Fix stylesheet ordering + Background implicit transparent

WebicityBrowser · Dec 4, 2024 · 6173276 · 6173276
1 parent 5a30a36
commit 6173276
Showing 10 changed files with 75 additions and 68 deletions.
diff --git a/...main/java/com/github/webicitybrowser/spec/css/parser/selectors/ComplexSelectorParser.java b/...main/java/com/github/webicitybrowser/spec/css/parser/selectors/ComplexSelectorParser.java
@@ -23,8 +23,8 @@
 import com.github.webicitybrowser.spec.css.parser.tokens.WhitespaceToken;
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelector;
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelectorPart;
+import com.github.webicitybrowser.spec.css.selectors.SelectorOrderingTag;
 import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity;
-import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity.Source;
 
 public class ComplexSelectorParser {
 
@@ -36,14 +36,14 @@ public class ComplexSelectorParser {
 
 	private final CombinatorParser combinatorParser = new CombinatorParser();
 
-	public ComplexSelector[] parseMany(TokenLike[] prelude, int order, Source source) {
+	public ComplexSelector[] parseMany(TokenLike[] prelude, int order, SelectorOrderingTag orderingTag) {
 		TokenStream stream = new TokenStreamImp(prelude);
 		List<ComplexSelector> selectors = new ArrayList<>();
 
 		while (!(stream.peek() instanceof EOFToken)) {
 			ComplexSelector complexSelector;
 			try {
-				complexSelector = consumeComplexSelector(stream, order, source);
+				complexSelector = consumeComplexSelector(stream, order, orderingTag);
 				if (complexSelector != null) {
 					selectors.add(complexSelector);
 				} else {
@@ -57,7 +57,7 @@ public ComplexSelector[] parseMany(TokenLike[] prelude, int order, Source source
 		return selectors.toArray(ComplexSelector[]::new);
 	}
 
-	private ComplexSelector consumeComplexSelector(TokenStream stream, int order, Source source) throws ParseFormatException {
+	private ComplexSelector consumeComplexSelector(TokenStream stream, int order, SelectorOrderingTag orderingTag) throws ParseFormatException {
 		List<ComplexSelectorPart> selectorParts = new ArrayList<>();
 
 		consumeWhitespace(stream);
@@ -77,7 +77,7 @@ private ComplexSelector consumeComplexSelector(TokenStream stream, int order, So
 
 		stream.read();
 
-		return createComplexSelectorFromParts(selectorParts, order, source);
+		return createComplexSelectorFromParts(selectorParts, order, orderingTag);
 	}
 
 	private void consumeSimpleSelectors(TokenStream stream, List<ComplexSelectorPart> selectorParts) throws ParseFormatException {
@@ -129,21 +129,11 @@ private void throwOutBadRule(TokenStream stream) {
 		while (!isSeperatingToken(stream.read()));
 	}
 
-	private ComplexSelector createComplexSelectorFromParts(List<ComplexSelectorPart> selectorParts, int order, Source source) {
+	private ComplexSelector createComplexSelectorFromParts(List<ComplexSelectorPart> selectorParts, int order, SelectorOrderingTag orderingTag) {
 		ComplexSelectorPart[] parts = selectorParts.toArray(ComplexSelectorPart[]::new);
-		SelectorSpecificity selectorSpecificity = SelectorSpecificityCalculator.calculateSpecificity(parts, order, source);
+		SelectorSpecificity selectorSpecificity = SelectorSpecificityCalculator.calculateSpecificity(parts, order, orderingTag);
 
-		return new ComplexSelector() {	
-			@Override
-			public SelectorSpecificity getSpecificity() {
-				return selectorSpecificity;
-			}
-
-			@Override
-			public ComplexSelectorPart[] getParts() {
-				return parts;
-			}
-		};
+		return new ComplexSelector(parts, selectorSpecificity);
 	}
 
 }
diff --git a/...a/com/github/webicitybrowser/spec/css/parser/selectors/SelectorSpecificityCalculator.java b/...a/com/github/webicitybrowser/spec/css/parser/selectors/SelectorSpecificityCalculator.java
@@ -3,8 +3,8 @@
 import java.util.function.Function;
 
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelectorPart;
+import com.github.webicitybrowser.spec.css.selectors.SelectorOrderingTag;
 import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity;
-import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity.Source;
 import com.github.webicitybrowser.spec.css.selectors.selector.AttributeSelector;
 import com.github.webicitybrowser.spec.css.selectors.selector.IDSelector;
 import com.github.webicitybrowser.spec.css.selectors.selector.TypeSelector;
@@ -13,12 +13,12 @@ public final class SelectorSpecificityCalculator {
 
 	private SelectorSpecificityCalculator() {}
 
-	public static SelectorSpecificity calculateSpecificity(ComplexSelectorPart[] parts, int order, Source source) {
+	public static SelectorSpecificity calculateSpecificity(ComplexSelectorPart[] parts, int order, SelectorOrderingTag orderingTag) {
 		int idCount = countSelectors(parts, selector -> selector instanceof IDSelector);
 		int attributeCount = countSelectors(parts, selector -> selector instanceof AttributeSelector);
 		int typeCount = countSelectors(parts, selector -> selector instanceof TypeSelector);
 
-		return new SelectorSpecificity(source, idCount, attributeCount, typeCount, order);
+		return new SelectorSpecificity(orderingTag.source(), idCount, attributeCount, typeCount, orderingTag.documentOrder(), order);
 	}
 
 	private static int countSelectors(ComplexSelectorPart[] parts, Function<ComplexSelectorPart, Boolean> filter) {

diff --git a/Spec/src/main/java/com/github/webicitybrowser/spec/css/selectors/ComplexSelector.java b/Spec/src/main/java/com/github/webicitybrowser/spec/css/selectors/ComplexSelector.java
@@ -1,9 +1,5 @@
 package com.github.webicitybrowser.spec.css.selectors;
 
-public interface ComplexSelector extends ComplexSelectorPart {
-
-	ComplexSelectorPart[] getParts();
-
-	SelectorSpecificity getSpecificity();
+public record ComplexSelector(ComplexSelectorPart[] parts, SelectorSpecificity specificity) implements ComplexSelectorPart {
 
 }
diff --git a/Spec/src/main/java/com/github/webicitybrowser/spec/css/selectors/SelectorOrderingTag.java b/Spec/src/main/java/com/github/webicitybrowser/spec/css/selectors/SelectorOrderingTag.java
@@ -0,0 +1,8 @@
+package com.github.webicitybrowser.spec.css.selectors;
+
+import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity.Source;
+
+// TODO: How will imported resources be handled?
+public record SelectorOrderingTag(Source source, int documentOrder) {
+
+}
diff --git a/Spec/src/main/java/com/github/webicitybrowser/spec/css/selectors/SelectorSpecificity.java b/Spec/src/main/java/com/github/webicitybrowser/spec/css/selectors/SelectorSpecificity.java
@@ -1,6 +1,6 @@
 package com.github.webicitybrowser.spec.css.selectors;
 
-public record SelectorSpecificity(Source source, int idSelectors, int attributeSelectors, int typeSelectors, int order) implements Comparable<SelectorSpecificity> {
+public record SelectorSpecificity(Source source, int idSelectors, int attributeSelectors, int typeSelectors, int documentOrder, int order) implements Comparable<SelectorSpecificity> {
 
 	@Override
 	public int compareTo(SelectorSpecificity specificity) {
@@ -12,6 +12,8 @@ public int compareTo(SelectorSpecificity specificity) {
 			return attributeSelectors > specificity.attributeSelectors() ? 1 : -1;
 		} else if (typeSelectors != specificity.typeSelectors()) {
 			return typeSelectors > specificity.typeSelectors() ? 1 : -1;
+		} else if (documentOrder != specificity.documentOrder()) {
+			return documentOrder > specificity.documentOrder() ? 1 : -1;
 		} else if (order != specificity.order()) {
 			return order > specificity.order() ? 1 : -1;
 		} else {

diff --git a/.../java/com/github/webicitybrowser/spec/css/parser/selectors/ComplexSelectorParserTest.java b/.../java/com/github/webicitybrowser/spec/css/parser/selectors/ComplexSelectorParserTest.java
@@ -17,6 +17,7 @@
 import com.github.webicitybrowser.spec.css.parser.tokens.WhitespaceToken;
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelector;
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelectorPart;
+import com.github.webicitybrowser.spec.css.selectors.SelectorOrderingTag;
 import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity.Source;
 import com.github.webicitybrowser.spec.css.selectors.combinator.ChildCombinator;
 import com.github.webicitybrowser.spec.css.selectors.combinator.DescendantCombinator;
@@ -27,6 +28,8 @@
 
 public class ComplexSelectorParserTest {
 
+	private static final SelectorOrderingTag DEFAULT_ORDERING_TAG = new SelectorOrderingTag(Source.UA, 0);
+
 	private ComplexSelectorParser complexSelectorParser;
 
 	@BeforeEach
@@ -38,7 +41,7 @@ public void beforeEach() {
 	@DisplayName("Empty input returns no complex selectors")
 	public void emptyInputReturnsNoComplexSelectors() {
 		TokenLike[] tokens = new TokenLike[0];
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertArrayEquals(new ComplexSelector[0], selectors);
 	}
 
@@ -48,9 +51,9 @@ public void identTokenCreatesTypeSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new IdentToken("hi")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(1, parts.length);
 		Assertions.assertInstanceOf(TypeSelector.class, parts[0]);
 		TypeSelector selector = (TypeSelector) parts[0];
@@ -63,7 +66,7 @@ public void twoSubsequentIdentTokensDiscarded() {
 		TokenLike[] tokens = new TokenLike[] {
 			new IdentToken("hi"), new IdentToken("hi")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(0, selectors.length);
 	}
 
@@ -73,16 +76,16 @@ public void twoCommaDelimitedIdentTokensCreateTypeSelectors() {
 		TokenLike[] tokens = new TokenLike[] {
 			new IdentToken("hi"), new CommaToken(), new IdentToken("bye")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(2, selectors.length);
 		{
-			ComplexSelectorPart[] parts = selectors[0].getParts();
+			ComplexSelectorPart[] parts = selectors[0].parts();
 			Assertions.assertEquals(1, parts.length);
 			Assertions.assertInstanceOf(TypeSelector.class, parts[0]);
 			TypeSelector selector = (TypeSelector) parts[0];
 			Assertions.assertEquals("hi", selector.getQualifiedName().getName());
 		} {
-			ComplexSelectorPart[] parts = selectors[1].getParts();
+			ComplexSelectorPart[] parts = selectors[1].parts();
 			Assertions.assertEquals(1, parts.length);
 			Assertions.assertInstanceOf(TypeSelector.class, parts[0]);
 			TypeSelector selector = (TypeSelector) parts[0];
@@ -96,9 +99,9 @@ public void identTokenWithWhitespaceCreatesTypeSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new WhitespaceToken(), new IdentToken("hi"), new WhitespaceToken()
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(1, parts.length);
 		Assertions.assertInstanceOf(TypeSelector.class, parts[0]);
 		TypeSelector selector = (TypeSelector) parts[0];
@@ -111,9 +114,9 @@ public void dotDelimTokenCreatesClassSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new DelimToken('.'), new IdentToken("hi")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(1, parts.length);
 		Assertions.assertInstanceOf(AttributeSelector.class, parts[0]);
 		AttributeSelector selector = (AttributeSelector) parts[0];
@@ -126,9 +129,9 @@ public void poundDelimTokenCreatesIDSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new HashToken("hi", HashTypeFlag.ID)
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(1, parts.length);
 		Assertions.assertInstanceOf(IDSelector.class, parts[0]);
 		IDSelector selector = (IDSelector) parts[0];
@@ -141,9 +144,9 @@ public void colonCreatesPsuedoSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new ColonToken(), new IdentToken("root")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(1, parts.length);
 		Assertions.assertInstanceOf(RootSelector.class, parts[0]);
 	}
@@ -154,9 +157,9 @@ public void leftSquareBracketTokenCreatesAttributeSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new LSBracketToken(), new IdentToken("hi"), new RSBracketToken()
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(1, parts.length);
 		Assertions.assertInstanceOf(AttributeSelector.class, parts[0]);
 		AttributeSelector selector = (AttributeSelector) parts[0];
@@ -169,9 +172,9 @@ public void twoSubsequentDotDelimTokensCreatesMultiClassSelector() {
 		TokenLike[] tokens = new TokenLike[] {
 			new DelimToken('.'), new IdentToken("hi"), new DelimToken('.'), new IdentToken("bye")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(2, parts.length);
 
 		Assertions.assertInstanceOf(AttributeSelector.class, parts[0]);
@@ -190,9 +193,9 @@ public void twoSubsequentLeftSquareBracketTokensCreatesMultiAttributeSelector()
 			new LSBracketToken(), new IdentToken("hi"), new RSBracketToken(),
 			new LSBracketToken(), new IdentToken("bye"), new RSBracketToken()
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(2, parts.length);
 
 		Assertions.assertInstanceOf(AttributeSelector.class, parts[0]);
@@ -210,9 +213,9 @@ public void canParseComplexSelectorWithBasicCombinators() {
 		TokenLike[] tokens = new TokenLike[] {
 			new IdentToken("hi"), new DelimToken('>'), new IdentToken("bye")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(3, parts.length);
 
 		Assertions.assertInstanceOf(TypeSelector.class, parts[0]);
@@ -232,9 +235,9 @@ public void canParseComplexSelectorWithDescendantCombinator() {
 		TokenLike[] tokens = new TokenLike[] {
 			new IdentToken("hi"), new WhitespaceToken(), new IdentToken("bye")
 		};
-		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, Source.UA);
+		ComplexSelector[] selectors = complexSelectorParser.parseMany(tokens, 0, DEFAULT_ORDERING_TAG);
 		Assertions.assertEquals(1, selectors.length);
-		ComplexSelectorPart[] parts = selectors[0].getParts();
+		ComplexSelectorPart[] parts = selectors[0].parts();
 		Assertions.assertEquals(3, parts.length);
 
 		Assertions.assertInstanceOf(TypeSelector.class, parts[0]);

diff --git a/...a/com/github/webicitybrowser/webicity/renderer/backend/html/cssom/CSSOMTreeGenerator.java b/...a/com/github/webicitybrowser/webicity/renderer/backend/html/cssom/CSSOMTreeGenerator.java
@@ -1,7 +1,7 @@
 package com.github.webicitybrowser.webicity.renderer.backend.html.cssom;
 
 import com.github.webicitybrowser.spec.css.rule.CSSRuleList;
-import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity.Source;
+import com.github.webicitybrowser.spec.css.selectors.SelectorOrderingTag;
 import com.github.webicitybrowser.webicity.renderer.backend.html.cssom.imp.CSSOMTreeGeneratorImp;
 
 /**
@@ -15,7 +15,7 @@ public interface CSSOMTreeGenerator<T> {
 	 * @param ruleList the {@link CSSRuleList} to create the {@link CSSOMTree} from
 	 * @return the created {@link CSSOMTree}
 	 */
-	CSSOMTree<T, CSSRuleList> createCSSOMFor(CSSRuleList ruleList, Source source);
+	CSSOMTree<T, CSSRuleList> createCSSOMFor(CSSRuleList ruleList, SelectorOrderingTag orderingTag);
 
 	/**
 	 * Creates a {@link CSSOMTreeGenerator} using the given {@link CSSOMFilterCreator}

diff --git a/...ithub/webicitybrowser/webicity/renderer/backend/html/cssom/imp/CSSOMTreeGeneratorImp.java b/...ithub/webicitybrowser/webicity/renderer/backend/html/cssom/imp/CSSOMTreeGeneratorImp.java
@@ -12,7 +12,7 @@
 import com.github.webicitybrowser.spec.css.rule.QualifiedRule;
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelector;
 import com.github.webicitybrowser.spec.css.selectors.ComplexSelectorPart;
-import com.github.webicitybrowser.spec.css.selectors.SelectorSpecificity.Source;
+import com.github.webicitybrowser.spec.css.selectors.SelectorOrderingTag;
 import com.github.webicitybrowser.webicity.renderer.backend.html.cssom.CSSOMFilter;
 import com.github.webicitybrowser.webicity.renderer.backend.html.cssom.CSSOMFilterCreator;
 import com.github.webicitybrowser.webicity.renderer.backend.html.cssom.CSSOMNode;
@@ -28,29 +28,29 @@ public CSSOMTreeGeneratorImp(CSSOMFilterCreator<T> filterCreator) {
 	}
 
 	@Override
-	public CSSOMTree<T, CSSRuleList> createCSSOMFor(CSSRuleList ruleList, Source source) {
+	public CSSOMTree<T, CSSRuleList> createCSSOMFor(CSSRuleList ruleList, SelectorOrderingTag orderingTag) {
 		CSSOMNode<T, CSSRuleList> rootNode = CSSOMNode.create(null, null);
-		addRuleListToCSSOMNode(rootNode, ruleList, source);
+		addRuleListToCSSOMNode(rootNode, ruleList, orderingTag);
 
 		return CSSOMTree.create(rootNode);
 	}
 
-	private void addRuleListToCSSOMNode(CSSOMNode<T, CSSRuleList> rootNode, CSSRuleList ruleList, Source source) {
+	private void addRuleListToCSSOMNode(CSSOMNode<T, CSSRuleList> rootNode, CSSRuleList ruleList, SelectorOrderingTag orderingTag) {
 		for (int i = 0; i < ruleList.getLength(); i++) {
 			CSSRule rule = ruleList.getItem(i);
-			addCSSRuleToCSSOMNode(rootNode, rule, i, source);
+			addCSSRuleToCSSOMNode(rootNode, rule, i, orderingTag);
 		}
 	}
 
-	private void addCSSRuleToCSSOMNode(CSSOMNode<T, CSSRuleList> rootNode, CSSRule rule, int order, Source source) {
+	private void addCSSRuleToCSSOMNode(CSSOMNode<T, CSSRuleList> rootNode, CSSRule rule, int order, SelectorOrderingTag orderingTag) {
 		if (rule instanceof QualifiedRule qualifiedRule) {
-			addQualifiedRuleToCSSOMNode(rootNode, qualifiedRule, order, source);
+			addQualifiedRuleToCSSOMNode(rootNode, qualifiedRule, order, orderingTag);
 		}
 	}
 
-	private void addQualifiedRuleToCSSOMNode(CSSOMNode<T, CSSRuleList> rootNode, QualifiedRule rule, int order, Source source) {
+	private void addQualifiedRuleToCSSOMNode(CSSOMNode<T, CSSRuleList> rootNode, QualifiedRule rule, int order, SelectorOrderingTag orderingTag) {
 		TokenLike[] prelude = rule.prelude().toArray(TokenLike[]::new);
-		ComplexSelector[] selectors = new ComplexSelectorParser().parseMany(prelude, order, source);
+		ComplexSelector[] selectors = new ComplexSelectorParser().parseMany(prelude, order, orderingTag);
 		for (ComplexSelector selector: selectors) {
 			CSSOMNode<T, CSSRuleList> targetNode = getSelectedCSSOMNode(rootNode, selector);
 			CSSRuleList properties = createCSSRuleList(rule.value());
@@ -62,11 +62,11 @@ private CSSOMNode<T, CSSRuleList> getSelectedCSSOMNode(
 		CSSOMNode<T, CSSRuleList> rootNode, ComplexSelector selector
 	) {
 		CSSOMNode<T, CSSRuleList> current = rootNode;
-		for (ComplexSelectorPart complexSelectorPart: selector.getParts()) {
+		for (ComplexSelectorPart complexSelectorPart: selector.parts()) {
 			CSSOMFilter<T, CSSRuleList> filter = filterCreator.createFilterFor(complexSelectorPart);
 			current = current.createChild(filter, 0);
 		}
-		current.setSpecificity(selector.getSpecificity());
+		current.setSpecificity(selector.specificity());
 
 		return current;
 	}

diff --git a/.../webicitybrowser/webicity/renderer/frontend/thready/html/ThreadyHTMLRendererFrontend.java b/.../webicitybrowser/webicity/renderer/frontend/thready/html/ThreadyHTMLRendererFrontend.java
@@ -10,6 +10,7 @@
 import com.github.webicitybrowser.spec.css.parser.tokens.Token;
 import com.github.webicitybrowser.spec.css.rule.CSSRule;
 import com.github.webicitybrowser.spec.css.rule.CSSRuleList;
+import com.github.webicitybrowser.spec.css.selectors.SelectorOrderingTag;
 import com.github.webicitybrowser.spec.html.node.HTMLDocument;
 import com.github.webicitybrowser.thready.drawing.core.text.CommonFontWeights;
 import com.github.webicitybrowser.thready.drawing.core.text.FontDecoration;
@@ -102,8 +103,11 @@ private CSSRuleList loadUAStylesheet() {
 	private CSSOMTree<DocumentStyleGenerator, CSSRuleList>[] createCSSOMTrees(DocumentStyleSheetSet styleSheetSet) {
 		List<CSSOMTree<DocumentStyleGenerator, CSSRuleList>> cssomTrees = new ArrayList<>();
 		CSSOMTreeGenerator<DocumentStyleGenerator> binder = CSSOMTreeGenerator.create(CSSOMFilterCreator.create(node -> node.getDOMNode()));
-		for (CSSRuleListEntry ruleEntry: styleSheetSet.getRuleLists()) {
-			cssomTrees.add(binder.createCSSOMFor(ruleEntry.ruleList(), ruleEntry.source()));
+		List<CSSRuleListEntry> ruleLists = styleSheetSet.getRuleLists();
+		for (int i = 0; i < ruleLists.size(); i++) {
+			CSSRuleListEntry ruleEntry = ruleLists.get(i);
+			SelectorOrderingTag tag = new SelectorOrderingTag(ruleEntry.source(), i);
+			cssomTrees.add(binder.createCSSOMFor(ruleEntry.ruleList(), tag));
 		}
 
 		return cssomTrees.toArray(new CSSOMTree[0]);

diff --git a/.../thready/html/style/cssbinding/decparser/background/CSSOMBackgroundDeclarationParser.java b/.../thready/html/style/cssbinding/decparser/background/CSSOMBackgroundDeclarationParser.java
@@ -8,6 +8,7 @@
 import com.github.webicitybrowser.spec.css.property.background.BackgroundValue;
 import com.github.webicitybrowser.spec.css.property.background.BackgroundValue.BackgroundLayer;
 import com.github.webicitybrowser.spec.css.property.color.ColorValue;
+import com.github.webicitybrowser.thready.color.Colors;
 import com.github.webicitybrowser.thready.color.colors.RGBA8Color;
 import com.github.webicitybrowser.thready.color.format.ColorFormat;
 import com.github.webicitybrowser.thready.gui.directive.core.Directive;
@@ -28,11 +29,14 @@ public Directive[] translatePropertyValue(BackgroundValue value) {
 		List<Directive> directives = new ArrayList<>();
 
 		BackgroundLayer lastLayer = value.layer().get(value.layer().size() - 1);
+
 		if (lastLayer.color() != null) {
 			directives.add(BackgroundColorDirective.of(createColorFrom(lastLayer.color())));
+		} else {
+			directives.add(BackgroundColorDirective.of(Colors.TRANSPARENT));
 		}
 
-		return directives.toArray(new Directive[0]);
+		return directives.toArray(Directive[]::new);
 	}
 
 	@Override