Use tighter typing in editing: CompositeEditCommand

Source/core/editing/CompositeEditCommand.h

 /*
  * Copyright (C) 2005, 2006, 2008 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "core/CSSPropertyNames.h"
 #include "core/editing/EditCommand.h"
 #include "core/editing/UndoStep.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class EditingStyle;
 class Element;
+class HTMLBRElement;
 class HTMLElement;
 class Text;
 
 class EditCommandComposition FINAL : public UndoStep {
 public:
     static PassRefPtrWillBeRawPtr<EditCommandComposition> create(Document*, const VisibleSelection&, const VisibleSelection&, EditAction);
 
     virtual bool belongsTo(const LocalFrame&) const OVERRIDE;
     virtual void unapply() OVERRIDE;
     virtual void reapply() OVERRIDE;
@@ skipping 86 matching lines @@
     void setNodeAttribute(PassRefPtrWillBeRawPtr<Element>, const QualifiedName& attribute, const AtomicString& value);
     void splitElement(PassRefPtrWillBeRawPtr<Element>, PassRefPtrWillBeRawPtr<Node> atChild);
     void splitTextNode(PassRefPtrWillBeRawPtr<Text>, unsigned offset);
     void splitTextNodeContainingElement(PassRefPtrWillBeRawPtr<Text>, unsigned offset);
     void wrapContentsInDummySpan(PassRefPtrWillBeRawPtr<Element>);
 
     void deleteInsignificantText(PassRefPtrWillBeRawPtr<Text>, unsigned start, unsigned end);
     void deleteInsignificantText(const Position& start, const Position& end);
     void deleteInsignificantTextDownstream(const Position&);
 
-    PassRefPtrWillBeRawPtr<Node> appendBlockPlaceholder(PassRefPtrWillBeRawPtr<Element>);
-    PassRefPtrWillBeRawPtr<Node> insertBlockPlaceholder(const Position&);
-    PassRefPtrWillBeRawPtr<Node> addBlockPlaceholderIfNeeded(Element*);
+    PassRefPtrWillBeRawPtr<HTMLBRElement> appendBlockPlaceholder(PassRefPtrWillBeRawPtr<Element>);
+    PassRefPtrWillBeRawPtr<HTMLBRElement> insertBlockPlaceholder(const Position&);
+    PassRefPtrWillBeRawPtr<HTMLBRElement> addBlockPlaceholderIfNeeded(Element*);
     void removePlaceholderAt(const Position&);
 
-    PassRefPtrWillBeRawPtr<Element> insertNewDefaultParagraphElementAt(const Position&);
+    PassRefPtrWillBeRawPtr<HTMLElement> insertNewDefaultParagraphElementAt(const Position&);
 
-    PassRefPtrWillBeRawPtr<Element> moveParagraphContentsToNewBlockIfNecessary(const Position&);
+    PassRefPtrWillBeRawPtr<HTMLElement> moveParagraphContentsToNewBlockIfNecessary(const Position&);
 
-    void pushAnchorElementDown(Node*);
+    void pushAnchorElementDown(Element*);
 
     // FIXME: preserveSelection and preserveStyle should be enums
     void moveParagraph(const VisiblePosition&, const VisiblePosition&, const VisiblePosition&, bool preserveSelection = false, bool preserveStyle = true, Node* constrainingAncestor = 0);
     void moveParagraphs(const VisiblePosition&, const VisiblePosition&, const VisiblePosition&, bool preserveSelection = false, bool preserveStyle = true, Node* constrainingAncestor = 0);
     void moveParagraphWithClones(const VisiblePosition& startOfParagraphToMove, const VisiblePosition& endOfParagraphToMove, Element* blockElement, Node* outerNode);
     void cloneParagraphUnderNewElement(const Position& start, const Position& end, Node* outerNode, Element* blockElement);
     void cleanupAfterDeletion(VisiblePosition destination = VisiblePosition());
 
     bool breakOutOfEmptyListItem();
     bool breakOutOfEmptyMailBlockquotedParagraph();
 
     Position positionAvoidingSpecialElementBoundary(const Position&);
 
     PassRefPtrWillBeRawPtr<Node> splitTreeToNode(Node*, Node*, bool splitAncestor = false);
 
     WillBeHeapVector<RefPtrWillBeMember<EditCommand> > m_commands;
 
 private:
     virtual bool isCompositeEditCommand() const OVERRIDE FINAL { return true; }
 
     RefPtrWillBeMember<EditCommandComposition> m_composition;
 };
 
 DEFINE_TYPE_CASTS(CompositeEditCommand, EditCommand, command, command->isCompositeEditCommand(), command.isCompositeEditCommand());
 
 } // namespace blink
 
 #endif // CompositeEditCommand_h