зеркало из https://github.com/mozilla/gecko-dev.git
795 строки
30 KiB
C++
795 строки
30 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 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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#ifndef GFXPLATFORMFONTLIST_H_
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#define GFXPLATFORMFONTLIST_H_
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#include "nsClassHashtable.h"
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#include "nsDataHashtable.h"
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#include "nsRefPtrHashtable.h"
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#include "nsTHashtable.h"
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#include "gfxFontUtils.h"
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#include "gfxFontInfoLoader.h"
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#include "gfxFont.h"
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#include "gfxFontConstants.h"
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#include "gfxPlatform.h"
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#include "gfxFontFamilyList.h"
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#include "SharedFontList.h"
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#include "nsIMemoryReporter.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/FontPropertyTypes.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Mutex.h"
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#include "mozilla/RangedArray.h"
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#include "nsLanguageAtomService.h"
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class CharMapHashKey : public PLDHashEntryHdr {
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public:
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typedef gfxCharacterMap* KeyType;
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typedef const gfxCharacterMap* KeyTypePointer;
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explicit CharMapHashKey(const gfxCharacterMap* aCharMap)
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: mCharMap(const_cast<gfxCharacterMap*>(aCharMap)) {
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MOZ_COUNT_CTOR(CharMapHashKey);
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}
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CharMapHashKey(const CharMapHashKey& toCopy) : mCharMap(toCopy.mCharMap) {
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MOZ_COUNT_CTOR(CharMapHashKey);
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}
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~CharMapHashKey() { MOZ_COUNT_DTOR(CharMapHashKey); }
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gfxCharacterMap* GetKey() const { return mCharMap; }
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bool KeyEquals(const gfxCharacterMap* aCharMap) const {
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NS_ASSERTION(!aCharMap->mBuildOnTheFly && !mCharMap->mBuildOnTheFly,
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"custom cmap used in shared cmap hashtable");
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// cmaps built on the fly never match
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if (aCharMap->mHash != mCharMap->mHash) {
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return false;
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}
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return mCharMap->Equals(aCharMap);
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}
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static const gfxCharacterMap* KeyToPointer(gfxCharacterMap* aCharMap) {
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return aCharMap;
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}
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static PLDHashNumber HashKey(const gfxCharacterMap* aCharMap) {
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return aCharMap->mHash;
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}
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enum { ALLOW_MEMMOVE = true };
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protected:
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// charMaps are not owned by the shared cmap cache, but it will be notified
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// by gfxCharacterMap::Release() when an entry is about to be deleted
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gfxCharacterMap* MOZ_NON_OWNING_REF mCharMap;
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};
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/**
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* A helper class used to create a SharedBitSet instance in a FontList's shared
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* memory, while ensuring that we avoid bloating memory by avoiding creating
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* duplicate instances.
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*/
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class ShmemCharMapHashEntry final : public PLDHashEntryHdr {
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public:
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typedef const gfxSparseBitSet* KeyType;
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typedef const gfxSparseBitSet* KeyTypePointer;
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/**
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* Creation from a gfxSparseBitSet creates not only the ShmemCharMapHashEntry
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* itself, but also a SharedBitSet in shared memory.
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* Only the parent process creates and manages these entries.
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*/
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explicit ShmemCharMapHashEntry(const gfxSparseBitSet* aCharMap);
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ShmemCharMapHashEntry(const ShmemCharMapHashEntry& aOther)
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: mList(aOther.mList), mCharMap(aOther.mCharMap), mHash(aOther.mHash) {}
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~ShmemCharMapHashEntry() = default;
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/**
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* Return a shared-memory Pointer that refers to the wrapped SharedBitSet.
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* This can be passed to content processes to give them access to the same
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* SharedBitSet as the parent stored.
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*/
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mozilla::fontlist::Pointer GetCharMap() const { return mCharMap; }
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bool KeyEquals(KeyType aCharMap) const {
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// mHash is a 32-bit Adler checksum of the bitset; if it doesn't match we
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// can immediately reject it as non-matching, but if it is equal we still
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// need to do a full equality check below.
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if (mHash != aCharMap->GetChecksum()) {
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return false;
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}
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return static_cast<const SharedBitSet*>(mCharMap.ToPtr(mList))
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->Equals(aCharMap);
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}
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static KeyTypePointer KeyToPointer(KeyType aCharMap) { return aCharMap; }
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static PLDHashNumber HashKey(KeyType aCharMap) {
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return aCharMap->GetChecksum();
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}
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enum { ALLOW_MEMMOVE = true };
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private:
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// charMaps are stored in the shared memory that FontList objects point to,
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// and are never deleted until the FontList (all referencing font lists,
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// actually) have gone away.
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mozilla::fontlist::FontList* mList;
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mozilla::fontlist::Pointer mCharMap;
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uint32_t mHash;
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};
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// gfxPlatformFontList is an abstract class for the global font list on the
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// system; concrete subclasses for each platform implement the actual interface
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// to the system fonts. This class exists because we cannot rely on the platform
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// font-finding APIs to behave in sensible/similar ways, particularly with rich,
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// complex OpenType families, so we do our own font family/style management here
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// instead.
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// Much of this is based on the old gfxQuartzFontCache, but adapted for use on
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// all platforms.
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struct FontListSizes {
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uint32_t mFontListSize; // size of the font list and dependent objects
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// (font family and face names, etc), but NOT
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// including the font table cache and the cmaps
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uint32_t
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mFontTableCacheSize; // memory used for the gfxFontEntry table caches
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uint32_t mCharMapsSize; // memory used for cmap coverage info
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uint32_t mLoaderSize; // memory used for (platform-specific) loader
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uint32_t mSharedSize; // shared-memory use (reported by parent only)
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};
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class gfxUserFontSet;
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class gfxPlatformFontList : public gfxFontInfoLoader {
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friend class InitOtherFamilyNamesRunnable;
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public:
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typedef mozilla::StretchRange StretchRange;
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typedef mozilla::SlantStyleRange SlantStyleRange;
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typedef mozilla::WeightRange WeightRange;
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typedef mozilla::unicode::Script Script;
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// For font family lists loaded from user preferences (prefs such as
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// font.name-list.<generic>.<langGroup>) that map CSS generics to
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// platform-specific font families.
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typedef nsTArray<FontFamily> PrefFontList;
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static gfxPlatformFontList* PlatformFontList() { return sPlatformFontList; }
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static nsresult Init() {
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NS_ASSERTION(!sPlatformFontList, "What's this doing here?");
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gfxPlatform::GetPlatform()->CreatePlatformFontList();
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if (!sPlatformFontList) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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return NS_OK;
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}
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static void Shutdown() {
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delete sPlatformFontList;
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sPlatformFontList = nullptr;
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}
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virtual ~gfxPlatformFontList();
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// initialize font lists
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nsresult InitFontList();
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void FontListChanged();
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/**
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* Gathers (from a platform's underlying font system) the information needed
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* to initialize a fontlist::Family with its Face members.
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*/
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virtual void GetFacesInitDataForFamily(
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const mozilla::fontlist::Family* aFamily,
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nsTArray<mozilla::fontlist::Face::InitData>& aFaces) const {}
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virtual void GetFontList(nsAtom* aLangGroup, const nsACString& aGenericFamily,
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nsTArray<nsString>& aListOfFonts);
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void UpdateFontList();
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virtual void ClearLangGroupPrefFonts();
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void GetFontFamilyList(nsTArray<RefPtr<gfxFontFamily>>& aFamilyArray);
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gfxFontEntry* SystemFindFontForChar(uint32_t aCh, uint32_t aNextCh,
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Script aRunScript,
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const gfxFontStyle* aStyle);
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// Flags to control optional behaviors in FindAndAddFamilies. The sense
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// of the bit flags have been chosen such that the default parameter of
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// FindFamiliesFlags(0) in FindFamily will give the most commonly-desired
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// behavior, and only a few callsites need to explicitly pass other values.
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enum class FindFamiliesFlags {
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// If set, "other" (e.g. localized) family names should be loaded
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// immediately; if clear, InitOtherFamilyNames is allowed to defer
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// loading to avoid blocking.
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eForceOtherFamilyNamesLoading = 1 << 0,
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// If set, FindAndAddFamilies should not check for legacy "styled
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// family" names to add to the font list. This is used to avoid
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// a recursive search when using FindFamily to find a potential base
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// family name for a styled variant.
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eNoSearchForLegacyFamilyNames = 1 << 1,
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// If set, FindAndAddFamilies will not add a missing entry to
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// mOtherNamesMissed
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eNoAddToNamesMissedWhenSearching = 1 << 2,
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// If set, the family name was quoted and so must not be treated as a CSS
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// generic.
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eQuotedFamilyName = 1 << 3
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};
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// Find family(ies) matching aFamily and append to the aOutput array
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// (there may be multiple results in the case of fontconfig aliases, etc).
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// Return true if any match was found and appended, false if none.
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virtual bool FindAndAddFamilies(mozilla::StyleGenericFontFamily aGeneric,
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const nsACString& aFamily,
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nsTArray<FamilyAndGeneric>* aOutput,
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FindFamiliesFlags aFlags,
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gfxFontStyle* aStyle = nullptr,
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gfxFloat aDevToCssSize = 1.0);
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gfxFontEntry* FindFontForFamily(const nsACString& aFamily,
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const gfxFontStyle* aStyle);
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mozilla::fontlist::FontList* SharedFontList() const {
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return mSharedFontList.get();
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}
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// The aPid and aOut parameters are declared here with generic types
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// because (on Windows) we cannot include the proper headers, as they
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// result in build failure due to (indirect) inclusion of windows.h
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// in generated bindings code.
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void ShareFontListShmBlockToProcess(
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uint32_t aGeneration, uint32_t aIndex, /*base::ProcessId*/ uint32_t aPid,
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/*mozilla::ipc::SharedMemoryBasic::Handle*/ void* aOut);
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void SetCharacterMap(uint32_t aGeneration,
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const mozilla::fontlist::Pointer& aFacePtr,
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const gfxSparseBitSet& aMap);
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void SetupFamilyCharMap(uint32_t aGeneration,
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const mozilla::fontlist::Pointer& aFamilyPtr);
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MOZ_MUST_USE bool InitializeFamily(mozilla::fontlist::Family* aFamily);
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void InitializeFamily(uint32_t aGeneration, uint32_t aFamilyIndex);
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// name lookup table methods
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void AddOtherFamilyName(gfxFontFamily* aFamilyEntry,
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nsCString& aOtherFamilyName);
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void AddFullname(gfxFontEntry* aFontEntry, const nsCString& aFullname);
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void AddPostscriptName(gfxFontEntry* aFontEntry,
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const nsCString& aPostscriptName);
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bool NeedFullnamePostscriptNames() { return mExtraNames != nullptr; }
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/**
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* Read PSName and FullName of the given face, for src:local lookup,
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* returning true if actually implemented and succeeded.
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*/
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virtual bool ReadFaceNames(mozilla::fontlist::Family* aFamily,
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mozilla::fontlist::Face* aFace, nsCString& aPSName,
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nsCString& aFullName) {
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return false;
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}
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// initialize localized family names
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void InitOtherFamilyNames(bool aDeferOtherFamilyNamesLoading);
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void InitOtherFamilyNames(uint32_t aGeneration, bool aDefer);
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// pure virtual functions, to be provided by concrete subclasses
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// get the system default font family
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FontFamily GetDefaultFont(const gfxFontStyle* aStyle);
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/**
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* Look up a font by name on the host platform.
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*
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* Note that the style attributes (weight, stretch, style) are NOT used in
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* selecting the platform font, which is looked up by name only; these are
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* values to be recorded in the new font entry.
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*/
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virtual gfxFontEntry* LookupLocalFont(const nsACString& aFontName,
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WeightRange aWeightForEntry,
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StretchRange aStretchForEntry,
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SlantStyleRange aStyleForEntry) = 0;
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/**
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* Create a new platform font from downloaded data (@font-face).
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*
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* Note that the style attributes (weight, stretch, style) are NOT related
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* (necessarily) to any values within the font resource itself; these are
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* values to be recorded in the new font entry and used for face selection,
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* in place of whatever inherent style attributes the resource may have.
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*
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* This method takes ownership of the data block passed in as aFontData,
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* and must ensure it is free()'d when no longer required.
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*/
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virtual gfxFontEntry* MakePlatformFont(const nsACString& aFontName,
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WeightRange aWeightForEntry,
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StretchRange aStretchForEntry,
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SlantStyleRange aStyleForEntry,
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const uint8_t* aFontData,
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uint32_t aLength) = 0;
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// get the standard family name on the platform for a given font name
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// (platforms may override, eg Mac)
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virtual bool GetStandardFamilyName(const nsCString& aFontName,
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nsACString& aFamilyName);
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// get the default font name which is available on the system from
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// font.name-list.*. if there are no available fonts in the pref,
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// returns an empty FamilyAndGeneric record.
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FamilyAndGeneric GetDefaultFontFamily(const nsACString& aLangGroup,
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const nsACString& aGenericFamily);
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virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontListSizes* aSizes) const;
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virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontListSizes* aSizes) const;
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mozilla::fontlist::Pointer GetShmemCharMap(const gfxSparseBitSet* aCmap);
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// search for existing cmap that matches the input
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// return the input if no match is found
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gfxCharacterMap* FindCharMap(gfxCharacterMap* aCmap);
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// add a cmap to the shared cmap set
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gfxCharacterMap* AddCmap(const gfxCharacterMap* aCharMap);
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// remove the cmap from the shared cmap set
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void RemoveCmap(const gfxCharacterMap* aCharMap);
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// keep track of userfont sets to notify when global fontlist changes occur
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void AddUserFontSet(gfxUserFontSet* aUserFontSet) {
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mUserFontSetList.PutEntry(aUserFontSet);
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}
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void RemoveUserFontSet(gfxUserFontSet* aUserFontSet) {
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mUserFontSetList.RemoveEntry(aUserFontSet);
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}
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static const gfxFontEntry::ScriptRange sComplexScriptRanges[];
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void GetFontlistInitInfo(uint32_t& aNumInits, uint32_t& aLoaderState) {
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aNumInits = mFontlistInitCount;
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aLoaderState = (uint32_t)mState;
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}
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virtual void AddGenericFonts(mozilla::StyleGenericFontFamily aGenericType,
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nsAtom* aLanguage,
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nsTArray<FamilyAndGeneric>& aFamilyList);
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/**
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* Given a Face from the shared font list, return a gfxFontEntry usable
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* by the current process. This returns a cached entry if available,
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* otherwise it calls the (platform-specific) CreateFontEntry method to
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* make one, and adds it to the cache.
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*/
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gfxFontEntry* GetOrCreateFontEntry(mozilla::fontlist::Face* aFace,
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const mozilla::fontlist::Family* aFamily);
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PrefFontList* GetPrefFontsLangGroup(
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mozilla::StyleGenericFontFamily aGenericType, eFontPrefLang aPrefLang);
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// in some situations, need to make decisions about ambiguous characters, may
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// need to look at multiple pref langs
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void GetLangPrefs(eFontPrefLang aPrefLangs[], uint32_t& aLen,
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eFontPrefLang aCharLang, eFontPrefLang aPageLang);
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// convert a lang group to enum constant (i.e. "zh-TW" ==>
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// eFontPrefLang_ChineseTW)
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static eFontPrefLang GetFontPrefLangFor(const char* aLang);
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// convert a lang group atom to enum constant
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static eFontPrefLang GetFontPrefLangFor(nsAtom* aLang);
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// convert an enum constant to a lang group atom
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static nsAtom* GetLangGroupForPrefLang(eFontPrefLang aLang);
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// convert a enum constant to lang group string (i.e. eFontPrefLang_ChineseTW
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// ==> "zh-TW")
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static const char* GetPrefLangName(eFontPrefLang aLang);
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// map a char code to a font language for Preferences
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static eFontPrefLang GetFontPrefLangFor(uint32_t aCh);
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// returns true if a pref lang is CJK
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static bool IsLangCJK(eFontPrefLang aLang);
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// helper method to add a pref lang to an array, if not already in array
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static void AppendPrefLang(eFontPrefLang aPrefLangs[], uint32_t& aLen,
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eFontPrefLang aAddLang);
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// default serif/sans-serif choice based on font.default.xxx prefs
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mozilla::StyleGenericFontFamily GetDefaultGeneric(eFontPrefLang aLang);
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// Returns true if the font family whitelist is not empty.
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bool IsFontFamilyWhitelistActive();
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static void FontWhitelistPrefChanged(const char* aPref, void* aClosure);
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bool AddWithLegacyFamilyName(const nsACString& aLegacyName,
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gfxFontEntry* aFontEntry);
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static const char* GetGenericName(
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mozilla::StyleGenericFontFamily aGenericType);
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protected:
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class InitOtherFamilyNamesRunnable : public mozilla::CancelableRunnable {
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public:
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InitOtherFamilyNamesRunnable()
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: CancelableRunnable(
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"gfxPlatformFontList::InitOtherFamilyNamesRunnable"),
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mIsCanceled(false) {}
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NS_IMETHOD Run() override {
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if (mIsCanceled) {
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return NS_OK;
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}
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gfxPlatformFontList* fontList = gfxPlatformFontList::PlatformFontList();
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if (!fontList) {
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return NS_OK;
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}
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fontList->InitOtherFamilyNamesInternal(true);
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return NS_OK;
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}
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nsresult Cancel() override {
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mIsCanceled = true;
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return NS_OK;
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}
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private:
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bool mIsCanceled;
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};
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class MemoryReporter final : public nsIMemoryReporter {
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~MemoryReporter() {}
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIMEMORYREPORTER
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};
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template <bool ForNameList>
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class PrefNameMaker final : public nsAutoCString {
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void Init(const nsACString& aGeneric, const nsACString& aLangGroup) {
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if (ForNameList) {
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AssignLiteral("font.name-list.");
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} else {
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AssignLiteral("font.name.");
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}
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Append(aGeneric);
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if (!aLangGroup.IsEmpty()) {
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Append('.');
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Append(aLangGroup);
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}
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}
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public:
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PrefNameMaker(const nsACString& aGeneric, const nsACString& aLangGroup) {
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Init(aGeneric, aLangGroup);
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}
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PrefNameMaker(const char* aGeneric, const char* aLangGroup) {
|
|
Init(nsDependentCString(aGeneric), nsDependentCString(aLangGroup));
|
|
}
|
|
|
|
PrefNameMaker(const char* aGeneric, nsAtom* aLangGroup) {
|
|
if (aLangGroup) {
|
|
Init(nsDependentCString(aGeneric), nsAtomCString(aLangGroup));
|
|
} else {
|
|
Init(nsDependentCString(aGeneric), nsAutoCString());
|
|
}
|
|
}
|
|
};
|
|
|
|
typedef PrefNameMaker<false> NamePref;
|
|
typedef PrefNameMaker<true> NameListPref;
|
|
|
|
explicit gfxPlatformFontList(bool aNeedFullnamePostscriptNames = true);
|
|
|
|
static gfxPlatformFontList* sPlatformFontList;
|
|
|
|
/**
|
|
* Convenience method to return the first matching family (if any) as found
|
|
* by FindAndAddFamilies(). The family will be initialized (synchronously)
|
|
* if this has not already been done, so the returned pointer, if non-null,
|
|
* is ready for use.
|
|
*/
|
|
mozilla::fontlist::Family* FindSharedFamily(
|
|
const nsACString& aFamily,
|
|
FindFamiliesFlags aFlags = FindFamiliesFlags(0),
|
|
gfxFontStyle* aStyle = nullptr, gfxFloat aDevToCssSize = 1.0);
|
|
|
|
gfxFontFamily* FindUnsharedFamily(
|
|
const nsACString& aFamily,
|
|
FindFamiliesFlags aFlags = FindFamiliesFlags(0),
|
|
gfxFontStyle* aStyle = nullptr, gfxFloat aDevToCssSize = 1.0) {
|
|
if (SharedFontList()) {
|
|
return nullptr;
|
|
}
|
|
AutoTArray<FamilyAndGeneric, 1> families;
|
|
if (FindAndAddFamilies(mozilla::StyleGenericFontFamily::None, aFamily,
|
|
&families, aFlags, aStyle, aDevToCssSize)) {
|
|
return families[0].mFamily.mUnshared;
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
FontFamily FindFamily(const nsACString& aFamily,
|
|
FindFamiliesFlags aFlags = FindFamiliesFlags(0),
|
|
gfxFontStyle* aStyle = nullptr,
|
|
gfxFloat aDevToCssSize = 1.0) {
|
|
if (SharedFontList()) {
|
|
return FontFamily(
|
|
FindSharedFamily(aFamily, aFlags, aStyle, aDevToCssSize));
|
|
}
|
|
return FontFamily(
|
|
FindUnsharedFamily(aFamily, aFlags, aStyle, aDevToCssSize));
|
|
}
|
|
|
|
// Lookup family name in global family list without substitutions or
|
|
// localized family name lookup. Used for common font fallback families.
|
|
gfxFontFamily* FindFamilyByCanonicalName(const nsACString& aFamily) {
|
|
nsAutoCString key;
|
|
gfxFontFamily* familyEntry;
|
|
GenerateFontListKey(aFamily, key);
|
|
if ((familyEntry = mFontFamilies.GetWeak(key))) {
|
|
return CheckFamily(familyEntry);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
// returns default font for a given character, null otherwise
|
|
gfxFontEntry* CommonFontFallback(uint32_t aCh, uint32_t aNextCh,
|
|
Script aRunScript,
|
|
const gfxFontStyle* aMatchStyle,
|
|
FontFamily* aMatchedFamily);
|
|
|
|
// Search fonts system-wide for a given character, null if not found.
|
|
gfxFontEntry* GlobalFontFallback(const uint32_t aCh, Script aRunScript,
|
|
const gfxFontStyle* aMatchStyle,
|
|
uint32_t& aCmapCount,
|
|
FontFamily* aMatchedFamily);
|
|
|
|
// Platform-specific implementation of global font fallback, if any;
|
|
// this may return nullptr in which case the default cmap-based fallback
|
|
// will be performed.
|
|
virtual gfxFontEntry* PlatformGlobalFontFallback(
|
|
const uint32_t aCh, Script aRunScript, const gfxFontStyle* aMatchStyle,
|
|
FontFamily* aMatchedFamily) {
|
|
return nullptr;
|
|
}
|
|
|
|
// whether system-based font fallback is used or not
|
|
// if system fallback is used, no need to load all cmaps
|
|
virtual bool UsesSystemFallback() { return false; }
|
|
|
|
void AppendCJKPrefLangs(eFontPrefLang aPrefLangs[], uint32_t& aLen,
|
|
eFontPrefLang aCharLang, eFontPrefLang aPageLang);
|
|
|
|
// verifies that a family contains a non-zero font count
|
|
gfxFontFamily* CheckFamily(gfxFontFamily* aFamily);
|
|
|
|
// initialize localized family names
|
|
void InitOtherFamilyNamesInternal(bool aDeferOtherFamilyNamesLoading);
|
|
void CancelInitOtherFamilyNamesTask();
|
|
|
|
// search through font families, looking for a given name, initializing
|
|
// facename lists along the way. first checks all families with names
|
|
// close to face name, then searchs all families if not found.
|
|
gfxFontEntry* SearchFamiliesForFaceName(const nsACString& aFaceName);
|
|
|
|
// helper method for finding fullname/postscript names in facename lists
|
|
gfxFontEntry* FindFaceName(const nsACString& aFaceName);
|
|
|
|
// look up a font by name, for cases where platform font list
|
|
// maintains explicit mappings of fullname/psname ==> font
|
|
virtual gfxFontEntry* LookupInFaceNameLists(const nsACString& aFontName);
|
|
|
|
gfxFontEntry* LookupInSharedFaceNameList(const nsACString& aFaceName,
|
|
WeightRange aWeightForEntry,
|
|
StretchRange aStretchForEntry,
|
|
SlantStyleRange aStyleForEntry);
|
|
|
|
// commonly used fonts for which the name table should be loaded at startup
|
|
virtual void PreloadNamesList();
|
|
|
|
// load the bad underline blacklist from pref.
|
|
void LoadBadUnderlineList();
|
|
|
|
void GenerateFontListKey(const nsACString& aKeyName, nsACString& aResult);
|
|
|
|
virtual void GetFontFamilyNames(nsTArray<nsCString>& aFontFamilyNames);
|
|
|
|
// helper function to map lang to lang group
|
|
nsAtom* GetLangGroup(nsAtom* aLanguage);
|
|
|
|
// gfxFontInfoLoader overrides, used to load in font cmaps
|
|
void InitLoader() override;
|
|
bool LoadFontInfo() override;
|
|
void CleanupLoader() override;
|
|
|
|
// read the loader initialization prefs, and start it
|
|
void GetPrefsAndStartLoader();
|
|
|
|
// for font list changes that affect all documents
|
|
void ForceGlobalReflow();
|
|
|
|
void RebuildLocalFonts();
|
|
|
|
void ResolveGenericFontNames(mozilla::StyleGenericFontFamily aGenericType,
|
|
eFontPrefLang aPrefLang,
|
|
PrefFontList* aGenericFamilies);
|
|
|
|
void ResolveEmojiFontNames(PrefFontList* aGenericFamilies);
|
|
|
|
void GetFontFamiliesFromGenericFamilies(
|
|
mozilla::StyleGenericFontFamily aGenericType,
|
|
nsTArray<nsCString>& aGenericNameFamilies, nsAtom* aLangGroup,
|
|
PrefFontList* aFontFamilies);
|
|
|
|
virtual nsresult InitFontListForPlatform() = 0;
|
|
virtual void InitSharedFontListForPlatform() {}
|
|
|
|
virtual gfxFontEntry* CreateFontEntry(
|
|
mozilla::fontlist::Face* aFace,
|
|
const mozilla::fontlist::Family* aFamily) {
|
|
return nullptr;
|
|
}
|
|
|
|
/**
|
|
* Methods to apply the font.system.whitelist anti-fingerprinting pref,
|
|
* by filtering the list of installed fonts so that only whitelisted families
|
|
* are exposed.
|
|
* There are separate implementations of this for the per-process font list
|
|
* and for the shared-memory font list.
|
|
*/
|
|
void ApplyWhitelist();
|
|
void ApplyWhitelist(nsTArray<mozilla::fontlist::Family::InitData>& aFamilies);
|
|
|
|
// Create a new gfxFontFamily of the appropriate subclass for the platform,
|
|
// used when AddWithLegacyFamilyName needs to create a new family.
|
|
virtual gfxFontFamily* CreateFontFamily(const nsACString& aName) const = 0;
|
|
|
|
/**
|
|
* For the post-startup font info loader task.
|
|
* Perform platform-specific work to read alternate names (if any) for a
|
|
* font family, recording them in mAliasTable. Once alternate names have been
|
|
* loaded for all families, the accumulated records are stored in the shared
|
|
* font list's mAliases list.
|
|
* Some platforms (currently Linux/fontconfig) may load alternate names as
|
|
* part of initially populating the font list with family records, in which
|
|
* case this method is unused.
|
|
*/
|
|
virtual void ReadFaceNamesForFamily(mozilla::fontlist::Family* aFamily,
|
|
bool aNeedFullnamePostscriptNames) {}
|
|
|
|
typedef nsRefPtrHashtable<nsCStringHashKey, gfxFontFamily> FontFamilyTable;
|
|
typedef nsRefPtrHashtable<nsCStringHashKey, gfxFontEntry> FontEntryTable;
|
|
|
|
// used by memory reporter to accumulate sizes of family names in the table
|
|
static size_t SizeOfFontFamilyTableExcludingThis(
|
|
const FontFamilyTable& aTable, mozilla::MallocSizeOf aMallocSizeOf);
|
|
static size_t SizeOfFontEntryTableExcludingThis(
|
|
const FontEntryTable& aTable, mozilla::MallocSizeOf aMallocSizeOf);
|
|
|
|
// Platform-specific helper for GetDefaultFont(...).
|
|
virtual FontFamily GetDefaultFontForPlatform(const gfxFontStyle* aStyle) = 0;
|
|
|
|
// Protects mFontFamilies.
|
|
mozilla::Mutex mFontFamiliesMutex;
|
|
|
|
// canonical family name ==> family entry (unique, one name per family entry)
|
|
FontFamilyTable mFontFamilies;
|
|
|
|
// other family name ==> family entry (not unique, can have multiple names per
|
|
// family entry, only names *other* than the canonical names are stored here)
|
|
FontFamilyTable mOtherFamilyNames;
|
|
|
|
// flag set after InitOtherFamilyNames is called upon first name lookup miss
|
|
bool mOtherFamilyNamesInitialized;
|
|
|
|
// The pending InitOtherFamilyNames() task.
|
|
RefPtr<mozilla::CancelableRunnable> mPendingOtherFamilyNameTask;
|
|
|
|
// flag set after fullname and Postcript name lists are populated
|
|
bool mFaceNameListsInitialized;
|
|
|
|
struct ExtraNames {
|
|
ExtraNames() : mFullnames(64), mPostscriptNames(64) {}
|
|
|
|
// fullname ==> font entry (unique, one name per font entry)
|
|
FontEntryTable mFullnames;
|
|
// Postscript name ==> font entry (unique, one name per font entry)
|
|
FontEntryTable mPostscriptNames;
|
|
};
|
|
mozilla::UniquePtr<ExtraNames> mExtraNames;
|
|
|
|
// face names missed when face name loading takes a long time
|
|
mozilla::UniquePtr<nsTHashtable<nsCStringHashKey>> mFaceNamesMissed;
|
|
|
|
// localized family names missed when face name loading takes a long time
|
|
mozilla::UniquePtr<nsTHashtable<nsCStringHashKey>> mOtherNamesMissed;
|
|
|
|
typedef mozilla::RangedArray<mozilla::UniquePtr<PrefFontList>,
|
|
size_t(mozilla::StyleGenericFontFamily::None),
|
|
size_t(
|
|
mozilla::StyleGenericFontFamily::MozEmoji)>
|
|
PrefFontsForLangGroup;
|
|
mozilla::RangedArray<PrefFontsForLangGroup, eFontPrefLang_First,
|
|
eFontPrefLang_Count>
|
|
mLangGroupPrefFonts;
|
|
mozilla::UniquePtr<PrefFontList> mEmojiPrefFont;
|
|
|
|
// when system-wide font lookup fails for a character, cache it to skip future
|
|
// searches
|
|
gfxSparseBitSet mCodepointsWithNoFonts;
|
|
|
|
// the family to use for U+FFFD fallback, to avoid expensive search every time
|
|
// on pages with lots of problems
|
|
FontFamily mReplacementCharFallbackFamily;
|
|
|
|
// Sorted array of lowercased family names; use ContainsSorted to test
|
|
nsTArray<nsCString> mBadUnderlineFamilyNames;
|
|
|
|
// character map data shared across families
|
|
// contains weak ptrs to cmaps shared by font entry objects
|
|
nsTHashtable<CharMapHashKey> mSharedCmaps;
|
|
|
|
nsTHashtable<ShmemCharMapHashEntry> mShmemCharMaps;
|
|
|
|
// data used as part of the font cmap loading process
|
|
nsTArray<RefPtr<gfxFontFamily>> mFontFamiliesToLoad;
|
|
uint32_t mStartIndex;
|
|
uint32_t mNumFamilies;
|
|
|
|
// xxx - info for diagnosing no default font aborts
|
|
// see bugs 636957, 1070983, 1189129
|
|
uint32_t mFontlistInitCount; // num times InitFontList called
|
|
|
|
nsTHashtable<nsPtrHashKey<gfxUserFontSet>> mUserFontSetList;
|
|
|
|
nsLanguageAtomService* mLangService;
|
|
|
|
nsTArray<uint32_t> mCJKPrefLangs;
|
|
nsTArray<mozilla::StyleGenericFontFamily> mDefaultGenericsLangGroup;
|
|
|
|
mozilla::UniquePtr<mozilla::fontlist::FontList> mSharedFontList;
|
|
|
|
nsClassHashtable<nsCStringHashKey, nsTArray<mozilla::fontlist::Pointer>>
|
|
mAliasTable;
|
|
nsDataHashtable<nsCStringHashKey, mozilla::fontlist::LocalFaceRec::InitData>
|
|
mLocalNameTable;
|
|
|
|
nsRefPtrHashtable<nsPtrHashKey<mozilla::fontlist::Face>, gfxFontEntry>
|
|
mFontEntries;
|
|
|
|
bool mFontFamilyWhitelistActive;
|
|
};
|
|
|
|
MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(gfxPlatformFontList::FindFamiliesFlags)
|
|
|
|
#endif /* GFXPLATFORMFONTLIST_H_ */
|