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      1 /*
      2  * Copyright (C) 2005, 2006, 2007 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 #include "config.h"
     27 #include "core/editing/EditCommand.h"
     28 
     29 #include "core/dom/Document.h"
     30 #include "core/dom/NodeTraversal.h"
     31 #include "core/editing/CompositeEditCommand.h"
     32 #include "core/editing/FrameSelection.h"
     33 #include "core/frame/LocalFrame.h"
     34 
     35 namespace blink {
     36 
     37 EditCommand::EditCommand(Document& document)
     38     : m_document(&document)
     39     , m_parent(nullptr)
     40 {
     41     ASSERT(m_document);
     42     ASSERT(m_document->frame());
     43     setStartingSelection(m_document->frame()->selection().selection());
     44     setEndingSelection(m_startingSelection);
     45 }
     46 
     47 EditCommand::EditCommand(Document* document, const VisibleSelection& startingSelection, const VisibleSelection& endingSelection)
     48     : m_document(document)
     49     , m_parent(nullptr)
     50 {
     51     ASSERT(m_document);
     52     ASSERT(m_document->frame());
     53     setStartingSelection(startingSelection);
     54     setEndingSelection(endingSelection);
     55 }
     56 
     57 EditCommand::~EditCommand()
     58 {
     59 }
     60 
     61 EditAction EditCommand::editingAction() const
     62 {
     63     return EditActionUnspecified;
     64 }
     65 
     66 static inline EditCommandComposition* compositionIfPossible(EditCommand* command)
     67 {
     68     if (!command->isCompositeEditCommand())
     69         return 0;
     70     return toCompositeEditCommand(command)->composition();
     71 }
     72 
     73 void EditCommand::setStartingSelection(const VisibleSelection& selection)
     74 {
     75     for (EditCommand* command = this; ; command = command->m_parent) {
     76         if (EditCommandComposition* composition = compositionIfPossible(command)) {
     77             ASSERT(command->isTopLevelCommand());
     78             composition->setStartingSelection(selection);
     79         }
     80         command->m_startingSelection = selection;
     81         if (!command->m_parent || command->m_parent->isFirstCommand(command))
     82             break;
     83     }
     84 }
     85 
     86 void EditCommand::setStartingSelection(const VisiblePosition& position)
     87 {
     88     setStartingSelection(VisibleSelection(position));
     89 }
     90 
     91 void EditCommand::setEndingSelection(const VisibleSelection& selection)
     92 {
     93     for (EditCommand* command = this; command; command = command->m_parent) {
     94         if (EditCommandComposition* composition = compositionIfPossible(command)) {
     95             ASSERT(command->isTopLevelCommand());
     96             composition->setEndingSelection(selection);
     97         }
     98         command->m_endingSelection = selection;
     99     }
    100 }
    101 
    102 void EditCommand::setEndingSelection(const VisiblePosition& position)
    103 {
    104     setEndingSelection(VisibleSelection(position));
    105 }
    106 
    107 void EditCommand::setParent(CompositeEditCommand* parent)
    108 {
    109     ASSERT((parent && !m_parent) || (!parent && m_parent));
    110     ASSERT(!parent || !isCompositeEditCommand() || !toCompositeEditCommand(this)->composition());
    111     m_parent = parent;
    112     if (parent) {
    113         m_startingSelection = parent->m_endingSelection;
    114         m_endingSelection = parent->m_endingSelection;
    115     }
    116 }
    117 
    118 void SimpleEditCommand::doReapply()
    119 {
    120     doApply();
    121 }
    122 
    123 void EditCommand::trace(Visitor* visitor)
    124 {
    125     visitor->trace(m_document);
    126     visitor->trace(m_startingSelection);
    127     visitor->trace(m_endingSelection);
    128     visitor->trace(m_parent);
    129 }
    130 
    131 } // namespace blink
    132