layout/style/nsFontFaceLoader.h

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   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/
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  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
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  15  *
  16  * The Original Code is Mozilla Foundation code.
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  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.
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  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"),
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  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 "nsIPresShell.h"
  47 #include "nsIStreamLoader.h"
  48 #include "nsIURI.h"
  49 #include "gfxUserFontSet.h"
  50
  51 class nsIRequest;
  52 class nsISupports;
  53 class nsIPresShell;
  54 class nsPresContext;
  55 class nsIPrincipal;
  56
  57 class nsFontFaceLoader : public nsIStreamLoaderObserver
  58 {
  59 public:
  60
  61   nsFontFaceLoader(gfxFontEntry *aFontToLoad, nsIURI *aFontURI,
  62                    nsIPresShell *aShell);
  63   virtual ~nsFontFaceLoader();
  64
  65   NS_DECL_ISUPPORTS
  66   NS_DECL_NSISTREAMLOADEROBSERVER
  67
  68   // initiate the load
  69   nsresult Init();
  70
  71   static nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
  72                                    nsIURI* aTargetURI,
  73                                    nsISupports* aContext);
  74
  75 private:
  76
  77   nsRefPtr<gfxFontEntry>  mFontEntry;
  78   nsCOMPtr<nsIURI>        mFontURI;
  79   nsCOMPtr<nsIPresShell>  mShell;
  80 };
  81
  82 // nsUserFontSet - defines the loading mechanism for downloadable fonts
  83
  84 class nsUserFontSet : public gfxUserFontSet
  85 {
  86 public:
  87   nsUserFontSet(nsPresContext *aContext);
  88   ~nsUserFontSet();
  89
  90   // starts loading process, creating and initializing a nsFontFaceLoader obj
  91   // returns whether load process successfully started or not
  92   nsresult StartLoad(gfxFontEntry *aFontToLoad,
  93                      const gfxFontFaceSrc *aFontFaceSrc);
  94 protected:
  95   nsPresContext *mPresContext;  // weak reference
  96 };
  97
  98 #endif /* !defined(nsFontFaceLoader_h_) */