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 {
45 WTF_MAKE_NONCOPYABLE(StyleResolverState);
47 StyleResolverState(Document&, Element*, RenderStyle* parentStyle = 0);
48 ~StyleResolverState();
50 // In FontFaceSet and CanvasRenderingContext2D, we don't have an element to grab the document from.
51 // This is why we have to store the document separately.
52 Document& document() const { return m_document; }
53 // These are all just pass-through methods to ElementResolveContext.
54 Element* element() const { return m_elementContext.element(); }
55 const ContainerNode* parentNode() const { return m_elementContext.parentNode(); }
56 const RenderStyle* rootElementStyle() const { return m_elementContext.rootElementStyle(); }
57 EInsideLink elementLinkState() const { return m_elementContext.elementLinkState(); }
58 bool distributedToInsertionPoint() const { return m_elementContext.distributedToInsertionPoint(); }
60 const ElementResolveContext& elementContext() const { return m_elementContext; }
62 void setStyle(PassRefPtr<RenderStyle> style) { m_style = style; m_cssToLengthConversionData.setStyle(m_style.get()); }
63 const RenderStyle* style() const { return m_style.get(); }
64 RenderStyle* style() { return m_style.get(); }
65 PassRefPtr<RenderStyle> takeStyle() { return m_style.release(); }
67 const CSSToLengthConversionData& cssToLengthConversionData() const { return m_cssToLengthConversionData; }
69 void setAnimationUpdate(PassOwnPtr<CSSAnimationUpdate>);
70 const CSSAnimationUpdate* animationUpdate() { return m_animationUpdate.get(); }
71 PassOwnPtr<CSSAnimationUpdate> takeAnimationUpdate();
73 void setParentStyle(PassRefPtr<RenderStyle> parentStyle) { m_parentStyle = parentStyle; }
74 const RenderStyle* parentStyle() const { return m_parentStyle.get(); }
75 RenderStyle* parentStyle() { return m_parentStyle.get(); }
77 void setCurrentRule(StyleRule* currentRule) { m_currentRule = currentRule; }
78 const StyleRule* currentRule() const { return m_currentRule; }
80 // FIXME: These are effectively side-channel "out parameters" for the various
81 // map functions. When we map from CSS to style objects we use this state object
82 // to track various meta-data about that mapping (e.g. if it's cache-able).
83 // We need to move this data off of StyleResolverState and closer to the
84 // objects it applies to. Possibly separating (immutable) inputs from (mutable) outputs.
85 void setApplyPropertyToRegularStyle(bool isApply) { m_applyPropertyToRegularStyle = isApply; }
86 void setApplyPropertyToVisitedLinkStyle(bool isApply) { m_applyPropertyToVisitedLinkStyle = isApply; }
87 bool applyPropertyToRegularStyle() const { return m_applyPropertyToRegularStyle; }
88 bool applyPropertyToVisitedLinkStyle() const { return m_applyPropertyToVisitedLinkStyle; }
90 // Holds all attribute names found while applying "content" properties that contain an "attr()" value.
91 Vector<AtomicString>& contentAttrValues() { return m_contentAttrValues; }
93 void setLineHeightValue(CSSValue* value) { m_lineHeightValue = value; }
94 CSSValue* lineHeightValue() { return m_lineHeightValue; }
96 void cacheUserAgentBorderAndBackground() { m_cachedUAStyle = CachedUAStyle(style()); }
97 const CachedUAStyle& cachedUAStyle() const { return m_cachedUAStyle; }
99 ElementStyleResources& elementStyleResources() { return m_elementStyleResources; }
100 const CSSToStyleMap& styleMap() const { return m_styleMap; }
101 CSSToStyleMap& styleMap() { return m_styleMap; }
103 // FIXME: Once styleImage can be made to not take a StyleResolverState
104 // this convenience function should be removed. As-is, without this, call
105 // sites are extremely verbose.
106 PassRefPtr<StyleImage> styleImage(CSSPropertyID propertyId, CSSValue* value)
108 return m_elementStyleResources.styleImage(document().textLinkColors(), style()->color(), propertyId, value);
111 FontBuilder& fontBuilder() { return m_fontBuilder; }
112 // FIXME: These exist as a primitive way to track mutations to font-related properties
113 // on a RenderStyle. As designed, these are very error-prone, as some callers
114 // set these directly on the RenderStyle w/o telling us. Presumably we'll
115 // want to design a better wrapper around RenderStyle for tracking these mutations
116 // and separate it from StyleResolverState.
117 const FontDescription& parentFontDescription() { return m_parentStyle->fontDescription(); }
118 void setZoom(float f) { m_fontBuilder.didChangeFontParameters(m_style->setZoom(f)); }
119 void setEffectiveZoom(float f) { m_fontBuilder.didChangeFontParameters(m_style->setEffectiveZoom(f)); }
120 void setWritingMode(WritingMode writingMode) { m_fontBuilder.didChangeFontParameters(m_style->setWritingMode(writingMode)); }
121 void setTextOrientation(TextOrientation textOrientation) { m_fontBuilder.didChangeFontParameters(m_style->setTextOrientation(textOrientation)); }
123 // SVG handles zooming in a different way compared to CSS. The whole document is scaled instead
124 // of each individual length value in the render style / tree. CSSPrimitiveValue::computeLength*()
125 // multiplies each resolved length with the zoom multiplier - so for SVG we need to disable that.
126 // Though all CSS values that can be applied to outermost <svg> elements (width/height/border/padding...)
127 // need to respect the scaling. RenderBox (the parent class of RenderSVGRoot) grabs values like
128 // width/height/border/padding/... from the RenderStyle -> for SVG these values would never scale,
129 // if we'd pass a 1.0 zoom factor everyhwere. So we only pass a zoom factor of 1.0 for specific
130 // properties that are NOT allowed to scale within a zoomed SVG document (letter/word-spacing/font-size).
131 bool useSVGZoomRules() const { return element() && element()->isSVGElement(); }
134 friend class StyleResolveScope;
136 ElementResolveContext m_elementContext;
137 Document& m_document;
139 // m_style is the primary output for each element's style resolve.
140 RefPtr<RenderStyle> m_style;
142 CSSToLengthConversionData m_cssToLengthConversionData;
144 // m_parentStyle is not always just element->parentNode()->style()
145 // so we keep it separate from m_elementContext.
146 RefPtr<RenderStyle> m_parentStyle;
148 OwnPtr<CSSAnimationUpdate> m_animationUpdate;
150 bool m_applyPropertyToRegularStyle;
151 bool m_applyPropertyToVisitedLinkStyle;
153 CSSValue* m_lineHeightValue;
155 FontBuilder m_fontBuilder;
157 CachedUAStyle m_cachedUAStyle;
159 ElementStyleResources m_elementStyleResources;
160 // CSSToStyleMap is a pure-logic class and only contains
161 // a back-pointer to this object.
162 CSSToStyleMap m_styleMap;
163 Vector<AtomicString> m_contentAttrValues;
165 StyleRule* m_currentRule;
168 } // namespace WebCore
170 #endif // StyleResolverState_h