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* bug#40859: Clicking the wrap-prefix string inside a button causes an error
@ 2020-04-26  3:40 Clément Pit-Claudel
  2020-04-26 13:43 ` Eli Zaretskii
  0 siblings, 1 reply; 6+ messages in thread
From: Clément Pit-Claudel @ 2020-04-26  3:40 UTC (permalink / raw)
  To: 40859

Hi all,

The following snippet inserts a button with a long label and a wrap-prefix.  Clicking the prefix causes an error, whose backtrace is shown below.

(with-current-buffer (get-buffer-create "*button*")
  (erase-buffer)
  (insert-text-button
   (let ((str "long long long long text "))
     (concat str str str str str))
   'follow-link t
   'action (lambda (&rest args) (print args))
   'wrap-prefix "this is the wrap prefix")
  (pop-to-buffer (current-buffer)))

Debugger entered--Lisp error: (void-function nil)
  nil(("this is the wrap prefix" . 9))
  button-activate(("this is the wrap prefix" . 9) t)
  push-button((mouse-2 (#<window 13 on *button*> 81 (76 . 29) 379842354 ("this is the wrap prefix" . 9) 81 (9 . 1) nil (4 . 12) (8 . 17))))
  funcall-interactively(push-button (mouse-2 (#<window 13 on *button*> 81 (76 . 29) 379842354 ("this is the wrap prefix" . 9) 81 (9 . 1) nil (4 . 12) (8 . 17))))
  call-interactively(push-button nil nil)
  command-execute(push-button)

Cheers,
Clément.

In GNU Emacs 28.0.50 (build 5, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo version 1.15.10)
 of 2020-03-15 built on clem-w50-mint
Repository revision: 9dccaf8a5cdb10dae597345ec3741475477a7d97
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Linux Mint 19.3

Recent messages:
Mark set
#<buffer *button*>
button-activate: Symbol’s function definition is void: nil
Debug on Error enabled globally
Entering debugger...
Mark set [2 times]
Saved text until "nil nil)
  command-execute(push-button)
"
Mark set

Configured features:
XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS LIBSYSTEMD
JSON PDUMPER LCMS2 GMP

Important settings:
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  value of $LC_NUMERIC: en_DK.UTF-8
  value of $LC_TIME: en_DK.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
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  electric-indent-mode: t
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  tool-bar-mode: t
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  auto-composition-mode: t
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Load-path shadows:
None found.

Features:
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backquote threads dbusbind inotify lcms2 dynamic-setting
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Memory information:
((conses 16 57304 5023)
 (symbols 48 7631 1)
 (strings 32 18904 1618)
 (string-bytes 1 584373)
 (vectors 16 10294)
 (vector-slots 8 143875 8980)
 (floats 8 30 160)
 (intervals 56 309 0)
 (buffers 1000 14))





^ permalink raw reply	[flat|nested] 6+ messages in thread

* bug#40859: Clicking the wrap-prefix string inside a button causes an error
  2020-04-26  3:40 bug#40859: Clicking the wrap-prefix string inside a button causes an error Clément Pit-Claudel
@ 2020-04-26 13:43 ` Eli Zaretskii
  2020-04-26 15:59   ` Clément Pit-Claudel
  2020-04-26 16:44   ` Clément Pit-Claudel
  0 siblings, 2 replies; 6+ messages in thread
From: Eli Zaretskii @ 2020-04-26 13:43 UTC (permalink / raw)
  To: Clément Pit-Claudel; +Cc: 40859

> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
> Date: Sat, 25 Apr 2020 23:40:38 -0400
> 
> The following snippet inserts a button with a long label and a wrap-prefix.  Clicking the prefix causes an error, whose backtrace is shown below.

Isn't that a cockpit error?





^ permalink raw reply	[flat|nested] 6+ messages in thread

* bug#40859: Clicking the wrap-prefix string inside a button causes an error
  2020-04-26 13:43 ` Eli Zaretskii
@ 2020-04-26 15:59   ` Clément Pit-Claudel
  2020-04-26 16:44   ` Clément Pit-Claudel
  1 sibling, 0 replies; 6+ messages in thread
From: Clément Pit-Claudel @ 2020-04-26 15:59 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 40859

On 26/04/2020 09.43, Eli Zaretskii wrote:
>> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
>> Date: Sat, 25 Apr 2020 23:40:38 -0400
>>
>> The following snippet inserts a button with a long label and a wrap-prefix.  Clicking the prefix causes an error, whose backtrace is shown below.
> 
> Isn't that a cockpit error?

Nope, I think not.  It's button.el getting confused about where the click came from.  And it's not fixable from the cockpit, I think, since wrap-prefixes and other replacing display specs can't have extra properties like an 'action that would make button.el happy.





^ permalink raw reply	[flat|nested] 6+ messages in thread

* bug#40859: Clicking the wrap-prefix string inside a button causes an error
  2020-04-26 13:43 ` Eli Zaretskii
  2020-04-26 15:59   ` Clément Pit-Claudel
@ 2020-04-26 16:44   ` Clément Pit-Claudel
  2020-04-26 18:27     ` Clément Pit-Claudel
  1 sibling, 1 reply; 6+ messages in thread
From: Clément Pit-Claudel @ 2020-04-26 16:44 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 40859

[-- Attachment #1: Type: text/plain, Size: 408 bytes --]

On 26/04/2020 09.43, Eli Zaretskii wrote:
>> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
>> Date: Sat, 25 Apr 2020 23:40:38 -0400
>>
>> The following snippet inserts a button with a long label and a wrap-prefix.  Clicking the prefix causes an error, whose backtrace is shown below.
> 
> Isn't that a cockpit error?

Here's a tentative patch, but I can't claim to understand the button.el code well :/

[-- Attachment #2: 0001-Only-treat-display-strings-as-buttons-if-they-have-a.patch --]
[-- Type: text/x-patch, Size: 1400 bytes --]

From 11034798933a1e0c9498b0409cd463acb822f2d3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Pit-Claudel?= <clement.pitclaudel@live.com>
Date: Sun, 26 Apr 2020 12:41:42 -0400
Subject: [PATCH] Only treat display strings as buttons if they have a 'button
 property

* lisp/button.el (push-button): Use posn-point instead of posn-string
if the string doesn't have a 'button property (Bug#40859).
---
 lisp/button.el | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lisp/button.el b/lisp/button.el
index b3afc4eca2..c33a3e8ac2 100644
--- a/lisp/button.el
+++ b/lisp/button.el
@@ -469,10 +469,12 @@ push-button
       ;; POS is a mouse event; switch to the proper window/buffer
       (let ((posn (event-start pos)))
 	(with-current-buffer (window-buffer (posn-window posn))
-	  (if (posn-string posn)
-	      ;; mode-line, header-line, or display string event.
-	      (button-activate (posn-string posn) t)
-	    (push-button (posn-point posn) t))))
+          (let* ((str (posn-string posn))
+                 (str-button (get-text-property (cdr str) 'button (car str))))
+	    (if (and str str-button)
+	        ;; mode-line, header-line, or display string event.
+	        (button-activate str t)
+	      (push-button (posn-point posn) t)))))
     ;; POS is just normal position
     (let ((button (button-at (or pos (point)))))
       (when button
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* bug#40859: Clicking the wrap-prefix string inside a button causes an error
  2020-04-26 16:44   ` Clément Pit-Claudel
@ 2020-04-26 18:27     ` Clément Pit-Claudel
  2020-05-09  7:43       ` Eli Zaretskii
  0 siblings, 1 reply; 6+ messages in thread
From: Clément Pit-Claudel @ 2020-04-26 18:27 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 40859

[-- Attachment #1: Type: text/plain, Size: 498 bytes --]

On 26/04/2020 12.44, Clément Pit-Claudel wrote:
> On 26/04/2020 09.43, Eli Zaretskii wrote:
>>> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
>>> Date: Sat, 25 Apr 2020 23:40:38 -0400
>>>
>>> The following snippet inserts a button with a long label and a wrap-prefix.  Clicking the prefix causes an error, whose backtrace is shown below.
>>
>> Isn't that a cockpit error?
> 
> Here's a tentative patch, but I can't claim to understand the button.el code well :/

A slightly revised version.


[-- Attachment #2: 0001-Only-treat-display-strings-as-buttons-if-they-have-a.patch --]
[-- Type: text/x-patch, Size: 1400 bytes --]

From fd57a05b6598de77dbf9a7ba66a15dc1cd9568a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Pit-Claudel?= <clement.pitclaudel@live.com>
Date: Sun, 26 Apr 2020 12:41:42 -0400
Subject: [PATCH] Only treat display strings as buttons if they have a 'button
 property

* lisp/button.el (push-button): Use posn-point instead of posn-string
if the string doesn't have a 'button property (Bug#40859).
---
 lisp/button.el | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lisp/button.el b/lisp/button.el
index b3afc4eca2..3a6a6de774 100644
--- a/lisp/button.el
+++ b/lisp/button.el
@@ -469,10 +469,12 @@ push-button
       ;; POS is a mouse event; switch to the proper window/buffer
       (let ((posn (event-start pos)))
 	(with-current-buffer (window-buffer (posn-window posn))
-	  (if (posn-string posn)
-	      ;; mode-line, header-line, or display string event.
-	      (button-activate (posn-string posn) t)
-	    (push-button (posn-point posn) t))))
+          (let* ((str (posn-string posn))
+                 (str-button (and str (get-text-property (cdr str) 'button (car str)))))
+	    (if str-button
+	        ;; mode-line, header-line, or display string event.
+	        (button-activate str t)
+	      (push-button (posn-point posn) t)))))
     ;; POS is just normal position
     (let ((button (button-at (or pos (point)))))
       (when button
-- 
2.17.1


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* bug#40859: Clicking the wrap-prefix string inside a button causes an error
  2020-04-26 18:27     ` Clément Pit-Claudel
@ 2020-05-09  7:43       ` Eli Zaretskii
  0 siblings, 0 replies; 6+ messages in thread
From: Eli Zaretskii @ 2020-05-09  7:43 UTC (permalink / raw)
  To: Clément Pit-Claudel; +Cc: 40859-done

> From: Clément Pit-Claudel <cpitclaudel@gmail.com>
> Cc: 40859@debbugs.gnu.org
> Date: Sun, 26 Apr 2020 14:27:48 -0400
> 
> A slightly revised version.

Thanks, pushed to the master branch.





^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2020-05-09  7:43 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-04-26  3:40 bug#40859: Clicking the wrap-prefix string inside a button causes an error Clément Pit-Claudel
2020-04-26 13:43 ` Eli Zaretskii
2020-04-26 15:59   ` Clément Pit-Claudel
2020-04-26 16:44   ` Clément Pit-Claudel
2020-04-26 18:27     ` Clément Pit-Claudel
2020-05-09  7:43       ` Eli Zaretskii

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