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gecko-dev/layout/style/nsCSSStyleRule.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* David Hyatt <hyatt@netscape.com>
* Daniel Glazman <glazman@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* representation of CSS style rules (selectors+declaration), CSS
* selectors, and DOM objects for style rules, selectors, and
* declarations
*/
#include "nsCOMPtr.h"
#include "nsCSSRule.h"
#include "nsICSSStyleRule.h"
#include "nsICSSGroupRule.h"
#include "nsCSSDeclaration.h"
#include "nsICSSStyleSheet.h"
#include "nsICSSParser.h"
#include "nsICSSLoader.h"
#include "nsIURL.h"
#include "nsPresContext.h"
#include "nsIDocument.h"
#include "nsIDeviceContext.h"
#include "nsIAtom.h"
#include "nsCRT.h"
#include "nsString.h"
#include "nsStyleConsts.h"
#include "nsStyleUtil.h"
#include "nsUnitConversion.h"
#include "nsIFontMetrics.h"
#include "nsIDOMCSSStyleSheet.h"
#include "nsICSSStyleRuleDOMWrapper.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsDOMCSSDeclaration.h"
#include "nsINameSpaceManager.h"
#include "nsXMLNameSpaceMap.h"
#include "nsILookAndFeel.h"
#include "nsRuleNode.h"
#include "nsUnicharUtils.h"
#include "nsCSSPseudoElements.h"
#include "nsIPrincipal.h"
#include "nsComponentManagerUtils.h"
#include "nsContentUtils.h"
#include "nsContentErrors.h"
#define NS_IF_CLONE(member_) \
PR_BEGIN_MACRO \
if (member_) { \
result->member_ = member_->Clone(); \
if (!result->member_) { \
delete result; \
return nsnull; \
} \
} \
PR_END_MACRO
#define NS_IF_DEEP_CLONE(type_, member_, args_) \
PR_BEGIN_MACRO \
type_ *dest = result; \
for (type_ *src = member_; src; src = src->member_) { \
type_ *clone = src->Clone args_; \
if (!clone) { \
delete result; \
return nsnull; \
} \
dest->member_ = clone; \
dest = clone; \
} \
PR_END_MACRO
#define NS_IF_DELETE(ptr) \
PR_BEGIN_MACRO \
if (ptr) { \
delete ptr; \
ptr = nsnull; \
} \
PR_END_MACRO
#define NS_IF_DEEP_DELETE(type_, member_) \
PR_BEGIN_MACRO \
type_ *cur = member_; \
member_ = nsnull; \
while (cur) { \
type_ *next = cur->member_; \
cur->member_ = nsnull; \
delete cur; \
cur = next; \
} \
PR_END_MACRO
/* ************************************************************************** */
nsAtomList::nsAtomList(nsIAtom* aAtom)
: mAtom(aAtom),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAtomList);
}
nsAtomList::nsAtomList(const nsString& aAtomValue)
: mAtom(nsnull),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAtomList);
mAtom = do_GetAtom(aAtomValue);
}
nsAtomList*
nsAtomList::Clone(PRBool aDeep) const
{
nsAtomList *result = new nsAtomList(mAtom);
if (!result)
return nsnull;
if (aDeep)
NS_IF_DEEP_CLONE(nsAtomList, mNext, (PR_FALSE));
return result;
}
nsAtomList::~nsAtomList(void)
{
MOZ_COUNT_DTOR(nsAtomList);
NS_IF_DEEP_DELETE(nsAtomList, mNext);
}
nsAtomStringList::nsAtomStringList(nsIAtom* aAtom, const PRUnichar* aString)
: mAtom(aAtom),
mString(nsnull),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAtomStringList);
if (aString)
mString = NS_strdup(aString);
}
nsAtomStringList::nsAtomStringList(const nsString& aAtomValue,
const PRUnichar* aString)
: mAtom(nsnull),
mString(nsnull),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAtomStringList);
mAtom = do_GetAtom(aAtomValue);
if (aString)
mString = NS_strdup(aString);
}
nsAtomStringList*
nsAtomStringList::Clone(PRBool aDeep) const
{
nsAtomStringList *result = new nsAtomStringList(mAtom, mString);
if (aDeep)
NS_IF_DEEP_CLONE(nsAtomStringList, mNext, (PR_FALSE));
return result;
}
nsAtomStringList::~nsAtomStringList(void)
{
MOZ_COUNT_DTOR(nsAtomStringList);
if (mString)
NS_Free(mString);
NS_IF_DEEP_DELETE(nsAtomStringList, mNext);
}
nsAttrSelector::nsAttrSelector(PRInt32 aNameSpace, const nsString& aAttr)
: mNameSpace(aNameSpace),
mAttr(nsnull),
mFunction(NS_ATTR_FUNC_SET),
mCaseSensitive(1),
mValue(),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAttrSelector);
mAttr = do_GetAtom(aAttr);
}
nsAttrSelector::nsAttrSelector(PRInt32 aNameSpace, const nsString& aAttr, PRUint8 aFunction,
const nsString& aValue, PRBool aCaseSensitive)
: mNameSpace(aNameSpace),
mAttr(nsnull),
mFunction(aFunction),
mCaseSensitive(aCaseSensitive),
mValue(aValue),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAttrSelector);
mAttr = do_GetAtom(aAttr);
}
nsAttrSelector::nsAttrSelector(PRInt32 aNameSpace, nsIAtom* aAttr,
PRUint8 aFunction, const nsString& aValue,
PRBool aCaseSensitive)
: mNameSpace(aNameSpace),
mAttr(aAttr),
mFunction(aFunction),
mCaseSensitive(aCaseSensitive),
mValue(aValue),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsAttrSelector);
}
nsAttrSelector*
nsAttrSelector::Clone(PRBool aDeep) const
{
nsAttrSelector *result =
new nsAttrSelector(mNameSpace, mAttr, mFunction, mValue, mCaseSensitive);
if (aDeep)
NS_IF_DEEP_CLONE(nsAttrSelector, mNext, (PR_FALSE));
return result;
}
nsAttrSelector::~nsAttrSelector(void)
{
MOZ_COUNT_DTOR(nsAttrSelector);
NS_IF_DEEP_DELETE(nsAttrSelector, mNext);
}
// -- nsCSSSelector -------------------------------
nsCSSSelector::nsCSSSelector(void)
: mNameSpace(kNameSpaceID_Unknown), mTag(nsnull),
mIDList(nsnull),
mClassList(nsnull),
mPseudoClassList(nsnull),
mAttrList(nsnull),
mOperator(0),
mNegations(nsnull),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsCSSSelector);
}
nsCSSSelector*
nsCSSSelector::Clone(PRBool aDeepNext, PRBool aDeepNegations) const
{
nsCSSSelector *result = new nsCSSSelector();
if (!result)
return nsnull;
result->mNameSpace = mNameSpace;
result->mTag = mTag;
NS_IF_CLONE(mIDList);
NS_IF_CLONE(mClassList);
NS_IF_CLONE(mPseudoClassList);
NS_IF_CLONE(mAttrList);
// No need to worry about multiple levels of recursion since an
// mNegations can't have an mNext.
if (aDeepNegations) {
NS_IF_DEEP_CLONE(nsCSSSelector, mNegations, (PR_TRUE, PR_FALSE));
}
if (aDeepNext) {
NS_IF_DEEP_CLONE(nsCSSSelector, mNext, (PR_FALSE, PR_TRUE));
}
return result;
}
nsCSSSelector::~nsCSSSelector(void)
{
MOZ_COUNT_DTOR(nsCSSSelector);
Reset();
// No need to worry about multiple levels of recursion since an
// mNegations can't have an mNext.
NS_IF_DEEP_DELETE(nsCSSSelector, mNext);
}
void nsCSSSelector::Reset(void)
{
mNameSpace = kNameSpaceID_Unknown;
mTag = nsnull;
NS_IF_DELETE(mIDList);
NS_IF_DELETE(mClassList);
NS_IF_DELETE(mPseudoClassList);
NS_IF_DELETE(mAttrList);
// No need to worry about multiple levels of recursion since an
// mNegations can't have an mNext.
NS_IF_DEEP_DELETE(nsCSSSelector, mNegations);
mOperator = PRUnichar(0);
}
void nsCSSSelector::SetNameSpace(PRInt32 aNameSpace)
{
mNameSpace = aNameSpace;
}
void nsCSSSelector::SetTag(const nsString& aTag)
{
if (aTag.IsEmpty())
mTag = nsnull;
else
mTag = do_GetAtom(aTag);
}
void nsCSSSelector::AddID(const nsString& aID)
{
if (!aID.IsEmpty()) {
nsAtomList** list = &mIDList;
while (nsnull != *list) {
list = &((*list)->mNext);
}
*list = new nsAtomList(aID);
}
}
void nsCSSSelector::AddClass(const nsString& aClass)
{
if (!aClass.IsEmpty()) {
nsAtomList** list = &mClassList;
while (nsnull != *list) {
list = &((*list)->mNext);
}
*list = new nsAtomList(aClass);
}
}
void nsCSSSelector::AddPseudoClass(const nsString& aPseudoClass,
const PRUnichar* aString)
{
if (!aPseudoClass.IsEmpty()) {
nsAtomStringList** list = &mPseudoClassList;
while (nsnull != *list) {
list = &((*list)->mNext);
}
*list = new nsAtomStringList(aPseudoClass, aString);
}
}
void nsCSSSelector::AddPseudoClass(nsIAtom* aPseudoClass,
const PRUnichar* aString)
{
if (nsnull != aPseudoClass) {
nsAtomStringList** list = &mPseudoClassList;
while (nsnull != *list) {
list = &((*list)->mNext);
}
*list = new nsAtomStringList(aPseudoClass, aString);
}
}
void nsCSSSelector::AddAttribute(PRInt32 aNameSpace, const nsString& aAttr)
{
if (!aAttr.IsEmpty()) {
nsAttrSelector** list = &mAttrList;
while (nsnull != *list) {
list = &((*list)->mNext);
}
*list = new nsAttrSelector(aNameSpace, aAttr);
}
}
void nsCSSSelector::AddAttribute(PRInt32 aNameSpace, const nsString& aAttr, PRUint8 aFunc,
const nsString& aValue, PRBool aCaseSensitive)
{
if (!aAttr.IsEmpty()) {
nsAttrSelector** list = &mAttrList;
while (nsnull != *list) {
list = &((*list)->mNext);
}
*list = new nsAttrSelector(aNameSpace, aAttr, aFunc, aValue, aCaseSensitive);
}
}
void nsCSSSelector::SetOperator(PRUnichar aOperator)
{
mOperator = aOperator;
}
PRInt32 nsCSSSelector::CalcWeight(void) const
{
PRInt32 weight = 0;
if (nsnull != mTag) {
weight += 0x000001;
}
nsAtomList* list = mIDList;
while (nsnull != list) {
weight += 0x010000;
list = list->mNext;
}
list = mClassList;
while (nsnull != list) {
weight += 0x000100;
list = list->mNext;
}
nsAtomStringList *plist = mPseudoClassList;
while (nsnull != plist) {
weight += 0x000100;
plist = plist->mNext;
}
nsAttrSelector* attr = mAttrList;
while (nsnull != attr) {
weight += 0x000100;
attr = attr->mNext;
}
if (nsnull != mNegations) {
weight += mNegations->CalcWeight();
}
return weight;
}
// pseudo-elements are stored in the selectors' chain using fictional elements;
// these fictional elements have mTag starting with a colon
static PRBool IsPseudoElement(nsIAtom* aAtom)
{
if (aAtom) {
const char* str;
aAtom->GetUTF8String(&str);
return str && (*str == ':');
}
return PR_FALSE;
}
void nsCSSSelector::AppendNegationToString(nsAString& aString)
{
aString.AppendLiteral(":not(");
}
//
// Builds the textual representation of a selector. Called by DOM 2 CSS
// StyleRule:selectorText
//
void
nsCSSSelector::ToString(nsAString& aString, nsICSSStyleSheet* aSheet,
PRBool aAppend) const
{
if (!aAppend)
aString.Truncate();
ToStringInternal(aString, aSheet, IsPseudoElement(mTag), PR_FALSE);
}
void nsCSSSelector::ToStringInternal(nsAString& aString,
nsICSSStyleSheet* aSheet,
PRBool aIsPseudoElem,
PRBool aIsNegated) const
{
nsAutoString temp;
PRBool isPseudoElement = IsPseudoElement(mTag);
// selectors are linked from right-to-left, so the next selector in the linked list
// actually precedes this one in the resulting string
if (mNext) {
mNext->ToStringInternal(aString, aSheet, IsPseudoElement(mTag), 0);
if (!aIsNegated && !isPseudoElement) {
// don't add a leading whitespace if we have a pseudo-element
// or a negated simple selector
aString.Append(PRUnichar(' '));
}
}
// For non-pseudo-element selectors or for lone pseudo-elements, deal with
// namespace prefixes.
PRBool wroteNamespace = PR_FALSE;
if (!isPseudoElement || !mNext) {
// append the namespace prefix if needed
if (mNameSpace == kNameSpaceID_None) {
// The only way to do this in CSS is to have an explicit namespace
// of "none" specified in the sheet by having a '|' with nothing
// before it.
aString.Append(PRUnichar('|'));
wroteNamespace = PR_TRUE;
} else {
if (aSheet) {
nsXMLNameSpaceMap *sheetNS = aSheet->GetNameSpaceMap();
// sheetNS is non-null if and only if we had an @namespace rule. If it's
// null, that means that the only namespaces we could have are the
// wildcard namespace (which can be implicit in this case) and the "none"
// namespace, which we handled above. So no need to output anything when
// sheetNS is null.
if (sheetNS) {
if (mNameSpace != kNameSpaceID_Unknown) {
if (sheetNS->FindNameSpaceID(nsnull) != mNameSpace) {
nsIAtom *prefixAtom = sheetNS->FindPrefix(mNameSpace);
NS_ASSERTION(prefixAtom, "how'd we get a non-default namespace "
"without a prefix?");
nsAutoString prefix;
prefixAtom->ToString(prefix);
aString.Append(prefix);
aString.Append(PRUnichar('|'));
wroteNamespace = PR_TRUE;
}
// otherwise it must be the default namespace
} else {
// A selector for an element in any namespace.
if (// Use explicit "*|" only when it's not implied
sheetNS->FindNameSpaceID(nsnull) != kNameSpaceID_None &&
// :not() is special in that the default namespace is
// not implied for non-type selectors
(!aIsNegated || (!mIDList && !mClassList &&
!mPseudoClassList && !mAttrList))) {
aString.AppendLiteral("*|");
wroteNamespace = PR_TRUE;
}
}
}
}
}
}
if (!mTag) {
// Universal selector: avoid writing the universal selector when we
// can avoid it, especially since we're required to avoid it for the
// inside of :not()
if (wroteNamespace ||
(!mIDList && !mClassList && !mPseudoClassList && !mAttrList &&
(aIsNegated || !mNegations))) {
aString.Append(PRUnichar('*'));
}
} else {
// Append the tag name
if (isPseudoElement) {
if (!mNext) {
// Lone pseudo-element selector -- toss in a wildcard type selector
// XXXldb Why?
aString.Append(PRUnichar('*'));
}
if (!nsCSSPseudoElements::IsCSS2PseudoElement(mTag)) {
aString.Append(PRUnichar(':'));
}
}
nsAutoString prefix;
mTag->ToString(prefix);
aString.Append(prefix);
}
// Append the id, if there is one
if (mIDList) {
nsAtomList* list = mIDList;
while (list != nsnull) {
list->mAtom->ToString(temp);
aString.Append(PRUnichar('#'));
aString.Append(temp);
list = list->mNext;
}
}
// Append each class in the linked list
if (mClassList) {
nsAtomList* list = mClassList;
while (list != nsnull) {
list->mAtom->ToString(temp);
aString.Append(PRUnichar('.'));
aString.Append(temp);
list = list->mNext;
}
}
// Append each attribute selector in the linked list
if (mAttrList) {
nsAttrSelector* list = mAttrList;
while (list != nsnull) {
aString.Append(PRUnichar('['));
// Append the namespace prefix
if (list->mNameSpace > 0) {
if (aSheet) {
nsXMLNameSpaceMap *sheetNS = aSheet->GetNameSpaceMap();
// will return null if namespace was the default
nsIAtom *prefixAtom = sheetNS->FindPrefix(list->mNameSpace);
if (prefixAtom) {
nsAutoString prefix;
prefixAtom->ToString(prefix);
aString.Append(prefix);
aString.Append(PRUnichar('|'));
}
}
}
// Append the attribute name
list->mAttr->ToString(temp);
aString.Append(temp);
if (list->mFunction != NS_ATTR_FUNC_SET) {
// Append the function
if (list->mFunction == NS_ATTR_FUNC_INCLUDES)
aString.Append(PRUnichar('~'));
else if (list->mFunction == NS_ATTR_FUNC_DASHMATCH)
aString.Append(PRUnichar('|'));
else if (list->mFunction == NS_ATTR_FUNC_BEGINSMATCH)
aString.Append(PRUnichar('^'));
else if (list->mFunction == NS_ATTR_FUNC_ENDSMATCH)
aString.Append(PRUnichar('$'));
else if (list->mFunction == NS_ATTR_FUNC_CONTAINSMATCH)
aString.Append(PRUnichar('*'));
aString.Append(PRUnichar('='));
// Append the value
nsAutoString escaped;
nsStyleUtil::EscapeCSSString(list->mValue, escaped);
aString.Append(PRUnichar('\"'));
aString.Append(escaped);
aString.Append(PRUnichar('\"'));
}
aString.Append(PRUnichar(']'));
list = list->mNext;
}
}
// Append each pseudo-class in the linked list
if (mPseudoClassList) {
nsAtomStringList* list = mPseudoClassList;
while (list != nsnull) {
list->mAtom->ToString(temp);
aString.Append(temp);
if (nsnull != list->mString) {
aString.Append(PRUnichar('('));
aString.Append(list->mString);
aString.Append(PRUnichar(')'));
}
list = list->mNext;
}
}
if (!aIsNegated) {
for (nsCSSSelector* negation = mNegations; negation;
negation = negation->mNegations) {
aString.AppendLiteral(":not(");
negation->ToStringInternal(aString, aSheet, PR_FALSE, PR_TRUE);
aString.Append(PRUnichar(')'));
}
}
// Append the operator only if the selector is not negated and is not
// a pseudo-element
if (!aIsNegated && mOperator && !aIsPseudoElem) {
aString.Append(PRUnichar(' '));
aString.Append(mOperator);
}
}
// -- nsCSSSelectorList -------------------------------
nsCSSSelectorList::nsCSSSelectorList(void)
: mSelectors(nsnull),
mWeight(0),
mNext(nsnull)
{
MOZ_COUNT_CTOR(nsCSSSelectorList);
}
nsCSSSelectorList::~nsCSSSelectorList()
{
MOZ_COUNT_DTOR(nsCSSSelectorList);
NS_IF_DELETE(mSelectors);
NS_IF_DEEP_DELETE(nsCSSSelectorList, mNext);
}
void nsCSSSelectorList::AddSelector(const nsCSSSelector& aSelector)
{ // prepend to list
nsCSSSelector* newSel = aSelector.Clone();
if (newSel) {
newSel->mNext = mSelectors;
mSelectors = newSel;
}
}
void
nsCSSSelectorList::ToString(nsAString& aResult, nsICSSStyleSheet* aSheet)
{
aResult.Truncate();
nsCSSSelectorList *p = this;
for (;;) {
p->mSelectors->ToString(aResult, aSheet, PR_TRUE);
p = p->mNext;
if (!p)
break;
aResult.AppendLiteral(", ");
}
}
nsCSSSelectorList*
nsCSSSelectorList::Clone(PRBool aDeep) const
{
nsCSSSelectorList *result = new nsCSSSelectorList();
result->mWeight = mWeight;
NS_IF_CLONE(mSelectors);
if (aDeep) {
NS_IF_DEEP_CLONE(nsCSSSelectorList, mNext, (PR_FALSE));
}
return result;
}
// -- CSSImportantRule -------------------------------
class CSSStyleRuleImpl;
class CSSImportantRule : public nsIStyleRule {
public:
CSSImportantRule(nsCSSDeclaration* aDeclaration);
NS_DECL_ISUPPORTS
// nsIStyleRule interface
NS_IMETHOD MapRuleInfoInto(nsRuleData* aRuleData);
#ifdef DEBUG
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
#endif
protected:
virtual ~CSSImportantRule(void);
nsCSSDeclaration* mDeclaration;
friend class CSSStyleRuleImpl;
};
CSSImportantRule::CSSImportantRule(nsCSSDeclaration* aDeclaration)
: mDeclaration(aDeclaration)
{
}
CSSImportantRule::~CSSImportantRule(void)
{
mDeclaration = nsnull;
}
NS_IMPL_ISUPPORTS1(CSSImportantRule, nsIStyleRule)
NS_IMETHODIMP
CSSImportantRule::MapRuleInfoInto(nsRuleData* aRuleData)
{
// Check this at runtime because it might be hit in some out-of-memory cases.
NS_ENSURE_TRUE(mDeclaration->HasImportantData(), NS_ERROR_UNEXPECTED);
return mDeclaration->MapImportantRuleInfoInto(aRuleData);
}
#ifdef DEBUG
NS_IMETHODIMP
CSSImportantRule::List(FILE* out, PRInt32 aIndent) const
{
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
fputs("! Important rule ", out);
if (nsnull != mDeclaration) {
mDeclaration->List(out);
}
else {
fputs("{ null declaration }", out);
}
fputs("\n", out);
return NS_OK;
}
#endif
// --------------------------------------------------------
class DOMCSSStyleRuleImpl;
class DOMCSSDeclarationImpl : public nsDOMCSSDeclaration
{
public:
DOMCSSDeclarationImpl(nsICSSStyleRule *aRule);
virtual ~DOMCSSDeclarationImpl(void);
NS_IMETHOD GetParentRule(nsIDOMCSSRule **aParent);
virtual void DropReference(void);
virtual nsresult GetCSSDeclaration(nsCSSDeclaration **aDecl,
PRBool aAllocate);
virtual nsresult GetCSSParsingEnvironment(nsIURI** aSheetURI,
nsIURI** aBaseURI,
nsIPrincipal** aSheetPrincipal,
nsICSSLoader** aCSSLoader,
nsICSSParser** aCSSParser);
virtual nsresult DeclarationChanged();
// Override |AddRef| and |Release| for being a member of
// |DOMCSSStyleRuleImpl|.
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
friend class DOMCSSStyleRuleImpl;
protected:
// This reference is not reference-counted. The rule object tells us
// when it's about to go away.
nsICSSStyleRule *mRule;
inline DOMCSSStyleRuleImpl* DomRule();
private:
// NOT TO BE IMPLEMENTED
// This object cannot be allocated on its own. It must be a member of
// DOMCSSStyleRuleImpl.
void* operator new(size_t size) CPP_THROW_NEW;
};
class DOMCSSStyleRuleImpl : public nsICSSStyleRuleDOMWrapper
{
public:
DOMCSSStyleRuleImpl(nsICSSStyleRule *aRule);
virtual ~DOMCSSStyleRuleImpl();
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMCSSRULE
NS_DECL_NSIDOMCSSSTYLERULE
// nsICSSStyleRuleDOMWrapper
NS_IMETHOD GetCSSStyleRule(nsICSSStyleRule **aResult);
DOMCSSDeclarationImpl* DOMDeclaration() { return &mDOMDeclaration; }
friend class DOMCSSDeclarationImpl;
protected:
DOMCSSDeclarationImpl mDOMDeclaration;
nsICSSStyleRule* Rule() {
return mDOMDeclaration.mRule;
}
};
DOMCSSDeclarationImpl::DOMCSSDeclarationImpl(nsICSSStyleRule *aRule)
: mRule(aRule)
{
MOZ_COUNT_CTOR(DOMCSSDeclarationImpl);
}
DOMCSSDeclarationImpl::~DOMCSSDeclarationImpl(void)
{
NS_ASSERTION(!mRule, "DropReference not called.");
MOZ_COUNT_DTOR(DOMCSSDeclarationImpl);
}
inline DOMCSSStyleRuleImpl* DOMCSSDeclarationImpl::DomRule()
{
return reinterpret_cast<DOMCSSStyleRuleImpl*>
(reinterpret_cast<char*>(this) -
offsetof(DOMCSSStyleRuleImpl, mDOMDeclaration));
}
NS_IMPL_ADDREF_USING_AGGREGATOR(DOMCSSDeclarationImpl, DomRule())
NS_IMPL_RELEASE_USING_AGGREGATOR(DOMCSSDeclarationImpl, DomRule())
void
DOMCSSDeclarationImpl::DropReference(void)
{
mRule = nsnull;
}
nsresult
DOMCSSDeclarationImpl::GetCSSDeclaration(nsCSSDeclaration **aDecl,
PRBool aAllocate)
{
if (mRule) {
*aDecl = mRule->GetDeclaration();
}
else {
*aDecl = nsnull;
}
return NS_OK;
}
/*
* This is a utility function. It will only fail if it can't get a
* parser. This means it can return NS_OK without aURI or aCSSLoader
* being initialized.
*/
nsresult
DOMCSSDeclarationImpl::GetCSSParsingEnvironment(nsIURI** aSheetURI,
nsIURI** aBaseURI,
nsIPrincipal** aSheetPrincipal,
nsICSSLoader** aCSSLoader,
nsICSSParser** aCSSParser)
{
// null out the out params since some of them may not get initialized below
*aSheetURI = nsnull;
*aBaseURI = nsnull;
*aSheetPrincipal = nsnull;
*aCSSLoader = nsnull;
*aCSSParser = nsnull;
nsresult result;
nsCOMPtr<nsIStyleSheet> sheet;
if (mRule) {
mRule->GetStyleSheet(*getter_AddRefs(sheet));
if (sheet) {
sheet->GetSheetURI(aSheetURI);
sheet->GetBaseURI(aBaseURI);
nsCOMPtr<nsICSSStyleSheet> cssSheet(do_QueryInterface(sheet));
if (cssSheet) {
NS_ADDREF(*aSheetPrincipal = cssSheet->Principal());
}
nsCOMPtr<nsIDocument> document;
sheet->GetOwningDocument(*getter_AddRefs(document));
if (document) {
NS_ADDREF(*aCSSLoader = document->CSSLoader());
}
}
}
// XXXldb Why bother if |mRule| is null?
if (*aCSSLoader) {
result = (*aCSSLoader)->GetParserFor(nsnull, aCSSParser);
} else {
result = NS_NewCSSParser(aCSSParser);
}
if (NS_SUCCEEDED(result) && !*aSheetPrincipal) {
result = CallCreateInstance("@mozilla.org/nullprincipal;1",
aSheetPrincipal);
}
return result;
}
NS_IMETHODIMP
DOMCSSDeclarationImpl::GetParentRule(nsIDOMCSSRule **aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
if (!mRule) {
*aParent = nsnull;
return NS_OK;
}
return mRule->GetDOMRule(aParent);
}
nsresult
DOMCSSDeclarationImpl::DeclarationChanged()
{
NS_PRECONDITION(mRule,
"can only be called when |GetCSSDeclaration| returned a declaration");
nsCOMPtr<nsIDocument> owningDoc;
nsCOMPtr<nsIStyleSheet> sheet;
mRule->GetStyleSheet(*getter_AddRefs(sheet));
if (sheet) {
sheet->GetOwningDocument(*getter_AddRefs(owningDoc));
}
mozAutoDocUpdate updateBatch(owningDoc, UPDATE_STYLE, PR_TRUE);
nsCOMPtr<nsICSSStyleRule> oldRule = mRule;
mRule = oldRule->DeclarationChanged(PR_TRUE).get();
if (!mRule)
return NS_ERROR_OUT_OF_MEMORY;
nsrefcnt cnt = mRule->Release();
if (cnt == 0) {
NS_NOTREACHED("container didn't take ownership");
mRule = nsnull;
return NS_ERROR_UNEXPECTED;
}
if (owningDoc) {
owningDoc->StyleRuleChanged(sheet, oldRule, mRule);
}
return NS_OK;
}
DOMCSSStyleRuleImpl::DOMCSSStyleRuleImpl(nsICSSStyleRule* aRule)
: mDOMDeclaration(aRule)
{
}
DOMCSSStyleRuleImpl::~DOMCSSStyleRuleImpl()
{
}
NS_INTERFACE_MAP_BEGIN(DOMCSSStyleRuleImpl)
NS_INTERFACE_MAP_ENTRY(nsICSSStyleRuleDOMWrapper)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSStyleRule)
NS_INTERFACE_MAP_ENTRY(nsIDOMCSSRule)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CSSStyleRule)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF(DOMCSSStyleRuleImpl)
NS_IMPL_RELEASE(DOMCSSStyleRuleImpl)
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetType(PRUint16* aType)
{
*aType = nsIDOMCSSRule::STYLE_RULE;
return NS_OK;
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetCssText(nsAString& aCssText)
{
if (!Rule()) {
aCssText.Truncate();
return NS_OK;
}
return Rule()->GetCssText(aCssText);
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::SetCssText(const nsAString& aCssText)
{
if (!Rule()) {
return NS_OK;
}
return Rule()->SetCssText(aCssText);
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetParentStyleSheet(nsIDOMCSSStyleSheet** aSheet)
{
if (!Rule()) {
*aSheet = nsnull;
return NS_OK;
}
nsCOMPtr<nsICSSStyleSheet> sheet;
Rule()->GetParentStyleSheet(getter_AddRefs(sheet));
if (!sheet) {
*aSheet = nsnull;
return NS_OK;
}
return CallQueryInterface(sheet, aSheet);
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetParentRule(nsIDOMCSSRule** aParentRule)
{
if (!Rule()) {
*aParentRule = nsnull;
return NS_OK;
}
nsCOMPtr<nsICSSGroupRule> rule;
Rule()->GetParentRule(getter_AddRefs(rule));
if (!rule) {
*aParentRule = nsnull;
return NS_OK;
}
return rule->GetDOMRule(aParentRule);
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetSelectorText(nsAString& aSelectorText)
{
if (!Rule()) {
aSelectorText.Truncate();
return NS_OK;
}
return Rule()->GetSelectorText(aSelectorText);
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::SetSelectorText(const nsAString& aSelectorText)
{
if (!Rule()) {
return NS_OK;
}
return Rule()->SetSelectorText(aSelectorText);
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetStyle(nsIDOMCSSStyleDeclaration** aStyle)
{
*aStyle = &mDOMDeclaration;
NS_ADDREF(*aStyle);
return NS_OK;
}
NS_IMETHODIMP
DOMCSSStyleRuleImpl::GetCSSStyleRule(nsICSSStyleRule **aResult)
{
*aResult = Rule();
NS_IF_ADDREF(*aResult);
return NS_OK;
}
// -- nsCSSStyleRule -------------------------------
class CSSStyleRuleImpl : public nsCSSRule,
public nsICSSStyleRule
{
public:
CSSStyleRuleImpl(nsCSSSelectorList* aSelector,
nsCSSDeclaration *aDeclaration);
private:
// for |Clone|
CSSStyleRuleImpl(const CSSStyleRuleImpl& aCopy);
// for |DeclarationChanged|
CSSStyleRuleImpl(CSSStyleRuleImpl& aCopy,
nsCSSDeclaration *aDeclaration);
public:
NS_DECL_ISUPPORTS_INHERITED
virtual nsCSSSelectorList* Selector(void);
virtual PRUint32 GetLineNumber(void) const;
virtual void SetLineNumber(PRUint32 aLineNumber);
virtual nsCSSDeclaration* GetDeclaration(void) const;
virtual already_AddRefed<nsIStyleRule> GetImportantRule(void);
NS_IMETHOD GetStyleSheet(nsIStyleSheet*& aSheet) const;
NS_IMETHOD SetStyleSheet(nsICSSStyleSheet* aSheet);
NS_IMETHOD SetParentRule(nsICSSGroupRule* aRule);
virtual nsresult GetCssText(nsAString& aCssText);
virtual nsresult SetCssText(const nsAString& aCssText);
virtual nsresult GetParentStyleSheet(nsICSSStyleSheet** aSheet);
virtual nsresult GetParentRule(nsICSSGroupRule** aParentRule);
virtual nsresult GetSelectorText(nsAString& aSelectorText);
virtual nsresult SetSelectorText(const nsAString& aSelectorText);
NS_IMETHOD GetType(PRInt32& aType) const;
NS_IMETHOD Clone(nsICSSRule*& aClone) const;
NS_IMETHOD GetDOMRule(nsIDOMCSSRule** aDOMRule);
virtual already_AddRefed<nsICSSStyleRule>
DeclarationChanged(PRBool aHandleContainer);
// The new mapping function.
NS_IMETHOD MapRuleInfoInto(nsRuleData* aRuleData);
#ifdef DEBUG
NS_IMETHOD List(FILE* out = stdout, PRInt32 aIndent = 0) const;
#endif
private:
// These are not supported and are not implemented!
CSSStyleRuleImpl& operator=(const CSSStyleRuleImpl& aCopy);
protected:
virtual ~CSSStyleRuleImpl(void);
protected:
nsCSSSelectorList* mSelector; // null for style attribute
nsCSSDeclaration* mDeclaration;
CSSImportantRule* mImportantRule;
DOMCSSStyleRuleImpl* mDOMRule;
PRUint32 mLineNumber;
};
CSSStyleRuleImpl::CSSStyleRuleImpl(nsCSSSelectorList* aSelector,
nsCSSDeclaration* aDeclaration)
: nsCSSRule(),
mSelector(aSelector),
mDeclaration(aDeclaration),
mImportantRule(nsnull),
mDOMRule(nsnull),
mLineNumber(0)
{
mDeclaration->AddRef();
}
// for |Clone|
CSSStyleRuleImpl::CSSStyleRuleImpl(const CSSStyleRuleImpl& aCopy)
: nsCSSRule(aCopy),
mSelector(aCopy.mSelector ? aCopy.mSelector->Clone() : nsnull),
mDeclaration(aCopy.mDeclaration->Clone()),
mImportantRule(nsnull),
mDOMRule(nsnull),
mLineNumber(aCopy.mLineNumber)
{
if (mDeclaration)
mDeclaration->AddRef();
// rest is constructed lazily on existing data
}
// for |DeclarationChanged|
CSSStyleRuleImpl::CSSStyleRuleImpl(CSSStyleRuleImpl& aCopy,
nsCSSDeclaration* aDeclaration)
: nsCSSRule(aCopy),
mSelector(aCopy.mSelector),
mDeclaration(aDeclaration),
mImportantRule(nsnull),
mDOMRule(aCopy.mDOMRule),
mLineNumber(aCopy.mLineNumber)
{
// The DOM rule is replacing |aCopy| with |this|, so transfer
// the reverse pointer as well (and transfer ownership).
aCopy.mDOMRule = nsnull;
NS_ASSERTION(aDeclaration == aCopy.mDeclaration, "declaration mismatch");
// Transfer ownership of selector and declaration:
aCopy.mSelector = nsnull;
#if 0
aCopy.mDeclaration = nsnull;
#else
// We ought to be able to transfer ownership of the selector and the
// declaration since this rule should now be unused, but unfortunately
// SetInlineStyleRule might use it before setting the new rule (see
// stack in bug 209575). So leave the declaration pointer on the old
// rule.
mDeclaration->AddRef();
#endif
}
CSSStyleRuleImpl::~CSSStyleRuleImpl(void)
{
if (mSelector) {
delete mSelector;
mSelector = nsnull;
}
if (nsnull != mDeclaration) {
mDeclaration->Release();
mDeclaration = nsnull;
}
if (nsnull != mImportantRule) {
NS_RELEASE(mImportantRule);
mImportantRule = nsnull;
}
if (mDOMRule) {
mDOMRule->DOMDeclaration()->DropReference();
NS_RELEASE(mDOMRule);
}
}
// QueryInterface implementation for CSSStyleRuleImpl
NS_INTERFACE_MAP_BEGIN(CSSStyleRuleImpl)
NS_INTERFACE_MAP_ENTRY(nsICSSStyleRule)
NS_INTERFACE_MAP_ENTRY(nsICSSRule)
NS_INTERFACE_MAP_ENTRY(nsIStyleRule)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsICSSStyleRule)
NS_INTERFACE_MAP_END
NS_IMPL_ADDREF_INHERITED(CSSStyleRuleImpl, nsCSSRule)
NS_IMPL_RELEASE_INHERITED(CSSStyleRuleImpl, nsCSSRule)
nsCSSSelectorList* CSSStyleRuleImpl::Selector(void)
{
return mSelector;
}
PRUint32 CSSStyleRuleImpl::GetLineNumber(void) const
{
return mLineNumber;
}
void CSSStyleRuleImpl::SetLineNumber(PRUint32 aLineNumber)
{
mLineNumber = aLineNumber;
}
nsCSSDeclaration* CSSStyleRuleImpl::GetDeclaration(void) const
{
return mDeclaration;
}
already_AddRefed<nsIStyleRule> CSSStyleRuleImpl::GetImportantRule(void)
{
if (!mDeclaration->HasImportantData()) {
NS_ASSERTION(!mImportantRule, "immutable, so should be no important rule");
return nsnull;
}
if (!mImportantRule) {
mImportantRule = new CSSImportantRule(mDeclaration);
if (!mImportantRule)
return nsnull;
NS_ADDREF(mImportantRule);
}
NS_ADDREF(mImportantRule);
return mImportantRule;
}
NS_IMETHODIMP
CSSStyleRuleImpl::GetStyleSheet(nsIStyleSheet*& aSheet) const
{
// XXX What about inner, etc.
return nsCSSRule::GetStyleSheet(aSheet);
}
NS_IMETHODIMP
CSSStyleRuleImpl::SetStyleSheet(nsICSSStyleSheet* aSheet)
{
return nsCSSRule::SetStyleSheet(aSheet);
}
NS_IMETHODIMP
CSSStyleRuleImpl::SetParentRule(nsICSSGroupRule* aRule)
{
return nsCSSRule::SetParentRule(aRule);
}
NS_IMETHODIMP
CSSStyleRuleImpl::GetType(PRInt32& aType) const
{
aType = nsICSSRule::STYLE_RULE;
return NS_OK;
}
NS_IMETHODIMP
CSSStyleRuleImpl::Clone(nsICSSRule*& aClone) const
{
CSSStyleRuleImpl* clone = new CSSStyleRuleImpl(*this);
if (!clone || !clone->mDeclaration || (!clone->mSelector != !mSelector)) {
delete clone;
aClone = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
return CallQueryInterface(clone, &aClone);
}
NS_IMETHODIMP
CSSStyleRuleImpl::GetDOMRule(nsIDOMCSSRule** aDOMRule)
{
if (!mSheet) {
// inline style rules aren't supposed to have a DOM rule object, only
// a declaration.
*aDOMRule = nsnull;
return NS_OK;
}
if (!mDOMRule) {
mDOMRule = new DOMCSSStyleRuleImpl(this);
if (!mDOMRule) {
*aDOMRule = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
NS_ADDREF(mDOMRule);
}
*aDOMRule = mDOMRule;
NS_ADDREF(*aDOMRule);
return NS_OK;
}
/* virtual */ already_AddRefed<nsICSSStyleRule>
CSSStyleRuleImpl::DeclarationChanged(PRBool aHandleContainer)
{
CSSStyleRuleImpl* clone = new CSSStyleRuleImpl(*this, mDeclaration);
if (!clone) {
return nsnull;
}
NS_ADDREF(clone); // for return
if (aHandleContainer) {
NS_ASSERTION(mSheet, "rule must be in a sheet");
if (mParentRule) {
mSheet->ReplaceRuleInGroup(mParentRule, this, clone);
} else {
mSheet->ReplaceStyleRule(this, clone);
}
}
return clone;
}
NS_IMETHODIMP
CSSStyleRuleImpl::MapRuleInfoInto(nsRuleData* aRuleData)
{
return mDeclaration->MapRuleInfoInto(aRuleData);
}
#ifdef DEBUG
NS_IMETHODIMP
CSSStyleRuleImpl::List(FILE* out, PRInt32 aIndent) const
{
// Indent
for (PRInt32 index = aIndent; --index >= 0; ) fputs(" ", out);
nsAutoString buffer;
if (mSelector)
mSelector->ToString(buffer, mSheet);
buffer.AppendLiteral(" ");
fputs(NS_LossyConvertUTF16toASCII(buffer).get(), out);
if (nsnull != mDeclaration) {
mDeclaration->List(out);
}
else {
fputs("{ null declaration }", out);
}
fputs("\n", out);
return NS_OK;
}
#endif
/* virtual */ nsresult
CSSStyleRuleImpl::GetCssText(nsAString& aCssText)
{
if (mSelector) {
mSelector->ToString(aCssText, mSheet);
aCssText.Append(PRUnichar(' '));
}
aCssText.Append(PRUnichar('{'));
aCssText.Append(PRUnichar(' '));
if (mDeclaration)
{
nsAutoString tempString;
mDeclaration->ToString( tempString );
aCssText.Append( tempString );
}
aCssText.Append(PRUnichar(' '));
aCssText.Append(PRUnichar('}'));
return NS_OK;
}
/* virtual */ nsresult
CSSStyleRuleImpl::SetCssText(const nsAString& aCssText)
{
// XXX TBI - need to re-parse rule & declaration
return NS_OK;
}
/* virtual */ nsresult
CSSStyleRuleImpl::GetParentStyleSheet(nsICSSStyleSheet** aSheet)
{
*aSheet = mSheet;
NS_IF_ADDREF(*aSheet);
return NS_OK;
}
/* virtual */ nsresult
CSSStyleRuleImpl::GetParentRule(nsICSSGroupRule** aParentRule)
{
*aParentRule = mParentRule;
NS_IF_ADDREF(*aParentRule);
return NS_OK;
}
/* virtual */ nsresult
CSSStyleRuleImpl::GetSelectorText(nsAString& aSelectorText)
{
if (mSelector)
mSelector->ToString(aSelectorText, mSheet);
else
aSelectorText.Truncate();
return NS_OK;
}
/* virtual */ nsresult
CSSStyleRuleImpl::SetSelectorText(const nsAString& aSelectorText)
{
// XXX TBI - get a parser and re-parse the selectors,
// XXX then need to re-compute the cascade
// XXX and dirty sheet
return NS_OK;
}
nsresult
NS_NewCSSStyleRule(nsICSSStyleRule** aInstancePtrResult,
nsCSSSelectorList* aSelector,
nsCSSDeclaration* aDeclaration)
{
NS_PRECONDITION(aDeclaration, "must have a declaration");
CSSStyleRuleImpl *it = new CSSStyleRuleImpl(aSelector, aDeclaration);
if (!it) {
return NS_ERROR_OUT_OF_MEMORY;
}
return CallQueryInterface(it, aInstancePtrResult);
}
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