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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/DeleteFromTextNodeCommand.h"
     28 
     29 #include "bindings/core/v8/ExceptionState.h"
     30 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
     31 #include "core/dom/Text.h"
     32 
     33 namespace blink {
     34 
     35 DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(PassRefPtrWillBeRawPtr<Text> node, unsigned offset, unsigned count)
     36     : SimpleEditCommand(node->document())
     37     , m_node(node)
     38     , m_offset(offset)
     39     , m_count(count)
     40 {
     41     ASSERT(m_node);
     42     ASSERT(m_offset <= m_node->length());
     43     ASSERT(m_offset + m_count <= m_node->length());
     44 }
     45 
     46 void DeleteFromTextNodeCommand::doApply()
     47 {
     48     ASSERT(m_node);
     49 
     50     if (!m_node->isContentEditable(Node::UserSelectAllIsAlwaysNonEditable))
     51         return;
     52 
     53     TrackExceptionState exceptionState;
     54     m_text = m_node->substringData(m_offset, m_count, exceptionState);
     55     if (exceptionState.hadException())
     56         return;
     57 
     58     m_node->deleteData(m_offset, m_count, exceptionState, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing);
     59 }
     60 
     61 void DeleteFromTextNodeCommand::doUnapply()
     62 {
     63     ASSERT(m_node);
     64 
     65     if (!m_node->hasEditableStyle())
     66         return;
     67 
     68     m_node->insertData(m_offset, m_text, IGNORE_EXCEPTION, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing);
     69 }
     70 
     71 void DeleteFromTextNodeCommand::trace(Visitor* visitor)
     72 {
     73     visitor->trace(m_node);
     74     SimpleEditCommand::trace(visitor);
     75 }
     76 
     77 } // namespace blink
     78