geting line number from extending gcode.

There is no universal way to do this. Any highlighting is done by the display screen being used, not by linuxcnc.
You could surely program gladevcp's sourceview widget to search for and highlight whatever you want but it would require custom coding - AXIS would be more difficult.

but gladevcp sourcview does use color coding for gcode and possible you could use that to at least color the gcode differently. I'm sorry I don't have a reference for that - but you might check linuxcnc's wiki or google.

Chris M

As i know, gladevcp sourceview use "motion_line" in module linuxcnc python interface to get executing line of gcode. And this stat is created somewhere

yes linuxcnc's status messages are used in gladevcp, but I don't actually know where it originates from, but possibly motion.

Chris M