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225 lines
9.0 KiB
C++
225 lines
9.0 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla Corporation code.
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*
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* The Initial Developer of the Original Code is Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2008-2009
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jonathan Kew <jfkthame@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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 "nsHashSets.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 "mozilla/FunctionTimer.h"
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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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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_TIME_FUNCTION;
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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 = nsnull;
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}
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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 PRBool 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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void GetFontFamilyList(nsTArray<nsRefPtr<gfxFontFamily> >& aFamilyArray);
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gfxFontEntry* FindFontForChar(const PRUint32 aCh, gfxFont *aPrevFont);
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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, PRBool& aNeedsBold);
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PRBool 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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PRBool NeedFullnamePostscriptNames() { return mNeedFullnamePostscriptNames; }
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// pure virtual functions, to be provided by concrete subclasses
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// get the system default font
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virtual gfxFontEntry* GetDefaultFont(const gfxFontStyle* aStyle,
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PRBool& aNeedsBold) = 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 PRUint8 *aFontData,
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PRUint32 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 PRBool GetStandardFamilyName(const nsAString& aFontName, nsAString& aFamilyName);
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protected:
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gfxPlatformFontList(PRBool aNeedFullnamePostscriptNames = PR_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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// 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 PRBool RunLoader();
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virtual void FinishLoader();
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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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PRPackedBool mOtherFamilyNamesInitialized;
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// flag set after fullname and Postcript name lists are populated
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PRPackedBool mFaceNamesInitialized;
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// whether these are needed for a given platform
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PRPackedBool mNeedFullnamePostscriptNames;
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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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// 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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nsString mReplacementCharFallbackFamily;
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nsStringHashSet mBadUnderlineFamilyNames;
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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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PRUint32 mStartIndex;
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PRUint32 mIncrement;
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PRUint32 mNumFamilies;
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};
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#endif /* GFXPLATFORMFONTLIST_H_ */
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