MoveSelectionCommand.cpp revision d8543bb6618c17b12da906afa77d216f58cf4058 
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 "MoveSelectionCommand.h"
28
29#include "DocumentFragment.h"
30#include "ReplaceSelectionCommand.h"
31
32namespace WebCore {
33
34MoveSelectionCommand::MoveSelectionCommand(PassRefPtr<DocumentFragment> fragment, const Position& position, bool smartMove)
35    : CompositeEditCommand(position.node()->document()), m_fragment(fragment), m_position(position), m_smartMove(smartMove)
36{
37    ASSERT(m_fragment);
38}
39
40MoveSelectionCommand::~MoveSelectionCommand()
41{
42}
43
44void MoveSelectionCommand::doApply()
45{
46    Selection selection = endingSelection();
47    ASSERT(selection.isRange());
48
49    Position pos = m_position;
50    if (pos.isNull())
51        return;
52
53    // Update the position otherwise it may become invalid after the selection is deleted.
54    Node *positionNode = m_position.node();
55    int positionOffset = m_position.offset();
56    Position selectionEnd = selection.end();
57    int selectionEndOffset = selectionEnd.offset();
58    if (selectionEnd.node() == positionNode && selectionEndOffset < positionOffset) {
59        positionOffset -= selectionEndOffset;
60        Position selectionStart = selection.start();
61        if (selectionStart.node() == positionNode) {
62            positionOffset += selectionStart.offset();
63        }
64        pos = Position(positionNode, positionOffset);
65    }
66
67    deleteSelection(m_smartMove);
68
69    // If the node for the destination has been removed as a result of the deletion,
70    // set the destination to the ending point after the deletion.
71    // Fixes: <rdar://problem/3910425> REGRESSION (Mail): Crash in ReplaceSelectionCommand;
72    //        selection is empty, leading to null deref
73    if (!pos.node()->inDocument())
74        pos = endingSelection().start();
75
76    setEndingSelection(Selection(pos, endingSelection().affinity()));
77    applyCommandToComposite(new ReplaceSelectionCommand(positionNode->document(), m_fragment.get(), true, m_smartMove));
78}
79
80EditAction MoveSelectionCommand::editingAction() const
81{
82    return EditActionDrag;
83}
84
85} // namespace WebCore
86