PATCH: expansion

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

[ sunsite.auc.dk seems to be down, at least I don't get my mails
  back... I'll just keep on sending patches ;-]

We were discussing these... This adds the style `suffix' and makes
`accept-exact' be used by _expand:

- With `suffix', expansion is not done if there is anything after a
  `~foo' or `$foo'. I.e. it will not expand `~foo/<TAB>', but it will
  expand `~foo'.
- With `accept-exact' set it will expand `$MAIL', with it unset, it
  will not expand it (if there are other parameters starting with
  `MAIL').
  We were using rexexact in the old expansion code, so I thought we
  should just use `accept-exact' which is the style equivalent of
  recexact.
  Note that I've used the same default value in _expand as it has
  elsewhere (`false'), which means that without further configuring,
  this now behaves differently. Should we make it default to `true' in 
  _expand?

Ok. Is this good enough? Oliver?

Bye
 Sven

Index: Completion/Core/_expand
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Core/_expand,v
retrieving revision 1.15
diff -u -r1.15 _expand
--- Completion/Core/_expand	2000/06/08 08:39:51	1.15
+++ Completion/Core/_expand	2000/06/13 11:22:46
@@ -18,12 +18,6 @@
       force="$force$opt"
     done
 
-if [[ "$funcstack[2]" = _prefix ]]; then
-  word="$IPREFIX$PREFIX$SUFFIX"
-else
-  word="$IPREFIX$PREFIX$SUFFIX$ISUFFIX"
-fi
-
 # First, see if we should insert all *completions*.
 
 if [[ "$force" = *c* ]] ||
@@ -33,8 +27,25 @@
   [[ "$curcontext" = expand-word:* ]] && _complete && return 0
   return 1
 fi
+
+if [[ "$funcstack[2]" = _prefix ]]; then
+  word="$IPREFIX$PREFIX$SUFFIX"
+else
+  word="$IPREFIX$PREFIX$SUFFIX$ISUFFIX"
+fi
+
+zstyle -t ":completion:${curcontext}:" suffix &&
+  [[ "$word" = (\~*/*|\$[a-zA-Z0-9_]##[^a-zA-Z0-9_]*|\$\{*\}?*) ]] &&
+  return 1
+
+zstyle -t ":completion:${curcontext}:" accept-exact ||
+  { [[ "$word" = \~(|[-+]) ||
+       ( "$word" = \~[-+][1-9]## && $word[3,-1] -le $#dirstack ) ||
+       ( "$word" = \~* && ${#userdirs[(I)${word[2,-1]}*]}+${#nameddirs[(I)${word[2,-1]}*]} -ne 1 ) ||
+       ( "$word" = \$[a-zA-Z0-9_]## && 
+         ${#parameters[(I)${word[2,-1]}*]} -ne 1 ) ]] && return 1 }
 
-# In exp we will collect the expansion.
+# In exp we will collect the expansions.
 
 exp=("$word")
 
Index: Doc/Zsh/compsys.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/compsys.yo,v
retrieving revision 1.60
diff -u -r1.60 compsys.yo
--- Doc/Zsh/compsys.yo	2000/06/08 08:39:51	1.60
+++ Doc/Zsh/compsys.yo	2000/06/13 11:22:48
@@ -779,6 +779,12 @@
 matches.  If it is set to `true' for at least one match which is the
 same as the string on the line, this match will immediately be
 accepted.
+
+Note that this is also used by the tt(_expand) completer to decide if
+words beginning with a tilde or parameter expansion should be
+expanded. This means that if, for example, there are parameters
+tt(foo) and tt(foobar), the string `tt($foo)' will only be expanded if 
+tt(accept-exact) is set to `true'.
 )
 kindex(add-space, completion style)
 item(tt(add-space))(
@@ -1785,6 +1791,14 @@
 
 substitution will be performed only if given an explicit numeric
 argument other than `tt(1)', as by typing `tt(ESC 2 TAB)'.
+)
+kindex(suffix, completion style)
+item(tt(suffix))(
+This is used by the tt(_expand) completer if the word starts with a
+tilde or parameter expansion. If it is set to `true', the word will
+only be expanded if it doesn't have a suffix, i.e. if it is something
+like `tt(~foo)' or `tt($foo)', but not if it is `tt(~foo/)' or
+`tt($foo/bar)'. The default for this style is `false'.
 )
 kindex(tag-order, completion style)
 item(tt(tag-order))(

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