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Re: Possible `point-entered' `point-left' Text Property Bug
From: |
Chong Yidong |
Subject: |
Re: Possible `point-entered' `point-left' Text Property Bug |
Date: |
Fri, 12 May 2006 13:51:37 -0400 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
> I don't know why this happens
> even when moving vertically with point in the middle of a line, but I
> am not familiar with the point motion code.
>
> I am really surprised about this because line-move-1 binds
> inhibit-point-motion-hooks to t, which ought to prevent the
> point-entered/left functions from even being checked for all the
> intermediate positions.
I investigated some more, and found two separate bugs. The first bug
is that inhibit-point-motion-hooks was not being set to t during
Fline_beginning_position.
The second bug is more subtle. In simple.el line 3652, we have
;; Process intangibility within a line.
;; Move to the chosen destination position from above,
;; with intangibility processing enabled.
(goto-char (point-min))
(let ((inhibit-point-motion-hooks nil))
(goto-char new)
Here, inhibit-point-motion-hooks is bound to nil to avoid processing
the intangible property. But this also has the effect of spuriously
calling point-left and point-entered hooks if they are defined. I
hacked around this by changing it to
(goto-char new)
(let ((inhibit-point-motion-hooks nil))
(goto-char new)
I'm not 100% certain this will work or how to test it, so someone
familiar with the tangibility/point motion code should take a look.
- Re: Possible `point-entered' `point-left' Text Property Bug, Chong Yidong, 2006/05/11
- Re: Possible `point-entered' `point-left' Text Property Bug, Richard Stallman, 2006/05/12
- Re: Possible `point-entered' `point-left' Text Property Bug, Chong Yidong, 2006/05/12
- Re: Possible `point-entered' `point-left' Text Property Bug,
Chong Yidong <=
- Re: Possible `point-entered' `point-left' Text Property Bug, Richard Stallman, 2006/05/13
- Re: Possible `point-entered' `point-left' Text Property Bug, Chong Yidong, 2006/05/13
- Re: Possible `point-entered' `point-left' Text Property Bug, Richard Stallman, 2006/05/14
- Re: Possible `point-entered' `point-left' Text Property Bug, Chong Yidong, 2006/05/14
- Re: Possible `point-entered' `point-left' Text Property Bug, Richard Stallman, 2006/05/15
- Re: Possible `point-entered' `point-left' Text Property Bug, Chong Yidong, 2006/05/15