gecko-dev/layout/style/nsCSSStyleSheet.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
// vim:cindent:tabstop=2:expandtab:shiftwidth=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):
* L. David Baron <dbaron@dbaron.org>
* Pierre Phaneuf <pp@ludusdesign.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
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* the provisions above, a recipient may use your version of this file under
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* ***** END LICENSE BLOCK ***** */
/* representation of a CSS style sheet */
#ifndef nsCSSStyleSheet_h_
#define nsCSSStyleSheet_h_
#include "nscore.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsICSSStyleSheet.h"
#include "nsIDOMCSSStyleSheet.h"
#include "nsICSSLoaderObserver.h"
#include "nsTArray.h"
#include "nsCOMArray.h"
class nsIURI;
class nsMediaList;
class nsMediaQueryResultCacheKey;
class nsCSSStyleSheet;
class nsPresContext;
// -------------------------------
// CSS Style Sheet Inner Data Container
//
class nsCSSStyleSheetInner {
public:
friend class nsCSSStyleSheet;
friend class nsCSSRuleProcessor;
friend nsresult NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult);
private:
nsCSSStyleSheetInner(nsICSSStyleSheet* aPrimarySheet);
nsCSSStyleSheetInner(nsCSSStyleSheetInner& aCopy,
nsCSSStyleSheet* aPrimarySheet);
~nsCSSStyleSheetInner();
nsCSSStyleSheetInner* CloneFor(nsCSSStyleSheet* aPrimarySheet);
void AddSheet(nsICSSStyleSheet* aSheet);
void RemoveSheet(nsICSSStyleSheet* aSheet);
void RebuildNameSpaces();
// Create a new namespace map
nsresult CreateNamespaceMap();
nsAutoTArray<nsICSSStyleSheet*, 8> mSheets;
nsCOMPtr<nsIURI> mSheetURI; // for error reports, etc.
nsCOMPtr<nsIURI> mOriginalSheetURI; // for GetHref. Can be null.
nsCOMPtr<nsIURI> mBaseURI; // for resolving relative URIs
nsCOMPtr<nsIPrincipal> mPrincipal;
nsCOMArray<nsICSSRule> mOrderedRules;
nsAutoPtr<nsXMLNameSpaceMap> mNameSpaceMap;
// Linked list of child sheets. This is al fundamentally broken, because
// each of the child sheets has a unique parent... We can only hope (and
// currently this is the case) that any time page JS can get ts hands on a
// child sheet that means we've already ensured unique inners throughout its
// parent chain and things are good.
nsRefPtr<nsCSSStyleSheet> mFirstChild;
PRBool mComplete;
#ifdef DEBUG
PRBool mPrincipalSet;
#endif
};
// -------------------------------
// CSS Style Sheet
//
class CSSRuleListImpl;
struct ChildSheetListBuilder;
class nsCSSStyleSheet : public nsICSSStyleSheet,
public nsIDOMCSSStyleSheet,
public nsICSSLoaderObserver
{
public:
nsCSSStyleSheet();
NS_DECL_ISUPPORTS
// nsIStyleSheet interface
NS_IMETHOD GetSheetURI(nsIURI** aSheetURI) const;
NS_IMETHOD GetBaseURI(nsIURI** aBaseURI) const;
NS_IMETHOD GetTitle(nsString& aTitle) const;
NS_IMETHOD GetType(nsString& aType) const;
NS_IMETHOD_(PRBool) HasRules() const;
NS_IMETHOD GetApplicable(PRBool& aApplicable) const;
NS_IMETHOD SetEnabled(PRBool aEnabled);
NS_IMETHOD GetComplete(PRBool& aComplete) const;
NS_IMETHOD SetComplete();
NS_IMETHOD GetParentSheet(nsIStyleSheet*& aParent) const; // may be null
NS_IMETHOD GetOwningDocument(nsIDocument*& aDocument) const; // may be null
NS_IMETHOD SetOwningDocument(nsIDocument* aDocument);
#ifdef DEBUG
virtual void List(FILE* out = stdout, PRInt32 aIndent = 0) const;
#endif
// nsICSSStyleSheet interface
NS_IMETHOD AppendStyleSheet(nsICSSStyleSheet* aSheet);
NS_IMETHOD InsertStyleSheetAt(nsICSSStyleSheet* aSheet, PRInt32 aIndex);
NS_IMETHOD PrependStyleRule(nsICSSRule* aRule);
NS_IMETHOD AppendStyleRule(nsICSSRule* aRule);
NS_IMETHOD ReplaceStyleRule(nsICSSRule* aOld, nsICSSRule* aNew);
NS_IMETHOD StyleRuleCount(PRInt32& aCount) const;
NS_IMETHOD GetStyleRuleAt(PRInt32 aIndex, nsICSSRule*& aRule) const;
NS_IMETHOD DeleteRuleFromGroup(nsICSSGroupRule* aGroup, PRUint32 aIndex);
NS_IMETHOD InsertRuleIntoGroup(const nsAString& aRule, nsICSSGroupRule* aGroup, PRUint32 aIndex, PRUint32* _retval);
NS_IMETHOD ReplaceRuleInGroup(nsICSSGroupRule* aGroup, nsICSSRule* aOld, nsICSSRule* aNew);
NS_IMETHOD StyleSheetCount(PRInt32& aCount) const;
NS_IMETHOD GetStyleSheetAt(PRInt32 aIndex, nsICSSStyleSheet*& aSheet) const;
NS_IMETHOD SetURIs(nsIURI* aSheetURI, nsIURI* aOriginalSheetURI,
nsIURI* aBaseURI);
virtual void SetPrincipal(nsIPrincipal* aPrincipal);
virtual nsIPrincipal* Principal() const;
NS_IMETHOD SetTitle(const nsAString& aTitle);
NS_IMETHOD SetMedia(nsMediaList* aMedia);
NS_IMETHOD SetOwningNode(nsIDOMNode* aOwningNode);
NS_IMETHOD SetOwnerRule(nsICSSImportRule* aOwnerRule);
NS_IMETHOD GetOwnerRule(nsICSSImportRule** aOwnerRule);
virtual nsXMLNameSpaceMap* GetNameSpaceMap() const;
NS_IMETHOD Clone(nsICSSStyleSheet* aCloneParent,
nsICSSImportRule* aCloneOwnerRule,
nsIDocument* aCloneDocument,
nsIDOMNode* aCloneOwningNode,
nsICSSStyleSheet** aClone) const;
NS_IMETHOD IsModified(PRBool* aSheetModified) const;
NS_IMETHOD SetModified(PRBool aModified);
NS_IMETHOD AddRuleProcessor(nsCSSRuleProcessor* aProcessor);
NS_IMETHOD DropRuleProcessor(nsCSSRuleProcessor* aProcessor);
NS_IMETHOD InsertRuleInternal(const nsAString& aRule,
PRUint32 aIndex, PRUint32* aReturn);
NS_IMETHOD_(nsIURI*) GetOriginalURI() const;
// nsICSSLoaderObserver interface
NS_IMETHOD StyleSheetLoaded(nsICSSStyleSheet* aSheet, PRBool aWasAlternate,
nsresult aStatus);
enum EnsureUniqueInnerResult {
// No work was needed to ensure a unique inner.
eUniqueInner_AlreadyUnique,
// A clone was done to ensure a unique inner (which means the style
// rules in this sheet have changed).
eUniqueInner_ClonedInner,
// A clone was attempted, but it failed.
eUniqueInner_CloneFailed
};
EnsureUniqueInnerResult EnsureUniqueInner();
// Append all of this sheet's child sheets to aArray. Return PR_TRUE
// on success and PR_FALSE on allocation failure.
PRBool AppendAllChildSheets(nsTArray<nsCSSStyleSheet*>& aArray);
PRBool UseForPresentation(nsPresContext* aPresContext,
nsMediaQueryResultCacheKey& aKey) const;
// nsIDOMStyleSheet interface
NS_DECL_NSIDOMSTYLESHEET
// nsIDOMCSSStyleSheet interface
NS_DECL_NSIDOMCSSSTYLESHEET
// Function used as a callback to rebuild our inner's child sheet
// list after we clone a unique inner for ourselves.
static PRBool RebuildChildList(nsICSSRule* aRule, void* aBuilder);
private:
nsCSSStyleSheet(const nsCSSStyleSheet& aCopy,
nsICSSStyleSheet* aParentToUse,
nsICSSImportRule* aOwnerRuleToUse,
nsIDocument* aDocumentToUse,
nsIDOMNode* aOwningNodeToUse);
// These are not supported and are not implemented!
nsCSSStyleSheet(const nsCSSStyleSheet& aCopy);
nsCSSStyleSheet& operator=(const nsCSSStyleSheet& aCopy);
protected:
virtual ~nsCSSStyleSheet();
void ClearRuleCascades();
nsresult WillDirty();
void DidDirty();
// Return success if the subject principal subsumes the principal of our
// inner, error otherwise. This will also succeed if the subject has
// UniversalBrowserWrite.
nsresult SubjectSubsumesInnerPrincipal() const;
// Add the namespace mapping from this @namespace rule to our namespace map
nsresult RegisterNamespaceRule(nsICSSRule* aRule);
protected:
nsString mTitle;
nsCOMPtr<nsMediaList> mMedia;
nsRefPtr<nsCSSStyleSheet> mNext;
nsICSSStyleSheet* mParent; // weak ref
nsICSSImportRule* mOwnerRule; // weak ref
CSSRuleListImpl* mRuleCollection;
nsIDocument* mDocument; // weak ref; parents maintain this for their children
nsIDOMNode* mOwningNode; // weak ref
PRPackedBool mDisabled;
PRPackedBool mDirty; // has been modified
nsCSSStyleSheetInner* mInner;
nsAutoTArray<nsCSSRuleProcessor*, 8>* mRuleProcessors;
friend class nsMediaList;
friend class nsCSSRuleProcessor;
friend nsresult NS_NewCSSStyleSheet(nsICSSStyleSheet** aInstancePtrResult);
friend struct ChildSheetListBuilder;
};
#endif /* !defined(nsCSSStyleSheet_h_) */