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gecko/layout/style/nsCSSValue.h
Kyle Huey a2581f4219 Bug 816498: Fix some things about background attribute handling that are still broken. r=bz 
As filed the bug is about table backgrounds failing to print.  The root cause of this is that we load images from the original document, because print/print-preview documents (which are static clones of the original) cannot do loads.  This results in an entry in the css::ImageValue's request table under the original document, but entry under the printing document.  Then we do layout, try to get the request, and fail, and nothing is displayed.  The solution to this is to force us to clone the request for the printing document if we're loading off the original document.  I manually verified that this does not regress Bug 560235.

While writing a test for this, we discovered another problem.  The reftest print code does not actually use the printing codepath.  Instead it takes an existing document, tears down its presshell, and creates a new presshell for printing.  Fixing the above bug did not make the reftest print test pass because ImageLoader does not deal properly with presshell destruction/recreation.  It assumes that when the presshell is destroyed all of the css::ImageValues can be cleared of their entries for that document.  This fails for ImageValues for mapped attributes because they are held alive by the content tree.  When a new presshell for this document is then created there is no entry for the document and thus no image request to paint.  The fix for this is to only clear the frame to request and request to frame mapping hashtables and not to clear the document's entry on the ImageValue when the presshell is destroyed.  The destruction of the ImageLoader (which is held from a strong reference on the document) is when those entries are removed.  The final change is to change css::ImageValue's hashtable from holding a strong reference to the keys (which are documents) to holding raw pointer references.  This is safe because we clear the relevant entry when the corresponding ImageLoader dies, and is needed to prevent a reference cycle that was being broken by presshell destruction.

--HG--
rename : layout/reftests/backgrounds/table-background-ref.html => layout/reftests/backgrounds/table-background-print-ref.html
rename : layout/reftests/backgrounds/table-background.html => layout/reftests/backgrounds/table-background-print.html
2013-02-23 06:59:43 -08:00

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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 "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"
#include "mozilla/FloatingPoint.h"
class imgRequestProxy;
class nsIDocument;
class nsIPrincipal;
class nsPresContext;
class nsIURI;
template <class T>
class nsPtrHashKey;
// 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(nsMallocSizeOfFun 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_None = 4, // (n/a) value is none
eCSSUnit_Normal = 5, // (n/a) value is normal (algorithmic, different than auto)
eCSSUnit_System_Font = 6, // (n/a) value is -moz-use-system-font
eCSSUnit_All = 7, // (n/a) value is all
eCSSUnit_Dummy = 8, // (n/a) a fake but specified value, used
// only in temporary values
eCSSUnit_DummyInherit = 9, // (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,
// 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_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_PairList = 55, // (nsCSSValuePairList*) list of value pairs
eCSSUnit_PairListDep = 56, // (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 nsCSSRect;
struct nsCSSRect_heap;
struct nsCSSValueList;
struct nsCSSValueList_heap;
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);
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;
}
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(!MOZ_DOUBLE_IS_NaN(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;
}
// 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 SetPairValue(const nsCSSValuePair* aPair);
void SetPairValue(const nsCSSValue& xValue, const nsCSSValue& yValue);
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 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. Can return null on allocation
// failure.
static already_AddRefed<nsStringBuffer>
BufferFromString(const nsString& aValue);
size_t SizeOfExcludingThis(nsMallocSizeOfFun 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;
nsCSSValuePair_heap* mPair;
nsCSSRect_heap* mRect;
nsCSSValueTriplet_heap* mTriplet;
nsCSSValueList_heap* mList;
nsCSSValueList* mListDependent;
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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun aMallocSizeOf) const;
};
// 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun 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(nsMallocSizeOfFun aMallocSizeOf) const;
private:
nsCSSValueGradient(const nsCSSValueGradient& aOther) MOZ_DELETE;
nsCSSValueGradient& operator=(const nsCSSValueGradient& 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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