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      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 "core/editing/MergeIdenticalElementsCommand.h"
     28 
     29 #include "bindings/v8/ExceptionState.h"
     30 #include "bindings/v8/ExceptionStatePlaceholder.h"
     31 #include "core/dom/Element.h"
     32 
     33 namespace WebCore {
     34 
     35 MergeIdenticalElementsCommand::MergeIdenticalElementsCommand(PassRefPtr<Element> first, PassRefPtr<Element> second)
     36     : SimpleEditCommand(first->document())
     37     , m_element1(first)
     38     , m_element2(second)
     39 {
     40     ASSERT(m_element1);
     41     ASSERT(m_element2);
     42     ASSERT(m_element1->nextSibling() == m_element2);
     43 }
     44 
     45 void MergeIdenticalElementsCommand::doApply()
     46 {
     47     if (m_element1->nextSibling() != m_element2 || !m_element1->rendererIsEditable() || !m_element2->rendererIsEditable())
     48         return;
     49 
     50     m_atChild = m_element2->firstChild();
     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(), IGNORE_EXCEPTION);
     59 
     60     m_element1->remove(IGNORE_EXCEPTION);
     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     ContainerNode* parent = m_element2->parentNode();
     71     if (!parent || !parent->rendererIsEditable())
     72         return;
     73 
     74     TrackExceptionState exceptionState;
     75 
     76     parent->insertBefore(m_element1.get(), m_element2.get(), exceptionState);
     77     if (exceptionState.hadException())
     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(), exceptionState);
     87 }
     88 
     89 } // namespace WebCore
     90