debugging for crbug.com/646539

third_party/WebKit/Source/core/style/StyleRareInheritedData.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef StyleRareInheritedData_h
 #define StyleRareInheritedData_h
 
-#include "core/CoreExport.h"
-#include "core/css/StyleColor.h"
-#include "core/style/TextSizeAdjust.h"
-#include "platform/Length.h"
-#include "platform/graphics/Color.h"
-#include "platform/heap/Handle.h"
-#include "platform/text/TabSize.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefVector.h"
-#include "wtf/text/AtomicString.h"
-
 namespace blink {
 
-class AppliedTextDecoration;
-class CursorData;
-class QuotesData;
-class ShadowList;
-class StyleImage;
-class StyleVariableData;
+enum CSSPropertyID {
+    CSSPropertyStopColor = 197,
+    CSSPropertyTextDecorationColor = 214,
+    CSSPropertyWebkitTextFillColor = 298,
+};
 
-typedef RefVector<AppliedTextDecoration> AppliedTextDecorationList;
-typedef HeapVector<CursorData> CursorList;
+typedef unsigned RGBA32; // RGBA quadruplet
 
-// This struct is for rarely used inherited CSS3, CSS2, and WebKit-specific properties.
-// By grouping them together, we save space, and only allocate this object when someone
-// actually uses one of these properties.
-// TODO(sashab): Move this into a private class on ComputedStyle, and remove
-// all methods on it, merging them into copy/creation methods on ComputedStyle
-// instead. Keep the allocation logic, only allocating a new object if needed.
-class CORE_EXPORT StyleRareInheritedData : public RefCounted<StyleRareInheritedData> {
+RGBA32 makeRGB(int r, int g, int b);
+
+inline int alphaChannel(RGBA32 color) { return (color >> 24) & 0xFF; }
+
+class Color {
 public:
-    static PassRefPtr<StyleRareInheritedData> create() { return adoptRef(new StyleRareInheritedData); }
-    PassRefPtr<StyleRareInheritedData> copy() const { return adoptRef(new StyleRareInheritedData(*this)); }
+    Color() : m_color(Color::transparent) { }
+    Color(RGBA32 color) : m_color(color) { }
+    Color(int r, int g, int b) : m_color(makeRGB(r, g, b)) { }
+
+    bool hasAlpha() const { return alpha() < 255; }
+
+    int alpha() const { return alphaChannel(m_color); }
+
+    RGBA32 rgb() const { return m_color; } // Preserve the alpha.
+
+    static const RGBA32 black = 0xFF000000;
+    static const RGBA32 transparent = 0x00000000;
+
+private:
+    RGBA32 m_color;
+};
+
+inline bool operator==(const Color& a, const Color& b)
+{
+    return a.rgb() == b.rgb();
+}
+
+inline bool operator!=(const Color& a, const Color& b)
+{
+    return !(a == b);
+}
+
+
+class StyleColor {
+public:
+    StyleColor() : m_currentColor(true) { }
+    StyleColor(Color color) : m_color(color), m_currentColor(false) { }
+    static StyleColor currentColor() { return StyleColor(); }
+
+    bool isCurrentColor() const { return m_currentColor; }
+    Color getColor() const { /*ASSERT(!isCurrentColor());*/ return m_color; }
+
+    Color resolve(Color currentColor) const { return m_currentColor ? currentColor : m_color; }
+
+private:
+    Color m_color;
+    bool m_currentColor;
+};
+
+inline bool operator==(const StyleColor& a, const StyleColor& b)
+{
+    if (a.isCurrentColor() || b.isCurrentColor())
+        return a.isCurrentColor() && b.isCurrentColor();
+    return a.getColor() == b.getColor();
+}
+
+inline bool operator!=(const StyleColor& a, const StyleColor& b)
+{
+    return !(a == b);
+}
+
+class StyleRareInheritedData {
+public:
     ~StyleRareInheritedData();
 
-    bool operator==(const StyleRareInheritedData&) const;
-    bool operator!=(const StyleRareInheritedData& o) const
+    StyleColor textStrokeColor() const
     {
-        return !(*this == o);
+        return m_textStrokeColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textStrokeColor);
     }
-    bool shadowDataEquivalent(const StyleRareInheritedData&) const;
-    bool quotesDataEquivalent(const StyleRareInheritedData&) const;
+    StyleColor visitedLinkTextFillColor() const
+    {
+        return m_visitedLinkTextFillColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextFillColor);
+    }
 
-    Persistent<StyleImage> listStyleImage;
-
-    StyleColor textStrokeColor() const { return m_textStrokeColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textStrokeColor); }
-    StyleColor textFillColor() const { return m_textFillColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textFillColor); }
-    StyleColor textEmphasisColor() const { return m_textEmphasisColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_textEmphasisColor); }
-    StyleColor visitedLinkTextStrokeColor() const { return m_visitedLinkTextStrokeColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextStrokeColor); }
-    StyleColor visitedLinkTextFillColor() const { return m_visitedLinkTextFillColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextFillColor); }
-    StyleColor visitedLinkTextEmphasisColor() const { return m_visitedLinkTextEmphasisColorIsCurrentColor ? StyleColor::currentColor() : StyleColor(m_visitedLinkTextEmphasisColor); }
-
-    void setTextStrokeColor(const StyleColor& color) { m_textStrokeColor = color.resolve(Color()); m_textStrokeColorIsCurrentColor = color.isCurrentColor(); }
-    void setTextFillColor(const StyleColor& color) { m_textFillColor = color.resolve(Color()); m_textFillColorIsCurrentColor = color.isCurrentColor(); }
-    void setTextEmphasisColor(const StyleColor& color) { m_textEmphasisColor = color.resolve(Color()); m_textEmphasisColorIsCurrentColor = color.isCurrentColor(); }
-    void setVisitedLinkTextStrokeColor(const StyleColor& color) { m_visitedLinkTextStrokeColor = color.resolve(Color()); m_visitedLinkTextStrokeColorIsCurrentColor = color.isCurrentColor(); }
-    void setVisitedLinkTextFillColor(const StyleColor& color) { m_visitedLinkTextFillColor = color.resolve(Color()); m_visitedLinkTextFillColorIsCurrentColor = color.isCurrentColor(); }
-    void setVisitedLinkTextEmphasisColor(const StyleColor& color) { m_visitedLinkTextEmphasisColor = color.resolve(Color()); m_visitedLinkTextEmphasisColorIsCurrentColor = color.isCurrentColor(); }
+    void setVisitedLinkTextFillColor(const StyleColor& color)
+    {
+        m_visitedLinkTextFillColor = color.resolve(Color());
+        m_visitedLinkTextFillColorIsCurrentColor = color.isCurrentColor();
+    }
 
     Color m_textStrokeColor;
-    float textStrokeWidth;
-    Color m_textFillColor;
-    Color m_textEmphasisColor;
-
-    Color m_visitedLinkTextStrokeColor;
     Color m_visitedLinkTextFillColor;
-    Color m_visitedLinkTextEmphasisColor;
-
-    RefPtr<ShadowList> textShadow; // Our text shadow information for shadowed text drawing.
-    AtomicString highlight; // Apple-specific extension for custom highlight rendering.
-
-    Persistent<CursorList> cursorData;
-
-    Length indent;
-    float m_effectiveZoom;
-
-    // Paged media properties.
-    short widows;
-    short orphans;
 
     unsigned m_textStrokeColorIsCurrentColor : 1;
-    unsigned m_textFillColorIsCurrentColor : 1;
-    unsigned m_textEmphasisColorIsCurrentColor : 1;
-    unsigned m_visitedLinkTextStrokeColorIsCurrentColor : 1;
     unsigned m_visitedLinkTextFillColorIsCurrentColor : 1;
-    unsigned m_visitedLinkTextEmphasisColorIsCurrentColor : 1;
 
-    unsigned textSecurity : 2; // ETextSecurity
-    unsigned userModify : 2; // EUserModify (editing)
-    unsigned wordBreak : 2; // EWordBreak
-    unsigned overflowWrap : 1; // EOverflowWrap
-    unsigned lineBreak : 3; // LineBreak
-    unsigned userSelect : 2; // EUserSelect
-    unsigned speak : 3; // ESpeak
-    unsigned hyphens : 2; // Hyphens
-    unsigned textEmphasisFill : 1; // TextEmphasisFill
-    unsigned textEmphasisMark : 3; // TextEmphasisMark
-    unsigned textEmphasisPosition : 1; // TextEmphasisPosition
-    unsigned m_textAlignLast : 3; // TextAlignLast
-    unsigned m_textJustify : 2; // TextJustify
-    unsigned m_textOrientation : 2; // TextOrientation
-    unsigned m_textCombine : 1; // CSS3 text-combine-upright properties
-    unsigned m_textIndentLine : 1; // TextIndentEachLine
-    unsigned m_textIndentType : 1; // TextIndentHanging
-    // CSS Image Values Level 3
-    unsigned m_imageRendering : 3; // EImageRendering
-    unsigned m_textUnderlinePosition : 1; // TextUnderlinePosition
-    unsigned m_rubyPosition : 1; // RubyPosition
+    StyleColor m_textDecorationColor;
+    StyleColor m_visitedLinkTextDecorationColor;
 
-    // Though will-change is not itself an inherited property, the intent
-    // expressed by 'will-change: contents' includes descendants.
-    unsigned m_subtreeWillChangeContents : 1;
+    StyleRareInheritedData();
+};
 
-    unsigned m_selfOrAncestorHasDirAutoAttribute : 1;
-
-    unsigned m_respectImageOrientation : 1;
-
-    unsigned m_snapHeightPosition : 7;
-
-    AtomicString hyphenationString;
-    short hyphenationLimitBefore;
-    short hyphenationLimitAfter;
-    short hyphenationLimitLines;
-
-    uint8_t m_snapHeightUnit;
-
-    AtomicString textEmphasisCustomMark;
-    RefPtr<QuotesData> quotes;
-
-    Color tapHighlightColor;
-
-    RefPtr<AppliedTextDecorationList> appliedTextDecorations;
-    TabSize m_tabSize;
-
-    RefPtr<StyleVariableData> variables;
-    TextSizeAdjust m_textSizeAdjust;
-
-private:
-    StyleRareInheritedData();
-    StyleRareInheritedData(const StyleRareInheritedData&);
-};
 
 } // namespace blink
 
 #endif // StyleRareInheritedData_h