mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
1aa9d15695
Each nsCSSStyleSheet has a pointer to a nsCSSStyleSheetInner. The nsCSSStyleSheetInner is shared across multiple stylesheets, in general. The nsCSSStyleSheetInner owns the rules and the child stylesheets. What this means is that a given rule object is effectively owned by multiple sheets. However, cycles can only form through rule objects that have been JS-wrapped, and if we're JS-wrapping a rule object that means we have ensured that it's owned by only one stylesheet. Therefore, we only traverse and unlink mInner if it's uniquely owned by our sheet. Similarly, if our child sheets or any of their rules have been JS-wrapped, that means that we must have an mInner that we own outright.
314 lines
11 KiB
C++
314 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
// vim:cindent:tabstop=2:expandtab:shiftwidth=2:
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* representation of a CSS style sheet */
|
|
|
|
#ifndef nsCSSStyleSheet_h_
|
|
#define nsCSSStyleSheet_h_
|
|
|
|
#include "mozilla/Attributes.h"
|
|
|
|
#include "nscore.h"
|
|
#include "nsCOMPtr.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsIStyleSheet.h"
|
|
#include "nsIDOMCSSStyleSheet.h"
|
|
#include "nsICSSLoaderObserver.h"
|
|
#include "nsCOMArray.h"
|
|
#include "nsTArray.h"
|
|
#include "nsString.h"
|
|
#include "mozilla/CORSMode.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
|
|
class nsXMLNameSpaceMap;
|
|
class nsCSSRuleProcessor;
|
|
class nsMediaList;
|
|
class nsIPrincipal;
|
|
class nsIURI;
|
|
class nsMediaList;
|
|
class nsMediaQueryResultCacheKey;
|
|
class nsCSSStyleSheet;
|
|
class nsPresContext;
|
|
template<class E, class A> class nsTArray;
|
|
|
|
namespace mozilla {
|
|
namespace css {
|
|
class Rule;
|
|
class GroupRule;
|
|
class ImportRule;
|
|
}
|
|
}
|
|
|
|
// -------------------------------
|
|
// CSS Style Sheet Inner Data Container
|
|
//
|
|
|
|
class nsCSSStyleSheetInner {
|
|
public:
|
|
friend class nsCSSStyleSheet;
|
|
friend class nsCSSRuleProcessor;
|
|
private:
|
|
nsCSSStyleSheetInner(nsCSSStyleSheet* aPrimarySheet,
|
|
mozilla::CORSMode aCORSMode);
|
|
nsCSSStyleSheetInner(nsCSSStyleSheetInner& aCopy,
|
|
nsCSSStyleSheet* aPrimarySheet);
|
|
~nsCSSStyleSheetInner();
|
|
|
|
nsCSSStyleSheetInner* CloneFor(nsCSSStyleSheet* aPrimarySheet);
|
|
void AddSheet(nsCSSStyleSheet* aSheet);
|
|
void RemoveSheet(nsCSSStyleSheet* aSheet);
|
|
|
|
void RebuildNameSpaces();
|
|
|
|
// Create a new namespace map
|
|
nsresult CreateNamespaceMap();
|
|
|
|
size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const;
|
|
|
|
nsAutoTArray<nsCSSStyleSheet*, 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<mozilla::css::Rule> 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;
|
|
mozilla::CORSMode mCORSMode;
|
|
bool mComplete;
|
|
|
|
#ifdef DEBUG
|
|
bool mPrincipalSet;
|
|
#endif
|
|
};
|
|
|
|
|
|
// -------------------------------
|
|
// CSS Style Sheet
|
|
//
|
|
|
|
class CSSRuleListImpl;
|
|
struct ChildSheetListBuilder;
|
|
|
|
// CID for the nsCSSStyleSheet class
|
|
// ca926f30-2a7e-477e-8467-803fb32af20a
|
|
#define NS_CSS_STYLE_SHEET_IMPL_CID \
|
|
{ 0xca926f30, 0x2a7e, 0x477e, \
|
|
{ 0x84, 0x67, 0x80, 0x3f, 0xb3, 0x2a, 0xf2, 0x0a } }
|
|
|
|
|
|
class nsCSSStyleSheet MOZ_FINAL : public nsIStyleSheet,
|
|
public nsIDOMCSSStyleSheet,
|
|
public nsICSSLoaderObserver
|
|
{
|
|
public:
|
|
nsCSSStyleSheet(mozilla::CORSMode aCORSMode);
|
|
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsCSSStyleSheet,
|
|
nsIStyleSheet)
|
|
|
|
NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_SHEET_IMPL_CID)
|
|
|
|
// nsIStyleSheet interface
|
|
virtual nsIURI* GetSheetURI() const;
|
|
virtual nsIURI* GetBaseURI() const MOZ_OVERRIDE;
|
|
virtual void GetTitle(nsString& aTitle) const MOZ_OVERRIDE;
|
|
virtual void GetType(nsString& aType) const MOZ_OVERRIDE;
|
|
virtual bool HasRules() const MOZ_OVERRIDE;
|
|
virtual bool IsApplicable() const MOZ_OVERRIDE;
|
|
virtual void SetEnabled(bool aEnabled) MOZ_OVERRIDE;
|
|
virtual bool IsComplete() const MOZ_OVERRIDE;
|
|
virtual void SetComplete() MOZ_OVERRIDE;
|
|
virtual nsIStyleSheet* GetParentSheet() const MOZ_OVERRIDE; // may be null
|
|
virtual nsIDocument* GetOwningDocument() const MOZ_OVERRIDE; // may be null
|
|
virtual void SetOwningDocument(nsIDocument* aDocument) MOZ_OVERRIDE;
|
|
|
|
// Find the ID of the owner inner window.
|
|
uint64_t FindOwningWindowInnerID() const;
|
|
#ifdef DEBUG
|
|
virtual void List(FILE* out = stdout, int32_t aIndent = 0) const MOZ_OVERRIDE;
|
|
#endif
|
|
|
|
void AppendStyleSheet(nsCSSStyleSheet* aSheet);
|
|
void InsertStyleSheetAt(nsCSSStyleSheet* aSheet, int32_t aIndex);
|
|
|
|
// XXX do these belong here or are they generic?
|
|
void PrependStyleRule(mozilla::css::Rule* aRule);
|
|
void AppendStyleRule(mozilla::css::Rule* aRule);
|
|
void ReplaceStyleRule(mozilla::css::Rule* aOld, mozilla::css::Rule* aNew);
|
|
|
|
int32_t StyleRuleCount() const;
|
|
nsresult GetStyleRuleAt(int32_t aIndex, mozilla::css::Rule*& aRule) const;
|
|
|
|
nsresult DeleteRuleFromGroup(mozilla::css::GroupRule* aGroup, uint32_t aIndex);
|
|
nsresult InsertRuleIntoGroup(const nsAString& aRule, mozilla::css::GroupRule* aGroup, uint32_t aIndex, uint32_t* _retval);
|
|
nsresult ReplaceRuleInGroup(mozilla::css::GroupRule* aGroup, mozilla::css::Rule* aOld, mozilla::css::Rule* aNew);
|
|
|
|
int32_t StyleSheetCount() const;
|
|
|
|
/**
|
|
* SetURIs must be called on all sheets before parsing into them.
|
|
* SetURIs may only be called while the sheet is 1) incomplete and 2)
|
|
* has no rules in it
|
|
*/
|
|
void SetURIs(nsIURI* aSheetURI, nsIURI* aOriginalSheetURI, nsIURI* aBaseURI);
|
|
|
|
/**
|
|
* SetPrincipal should be called on all sheets before parsing into them.
|
|
* This can only be called once with a non-null principal. Calling this with
|
|
* a null pointer is allowed and is treated as a no-op.
|
|
*/
|
|
void SetPrincipal(nsIPrincipal* aPrincipal);
|
|
|
|
// Principal() never returns a null pointer.
|
|
nsIPrincipal* Principal() const { return mInner->mPrincipal; }
|
|
|
|
// The document this style sheet is associated with. May be null
|
|
nsIDocument* GetDocument() const { return mDocument; }
|
|
|
|
void SetTitle(const nsAString& aTitle) { mTitle = aTitle; }
|
|
void SetMedia(nsMediaList* aMedia);
|
|
void SetOwningNode(nsIDOMNode* aOwningNode) { mOwningNode = aOwningNode; /* Not ref counted */ }
|
|
|
|
void SetOwnerRule(mozilla::css::ImportRule* aOwnerRule) { mOwnerRule = aOwnerRule; /* Not ref counted */ }
|
|
mozilla::css::ImportRule* GetOwnerRule() const { return mOwnerRule; }
|
|
|
|
nsXMLNameSpaceMap* GetNameSpaceMap() const { return mInner->mNameSpaceMap; }
|
|
|
|
already_AddRefed<nsCSSStyleSheet> Clone(nsCSSStyleSheet* aCloneParent,
|
|
mozilla::css::ImportRule* aCloneOwnerRule,
|
|
nsIDocument* aCloneDocument,
|
|
nsIDOMNode* aCloneOwningNode) const;
|
|
|
|
bool IsModified() const { return mDirty; }
|
|
|
|
void SetModifiedByChildRule() {
|
|
NS_ASSERTION(mDirty,
|
|
"sheet must be marked dirty before handing out child rules");
|
|
DidDirty();
|
|
}
|
|
|
|
nsresult AddRuleProcessor(nsCSSRuleProcessor* aProcessor);
|
|
nsresult DropRuleProcessor(nsCSSRuleProcessor* aProcessor);
|
|
|
|
/**
|
|
* Like the DOM insertRule() method, but doesn't do any security checks
|
|
*/
|
|
nsresult InsertRuleInternal(const nsAString& aRule,
|
|
uint32_t aIndex, uint32_t* aReturn);
|
|
|
|
/* Get the URI this sheet was originally loaded from, if any. Can
|
|
return null */
|
|
virtual nsIURI* GetOriginalURI() const;
|
|
|
|
// nsICSSLoaderObserver interface
|
|
NS_IMETHOD StyleSheetLoaded(nsCSSStyleSheet* aSheet, bool 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 true
|
|
// on success and false on allocation failure.
|
|
bool AppendAllChildSheets(nsTArray<nsCSSStyleSheet*>& aArray);
|
|
|
|
bool UseForPresentation(nsPresContext* aPresContext,
|
|
nsMediaQueryResultCacheKey& aKey) const;
|
|
|
|
nsresult ParseSheet(const nsAString& aInput);
|
|
|
|
// 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 bool RebuildChildList(mozilla::css::Rule* aRule, void* aBuilder);
|
|
|
|
size_t SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const MOZ_OVERRIDE;
|
|
|
|
// Get this style sheet's CORS mode
|
|
mozilla::CORSMode GetCORSMode() const { return mInner->mCORSMode; }
|
|
|
|
private:
|
|
nsCSSStyleSheet(const nsCSSStyleSheet& aCopy,
|
|
nsCSSStyleSheet* aParentToUse,
|
|
mozilla::css::ImportRule* aOwnerRuleToUse,
|
|
nsIDocument* aDocumentToUse,
|
|
nsIDOMNode* aOwningNodeToUse);
|
|
|
|
nsCSSStyleSheet(const nsCSSStyleSheet& aCopy) MOZ_DELETE;
|
|
nsCSSStyleSheet& operator=(const nsCSSStyleSheet& aCopy) MOZ_DELETE;
|
|
|
|
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
|
|
// UniversalXPConnect or if access is allowed by CORS. In the latter case,
|
|
// it will set the principal of the inner to the subject principal.
|
|
nsresult SubjectSubsumesInnerPrincipal();
|
|
|
|
// Add the namespace mapping from this @namespace rule to our namespace map
|
|
nsresult RegisterNamespaceRule(mozilla::css::Rule* aRule);
|
|
|
|
// Drop our reference to mRuleCollection
|
|
void DropRuleCollection();
|
|
|
|
// Drop our reference to mMedia
|
|
void DropMedia();
|
|
|
|
// Unlink our inner, if needed, for cycle collection
|
|
void UnlinkInner();
|
|
// Traverse our inner, if needed, for cycle collection
|
|
void TraverseInner(nsCycleCollectionTraversalCallback &);
|
|
|
|
protected:
|
|
nsString mTitle;
|
|
nsRefPtr<nsMediaList> mMedia;
|
|
nsRefPtr<nsCSSStyleSheet> mNext;
|
|
nsCSSStyleSheet* mParent; // weak ref
|
|
mozilla::css::ImportRule* mOwnerRule; // weak ref
|
|
|
|
CSSRuleListImpl* mRuleCollection;
|
|
nsIDocument* mDocument; // weak ref; parents maintain this for their children
|
|
nsIDOMNode* mOwningNode; // weak ref
|
|
bool mDisabled;
|
|
bool mDirty; // has been modified
|
|
|
|
nsCSSStyleSheetInner* mInner;
|
|
|
|
nsAutoTArray<nsCSSRuleProcessor*, 8>* mRuleProcessors;
|
|
|
|
friend class nsMediaList;
|
|
friend class nsCSSRuleProcessor;
|
|
friend struct ChildSheetListBuilder;
|
|
};
|
|
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(nsCSSStyleSheet, NS_CSS_STYLE_SHEET_IMPL_CID)
|
|
|
|
#endif /* !defined(nsCSSStyleSheet_h_) */
|