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 smartInsert, bool smartDelete)
35    : CompositeEditCommand(position.anchorNode()->document()), m_fragment(fragment), m_position(position), m_smartInsert(smartInsert), m_smartDelete(smartDelete)
36{
37    ASSERT(m_fragment);
38}
39
40void 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.anchorNode()->inDocument())
66        pos = endingSelection().start();
67
68    cleanupAfterDeletion(pos);
69
70    setEndingSelection(VisibleSelection(pos, endingSelection().affinity(), endingSelection().isDirectional()));
71    if (!pos.anchorNode()->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
81EditAction MoveSelectionCommand::editingAction() const
82{
83    return EditActionDrag;
84}
85
86} // namespace WebCore
87