1/*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 * Copyright (C) 2017 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Neither the name of Google Inc. nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "config.h"
29#include "PseudoElement.h"
30
31#include "CSSAnimationController.h"
32#include "ContentData.h"
33#include "DocumentTimeline.h"
34#include "InspectorInstrumentation.h"
35#include "RenderElement.h"
36#include "RenderImage.h"
37#include "RenderQuote.h"
38#include "RuntimeEnabledFeatures.h"
39#include "StyleResolver.h"
40#include <wtf/IsoMallocInlines.h>
41
42namespace WebCore {
43
44WTF_MAKE_ISO_ALLOCATED_IMPL(PseudoElement);
45
46const QualifiedName& pseudoElementTagName()
47{
48 static NeverDestroyed<QualifiedName> name(nullAtom(), "<pseudo>", nullAtom());
49 return name;
50}
51
52String PseudoElement::pseudoElementNameForEvents(PseudoId pseudoId)
53{
54 static NeverDestroyed<const String> after(MAKE_STATIC_STRING_IMPL("::after"));
55 static NeverDestroyed<const String> before(MAKE_STATIC_STRING_IMPL("::before"));
56 switch (pseudoId) {
57 case PseudoId::After:
58 return after;
59 case PseudoId::Before:
60 return before;
61 default:
62 return emptyString();
63 }
64}
65
66PseudoElement::PseudoElement(Element& host, PseudoId pseudoId)
67 : Element(pseudoElementTagName(), host.document(), CreatePseudoElement)
68 , m_hostElement(&host)
69 , m_pseudoId(pseudoId)
70{
71 ASSERT(pseudoId == PseudoId::Before || pseudoId == PseudoId::After);
72 setHasCustomStyleResolveCallbacks();
73}
74
75PseudoElement::~PseudoElement()
76{
77 ASSERT(!m_hostElement);
78}
79
80Ref<PseudoElement> PseudoElement::create(Element& host, PseudoId pseudoId)
81{
82 auto pseudoElement = adoptRef(*new PseudoElement(host, pseudoId));
83
84 InspectorInstrumentation::pseudoElementCreated(host.document().page(), pseudoElement.get());
85
86 return pseudoElement;
87}
88
89void PseudoElement::clearHostElement()
90{
91 InspectorInstrumentation::pseudoElementDestroyed(document().page(), *this);
92
93 if (auto* timeline = document().existingTimeline())
94 timeline->removeAnimationsForElement(*this);
95 if (auto* frame = document().frame())
96 frame->animation().cancelAnimations(*this);
97
98 m_hostElement = nullptr;
99}
100
101bool PseudoElement::rendererIsNeeded(const RenderStyle& style)
102{
103 return pseudoElementRendererIsNeeded(&style);
104}
105
106} // namespace
107