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      1 /*
      2  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef ReplaceSelectionCommand_h
     27 #define ReplaceSelectionCommand_h
     28 
     29 #include "core/dom/NodeTraversal.h"
     30 #include "core/editing/CompositeEditCommand.h"
     31 
     32 namespace WebCore {
     33 
     34 class DocumentFragment;
     35 class ReplacementFragment;
     36 
     37 class ReplaceSelectionCommand FINAL : public CompositeEditCommand {
     38 public:
     39     enum CommandOption {
     40         SelectReplacement = 1 << 0,
     41         SmartReplace = 1 << 1,
     42         MatchStyle = 1 << 2,
     43         PreventNesting = 1 << 3,
     44         MovingParagraph = 1 << 4,
     45         SanitizeFragment = 1 << 5
     46     };
     47 
     48     typedef unsigned CommandOptions;
     49 
     50     static PassRefPtrWillBeRawPtr<ReplaceSelectionCommand> create(Document& document, PassRefPtrWillBeRawPtr<DocumentFragment> fragment, CommandOptions options, EditAction action = EditActionPaste)
     51     {
     52         return adoptRefWillBeNoop(new ReplaceSelectionCommand(document, fragment, options, action));
     53     }
     54 
     55     virtual void trace(Visitor*) OVERRIDE;
     56 
     57 private:
     58     ReplaceSelectionCommand(Document&, PassRefPtrWillBeRawPtr<DocumentFragment>, CommandOptions, EditAction);
     59 
     60     virtual void doApply() OVERRIDE;
     61     virtual EditAction editingAction() const OVERRIDE;
     62 
     63     class InsertedNodes {
     64         STACK_ALLOCATED();
     65     public:
     66         void respondToNodeInsertion(Node&);
     67         void willRemoveNodePreservingChildren(Node&);
     68         void willRemoveNode(Node&);
     69         void didReplaceNode(Node&, Node& newNode);
     70 
     71         Node* firstNodeInserted() const { return m_firstNodeInserted.get(); }
     72         Node* lastLeafInserted() const { return m_lastNodeInserted ? &m_lastNodeInserted->lastDescendantOrSelf() : 0; }
     73         Node* pastLastLeaf() const { return m_lastNodeInserted ? NodeTraversal::next(m_lastNodeInserted->lastDescendantOrSelf()) : 0; }
     74 
     75     private:
     76         RefPtrWillBeMember<Node> m_firstNodeInserted;
     77         RefPtrWillBeMember<Node> m_lastNodeInserted;
     78     };
     79 
     80     Node* insertAsListItems(PassRefPtrWillBeRawPtr<HTMLElement> listElement, Node* insertionNode, const Position&, InsertedNodes&);
     81 
     82     void updateNodesInserted(Node*);
     83     bool shouldRemoveEndBR(Node*, const VisiblePosition&);
     84 
     85     bool shouldMergeStart(bool, bool, bool);
     86     bool shouldMergeEnd(bool selectionEndWasEndOfParagraph);
     87     bool shouldMerge(const VisiblePosition&, const VisiblePosition&);
     88 
     89     void mergeEndIfNeeded();
     90 
     91     void removeUnrenderedTextNodesAtEnds(InsertedNodes&);
     92 
     93     void removeRedundantStylesAndKeepStyleSpanInline(InsertedNodes&);
     94     void makeInsertedContentRoundTrippableWithHTMLTreeBuilder(const InsertedNodes&);
     95     void moveNodeOutOfAncestor(PassRefPtrWillBeRawPtr<Node>, PassRefPtrWillBeRawPtr<Node> ancestor);
     96     void handleStyleSpans(InsertedNodes&);
     97 
     98     VisiblePosition positionAtStartOfInsertedContent() const;
     99     VisiblePosition positionAtEndOfInsertedContent() const;
    100 
    101     bool shouldPerformSmartReplace() const;
    102     void addSpacesForSmartReplace();
    103     void completeHTMLReplacement(const Position& lastPositionToSelect);
    104     void mergeTextNodesAroundPosition(Position&, Position& positionOnlyToBeUpdated);
    105 
    106     bool performTrivialReplace(const ReplacementFragment&);
    107 
    108     Position m_startOfInsertedContent;
    109     Position m_endOfInsertedContent;
    110     RefPtrWillBeMember<EditingStyle> m_insertionStyle;
    111     bool m_selectReplacement;
    112     bool m_smartReplace;
    113     bool m_matchStyle;
    114     RefPtrWillBeMember<DocumentFragment> m_documentFragment;
    115     bool m_preventNesting;
    116     bool m_movingParagraph;
    117     EditAction m_editAction;
    118     bool m_sanitizeFragment;
    119     bool m_shouldMergeEnd;
    120 };
    121 
    122 } // namespace WebCore
    123 
    124 #endif // ReplaceSelectionCommand_h
    125