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Re: Mouse highlighting and fonts

From: Johan Bockgård
Subject: Re: Mouse highlighting and fonts
Date: Tue, 27 May 2008 10:58:23 +0200
User-agent: Gnus/5.110009 (No Gnus v0.9) Emacs/23.0.60 (gnu/linux)

Chong Yidong <address@hidden> writes:

> Chong Yidong <address@hidden> writes:
>> when the cursor glyph has a nonzero lbearing or rbearing (i.e., it
>> overlaps with its neighbors), the neighboring glyphs are redrawn, and
>> this can overwrite the mouse-face highlight.  See xdisp.c:19934.
> According to the comments, this code is supposed to redraw glyphs that
> are overwritten because of the left/right overhang of the specified
> glyph string.  But I've never noticed overlapping glyphs in Emacs.
> Under what circumstances can overlapping glyphs occur?

See the thread pointed to by Stephen,


> In other words, would there be any effect from simply turning off the
> overlap-compensation code, as indicated?  Anyone know?

I had quite good results from adding `&& hl == DRAW_NORMAL_TEXT' to the

Johan Bockgård

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