GNU bug report logs -
#51
frame-title-format is built with wrong selected-frame
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Reported by: Damon Permezel <permezel <at> mac.com>
Date: Tue, 11 Mar 2008 17:55:03 UTC
Severity: normal
Done: Stefan Monnier <monnier <at> iro.umontreal.ca>
Bug is archived. No further changes may be made.
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This is an automatic notification regarding your bug report
which was filed against the emacs package:
#51: frame-title-format is built with wrong selected-frame
It has been closed by Stefan Monnier <monnier <at> iro.umontreal.ca>.
Their explanation is attached below along with your original report.
If this explanation is unsatisfactory and you have not received a
better one in a separate message then please contact Stefan Monnier <monnier <at> iro.umontreal.ca> by
replying to this email.
--
51: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=51
Emacs Bug Tracking System
Contact help-debbugs <at> gnu.org with problems
[Message part 2 (message/rfc822, inline)]
I believe this is now fixed for Emacs-23, so you can use
`selected-window' and `selected-frame' in your `frame-title-format' and
get the right window/frame out of it.
2008-03-19 Stefan Monnier <monnier <at> iro.umontreal.ca>
* xdisp.c (format_mode_line_unwind_data): Add window argument.
(unwind_format_mode_line): Restore selected window.
(x_consider_frame_title, Fformat_mode_line): Set selected window.
-- Stefan
[Message part 3 (message/rfc822, inline)]
The default naming scheme for certain emacs implementations is to use
the string in the frame-title-format which defaults to "%b". It is
thus quite easy to create many frames with the same name. Just start
emacs and hit ^x-5-2 repeatedly.
The Buffers>Frames menu thus presents a list of buffers many with the
same names. Also, any command for manipulating frames by frame names
really cannot use the name to distinguish between the frames. Note that
the Buffers>Frames cannot be used to select all the frames with the same
name when there are more than 2 with the same name. This is a bug!
In order to avoid this bug, one has to have unique frame names.
I wish to retain the "%b" functionality in the frame-title-format, so
I have attempted to construct a FORM that will be evaluated when the
frame title is desired to provide some unique element --- in this case
a F%d where the %d is the index of the frame within the (frame-list),
say.
I find that it is not possible to calculate this correctly, as I have
no means, from elisp, at the time the FORM is being evaluated, to
obtain the frame in question.
I have also tried setting a :zz-count property on the frames to
uniquely identify them, however there is no means I know of to
retrieve this property again as the frame in question is not available
to me.
I do not want to set the 'name property for the frame, as I wish to
retain the "%b" functionality, and I note that this does not work.
IE: I could arrange to set each frame's 'name to "<unique> %b" readily
enough, but then the %b is not expanded. Also, cannot set name to
anything by a string.
I have tried setting the 'frame-title-format property in a frame,
given that this is rumoured to create frame-local-variables, but this
does not seem to influence the global frame-title-format.
(setq zz-frame-count 0)
;;
;; this will put a unique :zz-count in each frame's properties
;;
(add-hook 'after-make-frame-functions
'(lambda (frame)
(progn
(modify-frame-parameters frame (list (cons :zz-count (setq zz-
frame-count (1+ zz-frame-count)))))
(message "%S" (frame-parameters frame)))))
;;
;; this attempts to set F%d to the index of the frame in the
;; frame-list, but it just does so for the current frame.
;;
(setq frame-title-format
(cons :eval
'((let ((f (next-frame (previous-frame)))
(x nil))
(format "F%d:%%b - %%F"
(apply '+ (mapcar
(lambda (_)
(if x 0
(setq x (eq _ f))
1))
(frame-list))))))
;; try the above, and then a a slew of ^x-5-2 and then cycle thru the
frames and look at the names.
I would either like to be able to have (current-frame) return the
frame for which the frame-title-format is being expanded, or I would
like to have a '%Z[pname]' (or something less revolting) expand out to
a named property for
the implicit frame, just as '%F' expands the implicit frame's name.
(setq frame-title-format "F%Z[:zz-count]:%b")
would give me "F1:*scratch*", "F2:*scratch*", ... for example.
Another solution would be to use the per-frame frame-title-format.
In GNU Emacs 22.1.50.1 (i386-apple-darwin8.11.1, Carbon Version 1.6.0)
of 2008-01-18 on seijiz.local
Windowing system distributor `Apple Inc.', version 10.5.2
configured using `configure '--prefix=/Applications/Emacs.app/
Contents/Resources' '--with-carbon' '--without-x' '--libexecdir=/
Volumes/Emacs/Emacs.app/Contents/MacOS/libexec' 'CFLAGS=-Os -arch i386
-arch ppc -isysroot /Developer/SDKs/MacOSX10.4u.sdk -DUSE_ATSUI -
DUSE_MAC_TSM''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: nil
locale-coding-system: iso-8859-1
default-enable-multibyte-characters: t
Major mode: Emacs-Lisp
Minor modes in effect:
shell-dirtrack-mode: t
encoded-kbd-mode: t
show-paren-mode: t
mac-key-mode: t
display-time-mode: t
mac-print-mode: t
tooltip-mode: t
mouse-wheel-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
unify-8859-on-encoding-mode: t
utf-translate-cjk-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
c o u n t ) C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b
C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b
C-b C-b c o n s SPC C-e C-x C-e C-] C-p C-p C-p C-p
C-p C-p C-x C-e C-n C-n C-n C-n C-n C-n C-e C-x C-e
) C-n C-n C-b C-b C-x C-e C-] C-e C-x C-e C-x C-e C-x
5 2 <switch-frame> <down-mouse-1> <mouse-movement>
<mouse-1> C-h f <return> <help-echo> C-x 1 C-x C-b
C-n SPC <down-mouse-1> <mouse-1> ( l i s t SPC C-e
) b x C-e <backspace> <backspace> C-x C-e C-] C-b C-x
C-e C-n C-n C-x C-e C-p C-p C-p C-p C-p C-p C-a C-k
C-k C-y C-y C-p C-p C-d C-d C-d C-d C-d C-d C-d C-d
C-d C-d C-d ( s e t q SPC C-e SPC n i l ) C-a ; C-e
C-x C-e C-n C-n C-n C-n C-n C-n C-n C-n C-p C-x C-e
C-x 5 2 <switch-frame> <switch-frame> <help-echo> <down-mouse-1>
<mouse-movement> <mouse-1> C-b C-b C-b C-b C-b C-b
C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b C-b
C-b C-b C-b C-b C-b C-b C-b C-b ( s r t q <backspace>
<backspace> <backspace> e t q SPC <backspace> <backspace>
<backspace> <backspace> <backspace> C-f C-f C-f C-f
C-f C-f C-f C-f C-f C-f ( s e t q SPC C-k C-y <backspace>
<backspace> <backspace> SPC ( 1 + SPC C-y <backspace>
<backspace> C-x C-e ) ) ) ) C-x C-e <down-mouse-1>
<mouse-1> <backspace> C-e C-b C-x C-e C-x C-e C-n C-n
C-p C-p C-p C-p C-p C-p C-p C-x C-e C-n C-n C-n C-n
C-n C-n C-n C-x C-e C-n C-n C-n C-n C-n C-n C-] <down-mouse-1>
<mouse-movement> <mouse-movement> <drag-mouse-1> C-x
C-x A-c <menu-bar> <help-menu> <send-emacs-bug-rep
ort>
Recent messages:
1
Entering debugger...
((:zz-count . 1))
((:zz-count . 2))
nil
((lambda (frame) (progn (select-frame-set-input-focus frame) (modify-
frame-parameters frame (list (cons :zz-count (setq zz-frame-count (1+
zz-frame-count))))) (message "%S" (frame-parameters frame)) (mwm))))
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This bug report was last modified 17 years and 119 days ago.
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