Bugs item #1365392, was opened at 2005-11-24 01:06
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Category: Scintilla
Group: Bug
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Asian string display question in Win 9x English
Initial Comment:
Hi all,
Question: Asian string cannot be displayed normally in
Win 9x English, even though you set the codepage and
charset correctly.
Scintilla version: v1.66.
Reproduce: 98SE English + IE6 SP1 update with CJK
display and input support, then you can load a file
with encoding Chinese/Japanese.
With the ANSI encoding file, SciTE cannot display the
file content normally.
But with the UTF-8 encoding file, SciTE can display
the file content normally.
My solution:
Scintilla Platwin.cxx file
SurfaceImpl::DrawTextNoClip, DrawTextClipped,
DrawTextTransparent functions uses ExtTextOut API.
If I convert the string from ANSI to Unicode then call
ExtTextOutW, this question is cleared.
To avoid possible performance impact in NT/2K/XP and 8-
bit codepage file, the following method may be better.
if(IsNT() || nCodePage==0){
::ExtTextOut(hdc, rc.left, ybase, ETO_OPAQUE,
&rcw, s,
Platform::Minimum(len, maxLenText), NULL);
} else {
// Support asian string display in 9x English
wchar_t tbuf[MAX_US_LEN];
int wStrSize=MultiByteToWideChar(nCodePage, 0, s, -
1, NULL, 0);
MultiByteToWideChar(nCodePage, 0, s, -1, tbuf,
wStrSize);
::ExtTextOutW(hdc, rc.left, ybase, ETO_OPAQUE,
&rcw, tbuf,
wStrSize, NULL);
}
But this patch will bring other questions:
1. The cursor move is incorrect, sometimes jump two
Chinese words (four bytes);
2. The text cannot be selected except line EOL area;
3. When selecting, the string will be refreshed and
changed.
The updated PlatWin.cxx file is attached.
Jeffrey Ren
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