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bug#18510: 24.4.50; ERC doesn't update mode line frequently enough


From: Stefan Monnier
Subject: bug#18510: 24.4.50; ERC doesn't update mode line frequently enough
Date: Wed, 24 Sep 2014 09:20:13 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4.50 (gnu/linux)

Ping?


        Stefan


>>>>> "Stefan" == Stefan Monnier <address@hidden> writes:

>>> I've worked around it locally by advising erc-update-mode-line to call
>>> (force-mode-line-update t).
>> That's not a workaround, that's a fix.

> Hmm... not sure what that was about, sorry.  Of course, the
> (force-mode-line-update t) should only be called when changing
> a variable that's visible in the global mode-line-format.

> Does the patch below work?
> [ I assume the problem is also present in 24.3.93.  ]


>         Stefan


> === modified file 'lisp/erc/erc-track.el'
> --- lisp/erc/erc-track.el     2014-02-10 01:34:22 +0000
> +++ lisp/erc/erc-track.el     2014-09-19 18:34:57 +0000
> @@ -767,8 +765,7 @@
>                 (erc-modified-channels-remove-buffer buffer))))
>           erc-modified-channels-alist)
>        (when removed-channel
> -     (erc-modified-channels-display)
> -     (force-mode-line-update t)))
> +     (erc-modified-channels-display)))
>      (remove-hook 'post-command-hook 'erc-modified-channels-update)))
 
>  (defvar erc-track-mouse-face (if (featurep 'xemacs)
> @@ -825,9 +822,10 @@
>       ((eq 'importance erc-track-switch-direction)
>        (erc-track-sort-by-importance)))
>    (run-hooks 'erc-track-list-changed-hook)
> -  (unless (eq erc-track-position-in-mode-line nil)
> -  (if (null erc-modified-channels-alist)
> -      (setq erc-modified-channels-object (erc-modified-channels-object nil))
> +  (when erc-track-position-in-mode-line
> +    (let* ((oldobject erc-modified-channels-object)
> +        (strings
> +         (when erc-modified-channels-alist
>      ;; erc-modified-channels-alist contains all the data we need.  To
>      ;; better understand what is going on, we split things up into
>      ;; four lists: BUFFERS, COUNTS, SHORT-NAMES, and FACES.  These
> @@ -858,10 +856,11 @@
>             buffers (cdr buffers)
>             counts (cdr counts)
>             faces (cdr faces)))
> -      (when (featurep 'xemacs)
> -     (erc-modified-channels-object nil))
> -      (setq erc-modified-channels-object
> -         (erc-modified-channels-object strings))))))
> +             strings)))
> +        (newobject (erc-modified-channels-object strings)))
> +      (unless (equal oldobject newobject)
> +     (setq erc-modified-channels-object newobject)
> +     (force-mode-line-update t)))))
 
>  (defun erc-modified-channels-remove-buffer (buffer)
>    "Remove BUFFER from `erc-modified-channels-alist'."





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