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bug#20206: 25.0.50; [PATCH] keep diff-mode's window visible when we visi

From: Dima Kogan
Subject: bug#20206: 25.0.50; [PATCH] keep diff-mode's window visible when we visit sources from diff-mode
Date: Sat, 28 Mar 2015 14:44:14 -0700

martin rudalics <address@hidden> writes:

> You can switch this off by customizing `display-buffer-base-action'
> accordingly.
>  > OK, but if the larger question is now on the table, (about what should
>  > (pop-to-buffer) and (display-buffer) do by default), we should probably
>  > answer that first.
> Can you tell me whether and how `display-buffer-in-previous-window' is
> used in the `diff-mode' scenario (I use a highly customized `ediff-mode'
> so I can't easily check that myself).  Does it use `switch-to-buffer'?

The diff-mode scenario is the same as the other example. M-enter invokes
(diff-goto-source), which invokes (pop-to-buffer), which invokes
(display-buffer). Here's the previous example, but using diff-mode
instead. Assuming "dat" and "dat.patch" exist in the current directory

emacs -Q --eval '(progn

  (find-file "dat")
  (find-file "dat.patch")        # open both files; one window/frame
  (split-window-horizontally)    # two windows; both show "dat.patch"
  (other-window 1)               # switch to right window
  (switch-to-buffer "asdf")      # switch to dummy "asdf" buffer
  (other-window 1)               # left window active with "dat.patch",
                                 # right shows "asdf"

  (switch-to-buffer "dat")
  (switch-to-buffer "dat.patch") # left window: show "dat" and then back
                                 # to "dat.patch"

  (diff-goto-source))            # navigate to the diff source

In emacs23 the "dat" buffer is shown in the window OTHER than the one
showing the diff. In emacs24, the diff window is covered up.

Attachment: dat
Description: Binary data

Attachment: dat.patch
Description: Binary data

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