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      1 /*
      2  * Copyright (C) 2005, 2006, 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/AppendNodeCommand.h"
     28 
     29 #include "bindings/v8/ExceptionState.h"
     30 #include "core/accessibility/AXObjectCache.h"
     31 #include "core/dom/Document.h"
     32 
     33 namespace WebCore {
     34 
     35 AppendNodeCommand::AppendNodeCommand(PassRefPtr<ContainerNode> parent, PassRefPtr<Node> node)
     36     : SimpleEditCommand(parent->document())
     37     , m_parent(parent)
     38     , m_node(node)
     39 {
     40     ASSERT(m_parent);
     41     ASSERT(m_node);
     42     ASSERT(!m_node->parentNode());
     43 
     44     ASSERT(m_parent->rendererIsEditable() || !m_parent->attached());
     45 }
     46 
     47 static void sendAXTextChangedIgnoringLineBreaks(Node* node, AXObjectCache::AXTextChange textChange)
     48 {
     49     String nodeValue = node->nodeValue();
     50     // Don't consider linebreaks in this command
     51     if (nodeValue == "\n")
     52       return;
     53 
     54     if (AXObjectCache* cache = node->document()->existingAXObjectCache())
     55         cache->nodeTextChangeNotification(node, textChange, 0, nodeValue);
     56 }
     57 
     58 void AppendNodeCommand::doApply()
     59 {
     60     if (!m_parent->rendererIsEditable() && m_parent->attached())
     61         return;
     62 
     63     m_parent->appendChild(m_node.get(), IGNORE_EXCEPTION, AttachLazily);
     64 
     65     if (AXObjectCache::accessibilityEnabled())
     66         sendAXTextChangedIgnoringLineBreaks(m_node.get(), AXObjectCache::AXTextInserted);
     67 }
     68 
     69 void AppendNodeCommand::doUnapply()
     70 {
     71     if (!m_parent->rendererIsEditable())
     72         return;
     73 
     74     // Need to notify this before actually deleting the text
     75     if (AXObjectCache::accessibilityEnabled())
     76         sendAXTextChangedIgnoringLineBreaks(m_node.get(), AXObjectCache::AXTextDeleted);
     77 
     78     m_node->remove(IGNORE_EXCEPTION);
     79 }
     80 
     81 #ifndef NDEBUG
     82 void AppendNodeCommand::getNodesInCommand(HashSet<Node*>& nodes)
     83 {
     84     addNodeAndDescendants(m_parent.get(), nodes);
     85     addNodeAndDescendants(m_node.get(), nodes);
     86 }
     87 #endif
     88 
     89 } // namespace WebCore
     90