PATCH: compinstall

[Peter Stephenson <pws@pwstephenson.fsnet.co.uk>]

I've added some exciting and innovative features to compinstall.  Well, all
right, I've added three things that were asked for by Andrej, but it's nice
to pretend.

- You can specify a list of completers with _oldlist.  I picked five
  completers it looked sensible to offer.  Patch compinstall if you want
  more.
- You can ask for partial-word terminators to be matchable in partial-word
  matching
- If you don't have a setting for list-prompt, you get offered the default
  prompt for editing and have to delete the line explicitly to turn it off:
  this corresponds to its actual behaviour.

I haven't tried to make it turn off styles you've just removed.  You have
to start up a new shell to do that.

Index: Completion/Core/compinstall
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Core/compinstall,v
retrieving revision 1.7
diff -u -r1.7 compinstall
--- Completion/Core/compinstall	2000/04/18 13:41:14	1.7
+++ Completion/Core/compinstall	2000/04/27 20:34:21
@@ -324,7 +324,7 @@
 
 __ci_do_minor_completer_options() {
   # Set the options for the minor completers.
-  local key cond word olist omenu moriginal aspace
+  local key cond word olist omenu moriginal aspace tmparr
   __ci_get_this_style condition cond
   [[ -n $cond ]] && cond=${(Q)cond}
   __ci_get_this_style word word
@@ -369,7 +369,7 @@
 _list will usually compare the contents of the entire line with its previous
 contents to decided if it has been changed since the last keypress.  You
 can instead perform this comparison on just the current word, ignoring
-the rest of the command line.  Do you want to do this? (y/n) [n] ? "
+the rest of the command line.  Do you want to do this? (y/n) [n] "
 	    word=
             read -q key && word=true
 	    print
@@ -379,11 +379,16 @@
 way, e.g. with ^D, even if the list was generated by some special completion
 command.  The default behaviour of _oldlist is to show this list if it was
 not already visible, otherwise to generate the standard completion listing,
-but you can force it always to be shown, or make it never shown.  Choose:
+but you can force it always to be shown, or make it never shown.
+Alternatively, you can specify a list of completers for which _oldlist will
+be used.  Choose:
 
 d.    Default behaviour.
 a.    Always show old list.
-n.    Never show old list."
+n.    Never show old list.
+s.    Specify a list of completers.
+"
+
             while true; do
 	      read -k key'?--- Hit selection --- '
 	      print
@@ -393,8 +398,41 @@
 		[aA]) olist=always
 		      ;;
 		[nN]) olist=never
+		      ;;
+		[sS]) olist=
+		      tmparr=(_complete _approximate _correct _match _expand)
+		      while true; do 
+			clear
+			print "\
+     *** compinstall:  choosing completers to have _oldlist behaviour ***
+
+Type any of:
+
+1.  _complete
+2.  _approximate
+3.  _correct
+4.  _match
+5.  _expand
+
+or 0 to end, or - to delete the last choice."
+			if [[ -n $olist ]]; then
+			  print "\
+Current choices:
+  $olist"
+			fi
+			read -k key'?--- Hit selection --- '
+			print
+			case $key in
+			  0) break
+			     ;;
+			  -) olist=(${olist[1,-2]})
+			     ;;
+			  [1-5]) olist=($olist $tmparr[$key])
+			         ;;
+			esac
+                      done
 		      ;;
-		*) print "Type one of d, a or n."
+		*) print "Type one of d, a, n or s."
 		   continue
 		   ;;
 	      esac
@@ -798,6 +836,7 @@
   # More specific use of matchers is usually covered by completion functions.
 
   local mlist m_ci m_pw m_sub c_list C_list p_list s_list pw_seps key key2 elt
+  local pw_dstar
   integer eltcnt lastnz
 
   __ci_get_this_style matcher-list mlist
@@ -814,6 +853,7 @@
   # $pws_seps gives the separators used for partial-word completion
   # by element of the matcher list; these can be edited separately.
   pw_seps=('._-' '._-' '._-' '._-')
+  pw_dstar=('' '' '' '')
 
   # See what's in the matcher initially.  If these have been edited,
   # we're in trouble, but that's pretty much true of everything.
@@ -822,9 +862,10 @@
     [[ $mlist[$eltcnt] = *"m:{a-zA-Z}={A-Za-z}"* ]] && C_list[$eltcnt]=$eltcnt
     # For partial word stuff, we use backreferences to find out what
     # the set of separators was.
-    if [[ $mlist[$eltcnt] = (#b)*"r:|["([^\]]#)"]=* r:|=*"* ]]; then
+    if [[ $mlist[$eltcnt] = (#b)*"r:|["([^\]]#)"]=*"#" r:|=*"* ]]; then
       p_list[$eltcnt]=$eltcnt
       pw_seps[$eltcnt]=${match[1]}
+      [[ $mlist[$eltcnt] = *"=**"* ]] && pw_dstar[$eltcnt]='*'
     fi
     # Just look for the left matcher for substring, since the right matcher
     # might have been handled as part of a partial-word spec.
@@ -892,6 +933,13 @@
 	      if [[ $pw_seps[$key2] = *']'* ]]; then
 		pw_seps[$key2]="]${pw_seps[$key2]//\\\]}"
 	      fi
+	      print -n "
+You can allow the partial-word terminators to be matched in the pattern,
+too:  then  for example \`c.u' would expand to \`comp.source.unix', whereas
+usually you would need to type an extra intervening dot.  Do you wish the
+terminators to be matched in this way? (y/n) [n] "
+              pw_dstar[$key2]=
+	      read -q key && pw_dstar[$key2]='*'
 	    fi
 	    ;;
       [sS]) __ci_toggle_matcher s_list $key2
@@ -914,7 +962,8 @@
     [[ $c_list[$eltcnt] != ' ' ]] && elt="${elt:+$elt }m:{a-z}={A-Z}"
     [[ $C_list[$eltcnt] != ' ' ]] && elt="${elt:+$elt }m:{a-zA-Z}={A-Za-z}"
     [[ $p_list[$eltcnt] != ' ' ]] &&
-      elt="${elt:+$elt }r:|[${pw_seps[$eltcnt]}]=* r:|=*"
+      elt="${elt:+$elt }r:|[${pw_seps[$eltcnt]}]=*${pw_dstar[$eltcnt]}\
+ r:|=*${pw_dstar[$eltcnt]}"
     if [[ $s_list[$eltcnt] != ' ' ]]; then
       if [[ $elt = *"r:|=*"* ]]; then
 	elt="${elt:+$elt }l:|=*"
@@ -943,13 +992,14 @@
 }
 
 __ci_do_list_format() {
-  local key format groupn verbose listp autod
+  local key format groupn verbose listp autod haslistp
   __ci_get_this_style format format
   [[ -n $format ]] && format=${(Q)format}
   __ci_get_this_style group-name groupn
   __ci_get_this_style verbose verbose
   __ci_get_this_style list-prompt listp
-  [[ -n $listp ]] && listp=${(Q)listp}
+  [[ -n $listp ]] && haslistp=1
+  listp=${(Q)listp}
   __ci_get_this_style auto-description autod
   [[ -n $autod ]] && autod=${(Q)autod}
 
@@ -1040,17 +1090,23 @@
           esac
 	 ;;
       4) print "\
-Normally, the display of completions which don't fit on the screen is
+You can make completion lists scroll when they don't fit on the screen.
+To do this, edit a prompt to show when scrolling is active; an empty string
+turns this feature off.  It can contain \`%l' to show the number of matches
+as \`current_number/total_number', \`%p' to show the fraction of the way
+down the list, or font-control sequences such as %B, %U, %S and the
+corresponding %b, %u, %s; quotes will be added automatically.  Note that
+this is the default behaviour; delete the whole line to turn it off, in
+which case the display of completions which don't fit on the screen is
 controlled by the LISTMAX parameter (currently ${LISTMAX:-unset}), which
-specifies the maximum number to show without asking.  Instead, you can make
-completion lists scroll when they don't fit on the screen.  To do this,
-edit a prompt to show when scrolling is active; an empty string turns
-this feature off.  It can contain \`%l' to show the number of matches
-as \`current_number/total_number', as well as font-control sequences such
-as %B, %U, %S.  Quotes will be added automatically.  Hit return to keep the
-current value.
+specifies the maximum number to show without asking.  Hit return to keep
+the current value.
 "
+         [[ -z $haslistp ]] &&
+	   listp='%SAt %p: Hit TAB for more, or the character to insert%s'
 	 vared -eh -p 'prompt> ' -c listp
+	 # Unconditionally use listp; will become '' if empty.
+	 haslistp=1
 	 ;;
       5) print "\
 Many commands have options which take a single argument.  In some cases,
@@ -1080,7 +1136,7 @@
   __ci_set_this_style format format
   __ci_set_this_style group-name groupn
   __ci_set_this_style verbose verbose
-  [[ -n $listp ]] && listp=${(qq)listp}
+  [[ -n $haslistp ]] && listp=${(qq)listp}
   __ci_set_this_style list-prompt listp
   [[ -n $autod ]] && autod=${(qq)autod}
   __ci_set_this_style auto-description autod

-- 
Peter Stephenson <pws@pwstephenson.fsnet.co.uk>
Work: pws@CambridgeSiliconRadio.com
Web: http://www.pwstephenson.fsnet.co.uk