Merge branch 'release/0.3.0'

Tests are adapted from the official suite:
http://www.w3.org/Style/CSS/Test/CSS3/Selectors/current/html/static/flat/

Test file format:
Each test file is a HTML fragment with:

<script> element with id="selectors": contains a JSON array of several selector
definitions. Each selector definition has a selector string as input, a "match" array
of the expected matched IDs. Some selectors must fail with a parse error, such
selectors have an "error" key with the error location in the selector string.

<div> element with id="testDOM": contains the DOM fragment which should be
used to select the elements for each of the defined selectors.

.gitignore

@@ -1,8 +1,12 @@
-# OS X
-.DS_Store
-
 # Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## Build generated
 build/
+DerivedData
+
+## Various settings
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -12,13 +16,28 @@ build/
 *.perspectivev3
 !default.perspectivev3
 xcuserdata
+
+## Other
 *.xccheckout
-profile
 *.moved-aside
-DerivedData
+*.xcuserstate
+*.xcscmblueprint
+
+## Obj-C/Swift specific
 *.hmap
 *.ipa
 
 # CocoaPods
-Pods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# http://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+Pods/
 
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+Carthage/Checkouts
+
+Carthage/Build

HTMLKit.xcodeproj/project.pbxproj

@@ -7,49 +7,51 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		623406E11ADB04F9004677A3 /* HTMLTemplate.h in Headers */ = {isa = PBXBuildFile; fileRef = 623406DF1ADB04F9004677A3 /* HTMLTemplate.h */; };
+		620C877C1BD44CBE00FB3EEE /* CSSCompoundSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 620C877A1BD44CBE00FB3EEE /* CSSCompoundSelector.m */; };
+		620C877D1BD44CBE00FB3EEE /* CSSCompoundSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 620C877A1BD44CBE00FB3EEE /* CSSCompoundSelector.m */; };
+		620C877E1BD4519A00FB3EEE /* CSSPseudoFunctionSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 62ACB8DC1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.m */; };
+		620C877F1BD4519A00FB3EEE /* CSSPseudoFunctionSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 62ACB8DC1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.m */; };
+		620EE94A1BC46F2A0028ED34 /* CSSPseudoClassSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 620EE9481BC46F2A0028ED34 /* CSSPseudoClassSelector.m */; };
+		620EE94B1BC46F2A0028ED34 /* CSSPseudoClassSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 620EE9481BC46F2A0028ED34 /* CSSPseudoClassSelector.m */; };
+		62132E591C01F83200084175 /* CSSSelectorTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 62132E581C01F83200084175 /* CSSSelectorTest.m */; };
+		62132E5A1C01F83200084175 /* CSSSelectorTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 62132E581C01F83200084175 /* CSSSelectorTest.m */; };
+		62132E5C1C021FF200084175 /* css-tests in Resources */ = {isa = PBXBuildFile; fileRef = 62132E5B1C021FF200084175 /* css-tests */; };
+		62132E5D1C021FF200084175 /* css-tests in Resources */ = {isa = PBXBuildFile; fileRef = 62132E5B1C021FF200084175 /* css-tests */; };
+		621FBE5A1BDAD68700BC9555 /* CSSSelectorParserTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 621FBE591BDAD68700BC9555 /* CSSSelectorParserTests.m */; };
+		621FBE5B1BDAD68700BC9555 /* CSSSelectorParserTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 621FBE591BDAD68700BC9555 /* CSSSelectorParserTests.m */; };
+		621FBE5D1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 621FBE5C1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m */; };
+		621FBE5E1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 621FBE5C1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m */; };
+		622BF5821BBF2FD700363583 /* CSSSelectorParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 622BF5801BBF2FD700363583 /* CSSSelectorParser.m */; };
+		622BF5831BBF2FD700363583 /* CSSSelectorParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 622BF5801BBF2FD700363583 /* CSSSelectorParser.m */; };
 		623406E21ADB04F9004677A3 /* HTMLTemplate.m in Sources */ = {isa = PBXBuildFile; fileRef = 623406E01ADB04F9004677A3 /* HTMLTemplate.m */; };
 		623406E31ADB04F9004677A3 /* HTMLTemplate.m in Sources */ = {isa = PBXBuildFile; fileRef = 623406E01ADB04F9004677A3 /* HTMLTemplate.m */; };
-		623406E61ADB05AD004677A3 /* HTMLDocumentFragment.h in Headers */ = {isa = PBXBuildFile; fileRef = 623406E41ADB05AD004677A3 /* HTMLDocumentFragment.h */; };
 		623406E71ADB05AD004677A3 /* HTMLDocumentFragment.m in Sources */ = {isa = PBXBuildFile; fileRef = 623406E51ADB05AD004677A3 /* HTMLDocumentFragment.m */; };
 		623406E81ADB05AD004677A3 /* HTMLDocumentFragment.m in Sources */ = {isa = PBXBuildFile; fileRef = 623406E51ADB05AD004677A3 /* HTMLDocumentFragment.m */; };
-		623424881AB467B200726190 /* HTMLOrderedDictionary.h in Headers */ = {isa = PBXBuildFile; fileRef = 623424861AB467B200726190 /* HTMLOrderedDictionary.h */; };
 		623424891AB467B200726190 /* HTMLOrderedDictionary.m in Sources */ = {isa = PBXBuildFile; fileRef = 623424871AB467B200726190 /* HTMLOrderedDictionary.m */; };
 		6234248A1AB467B200726190 /* HTMLOrderedDictionary.m in Sources */ = {isa = PBXBuildFile; fileRef = 623424871AB467B200726190 /* HTMLOrderedDictionary.m */; };
-		6234584E1A9D2FA4009BD491 /* HTMLNode.h in Headers */ = {isa = PBXBuildFile; fileRef = 6234584C1A9D2FA4009BD491 /* HTMLNode.h */; };
 		6234584F1A9D2FA4009BD491 /* HTMLNode.m in Sources */ = {isa = PBXBuildFile; fileRef = 6234584D1A9D2FA4009BD491 /* HTMLNode.m */; };
 		623458501A9D2FA4009BD491 /* HTMLNode.m in Sources */ = {isa = PBXBuildFile; fileRef = 6234584D1A9D2FA4009BD491 /* HTMLNode.m */; };
-		6234BEEE1AABBF1400DEB15F /* HTMLStackOfOpenElements.h in Headers */ = {isa = PBXBuildFile; fileRef = 6234BEEC1AABBF1400DEB15F /* HTMLStackOfOpenElements.h */; };
 		6234BEEF1AABBF1400DEB15F /* HTMLStackOfOpenElements.m in Sources */ = {isa = PBXBuildFile; fileRef = 6234BEED1AABBF1400DEB15F /* HTMLStackOfOpenElements.m */; };
 		6234BEF01AABBF1400DEB15F /* HTMLStackOfOpenElements.m in Sources */ = {isa = PBXBuildFile; fileRef = 6234BEED1AABBF1400DEB15F /* HTMLStackOfOpenElements.m */; };
 		6234CF571ABF892400B6077D /* libHTMLKit.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14DE19C7834000AD0C32 /* libHTMLKit.a */; };
-		6235CE9B1AA509430026937B /* NSString+HTMLKit.h in Headers */ = {isa = PBXBuildFile; fileRef = 6235CE991AA509430026937B /* NSString+HTMLKit.h */; };
 		6235CE9C1AA509430026937B /* NSString+HTMLKit.m in Sources */ = {isa = PBXBuildFile; fileRef = 6235CE9A1AA509430026937B /* NSString+HTMLKit.m */; };
 		6235CE9D1AA509430026937B /* NSString+HTMLKit.m in Sources */ = {isa = PBXBuildFile; fileRef = 6235CE9A1AA509430026937B /* NSString+HTMLKit.m */; };
-		6235CEA01AA5170A0026937B /* HTMLMarker.h in Headers */ = {isa = PBXBuildFile; fileRef = 6235CE9E1AA5170A0026937B /* HTMLMarker.h */; };
 		6235CEA11AA5170A0026937B /* HTMLMarker.m in Sources */ = {isa = PBXBuildFile; fileRef = 6235CE9F1AA5170A0026937B /* HTMLMarker.m */; };
 		6235CEA21AA5170A0026937B /* HTMLMarker.m in Sources */ = {isa = PBXBuildFile; fileRef = 6235CE9F1AA5170A0026937B /* HTMLMarker.m */; };
-		62362A3C1A9FA70400301989 /* HTMLText.h in Headers */ = {isa = PBXBuildFile; fileRef = 62362A3A1A9FA70400301989 /* HTMLText.h */; };
 		62362A3D1A9FA70400301989 /* HTMLText.m in Sources */ = {isa = PBXBuildFile; fileRef = 62362A3B1A9FA70400301989 /* HTMLText.m */; };
 		62362A3E1A9FA70400301989 /* HTMLText.m in Sources */ = {isa = PBXBuildFile; fileRef = 62362A3B1A9FA70400301989 /* HTMLText.m */; };
-		62363C3D1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.h in Headers */ = {isa = PBXBuildFile; fileRef = 62363C3B1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.h */; };
 		62363C3E1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.m in Sources */ = {isa = PBXBuildFile; fileRef = 62363C3C1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.m */; };
 		62363C3F1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.m in Sources */ = {isa = PBXBuildFile; fileRef = 62363C3C1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.m */; };
 		6236738E1AC0CE2500FF89B3 /* HTMLKitTokenizerPerformance.m in Sources */ = {isa = PBXBuildFile; fileRef = 6236738D1AC0CE2500FF89B3 /* HTMLKitTokenizerPerformance.m */; };
 		6236738F1AC0CE2500FF89B3 /* HTMLKitTokenizerPerformance.m in Sources */ = {isa = PBXBuildFile; fileRef = 6236738D1AC0CE2500FF89B3 /* HTMLKitTokenizerPerformance.m */; };
-		6238039F1AB63A8C008A53D0 /* HTMLEOFToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 6238039D1AB63A8C008A53D0 /* HTMLEOFToken.h */; };
 		623803A01AB63A8C008A53D0 /* HTMLEOFToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 6238039E1AB63A8C008A53D0 /* HTMLEOFToken.m */; };
 		623803A11AB63A8C008A53D0 /* HTMLEOFToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 6238039E1AB63A8C008A53D0 /* HTMLEOFToken.m */; };
-		623857911A9E772B003A45D9 /* HTMLDocument.h in Headers */ = {isa = PBXBuildFile; fileRef = 6238578F1A9E772B003A45D9 /* HTMLDocument.h */; };
 		623857921A9E772B003A45D9 /* HTMLDocument.m in Sources */ = {isa = PBXBuildFile; fileRef = 623857901A9E772B003A45D9 /* HTMLDocument.m */; };
 		623857931A9E772B003A45D9 /* HTMLDocument.m in Sources */ = {isa = PBXBuildFile; fileRef = 623857901A9E772B003A45D9 /* HTMLDocument.m */; };
-		623857961A9E8606003A45D9 /* HTMLDocumentType.h in Headers */ = {isa = PBXBuildFile; fileRef = 623857941A9E8606003A45D9 /* HTMLDocumentType.h */; };
 		623857971A9E8606003A45D9 /* HTMLDocumentType.m in Sources */ = {isa = PBXBuildFile; fileRef = 623857951A9E8606003A45D9 /* HTMLDocumentType.m */; };
 		623857981A9E8606003A45D9 /* HTMLDocumentType.m in Sources */ = {isa = PBXBuildFile; fileRef = 623857951A9E8606003A45D9 /* HTMLDocumentType.m */; };
-		6238579B1A9E8934003A45D9 /* HTMLComment.h in Headers */ = {isa = PBXBuildFile; fileRef = 623857991A9E8934003A45D9 /* HTMLComment.h */; };
 		6238579C1A9E8934003A45D9 /* HTMLComment.m in Sources */ = {isa = PBXBuildFile; fileRef = 6238579A1A9E8934003A45D9 /* HTMLComment.m */; };
 		6238579D1A9E8934003A45D9 /* HTMLComment.m in Sources */ = {isa = PBXBuildFile; fileRef = 6238579A1A9E8934003A45D9 /* HTMLComment.m */; };
-		6238C9851AB8D6330006512E /* HTMLKitDOMExceptions.h in Headers */ = {isa = PBXBuildFile; fileRef = 6238C9831AB8D6330006512E /* HTMLKitDOMExceptions.h */; };
 		6238C9861AB8D6330006512E /* HTMLKitDOMExceptions.m in Sources */ = {isa = PBXBuildFile; fileRef = 6238C9841AB8D6330006512E /* HTMLKitDOMExceptions.m */; };
 		6238C9871AB8D6330006512E /* HTMLKitDOMExceptions.m in Sources */ = {isa = PBXBuildFile; fileRef = 6238C9841AB8D6330006512E /* HTMLKitDOMExceptions.m */; };
 		623916C71AC7209E0066B4FE /* HTMLKitNodeIteratorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 623916C61AC7209E0066B4FE /* HTMLKitNodeIteratorTests.m */; };
@@ -60,33 +62,38 @@
 		6239755F1AC364BB007E26F1 /* HTML5LibTreeConstructionTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 6239755D1AC364BB007E26F1 /* HTML5LibTreeConstructionTest.m */; };
 		623CAF9D1AD88BEA00E34C32 /* HTMLKitParserPerformance.m in Sources */ = {isa = PBXBuildFile; fileRef = 623CAF9C1AD88BEA00E34C32 /* HTMLKitParserPerformance.m */; };
 		623CAF9E1AD88BEA00E34C32 /* HTMLKitParserPerformance.m in Sources */ = {isa = PBXBuildFile; fileRef = 623CAF9C1AD88BEA00E34C32 /* HTMLKitParserPerformance.m */; };
-		624493A619CCC54100BCDDF4 /* HTMLTokenizer.h in Headers */ = {isa = PBXBuildFile; fileRef = 624493A419CCC54100BCDDF4 /* HTMLTokenizer.h */; };
 		624493A719CCC54100BCDDF4 /* HTMLTokenizer.m in Sources */ = {isa = PBXBuildFile; fileRef = 624493A519CCC54100BCDDF4 /* HTMLTokenizer.m */; };
 		624493A819CCC54100BCDDF4 /* HTMLTokenizer.m in Sources */ = {isa = PBXBuildFile; fileRef = 624493A519CCC54100BCDDF4 /* HTMLTokenizer.m */; };
-		624493AC19CD0CBE00BCDDF4 /* HTMLToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 624493AA19CD0CBE00BCDDF4 /* HTMLToken.h */; };
 		624493AD19CD0CBE00BCDDF4 /* HTMLToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 624493AB19CD0CBE00BCDDF4 /* HTMLToken.m */; };
 		624493AE19CD0CBE00BCDDF4 /* HTMLToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 624493AB19CD0CBE00BCDDF4 /* HTMLToken.m */; };
-		624717181B22333200C11912 /* HTMLNodeTraversal.h in Headers */ = {isa = PBXBuildFile; fileRef = 624717161B22333200C11912 /* HTMLNodeTraversal.h */; };
 		624717191B22333200C11912 /* HTMLNodeTraversal.m in Sources */ = {isa = PBXBuildFile; fileRef = 624717171B22333200C11912 /* HTMLNodeTraversal.m */; };
 		6247171A1B22333200C11912 /* HTMLNodeTraversal.m in Sources */ = {isa = PBXBuildFile; fileRef = 624717171B22333200C11912 /* HTMLNodeTraversal.m */; };
 		6247171C1B2240B800C11912 /* HTMLTreeWalkerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6247171B1B2240B800C11912 /* HTMLTreeWalkerTests.m */; };
 		6247171D1B2240B800C11912 /* HTMLTreeWalkerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6247171B1B2240B800C11912 /* HTMLTreeWalkerTests.m */; };
 		624717B81B21FE5400B38302 /* HTMLNodeFilter.m in Sources */ = {isa = PBXBuildFile; fileRef = 624717B71B21FE5400B38302 /* HTMLNodeFilter.m */; };
 		624717B91B21FE5400B38302 /* HTMLNodeFilter.m in Sources */ = {isa = PBXBuildFile; fileRef = 624717B71B21FE5400B38302 /* HTMLNodeFilter.m */; };
-		624717BC1B22009200B38302 /* HTMLTreeWalker.h in Headers */ = {isa = PBXBuildFile; fileRef = 624717BA1B22009200B38302 /* HTMLTreeWalker.h */; };
 		624717BD1B22009200B38302 /* HTMLTreeWalker.m in Sources */ = {isa = PBXBuildFile; fileRef = 624717BB1B22009200B38302 /* HTMLTreeWalker.m */; };
 		624717BE1B22009200B38302 /* HTMLTreeWalker.m in Sources */ = {isa = PBXBuildFile; fileRef = 624717BB1B22009200B38302 /* HTMLTreeWalker.m */; };
-		6247A9431B152F4F00CCF25C /* HTMLNodeIterator.h in Headers */ = {isa = PBXBuildFile; fileRef = 6247A9411B152F4F00CCF25C /* HTMLNodeIterator.h */; };
 		6247A9441B152F4F00CCF25C /* HTMLNodeIterator.m in Sources */ = {isa = PBXBuildFile; fileRef = 6247A9421B152F4F00CCF25C /* HTMLNodeIterator.m */; };
 		6247A9451B152F4F00CCF25C /* HTMLNodeIterator.m in Sources */ = {isa = PBXBuildFile; fileRef = 6247A9421B152F4F00CCF25C /* HTMLNodeIterator.m */; };
-		6247A9471B152F8C00CCF25C /* HTMLNodeFilter.h in Headers */ = {isa = PBXBuildFile; fileRef = 6247A9461B152F8C00CCF25C /* HTMLNodeFilter.h */; };
-		624AC8FF19FBF59800BD3C4A /* HTMLTokens.h in Headers */ = {isa = PBXBuildFile; fileRef = 624AC8FE19FBF4F700BD3C4A /* HTMLTokens.h */; };
+		624AB3171B0508AE00F3830D /* CSSTypeSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624AB3161B0508AE00F3830D /* CSSTypeSelectorTests.m */; };
+		624AB3181B0508AE00F3830D /* CSSTypeSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624AB3161B0508AE00F3830D /* CSSTypeSelectorTests.m */; };
+		624AB31A1B050A4D00F3830D /* CSSAttributeSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624AB3191B050A4D00F3830D /* CSSAttributeSelectorTests.m */; };
+		624AB31B1B050A4D00F3830D /* CSSAttributeSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624AB3191B050A4D00F3830D /* CSSAttributeSelectorTests.m */; };
 		624AC90119FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624AC90019FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m */; };
 		624AC90219FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624AC90019FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m */; };
 		624AC90519FBFE9A00BD3C4A /* html5lib-tests in Resources */ = {isa = PBXBuildFile; fileRef = 624AC90419FBFE8A00BD3C4A /* html5lib-tests */; };
 		624AC90619FBFEA000BD3C4A /* html5lib-tests in Resources */ = {isa = PBXBuildFile; fileRef = 624AC90419FBFE8A00BD3C4A /* html5lib-tests */; };
 		624AC90E19FC702E00BD3C4A /* HTML Standard.html in Resources */ = {isa = PBXBuildFile; fileRef = 624AC90D19FC702E00BD3C4A /* HTML Standard.html */; };
 		624AC90F19FC702E00BD3C4A /* HTML Standard.html in Resources */ = {isa = PBXBuildFile; fileRef = 624AC90D19FC702E00BD3C4A /* HTML Standard.html */; };
+		624B28B91B03DA820048D328 /* CSSTypeSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B28B71B03DA820048D328 /* CSSTypeSelector.m */; };
+		624B28BA1B03DA820048D328 /* CSSTypeSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B28B71B03DA820048D328 /* CSSTypeSelector.m */; };
+		624B28C01B0413200048D328 /* CSSAttributeSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B28BE1B0413200048D328 /* CSSAttributeSelector.m */; };
+		624B28C11B0413200048D328 /* CSSAttributeSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B28BE1B0413200048D328 /* CSSAttributeSelector.m */; };
+		624B28C51B04190D0048D328 /* NSCharacterSet+HTMLKit.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B28C31B04190D0048D328 /* NSCharacterSet+HTMLKit.m */; };
+		624B28C61B04190D0048D328 /* NSCharacterSet+HTMLKit.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B28C31B04190D0048D328 /* NSCharacterSet+HTMLKit.m */; };
+		624B371F1B24E9BA0010BDDF /* CSSInputStream.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B371D1B24E9BA0010BDDF /* CSSInputStream.m */; };
+		624B37201B24E9BA0010BDDF /* CSSInputStream.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B371D1B24E9BA0010BDDF /* CSSInputStream.m */; };
 		624B9FB21AE0313300646C4C /* HTMLKitStringCategoryTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B9FB11AE0313300646C4C /* HTMLKitStringCategoryTests.m */; };
 		624B9FB31AE0313300646C4C /* HTMLKitStringCategoryTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B9FB11AE0313300646C4C /* HTMLKitStringCategoryTests.m */; };
 		624B9FB51AE0391400646C4C /* HTMLKitOrderedDictionaryTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624B9FB41AE0391400646C4C /* HTMLKitOrderedDictionaryTests.m */; };
@@ -95,7 +102,6 @@
 		624FC37B1AE591D80015DDF9 /* HTMLKitNodesTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 624FC3791AE591D80015DDF9 /* HTMLKitNodesTests.m */; };
 		625A14B019C7829400AD0C32 /* Cocoa.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14AF19C7829400AD0C32 /* Cocoa.framework */; };
 		625A14BA19C7829400AD0C32 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 625A14B819C7829400AD0C32 /* InfoPlist.strings */; };
-		625A14BE19C7829400AD0C32 /* HTMLKit.m in Sources */ = {isa = PBXBuildFile; fileRef = 625A14BD19C7829400AD0C32 /* HTMLKit.m */; };
 		625A14C519C7829400AD0C32 /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14C419C7829400AD0C32 /* XCTest.framework */; };
 		625A14C619C7829400AD0C32 /* Cocoa.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14AF19C7829400AD0C32 /* Cocoa.framework */; };
 		625A14C919C7829400AD0C32 /* HTMLKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14AC19C7829400AD0C32 /* HTMLKit.framework */; };
@@ -103,48 +109,102 @@
 		625A14E019C7834100AD0C32 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14DF19C7834100AD0C32 /* Foundation.framework */; };
 		625A14ED19C7834100AD0C32 /* XCTest.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14C419C7829400AD0C32 /* XCTest.framework */; };
 		625A14EE19C7834100AD0C32 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 625A14DF19C7834100AD0C32 /* Foundation.framework */; };
-		625A150219C783DE00AD0C32 /* HTMLKit.m in Sources */ = {isa = PBXBuildFile; fileRef = 625A14BD19C7829400AD0C32 /* HTMLKit.m */; };
 		625A150319C783E200AD0C32 /* HTMLKit.h in CopyFiles */ = {isa = PBXBuildFile; fileRef = 625A14BC19C7829400AD0C32 /* HTMLKit.h */; };
-		625A150419C783EB00AD0C32 /* HTMLKit.h in Headers */ = {isa = PBXBuildFile; fileRef = 625A14BC19C7829400AD0C32 /* HTMLKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
-		625A150819C78ABA00AD0C32 /* HTMLInputStreamReader.h in Headers */ = {isa = PBXBuildFile; fileRef = 625A150619C78ABA00AD0C32 /* HTMLInputStreamReader.h */; };
 		625A150919C78ABA00AD0C32 /* HTMLInputStreamReader.m in Sources */ = {isa = PBXBuildFile; fileRef = 625A150719C78ABA00AD0C32 /* HTMLInputStreamReader.m */; };
 		625A150A19C78ABA00AD0C32 /* HTMLInputStreamReader.m in Sources */ = {isa = PBXBuildFile; fileRef = 625A150719C78ABA00AD0C32 /* HTMLInputStreamReader.m */; };
-		6279F87419E1808D00F12EE5 /* HTMLElement.h in Headers */ = {isa = PBXBuildFile; fileRef = 6279F87219E1808D00F12EE5 /* HTMLElement.h */; };
+		626652F91C03D7AC00C3F121 /* HTMLKitErrorDomain.h in Headers */ = {isa = PBXBuildFile; fileRef = 626652F81C03D30F00C3F121 /* HTMLKitErrorDomain.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		6279F87519E1808D00F12EE5 /* HTMLElement.m in Sources */ = {isa = PBXBuildFile; fileRef = 6279F87319E1808D00F12EE5 /* HTMLElement.m */; };
 		6279F87619E1808D00F12EE5 /* HTMLElement.m in Sources */ = {isa = PBXBuildFile; fileRef = 6279F87319E1808D00F12EE5 /* HTMLElement.m */; };
-		62AE593519F97D880043F069 /* HTMLParseErrorToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE593319F97D880043F069 /* HTMLParseErrorToken.h */; };
+		628AF62F1BC99A6C00496128 /* CSSNthExpressionsParserTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 628AF62E1BC99A6C00496128 /* CSSNthExpressionsParserTests.m */; };
+		628AF6301BC99A6C00496128 /* CSSNthExpressionsParserTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 628AF62E1BC99A6C00496128 /* CSSNthExpressionsParserTests.m */; };
+		628AF6341BC9A63D00496128 /* CSSNthExpressionSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 628AF6321BC9A63D00496128 /* CSSNthExpressionSelector.m */; };
+		628AF6351BC9A63D00496128 /* CSSNthExpressionSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 628AF6321BC9A63D00496128 /* CSSNthExpressionSelector.m */; };
+		628AF63F1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m in Sources */ = {isa = PBXBuildFile; fileRef = 628AF63D1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m */; };
+		628AF6401BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m in Sources */ = {isa = PBXBuildFile; fileRef = 628AF63D1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m */; };
+		629AA0EA1BDD9C2900D5CC98 /* HTMLKit.h in Headers */ = {isa = PBXBuildFile; fileRef = 625A14BC19C7829400AD0C32 /* HTMLKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0EB1BDD9C2900D5CC98 /* HTMLParser.h in Headers */ = {isa = PBXBuildFile; fileRef = 62F873E919E088C90062683C /* HTMLParser.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0EC1BDD9C2900D5CC98 /* HTMLDOM.h in Headers */ = {isa = PBXBuildFile; fileRef = 62362A3F1A9FDE8A00301989 /* HTMLDOM.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0ED1BDD9C2900D5CC98 /* HTMLNode.h in Headers */ = {isa = PBXBuildFile; fileRef = 6234584C1A9D2FA4009BD491 /* HTMLNode.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0EE1BDD9C2900D5CC98 /* HTMLDocument.h in Headers */ = {isa = PBXBuildFile; fileRef = 6238578F1A9E772B003A45D9 /* HTMLDocument.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0EF1BDD9C2900D5CC98 /* HTMLDocumentType.h in Headers */ = {isa = PBXBuildFile; fileRef = 623857941A9E8606003A45D9 /* HTMLDocumentType.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F01BDD9C2900D5CC98 /* HTMLDocumentFragment.h in Headers */ = {isa = PBXBuildFile; fileRef = 623406E41ADB05AD004677A3 /* HTMLDocumentFragment.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F11BDD9C2900D5CC98 /* HTMLElement.h in Headers */ = {isa = PBXBuildFile; fileRef = 6279F87219E1808D00F12EE5 /* HTMLElement.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F21BDD9C2900D5CC98 /* HTMLComment.h in Headers */ = {isa = PBXBuildFile; fileRef = 623857991A9E8934003A45D9 /* HTMLComment.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F31BDD9C2900D5CC98 /* HTMLText.h in Headers */ = {isa = PBXBuildFile; fileRef = 62362A3A1A9FA70400301989 /* HTMLText.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F41BDD9C2A00D5CC98 /* HTMLTemplate.h in Headers */ = {isa = PBXBuildFile; fileRef = 623406DF1ADB04F9004677A3 /* HTMLTemplate.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F51BDD9C2A00D5CC98 /* HTMLNodeIterator.h in Headers */ = {isa = PBXBuildFile; fileRef = 6247A9411B152F4F00CCF25C /* HTMLNodeIterator.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F61BDD9C2A00D5CC98 /* HTMLTreeWalker.h in Headers */ = {isa = PBXBuildFile; fileRef = 624717BA1B22009200B38302 /* HTMLTreeWalker.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F71BDD9C2A00D5CC98 /* HTMLNodeTraversal.h in Headers */ = {isa = PBXBuildFile; fileRef = 624717161B22333200C11912 /* HTMLNodeTraversal.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F81BDD9C2A00D5CC98 /* HTMLNodeFilter.h in Headers */ = {isa = PBXBuildFile; fileRef = 6247A9461B152F8C00CCF25C /* HTMLNodeFilter.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0F91BDD9C2A00D5CC98 /* HTMLKitDOMExceptions.h in Headers */ = {isa = PBXBuildFile; fileRef = 6238C9831AB8D6330006512E /* HTMLKitDOMExceptions.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0FA1BDD9C2A00D5CC98 /* HTMLNamespaces.h in Headers */ = {isa = PBXBuildFile; fileRef = 628B7CE61A080E1000602C87 /* HTMLNamespaces.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0FB1BDD9C2A00D5CC98 /* HTMLQuirksMode.h in Headers */ = {isa = PBXBuildFile; fileRef = 623719431AA12EE8002E03C8 /* HTMLQuirksMode.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0FC1BDD9C2A00D5CC98 /* NSString+HTMLKit.h in Headers */ = {isa = PBXBuildFile; fileRef = 6235CE991AA509430026937B /* NSString+HTMLKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0FD1BDD9C2A00D5CC98 /* NSCharacterSet+HTMLKit.h in Headers */ = {isa = PBXBuildFile; fileRef = 624B28C21B04190D0048D328 /* NSCharacterSet+HTMLKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0FE1BDD9C2A00D5CC98 /* HTMLOrderedDictionary.h in Headers */ = {isa = PBXBuildFile; fileRef = 623424861AB467B200726190 /* HTMLOrderedDictionary.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA0FF1BDD9C2A00D5CC98 /* CSSSelectors.h in Headers */ = {isa = PBXBuildFile; fileRef = 624AB3151B04EA4200F3830D /* CSSSelectors.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1001BDD9C2A00D5CC98 /* CSSSelectorParser.h in Headers */ = {isa = PBXBuildFile; fileRef = 622BF57F1BBF2FD700363583 /* CSSSelectorParser.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1011BDD9C2A00D5CC98 /* CSSSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 62079BE71AF56F1E00D3B402 /* CSSSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1021BDD9C2B00D5CC98 /* CSSSelectorBlock.h in Headers */ = {isa = PBXBuildFile; fileRef = 62FA98061BD5A7E200A2AF86 /* CSSSelectorBlock.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1031BDD9C2B00D5CC98 /* CSSTypeSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 624B28B61B03DA820048D328 /* CSSTypeSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1041BDD9C2B00D5CC98 /* CSSAttributeSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 624B28BD1B0413200048D328 /* CSSAttributeSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1051BDD9C2B00D5CC98 /* CSSPseudoClassSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 620EE9471BC46F2A0028ED34 /* CSSPseudoClassSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1061BDD9C2B00D5CC98 /* CSSStructuralPseudoSelectors.h in Headers */ = {isa = PBXBuildFile; fileRef = 628AF63C1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1071BDD9C2B00D5CC98 /* CSSNthExpressionSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 628AF6311BC9A63D00496128 /* CSSNthExpressionSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1081BDD9C2B00D5CC98 /* CSSPseudoFunctionSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 62ACB8DB1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA1091BDD9C2B00D5CC98 /* CSSCombinatorSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 62FA04E11BCC360D009ABF98 /* CSSCombinatorSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA10A1BDD9C2B00D5CC98 /* CSSCompoundSelector.h in Headers */ = {isa = PBXBuildFile; fileRef = 620C87791BD44CBE00FB3EEE /* CSSCompoundSelector.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		629AA10B1BDD9C5200D5CC98 /* HTMLTokenizer.h in Headers */ = {isa = PBXBuildFile; fileRef = 624493A419CCC54100BCDDF4 /* HTMLTokenizer.h */; };
+		629AA10C1BDD9C5200D5CC98 /* HTMLTokenizerStates.h in Headers */ = {isa = PBXBuildFile; fileRef = 624493A919CCE84A00BCDDF4 /* HTMLTokenizerStates.h */; };
+		629AA10D1BDD9C5300D5CC98 /* HTMLTokenizerCharacters.h in Headers */ = {isa = PBXBuildFile; fileRef = 62E7CAAE19CDFFB500465A83 /* HTMLTokenizerCharacters.h */; };
+		629AA10E1BDD9C5300D5CC98 /* HTMLTokenizerEntities.h in Headers */ = {isa = PBXBuildFile; fileRef = 62F31FDB19E9DCCF007F0657 /* HTMLTokenizerEntities.h */; };
+		629AA10F1BDD9C5300D5CC98 /* HTMLTokens.h in Headers */ = {isa = PBXBuildFile; fileRef = 624AC8FE19FBF4F700BD3C4A /* HTMLTokens.h */; };
+		629AA1101BDD9C5300D5CC98 /* HTMLToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 624493AA19CD0CBE00BCDDF4 /* HTMLToken.h */; };
+		629AA1111BDD9C5300D5CC98 /* HTMLCharacterToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE594719F9948A0043F069 /* HTMLCharacterToken.h */; };
+		629AA1121BDD9C5300D5CC98 /* HTMLCommentToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE594219F992F30043F069 /* HTMLCommentToken.h */; };
+		629AA1131BDD9C5300D5CC98 /* HTMLDOCTYPEToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE593819F97E1C0043F069 /* HTMLDOCTYPEToken.h */; };
+		629AA1141BDD9C5400D5CC98 /* HTMLParseErrorToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE593319F97D880043F069 /* HTMLParseErrorToken.h */; };
+		629AA1151BDD9C5400D5CC98 /* HTMLTagToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE593D19F9907C0043F069 /* HTMLTagToken.h */; };
+		629AA1161BDD9C5400D5CC98 /* HTMLEOFToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 6238039D1AB63A8C008A53D0 /* HTMLEOFToken.h */; };
+		629AA1171BDD9C5400D5CC98 /* HTMLStackOfOpenElements.h in Headers */ = {isa = PBXBuildFile; fileRef = 6234BEEC1AABBF1400DEB15F /* HTMLStackOfOpenElements.h */; };
+		629AA1181BDD9C5400D5CC98 /* HTMLListOfActiveFormattingElements.h in Headers */ = {isa = PBXBuildFile; fileRef = 62363C3B1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.h */; };
+		629AA1191BDD9C5400D5CC98 /* HTMLElementTypes.h in Headers */ = {isa = PBXBuildFile; fileRef = 6223211D1A969B9300BACED5 /* HTMLElementTypes.h */; };
+		629AA11A1BDD9C5400D5CC98 /* HTMLElementAdjustment.h in Headers */ = {isa = PBXBuildFile; fileRef = 6234C3361AB3BF710046F527 /* HTMLElementAdjustment.h */; };
+		629AA11B1BDD9C5500D5CC98 /* HTMLParserInsertionModes.h in Headers */ = {isa = PBXBuildFile; fileRef = 6279F87119E17DC700F12EE5 /* HTMLParserInsertionModes.h */; };
+		629AA11C1BDD9C5500D5CC98 /* HTMLMarker.h in Headers */ = {isa = PBXBuildFile; fileRef = 6235CE9E1AA5170A0026937B /* HTMLMarker.h */; };
+		629AA11D1BDD9C5500D5CC98 /* CSSCodePoints.h in Headers */ = {isa = PBXBuildFile; fileRef = 624B37211B250BB50010BDDF /* CSSCodePoints.h */; };
+		629AA11E1BDD9C5500D5CC98 /* CSSInputStream.h in Headers */ = {isa = PBXBuildFile; fileRef = 624B371C1B24E9BA0010BDDF /* CSSInputStream.h */; };
+		629AA11F1BDD9C5E00D5CC98 /* CSSNthExpressionParser.h in Headers */ = {isa = PBXBuildFile; fileRef = 62F501631BC9576B0069F47B /* CSSNthExpressionParser.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		62AE593619F97D880043F069 /* HTMLParseErrorToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE593419F97D880043F069 /* HTMLParseErrorToken.m */; };
 		62AE593719F97D880043F069 /* HTMLParseErrorToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE593419F97D880043F069 /* HTMLParseErrorToken.m */; };
-		62AE593A19F97E1C0043F069 /* HTMLDOCTYPEToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE593819F97E1C0043F069 /* HTMLDOCTYPEToken.h */; };
 		62AE593B19F97E1C0043F069 /* HTMLDOCTYPEToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE593919F97E1C0043F069 /* HTMLDOCTYPEToken.m */; };
 		62AE593C19F97E1C0043F069 /* HTMLDOCTYPEToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE593919F97E1C0043F069 /* HTMLDOCTYPEToken.m */; };
-		62AE593F19F9907C0043F069 /* HTMLTagToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE593D19F9907C0043F069 /* HTMLTagToken.h */; };
 		62AE594019F9907C0043F069 /* HTMLTagToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE593E19F9907C0043F069 /* HTMLTagToken.m */; };
 		62AE594119F9907C0043F069 /* HTMLTagToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE593E19F9907C0043F069 /* HTMLTagToken.m */; };
-		62AE594419F992F30043F069 /* HTMLCommentToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE594219F992F30043F069 /* HTMLCommentToken.h */; };
 		62AE594519F992F30043F069 /* HTMLCommentToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE594319F992F30043F069 /* HTMLCommentToken.m */; };
 		62AE594619F992F30043F069 /* HTMLCommentToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE594319F992F30043F069 /* HTMLCommentToken.m */; };
-		62AE594919F9948A0043F069 /* HTMLCharacterToken.h in Headers */ = {isa = PBXBuildFile; fileRef = 62AE594719F9948A0043F069 /* HTMLCharacterToken.h */; };
 		62AE594A19F9948A0043F069 /* HTMLCharacterToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE594819F9948A0043F069 /* HTMLCharacterToken.m */; };
 		62AE594B19F9948A0043F069 /* HTMLCharacterToken.m in Sources */ = {isa = PBXBuildFile; fileRef = 62AE594819F9948A0043F069 /* HTMLCharacterToken.m */; };
 		62D8345919FB1AC4009205A9 /* HTML5LibTokenizerTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 62D8345819FB1AC4009205A9 /* HTML5LibTokenizerTest.m */; };
 		62D8345A19FB1AC4009205A9 /* HTML5LibTokenizerTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 62D8345819FB1AC4009205A9 /* HTML5LibTokenizerTest.m */; };
-		62D89DB01AE7080300B6243D /* HTMLDOM.h in Headers */ = {isa = PBXBuildFile; fileRef = 62362A3F1A9FDE8A00301989 /* HTMLDOM.h */; };
-		62D89DB11AE7081600B6243D /* HTMLTokenizerStates.h in Headers */ = {isa = PBXBuildFile; fileRef = 624493A919CCE84A00BCDDF4 /* HTMLTokenizerStates.h */; };
-		62D89DB21AE7081600B6243D /* HTMLTokenizerCharacters.h in Headers */ = {isa = PBXBuildFile; fileRef = 62E7CAAE19CDFFB500465A83 /* HTMLTokenizerCharacters.h */; };
-		62D89DB31AE7081600B6243D /* HTMLNamespaces.h in Headers */ = {isa = PBXBuildFile; fileRef = 628B7CE61A080E1000602C87 /* HTMLNamespaces.h */; };
-		62D89DB41AE7081600B6243D /* HTMLElementTypes.h in Headers */ = {isa = PBXBuildFile; fileRef = 6223211D1A969B9300BACED5 /* HTMLElementTypes.h */; };
-		62D89DB51AE7081600B6243D /* HTMLElementAdjustment.h in Headers */ = {isa = PBXBuildFile; fileRef = 6234C3361AB3BF710046F527 /* HTMLElementAdjustment.h */; };
-		62D89DB61AE7081600B6243D /* HTMLParserInsertionModes.h in Headers */ = {isa = PBXBuildFile; fileRef = 6279F87119E17DC700F12EE5 /* HTMLParserInsertionModes.h */; };
-		62D89DB71AE7081600B6243D /* HTMLQuirksMode.h in Headers */ = {isa = PBXBuildFile; fileRef = 623719431AA12EE8002E03C8 /* HTMLQuirksMode.h */; };
 		62EC7AE61AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 62EC7AE51AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m */; };
 		62EC7AE71AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 62EC7AE51AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m */; };
-		62F31FDD19E9DCCF007F0657 /* HTMLTokenizerEntities.h in Headers */ = {isa = PBXBuildFile; fileRef = 62F31FDB19E9DCCF007F0657 /* HTMLTokenizerEntities.h */; };
 		62F31FDE19E9DCCF007F0657 /* HTMLTokenizerEntities.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F31FDC19E9DCCF007F0657 /* HTMLTokenizerEntities.m */; };
 		62F31FDF19E9DCCF007F0657 /* HTMLTokenizerEntities.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F31FDC19E9DCCF007F0657 /* HTMLTokenizerEntities.m */; };
-		62F873EB19E088C90062683C /* HTMLParser.h in Headers */ = {isa = PBXBuildFile; fileRef = 62F873E919E088C90062683C /* HTMLParser.h */; };
+		62F501661BC9576B0069F47B /* CSSNthExpressionParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F501641BC9576B0069F47B /* CSSNthExpressionParser.m */; };
+		62F501671BC9576B0069F47B /* CSSNthExpressionParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F501641BC9576B0069F47B /* CSSNthExpressionParser.m */; };
+		62F658701BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F6586F1BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m */; };
+		62F658711BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F6586F1BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m */; };
 		62F873EC19E088C90062683C /* HTMLParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F873EA19E088C90062683C /* HTMLParser.m */; };
 		62F873ED19E088C90062683C /* HTMLParser.m in Sources */ = {isa = PBXBuildFile; fileRef = 62F873EA19E088C90062683C /* HTMLParser.m */; };
+		62FA04E41BCC360D009ABF98 /* CSSCombinatorSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FA04E21BCC360D009ABF98 /* CSSCombinatorSelector.m */; };
+		62FA04E51BCC360D009ABF98 /* CSSCombinatorSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FA04E21BCC360D009ABF98 /* CSSCombinatorSelector.m */; };
+		62FA98041BD57B6200A2AF86 /* CSSSelectors.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FA98031BD57B6200A2AF86 /* CSSSelectors.m */; };
+		62FA98051BD57B6200A2AF86 /* CSSSelectors.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FA98031BD57B6200A2AF86 /* CSSSelectors.m */; };
+		62FA98091BD5A7E200A2AF86 /* CSSSelectorBlock.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FA98071BD5A7E200A2AF86 /* CSSSelectorBlock.m */; };
+		62FA980A1BD5A7E200A2AF86 /* CSSSelectorBlock.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FA98071BD5A7E200A2AF86 /* CSSSelectorBlock.m */; };
+		62FC60461BD0519B0042BBE7 /* CSSSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FC60451BD0519B0042BBE7 /* CSSSelector.m */; };
+		62FC60471BD0519B0042BBE7 /* CSSSelector.m in Sources */ = {isa = PBXBuildFile; fileRef = 62FC60451BD0519B0042BBE7 /* CSSSelector.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -178,7 +238,19 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		62079BE71AF56F1E00D3B402 /* CSSSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSSelector.h; sourceTree = "<group>"; };
+		620C87791BD44CBE00FB3EEE /* CSSCompoundSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSCompoundSelector.h; sourceTree = "<group>"; };
+		620C877A1BD44CBE00FB3EEE /* CSSCompoundSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSCompoundSelector.m; sourceTree = "<group>"; };
+		620EE9471BC46F2A0028ED34 /* CSSPseudoClassSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSPseudoClassSelector.h; sourceTree = "<group>"; };
+		620EE9481BC46F2A0028ED34 /* CSSPseudoClassSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSPseudoClassSelector.m; sourceTree = "<group>"; };
+		62132E571C01F83200084175 /* CSSSelectorTest.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSSelectorTest.h; sourceTree = "<group>"; };
+		62132E581C01F83200084175 /* CSSSelectorTest.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSSelectorTest.m; sourceTree = "<group>"; };
+		62132E5B1C021FF200084175 /* css-tests */ = {isa = PBXFileReference; lastKnownFileType = folder; path = "css-tests"; sourceTree = "<group>"; };
+		621FBE591BDAD68700BC9555 /* CSSSelectorParserTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSSelectorParserTests.m; sourceTree = "<group>"; };
+		621FBE5C1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSCombinatorSelectorTests.m; sourceTree = "<group>"; };
 		6223211D1A969B9300BACED5 /* HTMLElementTypes.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HTMLElementTypes.h; sourceTree = "<group>"; };
+		622BF57F1BBF2FD700363583 /* CSSSelectorParser.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSSelectorParser.h; sourceTree = "<group>"; };
+		622BF5801BBF2FD700363583 /* CSSSelectorParser.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSSelectorParser.m; sourceTree = "<group>"; };
 		623406DF1ADB04F9004677A3 /* HTMLTemplate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLTemplate.h; sourceTree = "<group>"; };
 		623406E01ADB04F9004677A3 /* HTMLTemplate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLTemplate.m; sourceTree = "<group>"; };
 		623406E41ADB05AD004677A3 /* HTMLDocumentFragment.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLDocumentFragment.h; sourceTree = "<group>"; };
@@ -230,10 +302,22 @@
 		6247A9411B152F4F00CCF25C /* HTMLNodeIterator.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLNodeIterator.h; sourceTree = "<group>"; };
 		6247A9421B152F4F00CCF25C /* HTMLNodeIterator.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLNodeIterator.m; sourceTree = "<group>"; };
 		6247A9461B152F8C00CCF25C /* HTMLNodeFilter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLNodeFilter.h; sourceTree = "<group>"; };
+		624AB3151B04EA4200F3830D /* CSSSelectors.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CSSSelectors.h; sourceTree = "<group>"; };
+		624AB3161B0508AE00F3830D /* CSSTypeSelectorTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSTypeSelectorTests.m; sourceTree = "<group>"; };
+		624AB3191B050A4D00F3830D /* CSSAttributeSelectorTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSAttributeSelectorTests.m; sourceTree = "<group>"; };
 		624AC8FE19FBF4F700BD3C4A /* HTMLTokens.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HTMLTokens.h; sourceTree = "<group>"; };
 		624AC90019FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLKitTokenizerTests.m; sourceTree = "<group>"; };
 		624AC90419FBFE8A00BD3C4A /* html5lib-tests */ = {isa = PBXFileReference; lastKnownFileType = folder; path = "html5lib-tests"; sourceTree = "<group>"; };
 		624AC90D19FC702E00BD3C4A /* HTML Standard.html */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.html; path = "HTML Standard.html"; sourceTree = "<group>"; };
+		624B28B61B03DA820048D328 /* CSSTypeSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSTypeSelector.h; sourceTree = "<group>"; };
+		624B28B71B03DA820048D328 /* CSSTypeSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSTypeSelector.m; sourceTree = "<group>"; };
+		624B28BD1B0413200048D328 /* CSSAttributeSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSAttributeSelector.h; sourceTree = "<group>"; };
+		624B28BE1B0413200048D328 /* CSSAttributeSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSAttributeSelector.m; sourceTree = "<group>"; };
+		624B28C21B04190D0048D328 /* NSCharacterSet+HTMLKit.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSCharacterSet+HTMLKit.h"; sourceTree = "<group>"; };
+		624B28C31B04190D0048D328 /* NSCharacterSet+HTMLKit.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "NSCharacterSet+HTMLKit.m"; sourceTree = "<group>"; };
+		624B371C1B24E9BA0010BDDF /* CSSInputStream.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSInputStream.h; sourceTree = "<group>"; };
+		624B371D1B24E9BA0010BDDF /* CSSInputStream.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSInputStream.m; sourceTree = "<group>"; };
+		624B37211B250BB50010BDDF /* CSSCodePoints.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = CSSCodePoints.h; sourceTree = "<group>"; };
 		624B9FB11AE0313300646C4C /* HTMLKitStringCategoryTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLKitStringCategoryTests.m; sourceTree = "<group>"; };
 		624B9FB41AE0391400646C4C /* HTMLKitOrderedDictionaryTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLKitOrderedDictionaryTests.m; sourceTree = "<group>"; };
 		624FC3791AE591D80015DDF9 /* HTMLKitNodesTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLKitNodesTests.m; sourceTree = "<group>"; };
@@ -246,7 +330,6 @@
 		625A14B919C7829400AD0C32 /* en */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = en; path = en.lproj/InfoPlist.strings; sourceTree = "<group>"; };
 		625A14BB19C7829400AD0C32 /* HTMLKit-Prefix.pch */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "HTMLKit-Prefix.pch"; sourceTree = "<group>"; };
 		625A14BC19C7829400AD0C32 /* HTMLKit.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HTMLKit.h; sourceTree = "<group>"; };
-		625A14BD19C7829400AD0C32 /* HTMLKit.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = HTMLKit.m; sourceTree = "<group>"; };
 		625A14C319C7829400AD0C32 /* HTMLKitFrameworkTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = HTMLKitFrameworkTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		625A14C419C7829400AD0C32 /* XCTest.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = XCTest.framework; path = Library/Frameworks/XCTest.framework; sourceTree = DEVELOPER_DIR; };
 		625A14CC19C7829400AD0C32 /* HTMLKitTests-Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = "HTMLKitTests-Info.plist"; sourceTree = "<group>"; };
@@ -256,10 +339,18 @@
 		625A14EC19C7834100AD0C32 /* HTMLKitTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = HTMLKitTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		625A150619C78ABA00AD0C32 /* HTMLInputStreamReader.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLInputStreamReader.h; sourceTree = "<group>"; };
 		625A150719C78ABA00AD0C32 /* HTMLInputStreamReader.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLInputStreamReader.m; sourceTree = "<group>"; };
+		626652F81C03D30F00C3F121 /* HTMLKitErrorDomain.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HTMLKitErrorDomain.h; sourceTree = "<group>"; };
 		6279F87119E17DC700F12EE5 /* HTMLParserInsertionModes.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HTMLParserInsertionModes.h; sourceTree = "<group>"; };
 		6279F87219E1808D00F12EE5 /* HTMLElement.h */ = {isa = PBXFileReference; explicitFileType = sourcecode.c.objc; fileEncoding = 4; path = HTMLElement.h; sourceTree = "<group>"; };
 		6279F87319E1808D00F12EE5 /* HTMLElement.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLElement.m; sourceTree = "<group>"; };
+		628AF62E1BC99A6C00496128 /* CSSNthExpressionsParserTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSNthExpressionsParserTests.m; sourceTree = "<group>"; };
+		628AF6311BC9A63D00496128 /* CSSNthExpressionSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSNthExpressionSelector.h; sourceTree = "<group>"; };
+		628AF6321BC9A63D00496128 /* CSSNthExpressionSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSNthExpressionSelector.m; sourceTree = "<group>"; };
+		628AF63C1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSStructuralPseudoSelectors.h; sourceTree = "<group>"; };
+		628AF63D1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSStructuralPseudoSelectors.m; sourceTree = "<group>"; };
 		628B7CE61A080E1000602C87 /* HTMLNamespaces.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HTMLNamespaces.h; sourceTree = "<group>"; };
+		62ACB8DB1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSPseudoFunctionSelector.h; sourceTree = "<group>"; };
+		62ACB8DC1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSPseudoFunctionSelector.m; sourceTree = "<group>"; };
 		62AE593319F97D880043F069 /* HTMLParseErrorToken.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLParseErrorToken.h; sourceTree = "<group>"; };
 		62AE593419F97D880043F069 /* HTMLParseErrorToken.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLParseErrorToken.m; sourceTree = "<group>"; };
 		62AE593819F97E1C0043F069 /* HTMLDOCTYPEToken.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLDOCTYPEToken.h; sourceTree = "<group>"; };
@@ -276,8 +367,17 @@
 		62EC7AE51AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLKitMutationAlgorithmsTests.m; sourceTree = "<group>"; };
 		62F31FDB19E9DCCF007F0657 /* HTMLTokenizerEntities.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLTokenizerEntities.h; sourceTree = "<group>"; };
 		62F31FDC19E9DCCF007F0657 /* HTMLTokenizerEntities.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLTokenizerEntities.m; sourceTree = "<group>"; };
+		62F501631BC9576B0069F47B /* CSSNthExpressionParser.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSNthExpressionParser.h; sourceTree = "<group>"; };
+		62F501641BC9576B0069F47B /* CSSNthExpressionParser.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSNthExpressionParser.m; sourceTree = "<group>"; };
+		62F6586F1BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSNThExpressionSelectorTests.m; sourceTree = "<group>"; };
 		62F873E919E088C90062683C /* HTMLParser.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HTMLParser.h; sourceTree = "<group>"; };
 		62F873EA19E088C90062683C /* HTMLParser.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = HTMLParser.m; sourceTree = "<group>"; };
+		62FA04E11BCC360D009ABF98 /* CSSCombinatorSelector.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSCombinatorSelector.h; sourceTree = "<group>"; };
+		62FA04E21BCC360D009ABF98 /* CSSCombinatorSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSCombinatorSelector.m; sourceTree = "<group>"; };
+		62FA98031BD57B6200A2AF86 /* CSSSelectors.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSSelectors.m; sourceTree = "<group>"; };
+		62FA98061BD5A7E200A2AF86 /* CSSSelectorBlock.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CSSSelectorBlock.h; sourceTree = "<group>"; };
+		62FA98071BD5A7E200A2AF86 /* CSSSelectorBlock.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSSelectorBlock.m; sourceTree = "<group>"; };
+		62FC60451BD0519B0042BBE7 /* CSSSelector.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CSSSelector.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -320,6 +420,42 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		62079BE61AF5656600D3B402 /* Selectors */ = {
+			isa = PBXGroup;
+			children = (
+				624AB3151B04EA4200F3830D /* CSSSelectors.h */,
+				62FA98031BD57B6200A2AF86 /* CSSSelectors.m */,
+				624B37211B250BB50010BDDF /* CSSCodePoints.h */,
+				624B371C1B24E9BA0010BDDF /* CSSInputStream.h */,
+				624B371D1B24E9BA0010BDDF /* CSSInputStream.m */,
+				622BF57F1BBF2FD700363583 /* CSSSelectorParser.h */,
+				622BF5801BBF2FD700363583 /* CSSSelectorParser.m */,
+				62F501631BC9576B0069F47B /* CSSNthExpressionParser.h */,
+				62F501641BC9576B0069F47B /* CSSNthExpressionParser.m */,
+				62079BE71AF56F1E00D3B402 /* CSSSelector.h */,
+				62FC60451BD0519B0042BBE7 /* CSSSelector.m */,
+				62FA98061BD5A7E200A2AF86 /* CSSSelectorBlock.h */,
+				62FA98071BD5A7E200A2AF86 /* CSSSelectorBlock.m */,
+				624B28B61B03DA820048D328 /* CSSTypeSelector.h */,
+				624B28B71B03DA820048D328 /* CSSTypeSelector.m */,
+				624B28BD1B0413200048D328 /* CSSAttributeSelector.h */,
+				624B28BE1B0413200048D328 /* CSSAttributeSelector.m */,
+				620EE9471BC46F2A0028ED34 /* CSSPseudoClassSelector.h */,
+				620EE9481BC46F2A0028ED34 /* CSSPseudoClassSelector.m */,
+				628AF63C1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.h */,
+				628AF63D1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m */,
+				628AF6311BC9A63D00496128 /* CSSNthExpressionSelector.h */,
+				628AF6321BC9A63D00496128 /* CSSNthExpressionSelector.m */,
+				62ACB8DB1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.h */,
+				62ACB8DC1BC5C13E00E283C1 /* CSSPseudoFunctionSelector.m */,
+				62FA04E11BCC360D009ABF98 /* CSSCombinatorSelector.h */,
+				62FA04E21BCC360D009ABF98 /* CSSCombinatorSelector.m */,
+				620C87791BD44CBE00FB3EEE /* CSSCompoundSelector.h */,
+				620C877A1BD44CBE00FB3EEE /* CSSCompoundSelector.m */,
+			);
+			name = Selectors;
+			sourceTree = "<group>";
+		};
 		6236738C1AC0CD2400FF89B3 /* Tokenizer */ = {
 			isa = PBXGroup;
 			children = (
@@ -451,12 +587,13 @@
 			isa = PBXGroup;
 			children = (
 				625A14BC19C7829400AD0C32 /* HTMLKit.h */,
-				625A14BD19C7829400AD0C32 /* HTMLKit.m */,
+				626652F81C03D30F00C3F121 /* HTMLKitErrorDomain.h */,
 				62AE593219F97CCA0043F069 /* Tokenizing */,
 				628E16EC1ADAE71700B15A06 /* Parsing */,
 				623719441AA1472B002E03C8 /* DOM */,
 				628E16ED1ADAE73700B15A06 /* Categories */,
 				628E16EE1ADAE75300B15A06 /* Structures */,
+				62079BE61AF5656600D3B402 /* Selectors */,
 				625A14B619C7829400AD0C32 /* Supporting Files */,
 			);
 			name = "Source Code";
@@ -481,6 +618,7 @@
 				624B9FB71AE072CB00646C4C /* DOM */,
 				624B9FB81AE072D500646C4C /* Categories */,
 				624E1A2D1B1D1C8A00E66AAC /* Structures */,
+				62FF516C1C0A430A009BFDFE /* Selectors */,
 				625A14CB19C7829400AD0C32 /* Supporting Files */,
 			);
 			name = Tests;
@@ -490,6 +628,7 @@
 		625A14CB19C7829400AD0C32 /* Supporting Files */ = {
 			isa = PBXGroup;
 			children = (
+				62132E5B1C021FF200084175 /* css-tests */,
 				624AC90D19FC702E00BD3C4A /* HTML Standard.html */,
 				624AC90419FBFE8A00BD3C4A /* html5lib-tests */,
 				625A14CC19C7829400AD0C32 /* HTMLKitTests-Info.plist */,
@@ -521,6 +660,8 @@
 			children = (
 				6235CE991AA509430026937B /* NSString+HTMLKit.h */,
 				6235CE9A1AA509430026937B /* NSString+HTMLKit.m */,
+				624B28C21B04190D0048D328 /* NSCharacterSet+HTMLKit.h */,
+				624B28C31B04190D0048D328 /* NSCharacterSet+HTMLKit.m */,
 			);
 			name = Categories;
 			sourceTree = "<group>";
@@ -564,6 +705,21 @@
 			name = Tokenizing;
 			sourceTree = "<group>";
 		};
+		62FF516C1C0A430A009BFDFE /* Selectors */ = {
+			isa = PBXGroup;
+			children = (
+				62132E571C01F83200084175 /* CSSSelectorTest.h */,
+				62132E581C01F83200084175 /* CSSSelectorTest.m */,
+				621FBE591BDAD68700BC9555 /* CSSSelectorParserTests.m */,
+				628AF62E1BC99A6C00496128 /* CSSNthExpressionsParserTests.m */,
+				624AB3161B0508AE00F3830D /* CSSTypeSelectorTests.m */,
+				624AB3191B050A4D00F3830D /* CSSAttributeSelectorTests.m */,
+				62F6586F1BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m */,
+				621FBE5C1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m */,
+			);
+			name = Selectors;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -571,45 +727,61 @@
 			isa = PBXHeadersBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				624717181B22333200C11912 /* HTMLNodeTraversal.h in Headers */,
-				6235CE9B1AA509430026937B /* NSString+HTMLKit.h in Headers */,
-				62D89DB11AE7081600B6243D /* HTMLTokenizerStates.h in Headers */,
-				62D89DB21AE7081600B6243D /* HTMLTokenizerCharacters.h in Headers */,
-				62D89DB31AE7081600B6243D /* HTMLNamespaces.h in Headers */,
-				62D89DB41AE7081600B6243D /* HTMLElementTypes.h in Headers */,
-				62D89DB51AE7081600B6243D /* HTMLElementAdjustment.h in Headers */,
-				62D89DB61AE7081600B6243D /* HTMLParserInsertionModes.h in Headers */,
-				62D89DB71AE7081600B6243D /* HTMLQuirksMode.h in Headers */,
-				62D89DB01AE7080300B6243D /* HTMLDOM.h in Headers */,
-				62F873EB19E088C90062683C /* HTMLParser.h in Headers */,
-				624AC8FF19FBF59800BD3C4A /* HTMLTokens.h in Headers */,
-				62AE594419F992F30043F069 /* HTMLCommentToken.h in Headers */,
-				624493AC19CD0CBE00BCDDF4 /* HTMLToken.h in Headers */,
-				6235CEA01AA5170A0026937B /* HTMLMarker.h in Headers */,
-				62F31FDD19E9DCCF007F0657 /* HTMLTokenizerEntities.h in Headers */,
-				623406E11ADB04F9004677A3 /* HTMLTemplate.h in Headers */,
-				6234BEEE1AABBF1400DEB15F /* HTMLStackOfOpenElements.h in Headers */,
-				6238C9851AB8D6330006512E /* HTMLKitDOMExceptions.h in Headers */,
-				6238039F1AB63A8C008A53D0 /* HTMLEOFToken.h in Headers */,
-				6279F87419E1808D00F12EE5 /* HTMLElement.h in Headers */,
-				62AE593F19F9907C0043F069 /* HTMLTagToken.h in Headers */,
-				623857911A9E772B003A45D9 /* HTMLDocument.h in Headers */,
-				624493A619CCC54100BCDDF4 /* HTMLTokenizer.h in Headers */,
-				62AE593A19F97E1C0043F069 /* HTMLDOCTYPEToken.h in Headers */,
-				6247A9471B152F8C00CCF25C /* HTMLNodeFilter.h in Headers */,
-				623424881AB467B200726190 /* HTMLOrderedDictionary.h in Headers */,
-				6247A9431B152F4F00CCF25C /* HTMLNodeIterator.h in Headers */,
-				625A150419C783EB00AD0C32 /* HTMLKit.h in Headers */,
-				625A150819C78ABA00AD0C32 /* HTMLInputStreamReader.h in Headers */,
-				6238579B1A9E8934003A45D9 /* HTMLComment.h in Headers */,
-				62AE593519F97D880043F069 /* HTMLParseErrorToken.h in Headers */,
-				62AE594919F9948A0043F069 /* HTMLCharacterToken.h in Headers */,
-				623857961A9E8606003A45D9 /* HTMLDocumentType.h in Headers */,
-				623406E61ADB05AD004677A3 /* HTMLDocumentFragment.h in Headers */,
-				62363C3D1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.h in Headers */,
-				624717BC1B22009200B38302 /* HTMLTreeWalker.h in Headers */,
-				62362A3C1A9FA70400301989 /* HTMLText.h in Headers */,
-				6234584E1A9D2FA4009BD491 /* HTMLNode.h in Headers */,
+				629AA0EA1BDD9C2900D5CC98 /* HTMLKit.h in Headers */,
+				626652F91C03D7AC00C3F121 /* HTMLKitErrorDomain.h in Headers */,
+				629AA0EB1BDD9C2900D5CC98 /* HTMLParser.h in Headers */,
+				629AA0EC1BDD9C2900D5CC98 /* HTMLDOM.h in Headers */,
+				629AA0ED1BDD9C2900D5CC98 /* HTMLNode.h in Headers */,
+				629AA0EE1BDD9C2900D5CC98 /* HTMLDocument.h in Headers */,
+				629AA0EF1BDD9C2900D5CC98 /* HTMLDocumentType.h in Headers */,
+				629AA0F01BDD9C2900D5CC98 /* HTMLDocumentFragment.h in Headers */,
+				629AA0F11BDD9C2900D5CC98 /* HTMLElement.h in Headers */,
+				629AA0F21BDD9C2900D5CC98 /* HTMLComment.h in Headers */,
+				629AA0F31BDD9C2900D5CC98 /* HTMLText.h in Headers */,
+				629AA0F41BDD9C2A00D5CC98 /* HTMLTemplate.h in Headers */,
+				629AA0F51BDD9C2A00D5CC98 /* HTMLNodeIterator.h in Headers */,
+				629AA0F61BDD9C2A00D5CC98 /* HTMLTreeWalker.h in Headers */,
+				629AA0F71BDD9C2A00D5CC98 /* HTMLNodeTraversal.h in Headers */,
+				629AA0F81BDD9C2A00D5CC98 /* HTMLNodeFilter.h in Headers */,
+				629AA0F91BDD9C2A00D5CC98 /* HTMLKitDOMExceptions.h in Headers */,
+				629AA0FA1BDD9C2A00D5CC98 /* HTMLNamespaces.h in Headers */,
+				629AA0FB1BDD9C2A00D5CC98 /* HTMLQuirksMode.h in Headers */,
+				629AA0FC1BDD9C2A00D5CC98 /* NSString+HTMLKit.h in Headers */,
+				629AA0FD1BDD9C2A00D5CC98 /* NSCharacterSet+HTMLKit.h in Headers */,
+				629AA0FE1BDD9C2A00D5CC98 /* HTMLOrderedDictionary.h in Headers */,
+				629AA0FF1BDD9C2A00D5CC98 /* CSSSelectors.h in Headers */,
+				629AA1001BDD9C2A00D5CC98 /* CSSSelectorParser.h in Headers */,
+				629AA11F1BDD9C5E00D5CC98 /* CSSNthExpressionParser.h in Headers */,
+				629AA1011BDD9C2A00D5CC98 /* CSSSelector.h in Headers */,
+				629AA1021BDD9C2B00D5CC98 /* CSSSelectorBlock.h in Headers */,
+				629AA1031BDD9C2B00D5CC98 /* CSSTypeSelector.h in Headers */,
+				629AA1041BDD9C2B00D5CC98 /* CSSAttributeSelector.h in Headers */,
+				629AA1051BDD9C2B00D5CC98 /* CSSPseudoClassSelector.h in Headers */,
+				629AA1061BDD9C2B00D5CC98 /* CSSStructuralPseudoSelectors.h in Headers */,
+				629AA1071BDD9C2B00D5CC98 /* CSSNthExpressionSelector.h in Headers */,
+				629AA1081BDD9C2B00D5CC98 /* CSSPseudoFunctionSelector.h in Headers */,
+				629AA1091BDD9C2B00D5CC98 /* CSSCombinatorSelector.h in Headers */,
+				629AA10A1BDD9C2B00D5CC98 /* CSSCompoundSelector.h in Headers */,
+				629AA10B1BDD9C5200D5CC98 /* HTMLTokenizer.h in Headers */,
+				629AA10C1BDD9C5200D5CC98 /* HTMLTokenizerStates.h in Headers */,
+				629AA10D1BDD9C5300D5CC98 /* HTMLTokenizerCharacters.h in Headers */,
+				629AA10E1BDD9C5300D5CC98 /* HTMLTokenizerEntities.h in Headers */,
+				629AA10F1BDD9C5300D5CC98 /* HTMLTokens.h in Headers */,
+				629AA1101BDD9C5300D5CC98 /* HTMLToken.h in Headers */,
+				629AA1111BDD9C5300D5CC98 /* HTMLCharacterToken.h in Headers */,
+				629AA1121BDD9C5300D5CC98 /* HTMLCommentToken.h in Headers */,
+				629AA1131BDD9C5300D5CC98 /* HTMLDOCTYPEToken.h in Headers */,
+				629AA1141BDD9C5400D5CC98 /* HTMLParseErrorToken.h in Headers */,
+				629AA1151BDD9C5400D5CC98 /* HTMLTagToken.h in Headers */,
+				629AA1161BDD9C5400D5CC98 /* HTMLEOFToken.h in Headers */,
+				629AA1171BDD9C5400D5CC98 /* HTMLStackOfOpenElements.h in Headers */,
+				629AA1181BDD9C5400D5CC98 /* HTMLListOfActiveFormattingElements.h in Headers */,
+				629AA1191BDD9C5400D5CC98 /* HTMLElementTypes.h in Headers */,
+				629AA11A1BDD9C5400D5CC98 /* HTMLElementAdjustment.h in Headers */,
+				629AA11B1BDD9C5500D5CC98 /* HTMLParserInsertionModes.h in Headers */,
+				629AA11C1BDD9C5500D5CC98 /* HTMLMarker.h in Headers */,
+				629AA11D1BDD9C5500D5CC98 /* CSSCodePoints.h in Headers */,
+				629AA11E1BDD9C5500D5CC98 /* CSSInputStream.h in Headers */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -693,7 +865,7 @@
 		625A14A319C7829400AD0C32 /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 0610;
+				LastUpgradeCheck = 0700;
 				ORGANIZATIONNAME = BrainCookie;
 				TargetAttributes = {
 					625A14C219C7829400AD0C32 = {
@@ -739,6 +911,7 @@
 			files = (
 				624AC90F19FC702E00BD3C4A /* HTML Standard.html in Resources */,
 				624AC90519FBFE9A00BD3C4A /* html5lib-tests in Resources */,
+				62132E5D1C021FF200084175 /* css-tests in Resources */,
 				625A14CF19C7829400AD0C32 /* InfoPlist.strings in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -747,6 +920,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				62132E5C1C021FF200084175 /* css-tests in Resources */,
 				624AC90619FBFEA000BD3C4A /* html5lib-tests in Resources */,
 				624AC90E19FC702E00BD3C4A /* HTML Standard.html in Resources */,
 			);
@@ -759,34 +933,48 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				62F501671BC9576B0069F47B /* CSSNthExpressionParser.m in Sources */,
 				62362A3E1A9FA70400301989 /* HTMLText.m in Sources */,
+				622BF5831BBF2FD700363583 /* CSSSelectorParser.m in Sources */,
 				6235CE9D1AA509430026937B /* NSString+HTMLKit.m in Sources */,
 				6247A9451B152F4F00CCF25C /* HTMLNodeIterator.m in Sources */,
 				6238579D1A9E8934003A45D9 /* HTMLComment.m in Sources */,
 				6234BEF01AABBF1400DEB15F /* HTMLStackOfOpenElements.m in Sources */,
 				624493AE19CD0CBE00BCDDF4 /* HTMLToken.m in Sources */,
 				6235CEA21AA5170A0026937B /* HTMLMarker.m in Sources */,
+				62FA98051BD57B6200A2AF86 /* CSSSelectors.m in Sources */,
 				6234248A1AB467B200726190 /* HTMLOrderedDictionary.m in Sources */,
 				624717BE1B22009200B38302 /* HTMLTreeWalker.m in Sources */,
 				62AE594119F9907C0043F069 /* HTMLTagToken.m in Sources */,
+				624B37201B24E9BA0010BDDF /* CSSInputStream.m in Sources */,
 				62AE594619F992F30043F069 /* HTMLCommentToken.m in Sources */,
 				62363C3F1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.m in Sources */,
 				62AE593C19F97E1C0043F069 /* HTMLDOCTYPEToken.m in Sources */,
 				623406E31ADB04F9004677A3 /* HTMLTemplate.m in Sources */,
+				62FA04E51BCC360D009ABF98 /* CSSCombinatorSelector.m in Sources */,
 				6238C9871AB8D6330006512E /* HTMLKitDOMExceptions.m in Sources */,
+				62FA980A1BD5A7E200A2AF86 /* CSSSelectorBlock.m in Sources */,
+				628AF6401BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m in Sources */,
 				6247171A1B22333200C11912 /* HTMLNodeTraversal.m in Sources */,
 				62F873ED19E088C90062683C /* HTMLParser.m in Sources */,
 				623803A11AB63A8C008A53D0 /* HTMLEOFToken.m in Sources */,
+				624B28C61B04190D0048D328 /* NSCharacterSet+HTMLKit.m in Sources */,
 				6279F87619E1808D00F12EE5 /* HTMLElement.m in Sources */,
+				620C877D1BD44CBE00FB3EEE /* CSSCompoundSelector.m in Sources */,
 				625A150A19C78ABA00AD0C32 /* HTMLInputStreamReader.m in Sources */,
+				628AF6351BC9A63D00496128 /* CSSNthExpressionSelector.m in Sources */,
 				623857931A9E772B003A45D9 /* HTMLDocument.m in Sources */,
 				623406E81ADB05AD004677A3 /* HTMLDocumentFragment.m in Sources */,
 				624717B91B21FE5400B38302 /* HTMLNodeFilter.m in Sources */,
+				620EE94B1BC46F2A0028ED34 /* CSSPseudoClassSelector.m in Sources */,
 				624493A819CCC54100BCDDF4 /* HTMLTokenizer.m in Sources */,
-				625A14BE19C7829400AD0C32 /* HTMLKit.m in Sources */,
+				624B28BA1B03DA820048D328 /* CSSTypeSelector.m in Sources */,
+				62FC60471BD0519B0042BBE7 /* CSSSelector.m in Sources */,
 				623857981A9E8606003A45D9 /* HTMLDocumentType.m in Sources */,
+				620C877F1BD4519A00FB3EEE /* CSSPseudoFunctionSelector.m in Sources */,
 				62AE594B19F9948A0043F069 /* HTMLCharacterToken.m in Sources */,
 				623458501A9D2FA4009BD491 /* HTMLNode.m in Sources */,
+				624B28C11B0413200048D328 /* CSSAttributeSelector.m in Sources */,
 				62F31FDF19E9DCCF007F0657 /* HTMLTokenizerEntities.m in Sources */,
 				62AE593719F97D880043F069 /* HTMLParseErrorToken.m in Sources */,
 			);
@@ -796,11 +984,15 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				62132E5A1C01F83200084175 /* CSSSelectorTest.m in Sources */,
 				6239755B1AC362CA007E26F1 /* HTMLKitTreeConstructionTests.m in Sources */,
+				62F658711BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m in Sources */,
 				623CAF9E1AD88BEA00E34C32 /* HTMLKitParserPerformance.m in Sources */,
 				6247171D1B2240B800C11912 /* HTMLTreeWalkerTests.m in Sources */,
 				62EC7AE71AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m in Sources */,
+				624AB31B1B050A4D00F3830D /* CSSAttributeSelectorTests.m in Sources */,
 				624B9FB61AE0391400646C4C /* HTMLKitOrderedDictionaryTests.m in Sources */,
+				624AB3181B0508AE00F3830D /* CSSTypeSelectorTests.m in Sources */,
 				6236738F1AC0CE2500FF89B3 /* HTMLKitTokenizerPerformance.m in Sources */,
 				624AC90219FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m in Sources */,
 				624B9FB31AE0313300646C4C /* HTMLKitStringCategoryTests.m in Sources */,
@@ -808,6 +1000,9 @@
 				62D8345A19FB1AC4009205A9 /* HTML5LibTokenizerTest.m in Sources */,
 				6239755F1AC364BB007E26F1 /* HTML5LibTreeConstructionTest.m in Sources */,
 				624FC37B1AE591D80015DDF9 /* HTMLKitNodesTests.m in Sources */,
+				621FBE5B1BDAD68700BC9555 /* CSSSelectorParserTests.m in Sources */,
+				621FBE5E1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m in Sources */,
+				628AF6301BC99A6C00496128 /* CSSNthExpressionsParserTests.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -816,6 +1011,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				62362A3D1A9FA70400301989 /* HTMLText.m in Sources */,
+				622BF5821BBF2FD700363583 /* CSSSelectorParser.m in Sources */,
 				6235CE9C1AA509430026937B /* NSString+HTMLKit.m in Sources */,
 				6247A9441B152F4F00CCF25C /* HTMLNodeIterator.m in Sources */,
 				6238579C1A9E8934003A45D9 /* HTMLComment.m in Sources */,
@@ -823,26 +1019,39 @@
 				624493AD19CD0CBE00BCDDF4 /* HTMLToken.m in Sources */,
 				6235CEA11AA5170A0026937B /* HTMLMarker.m in Sources */,
 				623424891AB467B200726190 /* HTMLOrderedDictionary.m in Sources */,
+				62FA98041BD57B6200A2AF86 /* CSSSelectors.m in Sources */,
 				624717BD1B22009200B38302 /* HTMLTreeWalker.m in Sources */,
 				62AE594019F9907C0043F069 /* HTMLTagToken.m in Sources */,
+				62F501661BC9576B0069F47B /* CSSNthExpressionParser.m in Sources */,
+				624B371F1B24E9BA0010BDDF /* CSSInputStream.m in Sources */,
 				62AE594519F992F30043F069 /* HTMLCommentToken.m in Sources */,
 				62363C3E1ABE428200DAB4C6 /* HTMLListOfActiveFormattingElements.m in Sources */,
 				62AE593B19F97E1C0043F069 /* HTMLDOCTYPEToken.m in Sources */,
 				623406E21ADB04F9004677A3 /* HTMLTemplate.m in Sources */,
+				62FA04E41BCC360D009ABF98 /* CSSCombinatorSelector.m in Sources */,
+				628AF63F1BC9D6FB00496128 /* CSSStructuralPseudoSelectors.m in Sources */,
+				62FA98091BD5A7E200A2AF86 /* CSSSelectorBlock.m in Sources */,
 				6238C9861AB8D6330006512E /* HTMLKitDOMExceptions.m in Sources */,
 				624717191B22333200C11912 /* HTMLNodeTraversal.m in Sources */,
 				62F873EC19E088C90062683C /* HTMLParser.m in Sources */,
 				623803A01AB63A8C008A53D0 /* HTMLEOFToken.m in Sources */,
+				624B28C51B04190D0048D328 /* NSCharacterSet+HTMLKit.m in Sources */,
 				6279F87519E1808D00F12EE5 /* HTMLElement.m in Sources */,
+				620C877C1BD44CBE00FB3EEE /* CSSCompoundSelector.m in Sources */,
 				625A150919C78ABA00AD0C32 /* HTMLInputStreamReader.m in Sources */,
 				623857921A9E772B003A45D9 /* HTMLDocument.m in Sources */,
 				623406E71ADB05AD004677A3 /* HTMLDocumentFragment.m in Sources */,
 				624717B81B21FE5400B38302 /* HTMLNodeFilter.m in Sources */,
+				620EE94A1BC46F2A0028ED34 /* CSSPseudoClassSelector.m in Sources */,
 				624493A719CCC54100BCDDF4 /* HTMLTokenizer.m in Sources */,
-				625A150219C783DE00AD0C32 /* HTMLKit.m in Sources */,
+				624B28B91B03DA820048D328 /* CSSTypeSelector.m in Sources */,
 				623857971A9E8606003A45D9 /* HTMLDocumentType.m in Sources */,
+				62FC60461BD0519B0042BBE7 /* CSSSelector.m in Sources */,
 				62AE594A19F9948A0043F069 /* HTMLCharacterToken.m in Sources */,
+				620C877E1BD4519A00FB3EEE /* CSSPseudoFunctionSelector.m in Sources */,
 				6234584F1A9D2FA4009BD491 /* HTMLNode.m in Sources */,
+				624B28C01B0413200048D328 /* CSSAttributeSelector.m in Sources */,
+				628AF6341BC9A63D00496128 /* CSSNthExpressionSelector.m in Sources */,
 				62F31FDE19E9DCCF007F0657 /* HTMLTokenizerEntities.m in Sources */,
 				62AE593619F97D880043F069 /* HTMLParseErrorToken.m in Sources */,
 			);
@@ -852,11 +1061,15 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				62132E591C01F83200084175 /* CSSSelectorTest.m in Sources */,
 				6239755A1AC362CA007E26F1 /* HTMLKitTreeConstructionTests.m in Sources */,
+				62F658701BD83C8E0045F137 /* CSSNThExpressionSelectorTests.m in Sources */,
 				623CAF9D1AD88BEA00E34C32 /* HTMLKitParserPerformance.m in Sources */,
 				6247171C1B2240B800C11912 /* HTMLTreeWalkerTests.m in Sources */,
 				62EC7AE61AEEAC6F0015D3BE /* HTMLKitMutationAlgorithmsTests.m in Sources */,
+				624AB31A1B050A4D00F3830D /* CSSAttributeSelectorTests.m in Sources */,
 				624B9FB51AE0391400646C4C /* HTMLKitOrderedDictionaryTests.m in Sources */,
+				624AB3171B0508AE00F3830D /* CSSTypeSelectorTests.m in Sources */,
 				6236738E1AC0CE2500FF89B3 /* HTMLKitTokenizerPerformance.m in Sources */,
 				624AC90119FBF9ED00BD3C4A /* HTMLKitTokenizerTests.m in Sources */,
 				624B9FB21AE0313300646C4C /* HTMLKitStringCategoryTests.m in Sources */,
@@ -864,6 +1077,9 @@
 				62D8345919FB1AC4009205A9 /* HTML5LibTokenizerTest.m in Sources */,
 				6239755E1AC364BB007E26F1 /* HTML5LibTreeConstructionTest.m in Sources */,
 				624FC37A1AE591D80015DDF9 /* HTMLKitNodesTests.m in Sources */,
+				621FBE5A1BDAD68700BC9555 /* CSSSelectorParserTests.m in Sources */,
+				621FBE5D1BDAD90200BC9555 /* CSSCombinatorSelectorTests.m in Sources */,
+				628AF62F1BC99A6C00496128 /* CSSNthExpressionsParserTests.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -919,6 +1135,7 @@
 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
+				ENABLE_TESTABILITY = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
 				GCC_ENABLE_OBJC_EXCEPTIONS = YES;
@@ -976,12 +1193,14 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
+				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				FRAMEWORK_VERSION = A;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "HTMLKit/HTMLKit-Prefix.pch";
 				INFOPLIST_FILE = "HTMLKit/HTMLKit-Info.plist";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.braincookie.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = HTMLKit;
 				WRAPPER_EXTENSION = framework;
 			};
@@ -991,12 +1210,14 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				COMBINE_HIDPI_IMAGES = YES;
+				DEFINES_MODULE = YES;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				FRAMEWORK_VERSION = A;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "HTMLKit/HTMLKit-Prefix.pch";
 				INFOPLIST_FILE = "HTMLKit/HTMLKit-Info.plist";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.braincookie.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = HTMLKit;
 				WRAPPER_EXTENSION = framework;
 			};
@@ -1018,6 +1239,7 @@
 					"$(inherited)",
 				);
 				INFOPLIST_FILE = "HTMLKitTests/HTMLKitTests-Info.plist";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.braincookie.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				TEST_HOST = "$(BUNDLE_LOADER)";
 				WRAPPER_EXTENSION = xctest;
@@ -1036,6 +1258,7 @@
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "HTMLKit/HTMLKit-Prefix.pch";
 				INFOPLIST_FILE = "HTMLKitTests/HTMLKitTests-Info.plist";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.braincookie.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				TEST_HOST = "$(BUNDLE_LOADER)";
 				WRAPPER_EXTENSION = xctest;
@@ -1045,6 +1268,7 @@
 		625A14FD19C7834100AD0C32 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				DEFINES_MODULE = YES;
 				DSTROOT = /tmp/HTMLKit.dst;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "HTMLKit/HTMLKit-Prefix.pch";
@@ -1063,6 +1287,7 @@
 		625A14FE19C7834100AD0C32 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				DEFINES_MODULE = YES;
 				DSTROOT = /tmp/HTMLKit.dst;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "HTMLKit/HTMLKit-Prefix.pch";
@@ -1091,6 +1316,8 @@
 				);
 				INFOPLIST_FILE = "HTMLKitTests/HTMLKitTests-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 7.1;
+				OTHER_LDFLAGS = " -ObjC";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.braincookie.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = iphoneos;
 				TEST_HOST = "$(BUNDLE_LOADER)";
@@ -1110,6 +1337,8 @@
 				GCC_PREFIX_HEADER = "HTMLKit/HTMLKit-Prefix.pch";
 				INFOPLIST_FILE = "HTMLKitTests/HTMLKitTests-Info.plist";
 				IPHONEOS_DEPLOYMENT_TARGET = 7.1;
+				OTHER_LDFLAGS = " -ObjC";
+				PRODUCT_BUNDLE_IDENTIFIER = "com.braincookie.${PRODUCT_NAME:rfc1034identifier}";
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SDKROOT = iphoneos;
 				TEST_HOST = "$(BUNDLE_LOADER)";

HTMLKit.xcworkspace/contents.xcworkspacedata

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

HTMLKit/CSSAttributeSelector.h

@@ -0,0 +1,30 @@
+//
+//  CSSAttributeSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSAttributeSelector : CSSSelector
+
+@property (nonatomic, assign) CSSAttributeSelectorType type;
+@property (nonatomic, strong, readonly) NSString *name;
+@property (nonatomic, strong, readonly) NSString *value;
+
++ (instancetype)classSelector:(NSString *)className;
++ (instancetype)idSelector:(NSString *)elementId;
++ (instancetype)hasAttributeSelector:(NSString *)attributeName;
+
+- (instancetype)initWithType:(CSSAttributeSelectorType)type
+						attributeName:(NSString *)name
+			  attrbiuteValue:(NSString *)value;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSAttributeSelector.m

@@ -0,0 +1,111 @@
+//
+//  CSSAttributeSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSAttributeSelector.h"
+#import "HTMLElement.h"
+#import "NSCharacterSet+HTMLKit.h"
+
+@interface CSSAttributeSelector ()
+{
+	CSSAttributeSelectorType _type;
+	NSString *_name;
+	NSString *_value;
+}
+@end
+
+@implementation CSSAttributeSelector
+
++ (instancetype)classSelector:(NSString *)className
+{
+	return [[self alloc] initWithType:CSSAttributeSelectorIncludes attributeName:@"class" attrbiuteValue:className];
+}
+
++ (instancetype)idSelector:(NSString *)elementId
+{
+	return [[self alloc] initWithType:CSSAttributeSelectorExactMatch attributeName:@"id" attrbiuteValue:elementId];
+}
+
++ (instancetype)hasAttributeSelector:(NSString *)attributeName
+{
+	return [[self alloc] initWithType:CSSAttributeSelectorExists attributeName:attributeName attrbiuteValue:@""];
+}
+
+- (instancetype)initWithType:(CSSAttributeSelectorType)type
+			   attributeName:(NSString *)name
+			  attrbiuteValue:(NSString *)value
+{
+	self = [super init];
+	if (self) {
+		self.type = type;
+		_name = [name copy];
+		_value = value ? [value copy]: @"";
+	}
+	return self;
+}
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	switch (_type) {
+		case CSSAttributeSelectorExists:
+		{
+			return !!element[_name];
+		}
+		case CSSAttributeSelectorExactMatch:
+		{
+			return [element[_name] isEqualToString:_value];
+		}
+		case CSSAttributeSelectorIncludes:
+		{
+			NSArray *components = [element[_name] componentsSeparatedByCharactersInSet:[NSCharacterSet HTMLWhitespaceCharacterSet]];
+			return [components containsObject:_value];
+		}
+		case CSSAttributeSelectorBegins:
+		{
+			return [element[_name] hasPrefix:_value];
+		}
+		case CSSAttributeSelectorEnds:
+		{
+			return [element[_name] hasSuffix:_value];
+		}
+		case CSSAttributeSelectorContains:
+		{
+			return [element[_name] containsString:_value];
+		}
+		case CSSAttributeSelectorHyphen:
+		{
+			return [element[_name] isEqualToString:_value] || [element[_name] hasPrefix:[_value stringByAppendingString:@"-"]];
+		}
+		case CSSAttributeSelectorNot:
+		{
+			return ![element[_name] isEqualToString:_value];
+		}
+		default:
+			return NO;
+	}
+}
+
+#pragma mark - Description
+
+- (NSString *)debugDescription
+{
+	if (self.type == CSSAttributeSelectorExists) {
+		return [NSString stringWithFormat:@"[%@]", self.name];
+	}
+
+	NSString *matcher = @{@(CSSAttributeSelectorExactMatch): @"=",
+						  @(CSSAttributeSelectorIncludes): @"~=",
+						  @(CSSAttributeSelectorBegins): @"^=",
+						  @(CSSAttributeSelectorEnds): @"$=",
+						  @(CSSAttributeSelectorContains): @"*=",
+						  @(CSSAttributeSelectorHyphen): @"|=",
+						  @(CSSAttributeSelectorNot): @"!="}[@(self.type)];
+
+	return [NSString stringWithFormat:@"[%@%@'%@']", self.name, matcher, self.value];
+}
+
+@end

HTMLKit/CSSCodePoints.h

@@ -0,0 +1,140 @@
+//
+//  CSSTokenizer	CODEPOINTs.h
+//  HTMLKit
+//
+//  Created by Iska on 08/06/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#define CODEPOINTS \
+	CODEPOINT( CONTROL, 0x0080 ) \
+	CODEPOINT( CHARACTER_TABULATION, 0x0009 ) \
+	CODEPOINT( LINE_FEED, 0x000A ) \
+	CODEPOINT( SPACE, 0x0020 ) \
+	CODEPOINT( QUOTATION_MARK, 0x0022 ) \
+	CODEPOINT( NUMBER_SIGN, 0x0023 ) \
+	CODEPOINT( DOLLAR_SIGN, 0x0024 ) \
+	CODEPOINT( APOSTROPHE, 0x0027 ) \
+	CODEPOINT( LEFT_PARENTHESIS, 0x0028 ) \
+	CODEPOINT( RIGHT_PARENTHESIS, 0x0029 ) \
+	CODEPOINT( ASTERIX, 0x002A ) \
+	CODEPOINT( PLUS_SIGN, 0x002B ) \
+	CODEPOINT( COMMA, 0x002C ) \
+	CODEPOINT( HYPHEN_MINUS, 0x002D ) \
+	CODEPOINT( FULL_STOP, 0x002E ) \
+	CODEPOINT( DIGIT_ZERO, 0x0030 ) \
+	CODEPOINT( DIGIT_NINE, 0x0039 ) \
+	CODEPOINT( COLON, 0x003A ) \
+	CODEPOINT( EQUALS_SIGN, 0x003D ) \
+	CODEPOINT( GREATER_THAN_SIGN, 0x003E ) \
+	CODEPOINT( LATIN_CAPITAL_LETTER_A, 0x0041 ) \
+	CODEPOINT( LATIN_CAPITAL_LETTER_F, 0x0046 ) \
+	CODEPOINT( LATIN_CAPITAL_LETTER_Z, 0x005A ) \
+	CODEPOINT( LEFT_SQUARE_BRACKET, 0x005B ) \
+	CODEPOINT( REVERSE_SOLIDUS, 0x005C ) \
+	CODEPOINT( RIGHT_SQUARE_BRACKET, 0x005D ) \
+	CODEPOINT( CIRCUMFLEX_ACCENT, 0x005E ) \
+	CODEPOINT( LOW_LINE, 0x005F ) \
+	CODEPOINT( LATIN_SMALL_LETTER_A, 0x0061 ) \
+	CODEPOINT( LATIN_SMALL_LETTER_F, 0x0066 ) \
+	CODEPOINT( LATIN_SMALL_LETTER_Z, 0x007A ) \
+	CODEPOINT( VERTICAL_LINE, 0x007C ) \
+	CODEPOINT( TILDE, 0x007E ) \
+	CODEPOINT( REPLACEMENT_CHARACTER, 0xFFFD )
+
+#define CODEPOINT( name, value ) static UniChar const name = value;
+CODEPOINTS
+#undef CODEPOINT
+
+NS_INLINE BOOL isWhitespace(UTF32Char codePoint)
+{
+	return (codePoint == CHARACTER_TABULATION ||
+			codePoint == LINE_FEED ||
+			codePoint == SPACE);
+}
+
+NS_INLINE BOOL isCombinator(UTF32Char codePoint)
+{
+	return (codePoint == SPACE ||
+			codePoint == PLUS_SIGN ||
+			codePoint == COMMA ||
+			codePoint == GREATER_THAN_SIGN ||
+			codePoint == TILDE);
+}
+
+NS_INLINE BOOL isDigit(UTF32Char codePoint)
+{
+	return codePoint >= DIGIT_ZERO && codePoint <= DIGIT_NINE;
+}
+
+NS_INLINE BOOL isHexDigit(UTF32Char codePoint)
+{
+	return ((codePoint >= DIGIT_ZERO && codePoint <= DIGIT_NINE) ||
+			(codePoint >= LATIN_CAPITAL_LETTER_A && codePoint <= LATIN_CAPITAL_LETTER_F) ||
+			(codePoint >= LATIN_SMALL_LETTER_A && codePoint <= LATIN_SMALL_LETTER_F));
+}
+
+NS_INLINE BOOL isQuote(UTF32Char codePoint)
+{
+	return codePoint == QUOTATION_MARK || codePoint == APOSTROPHE;
+}
+
+NS_INLINE BOOL isNewLine(UTF32Char codePoint)
+{
+	return codePoint == LINE_FEED;
+}
+
+NS_INLINE BOOL isNameStart(UTF32Char codePoint)
+{
+	return ((codePoint >= LATIN_CAPITAL_LETTER_A && codePoint <= LATIN_CAPITAL_LETTER_Z) ||
+			(codePoint >= LATIN_SMALL_LETTER_A && codePoint <= LATIN_SMALL_LETTER_Z) ||
+			codePoint >= CONTROL ||
+			codePoint == LOW_LINE);
+}
+
+NS_INLINE BOOL isName(UTF32Char codePoint)
+{
+	return isNameStart(codePoint) || isDigit(codePoint) || codePoint == HYPHEN_MINUS;
+}
+
+NS_INLINE BOOL isValidEscape(UTF32Char first, UTF32Char second)
+{
+	if (first != REVERSE_SOLIDUS || isNewLine(second)) {
+		return false;
+	}
+
+	return YES;
+}
+
+NS_INLINE BOOL isValidEscapedCodePoint(UTF32Char codePoint)
+{
+	return (codePoint != 0 &&
+			!(codePoint >= 0xD800 && codePoint <= 0x0DFFF) &&
+			codePoint <= 0x10FFFF);
+}
+
+NS_INLINE BOOL isValidIdentifierStart(UTF32Char first, UTF32Char second, UTF32Char third)
+{
+	if (first == HYPHEN_MINUS) {
+		if (isNameStart(second) ||
+			second == HYPHEN_MINUS ||
+			isValidEscape(second, third)) {
+			return YES;
+		} else {
+			return NO;
+		}
+	} else if (isNameStart(first)) {
+		return YES;
+	} else if (first == REVERSE_SOLIDUS) {
+		return isValidEscape(first, second);
+	} else {
+		return NO;
+	}
+}
+
+NS_INLINE void AppendCodePoint(CFMutableStringRef string, UTF32Char codePoint)
+{
+	UniChar pair[2];
+	Boolean isPair = CFStringGetSurrogatePairForLongCharacter(codePoint, pair);
+	CFStringAppendCharacters(string, pair, isPair ? 2 : 1);
+}

HTMLKit/CSSCombinatorSelector.h

@@ -0,0 +1,22 @@
+//
+//  CSSCombinatorSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 12/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSCombinatorSelector : CSSSelector
+
++ (instancetype)childOfElementCombinator:(CSSSelector *)selector;
++ (instancetype)descendantOfElementCombinator:(CSSSelector *)selector;
++ (instancetype)adjacentSiblingCombinator:(CSSSelector *)selector;
++ (instancetype)generalSiblingCombinator:(CSSSelector *)selector;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSCombinatorSelector.m

@@ -0,0 +1,154 @@
+//
+//  CSSCombinatorSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 12/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSCombinatorSelector.h"
+#import "HTMLElement.h"
+
+#pragma mark - Declarations
+
+@interface CSSChildOfElementCombinatorSelector : CSSCombinatorSelector
+@end
+
+@interface CSSDecendantOfElementCombinatorSelector : CSSCombinatorSelector
+@end
+
+@interface CSSAdjacentSiblingCombinatorSelector : CSSCombinatorSelector
+@end
+
+@interface CSSGeneralSiblingCombinatorSelector : CSSCombinatorSelector
+@end
+
+#pragma mark - Base Combinator
+
+@interface CSSCombinatorSelector ()
+{
+	CSSSelector *_selector;
+}
+@property (nonatomic, strong, readonly) CSSSelector *selector;
+@end
+
+@implementation CSSCombinatorSelector
+@synthesize selector = _selector;
+
++ (instancetype)childOfElementCombinator:(CSSSelector *)selector
+{
+	return [[CSSChildOfElementCombinatorSelector alloc] initWithSelector:selector];
+}
+
++ (instancetype)descendantOfElementCombinator:(CSSSelector *)selector
+{
+	return [[CSSDecendantOfElementCombinatorSelector alloc] initWithSelector:selector];
+}
+
++ (instancetype)adjacentSiblingCombinator:(CSSSelector *)selector
+{
+	return [[CSSAdjacentSiblingCombinatorSelector alloc] initWithSelector:selector];
+}
+
++ (instancetype)generalSiblingCombinator:(CSSSelector *)selector
+{
+	return [[CSSGeneralSiblingCombinatorSelector alloc] initWithSelector:selector];
+}
+
+- (instancetype)initWithSelector:(CSSSelector *)selector
+{
+	self = [super init];
+	if (self) {
+		_selector = selector;
+	}
+	return self;
+}
+
+@end
+
+#pragma mark - Child OfElement Combinator
+
+@implementation CSSChildOfElementCombinatorSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	HTMLElement *parent = element.parentElement;
+	return parent != nil && [self.selector acceptElement:parent];
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@"%@ > ", self.selector.debugDescription];
+}
+
+@end
+
+#pragma mark - Decendant Of Element Combinator
+
+@implementation CSSDecendantOfElementCombinatorSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	HTMLElement *parent = element.parentElement;
+
+	while (parent != nil) {
+		if ([self.selector acceptElement:parent]) {
+			return YES;
+		}
+		parent = parent.parentElement;
+	}
+
+	return NO;
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@"%@ ", self.selector.debugDescription];
+}
+
+@end
+
+#pragma mark - Adjacent Sibling Combinator
+
+@implementation CSSAdjacentSiblingCombinatorSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	HTMLNode *previous = element.previousSiblingElement;
+	if (previous == nil || previous.nodeType != HTMLNodeElement) {
+		return NO;
+	}
+	return [self.selector acceptElement:previous.asElement];
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@"%@ + ", self.selector.debugDescription];
+}
+
+@end
+
+#pragma mark - General Sibling Combinator
+
+@implementation CSSGeneralSiblingCombinatorSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	HTMLNode *previous = element.previousSiblingElement;
+
+	while (previous != nil && previous.nodeType == HTMLNodeElement) {
+		if ([self.selector acceptElement:previous.asElement]) {
+			return YES;
+		}
+		previous = previous.previousSiblingElement;
+	}
+
+	return NO;
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@"%@ ~ ", self.selector.debugDescription];
+}
+
+@end

HTMLKit/CSSCompoundSelector.h

@@ -0,0 +1,22 @@
+//
+//  CSSCompoundSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 18/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSCompoundSelector : CSSSelector
+
++ (instancetype)andSelector:(NSArray<CSSSelector *> *)selectors;
++ (instancetype)orSelector:(NSArray<CSSSelector *> *)selectors;
+
+- (void)addSelector:(CSSSelector *)selector;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSCompoundSelector.m

@@ -0,0 +1,99 @@
+//
+//  CSSCompoundSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 18/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSCompoundSelector.h"
+
+#pragma mark - Declarations
+
+@interface CSSAndCompoundSelector : CSSCompoundSelector
+@end
+
+@interface CSSOrCompoundSelector : CSSCompoundSelector
+@end
+
+#pragma mark - Base Combinator
+
+@interface CSSCompoundSelector ()
+{
+	NSMutableArray *_selectors;
+}
+@property (nonatomic, strong, readonly) NSArray *selectors;
+@end
+
+@implementation CSSCompoundSelector
+@synthesize selectors = _selectors;
+
++ (instancetype)andSelector:(NSArray *)selectors
+{
+	return [[CSSAndCompoundSelector alloc] initWithSelectors:selectors];
+}
+
++ (instancetype)orSelector:(NSArray *)selectors
+{
+	return [[CSSOrCompoundSelector alloc] initWithSelectors:selectors];
+}
+
+- (instancetype)initWithSelectors:(NSArray *)selectors
+{
+	self = [super init];
+	if (self) {
+		_selectors = [[NSMutableArray alloc] initWithArray:selectors];
+	}
+	return self;
+}
+
+- (void)addSelector:(CSSSelector *)selector
+{
+	[_selectors addObject:selector];
+}
+
+@end
+
+#pragma mark - And Compound Selector
+
+@implementation CSSAndCompoundSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	for (CSSSelector *selector in self.selectors) {
+		if (![selector acceptElement:element]) {
+			return NO;
+		}
+	}
+	return YES;
+}
+
+- (NSString *)debugDescription
+{
+	NSArray *descriptions = [self.selectors valueForKey:@"debugDescription"];
+	return [descriptions componentsJoinedByString:@""];
+}
+
+@end
+
+#pragma mark - Or Compound Selector
+
+@implementation CSSOrCompoundSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	for (CSSSelector *selector in self.selectors) {
+		if ([selector acceptElement:element]) {
+			return YES;
+		}
+	}
+	return NO;
+}
+
+- (NSString *)debugDescription
+{
+	NSArray *descriptions = [self.selectors valueForKey:@"debugDescription"];
+	return [descriptions componentsJoinedByString:@","];
+}
+
+@end

HTMLKit/CSSInputStream.h

@@ -0,0 +1,20 @@
+//
+//  CSSInputStream.h
+//  HTMLKit
+//
+//  Created by Iska on 07/06/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "HTMLInputStreamReader.h"
+
+@interface CSSInputStream : HTMLInputStreamReader
+
+- (void)consumeWhitespace;
+- (NSString *)consumeIdentifier;
+- (NSString *)consumeStringWithEndingCodePoint:(UTF32Char)endingCodePoint;
+- (UTF32Char)consumeEscapedCodePoint;
+- (NSString *)consumeCombinator;
+
+@end

HTMLKit/CSSInputStream.m

@@ -0,0 +1,128 @@
+//
+//  CSSInputStream.m
+//  HTMLKit
+//
+//  Created by Iska on 07/06/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSInputStream.h"
+#import "CSSCodePoints.h"
+
+@interface HTMLInputStreamReader ()
+- (void)emitParseError:(NSString *)reason;
+@end
+
+@implementation CSSInputStream
+
+- (void)consumeWhitespace
+{
+	while (isWhitespace(self.nextInputCharacter)) {
+		[self consumeNextInputCharacter];
+	}
+}
+
+- (NSString *)consumeIdentifier
+{
+	CFMutableStringRef value = CFStringCreateMutable(kCFAllocatorDefault, 0);
+
+	if (!isValidIdentifierStart([self inputCharacterPointAtOffset:0],
+								[self inputCharacterPointAtOffset:1],
+								[self inputCharacterPointAtOffset:2])) {
+		return nil;
+	}
+
+	while (YES) {
+		UTF32Char codePoint = [self consumeNextInputCharacter];
+		if (codePoint == EOF) {
+			break;
+		} else if (isName(codePoint)) {
+			AppendCodePoint(value, codePoint);
+		} else if (isValidEscape(codePoint, [self inputCharacterPointAtOffset:1])) {
+			UTF32Char escapedCodePoint = [self consumeEscapedCodePoint];
+			AppendCodePoint(value, escapedCodePoint);
+		} else {
+			[self reconsumeCurrentInputCharacter];
+			break;
+		}
+	}
+
+	return (__bridge NSString *)(CFStringGetLength(value) > 0 ? value : nil);
+}
+
+- (NSString *)consumeStringWithEndingCodePoint:(UTF32Char)endingCodePoint
+{
+	CFMutableStringRef value = CFStringCreateMutable(kCFAllocatorDefault, 0);
+
+	while (YES) {
+		UTF32Char codePoint = [self consumeNextInputCharacter];
+		if (codePoint == endingCodePoint) {
+			break;
+		}
+
+		switch (codePoint) {
+			case EOF:
+				break;
+			case LINE_FEED:
+				[self emitParseError:@"New-line character (0x000A) in CSS attribute value"];
+				[self reconsumeCurrentInputCharacter];
+				break;
+			case REVERSE_SOLIDUS:
+			{
+				UTF32Char next = self.nextInputCharacter;
+				if (next == EOF) {
+					continue;
+				} else if (next == LINE_FEED) {
+					[self consumeNextInputCharacter];
+				} else {
+					UTF32Char escapedCodePoint = [self consumeNextInputCharacter];
+					AppendCodePoint(value, escapedCodePoint);
+				}
+			}
+			default:
+				AppendCodePoint(value, codePoint);
+				break;
+		}
+	}
+
+	return (__bridge NSString *)(CFStringGetLength(value) > 0 ? value : nil);
+}
+
+- (UTF32Char)consumeEscapedCodePoint
+{
+	UTF32Char codePoint = [self consumeNextInputCharacter];
+
+	if (isHexDigit(codePoint)) {
+		CFMutableStringRef hexString = CFStringCreateMutable(kCFAllocatorDefault, 6);
+		AppendCodePoint(hexString, codePoint);
+
+		while (isHexDigit(self.nextInputCharacter) && CFStringGetLength(hexString) <= 6) {
+			UniChar codePoint = [self consumeNextInputCharacter];
+			CFStringAppendCharacters(hexString, &codePoint, 1);
+		}
+
+		if (isWhitespace(self.nextInputCharacter)) {
+			[self consumeNextInputCharacter];
+		}
+
+		NSScanner *scanner = [NSScanner scannerWithString:(__bridge NSString *)(hexString)];
+		UTF32Char number;
+		[scanner scanHexInt:&number];
+
+		return isValidEscapedCodePoint(number) ? number : REPLACEMENT_CHARACTER;
+	} else if (codePoint == EOF) {
+		return REPLACEMENT_CHARACTER;
+	}
+
+	return codePoint;
+}
+
+- (NSString *)consumeCombinator
+{
+	NSString *combinator = [self consumeCharactersInString:@" >+~"];
+	combinator = [combinator stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+
+	return combinator;
+}
+
+@end

HTMLKit/CSSNthExpressionParser.h

@@ -0,0 +1,16 @@
+//
+//  CSSNthExpression.h
+//  HTMLKit
+//
+//  Created by Iska on 10/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "CSSSelectors.h"
+
+@interface CSSNthExpressionParser : NSObject
+
++ (CSSNthExpression)parseExpression:(NSString *)expression;
+
+@end

HTMLKit/CSSNthExpressionParser.m

@@ -0,0 +1,50 @@
+//
+//  CSSNthExpression.m
+//  HTMLKit
+//
+//  Created by Iska on 10/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSNthExpressionParser.h"
+#import "CSSCodePoints.h"
+#import "NSString+HTMLKit.h"
+#import "NSCharacterSet+HTMLKit.h"
+
+@implementation CSSNthExpressionParser
+
++ (CSSNthExpression)parseExpression:(NSString *)expression
+{
+	NSCharacterSet *whitespace = [NSCharacterSet whitespaceAndNewlineCharacterSet];
+
+	NSString *string = [expression.lowercaseString copy];
+	string = [[string stringByTrimmingCharactersInSet:whitespace] copy];
+
+	if ([string isEqualToStringIgnoringCase:@"odd"]) {
+		return CSSNthExpressionOdd;
+	} else if ([string isEqualToStringIgnoringCase:@"even"]) {
+		return CSSNthExpressionEven;
+	}
+
+	NSCharacterSet *set = [[NSCharacterSet CSSNthExpressionCharacterSet] invertedSet];
+	if ([string rangeOfCharacterFromSet:set].location != NSNotFound) {
+		return CSSNthExpressionMake(0, 0);
+	}
+	NSArray *parts = [string componentsSeparatedByString:@"n"];
+
+	if (parts.count == 1) {
+		NSInteger b = [parts[0] integerValue];
+		return CSSNthExpressionMake(0, b);
+	} else if (parts.count == 2) {
+		NSInteger a = [parts[0] integerValue];
+		if (a == 0) {
+			a = [parts[0] isEqualToString:@"-"] ? -1 : 1;
+		}
+		NSInteger b = [parts[1] integerValue];
+		return CSSNthExpressionMake(a, b);
+	} else {
+		return CSSNthExpressionMake(0, 0);
+	}
+}
+
+@end

HTMLKit/CSSNthExpressionSelector.h

@@ -0,0 +1,25 @@
+//
+//  CSSNthExpressionSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 10/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSNthExpressionSelector : CSSSelector
+
+@property (nonatomic, strong, readonly) NSString *className;
+@property (nonatomic, assign, readonly) CSSNthExpression expression;
+
++ (instancetype)nthChildSelector:(CSSNthExpression)expression;
++ (instancetype)nthLastChildSelector:(CSSNthExpression)expression;
++ (instancetype)nthOfTypeSelector:(CSSNthExpression)expression;
++ (instancetype)nthLastOfTypeSelector:(CSSNthExpression)expression;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSNthExpressionSelector.m

@@ -0,0 +1,130 @@
+//
+//  CSSNthExpressionSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 10/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSNthExpressionSelector.h"
+#import "HTMLElement.h"
+
+#pragma mark - Nth-Expression
+
+const CSSNthExpression CSSNthExpressionOdd = (CSSNthExpression) {
+	.an = 2, .b = 1
+};
+
+const CSSNthExpression CSSNthExpressionEven = (CSSNthExpression) {
+	.an = 2, .b = 0
+};
+
+NSString * _Nonnull NSStringFromNthExpression(CSSNthExpression expression)
+{
+	if (expression.an == 0 && expression.b == 0) {
+		return @"invalid";
+	}
+
+	if (expression.an == 0) {
+		return [NSString stringWithFormat:@"%ld", expression.b];
+	}
+	if (expression.b == 0) {
+		return [NSString stringWithFormat:@"%ldn", expression.an];
+	}
+
+	return [NSString stringWithFormat:@"%ldn%+ld", expression.an, expression.b];
+}
+
+#pragma mark - Implementation
+
+NSInteger computeIndex(NSEnumerator *enumerator, HTMLElement *element)
+{
+	NSInteger index = 0;
+	for (HTMLNode *node in enumerator) {
+		if (node.nodeType != HTMLNodeElement) {
+			continue;
+		}
+
+		if ([node.asElement.tagName isEqualToString:element.tagName]) {
+			index++;
+		}
+
+		if (node == element) {
+			break;
+		}
+	}
+
+	return index;
+}
+
+@interface CSSNthExpressionSelector ()
+{
+	NSString *_className;
+	CSSNthExpression _expression;
+	NSInteger (^ _computeIndex)(HTMLElement *);
+}
+@end
+
+@implementation CSSNthExpressionSelector
+@synthesize expression = _expression;
+@synthesize className = _className;
+
++ (instancetype)nthChildSelector:(CSSNthExpression)expression
+{
+	return [[self alloc] initWithClassName:@"nth-child" expression:expression block:^NSInteger(HTMLElement *element) {
+		return [element.parentElement indexOfChildElement:element] + 1;
+	}];
+}
+
++ (instancetype)nthLastChildSelector:(CSSNthExpression)expression
+{
+	return [[self alloc] initWithClassName:@"nth-last-child" expression:expression block:^NSInteger(HTMLElement *element) {
+		return element.parentElement.childElementsCount - [element.parentElement indexOfChildElement:element];
+	}];
+}
+
++ (instancetype)nthOfTypeSelector:(CSSNthExpression)expression
+{
+	return [[self alloc] initWithClassName:@"nth-of-type" expression:expression block:^NSInteger(HTMLElement *element) {
+		return computeIndex(element.parentElement.childNodes.array.objectEnumerator, element);
+	}];
+}
+
++ (instancetype)nthLastOfTypeSelector:(CSSNthExpression)expression
+{
+	return [[self alloc] initWithClassName:@"nth-last-of-type" expression:expression block:^NSInteger(HTMLElement *element) {
+		return computeIndex(element.parentElement.childNodes.array.reverseObjectEnumerator, element);
+	}];
+}
+
+- (instancetype)initWithClassName:(NSString *)className
+					   expression:(CSSNthExpression)expression
+							block:(NSInteger (^)(HTMLElement *element))block
+{
+	self = [super init];
+	if (self) {
+		_className = [className copy];
+		_expression = expression;
+		_computeIndex = [block copy];
+	}
+	return self;
+}
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	NSInteger index = _computeIndex(element);
+
+	if (_expression.an == 0) {
+		return index == _expression.b;
+	} else {
+		NSInteger diff = (index - _expression.b);
+		return (diff * _expression.an >= 0) && (diff % _expression.an == 0);
+	}
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@":%@(%@)", self.className, NSStringFromNthExpression(self.expression)];
+}
+
+@end

HTMLKit/CSSPseudoClassSelector.h

@@ -0,0 +1,21 @@
+//
+//  CSSPseudoClassSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 06/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSPseudoClassSelector : CSSSelector
+
+@property (nonatomic, strong, readonly)  NSString *className;
+
+- (instancetype)initWithClassName:(NSString *)className selector:(CSSSelector *)selector;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSPseudoClassSelector.m

@@ -0,0 +1,46 @@
+//
+//  CSSPseudoClassSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 06/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSPseudoClassSelector.h"
+
+@interface CSSPseudoClassSelector ()
+{
+	NSString *_className;
+	CSSSelector *_selector;
+}
+@end
+
+@implementation CSSPseudoClassSelector
+@synthesize className = _className;
+
+- (instancetype)initWithClassName:(NSString *)className selector:(CSSSelector *)selector
+{
+	self = [super init];
+	if (self) {
+		_className = [className copy];
+		_selector = selector;
+	}
+	return self;
+}
+
+-(BOOL)acceptElement:(HTMLElement *)element
+{
+	return [_selector acceptElement:element];
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@":%@", self.className];
+}
+
+- (NSString *)description
+{
+	return [NSString stringWithFormat:@"<%@: %p '%@'>", self.class, self, self.debugDescription];
+}
+
+@end

HTMLKit/CSSPseudoFunctionSelector.h

@@ -0,0 +1,20 @@
+//
+//  CSSPseudoFunctionSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 07/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSPseudoFunctionSelector : CSSSelector
+
++ (instancetype)notSelector:(CSSSelector *)selector;
++ (instancetype)hasSelector:(CSSSelector *)selector;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSPseudoFunctionSelector.m

@@ -0,0 +1,89 @@
+//
+//  CSSPseudoFunctionSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 07/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSPseudoFunctionSelector.h"
+#import "HTMLElement.h"
+
+#pragma mark - Declarations
+
+@interface CSSNotSelector : CSSPseudoFunctionSelector
+@end
+
+@interface CSSHasSelector : CSSPseudoFunctionSelector
+@end
+
+#pragma mark - Base Function Selector
+
+@interface CSSPseudoFunctionSelector ()
+{
+	CSSSelector *_selector;
+}
+@property (nonatomic, strong, readonly) CSSSelector *selector;
+@end
+
+@implementation CSSPseudoFunctionSelector
+@synthesize selector = _selector;
+
++ (instancetype)notSelector:(CSSSelector *)selector
+{
+	return [[CSSNotSelector alloc] initWithSelector:selector];
+}
+
++ (instancetype)hasSelector:(CSSSelector *)selector
+{
+	return [[CSSHasSelector alloc] initWithSelector:selector];
+}
+
+- (instancetype)initWithSelector:(CSSSelector *)selector
+{
+	self = [super init];
+	if (self) {
+		_selector = selector;
+	}
+	return self;
+}
+
+@end
+
+#pragma mark - Not Selector
+
+@implementation CSSNotSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	return ![self.selector acceptElement:element];
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@":not(%@)", self.selector.debugDescription];
+}
+
+@end
+
+#pragma mark - Has Selector
+
+@implementation CSSHasSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	for (HTMLNode *child in element.childNodes) {
+		if (child.nodeType == HTMLNodeElement && [self.selector acceptElement:child.asElement]) {
+			return YES;
+		}
+	}
+
+	return NO;
+}
+
+- (NSString *)debugDescription
+{
+	return [NSString stringWithFormat:@":has(%@)", self.selector.debugDescription];
+}
+
+@end

HTMLKit/CSSSelector.h

@@ -0,0 +1,49 @@
+//
+//  HTMLSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 02/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+#pragma mark - Attribute Selector Type
+
+typedef NS_ENUM(NSUInteger, CSSAttributeSelectorType)
+{
+	CSSAttributeSelectorExists,
+	CSSAttributeSelectorExactMatch,
+	CSSAttributeSelectorIncludes,
+	CSSAttributeSelectorBegins,
+	CSSAttributeSelectorEnds,
+	CSSAttributeSelectorContains,
+	CSSAttributeSelectorHyphen,
+	CSSAttributeSelectorNot
+};
+
+#pragma mark - CSS Nth-Expression
+
+typedef struct CSSNthExpression
+{
+	NSInteger an;
+	NSInteger b;
+} CSSNthExpression;
+
+NS_INLINE CSSNthExpression CSSNthExpressionMake(NSInteger an, NSInteger b) {
+	return (CSSNthExpression){ .an = an, .b = b };
+}
+
+extern const CSSNthExpression CSSNthExpressionOdd;
+extern const CSSNthExpression CSSNthExpressionEven;
+extern NSString * _Nonnull NSStringFromNthExpression(CSSNthExpression expression);
+
+#pragma mark - Base Selector Class
+
+@class HTMLElement;
+
+@interface CSSSelector : NSObject 
+
+- (BOOL)acceptElement:(nonnull HTMLElement *)element;
+
+@end

HTMLKit/CSSSelector.m

@@ -0,0 +1,33 @@
+//
+//  CSSSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 15/10/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "CSSSelector.h"
+
+@implementation CSSSelector
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	[self doesNotRecognizeSelector:_cmd];
+	return NO;
+}
+
+#pragma mark - Description
+
+- (NSString *)debugDescription
+{
+	[self doesNotRecognizeSelector:_cmd];
+	return @"";
+}
+
+- (NSString *)description
+{
+	return [NSString stringWithFormat:@"<%@: %p '%@'>", self.class, self, self.debugDescription];
+}
+
+@end

HTMLKit/CSSSelectorBlock.h

@@ -0,0 +1,21 @@
+//
+//  CSSSelectorBlock.h
+//  HTMLKit
+//
+//  Created by Iska on 20/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@class HTMLElement;
+
+@interface CSSSelectorBlock : CSSSelector
+
+- (instancetype)initWithName:(NSString *)name block:(BOOL (^)(HTMLElement *))block;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSSelectorBlock.m

@@ -0,0 +1,40 @@
+//
+//  CSSSelectorBlock.m
+//  HTMLKit
+//
+//  Created by Iska on 20/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelectorBlock.h"
+
+@interface CSSSelectorBlock ()
+{
+	NSString *_name;
+	BOOL (^ _acceptBlock)(HTMLElement *);
+}
+@end
+
+@implementation CSSSelectorBlock
+
+- (instancetype)initWithName:(NSString *)name block:(BOOL (^)(HTMLElement *))block
+{
+	self = [super init];
+	if (self) {
+		_name = [name copy];
+		_acceptBlock = [block copy];
+	}
+	return self;
+}
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	return _acceptBlock ? _acceptBlock(element) : NO;
+}
+
+- (NSString *)debugDescription
+{
+	return _name;
+}
+
+@end

HTMLKit/CSSSelectorParser.h

@@ -0,0 +1,17 @@
+//
+//  CSSSelectorParser.h
+//  HTMLKit
+//
+//  Created by Iska on 02/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@class CSSSelector;
+
+@interface CSSSelectorParser : NSObject
+
++ (CSSSelector *)parseSelector:(NSString *)string error:(NSError **)error;
+
+@end

HTMLKit/CSSSelectorParser.m

@@ -0,0 +1,367 @@
+//
+//  CSSSelectorParser.m
+//  HTMLKit
+//
+//  Created by Iska on 02/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelectorParser.h"
+#import "CSSInputStream.h"
+#import "CSSCodePoints.h"
+#import "CSSSelectors.h"
+#import "NSString+HTMLKit.h"
+#import "NSCharacterSet+HTMLKit.h"
+#import "CSSNthExpressionParser.h"
+#import "CSSCompoundSelector.h"
+#import "HTMLKitErrorDomain.h"
+
+@interface CSSSelectorParser ()
+{
+	NSString *_string;
+	CSSInputStream *_inputStream;
+	NSUInteger _location;
+
+	NSMutableArray *_selectors;
+}
+@end
+
+@implementation CSSSelectorParser
+
++ (CSSSelector *)parseSelector:(NSString *)string error:(NSError * __autoreleasing *)error
+{
+	CSSSelectorParser *parser = [[CSSSelectorParser alloc] initWithString:string];
+	CSSSelector *selector = [parser parse:error];
+
+	return selector;
+}
+
+#pragma mark - Init
+
+- (instancetype)initWithString:(NSString *)string
+{
+	self = [super init];
+	if (self) {
+		_string = [self preprocessInput:string];
+		_location = 0;
+	}
+	return self;
+}
+
+- (NSString *)preprocessInput:(NSString *)string
+{
+	string = [string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
+	string = [string stringByReplacingOccurrencesOfString:@"\r\n" withString:@"\n"];
+	string = [string stringByReplacingOccurrencesOfString:@"\r" withString:@"\n"];
+	string = [string stringByReplacingOccurrencesOfString:@"\f" withString:@"\n"];
+	string = [string stringByReplacingOccurrencesOfString:@"\0" withString:@"\uFFFD"];
+
+	return string;
+}
+
+#pragma mark - Errors
+
+- (void)emitError:(NSError * __autoreleasing *)error reason:(NSString *)reason location:(NSUInteger)location
+{
+	NSDictionary *userInfo = @{
+							   NSLocalizedDescriptionKey: @"Error parsing selector",
+							   NSLocalizedFailureReasonErrorKey: reason,
+							   CSSSelectorStringKey: _string,
+							   CSSSelectorErrorLocationKey: @(location)
+							   };
+
+	if(error) {
+		*error = [NSError errorWithDomain:HTMLKitSelectorErrorDomain code:HTMLKitSelectorParseError userInfo:userInfo];
+	}
+}
+
+#pragma mark - Parsing
+
+- (CSSSelector *)parse:(NSError * __autoreleasing *)error
+{
+	if (_string.length == 0) {
+		[self emitError:error reason:@"Empty selector" location:0];
+		return nil;
+	}
+
+	NSArray *allSubSelectors = [_string componentsSeparatedByString:@","];
+	NSMutableArray *parsed = [NSMutableArray array];
+
+	for (NSString *subSelector in allSubSelectors) {
+		if ([subSelector isEqualToString:@""]) {
+			[self emitError:error reason:@"Empty selector" location:_location];
+			break;
+		}
+
+		CSSSelector *selector = [self parseSelector:subSelector error:error];
+		if (selector == nil) {
+			break;
+		}
+		[parsed addObject:selector];
+
+		_location += subSelector.length;
+	}
+
+	if (*error != nil) {
+		return nil;
+	}
+
+	if (parsed.count > 1) {
+		return anyOf(parsed);
+	}
+
+	return parsed.firstObject;
+}
+
+- (CSSSelector *)parseSelector:(NSString *)selectorString error:(NSError * __autoreleasing *)error
+{
+	_inputStream = [[CSSInputStream alloc] initWithString:selectorString];
+	[_inputStream consumeWhitespace];
+
+	CSSSelector *result = nil;
+
+	while (YES) {
+		CSSSelector *selector = [self parseSequenceOfSimpleSelectors:error];
+		if (selector == nil) {
+			break;
+		}
+
+		result = result ? allOf(@[result, selector]) : selector;
+
+		UTF32Char next = _inputStream.nextInputCharacter;
+
+		if (isCombinator(next)) {
+			NSString *combinator = [_inputStream consumeCombinator];
+
+			if ([combinator isEqualToString:@""]) {
+				result = descendantOfElementSelector(result);
+			} else if ([combinator isEqualToString:@">"]) {
+				result = childOfElementSelector(result);
+			} else if ([combinator isEqualToString:@"+"]) {
+				result = adjacentSiblingSelector(result);
+			} else if ([combinator isEqualToString:@"~"]) {
+				result = generalSiblingSelector(result);
+			}
+		}
+	}
+
+	return result;
+}
+
+- (CSSSelector *)parseSequenceOfSimpleSelectors:(NSError * __autoreleasing *)error
+{
+	NSMutableArray *selectors = [NSMutableArray array];
+
+	CSSSelector *typeSelector = [self parseTypeSelector:error];
+	if (typeSelector != nil) {
+		[selectors addObject:typeSelector];
+	}
+
+	while (YES) {
+		UTF32Char next = _inputStream.nextInputCharacter;
+		if (next == EOF || isCombinator(next)) {
+			break;
+		}
+
+		CSSSelector *simpleSelector = [self parseSimpleSelector:error];
+		if (simpleSelector == nil) {
+			return nil;
+		}
+		[selectors addObject:simpleSelector];
+	}
+
+	if (selectors.count > 1) {
+		return allOf(selectors);
+	}
+
+	return selectors.firstObject;
+}
+
+- (CSSSelector *)parseTypeSelector:(NSError * __autoreleasing *)error
+{
+	NSString *identifier = [_inputStream consumeIdentifier];
+	if (identifier != nil) {
+		return typeSelector(identifier);
+	}
+
+	if ([_inputStream consumeCharacter:ASTERIX]) {
+		return universalSelector();
+	}
+
+	return nil;
+}
+
+- (CSSSelector *)parseSimpleSelector:(NSError * __autoreleasing *)error
+{
+	CSSSelector *typeSelector = [self parseTypeSelector:error];
+	if (typeSelector != nil) {
+		return typeSelector;
+	}
+
+	UTF32Char codePoint = [_inputStream consumeNextInputCharacter];
+	switch (codePoint) {
+		case NUMBER_SIGN:
+		{
+			NSString *elementId = [_inputStream consumeIdentifier];
+			if (elementId == nil) {
+				[self emitError:error reason:@"Invalid character" location:_location + _inputStream.currentLocation];
+				return nil;
+			}
+			return  idSelector(elementId);
+		}
+		case FULL_STOP:
+		{
+			NSString *className = [_inputStream consumeIdentifier];
+			if (className == nil) {
+				[self emitError:error reason:@"Invalid character" location:_location + _inputStream.currentLocation];
+				return nil;
+			}
+			return classSelector(className);
+		}
+		case LEFT_SQUARE_BRACKET:
+		{
+			return [self parseAttributeSelector:error];
+		}
+		case COLON:
+		{
+			return [self parsePseudoSelector:error];
+		}
+		default:
+		{
+			[self emitError:error reason:@"Invalid character" location:_location + _inputStream.currentLocation];
+			return nil;
+		}
+	}
+}
+
+- (CSSSelector *)parseAttributeSelector:(NSError * __autoreleasing *)error
+{
+	NSString *attribute = [_inputStream consumeIdentifier];
+	if (attribute == nil) {
+		[self emitError:error reason:@"Invalid character" location:_location + _inputStream.currentLocation + 1];
+		return nil;
+	}
+	[_inputStream consumeWhitespace];
+
+	CSSAttributeSelectorType type = CSSAttributeSelectorExists;
+
+	NSString *operator = [_inputStream consumeCharactersInString:@"=~|^$*!"];
+
+	if ([operator isEqualToString:@"="]) {
+		type = CSSAttributeSelectorExactMatch;
+	} else if ([operator isEqualToString:@"~="]) {
+		type = CSSAttributeSelectorIncludes;
+	} else if ([operator isEqualToString:@"|="]) {
+		type = CSSAttributeSelectorHyphen;
+	} else if ([operator isEqualToString:@"^="]) {
+		type = CSSAttributeSelectorBegins;
+	} else if ([operator isEqualToString:@"$="]) {
+		type = CSSAttributeSelectorEnds;
+	} else if ([operator isEqualToString:@"*="]) {
+		type = CSSAttributeSelectorContains;
+	} else if ([operator isEqualToString:@"!="]) {
+		type = CSSAttributeSelectorNot;
+	}
+
+	NSString *value = nil;
+	[_inputStream consumeWhitespace];
+
+	UTF32Char next = _inputStream.nextInputCharacter;
+	if (isQuote(next)) {
+		UTF32Char quote = [_inputStream consumeNextInputCharacter];
+		value =  [_inputStream consumeStringWithEndingCodePoint:quote];
+	} else {
+		value = [_inputStream consumeIdentifier];
+	}
+
+	[_inputStream consumeWhitespace];
+
+	// Consume RIGHT_SQUARE_BRACKET
+	if (![_inputStream consumeCharacter:RIGHT_SQUARE_BRACKET]) {
+		[self emitError:error reason:@"Expected closing right square bracket ']'" location:_location + _inputStream.currentLocation];
+	}
+
+	if (type == CSSAttributeSelectorExists) {
+		return hasAttributeSelector(attribute);
+	}
+
+	return attributeSelector(type, attribute, value);
+}
+
+- (CSSSelector *)parsePseudoSelector:(NSError * __autoreleasing *)error
+{
+	NSString *pseudoClass = [_inputStream consumeIdentifier];
+
+	if ([pseudoClass hasPrefix:@"nth"]) {
+		[_inputStream consumeWhitespace];
+		if (![_inputStream consumeCharacter:LEFT_PARENTHESIS]) {
+			[self emitError:error reason:@"Expected opening left parenthesis '('" location:_location + _inputStream.currentLocation];
+		}
+
+		NSString *functionExpression = [_inputStream consumeCharactersUpToString:@")"];
+		CSSNthExpression expression = [CSSNthExpressionParser parseExpression:functionExpression];
+
+		[_inputStream consumeWhitespace];
+		if (![_inputStream consumeCharacter:RIGHT_PARENTHESIS]) {
+			[self emitError:error reason:@"Expected closing right parenthesis ')'" location:_location + _inputStream.currentLocation];
+		}
+
+		if ([pseudoClass isEqualToString:@"nth-child"]) {
+			return nthChildSelector(expression);
+		} else if ([pseudoClass isEqualToString:@"nth-last-child"]) {
+			return nthLastChildSelector(expression);
+		} else if ([pseudoClass isEqualToString:@"nth-of-type"]) {
+			return nthOfTypeSelector(expression);
+		} else if ([pseudoClass isEqualToString:@"nth-last-of-type"]) {
+			return nthLastOfTypeSelector(expression);
+		}
+	} else if ([pseudoClass isEqualToString:@"not"]) {
+		[_inputStream consumeWhitespace];
+		if (![_inputStream consumeCharacter:LEFT_PARENTHESIS]) {
+			[self emitError:error reason:@"Expected opening left parenthesis '('" location:_location + _inputStream.currentLocation];
+		}
+
+		CSSSelector *subSelector = [self parseSimpleSelector:error];
+		[_inputStream consumeWhitespace];
+		if (![_inputStream consumeCharacter:RIGHT_PARENTHESIS]) {
+			[self emitError:error reason:@"Expected closing right parenthesis ')'" location:_location + _inputStream.currentLocation];
+		}
+
+		return nay(subSelector);
+	} else {
+		if ([pseudoClass isEqualToString:@"even"]) {
+			return evenSlector();
+		} else if ([pseudoClass isEqualToString:@"odd"]) {
+			return oddSelector();
+		} else if ([pseudoClass isEqualToString:@"first-child"]) {
+			return firstChildSelector();
+		} else if ([pseudoClass isEqualToString:@"last-child"]) {
+			return lastChildSelector();
+		} else if ([pseudoClass isEqualToString:@"first-of-type"]) {
+			return firstOfTypeSelector();
+		} else if ([pseudoClass isEqualToString:@"last-of-type"]) {
+			return lastOfTypeSelector();
+		} else if ([pseudoClass isEqualToString:@"only-child"]) {
+			return onlyChildSelector();
+		} else if ([pseudoClass isEqualToString:@"only-of-type"]) {
+			return onlyOfTypeSelector();
+		} else if ([pseudoClass isEqualToString:@"root"]) {
+			return rootSelector();
+		} else if ([pseudoClass isEqualToString:@"empty"]) {
+			return emptySelector();
+		} else if ([pseudoClass isEqualToString:@"link"]) {
+			return linkSelector();
+		} else if ([pseudoClass isEqualToString:@"enabled"]) {
+			return enabledSelector();
+		} else if ([pseudoClass isEqualToString:@"disabled"]) {
+			return disabledSelector();
+		} else if ([pseudoClass isEqualToString:@"checked"]) {
+			return checkedSelector();
+		}
+	}
+	NSString *reason = [NSString stringWithFormat:@"Unknown pseudo class: %@", pseudoClass];
+	[self emitError:error reason:reason location:_location + _inputStream.currentLocation];
+	return nil;
+}
+
+@end

HTMLKit/CSSSelectors.h

@@ -0,0 +1,71 @@
+//
+//  CSSSelectors.h
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelector.h"
+#import "CSSStructuralPseudoSelectors.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+#pragma mark - Type Selectors
+
+extern CSSSelector * universalSelector();
+extern CSSSelector * typeSelector(NSString *type);
+
+#pragma mark - Atribute Selectors
+
+extern CSSSelector * idSelector(NSString *elementId);
+extern CSSSelector * classSelector(NSString *className);
+extern CSSSelector * hasAttributeSelector(NSString *attribute);
+extern CSSSelector * attributeSelector(CSSAttributeSelectorType type,
+												 NSString *attribute,
+												 NSString *value);
+
+#pragma mark - Nth-Expression Selectors
+
+extern CSSSelector * nthChildSelector(CSSNthExpression expression);
+extern CSSSelector * nthLastChildSelector(CSSNthExpression expression);
+extern CSSSelector * nthOfTypeSelector(CSSNthExpression expression);
+extern CSSSelector * nthLastOfTypeSelector(CSSNthExpression expression);
+
+extern CSSSelector * oddSelector();
+extern CSSSelector * evenSlector();
+
+extern CSSSelector * firstChildSelector();
+extern CSSSelector * lastChildSelector();
+extern CSSSelector * firstOfTypeSelector();
+extern CSSSelector * lastOfTypeSelector();
+
+extern CSSSelector * onlyChildSelector();
+extern CSSSelector * onlyOfTypeSelector();
+
+#pragma mark - Combinators
+
+extern CSSSelector * childOfElementSelector(CSSSelector *selector);
+extern CSSSelector * descendantOfElementSelector(CSSSelector *selector);
+extern CSSSelector * adjacentSiblingSelector(CSSSelector *selector);
+extern CSSSelector * generalSiblingSelector(CSSSelector *selector);
+
+#pragma mark - Pseudo Functions
+
+extern CSSSelector * nay(CSSSelector *selector);
+extern CSSSelector * has(CSSSelector *selector);
+
+#pragma mark - Compound Selectors
+
+extern CSSSelector * allOf(NSArray<CSSSelector *> *selectors);
+extern CSSSelector * anyOf(NSArray<CSSSelector *> *selectors);
+
+#pragma mark - Pseudo
+
+extern CSSSelector * namedPseudoSelector(NSString *name, CSSSelector *selector);
+
+#pragma mark - Block
+
+extern CSSSelector * namedBlockSelector(NSString *name, BOOL (^ acceptBlock)(HTMLElement *element));
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSSelectors.m

@@ -0,0 +1,177 @@
+//
+//  CSSSelectors.m
+//  HTMLKit
+//
+//  Created by Iska on 19/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelectors.h"
+#import "CSSTypeSelector.h"
+#import "CSSAttributeSelector.h"
+#import "CSSPseudoClassSelector.h"
+#import "CSSPseudoFunctionSelector.h"
+#import "CSSNthExpressionSelector.h"
+#import "CSSCombinatorSelector.h"
+#import "CSSCompoundSelector.h"
+#import "CSSSelectorBlock.h"
+
+#pragma mark - Type Selectors
+
+CSSSelector * universalSelector()
+{
+	return [CSSTypeSelector universalSelector];
+}
+
+CSSSelector * typeSelector(NSString *type)
+{
+	return [[CSSTypeSelector alloc] initWithType:type];
+}
+
+#pragma mark - Atribute Selectors
+
+CSSSelector * idSelector(NSString *elementId)
+{
+	return [CSSAttributeSelector idSelector:elementId];
+}
+
+CSSSelector * classSelector(NSString *className)
+{
+	return [CSSAttributeSelector classSelector:className];
+}
+
+CSSSelector * hasAttributeSelector(NSString *attribute)
+{
+	return [CSSAttributeSelector hasAttributeSelector:attribute];
+}
+
+CSSSelector * attributeSelector(CSSAttributeSelectorType type,
+												NSString *attribute,
+												NSString *value)
+{
+	return [[CSSAttributeSelector alloc] initWithType:type attributeName:attribute attrbiuteValue:value];
+}
+
+#pragma mark - Nth-Expression Selectors
+
+CSSSelector * nthChildSelector(CSSNthExpression expression)
+{
+	return [CSSNthExpressionSelector nthChildSelector:expression];
+}
+
+CSSSelector * nthLastChildSelector(CSSNthExpression expression)
+{
+	return [CSSNthExpressionSelector nthLastChildSelector:expression];
+}
+
+CSSSelector * nthOfTypeSelector(CSSNthExpression expression)
+{
+	return [CSSNthExpressionSelector nthOfTypeSelector:expression];
+}
+
+CSSSelector * nthLastOfTypeSelector(CSSNthExpression expression)
+{
+	return [CSSNthExpressionSelector nthLastOfTypeSelector:expression];
+}
+
+#pragma mark - Nth-Expression Shorthand
+
+CSSSelector * oddSelector()
+{
+	return namedPseudoSelector(@"odd", nthChildSelector(CSSNthExpressionOdd));
+}
+
+CSSSelector * evenSlector()
+{
+	return namedPseudoSelector(@"even", nthChildSelector(CSSNthExpressionEven));
+}
+
+CSSSelector * firstChildSelector()
+{
+	return namedPseudoSelector(@"first-child", nthChildSelector(CSSNthExpressionMake(0, 1)));
+}
+
+CSSSelector * lastChildSelector()
+{
+	return namedPseudoSelector(@"last-child", nthLastChildSelector(CSSNthExpressionMake(0, 1)));
+}
+
+CSSSelector * firstOfTypeSelector()
+{
+	return namedPseudoSelector(@"first-of-type", nthOfTypeSelector(CSSNthExpressionMake(0, 1)));
+}
+
+CSSSelector * lastOfTypeSelector()
+{
+	return namedPseudoSelector(@"last-of-type", nthLastOfTypeSelector(CSSNthExpressionMake(0, 1)));
+}
+
+CSSSelector * onlyChildSelector()
+{
+	return namedPseudoSelector(@"only-child", allOf(@[firstChildSelector(), lastChildSelector()]));
+}
+
+CSSSelector * onlyOfTypeSelector()
+{
+	return namedPseudoSelector(@"only-of-type", allOf(@[firstOfTypeSelector(), lastOfTypeSelector()]));
+}
+
+#pragma mark - Combinators
+
+CSSSelector * childOfElementSelector(CSSSelector *selector)
+{
+	return [CSSCombinatorSelector childOfElementCombinator:selector];
+}
+
+CSSSelector * descendantOfElementSelector(CSSSelector *selector)
+{
+	return [CSSCombinatorSelector descendantOfElementCombinator:selector];
+}
+
+CSSSelector * adjacentSiblingSelector(CSSSelector *selector)
+{
+	return [CSSCombinatorSelector adjacentSiblingCombinator:selector];
+}
+
+CSSSelector * generalSiblingSelector(CSSSelector *selector)
+{
+	return [CSSCombinatorSelector generalSiblingCombinator:selector];
+}
+
+#pragma mark - Pseudo Functions
+
+CSSSelector * nay(CSSSelector *selector)
+{
+	return [CSSPseudoFunctionSelector notSelector:selector];
+}
+
+CSSSelector * has(CSSSelector *selector)
+{
+	return [CSSPseudoFunctionSelector hasSelector:selector];
+}
+
+#pragma mark - Compound Selectors
+
+CSSSelector * allOf( NSArray<CSSSelector *> * selectors)
+{
+	return [CSSCompoundSelector andSelector:selectors];
+}
+
+CSSSelector * anyOf( NSArray<CSSSelector *> * selectors)
+{
+	return [CSSCompoundSelector orSelector:selectors];
+}
+
+#pragma mark - Pseudo
+
+CSSSelector * namedPseudoSelector(NSString *name, CSSSelector *selector)
+{
+	return [[CSSPseudoClassSelector alloc] initWithClassName:name selector:selector];
+}
+
+#pragma mark - Block
+
+CSSSelector * namedBlockSelector(NSString *name, BOOL (^ acceptBlock)(HTMLElement *element))
+{
+	return [[CSSSelectorBlock alloc] initWithName:name block:acceptBlock];
+}

HTMLKit/CSSStructuralPseudoSelectors.h

@@ -0,0 +1,40 @@
+//
+//  CSSStructuralPseudoSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 11/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+@class CSSSelector;
+
+NS_ASSUME_NONNULL_BEGIN
+
+extern CSSSelector * rootSelector();
+extern CSSSelector * emptySelector();
+extern CSSSelector * parentSelector();
+
+extern CSSSelector * buttonSelector();
+extern CSSSelector * checkboxSelector();
+extern CSSSelector * fileSelector();
+extern CSSSelector * headerSelector();
+extern CSSSelector * imageSelector();
+extern CSSSelector * inputSelector();
+extern CSSSelector * linkSelector();
+extern CSSSelector * passwordSelector();
+extern CSSSelector * radioSelector();
+extern CSSSelector * resetSelector();
+extern CSSSelector * submitSelector();
+extern CSSSelector * textSelector();
+
+extern CSSSelector * enabledSelector();
+extern CSSSelector * disabledSelector();
+extern CSSSelector * checkedSelector();
+extern CSSSelector * optionalSelector();
+extern CSSSelector * requiredSelector();
+
+extern CSSSelector * ltSelector();
+extern CSSSelector * gtSelector();
+extern CSSSelector * eqSelector();
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSStructuralPseudoSelectors.m

@@ -0,0 +1,301 @@
+//
+//  CSSStructuralPseudoSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 11/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSStructuralPseudoSelectors.h"
+#import "CSSSelectors.h"
+#import "HTMLElement.h"
+#import "NSString+HTMLKit.h"
+
+#pragma mark - Elements
+
+CSSSelector * rootSelector()
+{
+	return namedBlockSelector(@":root", ^BOOL(HTMLElement * element) {
+		return element.parentElement == nil;
+	});
+}
+
+CSSSelector * emptySelector()
+{
+	return namedBlockSelector(@":empty", ^BOOL(HTMLElement * element) {
+		for (HTMLNode *child in element.childNodes) {
+			if (child.nodeType == HTMLNodeElement) {
+				return NO;
+			} else if (child.nodeType == HTMLNodeText && child.textContent.length > 0) {
+				return NO;
+			}
+		}
+		return YES;
+	});
+}
+
+CSSSelector * parentSelector()
+{
+	return namedBlockSelector(@":parent", ^BOOL(HTMLElement * element) {
+		return element.childNodesCount > 0;
+	});
+}
+
+CSSSelector * buttonSelector()
+{
+	return namedBlockSelector(@":button", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element.tagName isEqualToString:@"button"]) {
+			return YES;
+		}
+		if ([element.tagName isEqualToString:@"input"] && [element[@"type"] isEqualToString:@"button"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * checkboxSelector()
+{
+	return namedBlockSelector(@":checkbox", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"checkbox"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * fileSelector()
+{
+	return namedBlockSelector(@":file", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"file"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * headerSelector()
+{
+	return namedBlockSelector(@":header", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element.tagName isEqualToAny:@"h1", @"h2", @"h3", @"h4", @"h5", @"h6", nil]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * imageSelector()
+{
+	return namedBlockSelector(@":image", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"image"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * inputSelector()
+{
+	return namedBlockSelector(@":input", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element.tagName isEqualToAny:@"button", @"input", @"select", @"textarea", nil]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * linkSelector()
+{
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-link
+	return namedBlockSelector(@":link", ^BOOL(HTMLElement * element) {
+		if ([element hasAttribute:@"href"]) {
+			return [element.tagName isEqualToAny:@"a", @"area", @"link", nil];
+		}
+		return NO;
+	});
+}
+
+CSSSelector * passwordSelector()
+{
+	return namedBlockSelector(@":password", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"password"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * radioSelector()
+{
+	return namedBlockSelector(@":radio", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"radio"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * resetSelector()
+{
+	return namedBlockSelector(@":reset", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"reset"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * submitSelector()
+{
+	return namedBlockSelector(@":submit", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element.tagName isEqualToString:@"input"] && [element[@"type"] isEqualToString:@"submit"]) {
+			return YES;
+		}
+		if ([element.tagName isEqualToString:@"button"] && [element[@"type"] isEqualToString:@"submit"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+CSSSelector * textSelector()
+{
+	return namedBlockSelector(@":text", ^BOOL(HTMLElement * _Nonnull element) {
+		if ([element[@"type"] isEqualToString:@"text"]) {
+			return YES;
+		}
+		return NO;
+	});
+}
+
+#pragma mark - State
+
+CSSSelector * enabledSelector()
+{
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled
+	CSSSelector *candiate = anyOf(@[
+									typeSelector(@"button"),
+									typeSelector(@"input"),
+									typeSelector(@"select"),
+									typeSelector(@"textarea"),
+									typeSelector(@"optgroup"),
+									typeSelector(@"option"),
+									typeSelector(@"menuitem"),
+									typeSelector(@"fieldset"),
+									]);
+	return namedPseudoSelector(@"enabled", allOf(@[candiate, nay(disabledSelector())]));
+}
+
+CSSSelector * disabledSelector()
+{
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled
+	CSSSelector *disabledAttribute = hasAttributeSelector(@"disabled");
+
+	// https://html.spec.whatwg.org/multipage/forms.html#concept-fieldset-disabled
+	CSSSelector *disabledFieldset = allOf(@[typeSelector(@"fieldset"), disabledAttribute]);
+	CSSSelector *firstLegend = allOf(@[typeSelector(@"legend"), firstOfTypeSelector()]);
+	CSSSelector *firstLegendDecendantDisabledFieldSet = allOf(@[firstLegend, descendantOfElementSelector(disabledFieldset)]);
+
+	// https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled
+	CSSSelector *disabledForm = anyOf(@[
+										anyOf(@[
+												allOf(@[typeSelector(@"button"), disabledAttribute]),
+												allOf(@[typeSelector(@"input"), disabledAttribute]),
+												allOf(@[typeSelector(@"select"), disabledAttribute]),
+												allOf(@[typeSelector(@"textarea"), disabledAttribute])
+												]),
+										allOf(@[
+												descendantOfElementSelector(disabledFieldset),
+												nay(firstLegendDecendantDisabledFieldSet)
+												])
+										]);
+
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled
+	CSSSelector *disabledMenuItem = allOf(@[typeSelector(@"menuitem"), disabledAttribute]);
+	CSSSelector *disabledOptgroup = allOf(@[typeSelector(@"optgroup"), disabledAttribute]);
+
+	// https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled
+	CSSSelector *disabledOption = allOf(@[
+										  typeSelector(@"option"),
+										  anyOf(@[
+												  disabledAttribute,
+												  descendantOfElementSelector(disabledOptgroup)])
+										  ]);
+	return namedPseudoSelector(@"disabled",
+							   anyOf(@[disabledOption, disabledOptgroup, disabledMenuItem, disabledForm, disabledFieldset]));
+}
+
+CSSSelector * checkedSelector()
+{
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-checked
+	CSSSelector *candidate = anyOf(@[
+									 typeSelector(@"input"),
+									 typeSelector(@"option"),
+									 typeSelector(@"menutitem")
+									 ]);
+	CSSSelector *hasAttribute = anyOf(@[
+										hasAttributeSelector(@"checked"),
+										hasAttributeSelector(@"selected")
+										]);
+
+	return namedPseudoSelector(@"checked", allOf(@[candidate, hasAttribute]));
+}
+
+CSSSelector * optionalSelector()
+{
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-optional
+	CSSSelector *candidate = anyOf(@[
+									 typeSelector(@"input"),
+									 typeSelector(@"select"),
+									 typeSelector(@"textarea")
+									 ]);
+	CSSSelector *noAttribute = nay(hasAttributeSelector(@"required"));
+
+	return namedPseudoSelector(@"optional", allOf(@[candidate, noAttribute]));
+}
+
+CSSSelector * requiredSelector()
+{
+	// https://html.spec.whatwg.org/multipage/scripting.html#selector-required
+	// https://html.spec.whatwg.org/multipage/forms.html#concept-input-required
+	CSSSelector *candidate = anyOf(@[
+									 typeSelector(@"input"),
+									 typeSelector(@"select"),
+									 typeSelector(@"textarea")
+									 ]);
+	CSSSelector *hasAttribute = hasAttributeSelector(@"required");
+
+	return namedPseudoSelector(@"required", allOf(@[candidate, hasAttribute]));
+}
+
+#pragma mark - Positional
+
+CSSSelector * ltSelector(NSUInteger index)
+{
+	NSString *name = [NSString stringWithFormat:@":lt(%lu)", (unsigned long)index];
+	return namedBlockSelector(name, ^BOOL(HTMLElement * _Nonnull element) {
+		return [element.parentElement indexOfChildNode:element] < index;
+	});
+}
+
+CSSSelector * gtSelector(NSUInteger index)
+{
+	NSString *name = [NSString stringWithFormat:@":gt(%lu)", (unsigned long)index];
+	return namedBlockSelector(name, ^BOOL(HTMLElement * _Nonnull element) {
+		return [element.parentElement indexOfChildNode:element] > index;
+	});
+}
+
+CSSSelector * eqSelector(NSInteger index)
+{
+	NSString *name = [NSString stringWithFormat:@":eq(%lu)", (unsigned long)index];
+	return namedBlockSelector(name, ^BOOL(HTMLElement * _Nonnull element) {
+		NSUInteger elementIndex = [element.parentElement indexOfChildNode:element];
+
+		if (index > 0) {
+			return elementIndex == index;
+		} else {
+			return elementIndex == element.parentElement.childNodesCount - index - 1;
+		}
+	});
+}

HTMLKit/CSSTypeSelector.h

@@ -0,0 +1,24 @@
+//
+//  CSSTypeSelector.h
+//  HTMLKit
+//
+//  Created by Iska on 13/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "CSSSelector.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface CSSTypeSelector : CSSSelector
+
+@property (nonatomic, strong, readonly) NSString *type;
+
++ (instancetype)universalSelector;
+
+- (instancetype)initWithType:(NSString *)type;
+
+@end
+
+NS_ASSUME_NONNULL_END

HTMLKit/CSSTypeSelector.m

@@ -0,0 +1,50 @@
+//
+//  CSSTypeSelector.m
+//  HTMLKit
+//
+//  Created by Iska on 13/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSTypeSelector.h"
+#import "HTMLElement.h"
+#import "NSString+HTMLKit.h"
+
+@interface CSSTypeSelector ()
+{
+	NSString *_type;
+}
+@end
+
+@implementation CSSTypeSelector
+
++ (instancetype)universalSelector
+{
+	return [[self alloc] initWithType:@"*"];
+}
+
+- (instancetype)initWithType:(NSString *)type
+{
+	self = [super init];
+	if (self) {
+		_type = [type copy];
+	}
+	return self;
+}
+
+- (BOOL)acceptElement:(HTMLElement *)element
+{
+	if ([_type isEqualToString:@"*"] || [_type isEqualToStringIgnoringCase:element.tagName]) {
+		return YES;
+	}
+	return NO;
+}
+
+#pragma mark - Description
+
+- (NSString *)debugDescription
+{
+	return self.type;
+}
+
+@end

HTMLKit/HTMLDocumentFragment.m

@@ -32,7 +32,7 @@
 - (NSString *)textContent
 {
 	NSMutableString *content = [NSMutableString string];
-	for (HTMLNode *node in self.treeEnumerator) {
+	for (HTMLNode *node in self.nodeIterator) {
 		if (node.nodeType == HTMLNodeText) {
 			[content appendString:[(HTMLText *)node data]];
 		}

HTMLKit/HTMLElement.m

@@ -180,4 +180,9 @@
 	return description;
 }
 
+- (NSString *)debugDescription
+{
+	return self.description;
+}
+
 @end

HTMLKit/HTMLInputStreamReader.h

@@ -24,6 +24,7 @@ typedef void (^ HTMLStreamReaderErrorCallback)(NSString *reason);
 
 - (UTF32Char)currentInputCharacter;
 - (UTF32Char)nextInputCharacter;
+- (UTF32Char)inputCharacterPointAtOffset:(NSUInteger)offset;
 
 - (UTF32Char)consumeNextInputCharacter;
 - (void)reconsumeCurrentInputCharacter;
@@ -35,6 +36,7 @@ typedef void (^ HTMLStreamReaderErrorCallback)(NSString *reason);
 - (BOOL)consumeString:(NSString *)string caseSensitive:(BOOL)caseSensitive;
 - (NSString *)consumeCharactersUpToCharactersInString:(NSString *)characters;
 - (NSString *)consumeCharactersUpToString:(NSString *)string;
+- (NSString *)consumeCharactersInString:(NSString *)characters;
 - (NSString *)consumeAlphanumericCharacters;
 
 - (void)markCurrentLocation;

HTMLKit/HTMLInputStreamReader.m

@@ -8,6 +8,7 @@
 
 #import "HTMLInputStreamReader.h"
 #import "HTMLTokenizerCharacters.h"
+#import "NSCharacterSet+HTMLKit.h"
 
 #pragma mark - HTMLInputStreamReader
 
@@ -39,6 +40,7 @@
 	if (self) {
 		_string = [string copy];
 		_scanner = [[NSScanner alloc] initWithString:string];
+		_scanner.charactersToBeSkipped = nil;
 		CFStringInitInlineBuffer((CFStringRef)_string, &_buffer, CFRangeMake(0, _string.length));
 	}
 	return self;
@@ -63,7 +65,6 @@
 - (UTF32Char)nextInputCharacter
 {
 	if (_reconsume) {
-		_reconsume = NO;
 		return _currentInputCharacter;
 	}
 
@@ -106,6 +107,11 @@
 	return nextInputCharacter;
 }
 
+- (UTF32Char)inputCharacterPointAtOffset:(NSUInteger)offset
+{
+	return CFStringGetCharacterFromInlineBuffer(&_buffer, _location + offset);
+}
+
 - (UTF32Char)consumeNextInputCharacter
 {
 	if (_reconsume) {
@@ -124,9 +130,12 @@
 {
 	UTF32Char nextInputCharacter = [self nextInputCharacter];
 	if (nextInputCharacter == character) {
-		_location += _consume;
-		_scanner.scanLocation = _location;
-		_currentInputCharacter = nextInputCharacter;
+		if (!_reconsume) {
+			_location += _consume;
+			_scanner.scanLocation = _location;
+			_currentInputCharacter = nextInputCharacter;
+		}
+		_reconsume = NO;
 		return YES;
 	}
 	return NO;
@@ -145,7 +154,7 @@
 
 - (BOOL)consumeHexNumber:(unsigned long long *)result
 {
-	NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"0123456789ABCDEFabcdef"];
+	NSCharacterSet *set = [NSCharacterSet HTMLHexNumberCharacterSet];
 
 	NSString *string = nil;
 	BOOL success = [_scanner scanCharactersFromSet:set intoString:&string];
@@ -193,6 +202,26 @@
 	return consumed;
 }
 
+- (NSString *)consumeCharactersInString:(NSString *)characters
+{
+	NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:characters];
+
+	if (_reconsume) {
+		_scanner.scanLocation--;
+	}
+
+	NSString *string = nil;
+	BOOL success = [_scanner scanCharactersFromSet:set intoString:&string];
+	if (success == NO) {
+		_scanner.scanLocation++;
+		return nil;
+	}
+
+	_reconsume = NO;
+	_location = _scanner.scanLocation;
+	return string;
+}
+
 - (NSString *)consumeAlphanumericCharacters
 {
 	NSCharacterSet *set = [NSCharacterSet alphanumericCharacterSet];

HTMLKit/HTMLKit.h

@@ -6,8 +6,7 @@
 //  Copyright (c) 2014 BrainCookie. All rights reserved.
 //
 
-#import <Foundation/Foundation.h>
-
-@interface HTMLKit : NSObject
-
-@end
+#import "HTMLParser.h"
+#import "HTMLDOM.h"
+#import "CSSSelectors.h"
+#import "HTMLKitErrorDomain.h"

HTMLKit/HTMLKit.m

@@ -1,13 +0,0 @@
-//
-//  HTMLKit.m
-//  HTMLKit
-//
-//  Created by Iska on 15/09/14.
-//  Copyright (c) 2014 BrainCookie. All rights reserved.
-//
-
-#import "HTMLKit.h"
-
-@implementation HTMLKit
-
-@end

HTMLKit/HTMLKitErrorDomain.h

@@ -0,0 +1,23 @@
+//
+//  HTMLKitErrorDomain.h
+//  HTMLKit
+//
+//  Created by Iska on 24/11/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#ifndef HTMLKitErrorDomain_h
+#define HTMLKitErrorDomain_h
+
+static NSString *const HTMLKitErrorDomain = @"HTMLKit";
+static NSString *const HTMLKitSelectorErrorDomain = @"HTMLKitSelector";
+
+static NSString *const CSSSelectorStringKey = @"CSSSelectorString";
+static NSString *const CSSSelectorErrorLocationKey = @"CSSSelectorErrorLocation";
+
+NS_ENUM(NSInteger)
+{
+	HTMLKitSelectorParseError = 4200
+};
+
+#endif /* HTMLKitErrorDomain_h */

HTMLKit/HTMLNode.h

@@ -38,6 +38,7 @@ typedef NS_ENUM(unsigned short, HTMLDocumentPosition)
 
 @class HTMLDocument;
 @class HTMLElement;
+@class CSSSelector;
 
 @interface HTMLNode : NSObject <NSCopying>
 
@@ -61,6 +62,10 @@ typedef NS_ENUM(unsigned short, HTMLDocumentPosition)
 
 @property (nonatomic, strong, readonly) HTMLNode *nextSibling;
 
+@property (nonatomic, strong, readonly) HTMLElement *previousSiblingElement;
+
+@property (nonatomic, strong, readonly) HTMLElement *nextSiblingElement;
+
 @property (nonatomic, copy) NSString *textContent;
 
 @property (nonatomic, strong, readonly)	NSString *outerHTML;
@@ -83,6 +88,12 @@ typedef NS_ENUM(unsigned short, HTMLDocumentPosition)
 
 - (NSUInteger)indexOfChildNode:(HTMLNode *)node;
 
+- (NSUInteger)childElementsCount;
+
+- (HTMLElement *)childElementAtIndex:(NSUInteger)index;
+
+- (NSUInteger)indexOfChildElement:(HTMLElement *)element;
+
 - (HTMLNode *)prependNode:(HTMLNode *)node;
 
 - (void)prependNodes:(NSArray *)nodes;
@@ -121,6 +132,9 @@ typedef NS_ENUM(unsigned short, HTMLDocumentPosition)
 - (HTMLNodeIterator *)nodeIteratorWithShowOptions:(HTMLNodeFilterShowOptions)showOptions
 									  filterBlock:(HTMLNodeFilterValue (^)(HTMLNode *node))filter;
 
+- (HTMLElement *)firstElementMatchingSelector:(CSSSelector *)selector;
+- (NSArray<HTMLElement *> *)elementsMatchingSelector:(CSSSelector *)selector;
+
 - (NSString *)treeDescription;
 
 @end

HTMLKit/HTMLNode.m

@@ -13,6 +13,7 @@
 #import "HTMLText.h"
 #import "HTMLComment.h"
 #import "HTMLKitDOMExceptions.h"
+#import "CSSSelector.h"
 
 @interface HTMLDocument (Private)
 - (void)runRemovingStepsForNode:(HTMLNode *)oldNode
@@ -98,6 +99,24 @@
 	return [_parentNode childNodeAtIndex:index + 1];
 }
 
+- (HTMLElement *)previousSiblingElement
+{
+	HTMLNode *node = self.previousSibling;
+	while (node && node.nodeType != HTMLNodeElement) {
+		node = node.previousSibling;
+	}
+	return node.asElement;
+}
+
+- (HTMLElement *)nextSiblingElement
+{
+	HTMLNode *node = self.previousSibling;
+	while (node && node.nodeType != HTMLNodeElement) {
+		node = node.nextSibling;
+	}
+	return node.asElement;
+}
+
 - (NSString *)textContent
 {
 	return nil;
@@ -140,11 +159,46 @@
 	return [self.childNodes objectAtIndex:index];
 }
 
+- (NSUInteger)childElementsCount
+{
+	return [self.childNodes indexesOfObjectsPassingTest:^BOOL(HTMLNode *  _Nonnull node, NSUInteger idx, BOOL * _Nonnull stop) {
+		return node.nodeType == HTMLNodeElement;
+	}].count;
+}
+
 - (NSUInteger)indexOfChildNode:(HTMLNode *)node
 {
 	return [self.childNodes indexOfObject:node];
 }
 
+- (HTMLElement *)childElementAtIndex:(NSUInteger)index
+{
+	NSUInteger counter = 0;
+	for (HTMLNode *node in self.childNodes) {
+		if (node.nodeType == HTMLNodeElement) {
+			if (counter == index) {
+				return node.asElement;
+			}
+			counter++;
+		}
+	}
+	return nil;
+}
+
+- (NSUInteger)indexOfChildElement:(HTMLElement *)element
+{
+	NSUInteger counter = 0;
+	for (HTMLNode *node in self.childNodes) {
+		if (node.nodeType == HTMLNodeElement) {
+			if (node == element) {
+				return counter;
+			}
+			counter++;
+		}
+	}
+	return NSNotFound;
+}
+
 - (HTMLNode *)prependNode:(HTMLNode *)node
 {
 	return [self insertNode:node beforeChildNode:self.firstChild];
@@ -386,6 +440,29 @@
 	return [HTMLNodeIterator iteratorWithNode:self showOptions:showOptions filter:filter];
 }
 
+#pragma mark - Selectors
+
+- (HTMLElement *)firstElementMatchingSelector:(CSSSelector *)selector
+{
+	for (HTMLElement *element in [self nodeIteratorWithShowOptions:HTMLNodeFilterShowElement filter:nil]) {
+		if ([selector acceptElement:element]) {
+			return element;
+		}
+	}
+	return nil;
+}
+
+- (NSArray<HTMLElement *> *)elementsMatchingSelector:(CSSSelector *)selector
+{
+	NSMutableArray *result = [NSMutableArray array];
+	for (HTMLElement *element in [self nodeIteratorWithShowOptions:HTMLNodeFilterShowElement filter:nil]) {
+		if ([selector acceptElement:element]) {
+			[result addObject:element];
+		}
+	}
+	return result;
+}
+
 #ifndef HTMLKIT_NO_DOM_CHECKS
 
 #pragma mark - Validity Checks
@@ -610,12 +687,7 @@ NS_INLINE void CheckInvalidCombination(HTMLNode *parent, HTMLNode *node, NSStrin
 
 - (NSString *)description
 {
-	return [NSString stringWithFormat:@"<%@: %p %@>", self.class, self, self.name];
-}
-
-- (NSString *)debugDescription
-{
-	return self.treeDescription;
+	return [NSString stringWithFormat:@"<%@: %p '%@'>", self.class, self, self.name];
 }
 
 - (id)debugQuickLookObject

HTMLKit/HTMLNodeFilter.h

@@ -26,6 +26,9 @@ typedef NS_OPTIONS(unsigned long, HTMLNodeFilterShowOptions)
 	HTMLNodeFilterShowDocumentFragment = 0x400
 };
 
+
+#pragma mark - Node Filter
+
 @class HTMLNode;
 
 @protocol HTMLNodeFilter <NSObject>
@@ -34,8 +37,20 @@ typedef NS_OPTIONS(unsigned long, HTMLNodeFilterShowOptions)
 
 @end
 
+#pragma mark - Block Filter
+
 @interface HTMLNodeFilterBlock : NSObject <HTMLNodeFilter>
 
 + (instancetype)filterWithBlock:(HTMLNodeFilterValue (^)(HTMLNode *node))block;
 
 @end
+
+#pragma mark - CSS Selector Filter
+
+@class CSSSelector;
+
+@interface HTMLSelectorNodeFilter : NSObject <HTMLNodeFilter>
+
++ (instancetype)filterWithSelector:(CSSSelector *)selector;
+
+@end

HTMLKit/HTMLNodeFilter.m

@@ -7,6 +7,10 @@
 //
 
 #import "HTMLNodeFilter.h"
+#import "HTMLNode.h"
+#import "CSSSelector.h"
+
+#pragma mark - Block Filter
 
 @interface HTMLNodeFilterBlock ()
 {
@@ -40,3 +44,42 @@
 }
 
 @end
+
+#pragma mark - CSS Selector Filter
+
+@interface HTMLSelectorNodeFilter ()
+{
+	CSSSelector *_selector;
+}
+@end
+
+@implementation HTMLSelectorNodeFilter
+
++ (instancetype)filterWithSelector:(CSSSelector *)selector
+{
+	return [[self alloc] initWithSelector:selector];
+}
+
+- (instancetype)initWithSelector:(CSSSelector *)selector
+{
+	self = [super init];
+	if (self) {
+		_selector = selector;
+	}
+	return self;
+}
+
+- (HTMLNodeFilterValue)acceptNode:(HTMLNode *)node
+{
+	if (node.nodeType != HTMLNodeElement) {
+		return HTMLNodeFilterSkip;
+	}
+
+	if ([_selector acceptElement:node.asElement]) {
+		return HTMLNodeFilterAccept;
+	}
+
+	return HTMLNodeFilterSkip;
+}
+
+@end

HTMLKit/HTMLOrderedDictionary.h

@@ -8,18 +8,22 @@
 
 #import <Foundation/Foundation.h>
 
-@interface HTMLOrderedDictionary : NSMutableDictionary
+NS_ASSUME_NONNULL_BEGIN
 
-- (id)objectAtIndex:(NSUInteger)index;
-- (void)setObject:(id)anObject forKey:(id<NSCopying>)aKey atIndex:(NSUInteger)index;
+@interface HTMLOrderedDictionary<KeyType, ObjectType> : NSMutableDictionary<KeyType, ObjectType>
+
+- (ObjectType)objectAtIndex:(NSUInteger)index;
+- (void)setObject:(ObjectType)anObject forKey:(KeyType<NSCopying>)aKey atIndex:(NSUInteger)index;
 - (void)removeObjectAtIndex:(NSUInteger)index;
-- (void)replaceKeyValueAtIndex:(NSUInteger)index withObject:(id)anObject andKey:(id<NSCopying>)aKey;
-- (void)replaceKey:(id<NSCopying>)aKey withKey:(id<NSCopying>)newKey;
-- (NSUInteger)indexOfKey:(id<NSCopying>)aKey;
+- (void)replaceKeyValueAtIndex:(NSUInteger)index withObject:(ObjectType)anObject andKey:(KeyType<NSCopying>)aKey;
+- (void)replaceKey:(KeyType<NSCopying>)aKey withKey:(KeyType<NSCopying>)newKey;
+- (NSUInteger)indexOfKey:(KeyType<NSCopying>)aKey;
 
-- (id)objectAtIndexedSubscript:(NSUInteger)index;
-- (void)setObject:(id)obj atIndexedSubscript:(NSUInteger)index;
+- (ObjectType)objectAtIndexedSubscript:(NSUInteger)index;
+- (void)setObject:(ObjectType)obj atIndexedSubscript:(NSUInteger)index;
 
 - (NSEnumerator *)reverseKeyEnumerator;
 
 @end
+
+NS_ASSUME_NONNULL_END

HTMLKit/NSCharacterSet+HTMLKit.h

@@ -0,0 +1,17 @@
+//
+//  NSCharacterSet+HTMLKit.h
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface NSCharacterSet (HTMLKit)
+
++ (instancetype)HTMLWhitespaceCharacterSet;
++ (instancetype)HTMLHexNumberCharacterSet;
++ (instancetype)CSSNthExpressionCharacterSet;
+
+@end

HTMLKit/NSCharacterSet+HTMLKit.m

@@ -0,0 +1,43 @@
+//
+//  NSCharacterSet+HTMLKit.m
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import "NSCharacterSet+HTMLKit.h"
+
+@implementation NSCharacterSet (HTMLKit)
+
++ (instancetype)HTMLWhitespaceCharacterSet
+{
+	static NSCharacterSet *set = nil;
+	static dispatch_once_t onceToken;
+	dispatch_once(&onceToken, ^{
+		set = [NSCharacterSet characterSetWithCharactersInString:@" \t\n\r\f"];
+	});
+	return set;
+}
+
++ (instancetype)HTMLHexNumberCharacterSet
+{
+	static NSCharacterSet *set = nil;
+	static dispatch_once_t onceToken;
+	dispatch_once(&onceToken, ^{
+		set = [NSCharacterSet characterSetWithCharactersInString:@"0123456789ABCDEFabcdef"];
+	});
+	return set;
+}
+
++ (instancetype)CSSNthExpressionCharacterSet
+{
+	static NSCharacterSet *set = nil;
+	static dispatch_once_t onceToken;
+	dispatch_once(&onceToken, ^{
+		set = [NSCharacterSet characterSetWithCharactersInString:@" 0123456789nN-+"];
+	});
+	return set;
+}
+
+@end

HTMLKitTests/CSSAttributeSelectorTests.m

@@ -0,0 +1,238 @@
+//
+//  CSSAttributeSelectorTests.m
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+#import "CSSSelectors.h"
+#import "HTMLDOM.h"
+
+@interface CSSAttributeSelectorTests : XCTestCase
+{
+	HTMLElement *_element;
+}
+@end
+
+@implementation CSSAttributeSelectorTests
+
+- (void)setUp
+{
+	[super setUp];
+	_element = [[HTMLElement alloc] initWithTagName:@"div"];
+}
+
+- (void)testAttributeExists
+{
+	CSSSelector *selector = hasAttributeSelector(@"attr");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"value 2";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"value 3";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeExactMatch
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorExactMatch, @"attr", @"value");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value 1";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value 2";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value 3";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeIncludes
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorIncludes, @"attr", @"value");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"a b value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"a value b";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeBegins
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorBegins, @"attr", @"value");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"val";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"a value";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"values";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeEnds
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorEnds, @"attr", @"value");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"val";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"a value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"some-value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeContains
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorContains, @"attr", @"value");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"val";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"a value b";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"some-values";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeHyphen
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorHyphen, @"attr", @"top");
+
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"top_text";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"toptext";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+
+	_element[@"attr"] = @"top";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"top-text";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testAttributeNot
+{
+	CSSSelector *selector = attributeSelector(CSSAttributeSelectorNot, @"attr", @"value");
+
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"class"] = @"class";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"top_text";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"toptext";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"top";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"top-text";
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	[_element.attributes removeObjectForKey:@"attr"];
+	XCTAssertEqual([selector acceptElement:_element], YES);
+
+	_element[@"attr"] = @"value";
+	XCTAssertEqual([selector acceptElement:_element], NO);
+}
+
+- (void)testIdSelector
+{
+	_element[@"id"] = @"id";
+	XCTAssertEqual([idSelector(@"id") acceptElement:_element], YES);
+	XCTAssertEqual([idSelector(@"other id") acceptElement:_element], NO);
+}
+
+- (void)testClassSelector
+{
+	_element[@"class"] = @"class";
+	XCTAssertEqual([classSelector(@"class") acceptElement:_element], YES);
+	XCTAssertEqual([classSelector(@"other class") acceptElement:_element], NO);
+}
+
+@end

HTMLKitTests/CSSCombinatorSelectorTests.m

@@ -0,0 +1,116 @@
+//
+//  CSSCombinatorSelectorTests.m
+//  HTMLKit
+//
+//  Created by Iska on 23/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+#import "CSSSelectors.h"
+#import "HTMLParser.h"
+#import "HTMLDOM.h"
+
+@interface CSSCombinatorSelectorTests : XCTestCase
+{
+	HTMLDocument *_document;
+}
+@end
+
+@implementation CSSCombinatorSelectorTests
+
+- (void)setUp
+{
+    [super setUp];
+
+	/*
+	 |  <body>
+	 |    <p id='p1'>
+	 |      A paragraph<span id='span1'>A span</span>
+	 |      <table id='table'>
+	 |        <tbody id='tbody'>
+	 |          <tr id='tr1'>
+	 |            <td id='td'>
+	 |              <span id='span2'>Span in table</span>
+	 |            </td>
+	 |          </tr>
+	 |          <tr id='tr2'></tr>
+	 |          <tr id='tr3'></tr>
+	 |        </tbody>
+	 |      </table>
+	 |    </p>
+	 |    <div id='inner-div1'>
+     |      <p id='p2'></p>
+	 |    </div>
+	 |    <div id='inner-div2'>
+	 |      <p id='p3'></p>
+	 |    </div>
+	 |  </body>
+	 */
+	_document = [[[HTMLParser alloc] initWithString:@"<body>"
+				  "<p id='p1'>"
+				  "A paragraph<span id='span1'>A span</span>"
+				  "<table id='table'>"
+				  "<tbody id='tbody'>"
+				  "<tr id='tr1'><td id='td'>"
+				  "<span id='span2'>Span in table</span>"
+				  "</td></tr>"
+				  "<tr id='tr2'></tr>"
+				  "<tr id='tr3'></tr>"
+				  "</tbody>"
+				  "</table>"
+				  "</p>"
+				  "<div id='inner-div1'>"
+				  "<p id='p2'></p>"
+				  "</div>"
+				  "<div id='inner-div2'>"
+				  "<p id='p3'></p>"
+				  "</div>"
+				  "</body>"] document];
+}
+
+-(void)testChildOfElementCombinator
+{
+	NSArray *elements = [_document elementsMatchingSelector:childOfElementSelector(typeSelector(@"body"))];
+	NSArray *expected = @[@"p1", @"inner-div1", @"inner-div2"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_document elementsMatchingSelector:childOfElementSelector(typeSelector(@"p"))];
+	expected = @[@"span1", @"table"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+-(void)testDescendantOfElementCombinator
+{
+	NSArray *elements = [_document elementsMatchingSelector:descendantOfElementSelector(typeSelector(@"p"))];
+	NSArray *expected = @[@"span1", @"table", @"tbody", @"tr1", @"td", @"span2", @"tr2", @"tr3"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_document elementsMatchingSelector:descendantOfElementSelector(typeSelector(@"table"))];
+	expected = @[@"tbody", @"tr1", @"td", @"span2", @"tr2", @"tr3"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+-(void)testAdjacentSiblingCombinator
+{
+	NSArray *elements = [_document elementsMatchingSelector:adjacentSiblingSelector(typeSelector(@"tr"))];
+	NSArray *expected = @[@"tr2", @"tr3"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_document elementsMatchingSelector:adjacentSiblingSelector(typeSelector(@"p"))];
+	expected = @[@"inner-div1"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+-(void)testGeneralSiblingCombinator
+{
+	NSArray *elements = [_document elementsMatchingSelector:generalSiblingSelector(typeSelector(@"tr"))];
+	NSArray *expected = @[@"tr2", @"tr3"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_document elementsMatchingSelector:generalSiblingSelector(typeSelector(@"p"))];
+	expected = @[@"inner-div1", @"inner-div2"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+@end

HTMLKitTests/CSSNThExpressionSelectorTests.m

@@ -0,0 +1,352 @@
+//
+//  CSSNThExpressionSelectorTests.m
+//  HTMLKit
+//
+//  Created by Iska on 21/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+#import "CSSSelectors.h"
+#import "HTMLParser.h"
+#import "HTMLDOM.h"
+
+@interface CSSNThExpressionSelectorTests : XCTestCase
+{
+	HTMLDocument *_childTree;
+	HTMLDocument *_typeTree;
+}
+@end
+
+@implementation CSSNThExpressionSelectorTests
+
+- (void)setUp
+{
+	[super setUp];
+
+	/*
+	 |  <div>
+	 |    <table>
+	 |      <tr id='11'><td>11</td></tr>
+	 |      <tr id='12'><td>12</td></tr>
+	 |      <tr id='13'><td>13</td></tr>
+	 |      <tr id='14'><td>14</td></tr>
+	 |    </table>
+	 |  </div>
+	 |  <div>
+	 |    <table>
+	 |      <tr id='21'><td>21</td></tr>
+	 |    </table>
+	 |  </div>
+	 |  <div>
+	 |    <table>
+	 |      <tr id='31'><td>31</td></tr>
+	 |      <tr id='32'><td>32</td></tr>
+	 |      <tr id='33'><td>33</td></tr>
+	 |      <tr id='34'><td>34</td></tr>
+	 |      <tr id='35'><td>35</td></tr>
+	 |      <tr id='36'><td>36</td></tr>
+	 |    </table>
+	 |  </div>
+	 */
+	_childTree = [[[HTMLParser alloc] initWithString:@"<div><table>"
+				  "<tr id='11'><td>11</td></tr>"
+				  "<tr id='12'><td>12</td></tr>"
+				  "<tr id='13'><td>13</td></tr>"
+				  "<tr id='14'><td>14</td></tr>"
+				  "</table></div>"
+				  "<div><table>"
+				  "<tr id='21'><td>21</td></tr>"
+				  "</table></div>"
+				  "<div><table>"
+				  "<tr id='31'><td>31</td></tr>"
+				  "<tr id='32'><td>32</td></tr>"
+				  "<tr id='33'><td>33</td></tr>"
+				  "<tr id='34'><td>34</td></tr>"
+				  "<tr id='35'><td>35</td></tr>"
+				  "<tr id='36'><td>36</td></tr>"
+				  "</table></div>"] document];
+
+	/*
+	 |  <div>
+	 |    <span id='s11'>s11</span>
+	 |    <span id='s12'>s12</span>
+	 |    <span id='s13'>s13</span>
+	 |    <b id='b1'>b1</b>
+	 |  </div>
+	 |  <div>
+	 |    <b id='b2'>b2</b>
+	 |    <span id='s21'>s21</span>
+	 |    <span id='s22'>s22</span>
+	 |    <span id='s23'>s23</span>
+	 |  </div>
+	 |  <div>
+	 |    <span id='s31'>s31</span>
+	 |    <b id='b3'>b3</b>
+	 |    <span id='s32'>s32</span>
+	 |    <b id='b4'>b4</b>
+	 |    <span id='s33'>s33</span>
+	 |    <b id='b5'>b5</b>
+	 |    <span id='s34'>s34</span>
+	 |  </div>
+	 */
+	_typeTree = [[[HTMLParser alloc] initWithString:@"<div>"
+				  "<span id='s11'>s11</span>"
+				  "<span id='s12'>s12</span>"
+				  "<span id='s13'>s13</span>"
+				  "<b id='b1'>b1</b>"
+				  "</div>"
+				  "<div>"
+				  "<b id='b2'>b2</b>"
+				  "<span id='s21'>s21</span>"
+				  "<span id='s22'>s22</span>"
+				  "<span id='s23'>s23</span>"
+				  "</div>"
+				  "<div>"
+				  "<span id='s31'>s31</span>"
+				  "<b id='b3'>b3</b>"
+				  "<span id='s32'>s32</span>"
+				  "<b id='b4'>b4</b>"
+				  "<span id='s33'>s33</span>"
+				  "<b id='b5'>b5</b>"
+				  "<span id='s34'>s34</span>"
+				  "</div>"] document];
+}
+
+- (void)testOddSelector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), oddSelector()])];
+	NSArray *expected = @[@"11", @"13", @"21", @"31", @"33", @"35"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testEvenSelector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), evenSlector()])];
+	NSArray *expected = @[@"12", @"14", @"32", @"34", @"36"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testFirstChildSelector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), firstChildSelector()])];
+	NSArray *expected = @[@"11", @"21", @"31"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testLastChildSelector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), lastChildSelector()])];
+	NSArray *expected = @[@"14", @"21", @"36"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testFirstOfTypeSelector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), firstOfTypeSelector()])];
+	NSArray *expected = @[@"s11", @"s21", @"s31"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testLastOfTypeSelector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), lastOfTypeSelector()])];
+	NSArray *expected = @[@"s13", @"s23", @"s34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testOnlyChildSelector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), onlyChildSelector()])];
+	NSArray *expected = @[@"21"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)testOnlyOfTypeSelector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), onlyOfTypeSelector()])];
+	NSArray *expected = @[];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), onlyOfTypeSelector()])];
+	expected = @[];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"b"), onlyOfTypeSelector()])];
+	expected = @[@"b1", @"b2"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+#pragma mark - Nth-Child Selector
+
+- (void)test_NthChild_B_Selector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(0, 1))])];
+	NSArray *expected = @[@"11", @"21", @"31"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(0, 2))])];
+	expected = @[@"12", @"32"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(0, 3))])];
+	expected = @[@"13", @"33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthChild_An_Selector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(2, 0))])];
+	NSArray *expected = @[@"12", @"14", @"32", @"34", @"36"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(3, 0))])];
+	expected = @[@"13", @"33", @"36"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(4, 0))])];
+	expected = @[@"14", @"34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthChild_An_B_Selector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(3, 1))])];
+	NSArray *expected = @[@"11", @"14", @"21", @"31", @"34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthChildSelector(CSSNthExpressionMake(3, 2))])];
+	expected = @[@"12", @"32", @"35"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+#pragma mark - Nth-Last-Child Selector
+
+- (void)test_NthLastChild_B_Selector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(0, 1))])];
+	NSArray *expected = @[@"14", @"21", @"36"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(0, 2))])];
+	expected = @[@"13", @"35"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(0, 3))])];
+	expected = @[@"12", @"34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthLastChild_An_Selector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(2, 0))])];
+	NSArray *expected = @[@"11", @"13", @"31", @"33", @"35"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(3, 0))])];
+	expected = @[@"12", @"31", @"34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(4, 0))])];
+	expected = @[@"11", @"33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthLastChild_An_B_Selector
+{
+	NSArray *elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(3, 1))])];
+	NSArray *expected = @[@"11", @"14", @"21", @"33", @"36"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_childTree elementsMatchingSelector:allOf(@[typeSelector(@"tr"), nthLastChildSelector(CSSNthExpressionMake(3, 2))])];
+	expected = @[@"13", @"32", @"35"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+#pragma mark - Nth-Of-Type Selector
+
+- (void)test_NthOfType_B_Selector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(0, 1))])];
+	NSArray *expected = @[@"s11", @"s21", @"s31"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(0, 2))])];
+	expected = @[@"s12", @"s22", @"s32"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(0, 3))])];
+	expected = @[@"s13", @"s23", @"s33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthOfType_An_Selector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(2, 0))])];
+	NSArray *expected = @[@"s12", @"s22", @"s32", @"s34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(3, 0))])];
+	expected = @[@"s13", @"s23", @"s33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(4, 0))])];
+	expected = @[@"s34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthOfType_An_B_Selector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(2, 1))])];
+	NSArray *expected = @[@"s11", @"s13", @"s21", @"s23", @"s31", @"s33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthOfTypeSelector(CSSNthExpressionMake(2, 2))])];
+	expected = @[@"s12", @"s22", @"s32", @"s34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+#pragma mark - Nth-Last-Of-Type Selector
+
+- (void)test_NthLastOfType_B_Selector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(0, 1))])];
+	NSArray *expected = @[@"s13", @"s23", @"s34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(0, 2))])];
+	expected = @[@"s12", @"s22", @"s33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(0, 3))])];
+	expected = @[@"s11", @"s21", @"s32"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthLastOfType_An_Selector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(2, 0))])];
+	NSArray *expected = @[@"s12", @"s22", @"s31", @"s33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(3, 0))])];
+	expected = @[@"s11", @"s21", @"s32"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(4, 0))])];
+	expected = @[@"s31"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+- (void)test_NthLastOfType_An_B_Selector
+{
+	NSArray *elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(2, 1))])];
+	NSArray *expected = @[@"s11", @"s13", @"s21", @"s23", @"s32", @"s34"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+
+	elements = [_typeTree elementsMatchingSelector:allOf(@[typeSelector(@"span"), nthLastOfTypeSelector(CSSNthExpressionMake(2, 2))])];
+	expected = @[@"s12", @"s22", @"s31", @"s33"];
+	XCTAssertEqualObjects([elements valueForKeyPath:@"attributes.id"], expected);
+}
+
+@end

HTMLKitTests/CSSNthExpressionsParserTests.m

@@ -0,0 +1,158 @@
+//
+//  CSSNthExpressionsParserTests.m
+//  HTMLKit
+//
+//  Created by Iska on 10/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+#import "CSSNthExpressionParser.h"
+
+@interface CSSNthExpressionsParserTests : XCTestCase
+
+@end
+
+@implementation CSSNthExpressionsParserTests
+
+- (void)testOddEvenExpression
+{
+	CSSNthExpression odd = [CSSNthExpressionParser parseExpression:@"odd"];
+	XCTAssertEqual(odd.an, 2);
+	XCTAssertEqual(odd.b, 1);
+
+	odd = [CSSNthExpressionParser parseExpression:@" odd"];
+	XCTAssertEqual(odd.an, 2);
+	XCTAssertEqual(odd.b, 1);
+
+	odd = [CSSNthExpressionParser parseExpression:@"odd "];
+	XCTAssertEqual(odd.an, 2);
+	XCTAssertEqual(odd.b, 1);
+
+	odd = [CSSNthExpressionParser parseExpression:@" odd "];
+	XCTAssertEqual(odd.an, 2);
+	XCTAssertEqual(odd.b, 1);
+
+	CSSNthExpression even = [CSSNthExpressionParser parseExpression:@"even"];
+	XCTAssertEqual(even.an, 2);
+	XCTAssertEqual(even.b, 0);
+
+	even = [CSSNthExpressionParser parseExpression:@" even"];
+	XCTAssertEqual(even.an, 2);
+	XCTAssertEqual(even.b, 0);
+
+	even = [CSSNthExpressionParser parseExpression:@"even "];
+	XCTAssertEqual(even.an, 2);
+	XCTAssertEqual(even.b, 0);
+
+	even = [CSSNthExpressionParser parseExpression:@" even "];
+	XCTAssertEqual(even.an, 2);
+	XCTAssertEqual(even.b, 0);
+}
+
+- (void)test_B_Expression
+{
+	CSSNthExpression expression = [CSSNthExpressionParser parseExpression:@"1"];
+	XCTAssertEqual(expression.an, 0);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+1"];
+	XCTAssertEqual(expression.an, 0);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-1"];
+	XCTAssertEqual(expression.an, 0);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@" -1"];
+	XCTAssertEqual(expression.an, 0);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+1 "];
+	XCTAssertEqual(expression.an, 0);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@" +1 "];
+	XCTAssertEqual(expression.an, 0);
+	XCTAssertEqual(expression.b, 1);
+}
+
+- (void)test_AN_Expression
+{
+	CSSNthExpression expression = [CSSNthExpressionParser parseExpression:@"n"];
+	XCTAssertEqual(expression.an, 1);
+	XCTAssertEqual(expression.b, 0);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+n"];
+	XCTAssertEqual(expression.an, 1);
+	XCTAssertEqual(expression.b, 0);
+
+	expression = [CSSNthExpressionParser parseExpression:@"2n"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, 0);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+2n"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, 0);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-n"];
+	XCTAssertEqual(expression.an, -1);
+	XCTAssertEqual(expression.b, 0);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-2n"];
+	XCTAssertEqual(expression.an, -2);
+	XCTAssertEqual(expression.b, 0);
+}
+
+- (void)test_AN_B_Expression
+{
+	CSSNthExpression expression = [CSSNthExpressionParser parseExpression:@"2n+1"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+2n+1"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-2n+1"];
+	XCTAssertEqual(expression.an, -2);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"2n-1"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-2n-1"];
+	XCTAssertEqual(expression.an, -2);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"n-1"];
+	XCTAssertEqual(expression.an, 1);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-n-1"];
+	XCTAssertEqual(expression.an, -1);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+n-1"];
+	XCTAssertEqual(expression.an, 1);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"+2n + 1"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@"-2n + 1"];
+	XCTAssertEqual(expression.an, -2);
+	XCTAssertEqual(expression.b, 1);
+
+	expression = [CSSNthExpressionParser parseExpression:@" 2n - 1"];
+	XCTAssertEqual(expression.an, 2);
+	XCTAssertEqual(expression.b, -1);
+
+	expression = [CSSNthExpressionParser parseExpression:@" -2n -1 "];
+	XCTAssertEqual(expression.an, -2);
+	XCTAssertEqual(expression.b, -1);
+}
+
+@end

HTMLKitTests/CSSSelectorParserTests.m

@@ -0,0 +1,104 @@
+//
+//  CSSSelectorParserTests.m
+//  HTMLKit
+//
+//  Created by Iska on 23/10/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+#import <HTMLKit/HTMLKit.h>
+#import "CSSSelectorTest.h"
+#import "CSSSelectorParser.h"
+
+@interface CSSSelectorParserTests : XCTestCase
+@property (nonatomic, strong) CSSSelectorTest *testCase;
+@end
+
+@implementation CSSSelectorParserTests
+
++ (XCTestSuite *)defaultTestSuite
+{
+	XCTestSuite *suite = [[XCTestSuite alloc] initWithName:NSStringFromClass(self)];
+
+	NSArray *tests = [CSSSelectorTest loadCSSSelectorTests];
+	for (CSSSelectorTest *test in tests) {
+		[self addSelectorTest:test toTestSuite:suite];
+	}
+
+	return suite;
+}
+
++ (void)addSelectorTest:(CSSSelectorTest *)selectorTest toTestSuite:(XCTestSuite *)suite
+{
+	NSArray *allInvocations = [self testInvocations];
+	for (NSInvocation *invocation in allInvocations) {
+		XCTestCase *testCase = [[self alloc] initWithInvocation:invocation
+													   testCase:selectorTest];
+		[suite addTest:testCase];
+	}
+}
+
+#pragma mark - Instance
+
+- (instancetype)initWithInvocation:(NSInvocation *)invocation
+						  testCase:(CSSSelectorTest *)testCase
+{
+	self = [super initWithInvocation:invocation];
+	if (self) {
+		_testCase = testCase;
+	}
+	return self;
+}
+
+- (NSString *)name
+{
+	NSInvocation *invocation = [self invocation];
+	NSString *title = self.testCase.testName.stringByDeletingPathExtension;
+	return [NSString stringWithFormat:@"-[%@ %@_%@]", self.class, NSStringFromSelector(invocation.selector), title];
+}
+
+- (NSString *)description
+{
+	return self.name;
+}
+
+#pragma mark - Tests
+
+- (void)testParser
+{
+	for (NSDictionary *testDescription in self.testCase.selectors) {
+		NSString *selectorString = testDescription[@"selector"];
+		NSArray *expectedMatches = testDescription[@"match"];
+		NSNumber *expectedError = testDescription[@"error"];
+		HTMLElement *testDOM = self.testCase.testDOM;
+
+		NSError *error = nil;
+		CSSSelector *parsedSelector = [CSSSelectorParser parseSelector:selectorString error:&error];
+
+		if (expectedError) {
+			XCTAssertNotNil(error);
+			XCTAssertNil(parsedSelector);
+
+			NSUInteger errorLocation = [error.userInfo[CSSSelectorErrorLocationKey] unsignedIntegerValue];
+			XCTAssertEqual(errorLocation, expectedError.unsignedIntegerValue);
+		} else {
+			XCTAssertNil(error);
+			XCTAssertNotNil(parsedSelector);
+
+			NSArray *matchedElements = [testDOM elementsMatchingSelector:parsedSelector];
+			NSArray *matchedIds = [matchedElements valueForKeyPath:@"attributes.id"];
+
+			NSString *message = [NSString stringWithFormat:@"CSS test: \'%@\'\nInput:\n%@\nDOM:\n%@\nExpected:\n%@\nActual:\n%@\n",
+								 self.name,
+								 selectorString,
+								 testDOM.outerHTML,
+								 expectedMatches,
+								 matchedIds];
+
+			XCTAssertEqualObjects(matchedIds, expectedMatches, @"IDs mismatch:\n%@", message);
+		}
+	}
+}
+
+@end

HTMLKitTests/CSSSelectorTest.h

@@ -0,0 +1,21 @@
+//
+//  CSSSelectorTest.h
+//  HTMLKit
+//
+//  Created by Iska on 22/11/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@class HTMLElement;
+
+@interface CSSSelectorTest : NSObject
+
+@property (nonatomic, copy) NSString *testName;
+@property (nonatomic, strong) NSArray *selectors;
+@property (nonatomic, strong) HTMLElement *testDOM;
+
++ (NSArray *)loadCSSSelectorTests;
+
+@end

HTMLKitTests/CSSSelectorTest.m

@@ -0,0 +1,60 @@
+//
+//  CSSSelectorTest.m
+//  HTMLKit
+//
+//  Created by Iska on 22/11/15.
+//  Copyright © 2015 BrainCookie. All rights reserved.
+//
+
+#import "CSSSelectorTest.h"
+#import "HTMLParser.h"
+#import "HTMLDocument.h"
+#import "HTMLElement.h"
+#import "CSSSelectors.h"
+
+static NSString * const CSSTests = @"css-tests";
+
+@implementation CSSSelectorTest
+
++ (NSArray *)loadCSSSelectorTests
+{
+	NSString *path = [[NSBundle bundleForClass:self.class] resourcePath];
+	path = [path stringByAppendingPathComponent:CSSTests];
+
+	NSMutableArray *tests = [NSMutableArray array];
+	NSArray *testFiles = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:path error:nil];
+
+	for (NSString *testFile in testFiles) {
+		if (![testFile.pathExtension isEqualToString:@"html"]) {
+			continue;
+		}
+
+		NSString *testFilePath = [path stringByAppendingPathComponent:testFile];
+		CSSSelectorTest *test = [CSSSelectorTest testWithFileAtPath:testFilePath];
+		[tests addObject:test];
+	}
+
+	return tests;
+}
+
++ (instancetype)testWithFileAtPath:(NSString *)filePath
+{
+	NSString *testName = filePath.lastPathComponent.stringByDeletingPathExtension;
+
+	NSString *html = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
+
+	HTMLDocument *document = [HTMLDocument documentWithString:html];
+
+	HTMLElement *domElement = [document firstElementMatchingSelector:idSelector(@"testDOM")];
+	HTMLElement *scriptElement = [document firstElementMatchingSelector:idSelector(@"selectors")];
+	NSData *data = [scriptElement.textContent dataUsingEncoding:NSUTF8StringEncoding];
+	NSArray *selectors = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
+
+	CSSSelectorTest *instance = [CSSSelectorTest new];
+	instance.testName = testName;
+	instance.selectors = selectors;
+	instance.testDOM = domElement;
+	return instance;
+}
+
+@end

HTMLKitTests/CSSTypeSelectorTests.m

@@ -0,0 +1,43 @@
+//
+//  CSSTypeSelectorTests.m
+//  HTMLKit
+//
+//  Created by Iska on 14/05/15.
+//  Copyright (c) 2015 BrainCookie. All rights reserved.
+//
+
+#import <XCTest/XCTest.h>
+#import "CSSSelectors.h"
+#import "HTMLDOM.h"
+#import "CSSSelectorParser.h"
+
+@interface CSSTypeSelectorTests : XCTestCase
+
+@end
+
+@implementation CSSTypeSelectorTests
+
+- (void)testUniversalSelector
+{
+	CSSSelector *selector = universalSelector();
+
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:nil]], YES);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@""]], YES);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@"div"]], YES);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@"p"]], YES);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@"any other name"]], YES);
+}
+
+- (void)testTypeSelector
+{
+	CSSSelector *selector = typeSelector(@"div");
+
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:nil]], NO);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@""]], NO);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@"p"]], NO);
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@"any other name"]], NO);
+
+	XCTAssertEqual([selector acceptElement:[[HTMLElement alloc] initWithTagName:@"div"]], YES);
+}
+
+@end

HTMLKitTests/HTMLKitOrderedDictionaryTests.m

@@ -38,9 +38,6 @@
 	[_dictionary setObject:@"3" forKey:@"C"];
 	expected =  @[@"A", @"B", @"C"];
 	XCTAssertEqualObjects(_dictionary.keyEnumerator.allObjects, expected);
-
-	XCTAssertThrows([_dictionary setObject:nil forKey:@"Key"]);
-	XCTAssertThrows([_dictionary setObject:@"Object" forKey:nil]);
 }
 
 - (void)testIndexOfKey
@@ -51,7 +48,6 @@
 	XCTAssertEqual([_dictionary indexOfKey:@"A"], 0);
 	XCTAssertEqual([_dictionary indexOfKey:@"B"], 1);
 	XCTAssertEqual([_dictionary indexOfKey:@"C"], 2);
-	XCTAssertEqual([_dictionary indexOfKey:nil], NSNotFound);
 }
 
 - (void)testObjectAtIndex
@@ -64,8 +60,6 @@
 	[_dictionary setObject:@"3" forKey:@"C" atIndex:1];
 	XCTAssertEqualObjects([_dictionary objectAtIndex:1], @"3");
 
-	XCTAssertThrows([_dictionary setObject:nil forKey:@"Key" atIndex:0]);
-	XCTAssertThrows([_dictionary setObject:@"Object" forKey:nil atIndex:0]);
 	XCTAssertThrows([_dictionary setObject:@"Object" forKey:@"Key" atIndex:100]);
 }
 
@@ -120,8 +114,6 @@
 	XCTAssertEqualObjects(_dictionary[2], @"5");
 	XCTAssertEqualObjects(_dictionary[@"A"], @"5");
 
-	XCTAssertThrows([_dictionary setObject:nil forKey:@"Key" atIndex:0]);
-	XCTAssertThrows([_dictionary setObject:@"Object" forKey:nil atIndex:0]);
 	XCTAssertThrows([_dictionary setObject:@"Object" forKey:@"Key" atIndex:100]);
 }
 
@@ -158,8 +150,6 @@
 	XCTAssertEqualObjects(_dictionary[0], @"5");
 	XCTAssertEqualObjects(_dictionary[@"E"], @"5");
 
-	XCTAssertThrows([_dictionary replaceKeyValueAtIndex:1 withObject:nil andKey:@"Key"]);
-	XCTAssertThrows([_dictionary replaceKeyValueAtIndex:1 withObject:@"Object" andKey:nil]);
 	XCTAssertThrows([_dictionary replaceKeyValueAtIndex:100 withObject:@"Object" andKey:@"Key"]);
 }
 

HTMLKitTests/HTMLKitTreeConstructionTests.m

@@ -96,8 +96,8 @@
 			actual = [parser parseFragmentWithContextElement:contextElement];
 		}
 
-		NSString *expectedNodes = [[test.nodes valueForKey:@"debugDescription"] componentsJoinedByString:@"\n"];
-		NSString *actualNodes = [[parser.document.childNodes.array valueForKey:@"debugDescription"] componentsJoinedByString:@"\n"];
+		NSString *expectedNodes = [[test.nodes valueForKey:@"treeDescription"] componentsJoinedByString:@"\n"];
+		NSString *actualNodes = [[actual valueForKey:@"treeDescription"] componentsJoinedByString:@"\n"];
 
 		NSString *message = [NSString stringWithFormat:@"HTML5Lib test in file: \'%@\'\nInput:\n%@\nExpected:\n%@\nActual:\n%@\n",
 							 test.testFile,

HTMLKitTests/css-tests/1.html

@@ -0,0 +1,13 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "li,p",
+            "match": ["1", "2", "3"]
+        }]
+</script>
+<div id="testDOM">
+    <ul>
+        <li id="1">The background of this list item should be green</li>
+        <li id="2">The background of this second list item should be also green</li>
+    </ul>
+    <p id="3">The background of this paragraph should be green.</p>
+</div>

HTMLKitTests/css-tests/10.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p[title$=\"bar\"]",
+            "match": ["1"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" title="foobar">This paragraph should have a green background because its title attribute ends with &quot;bar&quot;</p>
+</div>

HTMLKitTests/css-tests/11.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p[title*=\"bar\"]",
+            "match": ["1"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" title="foobarufoo">This paragraph should have a green background because its title attribute contains &quot;bar&quot;</p>
+</div>

HTMLKitTests/css-tests/13.html

@@ -0,0 +1,23 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".t1",
+            "match": ["1"]
+        },
+        {
+            "selector": "li.t2",
+            "match": ["2", "3"]
+        },
+        {
+            "selector": ".t3",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <ul>
+      <li  id="1" class="t1">This list item should have green background because its class is &quot;t1&quot;</li>
+      <li  id="2" class="t2">This list item should have green background because its class is &quot;t2&quot;</li>
+      <li  id="3" class="t2">
+          <span  id="4" class="t33">This list item should have green background because the inner SPAN does not match SPAN.t3</span>
+        </li>
+    </ul>
+</div>

HTMLKitTests/css-tests/14.html

@@ -0,0 +1,30 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p.t1",
+            "match": ["1"]
+        },
+        {
+            "selector": "p.t2",
+            "match": ["1"]
+        },
+        {
+            "selector": "div.teST",
+            "match": []
+        },
+        {
+            "selector": "div.te",
+            "match": []
+        },
+        {
+            "selector": "div.st",
+            "match": []
+        },
+        {
+            "selector": "div.te.st",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="t1 t2">This paragraph should have a green background and a green thick solid border because it carries both classes t1 and t2.</p>
+    <div id="2" class="test">This line should be green.</div>
+</div>

HTMLKitTests/css-tests/144.html

@@ -0,0 +1,11 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "div :not(:enabled):not(:disabled)",
+            "match": ["1", "2"]
+        }]
+</script>
+<div id="testDOM">
+    <div id="1">
+        <p id="2">This paragraph should have a green background.</p>
+    </div>
+</div>

HTMLKitTests/css-tests/148.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p:empty",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/149.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "address:empty",
+            "match": ["1"]
+        }]
+</script>
+<div id="testDOM">
+    <address id="1"></address>
+    <div id="2" class="text">This line should have a green background.</div>
+</div>

HTMLKitTests/css-tests/14b.html

@@ -0,0 +1,22 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".t1.fail",
+            "match": []
+        },
+        {
+            "selector": ".fail.t2",
+            "match": []
+        },
+        {
+            "selector": ".t2.fail",
+            "match": []
+        },
+        {
+            "selector": ".fail.t2",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="t1">This line should be green.</p>
+    <p id="2" class="t1 t2">This line should be green.</p>
+</div>

HTMLKitTests/css-tests/14c.html

@@ -0,0 +1,19 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p.t1.t2",
+            "match": ["1"]
+        },
+        {
+            "selector": "div.t1",
+            "match": []
+        },
+        {
+            "selector": "address.t5.t5",
+            "match": ["3"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="t1 t2">This line should be green.</p>
+    <div id="2" class="t3">This line should be green.</div>
+    <address id="3" class="t4 t5 t6">This line should be green.</address>
+</div>

HTMLKitTests/css-tests/14d.html

@@ -0,0 +1,21 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".t1:not(.t2)",
+            "match": []
+        },
+        {
+            "selector": ":not(.t2).t1",
+            "match": []
+        },
+        {
+            "selector": ".t2:not(.t1)",
+            "match": []
+        },
+        {
+            "selector": ":not(.t1).t2",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="t1 t2">This line should be green.</p>
+</div>

HTMLKitTests/css-tests/14e.html

@@ -0,0 +1,19 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p:not(.t1):not(.t2)",
+            "match": []
+        },
+        {
+            "selector": "div:not(.t1)",
+            "match": ["testDOM", "2"]
+        },
+        {
+            "selector": "address:not(.t5):not(.t5)",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="t1 t2">This line should be green.</p>
+    <div id="2" class="t3">This line should be green.</div>
+    <address id="3" class="t4 t5 t6">This line should be green.</address>
+</div>

HTMLKitTests/css-tests/15.html

@@ -0,0 +1,27 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "#t1",
+            "match": ["t1"]
+        },
+        {
+            "selector": "li#t2",
+            "match": ["t2"]
+        },
+        {
+            "selector": "li#t3",
+            "match": ["t3"]
+        },
+        {
+            "selector": "#t4",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <ul id="1">
+      <li id="t1">This list item should have a green background. because its ID is &quot;t1&quot;</li>
+      <li id="t2">This list item should have a green background. because its ID is &quot;t2&quot;</li>
+      <li id="t3">
+          <span id="t44">This list item should have a green background. because the inner SPAN does not match &quot;#t4&quot;</span>
+      </li>
+    </ul>
+</div>

HTMLKitTests/css-tests/150.html

@@ -0,0 +1,11 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "address:empty",
+            "match": ["1"]
+        }]
+</script>
+<div id="testDOM">
+    <address id="1"><!-- --><?test random PI></address>
+    <div id="2" class="text">This line should have a green background.</div>
+    <p id="3">(Note: This test is based on unpublished errata.)</p>
+</div>

HTMLKitTests/css-tests/151.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "address:empty",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <address id="1"> </address>
+    <div id="2" class="text">This line should have a green background.</div>
+</div>

HTMLKitTests/css-tests/152.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "address:empty",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <address id="1"><span id="2"></span></address>
+    <div id="3" class="text">This line should have a green background.</div>
+</div>

HTMLKitTests/css-tests/154.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p,",
+            "match": [],
+            "error": 1
+        }]
+</script>
+<div id="testDOM">
+    <p id="1">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/155.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".5cm",
+            "match": [],
+            "error": 1
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="5cm">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/155a.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".\\5cm",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p class="5cm">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/155b.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".two\\ words",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p class="two words">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/155c.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".one.word",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p class="one.word">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/155d.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".one\\.word",
+            "match": ["1"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="one.word">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/156.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "foo & address, p",
+            "match": [],
+            "error": 5
+        }]
+</script>
+<div id="testDOM">
+    <p>This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/157.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "[*=test]",
+            "match": [],
+            "error": 2
+        }]
+</script>
+<div id="testDOM">
+    <p class="test">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/158.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "[*|*=test]",
+            "match": [],
+            "error": 2
+        }]
+</script>
+<div id="testDOM">
+    <p class="test">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/15b.html

@@ -0,0 +1,22 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "#test#fail",
+            "match": []
+        },
+        {
+            "selector": "#fail#test",
+            "match": []
+        },
+        {
+            "selector": "#fail",
+            "match": []
+        },
+        {
+            "selector": "#pass#pass",
+            "match": ["pass"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="test">This line should be green.</p>
+    <div id="pass">This line should be green.</div>
+</div>

HTMLKitTests/css-tests/16.html

@@ -0,0 +1,15 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p.test a",
+            "match": ["2"]
+        },
+        {
+            "selector": "p.test *:link",
+            "match": ["2"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="test">
+        <a  id="2" href="http://unvisited.example.org/css3-modsel-16/">This link should have green background.</a> (Don&#39;t follow this link.)
+    </p>
+</div>

HTMLKitTests/css-tests/160.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p:subject",
+            "match": [],
+            "error": 9
+        }]
+</script>
+<div id="testDOM">
+    <p class="test">This line should have a green background.</p>
+</div>

HTMLKitTests/css-tests/175a.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".13",
+            "match": [],
+            "error": 1
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="13">This line should be green.</p>
+</div>

HTMLKitTests/css-tests/175b.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".\13",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="13">This line should be green.</p>
+</div>

HTMLKitTests/css-tests/175c.html

@@ -0,0 +1,9 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".\31 \33",
+            "match": ["1"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="13">This line should be green.</p>
+</div>

HTMLKitTests/css-tests/176.html

@@ -0,0 +1,30 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p:not(#other).class:not(.fail).test#id#id",
+            "match": ["id"]
+        },
+        {
+            "selector": "div:not(#theid).class:not(.fail).test#theid#theid",
+            "match": []
+        },
+        {
+            "selector": "div:not(#other).notclass:not(.fail).test#theid#theid",
+            "match": []
+        },
+        {
+            "selector": "div:not(#other).class:not(.test).test#theid#theid",
+            "match": []
+        },
+        {
+            "selector": "div:not(#other).class:not(.fail).nottest#theid#theid",
+            "match": []
+        },
+        {
+            "selector": "div:not(#other).class:not(.fail).nottest#theid#other",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="id" class="class test">This line should be green.</p>
+    <div id="theid" class="class test">This line should be green.</div>
+</div>

HTMLKitTests/css-tests/177b.html

@@ -0,0 +1,12 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p::first-child",
+            "match": [],
+            "error": 2
+        }]
+</script>
+<div id="testDOM">
+    <div>
+        <p>This line should be green.</p>
+    </div>
+</div>

HTMLKitTests/css-tests/181.html

@@ -0,0 +1,26 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": ".ci P",
+            "match": ["2", "3", "4"]
+        },
+        {
+            "selector": ".ci .a",
+            "match": []
+        },
+        {
+            "selector": ".ci SPAN",
+            "match": ["5"]
+        }]
+</script>
+<div id="testDOM">
+    <div>
+
+
+        <div id="1" class="ci">
+            <p id="2">This line should be green.</p>
+            <p id="3" class="A">This line should be green.</p>
+            <p id="4"><SPAN id="5">This line should be green.</SPAN></p>
+        </div>
+
+    </div>
+</div>

HTMLKitTests/css-tests/183.html

@@ -0,0 +1,25 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "..test",
+            "match": [],
+            "error": 1
+        },
+        {
+            "selector": ".foo..quux ",
+            "match": [],
+            "error": 5
+        },
+        {
+            "selector": ".bar.",
+            "match": [],
+            "error": 5
+        }]
+</script>
+<div id="testDOM">
+    <p class="test">This text should be green.</p>
+    <p class=".test">This text should be green.</p>
+    <p class="foo">This text should be green.</p>
+    <p class="foo quux">This text should be green.</p>
+    <p class="foo  quux">This text should be green.</p>
+    <p class=" bar ">This text should be green.</p>
+</div>

HTMLKitTests/css-tests/184a.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p[class$=\"\"]",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="">This text should be green.</p>
+    <p id="2">This text should be green.</p>
+</div>

HTMLKitTests/css-tests/184b.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p[class^=\"\"]",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="">This text should be green.</p>
+    <p id="2">This text should be green.</p>
+</div>

HTMLKitTests/css-tests/184c.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p[class*=\"\"]",
+            "match": []
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="">This text should be green.</p>
+    <p id="2">This text should be green.</p>
+</div>

HTMLKitTests/css-tests/184d.html

@@ -0,0 +1,10 @@
+<script type="application/json" id="selectors">
+        [{
+            "selector": "p:not([class$=\"\"])",
+            "match": ["1", "2"]
+        }]
+</script>
+<div id="testDOM">
+    <p id="1" class="">This text should be green.</p>
+    <p id="2">This text should be green.</p>
+</div>