зеркало из https://github.com/mozilla/gecko-dev.git
135 строки
4.5 KiB
C++
135 строки
4.5 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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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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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 "nsIChannel.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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#include "nsCSSRules.h"
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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(gfxMixedFontFamily* aFamily,
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gfxProxyFontEntry* 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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bool UpdateRules(const nsTArray<nsFontFaceRuleContainer>& aRules);
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nsPresContext* GetPresContext() { return mPresContext; }
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virtual void ReplaceFontEntry(gfxMixedFontFamily* aFamily,
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gfxProxyFontEntry* aProxy,
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gfxFontEntry* aFontEntry);
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nsCSSFontFaceRule* FindRuleForEntry(gfxFontEntry* aFontEntry);
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protected:
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// The font-set keeps track of the collection of rules, and their
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// corresponding font entries (whether proxies or real entries),
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// so that we can update the set without having to throw away
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// all the existing fonts.
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struct FontFaceRuleRecord {
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nsRefPtr<gfxFontEntry> mFontEntry;
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nsFontFaceRuleContainer mContainer;
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};
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void InsertRule(nsCSSFontFaceRule* aRule, uint8_t aSheetType,
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nsTArray<FontFaceRuleRecord>& oldRules,
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bool& aFontSetModified);
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virtual nsresult LogMessage(gfxMixedFontFamily* aFamily,
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gfxProxyFontEntry* aProxy,
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const char* aMessage,
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uint32_t aFlags = nsIScriptError::errorFlag,
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nsresult aStatus = NS_OK);
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virtual nsresult CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc,
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nsIPrincipal** aPrincipal,
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bool* aBypassCache);
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virtual nsresult SyncLoadFontData(gfxProxyFontEntry* aFontToLoad,
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const gfxFontFaceSrc* aFontFaceSrc,
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uint8_t*& aBuffer,
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uint32_t& aBufferLength);
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virtual bool GetPrivateBrowsing() MOZ_OVERRIDE;
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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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nsTArray<FontFaceRuleRecord> mRules;
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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(gfxMixedFontFamily* aFontFamily,
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gfxProxyFontEntry* 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 = nullptr; }
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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<gfxMixedFontFamily> mFontFamily;
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nsRefPtr<gfxProxyFontEntry> 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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