* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
@ 2012-07-02 3:21 Christopher Monsanto
2012-07-02 3:25 ` Christopher Monsanto
0 siblings, 1 reply; 7+ messages in thread
From: Christopher Monsanto @ 2012-07-02 3:21 UTC (permalink / raw)
To: 11840
Currently, if one creates two overlapping overlays that both have a
keymap property, nil elements on the high priority keymap do not
fallthrough to the lower priority overlay keymap. From emacs -Q, put the
following code in, place point at beginning of buffer, and M-x eval
buffer.
(setq m (make-sparse-keymap))
(define-key m "k" '(lambda nil (interactive) (message "overlay 1")))
(setq m2 (make-sparse-keymap))
(define-key m2 "k" nil)
(let ((o (make-overlay 0 5))
(o2 (make-overlay 0 5)))
(overlay-put o 'keymap m)
(overlay-put o 'priority 100)
(overlay-put o2 'keymap m2)
(overlay-put o2 'priority 9999))
Type k, and it will self insert instead of messaging overlay 1.
According to the Emacs manual, "The priority matters when two or more overlays cover the same character and both specify the same property; the one whose priority value is larger overrides the other." So this behavior may not strictly be a bug, but it is suboptimal in my opinion. I discovered this problem by running yasnippet and auto-complete-mode together. Yasnippet puts a low priority overlay to make tab go to the next snippet field; ac-mode puts a high priority overlay to handle tab to go to the next completion. If I hack around this by setting tab to nil on ac-mode's map when there are no completions, tab runs indent, instead of going to the next snippet field... making it very hard to compose the two programs.
In GNU Emacs 24.1.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
of 2012-07-01 on linuxpimpbox
Windowing system distributor `The X.Org Foundation', version 11.0.11103000
Important settings:
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Emacs-Lisp
Minor modes in effect:
keyfreq-autosave-mode: t
keyfreq-mode: t
savehist-mode: t
eproject-mode: t
diff-auto-refine-mode: t
TeX-PDF-mode: t
nxhtml-menu-mode: t
nxhtml-tag-do-also: t
popcmp-group-alternatives: t
popcmp-short-help-beside-alts: t
mlinks-active-links: t
paredit-mode: t
eldoc-mode: t
recentf-mode: t
smex-mode: t
ido-ubiquitous-mode: t
ido-everywhere: t
yas/global-mode: t
yas/minor-mode: t
global-auto-complete-mode: t
auto-complete-mode: t
shell-dirtrack-mode: t
global-undo-tree-mode: t
undo-tree-mode: t
cua-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
column-number-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
<left> <left> <left> <left> <left> <left> <left> <left>
<left> <left> <left> <left> <left> <left> <left> <left>
<left> C-x C-s <left> <left> ; <backspace> 6 <backspace>
' <backspace> ; x C-x C-s <backspace> C-x C-s C-x k
<return> C-b t <return> <up> <up> <up> <up> <up> <up>
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up>
<up> <up> <up> <up> <backspace> M-x <up> <return> k
k <backspace> <backspace> <backspace> <down> <up> <down-mouse-1>
<mouse-movement> <mouse-movement> <mouse-movement>
<mouse-movement> <drag-mouse-1> <backspace> <backspace>
<down-mouse-1> <mouse-1> <backspace> <right> <backspace>
<backspace> C-x C-s <down-mouse-1> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-movement> <mouse-movement> <mouse-movement>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-movement> <drag-mouse-1> <down-mouse-1> <mouse-1>
<down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> <down-mouse-1>
<mouse-movement> <mouse-movement> <drag-mouse-1> <down-mouse-1>
<mouse-1> M-x r e p o r t <return> K e y <backspace>
<backspace> <backspace> O v e r l y <backspace> a y
SPC p r o p e r t i e s <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
O V e <backspace> <backspace> <backspace> n i l SPC
o v <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> O V r <backspace> <backspace>
v r <backspace> e r l a y <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> n i
l SPC <backspace> <backspace> <backspace> <backspace>
K e y m a p s SPC f a l <backspace> <backspace> <backspace>
<backspace> <backspace> SPC f a l l t h r o u g h SPC
o n SPC h i g h SPC p n <backspace> r i o r i t y SPC
o v e r l a y SPC s h o u l d SPC f <backspace> <backspace>
SPC <help-echo> <help-echo> <down-mouse-1> <drag-mouse-1>
<help-echo> <help-echo> <backspace> <down-mouse-1>
<mouse-1> <down-mouse-1> <mouse-1> M-x <up> <retur
n>
Recent messages:
Saving file /home/monsanto/test.el...
Wrote /home/monsanto/test.el
Saving file /home/monsanto/test.el...
Wrote /home/monsanto/test.el
byte-code: Beginning of buffer [8 times]
backward-delete-char: Beginning of buffer
Saving file /home/monsanto/test.el...
Wrote /home/monsanto/test.el
Mark set [2 times]
Quit
user-error: Minibuffer window is not active
Load-path shadows:
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/home/monsanto/.emacs.d/elisp/w3m/w3m-favicon hides /usr/local/share/emacs/site-lisp/w3m/w3m-favicon
/home/monsanto/.emacs.d/elisp/w3m/w3m-proc hides /usr/local/share/emacs/site-lisp/w3m/w3m-proc
/home/monsanto/.emacs.d/elisp/w3m/w3m-filter hides /usr/local/share/emacs/site-lisp/w3m/w3m-filter
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/home/monsanto/.emacs.d/elisp/w3m/w3m-rss hides /usr/local/share/emacs/site-lisp/w3m/w3m-rss
/home/monsanto/.emacs.d/elisp/w3m/w3m-bug hides /usr/local/share/emacs/site-lisp/w3m/w3m-bug
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/home/monsanto/.emacs.d/elisp/w3m/w3m-mail hides /usr/local/share/emacs/site-lisp/w3m/w3m-mail
/home/monsanto/.emacs.d/elisp/w3m/w3m-ems hides /usr/local/share/emacs/site-lisp/w3m/w3m-ems
/home/monsanto/.emacs.d/elisp/w3m/w3m-namazu hides /usr/local/share/emacs/site-lisp/w3m/w3m-namazu
/home/monsanto/.emacs.d/elisp/w3m/bookmark-w3m hides /usr/local/share/emacs/site-lisp/w3m/bookmark-w3m
/home/monsanto/.emacs.d/elisp/w3m/octet hides /usr/local/share/emacs/site-lisp/w3m/octet
/home/monsanto/.emacs.d/elisp/w3m/w3m-antenna hides /usr/local/share/emacs/site-lisp/w3m/w3m-antenna
/home/monsanto/.emacs.d/elisp/w3m/w3m-session hides /usr/local/share/emacs/site-lisp/w3m/w3m-session
/usr/local/share/emacs/site-lisp/reftex/reftex-vars hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-vars
/usr/local/share/emacs/site-lisp/reftex/reftex-global hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-global
/usr/local/share/emacs/site-lisp/reftex/reftex hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex
/usr/local/share/emacs/site-lisp/reftex/reftex-cite hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-cite
/usr/local/share/emacs/site-lisp/reftex/reftex-toc hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-toc
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/usr/local/share/emacs/site-lisp/reftex/reftex-sel hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-sel
/usr/local/share/emacs/site-lisp/reftex/reftex-index hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-index
/usr/local/share/emacs/site-lisp/reftex/reftex-dcr hides /usr/local/share/emacs/24.1.50/lisp/textmodes/reftex-dcr
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/home/monsanto/.emacs.d/elisp/nxhtml/util/org-odt hides /usr/local/share/emacs/24.1.50/lisp/org/org-odt
/home/monsanto/.emacs.d/elisp/magit/.dir-locals hides /usr/local/share/emacs/24.1.50/lisp/gnus/.dir-locals
Features:
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multi-tty emacs)
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
2012-07-02 3:21 bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay Christopher Monsanto
@ 2012-07-02 3:25 ` Christopher Monsanto
2012-07-02 14:39 ` Stefan Monnier
2021-09-07 17:36 ` Lars Ingebrigtsen
0 siblings, 2 replies; 7+ messages in thread
From: Christopher Monsanto @ 2012-07-02 3:25 UTC (permalink / raw)
To: 11840
One more symptom, and I doubt this could be anything but a bug: if you
delete the high priority overlay, we *still* don't use the lower
priority overlay's keymap!
Try this:
(setq m (make-sparse-keymap))
(define-key m "k" '(lambda nil (interactive) (message "overlay 1")))
(setq m2 (make-sparse-keymap))
(define-key m2 "k" nil)
(let ((o (make-overlay 0 5))
(o2 (make-overlay 0 5)))
(overlay-put o 'keymap m)
(overlay-put o 'priority 100)
(overlay-put o2 'keymap m2)
(overlay-put o2 'priority 9999)
(delete-overlay o2))
eval-buffer again, and k self inserts. If we never create the second
overlay, it prints the msg.
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
2012-07-02 3:25 ` Christopher Monsanto
@ 2012-07-02 14:39 ` Stefan Monnier
2012-07-02 16:32 ` Christopher Monsanto
2021-09-07 17:36 ` Lars Ingebrigtsen
1 sibling, 1 reply; 7+ messages in thread
From: Stefan Monnier @ 2012-07-02 14:39 UTC (permalink / raw)
To: Christopher Monsanto; +Cc: 11840
> One more symptom, and I doubt this could be anything but a bug: if you
> delete the high priority overlay, we *still* don't use the lower
> priority overlay's keymap!
This is a limitation of the way properties are "merged".
More specifically, in most cases properties coming from different
overlays (and from text-properties) are *not* merged. Instead, the
property of the highest-priority overlay is used.
Stefan
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
2012-07-02 14:39 ` Stefan Monnier
@ 2012-07-02 16:32 ` Christopher Monsanto
2012-07-02 18:21 ` Stefan Monnier
0 siblings, 1 reply; 7+ messages in thread
From: Christopher Monsanto @ 2012-07-02 16:32 UTC (permalink / raw)
To: Stefan Monnier; +Cc: 11840
On Mon, Jul 2, 2012 at 10:39 AM, Stefan Monnier
<monnier@iro.umontreal.ca> wrote:
>> One more symptom, and I doubt this could be anything but a bug: if you
>> delete the high priority overlay, we *still* don't use the lower
>> priority overlay's keymap!
>
> This is a limitation of the way properties are "merged".
> More specifically, in most cases properties coming from different
> overlays (and from text-properties) are *not* merged. Instead, the
> property of the highest-priority overlay is used.
>
For the problem you cited, that seems to be irrelevant... if you
create two overlays o1 and o2, and delete o2, the editor should act
the same as if you just created o1. If not, in what sense are you
actually deleting the overlay? There should be no merge involved when
only considering one overlay.
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
2012-07-02 16:32 ` Christopher Monsanto
@ 2012-07-02 18:21 ` Stefan Monnier
0 siblings, 0 replies; 7+ messages in thread
From: Stefan Monnier @ 2012-07-02 18:21 UTC (permalink / raw)
To: Christopher Monsanto; +Cc: 11840
>>> One more symptom, and I doubt this could be anything but a bug: if you
>>> delete the high priority overlay, we *still* don't use the lower
>>> priority overlay's keymap!
>> This is a limitation of the way properties are "merged".
>> More specifically, in most cases properties coming from different
>> overlays (and from text-properties) are *not* merged. Instead, the
>> property of the highest-priority overlay is used.
> For the problem you cited, that seems to be irrelevant...
Indeed, thank you for correcting me: for the cited problem, the issue is
most likely that Emacs reads the set of active keymaps when it starts
waiting for a key-sequence, rather than when it actually sees
a key-press, so if you remove overlays via things like process-filters,
the set of keymaps used for the key-lookup may not reflect the set of
keymaps that were actually present when the key was pressed.
This one is indeed a (known) bug, rather than a limitation.
Fixing it might not be too hard, but the culprit is in read_key_sequence
which is a dreadfully intimidating function.
Stefan
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
2012-07-02 3:25 ` Christopher Monsanto
2012-07-02 14:39 ` Stefan Monnier
@ 2021-09-07 17:36 ` Lars Ingebrigtsen
2021-10-06 9:33 ` Lars Ingebrigtsen
1 sibling, 1 reply; 7+ messages in thread
From: Lars Ingebrigtsen @ 2021-09-07 17:36 UTC (permalink / raw)
To: Christopher Monsanto; +Cc: 11840
Christopher Monsanto <chris@monsan.to> writes:
> One more symptom, and I doubt this could be anything but a bug: if you
> delete the high priority overlay, we *still* don't use the lower
> priority overlay's keymap!
>
> Try this:
>
> (setq m (make-sparse-keymap))
> (define-key m "k" '(lambda nil (interactive) (message "overlay 1")))
>
> (setq m2 (make-sparse-keymap))
> (define-key m2 "k" nil)
>
> (let ((o (make-overlay 0 5))
> (o2 (make-overlay 0 5)))
> (overlay-put o 'keymap m)
> (overlay-put o 'priority 100)
> (overlay-put o2 'keymap m2)
> (overlay-put o2 'priority 9999)
> (delete-overlay o2))
>
> eval-buffer again, and k self inserts. If we never create the second
> overlay, it prints the msg.
(I'm going through old bug reports that unfortunately weren't resolved
at the time.)
I'm unable to reproduce this in Emacs 28 -- if I hit `k', I get the
message (as expected). Are you still seeing this issue in recent Emacs
versions?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 7+ messages in thread
* bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay
2021-09-07 17:36 ` Lars Ingebrigtsen
@ 2021-10-06 9:33 ` Lars Ingebrigtsen
0 siblings, 0 replies; 7+ messages in thread
From: Lars Ingebrigtsen @ 2021-10-06 9:33 UTC (permalink / raw)
To: Christopher Monsanto; +Cc: 11840
Lars Ingebrigtsen <larsi@gnus.org> writes:
> I'm unable to reproduce this in Emacs 28 -- if I hit `k', I get the
> message (as expected). Are you still seeing this issue in recent Emacs
> versions?
More information was requested, but no response was given within a
month, so I'm closing this bug report. If the problem still exists,
please respond to this email and we'll reopen the bug report.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2021-10-06 9:33 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-07-02 3:21 bug#11840: 24.1.50; nil keymap element on high priority overlay should fallthrough to low priority overlay Christopher Monsanto
2012-07-02 3:25 ` Christopher Monsanto
2012-07-02 14:39 ` Stefan Monnier
2012-07-02 16:32 ` Christopher Monsanto
2012-07-02 18:21 ` Stefan Monnier
2021-09-07 17:36 ` Lars Ingebrigtsen
2021-10-06 9:33 ` Lars Ingebrigtsen
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