LCOV - code coverage report
Current view: directory - objdir/dist/include/mozilla/css - Loader.h (source / functions) Found Hit Coverage
Test: app.info Lines: 32 5 15.6 %
Date: 2012-06-02 Functions: 13 4 30.8 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1999
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : /* loading of CSS style sheets using the network APIs */
      39                 : 
      40                 : #ifndef mozilla_css_Loader_h
      41                 : #define mozilla_css_Loader_h
      42                 : 
      43                 : #include "nsIPrincipal.h"
      44                 : #include "nsAString.h"
      45                 : #include "nsAutoPtr.h"
      46                 : #include "nsCompatibility.h"
      47                 : #include "nsDataHashtable.h"
      48                 : #include "nsInterfaceHashtable.h"
      49                 : #include "nsRefPtrHashtable.h"
      50                 : #include "nsTArray.h"
      51                 : #include "nsTObserverArray.h"
      52                 : #include "nsURIHashKey.h"
      53                 : 
      54                 : class nsIAtom;
      55                 : class nsICSSLoaderObserver;
      56                 : class nsCSSStyleSheet;
      57                 : class nsIContent;
      58                 : class nsIDocument;
      59                 : class nsCSSParser;
      60                 : class nsMediaList;
      61                 : class nsIStyleSheetLinkingElement;
      62                 : 
      63                 : namespace mozilla {
      64                 : 
      65                 : class URIAndPrincipalHashKey : public nsURIHashKey
      66                 : {
      67                 : public:
      68                 :   typedef URIAndPrincipalHashKey* KeyType;
      69                 :   typedef const URIAndPrincipalHashKey* KeyTypePointer;
      70                 : 
      71               0 :   URIAndPrincipalHashKey(const URIAndPrincipalHashKey* aKey)
      72               0 :     : nsURIHashKey(aKey->mKey), mPrincipal(aKey->mPrincipal)
      73                 :   {
      74               0 :     MOZ_COUNT_CTOR(URIAndPrincipalHashKey);
      75               0 :   }
      76               0 :   URIAndPrincipalHashKey(nsIURI* aURI, nsIPrincipal* aPrincipal)
      77               0 :     : nsURIHashKey(aURI), mPrincipal(aPrincipal)
      78                 :   {
      79               0 :     MOZ_COUNT_CTOR(URIAndPrincipalHashKey);
      80               0 :   }
      81                 :   URIAndPrincipalHashKey(const URIAndPrincipalHashKey& toCopy)
      82                 :     : nsURIHashKey(toCopy), mPrincipal(toCopy.mPrincipal)
      83                 :   {
      84                 :     MOZ_COUNT_CTOR(URIAndPrincipalHashKey);
      85                 :   }
      86               0 :   ~URIAndPrincipalHashKey()
      87               0 :   {
      88               0 :     MOZ_COUNT_DTOR(URIAndPrincipalHashKey);
      89               0 :   }
      90                 : 
      91               0 :   URIAndPrincipalHashKey* GetKey() const {
      92               0 :     return const_cast<URIAndPrincipalHashKey*>(this);
      93                 :   }
      94                 :   const URIAndPrincipalHashKey* GetKeyPointer() const { return this; }
      95                 : 
      96               0 :   bool KeyEquals(const URIAndPrincipalHashKey* aKey) const {
      97               0 :     if (!nsURIHashKey::KeyEquals(aKey->mKey)) {
      98               0 :       return false;
      99                 :     }
     100                 : 
     101               0 :     if (!mPrincipal != !aKey->mPrincipal) {
     102                 :       // One or the other has a principal, but not both... not equal
     103               0 :       return false;
     104                 :     }
     105                 : 
     106                 :     bool eq;
     107               0 :     return !mPrincipal ||
     108               0 :       (NS_SUCCEEDED(mPrincipal->Equals(aKey->mPrincipal, &eq)) && eq);
     109                 :   }
     110                 : 
     111                 :   static const URIAndPrincipalHashKey*
     112               0 :   KeyToPointer(URIAndPrincipalHashKey* aKey) { return aKey; }
     113               0 :   static PLDHashNumber HashKey(const URIAndPrincipalHashKey* aKey) {
     114               0 :     return nsURIHashKey::HashKey(aKey->mKey);
     115                 :   }
     116                 : 
     117                 :   enum { ALLOW_MEMMOVE = true };
     118                 : 
     119                 : protected:
     120                 :   nsCOMPtr<nsIPrincipal> mPrincipal;
     121                 : };
     122                 : 
     123                 : 
     124                 : 
     125                 : namespace css {
     126                 : 
     127                 : class SheetLoadData;
     128                 : class ImportRule;
     129                 : 
     130                 : /***********************************************************************
     131                 :  * Enum that describes the state of the sheet returned by CreateSheet. *
     132                 :  ***********************************************************************/
     133                 : enum StyleSheetState {
     134                 :   eSheetStateUnknown = 0,
     135                 :   eSheetNeedsParser,
     136                 :   eSheetPending,
     137                 :   eSheetLoading,
     138                 :   eSheetComplete
     139                 : };
     140                 : 
     141                 : class Loader {
     142                 : public:
     143                 :   Loader();
     144                 :   Loader(nsIDocument*);
     145                 :   ~Loader();
     146                 : 
     147                 :   // This isn't a COM class but it's reference-counted like one.
     148                 :   NS_IMETHOD_(nsrefcnt) AddRef();
     149                 :   NS_IMETHOD_(nsrefcnt) Release();
     150                 : 
     151                 :   void DropDocumentReference(); // notification that doc is going away
     152                 : 
     153            1975 :   void SetCompatibilityMode(nsCompatibility aCompatMode)
     154            1975 :   { mCompatMode = aCompatMode; }
     155             110 :   nsCompatibility GetCompatibilityMode() { return mCompatMode; }
     156                 :   nsresult SetPreferredSheet(const nsAString& aTitle);
     157                 : 
     158                 :   // XXXbz sort out what the deal is with events!  When should they fire?
     159                 : 
     160                 :   /**
     161                 :    * Load an inline style sheet.  If a successful result is returned and
     162                 :    * *aCompleted is false, then aObserver is guaranteed to be notified
     163                 :    * asynchronously once the sheet is marked complete.  If an error is
     164                 :    * returned, or if *aCompleted is true, aObserver will not be notified.  In
     165                 :    * addition to parsing the sheet, this method will insert it into the
     166                 :    * stylesheet list of this CSSLoader's document.
     167                 :    *
     168                 :    * @param aElement the element linking to the stylesheet.  This must not be
     169                 :    *                 null and must implement nsIStyleSheetLinkingElement.
     170                 :    * @param aBuffer the stylesheet data
     171                 :    * @param aLineNumber the line number at which the stylesheet data started.
     172                 :    * @param aTitle the title of the sheet.
     173                 :    * @param aMedia the media string for the sheet.
     174                 :    * @param aObserver the observer to notify when the load completes.
     175                 :    *        May be null.
     176                 :    * @param [out] aCompleted whether parsing of the sheet completed.
     177                 :    * @param [out] aIsAlternate whether the stylesheet ended up being an
     178                 :    *        alternate sheet.
     179                 :    */
     180                 :   nsresult LoadInlineStyle(nsIContent* aElement,
     181                 :                            const nsAString& aBuffer,
     182                 :                            PRUint32 aLineNumber,
     183                 :                            const nsAString& aTitle,
     184                 :                            const nsAString& aMedia,
     185                 :                            nsICSSLoaderObserver* aObserver,
     186                 :                            bool* aCompleted,
     187                 :                            bool* aIsAlternate);
     188                 : 
     189                 :   /**
     190                 :    * Load a linked (document) stylesheet.  If a successful result is returned,
     191                 :    * aObserver is guaranteed to be notified asynchronously once the sheet is
     192                 :    * loaded and marked complete.  If an error is returned, aObserver will not
     193                 :    * be notified.  In addition to loading the sheet, this method will insert it
     194                 :    * into the stylesheet list of this CSSLoader's document.
     195                 :    *
     196                 :    * @param aElement the element linking to the the stylesheet.  May be null.
     197                 :    * @param aURL the URL of the sheet.
     198                 :    * @param aTitle the title of the sheet.
     199                 :    * @param aMedia the media string for the sheet.
     200                 :    * @param aHasAlternateRel whether the rel for this link included
     201                 :    *        "alternate".
     202                 :    * @param aObserver the observer to notify when the load completes.
     203                 :    *                  May be null.
     204                 :    * @param [out] aIsAlternate whether the stylesheet actually ended up beinga
     205                 :    *        an alternate sheet.  Note that this need not match
     206                 :    *        aHasAlternateRel.
     207                 :    */
     208                 :   nsresult LoadStyleLink(nsIContent* aElement,
     209                 :                          nsIURI* aURL,
     210                 :                          const nsAString& aTitle,
     211                 :                          const nsAString& aMedia,
     212                 :                          bool aHasAlternateRel,
     213                 :                          nsICSSLoaderObserver* aObserver,
     214                 :                          bool* aIsAlternate);
     215                 : 
     216                 :   /**
     217                 :    * Load a child (@import-ed) style sheet.  In addition to loading the sheet,
     218                 :    * this method will insert it into the child sheet list of aParentSheet.  If
     219                 :    * there is no sheet currently being parsed and the child sheet is not
     220                 :    * complete when this method returns, then when the child sheet becomes
     221                 :    * complete aParentSheet will be QIed to nsICSSLoaderObserver and
     222                 :    * asynchronously notified, just like for LoadStyleLink.  Note that if the
     223                 :    * child sheet is already complete when this method returns, no
     224                 :    * nsICSSLoaderObserver notification will be sent.
     225                 :    *
     226                 :    * @param aParentSheet the parent of this child sheet
     227                 :    * @param aURL the URL of the child sheet
     228                 :    * @param aMedia the already-parsed media list for the child sheet
     229                 :    * @param aRule the @import rule importing this child.  This is used to
     230                 :    *              properly order the child sheet list of aParentSheet.
     231                 :    */
     232                 :   nsresult LoadChildSheet(nsCSSStyleSheet* aParentSheet,
     233                 :                           nsIURI* aURL,
     234                 :                           nsMediaList* aMedia,
     235                 :                           ImportRule* aRule);
     236                 : 
     237                 :   /**
     238                 :    * Synchronously load and return the stylesheet at aURL.  Any child sheets
     239                 :    * will also be loaded synchronously.  Note that synchronous loads over some
     240                 :    * protocols may involve spinning up a new event loop, so use of this method
     241                 :    * does NOT guarantee not receiving any events before the sheet loads.  This
     242                 :    * method can be used to load sheets not associated with a document.
     243                 :    *
     244                 :    * @param aURL the URL of the sheet to load
     245                 :    * @param aEnableUnsafeRules whether unsafe rules are enabled for this
     246                 :    * sheet load
     247                 :    * Unsafe rules are rules that can violate key Gecko invariants if misused.
     248                 :    * In particular, most anonymous box pseudoelements must be very carefully
     249                 :    * styled or we will have severe problems. Therefore unsafe rules should
     250                 :    * never be enabled for stylesheets controlled by untrusted sites; preferably
     251                 :    * unsafe rules should only be enabled for agent sheets.
     252                 :    * @param aUseSystemPrincipal if true, give the resulting sheet the system
     253                 :    * principal no matter where it's being loaded from.
     254                 :    * @param [out] aSheet the loaded, complete sheet.
     255                 :    *
     256                 :    * NOTE: At the moment, this method assumes the sheet will be UTF-8, but
     257                 :    * ideally it would allow arbitrary encodings.  Callers should NOT depend on
     258                 :    * non-UTF8 sheets being treated as UTF-8 by this method.
     259                 :    *
     260                 :    * NOTE: A successful return from this method doesn't indicate anything about
     261                 :    * whether the data could be parsed as CSS and doesn't indicate anything
     262                 :    * about the status of child sheets of the returned sheet.
     263                 :    */
     264                 :   nsresult LoadSheetSync(nsIURI* aURL, bool aEnableUnsafeRules,
     265                 :                          bool aUseSystemPrincipal,
     266                 :                          nsCSSStyleSheet** aSheet);
     267                 : 
     268                 :   /**
     269                 :    * As above, but aUseSystemPrincipal and aEnableUnsafeRules are assumed false.
     270                 :    */
     271               0 :   nsresult LoadSheetSync(nsIURI* aURL, nsCSSStyleSheet** aSheet) {
     272               0 :     return LoadSheetSync(aURL, false, false, aSheet);
     273                 :   }
     274                 : 
     275                 :   /**
     276                 :    * Asynchronously load the stylesheet at aURL.  If a successful result is
     277                 :    * returned, aObserver is guaranteed to be notified asynchronously once the
     278                 :    * sheet is loaded and marked complete.  This method can be used to load
     279                 :    * sheets not associated with a document.
     280                 :    *
     281                 :    * @param aURL the URL of the sheet to load
     282                 :    * @param aOriginPrincipal the principal to use for security checks.  This
     283                 :    *                         can be null to indicate that these checks should
     284                 :    *                         be skipped.
     285                 :    * @param aCharset the encoding to use for converting the sheet data
     286                 :    *        from bytes to Unicode.  May be empty to indicate that the
     287                 :    *        charset of the CSSLoader's document should be used.  This
     288                 :    *        is only used if neither the network transport nor the
     289                 :    *        sheet itself indicate an encoding.
     290                 :    * @param aObserver the observer to notify when the load completes.
     291                 :    *                  Must not be null.
     292                 :    * @param [out] aSheet the sheet to load. Note that the sheet may well
     293                 :    *              not be loaded by the time this method returns.
     294                 :    */
     295                 :   nsresult LoadSheet(nsIURI* aURL,
     296                 :                      nsIPrincipal* aOriginPrincipal,
     297                 :                      const nsCString& aCharset,
     298                 :                      nsICSSLoaderObserver* aObserver,
     299                 :                      nsCSSStyleSheet** aSheet);
     300                 : 
     301                 :   /**
     302                 :    * Same as above, to be used when the caller doesn't care about the
     303                 :    * not-yet-loaded sheet.
     304                 :    */
     305                 :   nsresult LoadSheet(nsIURI* aURL,
     306                 :                      nsIPrincipal* aOriginPrincipal,
     307                 :                      const nsCString& aCharset,
     308                 :                      nsICSSLoaderObserver* aObserver);
     309                 : 
     310                 :   /**
     311                 :    * Stop loading all sheets.  All nsICSSLoaderObservers involved will be
     312                 :    * notified with NS_BINDING_ABORTED as the status, possibly synchronously.
     313                 :    */
     314                 :   nsresult Stop(void);
     315                 : 
     316                 :   /**
     317                 :    * nsresult Loader::StopLoadingSheet(nsIURI* aURL), which notifies the
     318                 :    * nsICSSLoaderObserver with NS_BINDING_ABORTED, was removed in Bug 556446.
     319                 :    * It can be found in revision 2c44a32052ad.
     320                 :    */
     321                 : 
     322                 :   /**
     323                 :    * Whether the loader is enabled or not.
     324                 :    * When disabled, processing of new styles is disabled and an attempt
     325                 :    * to do so will fail with a return code of
     326                 :    * NS_ERROR_NOT_AVAILABLE. Note that this DOES NOT disable
     327                 :    * currently loading styles or already processed styles.
     328                 :    */
     329              62 :   bool GetEnabled() { return mEnabled; }
     330            1038 :   void SetEnabled(bool aEnabled) { mEnabled = aEnabled; }
     331                 : 
     332                 :   /**
     333                 :    * Get the document we live for. May return null.
     334                 :    */
     335               0 :   nsIDocument* GetDocument() const { return mDocument; }
     336                 : 
     337                 :   /**
     338                 :    * Return true if this loader has pending loads (ones that would send
     339                 :    * notifications to an nsICSSLoaderObserver attached to this loader).
     340                 :    * If called from inside nsICSSLoaderObserver::StyleSheetLoaded, this will
     341                 :    * return false if and only if that is the last StyleSheetLoaded
     342                 :    * notification the CSSLoader knows it's going to send.  In other words, if
     343                 :    * two sheets load at once (via load coalescing, e.g.), HasPendingLoads()
     344                 :    * will return true during notification for the first one, and false
     345                 :    * during notification for the second one.
     346                 :    */
     347                 :   bool HasPendingLoads();
     348                 : 
     349                 :   /**
     350                 :    * Add an observer to this loader.  The observer will be notified
     351                 :    * for all loads that would have notified their own observers (even
     352                 :    * if those loads don't have observers attached to them).
     353                 :    * Load-specific observers will be notified before generic
     354                 :    * observers.  The loader holds a reference to the observer.
     355                 :    *
     356                 :    * aObserver must not be null.
     357                 :    */
     358                 :   nsresult AddObserver(nsICSSLoaderObserver* aObserver);
     359                 : 
     360                 :   /**
     361                 :    * Remove an observer added via AddObserver.
     362                 :    */
     363                 :   void RemoveObserver(nsICSSLoaderObserver* aObserver);
     364                 : 
     365                 :   // These interfaces are public only for the benefit of static functions
     366                 :   // within nsCSSLoader.cpp.
     367                 : 
     368                 :   // IsAlternate can change our currently selected style set if none
     369                 :   // is selected and aHasAlternateRel is false.
     370                 :   bool IsAlternate(const nsAString& aTitle, bool aHasAlternateRel);
     371                 : 
     372                 :   typedef nsTArray<nsRefPtr<SheetLoadData> > LoadDataArray;
     373                 : 
     374                 : private:
     375                 :   friend class SheetLoadData;
     376                 : 
     377                 :   // Note: null aSourcePrincipal indicates that the content policy and
     378                 :   // CheckLoadURI checks should be skipped.
     379                 :   nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
     380                 :                             nsIURI* aTargetURI,
     381                 :                             nsISupports* aContext);
     382                 : 
     383                 : 
     384                 :   // For inline style, the aURI param is null, but the aLinkingContent
     385                 :   // must be non-null then.  The loader principal must never be null
     386                 :   // if aURI is not null.
     387                 :   // *aIsAlternate is set based on aTitle and aHasAlternateRel.
     388                 :   nsresult CreateSheet(nsIURI* aURI,
     389                 :                        nsIContent* aLinkingContent,
     390                 :                        nsIPrincipal* aLoaderPrincipal,
     391                 :                        bool aSyncLoad,
     392                 :                        bool aHasAlternateRel,
     393                 :                        const nsAString& aTitle,
     394                 :                        StyleSheetState& aSheetState,
     395                 :                        bool *aIsAlternate,
     396                 :                        nsCSSStyleSheet** aSheet);
     397                 : 
     398                 :   // Pass in either a media string or the nsMediaList from the
     399                 :   // CSSParser.  Don't pass both.
     400                 :   // This method will set the sheet's enabled state based on isAlternate
     401                 :   nsresult PrepareSheet(nsCSSStyleSheet* aSheet,
     402                 :                         const nsAString& aTitle,
     403                 :                         const nsAString& aMediaString,
     404                 :                         nsMediaList* aMediaList,
     405                 :                         bool isAlternate);
     406                 : 
     407                 :   nsresult InsertSheetInDoc(nsCSSStyleSheet* aSheet,
     408                 :                             nsIContent* aLinkingContent,
     409                 :                             nsIDocument* aDocument);
     410                 : 
     411                 :   nsresult InsertChildSheet(nsCSSStyleSheet* aSheet,
     412                 :                             nsCSSStyleSheet* aParentSheet,
     413                 :                             ImportRule* aParentRule);
     414                 : 
     415                 :   nsresult InternalLoadNonDocumentSheet(nsIURI* aURL,
     416                 :                                         bool aAllowUnsafeRules,
     417                 :                                         bool aUseSystemPrincipal,
     418                 :                                         nsIPrincipal* aOriginPrincipal,
     419                 :                                         const nsCString& aCharset,
     420                 :                                         nsCSSStyleSheet** aSheet,
     421                 :                                         nsICSSLoaderObserver* aObserver);
     422                 : 
     423                 :   // Post a load event for aObserver to be notified about aSheet.  The
     424                 :   // notification will be sent with status NS_OK unless the load event is
     425                 :   // canceled at some point (in which case it will be sent with
     426                 :   // NS_BINDING_ABORTED).  aWasAlternate indicates the state when the load was
     427                 :   // initiated, not the state at some later time.  aURI should be the URI the
     428                 :   // sheet was loaded from (may be null for inline sheets).  aElement is the
     429                 :   // owning element for this sheet.
     430                 :   nsresult PostLoadEvent(nsIURI* aURI,
     431                 :                          nsCSSStyleSheet* aSheet,
     432                 :                          nsICSSLoaderObserver* aObserver,
     433                 :                          bool aWasAlternate,
     434                 :                          nsIStyleSheetLinkingElement* aElement);
     435                 : 
     436                 :   // Start the loads of all the sheets in mPendingDatas
     437                 :   void StartAlternateLoads();
     438                 : 
     439                 :   // Handle an event posted by PostLoadEvent
     440                 :   void HandleLoadEvent(SheetLoadData* aEvent);
     441                 : 
     442                 :   // Note: LoadSheet is responsible for releasing aLoadData and setting the
     443                 :   // sheet to complete on failure.
     444                 :   nsresult LoadSheet(SheetLoadData* aLoadData, StyleSheetState aSheetState);
     445                 : 
     446                 :   // Parse the stylesheet in aLoadData.  The sheet data comes from aInput.
     447                 :   // Set aCompleted to true if the parse finished, false otherwise (e.g. if the
     448                 :   // sheet had an @import).  If aCompleted is true when this returns, then
     449                 :   // ParseSheet also called SheetComplete on aLoadData.
     450                 :   nsresult ParseSheet(const nsAString& aInput,
     451                 :                       SheetLoadData* aLoadData,
     452                 :                       bool& aCompleted);
     453                 : 
     454                 :   // The load of the sheet in aLoadData is done, one way or another.  Do final
     455                 :   // cleanup, including releasing aLoadData.
     456                 :   void SheetComplete(SheetLoadData* aLoadData, nsresult aStatus);
     457                 : 
     458                 :   // The guts of SheetComplete.  This may be called recursively on parent datas
     459                 :   // or datas that had glommed on to a single load.  The array is there so load
     460                 :   // datas whose observers need to be notified can be added to it.
     461                 :   void DoSheetComplete(SheetLoadData* aLoadData, nsresult aStatus,
     462                 :                        LoadDataArray& aDatasToNotify);
     463                 : 
     464                 :   nsRefPtrHashtable<URIAndPrincipalHashKey, nsCSSStyleSheet>
     465                 :                     mCompleteSheets;
     466                 :   nsDataHashtable<URIAndPrincipalHashKey, SheetLoadData*>
     467                 :                     mLoadingDatas; // weak refs
     468                 :   nsDataHashtable<URIAndPrincipalHashKey, SheetLoadData*>
     469                 :                     mPendingDatas; // weak refs
     470                 : 
     471                 :   // We're not likely to have many levels of @import...  But likely to have
     472                 :   // some.  Allocate some storage, what the hell.
     473                 :   nsAutoTArray<SheetLoadData*, 8> mParsingDatas;
     474                 : 
     475                 :   // The array of posted stylesheet loaded events (SheetLoadDatas) we have.
     476                 :   // Note that these are rare.
     477                 :   LoadDataArray     mPostedEvents;
     478                 : 
     479                 :   // Our array of "global" observers
     480                 :   // XXXbz these are strong refs; should we be cycle collecting CSS loaders?
     481                 :   nsTObserverArray<nsCOMPtr<nsICSSLoaderObserver> > mObservers;
     482                 : 
     483                 :   // the load data needs access to the document...
     484                 :   nsIDocument*      mDocument;  // the document we live for
     485                 : 
     486                 :   // Refcounting
     487                 :   nsAutoRefCnt      mRefCnt;
     488                 :   NS_DECL_OWNINGTHREAD
     489                 : 
     490                 :   // Number of datas still waiting to be notified on if we're notifying on a
     491                 :   // whole bunch at once (e.g. in one of the stop methods).  This is used to
     492                 :   // make sure that HasPendingLoads() won't return false until we're notifying
     493                 :   // on the last data we're working with.
     494                 :   PRUint32          mDatasToNotifyOn;
     495                 : 
     496                 :   nsCompatibility   mCompatMode;
     497                 :   nsString          mPreferredSheet;  // title of preferred sheet
     498                 : 
     499                 :   bool              mEnabled; // is enabled to load new styles
     500                 : 
     501                 : #ifdef DEBUG
     502                 :   bool              mSyncCallback;
     503                 : #endif
     504                 : };
     505                 : 
     506                 : } // namespace css
     507                 : } // namespace mozilla
     508                 : 
     509                 : #endif /* mozilla_css_Loader_h */

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