Thanks for your confirmation and feedback. I will file a STR, if nobody else
objects.
In the meanwhile I had a look at the FLTK UTF-8 functions and found
fl_utf8decode() useful for my problem and wrote this little
helper function:
static size_t pos_to_offset( const char *s_, size_t pos_ )
{
size_t byte_offset = 0;
if ( s_ )
{
int len;
const char *end = s_ + strlen( s_ );
while ( pos_ && s_ < end )
{
fl_utf8decode( s_, end, &len );
byte_offset += len;
s_ += len;
}
}
return byte_offset;
}
I now use
t.position(t.value(), pos_to_offset(2));
to convert UTF-8 character count to byte offset.
Cheers,
chris
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> How is it supposed to be done and is this the desired behaviour?
Hmm, I don't think that's the desired behaviour, though I can confirm that
WinXP does exactly what you describe, so...
Can you maybe post an STR for this, incuding your test example, so we don't
forget?
In the meantime, you can probably walk along your string using fl_utf8fwd() or
such to see where the "actual" character boundaries are.
Also, in the past, I have converted the entire string to UCS (i.e. 32-bit)
characters, made my insertions/deletions, then converted back to UTF8. That
might be appropriate for you here?
If so, fl_utf8towc() might be useful to you...
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