src/third_party/WebKit/Source/core/editing/DeleteSelectionCommand.h

   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 DeleteSelectionCommand_h
  27 #define DeleteSelectionCommand_h
  28
  29 #include "core/editing/CompositeEditCommand.h"
  30
  31 namespace blink {
  32
  33 class EditingStyle;
  34 class HTMLTableRowElement;
  35
  36 class DeleteSelectionCommand FINAL : public CompositeEditCommand {
  37 public:
  38     static PassRefPtrWillBeRawPtr<DeleteSelectionCommand> create(Document& document, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool expandForSpecialElements = false, bool sanitizeMarkup = true)
  39     {
  40         return adoptRefWillBeNoop(new DeleteSelectionCommand(document, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements, sanitizeMarkup));
  41     }
  42     static PassRefPtrWillBeRawPtr<DeleteSelectionCommand> create(const VisibleSelection& selection, bool smartDelete = false, bool mergeBlocksAfterDelete = true, bool expandForSpecialElements = false, bool sanitizeMarkup = true)
  43     {
  44         return adoptRefWillBeNoop(new DeleteSelectionCommand(selection, smartDelete, mergeBlocksAfterDelete, expandForSpecialElements, sanitizeMarkup));
  45     }
  46
  47     virtual void trace(Visitor*) OVERRIDE;
  48
  49 private:
  50     DeleteSelectionCommand(Document&, bool smartDelete, bool mergeBlocksAfterDelete, bool expandForSpecialElements, bool santizeMarkup);
  51     DeleteSelectionCommand(const VisibleSelection&, bool smartDelete, bool mergeBlocksAfterDelete, bool expandForSpecialElements, bool sanitizeMarkup);
  52
  53     virtual void doApply() OVERRIDE;
  54     virtual EditAction editingAction() const OVERRIDE;
  55
  56     virtual bool preservesTypingStyle() const OVERRIDE;
  57
  58     void initializeStartEnd(Position&, Position&);
  59     void setStartingSelectionOnSmartDelete(const Position&, const Position&);
  60     void initializePositionData();
  61     void saveTypingStyleState();
  62     bool handleSpecialCaseBRDelete();
  63     void handleGeneralDelete();
  64     void fixupWhitespace();
  65     void mergeParagraphs();
  66     void removePreviouslySelectedEmptyTableRows();
  67     void calculateTypingStyleAfterDelete();
  68     void clearTransientState();
  69     void makeStylingElementsDirectChildrenOfEditableRootToPreventStyleLoss();
  70     virtual void removeNode(PassRefPtrWillBeRawPtr<Node>, ShouldAssumeContentIsAlwaysEditable = DoNotAssumeContentIsAlwaysEditable) OVERRIDE;
  71     virtual void deleteTextFromNode(PassRefPtrWillBeRawPtr<Text>, unsigned, unsigned) OVERRIDE;
  72     void removeRedundantBlocks();
  73
  74     bool m_hasSelectionToDelete;
  75     bool m_smartDelete;
  76     bool m_mergeBlocksAfterDelete;
  77     bool m_needPlaceholder;
  78     bool m_expandForSpecialElements;
  79     bool m_pruneStartBlockIfNecessary;
  80     bool m_startsAtEmptyLine;
  81     bool m_sanitizeMarkup;
  82
  83     // This data is transient and should be cleared at the end of the doApply function.
  84     VisibleSelection m_selectionToDelete;
  85     Position m_upstreamStart;
  86     Position m_downstreamStart;
  87     Position m_upstreamEnd;
  88     Position m_downstreamEnd;
  89     Position m_endingPosition;
  90     Position m_leadingWhitespace;
  91     Position m_trailingWhitespace;
  92     RefPtrWillBeMember<Node> m_startBlock;
  93     RefPtrWillBeMember<Node> m_endBlock;
  94     RefPtrWillBeMember<EditingStyle> m_typingStyle;
  95     RefPtrWillBeMember<EditingStyle> m_deleteIntoBlockquoteStyle;
  96     RefPtrWillBeMember<Element> m_startRoot;
  97     RefPtrWillBeMember<Element> m_endRoot;
  98     RefPtrWillBeMember<HTMLTableRowElement> m_startTableRow;
  99     RefPtrWillBeMember<HTMLTableRowElement> m_endTableRow;
 100     RefPtrWillBeMember<Node> m_temporaryPlaceholder;
 101 };
 102
 103 } // namespace blink
 104
 105 #endif // DeleteSelectionCommand_h