PATCH: RE: completion widgets in menu selection

[Sven Wischnowsky <wischnow@informatik.hu-berlin.de>]

Andrej Borsenkow wrote:

> ...
> 
> > The more I think about this, the more sense does it seem to make,
> > especially because this allows everything that was possible before
> > plus some.
> 
> One problem. How should undo after this second widget behave? Curretly it
> leaves the last match, selected in menu selection, inserted and forgets about
> list.

I've modified the patch to make it go back to where it was when menu
selection was started.

I'm going to commit this version of the patch.

> It would be very nice if it returned to menu selection ... but I do not
> know how difficult it is.

Very. At that time it has left the menu selection code and doesn't
have any information about the state that was in any more.

> More general. With amount of state information kept in compstate it is very
> easy to write separate bindable commands that modify generated lists.

One can currently only say what to do with that list, display-wise and 
insertion-wise.

> It would
> be very nice if undo returned to previous state in this case.

Hm, maybe, yes. The problem is that the undo-stuff isn't handled by
the completion code but by the zle main loop, so we don't really have
any control over it, other than inserting additional undo-return
points -- the opposite of what you want.

Maybe it's one of the things you can bring to our minds when (and if)
we try to improve zle and the integration of completion widgets into
zle after 4.0.

Bye
 Sven

Index: Src/Zle/compcore.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/Zle/compcore.c,v
retrieving revision 1.39
diff -u -r1.39 compcore.c
--- Src/Zle/compcore.c	2000/10/04 13:24:45	1.39
+++ Src/Zle/compcore.c	2000/10/11 10:49:38
@@ -524,14 +524,16 @@
 	    dat[1] = 0;
 	    menucmp = menuacc = 0;
 	    minfo.cur = NULL;
-	    if (ret == 2) {
+	    if (ret >= 2) {
 		fixsuffix();
 		cs = 0;
 		foredel(ll);
 		inststr(origline);
 		cs = origcs;
-		clearlist = 1;
-		invalidatelist();
+		if (ret == 2) {
+		    clearlist = 1;
+		    invalidatelist();
+		}
 	    }
 	}
     }
Index: Src/Zle/complist.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/Zle/complist.c,v
retrieving revision 1.32
diff -u -r1.32 complist.c
--- Src/Zle/complist.c	2000/07/03 08:05:28	1.32
+++ Src/Zle/complist.c	2000/10/11 10:49:38
@@ -2237,7 +2237,11 @@
 	    continue;
 	} else {
 	    ungetkeycmd();
-	    acc = 1;
+	    if (cmd->widget && (cmd->widget->flags & WIDGET_NCOMP)) {
+		acc = 0;
+		broken = 2;
+	    } else
+		acc = 1;
 	    break;
 	}
 	do_single(**p);
@@ -2260,6 +2264,7 @@
 	menucmp = 2;
 	showinglist = -2;
 	minfo.asked = 0;
+	zrefresh();
     }
     if (!noselect && (!dat || acc)) {
 	showinglist = -2;
@@ -2271,7 +2276,8 @@
     mlbeg = -1;
     fdat = NULL;
 
-    return ((dat && !broken) ? (acc ? 1 : 2) : (!noselect ^ acc));
+    return (broken == 2 ? 3 :
+	    ((dat && !broken) ? (acc ? 1 : 2) : (!noselect ^ acc)));
 }
 
 /* The widget function. */

--
Sven Wischnowsky                         wischnow@informatik.hu-berlin.de