The Tor Browser: content/base/src/nsAttrValueInlines.h@6474c204b198 (annotated)

content/base/src/nsAttrValueInlines.h@6474c204b198 (annotated)

content/base/src/nsAttrValueInlines.h

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef nsAttrValueInlines_h__
 #define nsAttrValueInlines_h__
 #include <stdint.h>
 #include "nsAttrValue.h"
 struct MiscContainer
 {
   typedef nsAttrValue::ValueType ValueType;
   ValueType mType;
   // mStringBits points to either nsIAtom* or nsStringBuffer* and is used when
   // mType isn't mCSSStyleRule.
   // Note eStringBase and eAtomBase is used also to handle the type of
   // mStringBits.
   uintptr_t mStringBits;
   union {
     struct {
       union {
         int32_t mInteger;
         nscolor mColor;
         uint32_t mEnumValue;
         int32_t mPercent;
         mozilla::css::StyleRule* mCSSStyleRule;
         mozilla::css::URLValue* mURL;
         mozilla::css::ImageValue* mImage;
         nsAttrValue::AtomArray* mAtomArray;
         nsIntMargin* mIntMargin;
         const nsSVGAngle* mSVGAngle;
         const nsSVGIntegerPair* mSVGIntegerPair;
         const nsSVGLength2* mSVGLength;
         const mozilla::SVGLengthList* mSVGLengthList;
         const mozilla::SVGNumberList* mSVGNumberList;
         const nsSVGNumberPair* mSVGNumberPair;
         const mozilla::SVGPathData* mSVGPathData;
         const mozilla::SVGPointList* mSVGPointList;
         const mozilla::SVGAnimatedPreserveAspectRatio* mSVGPreserveAspectRatio;
         const mozilla::SVGStringList* mSVGStringList;
         const mozilla::SVGTransformList* mSVGTransformList;
         const nsSVGViewBox* mSVGViewBox;
       };
       uint32_t mRefCount : 31;
       uint32_t mCached : 1;
     } mValue;
     double mDoubleValue;
   };
   MiscContainer()
     : mType(nsAttrValue::eColor),
       mStringBits(0)
   {
     MOZ_COUNT_CTOR(MiscContainer);
     mValue.mColor = 0;
     mValue.mRefCount = 0;
     mValue.mCached = 0;
   }
   ~MiscContainer()
   {
     if (IsRefCounted()) {
       MOZ_ASSERT(mValue.mRefCount == 0);
       MOZ_ASSERT(!mValue.mCached);
     }
     MOZ_COUNT_DTOR(MiscContainer);
   }
   bool GetString(nsAString& aString) const;
   inline bool IsRefCounted() const
   {
     // Nothing stops us from refcounting (and sharing) other types of
     // MiscContainer (except eDoubleValue types) but there's no compelling
     // reason to
     return mType == nsAttrValue::eCSSStyleRule;
   }
   inline int32_t AddRef() {
     MOZ_ASSERT(IsRefCounted());
     return ++mValue.mRefCount;
   }
   inline int32_t Release() {
     MOZ_ASSERT(IsRefCounted());
     return --mValue.mRefCount;
   }
   void Cache();
   void Evict();
 };
 /**
  * Implementation of inline methods
  */
 inline int32_t
 nsAttrValue::GetIntegerValue() const
 {
   NS_PRECONDITION(Type() == eInteger, "wrong type");
   return (BaseType() == eIntegerBase)
          ? GetIntInternal()
          : GetMiscContainer()->mValue.mInteger;
 }
 inline int16_t
 nsAttrValue::GetEnumValue() const
 {
   NS_PRECONDITION(Type() == eEnum, "wrong type");
   // We don't need to worry about sign extension here since we're
   // returning an int16_t which will cut away the top bits.
   return static_cast<int16_t>((
     (BaseType() == eIntegerBase)
     ? static_cast<uint32_t>(GetIntInternal())
     : GetMiscContainer()->mValue.mEnumValue)
       >> NS_ATTRVALUE_ENUMTABLEINDEX_BITS);
 }
 inline float
 nsAttrValue::GetPercentValue() const
 {
   NS_PRECONDITION(Type() == ePercent, "wrong type");
   return ((BaseType() == eIntegerBase)
           ? GetIntInternal()
           : GetMiscContainer()->mValue.mPercent)
             / 100.0f;
 }
 inline nsAttrValue::AtomArray*
 nsAttrValue::GetAtomArrayValue() const
 {
   NS_PRECONDITION(Type() == eAtomArray, "wrong type");
   return GetMiscContainer()->mValue.mAtomArray;
 }
 inline mozilla::css::StyleRule*
 nsAttrValue::GetCSSStyleRuleValue() const
 {
   NS_PRECONDITION(Type() == eCSSStyleRule, "wrong type");
   return GetMiscContainer()->mValue.mCSSStyleRule;
 }
 inline mozilla::css::URLValue*
 nsAttrValue::GetURLValue() const
 {
   NS_PRECONDITION(Type() == eURL, "wrong type");
   return GetMiscContainer()->mValue.mURL;
 }
 inline mozilla::css::ImageValue*
 nsAttrValue::GetImageValue() const
 {
   NS_PRECONDITION(Type() == eImage, "wrong type");
   return GetMiscContainer()->mValue.mImage;
 }
 inline double
 nsAttrValue::GetDoubleValue() const
 {
   NS_PRECONDITION(Type() == eDoubleValue, "wrong type");
   return GetMiscContainer()->mDoubleValue;
 }
 inline bool
 nsAttrValue::GetIntMarginValue(nsIntMargin& aMargin) const
 {
   NS_PRECONDITION(Type() == eIntMarginValue, "wrong type");
   nsIntMargin* m = GetMiscContainer()->mValue.mIntMargin;
   if (!m)
     return false;
   aMargin = *m;
   return true;
 }
 inline bool
 nsAttrValue::IsSVGType(ValueType aType) const
 {
   return aType >= eSVGTypesBegin && aType <= eSVGTypesEnd;
 }
 inline void
 nsAttrValue::SetPtrValueAndType(void* aValue, ValueBaseType aType)
 {
   NS_ASSERTION(!(NS_PTR_TO_INT32(aValue) & ~NS_ATTRVALUE_POINTERVALUE_MASK),
                "pointer not properly aligned, this will crash");
   mBits = reinterpret_cast<intptr_t>(aValue) | aType;
 }
 inline void
 nsAttrValue::ResetIfSet()
 {
   if (mBits) {
     Reset();
   }
 }
 inline MiscContainer*
 nsAttrValue::GetMiscContainer() const
 {
   NS_ASSERTION(BaseType() == eOtherBase, "wrong type");
   return static_cast<MiscContainer*>(GetPtr());
 }
 inline int32_t
 nsAttrValue::GetIntInternal() const
 {
   NS_ASSERTION(BaseType() == eIntegerBase,
                "getting integer from non-integer");
   // Make sure we get a signed value.
   // Lets hope the optimizer optimizes this into a shift. Unfortunatly signed
   // bitshift right is implementaion dependant.
   return static_cast<int32_t>(mBits & ~NS_ATTRVALUE_INTEGERTYPE_MASK) /
          NS_ATTRVALUE_INTEGERTYPE_MULTIPLIER;
 }
 #endif

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content/base/src/nsAttrValueInlines.h@6474c204b198 (annotated)

content/base/src/nsAttrValueInlines.h