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Re: xemacs syntax highlighting problem [message #33698 is a reply to message #33572]

Thu, 16 January 2003 21:16

J. Fischer
Messages: 2
Registered: January 2003

Junior Member

Paul van Delst wrote:
> Why can't the fontification be based on a "context" buffer (dunno what the proper term
> would be). That is, you update syntax highlighting based on the immediate context of what
> surrounds the line in question? I have no idea how one would specify the extent of the
> context, though.

This wouldn't really help to improve efficiency.

> The efficiency issue Carsten mentions can be a real bugger. I use nedit and it checks the
> entire buffer every keystroke. Not usually a problem unless you have a lot of lines of
> code and you type in a string near the top of the file. The first use of ' causes all the
> following 's to be redefined and the character string syntax highlighting "flips". The
> closing ' in the line I'm typing corrects the situation but it can take a couple of
> seconds while nedit cogitates over the matter. Can be a real pain in the rear.

There is nothing wrong about checking the entire buffer. Actually, it is
the only way to get a efficient (almost) real-time and _proper_ syntax
highlighting.
This puts a higher responsibility on the patterns design, though. What
you describe is a badly designed patterns set. The patterns described by
a beginning and ending ' simply need an "error expression" to make it
stop. Confirm the NEdit documentation. You have to determine what can't
be or normally won't be (highlighting needn't be a syntax parser, it
shall only help to reduce errors) inside '' (for example if '' should be
contained in a single line, then you would give $ as error expression,
or does the language you are using have comments? Do they normally occur
inside '').

Hope you got the point.

Cheers,
Joerg

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[Message index]

		Re: xemacs syntax highlighting problem By: Paul Van Delst[1] on Thu, 16 January 2003 07:32
		Re: xemacs syntax highlighting problem By: Carsten Dominik on Thu, 16 January 2003 05:13
		Re: xemacs syntax highlighting problem By: Carsten Dominik on Thu, 16 January 2003 23:58
		Re: xemacs syntax highlighting problem By: J. Fischer on Thu, 16 January 2003 21:16
		Re: xemacs syntax highlighting problem By: s[1] on Thu, 16 January 2003 10:01

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