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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/page/Frame.h"
     34 
     35 namespace WebCore {
     36 
     37 EditCommand::EditCommand(Document* document)
     38     : m_document(document)
     39     , m_parent(0)
     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(0)
     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& s)
     74 {
     75     for (EditCommand* cmd = this; ; cmd = cmd->m_parent) {
     76         if (EditCommandComposition* composition = compositionIfPossible(cmd)) {
     77             ASSERT(cmd->isTopLevelCommand());
     78             composition->setStartingSelection(s);
     79         }
     80         cmd->m_startingSelection = s;
     81         if (!cmd->m_parent || cmd->m_parent->isFirstCommand(cmd))
     82             break;
     83     }
     84 }
     85 
     86 void EditCommand::setEndingSelection(const VisibleSelection &s)
     87 {
     88     for (EditCommand* cmd = this; cmd; cmd = cmd->m_parent) {
     89         if (EditCommandComposition* composition = compositionIfPossible(cmd)) {
     90             ASSERT(cmd->isTopLevelCommand());
     91             composition->setEndingSelection(s);
     92         }
     93         cmd->m_endingSelection = s;
     94     }
     95 }
     96 
     97 void EditCommand::setParent(CompositeEditCommand* parent)
     98 {
     99     ASSERT((parent && !m_parent) || (!parent && m_parent));
    100     ASSERT(!parent || !isCompositeEditCommand() || !toCompositeEditCommand(this)->composition());
    101     m_parent = parent;
    102     if (parent) {
    103         m_startingSelection = parent->m_endingSelection;
    104         m_endingSelection = parent->m_endingSelection;
    105     }
    106 }
    107 
    108 void SimpleEditCommand::doReapply()
    109 {
    110     doApply();
    111 }
    112 
    113 #ifndef NDEBUG
    114 void SimpleEditCommand::addNodeAndDescendants(Node* startNode, HashSet<Node*>& nodes)
    115 {
    116     for (Node* node = startNode; node; node = NodeTraversal::next(node, startNode))
    117         nodes.add(node);
    118 }
    119 #endif
    120 
    121 } // namespace WebCore
    122