Support subregion flags when building the emoji font.

- update Makefile to include approved GB subregion flags by default
- update flag_glyph_name to generate sequence names for these
- fix bug where the glyphorder table wasn't getting updated with
  components, which was causing ttx to fail when compiling the
  ttx to ttf in a later phase.

Makefile

@@ -70,7 +70,9 @@ SELECTED_FLAGS = AC AD AE AF AG AI AL AM AO AQ AR AS AT AU AW AX AZ \
 	VA VC VE VG VI VN VU \
 	WS \
 	YE \
-	ZA ZM ZW
+	ZA ZM ZW \
+        GB-ENG GB-SCT GB-WLS
+
 ALL_FLAGS = $(basename $(notdir $(wildcard $(FLAGS_SRC_DIR)/*.png)))
 
 FLAGS = $(SELECTED_FLAGS)

flag_glyph_name.py

@@ -18,18 +18,38 @@
 
 __author__ = 'roozbeh@google.com (Roozbeh Pournader)'
 
+import re
 import sys
 
 import add_emoji_gsub
 
-def two_letter_code_to_glyph_name(iso_code):
+def two_letter_code_to_glyph_name(region_code):
     return 'u%04x_%04x' % (
-        add_emoji_gsub.reg_indicator(iso_code[0]),
-        add_emoji_gsub.reg_indicator(iso_code[1]))
+        add_emoji_gsub.reg_indicator(region_code[0]),
+        add_emoji_gsub.reg_indicator(region_code[1]))
+
+
+subcode_re = re.compile(r'[0-9a-z]{2}-[0-9a-z]+$')
+def hyphenated_code_to_glyph_name(sub_code):
+  # Hyphenated codes use tag sequences, not regional indicator symbol pairs.
+  sub_code = sub_code.lower()
+  if not subcode_re.match(sub_code):
+    raise Exception('%s is not a valid flag subcode' % sub_code)
+  cps = ['u1f3f3']
+  cps.extend('e00%02x' % ord(cp) for cp in sub_code if cp != '-')
+  cps.append('e007f')
+  return '_'.join(cps)
+
+
+def flag_code_to_glyph_name(flag_code):
+  if '-' in flag_code:
+    return hyphenated_code_to_glyph_name(flag_code)
+  return two_letter_code_to_glyph_name(flag_code)
+
 
 def main():
     print ' '.join([
-        two_letter_code_to_glyph_name(iso_code) for iso_code in sys.argv[1:]])
+        flag_code_to_glyph_name(flag_code) for flag_code in sys.argv[1:]])
 
 if __name__ == '__main__':
     main()

third_party/color_emoji/add_glyphs.py

@@ -195,6 +195,7 @@ for (u, filename) in img_pairs:
                 cp = ord(char)
 		if cp not in c and not is_vs(cp):
 			name = glyph_name (char)
+                        g.append(name)
 			c[cp] = name
 			if len (u) > 1:
 				h[name] = [0, 0]