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August 16, 2005
Patch for missing Chinese characters issue of Firefox on Mac OS X
Here's a simple workaround.
I disabled TEC fallback rendering, because I found it caused Chinese characters missing.
I also changed the script for CJKIdeographs to smSimpChinese to let Firefox use better font for Simplified Chinese characters in UTF-8 encoding.
Here's the result. (I use font Kai to emphasize the change.)
If you browse Traditional Chinese pages most often, you can use smTradChinese instead.
If you use smSimpChinese, Traditional Chinese pages in UTF-8 encoding may have some regressions.
See screenshot. (The font Kai emphasized the regression.)
The final solution should be to use ASTUI totally instead of QuickDraw, because QuickDraw can't support Unicode.
To use ASTUI can also solve Nepal's issue.
BTW: Some gfx/src/mac code look strange to me. For example, in nsUnicodeFontMappingMac::GetFontID(), entry->GetCCMap() never return a void pointer. Does it only work for MathML?
My Patch:
Index: nsUnicodeRenderingToolkit.cpp
===================================================================
RCS file: /cvsroot/mozilla/gfx/src/mac/nsUnicodeRenderingToolkit.cpp,v
retrieving revision 1.46
diff -u -p -8 -r1.46 nsUnicodeRenderingToolkit.cpp
--- nsUnicodeRenderingToolkit.cpp 19 Jul 2005 21:13:18 -0000 1.46
+++ nsUnicodeRenderingToolkit.cpp 16 Aug 2005 02:43:13 -0000
@@ -55,17 +55,17 @@
#include <FixMath.h>
#define BAD_FONT_NUM -1
#define BAD_SCRIPT 0x7F
#define STACK_TRESHOLD 1000
static NS_DEFINE_CID(kSaveAsCharsetCID, NS_SAVEASCHARSET_CID);
-//#define DISABLE_TEC_FALLBACK
+#define DISABLE_TEC_FALLBACK
//#define DISABLE_PRECOMPOSEHANGUL_FALLBACK
//#define DISABLE_LATINL_FALLBACK
//#define DISABLE_ATSUI_FALLBACK
//#define DISABLE_TRANSLITERATE_FALLBACK
//#define DISABLE_UPLUS_FALLBACK
#define IS_FORMAT_CONTROL_CHARS(c) ((0x2000==((c)&0xFFF0))||(0x2028==((c)&0xFFF8)))
#define IS_CONTEXTUAL_CHARS(c) ((0x0600<=(c))&&((c)<0x1000))
Index: nsUnicodeMappingUtil.cpp
===================================================================
RCS file: /cvsroot/mozilla/gfx/src/mac/nsUnicodeMappingUtil.cpp,v
retrieving revision 1.36
diff -u -p -8 -r1.36 nsUnicodeMappingUtil.cpp
--- nsUnicodeMappingUtil.cpp 13 May 2005 22:50:23 -0000 1.36
+++ nsUnicodeMappingUtil.cpp 16 Aug 2005 02:43:13 -0000
@@ -442,17 +442,17 @@ void nsUnicodeMappingUtil::InitBlockToSc
smGurmukhi, smGujarati, smOriya, smTamil,
smTelugu, smKannada, smMalayalam, smThai,
smLao, smTibetan, smGeorgian, smKorean,
smTradChinese, smEthiopic, smKhmer,
smPseudoUnicode, // for Unified Canadian Syllable
smPseudoUserDef,
// start the variable section
- smRoman, smRoman, smJapanese, smJapanese, smJapanese,
+ smRoman, smRoman, smJapanese, smJapanese, smSimpChinese, // for CJKIdeographs
smRoman
};
for(PRUint32 i= 0; i < kUnicodeBlockSize; i++)
{
mBlockToScriptMapping[i] = prebuildMapping[i];
}
}
Posted by ginn at August 16, 2005 11:07 AM
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