Re: Completion function for _screen

[Felix Rosencrantz <f_rosencrantz@xxxxxxxxx>]

Here's a bit of clean up.  Most of it based on feedback from Oliver, including
the style and screendir command to remove dependencies on sed&awk.  Also, I've
made some improvements in arg handling for some flags.
-FR

ps it would nice if there was some sort of translation chart of sed/awk/perl
transformations into zsh parameter expressions...  i tend to find reading
exisiting expressions very difficult.  they contain lot's of grouping& special
syntax characters and no commenting...  the worst of lisp and regexs rolled
into one...
--- Felix Rosencrantz <f_rosencrantz@xxxxxxxxx> wrote:
> A version of this has been shipping with screen for a while now.  Just adding
> it to the zsh distribution.

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Index: Completion/Unix/Command/_screen
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_screen,v
retrieving revision 1.1
diff -u -r1.1 _screen
--- Completion/Unix/Command/_screen	19 Apr 2003 17:23:47 -0000	1.1
+++ Completion/Unix/Command/_screen	22 Apr 2003 15:16:51 -0000
@@ -1,8 +1,9 @@
 #compdef screen 
 #Generated by Felix Rosencrantz
 
- local context state line scr_cmds
- scr_cmds=(
+local context state line scr_cmds
+typeset -A opt_args
+scr_cmds=(
   acladd	aclchg		acldel		aclgrp		aclumask
   activity	addacl		allpartial	at		attrcolor
   autodetach	autonuke	backtick	bce		bell_msg
@@ -37,47 +38,44 @@
   verbose	version		wall		width		windowlist
   windows	wrap		writebuf	writelock	xoff
   xon		zombie
- )
+)
   
-  typeset -A opt_args
-  _arguments \
-	"-a[Force all capabilities into each window's termcap.]" \
-	'-A:Adapt all windows to the new display width & height.' \
-	"-c:Read configuration file instead of '.screenrc'.:_files -/" \
-	'-d:Detach the elsewhere running screen (with -r: reattach here).:->sessionname' \
-	'-dmS:Start as daemon: Screen session in detached mode.' \
-	'-D:Detach and logout remote (with -r: reattach here).' \
-	'-e:Change command characters.' \
-	'-f-:Flow control on, -fn = off, -fa = auto.:((n\:Flow\ conrol\ off a\:Flow\ conrol\ auto))' \
-	'-h:Set the size of the scrollback history buffer.' \
-	'-i[Interrupt output sooner when flow control is on.]' \
-	'-l[Login mode on (update /var/run/utmp), -ln = off.]' \
-	'-list[Do nothing, just list our SockDir.]' \
-	'-ls[Do nothing, just list our SockDir.]' \
-	"-L[Terminal's last character can be safely updated.]" \
-	'-m[ignore $STY variable, do create a new screen session.]' \
-	'-O[Choose optimal output rather than exact vt100 emulation.]' \
-	'-p:Preselect the named window if it exists.' \
-	'-q[Quiet startup. Exits with non-zero return code if unsuccessful.]' \
-	'-r[Reattach to a detached screen process.]:Handling Tag sessionname:->sessionname' \
-	'-R[Reattach if possible, otherwise start a new session.]' \
-	'-s:Shell to execute rather than $SHELL.' \
-	'-S:Name this session <pid>.sockname instead of <pid>.<tty>.<host>.' \
-	"-t:Set title. (window's name)." \
-	'-T:Use term as $TERM for windows, rather than "screen".' \
-	'-U[Tell screen to use UTF-8 encoding.]' \
-	'-v[Print screen version.]' \
-	'-wipe[Do nothing, just clean up SockDir.]' \
-	'-x[Attach to a not detached screen. (Multi display mode).]' \
-	'-X[Execute <cmd> as a screen command in the specified session.]:screencmd:(${scr_cmds[@]})'
+_arguments \
+  "-a[force all capabilities into each window's termcap]" \
+  '-A[adapt all windows to the new display width & height]' \
+  "-c[read configuration file instead of '.screenrc']:config file:_files -/" \
+  '-d[detach the elsewhere running screen (with -r: reattach here)]:session name:->sessionname' \
+  '-dmS[start as daemon, screen session in detached mode]' \
+  '-D[detach and logout remote (with -r: reattach here)]' \
+  '-e[change command characters]:command characters:' \
+  '-f-[set flow control]:flow control:((n\:flow\ control\ off a\:Flow\ control\ auto \:Flow\ control\ on))' \
+  '-h[set the size of the scrollback history buffer]:buffer size:' \
+  '-i[interrupt output sooner when flow control is on]' \
+  '(-l)-ln[login mode off (do not update /var/run/utmp)]' \
+  '(-ln)-l[login mode on (update /var/run/utmp)]' \
+  '(-)'{-ls,-list}'[list sessions/socket directory]' \
+  "-L[terminal's last character can be safely updated]" \
+  '-m[ignore $STY variable, do create a new screen session]' \
+  '-O[choose optimal output rather than exact vt100 emulation]' \
+  '-p[preselect the named window]:window number or name:(( \=\:windowlist -\:blank\ window \:window\ number))' \
+  '-q[quiet startup. exits with non-zero return code if unsuccessful]' \
+  '-r[reattach to a detached screen process]:session name:->sessionname' \
+  '-R[reattach if possible, otherwise start a new session]' \
+  '-s[shell to execute rather than $SHELL]:shell name: _command_names -e' \
+  '-S[name this session <pid>.sockname instead of <pid>.<tty>.<host>]:session name:' \
+  "-t[set title(window's name)]:title:" \
+  '-T[use term as $TERM for windows, rather than "screen"]:terminal type:_terminals' \
+  '-U[tell screen to use UTF-8 encoding]' \
+  '(-)-v[print screen version]' \
+  '(-)-wipe[do nothing, clean up SockDir]' \
+  '-x[attach to a not detached screen. (Multi display mode).]' \
+  '-X[Execute <cmd> as a screen command in the specified session.]:screencmd:(${scr_cmds[@]})'
 
 case $state in
-  "sessionname")
-  # Complete folder names.
+  sessionname)
+  # Complete session names
   local screendir
-
-    screendir=(`screen -ls | grep Socket | sed -n -e 's/\.$//' -e '$p' | awk '{print $NF;}'`)
-
-  _wanted files expl 'screen process' _path_files -W screendir
-;;
+  screendir=( ${${${(M)${(f)"$(_call_program screen-session $words[1] -ls)"}:#*Socket*}%.}##* } )
+  _wanted screen-session expl 'screen process' _path_files -W screendir
+  ;;
 esac