layout/style/nsFontFaceLoader.h@7e26c7da4463 (annotated)
layout/style/nsFontFaceLoader.h
Wed, 31 Dec 2014 06:55:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:55:50 +0100
- changeset 2
- 7e26c7da4463
- permissions
- -rw-r--r--
Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | // vim:cindent:ts=2:et:sw=2: |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | /* code for loading in @font-face defined font data */ |
| michael@0 | 8 | |
| michael@0 | 9 | #ifndef nsFontFaceLoader_h_ |
| michael@0 | 10 | #define nsFontFaceLoader_h_ |
| michael@0 | 11 | |
| michael@0 | 12 | #include "mozilla/Attributes.h" |
| michael@0 | 13 | #include "nsCOMPtr.h" |
| michael@0 | 14 | #include "nsIStreamLoader.h" |
| michael@0 | 15 | #include "nsIChannel.h" |
| michael@0 | 16 | #include "gfxUserFontSet.h" |
| michael@0 | 17 | #include "nsHashKeys.h" |
| michael@0 | 18 | #include "nsTHashtable.h" |
| michael@0 | 19 | #include "nsCSSRules.h" |
| michael@0 | 20 | |
| michael@0 | 21 | class nsPresContext; |
| michael@0 | 22 | class nsIPrincipal; |
| michael@0 | 23 | |
| michael@0 | 24 | class nsFontFaceLoader; |
| michael@0 | 25 | |
| michael@0 | 26 | // nsUserFontSet - defines the loading mechanism for downloadable fonts |
| michael@0 | 27 | class nsUserFontSet : public gfxUserFontSet |
| michael@0 | 28 | { |
| michael@0 | 29 | public: |
| michael@0 | 30 | nsUserFontSet(nsPresContext* aContext); |
| michael@0 | 31 | |
| michael@0 | 32 | // Called when this font set is no longer associated with a presentation. |
| michael@0 | 33 | void Destroy(); |
| michael@0 | 34 | |
| michael@0 | 35 | // starts loading process, creating and initializing a nsFontFaceLoader obj |
| michael@0 | 36 | // returns whether load process successfully started or not |
| michael@0 | 37 | nsresult StartLoad(gfxMixedFontFamily* aFamily, |
| michael@0 | 38 | gfxProxyFontEntry* aFontToLoad, |
| michael@0 | 39 | const gfxFontFaceSrc* aFontFaceSrc) MOZ_OVERRIDE; |
| michael@0 | 40 | |
| michael@0 | 41 | // Called by nsFontFaceLoader when the loader has completed normally. |
| michael@0 | 42 | // It's removed from the mLoaders set. |
| michael@0 | 43 | void RemoveLoader(nsFontFaceLoader* aLoader); |
| michael@0 | 44 | |
| michael@0 | 45 | bool UpdateRules(const nsTArray<nsFontFaceRuleContainer>& aRules); |
| michael@0 | 46 | |
| michael@0 | 47 | virtual nsPresContext* GetPresContext() { return mPresContext; } |
| michael@0 | 48 | |
| michael@0 | 49 | virtual void ReplaceFontEntry(gfxMixedFontFamily* aFamily, |
| michael@0 | 50 | gfxProxyFontEntry* aProxy, |
| michael@0 | 51 | gfxFontEntry* aFontEntry) MOZ_OVERRIDE; |
| michael@0 | 52 | |
| michael@0 | 53 | nsCSSFontFaceRule* FindRuleForEntry(gfxFontEntry* aFontEntry); |
| michael@0 | 54 | |
| michael@0 | 55 | protected: |
| michael@0 | 56 | // Protected destructor, to discourage deletion outside of Release() |
| michael@0 | 57 | // (since we inherit from refcounted class gfxUserFontSet): |
| michael@0 | 58 | ~nsUserFontSet(); |
| michael@0 | 59 | |
| michael@0 | 60 | // The font-set keeps track of the collection of rules, and their |
| michael@0 | 61 | // corresponding font entries (whether proxies or real entries), |
| michael@0 | 62 | // so that we can update the set without having to throw away |
| michael@0 | 63 | // all the existing fonts. |
| michael@0 | 64 | struct FontFaceRuleRecord { |
| michael@0 | 65 | nsRefPtr<gfxFontEntry> mFontEntry; |
| michael@0 | 66 | nsFontFaceRuleContainer mContainer; |
| michael@0 | 67 | }; |
| michael@0 | 68 | |
| michael@0 | 69 | void InsertRule(nsCSSFontFaceRule* aRule, uint8_t aSheetType, |
| michael@0 | 70 | nsTArray<FontFaceRuleRecord>& oldRules, |
| michael@0 | 71 | bool& aFontSetModified); |
| michael@0 | 72 | |
| michael@0 | 73 | virtual nsresult LogMessage(gfxMixedFontFamily* aFamily, |
| michael@0 | 74 | gfxProxyFontEntry* aProxy, |
| michael@0 | 75 | const char* aMessage, |
| michael@0 | 76 | uint32_t aFlags = nsIScriptError::errorFlag, |
| michael@0 | 77 | nsresult aStatus = NS_OK) MOZ_OVERRIDE; |
| michael@0 | 78 | |
| michael@0 | 79 | virtual nsresult CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc, |
| michael@0 | 80 | nsIPrincipal** aPrincipal, |
| michael@0 | 81 | bool* aBypassCache) MOZ_OVERRIDE; |
| michael@0 | 82 | |
| michael@0 | 83 | virtual nsresult SyncLoadFontData(gfxProxyFontEntry* aFontToLoad, |
| michael@0 | 84 | const gfxFontFaceSrc* aFontFaceSrc, |
| michael@0 | 85 | uint8_t*& aBuffer, |
| michael@0 | 86 | uint32_t& aBufferLength) MOZ_OVERRIDE; |
| michael@0 | 87 | |
| michael@0 | 88 | virtual bool GetPrivateBrowsing() MOZ_OVERRIDE; |
| michael@0 | 89 | |
| michael@0 | 90 | virtual void DoRebuildUserFontSet() MOZ_OVERRIDE; |
| michael@0 | 91 | |
| michael@0 | 92 | nsPresContext* mPresContext; // weak reference |
| michael@0 | 93 | |
| michael@0 | 94 | // Set of all loaders pointing to us. These are not strong pointers, |
| michael@0 | 95 | // but that's OK because nsFontFaceLoader always calls RemoveLoader on |
| michael@0 | 96 | // us before it dies (unless we die first). |
| michael@0 | 97 | nsTHashtable< nsPtrHashKey<nsFontFaceLoader> > mLoaders; |
| michael@0 | 98 | |
| michael@0 | 99 | nsTArray<FontFaceRuleRecord> mRules; |
| michael@0 | 100 | }; |
| michael@0 | 101 | |
| michael@0 | 102 | class nsFontFaceLoader : public nsIStreamLoaderObserver |
| michael@0 | 103 | { |
| michael@0 | 104 | public: |
| michael@0 | 105 | nsFontFaceLoader(gfxMixedFontFamily* aFontFamily, |
| michael@0 | 106 | gfxProxyFontEntry* aFontToLoad, nsIURI* aFontURI, |
| michael@0 | 107 | nsUserFontSet* aFontSet, nsIChannel* aChannel); |
| michael@0 | 108 | |
| michael@0 | 109 | virtual ~nsFontFaceLoader(); |
| michael@0 | 110 | |
| michael@0 | 111 | NS_DECL_ISUPPORTS |
| michael@0 | 112 | NS_DECL_NSISTREAMLOADEROBSERVER |
| michael@0 | 113 | |
| michael@0 | 114 | // initiate the load |
| michael@0 | 115 | nsresult Init(); |
| michael@0 | 116 | // cancel the load and remove its reference to mFontSet |
| michael@0 | 117 | void Cancel(); |
| michael@0 | 118 | |
| michael@0 | 119 | void DropChannel() { mChannel = nullptr; } |
| michael@0 | 120 | |
| michael@0 | 121 | void StartedLoading(nsIStreamLoader* aStreamLoader); |
| michael@0 | 122 | |
| michael@0 | 123 | static void LoadTimerCallback(nsITimer* aTimer, void* aClosure); |
| michael@0 | 124 | |
| michael@0 | 125 | static nsresult CheckLoadAllowed(nsIPrincipal* aSourcePrincipal, |
| michael@0 | 126 | nsIURI* aTargetURI, |
| michael@0 | 127 | nsISupports* aContext); |
| michael@0 | 128 | |
| michael@0 | 129 | private: |
| michael@0 | 130 | nsRefPtr<gfxMixedFontFamily> mFontFamily; |
| michael@0 | 131 | nsRefPtr<gfxProxyFontEntry> mFontEntry; |
| michael@0 | 132 | nsCOMPtr<nsIURI> mFontURI; |
| michael@0 | 133 | nsRefPtr<nsUserFontSet> mFontSet; |
| michael@0 | 134 | nsCOMPtr<nsIChannel> mChannel; |
| michael@0 | 135 | nsCOMPtr<nsITimer> mLoadTimer; |
| michael@0 | 136 | |
| michael@0 | 137 | nsIStreamLoader* mStreamLoader; |
| michael@0 | 138 | }; |
| michael@0 | 139 | |
| michael@0 | 140 | #endif /* !defined(nsFontFaceLoader_h_) */ |
