A tweak to magic-space

A tweak to magic-space

[Bart Schaefer]

I believe I mentioned this in a previous posting ...

I've been using this function:

  magic-space() {
    [[ "$LBUFFER" = (|*[^\\])!\"* ]] && zle .self-insert || zle .magic-space
  }
  zle -N magic-space

This means that if the current input line contains !" to the left of the
insertion point, history is not expanded upon typing a space.

This is all very well and good, but it makes using `set -x' an incredible
pain, because the trace of the above function keeps popping out in place of
every space I type.  (Maybe we need an inverse of `typeset -ft' ... though,
oddly, execution tracing set only with `typeset -ft' does NOT happen when
widgets are called directly by ZLE, which is probably a bug.)

The following patch puts the equivalent of the above into the C code.  I
won't commit it until after 4.0.1 is released, unless enough somebodies
say I should.  However, if any of you try it, I could use some feedback
on whether it's better to test for !" only in LBUFFER, or whether to test
all of $BUFFER (that is, drop the `bangq + 2 > line + cs' test in the C
version).  I go back and forth ...

--- zsh-forge/current/Src/Zle/zle_tricky.c	Thu May 17 08:48:46 2001
+++ zsh-4.0/Src/Zle/zle_tricky.c	Thu May 24 01:15:32 2001
@@ -2239,9 +2239,13 @@
 int
 magicspace(char **args)
 {
+    char *bangq;
     int ret;
     c = ' ';
-    if (!(ret = selfinsert(args)))
+    for (bangq = (char *)line; (bangq = strchr(bangq, bangchar)); bangq += 2)
+	if (bangq[1] == '"' && (bangq == (char *)line || bangq[-1] != '\\'))
+	    break;
+    if (!(ret = selfinsert(args)) && (!bangq || bangq + 2 > (char *)line + cs))
 	doexpandhist();
     return ret;
 }

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net