/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- * ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla Corporation code. * * The Initial Developer of the Original Code is Mozilla Foundation. * Portions created by the Initial Developer are Copyright (C) 2008-2009 * the Initial Developer. All Rights Reserved. * * Contributor(s): * Jonathan Kew * * Alternatively, the contents of this file may be used under the terms of * either the GNU General Public License Version 2 or later (the "GPL"), or * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef GFXPLATFORMFONTLIST_H_ #define GFXPLATFORMFONTLIST_H_ #include "nsDataHashtable.h" #include "nsRefPtrHashtable.h" #include "nsHashSets.h" #include "gfxFontUtils.h" #include "gfxFont.h" #include "gfxPlatform.h" // gfxPlatformFontList is an abstract class for the global font list on the system; // concrete subclasses for each platform implement the actual interface to the system fonts. // This class exists because we cannot rely on the platform font-finding APIs to behave // in sensible/similar ways, particularly with rich, complex OpenType families, // so we do our own font family/style management here instead. // Much of this is based on the old gfxQuartzFontCache, but adapted for use on all platforms. class gfxPlatformFontList : protected gfxFontInfoLoader { public: static gfxPlatformFontList* PlatformFontList() { return sPlatformFontList; } static nsresult Init() { NS_ASSERTION(!sPlatformFontList, "What's this doing here?"); sPlatformFontList = gfxPlatform::GetPlatform()->CreatePlatformFontList(); if (!sPlatformFontList) return NS_ERROR_OUT_OF_MEMORY; sPlatformFontList->InitFontList(); return NS_OK; } static void Shutdown() { delete sPlatformFontList; sPlatformFontList = nsnull; } void GetFontList (nsIAtom *aLangGroup, const nsACString& aGenericFamily, nsTArray& aListOfFonts); virtual PRBool ResolveFontName(const nsAString& aFontName, nsAString& aResolvedFontName); void UpdateFontList() { InitFontList(); } void ClearPrefFonts() { mPrefFonts.Clear(); } void GetFontFamilyList(nsTArray >& aFamilyArray); gfxFontEntry* FindFontForChar(const PRUint32 aCh, gfxFont *aPrevFont); gfxFontFamily* FindFamily(const nsAString& aFamily); gfxFontEntry* FindFontForFamily(const nsAString& aFamily, const gfxFontStyle* aStyle, PRBool& aNeedsBold); PRBool GetPrefFontFamilyEntries(eFontPrefLang aLangGroup, nsTArray > *array); void SetPrefFontFamilyEntries(eFontPrefLang aLangGroup, nsTArray >& array); // name lookup table methods void AddOtherFamilyName(gfxFontFamily *aFamilyEntry, nsAString& aOtherFamilyName); void AddFullname(gfxFontEntry *aFontEntry, nsAString& aFullname); void AddPostscriptName(gfxFontEntry *aFontEntry, nsAString& aPostscriptName); PRBool NeedFullnamePostscriptNames() { return mNeedFullnamePostscriptNames; } // pure virtual functions, to be provided by concrete subclasses // get the system default font virtual gfxFontEntry* GetDefaultFont(const gfxFontStyle* aStyle, PRBool& aNeedsBold) = 0; // look up a font by name on the host platform virtual gfxFontEntry* LookupLocalFont(const gfxProxyFontEntry *aProxyEntry, const nsAString& aFontName) = 0; // create a new platform font from downloaded data (@font-face) // this method is responsible to ensure aFontData is NS_Free()'d virtual gfxFontEntry* MakePlatformFont(const gfxProxyFontEntry *aProxyEntry, const PRUint8 *aFontData, PRUint32 aLength) = 0; // get the standard family name on the platform for a given font name // (platforms may override, eg Mac) virtual PRBool GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName); protected: gfxPlatformFontList(PRBool aNeedFullnamePostscriptNames = PR_TRUE); static gfxPlatformFontList *sPlatformFontList; static PLDHashOperator FindFontForCharProc(nsStringHashKey::KeyType aKey, nsRefPtr& aFamilyEntry, void* userArg); // initialize font lists virtual void InitFontList(); // separate initialization for reading in name tables, since this is expensive void InitOtherFamilyNames(); static PLDHashOperator InitOtherFamilyNamesProc(nsStringHashKey::KeyType aKey, nsRefPtr& aFamilyEntry, void* userArg); // read in all fullname/Postscript names for all font faces void InitFaceNameLists(); static PLDHashOperator InitFaceNameListsProc(nsStringHashKey::KeyType aKey, nsRefPtr& aFamilyEntry, void* userArg); // 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(); // explicitly set fixed-pitch flag for all faces void SetFixedPitch(const nsAString& aFamilyName); void GenerateFontListKey(const nsAString& aKeyName, nsAString& aResult); static PLDHashOperator HashEnumFuncForFamilies(nsStringHashKey::KeyType aKey, nsRefPtr& aFamilyEntry, void* aUserArg); // gfxFontInfoLoader overrides, used to load in font cmaps virtual void InitLoader(); virtual PRBool RunLoader(); virtual void FinishLoader(); // canonical family name ==> family entry (unique, one name per family entry) nsRefPtrHashtable mFontFamilies; // flag set after InitOtherFamilyNames is called upon first name lookup miss PRPackedBool mOtherFamilyNamesInitialized; // other family name ==> family entry (not unique, can have multiple names per // family entry, only names *other* than the canonical names are stored here) nsRefPtrHashtable mOtherFamilyNames; // flag set after fullname and Postcript name lists are populated PRPackedBool mFaceNamesInitialized; // whether these are needed for a given platform PRPackedBool mNeedFullnamePostscriptNames; // fullname ==> font entry (unique, one name per font entry) nsRefPtrHashtable mFullnames; // Postscript name ==> font entry (unique, one name per font entry) nsRefPtrHashtable mPostscriptNames; // cached pref font lists // maps list of family names ==> array of family entries, one per lang group nsDataHashtable > > mPrefFonts; // 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 nsString mReplacementCharFallbackFamily; nsStringHashSet mBadUnderlineFamilyNames; // data used as part of the font cmap loading process nsTArray > mFontFamiliesToLoad; PRUint32 mStartIndex; PRUint32 mIncrement; PRUint32 mNumFamilies; }; #endif /* GFXPLATFORMFONTLIST_H_ */