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Re: Window configurations

From: Juri Linkov
Subject: Re: Window configurations
Date: Tue, 11 May 2010 19:45:52 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (x86_64-pc-linux-gnu)

> ... where `quit-restore-window' here replaces `quit-window' which has
> too obscure semantics for my taste.  And obviously, exiting `view-mode'
> calls `quit-restore-window' here too.

Yes, `quit-window' is useless because it doesn't help to avoid the mess
that occurs after killing buffers.  Please look at two examples:


|         |         |
| dired 1 | dired 2 |
|         |         |
|         |         |

Now view a file in dired 1, select the second window, view another file
in dired 2, select the first window, quit view-mode with `q',
select the second window, quit view-mode with `q':

  `v  C-x o  v  C-x o  q  C-x o  q'

The window configuration is exactly as was before - very good.

Now do the same without using `view-mode' - visit a file in dired 1 with
RET, select the second window, visit another file in dired 2, select the
first window, kill the buffer, select the second window, kill the buffer:

  `RET  C-x o  RET  C-x o  C-x k  C-x o  C-x k'

The window configuration is broken with original buffers exchanged
their windows:

|         |         |
| dired 2 | dired 1 |
|         |         |
|         |         |

2. Another example - visit the same buffer in two windows, and put point
at different positions of the same buffer.

|         |         |
| dired 1 | dired 1 |
|         |         |
|         |         |

Now view a file in the first window, and quit: `v q'.
The window configuration is correctly restored
(without using `set-window-configuration') - good.

Now do the same without `view-mode': `RET C-x k'.
Instead of the original buffer, some random buffer is displayed
in this window.

It seems your implementation of `quit-restore-window' will fix this problem,
but I don't see how it will work without a window history as a list?
This list could be saved as a window parameter `window-history' where each
element is like you implemented for the `quit-restore' parameter.

Then every switch-to-buffer could add a `quit-restore' element to the
window history parameter, and every kill-buffer could remove it from the
history stack (and call its function at the same time).

Juri Linkov

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