should we extend priority use in gnome-vfs.mime ?

[Christophe Fergeau <teuf users sourceforge net>]

Hi, 

I rolled up this patch for gnome-mime-data which removes the .it
extension from it, and removes a few unnecessary uppercase extensions.

But I thought a little more about the .it extension issue, and thought
that it may be more clever to fix it another way.
Currently, gnome-vfs uses the following scheme when it is asked for a
file mime-type:
* try to sniff the mime-type
* if it fails, check to see if it has an extension which had a priority
of 2 in gnome-vfs.mime
* if nothing is found, do the same with extensions of priority 1
* otherwise, check if a regexp matches the filename
* finally use the result of text mime-sniffing

This fixed scheme has 2 problems: 
* the it problem which is caused by the fact that we can't say that for
a given extension, text sniffing takes precedence over the extension
match
* gzipped files need to be handled differently since we can't specify
that for example gzipped abiword files should be detected using their
extension, not mime-sniffing.

So I was wondering if it would be a good idea to extend the current
priority stuff for extensions to add a priority 0 which would tell
gnome-vfs that for these extensions it should prefer text sniffing
result instead of the extension match result). This one would be used to
handle the .it case for example. A priority 3 could also be added to
tell gnome-vfs that it should prefer extension matching over
mime-sniffing (this can be used to remove the special-casing of gzipped
files in the current gnome-vfs code). One drawback if we go that way is
that someone will have to go through gnome-vfs.mime to change the
priority of files that can be gzipped.

Any opinion ? is it worth implementing that (that doens't look to
difficult) or is it overkill ? and how does it fit in the feature freeze
(to my eyes that is a bug fix so that's ok) ?

Christophe






? autom4te.cache
? mime.diff
? tex.diff
Index: gnome-vfs.mime
===================================================================
RCS file: /cvs/gnome/gnome-mime-data/gnome-vfs.mime,v
retrieving revision 1.49
diff -u -d -b -u -r1.49 gnome-vfs.mime
--- gnome-vfs.mime	25 Oct 2002 14:32:13 -0000	1.49
+++ gnome-vfs.mime	24 Nov 2002 14:33:33 -0000
@@ -184,7 +184,7 @@
 	ext: spd
 
 application/x-font-ttf
-	ext: ttf TTF
+	ext: ttf
 
 application/x-font-type1
 	ext: pfa pfb
@@ -365,14 +365,11 @@
 audio/x-aiff
 	ext: aif aifc aiff
 
-audio/x-it
-	ext: it IT
-
 audio/x-midi
 	ext: midi mid
 
 audio/x-mod
-	ext: mod MOD
+	ext: mod
 
 audio/x-mp3
 	ext: mp3
@@ -387,13 +384,13 @@
 	ext: rm ra ram
 
 audio/x-s3m
-	ext: S3M s3m
+	ext: s3m
 
 audio/x-scpls
 	ext: pls
 
 audio/x-stm
-	ext: STM stm
+	ext: stm
 
 audio/x-ulaw
 	ext: au
@@ -408,7 +405,7 @@
 	ext: xi
 
 audio/x-xm
-	ext: xm XM
+	ext: xm
 
 
 image/bmp
@@ -476,10 +473,10 @@
 	ext: ico
 
 image/x-iff
-	ext: iff IFF
+	ext: iff
 
 image/x-ilbm
-	ext: ilbm ILBM
+	ext: ilbm
 
 image/x-lwo
 	ext: lwo lwob
@@ -569,13 +566,13 @@
 	ext: css
 
 text/html
-	ext: html htm HTML
+	ext: html htm
 
 text/mathml
 	ext: mml
 
 text/plain
-	ext: asc txt TXT
+	ext: asc txt
 
 text/richtext
 	ext: rtx
@@ -599,7 +596,7 @@
 	ext: cc C cpp c++
 
 text/x-c-header
-	ext: h H h++ hpp
+	ext: h h++ hpp
 
 text/x-comma-separated-values
 	ext: csv