|Subject:||bug#16431: 24.3.50; `follow-adjust-windows' sometimes fails (patch included)|
|Date:||Thu, 16 Jan 2014 16:51:50 +0100|
> One thing still seems to be problematic -- `follow-adjust-window' only workIndeed, I was tempted to add a (cl-assert (eq win (selected-window))) or
> properly when `win' is *selected*.
to remove the `win' argument altogether. I didn't do it mostly because
I remembered that we're in feature freeze.
> In other words, that I would like to see is the following:I don't understand why you'd want to compute source-pos while outside of
> (let ((source-pos ....))
> (with-current-buffer (window-buffer win)
> (goto-char source-pos)
> (follow-adjust-window win)))
> When windows are aligned, Follow mode does not set the window start or doIn my suggested approach, when windows are aligned, after each call to
> anything else to disturb the redisplay.
redisplay-window, window-end is cheap (since it was just computed and is
hence marked as up-to-date) and since the windows are already properly
aligned you'd find that window-start does not need to be updated, which
in turn would ensure that the next redisplay-window is also cheap.
My intention would be for redisplay-window to only update the matrices
> In this scenario it would definitively help if there were a "window-only
> redisplay" or, even better, a "silent redisplay" that would calculate where
> the window would end up, but not actually draw anything. (Here, I must
> admit that my knowledge of the display engine is limited.)
(i.e. the internal representation of the rendered window) and let the
subsequent full redisplay deal with updating the display. My
knowledge of the display engine is also limited, but I think such
a redisplay-window function should not be too hard to write.
|[Prev in Thread]||Current Thread||[Next in Thread]|