Re: Bug#527301: _xmms2 jump/_values: suboptimal presentation/sorting

[Clint Adams <schizo@debian.org>]

On Wed, May 06, 2009 at 06:22:16PM +0200, martin f krafft wrote:
> `xmms2 jump` completion uses
> 
>   _values -s ' ' 'playlist items' ${(On)playlistitems}
> 
> where $playlistitems is an array with items e.g.
> 
>   1[foo]
>   2[bar]
>   ...
>   12[baz]
>   13[foo]
> 
> Unfortunately, it seems as if _values does something weird:
> Even though ${(On)...} yields a reverse-numerically sorted list of
> those items, the output seems not numerically sorted.
> 
> In addition, the way _values merges keys with the same value (1 and
> 13 in the above) is suboptimal for the use case.
> 
> This list:
> 
>   [0/193] Deep Purple - Highway Star (06:43)
>   [1/194] Deep Purple - Child in Time (12:17)
>   [2/195] Deep Purple - Smoke on the Water (07:36)
>   [3/196] Deep Purple - The Mule (09:28)
>   [4/197] Deep Purple - Strange Kind of Woman (09:52)
>   [5/198] Deep Purple - Lazy (10:27)
>   [6/199] Deep Purple - Space Truckin' (19:54)
>   [7/200] Deep Purple - Black Night (06:18)
>   [8/201] Deep Purple - Speed King (07:24)
>   [9/202] Deep Purple - Lucille (08:03)
>   [10/203] Deep Purple - Highway Star (06:41)
>   [11/204] Deep Purple - Black Night (05:48)
>   [12/205] Deep Purple - A Twist in the Tail (04:23)
>   [13/206] Deep Purple - Perfect Strangers (06:52)
>   [14/207] Deep Purple - Anyone's Daugher (03:52)
>   [15/208] Deep Purple - Child in Time (10:42)
>   [16/209] Deep Purple - Anya (12:08)
>   [17/210] Deep Purple - Speed King (07:33)
>   [18/211] Deep Purple - Smoke on the Water (10:09)
> 
> Yields this completion output:
> 
>   playlist items
>   10     -- Deep Purple - Highway Star
>   11  7  -- Deep Purple - Black Night
>   12     -- Deep Purple - A Twist in the Tail
>   13     -- Deep Purple - Perfect Strangers
>   14     -- Deep Purple - Anyone's Daugher
>   15  1  -- Deep Purple - Child in Time
>   16     -- Deep Purple - Anya
>   17  8  -- Deep Purple - Speed King
>   18  2  -- Deep Purple - Smoke on the Water
>   3      -- Deep Purple - The Mule
>   4      -- Deep Purple - Strange Kind of Woman
>   5      -- Deep Purple - Lazy
>   6      -- Deep Purple - Space Truckin'
>   9      -- Deep Purple - Lucille
> 
> I am sure you'll agree that that's not really useful. It would be
> better to have proper numeric sorting and disable the merging.

You can try this for yourself:

zstyle :completion::complete:xmms2:\*:values list-grouped false
zstyle :completion::complete:xmms2:\*:values sort false       

I have no opinion on how the default behavior should be handled.
Also, setting IFS to "oldIFS" doesn't seem useful, so here's some cleanup.

Index: Completion/Unix/Command/_xmms2
===================================================================
RCS file: /cvsroot/zsh/zsh/Completion/Unix/Command/_xmms2,v
retrieving revision 1.2
diff -u -r1.2 _xmms2
--- Completion/Unix/Command/_xmms2	5 May 2009 08:47:55 -0000	1.2
+++ Completion/Unix/Command/_xmms2	6 May 2009 17:22:18 -0000
@@ -55,14 +55,11 @@
 }
 
  _xmms2_jump() {
-     oldIFS=$IFS
-     IFS=$'\n'
-     songlist=($(xmms2 list))
-     IFS=oldIFS
-     playlistitems=""
+     songlist=(${"$(xmms2 list)"})
+     playlistitems=()
      for song ($songlist); do 
 	 if [[ $song = (#b)'  '\[(<->)/(<->)\]' '(*)' '\((*)\) ]]; then
-		    playlistitems=($playlistitems "$match[1][$match[3]]")
+		    playlistitems+=("$match[1][$match[3]]")
 	 fi
      done