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e134d17fa0
This patch aims to split the implementation details of FontFace(Set) into FontFace(Set)Impl classes. The Impl variants have threadsafe refcounting and are intended to be the basis for worker support for FontFace(Set). We need threadsafe objects to pass around because parts of the stack can only run on the main thread (network loading of font data, graphics initialization of a font) even if the FontFace(Set) itself lives on a DOM worker thread. Given the DOM facing objects are cycle collected, we need additional indirection to support this use case. This patch should be a non-functional change. Differential Revision: https://phabricator.services.mozilla.com/D147505
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 "mozilla/Attributes.h"
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#include "mozilla/TimeStamp.h"
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#include "mozilla/dom/FontFaceSetImpl.h"
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#include "nsCOMPtr.h"
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#include "nsIFontLoadCompleteCallback.h"
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#include "nsIStreamLoader.h"
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#include "nsIChannel.h"
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#include "nsIRequestObserver.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 nsIPrincipal;
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class nsITimer;
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class nsFontFaceLoader final : public nsIStreamLoaderObserver,
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public nsIRequestObserver,
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public nsIFontLoadCompleteCallback {
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public:
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nsFontFaceLoader(gfxUserFontEntry* aUserFontEntry, uint32_t aSrcIndex,
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mozilla::dom::FontFaceSetImpl* aFontFaceSet,
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nsIChannel* aChannel);
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NS_DECL_ISUPPORTS
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NS_DECL_NSISTREAMLOADEROBSERVER
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NS_DECL_NSIREQUESTOBSERVER
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// cancel the load and remove its reference to mFontFaceSet
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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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gfxUserFontEntry* GetUserFontEntry() const { return mUserFontEntry; }
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// Called by the gfxUserFontEntry once it has finished the platform font
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// loading.
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NS_IMETHODIMP FontLoadComplete() final;
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protected:
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virtual ~nsFontFaceLoader();
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// helper method for determining the font-display value
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mozilla::StyleFontDisplay GetFontDisplay();
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private:
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RefPtr<gfxUserFontEntry> mUserFontEntry;
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nsCOMPtr<nsIURI> mFontURI;
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// Cleared in FontFaceSet::~FontFaceSet, and on cancelation and such too.
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mozilla::dom::FontFaceSetImpl* MOZ_NON_OWNING_REF mFontFaceSet;
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nsCOMPtr<nsIChannel> mChannel;
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nsCOMPtr<nsITimer> mLoadTimer;
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mozilla::TimeStamp mStartTime;
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nsIStreamLoader* mStreamLoader;
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uint32_t mSrcIndex;
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bool mInStreamComplete = false;
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bool mInLoadTimerCallback = false;
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};
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#endif /* !defined(nsFontFaceLoader_h_) */
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