home *** CD-ROM | disk | FTP | other *** search
- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * The contents of this file are subject to the Netscape Public License
- * Version 1.0 (the "NPL"); you may not use this file except in
- * compliance with the NPL. You may obtain a copy of the NPL at
- * http://www.mozilla.org/NPL/
- *
- * Software distributed under the NPL is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- * for the specific language governing rights and limitations under the
- * NPL.
- *
- * The Initial Developer of this code under the NPL is Netscape
- * Communications Corporation. Portions created by Netscape are
- * Copyright (C) 1998 Netscape Communications Corporation. All Rights
- * Reserved.
- */
-
- // ===========================================================================
- // UUTF8TextHandler.cp
- // ===========================================================================
- //
- // Authror: Frank Tang ftang@netscape.com
- #include "UUTF8TextHandler.h"
- #include "UUnicodeTextHandler.h"
-
- UUTF8TextHandler* UUTF8TextHandler::fTheOnlyInstance = NULL;
- UUTF8TextHandler* UUTF8TextHandler::Instance()
- {
- if(fTheOnlyInstance == NULL)
- fTheOnlyInstance = new UUTF8TextHandler();
- return fTheOnlyInstance;
- }
-
- #define MXS(c,x,s) (((c) - (x)) << (s))
- #define M80S(c,s) MXS(c,0x80,s)
- #define UTF8_1_to_UCS2(in) ((uint16) (in)[0])
- #define UTF8_2_to_UCS2(in) ((uint16) (MXS((in)[0],0xC0, 6) | M80S((in)[1], 0)))
- #define UTF8_3_to_UCS2(in) ((uint16) (MXS((in)[0],0xE0,12) | M80S((in)[1], 6) | M80S((in)[2], 0) ))
- uint32 UUTF8TextHandler::UTF8ToUCS2(unsigned char* text, int length, INTL_Unicode *ucs2, uint32 ubuflen)
- {
- unsigned char* p = text;
- unsigned char* last = text + length;
- uint32 ul;
- for(p = text, ul = 0; (p < last) && (ul < ubuflen) ; )
- {
- if( (*p) < 0x80)
- {
- ucs2[ul++] = UTF8_1_to_UCS2(p);
- p += 1;
- }
- else if( (*p) < 0xc0 )
- {
- Assert_( (*p) ); // Invalid UTF8 First Byte
- ucs2[ul++] = '?';
- p += 1;
- }
- else if( (*p) < 0xe0)
- {
- ucs2[ul++] = UTF8_2_to_UCS2(p);
- p += 2;
- }
- else if( (*p) < 0xf0)
- {
- ucs2[ul++] = UTF8_3_to_UCS2(p);
- p += 3;
- }
- else if( (*p) < 0xf8)
- {
- ucs2[ul++] = '?';
- p += 4;
- }
- else if( (*p) < 0xfc)
- {
- ucs2[ul++] = '?';
- p += 5;
- }
- else if( (*p) < 0xfe)
- {
- ucs2[ul++] = '?';
- p += 6;
- }
- else
- {
- Assert_( (*p) ); // Invalid UTF8 First Byte
- ucs2[ul++] = '?';
- p += 1;
- }
- }
- return ul;
- }
- void UUTF8TextHandler::DrawText(UFontSwitcher* fs, char* text, int len)
- {
- if(text[0] != 0)
- {
- uint32 ucs2len;
- INTL_Unicode ucs2buf[512];
- ucs2len = UTF8ToUCS2((unsigned char*)text, len, ucs2buf, 512);
- // redirect to the UUnicodeTextHandler
- UUnicodeTextHandler::Instance()->DrawUnicode(fs, ucs2buf, ucs2len);
- }
- }
- short UUTF8TextHandler::TextWidth(UFontSwitcher* fs, char* text, int len)
- {
- if(text[0] != 0)
- {
- uint32 ucs2len;
- INTL_Unicode ucs2buf[512];
- // redirect to the UUnicodeTextHandler
- ucs2len = UTF8ToUCS2((unsigned char*)text, len, ucs2buf, 512 );
- return UUnicodeTextHandler::Instance()->UnicodeWidth(fs, ucs2buf, ucs2len);
- }
- return 0;
- }
- void UUTF8TextHandler::GetFontInfo (UFontSwitcher* fs, FontInfo* fi)
- {
- // redirect to the UUnicodeTextHandler
- UUnicodeTextHandler::Instance()->GetFontInfo(fs, fi);
- }
-