gecko/layout/style/nsCSSRules.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* 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/. */
/* rules in a CSS stylesheet other than style rules (e.g., @import rules) */
#include "mozilla/Attributes.h"
#include "nsCSSRules.h"
#include "nsCSSValue.h"
#include "mozilla/css/ImportRule.h"
#include "mozilla/css/NameSpaceRule.h"
#include "nsString.h"
#include "nsIAtom.h"
#include "nsCSSProps.h"
#include "nsCSSStyleSheet.h"
#include "nsCOMPtr.h"
#include "nsIDOMCSSStyleSheet.h"
#include "nsIMediaList.h"
#include "nsICSSRuleList.h"
#include "nsIDocument.h"
#include "nsPresContext.h"
#include "nsContentUtils.h"
#include "nsError.h"
#include "nsStyleUtil.h"
#include "mozilla/css/Declaration.h"
#include "nsCSSParser.h"
#include "nsPrintfCString.h"
#include "nsDOMClassInfoID.h"
#include "mozilla/dom/CSSStyleDeclarationBinding.h"
#include "StyleRule.h"
using namespace mozilla;
#define IMPL_STYLE_RULE_INHERIT_GET_DOM_RULE_WEAK(class_, super_) \
/* virtual */ nsIDOMCSSRule* class_::GetDOMRule() \
{ return this; } \
/* virtual */ nsIDOMCSSRule* class_::GetExistingDOMRule() \
{ return this; }
#define IMPL_STYLE_RULE_INHERIT_MAP_RULE_INFO_INTO(class_, super_) \
/* virtual */ void class_::MapRuleInfoInto(nsRuleData* aRuleData) \
{ NS_ABORT_IF_FALSE(false, "should not be called"); }
#define IMPL_STYLE_RULE_INHERIT(class_, super_) \
IMPL_STYLE_RULE_INHERIT_GET_DOM_RULE_WEAK(class_, super_) \
IMPL_STYLE_RULE_INHERIT_MAP_RULE_INFO_INTO(class_, super_)
// base class for all rule types in a CSS style sheet
namespace mozilla {
namespace css {
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet*
Rule::GetStyleSheet() const
{
if (!(mSheet & 0x1)) {
return reinterpret_cast<nsCSSStyleSheet*>(mSheet);
}
return nullptr;
}
nsHTMLCSSStyleSheet*
Rule::GetHTMLCSSStyleSheet() const
{
if (mSheet & 0x1) {
return reinterpret_cast<nsHTMLCSSStyleSheet*>(mSheet & ~uintptr_t(0x1));
}
return nullptr;
}
/* virtual */ void
Rule::SetStyleSheet(nsCSSStyleSheet* aSheet)
{
// We don't reference count this up reference. The style sheet
// will tell us when it's going away or when we're detached from
// it.
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
mSheet = reinterpret_cast<uintptr_t>(aSheet);
}
void
Rule::SetHTMLCSSStyleSheet(nsHTMLCSSStyleSheet* aSheet)
{
// We don't reference count this up reference. The style sheet
// will tell us when it's going away or when we're detached from
// it.
mSheet = reinterpret_cast<uintptr_t>(aSheet);
mSheet |= 0x1;
}
nsresult
Rule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
if (mParentRule) {
NS_IF_ADDREF(*aParentRule = mParentRule->GetDOMRule());
} else {
*aParentRule = nullptr;
}
return NS_OK;
}
nsresult
Rule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
NS_ENSURE_ARG_POINTER(aSheet);
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
NS_IF_ADDREF(*aSheet = GetStyleSheet());
return NS_OK;
}
size_t
Rule::SizeOfCOMArrayElementIncludingThis(css::Rule* aElement,
nsMallocSizeOfFun aMallocSizeOf,
void* aData)
{
return aElement->SizeOfIncludingThis(aMallocSizeOf);
}
// -------------------------------
// Style Rule List for group rules
//
class GroupRuleRuleList MOZ_FINAL : public nsICSSRuleList
{
public:
GroupRuleRuleList(GroupRule *aGroupRule);
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMCSSRULELIST
virtual nsIDOMCSSRule* GetItemAt(uint32_t aIndex, nsresult* aResult);
void DropReference() { mGroupRule = nullptr; }
private:
~GroupRuleRuleList();
private:
GroupRule* mGroupRule;
};
GroupRuleRuleList::GroupRuleRuleList(GroupRule *aGroupRule)
{
// Not reference counted to avoid circular references.
// The rule will tell us when its going away.
mGroupRule = aGroupRule;
}
GroupRuleRuleList::~GroupRuleRuleList()
{
}
// QueryInterface implementation for CSSGroupRuleRuleList
NS_INTERFACE_MAP_BEGIN(GroupRuleRuleList)
NS_INTERFACE_MAP_ENTRY(nsICSSRuleList)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRuleList)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSGroupRuleRuleList)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(GroupRuleRuleList)
NS_IMPL_RELEASE(GroupRuleRuleList)
NS_IMETHODIMP
GroupRuleRuleList::GetLength(uint32_t* aLength)
{
if (mGroupRule) {
*aLength = (uint32_t)mGroupRule->StyleRuleCount();
} else {
*aLength = 0;
}
return NS_OK;
}
nsIDOMCSSRule*
GroupRuleRuleList::GetItemAt(uint32_t aIndex, nsresult* aResult)
{
*aResult = NS_OK;
if (mGroupRule) {
nsRefPtr<Rule> rule = mGroupRule->GetStyleRuleAt(aIndex);
if (rule) {
return rule->GetDOMRule();
}
}
return nullptr;
}
NS_IMETHODIMP
GroupRuleRuleList::Item(uint32_t aIndex, nsIDOMCSSRule** aReturn)
{
nsresult rv;
nsIDOMCSSRule* rule = GetItemAt(aIndex, &rv);
if (!rule) {
*aReturn = nullptr;
return rv;
}
NS_ADDREF(*aReturn = rule);
return NS_OK;
}
} // namespace css
} // namespace mozilla
// Must be outside the namespace
DOMCI_DATA(CSSGroupRuleRuleList, css::GroupRuleRuleList)
// -------------------------------------------
// CharsetRule
//
// Must be outside namespace
DOMCI_DATA(CSSCharsetRule, css::CharsetRule)
namespace mozilla {
namespace css {
CharsetRule::CharsetRule(const nsAString& aEncoding)
: Rule(),
mEncoding(aEncoding)
{
}
CharsetRule::CharsetRule(const CharsetRule& aCopy)
: Rule(aCopy),
mEncoding(aCopy.mEncoding)
{
}
NS_IMPL_ADDREF(CharsetRule)
NS_IMPL_RELEASE(CharsetRule)
// QueryInterface implementation for CharsetRule
NS_INTERFACE_MAP_BEGIN(CharsetRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSCharsetRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSCharsetRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT(CharsetRule, Rule)
#ifdef DEBUG
/* virtual */ void
CharsetRule::List(FILE* out, int32_t aIndent) const
{
// Indent
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("@charset \"", out);
fputs(NS_LossyConvertUTF16toASCII(mEncoding).get(), out);
fputs("\"\n", out);
}
#endif
/* virtual */ int32_t
CharsetRule::GetType() const
{
return Rule::CHARSET_RULE;
}
/* virtual */ already_AddRefed<Rule>
CharsetRule::Clone() const
{
nsRefPtr<Rule> clone = new CharsetRule(*this);
return clone.forget();
}
NS_IMETHODIMP
CharsetRule::GetEncoding(nsAString& aEncoding)
{
aEncoding = mEncoding;
return NS_OK;
}
NS_IMETHODIMP
CharsetRule::SetEncoding(const nsAString& aEncoding)
{
mEncoding = aEncoding;
return NS_OK;
}
NS_IMETHODIMP
CharsetRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::CHARSET_RULE;
return NS_OK;
}
NS_IMETHODIMP
CharsetRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@charset \"");
aCssText.Append(mEncoding);
aCssText.AppendLiteral("\";");
return NS_OK;
}
NS_IMETHODIMP
CharsetRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
CharsetRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return Rule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
CharsetRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return Rule::GetParentRule(aParentRule);
}
/* virtual */ size_t
CharsetRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mEncoding
}
// -------------------------------------------
// ImportRule
//
ImportRule::ImportRule(nsMediaList* aMedia, const nsString& aURLSpec)
: Rule()
, mURLSpec(aURLSpec)
, mMedia(aMedia)
{
// XXXbz This is really silly.... the mMedia here will be replaced
// with itself if we manage to load a sheet. Which should really
// never fail nowadays, in sane cases.
}
ImportRule::ImportRule(const ImportRule& aCopy)
: Rule(aCopy),
mURLSpec(aCopy.mURLSpec)
{
// Whether or not an @import rule has a null sheet is a permanent
// property of that @import rule, since it is null only if the target
// sheet failed security checks.
if (aCopy.mChildSheet) {
nsRefPtr<nsCSSStyleSheet> sheet =
aCopy.mChildSheet->Clone(nullptr, this, nullptr, nullptr);
SetSheet(sheet);
// SetSheet sets mMedia appropriately
}
}
ImportRule::~ImportRule()
{
if (mChildSheet) {
mChildSheet->SetOwnerRule(nullptr);
}
}
NS_IMPL_ADDREF(ImportRule)
NS_IMPL_RELEASE(ImportRule)
// QueryInterface implementation for ImportRule
NS_INTERFACE_MAP_BEGIN(ImportRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSImportRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSImportRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT(ImportRule, Rule)
#ifdef DEBUG
/* virtual */ void
ImportRule::List(FILE* out, int32_t aIndent) const
{
// Indent
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("@import \"", out);
fputs(NS_LossyConvertUTF16toASCII(mURLSpec).get(), out);
fputs("\" ", out);
nsAutoString mediaText;
mMedia->GetText(mediaText);
fputs(NS_LossyConvertUTF16toASCII(mediaText).get(), out);
fputs("\n", out);
}
#endif
/* virtual */ int32_t
ImportRule::GetType() const
{
return Rule::IMPORT_RULE;
}
/* virtual */ already_AddRefed<Rule>
ImportRule::Clone() const
{
nsRefPtr<Rule> clone = new ImportRule(*this);
return clone.forget();
}
void
ImportRule::SetSheet(nsCSSStyleSheet* aSheet)
{
NS_PRECONDITION(aSheet, "null arg");
// set the new sheet
mChildSheet = aSheet;
aSheet->SetOwnerRule(this);
// set our medialist to be the same as the sheet's medialist
nsCOMPtr<nsIDOMMediaList> mediaList;
mChildSheet->GetMedia(getter_AddRefs(mediaList));
NS_ABORT_IF_FALSE(mediaList, "GetMedia returned null");
mMedia = static_cast<nsMediaList*>(mediaList.get());
}
NS_IMETHODIMP
ImportRule::GetType(uint16_t* aType)
{
NS_ENSURE_ARG_POINTER(aType);
*aType = nsIDOMCSSRule::IMPORT_RULE;
return NS_OK;
}
NS_IMETHODIMP
ImportRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@import url(");
nsStyleUtil::AppendEscapedCSSString(mURLSpec, aCssText);
aCssText.Append(NS_LITERAL_STRING(")"));
if (mMedia) {
nsAutoString mediaText;
mMedia->GetText(mediaText);
if (!mediaText.IsEmpty()) {
aCssText.AppendLiteral(" ");
aCssText.Append(mediaText);
}
}
aCssText.AppendLiteral(";");
return NS_OK;
}
NS_IMETHODIMP
ImportRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
ImportRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return Rule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
ImportRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return Rule::GetParentRule(aParentRule);
}
NS_IMETHODIMP
ImportRule::GetHref(nsAString & aHref)
{
aHref = mURLSpec;
return NS_OK;
}
NS_IMETHODIMP
ImportRule::GetMedia(nsIDOMMediaList * *aMedia)
{
NS_ENSURE_ARG_POINTER(aMedia);
NS_IF_ADDREF(*aMedia = mMedia);
return NS_OK;
}
NS_IMETHODIMP
ImportRule::GetStyleSheet(nsIDOMCSSStyleSheet * *aStyleSheet)
{
NS_ENSURE_ARG_POINTER(aStyleSheet);
NS_IF_ADDREF(*aStyleSheet = mChildSheet);
return NS_OK;
}
/* virtual */ size_t
ImportRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mURLSpec
//
// The following members are not measured:
// - mMedia, because it is measured via nsCSSStyleSheet::mMedia
// - mChildSheet, because it is measured via nsCSSStyleSheetInner::mSheets
}
} // namespace css
} // namespace mozilla
// must be outside the namespace
DOMCI_DATA(CSSImportRule, css::ImportRule)
static bool
CloneRuleInto(css::Rule* aRule, void* aArray)
{
nsRefPtr<css::Rule> clone = aRule->Clone();
static_cast<nsCOMArray<css::Rule>*>(aArray)->AppendObject(clone);
return true;
}
namespace mozilla {
namespace css {
GroupRule::GroupRule()
: Rule()
{
}
static bool
SetParentRuleReference(Rule* aRule, void* aParentRule)
{
GroupRule* parentRule = static_cast<GroupRule*>(aParentRule);
aRule->SetParentRule(parentRule);
return true;
}
GroupRule::GroupRule(const GroupRule& aCopy)
: Rule(aCopy)
{
const_cast<GroupRule&>(aCopy).mRules.EnumerateForwards(CloneRuleInto, &mRules);
mRules.EnumerateForwards(SetParentRuleReference, this);
}
GroupRule::~GroupRule()
{
NS_ABORT_IF_FALSE(!mSheet, "SetStyleSheet should have been called");
mRules.EnumerateForwards(SetParentRuleReference, nullptr);
if (mRuleCollection) {
mRuleCollection->DropReference();
}
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(GroupRule)
NS_IMPL_CYCLE_COLLECTING_RELEASE(GroupRule)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GroupRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT_MAP_RULE_INFO_INTO(GroupRule, Rule)
static bool
SetStyleSheetReference(Rule* aRule, void* aSheet)
{
nsCSSStyleSheet* sheet = (nsCSSStyleSheet*)aSheet;
aRule->SetStyleSheet(sheet);
return true;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(GroupRule)
tmp->mRules.EnumerateForwards(SetParentRuleReference, nullptr);
// If tmp does not have a stylesheet, neither do its descendants. In that
// case, don't try to null out their stylesheet, to avoid O(N^2) behavior in
// depth of group rule nesting. But if tmp _does_ have a stylesheet (which
// can happen if it gets unlinked earlier than its owning stylesheet), then we
// need to null out the stylesheet pointer on descendants now, before we clear
// tmp->mRules.
if (tmp->GetStyleSheet()) {
tmp->mRules.EnumerateForwards(SetStyleSheetReference, nullptr);
}
tmp->mRules.Clear();
if (tmp->mRuleCollection) {
tmp->mRuleCollection->DropReference();
tmp->mRuleCollection = nullptr;
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(GroupRule)
const nsCOMArray<Rule>& rules = tmp->mRules;
for (int32_t i = 0, count = rules.Count(); i < count; ++i) {
NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mRules[i]");
cb.NoteXPCOMChild(rules[i]->GetExistingDOMRule());
}
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRuleCollection)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
/* virtual */ void
GroupRule::SetStyleSheet(nsCSSStyleSheet* aSheet)
{
// Don't set the sheet on the kids if it's already the same as the sheet we
// already have. This is needed to avoid O(N^2) behavior in group nesting
// depth when seting the sheet to null during unlink, if we happen to unlin in
// order from most nested rule up to least nested rule.
if (aSheet != GetStyleSheet()) {
mRules.EnumerateForwards(SetStyleSheetReference, aSheet);
Rule::SetStyleSheet(aSheet);
}
}
#ifdef DEBUG
/* virtual */ void
GroupRule::List(FILE* out, int32_t aIndent) const
{
fputs(" {\n", out);
for (int32_t index = 0, count = mRules.Count(); index < count; ++index) {
mRules.ObjectAt(index)->List(out, aIndent + 1);
}
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("}\n", out);
}
#endif
void
GroupRule::AppendStyleRule(Rule* aRule)
{
mRules.AppendObject(aRule);
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
aRule->SetStyleSheet(sheet);
aRule->SetParentRule(this);
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
if (sheet) {
sheet->SetModifiedByChildRule();
}
}
Rule*
GroupRule::GetStyleRuleAt(int32_t aIndex) const
{
return mRules.SafeObjectAt(aIndex);
}
bool
GroupRule::EnumerateRulesForwards(RuleEnumFunc aFunc, void * aData) const
{
return
const_cast<GroupRule*>(this)->mRules.EnumerateForwards(aFunc, aData);
}
/*
* The next two methods (DeleteStyleRuleAt and InsertStyleRuleAt)
* should never be called unless you have first called WillDirty() on
* the parents stylesheet. After they are called, DidDirty() needs to
* be called on the sheet
*/
nsresult
GroupRule::DeleteStyleRuleAt(uint32_t aIndex)
{
Rule* rule = mRules.SafeObjectAt(aIndex);
if (rule) {
rule->SetStyleSheet(nullptr);
rule->SetParentRule(nullptr);
}
return mRules.RemoveObjectAt(aIndex) ? NS_OK : NS_ERROR_ILLEGAL_VALUE;
}
nsresult
GroupRule::InsertStyleRuleAt(uint32_t aIndex, Rule* aRule)
{
aRule->SetStyleSheet(GetStyleSheet());
aRule->SetParentRule(this);
if (! mRules.InsertObjectAt(aRule, aIndex)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult
GroupRule::ReplaceStyleRule(Rule* aOld, Rule* aNew)
{
int32_t index = mRules.IndexOf(aOld);
NS_ENSURE_TRUE(index != -1, NS_ERROR_UNEXPECTED);
mRules.ReplaceObjectAt(aNew, index);
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
aNew->SetStyleSheet(GetStyleSheet());
aNew->SetParentRule(this);
aOld->SetStyleSheet(nullptr);
aOld->SetParentRule(nullptr);
return NS_OK;
}
nsresult
GroupRule::AppendRulesToCssText(nsAString& aCssText)
{
aCssText.AppendLiteral(" {\n");
// get all the rules
for (int32_t index = 0, count = mRules.Count(); index < count; ++index) {
Rule* rule = mRules.ObjectAt(index);
nsIDOMCSSRule* domRule = rule->GetDOMRule();
if (domRule) {
nsAutoString cssText;
domRule->GetCssText(cssText);
aCssText.Append(NS_LITERAL_STRING(" ") +
cssText +
NS_LITERAL_STRING("\n"));
}
}
aCssText.AppendLiteral("}");
return NS_OK;
}
// nsIDOMCSSMediaRule or nsIDOMCSSMozDocumentRule methods
nsresult
GroupRule::GetCssRules(nsIDOMCSSRuleList* *aRuleList)
{
if (!mRuleCollection) {
mRuleCollection = new css::GroupRuleRuleList(this);
}
NS_ADDREF(*aRuleList = mRuleCollection);
return NS_OK;
}
nsresult
GroupRule::InsertRule(const nsAString & aRule, uint32_t aIndex, uint32_t* _retval)
{
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
NS_ENSURE_TRUE(sheet, NS_ERROR_FAILURE);
if (aIndex > uint32_t(mRules.Count()))
return NS_ERROR_DOM_INDEX_SIZE_ERR;
NS_ASSERTION(uint32_t(mRules.Count()) <= INT32_MAX,
"Too many style rules!");
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
return sheet->InsertRuleIntoGroup(aRule, this, aIndex, _retval);
}
nsresult
GroupRule::DeleteRule(uint32_t aIndex)
{
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
NS_ENSURE_TRUE(sheet, NS_ERROR_FAILURE);
if (aIndex >= uint32_t(mRules.Count()))
return NS_ERROR_DOM_INDEX_SIZE_ERR;
NS_ASSERTION(uint32_t(mRules.Count()) <= INT32_MAX,
"Too many style rules!");
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
return sheet->DeleteRuleFromGroup(this, aIndex);
}
/* virtual */ size_t
GroupRule::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return mRules.SizeOfExcludingThis(Rule::SizeOfCOMArrayElementIncludingThis,
aMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mRuleCollection
}
// -------------------------------------------
// nsICSSMediaRule
//
MediaRule::MediaRule()
{
}
MediaRule::MediaRule(const MediaRule& aCopy)
: GroupRule(aCopy)
{
if (aCopy.mMedia) {
aCopy.mMedia->Clone(getter_AddRefs(mMedia));
if (mMedia) {
// XXXldb This doesn't really make sense.
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
mMedia->SetStyleSheet(aCopy.GetStyleSheet());
}
}
}
MediaRule::~MediaRule()
{
if (mMedia) {
mMedia->SetStyleSheet(nullptr);
}
}
NS_IMPL_ADDREF_INHERITED(MediaRule, GroupRule)
NS_IMPL_RELEASE_INHERITED(MediaRule, GroupRule)
// QueryInterface implementation for MediaRule
NS_INTERFACE_MAP_BEGIN(MediaRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSGroupingRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSConditionRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSMediaRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSMediaRule)
NS_INTERFACE_MAP_END_INHERITING(GroupRule)
/* virtual */ void
MediaRule::SetStyleSheet(nsCSSStyleSheet* aSheet)
{
if (mMedia) {
// Set to null so it knows it's leaving one sheet and joining another.
mMedia->SetStyleSheet(nullptr);
mMedia->SetStyleSheet(aSheet);
}
GroupRule::SetStyleSheet(aSheet);
}
#ifdef DEBUG
/* virtual */ void
MediaRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
nsAutoString buffer;
fputs("@media ", out);
if (mMedia) {
nsAutoString mediaText;
mMedia->GetText(mediaText);
fputs(NS_LossyConvertUTF16toASCII(mediaText).get(), out);
}
GroupRule::List(out, aIndent);
}
#endif
/* virtual */ int32_t
MediaRule::GetType() const
{
return Rule::MEDIA_RULE;
}
/* virtual */ already_AddRefed<Rule>
MediaRule::Clone() const
{
nsRefPtr<Rule> clone = new MediaRule(*this);
return clone.forget();
}
nsresult
MediaRule::SetMedia(nsMediaList* aMedia)
{
mMedia = aMedia;
if (aMedia)
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
mMedia->SetStyleSheet(GetStyleSheet());
return NS_OK;
}
// nsIDOMCSSRule methods
NS_IMETHODIMP
MediaRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::MEDIA_RULE;
return NS_OK;
}
NS_IMETHODIMP
MediaRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@media ");
AppendConditionText(aCssText);
return GroupRule::AppendRulesToCssText(aCssText);
}
NS_IMETHODIMP
MediaRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
MediaRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return GroupRule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
MediaRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return GroupRule::GetParentRule(aParentRule);
}
// nsIDOMCSSGroupingRule methods
NS_IMETHODIMP
MediaRule::GetCssRules(nsIDOMCSSRuleList* *aRuleList)
{
return GroupRule::GetCssRules(aRuleList);
}
NS_IMETHODIMP
MediaRule::InsertRule(const nsAString & aRule, uint32_t aIndex, uint32_t* _retval)
{
return GroupRule::InsertRule(aRule, aIndex, _retval);
}
NS_IMETHODIMP
MediaRule::DeleteRule(uint32_t aIndex)
{
return GroupRule::DeleteRule(aIndex);
}
// nsIDOMCSSConditionRule methods
NS_IMETHODIMP
MediaRule::GetConditionText(nsAString& aConditionText)
{
aConditionText.Truncate(0);
AppendConditionText(aConditionText);
return NS_OK;
}
NS_IMETHODIMP
MediaRule::SetConditionText(const nsAString& aConditionText)
{
if (!mMedia) {
nsRefPtr<nsMediaList> media = new nsMediaList();
media->SetStyleSheet(GetStyleSheet());
nsresult rv = media->SetMediaText(aConditionText);
if (NS_SUCCEEDED(rv)) {
mMedia = media;
}
return rv;
}
return mMedia->SetMediaText(aConditionText);
}
// nsIDOMCSSMediaRule methods
NS_IMETHODIMP
MediaRule::GetMedia(nsIDOMMediaList* *aMedia)
{
NS_ENSURE_ARG_POINTER(aMedia);
NS_IF_ADDREF(*aMedia = mMedia);
return NS_OK;
}
// GroupRule interface
/* virtual */ bool
MediaRule::UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey)
{
if (mMedia) {
return mMedia->Matches(aPresContext, &aKey);
}
return true;
}
/* virtual */ size_t
MediaRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
n += GroupRule::SizeOfExcludingThis(aMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mMedia
return n;
}
void
MediaRule::AppendConditionText(nsAString& aOutput)
{
if (mMedia) {
nsAutoString mediaText;
mMedia->GetText(mediaText);
aOutput.Append(mediaText);
}
}
} // namespace css
} // namespace mozilla
// Must be outside namespace
DOMCI_DATA(CSSMediaRule, css::MediaRule)
namespace mozilla {
namespace css {
DocumentRule::DocumentRule()
{
}
DocumentRule::DocumentRule(const DocumentRule& aCopy)
: GroupRule(aCopy)
, mURLs(new URL(*aCopy.mURLs))
{
}
DocumentRule::~DocumentRule()
{
}
NS_IMPL_ADDREF_INHERITED(DocumentRule, GroupRule)
NS_IMPL_RELEASE_INHERITED(DocumentRule, GroupRule)
// QueryInterface implementation for DocumentRule
NS_INTERFACE_MAP_BEGIN(DocumentRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSGroupingRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSConditionRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSMozDocumentRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSMozDocumentRule)
NS_INTERFACE_MAP_END_INHERITING(GroupRule)
#ifdef DEBUG
/* virtual */ void
DocumentRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
nsAutoCString str;
str.AssignLiteral("@-moz-document ");
for (URL *url = mURLs; url; url = url->next) {
switch (url->func) {
case eURL:
str.AppendLiteral("url(\"");
break;
case eURLPrefix:
str.AppendLiteral("url-prefix(\"");
break;
case eDomain:
str.AppendLiteral("domain(\"");
break;
case eRegExp:
str.AppendLiteral("regexp(\"");
break;
}
nsAutoCString escapedURL(url->url);
escapedURL.ReplaceSubstring("\"", "\\\""); // escape quotes
str.Append(escapedURL);
str.AppendLiteral("\"), ");
}
str.Cut(str.Length() - 2, 1); // remove last ,
fputs(str.get(), out);
GroupRule::List(out, aIndent);
}
#endif
/* virtual */ int32_t
DocumentRule::GetType() const
{
return Rule::DOCUMENT_RULE;
}
/* virtual */ already_AddRefed<Rule>
DocumentRule::Clone() const
{
nsRefPtr<Rule> clone = new DocumentRule(*this);
return clone.forget();
}
// nsIDOMCSSRule methods
NS_IMETHODIMP
DocumentRule::GetType(uint16_t* aType)
{
// XXX What should really happen here?
*aType = nsIDOMCSSRule::UNKNOWN_RULE;
return NS_OK;
}
NS_IMETHODIMP
DocumentRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@-moz-document ");
AppendConditionText(aCssText);
return GroupRule::AppendRulesToCssText(aCssText);
}
NS_IMETHODIMP
DocumentRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
DocumentRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return GroupRule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
DocumentRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return GroupRule::GetParentRule(aParentRule);
}
// nsIDOMCSSGroupingRule methods
NS_IMETHODIMP
DocumentRule::GetCssRules(nsIDOMCSSRuleList* *aRuleList)
{
return GroupRule::GetCssRules(aRuleList);
}
NS_IMETHODIMP
DocumentRule::InsertRule(const nsAString & aRule, uint32_t aIndex, uint32_t* _retval)
{
return GroupRule::InsertRule(aRule, aIndex, _retval);
}
NS_IMETHODIMP
DocumentRule::DeleteRule(uint32_t aIndex)
{
return GroupRule::DeleteRule(aIndex);
}
// nsIDOMCSSConditionRule methods
NS_IMETHODIMP
DocumentRule::GetConditionText(nsAString& aConditionText)
{
aConditionText.Truncate(0);
AppendConditionText(aConditionText);
return NS_OK;
}
NS_IMETHODIMP
DocumentRule::SetConditionText(const nsAString& aConditionText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
// GroupRule interface
/* virtual */ bool
DocumentRule::UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey)
{
nsIDocument *doc = aPresContext->Document();
nsIURI *docURI = doc->GetDocumentURI();
nsAutoCString docURISpec;
if (docURI)
docURI->GetSpec(docURISpec);
for (URL *url = mURLs; url; url = url->next) {
switch (url->func) {
case eURL: {
if (docURISpec == url->url)
return true;
} break;
case eURLPrefix: {
if (StringBeginsWith(docURISpec, url->url))
return true;
} break;
case eDomain: {
nsAutoCString host;
if (docURI)
docURI->GetHost(host);
int32_t lenDiff = host.Length() - url->url.Length();
if (lenDiff == 0) {
if (host == url->url)
return true;
} else {
if (StringEndsWith(host, url->url) &&
host.CharAt(lenDiff - 1) == '.')
return true;
}
} break;
case eRegExp: {
NS_ConvertUTF8toUTF16 spec(docURISpec);
NS_ConvertUTF8toUTF16 regex(url->url);
if (nsContentUtils::IsPatternMatching(spec, regex, doc)) {
return true;
}
} break;
}
}
return false;
}
DocumentRule::URL::~URL()
{
NS_CSS_DELETE_LIST_MEMBER(DocumentRule::URL, this, next);
}
/* virtual */ size_t
DocumentRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
n += GroupRule::SizeOfExcludingThis(aMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mURLs
return n;
}
void
DocumentRule::AppendConditionText(nsAString& aCssText)
{
for (URL *url = mURLs; url; url = url->next) {
switch (url->func) {
case eURL:
aCssText.AppendLiteral("url(");
break;
case eURLPrefix:
aCssText.AppendLiteral("url-prefix(");
break;
case eDomain:
aCssText.AppendLiteral("domain(");
break;
case eRegExp:
aCssText.AppendLiteral("regexp(");
break;
}
nsStyleUtil::AppendEscapedCSSString(NS_ConvertUTF8toUTF16(url->url),
aCssText);
aCssText.AppendLiteral("), ");
}
aCssText.Truncate(aCssText.Length() - 2); // remove last ", "
}
} // namespace css
} // namespace mozilla
// Must be outside namespace
DOMCI_DATA(CSSMozDocumentRule, css::DocumentRule)
// -------------------------------------------
// NameSpaceRule
//
namespace mozilla {
namespace css {
NameSpaceRule::NameSpaceRule(nsIAtom* aPrefix, const nsString& aURLSpec)
: Rule(),
mPrefix(aPrefix),
mURLSpec(aURLSpec)
{
}
NameSpaceRule::NameSpaceRule(const NameSpaceRule& aCopy)
: Rule(aCopy),
mPrefix(aCopy.mPrefix),
mURLSpec(aCopy.mURLSpec)
{
}
NameSpaceRule::~NameSpaceRule()
{
}
NS_IMPL_ADDREF(NameSpaceRule)
NS_IMPL_RELEASE(NameSpaceRule)
// QueryInterface implementation for NameSpaceRule
NS_INTERFACE_MAP_BEGIN(NameSpaceRule)
if (aIID.Equals(NS_GET_IID(css::NameSpaceRule))) {
*aInstancePtr = this;
NS_ADDREF_THIS();
return NS_OK;
}
else
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSNameSpaceRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT(NameSpaceRule, Rule)
#ifdef DEBUG
/* virtual */ void
NameSpaceRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
nsAutoString buffer;
fputs("@namespace ", out);
if (mPrefix) {
mPrefix->ToString(buffer);
fputs(NS_LossyConvertUTF16toASCII(buffer).get(), out);
fputs(" ", out);
}
fputs("url(", out);
fputs(NS_LossyConvertUTF16toASCII(mURLSpec).get(), out);
fputs(")\n", out);
}
#endif
/* virtual */ int32_t
NameSpaceRule::GetType() const
{
return Rule::NAMESPACE_RULE;
}
/* virtual */ already_AddRefed<Rule>
NameSpaceRule::Clone() const
{
nsRefPtr<Rule> clone = new NameSpaceRule(*this);
return clone.forget();
}
NS_IMETHODIMP
NameSpaceRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::NAMESPACE_RULE;
return NS_OK;
}
NS_IMETHODIMP
NameSpaceRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@namespace ");
if (mPrefix) {
aCssText.Append(nsDependentAtomString(mPrefix) + NS_LITERAL_STRING(" "));
}
aCssText.AppendLiteral("url(");
nsStyleUtil::AppendEscapedCSSString(mURLSpec, aCssText);
aCssText.Append(NS_LITERAL_STRING(");"));
return NS_OK;
}
NS_IMETHODIMP
NameSpaceRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
NameSpaceRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return Rule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
NameSpaceRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return Rule::GetParentRule(aParentRule);
}
/* virtual */ size_t
NameSpaceRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mPrefix
// - mURLSpec
}
} // namespace css
} // namespace mozilla
// Must be outside namespace
DOMCI_DATA(CSSNameSpaceRule, css::NameSpaceRule)
// -------------------------------------------
// nsCSSFontFaceStyleDecl and related routines
//
// A src: descriptor is represented as an array value; each entry in
// the array can be eCSSUnit_URL, eCSSUnit_Local_Font, or
// eCSSUnit_Font_Format. Blocks of eCSSUnit_Font_Format may appear
// only after one of the first two. (css3-fonts only contemplates
// annotating URLs with formats, but we handle the general case.)
static void
AppendSerializedFontSrc(const nsCSSValue& src, nsAString & aResult)
{
NS_PRECONDITION(src.GetUnit() == eCSSUnit_Array,
"improper value unit for src:");
const nsCSSValue::Array& sources = *src.GetArrayValue();
size_t i = 0;
while (i < sources.Count()) {
nsAutoString formats;
if (sources[i].GetUnit() == eCSSUnit_URL) {
aResult.AppendLiteral("url(");
nsDependentString url(sources[i].GetOriginalURLValue());
nsStyleUtil::AppendEscapedCSSString(url, aResult);
aResult.AppendLiteral(")");
} else if (sources[i].GetUnit() == eCSSUnit_Local_Font) {
aResult.AppendLiteral("local(");
nsDependentString local(sources[i].GetStringBufferValue());
nsStyleUtil::AppendEscapedCSSString(local, aResult);
aResult.AppendLiteral(")");
} else {
NS_NOTREACHED("entry in src: descriptor with improper unit");
i++;
continue;
}
i++;
formats.Truncate();
while (i < sources.Count() &&
sources[i].GetUnit() == eCSSUnit_Font_Format) {
formats.Append('"');
formats.Append(sources[i].GetStringBufferValue());
formats.AppendLiteral("\", ");
i++;
}
if (formats.Length() > 0) {
formats.Truncate(formats.Length() - 2); // remove the last comma
aResult.AppendLiteral(" format(");
aResult.Append(formats);
aResult.Append(')');
}
aResult.AppendLiteral(", ");
}
aResult.Truncate(aResult.Length() - 2); // remove the last comma-space
}
// print all characters with at least four hex digits
static void
AppendSerializedUnicodePoint(uint32_t aCode, nsACString &aBuf)
{
aBuf.Append(nsPrintfCString("%04X", aCode));
}
// A unicode-range: descriptor is represented as an array of integers,
// to be interpreted as a sequence of pairs: min max min max ...
// It is in source order. (Possibly it should be sorted and overlaps
// consolidated, but right now we don't do that.)
static void
AppendSerializedUnicodeRange(nsCSSValue const & aValue,
nsAString & aResult)
{
NS_PRECONDITION(aValue.GetUnit() == eCSSUnit_Null ||
aValue.GetUnit() == eCSSUnit_Array,
"improper value unit for unicode-range:");
aResult.Truncate();
if (aValue.GetUnit() != eCSSUnit_Array)
return;
nsCSSValue::Array const & sources = *aValue.GetArrayValue();
nsAutoCString buf;
NS_ABORT_IF_FALSE(sources.Count() % 2 == 0,
"odd number of entries in a unicode-range: array");
for (uint32_t i = 0; i < sources.Count(); i += 2) {
uint32_t min = sources[i].GetIntValue();
uint32_t max = sources[i+1].GetIntValue();
// We don't try to replicate the U+XX?? notation.
buf.AppendLiteral("U+");
AppendSerializedUnicodePoint(min, buf);
if (min != max) {
buf.Append('-');
AppendSerializedUnicodePoint(max, buf);
}
buf.AppendLiteral(", ");
}
buf.Truncate(buf.Length() - 2); // remove the last comma-space
CopyASCIItoUTF16(buf, aResult);
}
// Mapping from nsCSSFontDesc codes to nsCSSFontFaceStyleDecl fields.
nsCSSValue nsCSSFontFaceStyleDecl::* const
nsCSSFontFaceStyleDecl::Fields[] = {
#define CSS_FONT_DESC(name_, method_) &nsCSSFontFaceStyleDecl::m##method_,
#include "nsCSSFontDescList.h"
#undef CSS_FONT_DESC
};
// QueryInterface implementation for nsCSSFontFaceStyleDecl
NS_INTERFACE_MAP_BEGIN(nsCSSFontFaceStyleDecl)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSStyleDeclaration)
NS_INTERFACE_MAP_ENTRY(nsICSSDeclaration)
NS_INTERFACE_MAP_ENTRY(nsISupports)
// We forward the cycle collection interfaces to ContainingRule(), which is
// never null (in fact, we're part of that object!)
if (aIID.Equals(NS_GET_IID(nsCycleCollectionISupports)) ||
aIID.Equals(NS_GET_IID(nsXPCOMCycleCollectionParticipant))) {
return ContainingRule()->QueryInterface(aIID, aInstancePtr);
}
else
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF_USING_AGGREGATOR(nsCSSFontFaceStyleDecl, ContainingRule())
NS_IMPL_RELEASE_USING_AGGREGATOR(nsCSSFontFaceStyleDecl, ContainingRule())
// helper for string GetPropertyValue and RemovePropertyValue
nsresult
nsCSSFontFaceStyleDecl::GetPropertyValue(nsCSSFontDesc aFontDescID,
nsAString & aResult) const
{
NS_ENSURE_ARG_RANGE(aFontDescID, eCSSFontDesc_UNKNOWN,
eCSSFontDesc_COUNT - 1);
aResult.Truncate();
if (aFontDescID == eCSSFontDesc_UNKNOWN)
return NS_OK;
const nsCSSValue& val = this->*nsCSSFontFaceStyleDecl::Fields[aFontDescID];
if (val.GetUnit() == eCSSUnit_Null) {
// Avoid having to check no-value in the Family and Src cases below.
return NS_OK;
}
switch (aFontDescID) {
case eCSSFontDesc_Family: {
// we don't use nsCSSValue::AppendToString here because it doesn't
// canonicalize the way we want, and anyway it's overkill when
// we know we have eCSSUnit_String
NS_ASSERTION(val.GetUnit() == eCSSUnit_String, "unexpected unit");
nsDependentString family(val.GetStringBufferValue());
nsStyleUtil::AppendEscapedCSSString(family, aResult);
return NS_OK;
}
case eCSSFontDesc_Style:
val.AppendToString(eCSSProperty_font_style, aResult);
return NS_OK;
case eCSSFontDesc_Weight:
val.AppendToString(eCSSProperty_font_weight, aResult);
return NS_OK;
case eCSSFontDesc_Stretch:
val.AppendToString(eCSSProperty_font_stretch, aResult);
return NS_OK;
case eCSSFontDesc_FontFeatureSettings:
nsStyleUtil::AppendFontFeatureSettings(val, aResult);
return NS_OK;
case eCSSFontDesc_FontLanguageOverride:
val.AppendToString(eCSSProperty_font_language_override, aResult);
return NS_OK;
case eCSSFontDesc_Src:
AppendSerializedFontSrc(val, aResult);
return NS_OK;
case eCSSFontDesc_UnicodeRange:
AppendSerializedUnicodeRange(val, aResult);
return NS_OK;
case eCSSFontDesc_UNKNOWN:
case eCSSFontDesc_COUNT:
;
}
NS_NOTREACHED("nsCSSFontFaceStyleDecl::GetPropertyValue: "
"out-of-range value got to the switch");
return NS_ERROR_INVALID_ARG;
}
// attribute DOMString cssText;
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::GetCssText(nsAString & aCssText)
{
nsAutoString descStr;
aCssText.Truncate();
for (nsCSSFontDesc id = nsCSSFontDesc(eCSSFontDesc_UNKNOWN + 1);
id < eCSSFontDesc_COUNT;
id = nsCSSFontDesc(id + 1)) {
if ((this->*nsCSSFontFaceStyleDecl::Fields[id]).GetUnit()
!= eCSSUnit_Null &&
NS_SUCCEEDED(GetPropertyValue(id, descStr))) {
NS_ASSERTION(descStr.Length() > 0,
"GetCssText: non-null unit, empty property value");
aCssText.AppendLiteral(" ");
aCssText.AppendASCII(nsCSSProps::GetStringValue(id).get());
aCssText.AppendLiteral(": ");
aCssText.Append(descStr);
aCssText.AppendLiteral(";\n");
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::SetCssText(const nsAString & aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED; // bug 443978
}
// DOMString getPropertyValue (in DOMString propertyName);
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::GetPropertyValue(const nsAString & propertyName,
nsAString & aResult)
{
return GetPropertyValue(nsCSSProps::LookupFontDesc(propertyName), aResult);
}
// nsIDOMCSSValue getPropertyCSSValue (in DOMString propertyName);
already_AddRefed<dom::CSSValue>
nsCSSFontFaceStyleDecl::GetPropertyCSSValue(const nsAString & propertyName,
ErrorResult& aRv)
{
// ??? nsDOMCSSDeclaration returns null/NS_OK, but that seems wrong.
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
return nullptr;
}
// DOMString removeProperty (in DOMString propertyName) raises (DOMException);
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::RemoveProperty(const nsAString & propertyName,
nsAString & aResult)
{
nsCSSFontDesc descID = nsCSSProps::LookupFontDesc(propertyName);
NS_ASSERTION(descID >= eCSSFontDesc_UNKNOWN &&
descID < eCSSFontDesc_COUNT,
"LookupFontDesc returned value out of range");
if (descID == eCSSFontDesc_UNKNOWN) {
aResult.Truncate();
} else {
nsresult rv = GetPropertyValue(descID, aResult);
NS_ENSURE_SUCCESS(rv, rv);
(this->*nsCSSFontFaceStyleDecl::Fields[descID]).Reset();
}
return NS_OK;
}
// DOMString getPropertyPriority (in DOMString propertyName);
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::GetPropertyPriority(const nsAString & propertyName,
nsAString & aResult)
{
// font descriptors do not have priorities at present
aResult.Truncate();
return NS_OK;
}
// void setProperty (in DOMString propertyName, in DOMString value,
// in DOMString priority) raises (DOMException);
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::SetProperty(const nsAString & propertyName,
const nsAString & value,
const nsAString & priority)
{
return NS_ERROR_NOT_IMPLEMENTED; // bug 443978
}
// readonly attribute unsigned long length;
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::GetLength(uint32_t *aLength)
{
uint32_t len = 0;
for (nsCSSFontDesc id = nsCSSFontDesc(eCSSFontDesc_UNKNOWN + 1);
id < eCSSFontDesc_COUNT;
id = nsCSSFontDesc(id + 1))
if ((this->*nsCSSFontFaceStyleDecl::Fields[id]).GetUnit() != eCSSUnit_Null)
len++;
*aLength = len;
return NS_OK;
}
// DOMString item (in unsigned long index);
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::Item(uint32_t aIndex, nsAString& aReturn)
{
bool found;
IndexedGetter(aIndex, found, aReturn);
if (!found) {
aReturn.Truncate();
}
return NS_OK;
}
void
nsCSSFontFaceStyleDecl::IndexedGetter(uint32_t index, bool& aFound, nsAString & aResult)
{
int32_t nset = -1;
for (nsCSSFontDesc id = nsCSSFontDesc(eCSSFontDesc_UNKNOWN + 1);
id < eCSSFontDesc_COUNT;
id = nsCSSFontDesc(id + 1)) {
if ((this->*nsCSSFontFaceStyleDecl::Fields[id]).GetUnit()
!= eCSSUnit_Null) {
nset++;
if (nset == int32_t(index)) {
aFound = true;
aResult.AssignASCII(nsCSSProps::GetStringValue(id).get());
return;
}
}
}
aFound = false;
}
// readonly attribute nsIDOMCSSRule parentRule;
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::GetParentRule(nsIDOMCSSRule** aParentRule)
{
NS_IF_ADDREF(*aParentRule = ContainingRule()->GetDOMRule());
return NS_OK;
}
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::GetPropertyValue(const nsCSSProperty aPropID,
nsAString& aValue)
{
return
GetPropertyValue(NS_ConvertUTF8toUTF16(nsCSSProps::GetStringValue(aPropID)),
aValue);
}
NS_IMETHODIMP
nsCSSFontFaceStyleDecl::SetPropertyValue(const nsCSSProperty aPropID,
const nsAString& aValue)
{
return SetProperty(NS_ConvertUTF8toUTF16(nsCSSProps::GetStringValue(aPropID)),
aValue, EmptyString());
}
nsINode*
nsCSSFontFaceStyleDecl::GetParentObject()
{
return ContainingRule()->GetDocument();
}
JSObject*
nsCSSFontFaceStyleDecl::WrapObject(JSContext *cx, JSObject *scope)
{
return mozilla::dom::CSSStyleDeclarationBinding::Wrap(cx, scope, this);
}
// -------------------------------------------
// nsCSSFontFaceRule
//
/* virtual */ already_AddRefed<css::Rule>
nsCSSFontFaceRule::Clone() const
{
nsRefPtr<css::Rule> clone = new nsCSSFontFaceRule(*this);
return clone.forget();
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsCSSFontFaceRule)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsCSSFontFaceRule)
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsCSSFontFaceRule)
// Trace the wrapper for our declaration. This just expands out
// NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER which we can't use
// directly because the wrapper is on the declaration, not on us.
nsContentUtils::TraceWrapper(&tmp->mDecl, aCallback, aClosure);
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsCSSFontFaceRule)
// Unlink the wrapper for our declaraton. This just expands out
// NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER which we can't use
// directly because the wrapper is on the declaration, not on us.
nsContentUtils::ReleaseWrapper(static_cast<nsISupports*>(p), &tmp->mDecl);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsCSSFontFaceRule)
// Just NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS here: that will call
// into our Trace hook, where we do the right thing with declarations
// already.
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
DOMCI_DATA(CSSFontFaceRule, nsCSSFontFaceRule)
// QueryInterface implementation for nsCSSFontFaceRule
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsCSSFontFaceRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSFontFaceRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSFontFaceRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT(nsCSSFontFaceRule, Rule)
#ifdef DEBUG
void
nsCSSFontFaceRule::List(FILE* out, int32_t aIndent) const
{
nsCString baseInd, descInd;
for (int32_t indent = aIndent; --indent >= 0; ) {
baseInd.AppendLiteral(" ");
descInd.AppendLiteral(" ");
}
descInd.AppendLiteral(" ");
nsString descStr;
fprintf(out, "%s@font-face {\n", baseInd.get());
for (nsCSSFontDesc id = nsCSSFontDesc(eCSSFontDesc_UNKNOWN + 1);
id < eCSSFontDesc_COUNT;
id = nsCSSFontDesc(id + 1))
if ((mDecl.*nsCSSFontFaceStyleDecl::Fields[id]).GetUnit()
!= eCSSUnit_Null) {
if (NS_FAILED(mDecl.GetPropertyValue(id, descStr)))
descStr.AssignLiteral("#<serialization error>");
else if (descStr.Length() == 0)
descStr.AssignLiteral("#<serialization missing>");
fprintf(out, "%s%s: %s\n",
descInd.get(), nsCSSProps::GetStringValue(id).get(),
NS_ConvertUTF16toUTF8(descStr).get());
}
fprintf(out, "%s}\n", baseInd.get());
}
#endif
/* virtual */ int32_t
nsCSSFontFaceRule::GetType() const
{
return Rule::FONT_FACE_RULE;
}
NS_IMETHODIMP
nsCSSFontFaceRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::FONT_FACE_RULE;
return NS_OK;
}
NS_IMETHODIMP
nsCSSFontFaceRule::GetCssText(nsAString& aCssText)
{
nsAutoString propText;
mDecl.GetCssText(propText);
aCssText.AssignLiteral("@font-face {\n");
aCssText.Append(propText);
aCssText.Append('}');
return NS_OK;
}
NS_IMETHODIMP
nsCSSFontFaceRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED; // bug 443978
}
NS_IMETHODIMP
nsCSSFontFaceRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return Rule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
nsCSSFontFaceRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return Rule::GetParentRule(aParentRule);
}
NS_IMETHODIMP
nsCSSFontFaceRule::GetStyle(nsIDOMCSSStyleDeclaration** aStyle)
{
NS_IF_ADDREF(*aStyle = &mDecl);
return NS_OK;
}
// Arguably these should forward to nsCSSFontFaceStyleDecl methods.
void
nsCSSFontFaceRule::SetDesc(nsCSSFontDesc aDescID, nsCSSValue const & aValue)
{
NS_PRECONDITION(aDescID > eCSSFontDesc_UNKNOWN &&
aDescID < eCSSFontDesc_COUNT,
"aDescID out of range in nsCSSFontFaceRule::SetDesc");
// FIXME: handle dynamic changes
mDecl.*nsCSSFontFaceStyleDecl::Fields[aDescID] = aValue;
}
void
nsCSSFontFaceRule::GetDesc(nsCSSFontDesc aDescID, nsCSSValue & aValue)
{
NS_PRECONDITION(aDescID > eCSSFontDesc_UNKNOWN &&
aDescID < eCSSFontDesc_COUNT,
"aDescID out of range in nsCSSFontFaceRule::GetDesc");
aValue = mDecl.*nsCSSFontFaceStyleDecl::Fields[aDescID];
}
/* virtual */ size_t
nsCSSFontFaceRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mDecl
}
// -------------------------------------------
// nsCSSKeyframeStyleDeclaration
//
nsCSSKeyframeStyleDeclaration::nsCSSKeyframeStyleDeclaration(nsCSSKeyframeRule *aRule)
: mRule(aRule)
{
}
nsCSSKeyframeStyleDeclaration::~nsCSSKeyframeStyleDeclaration()
{
NS_ASSERTION(!mRule, "DropReference not called.");
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsCSSKeyframeStyleDeclaration)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsCSSKeyframeStyleDeclaration)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsCSSKeyframeStyleDeclaration)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsCSSKeyframeStyleDeclaration)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_END_INHERITING(nsDOMCSSDeclaration)
css::Declaration*
nsCSSKeyframeStyleDeclaration::GetCSSDeclaration(bool aAllocate)
{
if (mRule) {
return mRule->Declaration();
} else {
return nullptr;
}
}
void
nsCSSKeyframeStyleDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv)
{
GetCSSParsingEnvironmentForRule(mRule, aCSSParseEnv);
}
NS_IMETHODIMP
nsCSSKeyframeStyleDeclaration::GetParentRule(nsIDOMCSSRule **aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
NS_IF_ADDREF(*aParent = mRule);
return NS_OK;
}
nsresult
nsCSSKeyframeStyleDeclaration::SetCSSDeclaration(css::Declaration* aDecl)
{
NS_ABORT_IF_FALSE(aDecl, "must be non-null");
mRule->ChangeDeclaration(aDecl);
return NS_OK;
}
nsIDocument*
nsCSSKeyframeStyleDeclaration::DocToUpdate()
{
return nullptr;
}
nsINode*
nsCSSKeyframeStyleDeclaration::GetParentObject()
{
return mRule ? mRule->GetDocument() : nullptr;
}
// -------------------------------------------
// nsCSSKeyframeRule
//
nsCSSKeyframeRule::nsCSSKeyframeRule(const nsCSSKeyframeRule& aCopy)
// copy everything except our reference count and mDOMDeclaration
: Rule(aCopy)
, mKeys(aCopy.mKeys)
, mDeclaration(new css::Declaration(*aCopy.mDeclaration))
{
}
nsCSSKeyframeRule::~nsCSSKeyframeRule()
{
if (mDOMDeclaration) {
mDOMDeclaration->DropReference();
}
}
/* virtual */ already_AddRefed<css::Rule>
nsCSSKeyframeRule::Clone() const
{
nsRefPtr<css::Rule> clone = new nsCSSKeyframeRule(*this);
return clone.forget();
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsCSSKeyframeRule)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsCSSKeyframeRule)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsCSSKeyframeRule)
if (tmp->mDOMDeclaration) {
tmp->mDOMDeclaration->DropReference();
ImplCycleCollectionUnlink(tmp->mDOMDeclaration);
}
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsCSSKeyframeRule)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDOMDeclaration)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
DOMCI_DATA(MozCSSKeyframeRule, nsCSSKeyframeRule)
// QueryInterface implementation for nsCSSKeyframeRule
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsCSSKeyframeRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMMozCSSKeyframeRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(MozCSSKeyframeRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT_GET_DOM_RULE_WEAK(nsCSSKeyframeRule, Rule)
/* virtual */ void
nsCSSKeyframeRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
// We need to implement MapRuleInfoInto because the animation manager
// constructs a rule node pointing to us in order to compute the
// styles it needs to animate.
// The spec says that !important declarations should just be ignored
NS_ASSERTION(!mDeclaration->HasImportantData(),
"Keyframe rules has !important data");
mDeclaration->MapNormalRuleInfoInto(aRuleData);
}
#ifdef DEBUG
void
nsCSSKeyframeRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
nsAutoString tmp;
DoGetKeyText(tmp);
fputs(NS_ConvertUTF16toUTF8(tmp).get(), out);
fputs(" ", out);
mDeclaration->List(out, aIndent);
fputs("\n", out);
}
#endif
/* virtual */ int32_t
nsCSSKeyframeRule::GetType() const
{
return Rule::KEYFRAME_RULE;
}
NS_IMETHODIMP
nsCSSKeyframeRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::KEYFRAME_RULE;
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframeRule::GetCssText(nsAString& aCssText)
{
DoGetKeyText(aCssText);
aCssText.AppendLiteral(" { ");
nsAutoString tmp;
mDeclaration->ToString(tmp);
aCssText.Append(tmp);
aCssText.AppendLiteral(" }");
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframeRule::SetCssText(const nsAString& aCssText)
{
// FIXME: implement???
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsCSSKeyframeRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return Rule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
nsCSSKeyframeRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return Rule::GetParentRule(aParentRule);
}
NS_IMETHODIMP
nsCSSKeyframeRule::GetKeyText(nsAString& aKeyText)
{
DoGetKeyText(aKeyText);
return NS_OK;
}
void
nsCSSKeyframeRule::DoGetKeyText(nsAString& aKeyText) const
{
aKeyText.Truncate();
uint32_t i = 0, i_end = mKeys.Length();
NS_ABORT_IF_FALSE(i_end != 0, "must have some keys");
for (;;) {
aKeyText.AppendFloat(mKeys[i] * 100.0f);
aKeyText.Append(PRUnichar('%'));
if (++i == i_end) {
break;
}
aKeyText.AppendLiteral(", ");
}
}
NS_IMETHODIMP
nsCSSKeyframeRule::SetKeyText(const nsAString& aKeyText)
{
nsCSSParser parser;
InfallibleTArray<float> newSelectors;
// FIXME: pass filename and line number
if (parser.ParseKeyframeSelectorString(aKeyText, nullptr, 0, newSelectors)) {
newSelectors.SwapElements(mKeys);
} else {
// for now, we don't do anything if the parse fails
}
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
if (sheet) {
sheet->SetModifiedByChildRule();
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframeRule::GetStyle(nsIDOMCSSStyleDeclaration** aStyle)
{
if (!mDOMDeclaration) {
mDOMDeclaration = new nsCSSKeyframeStyleDeclaration(this);
}
NS_ADDREF(*aStyle = mDOMDeclaration);
return NS_OK;
}
void
nsCSSKeyframeRule::ChangeDeclaration(css::Declaration* aDeclaration)
{
// Be careful to not assign to an nsAutoPtr if we would be assigning
// the thing it already holds.
if (aDeclaration != mDeclaration) {
mDeclaration = aDeclaration;
}
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
if (sheet) {
sheet->SetModifiedByChildRule();
}
}
/* virtual */ size_t
nsCSSKeyframeRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mKeys
// - mDeclaration
// - mDOMDeclaration
}
// -------------------------------------------
// nsCSSKeyframesRule
//
nsCSSKeyframesRule::nsCSSKeyframesRule(const nsCSSKeyframesRule& aCopy)
// copy everything except our reference count. GroupRule's copy
// constructor also doesn't copy the lazily-constructed
// mRuleCollection.
: GroupRule(aCopy),
mName(aCopy.mName)
{
}
nsCSSKeyframesRule::~nsCSSKeyframesRule()
{
}
/* virtual */ already_AddRefed<css::Rule>
nsCSSKeyframesRule::Clone() const
{
nsRefPtr<css::Rule> clone = new nsCSSKeyframesRule(*this);
return clone.forget();
}
NS_IMPL_ADDREF_INHERITED(nsCSSKeyframesRule, css::GroupRule)
NS_IMPL_RELEASE_INHERITED(nsCSSKeyframesRule, css::GroupRule)
DOMCI_DATA(MozCSSKeyframesRule, nsCSSKeyframesRule)
// QueryInterface implementation for nsCSSKeyframesRule
NS_INTERFACE_MAP_BEGIN(nsCSSKeyframesRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMMozCSSKeyframesRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(MozCSSKeyframesRule)
NS_INTERFACE_MAP_END_INHERITING(GroupRule)
#ifdef DEBUG
void
nsCSSKeyframesRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
fprintf(out, "@keyframes %s", NS_ConvertUTF16toUTF8(mName).get());
GroupRule::List(out, aIndent);
}
#endif
/* virtual */ int32_t
nsCSSKeyframesRule::GetType() const
{
return Rule::KEYFRAMES_RULE;
}
NS_IMETHODIMP
nsCSSKeyframesRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::KEYFRAMES_RULE;
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframesRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@keyframes ");
aCssText.Append(mName);
aCssText.AppendLiteral(" {\n");
nsAutoString tmp;
for (uint32_t i = 0, i_end = mRules.Count(); i != i_end; ++i) {
static_cast<nsCSSKeyframeRule*>(mRules[i])->GetCssText(tmp);
aCssText.Append(tmp);
aCssText.AppendLiteral("\n");
}
aCssText.AppendLiteral("}");
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframesRule::SetCssText(const nsAString& aCssText)
{
// FIXME: implement???
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsCSSKeyframesRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return GroupRule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
nsCSSKeyframesRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return GroupRule::GetParentRule(aParentRule);
}
NS_IMETHODIMP
nsCSSKeyframesRule::GetName(nsAString& aName)
{
aName = mName;
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframesRule::SetName(const nsAString& aName)
{
mName = aName;
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
if (sheet) {
sheet->SetModifiedByChildRule();
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframesRule::GetCssRules(nsIDOMCSSRuleList* *aRuleList)
{
return GroupRule::GetCssRules(aRuleList);
}
NS_IMETHODIMP
nsCSSKeyframesRule::AppendRule(const nsAString& aRule)
{
// The spec is confusing, and I think we should just append the rule,
// which also turns out to match WebKit:
// http://lists.w3.org/Archives/Public/www-style/2011Apr/0034.html
nsCSSParser parser;
// FIXME: pass filename and line number
nsRefPtr<nsCSSKeyframeRule> rule =
parser.ParseKeyframeRule(aRule, nullptr, 0);
if (rule) {
AppendStyleRule(rule);
}
return NS_OK;
}
static const uint32_t RULE_NOT_FOUND = uint32_t(-1);
uint32_t
nsCSSKeyframesRule::FindRuleIndexForKey(const nsAString& aKey)
{
nsCSSParser parser;
InfallibleTArray<float> keys;
// FIXME: pass filename and line number
if (parser.ParseKeyframeSelectorString(aKey, nullptr, 0, keys)) {
// The spec isn't clear, but we'll match on the key list, which
// mostly matches what WebKit does, except we'll do last-match
// instead of first-match, and handling parsing differences better.
// http://lists.w3.org/Archives/Public/www-style/2011Apr/0036.html
// http://lists.w3.org/Archives/Public/www-style/2011Apr/0037.html
for (uint32_t i = mRules.Count(); i-- != 0; ) {
if (static_cast<nsCSSKeyframeRule*>(mRules[i])->GetKeys() == keys) {
return i;
}
}
}
return RULE_NOT_FOUND;
}
NS_IMETHODIMP
nsCSSKeyframesRule::DeleteRule(const nsAString& aKey)
{
uint32_t index = FindRuleIndexForKey(aKey);
if (index != RULE_NOT_FOUND) {
mRules.RemoveObjectAt(index);
Bug 760331: Coalesce data for inline style across nodes. r=bz This patch enables sharing of an nsAttrValue's MiscContainer between nodes for style rules. MiscContainers of type eCSSStyleRule are now refcounted (with some clever struct packing to ensure that the amount of memory allocated for MiscContainer remains unchanged on 32 and 64 bit). This infrastructure can be used to share most MiscContainer types in the future if we find advantages to sharing other types than just eCSSStyleRuley. A cache mapping strings to MiscContainers has been added to nsHTMLCSSStyleSheet. MiscContainers can be shared between nsAttrValues when one nsAttrValue is SetTo another nsAttrValue or when there is a cache hit in this cache. This patch also adds the ability to tell a style rule that it belongs to an nsHTMLCSSStyleSheet, with appropriate accessor functions to separate that from the existing case of belonging to an nsCSSStyleSheet. The primary use case is to reduce memory use for pages that have lots of inline style attributes with the same value. This can happen easily with large pages that are automatically generated. An (admittedly pathological) testcase in Bug 686975 sees over 250 MB of memory savings with this change. Reusing the same MiscContainer for multiple nodes saves the overhead of maintaining separate copies of the string containing the serialized value of the style attribute and of creating separate style rules for each node. Eliminating duplicate style rules enables further savings in layout through style context sharing. The testcase sees the amount of memory used by style contexts go from over 250 MB to 10 KB. Because the cache is based on the text value of the style attribute, it will not handle attributes that have different text values but are parsed into identical style rules. We also do not attempt to share MiscContainers when the node's base URI differs from the document URI. The effect of these limitations is expected to be low.
2012-09-30 09:40:24 -07:00
nsCSSStyleSheet* sheet = GetStyleSheet();
if (sheet) {
sheet->SetModifiedByChildRule();
}
}
return NS_OK;
}
NS_IMETHODIMP
nsCSSKeyframesRule::FindRule(const nsAString& aKey,
nsIDOMMozCSSKeyframeRule** aResult)
{
uint32_t index = FindRuleIndexForKey(aKey);
if (index == RULE_NOT_FOUND) {
*aResult = nullptr;
} else {
NS_ADDREF(*aResult = static_cast<nsCSSKeyframeRule*>(mRules[index]));
}
return NS_OK;
}
// GroupRule interface
/* virtual */ bool
nsCSSKeyframesRule::UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey)
{
NS_ABORT_IF_FALSE(false, "should not be called");
return false;
}
/* virtual */ size_t
nsCSSKeyframesRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
n += GroupRule::SizeOfExcludingThis(aMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mName
return n;
}
// -------------------------------------------
// nsCSSPageStyleDeclaration
//
nsCSSPageStyleDeclaration::nsCSSPageStyleDeclaration(nsCSSPageRule* aRule)
: mRule(aRule)
{
}
nsCSSPageStyleDeclaration::~nsCSSPageStyleDeclaration()
{
NS_ASSERTION(!mRule, "DropReference not called.");
}
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsCSSPageStyleDeclaration)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsCSSPageStyleDeclaration)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(nsCSSPageStyleDeclaration)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsCSSPageStyleDeclaration)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_END_INHERITING(nsDOMCSSDeclaration)
css::Declaration*
nsCSSPageStyleDeclaration::GetCSSDeclaration(bool aAllocate)
{
if (mRule) {
return mRule->Declaration();
} else {
return nullptr;
}
}
void
nsCSSPageStyleDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv)
{
GetCSSParsingEnvironmentForRule(mRule, aCSSParseEnv);
}
NS_IMETHODIMP
nsCSSPageStyleDeclaration::GetParentRule(nsIDOMCSSRule** aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
NS_IF_ADDREF(*aParent = mRule);
return NS_OK;
}
nsresult
nsCSSPageStyleDeclaration::SetCSSDeclaration(css::Declaration* aDecl)
{
NS_ABORT_IF_FALSE(aDecl, "must be non-null");
mRule->ChangeDeclaration(aDecl);
return NS_OK;
}
nsIDocument*
nsCSSPageStyleDeclaration::DocToUpdate()
{
return nullptr;
}
nsINode*
nsCSSPageStyleDeclaration::GetParentObject()
{
return mRule ? mRule->GetDocument() : nullptr;
}
// -------------------------------------------
// nsCSSPageRule
//
nsCSSPageRule::nsCSSPageRule(const nsCSSPageRule& aCopy)
// copy everything except our reference count and mDOMDeclaration
: Rule(aCopy)
, mDeclaration(new css::Declaration(*aCopy.mDeclaration))
{
}
nsCSSPageRule::~nsCSSPageRule()
{
if (mDOMDeclaration) {
mDOMDeclaration->DropReference();
}
}
/* virtual */ already_AddRefed<css::Rule>
nsCSSPageRule::Clone() const
{
nsRefPtr<css::Rule> clone = new nsCSSPageRule(*this);
return clone.forget();
}
NS_IMPL_ADDREF(nsCSSPageRule)
NS_IMPL_RELEASE(nsCSSPageRule)
DOMCI_DATA(CSSPageRule, nsCSSPageRule)
// QueryInterface implementation for nsCSSPageRule
NS_INTERFACE_MAP_BEGIN(nsCSSPageRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSPageRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSPageRule)
NS_INTERFACE_MAP_END
IMPL_STYLE_RULE_INHERIT_GET_DOM_RULE_WEAK(nsCSSPageRule, Rule)
#ifdef DEBUG
void
nsCSSPageRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("@page ", out);
mDeclaration->List(out, aIndent);
fputs("\n", out);
}
#endif
/* virtual */ int32_t
nsCSSPageRule::GetType() const
{
return Rule::PAGE_RULE;
}
NS_IMETHODIMP
nsCSSPageRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::PAGE_RULE;
return NS_OK;
}
NS_IMETHODIMP
nsCSSPageRule::GetCssText(nsAString& aCssText)
{
aCssText.AppendLiteral("@page { ");
nsAutoString tmp;
mDeclaration->ToString(tmp);
aCssText.Append(tmp);
aCssText.AppendLiteral(" }");
return NS_OK;
}
NS_IMETHODIMP
nsCSSPageRule::SetCssText(const nsAString& aCssText)
{
// FIXME: implement???
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsCSSPageRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return Rule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
nsCSSPageRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return Rule::GetParentRule(aParentRule);
}
css::ImportantRule*
nsCSSPageRule::GetImportantRule()
{
if (!mDeclaration->HasImportantData()) {
return nullptr;
}
if (!mImportantRule) {
mImportantRule = new css::ImportantRule(mDeclaration);
}
return mImportantRule;
}
/* virtual */ void
nsCSSPageRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
mDeclaration->MapNormalRuleInfoInto(aRuleData);
}
NS_IMETHODIMP
nsCSSPageRule::GetStyle(nsIDOMCSSStyleDeclaration** aStyle)
{
if (!mDOMDeclaration) {
mDOMDeclaration = new nsCSSPageStyleDeclaration(this);
}
NS_ADDREF(*aStyle = mDOMDeclaration);
return NS_OK;
}
void
nsCSSPageRule::ChangeDeclaration(css::Declaration* aDeclaration)
{
mImportantRule = nullptr;
// Be careful to not assign to an nsAutoPtr if we would be assigning
// the thing it already holds.
if (aDeclaration != mDeclaration) {
mDeclaration = aDeclaration;
}
nsCSSStyleSheet* sheet = GetStyleSheet();
if (sheet) {
sheet->SetModifiedByChildRule();
}
}
/* virtual */ size_t
nsCSSPageRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
return aMallocSizeOf(this);
}
namespace mozilla {
CSSSupportsRule::CSSSupportsRule(bool aConditionMet,
const nsString& aCondition)
: mUseGroup(aConditionMet),
mCondition(aCondition)
{
}
CSSSupportsRule::CSSSupportsRule(const CSSSupportsRule& aCopy)
: css::GroupRule(aCopy),
mUseGroup(aCopy.mUseGroup),
mCondition(aCopy.mCondition)
{
}
#ifdef DEBUG
/* virtual */ void
CSSSupportsRule::List(FILE* out, int32_t aIndent) const
{
for (int32_t indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("@supports ", out);
fputs(NS_ConvertUTF16toUTF8(mCondition).get(), out);
css::GroupRule::List(out, aIndent);
}
#endif
/* virtual */ int32_t
CSSSupportsRule::GetType() const
{
return Rule::SUPPORTS_RULE;
}
/* virtual */ already_AddRefed<mozilla::css::Rule>
CSSSupportsRule::Clone() const
{
nsRefPtr<css::Rule> clone = new CSSSupportsRule(*this);
return clone.forget();
}
/* virtual */ bool
CSSSupportsRule::UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey)
{
return mUseGroup;
}
NS_IMPL_ADDREF_INHERITED(CSSSupportsRule, css::GroupRule)
NS_IMPL_RELEASE_INHERITED(CSSSupportsRule, css::GroupRule)
// QueryInterface implementation for CSSSupportsRule
NS_INTERFACE_MAP_BEGIN(CSSSupportsRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSGroupingRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSConditionRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSSupportsRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIStyleRule)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSSupportsRule)
NS_INTERFACE_MAP_END_INHERITING(GroupRule)
// nsIDOMCSSRule methods
NS_IMETHODIMP
CSSSupportsRule::GetType(uint16_t* aType)
{
*aType = nsIDOMCSSRule::SUPPORTS_RULE;
return NS_OK;
}
NS_IMETHODIMP
CSSSupportsRule::GetCssText(nsAString& aCssText)
{
aCssText.AssignLiteral("@supports ");
aCssText.Append(mCondition);
return css::GroupRule::AppendRulesToCssText(aCssText);
}
NS_IMETHODIMP
CSSSupportsRule::SetCssText(const nsAString& aCssText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
CSSSupportsRule::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
return css::GroupRule::GetParentStyleSheet(aSheet);
}
NS_IMETHODIMP
CSSSupportsRule::GetParentRule(nsIDOMCSSRule** aParentRule)
{
return css::GroupRule::GetParentRule(aParentRule);
}
// nsIDOMCSSGroupingRule methods
NS_IMETHODIMP
CSSSupportsRule::GetCssRules(nsIDOMCSSRuleList* *aRuleList)
{
return css::GroupRule::GetCssRules(aRuleList);
}
NS_IMETHODIMP
CSSSupportsRule::InsertRule(const nsAString & aRule, uint32_t aIndex, uint32_t* _retval)
{
return css::GroupRule::InsertRule(aRule, aIndex, _retval);
}
NS_IMETHODIMP
CSSSupportsRule::DeleteRule(uint32_t aIndex)
{
return css::GroupRule::DeleteRule(aIndex);
}
// nsIDOMCSSConditionRule methods
NS_IMETHODIMP
CSSSupportsRule::GetConditionText(nsAString& aConditionText)
{
aConditionText.Assign(mCondition);
return NS_OK;
}
NS_IMETHODIMP
CSSSupportsRule::SetConditionText(const nsAString& aConditionText)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
/* virtual */ size_t
CSSSupportsRule::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
{
size_t n = aMallocSizeOf(this);
n += css::GroupRule::SizeOfExcludingThis(aMallocSizeOf);
n += mCondition.SizeOfExcludingThisIfUnshared(aMallocSizeOf);
return n;
}
} // namespace mozilla
// Must be outside namespace
DOMCI_DATA(CSSSupportsRule, mozilla::CSSSupportsRule)