Wrap CSS length conversion arguments in an object

Source/core/css/CSSPrimitiveValue.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012 Apple Inc. All rights reserved.
  *
  * 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.
  */
 
 #include "config.h"
 #include "core/css/CSSPrimitiveValue.h"
 
 #include "bindings/v8/ExceptionState.h"
 #include "core/css/CSSBasicShapes.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSParser.h"
+#include "core/css/CSSToLengthConversionData.h"
 #include "core/css/Counter.h"
 #include "core/css/Pair.h"
 #include "core/css/RGBColor.h"
 #include "core/css/Rect.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/Node.h"
 #include "core/rendering/style/RenderStyle.h"
 #include "platform/LayoutUnit.h"
 #include "wtf/DecimalNumber.h"
@@ skipping 470 matching lines @@
     case CSS_GRAD:
         return grad2deg(getDoubleValue());
     case CSS_TURN:
         return turn2deg(getDoubleValue());
     default:
         ASSERT_NOT_REACHED();
         return 0;
     }
 }
 
-template<> int CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> int CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return roundForImpreciseConversion<int>(computeLengthDouble(style, rootStyle, multiplier, computingFontSize));
+    return roundForImpreciseConversion<int>(computeLengthDouble(conversionData));
 }
 
-template<> unsigned CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> unsigned CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return roundForImpreciseConversion<unsigned>(computeLengthDouble(style, rootStyle, multiplier, computingFontSize));
+    return roundForImpreciseConversion<unsigned>(computeLengthDouble(conversionData));
 }
 
-template<> Length CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> Length CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return Length(clampTo<float>(computeLengthDouble(style, rootStyle, multiplier, computingFontSize), minValueForCssLength, maxValueForCssLength), Fixed);
+    return Length(clampTo<float>(computeLengthDouble(conversionData), minValueForCssLength, maxValueForCssLength), Fixed);
 }
 
-template<> short CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> short CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return roundForImpreciseConversion<short>(computeLengthDouble(style, rootStyle, multiplier, computingFontSize));
+    return roundForImpreciseConversion<short>(computeLengthDouble(conversionData));
 }
 
-template<> unsigned short CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> unsigned short CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return roundForImpreciseConversion<unsigned short>(computeLengthDouble(style, rootStyle, multiplier, computingFontSize));
+    return roundForImpreciseConversion<unsigned short>(computeLengthDouble(conversionData));
 }
 
-template<> float CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> float CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return static_cast<float>(computeLengthDouble(style, rootStyle, multiplier, computingFontSize));
+    return static_cast<float>(computeLengthDouble(conversionData));
 }
 
-template<> double CSSPrimitiveValue::computeLength(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+template<> double CSSPrimitiveValue::computeLength(const CSSToLengthConversionData& conversionData)
 {
-    return computeLengthDouble(style, rootStyle, multiplier, computingFontSize);
+    return computeLengthDouble(conversionData);
 }
 
-double CSSPrimitiveValue::computeLengthDouble(const RenderStyle* style, const RenderStyle* rootStyle, float multiplier, bool computingFontSize)
+double CSSPrimitiveValue::computeLengthDouble(const CSSToLengthConversionData& conversionData)
 {
     if (m_primitiveUnitType == CSS_CALC)
-        // The multiplier and factor is applied to each value in the calc expression individually
-        return m_value.calc->computeLengthPx(style, rootStyle, multiplier, computingFontSize);
+        return m_value.calc->computeLengthPx(conversionData);
+
+    const RenderStyle& style = conversionData.style();
+    const RenderStyle& rootStyle = conversionData.rootStyle();
+    bool computingFontSize = conversionData.computingFontSize();
 
     double factor;
 
     switch (primitiveType()) {
         case CSS_EMS:
-            factor = computingFontSize ? style->fontDescription().specifiedSize() : style->fontDescription().computedSize();
+            factor = computingFontSize ? style.fontDescription().specifiedSize() : style.fontDescription().computedSize();
             break;
         case CSS_EXS:
             // FIXME: We have a bug right now where the zoom will be applied twice to EX units.
             // We really need to compute EX using fontMetrics for the original specifiedSize and not use
             // our actual constructed rendering font.
-            if (style->fontMetrics().hasXHeight())
-                factor = style->fontMetrics().xHeight();
+            if (style.fontMetrics().hasXHeight())
+                factor = style.fontMetrics().xHeight();
             else
-                factor = (computingFontSize ? style->fontDescription().specifiedSize() : style->fontDescription().computedSize()) / 2.0;
+                factor = (computingFontSize ? style.fontDescription().specifiedSize() : style.fontDescription().computedSize()) / 2.0;
             break;
         case CSS_REMS:
-            if (rootStyle)
-                factor = computingFontSize ? rootStyle->fontDescription().specifiedSize() : rootStyle->fontDescription().computedSize();
-            else
-                factor = 1.0;
+            factor = computingFontSize ? rootStyle.fontDescription().specifiedSize() : rootStyle.fontDescription().computedSize();
             break;
         case CSS_CHS:
-            factor = style->fontMetrics().zeroWidth();
+            factor = style.fontMetrics().zeroWidth();
             break;
         case CSS_PX:
             factor = 1.0;
             break;
         case CSS_CM:
             factor = cssPixelsPerCentimeter;
             break;
         case CSS_MM:
             factor = cssPixelsPerMillimeter;
             break;
@@ skipping 15 matching lines @@
             return -1.0;
     }
 
     // We do not apply the zoom factor when we are computing the value of the font-size property. The zooming
     // for font sizes is much more complicated, since we have to worry about enforcing the minimum font size preference
     // as well as enforcing the implicit "smart minimum."
     double result = getDoubleValue() * factor;
     if (computingFontSize || isFontRelativeLength())
         return result;
 
-    return result * multiplier;
+    return result * conversionData.zoom();
 }
 
 void CSSPrimitiveValue::setFloatValue(unsigned short, double, ExceptionState& exceptionState)
 {
     // Keeping values immutable makes optimizations easier and allows sharing of the primitive value objects.
     // No other engine supports mutating style through this API. Computed style is always read-only anyway.
     // Supporting setter would require making primitive value copy-on-write and taking care of style invalidation.
     exceptionState.throwUninformativeAndGenericDOMException(NoModificationAllowedError);
 }
 
@@ skipping 701 matching lines @@
         return m_value.parserOperator == other.m_value.parserOperator;
     case CSS_CALC:
         return m_value.calc && other.m_value.calc && m_value.calc->equals(*other.m_value.calc);
     case CSS_SHAPE:
         return m_value.shape && other.m_value.shape && m_value.shape->equals(*other.m_value.shape);
     }
     return false;
 }
 
 } // namespace WebCore