26801: add completion for calendar function

add tracking of precommand modifiers that are in effect

ChangeLog

@@ -1,3 +1,12 @@
+2009-04-01  Peter Stephenson  <pws@csr.com>
+
+	* 26801: Completion/Base/Core/_main_complete,
+	Completion/Unix/Command/_calendar,
+	Completion/Zsh/Command/_command,
+	Completion/Zsh/Command/_precommand: add completion for calendar
+	function; add tracking for precommand modifiers that are
+	in effect.
+
 2009-03-26  Peter Stephenson  <pws@csr.com>
 
 	* 26797: Doc/Zsh/options.yo: further minor changes.
@@ -11499,5 +11508,5 @@
 
 *****************************************************
 * This is used by the shell to define $ZSH_PATCHLEVEL
-* $Revision: 1.4640 $
+* $Revision: 1.4641 $
 *****************************************************

Completion/Base/Core/_main_complete

@@ -32,6 +32,9 @@ local func funcs ret=1 tmp _compskip format nm call match min max i num\
       _saved_insert="${compstate[insert]}" \
       _saved_colors="$ZLS_COLORS"
 
+# _precommand sets this to indicate we are following a precommand modifier
+local -a precommands
+
 typeset -U _lastdescr _comp_ignore _comp_colors
 
 [[ -z "$curcontext" ]] && curcontext=:::

Completion/Unix/Command/_calendar

@@ -1,12 +1,34 @@
 #compdef calendar
 
-_arguments \
-  '-a[process files of all users]' \
-  '-A[print today and the following num days]:number of days:' \
-  '-b[enforce special KOI8 date calculation mode]' \
-  '-B[print today and the previous num days]:number of days:' \
-  '-f[use file as the default calendar]:calendar file:_files' \
-  '-l[print today and the following num days]:number of days:' \
-  '-w[print today and the following num days only if today is Friday]:number of days:' \
-  '-t[act as though today is the date specified]:date:'
+if [[ $+functions[calendar] -eq 1 && -z $precommands[(r)command] ]]; then
+  # The shell function is loaded, and we're not instructed to
+  # use an external command, so complete that.
+  _arguments \
+    '-a[show all calendar items]' \
+    '-b[brief, display first line only]' \
+    '-d[move events to done file]' \
+    '-D[never move events to done file]' \
+    '-r[show all remaining items from start or now]' \
+    '-s[use sched to schedule a warning]' \
+    '-v[verbose]' \
+    '-B[select number of lines to display]:lines: ' \
+    '-C[select calendar file]:calendar file:_path_files' \
+    '-n[select max number of events]:max number of events: ' \
+    '-S[select show programme]:show programme:_command_names' \
+    '1:date/time: ' \
+    '(-r)2:end date/time: '
+else
+  # This is only one particular version of calendar.
+  # Some variant of BSD, I think.
 
+  _arguments \
+    '-a[process files of all users]' \
+    '-A[print today and the following num days]:number of days:' \
+    '-b[enforce special KOI8 date calculation mode]' \
+    '-B[print today and the previous num days]:number of days:' \
+    '-f[use file as the default calendar]:calendar file:_files' \
+    '-l[print today and the following num days]:number of days:' \
+    '-w[print today and the following num days only if today is Friday]:number of days:' \
+    '-t[act as though today is the date specified]:date:'
+
+fi

Completion/Zsh/Command/_command

@@ -2,6 +2,8 @@
 
 local ret
 
+# indicate if this is a precommand modifier
+[[ $service = command ]] && precommands+=(command)
 if [[ CURRENT -ge 3 ]]; then
   compset -n 2
   _normal && ret=0

Completion/Zsh/Command/_precommand

@@ -1,5 +1,8 @@
 #compdef - nohup eval time rusage noglob nocorrect exec catchsegv aoss
 
+# precommands is made local in _main_complete
+precommands+=($words[1])
+
 shift words
 (( CURRENT-- ))