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/RemoveCSSPropertyCommand.h"
28
29#include "bindings/core/v8/ExceptionStatePlaceholder.h"
30#include "core/css/CSSStyleDeclaration.h"
31#include "core/css/StylePropertySet.h"
32#include "core/dom/Element.h"
33#include "wtf/Assertions.h"
34
35namespace blink {
36
37RemoveCSSPropertyCommand::RemoveCSSPropertyCommand(Document& document, PassRefPtrWillBeRawPtr<Element> element, CSSPropertyID property)
38    : SimpleEditCommand(document)
39    , m_element(element)
40    , m_property(property)
41    , m_important(false)
42{
43    ASSERT(m_element);
44}
45
46RemoveCSSPropertyCommand::~RemoveCSSPropertyCommand()
47{
48}
49
50void RemoveCSSPropertyCommand::doApply()
51{
52    const StylePropertySet* style = m_element->inlineStyle();
53    if (!style)
54        return;
55
56    m_oldValue = style->getPropertyValue(m_property);
57    m_important = style->propertyIsImportant(m_property);
58
59    // Mutate using the CSSOM wrapper so we get the same event behavior as a script.
60    // Setting to null string removes the property. We don't have internal version of removeProperty.
61    m_element->style()->setPropertyInternal(m_property, String(), false, IGNORE_EXCEPTION);
62}
63
64void RemoveCSSPropertyCommand::doUnapply()
65{
66    m_element->style()->setPropertyInternal(m_property, m_oldValue, m_important, IGNORE_EXCEPTION);
67}
68
69void RemoveCSSPropertyCommand::trace(Visitor* visitor)
70{
71    visitor->trace(m_element);
72    SimpleEditCommand::trace(visitor);
73}
74
75} // namespace blink
76