Introduce NodeTraversal::ancestorsOf() and inclusiveAncestors() for range-based for loop

third_party/WebKit/Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1095 matching lines @@
     wrappingStyle->removeStyleAddedByElement(toHTMLElement(enclosingNodeOfType(firstPositionInOrBeforeNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary)));
 
     // Call collapseTextDecorationProperties first or otherwise it'll copy the value over from in-effect to text-decorations.
     wrappingStyle->collapseTextDecorationProperties();
 
     return wrappingStyle;
 }
 
 EditingStyle* EditingStyle::wrappingStyleForSerialization(ContainerNode* context)
 {
+    DCHECK(context);
     EditingStyle* wrappingStyle = EditingStyle::create();
 
     // When not annotating for interchange, we only preserve inline style declarations.
-    for (ContainerNode* node = context; node && !node->isDocumentNode(); node = node->parentNode()) {
-        if (node->isStyledElement() && !isMailHTMLBlockquoteElement(node)) {
-            wrappingStyle->mergeInlineAndImplicitStyleOfElement(toElement(node), EditingStyle::DoNotOverrideValues,
+    for (Node& node : NodeTraversal::inclusiveAncestorsOf(*context)) {
+        if (node.isDocumentNode())
+            break;
+        if (node.isStyledElement() && !isMailHTMLBlockquoteElement(&node)) {
+            wrappingStyle->mergeInlineAndImplicitStyleOfElement(toElement(&node), EditingStyle::DoNotOverrideValues,
                 EditingStyle::EditingPropertiesInEffect);
         }
     }
 
     return wrappingStyle;
 }
 
 static void mergeTextDecorationValues(CSSValueList* mergedValue, const CSSValueList* valueToMerge)
 {
     DEFINE_STATIC_LOCAL(CSSPrimitiveValue, underline, (CSSPrimitiveValue::createIdentifier(CSSValueUnderline)));
@@ skipping 252 matching lines @@
     }
 
     if (selection.isCaret()) {
         WritingDirection direction;
         if (typingStyle && typingStyle->textDirection(direction)) {
             hasNestedOrMultipleEmbeddings = false;
             return direction;
         }
         node = selection.visibleStart().deepEquivalent().anchorNode();
     }
+    DCHECK(node);
 
     // The selection is either a caret with no typing attributes or a range in which no embedding is added, so just use the start position
     // to decide.
     Node* block = enclosingBlock(node);
     WritingDirection foundDirection = NaturalWritingDirection;
 
-    for (; node != block; node = node->parentNode()) {
-        if (!node->isStyledElement())
+    for (Node& runner : NodeTraversal::inclusiveAncestorsOf(*node)) {
+        if (runner == block)
+            break;
+        if (!runner.isStyledElement())
             continue;
 
-        Element* element = toElement(node);
+        Element* element = &toElement(runner);
         CSSComputedStyleDeclaration* style = CSSComputedStyleDeclaration::create(element);
         CSSValue* unicodeBidi = style->getPropertyCSSValue(CSSPropertyUnicodeBidi);
         if (!unicodeBidi || !unicodeBidi->isPrimitiveValue())
             continue;
 
         CSSValueID unicodeBidiValue = toCSSPrimitiveValue(unicodeBidi)->getValueID();
         if (unicodeBidiValue == CSSValueNormal)
             continue;
 
         if (unicodeBidiValue == CSSValueBidiOverride)
@@ skipping 306 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         CSSComputedStyleDeclaration* ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 } // namespace blink