forked from mirrors/gecko-dev
bfa1d70def
This does not in itself change user-visible behavior, but is a foundation for bug 1715507 where we will make the behavior per-context instead of global. This is basically just plumbing, passing a pointer to the presContext that's asking for fonts to be resolved all the way down to the gfx code that handles the font list and looks up fonts. For the immediate goal of making font visibility work per-context, it would be sufficient to pass the desired visibility level in to the font-selection methods. However, passing the actual presContext down (and not just its visibility level) will enable us to report back via the dev console when a font is blocked (see bug 1715537), so the approach here provides the basis for that upcoming enhancement. Depends on D124194 Differential Revision: https://phabricator.services.mozilla.com/D124195
412 lines
15 KiB
C++
412 lines
15 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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#ifndef mozilla_dom_FontFaceSet_h
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#define mozilla_dom_FontFaceSet_h
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#include "mozilla/dom/FontFace.h"
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#include "mozilla/dom/FontFaceSetBinding.h"
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#include "mozilla/DOMEventTargetHelper.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "gfxUserFontSet.h"
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#include "nsICSSLoaderObserver.h"
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#include "nsIDOMEventListener.h"
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struct gfxFontFaceSrc;
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class gfxFontSrcPrincipal;
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class gfxUserFontEntry;
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class nsFontFaceLoader;
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class nsIPrincipal;
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class nsPIDOMWindowInner;
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struct RawServoFontFaceRule;
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namespace mozilla {
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class PostTraversalTask;
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class SharedFontList;
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namespace dom {
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class FontFace;
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class Promise;
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} // namespace dom
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} // namespace mozilla
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namespace mozilla {
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namespace dom {
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class FontFaceSet final : public DOMEventTargetHelper,
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public nsIDOMEventListener,
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public nsICSSLoaderObserver {
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friend class mozilla::PostTraversalTask;
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friend class UserFontSet;
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public:
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/**
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* A gfxUserFontSet that integrates with the layout and style systems to
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* manage @font-face rules and handle network requests for font loading.
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*
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* We would combine this class and FontFaceSet into the one class if it were
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* possible; it's not because FontFaceSet is cycle collected and
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* gfxUserFontSet isn't (and can't be, as gfx classes don't use the cycle
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* collector). So UserFontSet exists just to override the needed virtual
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* methods from gfxUserFontSet and to forward them on FontFaceSet.
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*/
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class UserFontSet final : public gfxUserFontSet {
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friend class FontFaceSet;
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public:
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explicit UserFontSet(FontFaceSet* aFontFaceSet)
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: mFontFaceSet(aFontFaceSet) {}
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FontFaceSet* GetFontFaceSet() { return mFontFaceSet; }
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gfxFontSrcPrincipal* GetStandardFontLoadPrincipal() const final {
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return mFontFaceSet ? mFontFaceSet->mStandardFontLoadPrincipal.get()
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: nullptr;
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}
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nsPresContext* GetPresContext() const final {
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return mFontFaceSet ? mFontFaceSet->GetPresContext() : nullptr;
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}
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bool IsFontLoadAllowed(const gfxFontFaceSrc&) final;
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void DispatchFontLoadViolations(
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nsTArray<nsCOMPtr<nsIRunnable>>& aViolations) override;
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virtual nsresult StartLoad(gfxUserFontEntry* aUserFontEntry,
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uint32_t aSrcIndex) override;
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void RecordFontLoadDone(uint32_t aFontSize, TimeStamp aDoneTime) override;
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bool BypassCache() final {
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return mFontFaceSet && mFontFaceSet->mBypassCache;
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}
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protected:
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virtual bool GetPrivateBrowsing() override;
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virtual nsresult SyncLoadFontData(gfxUserFontEntry* aFontToLoad,
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const gfxFontFaceSrc* aFontFaceSrc,
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uint8_t*& aBuffer,
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uint32_t& aBufferLength) override;
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virtual nsresult LogMessage(gfxUserFontEntry* aUserFontEntry,
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uint32_t aSrcIndex, const char* aMessage,
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uint32_t aFlags = nsIScriptError::errorFlag,
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nsresult aStatus = NS_OK) override;
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virtual void DoRebuildUserFontSet() override;
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already_AddRefed<gfxUserFontEntry> CreateUserFontEntry(
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const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList, WeightRange aWeight,
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StretchRange aStretch, SlantStyleRange aStyle,
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const nsTArray<gfxFontFeature>& aFeatureSettings,
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const nsTArray<gfxFontVariation>& aVariationSettings,
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uint32_t aLanguageOverride, gfxCharacterMap* aUnicodeRanges,
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StyleFontDisplay aFontDisplay, RangeFlags aRangeFlags,
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float aAscentOverride, float aDescentOverride, float aLineGapOverride,
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float aSizeAdjust) override;
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private:
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RefPtr<FontFaceSet> mFontFaceSet;
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};
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(FontFaceSet, DOMEventTargetHelper)
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NS_DECL_NSIDOMEVENTLISTENER
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FontFaceSet(nsPIDOMWindowInner* aWindow, dom::Document* aDocument);
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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UserFontSet* GetUserFontSet() { return mUserFontSet; }
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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();
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// search for @font-face rule that matches a platform font entry
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RawServoFontFaceRule* FindRuleForEntry(gfxFontEntry* aFontEntry);
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void IncrementGeneration(bool aIsRebuild = false);
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/**
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* Finds an existing entry in the user font cache or creates a new user
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* font entry for the given FontFace object.
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*/
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static already_AddRefed<gfxUserFontEntry>
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FindOrCreateUserFontEntryFromFontFace(FontFace* aFontFace);
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/**
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* Notification method called by a FontFace to indicate that its loading
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* status has changed.
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*/
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void OnFontFaceStatusChanged(FontFace* aFontFace);
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/**
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* Notification method called by the nsPresContext to indicate that the
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* refresh driver ticked and flushed style and layout.
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* were just flushed.
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*/
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void DidRefresh();
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/**
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* Returns whether the "layout.css.font-loading-api.enabled" pref is true.
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*/
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static bool PrefEnabled();
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// nsICSSLoaderObserver
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NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet, bool aWasDeferred,
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nsresult aStatus) override;
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void FlushUserFontSet();
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static nsPresContext* GetPresContextFor(gfxUserFontSet* aUserFontSet) {
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FontFaceSet* set = static_cast<UserFontSet*>(aUserFontSet)->mFontFaceSet;
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return set ? set->GetPresContext() : nullptr;
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}
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void RefreshStandardFontLoadPrincipal();
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void CopyNonRuleFacesTo(FontFaceSet* aFontFaceSet) const;
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dom::Document* Document() const { return mDocument; }
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// -- Web IDL --------------------------------------------------------------
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IMPL_EVENT_HANDLER(loading)
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IMPL_EVENT_HANDLER(loadingdone)
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IMPL_EVENT_HANDLER(loadingerror)
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already_AddRefed<dom::Promise> Load(JSContext* aCx, const nsACString& aFont,
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const nsAString& aText, ErrorResult& aRv);
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bool Check(const nsACString& aFont, const nsAString& aText, ErrorResult& aRv);
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dom::Promise* GetReady(ErrorResult& aRv);
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dom::FontFaceSetLoadStatus Status();
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void Add(FontFace& aFontFace, ErrorResult& aRv);
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void Clear();
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bool Delete(FontFace& aFontFace);
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bool Has(FontFace& aFontFace);
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/**
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* This returns the number of Author origin fonts only.
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* (see also SizeIncludingNonAuthorOrigins() below)
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*/
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uint32_t Size();
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already_AddRefed<dom::FontFaceSetIterator> Entries();
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already_AddRefed<dom::FontFaceSetIterator> Values();
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MOZ_CAN_RUN_SCRIPT
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void ForEach(JSContext* aCx, FontFaceSetForEachCallback& aCallback,
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JS::Handle<JS::Value> aThisArg, ErrorResult& aRv);
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// For ServoStyleSet to know ahead of time whether a font is loadable.
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void CacheFontLoadability();
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void MarkUserFontSetDirty();
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/**
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* Unlike Size(), this returns the size including non-Author origin fonts.
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*/
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uint32_t SizeIncludingNonAuthorOrigins();
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private:
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friend mozilla::dom::FontFaceSetIterator; // needs GetFontFaceAt()
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~FontFaceSet();
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/**
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* Returns whether the given FontFace is currently "in" the FontFaceSet.
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*/
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bool HasAvailableFontFace(FontFace* aFontFace);
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/**
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* Removes any listeners and observers.
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*/
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void Disconnect();
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void RemoveDOMContentLoadedListener();
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/**
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* Returns whether there might be any pending font loads, which should cause
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* the mReady Promise not to be resolved yet.
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*/
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bool MightHavePendingFontLoads();
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/**
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* Checks to see whether it is time to replace mReady and dispatch a
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* "loading" event.
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*/
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void CheckLoadingStarted();
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/**
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* Checks to see whether it is time to resolve mReady and dispatch any
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* "loadingdone" and "loadingerror" events.
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*/
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void CheckLoadingFinished();
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/**
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* Callback for invoking CheckLoadingFinished after going through the
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* event loop. See OnFontFaceStatusChanged.
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*/
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void CheckLoadingFinishedAfterDelay();
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/**
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* Returns the font at aIndex if it's an Author origin font, or nullptr
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* otherwise.
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*/
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FontFace* GetFontFaceAt(uint32_t aIndex);
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/**
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* Dispatches a FontFaceSetLoadEvent to this object.
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*/
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void DispatchLoadingFinishedEvent(
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const nsAString& aType, nsTArray<OwningNonNull<FontFace>>&& aFontFaces);
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// Note: if you add new cycle collected objects to FontFaceRecord,
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// make sure to update FontFaceSet's cycle collection macros
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// accordingly.
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struct FontFaceRecord {
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RefPtr<FontFace> mFontFace;
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Maybe<StyleOrigin> mOrigin; // only relevant for mRuleFaces entries
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// When true, indicates that when finished loading, the FontFace should be
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// included in the subsequent loadingdone/loadingerror event fired at the
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// FontFaceSet.
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bool mLoadEventShouldFire;
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};
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static already_AddRefed<gfxUserFontEntry>
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FindOrCreateUserFontEntryFromFontFace(const nsACString& aFamilyName,
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FontFace* aFontFace, StyleOrigin);
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// search for @font-face rule that matches a userfont font entry
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RawServoFontFaceRule* FindRuleForUserFontEntry(
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gfxUserFontEntry* aUserFontEntry);
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nsresult StartLoad(gfxUserFontEntry* aUserFontEntry, uint32_t aSrcIndex);
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gfxFontSrcPrincipal* GetStandardFontLoadPrincipal();
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nsresult CheckFontLoad(const gfxFontFaceSrc* aFontFaceSrc,
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gfxFontSrcPrincipal** aPrincipal, bool* aBypassCache);
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bool IsFontLoadAllowed(const gfxFontFaceSrc& aSrc);
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void DispatchFontLoadViolations(nsTArray<nsCOMPtr<nsIRunnable>>& aViolations);
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nsresult SyncLoadFontData(gfxUserFontEntry* aFontToLoad,
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const gfxFontFaceSrc* aFontFaceSrc,
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uint8_t*& aBuffer, uint32_t& aBufferLength);
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nsresult LogMessage(gfxUserFontEntry* aUserFontEntry, uint32_t aSrcIndex,
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const char* aMessage, uint32_t aFlags, nsresult aStatus);
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void InsertRuleFontFace(FontFace* aFontFace, StyleOrigin aOrigin,
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nsTArray<FontFaceRecord>& aOldRecords,
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bool& aFontSetModified);
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void InsertNonRuleFontFace(FontFace* aFontFace, bool& aFontSetModified);
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#ifdef DEBUG
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bool HasRuleFontFace(FontFace* aFontFace);
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#endif
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/**
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* Returns whether we have any loading FontFace objects in the FontFaceSet.
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*/
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bool HasLoadingFontFaces();
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// Whether mReady is pending, or would be when created.
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bool ReadyPromiseIsPending() const;
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// Helper function for HasLoadingFontFaces.
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void UpdateHasLoadingFontFaces();
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void ParseFontShorthandForMatching(const nsACString& aFont,
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StyleFontFamilyList& aFamilyList,
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FontWeight& aWeight, FontStretch& aStretch,
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FontSlantStyle& aStyle, ErrorResult& aRv);
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void FindMatchingFontFaces(const nsACString& aFont, const nsAString& aText,
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nsTArray<FontFace*>& aFontFaces, ErrorResult& aRv);
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void DispatchLoadingEventAndReplaceReadyPromise();
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void DispatchCheckLoadingFinishedAfterDelay();
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TimeStamp GetNavigationStartTimeStamp();
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RefPtr<UserFontSet> mUserFontSet;
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// The document this is a FontFaceSet for.
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RefPtr<dom::Document> mDocument;
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// The document's node principal, which is the principal font loads for
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// this FontFaceSet will generally use. (This principal is not used for
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// @font-face rules in UA and user sheets, where the principal of the
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// sheet is used instead.)
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//
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// This field is used from GetStandardFontLoadPrincipal. When on a
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// style worker thread, we use mStandardFontLoadPrincipal assuming
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// it is up to date.
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//
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// Because mDocument's principal can change over time,
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// its value must be updated by a call to ResetStandardFontLoadPrincipal.
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RefPtr<gfxFontSrcPrincipal> mStandardFontLoadPrincipal;
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// A Promise that is fulfilled once all of the FontFace objects
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// in mRuleFaces and mNonRuleFaces that started or were loading at the
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// time the Promise was created have finished loading. It is rejected if
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// any of those fonts failed to load. mReady is replaced with
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// a new Promise object whenever mReady is settled and another
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// FontFace in mRuleFaces or mNonRuleFaces starts to load.
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// Note that mReady is created lazily when GetReady() is called.
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RefPtr<dom::Promise> mReady;
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// Whether the ready promise must be resolved when it's created.
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bool mResolveLazilyCreatedReadyPromise;
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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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// The @font-face rule backed FontFace objects in the FontFaceSet.
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nsTArray<FontFaceRecord> mRuleFaces;
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// The non rule backed FontFace objects that have been added to this
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// FontFaceSet.
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nsTArray<FontFaceRecord> mNonRuleFaces;
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// The overall status of the loading or loaded fonts in the FontFaceSet.
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dom::FontFaceSetLoadStatus mStatus;
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// A map from gfxFontFaceSrc pointer identity to whether the load is allowed
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// by CSP or other checks. We store this here because querying CSP off the
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// main thread is not a great idea.
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//
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// We could use just the pointer and use this as a hash set, but then we'd
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// have no way to verify that we've checked all the loads we should.
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nsTHashMap<nsPtrHashKey<const gfxFontFaceSrc>, bool> mAllowedFontLoads;
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// Whether mNonRuleFaces has changed since last time UpdateRules ran.
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bool mNonRuleFacesDirty;
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// Whether any FontFace objects in mRuleFaces or mNonRuleFaces are
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// loading. Only valid when mHasLoadingFontFacesIsDirty is false. Don't use
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// this variable directly; call the HasLoadingFontFaces method instead.
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bool mHasLoadingFontFaces;
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// This variable is only valid when mLoadingDirty is false.
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bool mHasLoadingFontFacesIsDirty;
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// Whether CheckLoadingFinished calls should be ignored. See comment in
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// OnFontFaceStatusChanged.
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bool mDelayedLoadCheck;
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// Whether the docshell for our document indicated that loads should
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// bypass the cache.
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bool mBypassCache;
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// Whether the docshell for our document indicates that we are in private
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// browsing mode.
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bool mPrivateBrowsing;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // !defined(mozilla_dom_FontFaceSet_h)
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