From: storm@cua.dk (Kim F. Storm)
Subject: set-window-vscroll causes infinite loop in redisplay
Date: 24 Feb 2003 02:31:54 +0100 [thread overview]
Message-ID: <5xheauqx9x.fsf@kfs2.cua.dk> (raw)
This is with CVS head on GNU/Linux under X.
1) start emacs
emacs -q
2) get rid of splash screen
RET
3) In scratch buffer, enter:
(set-window-vscroll nil 0.5) C-j
4) (try to) move cursor to the first (partially visible) line.
C-p C-p C-p C-p C-p C-p C-p C-p
5) emacs loops.
The following patch fixes this. I'll install it tomorrow unless
someone finds a better fix.
Index: xdisp.c
===================================================================
RCS file: /cvsroot/emacs/emacs/src/xdisp.c,v
retrieving revision 1.806
diff -c -r1.806 xdisp.c
*** xdisp.c 18 Feb 2003 00:17:17 -0000 1.806
--- xdisp.c 24 Feb 2003 00:31:05 -0000
***************
*** 10821,10826 ****
--- 10821,10834 ----
if (!make_cursor_line_fully_visible (w))
{
+ /* If vscroll is non-zero, and the cursor is on the top line,
+ disable vscroll, and retry. */
+ if (w->vscroll < 0 && w->cursor.y < 0)
+ {
+ w->vscroll = 0;
+ clear_glyph_matrix (w->desired_matrix);
+ }
+
/* If centering point failed to make the whole line visible,
put point at the top instead. That has to make the whole line
visible, if it can be done. */
next reply other threads:[~2003-02-24 1:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-24 1:31 Kim F. Storm [this message]
2003-02-24 15:47 ` set-window-vscroll causes infinite loop in redisplay Kim F. Storm
2003-02-25 13:34 ` Kim F. Storm
[not found] ` <87u1et7mf2.fsf@computer.localdomain>
2003-02-26 0:20 ` Kim F. Storm
2003-02-26 9:47 ` Richard Stallman
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