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gecko-dev/layout/style/nsCSSDataBlock.cpp
Ting-Yu Lin 754b6c9659 Bug 1317588 Part 3 - Remove #define NS_SIDE_TOP/RIGHT/BOTTOM/LEFT. r=mats 
This patch was written with the help of the following script. Also, manually
add mozilla qualifier to the enum values in nsStyleCoord.h, gfxRect.h, and
Types.h to make it build.

function rename() {
find .\
     -type f\
     ! -path "./obj*"\
     ! -path "./.git"\
     ! -path "./.hg"\
     \( -name "*.cpp" -or\
        -name "*.h" \)\
        -exec sed -i -e "s/$1/$2/g" "{}" \;
}

rename "NS_SIDE_TOP" "eSideTop"
rename "NS_SIDE_RIGHT" "eSideRight"
rename "NS_SIDE_BOTTOM" "eSideBottom"
rename "NS_SIDE_LEFT" "eSideLeft"

MozReview-Commit-ID: 9T0ORsqM6nP

--HG--
extra : rebase_source : 884ad96104c6e9cf6c8b3145d2d3a071ecccfe6a
2016-11-18 18:12:25 +08:00

803 lines
28 KiB
C++
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
/*
* compact representation of the property-value pairs within a CSS
* declaration, and the code for expanding and compacting it
*/
#include "nsCSSDataBlock.h"
#include "CSSVariableImageTable.h"
#include "mozilla/css/Declaration.h"
#include "mozilla/css/ImageLoader.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/WritingModes.h"
#include "nsAutoPtr.h"
#include "nsIDocument.h"
#include "nsRuleData.h"
#include "nsStyleContext.h"
#include "nsStyleSet.h"
using namespace mozilla;
using namespace mozilla::css;
/**
* Does a fast move of aSource to aDest. The previous value in
* aDest is cleanly destroyed, and aSource is cleared. Returns
* true if, before the copy, the value at aSource compared unequal
* to the value at aDest; false otherwise.
*/
static bool
MoveValue(nsCSSValue* aSource, nsCSSValue* aDest)
{
bool changed = (*aSource != *aDest);
aDest->~nsCSSValue();
memcpy(aDest, aSource, sizeof(nsCSSValue));
new (aSource) nsCSSValue();
return changed;
}
static bool
ShouldIgnoreColors(nsRuleData *aRuleData)
{
return aRuleData->mLevel != SheetType::Agent &&
aRuleData->mLevel != SheetType::User &&
!aRuleData->mPresContext->UseDocumentColors();
}
/**
* Tries to call |nsCSSValue::StartImageLoad()| on an image source.
* Image sources are specified by |url()| or |-moz-image-rect()| function.
*/
static void
TryToStartImageLoadOnValue(const nsCSSValue& aValue, nsIDocument* aDocument,
nsStyleContext* aContext, nsCSSPropertyID aProperty,
bool aForTokenStream)
{
MOZ_ASSERT(aDocument);
if (aValue.GetUnit() == eCSSUnit_URL) {
#ifdef MOZ_ENABLE_MASK_AS_SHORTHAND
// The 'mask-image' property accepts local reference URIs.
// For example,
// mask-image: url(#mask_id); // refer to a SVG mask element, whose id is
// // "mask_id", in the current document.
// For such 'mask-image' values (pointing to an in-document element),
// there is no need to trigger image download.
if (aProperty == eCSSProperty_mask_image) {
// Filter out all fragment URLs.
// Since nsCSSValue::GetURLStructValue runs much faster than
// nsIURI::EqualsExceptRef bellow, we get performance gain by this
// early return.
URLValue* urlValue = aValue.GetURLStructValue();
if (urlValue->IsLocalRef()) {
return;
}
// Even though urlValue is not a fragment URL, it might still refer to
// an internal resource.
// For example, aDocument base URL is "http://foo/index.html" and
// intentionally references a mask-image at
// url(http://foo/index.html#mask) which still refers to a resource in
// aDocument.
nsIURI* imageURI = aValue.GetURLValue();
if (imageURI) {
nsIURI* docURI = aDocument->GetDocumentURI();
bool isEqualExceptRef = false;
nsresult rv = imageURI->EqualsExceptRef(docURI, &isEqualExceptRef);
if (NS_SUCCEEDED(rv) && isEqualExceptRef) {
return;
}
}
}
#endif
aValue.StartImageLoad(aDocument);
if (aForTokenStream && aContext) {
CSSVariableImageTable::Add(aContext, aProperty,
aValue.GetImageStructValue());
}
}
else if (aValue.GetUnit() == eCSSUnit_Image) {
// If we already have a request, see if this document needs to clone it.
imgIRequest* request = aValue.GetImageValue(nullptr);
if (request) {
ImageValue* imageValue = aValue.GetImageStructValue();
aDocument->StyleImageLoader()->MaybeRegisterCSSImage(imageValue);
if (aForTokenStream && aContext) {
CSSVariableImageTable::Add(aContext, aProperty, imageValue);
}
}
}
else if (aValue.EqualsFunction(eCSSKeyword__moz_image_rect)) {
nsCSSValue::Array* arguments = aValue.GetArrayValue();
MOZ_ASSERT(arguments->Count() == 6, "unexpected num of arguments");
const nsCSSValue& image = arguments->Item(1);
TryToStartImageLoadOnValue(image, aDocument, aContext, aProperty,
aForTokenStream);
}
}
static void
TryToStartImageLoad(const nsCSSValue& aValue, nsIDocument* aDocument,
nsStyleContext* aContext, nsCSSPropertyID aProperty,
bool aForTokenStream)
{
if (aValue.GetUnit() == eCSSUnit_List) {
for (const nsCSSValueList* l = aValue.GetListValue(); l; l = l->mNext) {
TryToStartImageLoad(l->mValue, aDocument, aContext, aProperty,
aForTokenStream);
}
} else if (nsCSSProps::PropHasFlags(aProperty,
CSS_PROPERTY_IMAGE_IS_IN_ARRAY_0)) {
if (aValue.GetUnit() == eCSSUnit_Array) {
TryToStartImageLoadOnValue(aValue.GetArrayValue()->Item(0), aDocument,
aContext, aProperty, aForTokenStream);
}
} else {
TryToStartImageLoadOnValue(aValue, aDocument, aContext, aProperty,
aForTokenStream);
}
}
static inline bool
ShouldStartImageLoads(nsRuleData *aRuleData, nsCSSPropertyID aProperty)
{
// Don't initiate image loads for if-visited styles. This is
// important because:
// (1) it's a waste of CPU and bandwidth
// (2) in some cases we'd start the image load on a style change
// where we wouldn't have started the load initially, which makes
// which links are visited detectable to Web pages (see bug
// 557287)
return !aRuleData->mStyleContext->IsStyleIfVisited() &&
nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_START_IMAGE_LOADS);
}
static void
MapSinglePropertyInto(nsCSSPropertyID aTargetProp,
const nsCSSValue* aSrcValue,
nsCSSValue* aTargetValue,
nsRuleData* aRuleData)
{
MOZ_ASSERT(!nsCSSProps::PropHasFlags(aTargetProp, CSS_PROPERTY_LOGICAL),
"Can't map into a logical property");
MOZ_ASSERT(aSrcValue->GetUnit() != eCSSUnit_Null, "oops");
// Although aTargetValue is the nsCSSValue we are going to write into,
// we also look at its value before writing into it. This is done
// when aTargetValue is a token stream value, which is the case when we
// have just re-parsed a property that had a variable reference (in
// nsCSSParser::ParsePropertyWithVariableReferences). TryToStartImageLoad
// then records any resulting ImageValue objects in the
// CSSVariableImageTable, to give them the appropriate lifetime.
MOZ_ASSERT(aTargetValue->GetUnit() == eCSSUnit_TokenStream ||
aTargetValue->GetUnit() == eCSSUnit_Null,
"aTargetValue must only be a token stream (when re-parsing "
"properties with variable references) or null");
if (ShouldStartImageLoads(aRuleData, aTargetProp)) {
nsIDocument* doc = aRuleData->mPresContext->Document();
TryToStartImageLoad(*aSrcValue, doc, aRuleData->mStyleContext,
aTargetProp,
aTargetValue->GetUnit() == eCSSUnit_TokenStream);
}
*aTargetValue = *aSrcValue;
if (nsCSSProps::PropHasFlags(aTargetProp,
CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED) &&
ShouldIgnoreColors(aRuleData))
{
if (aTargetProp == eCSSProperty_background_color) {
// Force non-'transparent' background
// colors to the user's default.
if (aTargetValue->IsNonTransparentColor()) {
aTargetValue->SetColorValue(aRuleData->mPresContext->
DefaultBackgroundColor());
}
} else {
// Ignore 'color', 'border-*-color', etc.
*aTargetValue = nsCSSValue();
}
}
}
/**
* If aProperty is a logical property, converts it to the equivalent physical
* property based on writing mode information obtained from aRuleData's
* style context.
*/
static inline void
EnsurePhysicalProperty(nsCSSPropertyID& aProperty, nsRuleData* aRuleData)
{
bool isAxisProperty =
nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_LOGICAL_AXIS);
bool isBlock =
nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_LOGICAL_BLOCK_AXIS);
int index;
if (isAxisProperty) {
LogicalAxis logicalAxis = isBlock ? eLogicalAxisBlock : eLogicalAxisInline;
uint8_t wm = aRuleData->mStyleContext->StyleVisibility()->mWritingMode;
PhysicalAxis axis =
WritingMode::PhysicalAxisForLogicalAxis(wm, logicalAxis);
// We rely on physical axis constants values matching the order of the
// physical properties in the logical group array.
static_assert(eAxisVertical == 0 && eAxisHorizontal == 1,
"unexpected axis constant values");
index = axis;
} else {
bool isEnd =
nsCSSProps::PropHasFlags(aProperty, CSS_PROPERTY_LOGICAL_END_EDGE);
LogicalEdge edge = isEnd ? eLogicalEdgeEnd : eLogicalEdgeStart;
// We handle block axis logical properties separately to save a bit of
// work that the WritingMode constructor does that is unnecessary
// unless we have an inline axis property.
mozilla::Side side;
if (isBlock) {
uint8_t wm = aRuleData->mStyleContext->StyleVisibility()->mWritingMode;
side = WritingMode::PhysicalSideForBlockAxis(wm, edge);
} else {
WritingMode wm(aRuleData->mStyleContext);
side = wm.PhysicalSideForInlineAxis(edge);
}
// We rely on the physical side constant values matching the order of
// the physical properties in the logical group array.
static_assert(eSideTop == 0 && eSideRight == 1 &&
eSideBottom == 2 && eSideLeft == 3,
"unexpected side constant values");
index = side;
}
const nsCSSPropertyID* props = nsCSSProps::LogicalGroup(aProperty);
size_t len = isAxisProperty ? 2 : 4;
#ifdef DEBUG
for (size_t i = 0; i < len; i++) {
MOZ_ASSERT(props[i] != eCSSProperty_UNKNOWN,
"unexpected logical group length");
}
MOZ_ASSERT(props[len] == eCSSProperty_UNKNOWN,
"unexpected logical group length");
#endif
for (size_t i = 0; i < len; i++) {
if (aRuleData->ValueFor(props[i])->GetUnit() == eCSSUnit_Null) {
// A declaration of one of the logical properties in this logical
// group (but maybe not aProperty) would be the winning
// declaration in the cascade. This means that it's reasonably
// likely that this logical property could be the winning
// declaration in the cascade for some values of writing-mode,
// direction, and text-orientation. (It doesn't mean that for
// sure, though. For example, if this is a block-start logical
// property, and all but the bottom physical property were set.
// But the common case we want to hit here is logical declarations
// that are completely overridden by a shorthand.)
//
// If this logical property could be the winning declaration in
// the cascade for some values of writing-mode, direction, and
// text-orientation, then we have to fault the resulting style
// struct out of the rule tree. We can't cache anything on the
// rule tree if it depends on data from the style context, since
// data cached in the rule tree could be used with a style context
// with a different value of the depended-upon data.
uint8_t wm = WritingMode(aRuleData->mStyleContext).GetBits();
aRuleData->mConditions.SetWritingModeDependency(wm);
break;
}
}
aProperty = props[index];
}
void
nsCSSCompressedDataBlock::MapRuleInfoInto(nsRuleData *aRuleData) const
{
// If we have no data for these structs, then return immediately.
// This optimization should make us return most of the time, so we
// have to worry much less (although still some) about the speed of
// the rest of the function.
if (!(aRuleData->mSIDs & mStyleBits))
return;
// We process these in reverse order so that we end up mapping the
// right property when one can be expressed using both logical and
// physical property names.
for (uint32_t i = mNumProps; i-- > 0; ) {
nsCSSPropertyID iProp = PropertyAtIndex(i);
if (nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]) &
aRuleData->mSIDs) {
if (nsCSSProps::PropHasFlags(iProp, CSS_PROPERTY_LOGICAL)) {
EnsurePhysicalProperty(iProp, aRuleData);
}
nsCSSValue* target = aRuleData->ValueFor(iProp);
if (target->GetUnit() == eCSSUnit_Null) {
const nsCSSValue *val = ValueAtIndex(i);
// In order for variable resolution to have the right information
// about the stylesheet level of a value, that level needs to be
// stored on the token stream. We can't do that at creation time
// because the CSS parser (which creates the object) has no idea
// about the stylesheet level, so we do it here instead, where
// the rule walking will have just updated aRuleData.
if (val->GetUnit() == eCSSUnit_TokenStream) {
val->GetTokenStreamValue()->mLevel = aRuleData->mLevel;
}
MapSinglePropertyInto(iProp, val, target, aRuleData);
}
}
}
}
const nsCSSValue*
nsCSSCompressedDataBlock::ValueFor(nsCSSPropertyID aProperty) const
{
MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
"Don't call for shorthands");
// If we have no data for this struct, then return immediately.
// This optimization should make us return most of the time, so we
// have to worry much less (although still some) about the speed of
// the rest of the function.
if (!(nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[aProperty]) &
mStyleBits))
return nullptr;
for (uint32_t i = 0; i < mNumProps; i++) {
if (PropertyAtIndex(i) == aProperty) {
return ValueAtIndex(i);
}
}
return nullptr;
}
bool
nsCSSCompressedDataBlock::TryReplaceValue(nsCSSPropertyID aProperty,
nsCSSExpandedDataBlock& aFromBlock,
bool *aChanged)
{
nsCSSValue* newValue = aFromBlock.PropertyAt(aProperty);
MOZ_ASSERT(newValue && newValue->GetUnit() != eCSSUnit_Null,
"cannot replace with empty value");
const nsCSSValue* oldValue = ValueFor(aProperty);
if (!oldValue) {
*aChanged = false;
return false;
}
*aChanged = MoveValue(newValue, const_cast<nsCSSValue*>(oldValue));
aFromBlock.ClearPropertyBit(aProperty);
return true;
}
nsCSSCompressedDataBlock*
nsCSSCompressedDataBlock::Clone() const
{
nsAutoPtr<nsCSSCompressedDataBlock>
result(new(mNumProps) nsCSSCompressedDataBlock(mNumProps));
result->mStyleBits = mStyleBits;
for (uint32_t i = 0; i < mNumProps; i++) {
result->SetPropertyAtIndex(i, PropertyAtIndex(i));
result->CopyValueToIndex(i, ValueAtIndex(i));
}
return result.forget();
}
nsCSSCompressedDataBlock::~nsCSSCompressedDataBlock()
{
for (uint32_t i = 0; i < mNumProps; i++) {
#ifdef DEBUG
(void)PropertyAtIndex(i); // this checks the property is in range
#endif
const nsCSSValue* val = ValueAtIndex(i);
MOZ_ASSERT(val->GetUnit() != eCSSUnit_Null, "oops");
val->~nsCSSValue();
}
}
/* static */ nsCSSCompressedDataBlock*
nsCSSCompressedDataBlock::CreateEmptyBlock()
{
nsCSSCompressedDataBlock *result = new(0) nsCSSCompressedDataBlock(0);
return result;
}
size_t
nsCSSCompressedDataBlock::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
for (uint32_t i = 0; i < mNumProps; i++) {
n += ValueAtIndex(i)->SizeOfExcludingThis(aMallocSizeOf);
}
return n;
}
bool
nsCSSCompressedDataBlock::HasDefaultBorderImageSlice() const
{
const nsCSSValueList *slice =
ValueFor(eCSSProperty_border_image_slice)->GetListValue();
return !slice->mNext &&
slice->mValue.GetRectValue().AllSidesEqualTo(
nsCSSValue(1.0f, eCSSUnit_Percent));
}
bool
nsCSSCompressedDataBlock::HasDefaultBorderImageWidth() const
{
const nsCSSRect &width =
ValueFor(eCSSProperty_border_image_width)->GetRectValue();
return width.AllSidesEqualTo(nsCSSValue(1.0f, eCSSUnit_Number));
}
bool
nsCSSCompressedDataBlock::HasDefaultBorderImageOutset() const
{
const nsCSSRect &outset =
ValueFor(eCSSProperty_border_image_outset)->GetRectValue();
return outset.AllSidesEqualTo(nsCSSValue(0.0f, eCSSUnit_Number));
}
bool
nsCSSCompressedDataBlock::HasDefaultBorderImageRepeat() const
{
const nsCSSValuePair &repeat =
ValueFor(eCSSProperty_border_image_repeat)->GetPairValue();
return repeat.BothValuesEqualTo(
nsCSSValue(NS_STYLE_BORDER_IMAGE_REPEAT_STRETCH, eCSSUnit_Enumerated));
}
/*****************************************************************************/
nsCSSExpandedDataBlock::nsCSSExpandedDataBlock()
{
AssertInitialState();
}
nsCSSExpandedDataBlock::~nsCSSExpandedDataBlock()
{
AssertInitialState();
}
void
nsCSSExpandedDataBlock::DoExpand(nsCSSCompressedDataBlock *aBlock,
bool aImportant)
{
/*
* Save needless copying and allocation by copying the memory
* corresponding to the stored data in the compressed block.
*/
for (uint32_t i = 0; i < aBlock->mNumProps; i++) {
nsCSSPropertyID iProp = aBlock->PropertyAtIndex(i);
MOZ_ASSERT(!nsCSSProps::IsShorthand(iProp), "out of range");
MOZ_ASSERT(!HasPropertyBit(iProp),
"compressed block has property multiple times");
SetPropertyBit(iProp);
if (aImportant)
SetImportantBit(iProp);
const nsCSSValue* val = aBlock->ValueAtIndex(i);
nsCSSValue* dest = PropertyAt(iProp);
MOZ_ASSERT(val->GetUnit() != eCSSUnit_Null, "oops");
MOZ_ASSERT(dest->GetUnit() == eCSSUnit_Null,
"expanding into non-empty block");
#ifdef NS_BUILD_REFCNT_LOGGING
dest->~nsCSSValue();
#endif
memcpy(dest, val, sizeof(nsCSSValue));
}
// Set the number of properties to zero so that we don't destroy the
// remnants of what we just copied.
aBlock->SetNumPropsToZero();
delete aBlock;
}
void
nsCSSExpandedDataBlock::Expand(nsCSSCompressedDataBlock *aNormalBlock,
nsCSSCompressedDataBlock *aImportantBlock)
{
MOZ_ASSERT(aNormalBlock, "unexpected null block");
AssertInitialState();
DoExpand(aNormalBlock, false);
if (aImportantBlock) {
DoExpand(aImportantBlock, true);
}
}
void
nsCSSExpandedDataBlock::ComputeNumProps(uint32_t* aNumPropsNormal,
uint32_t* aNumPropsImportant)
{
*aNumPropsNormal = *aNumPropsImportant = 0;
for (size_t iHigh = 0; iHigh < nsCSSPropertyIDSet::kChunkCount; ++iHigh) {
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
continue;
for (size_t iLow = 0; iLow < nsCSSPropertyIDSet::kBitsInChunk; ++iLow) {
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
continue;
#ifdef DEBUG
nsCSSPropertyID iProp = nsCSSPropertyIDSet::CSSPropertyAt(iHigh, iLow);
#endif
MOZ_ASSERT(!nsCSSProps::IsShorthand(iProp), "out of range");
MOZ_ASSERT(PropertyAt(iProp)->GetUnit() != eCSSUnit_Null,
"null value while computing size");
if (mPropertiesImportant.HasPropertyAt(iHigh, iLow))
(*aNumPropsImportant)++;
else
(*aNumPropsNormal)++;
}
}
}
void
nsCSSExpandedDataBlock::Compress(nsCSSCompressedDataBlock **aNormalBlock,
nsCSSCompressedDataBlock **aImportantBlock,
const nsTArray<uint32_t>& aOrder)
{
nsAutoPtr<nsCSSCompressedDataBlock> result_normal, result_important;
uint32_t i_normal = 0, i_important = 0;
uint32_t numPropsNormal, numPropsImportant;
ComputeNumProps(&numPropsNormal, &numPropsImportant);
result_normal =
new(numPropsNormal) nsCSSCompressedDataBlock(numPropsNormal);
if (numPropsImportant != 0) {
result_important =
new(numPropsImportant) nsCSSCompressedDataBlock(numPropsImportant);
} else {
result_important = nullptr;
}
/*
* Save needless copying and allocation by copying the memory
* corresponding to the stored data in the expanded block, and then
* clearing the data in the expanded block.
*/
for (size_t i = 0; i < aOrder.Length(); i++) {
nsCSSPropertyID iProp = static_cast<nsCSSPropertyID>(aOrder[i]);
if (iProp >= eCSSProperty_COUNT) {
// a custom property
continue;
}
MOZ_ASSERT(mPropertiesSet.HasProperty(iProp),
"aOrder identifies a property not in the expanded "
"data block");
MOZ_ASSERT(!nsCSSProps::IsShorthand(iProp), "out of range");
bool important = mPropertiesImportant.HasProperty(iProp);
nsCSSCompressedDataBlock *result =
important ? result_important : result_normal;
uint32_t* ip = important ? &i_important : &i_normal;
nsCSSValue* val = PropertyAt(iProp);
MOZ_ASSERT(val->GetUnit() != eCSSUnit_Null,
"Null value while compressing");
result->SetPropertyAtIndex(*ip, iProp);
result->RawCopyValueToIndex(*ip, val);
new (val) nsCSSValue();
(*ip)++;
result->mStyleBits |=
nsCachedStyleData::GetBitForSID(nsCSSProps::kSIDTable[iProp]);
}
MOZ_ASSERT(numPropsNormal == i_normal, "bad numProps");
if (result_important) {
MOZ_ASSERT(numPropsImportant == i_important, "bad numProps");
}
#ifdef DEBUG
{
// assert that we didn't have any other properties on this expanded data
// block that we didn't find in aOrder
uint32_t numPropsInSet = 0;
for (size_t iHigh = 0; iHigh < nsCSSPropertyIDSet::kChunkCount; iHigh++) {
if (!mPropertiesSet.HasPropertyInChunk(iHigh)) {
continue;
}
for (size_t iLow = 0; iLow < nsCSSPropertyIDSet::kBitsInChunk; iLow++) {
if (mPropertiesSet.HasPropertyAt(iHigh, iLow)) {
numPropsInSet++;
}
}
}
MOZ_ASSERT(numPropsNormal + numPropsImportant == numPropsInSet,
"aOrder missing properties from the expanded data block");
}
#endif
ClearSets();
AssertInitialState();
*aNormalBlock = result_normal.forget();
*aImportantBlock = result_important.forget();
}
void
nsCSSExpandedDataBlock::AddLonghandProperty(nsCSSPropertyID aProperty,
const nsCSSValue& aValue)
{
MOZ_ASSERT(!nsCSSProps::IsShorthand(aProperty),
"property out of range");
nsCSSValue& storage = *static_cast<nsCSSValue*>(PropertyAt(aProperty));
storage = aValue;
SetPropertyBit(aProperty);
}
void
nsCSSExpandedDataBlock::Clear()
{
for (size_t iHigh = 0; iHigh < nsCSSPropertyIDSet::kChunkCount; ++iHigh) {
if (!mPropertiesSet.HasPropertyInChunk(iHigh))
continue;
for (size_t iLow = 0; iLow < nsCSSPropertyIDSet::kBitsInChunk; ++iLow) {
if (!mPropertiesSet.HasPropertyAt(iHigh, iLow))
continue;
nsCSSPropertyID iProp = nsCSSPropertyIDSet::CSSPropertyAt(iHigh, iLow);
ClearLonghandProperty(iProp);
}
}
AssertInitialState();
}
void
nsCSSExpandedDataBlock::ClearProperty(nsCSSPropertyID aPropID)
{
if (nsCSSProps::IsShorthand(aPropID)) {
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(
p, aPropID, CSSEnabledState::eIgnoreEnabledState) {
ClearLonghandProperty(*p);
}
} else {
ClearLonghandProperty(aPropID);
}
}
void
nsCSSExpandedDataBlock::ClearLonghandProperty(nsCSSPropertyID aPropID)
{
MOZ_ASSERT(!nsCSSProps::IsShorthand(aPropID), "out of range");
ClearPropertyBit(aPropID);
ClearImportantBit(aPropID);
PropertyAt(aPropID)->Reset();
}
bool
nsCSSExpandedDataBlock::TransferFromBlock(nsCSSExpandedDataBlock& aFromBlock,
nsCSSPropertyID aPropID,
CSSEnabledState aEnabledState,
bool aIsImportant,
bool aOverrideImportant,
bool aMustCallValueAppended,
css::Declaration* aDeclaration,
nsIDocument* aSheetDocument)
{
if (!nsCSSProps::IsShorthand(aPropID)) {
return DoTransferFromBlock(aFromBlock, aPropID,
aIsImportant, aOverrideImportant,
aMustCallValueAppended, aDeclaration,
aSheetDocument);
}
// We can pass CSSEnabledState::eIgnore (here, and in ClearProperty
// above) rather than a value corresponding to whether we're parsing
// a UA style sheet or certified app because we assert in nsCSSProps::
// AddRefTable that shorthand properties available in these contexts
// also have all of their subproperties available in these contexts.
bool changed = false;
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aPropID, aEnabledState) {
changed |= DoTransferFromBlock(aFromBlock, *p,
aIsImportant, aOverrideImportant,
aMustCallValueAppended, aDeclaration,
aSheetDocument);
}
return changed;
}
bool
nsCSSExpandedDataBlock::DoTransferFromBlock(nsCSSExpandedDataBlock& aFromBlock,
nsCSSPropertyID aPropID,
bool aIsImportant,
bool aOverrideImportant,
bool aMustCallValueAppended,
css::Declaration* aDeclaration,
nsIDocument* aSheetDocument)
{
bool changed = false;
MOZ_ASSERT(aFromBlock.HasPropertyBit(aPropID), "oops");
if (aIsImportant) {
if (!HasImportantBit(aPropID))
changed = true;
SetImportantBit(aPropID);
} else {
if (HasImportantBit(aPropID)) {
// When parsing a declaration block, an !important declaration
// is not overwritten by an ordinary declaration of the same
// property later in the block. However, CSSOM manipulations
// come through here too, and in that case we do want to
// overwrite the property.
if (!aOverrideImportant) {
aFromBlock.ClearLonghandProperty(aPropID);
return false;
}
changed = true;
ClearImportantBit(aPropID);
}
}
if (aMustCallValueAppended || !HasPropertyBit(aPropID)) {
aDeclaration->ValueAppended(aPropID);
}
if (aSheetDocument) {
UseCounter useCounter = nsCSSProps::UseCounterFor(aPropID);
if (useCounter != eUseCounter_UNKNOWN) {
aSheetDocument->SetDocumentAndPageUseCounter(useCounter);
}
}
SetPropertyBit(aPropID);
aFromBlock.ClearPropertyBit(aPropID);
/*
* Save needless copying and allocation by calling the destructor in
* the destination, copying memory directly, and then using placement
* new.
*/
changed |= MoveValue(aFromBlock.PropertyAt(aPropID), PropertyAt(aPropID));
return changed;
}
void
nsCSSExpandedDataBlock::MapRuleInfoInto(nsCSSPropertyID aPropID,
nsRuleData* aRuleData) const
{
MOZ_ASSERT(!nsCSSProps::IsShorthand(aPropID));
const nsCSSValue* src = PropertyAt(aPropID);
MOZ_ASSERT(src->GetUnit() != eCSSUnit_Null);
nsCSSPropertyID physicalProp = aPropID;
if (nsCSSProps::PropHasFlags(aPropID, CSS_PROPERTY_LOGICAL)) {
EnsurePhysicalProperty(physicalProp, aRuleData);
}
nsCSSValue* dest = aRuleData->ValueFor(physicalProp);
MOZ_ASSERT(dest->GetUnit() == eCSSUnit_TokenStream &&
dest->GetTokenStreamValue()->mPropertyID == aPropID);
CSSVariableImageTable::ReplaceAll(aRuleData->mStyleContext, aPropID, [=] {
MapSinglePropertyInto(physicalProp, src, dest, aRuleData);
});
}
#ifdef DEBUG
void
nsCSSExpandedDataBlock::DoAssertInitialState()
{
mPropertiesSet.AssertIsEmpty("not initial state");
mPropertiesImportant.AssertIsEmpty("not initial state");
for (uint32_t i = 0; i < eCSSProperty_COUNT_no_shorthands; ++i) {
nsCSSPropertyID prop = nsCSSPropertyID(i);
MOZ_ASSERT(PropertyAt(prop)->GetUnit() == eCSSUnit_Null,
"not initial state");
}
}
#endif
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