зеркало из https://github.com/mozilla/gecko-dev.git
297 строки
10 KiB
C++
297 строки
10 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_FontFace_h
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#define mozilla_dom_FontFace_h
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#include "mozilla/dom/FontFaceBinding.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "gfxUserFontSet.h"
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#include "nsAutoPtr.h"
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#include "nsCSSPropertyID.h"
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#include "nsCSSValue.h"
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#include "nsWrapperCache.h"
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class gfxFontFaceBufferSource;
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struct RawServoFontFaceRule;
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namespace mozilla {
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struct CSSFontFaceDescriptors;
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class PostTraversalTask;
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class ServoFontFaceRule;
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namespace dom {
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class FontFaceBufferSource;
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struct FontFaceDescriptors;
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class FontFaceSet;
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class Promise;
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class StringOrArrayBufferOrArrayBufferView;
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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 FontFace final : public nsISupports,
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public nsWrapperCache
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{
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friend class mozilla::PostTraversalTask;
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friend class mozilla::dom::FontFaceBufferSource;
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friend class Entry;
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public:
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class Entry final : public gfxUserFontEntry {
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friend class FontFace;
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public:
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Entry(gfxUserFontSet* aFontSet,
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const nsTArray<gfxFontFaceSrc>& aFontFaceSrcList,
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FontWeight aWeight,
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FontStretch aStretch,
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FontSlantStyle aStyle,
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const nsTArray<gfxFontFeature>& aFeatureSettings,
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const nsTArray<gfxFontVariation>& aVariationSettings,
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uint32_t aLanguageOverride,
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gfxCharacterMap* aUnicodeRanges,
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uint8_t aFontDisplay)
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: gfxUserFontEntry(aFontSet, aFontFaceSrcList, aWeight, aStretch,
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aStyle, aFeatureSettings, aVariationSettings,
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aLanguageOverride,
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aUnicodeRanges, aFontDisplay) {}
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virtual void SetLoadState(UserFontLoadState aLoadState) override;
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virtual void GetUserFontSets(nsTArray<gfxUserFontSet*>& aResult) override;
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const AutoTArray<FontFace*,1>& GetFontFaces() { return mFontFaces; }
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protected:
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// The FontFace objects that use this user font entry. We need to store
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// an array of these, not just a single pointer, since the user font
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// cache can return the same entry for different FontFaces that have
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// the same descriptor values and come from the same origin.
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AutoTArray<FontFace*,1> mFontFaces;
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};
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(FontFace)
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nsISupports* GetParentObject() const { return mParent; }
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virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
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static already_AddRefed<FontFace>
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CreateForRule(nsISupports* aGlobal, FontFaceSet* aFontFaceSet,
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RawServoFontFaceRule* aRule);
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RawServoFontFaceRule* GetRule() { return mRule; }
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void GetDesc(nsCSSFontDesc aDescID, nsCSSValue& aResult) const;
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gfxUserFontEntry* CreateUserFontEntry();
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gfxUserFontEntry* GetUserFontEntry() const { return mUserFontEntry; }
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void SetUserFontEntry(gfxUserFontEntry* aEntry);
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/**
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* Returns whether this object is in the specified FontFaceSet.
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*/
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bool IsInFontFaceSet(FontFaceSet* aFontFaceSet) const;
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void AddFontFaceSet(FontFaceSet* aFontFaceSet);
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void RemoveFontFaceSet(FontFaceSet* aFontFaceSet);
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FontFaceSet* GetPrimaryFontFaceSet() const { return mFontFaceSet; }
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/**
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* Gets the family name of the FontFace as a raw string (such as 'Times', as
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* opposed to GetFamily, which returns a CSS-escaped string, such as
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* '"Times"'). Returns whether a valid family name was available.
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*/
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bool GetFamilyName(nsString& aResult);
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/**
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* Returns whether this object is CSS-connected, i.e. reflecting an
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* @font-face rule.
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*/
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bool HasRule() const { return mRule; }
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/**
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* Breaks the connection between this FontFace and its @font-face rule.
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*/
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void DisconnectFromRule();
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/**
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* Returns whether there is an ArrayBuffer or ArrayBufferView of font
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* data.
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*/
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bool HasFontData() const;
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/**
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* Creates a gfxFontFaceBufferSource to represent the font data
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* in this object.
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*/
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already_AddRefed<gfxFontFaceBufferSource> CreateBufferSource();
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/**
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* Gets a pointer to and the length of the font data stored in the
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* ArrayBuffer or ArrayBufferView.
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*/
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bool GetData(uint8_t*& aBuffer, uint32_t& aLength);
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/**
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* Returns the value of the unicode-range descriptor as a gfxCharacterMap.
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*/
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gfxCharacterMap* GetUnicodeRangeAsCharacterMap();
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// Web IDL
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static already_AddRefed<FontFace>
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Constructor(const GlobalObject& aGlobal,
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const nsAString& aFamily,
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const mozilla::dom::StringOrArrayBufferOrArrayBufferView& aSource,
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const mozilla::dom::FontFaceDescriptors& aDescriptors,
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ErrorResult& aRV);
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void GetFamily(nsString& aResult);
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void SetFamily(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetStyle(nsString& aResult);
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void SetStyle(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetWeight(nsString& aResult);
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void SetWeight(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetStretch(nsString& aResult);
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void SetStretch(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetUnicodeRange(nsString& aResult);
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void SetUnicodeRange(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetVariant(nsString& aResult);
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void SetVariant(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetFeatureSettings(nsString& aResult);
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void SetFeatureSettings(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetVariationSettings(nsString& aResult);
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void SetVariationSettings(const nsAString& aValue, mozilla::ErrorResult& aRv);
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void GetDisplay(nsString& aResult);
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void SetDisplay(const nsAString& aValue, mozilla::ErrorResult& aRv);
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mozilla::dom::FontFaceLoadStatus Status();
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mozilla::dom::Promise* Load(mozilla::ErrorResult& aRv);
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mozilla::dom::Promise* GetLoaded(mozilla::ErrorResult& aRv);
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private:
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FontFace(nsISupports* aParent, FontFaceSet* aFontFaceSet);
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~FontFace();
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void InitializeSource(const StringOrArrayBufferOrArrayBufferView& aSource);
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// Helper function for Load.
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void DoLoad();
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// Helper function for the descriptor setter methods.
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// Returns whether it successfully sets the descriptor.
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bool SetDescriptor(nsCSSFontDesc aFontDesc,
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const nsAString& aValue,
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mozilla::ErrorResult& aRv);
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/**
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* Sets all of the descriptor values in mDescriptors using values passed
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* to the JS constructor.
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*/
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bool SetDescriptors(const nsAString& aFamily,
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const FontFaceDescriptors& aDescriptors);
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/**
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* Sets the current loading status.
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*/
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void SetStatus(mozilla::dom::FontFaceLoadStatus aStatus);
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void GetDesc(nsCSSFontDesc aDescID, nsString& aResult) const;
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already_AddRefed<URLExtraData> GetURLExtraData() const;
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RawServoFontFaceRule* GetData() const
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{ return HasRule() ? mRule : mDescriptors; }
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/**
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* Returns and takes ownership of the buffer storing the font data.
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*/
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void TakeBuffer(uint8_t*& aBuffer, uint32_t& aLength);
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// Acts like mLoaded->MaybeReject(aResult), except it doesn't create mLoaded
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// if it doesn't already exist.
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void Reject(nsresult aResult);
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// Creates mLoaded if it doesn't already exist. It may immediately resolve or
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// reject mLoaded based on mStatus and mLoadedRejection.
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void EnsurePromise();
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void DoResolve();
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void DoReject(nsresult aResult);
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nsCOMPtr<nsISupports> mParent;
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// A Promise that is fulfilled once the font represented by this FontFace is
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// loaded, and is rejected if the load fails. This promise is created lazily
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// when JS asks for it.
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RefPtr<mozilla::dom::Promise> mLoaded;
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// Saves the rejection code for mLoaded if mLoaded hasn't been created yet.
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nsresult mLoadedRejection;
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// The @font-face rule this FontFace object is reflecting, if it is a
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// rule backed FontFace.
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RefPtr<RawServoFontFaceRule> mRule;
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// The FontFace object's user font entry. This is initially null, but is set
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// during FontFaceSet::UpdateRules and when a FontFace is explicitly loaded.
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RefPtr<Entry> mUserFontEntry;
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// The current load status of the font represented by this FontFace.
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// Note that we can't just reflect the value of the gfxUserFontEntry's
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// status, since the spec sometimes requires us to go through the event
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// loop before updating the status, rather than doing it immediately.
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mozilla::dom::FontFaceLoadStatus mStatus;
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// Represents where a FontFace's data is coming from.
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enum SourceType {
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eSourceType_FontFaceRule = 1,
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eSourceType_URLs,
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eSourceType_Buffer
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};
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// Where the font data for this FontFace is coming from.
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SourceType mSourceType;
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// If the FontFace was constructed with an ArrayBuffer(View), this is a
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// copy of the data from it.
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uint8_t* mSourceBuffer;
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uint32_t mSourceBufferLength;
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// The values corresponding to the font face descriptors, if we are not
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// a rule backed FontFace object. For rule backed objects, we use
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// the descriptors stored in mRule.
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// FIXME This should hold a unique ptr to just the descriptors inside,
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// so that we don't need to create a rule for it and don't need to
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// assign a fake line number and column number. See bug 1450904.
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RefPtr<RawServoFontFaceRule> mDescriptors;
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// The value of the unicode-range descriptor as a gfxCharacterMap. Valid
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// only when mUnicodeRangeDirty is false.
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RefPtr<gfxCharacterMap> mUnicodeRange;
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// The primary FontFaceSet this FontFace is associated with,
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// regardless of whether it is currently "in" the set.
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RefPtr<FontFaceSet> mFontFaceSet;
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// Other FontFaceSets (apart from mFontFaceSet) that this FontFace
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// appears in.
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nsTArray<RefPtr<FontFaceSet>> mOtherFontFaceSets;
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// Whether mUnicodeRange needs to be rebuilt before being returned from
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// GetUnicodeRangeAsCharacterMap.
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bool mUnicodeRangeDirty;
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// Whether this FontFace appears in mFontFaceSet.
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bool mInFontFaceSet;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // !defined(mozilla_dom_FontFace_h)
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