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bug#19468: 25.0.50; UI inconveniences with M-.

From: Dmitry Gutov
Subject: bug#19468: 25.0.50; UI inconveniences with M-.
Date: Tue, 30 Dec 2014 21:38:47 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:33.0) Gecko/20100101 Thunderbird/33.0

On 12/30/2014 10:19 AM, Helmut Eller wrote:

For me, opening the file the first time is a bit slow, but after that
moving up and down is instantaneous.

Same here.

I didn't implement that.  It's because of the save-window-excursion in
xref--next-line that Dmitry added.  In my proposal the other window
didn't change when the cursor didn't move.

This is a possibly hacky execution of the following idea: I can move up and down the lines and see their buffers displayed, but if I haven't pressed RET, I should be able to press `q' and the window configuration should return to just the way it was before `xref-find-definitions' was called.

But not if the user modifier the window configuration in other ways, while *xref* buffer was open, or if the user switches to an existing *xref* buffer again after burying it.

Suggestions for a better implementation are welcome. Should we mess around with `window-configuration-change-hook'?

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