зеркало из https://github.com/mozilla/gecko-dev.git
581 строка
22 KiB
C++
581 строка
22 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/. */
|
|
|
|
/* the interface (to internal code) for retrieving computed style data */
|
|
|
|
#include "nsStyleContext.h"
|
|
#include "mozilla/DebugOnly.h"
|
|
#include "mozilla/Maybe.h"
|
|
|
|
#include "nsCSSAnonBoxes.h"
|
|
#include "nsCSSPseudoElements.h"
|
|
#include "nsFontMetrics.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsStyleStruct.h"
|
|
#include "nsStyleStructInlines.h"
|
|
#include "nsString.h"
|
|
#include "nsPresContext.h"
|
|
#include "nsIStyleRule.h"
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsStyleSet.h"
|
|
#include "nsIPresShell.h"
|
|
|
|
#include "nsRuleNode.h"
|
|
#include "GeckoProfiler.h"
|
|
#include "nsIDocument.h"
|
|
#include "nsPrintfCString.h"
|
|
#include "RubyUtils.h"
|
|
#include "mozilla/Preferences.h"
|
|
#include "mozilla/ArenaObjectID.h"
|
|
#include "mozilla/StyleSetHandle.h"
|
|
#include "mozilla/StyleSetHandleInlines.h"
|
|
#include "mozilla/GeckoStyleContext.h"
|
|
#include "mozilla/ServoStyleContext.h"
|
|
#include "nsStyleContextInlines.h"
|
|
|
|
#include "mozilla/ReflowInput.h"
|
|
#include "nsLayoutUtils.h"
|
|
#include "nsCoord.h"
|
|
|
|
// Ensure the binding function declarations in nsStyleContext.h matches
|
|
// those in ServoBindings.h.
|
|
#include "mozilla/ServoBindings.h"
|
|
|
|
using namespace mozilla;
|
|
|
|
//----------------------------------------------------------------------
|
|
|
|
#ifdef DEBUG
|
|
|
|
// Check that the style struct IDs are in the same order as they are
|
|
// in nsStyleStructList.h, since when we set up the IDs, we include
|
|
// the inherited and reset structs spearately from nsStyleStructList.h
|
|
enum DebugStyleStruct {
|
|
#define STYLE_STRUCT(name, checkdata_cb) eDebugStyleStruct_##name,
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
};
|
|
|
|
#define STYLE_STRUCT(name, checkdata_cb) \
|
|
static_assert(static_cast<int>(eDebugStyleStruct_##name) == \
|
|
static_cast<int>(eStyleStruct_##name), \
|
|
"Style struct IDs are not declared in order?");
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
|
|
const uint32_t nsStyleContext::sDependencyTable[] = {
|
|
#define STYLE_STRUCT(name, checkdata_cb)
|
|
#define STYLE_STRUCT_DEP(dep) NS_STYLE_INHERIT_BIT(dep) |
|
|
#define STYLE_STRUCT_END() 0,
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
#undef STYLE_STRUCT_DEP
|
|
#undef STYLE_STRUCT_END
|
|
};
|
|
|
|
#endif
|
|
|
|
nsStyleContext::nsStyleContext(nsAtom* aPseudoTag,
|
|
CSSPseudoElementType aPseudoType)
|
|
: mPseudoTag(aPseudoTag)
|
|
, mBits(((uint64_t)aPseudoType) << NS_STYLE_CONTEXT_TYPE_SHIFT)
|
|
{
|
|
// This check has to be done "backward", because if it were written the
|
|
// more natural way it wouldn't fail even when it needed to.
|
|
static_assert((UINT64_MAX >> NS_STYLE_CONTEXT_TYPE_SHIFT) >=
|
|
static_cast<CSSPseudoElementTypeBase>(
|
|
CSSPseudoElementType::MAX),
|
|
"pseudo element bits no longer fit in a uint64_t");
|
|
|
|
#define eStyleStruct_LastItem (nsStyleStructID_Length - 1)
|
|
static_assert(NS_STYLE_INHERIT_MASK & NS_STYLE_INHERIT_BIT(LastItem),
|
|
"NS_STYLE_INHERIT_MASK must be bigger, and other bits shifted");
|
|
#undef eStyleStruct_LastItem
|
|
|
|
#ifdef DEBUG
|
|
static_assert(MOZ_ARRAY_LENGTH(nsStyleContext::sDependencyTable)
|
|
== nsStyleStructID_Length,
|
|
"Number of items in dependency table doesn't match IDs");
|
|
#endif
|
|
}
|
|
|
|
nsChangeHint
|
|
nsStyleContext::CalcStyleDifference(nsStyleContext* aNewContext,
|
|
uint32_t* aEqualStructs,
|
|
uint32_t* aSamePointerStructs,
|
|
bool aIgnoreVariables)
|
|
{
|
|
AUTO_PROFILER_LABEL("nsStyleContext::CalcStyleDifference", CSS);
|
|
|
|
static_assert(nsStyleStructID_Length <= 32,
|
|
"aEqualStructs is not big enough");
|
|
|
|
MOZ_ASSERT(!aIgnoreVariables || IsServo(),
|
|
"aIgnoreVariables must be false for Gecko contexts");
|
|
|
|
*aEqualStructs = 0;
|
|
*aSamePointerStructs = 0;
|
|
|
|
nsChangeHint hint = nsChangeHint(0);
|
|
NS_ENSURE_TRUE(aNewContext, hint);
|
|
// We must always ensure that we populate the structs on the new style
|
|
// context that are filled in on the old context, so that if we get
|
|
// two style changes in succession, the second of which causes a real
|
|
// style change, the PeekStyleData doesn't return null (implying that
|
|
// nobody ever looked at that struct's data). In other words, we
|
|
// can't skip later structs if we get a big change up front, because
|
|
// we could later get a small change in one of those structs that we
|
|
// don't want to miss.
|
|
|
|
DebugOnly<uint32_t> structsFound = 0;
|
|
|
|
if (IsGecko()) {
|
|
// CalcStyleDifference is always called on the main thread for Gecko
|
|
// style contexts. This assertion helps the heap write static analysis.
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
// FIXME(heycam): We should just do the comparison in
|
|
// nsStyleVariables::CalcDifference, returning NeutralChange if there are
|
|
// any Variables differences.
|
|
const nsStyleVariables* thisVariables = PeekStyleVariables();
|
|
if (thisVariables) {
|
|
structsFound |= NS_STYLE_INHERIT_BIT(Variables);
|
|
const nsStyleVariables* otherVariables = aNewContext->StyleVariables();
|
|
if (thisVariables == otherVariables) {
|
|
*aSamePointerStructs |= NS_STYLE_INHERIT_BIT(Variables);
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(Variables);
|
|
} else if (thisVariables->mVariables == otherVariables->mVariables) {
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(Variables);
|
|
}
|
|
} else {
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(Variables);
|
|
}
|
|
} else {
|
|
if (aIgnoreVariables ||
|
|
Servo_ComputedValues_EqualCustomProperties(
|
|
AsServo()->ComputedData(),
|
|
aNewContext->ComputedData())) {
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(Variables);
|
|
}
|
|
}
|
|
|
|
DebugOnly<int> styleStructCount = 1; // count Variables already
|
|
|
|
// Servo's optimization to stop the cascade when there are no style changes
|
|
// that children need to be recascade for relies on comparing all of the
|
|
// structs, not just those that are returned from PeekStyleData, although
|
|
// if PeekStyleData does return null we could avoid to accumulate any change
|
|
// hints for those structs.
|
|
//
|
|
// FIXME(emilio): Reintroduce that optimization either for all kind of structs
|
|
// after bug 1368290 with a weak parent pointer from text, or just for reset
|
|
// structs.
|
|
//
|
|
// For Gecko structs, we just defer to PeekStyleXXX. But for Servo structs,
|
|
// we need to use the aRelevantStructs bitfield passed in to determine
|
|
// whether to return a struct or not, since this->mBits might not yet
|
|
// be correct (due to not calling ResolveSameStructsAs on it yet).
|
|
#define PEEK(struct_) \
|
|
(IsGecko() \
|
|
? PeekStyle##struct_() \
|
|
: AsServo()->ComputedData()->GetStyle##struct_()) \
|
|
|
|
#define EXPAND(...) __VA_ARGS__
|
|
#define DO_STRUCT_DIFFERENCE_WITH_ARGS(struct_, extra_args_) \
|
|
PR_BEGIN_MACRO \
|
|
const nsStyle##struct_* this##struct_ = PEEK(struct_); \
|
|
if (this##struct_) { \
|
|
structsFound |= NS_STYLE_INHERIT_BIT(struct_); \
|
|
\
|
|
const nsStyle##struct_* other##struct_ = \
|
|
aNewContext->ThreadsafeStyle##struct_(); \
|
|
if (this##struct_ == other##struct_) { \
|
|
/* The very same struct, so we know that there will be no */ \
|
|
/* differences. */ \
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(struct_); \
|
|
} else { \
|
|
nsChangeHint difference = \
|
|
this##struct_->CalcDifference(*other##struct_ EXPAND extra_args_); \
|
|
hint |= difference; \
|
|
if (!difference) { \
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(struct_); \
|
|
} \
|
|
} \
|
|
} else { \
|
|
*aEqualStructs |= NS_STYLE_INHERIT_BIT(struct_); \
|
|
} \
|
|
styleStructCount++; \
|
|
PR_END_MACRO
|
|
#define DO_STRUCT_DIFFERENCE(struct_) \
|
|
DO_STRUCT_DIFFERENCE_WITH_ARGS(struct_, ())
|
|
|
|
// FIXME: The order of these DO_STRUCT_DIFFERENCE calls is no longer
|
|
// significant. With a small amount of effort, we could replace them with a
|
|
// #include "nsStyleStructList.h".
|
|
DO_STRUCT_DIFFERENCE(Display);
|
|
DO_STRUCT_DIFFERENCE(XUL);
|
|
DO_STRUCT_DIFFERENCE(Column);
|
|
DO_STRUCT_DIFFERENCE(Content);
|
|
DO_STRUCT_DIFFERENCE(UserInterface);
|
|
DO_STRUCT_DIFFERENCE(Visibility);
|
|
DO_STRUCT_DIFFERENCE(Outline);
|
|
DO_STRUCT_DIFFERENCE(TableBorder);
|
|
DO_STRUCT_DIFFERENCE(Table);
|
|
DO_STRUCT_DIFFERENCE(UIReset);
|
|
DO_STRUCT_DIFFERENCE(Text);
|
|
DO_STRUCT_DIFFERENCE_WITH_ARGS(List, (, PEEK(Display)));
|
|
DO_STRUCT_DIFFERENCE(SVGReset);
|
|
DO_STRUCT_DIFFERENCE(SVG);
|
|
DO_STRUCT_DIFFERENCE_WITH_ARGS(Position, (, PEEK(Visibility)));
|
|
DO_STRUCT_DIFFERENCE(Font);
|
|
DO_STRUCT_DIFFERENCE(Margin);
|
|
DO_STRUCT_DIFFERENCE(Padding);
|
|
DO_STRUCT_DIFFERENCE(Border);
|
|
DO_STRUCT_DIFFERENCE(TextReset);
|
|
DO_STRUCT_DIFFERENCE(Effects);
|
|
DO_STRUCT_DIFFERENCE(Background);
|
|
DO_STRUCT_DIFFERENCE(Color);
|
|
|
|
#undef DO_STRUCT_DIFFERENCE
|
|
#undef DO_STRUCT_DIFFERENCE_WITH_ARGS
|
|
#undef EXPAND
|
|
|
|
MOZ_ASSERT(styleStructCount == nsStyleStructID_Length,
|
|
"missing a call to DO_STRUCT_DIFFERENCE");
|
|
|
|
#ifdef DEBUG
|
|
#define STYLE_STRUCT_LIST_IGNORE_VARIABLES
|
|
#define STYLE_STRUCT(name_, callback_) \
|
|
MOZ_ASSERT(!!(structsFound & NS_STYLE_INHERIT_BIT(name_)) == \
|
|
(PEEK(name_) != nullptr), \
|
|
"PeekStyleData results must not change in the middle of " \
|
|
"difference calculation.");
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
#undef STYLE_STRUCT_LIST_IGNORE_VARIABLES
|
|
#endif
|
|
|
|
// We check for struct pointer equality here rather than as part of the
|
|
// DO_STRUCT_DIFFERENCE calls, since those calls can result in structs
|
|
// we previously examined and found to be null on this style context
|
|
// getting computed by later DO_STRUCT_DIFFERENCE calls (which can
|
|
// happen when the nsRuleNode::ComputeXXXData method looks up another
|
|
// struct.) This is important for callers in RestyleManager that
|
|
// need to know the equality or not of the final set of cached struct
|
|
// pointers.
|
|
*aSamePointerStructs = 0;
|
|
|
|
#define STYLE_STRUCT_LIST_IGNORE_VARIABLES
|
|
#define STYLE_STRUCT(name_, callback_) \
|
|
{ \
|
|
const nsStyle##name_* data = PEEK(name_); \
|
|
if (!data || data == aNewContext->ThreadsafeStyle##name_()) { \
|
|
*aSamePointerStructs |= NS_STYLE_INHERIT_BIT(name_); \
|
|
} \
|
|
}
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT_LIST_IGNORE_VARIABLES
|
|
#undef STYLE_STRUCT
|
|
|
|
// Note that we do not check whether this->RelevantLinkVisited() !=
|
|
// aNewContext->RelevantLinkVisited(); we don't need to since
|
|
// nsCSSFrameConstructor::DoContentStateChanged always adds
|
|
// nsChangeHint_RepaintFrame for NS_EVENT_STATE_VISITED changes (and
|
|
// needs to, since HasStateDependentStyle probably doesn't work right
|
|
// for NS_EVENT_STATE_VISITED). Hopefully this doesn't actually
|
|
// expose whether links are visited to performance tests since all
|
|
// link coloring happens asynchronously at a time when it's hard for
|
|
// the page to measure.
|
|
// However, we do need to compute the larger of the changes that can
|
|
// happen depending on whether the link is visited or unvisited, since
|
|
// doing only the one that's currently appropriate would expose which
|
|
// links are in history to easy performance measurement. Therefore,
|
|
// here, we add nsChangeHint_RepaintFrame hints (the maximum for
|
|
// things that can depend on :visited) for the properties on which we
|
|
// call GetVisitedDependentColor.
|
|
nsStyleContext* thisVis = GetStyleIfVisited();
|
|
nsStyleContext* otherVis = aNewContext->GetStyleIfVisited();
|
|
if (!thisVis != !otherVis) {
|
|
// One style context has a style-if-visited and the other doesn't.
|
|
// Presume a difference.
|
|
hint |= nsChangeHint_RepaintFrame;
|
|
} else if (thisVis && !NS_IsHintSubset(nsChangeHint_RepaintFrame, hint)) {
|
|
// Both style contexts have a style-if-visited.
|
|
bool change = false;
|
|
|
|
// NB: Calling Peek on |this|, not |thisVis|, since callers may look
|
|
// at a struct on |this| without looking at the same struct on
|
|
// |thisVis| (including this function if we skip one of these checks
|
|
// due to change being true already or due to the old style context
|
|
// not having a style-if-visited), but not the other way around.
|
|
#define STYLE_FIELD(name_) thisVisStruct->name_ != otherVisStruct->name_
|
|
#define STYLE_STRUCT(name_, fields_) \
|
|
if (!change && (PEEK(name_) != nullptr)) { \
|
|
const nsStyle##name_* thisVisStruct = \
|
|
thisVis->ThreadsafeStyle##name_(); \
|
|
const nsStyle##name_* otherVisStruct = \
|
|
otherVis->ThreadsafeStyle##name_(); \
|
|
if (MOZ_FOR_EACH_SEPARATED(STYLE_FIELD, (||), (), fields_)) { \
|
|
change = true; \
|
|
} \
|
|
}
|
|
#include "nsCSSVisitedDependentPropList.h"
|
|
#undef STYLE_STRUCT
|
|
#undef STYLE_FIELD
|
|
|
|
if (change) {
|
|
hint |= nsChangeHint_RepaintFrame;
|
|
}
|
|
}
|
|
|
|
if (hint & nsChangeHint_UpdateContainingBlock) {
|
|
// If a struct returned nsChangeHint_UpdateContainingBlock, that
|
|
// means that one property's influence on whether we're a containing
|
|
// block for abs-pos or fixed-pos elements has changed. However, we
|
|
// only need to return the hint if the overall computation of
|
|
// whether we establish a containing block has changed.
|
|
|
|
// This depends on data in nsStyleDisplay, nsStyleEffects and
|
|
// nsStyleSVGReset, so we do it here.
|
|
|
|
// Note that it's perhaps good for this test to be last because it
|
|
// doesn't use Peek* functions to get the structs on the old
|
|
// context. But this isn't a big concern because these struct
|
|
// getters should be called during frame construction anyway.
|
|
if (ThreadsafeStyleDisplay()->IsAbsPosContainingBlockForAppropriateFrame(this) ==
|
|
aNewContext->ThreadsafeStyleDisplay()->
|
|
IsAbsPosContainingBlockForAppropriateFrame(aNewContext) &&
|
|
ThreadsafeStyleDisplay()->IsFixedPosContainingBlockForAppropriateFrame(this) ==
|
|
aNewContext->ThreadsafeStyleDisplay()->
|
|
IsFixedPosContainingBlockForAppropriateFrame(aNewContext)) {
|
|
// While some styles that cause the frame to be a containing block
|
|
// has changed, the overall result hasn't.
|
|
hint &= ~nsChangeHint_UpdateContainingBlock;
|
|
}
|
|
}
|
|
|
|
MOZ_ASSERT(NS_IsHintSubset(hint, nsChangeHint_AllHints),
|
|
"Added a new hint without bumping AllHints?");
|
|
return hint & ~nsChangeHint_NeutralChange;
|
|
}
|
|
|
|
namespace mozilla {
|
|
|
|
void
|
|
GeckoStyleContext::EnsureSameStructsCached(nsStyleContext* aOldContext)
|
|
{
|
|
// NOTE(emilio): We could do better here for stylo, where we only call
|
|
// Style##name_() because we need to run FinishStyle, but otherwise this
|
|
// is only a bitwise or.
|
|
//
|
|
// We could reduce the FFI traffic we do only doing it for structs that have
|
|
// non-trivial FinishStyle.
|
|
|
|
#define STYLE_STRUCT(name_, checkdata_cb_) \
|
|
if (aOldContext->PeekStyle##name_()) { \
|
|
Style##name_(); \
|
|
}
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|
|
#ifdef DEBUG
|
|
void nsStyleContext::List(FILE* out, int32_t aIndent, bool aListDescendants)
|
|
{
|
|
nsAutoCString str;
|
|
// Indent
|
|
int32_t ix;
|
|
for (ix = aIndent; --ix >= 0; ) {
|
|
str.AppendLiteral(" ");
|
|
}
|
|
str.Append(nsPrintfCString("%p(%d) parent=%p ",
|
|
(void*)this, IsGecko() ? AsGecko()->mRefCnt : 0,
|
|
IsGecko() ? AsGecko()->GetParent() : nullptr));
|
|
if (mPseudoTag) {
|
|
nsAutoString buffer;
|
|
mPseudoTag->ToString(buffer);
|
|
AppendUTF16toUTF8(buffer, str);
|
|
str.Append(' ');
|
|
}
|
|
|
|
if (IsServo()) {
|
|
fprintf_stderr(out, "%s{ServoComputedData}\n", str.get());
|
|
} else if (nsRuleNode* ruleNode = AsGecko()->RuleNode()) {
|
|
fprintf_stderr(out, "%s{\n", str.get());
|
|
str.Truncate();
|
|
while (ruleNode) {
|
|
nsIStyleRule *styleRule = ruleNode->GetRule();
|
|
if (styleRule) {
|
|
styleRule->List(out, aIndent + 1);
|
|
}
|
|
ruleNode = ruleNode->GetParent();
|
|
}
|
|
for (ix = aIndent; --ix >= 0; ) {
|
|
str.AppendLiteral(" ");
|
|
}
|
|
fprintf_stderr(out, "%s}\n", str.get());
|
|
}
|
|
else {
|
|
fprintf_stderr(out, "%s{}\n", str.get());
|
|
}
|
|
|
|
if (aListDescendants) {
|
|
if (GeckoStyleContext* gecko = GetAsGecko()) {
|
|
gecko->ListDescendants(out, aIndent);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
already_AddRefed<GeckoStyleContext>
|
|
NS_NewStyleContext(GeckoStyleContext* aParentContext,
|
|
nsAtom* aPseudoTag,
|
|
CSSPseudoElementType aPseudoType,
|
|
nsRuleNode* aRuleNode,
|
|
bool aSkipParentDisplayBasedStyleFixup)
|
|
{
|
|
RefPtr<nsRuleNode> node = aRuleNode;
|
|
RefPtr<GeckoStyleContext> context =
|
|
new (aRuleNode->PresContext())
|
|
GeckoStyleContext(aParentContext, aPseudoTag, aPseudoType, node.forget(),
|
|
aSkipParentDisplayBasedStyleFixup);
|
|
return context.forget();
|
|
}
|
|
|
|
nsIPresShell*
|
|
nsStyleContext::Arena()
|
|
{
|
|
return PresContext()->PresShell();
|
|
}
|
|
|
|
template<typename Func>
|
|
static nscolor
|
|
GetVisitedDependentColorInternal(nsStyleContext* aSc, Func aColorFunc)
|
|
{
|
|
nscolor colors[2];
|
|
colors[0] = aColorFunc(aSc);
|
|
if (nsStyleContext* visitedStyle = aSc->GetStyleIfVisited()) {
|
|
colors[1] = aColorFunc(visitedStyle);
|
|
return nsStyleContext::
|
|
CombineVisitedColors(colors, aSc->RelevantLinkVisited());
|
|
}
|
|
return colors[0];
|
|
}
|
|
|
|
static nscolor
|
|
ExtractColor(nsStyleContext* aContext, const nscolor& aColor)
|
|
{
|
|
return aColor;
|
|
}
|
|
|
|
static nscolor
|
|
ExtractColor(nsStyleContext* aContext, const StyleComplexColor& aColor)
|
|
{
|
|
return aContext->StyleColor()->CalcComplexColor(aColor);
|
|
}
|
|
|
|
static nscolor
|
|
ExtractColor(nsStyleContext* aContext, const nsStyleSVGPaint& aPaintServer)
|
|
{
|
|
return aPaintServer.Type() == eStyleSVGPaintType_Color
|
|
? aPaintServer.GetColor() : NS_RGBA(0, 0, 0, 0);
|
|
}
|
|
|
|
#define STYLE_FIELD(struct_, field_) aField == &struct_::field_ ||
|
|
#define STYLE_STRUCT(name_, fields_) \
|
|
template<> nscolor \
|
|
nsStyleContext::GetVisitedDependentColor( \
|
|
decltype(nsStyle##name_::MOZ_ARG_1 fields_) nsStyle##name_::* aField) \
|
|
{ \
|
|
MOZ_ASSERT(MOZ_FOR_EACH(STYLE_FIELD, (nsStyle##name_,), fields_) false, \
|
|
"Getting visited-dependent color for a field in nsStyle"#name_ \
|
|
" which is not listed in nsCSSVisitedDependentPropList.h"); \
|
|
return GetVisitedDependentColorInternal(this, \
|
|
[aField](nsStyleContext* sc) { \
|
|
return ExtractColor(sc, sc->Style##name_()->*aField); \
|
|
}); \
|
|
}
|
|
#include "nsCSSVisitedDependentPropList.h"
|
|
#undef STYLE_STRUCT
|
|
#undef STYLE_FIELD
|
|
|
|
struct ColorIndexSet {
|
|
uint8_t colorIndex, alphaIndex;
|
|
};
|
|
|
|
static const ColorIndexSet gVisitedIndices[2] = { { 0, 0 }, { 1, 0 } };
|
|
|
|
/* static */ nscolor
|
|
nsStyleContext::CombineVisitedColors(nscolor *aColors, bool aLinkIsVisited)
|
|
{
|
|
if (NS_GET_A(aColors[1]) == 0) {
|
|
// If the style-if-visited is transparent, then just use the
|
|
// unvisited style rather than using the (meaningless) color
|
|
// components of the visited style along with a potentially
|
|
// non-transparent alpha value.
|
|
aLinkIsVisited = false;
|
|
}
|
|
|
|
// NOTE: We want this code to have as little timing dependence as
|
|
// possible on whether this->RelevantLinkVisited() is true.
|
|
const ColorIndexSet &set =
|
|
gVisitedIndices[aLinkIsVisited ? 1 : 0];
|
|
|
|
nscolor colorColor = aColors[set.colorIndex];
|
|
nscolor alphaColor = aColors[set.alphaIndex];
|
|
return NS_RGBA(NS_GET_R(colorColor), NS_GET_G(colorColor),
|
|
NS_GET_B(colorColor), NS_GET_A(alphaColor));
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* static */ const char*
|
|
nsStyleContext::StructName(nsStyleStructID aSID)
|
|
{
|
|
switch (aSID) {
|
|
#define STYLE_STRUCT(name_, checkdata_cb) \
|
|
case eStyleStruct_##name_: \
|
|
return #name_;
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
default:
|
|
return "Unknown";
|
|
}
|
|
}
|
|
|
|
/* static */ bool
|
|
nsStyleContext::LookupStruct(const nsACString& aName, nsStyleStructID& aResult)
|
|
{
|
|
if (false)
|
|
;
|
|
#define STYLE_STRUCT(name_, checkdata_cb_) \
|
|
else if (aName.EqualsLiteral(#name_)) \
|
|
aResult = eStyleStruct_##name_;
|
|
#include "nsStyleStructList.h"
|
|
#undef STYLE_STRUCT
|
|
else
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
void
|
|
nsStyleContext::FrameAddRef()
|
|
{
|
|
if (auto gecko = GetAsGecko()) {
|
|
gecko->FrameAddRef();
|
|
}
|
|
}
|
|
|
|
void
|
|
nsStyleContext::FrameRelease()
|
|
{
|
|
if (auto gecko = GetAsGecko()) {
|
|
gecko->FrameRelease();
|
|
}
|
|
}
|
|
#endif
|