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Re: dired "!" hints baffled by multiple sources of same answer
From: |
Dan Jacobson |
Subject: |
Re: dired "!" hints baffled by multiple sources of same answer |
Date: |
Thu, 06 Mar 2003 03:04:27 +0800 |
User-agent: |
Gnus/5.090008 (Oort Gnus v0.08) Emacs/21.2 (i386-pc-linux-gnu) |
>> [the dired-x Shell Command Guessing etc. info node] says "Dired only
>> tries to guess a command for a single file, never for a
>> list of marked files." but in fact it does, if the marked files have
>> the same suffix it seems.
so say so in Info
>> But if it plans to use xloadimage on .jpg's and use xloadimage on
>> .gif's, then it should use xloadimage when presented with a list
>> that are all .jpg's and .gif's.
K> dired-x.el says:
K> ;;; * Parse `dired-guess-shell-alist-user' and
K> ;;; `dired-guess-shell-alist-default' (in that order) for the first REGEXP
K> ;;; that matches the first file in the file list.
K> ;;;
K> ;;; * If the REGEXP matches all the entries of the file list then evaluate
K> ;;; COMMAND, which is either a string or a Lisp expression returning a
K> ;;; string. COMMAND may be a list of commands.
K> What are dired-guess-shell-alist-user and dired-guess-shell-alist-default set
K> to? If they have an entry like
K> ("\\.\\(gif\\|jpg\\)\\'" . "xloadimage")
K> instead of (or in front of) 2 separate entries for GIF and JPEG files, then
it
K> should work the way you want.
Well they aren't so it doesn't:
$ grep xloadim /usr/share/emacs/21.2/lisp/dired-x.el
'("\\.e?ps$" "ghostview" "xloadimage" "lpr")
'("\\.p[bgpn]m$" "xloadimage")
'("\\.gif$" "xloadimage") ; view gif pictures
'("\\.tif$" "xloadimage")
'("\\.png$" "display") ; xloadimage 4.1 doesn't grok PNG
'("\\.jpg$" "xloadimage")
So, the dired-x fellow should either make them all into (xxx|yyy|zzz)
stings, less ideal; or more ideal, do a better matching scheme...
also allow case insensitivity, so one can also match .JPG's
etc. without having to write everything twice.