointer<cmark_node>, options: DownOptions = .default) throws -> String {
-        guard let cXMLString = cmark_render_xml(ast, options.rawValue) else {
-            throw DownErrors.astRenderingError
-        }
-        defer { free(cXMLString) }
-        
-        guard let xmlString = String(cString: cXMLString, encoding: String.Encoding.utf8) else {
-            throw DownErrors.astRenderingError
-        }
-
-        return xmlString
-    }
-}

Source/Views/DownView.swift

@@ -1,192 +0,0 @@
-//
-//  DownView.swift
-//  Down
-//
-//  Created by Rob Phillips on 6/1/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
-//
-
-#if os(tvOS) || os(watchOS)
-    // Sorry, not available for tvOS nor watchOS
-#else
-import WebKit
-
-// MARK: - Public API
-
-public typealias DownViewClosure = () -> ()
-
-open class DownView: WKWebView {
-
-    /**
-     Initializes a web view with the results of rendering a CommonMark Markdown string
-
-     - parameter frame:               The frame size of the web view
-     - parameter markdownString:      A string containing CommonMark Markdown
-     - parameter openLinksInBrowser:  Whether or not to open links using an external browser
-     - parameter templateBundle:      Optional custom template bundle. Leaving this as `nil` will use the bundle included with Down.
-     - parameter configuration:       Optional custom web view configuration.
-     - parameter didLoadSuccessfully: Optional callback for when the web content has loaded successfully
-
-     - returns: An instance of Self
-     */
-    public init(frame: CGRect, markdownString: String, openLinksInBrowser: Bool = true, templateBundle: Bundle? = nil, configuration: WKWebViewConfiguration? = nil, didLoadSuccessfully: DownViewClosure? = nil) throws {
-        self.didLoadSuccessfully = didLoadSuccessfully
-
-        if let templateBundle = templateBundle {
-            self.bundle = templateBundle
-        } else {
-            let classBundle = Bundle(for: DownView.self)
-            let url = classBundle.url(forResource: "DownView", withExtension: "bundle")!
-            self.bundle = Bundle(url: url)!
-        }
-
-        super.init(frame: frame, configuration: configuration ?? WKWebViewConfiguration())
-
-        #if os(macOS)
-            setupMacEnvironment()
-        #endif
-
-        if openLinksInBrowser || didLoadSuccessfully != nil { navigationDelegate = self }
-        try loadHTMLView(markdownString)
-    }
-
-    required public init?(coder: NSCoder) {
-        fatalError("init(coder:) has not been implemented")
-    }
-
-    #if os(macOS)
-    deinit {
-        clearTemporaryDirectory()
-    }
-    #endif
-    
-    // MARK: - API
-    
-    /**
-     Renders the given CommonMark Markdown string into HTML and updates the DownView while keeping the style intact
-     
-     - parameter markdownString:      A string containing CommonMark Markdown
-     - parameter didLoadSuccessfully: Optional callback for when the web content has loaded successfully
-
-     - throws: `DownErrors` depending on the scenario
-     */
-    public func update(markdownString: String, didLoadSuccessfully: DownViewClosure? = nil) throws {
-        // Note: As the init method takes this callback already, we only overwrite it here if
-        // a non-nil value is passed in
-        if let didLoadSuccessfully = didLoadSuccessfully {
-            self.didLoadSuccessfully = didLoadSuccessfully
-        }
-
-        try loadHTMLView(markdownString)
-    }
-
-    // MARK: - Private Properties
-
-    let bundle: Bundle
-
-    fileprivate lazy var baseURL: URL = {
-        return self.bundle.url(forResource: "index", withExtension: "html")!
-    }()
-
-    #if os(macOS)
-    fileprivate lazy var temporaryDirectoryURL: URL = {
-        return try! FileManager.default.url(for: .itemReplacementDirectory,
-                                            in: .userDomainMask,
-                                            appropriateFor: URL(fileURLWithPath: "/"),
-                                            create: true).appendingPathComponent("Down", isDirectory: true)
-    }()
-    #endif
-    
-    fileprivate var didLoadSuccessfully: DownViewClosure?
-}
-
-// MARK: - Private API
-
-private extension DownView {
-
-    func loadHTMLView(_ markdownString: String) throws {
-        let htmlString = try markdownString.toHTML()
-        let pageHTMLString = try htmlFromTemplate(htmlString)
-
-        #if os(iOS)
-            loadHTMLString(pageHTMLString, baseURL: baseURL)
-        #elseif os(macOS)
-            let indexURL = try createTemporaryBundle(pageHTMLString: pageHTMLString)
-            loadFileURL(indexURL, allowingReadAccessTo: indexURL.deletingLastPathComponent())
-        #endif
-    }
-
-    func htmlFromTemplate(_ htmlString: String) throws -> String {
-        let template = try String(contentsOf: baseURL, encoding: .utf8)
-        return template.replacingOccurrences(of: "DOWN_HTML", with: htmlString)
-    }
-
-    #if os(macOS)
-    func createTemporaryBundle(pageHTMLString: String) throws -> URL {
-        guard let bundleResourceURL = bundle.resourceURL
-            else { throw DownErrors.nonStandardBundleFormatError }
-        let indexURL = temporaryDirectoryURL.appendingPathComponent("index.html", isDirectory: false)
-
-        // If updating markdown contents, no need to re-copy bundle.
-        if !FileManager.default.fileExists(atPath: indexURL.path) {
-            // Copy bundle resources to temporary location.
-            try FileManager.default.copyItem(at: bundleResourceURL, to: temporaryDirectoryURL)
-        }
-
-        // Write generated index.html to temporary location.
-        try pageHTMLString.write(to: indexURL, atomically: true, encoding: .utf8)
-
-        return indexURL
-    }
-
-    func setupMacEnvironment() {
-        NotificationCenter.default.addObserver(self,
-                                               selector: #selector(clearTemporaryDirectory),
-                                               name: NSApplication.willTerminateNotification,
-                                               object: nil)
-    }
-
-    @objc
-    func clearTemporaryDirectory() {
-        try? FileManager.default.removeItem(at: temporaryDirectoryURL)
-    }
-    #endif
-
-}
-
-// MARK: - WKNavigationDelegate
-
-extension DownView: WKNavigationDelegate {
-    public func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) {
-        decisionHandler(.allow)
-    }
-
-    public func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
-        guard let url = navigationAction.request.url else { return decisionHandler(.allow) }
-
-        switch navigationAction.navigationType {
-        case .linkActivated:
-            if #available(iOS 11.0, macOS 10.13, *) {
-                if let scheme = url.scheme, configuration.urlSchemeHandler(forURLScheme: scheme) != nil {
-                    decisionHandler(.allow)
-                    return
-                }
-            }
-
-            decisionHandler(.cancel)
-            #if os(iOS)
-                UIApplication.shared.openURL(url)
-            #elseif os(macOS)
-                NSWorkspace.shared.open(url)
-            #endif
-        default:
-            decisionHandler(.allow)
-        }
-    }
-    
-    public func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
-        didLoadSuccessfully?()
-    }
-    
-}
-#endif

Source/cmark/cmark_version.h

@@ -1,7 +0,0 @@
-#ifndef CMARK_VERSION_H
-#define CMARK_VERSION_H
-
-#define CMARK_VERSION ((0 << 16) | (25 << 8)  | 2)
-#define CMARK_VERSION_STRING "0.25.2"
-
-#endif

Source/cmark/debug.h

@@ -1,36 +0,0 @@
-#ifndef CMARK_DEBUG_H
-#define CMARK_DEBUG_H
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-
-#ifdef NDEBUG
-#define debug(M, ...)
-#else
-#define debug(M, ...) \
-  fprintf(stderr, "DEBUG %s:%d: " M "\n", __FILE__, __LINE__, ##__VA_ARGS__)
-#endif
-
-#define clean_errno() (errno == 0 ? "None" : strerror(errno))
-
-#define log_err(M, ...) \
-  fprintf(stderr, "[ERROR] (%s:%d: errno: %s) " M "\n", __FILE__, __LINE__, \
-           clean_errno(), ##__VA_ARGS__)
-
-#define log_warn(M, ...) \
-  fprintf(stderr, "[WARN] (%s:%d: errno: %s) " M "\n", __FILE__, __LINE__, \
-           clean_errno(), ##__VA_ARGS__)
-
-#define log_info(M, ...) fprintf(stderr, "[INFO] (%s:%d) " M "\n", __FILE__, \
-            __LINE__, ##__VA_ARGS__)
-
-#define check(A, M, ...) \
-  if(!(A)) { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
-
-#define sentinel(M, ...) \
-   { log_err(M, ##__VA_ARGS__); errno=0; goto error; }
-
-#define check_debug(A, M, ...) \
-  if(!(A)) { debug(M, ##__VA_ARGS__); errno=0; goto error; }
-
-#endif

Sources/Down/AST/Nodes/BaseNode.swift

@@ -0,0 +1,37 @@
+//
+//  BaseNode.swift
+//  Down
+//
+//  Created by John Nguyen on 21.04.19.
+//
+//
+
+import Foundation
+import libcmark
+
+public class BaseNode: Node {
+
+    // MARK: - Properties
+
+    public let cmarkNode: CMarkNode
+
+    public private(set) lazy var children: [Node] = Array(childSequence)
+
+    public private(set) lazy var nestDepth: Int = {
+        var depth = 0
+        var next = cmarkNode.parent
+
+        while let current = next {
+            depth += current.type == cmarkNode.type ? 1 : 0
+            next = current.parent
+        }
+        return depth
+    }()
+
+    // MARK: - Life cycle
+
+    init(cmarkNode: CMarkNode) {
+        self.cmarkNode = cmarkNode
+    }
+
+}

Sources/Down/AST/Nodes/BlockQuote.swift

@@ -0,0 +1,21 @@
+//
+//  BlockQuote.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class BlockQuote: BaseNode {}
+
+// MARK: - Debug
+
+extension BlockQuote: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Block Quote"
+    }
+
+}

Sources/Down/AST/Nodes/ChildSequence.swift

@@ -0,0 +1,52 @@
+//
+//  ChildSequence.swift
+//  Down
+//
+//  Created by Sven Weidauer on 05.10.2020
+//
+
+import libcmark
+
+/// Sequence of child nodes.
+
+public struct ChildSequence: Sequence {
+
+    // MARK: - Properties
+
+    let node: CMarkNode
+
+    // MARK: - Methods
+
+    public func makeIterator() -> Iterator {
+        return Iterator(node: cmark_node_first_child(node))
+    }
+
+}
+
+// MARK: - Iterator
+
+public extension ChildSequence {
+
+    struct Iterator: IteratorProtocol {
+
+        // MARK: - Properties
+
+        var node: CMarkNode?
+
+        // MARK: - Methods
+
+        public mutating func next() -> Node? {
+            guard let node = node else { return nil }
+            defer { self.node = cmark_node_next(node) }
+
+            guard let result = node.wrap() else {
+                assertionFailure("Couldn't wrap node of type: \(node.type)")
+                return nil
+            }
+
+            return result
+        }
+
+    }
+
+}

Sources/Down/AST/Nodes/Code.swift

@@ -0,0 +1,29 @@
+//
+//  Code.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Code: BaseNode {
+
+    // MARK: - Properties
+
+    /// The code content, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+
+}
+
+// MARK: - Debug
+
+extension Code: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Code - \(literal ?? "nil")"
+    }
+
+}

Sources/Down/AST/Nodes/CodeBlock.swift

@@ -0,0 +1,44 @@
+//
+//  CodeBlock.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class CodeBlock: BaseNode {
+
+    // MARK: - Properties
+
+    /// The code content, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+
+    /// The fence info is an optional string that trails the opening sequence of backticks.
+    /// It can be used to provide some contextual information about the block, such as
+    /// the name of a programming language.
+    ///
+    /// For example:
+    /// ```
+    /// '''<fence info>
+    /// <literal>
+    /// '''
+    /// ```
+    ///
+
+    public private(set) lazy var fenceInfo: String? = cmarkNode.fenceInfo
+
+}
+
+// MARK: - Debug
+
+extension CodeBlock: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        let content = (literal ?? "nil").replacingOccurrences(of: "\n", with: "\\n")
+        return "Code Block - fenceInfo: \(fenceInfo ?? "nil"), content: \(content)"
+    }
+
+}

Sources/Down/AST/Nodes/CustomBlock.swift

@@ -0,0 +1,29 @@
+//
+//  CustomBlock.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class CustomBlock: BaseNode {
+
+    // MARK: - Properfies
+
+    /// The custom content, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+
+}
+
+// MARK: - Debug
+
+extension CustomBlock: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Custom Block - \(literal ?? "nil")"
+    }
+
+}

Sources/Down/AST/Nodes/CustomInline.swift

@@ -0,0 +1,28 @@
+//
+//  CustomInline.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class CustomInline: BaseNode {
+
+    // MARK: - Properties
+
+    /// The custom content, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+}
+
+// MARK: - Debug
+
+extension CustomInline: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Custom Inline - \(literal ?? "nil")"
+    }
+
+}

Sources/Down/AST/Nodes/Document.swift

@@ -0,0 +1,38 @@
+//
+//  Document.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Document: BaseNode {
+
+    // MARK: - Life cycle
+
+    deinit {
+        cmark_node_free(cmarkNode)
+    }
+
+    // MARK: - Methods
+
+    /// Accepts the given visitor and return its result.
+
+    @discardableResult
+    public func accept<T: Visitor>(_ visitor: T) -> T.Result {
+        return visitor.visit(document: self)
+    }
+
+}
+
+// MARK: - Debug
+
+extension Document: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Document"
+    }
+
+}

Sources/Down/AST/Nodes/Emphasis.swift

@@ -0,0 +1,21 @@
+//
+//  Emphasis.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Emphasis: BaseNode {}
+
+// MARK: - Debug
+
+extension Emphasis: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Emphasis"
+    }
+
+}

Sources/Down/AST/Nodes/Heading.swift

@@ -0,0 +1,28 @@
+//
+//  Heading.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Heading: BaseNode {
+
+    // MARK: - Properties
+
+    /// The level of the heading, a value between 1 and 6.
+
+    public private(set) lazy var headingLevel: Int = cmarkNode.headingLevel
+}
+
+// MARK: - Debug
+
+extension Heading: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Heading - L\(headingLevel)"
+    }
+
+}

Sources/Down/AST/Nodes/HtmlBlock.swift

@@ -0,0 +1,30 @@
+//
+//  HtmlBlock.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class HtmlBlock: BaseNode {
+
+    // MARK: - Properties
+
+    /// The html content, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+
+}
+
+// MARK: - Debug
+
+extension HtmlBlock: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        let content = (literal ?? "nil").replacingOccurrences(of: "\n", with: "\\n")
+        return "Html Block - content: \(content)"
+    }
+
+}

Sources/Down/AST/Nodes/HtmlInline.swift

@@ -0,0 +1,29 @@
+//
+//  HtmlInline.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class HtmlInline: BaseNode {
+
+    // MARK: - Properties
+
+    /// The html tag, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+
+}
+
+// MARK: - Debug
+
+extension HtmlInline: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Html Inline - \(literal ?? "nil")"
+    }
+
+}

Sources/Down/AST/Nodes/Image.swift

@@ -0,0 +1,49 @@
+//
+//  Image.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Image: BaseNode {
+
+    // MARK: - Properties
+
+    /// The title of the image, if present.
+    ///
+    /// In the example below, the first line is a reference link, with the reference at the
+    /// bottom. `<text>` is literal text belonging to children nodes. The title occurs
+    /// after the url and is optional.
+    ///
+    /// ```
+    /// ![<text>][<id>]
+    /// ...
+    /// [<id>]: <url> "<title>"
+    /// ```
+
+    public private(set) lazy var title: String? = cmarkNode.title
+
+    /// The url of the image, if present.
+    ///
+    /// For example:
+    ///
+    /// ```
+    /// ![<text>](<url>)
+    /// ```
+
+    public private(set) lazy var url: String? = cmarkNode.url
+
+}
+
+// MARK: - Debug
+
+extension Image: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Image - title: \(title ?? "nil"), url: \(url ?? "nil"))"
+    }
+
+}

Sources/Down/AST/Nodes/Item.swift

@@ -0,0 +1,21 @@
+//
+//  Item.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Item: BaseNode {}
+
+// MARK: - Debug
+
+extension Item: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Item"
+    }
+
+}

Sources/Down/AST/Nodes/LineBreak.swift

@@ -0,0 +1,21 @@
+//
+//  LineBreak.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class LineBreak: BaseNode {}
+
+// MARK: - Debug
+
+extension LineBreak: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Line Break"
+    }
+
+}

Sources/Down/AST/Nodes/Link.swift

@@ -0,0 +1,49 @@
+//
+//  Link.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Link: BaseNode {
+
+    // MARK: - Properties
+
+    /// The title of the link, if present.
+    ///
+    /// In the example below, the first line is a reference link, with the reference at the
+    /// bottom. `<text>` is literal text belonging to children nodes. The title occurs
+    /// after the url and is optional.
+    ///
+    /// ```
+    /// [<text>][<id>]
+    /// ...
+    /// [<id>]: <url> "<title>"
+    /// ```
+
+    public private(set) lazy var title: String? = cmarkNode.title
+
+    /// The url of the link, if present.
+    ///
+    /// For example:
+    ///
+    /// ```
+    /// [<text>](<url>)
+    /// ```
+
+    public private(set) lazy var url: String? = cmarkNode.url
+
+}
+
+// MARK: - Debug
+
+extension Link: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Link - title: \(title ?? "nil"), url: \(url ?? "nil"))"
+    }
+
+}

Sources/Down/AST/Nodes/List.swift

@@ -0,0 +1,107 @@
+//
+//  List.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class List: BaseNode {
+
+    // MARK: - Properties
+
+    /// The type of the list, either bullet or ordered.
+
+    public lazy var listType: ListType = {
+        guard let type = ListType(cmarkNode: cmarkNode) else {
+            assertionFailure("Unsupported or missing list type. Defaulting to .bullet.")
+            return .bullet
+        }
+
+        return type
+    }()
+
+    /// The number of items in the list.
+
+    public lazy var numberOfItems: Int = children.count
+
+    /// Whether the list is "tight".
+    ///
+    /// If any of the list items are separated by a blank line, then this property is `false`. This value is
+    /// a hint to render the list with more (loose) or less (tight) spacing between items.
+
+    public lazy var isTight: Bool = cmark_node_get_list_tight(cmarkNode) == 1
+
+    /// The list delimiter.
+
+    public lazy var delimiter: Delimiter? = Delimiter(cmarkNode.listDelimiter)
+}
+
+// MARK: - List Type
+
+public extension List {
+
+    enum Delimiter {
+        case period
+        case paren
+
+        init?(_ cmark: cmark_delim_type) {
+            switch cmark {
+            case CMARK_NO_DELIM: return nil
+            case CMARK_PERIOD_DELIM: self = .period
+            case CMARK_PAREN_DELIM: self = .paren
+            default: preconditionFailure("Invalid delim type")
+            }
+        }
+    }
+
+    enum ListType: CustomDebugStringConvertible {
+        case bullet
+        case ordered(start: Int)
+
+        // MARK: - Properties
+
+        public var debugDescription: String {
+            switch self {
+            case .bullet: return "Bullet"
+            case .ordered(let start): return "Ordered (start: \(start))"
+            }
+        }
+
+        // MARK: - Life cycle
+
+        init?(cmarkNode: CMarkNode) {
+            switch cmarkNode.listType {
+            case CMARK_BULLET_LIST: self = .bullet
+            case CMARK_ORDERED_LIST: self = .ordered(start: cmarkNode.listStart)
+            default: return nil
+            }
+        }
+
+    }
+}
+
+// MARK: - Debug
+
+extension List: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        var result = "List - type: \(listType), isTight: \(isTight)"
+        if let delim = delimiter {
+            result += ", delimiter: \(delim)"
+        }
+        return result
+    }
+
+}
+
+extension List.Delimiter: CustomDebugStringConvertible {
+    public var debugDescription: String {
+        switch self {
+        case .paren: return "paren"
+        case .period: return "period"
+        }
+    }
+}

Sources/Down/AST/Nodes/Node.swift

@@ -0,0 +1,126 @@
+//
+//  Node.swift
+//  Down
+//
+//  Created by John Nguyen on 07.04.19.
+//
+
+import Foundation
+import libcmark
+
+/// A node is a wrapper of a raw `CMarkNode` belonging to the abstract syntax tree
+/// generated by cmark.
+
+public protocol Node {
+
+    /// The wrapped node.
+
+    var cmarkNode: CMarkNode { get }
+
+    /// The wrapped child nodes.
+
+    var children: [Node] { get }
+
+}
+
+public extension Node {
+
+    /// True iff the node has a sibling that succeeds it.
+
+    var hasSuccessor: Bool {
+        return cmark_node_next(cmarkNode) != nil
+    }
+
+    /// Sequence of wrapped child nodes.
+
+    var childSequence: ChildSequence {
+        return ChildSequence(node: cmarkNode)
+    }
+
+}
+
+// MARK: - Helper extensions
+
+public typealias CMarkNode = UnsafeMutablePointer<cmark_node>
+
+public extension CMarkNode {
+
+    /// Wraps the cmark node referred to by this pointer.
+
+    func wrap() -> Node? {
+        switch type {
+        case CMARK_NODE_DOCUMENT:       return Document(cmarkNode: self)
+        case CMARK_NODE_BLOCK_QUOTE:    return BlockQuote(cmarkNode: self)
+        case CMARK_NODE_LIST:           return List(cmarkNode: self)
+        case CMARK_NODE_ITEM:           return Item(cmarkNode: self)
+        case CMARK_NODE_CODE_BLOCK:     return CodeBlock(cmarkNode: self)
+        case CMARK_NODE_HTML_BLOCK:     return HtmlBlock(cmarkNode: self)
+        case CMARK_NODE_CUSTOM_BLOCK:   return CustomBlock(cmarkNode: self)
+        case CMARK_NODE_PARAGRAPH:      return Paragraph(cmarkNode: self)
+        case CMARK_NODE_HEADING:        return Heading(cmarkNode: self)
+        case CMARK_NODE_THEMATIC_BREAK: return ThematicBreak(cmarkNode: self)
+        case CMARK_NODE_TEXT:           return Text(cmarkNode: self)
+        case CMARK_NODE_SOFTBREAK:      return SoftBreak(cmarkNode: self)
+        case CMARK_NODE_LINEBREAK:      return LineBreak(cmarkNode: self)
+        case CMARK_NODE_CODE:           return Code(cmarkNode: self)
+        case CMARK_NODE_HTML_INLINE:    return HtmlInline(cmarkNode: self)
+        case CMARK_NODE_CUSTOM_INLINE:  return CustomInline(cmarkNode: self)
+        case CMARK_NODE_EMPH:           return Emphasis(cmarkNode: self)
+        case CMARK_NODE_STRONG:         return Strong(cmarkNode: self)
+        case CMARK_NODE_LINK:           return Link(cmarkNode: self)
+        case CMARK_NODE_IMAGE:          return Image(cmarkNode: self)
+        default:                        return nil
+        }
+    }
+
+    var parent: CMarkNode? {
+        return cmark_node_parent(self)
+    }
+
+    var type: cmark_node_type {
+        return cmark_node_get_type(self)
+    }
+
+    var literal: String? {
+        return String(cString: cmark_node_get_literal(self))
+    }
+
+    var fenceInfo: String? {
+        return String(cString: cmark_node_get_fence_info(self))
+    }
+
+    var headingLevel: Int {
+        return Int(cmark_node_get_heading_level(self))
+    }
+
+    var listType: cmark_list_type {
+        return cmark_node_get_list_type(self)
+    }
+
+    var listStart: Int {
+        return Int(cmark_node_get_list_start(self))
+    }
+
+    var listDelimiter: cmark_delim_type {
+        return cmark_node_get_list_delim(self)
+    }
+
+    var url: String? {
+        return String(cString: cmark_node_get_url(self))
+    }
+
+    var title: String? {
+        return String(cString: cmark_node_get_title(self))
+    }
+}
+
+private extension String {
+
+    init?(cString: UnsafePointer<Int8>?) {
+        guard let unwrapped = cString else { return nil }
+        let result = String(cString: unwrapped)
+        guard !result.isEmpty else { return nil }
+        self = result
+    }
+
+}

Sources/Down/AST/Nodes/Paragraph.swift

@@ -0,0 +1,21 @@
+//
+//  Paragraph.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Paragraph: BaseNode {}
+
+// MARK: - Debug
+
+extension Paragraph: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Paragraph"
+    }
+
+}

Sources/Down/AST/Nodes/SoftBreak.swift

@@ -0,0 +1,21 @@
+//
+//  SoftBreak.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class SoftBreak: BaseNode {}
+
+// MARK: - Debug
+
+extension SoftBreak: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Soft Break"
+    }
+
+}

Sources/Down/AST/Nodes/Strong.swift

@@ -0,0 +1,21 @@
+//
+//  Strong.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Strong: BaseNode {}
+
+// MARK: - Debug
+
+extension Strong: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Strong"
+    }
+
+}

Sources/Down/AST/Nodes/Text.swift

@@ -0,0 +1,29 @@
+//
+//  Text.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class Text: BaseNode {
+
+    // MARK: - Properties
+
+    /// The text content, if present.
+
+    public private(set) lazy var literal: String? = cmarkNode.literal
+
+}
+
+// MARK: - Debug
+
+extension Text: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Text - \(literal ?? "nil")"
+    }
+
+}

Sources/Down/AST/Nodes/ThematicBreak.swift

@@ -0,0 +1,21 @@
+//
+//  ThematicBreak.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+import libcmark
+
+public class ThematicBreak: BaseNode {}
+
+// MARK: - Debug
+
+extension ThematicBreak: CustomDebugStringConvertible {
+
+    public var debugDescription: String {
+        return "Thematic Break"
+    }
+
+}

Sources/Down/AST/Styling/Attribute Collections/ColorCollection.swift

@@ -0,0 +1,97 @@
+//
+//  ColorCollection.swift
+//  Down
+//
+//  Created by John Nguyen on 27.07.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+public typealias DownColor = UIColor
+
+#elseif canImport(AppKit)
+
+import AppKit
+public typealias DownColor = NSColor
+
+#endif
+
+public protocol ColorCollection {
+
+    var heading1: DownColor { get }
+    var heading2: DownColor { get }
+    var heading3: DownColor { get }
+    var heading4: DownColor { get }
+    var heading5: DownColor { get }
+    var heading6: DownColor { get }
+    var body: DownColor { get }
+    var code: DownColor { get }
+    var link: DownColor { get }
+    var quote: DownColor { get }
+    var quoteStripe: DownColor { get }
+    var thematicBreak: DownColor { get }
+    var listItemPrefix: DownColor { get }
+    var codeBlockBackground: DownColor { get }
+
+}
+
+public struct StaticColorCollection: ColorCollection {
+
+    // MARK: - Properties
+
+    public var heading1: DownColor
+    public var heading2: DownColor
+    public var heading3: DownColor
+    public var heading4: DownColor
+    public var heading5: DownColor
+    public var heading6: DownColor
+    public var body: DownColor
+    public var code: DownColor
+    public var link: DownColor
+    public var quote: DownColor
+    public var quoteStripe: DownColor
+    public var thematicBreak: DownColor
+    public var listItemPrefix: DownColor
+    public var codeBlockBackground: DownColor
+
+    // MARK: - Life cycle
+
+    public init(
+        heading1: DownColor = .black,
+        heading2: DownColor = .black,
+        heading3: DownColor = .black,
+        heading4: DownColor = .black,
+        heading5: DownColor = .black,
+        heading6: DownColor = .black,
+        body: DownColor = .black,
+        code: DownColor = .black,
+        link: DownColor = .blue,
+        quote: DownColor = .darkGray,
+        quoteStripe: DownColor = .darkGray,
+        thematicBreak: DownColor = .init(white: 0.9, alpha: 1),
+        listItemPrefix: DownColor = .lightGray,
+        codeBlockBackground: DownColor = .init(red: 0.96, green: 0.97, blue: 0.98, alpha: 1)
+    ) {
+        self.heading1 = heading1
+        self.heading2 = heading2
+        self.heading3 = heading3
+        self.heading4 = heading4
+        self.heading5 = heading5
+        self.heading6 = heading6
+        self.body = body
+        self.code = code
+        self.link = link
+        self.quote = quote
+        self.quoteStripe = quoteStripe
+        self.thematicBreak = thematicBreak
+        self.listItemPrefix = listItemPrefix
+        self.codeBlockBackground = codeBlockBackground
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Attribute Collections/FontCollection.swift

@@ -0,0 +1,77 @@
+//
+//  FontCollection.swift
+//  Down
+//
+//  Created by John Nguyen on 22.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+public typealias DownFont = UIFont
+
+#elseif canImport(AppKit)
+
+import AppKit
+public typealias DownFont = NSFont
+
+#endif
+
+public protocol FontCollection {
+
+    var heading1: DownFont { get }
+    var heading2: DownFont { get }
+    var heading3: DownFont { get }
+    var heading4: DownFont { get }
+    var heading5: DownFont { get }
+    var heading6: DownFont { get }
+    var body: DownFont { get }
+    var code: DownFont { get }
+    var listItemPrefix: DownFont { get }
+
+}
+
+public struct StaticFontCollection: FontCollection {
+
+    // MARK: - Properties
+
+    public var heading1: DownFont
+    public var heading2: DownFont
+    public var heading3: DownFont
+    public var heading4: DownFont
+    public var heading5: DownFont
+    public var heading6: DownFont
+    public var body: DownFont
+    public var code: DownFont
+    public var listItemPrefix: DownFont
+
+    // MARK: - Life cycle
+
+    public init(
+        heading1: DownFont = .boldSystemFont(ofSize: 28),
+        heading2: DownFont = .boldSystemFont(ofSize: 24),
+        heading3: DownFont = .boldSystemFont(ofSize: 20),
+        heading4: DownFont = .boldSystemFont(ofSize: 20),
+        heading5: DownFont = .boldSystemFont(ofSize: 20),
+        heading6: DownFont = .boldSystemFont(ofSize: 20),
+        body: DownFont = .systemFont(ofSize: 17),
+        code: DownFont = DownFont(name: "menlo", size: 17) ?? .systemFont(ofSize: 17),
+        listItemPrefix: DownFont = DownFont.monospacedDigitSystemFont(ofSize: 17, weight: .regular)
+    ) {
+        self.heading1 = heading1
+        self.heading2 = heading2
+        self.heading3 = heading3
+        self.heading4 = heading4
+        self.heading5 = heading5
+        self.heading6 = heading6
+        self.body = body
+        self.code = code
+        self.listItemPrefix = listItemPrefix
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Attribute Collections/ParagraphStyleCollection.swift

@@ -0,0 +1,74 @@
+//
+//  ParagraphStyleCollection.swift
+//  Down
+//
+//  Created by John Nguyen on 27.07.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+public protocol ParagraphStyleCollection {
+
+    var heading1: NSParagraphStyle { get }
+    var heading2: NSParagraphStyle { get }
+    var heading3: NSParagraphStyle { get }
+    var heading4: NSParagraphStyle { get }
+    var heading5: NSParagraphStyle { get }
+    var heading6: NSParagraphStyle { get }
+    var body: NSParagraphStyle { get }
+    var code: NSParagraphStyle { get }
+
+}
+
+public struct StaticParagraphStyleCollection: ParagraphStyleCollection {
+
+    // MARK: - Properties
+
+    public var heading1: NSParagraphStyle
+    public var heading2: NSParagraphStyle
+    public var heading3: NSParagraphStyle
+    public var heading4: NSParagraphStyle
+    public var heading5: NSParagraphStyle
+    public var heading6: NSParagraphStyle
+    public var body: NSParagraphStyle
+    public var code: NSParagraphStyle
+
+    // MARK: - Life cycle
+
+    public init() {
+        let headingStyle = NSMutableParagraphStyle()
+        headingStyle.paragraphSpacing = 8
+
+        let bodyStyle = NSMutableParagraphStyle()
+        bodyStyle.paragraphSpacingBefore = 8
+        bodyStyle.paragraphSpacing = 8
+        bodyStyle.lineSpacing = 8
+
+        let codeStyle = NSMutableParagraphStyle()
+        codeStyle.paragraphSpacingBefore = 8
+        codeStyle.paragraphSpacing = 8
+
+        heading1 = headingStyle
+        heading2 = headingStyle
+        heading3 = headingStyle
+        heading4 = headingStyle
+        heading5 = headingStyle
+        heading6 = headingStyle
+        body = bodyStyle
+        code = codeStyle
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Custom Attributes/BlockBackgroundColorAttribute.swift

@@ -0,0 +1,36 @@
+//
+//  BlockBackgroundColorAttribute.swift
+//  Down
+//
+//  Created by John Nguyen on 11.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+struct BlockBackgroundColorAttribute {
+
+    // MARK: - Properties
+
+    var color: DownColor
+    var inset: CGFloat
+
+}
+
+extension NSAttributedString.Key {
+
+    static let blockBackgroundColor = NSAttributedString.Key("blockBackgroundColor")
+
+}
+
+#endif

Sources/Down/AST/Styling/Custom Attributes/QuoteStripeAttribute.swift

@@ -0,0 +1,64 @@
+//
+//  QuoteStripeAttrbute.swift
+//  Down
+//
+//  Created by John Nguyen on 03.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+struct QuoteStripeAttribute {
+
+    // MARK: - Properties
+
+    var color: DownColor
+    var thickness: CGFloat
+    var spacingAfter: CGFloat
+    var locations: [CGFloat]
+
+    var layoutWidth: CGFloat {
+        return thickness + spacingAfter
+    }
+
+    // MARK: - Life cycle
+
+    init(color: DownColor, thickness: CGFloat, spacingAfter: CGFloat, locations: [CGFloat]) {
+        self.color = color
+        self.thickness = thickness
+        self.spacingAfter = spacingAfter
+        self.locations = locations
+    }
+
+    init(level: Int, color: DownColor, options: QuoteStripeOptions) {
+        self.init(color: color, thickness: options.thickness, spacingAfter: options.spacingAfter, locations: [])
+        locations = (0..<level).map { CGFloat($0) * layoutWidth }
+    }
+
+    // MARK: - Methods
+
+    func indented(by indentation: CGFloat) -> QuoteStripeAttribute {
+        var copy = self
+        copy.locations = locations.map { $0 + indentation }
+        return copy
+    }
+
+}
+
+extension NSAttributedString.Key {
+
+    static let quoteStripe = NSAttributedString.Key(rawValue: "quoteStripe")
+
+}
+
+#endif

Sources/Down/AST/Styling/Custom Attributes/ThematicBreakAttribute.swift

@@ -0,0 +1,36 @@
+//
+//  ThematicBreaAttributek.swift
+//  Down
+//
+//  Created by John Nguyen on 02.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+struct ThematicBreakAttribute {
+
+    // MARK: - Properties
+
+    var thickness: CGFloat
+    var color: DownColor
+
+}
+
+extension NSAttributedString.Key {
+
+    static let thematicBreak = NSAttributedString.Key(rawValue: "thematicBreak")
+
+}
+
+#endif

Sources/Down/AST/Styling/Helpers/Extensions/CGPoint+Translate.swift

@@ -0,0 +1,29 @@
+//
+//  CGPoint+Translate.swift
+//  Down
+//
+//  Created by John Nguyen on 12.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+extension CGPoint {
+
+    func translated(by point: CGPoint) -> CGPoint {
+        return CGPoint(x: x + point.x, y: y + point.y)
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Helpers/Extensions/CGRect+Helpers.swift

@@ -0,0 +1,33 @@
+//
+//  CGRect+Helpers.swift
+//  Down
+//
+//  Created by John Nguyen on 12.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+extension CGRect {
+
+    init(minX: CGFloat, minY: CGFloat, maxX: CGFloat, maxY: CGFloat) {
+        self.init(x: minX, y: minY, width: maxX - minX, height: maxY - minY)
+    }
+
+    func translated(by point: CGPoint) -> CGRect {
+        return CGRect(origin: origin.translated(by: point), size: size)
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Helpers/Extensions/NSAttributedString+Helpers.swift

@@ -0,0 +1,79 @@
+//
+//  NSAttributedString+Helpers.swift
+//  Down
+//
+//  Created by John Nguyen on 22.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+
+extension NSAttributedString {
+
+    typealias Attributes = [NSAttributedString.Key: Any]
+
+    // MARK: - Ranges
+
+    var wholeRange: NSRange {
+        return NSRange(location: 0, length: length)
+    }
+
+    func ranges(of key: Key) -> [NSRange] {
+        return ranges(of: key, in: wholeRange)
+    }
+
+    func ranges(of key: Key, in range: NSRange) -> [NSRange] {
+        return ranges(for: key, in: range, where: { $0 != nil })
+    }
+
+    func rangesMissingAttribute(for key: Key) -> [NSRange] {
+        return rangesMissingAttribute(for: key, in: wholeRange)
+    }
+
+    func rangesMissingAttribute(for key: Key, in range: NSRange) -> [NSRange] {
+        return ranges(for: key, in: range, where: { $0 == nil })
+    }
+
+    private func ranges(for key: Key, in range: NSRange, where predicate: (Any?) -> Bool) -> [NSRange] {
+        var ranges = [NSRange]()
+
+        enumerateAttribute(key, in: range, options: []) { value, attrRange, _ in
+            if predicate(value) {
+                ranges.append(attrRange)
+            }
+        }
+
+        return ranges
+    }
+
+    func paragraphRanges() -> [NSRange] {
+        guard length > 0 else { return [] }
+
+        func nextParagraphRange(at location: Int) -> NSRange {
+            return NSString(string: string).paragraphRange(for: NSRange(location: location, length: 1))
+        }
+
+        var result = [nextParagraphRange(at: 0)]
+
+        while let currentLocation = result.last?.upperBound, currentLocation < length {
+            result.append(nextParagraphRange(at: currentLocation))
+        }
+
+        return result.filter { $0.length > 1 }
+    }
+
+    // MARK: - Enumerate attributes
+
+    func enumerateAttributes<A>(for key: Key, block: (_ attr: A, _ range: NSRange) -> Void) {
+        enumerateAttributes(for: key, in: wholeRange, block: block)
+    }
+
+    func enumerateAttributes<A>(for key: Key, in range: NSRange, block: (_ attr: A, _ range: NSRange) -> Void) {
+        enumerateAttribute(key, in: range, options: []) { value, range, _ in
+            if let value = value as? A {
+                block(value, range)
+            }
+        }
+    }
+
+}

Sources/Down/AST/Styling/Helpers/Extensions/NSMutableAttributedString+Attributes.swift

@@ -0,0 +1,58 @@
+//
+//  NSMutableAttributedString+Attributes.swift
+//  Down
+//
+//  Created by John Nguyen on 22.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+
+extension NSMutableAttributedString {
+
+    func setAttributes(_ attrs: Attributes) {
+        setAttributes(attrs, range: wholeRange)
+    }
+
+    func addAttributes(_ attrs: Attributes) {
+        addAttributes(attrs, range: wholeRange)
+    }
+
+    func addAttribute(for key: Key, value: Any) {
+        addAttribute(key, value: value, range: wholeRange)
+    }
+
+    func removeAttribute(for key: Key) {
+        removeAttribute(key, range: wholeRange)
+    }
+
+    func replaceAttribute(for key: Key, value: Any) {
+        replaceAttribute(for: key, value: value, inRange: wholeRange)
+    }
+
+    func replaceAttribute(for key: Key, value: Any, inRange range: NSRange) {
+        removeAttribute(key, range: range)
+        addAttribute(key, value: value, range: range)
+    }
+
+    func updateExistingAttributes<A>(for key: Key, using transform: (A) -> A) {
+        updateExistingAttributes(for: key, in: wholeRange, using: transform)
+    }
+
+    func updateExistingAttributes<A>(for key: Key, in range: NSRange, using transform: (A) -> A) {
+        var existingValues = [(value: A, range: NSRange)]()
+        enumerateAttributes(for: key, in: range) { existingValues.append(($0, $1)) }
+        existingValues.forEach { addAttribute(key, value: transform($0.0), range: $0.1) }
+    }
+
+    func addAttributeInMissingRanges<A>(for key: Key, value: A) {
+        addAttributeInMissingRanges(for: key, value: value, within: wholeRange)
+    }
+
+    func addAttributeInMissingRanges<A>(for key: Key, value: A, within range: NSRange) {
+        rangesMissingAttribute(for: key, in: range).forEach {
+            addAttribute(key, value: value, range: $0)
+        }
+    }
+
+}

Sources/Down/AST/Styling/Helpers/Extensions/UIFont+Traits.swift

@@ -0,0 +1,94 @@
+//
+//  UIFont+Traits.swift
+//  Down
+//
+//  Created by John Nguyen on 22.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+public typealias DownFontDescriptor = UIFontDescriptor
+
+#elseif canImport(AppKit)
+
+import AppKit
+public typealias DownFontDescriptor = NSFontDescriptor
+
+#endif
+
+extension DownFont {
+
+    var isStrong: Bool {
+        return contains(.strong)
+    }
+
+    var isEmphasized: Bool {
+        return contains(.emphasis)
+    }
+
+    var isMonospace: Bool {
+        return contains(.monoSpace)
+    }
+
+    var strong: DownFont {
+        return with(.strong) ?? self
+    }
+
+    var emphasis: DownFont {
+        return with(.emphasis) ?? self
+    }
+
+    var monospace: DownFont {
+        return with(.monoSpace) ?? self
+    }
+
+    private func with(_ trait: DownFontDescriptor.SymbolicTraits) -> DownFont? {
+        guard !contains(trait) else { return self }
+
+        var traits = fontDescriptor.symbolicTraits
+        traits.insert(trait)
+
+        #if canImport(UIKit)
+        guard let newDescriptor = fontDescriptor.withSymbolicTraits(traits) else { return self }
+        return DownFont(descriptor: newDescriptor, size: pointSize)
+
+        #elseif canImport(AppKit)
+        let newDescriptor = fontDescriptor.withSymbolicTraits(traits)
+        return DownFont(descriptor: newDescriptor, size: pointSize)
+
+        #endif
+    }
+
+    private func contains(_ trait: DownFontDescriptor.SymbolicTraits) -> Bool {
+        return fontDescriptor.symbolicTraits.contains(trait)
+    }
+
+}
+
+#if canImport(UIKit)
+
+private extension DownFontDescriptor.SymbolicTraits {
+
+    static let strong = DownFontDescriptor.SymbolicTraits.traitBold
+    static let emphasis = DownFontDescriptor.SymbolicTraits.traitItalic
+    static let monoSpace = DownFontDescriptor.SymbolicTraits.traitMonoSpace
+
+}
+
+#elseif canImport(AppKit)
+
+private extension DownFontDescriptor.SymbolicTraits {
+
+    static let strong = DownFontDescriptor.SymbolicTraits.bold
+    static let emphasis = DownFontDescriptor.SymbolicTraits.italic
+    static let monoSpace = DownFontDescriptor.SymbolicTraits.monoSpace
+
+}
+
+#endif
+
+#endif

Sources/Down/AST/Styling/Helpers/ListItemParagraphStyler.swift

@@ -0,0 +1,115 @@
+//
+//  ParagraphStyler.swift
+//  Down
+//
+//  Created by John Nguyen on 25.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+/// A convenient class used to format lists, such that list item prefixes
+/// are right aligned and list item content left aligns.
+
+public class ListItemParagraphStyler {
+
+    // MARK: - Properties
+
+    public var indentation: CGFloat {
+        return largestPrefixWidth + options.spacingAfterPrefix
+    }
+
+    /// The paragraph style intended for all paragraphs excluding the first.
+
+    public var trailingParagraphStyle: NSParagraphStyle {
+        let contentIndentation = indentation
+        let style = baseStyle
+        style.firstLineHeadIndent = contentIndentation
+        style.headIndent = contentIndentation
+        return style
+    }
+
+    private let options: ListItemOptions
+    private let largestPrefixWidth: CGFloat
+
+    private var baseStyle: NSMutableParagraphStyle {
+        let style = NSMutableParagraphStyle()
+        style.paragraphSpacingBefore = options.spacingAbove
+        style.paragraphSpacing = options.spacingBelow
+        style.alignment = options.alignment
+        return style
+    }
+
+    // MARK: - Life cycle
+
+    public init(options: ListItemOptions, prefixFont: DownFont) {
+        self.options = options
+        self.largestPrefixWidth = prefixFont.widthOfNumberedPrefix(digits: options.maxPrefixDigits)
+    }
+
+    // MARK: - Methods
+
+    /// The paragraph style intended for the first paragraph of the list item.
+    /// 
+    /// - Parameter prefixWidth: the width (in points) of the list item prefix.
+
+    public func leadingParagraphStyle(prefixWidth: CGFloat) -> NSParagraphStyle {
+        let contentIndentation = indentation
+        let prefixIndentation: CGFloat = contentIndentation - options.spacingAfterPrefix - prefixWidth
+        let prefixSpill = max(0, prefixWidth - largestPrefixWidth)
+        let firstLineContentIndentation = contentIndentation + prefixSpill
+
+        let style = baseStyle
+        style.firstLineHeadIndent = prefixIndentation
+        style.tabStops = [tabStop(at: firstLineContentIndentation)]
+        style.headIndent = contentIndentation
+        return style
+    }
+
+    private func tabStop(at location: CGFloat) -> NSTextTab {
+        return NSTextTab(textAlignment: options.alignment, location: location, options: [:])
+    }
+
+}
+
+// MARK: - Helpers
+
+private extension DownFont {
+
+    func widthOfNumberedPrefix(digits: UInt) -> CGFloat {
+        return widthOfLargestDigit * CGFloat(digits) + widthOfPeriod
+    }
+
+    private var widthOfLargestDigit: CGFloat {
+        return Int.decimalDigits
+            .map { NSAttributedString(string: "\($0)", attributes: [.font: self]).size().width }
+            .max()!
+    }
+
+    private var widthOfPeriod: CGFloat {
+        return NSAttributedString(string: ".", attributes: [.font: self])
+            .size()
+            .width
+    }
+
+}
+
+private extension Int {
+
+    static var decimalDigits: [Int] {
+        return Array(0...9)
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Layout Managers/DownDebugLayoutManager.swift

@@ -0,0 +1,64 @@
+//
+//  DownDebugLayoutManager.swift
+//  Down
+//
+//  Created by John Nguyen on 06.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+/// A layout manager that draws the line fragments.
+///
+/// Line fragments are the areas with a document that contain lines of text. There
+/// are two types.
+///
+/// 1. A *line rect* (drawn in red) indicates the maximum rect enclosing the line.
+/// This inlcudes not only the textual content, but also the padding (if any) around that text.
+/// 2. A *line used rect* (drawn in blue) is the smallest rect enclosing the textual content.
+///
+/// The visualization of these rects is useful when determining the paragraph styles
+/// of a `DownStyler`.
+///
+/// Insert this into a TextKit stack manually, or use the provided `DownDebugTextView`.
+
+public class DownDebugLayoutManager: DownLayoutManager {
+
+    // MARK: - Drawing
+
+    override public func drawGlyphs(forGlyphRange glyphsToShow: NSRange, at origin: CGPoint) {
+        super.drawGlyphs(forGlyphRange: glyphsToShow, at: origin)
+        drawLineFragments(forGlyphRange: glyphsToShow, at: origin)
+    }
+
+    private func drawLineFragments(forGlyphRange glyphsToShow: NSRange, at origin: CGPoint) {
+        enumerateLineFragments(forGlyphRange: glyphsToShow) { rect, usedRect, _, _, _ in
+            [(usedRect, DownColor.blue), (rect, DownColor.red)].forEach { rectToDraw, color in
+                let adjustedRect = rectToDraw.translated(by: origin)
+                self.drawRect(adjustedRect, color: color.cgColor)
+            }
+        }
+    }
+
+    private func drawRect(_ rect: CGRect, color: CGColor) {
+        guard let context = context else { return }
+        push(context: context)
+        defer { popContext() }
+
+        context.setStrokeColor(color)
+        context.stroke(rect)
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Layout Managers/DownLayoutManager.swift

@@ -0,0 +1,231 @@
+//
+//  DownLayoutManager.swift
+//  Down
+//
+//  Created by John Nguyen on 02.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+/// A layout manager capable of drawing the custom attributes set by the `DownStyler`.
+///
+/// Insert this into a TextKit stack manually, or use the provided `DownTextView`.
+
+public class DownLayoutManager: NSLayoutManager {
+
+    // MARK: - Graphic context
+
+    #if canImport(UIKit)
+    var context: CGContext? {
+        return UIGraphicsGetCurrentContext()
+    }
+
+    func push(context: CGContext) {
+        UIGraphicsPushContext(context)
+    }
+
+    func popContext() {
+        UIGraphicsPopContext()
+    }
+
+    #elseif canImport(AppKit)
+    var context: CGContext? {
+        return NSGraphicsContext.current?.cgContext
+    }
+
+    func push(context: CGContext) {
+        NSGraphicsContext.saveGraphicsState()
+    }
+
+    func popContext() {
+        NSGraphicsContext.restoreGraphicsState()
+    }
+
+    #endif
+
+    // MARK: - Drawing
+
+    override public func drawGlyphs(forGlyphRange glyphsToShow: NSRange, at origin: CGPoint) {
+        drawCustomBackgrounds(forGlyphRange: glyphsToShow, at: origin)
+        super.drawGlyphs(forGlyphRange: glyphsToShow, at: origin)
+        drawCustomAttributes(forGlyphRange: glyphsToShow, at: origin)
+    }
+
+    private func drawCustomBackgrounds(forGlyphRange glyphsToShow: NSRange, at origin: CGPoint) {
+        guard let context = context else { return }
+        push(context: context)
+        defer { popContext() }
+
+        guard let textStorage = textStorage else { return }
+
+        let characterRange = self.characterRange(forGlyphRange: glyphsToShow, actualGlyphRange: nil)
+
+        textStorage.enumerateAttributes(for: .blockBackgroundColor,
+                                        in: characterRange) { (attr: BlockBackgroundColorAttribute, blockRange) in
+            let inset = attr.inset
+
+            context.setFillColor(attr.color.cgColor)
+
+            let allBlockColorRanges = glyphRanges(for: .blockBackgroundColor,
+                                                  in: textStorage,
+                                                  inCharacterRange: blockRange)
+
+            let glyphRange = self.glyphRange(forCharacterRange: blockRange, actualCharacterRange: nil)
+
+            enumerateLineFragments(forGlyphRange: glyphRange) { lineRect, lineUsedRect, container, lineGlyphRange, _ in
+                let isLineStartOfBlock = allBlockColorRanges.contains {
+                    lineGlyphRange.overlapsStart(of: $0)
+                }
+
+                let isLineEndOfBlock = allBlockColorRanges.contains {
+                    lineGlyphRange.overlapsEnd(of: $0)
+                }
+
+                let minX = lineUsedRect.minX + container.lineFragmentPadding - inset
+                let maxX = lineRect.maxX
+                let minY = isLineStartOfBlock ? lineUsedRect.minY - inset : lineRect.minY
+                let maxY = isLineEndOfBlock ? lineUsedRect.maxY + inset : lineUsedRect.maxY
+                let blockRect = CGRect(minX: minX, minY: minY, maxX: maxX, maxY: maxY).translated(by: origin)
+
+                context.fill(blockRect)
+            }
+        }
+    }
+
+    private func drawCustomAttributes(forGlyphRange glyphsToShow: NSRange, at origin: CGPoint) {
+        let characterRange = self.characterRange(forGlyphRange: glyphsToShow, actualGlyphRange: nil)
+        drawThematicBreakIfNeeded(in: characterRange, at: origin)
+        drawQuoteStripeIfNeeded(in: characterRange, at: origin)
+    }
+
+    private func drawThematicBreakIfNeeded(in characterRange: NSRange, at origin: CGPoint) {
+        guard let context = context else { return }
+        push(context: context)
+        defer { popContext() }
+
+        textStorage?.enumerateAttributes(for: .thematicBreak,
+                                         in: characterRange) { (attr: ThematicBreakAttribute, range) in
+
+            let firstGlyphIndex = glyphIndexForCharacter(at: range.lowerBound)
+
+            let lineRect = lineFragmentRect(forGlyphAt: firstGlyphIndex, effectiveRange: nil)
+            let usedRect = lineFragmentUsedRect(forGlyphAt: firstGlyphIndex, effectiveRange: nil)
+
+            let lineStart = usedRect.minX + fragmentPadding(forGlyphAt: firstGlyphIndex)
+
+            let width = lineRect.width - lineStart
+            let height = lineRect.height
+
+            let boundingRect = CGRect(x: lineStart, y: lineRect.minY, width: width, height: height)
+            let adjustedLineRect = boundingRect.translated(by: origin)
+
+            drawThematicBreak(with: context, in: adjustedLineRect, attr: attr)
+        }
+    }
+
+    private func fragmentPadding(forGlyphAt glyphIndex: Int) -> CGFloat {
+        let textContainer = self.textContainer(forGlyphAt: glyphIndex, effectiveRange: nil)
+        return textContainer?.lineFragmentPadding ?? 0
+    }
+
+    private func drawThematicBreak(with context: CGContext, in rect: CGRect, attr: ThematicBreakAttribute) {
+        context.setStrokeColor(attr.color.cgColor)
+        context.setLineWidth(attr.thickness)
+        context.move(to: CGPoint(x: rect.minX, y: rect.midY))
+        context.addLine(to: CGPoint(x: rect.maxX, y: rect.midY))
+        context.strokePath()
+    }
+
+    private func drawQuoteStripeIfNeeded(in characterRange: NSRange, at origin: CGPoint) {
+        guard let context = context else { return }
+        push(context: context)
+        defer { popContext() }
+
+        textStorage?.enumerateAttributes(for: .quoteStripe,
+                                         in: characterRange) { (attr: QuoteStripeAttribute, quoteRange) in
+
+            context.setFillColor(attr.color.cgColor)
+
+            let glyphRangeOfQuote = self.glyphRange(forCharacterRange: quoteRange, actualCharacterRange: nil)
+
+            enumerateLineFragments(forGlyphRange: glyphRangeOfQuote) { lineRect, _, container, _, _ in
+                let locations = attr.locations.map {
+                    CGPoint(x: $0 + container.lineFragmentPadding, y: 0)
+                        .translated(by: lineRect.origin)
+                        .translated(by: origin)
+                }
+
+                let stripeSize = CGSize(width: attr.thickness, height: lineRect.height)
+                self.drawQuoteStripes(with: context, locations: locations, size: stripeSize)
+            }
+        }
+    }
+
+    private func drawQuoteStripes(with context: CGContext, locations: [CGPoint], size: CGSize) {
+        locations.forEach {
+            let stripeRect = CGRect(origin: $0, size: size)
+            context.fill(stripeRect)
+        }
+    }
+
+    private func glyphRanges(for key: NSAttributedString.Key,
+                             in storage: NSTextStorage,
+                             inCharacterRange range: NSRange) -> [NSRange] {
+
+        return storage
+            .ranges(of: key, in: range)
+            .map { self.glyphRange(forCharacterRange: $0, actualCharacterRange: nil) }
+            .mergeNeighbors()
+    }
+}
+
+// MARK: - Helpers
+
+private extension NSRange {
+
+    func overlapsStart(of range: NSRange) -> Bool {
+        return lowerBound <= range.lowerBound && upperBound > range.lowerBound
+    }
+
+    func overlapsEnd(of range: NSRange) -> Bool {
+        return lowerBound < range.upperBound && upperBound >= range.upperBound
+    }
+
+}
+
+private extension Array where Element == NSRange {
+
+    func mergeNeighbors() -> [Element] {
+        let sorted = self.sorted { $0.lowerBound <= $1.lowerBound }
+
+        let result = sorted.reduce(into: [NSRange]()) { acc, next in
+            guard let last = acc.popLast() else {
+                acc.append(next)
+                return
+            }
+
+            guard last.upperBound == next.lowerBound else {
+                acc.append(contentsOf: [last, next])
+                return
+            }
+
+            acc.append(NSRange(location: last.lowerBound, length: next.upperBound - last.lowerBound))
+        }
+
+        return result
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Options/CodeBlockOptions.swift

@@ -0,0 +1,35 @@
+//
+//  CodeBlockOptions.swift
+//  Down
+//
+//  Created by John Nguyen on 12.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+public struct CodeBlockOptions {
+
+    // MARK: - Properties
+
+    public var containerInset: CGFloat
+
+    // MARK: - Life cycle
+
+    public init(containerInset: CGFloat = 8) {
+        self.containerInset = containerInset
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Options/ListItemOptions.swift

@@ -0,0 +1,48 @@
+//
+//  ListItemOptions.swift
+//  Down
+//
+//  Created by John Nguyen on 04.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+public struct ListItemOptions {
+
+    // MARK: - Properties
+
+    public var maxPrefixDigits: UInt
+    public var spacingAfterPrefix: CGFloat
+    public var spacingAbove: CGFloat
+    public var spacingBelow: CGFloat
+    public var alignment: NSTextAlignment
+
+    // MARK: - Life cycle
+
+    public init(maxPrefixDigits: UInt = 2,
+                spacingAfterPrefix: CGFloat = 8,
+                spacingAbove: CGFloat = 4,
+                spacingBelow: CGFloat = 8,
+                alignment: NSTextAlignment = .natural) {
+
+        self.maxPrefixDigits = maxPrefixDigits
+        self.spacingAfterPrefix = spacingAfterPrefix
+        self.spacingAbove = spacingAbove
+        self.spacingBelow = spacingBelow
+        self.alignment = alignment
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Options/QuoteStripeOptions.swift

@@ -0,0 +1,37 @@
+//
+//  QuoteStripeOptions.swift
+//  Down
+//
+//  Created by John Nguyen on 04.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+public struct QuoteStripeOptions {
+
+    // MARK: - Properties
+
+    public var thickness: CGFloat
+    public var spacingAfter: CGFloat
+
+    // MARK: - Life cycle
+
+    public init(thickness: CGFloat = 2, spacingAfter: CGFloat = 8) {
+        self.thickness = thickness
+        self.spacingAfter = spacingAfter
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Options/ThematicBreakOptions.swift

@@ -0,0 +1,37 @@
+//
+//  ThematicBreakOptions.swift
+//  Down
+//
+//  Created by John Nguyen on 04.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+public struct ThematicBreakOptions {
+
+    // MARK: - Properties
+
+    public var thickness: CGFloat
+    public var indentation: CGFloat
+
+    // MARK: - Life cycle
+
+    public init(thickness: CGFloat = 1, indentation: CGFloat = 0) {
+        self.thickness = thickness
+        self.indentation = indentation
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Stylers/DownStyler.swift

@@ -0,0 +1,308 @@
+//
+//  DownStyler.swift
+//  Down
+//
+//  Created by John Nguyen on 22.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+/// A default `Styler` implementation that supports a variety of configurable
+/// properties for font, text color and paragraph styling, as well as formatting
+/// of nested lists and quotes.
+
+open class DownStyler: Styler {
+
+    // MARK: - Properties
+
+    public let fonts: FontCollection
+    public let colors: ColorCollection
+    public let paragraphStyles: ParagraphStyleCollection
+
+    public let quoteStripeOptions: QuoteStripeOptions
+    public let thematicBreakOptions: ThematicBreakOptions
+    public let codeBlockOptions: CodeBlockOptions
+
+    private let itemParagraphStyler: ListItemParagraphStyler
+
+    private var listPrefixAttributes: [NSAttributedString.Key: Any] {[
+        .font: fonts.listItemPrefix,
+        .foregroundColor: colors.listItemPrefix]
+    }
+
+    // MARK: - Life cycle
+
+    public init(configuration: DownStylerConfiguration = DownStylerConfiguration()) {
+        fonts = configuration.fonts
+        colors = configuration.colors
+        paragraphStyles = configuration.paragraphStyles
+        quoteStripeOptions = configuration.quoteStripeOptions
+        thematicBreakOptions = configuration.thematicBreakOptions
+        codeBlockOptions = configuration.codeBlockOptions
+        itemParagraphStyler = ListItemParagraphStyler(options: configuration.listItemOptions,
+                                                      prefixFont: fonts.listItemPrefix)
+    }
+
+    // MARK: - Styling
+
+    open func style(document str: NSMutableAttributedString) {
+
+    }
+
+    open func style(blockQuote str: NSMutableAttributedString, nestDepth: Int) {
+        let stripeAttribute = QuoteStripeAttribute(level: nestDepth + 1,
+                                                   color: colors.quoteStripe,
+                                                   options: quoteStripeOptions)
+
+        str.updateExistingAttributes(for: .paragraphStyle) { (style: NSParagraphStyle) in
+            style.indented(by: stripeAttribute.layoutWidth)
+        }
+
+        str.addAttributeInMissingRanges(for: .quoteStripe, value: stripeAttribute)
+        str.addAttribute(for: .foregroundColor, value: colors.quote)
+    }
+
+    open func style(list str: NSMutableAttributedString, nestDepth: Int) {
+
+    }
+
+    open func style(listItemPrefix str: NSMutableAttributedString) {
+        str.setAttributes(listPrefixAttributes)
+    }
+
+    open func style(item str: NSMutableAttributedString, prefixLength: Int) {
+        let paragraphRanges = str.paragraphRanges()
+
+        guard let leadingParagraphRange = paragraphRanges.first else { return }
+
+        indentListItemLeadingParagraph(in: str, prefixLength: prefixLength, in: leadingParagraphRange)
+
+        paragraphRanges.dropFirst().forEach {
+            indentListItemTrailingParagraph(in: str, inRange: $0)
+        }
+    }
+
+    open func style(codeBlock str: NSMutableAttributedString, fenceInfo: String?) {
+        styleGenericCodeBlock(in: str)
+    }
+
+    open func style(htmlBlock str: NSMutableAttributedString) {
+        styleGenericCodeBlock(in: str)
+    }
+
+    open func style(customBlock str: NSMutableAttributedString) {
+
+    }
+
+    open func style(paragraph str: NSMutableAttributedString) {
+        str.addAttribute(for: .paragraphStyle, value: paragraphStyles.body)
+    }
+
+    open func style(heading str: NSMutableAttributedString, level: Int) {
+        let (font, color, paragraphStyle) = headingAttributes(for: level)
+
+        str.updateExistingAttributes(for: .font) { (currentFont: DownFont) in
+            var newFont = font
+
+            if currentFont.isMonospace {
+                newFont = newFont.monospace
+            }
+
+            if currentFont.isEmphasized {
+                newFont = newFont.emphasis
+            }
+
+            if currentFont.isStrong {
+                newFont = newFont.strong
+            }
+
+            return newFont
+        }
+
+        str.addAttributes([
+            .foregroundColor: color,
+            .paragraphStyle: paragraphStyle])
+    }
+
+    open func style(thematicBreak str: NSMutableAttributedString) {
+        let paragraphStyle = NSMutableParagraphStyle()
+        paragraphStyle.firstLineHeadIndent = thematicBreakOptions.indentation
+        let attr = ThematicBreakAttribute(thickness: thematicBreakOptions.thickness, color: colors.thematicBreak)
+        str.addAttribute(for: .thematicBreak, value: attr)
+        str.addAttribute(for: .paragraphStyle, value: paragraphStyle)
+    }
+
+    open func style(text str: NSMutableAttributedString) {
+        str.setAttributes([
+            .font: fonts.body,
+            .foregroundColor: colors.body])
+    }
+
+    open func style(softBreak str: NSMutableAttributedString) {
+
+    }
+
+    open func style(lineBreak str: NSMutableAttributedString) {
+
+    }
+
+    open func style(code str: NSMutableAttributedString) {
+        styleGenericInlineCode(in: str)
+    }
+
+    open func style(htmlInline str: NSMutableAttributedString) {
+        styleGenericInlineCode(in: str)
+    }
+
+    open func style(customInline str: NSMutableAttributedString) {
+
+    }
+
+    open func style(emphasis str: NSMutableAttributedString) {
+        str.updateExistingAttributes(for: .font) { (font: DownFont) in
+            font.emphasis
+        }
+    }
+
+    open func style(strong str: NSMutableAttributedString) {
+        str.updateExistingAttributes(for: .font) { (font: DownFont) in
+            font.strong
+        }
+    }
+
+    open func style(link str: NSMutableAttributedString, title: String?, url: String?) {
+        guard let url = url else { return }
+        styleGenericLink(in: str, url: url)
+    }
+
+    open func style(image str: NSMutableAttributedString, title: String?, url: String?) {
+        guard let url = url else { return }
+        styleGenericLink(in: str, url: url)
+    }
+
+    // MARK: - Common Styling
+
+    private func styleGenericCodeBlock(in str: NSMutableAttributedString) {
+        let blockBackgroundAttribute = BlockBackgroundColorAttribute(
+            color: colors.codeBlockBackground,
+            inset: codeBlockOptions.containerInset)
+
+        let adjustedParagraphStyle = paragraphStyles.code.inset(by: blockBackgroundAttribute.inset)
+
+        str.setAttributes([
+            .font: fonts.code,
+            .foregroundColor: colors.code,
+            .paragraphStyle: adjustedParagraphStyle,
+            .blockBackgroundColor: blockBackgroundAttribute])
+    }
+
+    private func styleGenericInlineCode(in str: NSMutableAttributedString) {
+        str.setAttributes([
+            .font: fonts.code,
+            .foregroundColor: colors.code])
+    }
+
+    private func styleGenericLink(in str: NSMutableAttributedString, url: String) {
+        str.addAttributes([
+            .link: url,
+            .foregroundColor: colors.link])
+    }
+
+    // MARK: - Helpers
+
+    private func headingAttributes(for level: Int) -> (DownFont, DownColor, NSParagraphStyle) {
+        switch level {
+        case 1: return (fonts.heading1, colors.heading1, paragraphStyles.heading1)
+        case 2: return (fonts.heading2, colors.heading2, paragraphStyles.heading2)
+        case 3: return (fonts.heading3, colors.heading3, paragraphStyles.heading3)
+        case 4: return (fonts.heading4, colors.heading4, paragraphStyles.heading4)
+        case 5: return (fonts.heading5, colors.heading5, paragraphStyles.heading5)
+        case 6: return (fonts.heading6, colors.heading6, paragraphStyles.heading6)
+        default: return (fonts.heading1, colors.heading1, paragraphStyles.heading1)
+        }
+    }
+
+    private func indentListItemLeadingParagraph(in str: NSMutableAttributedString,
+                                                prefixLength: Int,
+                                                in range: NSRange) {
+
+        str.updateExistingAttributes(for: .paragraphStyle, in: range) { (existingStyle: NSParagraphStyle) in
+            existingStyle.indented(by: itemParagraphStyler.indentation)
+        }
+
+        let attributedPrefix = str.prefix(with: prefixLength)
+        let prefixWidth = attributedPrefix.size().width
+
+        let defaultStyle = itemParagraphStyler.leadingParagraphStyle(prefixWidth: prefixWidth)
+        str.addAttributeInMissingRanges(for: .paragraphStyle, value: defaultStyle, within: range)
+    }
+
+    private func indentListItemTrailingParagraph(in str: NSMutableAttributedString, inRange range: NSRange) {
+        str.updateExistingAttributes(for: .paragraphStyle, in: range) { (existingStyle: NSParagraphStyle) in
+            existingStyle.indented(by: itemParagraphStyler.indentation)
+        }
+
+        let defaultStyle = itemParagraphStyler.trailingParagraphStyle
+        str.addAttributeInMissingRanges(for: .paragraphStyle, value: defaultStyle, within: range)
+
+        indentListItemQuotes(in: str, inRange: range)
+    }
+
+    private func indentListItemQuotes(in str: NSMutableAttributedString, inRange range: NSRange) {
+        str.updateExistingAttributes(for: .quoteStripe, in: range) { (stripe: QuoteStripeAttribute) in
+            stripe.indented(by: itemParagraphStyler.indentation)
+        }
+    }
+
+}
+
+// MARK: - Helper Extensions
+
+private extension NSParagraphStyle {
+
+    func indented(by indentation: CGFloat) -> NSParagraphStyle {
+        guard let result = mutableCopy() as? NSMutableParagraphStyle else { return self }
+        result.firstLineHeadIndent += indentation
+        result.headIndent += indentation
+
+        result.tabStops = tabStops.map {
+            NSTextTab(textAlignment: $0.alignment, location: $0.location + indentation, options: $0.options)
+        }
+
+        return result
+    }
+
+    func inset(by amount: CGFloat) -> NSParagraphStyle {
+        guard let result = mutableCopy() as? NSMutableParagraphStyle else { return self }
+        result.paragraphSpacingBefore += amount
+        result.paragraphSpacing += amount
+        result.firstLineHeadIndent += amount
+        result.headIndent += amount
+        result.tailIndent = -amount
+        return result
+    }
+
+}
+
+private extension NSAttributedString {
+
+    func prefix(with length: Int) -> NSAttributedString {
+        guard length <= self.length else { return self }
+        guard length > 0 else { return NSAttributedString() }
+        return attributedSubstring(from: NSRange(location: 0, length: length))
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Stylers/DownStylerConfiguration.swift

@@ -0,0 +1,47 @@
+//
+//  DownStylerConfiguration.swift
+//  Down
+//
+//  Created by John Nguyen on 10.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+/// A configuration object used to initialze the `DownStyler`.
+
+public struct DownStylerConfiguration {
+
+    // MARK: - Properties
+
+    public var fonts: FontCollection
+    public var colors: ColorCollection
+    public var paragraphStyles: ParagraphStyleCollection
+
+    public var listItemOptions: ListItemOptions
+    public var quoteStripeOptions: QuoteStripeOptions
+    public var thematicBreakOptions: ThematicBreakOptions
+    public var codeBlockOptions: CodeBlockOptions
+
+    // MARK: - Life cycle
+
+    public init(fonts: FontCollection = StaticFontCollection(),
+                colors: ColorCollection = StaticColorCollection(),
+                paragraphStyles: ParagraphStyleCollection = StaticParagraphStyleCollection(),
+                listItemOptions: ListItemOptions = ListItemOptions(),
+                quoteStripeOptions: QuoteStripeOptions = QuoteStripeOptions(),
+                thematicBreakOptions: ThematicBreakOptions = ThematicBreakOptions(),
+                codeBlockOptions: CodeBlockOptions = CodeBlockOptions()
+    ) {
+        self.fonts = fonts
+        self.colors = colors
+        self.paragraphStyles = paragraphStyles
+        self.listItemOptions = listItemOptions
+        self.quoteStripeOptions = quoteStripeOptions
+        self.thematicBreakOptions = thematicBreakOptions
+        self.codeBlockOptions = codeBlockOptions
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Stylers/Styler.swift

@@ -0,0 +1,189 @@
+//
+//  Styler.swift
+//  Down
+//
+//  Created by John Nguyen on 13.04.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+
+/// A styler is an object that manipulates the appearance of attributed strings generated
+/// for each particular markdown node. The attributed string passed into each method is
+/// mutable, so new attributes can be added and/or existing attributes modified or removed.
+///
+/// When applying paragraph styles to a string, take care not to cause any conflicts with
+/// existing paragraph styles, as this can lead to visual bugs that are difficult to
+/// understand.
+///
+/// A styler is used in conjunction with an instance of `AttributedStringVisitor` in order
+/// to generate an NSAttributedString from an abstract syntax tree.
+
+public protocol Styler {
+
+    /// Styles the content of the document in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the document content.
+
+    func style(document str: NSMutableAttributedString)
+
+    /// Styles the content of the block quote contained in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the quote content.
+    ///     - nestDepth: the zero indexed nesting depth of the block quote node.
+
+    func style(blockQuote str: NSMutableAttributedString, nestDepth: Int)
+
+    /// Styles the content of the list contained in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the list content.
+    ///     - nestDepth: the zero indexed nesting depth of the list node.
+
+    func style(list str: NSMutableAttributedString, nestDepth: Int)
+
+    /// Styles the number or bullet list item prefix.
+    ///
+    /// - Parameters:
+    ///     - str: the list item prefix.
+
+    func style(listItemPrefix str: NSMutableAttributedString)
+
+    /// Styles the content of the list item contained in the given string, including the
+    /// number or bullet prefix.
+    ///
+    /// - Parameters:
+    ///     - str: the item content.
+    ///     - prefixLength: the character length of the number or bullet prefix.
+
+    func style(item str: NSMutableAttributedString, prefixLength: Int)
+
+    /// Styles the content of the code block in the given string.
+    ///
+    /// An example use case for `fenceInfo` is to specify a programming language name,
+    /// which could be used to support syntax highlighting.
+    ///
+    /// - Parameters:
+    ///     - str: the code content.
+    ///     - fenceInfo: the string that trails the initial \`\`\` ticks.
+
+    func style(codeBlock str: NSMutableAttributedString, fenceInfo: String?)
+
+    /// Styles the content of the html block contained in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the html content.
+
+    func style(htmlBlock str: NSMutableAttributedString)
+
+    /// Styles the content of the custom block contained in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the content.
+
+    func style(customBlock str: NSMutableAttributedString)
+
+    /// Styles the content of the paragraph in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the paragraph content.
+
+    func style(paragraph str: NSMutableAttributedString)
+
+    /// Styles the content of the heading in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the heading content.
+    ///     - level: the heading level [1, 6]
+
+    func style(heading str: NSMutableAttributedString, level: Int)
+
+    /// Styles the content of the thematic break in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the thematic break.
+
+    func style(thematicBreak str: NSMutableAttributedString)
+
+    /// Styles the content of the inline text node in the given string.
+    ///
+    /// The text nodes are always the leaves of the AST, thus they
+    /// contain the base style upon which other nodes can work with.
+    ///
+    /// - Parameters:
+    ///     - str: the text content.
+
+    func style(text str: NSMutableAttributedString)
+
+    /// Styles the content of the soft break in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the soft break.
+
+    func style(softBreak str: NSMutableAttributedString)
+
+    /// Styles the content of the line break in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the line break.
+
+    func style(lineBreak str: NSMutableAttributedString)
+
+    /// Styles the content of the inline code in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the code content.
+
+    func style(code str: NSMutableAttributedString)
+
+    /// Styles the content of the inline html tags in the given string.
+    ///
+    /// Note, the content does not include text between matching tags.
+    ///
+    /// - Parameters:
+    ///     - str: the html content.
+
+    func style(htmlInline str: NSMutableAttributedString)
+
+    /// Styles the content of the inline custom node in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the custom content.
+
+    func style(customInline str: NSMutableAttributedString)
+
+    /// Styles the content of the inline emphasis node in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the ephasized content.
+
+    func style(emphasis str: NSMutableAttributedString)
+
+    /// Styles the content of the inline strong node in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the strong content.
+
+    func style(strong str: NSMutableAttributedString)
+
+    /// Styles the content of the inline link node in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the link content.
+    ///     - title: the link title.
+    ///     - url: the linked url.
+
+    func style(link str: NSMutableAttributedString, title: String?, url: String?)
+
+    /// Styles the content of the inline image node in the given string.
+    ///
+    /// - Parameters:
+    ///     - str: the link content.
+    ///     - title: the link title.
+    ///     - url: the linked url.
+
+    func style(image str: NSMutableAttributedString, title: String?, url: String?)
+
+}

Sources/Down/AST/Styling/Text Views/DownDebugTextView.swift

@@ -0,0 +1,39 @@
+//
+//  DownDebugTextView.swift
+//  Down
+//
+//  Created by John Nguyen on 06.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+
+#elseif canImport(AppKit)
+
+import AppKit
+
+#endif
+
+/// A text view capable of parsing and rendering markdown via the AST, as well as line fragments.
+///
+/// See `DownDebugLayoutManager`.
+
+public class DownDebugTextView: DownTextView {
+
+    // MARK: - Life cycle
+
+    public init(frame: CGRect, styler: Styler = DownStyler()) {
+        super.init(frame: frame, styler: styler, layoutManager: DownDebugLayoutManager())
+    }
+
+    required public init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+}
+
+#endif

Sources/Down/AST/Styling/Text Views/DownTextView.swift

@@ -0,0 +1,100 @@
+//
+//  DownTextView.swift
+//  Down
+//
+//  Created by John Nguyen on 03.08.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+#if !os(watchOS) && !os(Linux)
+
+#if canImport(UIKit)
+
+import UIKit
+public typealias TextView = UITextView
+
+#elseif canImport(AppKit)
+
+import AppKit
+public typealias TextView = NSTextView
+
+#endif
+
+/// A text view capable of parsing and rendering markdown via the AST.
+
+open class DownTextView: TextView {
+
+    // MARK: - Properties
+
+    open var styler: Styler {
+        didSet {
+            try? render()
+        }
+    }
+
+    #if canImport(UIKit)
+
+    open override var text: String! {
+        didSet {
+            guard oldValue != text else { return }
+            try? render()
+        }
+    }
+
+    #elseif canImport(AppKit)
+
+    open override var string: String {
+        didSet {
+            guard oldValue != string else { return }
+            try? render()
+        }
+    }
+
+    #endif
+
+    // MARK: - Life cycle
+
+    public convenience init(frame: CGRect, styler: Styler = DownStyler()) {
+        self.init(frame: frame, styler: styler, layoutManager: DownLayoutManager())
+    }
+
+    public init(frame: CGRect, styler: Styler, layoutManager: NSLayoutManager) {
+        self.styler = styler
+
+        let textStorage = NSTextStorage()
+        let textContainer = NSTextContainer()
+
+        textStorage.addLayoutManager(layoutManager)
+        layoutManager.addTextContainer(textContainer)
+
+        super.init(frame: frame, textContainer: textContainer)
+
+        // We don't want the text view to overwrite link attributes set
+        // by the styler.
+        linkTextAttributes = [:]
+    }
+
+    required public init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    // MARK: - Methods
+
+    open func render() throws {
+        #if canImport(UIKit)
+        let down = Down(markdownString: text)
+        let markdown = try down.toAttributedString(styler: styler)
+        attributedText = markdown
+
+        #elseif canImport(AppKit)
+        guard let textStorage = textStorage else { return }
+        let down = Down(markdownString: string)
+        let markdown = try down.toAttributedString(styler: styler)
+        textStorage.replaceCharacters(in: textStorage.wholeRange, with: markdown)
+
+        #endif
+    }
+
+}
+
+#endif

Sources/Down/AST/Visitors/AttributedStringVisitor.swift

@@ -0,0 +1,249 @@
+//
+//  AttributedStringVisitor.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+#if !os(Linux)
+
+import Foundation
+
+/// This class is used to generated an `NSMutableAttributedString` from the abstract syntax
+/// tree produced by a markdown string. It traverses the tree to construct substrings
+/// represented at each node and uses an instance of `Styler` to apply the visual attributes.
+/// These substrings are joined together to produce the final result.
+
+public typealias ListPrefixGeneratorBuilder = (List) -> ListItemPrefixGenerator
+
+public class AttributedStringVisitor {
+
+    // MARK: - Properties
+
+    private let styler: Styler
+    private let options: DownOptions
+    private let listPrefixGeneratorBuilder: ListPrefixGeneratorBuilder
+    private var listPrefixGenerators = [ListItemPrefixGenerator]()
+
+    /// Creates a new instance with the given styler and options.
+    ///
+    /// - parameters:
+    ///     - styler: used to style the markdown elements.
+    ///     - options: may be used to modify rendering.
+    ///     - listPrefixGeneratorBuilder: may be used to modify list prefixes.
+
+    public init(
+        styler: Styler,
+        options: DownOptions = .default,
+        listPrefixGeneratorBuilder: @escaping ListPrefixGeneratorBuilder = { StaticListItemPrefixGenerator(list: $0) }
+    ) {
+        self.styler = styler
+        self.options = options
+        self.listPrefixGeneratorBuilder = listPrefixGeneratorBuilder
+    }
+
+}
+
+extension AttributedStringVisitor: Visitor {
+
+    public typealias Result = NSMutableAttributedString
+
+    public func visit(document node: Document) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        styler.style(document: result)
+        return result
+    }
+
+    public func visit(blockQuote node: BlockQuote) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(blockQuote: result, nestDepth: node.nestDepth)
+        return result
+    }
+
+    public func visit(list node: List) -> NSMutableAttributedString {
+
+        listPrefixGenerators.append(listPrefixGeneratorBuilder(node))
+        defer { listPrefixGenerators.removeLast() }
+
+        let items = visitChildren(of: node)
+
+        let result = items.joined
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(list: result, nestDepth: node.nestDepth)
+        return result
+    }
+
+    public func visit(item node: Item) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+
+        let prefix = listPrefixGenerators.last?.next() ?? "•"
+        let attributedPrefix = "\(prefix)\t".attributed
+        styler.style(listItemPrefix: attributedPrefix)
+        result.insert(attributedPrefix, at: 0)
+
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(item: result, prefixLength: (prefix as NSString).length)
+        return result
+    }
+
+    public func visit(codeBlock node: CodeBlock) -> NSMutableAttributedString {
+        guard let literal = node.literal else { return .empty }
+        let result = literal.replacingNewlinesWithLineSeparators().attributed
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(codeBlock: result, fenceInfo: node.fenceInfo)
+        return result
+    }
+
+    public func visit(htmlBlock node: HtmlBlock) -> NSMutableAttributedString {
+        guard let literal = node.literal else { return .empty }
+        let result = literal.replacingNewlinesWithLineSeparators().attributed
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(htmlBlock: result)
+        return result
+    }
+
+    public func visit(customBlock node: CustomBlock) -> NSMutableAttributedString {
+        guard let result = node.literal?.attributed else { return .empty }
+        styler.style(customBlock: result)
+        return result
+    }
+
+    public func visit(paragraph node: Paragraph) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(paragraph: result)
+        return result
+    }
+
+    public func visit(heading node: Heading) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        if node.hasSuccessor { result.append(.paragraphSeparator) }
+        styler.style(heading: result, level: node.headingLevel)
+        return result
+    }
+
+    public func visit(thematicBreak node: ThematicBreak) -> NSMutableAttributedString {
+        let result = "\(String.zeroWidthSpace)\n".attributed
+        styler.style(thematicBreak: result)
+        return result
+    }
+
+    public func visit(text node: Text) -> NSMutableAttributedString {
+        guard let result = node.literal?.attributed else { return .empty }
+        styler.style(text: result)
+        return result
+    }
+
+    public func visit(softBreak node: SoftBreak) -> NSMutableAttributedString {
+        let result = (options.contains(.hardBreaks) ? String.lineSeparator : " ").attributed
+        styler.style(softBreak: result)
+        return result
+    }
+
+    public func visit(lineBreak node: LineBreak) -> NSMutableAttributedString {
+        let result = String.lineSeparator.attributed
+        styler.style(lineBreak: result)
+        return result
+    }
+
+    public func visit(code node: Code) -> NSMutableAttributedString {
+        guard let result = node.literal?.attributed else { return .empty }
+        styler.style(code: result)
+        return result
+    }
+
+    public func visit(htmlInline node: HtmlInline) -> NSMutableAttributedString {
+        guard let result = node.literal?.attributed else { return .empty }
+        styler.style(htmlInline: result)
+        return result
+    }
+
+    public func visit(customInline node: CustomInline) -> NSMutableAttributedString {
+        guard let result = node.literal?.attributed else { return .empty }
+        styler.style(customInline: result)
+        return result
+    }
+
+    public func visit(emphasis node: Emphasis) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        styler.style(emphasis: result)
+        return result
+    }
+
+    public func visit(strong node: Strong) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        styler.style(strong: result)
+        return result
+    }
+
+    public func visit(link node: Link) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        styler.style(link: result, title: node.title, url: node.url)
+        return result
+    }
+
+    public func visit(image node: Image) -> NSMutableAttributedString {
+        let result = visitChildren(of: node).joined
+        styler.style(image: result, title: node.title, url: node.url)
+        return result
+    }
+}
+
+// MARK: - Helper extensions
+
+private extension Sequence where Iterator.Element == NSMutableAttributedString {
+
+    var joined: NSMutableAttributedString {
+        return reduce(into: NSMutableAttributedString()) { $0.append($1) }
+    }
+
+}
+
+private extension NSMutableAttributedString {
+
+    static var empty: NSMutableAttributedString {
+        return "".attributed
+    }
+
+}
+
+private extension NSAttributedString {
+
+    static var paragraphSeparator: NSAttributedString {
+        return String.paragraphSeparator.attributed
+    }
+
+}
+
+private extension String {
+
+    var attributed: NSMutableAttributedString {
+        return NSMutableAttributedString(string: self)
+    }
+
+    // This codepoint marks the end of a paragraph and the start of the next.
+
+    static var paragraphSeparator: String {
+        return "\u{2029}"
+    }
+
+    // This code point allows line breaking, without starting a new paragraph.
+
+    static var lineSeparator: String {
+        return "\u{2028}"
+    }
+
+    static var zeroWidthSpace: String {
+        return "\u{200B}"
+    }
+
+    func replacingNewlinesWithLineSeparators() -> String {
+        let trimmed = trimmingCharacters(in: .newlines)
+        let lines = trimmed.components(separatedBy: .newlines)
+        return lines.joined(separator: .lineSeparator)
+    }
+
+}
+
+#endif // !os(Linux)

Sources/Down/AST/Visitors/DebugVisitor.swift

@@ -0,0 +1,125 @@
+//
+//  DebugVisitor.swift
+//  Down
+//
+//  Created by John Nguyen on 09.04.19.
+//
+
+import Foundation
+
+/// This visitor will generate the debug description of an entire abstract syntax tree,
+/// indicating relationships between nodes with indentation.
+
+public class DebugVisitor: Visitor {
+
+    // MARK: - Properties
+
+    private var depth = 0
+
+    private var indent: String {
+        return String(repeating: "    ", count: depth)
+    }
+
+    // MARK: - Life cycle
+
+    public init() {}
+
+    // MARK: - Helpers
+
+    private func report(_ node: Node) -> String {
+        return "\(indent)\(node is Document ? "" : "↳ ")\(String(reflecting: node))\n"
+    }
+
+    private func reportWithChildren(_ node: Node) -> String {
+        let thisNode = report(node)
+        depth += 1
+        let children = visitChildren(of: node).joined()
+        depth -= 1
+        return "\(thisNode)\(children)"
+    }
+
+    // MARK: - Visitor
+
+    public typealias Result = String
+
+    public func visit(document node: Document) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(blockQuote node: BlockQuote) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(list node: List) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(item node: Item) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(codeBlock node: CodeBlock) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(htmlBlock node: HtmlBlock) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(customBlock node: CustomBlock) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(paragraph node: Paragraph) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(heading node: Heading) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(thematicBreak node: ThematicBreak) -> String {
+        return report(node)
+    }
+
+    public func visit(text node: Text) -> String {
+        return report(node)
+    }
+
+    public func visit(softBreak node: SoftBreak) -> String {
+        return report(node)
+    }
+
+    public func visit(lineBreak node: LineBreak) -> String {
+        return report(node)
+    }
+
+    public func visit(code node: Code) -> String {
+        return report(node)
+    }
+
+    public func visit(htmlInline node: HtmlInline) -> String {
+        return report(node)
+    }
+
+    public func visit(customInline node: CustomInline) -> String {
+        return report(node)
+    }
+
+    public func visit(emphasis node: Emphasis) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(strong node: Strong) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(link node: Link) -> String {
+        return reportWithChildren(node)
+    }
+
+    public func visit(image node: Image) -> String {
+        return reportWithChildren(node)
+    }
+
+}

Sources/Down/AST/Visitors/ListItemPrefixGenerator.swift

@@ -0,0 +1,54 @@
+//
+//  ListItemPrefixGenerator.swift
+//  Down
+//
+//  Created by John Nguyen on 23.06.19.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+
+/// A ListItemPrefixGenerator is an object used to generate list item prefix.
+public protocol ListItemPrefixGenerator {
+    init(listType: List.ListType, numberOfItems: Int, nestDepth: Int)
+    func next() -> String?
+}
+
+public extension ListItemPrefixGenerator {
+    init(list: List) {
+        self.init(listType: list.listType, numberOfItems: list.numberOfItems, nestDepth: list.nestDepth)
+    }
+}
+
+/// Default implementation of `ListItemPrefixGenerator`.
+/// Generating the following symbol based on `List.ListType`:
+/// - List.ListType is bullet => "•"
+/// - List.ListType is ordered => "X." (where is the item number)
+public class StaticListItemPrefixGenerator: ListItemPrefixGenerator {
+
+    // MARK: - Properties
+
+    private var prefixes: IndexingIterator<[String]>
+
+    // MARK: - Life cycle
+
+    required public init(listType: List.ListType, numberOfItems: Int, nestDepth: Int) {
+            switch listType {
+            case .bullet:
+                prefixes = [String](repeating: "•", count: numberOfItems)
+                    .makeIterator()
+
+            case .ordered(let start):
+                prefixes = (start..<(start + numberOfItems))
+                    .map { "\($0)." }
+                    .makeIterator()
+            }
+        }
+
+    // MARK: - Methods
+
+    public func next() -> String? {
+        prefixes.next()
+    }
+
+}

Sources/Down/AST/Visitors/Visitor.swift

@@ -0,0 +1,75 @@
+//
+//  Vistor.swift
+//  Down
+//
+//  Created by John Nguyen on 07.04.19.
+//
+
+import Foundation
+
+/// Visitor describes a type that is able to traverse the abstract syntax tree. It visits
+/// each node of the tree and produces some result for that node. A visitor is "accepted" by
+/// the root node (of type `Document`), which will start the traversal by first invoking
+/// `visit(document:)`.
+
+public protocol Visitor {
+
+    associatedtype Result
+
+    func visit(document node: Document) -> Result
+    func visit(blockQuote node: BlockQuote) -> Result
+    func visit(list node: List) -> Result
+    func visit(item node: Item) -> Result
+    func visit(codeBlock node: CodeBlock) -> Result
+    func visit(htmlBlock node: HtmlBlock) -> Result
+    func visit(customBlock node: CustomBlock) -> Result
+    func visit(paragraph node: Paragraph) -> Result
+    func visit(heading node: Heading) -> Result
+    func visit(thematicBreak node: ThematicBreak) -> Result
+    func visit(text node: Text) -> Result
+    func visit(softBreak node: SoftBreak) -> Result
+    func visit(lineBreak node: LineBreak) -> Result
+    func visit(code node: Code) -> Result
+    func visit(htmlInline node: HtmlInline) -> Result
+    func visit(customInline node: CustomInline) -> Result
+    func visit(emphasis node: Emphasis) -> Result
+    func visit(strong node: Strong) -> Result
+    func visit(link node: Link) -> Result
+    func visit(image node: Image) -> Result
+    func visitChildren(of node: Node) -> [Result]
+
+}
+
+extension Visitor {
+
+    public func visitChildren(of node: Node) -> [Result] {
+        return node.childSequence.compactMap { child in
+            switch child {
+            case let child as Document:       return visit(document: child)
+            case let child as BlockQuote:     return visit(blockQuote: child)
+            case let child as List:           return visit(list: child)
+            case let child as Item:           return visit(item: child)
+            case let child as CodeBlock:      return visit(codeBlock: child)
+            case let child as HtmlBlock:      return visit(htmlBlock: child)
+            case let child as CustomBlock:    return visit(customBlock: child)
+            case let child as Paragraph:      return visit(paragraph: child)
+            case let child as Heading:        return visit(heading: child)
+            case let child as ThematicBreak:  return visit(thematicBreak: child)
+            case let child as Text:           return visit(text: child)
+            case let child as SoftBreak:      return visit(softBreak: child)
+            case let child as LineBreak:      return visit(lineBreak: child)
+            case let child as Code:           return visit(code: child)
+            case let child as HtmlInline:     return visit(htmlInline: child)
+            case let child as CustomInline:   return visit(customInline: child)
+            case let child as Emphasis:       return visit(emphasis: child)
+            case let child as Strong:         return visit(strong: child)
+            case let child as Link:           return visit(link: child)
+            case let child as Image:          return visit(image: child)
+            default:
+                assertionFailure("Unexpected child")
+                return nil
+            }
+        }
+    }
+
+}

Sources/Down/Down.h

@@ -3,7 +3,7 @@
 //  Down
 //
 //  Created by Rob Phillips on 6/1/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
 @import Foundation;

Sources/Down/Down.swift

@@ -0,0 +1,27 @@
+//
+//  Down.swift
+//  Down
+//
+//  Created by Rob Phillips on 5/28/16.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+
+public struct Down: DownASTRenderable, DownHTMLRenderable, DownXMLRenderable,
+                    DownLaTeXRenderable, DownGroffRenderable, DownCommonMarkRenderable {
+    /// A string containing CommonMark Markdown
+    public var markdownString: String
+
+    /// Initializes the container with a CommonMark Markdown string which can then be
+    /// rendered depending on protocol conformance.
+    ///
+    /// - Parameter markdownString: A string containing CommonMark Markdown
+    public init(markdownString: String) {
+        self.markdownString = markdownString
+    }
+}
+
+#if !os(Linux)
+extension Down: DownAttributedStringRenderable { }
+#endif // !os(Linux)

Sources/Down/Enums & Options/DownErrors.swift

@@ -0,0 +1,36 @@
+//
+//  DownErrors.swift
+//  Down
+//
+//  Created by Rob Phillips on 5/28/16.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+
+public enum DownErrors: Error {
+
+    /// Thrown when there was an issue converting the Markdown into an abstract syntax tree.
+
+    case markdownToASTError
+
+    /// Thrown when the abstract syntax tree could not be rendered into another format.
+
+    case astRenderingError
+
+    /// Thrown when an HTML string cannot be converted into an `NSData` representation.
+
+    case htmlDataConversionError
+
+    #if os(macOS)
+
+    /// Thrown when a custom template bundle has a non-standard bundle format.
+    ///
+    /// Specifically, the file URL of the bundle’s subdirectory containing resource files could
+    /// not be found (i.e. the bundle's `resourceURL` property is nil).
+
+    case nonStandardBundleFormatError
+
+    #endif
+
+}

Sources/Down/Enums & Options/DownOptions.swift

@@ -0,0 +1,78 @@
+//
+//  DownOptions.swift
+//  Down
+//
+//  Created by Rob Phillips on 5/28/16.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+import libcmark
+
+public struct DownOptions: OptionSet {
+
+    // MARK: - Properties
+
+    public let rawValue: Int32
+
+    // MARK: - Life cycle
+
+    public init(rawValue: Int32) { self.rawValue = rawValue }
+
+    /// Default options.
+
+    public static let `default` = DownOptions(rawValue: CMARK_OPT_DEFAULT)
+
+    // MARK: - Rendering Options
+
+    /// Include a `data-sourcepos` attribute on all block elements.
+
+    public static let sourcePos = DownOptions(rawValue: CMARK_OPT_SOURCEPOS)
+
+    /// Render `softbreak` elements as hard line breaks.
+
+    public static let hardBreaks = DownOptions(rawValue: CMARK_OPT_HARDBREAKS)
+
+    /// Suppress raw HTML and unsafe links (`javascript:`, `vbscript:`,
+    /// `file:`, and `data:`, except for `image/png`, `image/gif`,
+    /// `image/jpeg`, or `image/webp` mime types).  Raw HTML is replaced
+    /// by a placeholder HTML comment. Unsafe links are replaced by
+    /// empty strings.
+    ///
+    /// Note: this is the default option as of cmark v0.29.0. Use `unsafe`
+    ///       to disable this behavior.
+
+    public static let safe = DownOptions(rawValue: CMARK_OPT_SAFE)
+
+    /// Render raw HTML and unsafe links (`javascript:`, `vbscript:`,
+    /// `file:`, and `data:`, except for `image/png`, `image/gif`,
+    /// `image/jpeg`, or `image/webp` mime types).  By default,
+    /// raw HTML is replaced by a placeholder HTML comment. Unsafe
+    /// links are replaced by empty strings.
+    ///
+    /// Note: `safe` is the default as of cmark v0.29.0
+
+    public static let unsafe = DownOptions(rawValue: CMARK_OPT_UNSAFE)
+
+    // MARK: - Parsing Options
+
+    /// Normalize tree by consolidating adjacent text nodes.
+
+    public static let normalize = DownOptions(rawValue: CMARK_OPT_NORMALIZE)
+
+    /// Validate UTF-8 in the input before parsing, replacing illegal
+    /// sequences with the replacement character U+FFFD.
+
+    public static let validateUTF8 = DownOptions(rawValue: CMARK_OPT_VALIDATE_UTF8)
+
+    /// Convert straight quotes to curly, --- to em dashes, -- to en dashes.
+
+    public static let smart = DownOptions(rawValue: CMARK_OPT_SMART)
+
+    // MARK: - Combo Options
+
+    /// Combines 'unsafe' and 'smart' to render raw HTML and produce smart typography.
+
+    public static let smartUnsafe = DownOptions(rawValue: CMARK_OPT_SMART + CMARK_OPT_UNSAFE)
+
+}

Sources/Down/Extensions/NSAttributedString+HTML.swift

@@ -3,27 +3,31 @@
 //  Down
 //
 //  Created by Rob Phillips on 6/1/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
-#if os(macOS)
-    import AppKit
-#else
-    import UIKit
-#endif
+#if !os(Linux)
 
+#if os(macOS)
+
+import AppKit
+
+#else
+
+import UIKit
+
+#endif
 
 extension NSAttributedString {
 
-    /**
-     Instantiates an attributed string with the given HTML string
+    /// Instantiates an attributed string with the given HTML string
+    ///
+    /// - Parameters:
+    ///     - htmlString: An HTML string.
+    ///
+    /// - Throws:
+    ///     `HTMLDataConversionError` or an instantiation error.
 
-     - parameter htmlString: An HTML string
-
-     - throws: `HTMLDataConversionError` or an instantiation error
-
-     - returns: An attributed string
-     */
     convenience init(htmlString: String) throws {
         guard let data = htmlString.data(using: String.Encoding.utf8) else {
             throw DownErrors.htmlDataConversionError
@@ -33,7 +37,10 @@ extension NSAttributedString {
             .documentType: NSAttributedString.DocumentType.html,
             .characterEncoding: NSNumber(value: String.Encoding.utf8.rawValue)
         ]
+
         try self.init(data: data, options: options, documentAttributes: nil)
     }
 
 }
+
+#endif // !os(Linux)

Sources/Down/Extensions/String+ToHTML.swift

@@ -3,7 +3,7 @@
 //  Down
 //
 //  Created by Rob Phillips on 6/1/16.
-//  Copyright © 2016 Glazed Donut, LLC. All rights reserved.
+//  Copyright © 2016-2019 Down. All rights reserved.
 //
 
 import Foundation
@@ -11,15 +11,16 @@ import libcmark
 
 extension String {
 
-    /**
-     Generates an HTML string from the contents of the string (self), which should contain CommonMark Markdown
+    /// Generates an HTML string from the contents of the string (self), which should contain CommonMark Markdown.
+    ///
+    /// - Parameters:
+    ///     - options: `DownOptions` to modify parsing or rendering, defaulting to `.default`.
+    /// - Returns:
+    ///     An HTML string.
+    ///
+    /// - Throws:
+    ///     `DownErrors` depending on the scenario.
 
-     - parameter options: `DownOptions` to modify parsing or rendering, defaulting to `.default`
-
-     - throws: `DownErrors` depending on the scenario
-
-     - returns: HTML string
-     */
     public func toHTML(_ options: DownOptions = .default) throws -> String {
         let ast = try DownASTRenderer.stringToAST(self, options: options)
         let html = try DownHTMLRenderer.astToHTML(ast, options: options)

Sources/Down/Renderers/DownASTRenderable.swift

@@ -0,0 +1,88 @@
+//
+//  DownASTRenderable.swift
+//  Down
+//
+//  Created by Rob Phillips on 5/31/16.
+//  Copyright © 2016-2019 Down. All rights reserved.
+//
+
+import Foundation
+import libcmark
+
+public protocol DownASTRenderable: DownRenderable {
+
+    func toAST(_ options: DownOptions) throws -> CMarkNode
+
+}
+
+extension DownASTRenderable {
+
+    /// Generates an abstract syntax tree from the `markdownString` property.
+    ///
+    /// - Parametera:
+    ///     - options: `DownOptions` to modify parsing or rendering, defaulting to `.default`.
+    ///
+    /// - Returns:
+    ///     An abstract syntax tree representation of the Markdown input.
+    ///
+    /// - Throws:
+    /// `MarkdownToASTError` if conversion fails.
+
+    public func toAST(_ options: DownOptions = .default) throws -> CMarkNode {
+        return try DownASTRenderer.stringToAST(markdownString, options: options)
+    }
+
+    /// Parses the `markdownString` property into an abstract syntax tree and returns the root `Document` node.
+    ///
+    /// - Parameters:
+    ///     - options: `DownOptions` to modify parsing or rendering, defaulting to `.default`.
+    ///
+    /// - Returns:
+    ///     The root Document node for the abstract syntax tree representation of the Markdown input.
+    ///
+    /// - Throws:
+    ///     `MarkdownToASTError` if conversion fails.
+
+    public func toDocument(_ options: DownOptions = .default) throws -> Document {
+        let tree = try toAST(options)
+
+        guard tree.type == CMARK_NODE_DOCUMENT else {
+            throw DownErrors.astRenderingError
+        }
+
+        return Document(cmarkNode: tree)
+    }
+
+}
+
+public struct DownASTRenderer {
+
+    /// Generates an abstract syntax tree from the given CommonMark Markdown string.
+    ///
+    /// **Important:** It is the caller's responsibility to call `cmark_node_free(ast)` on the returned value.
+    ///
+    /// - Parameters:
+    ///     - string: A string containing CommonMark Markdown.
+    ///     - options: `DownOptions` to modify parsing or rendering, defaulting to `.default`.
+    ///
+    /// - Returns:
+    ///     An abstract syntax tree representation of the Markdown input.
+    ///
+    /// - Throws:
+    ///     `MarkdownToASTError` if conversion fails.
+    public static func stringToAST(_ string: String, options: DownOptions = .default) throws -> CMarkNode {
+        var tree: CMarkNode?
+
+        string.withCString {
+            let stringLength = Int(strlen($0))
+            tree = cmark_parse_document($0, stringLength, options.rawValue)
+        }
+
+        guard let ast = tree else {
+            throw DownErrors.markdownToASTError
+        }
+
+        return ast
+    }
+
+}