Back to index

lightning-sunbird  0.9+nobinonly
nsUnicodeMappingUtil.h
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 #include <Script.h>
00038 
00039 #include "prtypes.h"
00040 #include "nsUnicodeBlock.h"
00041 #include "nsDebug.h"
00042 #include "nscore.h"
00043 #include "nsIPref.h"
00044 
00045 class nsUnicodeFontMappingCache;
00046 class nsString;
00047 
00048  //--------------------------------------------------------------------------
00049 typedef enum {
00050  kSerif  = 0,
00051  kSansSerif,
00052  kMonospace,
00053  kCursive,
00054  kFantasy, 
00055  kUknownGenericFontName
00056 } nsGenericFontNameType;
00057 //--------------------------------------------------------------------------
00058 
00059 class nsUnicodeMappingUtil {
00060 public:
00061        nsUnicodeMappingUtil();
00062        ~nsUnicodeMappingUtil();
00063        void Init();
00064        void CleanUp();
00065        void Reset();
00066        inline ScriptCode BlockToScript(nsUnicodeBlock blockID) 
00067               { 
00068                      NS_PRECONDITION(blockID < kUnicodeBlockSize, "illegal value");
00069                      return (ScriptCode) mBlockToScriptMapping[blockID]; 
00070               };
00071        inline short ScriptFont(ScriptCode script) 
00072               { 
00073                      NS_PRECONDITION(script < smPseudoTotalScripts, "bad script code");
00074                      return  mScriptFontMapping[script]; 
00075               };            
00076        nsGenericFontNameType MapGenericFontNameType(const nsString& aGenericName);
00077        inline nsString* GenericFontNameForScript(ScriptCode aScript, nsGenericFontNameType aType) const 
00078        {
00079                      NS_PRECONDITION(aScript < smPseudoTotalScripts, "bad script code");
00080                      NS_PRECONDITION(aType <= kUknownGenericFontName, "illegal value");
00081                      if( aType >= kUknownGenericFontName)
00082                             return nsnull;
00083                      else
00084                             return mGenericFontMapping[aScript][aType]; 
00085        }
00086        
00087   ScriptCode MapLangGroupToScriptCode(const char* aLangGroup);
00088        static nsUnicodeMappingUtil* GetSingleton();
00089        static void FreeSingleton();
00090        nsString *mGenericFontMapping[smPseudoTotalScripts][kUknownGenericFontName];
00091        
00092 protected:
00093     void InitGenericFontMapping();
00094     void InitBlockToScriptMapping();
00095     void InitScriptFontMapping();
00096     void InitFromPref();
00097    
00098   static int  PR_CALLBACK_DECL PrefChangedCallback( const char* aPrefName, void* instance_data);
00099   static void PR_CALLBACK_DECL PrefEnumCallback(const char* aName, void* aClosure);
00100     
00101 private:
00102        short   mScriptFontMapping[smPseudoTotalScripts];
00103        PRInt8   mBlockToScriptMapping[kUnicodeBlockSize];
00104        nsCOMPtr<nsIPref> mPref;
00105        
00106        static nsUnicodeMappingUtil* gSingleton;
00107 
00108 };