compose-parse: Add a negative lookaside

Make this script parse gtk-compose-remove.txt for
sequences to remove from the xorg Compose file.
This will be used for removing some deadkey combinations
that we can handle better in code.

Also, make this script explicitly python2. I tried
porting it to python3, but gave up in the end.

diff --git a/gtk/compose-parse.py b/gtk/compose-parse.py
index 767f2b421ee68ae0426197e152eb0a64c57dac00..23444bc1edde5dac2690d97f74c960a4b8619d23 100755 (executable)
--- a/gtk/compose-parse.py
+++ b/gtk/compose-parse.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 # -*- coding: utf-8 -*-
 #
 # compose-parse.py, version 1.4
@@ -26,6 +26,7 @@ URL_KEYSYMSTXT = "http://www.cl.cam.ac.uk/~mgk25/ucs/keysyms.txt"
 URL_GDKKEYSYMSH = "http://git.gnome.org/browse/gtk%2B/plain/gdk/gdkkeysyms.h"
 URL_UNICODEDATATXT = 'http://www.unicode.org/Public/6.0.0/ucd/UnicodeData.txt'
 FILENAME_COMPOSE_SUPPLEMENTARY = 'gtk-compose-lookaside.txt'
+FILENAME_COMPOSE_NEGATIVE_SUPPLEMENTARY = 'gtk-compose-remove.txt'
 
 # We currently support keysyms of size 2; once upstream xorg gets sorted, 
 # we might produce some tables with size 2 and some with size 4.
@@ -448,6 +449,18 @@ xorg_compose_sequences_raw = []
 for seq in composefile.readlines():
         xorg_compose_sequences_raw.append(seq)
 
+try:
+        composefile_lookaside = open(FILENAME_COMPOSE_NEGATIVE_SUPPLEMENTARY, 'r')
+        for seq in composefile_lookaside.readlines():
+                xorg_compose_sequences_raw.remove(seq)
+except IOError, (errno, strerror):
+        if opt_verbose:
+                print "I/O error(%s): %s" % (errno, strerror)
+                print "Did not find negative lookaside compose file. Continuing..."
+except:
+        print "Unexpected error: ", sys.exc_info()[0]
+        sys.exit(-1)
+
 try:
         composefile_lookaside = open(FILENAME_COMPOSE_SUPPLEMENTARY, 'r')
         for seq in composefile_lookaside.readlines():