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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 "SplitElementCommand.h"
     28 
     29 #include "Element.h"
     30 #include "HTMLNames.h"
     31 #include <wtf/Assertions.h>
     32 
     33 namespace WebCore {
     34 
     35 SplitElementCommand::SplitElementCommand(PassRefPtr<Element> element, PassRefPtr<Node> atChild)
     36     : SimpleEditCommand(element->document())
     37     , m_element2(element)
     38     , m_atChild(atChild)
     39 {
     40     ASSERT(m_element2);
     41     ASSERT(m_atChild);
     42     ASSERT(m_atChild->parentNode() == m_element2);
     43 }
     44 
     45 void SplitElementCommand::executeApply()
     46 {
     47     if (m_atChild->parentNode() != m_element2)
     48         return;
     49 
     50     Vector<RefPtr<Node> > children;
     51     for (Node* node = m_element2->firstChild(); node != m_atChild; node = node->nextSibling())
     52         children.append(node);
     53 
     54     ExceptionCode ec = 0;
     55 
     56     ContainerNode* parent = m_element2->parentNode();
     57     if (!parent || !parent->rendererIsEditable())
     58         return;
     59     parent->insertBefore(m_element1.get(), m_element2.get(), ec);
     60     if (ec)
     61         return;
     62 
     63     // Delete id attribute from the second element because the same id cannot be used for more than one element
     64     m_element2->removeAttribute(HTMLNames::idAttr, ec);
     65     ASSERT(!ec);
     66 
     67     size_t size = children.size();
     68     for (size_t i = 0; i < size; ++i)
     69         m_element1->appendChild(children[i], ec);
     70 }
     71 
     72 void SplitElementCommand::doApply()
     73 {
     74     m_element1 = m_element2->cloneElementWithoutChildren();
     75 
     76     executeApply();
     77 }
     78 
     79 void SplitElementCommand::doUnapply()
     80 {
     81     if (!m_element1 || !m_element1->rendererIsEditable() || !m_element2->rendererIsEditable())
     82         return;
     83 
     84     Vector<RefPtr<Node> > children;
     85     for (Node* node = m_element1->firstChild(); node; node = node->nextSibling())
     86         children.append(node);
     87 
     88     RefPtr<Node> refChild = m_element2->firstChild();
     89 
     90     ExceptionCode ec = 0;
     91 
     92     size_t size = children.size();
     93     for (size_t i = 0; i < size; ++i)
     94         m_element2->insertBefore(children[i].get(), refChild.get(), ec);
     95 
     96     // Recover the id attribute of the original element.
     97     if (m_element1->hasAttribute(HTMLNames::idAttr))
     98         m_element2->setAttribute(HTMLNames::idAttr, m_element1->getAttribute(HTMLNames::idAttr));
     99 
    100     m_element1->remove(ec);
    101 }
    102 
    103 void SplitElementCommand::doReapply()
    104 {
    105     if (!m_element1)
    106         return;
    107 
    108     executeApply();
    109 }
    110 
    111 } // namespace WebCore
    112