WebCore/editing/DeleteFromTextNodeCommand.cpp

   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:
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   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
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  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "DeleteFromTextNodeCommand.h"
  28
  29 #include "Text.h"
  30
  31 namespace WebCore {
  32
  33 DeleteFromTextNodeCommand::DeleteFromTextNodeCommand(PassRefPtr<Text> node, int offset, int count)
  34     : SimpleEditCommand(node->document()), m_node(node), m_offset(offset), m_count(count)
  35 {
  36     ASSERT(m_node);
  37     ASSERT(m_offset >= 0);
  38     ASSERT(m_offset < (int)m_node->length());
  39     ASSERT(m_count >= 0);
  40 }
  41
  42 void DeleteFromTextNodeCommand::doApply()
  43 {
  44     ASSERT(m_node);
  45
  46     ExceptionCode ec = 0;
  47     m_text = m_node->substringData(m_offset, m_count, ec);
  48     ASSERT(ec == 0);
  49
  50     m_node->deleteData(m_offset, m_count, ec);
  51     ASSERT(ec == 0);
  52 }
  53
  54 void DeleteFromTextNodeCommand::doUnapply()
  55 {
  56     ASSERT(m_node);
  57     ASSERT(!m_text.isEmpty());
  58
  59     ExceptionCode ec = 0;
  60     m_node->insertData(m_offset, m_text, ec);
  61     ASSERT(ec == 0);
  62 }
  63
  64 } // namespace WebCore