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/SplitTextNodeCommand.h" 28 29#include "bindings/v8/ExceptionState.h" 30#include "bindings/v8/ExceptionStatePlaceholder.h" 31#include "core/dom/Document.h" 32#include "core/dom/DocumentMarkerController.h" 33#include "core/dom/Text.h" 34#include "wtf/Assertions.h" 35 36namespace WebCore { 37 38SplitTextNodeCommand::SplitTextNodeCommand(PassRefPtr<Text> text, int offset) 39 : SimpleEditCommand(text->document()) 40 , m_text2(text) 41 , m_offset(offset) 42{ 43 // NOTE: Various callers rely on the fact that the original node becomes 44 // the second node (i.e. the new node is inserted before the existing one). 45 // That is not a fundamental dependency (i.e. it could be re-coded), but 46 // rather is based on how this code happens to work. 47 ASSERT(m_text2); 48 ASSERT(m_text2->length() > 0); 49 ASSERT(m_offset > 0); 50 ASSERT(m_offset < m_text2->length()); 51} 52 53void SplitTextNodeCommand::doApply() 54{ 55 ContainerNode* parent = m_text2->parentNode(); 56 if (!parent || !parent->rendererIsEditable()) 57 return; 58 59 String prefixText = m_text2->substringData(0, m_offset, IGNORE_EXCEPTION); 60 if (prefixText.isEmpty()) 61 return; 62 63 m_text1 = Text::create(document(), prefixText); 64 ASSERT(m_text1); 65 document()->markers()->copyMarkers(m_text2.get(), 0, m_offset, m_text1.get(), 0); 66 67 insertText1AndTrimText2(); 68} 69 70void SplitTextNodeCommand::doUnapply() 71{ 72 if (!m_text1 || !m_text1->rendererIsEditable()) 73 return; 74 75 ASSERT(m_text1->document() == document()); 76 77 String prefixText = m_text1->data(); 78 79 m_text2->insertData(0, prefixText, ASSERT_NO_EXCEPTION); 80 81 document()->markers()->copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0); 82 m_text1->remove(ASSERT_NO_EXCEPTION); 83} 84 85void SplitTextNodeCommand::doReapply() 86{ 87 if (!m_text1 || !m_text2) 88 return; 89 90 ContainerNode* parent = m_text2->parentNode(); 91 if (!parent || !parent->rendererIsEditable()) 92 return; 93 94 insertText1AndTrimText2(); 95} 96 97void SplitTextNodeCommand::insertText1AndTrimText2() 98{ 99 TrackExceptionState es; 100 m_text2->parentNode()->insertBefore(m_text1.get(), m_text2.get(), es); 101 if (es.hadException()) 102 return; 103 m_text2->deleteData(0, m_offset, es); 104} 105 106#ifndef NDEBUG 107void SplitTextNodeCommand::getNodesInCommand(HashSet<Node*>& nodes) 108{ 109 addNodeAndDescendants(m_text1.get(), nodes); 110 addNodeAndDescendants(m_text2.get(), nodes); 111} 112#endif 113 114} // namespace WebCore 115