mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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305 lines
12 KiB
C++
305 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 "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 "gfxFont.h"
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#include "gfxPlatform.h"
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#include "nsIMemoryReporter.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/MemoryReporting.h"
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class CharMapHashKey : public PLDHashEntryHdr
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{
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public:
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typedef gfxCharacterMap* KeyType;
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typedef const gfxCharacterMap* KeyTypePointer;
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CharMapHashKey(const gfxCharacterMap *aCharMap) :
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mCharMap(const_cast<gfxCharacterMap*>(aCharMap))
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{
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MOZ_COUNT_CTOR(CharMapHashKey);
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}
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CharMapHashKey(const CharMapHashKey& toCopy) :
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mCharMap(toCopy.mCharMap)
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{
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MOZ_COUNT_CTOR(CharMapHashKey);
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}
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~CharMapHashKey()
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{
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MOZ_COUNT_DTOR(CharMapHashKey);
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}
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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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{
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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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gfxCharacterMap *mCharMap;
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};
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// gfxPlatformFontList is an abstract class for the global font list on the system;
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// concrete subclasses for each platform implement the actual interface to the system fonts.
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// This class exists because we cannot rely on the platform font-finding APIs to behave
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// in sensible/similar ways, particularly with rich, complex OpenType families,
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// so we do our own font family/style management here instead.
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// Much of this is based on the old gfxQuartzFontCache, but adapted for use on 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 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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};
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class gfxPlatformFontList : protected gfxFontInfoLoader
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{
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public:
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static gfxPlatformFontList* PlatformFontList() {
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return sPlatformFontList;
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}
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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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virtual nsresult InitFontList();
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void GetFontList (nsIAtom *aLangGroup,
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const nsACString& aGenericFamily,
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nsTArray<nsString>& aListOfFonts);
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virtual bool ResolveFontName(const nsAString& aFontName,
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nsAString& aResolvedFontName);
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void UpdateFontList() { InitFontList(); }
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void ClearPrefFonts() { mPrefFonts.Clear(); }
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virtual void GetFontFamilyList(nsTArray<nsRefPtr<gfxFontFamily> >& aFamilyArray);
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virtual gfxFontEntry*
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SystemFindFontForChar(const uint32_t aCh,
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int32_t aRunScript,
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const gfxFontStyle* aStyle);
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// TODO: make this virtual, for lazily adding to the font list
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virtual gfxFontFamily* FindFamily(const nsAString& aFamily);
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gfxFontEntry* FindFontForFamily(const nsAString& aFamily, const gfxFontStyle* aStyle, bool& aNeedsBold);
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bool GetPrefFontFamilyEntries(eFontPrefLang aLangGroup, nsTArray<nsRefPtr<gfxFontFamily> > *array);
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void SetPrefFontFamilyEntries(eFontPrefLang aLangGroup, nsTArray<nsRefPtr<gfxFontFamily> >& array);
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// name lookup table methods
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void AddOtherFamilyName(gfxFontFamily *aFamilyEntry, nsAString& aOtherFamilyName);
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void AddFullname(gfxFontEntry *aFontEntry, nsAString& aFullname);
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void AddPostscriptName(gfxFontEntry *aFontEntry, nsAString& aPostscriptName);
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bool NeedFullnamePostscriptNames() { return mExtraNames != nullptr; }
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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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virtual gfxFontFamily* GetDefaultFont(const gfxFontStyle* aStyle) = 0;
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// look up a font by name on the host platform
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virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry,
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const nsAString& aFontName) = 0;
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// create a new platform font from downloaded data (@font-face)
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// this method is responsible to ensure aFontData is NS_Free()'d
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virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry,
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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 nsAString& aFontName, nsAString& aFamilyName);
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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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// 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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protected:
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class MemoryReporter MOZ_FINAL : public nsIMemoryReporter
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{
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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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gfxPlatformFontList(bool aNeedFullnamePostscriptNames = true);
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static gfxPlatformFontList *sPlatformFontList;
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static PLDHashOperator FindFontForCharProc(nsStringHashKey::KeyType aKey,
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nsRefPtr<gfxFontFamily>& aFamilyEntry,
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void* userArg);
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// returns default font for a given character, null otherwise
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gfxFontEntry* CommonFontFallback(const uint32_t aCh,
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int32_t aRunScript,
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const gfxFontStyle* aMatchStyle,
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gfxFontFamily** aMatchedFamily);
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// search fonts system-wide for a given character, null otherwise
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virtual gfxFontEntry* GlobalFontFallback(const uint32_t aCh,
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int32_t aRunScript,
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const gfxFontStyle* aMatchStyle,
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uint32_t& aCmapCount,
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gfxFontFamily** aMatchedFamily);
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// whether system-based font fallback is used or not
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// if system fallback is used, no need to load all cmaps
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virtual bool UsesSystemFallback() { return false; }
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// separate initialization for reading in name tables, since this is expensive
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void InitOtherFamilyNames();
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static PLDHashOperator InitOtherFamilyNamesProc(nsStringHashKey::KeyType aKey,
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nsRefPtr<gfxFontFamily>& aFamilyEntry,
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void* userArg);
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// read in all fullname/Postscript names for all font faces
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void InitFaceNameLists();
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static PLDHashOperator InitFaceNameListsProc(nsStringHashKey::KeyType aKey,
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nsRefPtr<gfxFontFamily>& aFamilyEntry,
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void* userArg);
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// commonly used fonts for which the name table should be loaded at startup
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virtual void PreloadNamesList();
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// load the bad underline blacklist from pref.
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void LoadBadUnderlineList();
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// explicitly set fixed-pitch flag for all faces
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void SetFixedPitch(const nsAString& aFamilyName);
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void GenerateFontListKey(const nsAString& aKeyName, nsAString& aResult);
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static PLDHashOperator
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HashEnumFuncForFamilies(nsStringHashKey::KeyType aKey,
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nsRefPtr<gfxFontFamily>& aFamilyEntry,
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void* aUserArg);
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// gfxFontInfoLoader overrides, used to load in font cmaps
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virtual void InitLoader();
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virtual bool RunLoader();
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virtual void FinishLoader();
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// read the loader initialization prefs, and start it
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void GetPrefsAndStartLoader();
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// used by memory reporter to accumulate sizes of family names in the hash
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static size_t
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SizeOfFamilyNameEntryExcludingThis(const nsAString& aKey,
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const nsRefPtr<gfxFontFamily>& aFamily,
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mozilla::MallocSizeOf aMallocSizeOf,
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void* aUserArg);
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// canonical family name ==> family entry (unique, one name per family entry)
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nsRefPtrHashtable<nsStringHashKey, gfxFontFamily> mFontFamilies;
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// other family name ==> family entry (not unique, can have multiple names per
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// family entry, only names *other* than the canonical names are stored here)
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nsRefPtrHashtable<nsStringHashKey, gfxFontFamily> mOtherFamilyNames;
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// flag set after InitOtherFamilyNames is called upon first name lookup miss
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bool mOtherFamilyNamesInitialized;
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// flag set after fullname and Postcript name lists are populated
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bool mFaceNamesInitialized;
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struct ExtraNames {
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ExtraNames() : mFullnames(100), mPostscriptNames(100) {}
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// fullname ==> font entry (unique, one name per font entry)
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nsRefPtrHashtable<nsStringHashKey, gfxFontEntry> mFullnames;
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// Postscript name ==> font entry (unique, one name per font entry)
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nsRefPtrHashtable<nsStringHashKey, gfxFontEntry> mPostscriptNames;
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};
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nsAutoPtr<ExtraNames> mExtraNames;
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// cached pref font lists
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// maps list of family names ==> array of family entries, one per lang group
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nsDataHashtable<nsUint32HashKey, nsTArray<nsRefPtr<gfxFontFamily> > > mPrefFonts;
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// when system-wide font lookup fails for a character, cache it to skip future searches
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gfxSparseBitSet mCodepointsWithNoFonts;
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// the family to use for U+FFFD fallback, to avoid expensive search every time
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// on pages with lots of problems
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nsRefPtr<gfxFontFamily> mReplacementCharFallbackFamily;
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nsTHashtable<nsStringHashKey> mBadUnderlineFamilyNames;
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// character map data shared across families
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// contains weak ptrs to cmaps shared by font entry objects
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nsTHashtable<CharMapHashKey> mSharedCmaps;
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// data used as part of the font cmap loading process
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nsTArray<nsRefPtr<gfxFontFamily> > mFontFamiliesToLoad;
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uint32_t mStartIndex;
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uint32_t mIncrement;
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uint32_t mNumFamilies;
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};
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#endif /* GFXPLATFORMFONTLIST_H_ */
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