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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/SplitElementCommand.h"
     28 
     29 #include "bindings/core/v8/ExceptionState.h"
     30 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
     31 #include "core/HTMLNames.h"
     32 #include "core/dom/Element.h"
     33 #include "wtf/Assertions.h"
     34 
     35 namespace blink {
     36 
     37 SplitElementCommand::SplitElementCommand(PassRefPtrWillBeRawPtr<Element> element, PassRefPtrWillBeRawPtr<Node> atChild)
     38     : SimpleEditCommand(element->document())
     39     , m_element2(element)
     40     , m_atChild(atChild)
     41 {
     42     ASSERT(m_element2);
     43     ASSERT(m_atChild);
     44     ASSERT(m_atChild->parentNode() == m_element2);
     45 }
     46 
     47 void SplitElementCommand::executeApply()
     48 {
     49     if (m_atChild->parentNode() != m_element2)
     50         return;
     51 
     52     WillBeHeapVector<RefPtrWillBeMember<Node> > children;
     53     for (Node* node = m_element2->firstChild(); node != m_atChild; node = node->nextSibling())
     54         children.append(node);
     55 
     56     TrackExceptionState exceptionState;
     57 
     58     ContainerNode* parent = m_element2->parentNode();
     59     if (!parent || !parent->hasEditableStyle())
     60         return;
     61     parent->insertBefore(m_element1.get(), m_element2.get(), exceptionState);
     62     if (exceptionState.hadException())
     63         return;
     64 
     65     // Delete id attribute from the second element because the same id cannot be used for more than one element
     66     m_element2->removeAttribute(HTMLNames::idAttr);
     67 
     68     size_t size = children.size();
     69     for (size_t i = 0; i < size; ++i)
     70         m_element1->appendChild(children[i], exceptionState);
     71 }
     72 
     73 void SplitElementCommand::doApply()
     74 {
     75     m_element1 = m_element2->cloneElementWithoutChildren();
     76 
     77     executeApply();
     78 }
     79 
     80 void SplitElementCommand::doUnapply()
     81 {
     82     if (!m_element1 || !m_element1->hasEditableStyle() || !m_element2->hasEditableStyle())
     83         return;
     84 
     85     NodeVector children;
     86     getChildNodes(*m_element1, children);
     87 
     88     RefPtrWillBeRawPtr<Node> refChild = m_element2->firstChild();
     89 
     90     size_t size = children.size();
     91     for (size_t i = 0; i < size; ++i)
     92         m_element2->insertBefore(children[i].get(), refChild.get(), IGNORE_EXCEPTION);
     93 
     94     // Recover the id attribute of the original element.
     95     const AtomicString& id = m_element1->getAttribute(HTMLNames::idAttr);
     96     if (!id.isNull())
     97         m_element2->setAttribute(HTMLNames::idAttr, id);
     98 
     99     m_element1->remove(IGNORE_EXCEPTION);
    100 }
    101 
    102 void SplitElementCommand::doReapply()
    103 {
    104     if (!m_element1)
    105         return;
    106 
    107     executeApply();
    108 }
    109 
    110 void SplitElementCommand::trace(Visitor* visitor)
    111 {
    112     visitor->trace(m_element1);
    113     visitor->trace(m_element2);
    114     visitor->trace(m_atChild);
    115     SimpleEditCommand::trace(visitor);
    116 }
    117 
    118 } // namespace blink
    119