зеркало из https://github.com/mozilla/gecko-dev.git
127 строки
5.0 KiB
C++
127 строки
5.0 KiB
C++
/* -*- 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/. */
|
|
|
|
/*
|
|
* temporary (expanded) representation of property-value pairs used to
|
|
* hold data from matched rules during style data computation.
|
|
*/
|
|
|
|
#ifndef nsRuleData_h_
|
|
#define nsRuleData_h_
|
|
|
|
#include "nsCSSProps.h"
|
|
#include "nsStyleStructFwd.h"
|
|
|
|
class nsPresContext;
|
|
class nsStyleContext;
|
|
struct nsRuleData;
|
|
|
|
typedef void (*nsPostResolveFunc)(void* aStyleStruct, nsRuleData* aData);
|
|
|
|
struct nsRuleData
|
|
{
|
|
const uint32_t mSIDs;
|
|
bool mCanStoreInRuleTree;
|
|
bool mIsImportantRule;
|
|
uint8_t mLevel; // an nsStyleSet::sheetType
|
|
nsPresContext* const mPresContext;
|
|
nsStyleContext* const mStyleContext;
|
|
const nsPostResolveFunc mPostResolveCallback;
|
|
|
|
// We store nsCSSValues needed to compute the data for one or more
|
|
// style structs (specified by the bitfield mSIDs). These are stored
|
|
// in a single array allocation (which our caller allocates; see
|
|
// AutoCSSValueArray) The offset of each property |prop| in
|
|
// mValueStorage is the sum of
|
|
// mValueOffsets[nsCSSProps::kSIDTable[prop]] and
|
|
// nsCSSProps::PropertyIndexInStruct(prop). The only place we gather
|
|
// more than one style struct's data at a time is
|
|
// nsRuleNode::HasAuthorSpecifiedRules; therefore some code that we
|
|
// know is not called from HasAuthorSpecifiedRules assumes that the
|
|
// mValueOffsets for the one struct in mSIDs is zero.
|
|
nsCSSValue* const mValueStorage; // our user owns this array
|
|
size_t mValueOffsets[nsStyleStructID_Length];
|
|
|
|
nsRuleData(uint32_t aSIDs, nsCSSValue* aValueStorage,
|
|
nsPresContext* aContext, nsStyleContext* aStyleContext);
|
|
|
|
#ifdef DEBUG
|
|
~nsRuleData();
|
|
#else
|
|
~nsRuleData() {}
|
|
#endif
|
|
|
|
/**
|
|
* Return a pointer to the value object within |this| corresponding
|
|
* to property |aProperty|.
|
|
*
|
|
* This function must only be called if the given property is in
|
|
* mSIDs.
|
|
*/
|
|
nsCSSValue* ValueFor(nsCSSProperty aProperty)
|
|
{
|
|
NS_ABORT_IF_FALSE(aProperty < eCSSProperty_COUNT_no_shorthands,
|
|
"invalid or shorthand property");
|
|
|
|
nsStyleStructID sid = nsCSSProps::kSIDTable[aProperty];
|
|
size_t indexInStruct = nsCSSProps::PropertyIndexInStruct(aProperty);
|
|
|
|
// This should really be nsCachedStyleData::GetBitForSID, but we can't
|
|
// include that here since it includes us.
|
|
NS_ABORT_IF_FALSE(mSIDs & (1 << sid),
|
|
"calling nsRuleData::ValueFor on property not in mSIDs");
|
|
NS_ABORT_IF_FALSE(sid != eStyleStruct_BackendOnly &&
|
|
indexInStruct != size_t(-1),
|
|
"backend-only property");
|
|
|
|
return mValueStorage + mValueOffsets[sid] + indexInStruct;
|
|
}
|
|
|
|
const nsCSSValue* ValueFor(nsCSSProperty aProperty) const {
|
|
return const_cast<nsRuleData*>(this)->ValueFor(aProperty);
|
|
}
|
|
|
|
/**
|
|
* Getters like ValueFor(aProperty), but for each property by name
|
|
* (ValueForBackgroundColor, etc.), and more efficient than ValueFor.
|
|
* These use the names used for the property on DOM interfaces (the
|
|
* 'method' field in nsCSSPropList.h).
|
|
*
|
|
* Like ValueFor(), the caller must check that the property is within
|
|
* mSIDs.
|
|
*/
|
|
#define CSS_PROP_DOMPROP_PREFIXED(prop_) prop_
|
|
#define CSS_PROP(name_, id_, method_, flags_, pref_, parsevariant_, \
|
|
kwtable_, stylestruct_, stylestructoffset_, animtype_) \
|
|
nsCSSValue* ValueFor##method_() { \
|
|
NS_ABORT_IF_FALSE(mSIDs & NS_STYLE_INHERIT_BIT(stylestruct_), \
|
|
"Calling nsRuleData::ValueFor" #method_ " without " \
|
|
"NS_STYLE_INHERIT_BIT(" #stylestruct_ " in mSIDs."); \
|
|
nsStyleStructID sid = eStyleStruct_##stylestruct_; \
|
|
size_t indexInStruct = \
|
|
nsCSSProps::PropertyIndexInStruct(eCSSProperty_##id_); \
|
|
NS_ABORT_IF_FALSE(sid != eStyleStruct_BackendOnly && \
|
|
indexInStruct != size_t(-1), \
|
|
"backend-only property"); \
|
|
return mValueStorage + mValueOffsets[sid] + indexInStruct; \
|
|
} \
|
|
const nsCSSValue* ValueFor##method_() const { \
|
|
return const_cast<nsRuleData*>(this)->ValueFor##method_(); \
|
|
}
|
|
#define CSS_PROP_BACKENDONLY(name_, id_, method_, flags_, pref_, \
|
|
parsevariant_, kwtable_) \
|
|
/* empty; backend-only structs are not in nsRuleData */
|
|
#include "nsCSSPropList.h"
|
|
#undef CSS_PROP
|
|
#undef CSS_PROP_DOMPROP_PREFIXED
|
|
#undef CSS_PROP_BACKENDONLY
|
|
|
|
private:
|
|
inline size_t GetPoisonOffset();
|
|
|
|
};
|
|
|
|
#endif
|