1 /*
2 * Copyright (C) 2012 Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Neither the name of Google Inc. nor the names of its
11 * contributors may be used to endorse or promote products derived from
12 * this software without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifndef PseudoElement_h
28 #define PseudoElement_h
29
30 #include "core/dom/Element.h"
31 #include "core/rendering/style/RenderStyle.h"
32 #include "wtf/Forward.h"
33
34 namespace WebCore {
35
36 class PseudoElement FINAL : public Element {
37 public:
create(Element * parent,PseudoId pseudoId)38 static PassRefPtr<PseudoElement> create(Element* parent, PseudoId pseudoId)
39 {
40 return adoptRef(new PseudoElement(parent, pseudoId));
41 }
42
43 virtual PassRefPtr<RenderStyle> customStyleForRenderer() OVERRIDE;
44 virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
45 virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
46
47 // As per http://dev.w3.org/csswg/css3-regions/#flow-into, pseudo-elements such as ::first-line, ::first-letter, ::before or ::after
48 // cannot be directly collected into a named flow.
shouldMoveToFlowThread(RenderStyle *)49 virtual bool shouldMoveToFlowThread(RenderStyle*) const OVERRIDE { return false; }
50
canStartSelection()51 virtual bool canStartSelection() const OVERRIDE { return false; }
canContainRangeEndPoint()52 virtual bool canContainRangeEndPoint() const OVERRIDE { return false; }
53
54 static String pseudoElementNameForEvents(PseudoId);
55
56 void dispose();
57
58 private:
59 PseudoElement(Element*, PseudoId);
60
61 virtual void didRecalcStyle(StyleRecalcChange) OVERRIDE;
customPseudoId()62 virtual PseudoId customPseudoId() const OVERRIDE { return m_pseudoId; }
63
64 PseudoId m_pseudoId;
65 };
66
67 const QualifiedName& pseudoElementTagName();
68
pseudoElementRendererIsNeeded(const RenderStyle * style)69 inline bool pseudoElementRendererIsNeeded(const RenderStyle* style)
70 {
71 return style && style->display() != NONE && (style->styleType() == BACKDROP || style->contentData() || style->hasFlowFrom());
72 }
73
74 DEFINE_NODE_TYPE_CASTS(PseudoElement, isPseudoElement());
75
76 } // namespace
77
78 #endif
79