Merge pull request #5 from MikhailZimin/fix-isNilOrEmpty-availability

fixed isNilOrEmpty availability.
2020-02-24 00:54:44 +03:00 · 2020-02-19 11:58:40 +07:00 · 2020-01-11 16:23:08 +03:00 · 2019-12-04 17:10:13 +03:00 · 2019-04-15 12:12:35 +03:00 · 2019-04-15 11:28:19 +03:00
44 changed files with 2606 additions and 925 deletions
@@ -1,5 +1,5 @@
 PODS:
-  - utopia (0.1.0)
+  - utopia (0.2.1)

 DEPENDENCIES:
  - utopia (from `../`)
@@ -9,8 +9,8 @@ EXTERNAL SOURCES:
    :path: "../"

 SPEC CHECKSUMS:
-  utopia: 62f8a2a9add7c9b605c03e8c20972831a569a084
+  utopia: 5f8b06c09df6ecc26f8f64a01bce85b887cfb4ab

 PODFILE CHECKSUM: 632947ed90777377758aa9384f691613d327ceb4

-COCOAPODS: 1.5.3
+COCOAPODS: 1.8.4
@@ -1,8 +1,7 @@
 {
  "name": "utopia",
-  "version": "0.1.0",
-  "summary": "A short description of utopia.",
-  "description": "TODO: Add long description of the pod here.",
+  "version": "0.2.1",
+  "summary": "Common utilities for Swift projects",
  "homepage": "https://github.com/Ramotion/utopia",
  "license": {
    "type": "MIT",
@@ -10,10 +9,11 @@
  },
  "authors": {
    "Dmitriy Kalachev": "dima.k@ramotion.com"
+    "Ramotion": "igor.k@ramotion.com"
  },
  "source": {
    "git": "https://github.com/Ramotion/utopia.git",
-    "tag": "0.1.0"
+    "tag": "0.2.1"
  },
  "platforms": {
    "ios": "10.0"
@@ -1,5 +1,5 @@
 PODS:
-  - utopia (0.1.0)
+  - utopia (0.2.1)

 DEPENDENCIES:
  - utopia (from `../`)
@@ -9,8 +9,8 @@ EXTERNAL SOURCES:
    :path: "../"

 SPEC CHECKSUMS:
-  utopia: 62f8a2a9add7c9b605c03e8c20972831a569a084
+  utopia: 5f8b06c09df6ecc26f8f64a01bce85b887cfb4ab

 PODFILE CHECKSUM: 632947ed90777377758aa9384f691613d327ceb4

-COCOAPODS: 1.5.3
+COCOAPODS: 1.8.4
@@ -0,0 +1,26 @@
+<?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>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
@@ -3,10 +3,15 @@ set -e
 set -u
 set -o pipefail

+function on_error {
+  echo "$(realpath -mq "${0}"):$1: error: Unexpected failure"
+}
+trap 'on_error $LINENO' ERR
+
 if [ -z ${FRAMEWORKS_FOLDER_PATH+x} ]; then
-    # If FRAMEWORKS_FOLDER_PATH is not set, then there's nowhere for us to copy
-    # frameworks to, so exit 0 (signalling the script phase was successful).
-    exit 0
+  # If FRAMEWORKS_FOLDER_PATH is not set, then there's nowhere for us to copy
+  # frameworks to, so exit 0 (signalling the script phase was successful).
+  exit 0
 fi

 echo "mkdir -p ${CONFIGURATION_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}"
@@ -36,8 +41,8 @@ install_framework()
  local destination="${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}"

  if [ -L "${source}" ]; then
-      echo "Symlinked..."
-      source="$(readlink "${source}")"
+    echo "Symlinked..."
+    source="$(readlink "${source}")"
  fi

  # Use filter instead of exclude so missing patterns don't throw errors.
@@ -47,8 +52,13 @@ install_framework()
  local basename
  basename="$(basename -s .framework "$1")"
  binary="${destination}/${basename}.framework/${basename}"
+
  if ! [ -r "$binary" ]; then
    binary="${destination}/${basename}"
+  elif [ -L "${binary}" ]; then
+    echo "Destination binary is symlinked..."
+    dirname="$(dirname "${binary}")"
+    binary="${dirname}/$(readlink "${binary}")"
  fi

  # Strip invalid architectures so "fat" simulator / device frameworks work on device
@@ -62,7 +72,7 @@ install_framework()
  # Embed linked Swift runtime libraries. No longer necessary as of Xcode 7.
  if [ "${XCODE_VERSION_MAJOR}" -lt 7 ]; then
    local swift_runtime_libs
-    swift_runtime_libs=$(xcrun otool -LX "$binary" | grep --color=never @rpath/libswift | sed -E s/@rpath\\/\(.+dylib\).*/\\1/g | uniq -u  && exit ${PIPESTATUS[0]})
+    swift_runtime_libs=$(xcrun otool -LX "$binary" | grep --color=never @rpath/libswift | sed -E s/@rpath\\/\(.+dylib\).*/\\1/g | uniq -u)
    for lib in $swift_runtime_libs; do
      echo "rsync -auv \"${SWIFT_STDLIB_PATH}/${lib}\" \"${destination}\""
      rsync -auv "${SWIFT_STDLIB_PATH}/${lib}" "${destination}"
@@ -84,7 +94,7 @@ install_dsym() {
    binary="${DERIVED_FILES_DIR}/${basename}.framework.dSYM/Contents/Resources/DWARF/${basename}"

    # Strip invalid architectures so "fat" simulator / device frameworks work on device
-    if [[ "$(file "$binary")" == *"Mach-O dSYM companion"* ]]; then
+    if [[ "$(file "$binary")" == *"Mach-O "*"dSYM companion"* ]]; then
      strip_invalid_archs "$binary"
    fi

@@ -99,10 +109,18 @@ install_dsym() {
  fi
 }

+# Copies the bcsymbolmap files of a vendored framework
+install_bcsymbolmap() {
+    local bcsymbolmap_path="$1"
+    local destination="${BUILT_PRODUCTS_DIR}"
+    echo "rsync --delete -av "${RSYNC_PROTECT_TMP_FILES[@]}" --filter "- CVS/" --filter "- .svn/" --filter "- .git/" --filter "- .hg/" --filter "- Headers" --filter "- PrivateHeaders" --filter "- Modules" "${bcsymbolmap_path}" "${destination}""
+    rsync --delete -av "${RSYNC_PROTECT_TMP_FILES[@]}" --filter "- CVS/" --filter "- .svn/" --filter "- .git/" --filter "- .hg/" --filter "- Headers" --filter "- PrivateHeaders" --filter "- Modules" "${bcsymbolmap_path}" "${destination}"
+}
+
 # Signs a framework with the provided identity
 code_sign_if_enabled() {
-  if [ -n "${EXPANDED_CODE_SIGN_IDENTITY}" -a "${CODE_SIGNING_REQUIRED:-}" != "NO" -a "${CODE_SIGNING_ALLOWED}" != "NO" ]; then
-    # Use the current code_sign_identitiy
+  if [ -n "${EXPANDED_CODE_SIGN_IDENTITY:-}" -a "${CODE_SIGNING_REQUIRED:-}" != "NO" -a "${CODE_SIGNING_ALLOWED}" != "NO" ]; then
+    # Use the current code_sign_identity
    echo "Code Signing $1 with Identity ${EXPANDED_CODE_SIGN_IDENTITY_NAME}"
    local code_sign_cmd="/usr/bin/codesign --force --sign ${EXPANDED_CODE_SIGN_IDENTITY} ${OTHER_CODE_SIGN_FLAGS:-} --preserve-metadata=identifier,entitlements '$1'"

@@ -131,7 +149,7 @@ strip_invalid_archs() {
  for arch in $binary_archs; do
    if ! [[ "${ARCHS}" == *"$arch"* ]]; then
      # Strip non-valid architectures in-place
-      lipo -remove "$arch" -output "$binary" "$binary" || exit 1
+      lipo -remove "$arch" -output "$binary" "$binary"
      stripped="$stripped $arch"
    fi
  done
@@ -1,11 +1,12 @@
 ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES
 FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/utopia"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/utopia/utopia.framework/Headers"
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "${PODS_CONFIGURATION_BUILD_DIR}/utopia/utopia.framework/Headers"
 OTHER_LDFLAGS = $(inherited) -framework "utopia"
-OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
+OTHER_SWIFT_FLAGS = $(inherited) -D COCOAPODS
 PODS_BUILD_DIR = ${BUILD_DIR}
 PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
 PODS_PODFILE_DIR_PATH = ${SRCROOT}/.
 PODS_ROOT = ${SRCROOT}/Pods
+USE_RECURSIVE_SCRIPT_INPUTS_IN_SCRIPT_PHASES = YES
@@ -1,11 +1,12 @@
 ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES
 FRAMEWORK_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/utopia"
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
+HEADER_SEARCH_PATHS = $(inherited) "${PODS_CONFIGURATION_BUILD_DIR}/utopia/utopia.framework/Headers"
 LD_RUNPATH_SEARCH_PATHS = $(inherited) '@executable_path/Frameworks' '@loader_path/Frameworks'
-OTHER_CFLAGS = $(inherited) -iquote "${PODS_CONFIGURATION_BUILD_DIR}/utopia/utopia.framework/Headers"
 OTHER_LDFLAGS = $(inherited) -framework "utopia"
-OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
+OTHER_SWIFT_FLAGS = $(inherited) -D COCOAPODS
 PODS_BUILD_DIR = ${BUILD_DIR}
 PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
 PODS_PODFILE_DIR_PATH = ${SRCROOT}/.
 PODS_ROOT = ${SRCROOT}/Pods
+USE_RECURSIVE_SCRIPT_INPUTS_IN_SCRIPT_PHASES = YES
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>en</string>
+  <key>CFBundleExecutable</key>
+  <string>${EXECUTABLE_NAME}</string>
+  <key>CFBundleIdentifier</key>
+  <string>${PRODUCT_BUNDLE_IDENTIFIER}</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>${PRODUCT_NAME}</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>0.2.1</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>${CURRENT_PROJECT_VERSION}</string>
+  <key>NSPrincipalClass</key>
+  <string></string>
+</dict>
+</plist>
@@ -1,9 +1,10 @@
 CONFIGURATION_BUILD_DIR = ${PODS_CONFIGURATION_BUILD_DIR}/utopia
 GCC_PREPROCESSOR_DEFINITIONS = $(inherited) COCOAPODS=1
-OTHER_SWIFT_FLAGS = $(inherited) "-D" "COCOAPODS"
+OTHER_SWIFT_FLAGS = $(inherited) -D COCOAPODS
 PODS_BUILD_DIR = ${BUILD_DIR}
 PODS_CONFIGURATION_BUILD_DIR = ${PODS_BUILD_DIR}/$(CONFIGURATION)$(EFFECTIVE_PLATFORM_NAME)
 PODS_ROOT = ${SRCROOT}
 PODS_TARGET_SRCROOT = ${PODS_ROOT}/../..
 PRODUCT_BUNDLE_IDENTIFIER = org.cocoapods.${PRODUCT_NAME:rfc1034identifier}
 SKIP_INSTALL = YES
+USE_RECURSIVE_SCRIPT_INPUTS_IN_SCRIPT_PHASES = YES
@@ -136,18 +136,18 @@
 			isa = PBXProject;
 			attributes = {
 				LastSwiftUpdateCheck = 0830;
-				LastUpgradeCheck = 1000;
+				LastUpgradeCheck = 1110;
 				ORGANIZATIONNAME = CocoaPods;
 				TargetAttributes = {
 					607FACCF1AFB9204008FA782 = {
 						CreatedOnToolsVersion = 6.3.1;
-						LastSwiftMigration = 1000;
+						LastSwiftMigration = 1110;
 					};
 				};
 			};
 			buildConfigurationList = 607FACCB1AFB9204008FA782 /* Build configuration list for PBXProject "utopia" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
 				en,
@@ -182,7 +182,7 @@
 			files = (
 			);
 			inputPaths = (
-				"${SRCROOT}/Pods/Target Support Files/Pods-utopia_Example/Pods-utopia_Example-frameworks.sh",
+				"${PODS_ROOT}/Target Support Files/Pods-utopia_Example/Pods-utopia_Example-frameworks.sh",
 				"${BUILT_PRODUCTS_DIR}/utopia/utopia.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
@@ -191,7 +191,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "\"${SRCROOT}/Pods/Target Support Files/Pods-utopia_Example/Pods-utopia_Example-frameworks.sh\"\n";
+			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-utopia_Example/Pods-utopia_Example-frameworks.sh\"\n";
 			showEnvVarsInLog = 0;
 		};
 		466881BFDDF35CB453DC3935 /* [CP] Check Pods Manifest.lock */ = {
@@ -241,6 +241,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -296,6 +297,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_LOCALIZABILITY_NONLOCALIZED = YES;
 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
 				CLANG_CXX_LIBRARY = "libc++";
 				CLANG_ENABLE_MODULES = YES;
@@ -351,7 +353,7 @@
 				MODULE_NAME = ExampleApp;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.cocoapods.demo.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Debug;
 		};
@@ -366,7 +368,7 @@
 				MODULE_NAME = ExampleApp;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.cocoapods.demo.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SWIFT_VERSION = 4.2;
+				SWIFT_VERSION = 5.0;
 			};
 			name = Release;
 		};
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1000"
+   LastUpgradeVersion = "1110"
   version = "1.3">
   <BuildAction
      parallelizeBuildables = "YES"
@@ -41,6 +41,15 @@
      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
      shouldUseLaunchSchemeArgsEnv = "YES">
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
+            BuildableName = "utopia_Example.app"
+            BlueprintName = "utopia_Example"
+            ReferencedContainer = "container:utopia.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
      <Testables>
         <TestableReference
            skipped = "NO">
@@ -53,17 +62,6 @@
            </BuildableReference>
         </TestableReference>
      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
-            BuildableName = "utopia_Example.app"
-            BlueprintName = "utopia_Example"
-            ReferencedContainer = "container:utopia.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
   </TestAction>
   <LaunchAction
      buildConfiguration = "Debug"
@@ -85,8 +83,6 @@
            ReferencedContainer = "container:utopia.xcodeproj">
         </BuildableReference>
      </BuildableProductRunnable>
-      <AdditionalOptions>
-      </AdditionalOptions>
   </LaunchAction>
   <ProfileAction
      buildConfiguration = "Release"
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
  s.name             = 'utopia'
-  s.version          = '0.1.0'
+  s.version          = '0.2.1'
  s.summary          = 'Common utilities for Swift projects'
  s.homepage         = 'https://github.com/Ramotion/utopia'
  s.license          = { :type => 'MIT', :file => 'LICENSE' }
@@ -41,7 +41,7 @@ extension KeyedDecodingContainer {
  }
  
  public func decodeSafelyIfPresent<T: Decodable>(_ type: T.Type, forKey key: KeyedDecodingContainer.Key) -> T? {
-    let decoded = try? decodeIfPresent(Safe<T>.self, forKey: key)
+    let decoded = ((try? decodeIfPresent(Safe<T>.self, forKey: key)) as Safe<T>??)
    return decoded??.value
  }
 }
@@ -67,10 +67,10 @@ public struct Id<Entity>: Hashable {
    self.raw = raw
  }
  
-  public var hashValue: Int {
-    return raw.hashValue
+  public func hash(into hasher: inout Hasher) {
+    hasher.combine(raw.hashValue)
  }
-  
+
  public static func ==(lhs: Id, rhs: Id) -> Bool {
    return lhs.raw == rhs.raw
  }
@@ -2,7 +2,7 @@ import UIKit


 public extension UIView {
-  public var backgroundImage: UIImage? {
+  var backgroundImage: UIImage? {
    get {
      guard let obj = layer.contents else { return nil }
      return UIImage(cgImage: obj as! CGImage)
@@ -21,8 +21,8 @@ public extension UIView {


 public extension UIView {
-  public final func updateOpaque() {
-    if let color = backgroundColor, color.alphaValue == 1.0, alpha == 1.0 {
+  final func updateOpaque() {
+    if let color = backgroundColor, color.rgba.a == 1.0, alpha == 1.0 {
      isOpaque = true
    }
    else {
@@ -1,23 +0,0 @@
-import UIKit
-
-public extension UIColor
-{
-  public final var redValue: CGFloat { return rgba().r }
-  public final var greenValue: CGFloat { return rgba().g }
-  public final var blueValue: CGFloat { return rgba().b }
-  public final var alphaValue: CGFloat { return rgba().a }
-  
-  private final func rgba() -> (r: CGFloat, g: CGFloat, b: CGFloat, a: CGFloat)
-  {
-    guard let components: [CGFloat] = cgColor.components else { return (0, 0, 0, 0) }
-    let numberOfComponents: Int = cgColor.numberOfComponents
-    switch numberOfComponents {
-    case 4:
-      return (components[0], components[1], components[2], components[3])
-    case 2:
-      return (components[0], components[0], components[0], components[1])
-    default:
-      return (0, 0, 0, 1)
-    }
-  }
-}
@@ -2,12 +2,12 @@ import UIKit

 public extension UIImage
 {
-    public final var isOpaque: Bool {
+    final var isOpaque: Bool {
        let alphaInfo = cgImage?.alphaInfo
        return !(alphaInfo == .first || alphaInfo == .last || alphaInfo == .premultipliedFirst || alphaInfo == .premultipliedLast)
    }

-    public final func reSize(to size: CGSize) -> UIImage {
+    final func reSize(to size: CGSize) -> UIImage {
        guard size.width > 0 && size.height > 0 else { return self }
        
        UIGraphicsBeginImageContextWithOptions(size, isOpaque, 0.0)
@@ -18,7 +18,7 @@ public extension UIImage
        return scaledImage
    }
    
-    public final func reSize(toFit size: CGSize) -> UIImage {
+    final func reSize(toFit size: CGSize) -> UIImage {
        guard size.width > 0 && size.height > 0 else { return self }
        
        let imageAspectRatio = self.size.width / self.size.height
@@ -40,7 +40,7 @@ public extension UIImage
        return scaledImage
    }
    
-    public final func reSize(toFill size: CGSize) -> UIImage {
+    final func reSize(toFill size: CGSize) -> UIImage {
        guard size.width > 0 && size.height > 0 else { return self }

        let imageAspectRatio = self.size.width / self.size.height
@@ -62,7 +62,7 @@ public extension UIImage
        return scaledImage
    }
    
-    public final func rounded(withCornerRadius radius: CGFloat, divideRadiusByImageScale: Bool = false) -> UIImage {
+    final func rounded(withCornerRadius radius: CGFloat, divideRadiusByImageScale: Bool = false) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(size, false, 0.0)
        
        let scaledRadius = divideRadiusByImageScale ? radius / scale : radius
@@ -78,7 +78,7 @@ public extension UIImage
        return roundedImage
    }
    
-    public final func roundedIntoCircle() -> UIImage {
+    final func roundedIntoCircle() -> UIImage {
        let radius = min(size.width, size.height) / 2.0
        var squareImage = self
        if size.width != size.height {
@@ -26,7 +26,7 @@ public class SwiftyImageView: UIView {

 public extension SwiftyImageView {
  
-  public enum ImageTransition {
+  enum ImageTransition {
    case noTransition
    case crossDissolve(TimeInterval)
    case curlDown(TimeInterval)
@@ -109,7 +109,7 @@ public extension SwiftyImageView {
    }
  }
  
-  public final func transition(_ imageTransition: ImageTransition, with image: UIImage) {
+  final func transition(_ imageTransition: ImageTransition, with image: UIImage) {
    
    UIView.transition(with: self, duration: imageTransition.duration, options: imageTransition.animationOptions, animations: { imageTransition.animations(self, image) }, completion: imageTransition.completion)
  }
@@ -13,7 +13,7 @@ import UIKit
 /// Extends UIBarButtonItem with signal for the action.
 public extension UIBarButtonItem {
  /// A signal that fires for each action event.
-  public var onAction: Signal<(Void)> {
+  var onAction: Signal<(Void)> {
    return getOrCreateSignal();
  }

@@ -9,77 +9,77 @@ import UIKit
 /// Extends UIControl with signals for all ui control events.
 public extension UIControl {
  /// A signal that fires for each touch down control event.
-  public var onTouchDown: Signal<(Void)> {
+  var onTouchDown: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchDown);
  }

  /// A signal that fires for each touch down repeat control event.
-  public var onTouchDownRepeat: Signal<(Void)> {
+  var onTouchDownRepeat: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchDownRepeat);
  }

  /// A signal that fires for each touch drag inside control event.
-  public var onTouchDragInside: Signal<(Void)> {
+  var onTouchDragInside: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchDragInside);
  }

  /// A signal that fires for each touch drag outside control event.
-  public var onTouchDragOutside: Signal<(Void)> {
+  var onTouchDragOutside: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchDragOutside);
  }

  /// A signal that fires for each touch drag enter control event.
-  public var onTouchDragEnter: Signal<(Void)> {
+  var onTouchDragEnter: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchDragEnter);
  }

  /// A signal that fires for each touch drag exit control event.
-  public var onTouchDragExit: Signal<(Void)> {
+  var onTouchDragExit: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchDragExit);
  }

  /// A signal that fires for each touch up inside control event.
-  public var onTouchUpInside: Signal<(Void)> {
+  var onTouchUpInside: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchUpInside);
  }

  /// A signal that fires for each primary action control event.
-  public var onPrimaryActionTriggered: Signal<(Void)> {
+  var onPrimaryActionTriggered: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.primaryActionTriggered);
  }
    
  /// A signal that fires for each touch up outside control event.
-  public var onTouchUpOutside: Signal<(Void)> {
+  var onTouchUpOutside: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchUpOutside);
  }

  /// A signal that fires for each touch cancel control event.
-  public var onTouchCancel: Signal<(Void)> {
+  var onTouchCancel: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.touchCancel);
  }

  /// A signal that fires for each value changed control event.
-  public var onValueChanged: Signal<(Void)> {
+  var onValueChanged: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.valueChanged);
  }

  /// A signal that fires for each editing did begin control event.
-  public var onEditingDidBegin: Signal<(Void)> {
+  var onEditingDidBegin: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.editingDidBegin);
  }

  /// A signal that fires for each editing changed control event.
-  public var onEditingChanged: Signal<(Void)> {
+  var onEditingChanged: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.editingChanged);
  }

  /// A signal that fires for each editing did end control event.
-  public var onEditingDidEnd: Signal<(Void)> {
+  var onEditingDidEnd: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.editingDidEnd);
  }

  /// A signal that fires for each editing did end on exit control event.
-  public var onEditingDidEndOnExit: Signal<(Void)> {
+  var onEditingDidEndOnExit: Signal<(Void)> {
    return getOrCreateSignalForUIControlEvent(.editingDidEndOnExit);
  }

@@ -29,7 +29,7 @@ public extension Dictionary {
  }
 }

-extension Optional where Wrapped: Collection {
+public extension Optional where Wrapped: Collection {
  var isNilOrEmpty: Bool {
    switch self {
    case let collection?:
@@ -80,7 +80,7 @@ public extension MutableCollection where Index == Int {
   Returns a random element from the collection.
   - returns: A random element from the collection.
   */
-  public func random() -> Iterator.Element {
+  func random() -> Iterator.Element {
    let index = Int(arc4random_uniform(UInt32(count)))
    return self[index]
  }
@@ -4,7 +4,7 @@ import CoreGraphics
 public extension Int {
  
  /// Returns a random Int point number between 0 and Int.max.
-  public static var random: Int {
+  static var random: Int {
    return Int.random(n: Int.max)
  }
  
@@ -12,7 +12,7 @@ public extension Int {
  ///
  /// - Parameter n:  Interval max
  /// - Returns:      Returns a random Int point number between 0 and n max
-  public static func random(n: Int) -> Int {
+  static func random(n: Int) -> Int {
    return Int(arc4random_uniform(UInt32(n)))
  }
  
@@ -22,7 +22,7 @@ public extension Int {
  ///   - min:    Interval minimun
  ///   - max:    Interval max
  /// - Returns:  Returns a random Int point number between 0 and n max
-  public static func random(min: Int, max: Int) -> Int {
+  static func random(min: Int, max: Int) -> Int {
    return Int.random(n: max - min + 1) + min
  }
 }
@@ -32,7 +32,7 @@ public extension Int {
 public extension Double {
  
  /// Returns a random floating point number between 0.0 and 1.0, inclusive.
-  public static var random: Double {
+  static var random: Double {
    return Double(arc4random()) / 0xFFFFFFFF
  }
  
@@ -40,7 +40,7 @@ public extension Double {
  ///
  /// - Parameter n:  Interval max
  /// - Returns:      Returns a random double point number between 0 and n max
-  public static func random(min: Double, max: Double) -> Double {
+  static func random(min: Double, max: Double) -> Double {
    return Double.random * (max - min) + min
  }
 }
@@ -50,15 +50,15 @@ public extension Double {
 public extension Float {
  
  /// Returns a random floating point number between 0.0 and 1.0, inclusive.
-  public static var random: Float {
-    return Float(arc4random()) / 0xFFFFFFFF
+  static var random: Float {
+    return Float(arc4random()) / 4294967296
  }
  
  /// Random float between 0 and n-1.
  ///
  /// - Parameter n:  Interval max
  /// - Returns:      Returns a random float point number between 0 and n max
-  public static func random(min: Float, max: Float) -> Float {
+  static func random(min: Float, max: Float) -> Float {
    return Float.random * (max - min) + min
  }
 }
@@ -68,12 +68,12 @@ public extension Float {
 public extension CGFloat {
  
  /// Randomly returns either 1.0 or -1.0.
-  public static var randomSign: CGFloat {
+  static var randomSign: CGFloat {
    return (arc4random_uniform(2) == 0) ? 1.0 : -1.0
  }
  
  /// Returns a random floating point number between 0.0 and 1.0, inclusive.
-  public static var random: CGFloat {
+  static var random: CGFloat {
    return CGFloat(Float.random)
  }
  
@@ -81,7 +81,7 @@ public extension CGFloat {
  ///
  /// - Parameter n:  Interval max
  /// - Returns:      Returns a random CGFloat point number between 0 and n max
-  public static func random(min: CGFloat, max: CGFloat) -> CGFloat {
+  static func random(min: CGFloat, max: CGFloat) -> CGFloat {
    return CGFloat.random * (max - min) + min
  }
 }
@@ -1,7 +1,7 @@
 import Foundation
 import UIKit

-extension Optional where Wrapped == String {
+public extension Optional where Wrapped == String {
  var isNilOrEmpty: Bool {
    switch self {
    case let string?:
@@ -5,9 +5,8 @@ public let none = None()
 public struct None {}

 extension None: Hashable {
-  public var hashValue: Int {
-    return 0
-  }
+  
+  public func hash(into hasher: inout Hasher) { }
 }

 public func == (lhs: None, rhs: None) -> Bool { return true }
@@ -0,0 +1,42 @@
+import UIKit
+
+public class PaginationFlowLayout: UICollectionViewFlowLayout {
+  
+  override public func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint {
+    
+    guard let collectionView = collectionView,
+      let layoutAttributes: Array = layoutAttributesForElements(in: collectionView.bounds),
+      layoutAttributes.count != 0 else {
+        return proposedContentOffset
+    }
+    
+    var firstAttribute: UICollectionViewLayoutAttributes = layoutAttributes[0]
+    for attribute: UICollectionViewLayoutAttributes in layoutAttributes {
+      guard attribute.representedElementCategory == .cell else { continue }
+      
+      switch scrollDirection {
+      case .horizontal:
+        if((velocity.x > 0.0 && attribute.center.x > firstAttribute.center.x) ||
+          (velocity.x <= 0.0 && attribute.center.x < firstAttribute.center.x)) {
+          firstAttribute = attribute;
+        }
+      case .vertical:
+        if((velocity.y > 0.0 && attribute.center.y > firstAttribute.center.y) ||
+          (velocity.y <= 0.0 && attribute.center.y < firstAttribute.center.y)) {
+          firstAttribute = attribute;
+        }
+      @unknown default:
+        fatalError()
+      }
+    }
+    
+    switch scrollDirection {
+    case .horizontal:
+      return CGPoint(x: firstAttribute.center.x - collectionView.bounds.size.width * 0.5, y: proposedContentOffset.y)
+    case .vertical:
+      return CGPoint(x: proposedContentOffset.x, y: firstAttribute.center.y - collectionView.bounds.size.height * 0.5)
+    @unknown default:
+      fatalError()
+    }
+  }
+}
@@ -0,0 +1,50 @@
+import Foundation
+import UIKit
+
+
+final class SnappingFlowLayout: UICollectionViewFlowLayout {
+    
+    override func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint {
+        
+        guard let collectionView = collectionView else {
+            return super.targetContentOffset(forProposedContentOffset: proposedContentOffset, withScrollingVelocity: velocity)
+        }
+        
+        var offsetAdjustment = CGFloat.greatestFiniteMagnitude
+        switch scrollDirection {
+        case .horizontal:
+            let horizontalOffset = proposedContentOffset.x + collectionView.contentInset.left
+            
+            let targetRect = CGRect(x: proposedContentOffset.x, y: 0, width: collectionView.bounds.size.width, height: collectionView.bounds.size.height)
+            
+            let layoutAttributesArray = super.layoutAttributesForElements(in: targetRect)
+            
+            layoutAttributesArray?.forEach { layoutAttributes in
+                let itemOffset = layoutAttributes.frame.origin.x
+                if fabsf(Float(itemOffset - horizontalOffset)) < fabsf(Float(offsetAdjustment)) {
+                    offsetAdjustment = itemOffset - horizontalOffset
+                }
+            }
+            let result = CGPoint(x: proposedContentOffset.x + offsetAdjustment, y: proposedContentOffset.y)
+            return result
+            
+        case .vertical:
+            let verticalOffset = proposedContentOffset.y + collectionView.contentInset.top
+            
+            let targetRect = CGRect(x: 0, y: proposedContentOffset.y, width: collectionView.bounds.size.width, height: collectionView.bounds.size.height)
+            
+            let layoutAttributesArray = super.layoutAttributesForElements(in: targetRect)
+            layoutAttributesArray?.forEach { layoutAttributes in
+                let itemOffset = layoutAttributes.frame.origin.y
+                if fabsf(Float(itemOffset - verticalOffset)) < fabsf(Float(offsetAdjustment)) {
+                    offsetAdjustment = itemOffset - verticalOffset
+                }
+            }
+            
+            let result = CGPoint(x: proposedContentOffset.x, y: proposedContentOffset.y + offsetAdjustment)
+            return result
+        @unknown default:
+          fatalError()
+      }
+    }
+}
@@ -0,0 +1,210 @@
+import Foundation
+import UIKit
+
+public final class VerticalAlignmentLayout: UICollectionViewFlowLayout {
+    
+    // KVO
+    fileprivate struct KVO {
+        
+        var keyPath: String
+        var options: NSKeyValueObservingOptions
+        var context: Int
+        
+        static var contentOffset = KVO(
+            keyPath: #keyPath(UICollectionViewFlowLayout.collectionView.contentOffset),
+            options: .new,
+            context: 0
+        )
+        
+        static var bounds = KVO(
+            keyPath: #keyPath(UICollectionViewFlowLayout.collectionView.bounds),
+            options: .new,
+            context: 1
+        )
+    }
+    
+    public enum Alignment {
+        case top
+        case center
+        case bottom
+    }
+    
+    // Properties
+    public var currentPage: Int?
+    public var currentPageDidChange: (Int) -> Void = { _ in }
+    let alignment: Alignment
+    
+    var collectionHeight: CGFloat {
+        guard let collection = collectionView else { return 0 }
+        return collection.bounds.size.height - collection.contentInset.top - collection.contentInset.bottom
+    }
+    
+    deinit {
+        removeObserver(self, forKeyPath: KVO.bounds.keyPath, context: &KVO.bounds.context)
+    }
+    
+    public init(itemSize: CGSize, spacing: CGFloat, alignment: Alignment) {
+        self.alignment = alignment
+        super.init()
+        self.itemSize = itemSize
+        self.scrollDirection = .vertical
+        self.minimumLineSpacing = spacing
+        
+        addObserver(self,
+                    forKeyPath: KVO.bounds.keyPath,
+                    options: KVO.bounds.options,
+                    context: &KVO.bounds.context)
+        
+        addObserver(self,
+                    forKeyPath: KVO.contentOffset.keyPath,
+                    options: KVO.contentOffset.options,
+                    context: &KVO.contentOffset.context)
+    }
+    
+    public required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") }
+}
+
+// MARK: override
+extension VerticalAlignmentLayout {
+    
+    public override func prepare() {
+        switch alignment {
+        case .top:
+            sectionInset.top = 0
+            sectionInset.bottom = collectionHeight - itemSize.height
+        case .center:
+            let inset = (collectionHeight - itemSize.height) / 2
+            sectionInset.top = inset
+            sectionInset.bottom = inset
+        case .bottom:
+            sectionInset.top = collectionHeight - itemSize.height
+            sectionInset.bottom = 0
+        }
+        super.prepare()
+    }
+    
+    public override func targetContentOffset(forProposedContentOffset proposedContentOffset: CGPoint, withScrollingVelocity velocity: CGPoint) -> CGPoint {
+        
+        guard let collectionView = self.collectionView else {
+            return proposedContentOffset
+        }
+        
+        let proposedRect = CGRect(x: proposedContentOffset.x, y: 0, width: collectionView.bounds.width, height: collectionView.bounds.height)
+        
+        guard let layoutAttributes = self.layoutAttributesForElements(in: proposedRect) else {
+            return proposedContentOffset
+        }
+        
+        var candidateAttributes: UICollectionViewLayoutAttributes?
+        let proposedContentOffsetY: CGFloat
+        switch alignment {
+        case .top:
+            proposedContentOffsetY = proposedContentOffset.y + itemSize.height / 2
+        case .center:
+            proposedContentOffsetY = proposedContentOffset.y + collectionView.bounds.height / 2
+        case .bottom:
+            proposedContentOffsetY = proposedContentOffset.y + collectionView.bounds.height
+        }
+        
+        for attributes in layoutAttributes {
+            guard attributes.representedElementCategory == .cell else { continue }
+            
+            if candidateAttributes == nil {
+                candidateAttributes = attributes
+                continue
+            }
+            
+            let attributePosition: CGFloat
+            let candidatePosition: CGFloat
+            switch alignment {
+            case .top:
+                attributePosition = attributes.frame.minY
+                candidatePosition = candidateAttributes!.frame.minY
+            case .center:
+                attributePosition = attributes.center.y
+                candidatePosition = candidateAttributes!.center.y
+            case .bottom:
+                attributePosition = attributes.frame.maxY
+                candidatePosition = candidateAttributes!.frame.maxY
+            }
+            
+            if abs(attributePosition - proposedContentOffsetY) < abs(candidatePosition - proposedContentOffsetY) {
+                candidateAttributes = attributes
+            }
+        }
+        
+        guard let aCandidateAttributes = candidateAttributes else {
+            return proposedContentOffset
+        }
+        
+        var newOffsetY: CGFloat
+        switch alignment {
+        case .top:
+            newOffsetY = aCandidateAttributes.frame.minY - collectionView.contentInset.top
+        case .center:
+            newOffsetY = aCandidateAttributes.center.y - collectionView.bounds.size.height / 2
+        case .bottom:
+            newOffsetY = aCandidateAttributes.frame.minY - collectionView.bounds.size.height + itemSize.width
+        }
+        
+        let offset = newOffsetY - collectionView.contentOffset.y
+        
+        if (velocity.y < 0 && offset > 0) || (velocity.y > 0 && offset < 0) {
+            let pageHeight = itemSize.height + minimumLineSpacing
+            newOffsetY += velocity.y > 0 ? pageHeight : -pageHeight
+        }
+        
+        return CGPoint(x: proposedContentOffset.x, y: newOffsetY)
+    }
+    
+    public override func shouldInvalidateLayout(forBoundsChange newBounds: CGRect) -> Bool {
+        return true
+    }
+    
+    public override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
+        switch context {
+        case (&KVO.bounds.context)?:
+            // TODO: Current layout makes hack for first item to appear in the center.
+            // (method configure Insets). Settings insets shouldn't be done in invalidateLayout.
+            // Layout should handle appear state on it's own.
+            let oldValue = change?[.oldKey] as? NSValue
+            let newValue = change?[.newKey] as? NSValue
+            if oldValue?.cgRectValue != newValue?.cgRectValue {
+                invalidateLayout()
+            }
+            
+        case (&KVO.contentOffset.context)?:
+            guard let collectionView = collectionView, collectionView.frame.size != CGSize.zero else {
+                return
+            }
+            
+            let visibleRect = CGRect(origin: collectionView.contentOffset, size: collectionView.frame.size)
+            let layoutAttributes = layoutAttributesForElements(in: visibleRect)
+            
+            let center: CGFloat
+            switch alignment {
+            case .top:
+                let middle = collectionView.contentInset.top + itemSize.height / 2
+                center = collectionView.contentOffset.y + middle
+            case .center:
+                let middle = collectionView.frame.height / 2
+                center = collectionView.contentOffset.y + middle
+            case .bottom:
+                let middle = collectionView.frame.height - collectionView.contentInset.bottom - itemSize.height / 2
+                center = collectionView.contentOffset.y + middle
+            }
+            
+            let closestAttribute = layoutAttributes?.sorted {
+                abs($0.center.y - center) < abs($1.center.y - center)
+            }.first
+            if let closestAttribute = closestAttribute, currentPage != closestAttribute.indexPath.row {
+                currentPage = closestAttribute.indexPath.row
+                if let currentPage = currentPage {
+                    currentPageDidChange(currentPage)
+                }
+            }
+        default:
+            super.observeValue(forKeyPath: keyPath, of: object, change: change, context: context)
+        }
+    }
+}
@@ -3,7 +3,7 @@ import UIKit
 public extension CALayer {

  @discardableResult
-  public func add(to superlayer: CALayer) -> Self {
+  func add(to superlayer: CALayer) -> Self {
    superlayer.addSublayer(self)
    return self
  }
@@ -11,7 +11,7 @@ public extension CALayer {

 public extension CATransaction {
  
-  public static func withoutActions(_ block: () -> Void) {
+  static func withoutActions(_ block: () -> Void) {
    begin()
    setDisableActions(true)
    block()
@@ -1,11 +1,3 @@
-//
-//  CoreGraphics+ext.swift
-//  Vendefy
-//
-//  Created by Dmitriy Kalachev on 4/8/18.
-//  Copyright © 2018 Ramotion. All rights reserved.
-//
-
 import UIKit

 public extension CGSize {
@@ -14,13 +6,13 @@ public extension CGSize {
    self.init(width: value, height: value)
  }

-  init(_ width: CGFloat, _ height: CGFloat) {
-    self.init(width: width, height: height)
-  }
-
  var asRect: CGRect {
    return CGRect(size: self)
  }
+    
+  init(_ width: CGFloat, _ height: CGFloat) {
+    self.init(width: width, height: height)
+  }

  func centered(in rect: CGRect) -> CGRect {
    var result = self.asRect
@@ -29,14 +21,29 @@ public extension CGSize {
    return result
  }

+  func centered(in size: CGSize) -> CGRect {
+    return centered(in: CGRect(origin: .zero, size: size))
+  }
+    
  var asPixelsForMainScreen: CGSize {
    return self * UIScreen.main.scale
  }

+  var center: CGPoint {
+    return CGPoint(x: width / 2, y: height / 2)
+  }
+    
+  static var greatestFiniteMagnitude: CGSize {
+    return CGSize(width: CGFloat.greatestFiniteMagnitude, height: CGFloat.greatestFiniteMagnitude)
+  }
+    
+  var area: CGFloat {
+    return width * height
+  }
 }

 public extension UIEdgeInsets {
-  public init(value: CGFloat) {
+  init(value: CGFloat) {
    self.init(top: value, left: value, bottom: value, right: value)
  }
 }
@@ -59,6 +66,13 @@ public extension CGRect {
    return CGPoint(x: midX, y: midY)
  }

+  func insetBy(insets: UIEdgeInsets) -> CGRect {
+    let x = origin.x + insets.left
+    let y = origin.y + insets.top
+    let w = size.width - insets.left - insets.right
+    let h = size.height - insets.top - insets.bottom
+    return CGRect(x: x, y: y, width: w, height: h)
+  }
 }

 public extension CGAffineTransform {
@@ -66,7 +80,6 @@ public extension CGAffineTransform {
  init(scale: CGFloat) {
    self.init(scaleX: scale, y: scale)
  }
-
 }

 public func + (lhs: CGPoint, rhs: CGPoint) -> CGPoint {
@@ -7,7 +7,7 @@ public extension UIButton {
  /// - bottom: title below button image
  /// - left: title to the left of button image
  /// - right: title to the right of button image
-  public enum Position: Int {
+  enum Position: Int {
    case top, bottom, left, right
  }
  
@@ -20,7 +20,7 @@ public extension UIButton {
  ///   - titlePosition: UIViewContentModeTop, UIViewContentModeBottom, UIViewContentModeLeft or UIViewContentModeRight
  ///   - additionalSpacing: Spacing between image and title
  ///   - state: State to apply this behaviour
-  public func set(image: UIImage?, title: String, titlePosition: Position, spacing: CGFloat, state: UIControl.State){
+  func set(image: UIImage?, title: String, titlePosition: Position, spacing: CGFloat, state: UIControl.State){
    imageView?.contentMode = .center
    setImage(image, for: state)
    setTitle(title, for: state)
@@ -39,7 +39,7 @@ public extension UIButton {
  ///   - titlePosition: UIViewContentModeTop, UIViewContentModeBottom, UIViewContentModeLeft or UIViewContentModeRight
  ///   - additionalSpacing: Spacing between image and title
  ///   - state: State to apply this behaviour
-  public func set(image: UIImage?, attributedTitle title: NSAttributedString, titlePosition: Position, spacing: CGFloat, state: UIControl.State){
+  func set(image: UIImage?, attributedTitle title: NSAttributedString, titlePosition: Position, spacing: CGFloat, state: UIControl.State){
    imageView?.contentMode = .center
    setImage(image, for: state)
    
@@ -15,7 +15,7 @@ public extension UINavigationController {
  }

  func replace(_ vc: UIViewController, with replacementVC: UIViewController, animated: Bool = true) {
-    guard let index = self.viewControllers.index(of: vc)
+    guard let index = self.viewControllers.firstIndex(of: vc)
      else { return }

    var viewControllers = self.viewControllers
@@ -3,31 +3,31 @@ import UIKit
 public extension UIView {
  
  @discardableResult
-  public func add(to superview: UIView) -> Self {
+  func add(to superview: UIView) -> Self {
    superview.addSubview(self)
    return self
  }
  
  @discardableResult
-  public func insert(to superview: UIView, at index: Int) -> Self {
+  func insert(to superview: UIView, at index: Int) -> Self {
    superview.insertSubview(self, at: index)
    return self
  }
  
  @discardableResult
-  public func insert(to superview: UIView, above view: UIView) -> Self {
+  func insert(to superview: UIView, above view: UIView) -> Self {
    superview.insertSubview(self, aboveSubview: view)
    return self
  }
  
  @discardableResult
-  public func insert(to superview: UIView, below view: UIView) -> Self {
+  func insert(to superview: UIView, below view: UIView) -> Self {
    superview.insertSubview(self, belowSubview: view)
    return self
  }
  
  @discardableResult
-  public func add(to stackview: UIStackView) -> Self {
+  func add(to stackview: UIStackView) -> Self {
    stackview.addArrangedSubview(self)
    return self
  }
@@ -182,7 +182,7 @@ public extension UIView {
        static var viewExtension = "viewExtensionKeyboardVisibilityController"
    }
    
-    public var keyboardVisibilityController: InputVisibilityController? {
+    var keyboardVisibilityController: InputVisibilityController? {
        get {
            return objc_getAssociatedObject(self, &KeyboardAssociatedKey.viewExtension) as? InputVisibilityController ?? nil
        }
@@ -192,7 +192,7 @@ public extension UIView {
    }
    
    @discardableResult
-    public func addInputVisibilityController() -> InputVisibilityController {
+    func addInputVisibilityController() -> InputVisibilityController {
        var keyboardController = self.keyboardVisibilityController
        
        if keyboardController == nil {
@@ -211,14 +211,14 @@ public extension UIView {
        return keyboardVisibilityController!
    }
    
-    public func removeKeyboardVisibilityController() {
+    func removeKeyboardVisibilityController() {
        keyboardVisibilityController = nil
    }
 }

 public extension UIView {
    
-    public func findFirstResponder() -> UIView? {
+    func findFirstResponder() -> UIView? {
        if isFirstResponder {
            return self
        }
@@ -4,7 +4,7 @@ import UIKit

 public extension UIView {
  
-  public func snapshotImage(opaque: Bool = true, scale: CGFloat = UIScreen.main.scale * 2, afterScreenUpdates: Bool = false) -> UIImage? {
+  func snapshotImage(opaque: Bool = true, scale: CGFloat = UIScreen.main.scale * 2, afterScreenUpdates: Bool = false) -> UIImage? {
    UIGraphicsBeginImageContextWithOptions(bounds.size, opaque, scale)
    drawHierarchy(in: bounds, afterScreenUpdates: afterScreenUpdates)
    let snapshotImage = UIGraphicsGetImageFromCurrentImageContext()
@@ -12,7 +12,7 @@ public extension UIView {
    return snapshotImage
  }
  
-  public func snapshotView(opaque: Bool = true, scale: CGFloat = UIScreen.main.scale * 2, afterScreenUpdates: Bool = false) -> UIView? {
+  func snapshotView(opaque: Bool = true, scale: CGFloat = UIScreen.main.scale * 2, afterScreenUpdates: Bool = false) -> UIView? {
    if let snapshotImage = snapshotImage(opaque: opaque, scale: scale, afterScreenUpdates: afterScreenUpdates) {
      return UIImageView(image: snapshotImage)
    } else {
@@ -20,7 +20,7 @@ public extension UIView {
    }
  }
  
-  public func snapshotLayer(opaque: Bool = true, scale: CGFloat = UIScreen.main.scale * 2) -> UIImage? {
+  func snapshotLayer(opaque: Bool = true, scale: CGFloat = UIScreen.main.scale * 2) -> UIImage? {
    
    UIGraphicsBeginImageContextWithOptions(bounds.size, opaque, scale)
    guard let context = UIGraphicsGetCurrentContext() else { return nil }
@@ -2,10 +2,14 @@ import Foundation
 import UIKit

 public protocol Togglable: class {
+  var isOn: Bool { get }
  func selectedToggle(select: Bool)
 }

 extension UIControl: Togglable {
+  
+  public var isOn: Bool { return isSelected }
+    
  @objc public func selectedToggle(select: Bool) {
    isSelected = select
  }
@@ -22,9 +26,13 @@ extension UISwitch {
 public struct Toggler {
  var togglers = [Togglable]()
  
+  public var index: Int {
+    return togglers.firstIndex(where: { $0.isOn }) ?? 0
+  }
+    
  public init(default index: Int = 0, togglers: [Togglable]) {
    self.togglers = togglers
-    toggleControl(toggle: togglers[index], togglers: togglers)
+    onAt(index: index)
  }
  
  public func on(toggle: Togglable) {
@@ -32,7 +40,9 @@ public struct Toggler {
  }
  
  public func onAt(index: Int) {
-    toggleControl(toggle: togglers[index], togglers: togglers)
+    if let toggler = togglers.at(index) {
+        toggleControl(toggle: toggler, togglers: togglers)
+    }
  }
  
  public mutating func add(toggle: Togglable) {
@@ -109,7 +109,20 @@ import UIKit
      setNeedsDisplay()
    }
  }
-  
+    
+  public override init(frame: CGRect) {
+    super.init(frame: frame)
+    setup()
+  }
+    
+  required public init?(coder aDecoder: NSCoder) {
+    super.init(coder: aDecoder)
+    setup()
+  }
+    
+  private func setup() {
+    backgroundColor = .clear
+  }
  
  // MARK: - UIView
  override open func draw(_ rect: CGRect) {
@@ -7,9 +7,9 @@ private class Associated<T>: NSObject {
  }
 }

-protocol Associable {}
+public protocol Associable {}

-extension Associable where Self: AnyObject {
+public extension Associable where Self: AnyObject {
  
  func getAssociatedObject<T>(_ key: UnsafeRawPointer) -> T? {
    return (objc_getAssociatedObject(self, key) as? Associated<T>).map { $0.value }
@@ -2,19 +2,19 @@ import Foundation

 public extension Bundle {
  
-  public var appName: String {
+  var appName: String {
    return infoDictionary?["CFBundleName"] as! String
  }
  
-  public var bundleId: String {
+  var bundleId: String {
    return bundleIdentifier!
  }
  
-  public var versionNumber: String {
+  var versionNumber: String {
    return infoDictionary?["CFBundleShortVersionString"] as! String
  }
  
-  public var buildNumber: String {
+  var buildNumber: String {
    return infoDictionary?["CFBundleVersion"] as! String
  }
 }
@@ -5,6 +5,24 @@ public enum Math {
  public static func lerp<T: FloatingPoint>(from: T, to: T, progress: T) -> T {
    return from + progress * (to - from);
  }
+  
+  public static func lerp(from: UIColor, to: UIColor, progress: CGFloat) -> UIColor {
+    let rgba1 = from.rgba
+    let rgba2 = to.rgba
+    let r = lerp(from: rgba1.r, to: rgba2.r, progress: progress)
+    let g = lerp(from: rgba1.g, to: rgba2.g, progress: progress)
+    let b = lerp(from: rgba1.b, to: rgba2.b, progress: progress)
+    let a = lerp(from: rgba1.a, to: rgba2.a, progress: progress)
+    return UIColor(red: r, green: g, blue: b, alpha: a)
+  }
+  
+  public static func lerp(from: CGRect, to: CGRect, progress: CGFloat) -> CGRect {
+    let x = lerp(from: from.origin.x, to: to.origin.x, progress: progress)
+    let y = lerp(from: from.origin.y, to: to.origin.y, progress: progress)
+    let w = lerp(from: from.size.width, to: to.size.width, progress: progress)
+    let h = lerp(from: from.size.height, to: to.size.height, progress: progress)
+    return CGRect(x: x, y: y, width: w, height: h)
+  }
 }

 public enum Progress {
@@ -0,0 +1,515 @@
+import Foundation
+
+extension NSAttributedString {
+    /**
+    Returns a new mutable string with characters from a given character set removed.
+
+    See http://panupan.com/2012/06/04/trim-leading-and-trailing-whitespaces-from-nsmutableattributedstring/
+
+    - Parameters:
+      - charSet: The character set with which to remove characters.
+    - returns: A new string with the matching characters removed.
+    */
+    public func trimmingCharacters(in set: CharacterSet) -> NSAttributedString {
+        let modString = NSMutableAttributedString(attributedString: self)
+        modString.trimCharacters(in: set)
+        return NSAttributedString(attributedString: modString)
+    }
+}
+
+
+extension NSMutableAttributedString {
+    /**
+    Modifies this instance of the string to remove characters from a given character set from
+    the beginning and end of the string.
+
+    See http://panupan.com/2012/06/04/trim-leading-and-trailing-whitespaces-from-nsmutableattributedstring/
+
+    - Parameters:
+      - charSet: The character set with which to remove characters.
+    */
+    public func trimCharacters(in set: CharacterSet) {
+        var range = (string as NSString).rangeOfCharacter(from: set)
+
+        // Trim leading characters from character set.
+        while range.length != 0 && range.location == 0 {
+            replaceCharacters(in: range, with: "")
+            range = (string as NSString).rangeOfCharacter(from: set)
+        }
+
+        // Trim trailing characters from character set.
+        range = (string as NSString).rangeOfCharacter(from: set, options: .backwards)
+        while range.length != 0 && NSMaxRange(range) == length {
+            replaceCharacters(in: range, with: "")
+            range = (string as NSString).rangeOfCharacter(from: set, options: .backwards)
+        }
+    }
+
+}
+
+
+extension NSMutableAttributedString {
+    
+    private var range: NSRange {
+        return NSRange(location: 0, length: length)
+    }
+    
+    private var paragraphStyle: NSMutableParagraphStyle {
+        let style = attributes(at: 0, effectiveRange: nil)[.paragraphStyle] as? NSMutableParagraphStyle
+        return style ?? NSMutableParagraphStyle()
+    }
+    
+}
+
+// MARK: - Font
+
+extension NSMutableAttributedString {
+    /**
+     Applies a font to the entire string.
+     
+     - parameter font: The font.
+     */
+    @discardableResult
+    public func font(_ font: UIFont) -> Self {
+        if length > 0 {
+            addAttribute(.font, value: font, range: range)
+        }
+        return self
+    }
+    
+    /**
+     Applies a font to the entire string.
+     
+     - parameter name: The font name.
+     - parameter size: The font size.
+     
+     Note: If the specified font name cannot be loaded, this method will fallback to the system font at the specified size.
+     */
+    @discardableResult
+    public func font(name: String, size: CGFloat) -> Self {
+        if length > 0 {
+            addAttribute(.font, value: UIFont(name: name, size: size) ?? .systemFont(ofSize: size), range: range)
+        }
+        return self
+    }
+}
+
+// MARK: - Paragraph style
+
+extension NSMutableAttributedString {
+    
+    /**
+     Applies a text alignment to the entire string.
+     
+     - parameter alignment: The text alignment.
+     */
+    @discardableResult
+    public func alignment(_ alignment: NSTextAlignment) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.alignment = alignment
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies line spacing to the entire string.
+     
+     - parameter lineSpacing: The line spacing amount.
+     */
+    @discardableResult
+    public func lineSpacing(_ lineSpacing: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.lineSpacing = lineSpacing
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies paragraph spacing to the entire string.
+     
+     - parameter paragraphSpacing: The paragraph spacing amount.
+     */
+    @discardableResult
+    public func paragraphSpacing(_ paragraphSpacing: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.paragraphSpacing = paragraphSpacing
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a line break mode to the entire string.
+     
+     - parameter mode: The line break mode.
+     */
+    @discardableResult
+    public func lineBreak(_ mode: NSLineBreakMode) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.lineBreakMode = mode
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+
+    /**
+     Applies a line height multiplier to the entire string.
+     
+     - parameter multiple: The line height multiplier.
+     */
+    @discardableResult
+    public func lineHeight(multiple: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.lineHeightMultiple = multiple
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a first line head indent to the string.
+     
+     - parameter indent: The first line head indent amount.
+     */
+    @discardableResult
+    public func firstLineHeadIndent(_ indent: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.firstLineHeadIndent = indent
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a head indent to the string.
+     
+     - parameter indent: The head indent amount.
+     */
+    @discardableResult
+    public func headIndent(_ indent: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.headIndent = indent
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a tail indent to the string.
+     
+     - parameter indent: The tail indent amount.
+     */
+    @discardableResult
+    public func tailIndent(_ indent: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.tailIndent = indent
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+
+    /**
+     Applies a minimum line height to the entire string.
+     
+     - parameter height: The minimum line height.
+     */
+    @discardableResult
+    public func minimumLineHeight(_ height: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.minimumLineHeight = height
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a maximum line height to the entire string.
+     
+     - parameter height: The maximum line height.
+     */
+    @discardableResult
+    public func maximumLineHeight(_ height: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.maximumLineHeight = height
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a base writing direction to the entire string.
+     
+     - parameter direction: The base writing direction.
+     */
+    @discardableResult
+    public func baseWritingDirection(_ direction: NSWritingDirection) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.baseWritingDirection = direction
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a paragraph spacing before amount to the string.
+     
+     - parameter spacing: The distance between the paragraph’s top and the beginning of its text content.
+     */
+    @discardableResult
+    public func paragraphSpacingBefore(_ spacing: CGFloat) -> Self {
+        if length > 0 {
+            let paragraphStyle = self.paragraphStyle
+            paragraphStyle.paragraphSpacingBefore = spacing
+            
+            addAttribute(.paragraphStyle, value: paragraphStyle, range: range)
+        }
+        
+        return self
+    }
+}
+
+// MARK: - Foreground color
+
+extension NSMutableAttributedString {
+    /**
+     Applies the given color over the entire string, as the foreground color.
+     
+     - parameter color: The color to apply.
+     */
+    @discardableResult @nonobjc
+    public func color(_ color: UIColor, alpha: CGFloat = 1) -> Self {
+        if length > 0 {
+            addAttribute(.foregroundColor, value: color.withAlphaComponent(alpha), range: range)
+        }
+        return self
+    }
+    
+    /**
+     Applies the given color over the entire string, as the foreground color.
+     
+     - parameter color: The color to apply.
+     */
+    @discardableResult
+    public func color(red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat = 1) -> Self {
+        if length > 0 {
+            addAttribute(.foregroundColor, value: UIColor(red: red, green: green, blue: blue, alpha: alpha), range: range)
+        }
+        return self
+    }
+    
+    /**
+     Applies the given color over the entire string, as the foreground color.
+     
+     - parameter color: The color to apply.
+     */
+    @discardableResult
+    public func color(white: CGFloat, alpha: CGFloat = 1) -> Self {
+        if length > 0 {
+            addAttribute(.foregroundColor, value: UIColor(white: white, alpha: alpha), range: range)
+        }
+        return self
+    }
+}
+
+// MARK: - Underline, kern, strikethrough, stroke, shadow, text effect
+
+extension NSMutableAttributedString {
+    /**
+     Applies a single underline under the entire string.
+     
+     - parameter style: The `NSUnderlineStyle` to apply. Defaults to `.styleSingle`.
+     */
+    @discardableResult
+    public func underline(style: NSUnderlineStyle = .single, color: UIColor? = nil) -> Self {
+        if length > 0 {
+            addAttribute(.underlineStyle, value: style.rawValue, range: range)
+            
+            if let color = color {
+                addAttribute(.underlineColor, value: color, range: range)
+            }
+        }
+        
+        return self
+    }
+
+    /**
+     Applies a kern (spacing) value to the entire string.
+     
+     - parameter value: The space between each character in the string.
+     */
+    @discardableResult
+    public func kern(_ value: CGFloat) -> Self {
+        if length > 0 {
+            addAttribute(.kern, value: value, range: range)
+        }
+        return self
+    }
+    
+    /**
+     Applies a strikethrough to the entire string.
+     
+     - parameter style: The `NSUnderlineStyle` to apply. Defaults to `.styleSingle`.
+     - parameter color: The underline color. Defaults to the color of the text.
+     */
+    @discardableResult
+    public func strikethrough(style: NSUnderlineStyle = .single, color: UIColor? = nil) -> Self {
+        if length > 0 {
+            addAttribute(.strikethroughStyle, value: style.rawValue, range: range)
+            
+            if let color = color {
+                addAttribute(.strikethroughColor, value: color, range: range)
+            }
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a stroke to the entire string.
+     
+     - parameter color: The stroke color.
+     - parameter width: The stroke width.
+     */
+    @discardableResult
+    public func stroke(color: UIColor, width: CGFloat) -> Self {
+        if length > 0 {
+            addAttributes([
+                .strokeColor : color,
+                .strokeWidth : width
+            ], range: range)
+        }
+        
+        return self
+    }
+    
+    /**
+     Applies a shadow to the entire string.
+     
+     - parameter color: The shadow color.
+     - parameter radius: The shadow blur radius.
+     - parameter offset: The shadow offset.
+     */
+    @discardableResult
+    public func shadow(color: UIColor, radius: CGFloat, offset: CGSize) -> Self {
+        if length > 0 {
+            let shadow = NSShadow()
+            shadow.shadowColor = color
+            shadow.shadowBlurRadius = radius
+            shadow.shadowOffset = offset
+            
+            addAttribute(.shadow, value: shadow, range: range)
+        }
+        
+        return self
+    }
+    
+}
+
+// MARK: - Background color
+
+extension NSMutableAttributedString {
+    
+    /**
+     Applies a background color to the entire string.
+     
+     - parameter color: The color to apply.
+     */
+    @discardableResult @nonobjc
+    public func backgroundColor(_ color: UIColor, alpha: CGFloat = 1) -> Self {
+        if length > 0 {
+            addAttribute(.backgroundColor, value: color.withAlphaComponent(alpha), range: range)
+        }
+        return self
+    }
+    
+    /**
+     Applies a background color to the entire string.
+     
+     - parameter red: The red color component.
+     - parameter green: The green color component.
+     - parameter blue: The blue color component.
+     - parameter alpha: The alpha component.
+     */
+    @discardableResult
+    public func backgroundColor(red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat = 1) -> Self {
+        if length > 0 {
+            addAttribute(.backgroundColor, value: UIColor(red: red, green: green, blue: blue, alpha: alpha), range: range)
+        }
+        return self
+    }
+    
+    /**
+     Applies a background color to the entire string.
+     
+     - parameter white: The white color component.
+     - parameter alpha: The alpha component.
+     */
+    @discardableResult
+    public func backgroundColor(white: CGFloat, alpha: CGFloat = 1) -> Self {
+        if length > 0 {
+            addAttribute(.backgroundColor, value: UIColor(white: white, alpha: alpha), range: range)
+        }
+        return self
+    }
+}
+
+extension NSMutableAttributedString {
+    
+    /**
+     Applies a baseline offset to the entire string.
+     
+     - parameter offset: The offset value.
+     */
+    @discardableResult
+    public func baselineOffset(_ offset: Float) -> Self {
+        if length > 0 {
+            addAttribute(.baselineOffset, value: NSNumber(value: offset), range: range)
+        }
+        return self
+    }
+}
+
+public func +(lhs: NSMutableAttributedString, rhs: NSAttributedString) -> NSMutableAttributedString {
+    let lhs = NSMutableAttributedString(attributedString: lhs)
+    lhs.append(rhs)
+    return lhs
+}
+
+public func +=(lhs: NSMutableAttributedString, rhs: NSAttributedString) {
+    lhs.append(rhs)
+}
@@ -80,7 +80,7 @@ public class Reachability {
  public var whenReachable: NetworkReachable?
  public var whenUnreachable: NetworkUnreachable?

-  @available(*, deprecated: 4.0, renamed: "allowsCellularConnection")
+  @available(*, deprecated, renamed: "allowsCellularConnection")
  public let reachableOnWWAN: Bool = true

  /// Set to `false` to force Reachability.connection to .none when on cellular connection (default value `true`)
@@ -89,7 +89,7 @@ public class Reachability {
  // The notification center on which "reachability changed" events are being posted
  public var notificationCenter: NotificationCenter = NotificationCenter.default

-  @available(*, deprecated: 4.0, renamed: "connection.description")
+  @available(*, deprecated, renamed: "connection.description")
  public var currentReachabilityString: String {
    return "\(connection)"
  }
@@ -204,43 +204,6 @@ public extension Reachability {
    SCNetworkReachabilitySetDispatchQueue(reachabilityRef, nil)
  }

-  // MARK: - *** Connection test methods ***
-  @available(*, deprecated: 4.0, message: "Please use `connection != .none`")
-  var isReachable: Bool {
-    guard isReachableFlagSet else { return false }
-
-    if isConnectionRequiredAndTransientFlagSet {
-      return false
-    }
-
-    if isRunningOnDevice {
-      if isOnWWANFlagSet && !reachableOnWWAN {
-        // We don't want to connect when on cellular connection
-        return false
-      }
-    }
-
-    return true
-  }
-
-  @available(*, deprecated: 4.0, message: "Please use `connection == .cellular`")
-  var isReachableViaWWAN: Bool {
-    // Check we're not on the simulator, we're REACHABLE and check we're on WWAN
-    return isRunningOnDevice && isReachableFlagSet && isOnWWANFlagSet
-  }
-
-  @available(*, deprecated: 4.0, message: "Please use `connection == .wifi`")
-  var isReachableViaWiFi: Bool {
-    // Check we're reachable
-    guard isReachableFlagSet else { return false }
-
-    // If reachable we're reachable, but not on an iOS device (i.e. simulator), we must be on WiFi
-    guard isRunningOnDevice else { return true }
-
-    // Check we're NOT on WWAN
-    return !isOnWWANFlagSet
-  }
-
  var description: String {
    let W = isRunningOnDevice ? (isOnWWANFlagSet ? "W" : "-") : "X"
    let R = isReachableFlagSet ? "R" : "-"
@@ -0,0 +1,330 @@
+import Foundation
+
+extension String {
+    
+    /// Converts self to an unsigned byte array.
+    public var bytes: [UInt8] {
+        return utf8.map { $0 }
+    }
+    
+    /// Converts self to an NSMutableAttributedString.
+    public var attributed: NSMutableAttributedString {
+        return NSMutableAttributedString(string: self)
+    }
+    
+    /// Converts self to an NSString.
+    public var ns: NSString {
+        return self as NSString
+    }
+    
+    /**
+     Converts string to camel-case.
+
+     Examples:
+
+     ```
+     "os version".camelCasedString                 // "osVersion"
+     "HelloWorld".camelCasedString                 // "helloWorld"
+     "someword With Characters".camelCasedString   // "somewordWithCharacters"
+     ```
+     */
+    public var camelCased: String {
+        guard !isEmpty else { return self }
+        
+        if contains(" ") {
+            let first = self[0].lowercased()
+            let cammel = capitalized.replacingOccurrences(of: " ", with: "")
+            let rest = String(cammel.dropFirst())
+            return first + rest
+        } else {
+            let first = self[0].lowercased()
+            let rest = String(dropFirst())
+            return first + rest
+        }
+    }
+    
+    /**
+     The base64 encoded version of self.
+     Credit: http://stackoverflow.com/a/29365954
+     */
+    public var base64Encoded: String? {
+        let utf8str = data(using: .utf8)
+        return utf8str?.base64EncodedString()
+    }
+    
+    /**
+     The decoded value of a base64 encoded string
+     Credit: http://stackoverflow.com/a/29365954
+     */
+    public var base64Decoded: String? {
+        guard let data = Data(base64Encoded: self, options: []) else { return nil }
+        return String(data: data, encoding: .utf8)
+    }
+    
+    /**
+     Returns true if every character within the string is a numeric character. Empty strings are
+     considered non-numeric.
+    */
+    public var isNumeric: Bool {
+        guard !isEmpty else { return false }
+        return trimmingCharacters(in: .decimalDigits).isEmpty
+    }
+
+    /**
+     Replaces all occurences of the pattern on self in-place.
+
+     Examples:
+
+     ```
+     "hello".regexInPlace("[aeiou]", "*")      // "h*ll*"
+     "hello".regexInPlace("([aeiou])", "<$1>") // "h<e>ll<o>"
+     ```
+     */
+    public mutating func formRegex(_ pattern: String, _ replacement: String) {
+        do {
+            let expression = try NSRegularExpression(pattern: pattern, options: [])
+            let range = NSRange(location: 0, length: count)
+            self = expression.stringByReplacingMatches(in: self, options: [], range: range, withTemplate: replacement)
+        }
+        catch { return }
+    }
+    
+    /**
+     Returns a string containing replacements for all pattern matches.
+     
+     Examples:
+     
+     ```
+     "hello".regex("[aeiou]", "*")      // "h*ll*"
+     "hello".regex("([aeiou])", "<$1>") // "h<e>ll<o>"
+     ```
+     */
+    public func regex(_ pattern: String, _ replacement: String) -> String {
+        var replacementString = self
+        replacementString.formRegex(pattern, replacement)
+        return replacementString
+    }
+
+    /**
+     Replaces pattern-matched strings, operated upon by a closure, on self in-place.
+
+     - parameter pattern: The pattern to match against.
+     - parameter matches: The closure in which to handle matched strings.
+     
+     Example:
+
+     ```
+     "hello".regexInPlace(".") {
+        let s = $0.unicodeScalars
+        let v = s[s.startIndex].value
+        return "\(v) "
+     }   // "104 101 108 108 111 "
+     */
+    public mutating func formRegex(_ pattern: String, _ matches: (String) -> String) {
+
+        let expression: NSRegularExpression
+        do {
+            expression = try NSRegularExpression(pattern: "(\(pattern))", options: [])
+        }
+        catch {
+            print("regex error: \(error)")
+            return
+        }
+
+        let range = NSMakeRange(0, self.count)
+
+        var startOffset = 0
+
+        let results = expression.matches(in: self, options: [], range: range)
+
+        for result in results {
+
+            var endOffset = startOffset
+
+            for i in 1..<result.numberOfRanges {
+                var resultRange = result.range
+                resultRange.location += startOffset
+
+                let startIndex = self.index(self.startIndex, offsetBy: resultRange.location)
+                let endIndex = self.index(self.startIndex, offsetBy: resultRange.location + resultRange.length)
+                let replacementRange = startIndex ..< endIndex
+                
+                let match = expression.replacementString(for: result, in: self, offset: startOffset, template: "$\(i)")
+                let replacement = matches(match)
+
+                self.replaceSubrange(replacementRange, with: replacement)
+
+                endOffset += replacement.count - resultRange.length
+            }
+
+            startOffset = endOffset
+        }
+    }
+    
+    /**
+     Returns a string with pattern-matched strings, operated upon by a closure.
+     
+     - parameter pattern: The pattern to match against.
+     - parameter matches: The closure in which to handle matched strings.
+     
+     - returns: String containing replacements for the matched pattern.
+     
+     Example:
+     
+     ```
+     "hello".regex(".") {
+        let s = $0.unicodeScalars
+        let v = s[s.startIndex].value
+        return "\(v) "
+     }   // "104 101 108 108 111 "
+     */
+    public func regex(_ pattern: String, _ matches: (String) -> String) -> String {
+        var replacementString = self
+        replacementString.formRegex(pattern, matches)
+        return replacementString
+    }
+
+    /// Substring at index
+    public subscript(i: Int) -> String {
+        let index = safeIndex(offset: i)
+        let contains = index.flatMap(indices.contains) ?? false
+        
+        return contains ? String(self[index!]) : ""
+    }
+    
+    /// Substring for range
+    public subscript(r: Range<Int>) -> String {
+        return self[r.lowerBound ... (r.upperBound - 1)]
+    }
+    
+    /// Substring for closed range
+    public subscript(r: ClosedRange<Int>) -> String {
+        let startIndex = safeIndex(offset: r.lowerBound)
+        let endIndex = safeIndex(offset: r.upperBound)
+        
+        let containsStart = startIndex.flatMap(indices.contains) ?? false
+        let containsEnd = endIndex.flatMap(indices.contains) ?? false
+        
+        switch (containsStart, containsEnd) {
+        case (true, true):   return String(self[startIndex! ... endIndex!])
+        case (true, false):  return String(self[startIndex!...])
+        case (false, true):  return String(self[...endIndex!])
+        case (false, false): return ""
+        }
+    }
+    
+    /// Substring for countable partial range
+    public subscript(r: CountablePartialRangeFrom<Int>) -> String {
+        let index = safeIndex(offset: r.lowerBound)
+        let contains = index.flatMap(indices.contains) ?? false
+        
+        return contains ? String(self[index!...]) : ""
+    }
+    
+    /// Substring for partial range through upper bound
+    public subscript(r: PartialRangeThrough<Int>) -> String {
+        let index = safeIndex(offset: r.upperBound)
+        let contains = index.flatMap(indices.contains) ?? false
+        
+        return contains ? String(self[...index!]) : ""
+    }
+    
+    /// Substring for partial range up to upper bound
+    public subscript(r: PartialRangeUpTo<Int>) -> String {
+        let index = safeIndex(offset: r.upperBound)
+        let contains = index.flatMap(indices.contains) ?? false
+        
+        return contains ? String(self[..<index!]) : ""
+    }
+    
+    /**
+     Truncates the string to length characters, optionally appending a trailing string. If the string is shorter
+     than the required length, then this function is a non-op.
+    
+    - parameter length:   The length of string required.
+    - parameter trailing: An optional addition to the end of the string (increasing "length"), such as ellipsis.
+    
+    - returns: The truncated string.
+    
+    Examples:
+    
+    ```
+    "hello there".truncated(to: 5)                   // "hello"
+    "hello there".truncated(to: 5, trailing: "...")  // "hello..."
+    ```
+
+    */
+    public func truncated(to length: Int, trailing: String = "") -> String {
+        guard !isEmpty && count > length else { return self }
+        return self[..<length] + trailing
+    }
+    
+    public mutating func truncate(to length: Int, trailing: String = "") {
+        self = truncated(to: length, trailing: trailing)
+    }
+    
+    /**
+     A bridge for invoking `String.localizedStandardContainsString()`, which is available in iOS 9 and later. If you need to
+     support iOS versions prior to iOS 9, use `compatibleStandardContainsString()` as a means to bridge functionality.
+     If you can support iOS 9 or greater only, use `localizedStandardContainsString()` directly.
+     
+     From Apple's Swift 2.1 documentation:
+     
+     `localizedStandardContainsString()` is the most appropriate method for doing user-level string searches, similar to how searches are done generally in the system. The search is locale-aware, case and diacritic insensitive. The exact list of search options applied may change over time.
+     
+     - parameter string: The string to determine if is contained by self.
+     
+     - returns: Returns true if self contains string, taking the current locale into account.
+     */
+    public func compatibleStandardContains(_ string: String) -> Bool {
+        if #available(iOS 9.0, *) {
+            return localizedStandardContains(string)
+        }
+        return range(of: string, options: [.caseInsensitive, .diacriticInsensitive], locale: .current) != nil
+    }
+    
+    /**
+     Convert an NSRange to a Range. There is still a mismatch between the regular expression libraries
+     and NSString/String. This makes it easier to convert between the two. Using this allows complex
+     strings (including emoji, regonial indicattors, etc.) to be manipulated without having to resort
+     to NSString instances.
+     
+     Note that it may not always be possible to convert from an NSRange as they are not exactly the same.
+     
+     Taken from:
+     http://stackoverflow.com/questions/25138339/nsrange-to-rangestring-index
+     
+     - parameter nsRange: The NSRange instance to covert to a Range.
+     
+     - returns: The Range, if it was possible to convert. Otherwise nil.
+     */
+    public func range(from nsRange: NSRange) -> Range<String.Index>? {
+        return Range(nsRange, in: self)
+    }
+    
+    /**
+     Convert a Range to an NSRange. There is still a mismatch between the regular expression libraries
+     and NSString/String. This makes it easier to convert between the two. Using this allows complex
+     strings (including emoji, regonial indicators, etc.) to be manipulated without having to resort
+     to NSString instances.
+     
+     Taken from:
+     http://stackoverflow.com/questions/25138339/nsrange-to-rangestring-index
+     
+     - parameter range: The Range instance to conver to an NSRange.
+     
+     - returns: The NSRange converted from the input. This will always succeed.
+     */
+    public func nsRange(from range: Range<String.Index>) -> NSRange {
+        return NSRange(range, in: self)
+    }
+
+}
+
+private extension String {
+    
+    func safeIndex(offset: Int) -> String.Index? {
+        return index(startIndex, offsetBy: offset.limited(0, .max), limitedBy: endIndex)
+    }
+    
+}
@@ -0,0 +1,460 @@
+import Foundation
+import UIKit
+
+extension UIColor {
+    
+    /**
+     Returns a UIColor from the given hexidecimal integer.
+     - parameter hex: The hex component of the color object, specified as a value from 0x000000 to 0xFFFFFF.
+     - parameter alpha: The opacity component of the color object, specified as a value from 0.0 to 1.0 (optional).
+     - returns: A UIColor initialized with the given color value.
+     */
+    public convenience init(hex: UInt32, alpha: CGFloat = 1) {
+        assert((0...0xFFFFFF).contains(hex), "hex must be a value between 0x000000 and 0xFFFFFF")
+        assert((0...1).contains(alpha), "alpha must be a value between 0.0 and 1.0")
+        
+        let (r, g, b) = Model.hex(hex).rgb
+        self.init(red: r/255, green: g/255, blue: b/255, alpha: alpha)
+    }
+    
+    /**
+     Returns a UIColor from a hue-saturation-lightness (HSL) set.
+     - parameter hue: The hue component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter saturation: The saturation component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter lightness: The lightness component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter alpha: The opacity component of the color object, specified as a value from 0.0 to 1.0 (optional).
+     - returns: A UIColor initialized with the given color value.
+     */
+    public convenience init(hue: CGFloat, saturation: CGFloat, lightness: CGFloat, alpha: CGFloat = 1) {
+        assert((0...1).contains(hue), "hue value must be a value between 0.0 and 1.0")
+        assert((0...1).contains(saturation), "saturation must be a value between 0.0 and 1.0")
+        assert((0...1).contains(lightness), "lightness must be a value between 0.0 and 1.0")
+        assert((0...1).contains(alpha), "alpha must be a value between 0.0 and 1.0")
+        
+        let (r, g, b) = Model.hsl(hue, saturation, lightness).rgb
+        self.init(red: r/255, green: g/255, blue: b/255, alpha: alpha)
+    }
+    
+    /**
+     Returns a UIColor from a cyan-magenta-yellow-key (CMYK) set.
+     - parameter cyan: The cyan component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter magenta: The magenta component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter yellow: The yellow component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter key: The key (black) component of the color object, specified as a value from 0.0 to 1.0.
+     - parameter alpha: The opacity component of the color object, specified as a value from 0.0 to 1.0 (optional).
+     - returns: A UIColor initialized with the given color value.
+     */
+    public convenience init(cyan: CGFloat, magenta: CGFloat, yellow: CGFloat, key: CGFloat, alpha: CGFloat = 1) {
+        assert((0...1).contains(cyan), "cyan value must be a value between 0.0 and 1.0")
+        assert((0...1).contains(magenta), "magenta must be a value between 0.0 and 1.0")
+        assert((0...1).contains(yellow), "yellow must be a value between 0.0 and 1.0")
+        assert((0...1).contains(key), "key must be a value between 0.0 and 1.0")
+        assert((0...1).contains(alpha), "alpha must be a value between 0.0 and 1.0")
+        
+        let (r, g, b) = Model.cmyk(cyan, magenta, yellow, key).rgb
+        self.init(red: r/255, green: g/255, blue: b/255, alpha: alpha)
+    }
+    
+    /**
+     Returns a UIColor from a given hex color string.
+     - parameter hexString: The hex color string, e.g.: "#9443FB" or "9443FB".
+     - returns: A UIColor initialized with the color specified by the hexString.
+     */
+    public convenience init(hexString: String, alpha: CGFloat = 1) {
+        var hexString = hexString
+        if hexString.hasPrefix("#") {
+            hexString = hexString[1...]
+        }
+        let scanner = Scanner(string: hexString)
+        var hexEquivalent: UInt32 = 0
+        
+        if !scanner.scanHexInt32(&hexEquivalent) {
+            assertionFailure("hexString did not contain a valid hex value")
+        }
+        
+        self.init(hex: hexEquivalent, alpha: alpha)
+    }
+    
+    /**
+     Returns a UIColor initialized with color components divided by 255.0.
+     - parameter red: Integer representation of the red component in range of 0-255.
+     - parameter green: Integer representation of the green component in range of 0-255.
+     - parameter blue: Integer representation of the blue component in range of 0-255.
+    */
+    public convenience init(red: UInt8, green: UInt8, blue: UInt8) {
+        self.init(red: CGFloat(red)/255.0, green: CGFloat(green)/255.0, blue: CGFloat(blue)/255.0, alpha: 1.0)
+    }
+    
+    /// Returns a random UIColor with hue, saturation, and brightness ranging from 0.5 to 1.0.
+    public static var random: UIColor {
+        let component = { CGFloat(arc4random() % 128)/256.0 + 0.5 }
+        return UIColor(hue: component(), saturation: component(), brightness: component(), alpha: 1)
+    }
+    
+    /**
+     Lightens the given color by the given percentage.
+     - parameter amount: The percentage by which to lighten the color. Valid values are from `0.0` to `1.0`, or for a more readable format `0%` to `100%`.
+     - returns: The lightened color.
+     */
+    public final func lightened(by amount: CGFloat) -> UIColor {
+        assert((0...1).contains(amount), "amount must be in range 0-100%")
+        
+        let (h, s, l) = hsl
+        return UIColor(hue: h, saturation: s, lightness: l * (1 + amount), alpha: rgba.a)
+    }
+    
+    /**
+     Darkens the given color by the given percentage.
+     - parameter amount: The percentage by which to darken the color. Valid values are from `0.0` to `1.0`, or for a more readable format `0%` to `100%`.
+     - returns: The darkened color.
+     */
+    public final func darkened(by amount: CGFloat) -> UIColor {
+        assert((0...1).contains(amount), "amount must be in range 0-100%")
+        
+        let (h, s, l) = hsl
+        return UIColor(hue: h, saturation: s, lightness: l * (1 - amount), alpha: rgba.a)
+    }
+    
+    /**
+     Returns the color represenation as a hexadecimal string, prefixed with '#'.
+     - returns: The hexadecimal string representation of the color.
+     */
+    public final var hexString: String {
+        return String(format:"#%06x", hex)
+    }
+    
+    /**
+     Returns the color representation as a 32-bit integer.
+     - returns: A UInt32 that represents the hexadecimal color.
+     */
+    public final var hex: UInt32 {
+        let (r, g, b, _) = self.rgba
+        return Model.rgb(r * 255, g * 255, b * 255).hex
+    }
+    
+    /**
+     Returns the RGBA (red, green, blue, alpha) components, specified as values from 0.0 to 1.0.
+     - returns: The RGBA components as a tuple (r, g, b, a).
+     */
+    public final var rgba: (r: CGFloat, g: CGFloat, b: CGFloat, a: CGFloat) {
+        var (r, g, b, a): (CGFloat, CGFloat, CGFloat, CGFloat) = (0, 0, 0, 0)
+        getRed(&r, green: &g, blue: &b, alpha: &a)
+            
+        return (r, g, b, a)
+    }
+    
+    /**
+     Returns the HSL (hue, saturation, lightness) components, specified as values from 0.0 to 1.0.
+     - returns: The HSL components as a tuple (h, s, l).
+     */
+    public final var hsl: (h: CGFloat, s: CGFloat, l: CGFloat) {
+        let (r, g, b, _) = rgba
+        return Model.rgb(r * 255, g * 255, b * 255).hsl
+    }
+    
+    /**
+     Returns the HSB (hue, saturation, brightness) components, specified as values from 0.0 to 1.0.
+     - returns: The HSB components as a tuple (h, s, b).
+     */
+    public final var hsb: (h: CGFloat, s: CGFloat, b: CGFloat) {
+        let (r, g, b, _) = rgba
+        return Model.rgb(r * 255, g * 255, b * 255).hsb
+    }
+    
+    /**
+     Returns the CMYK (cyan, magenta, yellow, key) components, specified as values from 0.0 to 1.0.
+     - returns: The CMYK components as a tuple (c, m, y, k).
+     */
+    public final var cmyk: (c: CGFloat, m: CGFloat, y: CGFloat, k: CGFloat) {
+        let (r, g, b, _) = rgba
+        return Model.rgb(r * 255, g * 255, b * 255).cmyk
+    }
+    
+    /**
+     Returns an alpha-adjusted UIColor.
+     - returns: A UIColor with an adjust alpha component (shorthand for `colorWithAlphaComponent`).
+     */
+    public final func alpha(_ alpha: CGFloat) -> UIColor {
+        return withAlphaComponent(alpha)
+    }
+    
+    /**
+     Returns a UIColor from the given hexidecimal integer.
+     - parameter hex: The color value.
+     - parameter alpha: The alpha component.
+     - returns: A UIColor initialized with the given hex value.
+     */
+    public static func hex(_ hex: UInt32, alpha: CGFloat = 1) -> UIColor {
+        return UIColor(hex: hex, alpha: alpha)
+    }
+    
+    /**
+     Returns a UIColor from the given RGB components.
+     - parameter red: The red component in range of 0-255.
+     - parameter green: The green component in range of 0-255.
+     - parameter blue: The blue component in range of 0-255.
+     - parameter alpha: The alpha component.
+     - returns: A UIColor initialized with the given RGB components.
+     */
+    public static func rgb(_ red: UInt8, _ green: UInt8, _ blue: UInt8, alpha: CGFloat = 1) -> UIColor {
+        return UIColor(red: red, green: green, blue: blue).alpha(alpha)
+    }
+}
+
+// MARK: - Model
+
+extension UIColor {
+
+    /**
+     Model is an enum for describing and converting color models.
+     
+     - `rgb`: Red, Green, Blue color representation
+     - `hsl`: Hue, Saturation, Lightness color representation
+     - `hsb`: Hue, Saturation, Brightness color representation
+     - `cmyk`: Cyan, Magenta, Yellow, Key (Black) color representation
+     - `hex`: UInt32 (hex) color representation
+     */
+    public enum Model {
+        /// Red, Green, Blue
+        case rgb(CGFloat, CGFloat, CGFloat)
+        /// Hue, Saturation, Lightness
+        case hsl(CGFloat, CGFloat, CGFloat)
+        /// Hue, Saturation, Brightness
+        case hsb(CGFloat, CGFloat, CGFloat)
+        /// Cyan, Magenta, Yellow, Key (Black)
+        case cmyk(CGFloat, CGFloat, CGFloat, CGFloat)
+        /// UInt32 (hex)
+        case hex(UInt32)
+        
+        /// Returns the model as an RGB tuple
+        public var rgb: (r: CGFloat, g: CGFloat, b: CGFloat) {
+            switch self {
+            case .rgb(let rgb):
+                return rgb
+            case .hsl(let h, let s, let l):
+                return convert(hsl: h, s, l)
+            case .hsb(let h, let s, let b):
+                return convert(hsb: h, s, b)
+            case .cmyk(let c, let m, let y, let k):
+                return convert(cmyk: c, m, y, k)
+            case .hex(let hex):
+                return convert(hex: hex)
+            }
+        }
+        
+        /// Returns the model as an HSL tuple
+        public var hsl: (h: CGFloat, s: CGFloat, l: CGFloat) {
+            switch self {
+            case .rgb(let r, let g, let b):
+                return convert(rgb: r, g, b)
+            case .hsl(let hsl):
+                return hsl
+            case .hsb, .cmyk, .hex:
+                let (r, g, b) = self.rgb
+                return convert(rgb: r, g, b)
+            }
+        }
+        
+        /// Returns the model as an HSB tuple
+        public var hsb: (h: CGFloat, s: CGFloat, b: CGFloat) {
+            switch self {
+            case .rgb(let r, let g, let b):
+                return convert(rgb: r, g, b)
+            case .hsl, .cmyk, .hex:
+                let (r, g, b) = self.rgb
+                return convert(rgb: r, g, b)
+            case .hsb(let hsb):
+                return hsb
+            }
+        }
+        
+        /// Returns the model as a CMYK tuple
+        public var cmyk: (c: CGFloat, m: CGFloat, y: CGFloat, k: CGFloat) {
+            switch self {
+            case .rgb(let r, let g, let b):
+                return convert(rgb: r, g, b)
+            case .hsl, .hsb, .hex:
+                let (r, g, b) = self.rgb
+                return convert(rgb: r, g, b)
+            case .cmyk(let cmyk):
+                return cmyk
+            }
+        }
+        
+        /// Returns the model as a UInt32 (hex) value
+        public var hex: UInt32 {
+            switch self {
+            case .rgb(let r, let g, let b):
+                return convert(rgb: r, g, b)
+            case .hsl, .hsb, .cmyk:
+                let (r, g, b) = self.rgb
+                return convert(rgb: r, g, b)
+            case .hex(let hex):
+                return hex
+            }
+        }
+    }
+}
+    
+// MARK: - Private color model conversions
+
+/// Converts RGB to HSL (https://en.wikipedia.org/wiki/HSL_and_HSV)
+private func convert(rgb r: CGFloat, _ g: CGFloat, _ b: CGFloat) -> (h: CGFloat, s: CGFloat, l: CGFloat) {
+    
+    let r = r / 255
+    let g = g / 255
+    let b = b / 255
+    
+    let max = Swift.max(r, g, b)
+    let min = Swift.min(r, g, b)
+    
+    var h, s: CGFloat
+    let l = (max + min) / 2
+    
+    if max == min {
+        h = 0
+        s = 0
+    }
+    else {
+        let d = max - min
+        s = (l > 0.5) ? d / (2 - max - min) : d / (max + min)
+        
+        switch max {
+        case r:  h = (g - b) / d + (g < b ? 6 : 0)
+        case g:  h = (b - r) / d + 2
+        case b:  h = (r - g) / d + 4
+        default: h = 0
+        }
+        
+        h /= 6;
+    }
+    
+    return (h, s, l)
+}
+
+/// Converts HSL to RGB (https://en.wikipedia.org/wiki/HSL_and_HSV)
+private func convert(hsl h: CGFloat, _ s: CGFloat, _ l: CGFloat) -> (r: CGFloat, g: CGFloat, b: CGFloat) {
+    
+    let r, g, b: CGFloat
+    
+    if s == 0 {
+        r = l
+        g = l
+        b = l
+    }
+    else {
+        let c = (1 - abs(2 * l - 1)) * s
+        let x = c * (1 - abs((h * 6).truncatingRemainder(dividingBy: 2) - 1))
+        let m = l - c/2
+        
+        switch h * 6 {
+        case 0..<1: (r, g, b) = (c, x, 0) + m
+        case 1..<2: (r, g, b) = (x, c, 0) + m
+        case 2..<3: (r, g, b) = (0, c, x) + m
+        case 3..<4: (r, g, b) = (0, x, c) + m
+        case 4..<5: (r, g, b) = (x, 0, c) + m
+        case 5..<6: (r, g, b) = (c, 0, x) + m
+        default:    (r, g, b) = (0, 0, 0) + m
+        }
+    }
+    
+    return (round(r * 255), round(g * 255), round(b * 255))
+}
+
+/// Converts RGB to HSB (https://en.wikipedia.org/wiki/HSL_and_HSV)
+private func convert(rgb r: CGFloat, _ g: CGFloat, _ b: CGFloat) -> (h: CGFloat, s: CGFloat, b: CGFloat) {
+    var h, s, v: CGFloat
+    
+    let r = r / 255
+    let g = g / 255
+    let b = b / 255
+    
+    let max = Swift.max(r, g, b)
+    let min = Swift.min(r, g, b)
+    let d = max - min
+    
+    if d == 0 {
+        h = 0
+        s = 0
+    }
+    else {
+        s = (max == 0) ? 0 : d / max
+        
+        switch max {
+        case r:  h = ((g - b) / d) + (g < b ? 6 : 0)
+        case g:  h = ((b - r) / d) + 2
+        case b:  h = ((r - g) / d) + 4
+        default: h = 0
+        }
+        
+        h /= 6;
+    }
+    
+    v = max
+    
+    return (h, s, v)
+}
+
+/// Converts HSB to RGB (https://en.wikipedia.org/wiki/HSL_and_HSV)
+private func convert(hsb h: CGFloat, _ s: CGFloat, _ b: CGFloat) -> (r: CGFloat, g: CGFloat, b: CGFloat) {
+    
+    let c = b * s
+    let x = c * (1 - abs((h * 6).truncatingRemainder(dividingBy: 2) - 1))
+    let m = b - c
+    
+    var r, g, b: CGFloat
+    
+    switch h * 6 {
+    case 0..<1: (r, g, b) = (c, x, 0) + m
+    case 1..<2: (r, g, b) = (x, c, 0) + m
+    case 2..<3: (r, g, b) = (0, c, x) + m
+    case 3..<4: (r, g, b) = (0, x, c) + m
+    case 4..<5: (r, g, b) = (x, 0, c) + m
+    case 5..<6: (r, g, b) = (c, 0, x) + m
+    default:    (r, g, b) = (0, 0, 0) + m
+    }
+    
+    return (round(r * 255), round(g * 255), round(b * 255))
+}
+
+/// Converts UInt32 to RGB
+private func convert(hex: UInt32) -> (r: CGFloat, g: CGFloat, b: CGFloat) {
+    let r = CGFloat((hex >> 16) & 0xFF)
+    let g = CGFloat((hex >> 8) & 0xFF)
+    let b = CGFloat(hex & 0xFF)
+    
+    return (r, g, b)
+}
+
+/// Converts RGB to UInt32
+private func convert(rgb r: CGFloat, _ g: CGFloat, _ b: CGFloat) -> UInt32 {
+    return (UInt32(r) << 16) | (UInt32(g) << 8) | UInt32(b)
+}
+
+/// Converts RGB to CMYK (http://www.rapidtables.com/convert/color/rgb-to-cmyk.htm)
+private func convert(rgb r: CGFloat, _ g: CGFloat, _ b: CGFloat) -> (c: CGFloat, m: CGFloat, y: CGFloat, k: CGFloat) {
+    let r = r / 255
+    let g = g / 255
+    let b = b / 255
+    
+    let k = 1 - max(r, g, b)
+    let c = (k == 1) ? 0 : (1 - r - k) / (1 - k)
+    let m = (k == 1) ? 0 : (1 - g - k) / (1 - k)
+    let y = (k == 1) ? 0 : (1 - b - k) / (1 - k)
+    
+    return (c, m, y, k)
+}
+
+/// Converts CMYK to RGB (http://www.rapidtables.com/convert/color/cmyk-to-rgb.htm)
+private func convert(cmyk c: CGFloat, _ m: CGFloat, _ y: CGFloat, _ k: CGFloat) -> (r: CGFloat, g: CGFloat, b: CGFloat) {
+    let r = 255 * (1 - c) * (1 - k)
+    let g = 255 * (1 - m) * (1 - k)
+    let b = 255 * (1 - y) * (1 - k)
+    
+    return (round(r), round(g), round(b))
+}
+
+/// Private operator for HSL and HSB conversion
+private func +(lhs: (CGFloat, CGFloat, CGFloat), rhs: CGFloat) -> (CGFloat, CGFloat, CGFloat) {
+    return (lhs.0 + rhs, lhs.1 + rhs, lhs.2 + rhs)
+}
@@ -1,14 +0,0 @@
-import Foundation
-import UIKit
-
-extension UIColor {
-  
-  /// Returns a random UIColor
-  public static var random: UIColor {
-    let hue : CGFloat = CGFloat(arc4random() % 256) / 256 // use 256 to get full range from 0.0 to 1.0
-    let saturation : CGFloat = CGFloat(arc4random() % 128) / 256 + 0.5 // from 0.5 to 1.0 to stay away from white
-    let brightness : CGFloat = CGFloat(arc4random() % 128) / 256 + 0.5 // from 0.5 to 1.0 to stay away from black
-    
-    return UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: 1)
-  }
-}
Author	SHA1	Message	Date
igork-ramotion	54dbcc8c2e	Merge pull request #5 from MikhailZimin/fix-isNilOrEmpty-availability fixed isNilOrEmpty availability.	2020-02-24 00:54:44 +03:00
Mikhail Zimin	6c92596228	fixed isNilOrEmpty availability.	2020-02-19 11:58:40 +07:00
igor.k	9b222b328e	swift 5 changes	2020-01-11 16:23:08 +03:00
igor.k	64d0f96f83	lerp UIColor & CGRect	2019-12-04 17:10:13 +03:00
Alex K	7556ac505e	bump version	2019-04-15 12:12:35 +03:00
Alex K	96abfee256	converted to swift 5	2019-04-15 11:28:19 +03:00
i.kolpachkov	86a06411d7	[Toggler control]: small improvements	2018-12-10 01:38:34 +03:00
i.kolpachkov	8031f5a28f	add collection layouts, string & color extensions	2018-11-26 23:26:16 +03:00
i.kolpachkov	fdd2ed5b7c	small improvement	2018-11-23 17:25:56 +03:00
i.kolpachkov	5cabfab574	UIColor extensions	2018-11-23 02:16:09 +03:00
i.kolpachkov	535b76fea0	Merge branch 'master' of https://github.com/Ramotion/utopia	2018-11-21 22:27:13 +03:00
i.kolpachkov	5b0672ee60	Core Graphics extensions	2018-11-21 22:26:59 +03:00