Add --target option to font-reduce.py.

This allows you to remap charachter from anywhere in the input font to
their proper Unicode position in the output font.

diff --git a/posts/font-reduce/font-reduce.py b/posts/font-reduce/font-reduce.py
index a58befa58032672869590bd0907415b0f281aa66..26bad5985b86b5d54d4b5a3b1da6c75eb86d6304 100755 (executable)
--- a/posts/font-reduce/font-reduce.py
+++ b/posts/font-reduce/font-reduce.py
@@ -30,16 +30,17 @@ import fontforge as _fontforge
 __version__ = '0.1'
 
 
-def convert(input_file, output_file=None, ranges=[(0x20,0x7e)], **kwargs):
+def convert(input_file, output_file=None, ranges=[(0x20,0x7e)],
+            targets=[(0x20,0x7e)], **kwargs):
     if output_file is None:
         base,ext = _os_path.splitext(input_file)
         output_file = '{}-reduced.woff'.format(base)
     i = _fontforge.open(input_file)
     o = _fontforge.font()
-    for start,stop in ranges:
-        i.selection.select(("ranges",), start, stop)
+    for ((istart,istop),(ostart,ostop)) in zip(ranges, targets):
+        i.selection.select(('ranges',), istart, istop)
         i.copy()
-        o.selection.select(("ranges",), start, stop)
+        o.selection.select(('ranges',), ostart, ostop)
         o.paste()
     for attr in ['comment', 'copyright', 'encoding', 'familyname',
                  'fontname', 'fullname', 'sfntRevision', 'sfnt_names',
@@ -113,6 +114,10 @@ if __name__ == '__main__':
         '-s', '--source', help='override font source URL')
     parser.add_argument(
         '-r', '--range', action='append', default=['0x20,0x7e'],
+        help=('add an additional range of indices to copy from the original '
+              "font (e.g '0x7f,0xff')"))
+    parser.add_argument(
+        '-t', '--target', action='append', default=['0x20,0x7e'],
         help=('add an additional range of indices to copy to the reduced font '
               "(e.g '0x7f,0xff')"))
     parser.add_argument(
@@ -126,7 +131,11 @@ if __name__ == '__main__':
     for r in args.range:
         start,stop = [int(x, 0) for x in r.split(',')]
         ranges.append((start,stop))
+    targets = []
+    for r in args.target:
+        start,stop = [int(x, 0) for x in r.split(',')]
+        targets.append((start,stop))
     
     for font in args.font:
-        convert(font, output_file=args.output, ranges=ranges,
+        convert(font, output_file=args.output, ranges=ranges, targets=targets,
                 license=args.license, source=args.source)