2 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
22 #ifndef StyleResolverState_h
23 #define StyleResolverState_h
25 #include "CSSPropertyNames.h"
27 #include "core/css/CSSSVGDocumentValue.h"
28 #include "core/css/CSSToLengthConversionData.h"
29 #include "core/css/resolver/CSSToStyleMap.h"
30 #include "core/css/resolver/ElementResolveContext.h"
31 #include "core/css/resolver/ElementStyleResources.h"
32 #include "core/css/resolver/FontBuilder.h"
33 #include "core/dom/Element.h"
34 #include "core/rendering/style/CachedUAStyle.h"
35 #include "core/rendering/style/RenderStyle.h"
36 #include "core/rendering/style/StyleInheritedData.h"
40 class CSSAnimationUpdate;
41 class FontDescription;
44 class StyleResolverState {
46 WTF_MAKE_NONCOPYABLE(StyleResolverState);
48 StyleResolverState(Document&, Element*, RenderStyle* parentStyle = 0);
49 ~StyleResolverState();
51 // In FontFaceSet and CanvasRenderingContext2D, we don't have an element to grab the document from.
52 // This is why we have to store the document separately.
53 Document& document() const { return m_document; }
54 // These are all just pass-through methods to ElementResolveContext.
55 Element* element() const { return m_elementContext.element(); }
56 const ContainerNode* parentNode() const { return m_elementContext.parentNode(); }
57 const RenderStyle* rootElementStyle() const { return m_elementContext.rootElementStyle(); }
58 EInsideLink elementLinkState() const { return m_elementContext.elementLinkState(); }
59 bool distributedToInsertionPoint() const { return m_elementContext.distributedToInsertionPoint(); }
61 const ElementResolveContext& elementContext() const { return m_elementContext; }
63 void setStyle(PassRefPtr<RenderStyle> style) { m_style = style; m_cssToLengthConversionData.setStyle(m_style.get()); }
64 const RenderStyle* style() const { return m_style.get(); }
65 RenderStyle* style() { return m_style.get(); }
66 PassRefPtr<RenderStyle> takeStyle() { return m_style.release(); }
68 const CSSToLengthConversionData& cssToLengthConversionData() const { return m_cssToLengthConversionData; }
70 void setAnimationUpdate(PassOwnPtrWillBeRawPtr<CSSAnimationUpdate>);
71 const CSSAnimationUpdate* animationUpdate() { return m_animationUpdate.get(); }
72 PassOwnPtrWillBeRawPtr<CSSAnimationUpdate> takeAnimationUpdate();
74 void setParentStyle(PassRefPtr<RenderStyle> parentStyle) { m_parentStyle = parentStyle; }
75 const RenderStyle* parentStyle() const { return m_parentStyle.get(); }
76 RenderStyle* parentStyle() { return m_parentStyle.get(); }
78 void setCurrentRule(StyleRule* currentRule) { m_currentRule = currentRule; }
79 const StyleRule* currentRule() const { return m_currentRule; }
81 // FIXME: These are effectively side-channel "out parameters" for the various
82 // map functions. When we map from CSS to style objects we use this state object
83 // to track various meta-data about that mapping (e.g. if it's cache-able).
84 // We need to move this data off of StyleResolverState and closer to the
85 // objects it applies to. Possibly separating (immutable) inputs from (mutable) outputs.
86 void setApplyPropertyToRegularStyle(bool isApply) { m_applyPropertyToRegularStyle = isApply; }
87 void setApplyPropertyToVisitedLinkStyle(bool isApply) { m_applyPropertyToVisitedLinkStyle = isApply; }
88 bool applyPropertyToRegularStyle() const { return m_applyPropertyToRegularStyle; }
89 bool applyPropertyToVisitedLinkStyle() const { return m_applyPropertyToVisitedLinkStyle; }
91 // Holds all attribute names found while applying "content" properties that contain an "attr()" value.
92 Vector<AtomicString>& contentAttrValues() { return m_contentAttrValues; }
94 void setLineHeightValue(CSSValue* value) { m_lineHeightValue = value; }
95 CSSValue* lineHeightValue() { return m_lineHeightValue; }
97 void cacheUserAgentBorderAndBackground()
99 // RenderTheme only needs the cached style if it has an appearance,
100 // and constructing it is expensive so we avoid it if possible.
101 if (!style()->hasAppearance())
103 m_cachedUAStyle = CachedUAStyle(style());
105 const CachedUAStyle& cachedUAStyle() const { return m_cachedUAStyle; }
107 ElementStyleResources& elementStyleResources() { return m_elementStyleResources; }
108 const CSSToStyleMap& styleMap() const { return m_styleMap; }
109 CSSToStyleMap& styleMap() { return m_styleMap; }
111 // FIXME: Once styleImage can be made to not take a StyleResolverState
112 // this convenience function should be removed. As-is, without this, call
113 // sites are extremely verbose.
114 PassRefPtr<StyleImage> styleImage(CSSPropertyID propertyId, CSSValue* value)
116 return m_elementStyleResources.styleImage(document(), document().textLinkColors(), style()->color(), propertyId, value);
119 FontBuilder& fontBuilder() { return m_fontBuilder; }
120 // FIXME: These exist as a primitive way to track mutations to font-related properties
121 // on a RenderStyle. As designed, these are very error-prone, as some callers
122 // set these directly on the RenderStyle w/o telling us. Presumably we'll
123 // want to design a better wrapper around RenderStyle for tracking these mutations
124 // and separate it from StyleResolverState.
125 const FontDescription& parentFontDescription() { return m_parentStyle->fontDescription(); }
126 void setZoom(float f) { m_fontBuilder.didChangeFontParameters(m_style->setZoom(f)); }
127 void setEffectiveZoom(float f) { m_fontBuilder.didChangeFontParameters(m_style->setEffectiveZoom(f)); }
128 void setWritingMode(WritingMode writingMode) { m_fontBuilder.didChangeFontParameters(m_style->setWritingMode(writingMode)); }
129 void setTextOrientation(TextOrientation textOrientation) { m_fontBuilder.didChangeFontParameters(m_style->setTextOrientation(textOrientation)); }
131 // SVG handles zooming in a different way compared to CSS. The whole document is scaled instead
132 // of each individual length value in the render style / tree. CSSPrimitiveValue::computeLength*()
133 // multiplies each resolved length with the zoom multiplier - so for SVG we need to disable that.
134 // Though all CSS values that can be applied to outermost <svg> elements (width/height/border/padding...)
135 // need to respect the scaling. RenderBox (the parent class of RenderSVGRoot) grabs values like
136 // width/height/border/padding/... from the RenderStyle -> for SVG these values would never scale,
137 // if we'd pass a 1.0 zoom factor everyhwere. So we only pass a zoom factor of 1.0 for specific
138 // properties that are NOT allowed to scale within a zoomed SVG document (letter/word-spacing/font-size).
139 bool useSVGZoomRules() const { return element() && element()->isSVGElement(); }
142 ElementResolveContext m_elementContext;
143 Document& m_document;
145 // m_style is the primary output for each element's style resolve.
146 RefPtr<RenderStyle> m_style;
148 CSSToLengthConversionData m_cssToLengthConversionData;
150 // m_parentStyle is not always just element->parentNode()->style()
151 // so we keep it separate from m_elementContext.
152 RefPtr<RenderStyle> m_parentStyle;
154 OwnPtrWillBeMember<CSSAnimationUpdate> m_animationUpdate;
156 bool m_applyPropertyToRegularStyle;
157 bool m_applyPropertyToVisitedLinkStyle;
159 RawPtrWillBeMember<CSSValue> m_lineHeightValue;
161 FontBuilder m_fontBuilder;
163 CachedUAStyle m_cachedUAStyle;
165 ElementStyleResources m_elementStyleResources;
166 // CSSToStyleMap is a pure-logic class and only contains
167 // a back-pointer to this object.
168 CSSToStyleMap m_styleMap;
169 Vector<AtomicString> m_contentAttrValues;
171 RawPtrWillBeMember<StyleRule> m_currentRule;
174 } // namespace WebCore
176 #endif // StyleResolverState_h