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gecko-dev/layout/style/nsCSSValue.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
/* representation of simple property values within CSS declarations */
#ifndef nsCSSValue_h___
#define nsCSSValue_h___
#include "mozilla/Attributes.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/MemoryReporting.h"
#include "nsIPrincipal.h"
#include "nsIURI.h"
#include "nsCOMPtr.h"
#include "nsCRTGlue.h"
#include "nsCSSKeywords.h"
#include "nsCSSProperty.h"
#include "nsColor.h"
#include "nsCoord.h"
#include "nsRefPtrHashtable.h"
#include "nsString.h"
#include "nsStringBuffer.h"
#include "nsTArray.h"
#include "nsStyleConsts.h"
class imgRequestProxy;
class nsIDocument;
class nsIPrincipal;
class nsPresContext;
class nsIURI;
// Deletes a linked list iteratively to avoid blowing up the stack (bug 456196).
#define NS_CSS_DELETE_LIST_MEMBER(type_, ptr_, member_) \
{ \
type_ *cur = (ptr_)->member_; \
(ptr_)->member_ = nullptr; \
while (cur) { \
type_ *dlm_next = cur->member_; \
cur->member_ = nullptr; \
delete cur; \
cur = dlm_next; \
} \
}
// Clones a linked list iteratively to avoid blowing up the stack.
// If it fails to clone the entire list then 'to_' is deleted and
// we return null.
#define NS_CSS_CLONE_LIST_MEMBER(type_, from_, member_, to_, args_) \
{ \
type_ *dest = (to_); \
(to_)->member_ = nullptr; \
for (const type_ *src = (from_)->member_; src; src = src->member_) { \
type_ *clm_clone = src->Clone args_; \
if (!clm_clone) { \
delete (to_); \
return nullptr; \
} \
dest->member_ = clm_clone; \
dest = clm_clone; \
} \
}
namespace mozilla {
namespace css {
struct URLValue {
// Methods are not inline because using an nsIPrincipal means requiring
// caps, which leads to REQUIRES hell, since this header is included all
// over.
// For both constructors aString must not be null.
// For both constructors aOriginPrincipal must not be null.
// Construct with a base URI; this will create the actual URI lazily from
// aString and aBaseURI.
URLValue(nsStringBuffer* aString, nsIURI* aBaseURI, nsIURI* aReferrer,
nsIPrincipal* aOriginPrincipal);
// Construct with the actual URI.
URLValue(nsIURI* aURI, nsStringBuffer* aString, nsIURI* aReferrer,
nsIPrincipal* aOriginPrincipal);
~URLValue();
bool operator==(const URLValue& aOther) const;
// URIEquals only compares URIs and principals (unlike operator==, which
// also compares the original strings). URIEquals also assumes that the
// mURI member of both URL objects is non-null. Do NOT call this method
// unless you're sure this is the case.
bool URIEquals(const URLValue& aOther) const;
nsIURI* GetURI() const;
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
private:
// If mURIResolved is false, mURI stores the base URI.
// If mURIResolved is true, mURI stores the URI we resolve to; this may be
// null if the URI is invalid.
mutable nsCOMPtr<nsIURI> mURI;
public:
nsStringBuffer* mString; // Could use nsRefPtr, but it'd add useless
// null-checks; this is never null.
nsCOMPtr<nsIURI> mReferrer;
nsCOMPtr<nsIPrincipal> mOriginPrincipal;
NS_INLINE_DECL_REFCOUNTING(URLValue)
private:
mutable bool mURIResolved;
URLValue(const URLValue& aOther) MOZ_DELETE;
URLValue& operator=(const URLValue& aOther) MOZ_DELETE;
};
struct ImageValue : public URLValue {
// Not making the constructor and destructor inline because that would
// force us to include imgIRequest.h, which leads to REQUIRES hell, since
// this header is included all over.
// aString must not be null.
ImageValue(nsIURI* aURI, nsStringBuffer* aString, nsIURI* aReferrer,
nsIPrincipal* aOriginPrincipal, nsIDocument* aDocument);
~ImageValue();
// Inherit operator== from URLValue
nsRefPtrHashtable<nsPtrHashKey<nsISupports>, imgRequestProxy> mRequests;
// Override AddRef and Release to not only log ourselves correctly, but
// also so that we delete correctly without a virtual destructor
NS_INLINE_DECL_REFCOUNTING(ImageValue)
};
}
}
enum nsCSSUnit {
eCSSUnit_Null = 0, // (n/a) null unit, value is not specified
eCSSUnit_Auto = 1, // (n/a) value is algorithmic
eCSSUnit_Inherit = 2, // (n/a) value is inherited
eCSSUnit_Initial = 3, // (n/a) value is default UA value
eCSSUnit_Unset = 4, // (n/a) value equivalent to 'initial' if on a reset property, 'inherit' otherwise
eCSSUnit_None = 5, // (n/a) value is none
eCSSUnit_Normal = 6, // (n/a) value is normal (algorithmic, different than auto)
eCSSUnit_System_Font = 7, // (n/a) value is -moz-use-system-font
eCSSUnit_All = 8, // (n/a) value is all
eCSSUnit_Dummy = 9, // (n/a) a fake but specified value, used
// only in temporary values
eCSSUnit_DummyInherit = 10, // (n/a) a fake but specified value, used
// only in temporary values
eCSSUnit_String = 11, // (PRUnichar*) a string value
eCSSUnit_Ident = 12, // (PRUnichar*) a string value
eCSSUnit_Families = 13, // (PRUnichar*) a string value
eCSSUnit_Attr = 14, // (PRUnichar*) a attr(string) value
eCSSUnit_Local_Font = 15, // (PRUnichar*) a local font name
eCSSUnit_Font_Format = 16, // (PRUnichar*) a font format name
eCSSUnit_Element = 17, // (PRUnichar*) an element id
eCSSUnit_Array = 20, // (nsCSSValue::Array*) a list of values
eCSSUnit_Counter = 21, // (nsCSSValue::Array*) a counter(string,[string]) value
eCSSUnit_Counters = 22, // (nsCSSValue::Array*) a counters(string,string[,string]) value
eCSSUnit_Cubic_Bezier = 23, // (nsCSSValue::Array*) a list of float values
eCSSUnit_Steps = 24, // (nsCSSValue::Array*) a list of (integer, enumerated)
eCSSUnit_Function = 25, // (nsCSSValue::Array*) a function with
// parameters. First elem of array is name,
// an nsCSSKeyword as eCSSUnit_Enumerated,
// the rest of the values are arguments.
// The top level of a calc() expression is eCSSUnit_Calc. All
// remaining eCSSUnit_Calc_* units only occur inside these toplevel
// calc values.
// eCSSUnit_Calc has an array with exactly 1 element. eCSSUnit_Calc
// exists so we can distinguish calc(2em) from 2em as specified values
// (but we drop this distinction for nsStyleCoord when we store
// computed values).
eCSSUnit_Calc = 30, // (nsCSSValue::Array*) calc() value
// Plus, Minus, Times_* and Divided have arrays with exactly 2
// elements. a + b + c + d is grouped as ((a + b) + c) + d
eCSSUnit_Calc_Plus = 31, // (nsCSSValue::Array*) + node within calc()
eCSSUnit_Calc_Minus = 32, // (nsCSSValue::Array*) - within calc
eCSSUnit_Calc_Times_L = 33, // (nsCSSValue::Array*) num * val within calc
eCSSUnit_Calc_Times_R = 34, // (nsCSSValue::Array*) val * num within calc
eCSSUnit_Calc_Divided = 35, // (nsCSSValue::Array*) / within calc
eCSSUnit_URL = 40, // (nsCSSValue::URL*) value
eCSSUnit_Image = 41, // (nsCSSValue::Image*) value
eCSSUnit_Gradient = 42, // (nsCSSValueGradient*) value
eCSSUnit_TokenStream = 43, // (nsCSSValueTokenStream*) value
eCSSUnit_Pair = 50, // (nsCSSValuePair*) pair of values
eCSSUnit_Triplet = 51, // (nsCSSValueTriplet*) triplet of values
eCSSUnit_Rect = 52, // (nsCSSRect*) rectangle (four values)
eCSSUnit_List = 53, // (nsCSSValueList*) list of values
eCSSUnit_ListDep = 54, // (nsCSSValueList*) same as List
// but does not own the list
eCSSUnit_SharedList = 55, // (nsCSSValueSharedList*) same as list
// but reference counted and shared
eCSSUnit_PairList = 56, // (nsCSSValuePairList*) list of value pairs
eCSSUnit_PairListDep = 57, // (nsCSSValuePairList*) same as PairList
// but does not own the list
eCSSUnit_Integer = 70, // (int) simple value
eCSSUnit_Enumerated = 71, // (int) value has enumerated meaning
eCSSUnit_EnumColor = 80, // (int) enumerated color (kColorKTable)
eCSSUnit_Color = 81, // (nscolor) an RGBA value
eCSSUnit_Percent = 90, // (float) 1.0 == 100%) value is percentage of something
eCSSUnit_Number = 91, // (float) value is numeric (usually multiplier, different behavior that percent)
// Physical length units
eCSSUnit_PhysicalMillimeter = 200, // (float) 1/25.4 inch
// Length units - relative
// Viewport relative measure
eCSSUnit_ViewportWidth = 700, // (float) 1% of the width of the initial containing block
eCSSUnit_ViewportHeight = 701, // (float) 1% of the height of the initial containing block
eCSSUnit_ViewportMin = 702, // (float) smaller of ViewportWidth and ViewportHeight
eCSSUnit_ViewportMax = 703, // (float) larger of ViewportWidth and ViewportHeight
// Font relative measure
eCSSUnit_EM = 800, // (float) == current font size
eCSSUnit_XHeight = 801, // (float) distance from top of lower case x to baseline
eCSSUnit_Char = 802, // (float) number of characters, used for width with monospace font
eCSSUnit_RootEM = 803, // (float) == root element font size
// Screen relative measure
eCSSUnit_Point = 900, // (float) 4/3 of a CSS pixel
eCSSUnit_Inch = 901, // (float) 96 CSS pixels
eCSSUnit_Millimeter = 902, // (float) 96/25.4 CSS pixels
eCSSUnit_Centimeter = 903, // (float) 96/2.54 CSS pixels
eCSSUnit_Pica = 904, // (float) 12 points == 16 CSS pixls
eCSSUnit_Pixel = 905, // (float) CSS pixel unit
// Angular units
eCSSUnit_Degree = 1000, // (float) 360 per circle
eCSSUnit_Grad = 1001, // (float) 400 per circle
eCSSUnit_Radian = 1002, // (float) 2*pi per circle
eCSSUnit_Turn = 1003, // (float) 1 per circle
// Frequency units
eCSSUnit_Hertz = 2000, // (float) 1/seconds
eCSSUnit_Kilohertz = 2001, // (float) 1000 Hertz
// Time units
eCSSUnit_Seconds = 3000, // (float) Standard time
eCSSUnit_Milliseconds = 3001 // (float) 1/1000 second
};
struct nsCSSValueGradient;
struct nsCSSValuePair;
struct nsCSSValuePair_heap;
struct nsCSSValueTokenStream;
struct nsCSSRect;
struct nsCSSRect_heap;
struct nsCSSValueList;
struct nsCSSValueList_heap;
struct nsCSSValueSharedList;
struct nsCSSValuePairList;
struct nsCSSValuePairList_heap;
struct nsCSSValueTriplet;
struct nsCSSValueTriplet_heap;
class nsCSSValue {
public:
struct Array;
friend struct Array;
friend struct mozilla::css::URLValue;
friend struct mozilla::css::ImageValue;
// for valueless units only (null, auto, inherit, none, all, normal)
explicit nsCSSValue(nsCSSUnit aUnit = eCSSUnit_Null)
: mUnit(aUnit)
{
NS_ABORT_IF_FALSE(aUnit <= eCSSUnit_DummyInherit, "not a valueless unit");
}
nsCSSValue(int32_t aValue, nsCSSUnit aUnit);
nsCSSValue(float aValue, nsCSSUnit aUnit);
nsCSSValue(const nsString& aValue, nsCSSUnit aUnit);
nsCSSValue(Array* aArray, nsCSSUnit aUnit);
explicit nsCSSValue(mozilla::css::URLValue* aValue);
explicit nsCSSValue(mozilla::css::ImageValue* aValue);
explicit nsCSSValue(nsCSSValueGradient* aValue);
explicit nsCSSValue(nsCSSValueTokenStream* aValue);
nsCSSValue(const nsCSSValue& aCopy);
~nsCSSValue() { Reset(); }
nsCSSValue& operator=(const nsCSSValue& aCopy);
bool operator==(const nsCSSValue& aOther) const;
bool operator!=(const nsCSSValue& aOther) const
{
return !(*this == aOther);
}
/**
* Serialize |this| as a specified value for |aProperty| and append
* it to |aResult|.
*/
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
nsCSSUnit GetUnit() const { return mUnit; }
bool IsLengthUnit() const
{ return eCSSUnit_PhysicalMillimeter <= mUnit && mUnit <= eCSSUnit_Pixel; }
/**
* A "fixed" length unit is one that means a specific physical length
* which we try to match based on the physical characteristics of an
* output device.
*/
bool IsFixedLengthUnit() const
{ return mUnit == eCSSUnit_PhysicalMillimeter; }
/**
* What the spec calls relative length units is, for us, split
* between relative length units and pixel length units.
*
* A "relative" length unit is a multiple of some derived metric,
* such as a font em-size, which itself was controlled by an input CSS
* length. Relative length units should not be scaled by zooming, since
* the underlying CSS length would already have been scaled.
*/
bool IsRelativeLengthUnit() const
{ return eCSSUnit_EM <= mUnit && mUnit <= eCSSUnit_RootEM; }
/**
* A "pixel" length unit is a some multiple of CSS pixels.
*/
bool IsPixelLengthUnit() const
{ return eCSSUnit_Point <= mUnit && mUnit <= eCSSUnit_Pixel; }
bool IsAngularUnit() const
{ return eCSSUnit_Degree <= mUnit && mUnit <= eCSSUnit_Turn; }
bool IsFrequencyUnit() const
{ return eCSSUnit_Hertz <= mUnit && mUnit <= eCSSUnit_Kilohertz; }
bool IsTimeUnit() const
{ return eCSSUnit_Seconds <= mUnit && mUnit <= eCSSUnit_Milliseconds; }
bool IsCalcUnit() const
{ return eCSSUnit_Calc <= mUnit && mUnit <= eCSSUnit_Calc_Divided; }
bool UnitHasStringValue() const
{ return eCSSUnit_String <= mUnit && mUnit <= eCSSUnit_Element; }
bool UnitHasArrayValue() const
{ return eCSSUnit_Array <= mUnit && mUnit <= eCSSUnit_Calc_Divided; }
int32_t GetIntValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Integer ||
mUnit == eCSSUnit_Enumerated ||
mUnit == eCSSUnit_EnumColor,
"not an int value");
return mValue.mInt;
}
nsCSSKeyword GetKeywordValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Enumerated, "not a keyword value");
return static_cast<nsCSSKeyword>(mValue.mInt);
}
float GetPercentValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Percent, "not a percent value");
return mValue.mFloat;
}
float GetFloatValue() const
{
NS_ABORT_IF_FALSE(eCSSUnit_Number <= mUnit, "not a float value");
MOZ_ASSERT(!mozilla::IsNaN(mValue.mFloat));
return mValue.mFloat;
}
float GetAngleValue() const
{
NS_ABORT_IF_FALSE(eCSSUnit_Degree <= mUnit &&
mUnit <= eCSSUnit_Turn, "not an angle value");
return mValue.mFloat;
}
// Converts any angle to radians.
double GetAngleValueInRadians() const;
nsAString& GetStringValue(nsAString& aBuffer) const
{
NS_ABORT_IF_FALSE(UnitHasStringValue(), "not a string value");
aBuffer.Truncate();
uint32_t len = NS_strlen(GetBufferValue(mValue.mString));
mValue.mString->ToString(len, aBuffer);
return aBuffer;
}
const PRUnichar* GetStringBufferValue() const
{
NS_ABORT_IF_FALSE(UnitHasStringValue(), "not a string value");
return GetBufferValue(mValue.mString);
}
nscolor GetColorValue() const
{
NS_ABORT_IF_FALSE((mUnit == eCSSUnit_Color), "not a color value");
return mValue.mColor;
}
bool IsNonTransparentColor() const;
Array* GetArrayValue() const
{
NS_ABORT_IF_FALSE(UnitHasArrayValue(), "not an array value");
return mValue.mArray;
}
nsIURI* GetURLValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_URL || mUnit == eCSSUnit_Image,
"not a URL value");
return mUnit == eCSSUnit_URL ?
mValue.mURL->GetURI() : mValue.mImage->GetURI();
}
nsCSSValueGradient* GetGradientValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Gradient, "not a gradient value");
return mValue.mGradient;
}
nsCSSValueTokenStream* GetTokenStreamValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_TokenStream, "not a token stream value");
return mValue.mTokenStream;
}
nsCSSValueSharedList* GetSharedListValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_SharedList, "not a shared list value");
return mValue.mSharedList;
}
// bodies of these are below
inline nsCSSValuePair& GetPairValue();
inline const nsCSSValuePair& GetPairValue() const;
inline nsCSSRect& GetRectValue();
inline const nsCSSRect& GetRectValue() const;
inline nsCSSValueList* GetListValue();
inline const nsCSSValueList* GetListValue() const;
inline nsCSSValuePairList* GetPairListValue();
inline const nsCSSValuePairList* GetPairListValue() const;
inline nsCSSValueTriplet& GetTripletValue();
inline const nsCSSValueTriplet& GetTripletValue() const;
mozilla::css::URLValue* GetURLStructValue() const
{
// Not allowing this for Image values, because if the caller takes
// a ref to them they won't be able to delete them properly.
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_URL, "not a URL value");
return mValue.mURL;
}
mozilla::css::ImageValue* GetImageStructValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Image, "not an Image value");
return mValue.mImage;
}
const PRUnichar* GetOriginalURLValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_URL || mUnit == eCSSUnit_Image,
"not a URL value");
return GetBufferValue(mUnit == eCSSUnit_URL ?
mValue.mURL->mString :
mValue.mImage->mString);
}
// Not making this inline because that would force us to include
// imgIRequest.h, which leads to REQUIRES hell, since this header is included
// all over.
imgRequestProxy* GetImageValue(nsIDocument* aDocument) const;
nscoord GetFixedLength(nsPresContext* aPresContext) const;
nscoord GetPixelLength() const;
void Reset() // sets to null
{
if (mUnit != eCSSUnit_Null)
DoReset();
}
private:
void DoReset();
public:
void SetIntValue(int32_t aValue, nsCSSUnit aUnit);
void SetPercentValue(float aValue);
void SetFloatValue(float aValue, nsCSSUnit aUnit);
void SetStringValue(const nsString& aValue, nsCSSUnit aUnit);
void SetColorValue(nscolor aValue);
void SetArrayValue(nsCSSValue::Array* aArray, nsCSSUnit aUnit);
void SetURLValue(mozilla::css::URLValue* aURI);
void SetImageValue(mozilla::css::ImageValue* aImage);
void SetGradientValue(nsCSSValueGradient* aGradient);
void SetTokenStreamValue(nsCSSValueTokenStream* aTokenStream);
void SetPairValue(const nsCSSValuePair* aPair);
void SetPairValue(const nsCSSValue& xValue, const nsCSSValue& yValue);
void SetSharedListValue(nsCSSValueSharedList* aList);
void SetDependentListValue(nsCSSValueList* aList);
void SetDependentPairListValue(nsCSSValuePairList* aList);
void SetTripletValue(const nsCSSValueTriplet* aTriplet);
void SetTripletValue(const nsCSSValue& xValue, const nsCSSValue& yValue, const nsCSSValue& zValue);
void SetAutoValue();
void SetInheritValue();
void SetInitialValue();
void SetUnsetValue();
void SetNoneValue();
void SetAllValue();
void SetNormalValue();
void SetSystemFontValue();
void SetDummyValue();
void SetDummyInheritValue();
// These are a little different - they allocate storage for you and
// return a handle.
nsCSSRect& SetRectValue();
nsCSSValueList* SetListValue();
nsCSSValuePairList* SetPairListValue();
void StartImageLoad(nsIDocument* aDocument) const; // Only pretend const
// Initializes as a function value with the specified function id.
Array* InitFunction(nsCSSKeyword aFunctionId, uint32_t aNumArgs);
// Checks if this is a function value with the specified function id.
bool EqualsFunction(nsCSSKeyword aFunctionId) const;
// Returns an already addrefed buffer. Guaranteed to return non-null.
// (Will abort on allocation failure.)
static already_AddRefed<nsStringBuffer>
BufferFromString(const nsString& aValue);
size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
private:
static const PRUnichar* GetBufferValue(nsStringBuffer* aBuffer) {
return static_cast<PRUnichar*>(aBuffer->Data());
}
protected:
nsCSSUnit mUnit;
union {
int32_t mInt;
float mFloat;
// Note: the capacity of the buffer may exceed the length of the string.
// If we're of a string type, mString is not null.
nsStringBuffer* mString;
nscolor mColor;
Array* mArray;
mozilla::css::URLValue* mURL;
mozilla::css::ImageValue* mImage;
nsCSSValueGradient* mGradient;
nsCSSValueTokenStream* mTokenStream;
nsCSSValuePair_heap* mPair;
nsCSSRect_heap* mRect;
nsCSSValueTriplet_heap* mTriplet;
nsCSSValueList_heap* mList;
nsCSSValueList* mListDependent;
nsCSSValueSharedList* mSharedList;
nsCSSValuePairList_heap* mPairList;
nsCSSValuePairList* mPairListDependent;
} mValue;
};
struct nsCSSValue::Array {
// return |Array| with reference count of zero
static Array* Create(size_t aItemCount) {
return new (aItemCount) Array(aItemCount);
}
nsCSSValue& operator[](size_t aIndex) {
NS_ABORT_IF_FALSE(aIndex < mCount, "out of range");
return mArray[aIndex];
}
const nsCSSValue& operator[](size_t aIndex) const {
NS_ABORT_IF_FALSE(aIndex < mCount, "out of range");
return mArray[aIndex];
}
nsCSSValue& Item(size_t aIndex) { return (*this)[aIndex]; }
const nsCSSValue& Item(size_t aIndex) const { return (*this)[aIndex]; }
size_t Count() const { return mCount; }
bool operator==(const Array& aOther) const
{
if (mCount != aOther.mCount)
return false;
for (size_t i = 0; i < mCount; ++i)
if ((*this)[i] != aOther[i])
return false;
return true;
}
// XXXdholbert This uses a size_t ref count. Should we use a variant
// of NS_INLINE_DECL_REFCOUNTING that takes a type as an argument?
void AddRef() {
if (mRefCnt == size_t(-1)) { // really want SIZE_MAX
NS_WARNING("refcount overflow, leaking nsCSSValue::Array");
return;
}
++mRefCnt;
NS_LOG_ADDREF(this, mRefCnt, "nsCSSValue::Array", sizeof(*this));
}
void Release() {
if (mRefCnt == size_t(-1)) { // really want SIZE_MAX
NS_WARNING("refcount overflow, leaking nsCSSValue::Array");
return;
}
--mRefCnt;
NS_LOG_RELEASE(this, mRefCnt, "nsCSSValue::Array");
if (mRefCnt == 0)
delete this;
}
private:
size_t mRefCnt;
const size_t mCount;
// This must be the last sub-object, since we extend this array to
// be of size mCount; it needs to be a sub-object so it gets proper
// alignment.
nsCSSValue mArray[1];
void* operator new(size_t aSelfSize, size_t aItemCount) CPP_THROW_NEW {
NS_ABORT_IF_FALSE(aItemCount > 0, "cannot have a 0 item count");
return ::operator new(aSelfSize + sizeof(nsCSSValue) * (aItemCount - 1));
}
void operator delete(void* aPtr) { ::operator delete(aPtr); }
nsCSSValue* First() { return mArray; }
const nsCSSValue* First() const { return mArray; }
#define CSSVALUE_LIST_FOR_EXTRA_VALUES(var) \
for (nsCSSValue *var = First() + 1, *var##_end = First() + mCount; \
var != var##_end; ++var)
Array(size_t aItemCount)
: mRefCnt(0)
, mCount(aItemCount)
{
MOZ_COUNT_CTOR(nsCSSValue::Array);
CSSVALUE_LIST_FOR_EXTRA_VALUES(val) {
new (val) nsCSSValue();
}
}
~Array()
{
MOZ_COUNT_DTOR(nsCSSValue::Array);
CSSVALUE_LIST_FOR_EXTRA_VALUES(val) {
val->~nsCSSValue();
}
}
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
#undef CSSVALUE_LIST_FOR_EXTRA_VALUES
private:
Array(const Array& aOther) MOZ_DELETE;
Array& operator=(const Array& aOther) MOZ_DELETE;
};
// Prefer nsCSSValue::Array for lists of fixed size.
struct nsCSSValueList {
nsCSSValueList() : mNext(nullptr) { MOZ_COUNT_CTOR(nsCSSValueList); }
~nsCSSValueList();
nsCSSValueList* Clone() const; // makes a deep copy
void CloneInto(nsCSSValueList* aList) const; // makes a deep copy into aList
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
bool operator==(nsCSSValueList const& aOther) const;
bool operator!=(const nsCSSValueList& aOther) const
{ return !(*this == aOther); }
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
nsCSSValue mValue;
nsCSSValueList* mNext;
private:
nsCSSValueList(const nsCSSValueList& aCopy) // makes a shallow copy
: mValue(aCopy.mValue), mNext(nullptr)
{
MOZ_COUNT_CTOR(nsCSSValueList);
}
};
// nsCSSValueList_heap differs from nsCSSValueList only in being
// refcounted. It should not be necessary to use this class directly;
// it's an implementation detail of nsCSSValue.
struct nsCSSValueList_heap : public nsCSSValueList {
NS_INLINE_DECL_REFCOUNTING(nsCSSValueList_heap)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
};
// This is a reference counted list value. Note that the object is
// a wrapper for the reference count and a pointer to the head of the
// list, whereas the other list types (such as nsCSSValueList) do
// not have such a wrapper.
struct nsCSSValueSharedList {
nsCSSValueSharedList()
: mHead(nullptr)
{
MOZ_COUNT_CTOR(nsCSSValueSharedList);
}
// Takes ownership of aList.
nsCSSValueSharedList(nsCSSValueList* aList)
: mHead(aList)
{
MOZ_COUNT_CTOR(nsCSSValueSharedList);
}
~nsCSSValueSharedList();
NS_INLINE_DECL_REFCOUNTING(nsCSSValueSharedList)
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
bool operator==(nsCSSValueSharedList const& aOther) const;
bool operator!=(const nsCSSValueSharedList& aOther) const
{ return !(*this == aOther); }
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
nsCSSValueList* mHead;
};
// This has to be here so that the relationship between nsCSSValueList
// and nsCSSValueList_heap is visible.
inline nsCSSValueList*
nsCSSValue::GetListValue()
{
if (mUnit == eCSSUnit_List)
return mValue.mList;
else {
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_ListDep, "not a pairlist value");
return mValue.mListDependent;
}
}
inline const nsCSSValueList*
nsCSSValue::GetListValue() const
{
if (mUnit == eCSSUnit_List)
return mValue.mList;
else {
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_ListDep, "not a pairlist value");
return mValue.mListDependent;
}
}
struct nsCSSRect {
nsCSSRect(void);
nsCSSRect(const nsCSSRect& aCopy);
~nsCSSRect();
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
bool operator==(const nsCSSRect& aOther) const {
return mTop == aOther.mTop &&
mRight == aOther.mRight &&
mBottom == aOther.mBottom &&
mLeft == aOther.mLeft;
}
bool operator!=(const nsCSSRect& aOther) const {
return mTop != aOther.mTop ||
mRight != aOther.mRight ||
mBottom != aOther.mBottom ||
mLeft != aOther.mLeft;
}
void SetAllSidesTo(const nsCSSValue& aValue);
bool AllSidesEqualTo(const nsCSSValue& aValue) const {
return mTop == aValue &&
mRight == aValue &&
mBottom == aValue &&
mLeft == aValue;
}
void Reset() {
mTop.Reset();
mRight.Reset();
mBottom.Reset();
mLeft.Reset();
}
bool HasValue() const {
return
mTop.GetUnit() != eCSSUnit_Null ||
mRight.GetUnit() != eCSSUnit_Null ||
mBottom.GetUnit() != eCSSUnit_Null ||
mLeft.GetUnit() != eCSSUnit_Null;
}
nsCSSValue mTop;
nsCSSValue mRight;
nsCSSValue mBottom;
nsCSSValue mLeft;
typedef nsCSSValue nsCSSRect::*side_type;
static const side_type sides[4];
};
// nsCSSRect_heap differs from nsCSSRect only in being
// refcounted. It should not be necessary to use this class directly;
// it's an implementation detail of nsCSSValue.
struct nsCSSRect_heap : public nsCSSRect {
NS_INLINE_DECL_REFCOUNTING(nsCSSRect_heap)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
};
// This has to be here so that the relationship between nsCSSRect
// and nsCSSRect_heap is visible.
inline nsCSSRect&
nsCSSValue::GetRectValue()
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Rect, "not a rect value");
return *mValue.mRect;
}
inline const nsCSSRect&
nsCSSValue::GetRectValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Rect, "not a rect value");
return *mValue.mRect;
}
struct nsCSSValuePair {
nsCSSValuePair()
{
MOZ_COUNT_CTOR(nsCSSValuePair);
}
nsCSSValuePair(nsCSSUnit aUnit)
: mXValue(aUnit), mYValue(aUnit)
{
MOZ_COUNT_CTOR(nsCSSValuePair);
}
nsCSSValuePair(const nsCSSValue& aXValue, const nsCSSValue& aYValue)
: mXValue(aXValue), mYValue(aYValue)
{
MOZ_COUNT_CTOR(nsCSSValuePair);
}
nsCSSValuePair(const nsCSSValuePair& aCopy)
: mXValue(aCopy.mXValue), mYValue(aCopy.mYValue)
{
MOZ_COUNT_CTOR(nsCSSValuePair);
}
~nsCSSValuePair()
{
MOZ_COUNT_DTOR(nsCSSValuePair);
}
bool operator==(const nsCSSValuePair& aOther) const {
return mXValue == aOther.mXValue &&
mYValue == aOther.mYValue;
}
bool operator!=(const nsCSSValuePair& aOther) const {
return mXValue != aOther.mXValue ||
mYValue != aOther.mYValue;
}
bool BothValuesEqualTo(const nsCSSValue& aValue) const {
return mXValue == aValue &&
mYValue == aValue;
}
void SetBothValuesTo(const nsCSSValue& aValue) {
mXValue = aValue;
mYValue = aValue;
}
void Reset() {
mXValue.Reset();
mYValue.Reset();
}
bool HasValue() const {
return mXValue.GetUnit() != eCSSUnit_Null ||
mYValue.GetUnit() != eCSSUnit_Null;
}
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
nsCSSValue mXValue;
nsCSSValue mYValue;
};
// nsCSSValuePair_heap differs from nsCSSValuePair only in being
// refcounted. It should not be necessary to use this class directly;
// it's an implementation detail of nsCSSValue.
struct nsCSSValuePair_heap : public nsCSSValuePair {
// forward constructor
nsCSSValuePair_heap(const nsCSSValue& aXValue, const nsCSSValue& aYValue)
: nsCSSValuePair(aXValue, aYValue)
{}
NS_INLINE_DECL_REFCOUNTING(nsCSSValuePair_heap)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
};
struct nsCSSValueTriplet {
nsCSSValueTriplet()
{
MOZ_COUNT_CTOR(nsCSSValueTriplet);
}
nsCSSValueTriplet(nsCSSUnit aUnit)
: mXValue(aUnit), mYValue(aUnit), mZValue(aUnit)
{
MOZ_COUNT_CTOR(nsCSSValueTriplet);
}
nsCSSValueTriplet(const nsCSSValue& aXValue,
const nsCSSValue& aYValue,
const nsCSSValue& aZValue)
: mXValue(aXValue), mYValue(aYValue), mZValue(aZValue)
{
MOZ_COUNT_CTOR(nsCSSValueTriplet);
}
nsCSSValueTriplet(const nsCSSValueTriplet& aCopy)
: mXValue(aCopy.mXValue), mYValue(aCopy.mYValue), mZValue(aCopy.mZValue)
{
MOZ_COUNT_CTOR(nsCSSValueTriplet);
}
~nsCSSValueTriplet()
{
MOZ_COUNT_DTOR(nsCSSValueTriplet);
}
bool operator==(const nsCSSValueTriplet& aOther) const {
return mXValue == aOther.mXValue &&
mYValue == aOther.mYValue &&
mZValue == aOther.mZValue;
}
bool operator!=(const nsCSSValueTriplet& aOther) const {
return mXValue != aOther.mXValue ||
mYValue != aOther.mYValue ||
mZValue != aOther.mZValue;
}
bool AllValuesEqualTo(const nsCSSValue& aValue) const {
return mXValue == aValue &&
mYValue == aValue &&
mZValue == aValue;
}
void SetAllValuesTo(const nsCSSValue& aValue) {
mXValue = aValue;
mYValue = aValue;
mZValue = aValue;
}
void Reset() {
mXValue.Reset();
mYValue.Reset();
mZValue.Reset();
}
bool HasValue() const {
return mXValue.GetUnit() != eCSSUnit_Null ||
mYValue.GetUnit() != eCSSUnit_Null ||
mZValue.GetUnit() != eCSSUnit_Null;
}
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
nsCSSValue mXValue;
nsCSSValue mYValue;
nsCSSValue mZValue;
};
// nsCSSValueTriplet_heap differs from nsCSSValueTriplet only in being
// refcounted. It should not be necessary to use this class directly;
// it's an implementation detail of nsCSSValue.
struct nsCSSValueTriplet_heap : public nsCSSValueTriplet {
// forward constructor
nsCSSValueTriplet_heap(const nsCSSValue& aXValue, const nsCSSValue& aYValue, const nsCSSValue& aZValue)
: nsCSSValueTriplet(aXValue, aYValue, aZValue)
{}
NS_INLINE_DECL_REFCOUNTING(nsCSSValueTriplet_heap)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
};
// This has to be here so that the relationship between nsCSSValuePair
// and nsCSSValuePair_heap is visible.
inline nsCSSValuePair&
nsCSSValue::GetPairValue()
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Pair, "not a pair value");
return *mValue.mPair;
}
inline const nsCSSValuePair&
nsCSSValue::GetPairValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Pair, "not a pair value");
return *mValue.mPair;
}
inline nsCSSValueTriplet&
nsCSSValue::GetTripletValue()
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Triplet, "not a triplet value");
return *mValue.mTriplet;
}
inline const nsCSSValueTriplet&
nsCSSValue::GetTripletValue() const
{
NS_ABORT_IF_FALSE(mUnit == eCSSUnit_Triplet, "not a triplet value");
return *mValue.mTriplet;
}
// Maybe should be replaced with nsCSSValueList and nsCSSValue::Array?
struct nsCSSValuePairList {
nsCSSValuePairList() : mNext(nullptr) { MOZ_COUNT_CTOR(nsCSSValuePairList); }
~nsCSSValuePairList();
nsCSSValuePairList* Clone() const; // makes a deep copy
void AppendToString(nsCSSProperty aProperty, nsAString& aResult) const;
bool operator==(const nsCSSValuePairList& aOther) const;
bool operator!=(const nsCSSValuePairList& aOther) const
{ return !(*this == aOther); }
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
nsCSSValue mXValue;
nsCSSValue mYValue;
nsCSSValuePairList* mNext;
private:
nsCSSValuePairList(const nsCSSValuePairList& aCopy) // makes a shallow copy
: mXValue(aCopy.mXValue), mYValue(aCopy.mYValue), mNext(nullptr)
{
MOZ_COUNT_CTOR(nsCSSValuePairList);
}
};
// nsCSSValuePairList_heap differs from nsCSSValuePairList only in being
// refcounted. It should not be necessary to use this class directly;
// it's an implementation detail of nsCSSValue.
struct nsCSSValuePairList_heap : public nsCSSValuePairList {
NS_INLINE_DECL_REFCOUNTING(nsCSSValuePairList_heap)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
};
// This has to be here so that the relationship between nsCSSValuePairList
// and nsCSSValuePairList_heap is visible.
inline nsCSSValuePairList*
nsCSSValue::GetPairListValue()
{
if (mUnit == eCSSUnit_PairList)
return mValue.mPairList;
else {
NS_ABORT_IF_FALSE (mUnit == eCSSUnit_PairListDep, "not a pairlist value");
return mValue.mPairListDependent;
}
}
inline const nsCSSValuePairList*
nsCSSValue::GetPairListValue() const
{
if (mUnit == eCSSUnit_PairList)
return mValue.mPairList;
else {
NS_ABORT_IF_FALSE (mUnit == eCSSUnit_PairListDep, "not a pairlist value");
return mValue.mPairListDependent;
}
}
struct nsCSSValueGradientStop {
public:
nsCSSValueGradientStop();
// needed to keep bloat logs happy when we use the TArray
// in nsCSSValueGradient
nsCSSValueGradientStop(const nsCSSValueGradientStop& aOther);
~nsCSSValueGradientStop();
nsCSSValue mLocation;
nsCSSValue mColor;
bool operator==(const nsCSSValueGradientStop& aOther) const
{
return (mLocation == aOther.mLocation &&
mColor == aOther.mColor);
}
bool operator!=(const nsCSSValueGradientStop& aOther) const
{
return !(*this == aOther);
}
size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
};
struct nsCSSValueGradient {
nsCSSValueGradient(bool aIsRadial, bool aIsRepeating);
// true if gradient is radial, false if it is linear
bool mIsRadial;
bool mIsRepeating;
bool mIsLegacySyntax;
bool mIsExplicitSize;
// line position and angle
nsCSSValuePair mBgPos;
nsCSSValue mAngle;
// Only meaningful if mIsRadial is true
private:
nsCSSValue mRadialValues[2];
public:
nsCSSValue& GetRadialShape() { return mRadialValues[0]; }
const nsCSSValue& GetRadialShape() const { return mRadialValues[0]; }
nsCSSValue& GetRadialSize() { return mRadialValues[1]; }
const nsCSSValue& GetRadialSize() const { return mRadialValues[1]; }
nsCSSValue& GetRadiusX() { return mRadialValues[0]; }
const nsCSSValue& GetRadiusX() const { return mRadialValues[0]; }
nsCSSValue& GetRadiusY() { return mRadialValues[1]; }
const nsCSSValue& GetRadiusY() const { return mRadialValues[1]; }
InfallibleTArray<nsCSSValueGradientStop> mStops;
bool operator==(const nsCSSValueGradient& aOther) const
{
if (mIsRadial != aOther.mIsRadial ||
mIsRepeating != aOther.mIsRepeating ||
mIsLegacySyntax != aOther.mIsLegacySyntax ||
mIsExplicitSize != aOther.mIsExplicitSize ||
mBgPos != aOther.mBgPos ||
mAngle != aOther.mAngle ||
mRadialValues[0] != aOther.mRadialValues[0] ||
mRadialValues[1] != aOther.mRadialValues[1])
return false;
if (mStops.Length() != aOther.mStops.Length())
return false;
for (uint32_t i = 0; i < mStops.Length(); i++) {
if (mStops[i] != aOther.mStops[i])
return false;
}
return true;
}
bool operator!=(const nsCSSValueGradient& aOther) const
{
return !(*this == aOther);
}
NS_INLINE_DECL_REFCOUNTING(nsCSSValueGradient)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
private:
nsCSSValueGradient(const nsCSSValueGradient& aOther) MOZ_DELETE;
nsCSSValueGradient& operator=(const nsCSSValueGradient& aOther) MOZ_DELETE;
};
struct nsCSSValueTokenStream {
nsCSSValueTokenStream();
~nsCSSValueTokenStream();
bool operator==(const nsCSSValueTokenStream& aOther) const
{
bool eq;
return mPropertyID == aOther.mPropertyID &&
mShorthandPropertyID == aOther.mShorthandPropertyID &&
mTokenStream.Equals(aOther.mTokenStream) &&
(mBaseURI == aOther.mBaseURI ||
(mBaseURI && aOther.mBaseURI &&
NS_SUCCEEDED(mBaseURI->Equals(aOther.mBaseURI, &eq)) &&
eq)) &&
(mSheetURI == aOther.mSheetURI ||
(mSheetURI && aOther.mSheetURI &&
NS_SUCCEEDED(mSheetURI->Equals(aOther.mSheetURI, &eq)) &&
eq)) &&
(mSheetPrincipal == aOther.mSheetPrincipal ||
(mSheetPrincipal && aOther.mSheetPrincipal &&
NS_SUCCEEDED(mSheetPrincipal->Equals(aOther.mSheetPrincipal,
&eq)) &&
eq));
}
bool operator!=(const nsCSSValueTokenStream& aOther) const
{
return !(*this == aOther);
}
NS_INLINE_DECL_REFCOUNTING(nsCSSValueTokenStream)
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
// The property that has mTokenStream as its unparsed specified value.
// When a variable reference is used in a shorthand property, a
// TokenStream value is stored as the specified value for each of its
// component longhand properties.
nsCSSProperty mPropertyID;
// The shorthand property that had a value with a variable reference,
// which caused the longhand property identified by mPropertyID to have
// a TokenStream value.
nsCSSProperty mShorthandPropertyID;
// The unparsed CSS corresponding to the specified value of the property.
// When the value of a shorthand property has a variable reference, the
// same mTokenStream value is used on each of the nsCSSValueTokenStream
// objects that will be set by parsing the shorthand.
nsString mTokenStream;
nsCOMPtr<nsIURI> mBaseURI;
nsCOMPtr<nsIURI> mSheetURI;
nsCOMPtr<nsIPrincipal> mSheetPrincipal;
private:
nsCSSValueTokenStream(const nsCSSValueTokenStream& aOther) MOZ_DELETE;
nsCSSValueTokenStream& operator=(const nsCSSValueTokenStream& aOther) MOZ_DELETE;
};
struct nsCSSCornerSizes {
nsCSSCornerSizes(void);
nsCSSCornerSizes(const nsCSSCornerSizes& aCopy);
~nsCSSCornerSizes();
// argument is a "full corner" constant from nsStyleConsts.h
nsCSSValue const & GetCorner(uint32_t aCorner) const {
return this->*corners[aCorner];
}
nsCSSValue & GetCorner(uint32_t aCorner) {
return this->*corners[aCorner];
}
bool operator==(const nsCSSCornerSizes& aOther) const {
NS_FOR_CSS_FULL_CORNERS(corner) {
if (this->GetCorner(corner) != aOther.GetCorner(corner))
return false;
}
return true;
}
bool operator!=(const nsCSSCornerSizes& aOther) const {
NS_FOR_CSS_FULL_CORNERS(corner) {
if (this->GetCorner(corner) != aOther.GetCorner(corner))
return true;
}
return false;
}
bool HasValue() const {
NS_FOR_CSS_FULL_CORNERS(corner) {
if (this->GetCorner(corner).GetUnit() != eCSSUnit_Null)
return true;
}
return false;
}
void Reset();
nsCSSValue mTopLeft;
nsCSSValue mTopRight;
nsCSSValue mBottomRight;
nsCSSValue mBottomLeft;
protected:
typedef nsCSSValue nsCSSCornerSizes::*corner_type;
static const corner_type corners[4];
};
#endif /* nsCSSValue_h___ */
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