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/core/v8/ExceptionState.h" 30 #include "bindings/core/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 36 namespace blink { 37 38 SplitTextNodeCommand::SplitTextNodeCommand(PassRefPtrWillBeRawPtr<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 53 void SplitTextNodeCommand::doApply() 54 { 55 ContainerNode* parent = m_text2->parentNode(); 56 if (!parent || !parent->hasEditableStyle()) 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 70 void SplitTextNodeCommand::doUnapply() 71 { 72 if (!m_text1 || !m_text1->hasEditableStyle()) 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, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing); 80 81 document().markers().copyMarkers(m_text1.get(), 0, prefixText.length(), m_text2.get(), 0); 82 m_text1->remove(ASSERT_NO_EXCEPTION); 83 } 84 85 void SplitTextNodeCommand::doReapply() 86 { 87 if (!m_text1 || !m_text2) 88 return; 89 90 ContainerNode* parent = m_text2->parentNode(); 91 if (!parent || !parent->hasEditableStyle()) 92 return; 93 94 insertText1AndTrimText2(); 95 } 96 97 void SplitTextNodeCommand::insertText1AndTrimText2() 98 { 99 TrackExceptionState exceptionState; 100 m_text2->parentNode()->insertBefore(m_text1.get(), m_text2.get(), exceptionState); 101 if (exceptionState.hadException()) 102 return; 103 m_text2->deleteData(0, m_offset, exceptionState, CharacterData::DeprecatedRecalcStyleImmediatlelyForEditing); 104 } 105 106 void SplitTextNodeCommand::trace(Visitor* visitor) 107 { 108 visitor->trace(m_text1); 109 visitor->trace(m_text2); 110 SimpleEditCommand::trace(visitor); 111 } 112 113 } // namespace blink 114