1/*
2 * Copyright (C) 2005, 2006, 2007 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/EditCommand.h"
28
29#include "core/dom/Document.h"
30#include "core/dom/NodeTraversal.h"
31#include "core/editing/CompositeEditCommand.h"
32#include "core/editing/FrameSelection.h"
33#include "core/frame/LocalFrame.h"
34
35namespace WebCore {
36
37EditCommand::EditCommand(Document& document)
38    : m_document(&document)
39    , m_parent(nullptr)
40{
41    ASSERT(m_document);
42    ASSERT(m_document->frame());
43    setStartingSelection(m_document->frame()->selection().selection());
44    setEndingSelection(m_startingSelection);
45}
46
47EditCommand::EditCommand(Document* document, const VisibleSelection& startingSelection, const VisibleSelection& endingSelection)
48    : m_document(document)
49    , m_parent(nullptr)
50{
51    ASSERT(m_document);
52    ASSERT(m_document->frame());
53    setStartingSelection(startingSelection);
54    setEndingSelection(endingSelection);
55}
56
57EditCommand::~EditCommand()
58{
59}
60
61EditAction EditCommand::editingAction() const
62{
63    return EditActionUnspecified;
64}
65
66static inline EditCommandComposition* compositionIfPossible(EditCommand* command)
67{
68    if (!command->isCompositeEditCommand())
69        return 0;
70    return toCompositeEditCommand(command)->composition();
71}
72
73void EditCommand::setStartingSelection(const VisibleSelection& selection)
74{
75    for (EditCommand* command = this; ; command = command->m_parent) {
76        if (EditCommandComposition* composition = compositionIfPossible(command)) {
77            ASSERT(command->isTopLevelCommand());
78            composition->setStartingSelection(selection);
79        }
80        command->m_startingSelection = selection;
81        if (!command->m_parent || command->m_parent->isFirstCommand(command))
82            break;
83    }
84}
85
86void EditCommand::setStartingSelection(const VisiblePosition& position)
87{
88    setStartingSelection(VisibleSelection(position));
89}
90
91void EditCommand::setEndingSelection(const VisibleSelection& selection)
92{
93    for (EditCommand* command = this; command; command = command->m_parent) {
94        if (EditCommandComposition* composition = compositionIfPossible(command)) {
95            ASSERT(command->isTopLevelCommand());
96            composition->setEndingSelection(selection);
97        }
98        command->m_endingSelection = selection;
99    }
100}
101
102void EditCommand::setEndingSelection(const VisiblePosition& position)
103{
104    setEndingSelection(VisibleSelection(position));
105}
106
107void EditCommand::setParent(CompositeEditCommand* parent)
108{
109    ASSERT((parent && !m_parent) || (!parent && m_parent));
110    ASSERT(!parent || !isCompositeEditCommand() || !toCompositeEditCommand(this)->composition());
111    m_parent = parent;
112    if (parent) {
113        m_startingSelection = parent->m_endingSelection;
114        m_endingSelection = parent->m_endingSelection;
115    }
116}
117
118void SimpleEditCommand::doReapply()
119{
120    doApply();
121}
122
123void EditCommand::trace(Visitor* visitor)
124{
125    visitor->trace(m_document);
126    visitor->trace(m_startingSelection);
127    visitor->trace(m_endingSelection);
128    visitor->trace(m_parent);
129}
130
131} // namespace WebCore
132