WebCore/editing/MergeIdenticalElementsCommand.cpp

   1 /*
   2  * Copyright (C) 2005, 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 #include "config.h"
  27 #include "MergeIdenticalElementsCommand.h"
  28
  29 #include "Element.h"
  30
  31 namespace WebCore {
  32
  33 MergeIdenticalElementsCommand::MergeIdenticalElementsCommand(PassRefPtr<Element> first, PassRefPtr<Element> second)
  34     : SimpleEditCommand(first->document())
  35     , m_element1(first)
  36     , m_element2(second)
  37 {
  38     ASSERT(m_element1);
  39     ASSERT(m_element2);
  40     ASSERT(m_element1->nextSibling() == m_element2);
  41 }
  42
  43 void MergeIdenticalElementsCommand::doApply()
  44 {
  45     if (m_element1->nextSibling() != m_element2 || !m_element1->isContentEditable() || !m_element2->isContentEditable())
  46         return;
  47
  48     m_atChild = m_element2->firstChild();
  49
  50     ExceptionCode ec = 0;
  51
  52     Vector<RefPtr<Node> > children;
  53     for (Node* child = m_element1->firstChild(); child; child = child->nextSibling())
  54         children.append(child);
  55
  56     size_t size = children.size();
  57     for (size_t i = 0; i < size; ++i)
  58         m_element2->insertBefore(children[i].release(), m_atChild.get(), ec);
  59
  60     m_element1->remove(ec);
  61 }
  62
  63 void MergeIdenticalElementsCommand::doUnapply()
  64 {
  65     ASSERT(m_element1);
  66     ASSERT(m_element2);
  67
  68     RefPtr<Node> atChild = m_atChild.release();
  69
  70     Node* parent = m_element2->parent();
  71     if (!parent || !parent->isContentEditable())
  72         return;
  73
  74     ExceptionCode ec = 0;
  75
  76     parent->insertBefore(m_element1.get(), m_element2.get(), ec);
  77     if (ec)
  78         return;
  79
  80     Vector<RefPtr<Node> > children;
  81     for (Node* child = m_element2->firstChild(); child && child != atChild; child = child->nextSibling())
  82         children.append(child);
  83
  84     size_t size = children.size();
  85     for (size_t i = 0; i < size; ++i)
  86         m_element1->appendChild(children[i].release(), ec);
  87 }
  88
  89 } // namespace WebCore