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jEdit Modes: Am I using at_word_start right?
Submitted by hurricanedavid on Wednesday, 2 April, 2014 - 16:50
I have a basic edit mode I'm creating and I want to make words bold when they have asterisks around them. This does it, but I'd rather have it work only if the * is right next to a word. The docs seem to say I can do it this way.

< SPAN TYPE="KEYWORD1" NO_LINE_BREAK="TRUE" AT_WORD_START="TRUE" >
< BEGIN >*< /BEGIN >
< END >*< /END >
< /SPAN >

In other words, I want *this to be bold*
But * this should not be bold *
Right now, both are getting bolded.

Thanks!
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Work-around
by hurricanedavid on Fri, 11/04/2014 - 20:52
Folks on the email list suggested I switch to the span_regexp tag instead. This works to get the start right, but if I omit the ending asterisk, this still applies the KEYWORD1 to it. But right now, I'll take what I can get.

<SPAN_REGEXP TYPE="KEYWORD1" HASH_CHAR="*" NO_LINE_BREAK="TRUE">
<BEGIN>\*\b</BEGIN>
<END>*</END>
</SPAN_REGEXP>
 
Positive Lookahead to the rescue
by Vampire on Thu, 15/05/2014 - 10:24
As you do not support line breaks, you can simply use a positive lookahead like so:

<SPAN_REGEXP TYPE="KEYWORD1" HASH_CHAR="*" NO_LINE_BREAK="TRUE">
    <BEGIN>\*\b(?=.*\b\*)</BEGIN>
    <END>*</END>
</SPAN_REGEXP>

This will at least not highlight from the sole asterisk on a line to the end but only match if there is another asterisk that follows a word immediately. Unfortunately the tag does not support regexps, so it will highlight "*bar *" in "foo *bar * baz* bam", but only if the third asterisk is present.
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