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128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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// vim:cindent:ts=2:et:sw=2:
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Foundation code.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2008
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* John Daggett <jdaggett@mozilla.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* code for loading in @font-face defined font data */
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#ifndef nsFontFaceLoader_h_
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#define nsFontFaceLoader_h_
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#include "nsCOMPtr.h"
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#include "nsIStreamLoader.h"
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#include "nsIURI.h"
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#include "nsIChannel.h"
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#include "nsITimer.h"
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#include "gfxUserFontSet.h"
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#include "nsHashKeys.h"
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#include "nsTHashtable.h"
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class nsIRequest;
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class nsISupports;
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class nsPresContext;
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class nsIPrincipal;
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class nsFontFaceLoader;
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// nsUserFontSet - defines the loading mechanism for downloadable fonts
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class nsUserFontSet : public gfxUserFontSet
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{
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public:
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nsUserFontSet(nsPresContext *aContext);
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~nsUserFontSet();
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// Called when this font set is no longer associated with a presentation.
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void Destroy();
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// starts loading process, creating and initializing a nsFontFaceLoader obj
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// returns whether load process successfully started or not
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nsresult StartLoad(gfxFontEntry *aFontToLoad,
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const gfxFontFaceSrc *aFontFaceSrc);
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// Called by nsFontFaceLoader when the loader has completed normally.
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// It's removed from the mLoaders set.
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void RemoveLoader(nsFontFaceLoader *aLoader);
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nsPresContext *GetPresContext() { return mPresContext; }
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protected:
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nsPresContext *mPresContext; // weak reference
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// Set of all loaders pointing to us. These are not strong pointers,
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// but that's OK because nsFontFaceLoader always calls RemoveLoader on
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// us before it dies (unless we die first).
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nsTHashtable< nsPtrHashKey<nsFontFaceLoader> > mLoaders;
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};
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class nsFontFaceLoader : public nsIStreamLoaderObserver
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{
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public:
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nsFontFaceLoader(gfxFontEntry *aFontToLoad, nsIURI *aFontURI,
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nsUserFontSet *aFontSet, nsIChannel *aChannel);
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virtual ~nsFontFaceLoader();
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NS_DECL_ISUPPORTS
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NS_DECL_NSISTREAMLOADEROBSERVER
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// initiate the load
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nsresult Init();
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// cancel the load and remove its reference to mFontSet
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void Cancel();
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void DropChannel() { mChannel = nsnull; }
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void StartedLoading(nsIStreamLoader *aStreamLoader);
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static void LoadTimerCallback(nsITimer *aTimer, void *aClosure);
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static nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
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nsIURI* aTargetURI,
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nsISupports* aContext);
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private:
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nsRefPtr<gfxFontEntry> mFontEntry;
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nsCOMPtr<nsIURI> mFontURI;
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nsRefPtr<nsUserFontSet> mFontSet;
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nsCOMPtr<nsIChannel> mChannel;
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nsCOMPtr<nsITimer> mLoadTimer;
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nsIStreamLoader *mStreamLoader;
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};
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#endif /* !defined(nsFontFaceLoader_h_) */
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