How ANSI character map should behave on multibyte code pages

[Sam Bliss]

Vincent Snijders,
You know,  charactermapdlg.pas-5.zip can not work very well (see bug report note id #0029399 and screen shot charactermapdlg.pas-5.PNG).

For charactermapdlg.pas-5,
when I move my mouse on #$80..#$FE,
it shows incorrect Decimal and Hex number!
ASCII Dec Hex UTF-8 Display as (see the screen shot)
129   63  3F  C281  square
130   63  3F  C282  square
131   63  3F  C283  square
...   ... ... ...   ...
159   63  3F  C29F  quuare
160   63  3F  C2A0  space
161   63  3F  C2A1  letter i
162   51  33  C2A2  letter c with a line
163   52  34  C2A3  letter L with a line
164   161 A1  C2A4  small square
165   54  36  C2A5  letter Y with two lines
166   63  3F  C2A6  spilliter
167   161 A1  C2A7  two letter S's
168   161 A1  C2A8  two dots
169   63  3F  C2A9  letter C with circle
170   63  3F  C2AA  small number 2
171   63  3F  C2AB  two "less than" characters
...   ... ... ...   ...

Snapshot here
You said in the bug note:

I committed the last patch. Thanks.

I don't know what patch did you use,
Maybe use charactermapdlg-4.zip is better.
charactermapdlg.pas.diff.fixcrash.zip does not work, too.

Re: theo

Code: Pascal  [Select][+][-]

1. CharOrd := Ord(UTF8ToAnsi(StringGrid1.Cells[Col, Row])[1]);

Character #128..#255 need 2 bytes in UTF-8.
We need to convert UTF-8 to Unicode, then convert to ANSI,
or Col*16+Row-17.
Please test it by yourself, is it OK?

So, if you think, these patches are all not perfect, please tell us, let us write a new patch.
In my opinion, use Patch 4 is great.

[theo]

charactermapdlg.pas.diff.fixcrash.zip does not work, too.

Is the IDE still crashing?

[Sam Bliss]

Let me think,
this patch is yours right?
I said the thing wrong here

Re: theo

Code: Pascal  [Select][+][-]

1. CharOrd := Ord(UTF8ToAnsi(StringGrid1.Cells[Col, Row])[1]);

Character #128..#255 need 2 bytes in UTF-8.
We need to convert UTF-8 to Unicode, then convert to ANSI,
or Col*16+Row-17.
Please test it by yourself, is it OK?

[Sam Bliss]

Still now,
there's only one patch works!
No.4 Patch.

[Vincent Snijders]

What is wrong there?

What does AnsiToUTF8(#200) return for your codepage? Doesn't it return the empty string?

[Sam Bliss]

Yes!

[Sam Bliss]

Code: Pascal  [Select][+][-]

1. UTF8Encode(WideChar(#200));

This works.
Look at the caption of two forms in screen shots.

[Vincent Snijders]

I committed charactermapdlg.pas.diff.fixcrash.zip.

I still don't understand what causes the crash then (You say it doesn't work). The lower half of the ansi table is empty and not used anymore for your code page.

[theo]

@Sam Bliss:

Your bug report was:

When I use ANSI charactor map and put the mouse on 0000128..0000255,
the dialog shows.
                  Lazarus
============================================
Access voilation.

Press OK to ignore and risk data corruption.
Press Cancel to kill the program.
============================================

Does this still happen as of SVN version 21089    ?

[Sam Bliss]

Sorry, I have not downloaded SVN version 21089.
If you have, give me the oringal code of charactermapdlg.pas,
I will test it.

[Vincent Snijders]

You can get it from: http://svn.freepascal.org/cgi-bin/viewvc.cgi/trunk/ide/charactermapdlg.pas?revision=21089&root=lazarus

[Sam Bliss]

I mean when you move you mouse on #$80..#$FE,
the label under the string grid shows incorrect ASCII code.

[theo]

But that was not your original bug report. You said it crashes. Does it still?

[Sam Bliss]

I tried.
See attached files.

[Vincent Snijders]

What is wrong about that?

What codepage do you use?