LCOV - code coverage report
Current view: directory - layout/style - nsFontFaceLoader.h (source / functions) Found Hit Coverage
Test: app.info Lines: 3 0 0.0 %
Date: 2012-06-02 Functions: 5 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : // vim:cindent:ts=2:et:sw=2:
       3                 : /* ***** BEGIN LICENSE BLOCK *****
       4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       5                 :  *
       6                 :  * The contents of this file are subject to the Mozilla Public License Version
       7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       8                 :  * the License. You may obtain a copy of the License at
       9                 :  * http://www.mozilla.org/MPL/
      10                 :  *
      11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      13                 :  * for the specific language governing rights and limitations under the
      14                 :  * License.
      15                 :  *
      16                 :  * The Original Code is Mozilla Foundation code.
      17                 :  *
      18                 :  * The Initial Developer of the Original Code is
      19                 :  * Mozilla Foundation.
      20                 :  * Portions created by the Initial Developer are Copyright (C) 2008
      21                 :  * the Initial Developer. All Rights Reserved.
      22                 :  *
      23                 :  * Contributor(s):
      24                 :  *   John Daggett <jdaggett@mozilla.com>
      25                 :  *
      26                 :  * Alternatively, the contents of this file may be used under the terms of
      27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      30                 :  * of those above. If you wish to allow use of your version of this file only
      31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      32                 :  * use your version of this file under the terms of the MPL, indicate your
      33                 :  * decision by deleting the provisions above and replace them with the notice
      34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      35                 :  * the provisions above, a recipient may use your version of this file under
      36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      37                 :  *
      38                 :  * ***** END LICENSE BLOCK ***** */
      39                 : 
      40                 : /* code for loading in @font-face defined font data */
      41                 : 
      42                 : #ifndef nsFontFaceLoader_h_
      43                 : #define nsFontFaceLoader_h_
      44                 : 
      45                 : #include "nsCOMPtr.h"
      46                 : #include "nsIStreamLoader.h"
      47                 : #include "nsIURI.h"
      48                 : #include "nsIChannel.h"
      49                 : #include "nsITimer.h"
      50                 : #include "gfxUserFontSet.h"
      51                 : #include "nsHashKeys.h"
      52                 : #include "nsTHashtable.h"
      53                 : #include "nsCSSRules.h"
      54                 : 
      55                 : class nsIRequest;
      56                 : class nsISupports;
      57                 : class nsPresContext;
      58                 : class nsIPrincipal;
      59                 : 
      60                 : class nsFontFaceLoader;
      61                 : class nsCSSFontFaceRule;
      62                 : 
      63                 : // nsUserFontSet - defines the loading mechanism for downloadable fonts
      64                 : class nsUserFontSet : public gfxUserFontSet
      65                 : {
      66                 : public:
      67                 :   nsUserFontSet(nsPresContext *aContext);
      68                 :   ~nsUserFontSet();
      69                 : 
      70                 :   // Called when this font set is no longer associated with a presentation.
      71                 :   void Destroy();
      72                 : 
      73                 :   // starts loading process, creating and initializing a nsFontFaceLoader obj
      74                 :   // returns whether load process successfully started or not
      75                 :   nsresult StartLoad(gfxProxyFontEntry *aFontToLoad, 
      76                 :                      const gfxFontFaceSrc *aFontFaceSrc);
      77                 : 
      78                 :   // Called by nsFontFaceLoader when the loader has completed normally.
      79                 :   // It's removed from the mLoaders set.
      80                 :   void RemoveLoader(nsFontFaceLoader *aLoader);
      81                 : 
      82                 :   bool UpdateRules(const nsTArray<nsFontFaceRuleContainer>& aRules);
      83                 : 
      84               0 :   nsPresContext *GetPresContext() { return mPresContext; }
      85                 : 
      86                 :   virtual void ReplaceFontEntry(gfxProxyFontEntry *aProxy,
      87                 :                                 gfxFontEntry *aFontEntry);
      88                 : 
      89                 :   nsCSSFontFaceRule *FindRuleForEntry(gfxFontEntry *aFontEntry);
      90                 : 
      91                 : protected:
      92                 :   // The font-set keeps track of the collection of rules, and their
      93                 :   // corresponding font entries (whether proxies or real entries),
      94                 :   // so that we can update the set without having to throw away
      95                 :   // all the existing fonts.
      96               0 :   struct FontFaceRuleRecord {
      97                 :     nsRefPtr<gfxFontEntry>       mFontEntry;
      98                 :     nsFontFaceRuleContainer      mContainer;
      99                 :   };
     100                 : 
     101                 :   void InsertRule(nsCSSFontFaceRule *aRule, PRUint8 aSheetType,
     102                 :                   nsTArray<FontFaceRuleRecord>& oldRules,
     103                 :                   bool& aFontSetModified);
     104                 : 
     105                 :   virtual nsresult LogMessage(gfxProxyFontEntry *aProxy,
     106                 :                               const char *aMessage,
     107                 :                               PRUint32 aFlags = nsIScriptError::errorFlag,
     108                 :                               nsresult aStatus = 0);
     109                 : 
     110                 :   nsPresContext *mPresContext;  // weak reference
     111                 : 
     112                 :   // Set of all loaders pointing to us. These are not strong pointers,
     113                 :   // but that's OK because nsFontFaceLoader always calls RemoveLoader on
     114                 :   // us before it dies (unless we die first).
     115                 :   nsTHashtable< nsPtrHashKey<nsFontFaceLoader> > mLoaders;
     116                 : 
     117                 :   nsTArray<FontFaceRuleRecord>   mRules;
     118                 : };
     119                 : 
     120                 : class nsFontFaceLoader : public nsIStreamLoaderObserver
     121                 : {
     122                 : public:
     123                 : 
     124                 :   nsFontFaceLoader(gfxProxyFontEntry *aFontToLoad, nsIURI *aFontURI, 
     125                 :                    nsUserFontSet *aFontSet, nsIChannel *aChannel);
     126                 :   virtual ~nsFontFaceLoader();
     127                 : 
     128                 :   NS_DECL_ISUPPORTS
     129                 :   NS_DECL_NSISTREAMLOADEROBSERVER 
     130                 : 
     131                 :   // initiate the load
     132                 :   nsresult Init();
     133                 :   // cancel the load and remove its reference to mFontSet
     134                 :   void Cancel();
     135                 : 
     136               0 :   void DropChannel() { mChannel = nsnull; }
     137                 : 
     138                 :   void StartedLoading(nsIStreamLoader *aStreamLoader);
     139                 : 
     140                 :   static void LoadTimerCallback(nsITimer *aTimer, void *aClosure);
     141                 : 
     142                 :   static nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
     143                 :                                    nsIURI* aTargetURI,
     144                 :                                    nsISupports* aContext);
     145                 : 
     146                 : private:
     147                 :   nsRefPtr<gfxProxyFontEntry>  mFontEntry;
     148                 :   nsRefPtr<gfxFontFamily>      mFontFamily;
     149                 :   nsCOMPtr<nsIURI>        mFontURI;
     150                 :   nsRefPtr<nsUserFontSet> mFontSet;
     151                 :   nsCOMPtr<nsIChannel>    mChannel;
     152                 :   nsCOMPtr<nsITimer>      mLoadTimer;
     153                 : 
     154                 :   nsIStreamLoader        *mStreamLoader;
     155                 : };
     156                 : 
     157                 : #endif /* !defined(nsFontFaceLoader_h_) */

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