GtkSourceView: highlighting problems

Hi all,

I try to use GtkSourceView for highlighting the "quote levels" in an email  
message using two different colours. Usually, a MUA inserts a ">" at the  
beginning of the line to mark it as quoted. If a quoted message gets  
quoted again, ">" chars accumulate at the beginning of each line,  
depending upon the mua used sometimes separated by spaces.

I use the following code snipplet to add a GtkTextTag for "Quote-1" (k ==  
1) to "Quote-9" (k == 9) to a GtkSourceTagTable:

<snip>
     tag_id = g_strdup_printf("Quote-%d", k);
     if (k == 1)
       pattern = g_strdup("^> ?($|[^|>:}#])");
     else
       pattern = g_strdup_printf("^(> ?){%d}($|[^|>:}#])", k);
     text_tag = gtk_line_comment_tag_new(tag_id, tag_id, pattern);
</snip>

The re's contain other chars for higher quote levels, as other mua's may  
use them. As the resulting code shall be used in a mua's composer which  
*always* inserts ">", they should be fine.

I attach a screenshot to illustrate the result GtkSourceView produces. As  
you can see, the re mechanism apparently fails for /some/ cases. However,  
I cannot see that the re's are incorrect. Any idea what went wrong here,  
and how I could achieve a correct behaviour?

Tia,
Cheers,

Albrecht.


-- 
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