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Subject: |
Overlay keymap and timers |
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Date: |
Sat, 8 Aug 2009 12:24:51 +0300 |
Hi folks,
I identified a possible bug, just wondering if there's a known
workaround. Please CC me in any reply as I'm not subscribed to the
list.
Short description
=================
When creating overlays in a function called by run-with-timer,
their keymap becomes available only *after* some key has been
pressed.
Sample code
===========
(setq counter 0)
(setq my-keymap (make-sparse-keymap))
(define-key my-keymap (kbd "M-n")
(lambda()
(interactive)
(message "Got it %s!" (setq counter (+ counter 1)))))
(defun my-highlight ()
(interactive)
(save-excursion
(beginning-of-buffer)
(while (search-forward-regexp "\\<overlay\\>" nil t)
(let ((overlay (make-overlay (- (point) 7) (point))))
(overlay-put overlay 'face 'highlight)
(overlay-put overlay 'evaporate t)
;; using 'local-map doesn't make any difference
(overlay-put overlay 'keymap my-keymap)
(overlay-put overlay 'my-property t)))))
(defun my-highlight-with-timer ()
(interactive)
(run-with-timer 0.5 nil 'my-highlight))
(defun my-highlight-clear ()
(interactive)
(remove-overlays (point-min) (point-max) 'my-property t))
Eval this code, then type "overlay" in some buffer and move the caret
somewhere in the middle of the word.
* Case 1. M-x my-highlight. The word gets colored. If you press M-n,
it will display "Got it 1!" in the minibuffer -- works as expected.
Now clear it with M-x my-highlight-clear.
* Case 2. M-x my-highlight-with-timer. After half a second, the word
gets colored. If we immediately press M-n now, we get "M-n is
undefined". However, pressing M-n a second time works.
Clear it again with my-highlight-clear.
* Case 3. M-x my-highlight-with-timer, then press some key such as C-f
(make sure the cursor doesn't leave the overlay). Then pressing M-n
works as expected.
My guess is that the keymap becomes active the moment a key is released
(?) (or in some post-command-hook?) and the cursor is within the
overlay. So if set without a timer, it gets a chance to be activated
straight away, but with a timer there isn't any key release to trigger
it so it becomes active only after some key has been pressed.
Not sure if this is a bug, but it's sure annoying and I've no idea how
to work around it. Any help is appreciated.
Cheers,
-Mihai
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--- Begin Message ---
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Subject: |
Re: bug#10459: Overlay keymaps ignored until point is moved when overlay is created from timer |
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Date: |
Sun, 05 Oct 2014 05:21:25 +0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.93 (gnu/linux) |
Version: 24.4
> On Sun, Jan 08, 2012 at 10:52:54PM -0500, Stefan Monnier wrote:
>> Yes, this is a known limitation: the set of active keymaps is computed
>> before waiting for the next key sequence.
This has been fixed around the start of 24.4 development: the set of
keymaps is recomputed at the start of a key sequence.
The examples in this and merged bugs work for me now. Please feel free
to reopen if you see a case where the problem's not fixed.
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