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1 /*
2  * Copyright (C) 2005, 2006 Apple Computer, 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/MoveSelectionCommand.h"
28 
29 #include "core/dom/DocumentFragment.h"
30 #include "core/editing/ReplaceSelectionCommand.h"
31 
32 namespace blink {
33 
MoveSelectionCommand(PassRefPtrWillBeRawPtr<DocumentFragment> fragment,const Position & position,bool smartInsert,bool smartDelete)34 MoveSelectionCommand::MoveSelectionCommand(PassRefPtrWillBeRawPtr<DocumentFragment> fragment, const Position& position, bool smartInsert, bool smartDelete)
35     : CompositeEditCommand(*position.document()), m_fragment(fragment), m_position(position), m_smartInsert(smartInsert), m_smartDelete(smartDelete)
36 {
37     ASSERT(m_fragment);
38 }
39 
doApply()40 void MoveSelectionCommand::doApply()
41 {
42     ASSERT(endingSelection().isNonOrphanedRange());
43 
44     Position pos = m_position;
45     if (pos.isNull())
46         return;
47 
48     // Update the position otherwise it may become invalid after the selection is deleted.
49     Position selectionEnd = endingSelection().end();
50     if (pos.anchorType() == Position::PositionIsOffsetInAnchor && selectionEnd.anchorType() == Position::PositionIsOffsetInAnchor
51         && selectionEnd.containerNode() == pos.containerNode() && selectionEnd.offsetInContainerNode() < pos.offsetInContainerNode()) {
52         pos.moveToOffset(pos.offsetInContainerNode() - selectionEnd.offsetInContainerNode());
53 
54         Position selectionStart = endingSelection().start();
55         if (selectionStart.anchorType() == Position::PositionIsOffsetInAnchor && selectionStart.containerNode() == pos.containerNode())
56             pos.moveToOffset(pos.offsetInContainerNode() + selectionStart.offsetInContainerNode());
57     }
58 
59     deleteSelection(m_smartDelete);
60 
61     // If the node for the destination has been removed as a result of the deletion,
62     // set the destination to the ending point after the deletion.
63     // Fixes: <rdar://problem/3910425> REGRESSION (Mail): Crash in ReplaceSelectionCommand;
64     //        selection is empty, leading to null deref
65     if (!pos.inDocument())
66         pos = endingSelection().start();
67 
68     cleanupAfterDeletion(VisiblePosition(pos));
69 
70     setEndingSelection(VisibleSelection(pos, endingSelection().affinity(), endingSelection().isDirectional()));
71     if (!pos.inDocument()) {
72         // Document was modified out from under us.
73         return;
74     }
75     ReplaceSelectionCommand::CommandOptions options = ReplaceSelectionCommand::SelectReplacement | ReplaceSelectionCommand::PreventNesting;
76     if (m_smartInsert)
77         options |= ReplaceSelectionCommand::SmartReplace;
78     applyCommandToComposite(ReplaceSelectionCommand::create(document(), m_fragment, options));
79 }
80 
editingAction() const81 EditAction MoveSelectionCommand::editingAction() const
82 {
83     return EditActionDrag;
84 }
85 
trace(Visitor * visitor)86 void MoveSelectionCommand::trace(Visitor* visitor)
87 {
88     visitor->trace(m_fragment);
89     visitor->trace(m_position);
90     CompositeEditCommand::trace(visitor);
91 }
92 
93 } // namespace blink
94