* bug#59862: quit-restore per window buffer
@ 2022-12-06 17:32 Juri Linkov
0 siblings, 0 replies; only message in thread
From: Juri Linkov @ 2022-12-06 17:32 UTC (permalink / raw)
To: 59862
1. C-x 4 d RET C-h C-t q q -- the bottom window is NOT deleted
2. C-x 4 d RET C-h C-t C-x k RET q -- the bottom window is deleted
3. C-x 4 d RET C-h C-n C-x k RET q -- the bottom window is NOT deleted
The accidental difference between the last two is that the former uses
`switch-to-buffer' whereas the latter uses `pop-to-buffer-same-window'.
The root of the problem is that displaying a buffer in an existing
window, or quitting a buffer in an existing window overwrites its
window parameter `quit-restore', and thus invalidates the history of
how the first window was displayed.
A partial fix that solves only the first test case above is at least
not to overwrite `quit-restore' on quitting other buffers in the same
window:
```
diff --git a/lisp/window.el b/lisp/window.el
index a11293d372a..e3b057599d5 100644
--- a/lisp/window.el
+++ b/lisp/window.el
@@ -5275,14 +5276,14 @@ quit-restore-window
(set-window-prev-buffers
window (append (window-prev-buffers window) (list entry))))
;; Reset the quit-restore parameter.
- (set-window-parameter window 'quit-restore nil)
;; Select old window.
;; If the previously selected window is still alive, select it.
(window--quit-restore-select-window quit-restore-2))
(t
;; Show some other buffer in WINDOW and reset the quit-restore
;; parameter.
- (set-window-parameter window 'quit-restore nil)
;; Make sure that WINDOW is no more dedicated.
(set-window-dedicated-p window nil)
;; Try to switch to a previous buffer. Delete the window only if
```
But the proper fix for other problems would be to replace the window
parameter `quit-restore' currently shared by all buffers in the same window
by a stack where every window buffer should keep own quit-restore data.
There is already such a stack in `window-prev-buffers', so a possible
solution would be to add quit-restore data to each buffer
in window-prev-buffers.
Alternatively, it would be nice to have an option that would prevent
overwriting the initial value of the window parameter `quit-restore',
thus `quit-restore-window' could delete the window regardless of
how many buffers were displayed in that window, like it does in case
of dedicated windows.
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2022-12-06 17:32 bug#59862: quit-restore per window buffer Juri Linkov
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