1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsFontFaceLoader.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,140 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +// vim:cindent:ts=2:et:sw=2:
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/* code for loading in @font-face defined font data */
1.11 +
1.12 +#ifndef nsFontFaceLoader_h_
1.13 +#define nsFontFaceLoader_h_
1.14 +
1.15 +#include "mozilla/Attributes.h"
1.16 +#include "nsCOMPtr.h"
1.17 +#include "nsIStreamLoader.h"
1.18 +#include "nsIChannel.h"
1.19 +#include "gfxUserFontSet.h"
1.20 +#include "nsHashKeys.h"
1.21 +#include "nsTHashtable.h"
1.22 +#include "nsCSSRules.h"
1.23 +
1.24 +class nsPresContext;
1.25 +class nsIPrincipal;
1.26 +
1.27 +class nsFontFaceLoader;
1.28 +
1.29 +// nsUserFontSet - defines the loading mechanism for downloadable fonts
1.30 +class nsUserFontSet : public gfxUserFontSet
1.31 +{
1.32 +public:
1.33 + nsUserFontSet(nsPresContext* aContext);
1.34 +
1.35 + // Called when this font set is no longer associated with a presentation.
1.36 + void Destroy();
1.37 +
1.38 + // starts loading process, creating and initializing a nsFontFaceLoader obj
1.39 + // returns whether load process successfully started or not
1.40 + nsresult StartLoad(gfxMixedFontFamily* aFamily,
1.41 + gfxProxyFontEntry* aFontToLoad,
1.42 + const gfxFontFaceSrc* aFontFaceSrc) MOZ_OVERRIDE;
1.43 +
1.44 + // Called by nsFontFaceLoader when the loader has completed normally.
1.45 + // It's removed from the mLoaders set.
1.46 + void RemoveLoader(nsFontFaceLoader* aLoader);
1.47 +
1.48 + bool UpdateRules(const nsTArray<nsFontFaceRuleContainer>& aRules);
1.49 +
1.50 + virtual nsPresContext* GetPresContext() { return mPresContext; }
1.51 +
1.52 + virtual void ReplaceFontEntry(gfxMixedFontFamily* aFamily,
1.53 + gfxProxyFontEntry* aProxy,
1.54 + gfxFontEntry* aFontEntry) MOZ_OVERRIDE;
1.55 +
1.56 + nsCSSFontFaceRule* FindRuleForEntry(gfxFontEntry* aFontEntry);
1.57 +
1.58 +protected:
1.59 + // Protected destructor, to discourage deletion outside of Release()
1.60 + // (since we inherit from refcounted class gfxUserFontSet):
1.61 + ~nsUserFontSet();
1.62 +
1.63 + // The font-set keeps track of the collection of rules, and their
1.64 + // corresponding font entries (whether proxies or real entries),
1.65 + // so that we can update the set without having to throw away
1.66 + // all the existing fonts.
1.67 + struct FontFaceRuleRecord {
1.68 + nsRefPtr<gfxFontEntry> mFontEntry;
1.69 + nsFontFaceRuleContainer mContainer;
1.70 + };
1.71 +
1.72 + void InsertRule(nsCSSFontFaceRule* aRule, uint8_t aSheetType,
1.73 + nsTArray<FontFaceRuleRecord>& oldRules,
1.74 + bool& aFontSetModified);
1.75 +
1.76 + virtual nsresult LogMessage(gfxMixedFontFamily* aFamily,
1.77 + gfxProxyFontEntry* aProxy,
1.78 + const char* aMessage,
1.79 + uint32_t aFlags = nsIScriptError::errorFlag,
1.80 + nsresult aStatus = NS_OK) MOZ_OVERRIDE;
1.81 +
1.82 + virtual nsresult CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc,
1.83 + nsIPrincipal** aPrincipal,
1.84 + bool* aBypassCache) MOZ_OVERRIDE;
1.85 +
1.86 + virtual nsresult SyncLoadFontData(gfxProxyFontEntry* aFontToLoad,
1.87 + const gfxFontFaceSrc* aFontFaceSrc,
1.88 + uint8_t*& aBuffer,
1.89 + uint32_t& aBufferLength) MOZ_OVERRIDE;
1.90 +
1.91 + virtual bool GetPrivateBrowsing() MOZ_OVERRIDE;
1.92 +
1.93 + virtual void DoRebuildUserFontSet() MOZ_OVERRIDE;
1.94 +
1.95 + nsPresContext* mPresContext; // weak reference
1.96 +
1.97 + // Set of all loaders pointing to us. These are not strong pointers,
1.98 + // but that's OK because nsFontFaceLoader always calls RemoveLoader on
1.99 + // us before it dies (unless we die first).
1.100 + nsTHashtable< nsPtrHashKey<nsFontFaceLoader> > mLoaders;
1.101 +
1.102 + nsTArray<FontFaceRuleRecord> mRules;
1.103 +};
1.104 +
1.105 +class nsFontFaceLoader : public nsIStreamLoaderObserver
1.106 +{
1.107 +public:
1.108 + nsFontFaceLoader(gfxMixedFontFamily* aFontFamily,
1.109 + gfxProxyFontEntry* aFontToLoad, nsIURI* aFontURI,
1.110 + nsUserFontSet* aFontSet, nsIChannel* aChannel);
1.111 +
1.112 + virtual ~nsFontFaceLoader();
1.113 +
1.114 + NS_DECL_ISUPPORTS
1.115 + NS_DECL_NSISTREAMLOADEROBSERVER
1.116 +
1.117 + // initiate the load
1.118 + nsresult Init();
1.119 + // cancel the load and remove its reference to mFontSet
1.120 + void Cancel();
1.121 +
1.122 + void DropChannel() { mChannel = nullptr; }
1.123 +
1.124 + void StartedLoading(nsIStreamLoader* aStreamLoader);
1.125 +
1.126 + static void LoadTimerCallback(nsITimer* aTimer, void* aClosure);
1.127 +
1.128 + static nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal,
1.129 + nsIURI* aTargetURI,
1.130 + nsISupports* aContext);
1.131 +
1.132 +private:
1.133 + nsRefPtr<gfxMixedFontFamily> mFontFamily;
1.134 + nsRefPtr<gfxProxyFontEntry> mFontEntry;
1.135 + nsCOMPtr<nsIURI> mFontURI;
1.136 + nsRefPtr<nsUserFontSet> mFontSet;
1.137 + nsCOMPtr<nsIChannel> mChannel;
1.138 + nsCOMPtr<nsITimer> mLoadTimer;
1.139 +
1.140 + nsIStreamLoader* mStreamLoader;
1.141 +};
1.142 +
1.143 +#endif /* !defined(nsFontFaceLoader_h_) */
