mouse-sel

[munro1 Dave Munro 25428]

Symptoms:

Between emacs 21.2 and 21.3, mouse-sel.el changed, introducing a
problem with interprogram-cut-function and interprogram-paste-function:

As a new feature, when mouse-sel mode is turned off, the key
bindings and interprogram-*-function's get reset to their values
before mouse-sel mode was turned on.

However, if mouse-sel mode is called to turn the mode off before
it was ever turned on (this was done pre-emptively in a part of
some lisp code I wrote), the 21.3 mouse-sel.el has never stored
the true "original" values of the interprogram-*-function's in the
mouse-sel-original-interprogram-*-function variables.  Hence,
after such a first call to mouse-sel-mode, both of the
interprogram-*-function have been reset to nil.  This undoes the
correct initialization performed in term/x-win.el at startup time.

Probably the best fix is for the mouse-sel-mode function to
recognize that it has never set mouse-sel-original-interprogram-*-function
and to never attempt to restore them until it has saved them.

If you start "emacs -q" in the X Window environment, you can cut and
paste between the emacs window and an xterm window (for example) by
default (because xterm/x-win.el set interprogram-*-function properly).
If you type "C-u 0 M-x mouse-sel-mode RET" the emacs window will no
longer cut or paste with the xterm window, despite the fact that the
"original" state of interprogram-*-function was to do the pasting.


In GNU Emacs 21.3.50.1 (powerpc-apple-darwin7.0.0, X toolkit)
 of 2003-11-03 on elko.llnl.gov
configured using `configure '--with-x' '--without-carbon''

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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  auto-compression-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  unify-8859-on-encoding-mode: t
  line-number-mode: t

Recent input:
M-x r e p o r t - SPC SPC <return>

Recent messages:
Loading mwheel...done
(emacs)
Loading tool-bar...done
Loading image...done
Loading tooltip...done
Loading /usr/gapps/axdot/yorick...done
Loading delsel...done
Loading emacsbug...done