|Subject:||bug#22891: 25.0.92; set-fringe-mode with left fringe 0 breaks window width calculations on Mac OS (again)|
|Date:||Thu, 14 Apr 2016 20:19:36 +0200|
> Setting the `left-frame' frame parameter to any from 1 and up change the width of the fringe, while retaining
> the width of the text area (80 characters). However, setting it to 0 makes the text area wrap on 79 characters
> (despite there being space for the 80:th character) while `window-width' still returns 80.
This is all as expected: setting any of the fringes to zero requires
displaying a continuation glyph in the text area, and since Emacs
supports bidirectional display, we need to usurp one character cell
from the other edge of the window as well, to make the geometry of L2R
and R2L screen lines symmetrical.
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