Use tighter typing in editing: EditingStyle

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 148 matching lines @@
     DECLARE_EMPTY_VIRTUAL_DESTRUCTOR_WILL_BE_REMOVED(HTMLElementEquivalent);
 public:
     static PassOwnPtrWillBeRawPtr<HTMLElementEquivalent> create(CSSPropertyID propertyID, CSSValueID primitiveValue, const HTMLQualifiedName& tagName)
     {
         return adoptPtrWillBeNoop(new HTMLElementEquivalent(propertyID, primitiveValue, tagName));
     }
 
     virtual bool matches(const Element* element) const { return !m_tagName || element->hasTagName(*m_tagName); }
     virtual bool hasAttribute() const { return false; }
     virtual bool propertyExistsInStyle(const StylePropertySet* style) const { return style->getPropertyCSSValue(m_propertyID); }
-    virtual bool valueIsPresentInStyle(Element*, StylePropertySet*) const;
+    virtual bool valueIsPresentInStyle(HTMLElement*, StylePropertySet*) const;
     virtual void addToStyle(Element*, EditingStyle*) const;
 
     virtual void trace(Visitor* visitor) { visitor->trace(m_primitiveValue); }
 
 protected:
     HTMLElementEquivalent(CSSPropertyID);
     HTMLElementEquivalent(CSSPropertyID, const HTMLQualifiedName& tagName);
     HTMLElementEquivalent(CSSPropertyID, CSSValueID primitiveValue, const HTMLQualifiedName& tagName);
     const CSSPropertyID m_propertyID;
     const RefPtrWillBeMember<CSSPrimitiveValue> m_primitiveValue;
@@ skipping 15 matching lines @@
 }
 
 HTMLElementEquivalent::HTMLElementEquivalent(CSSPropertyID id, CSSValueID primitiveValue, const HTMLQualifiedName& tagName)
     : m_propertyID(id)
     , m_primitiveValue(CSSPrimitiveValue::createIdentifier(primitiveValue))
     , m_tagName(&tagName)
 {
     ASSERT(primitiveValue != CSSValueInvalid);
 }
 
-bool HTMLElementEquivalent::valueIsPresentInStyle(Element* element, StylePropertySet* style) const
+bool HTMLElementEquivalent::valueIsPresentInStyle(HTMLElement* element, StylePropertySet* style) const
 {
     RefPtrWillBeRawPtr<CSSValue> value = style->getPropertyCSSValue(m_propertyID);
     return matches(element) && value && value->isPrimitiveValue() && toCSSPrimitiveValue(value.get())->getValueID() == m_primitiveValue->getValueID();
 }
 
 void HTMLElementEquivalent::addToStyle(Element*, EditingStyle* style) const
 {
     style->setProperty(m_propertyID, m_primitiveValue->cssText());
 }
 
 class HTMLTextDecorationEquivalent FINAL : public HTMLElementEquivalent {
 public:
     static PassOwnPtrWillBeRawPtr<HTMLElementEquivalent> create(CSSValueID primitiveValue, const HTMLQualifiedName& tagName)
     {
         return adoptPtrWillBeNoop(new HTMLTextDecorationEquivalent(primitiveValue, tagName));
     }
     virtual bool propertyExistsInStyle(const StylePropertySet*) const OVERRIDE;
-    virtual bool valueIsPresentInStyle(Element*, StylePropertySet*) const OVERRIDE;
+    virtual bool valueIsPresentInStyle(HTMLElement*, StylePropertySet*) const OVERRIDE;
 
     virtual void trace(Visitor* visitor) OVERRIDE { HTMLElementEquivalent::trace(visitor); }
 
 private:
     HTMLTextDecorationEquivalent(CSSValueID primitiveValue, const HTMLQualifiedName& tagName);
 };
 
 HTMLTextDecorationEquivalent::HTMLTextDecorationEquivalent(CSSValueID primitiveValue, const HTMLQualifiedName& tagName)
     : HTMLElementEquivalent(textDecorationPropertyForEditing(), primitiveValue, tagName)
     // m_propertyID is used in HTMLElementEquivalent::addToStyle
 {
 }
 
 bool HTMLTextDecorationEquivalent::propertyExistsInStyle(const StylePropertySet* style) const
 {
     return style->getPropertyCSSValue(CSSPropertyWebkitTextDecorationsInEffect)
         || style->getPropertyCSSValue(textDecorationPropertyForEditing());
 }
 
-bool HTMLTextDecorationEquivalent::valueIsPresentInStyle(Element* element, StylePropertySet* style) const
+bool HTMLTextDecorationEquivalent::valueIsPresentInStyle(HTMLElement* element, StylePropertySet* style) const
 {
     RefPtrWillBeRawPtr<CSSValue> styleValue = style->getPropertyCSSValue(CSSPropertyWebkitTextDecorationsInEffect);
     if (!styleValue)
         styleValue = style->getPropertyCSSValue(textDecorationPropertyForEditing());
     return matches(element) && styleValue && styleValue->isValueList() && toCSSValueList(styleValue.get())->hasValue(m_primitiveValue.get());
 }
 
 class HTMLAttributeEquivalent : public HTMLElementEquivalent {
 public:
     static PassOwnPtrWillBeRawPtr<HTMLAttributeEquivalent> create(CSSPropertyID propertyID, const HTMLQualifiedName& tagName, const QualifiedName& attrName)
     {
         return adoptPtrWillBeNoop(new HTMLAttributeEquivalent(propertyID, tagName, attrName));
     }
     static PassOwnPtrWillBeRawPtr<HTMLAttributeEquivalent> create(CSSPropertyID propertyID, const QualifiedName& attrName)
     {
         return adoptPtrWillBeNoop(new HTMLAttributeEquivalent(propertyID, attrName));
     }
 
-    virtual bool matches(const Element* elem) const OVERRIDE { return HTMLElementEquivalent::matches(elem) && elem->hasAttribute(m_attrName); }
+    virtual bool matches(const Element* element) const OVERRIDE { return HTMLElementEquivalent::matches(element) && element->hasAttribute(m_attrName); }
     virtual bool hasAttribute() const OVERRIDE { return true; }
-    virtual bool valueIsPresentInStyle(Element*, StylePropertySet*) const OVERRIDE;
+    virtual bool valueIsPresentInStyle(HTMLElement*, StylePropertySet*) const OVERRIDE;
     virtual void addToStyle(Element*, EditingStyle*) const OVERRIDE;
     virtual PassRefPtrWillBeRawPtr<CSSValue> attributeValueAsCSSValue(Element*) const;
     inline const QualifiedName& attributeName() const { return m_attrName; }
 
     virtual void trace(Visitor* visitor) OVERRIDE { HTMLElementEquivalent::trace(visitor); }
 
 protected:
     HTMLAttributeEquivalent(CSSPropertyID, const HTMLQualifiedName& tagName, const QualifiedName& attrName);
     HTMLAttributeEquivalent(CSSPropertyID, const QualifiedName& attrName);
     const QualifiedName& m_attrName; // We can store a reference because HTML attribute names are const global.
 };
 
 HTMLAttributeEquivalent::HTMLAttributeEquivalent(CSSPropertyID id, const HTMLQualifiedName& tagName, const QualifiedName& attrName)
     : HTMLElementEquivalent(id, tagName)
     , m_attrName(attrName)
 {
 }
 
 HTMLAttributeEquivalent::HTMLAttributeEquivalent(CSSPropertyID id, const QualifiedName& attrName)
     : HTMLElementEquivalent(id)
     , m_attrName(attrName)
 {
 }
 
-bool HTMLAttributeEquivalent::valueIsPresentInStyle(Element* element, StylePropertySet* style) const
+bool HTMLAttributeEquivalent::valueIsPresentInStyle(HTMLElement* element, StylePropertySet* style) const
 {
     RefPtrWillBeRawPtr<CSSValue> value = attributeValueAsCSSValue(element);
     RefPtrWillBeRawPtr<CSSValue> styleValue = style->getPropertyCSSValue(m_propertyID);
 
     return compareCSSValuePtr(value, styleValue);
 }
 
 void HTMLAttributeEquivalent::addToStyle(Element* element, EditingStyle* style) const
 {
     if (RefPtrWillBeRawPtr<CSSValue> value = attributeValueAsCSSValue(element))
@@ skipping 45 matching lines @@
 }
 
 float EditingStyle::NoFontDelta = 0.0f;
 
 EditingStyle::EditingStyle()
     : m_fixedPitchFontType(NonFixedPitchFont)
     , m_fontSizeDelta(NoFontDelta)
 {
 }
 
-EditingStyle::EditingStyle(Node* node, PropertiesToInclude propertiesToInclude)
+EditingStyle::EditingStyle(ContainerNode* node, PropertiesToInclude propertiesToInclude)
     : m_fixedPitchFontType(NonFixedPitchFont)
     , m_fontSizeDelta(NoFontDelta)
 {
     init(node, propertiesToInclude);
 }
 
 EditingStyle::EditingStyle(const Position& position, PropertiesToInclude propertiesToInclude)
     : m_fixedPitchFontType(NonFixedPitchFont)
     , m_fontSizeDelta(NoFontDelta)
 {
@@ skipping 254 matching lines @@
 }
 
 void EditingStyle::removeBlockProperties()
 {
     if (!m_mutableStyle)
         return;
 
     m_mutableStyle->removeBlockProperties();
 }
 
-void EditingStyle::removeStyleAddedByNode(Node* node)
+void EditingStyle::removeStyleAddedByElement(Element* element)
 {
-    if (!node || !node->parentNode())
+    if (!element || !element->parentNode())
         return;
-    RefPtrWillBeRawPtr<MutableStylePropertySet> parentStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(node->parentNode()), AllEditingProperties);
-    RefPtrWillBeRawPtr<MutableStylePropertySet> nodeStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(node), AllEditingProperties);
+    RefPtrWillBeRawPtr<MutableStylePropertySet> parentStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(element->parentNode()), AllEditingProperties);
+    RefPtrWillBeRawPtr<MutableStylePropertySet> nodeStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(element), AllEditingProperties);
     nodeStyle->removeEquivalentProperties(parentStyle.get());
     m_mutableStyle->removeEquivalentProperties(nodeStyle.get());
 }
 
-void EditingStyle::removeStyleConflictingWithStyleOfNode(Node* node)
+void EditingStyle::removeStyleConflictingWithStyleOfElement(Element* element)
 {
-    if (!node || !node->parentNode() || !m_mutableStyle)
+    if (!element || !element->parentNode() || !m_mutableStyle)
         return;
 
-    RefPtrWillBeRawPtr<MutableStylePropertySet> parentStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(node->parentNode()), AllEditingProperties);
-    RefPtrWillBeRawPtr<MutableStylePropertySet> nodeStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(node), AllEditingProperties);
+    RefPtrWillBeRawPtr<MutableStylePropertySet> parentStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(element->parentNode()), AllEditingProperties);
+    RefPtrWillBeRawPtr<MutableStylePropertySet> nodeStyle = editingStyleFromComputedStyle(CSSComputedStyleDeclaration::create(element), AllEditingProperties);
     nodeStyle->removeEquivalentProperties(parentStyle.get());
 
     unsigned propertyCount = nodeStyle->propertyCount();
     for (unsigned i = 0; i < propertyCount; ++i)
         m_mutableStyle->removeProperty(nodeStyle->propertyAt(i).id());
 }
 
 void EditingStyle::collapseTextDecorationProperties()
 {
     if (!m_mutableStyle)
@@ skipping 68 matching lines @@
                 }
             }
         }
         if (node == selection.end().deprecatedNode())
             break;
     }
 
     return state;
 }
 
-bool EditingStyle::conflictsWithInlineStyleOfElement(Element* element, EditingStyle* extractedStyle, Vector<CSSPropertyID>* conflictingProperties) const
+bool EditingStyle::conflictsWithInlineStyleOfElement(HTMLElement* element, EditingStyle* extractedStyle, Vector<CSSPropertyID>* conflictingProperties) const
 {
     ASSERT(element);
     ASSERT(!conflictingProperties || conflictingProperties->isEmpty());
 
     const StylePropertySet* inlineStyle = element->inlineStyle();
     if (!m_mutableStyle || !inlineStyle)
         return false;
 
     unsigned propertyCount = m_mutableStyle->propertyCount();
     for (unsigned i = 0; i < propertyCount; ++i) {
@@ skipping 236 matching lines @@
 {
     ASSERT(document);
 
     RefPtrWillBeRawPtr<EditingStyle> typingStyle = document->frame()->selection().typingStyle();
     if (!typingStyle || typingStyle == this)
         return;
 
     mergeStyle(typingStyle->style(), OverrideValues);
 }
 
-void EditingStyle::mergeInlineStyleOfElement(Element* element, CSSPropertyOverrideMode mode, PropertiesToInclude propertiesToInclude)
+void EditingStyle::mergeInlineStyleOfElement(HTMLElement* element, CSSPropertyOverrideMode mode, PropertiesToInclude propertiesToInclude)
 {
     ASSERT(element);
     if (!element->inlineStyle())
         return;
 
     switch (propertiesToInclude) {
     case AllProperties:
         mergeStyle(element->inlineStyle(), mode);
         return;
     case OnlyEditingInheritableProperties:
@@ skipping 48 matching lines @@
 
     const WillBeHeapVector<OwnPtrWillBeMember<HTMLAttributeEquivalent> >& attributeEquivalents = htmlAttributeEquivalents();
     for (size_t i = 0; i < attributeEquivalents.size(); ++i) {
         if (attributeEquivalents[i]->attributeName() == HTMLNames::dirAttr)
             continue; // We don't want to include directionality
         if (elementMatchesAndPropertyIsNotInInlineStyleDecl(attributeEquivalents[i].get(), element, mode, m_mutableStyle.get()))
             attributeEquivalents[i]->addToStyle(element, this);
     }
 }
 
-PassRefPtrWillBeRawPtr<EditingStyle> EditingStyle::wrappingStyleForSerialization(Node* context, bool shouldAnnotate)
+PassRefPtrWillBeRawPtr<EditingStyle> EditingStyle::wrappingStyleForSerialization(ContainerNode* context, bool shouldAnnotate)
 {
     RefPtrWillBeRawPtr<EditingStyle> wrappingStyle = nullptr;
     if (shouldAnnotate) {
         wrappingStyle = EditingStyle::create(context, EditingStyle::EditingPropertiesInEffect);
 
         // Styles that Mail blockquotes contribute should only be placed on the Mail blockquote,
         // to help us differentiate those styles from ones that the user has applied.
         // This helps us get the color of content pasted into blockquotes right.
-        wrappingStyle->removeStyleAddedByNode(enclosingNodeOfType(firstPositionInOrBeforeNode(context), isMailHTMLBlockquoteElement, CanCrossEditingBoundary));
+        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.release();
     }
 
     wrappingStyle = EditingStyle::create();
 
     // When not annotating for interchange, we only preserve inline style declarations.
-    for (Node* node = context; node && !node->isDocumentNode(); node = node->parentNode()) {
+    for (ContainerNode* node = context; node && !node->isDocumentNode(); node = node->parentNode()) {
         if (node->isStyledElement() && !isMailHTMLBlockquoteElement(node)) {
             wrappingStyle->mergeInlineAndImplicitStyleOfElement(toElement(node), EditingStyle::DoNotOverrideValues,
                 EditingStyle::EditingPropertiesInEffect);
         }
     }
 
     return wrappingStyle.release();
 }
 
 
@@ skipping 89 matching lines @@
 static void removePropertiesInStyle(MutableStylePropertySet* styleToRemovePropertiesFrom, StylePropertySet* style)
 {
     unsigned propertyCount = style->propertyCount();
     Vector<CSSPropertyID> propertiesToRemove(propertyCount);
     for (unsigned i = 0; i < propertyCount; ++i)
         propertiesToRemove[i] = style->propertyAt(i).id();
 
     styleToRemovePropertiesFrom->removePropertiesInSet(propertiesToRemove.data(), propertiesToRemove.size());
 }
 
-void EditingStyle::removeStyleFromRulesAndContext(Element* element, Node* context)
+void EditingStyle::removeStyleFromRulesAndContext(Element* element, ContainerNode* context)
 {
     ASSERT(element);
     if (!m_mutableStyle)
         return;
 
     // 1. Remove style from matched rules because style remain without repeating it in inline style declaration
     RefPtrWillBeRawPtr<MutableStylePropertySet> styleFromMatchedRules = styleFromMatchedRulesForElement(element, StyleResolver::AllButEmptyCSSRules);
     if (styleFromMatchedRules && !styleFromMatchedRules->isEmpty())
         m_mutableStyle = getPropertiesNotIn(m_mutableStyle.get(), styleFromMatchedRules->ensureCSSStyleDeclaration());
 
@@ skipping 148 matching lines @@
 
     // 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())
             continue;
 
-        RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> style = CSSComputedStyleDeclaration::create(node);
+        Element* element = toElement(node);
+        RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> style = CSSComputedStyleDeclaration::create(element);
         RefPtrWillBeRawPtr<CSSValue> unicodeBidi = style->getPropertyCSSValue(CSSPropertyUnicodeBidi);
         if (!unicodeBidi || !unicodeBidi->isPrimitiveValue())
             continue;
 
         CSSValueID unicodeBidiValue = toCSSPrimitiveValue(unicodeBidi.get())->getValueID();
         if (unicodeBidiValue == CSSValueNormal)
             continue;
 
         if (unicodeBidiValue == CSSValueBidiOverride)
             return NaturalWritingDirection;
 
         ASSERT(unicodeBidiValue == CSSValueEmbed);
         RefPtrWillBeRawPtr<CSSValue> direction = style->getPropertyCSSValue(CSSPropertyDirection);
         if (!direction || !direction->isPrimitiveValue())
             continue;
 
         int directionValue = toCSSPrimitiveValue(direction.get())->getValueID();
         if (directionValue != CSSValueLtr && directionValue != CSSValueRtl)
             continue;
 
         if (foundDirection != NaturalWritingDirection)
             return NaturalWritingDirection;
 
         // In the range case, make sure that the embedding element persists until the end of the range.
-        if (selection.isRange() && !end.deprecatedNode()->isDescendantOf(node))
+        if (selection.isRange() && !end.deprecatedNode()->isDescendantOf(element))
             return NaturalWritingDirection;
 
         foundDirection = directionValue == CSSValueLtr ? LeftToRightWritingDirection : RightToLeftWritingDirection;
     }
     hasNestedOrMultipleEmbeddings = false;
     return foundDirection;
 }
 
 void EditingStyle::trace(Visitor* visitor)
 {
@@ skipping 280 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         RefPtrWillBeRawPtr<CSSComputedStyleDeclaration> ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle.get()))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return nullptr;
 }
 
 }