Re: Selection threshold with mouse

[Barry Margolin <barmar@alum.mit.edu>]

In article <mailman.5704.1405791121.1147.help-gnu-emacs@gnu.org>,
 Drew Adams <drew.adams@oracle.com> wrote:

> > When I set region using mouse from left to right, region expands at
> > very end of each character.  Is it possible to set to threshold to the
> > middle of a character instead of very end of a character?
> 
> Not too sure what you mean, but the region (selection) is the
> sequence of characters between two buffer positions (point and mark).
> 
> Emacs buffer positions are always between characters (or before the
> first character or after the last character).  They are never "on" a
> character.

To expand on this, it's essentially the same as selecting a character 
with the mouse. If you click on a character, the cursor will be put on 
that character. But when the cursor is "on" a character, the point is 
actually to the left of that character -- if you set the mark and then 
move left, the highlighted character is not in the region.

So swiping works consistently with selecting a character. When you swipe 
to the right, the rightmost character isn't included in the region until 
you reach the space between it and the next character. When you swipe to 
the left, the character is included in the region as soon as you go past 
the space between it and the next character.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
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