Issue #322 - Vertical text doesn't fall back to rotated versions ...

...of horizontal glyphs when necessary

Implemented UAX#50 to determine whether characters rotate or not
in vertical layout.

1 files changed, 54 insertions, 0 deletions

diff --git a/tools/gen-vertical-orientation-U-table.py b/tools/gen-vertical-orientation-U-table.py
new file mode 100755
index 00000000..4697b319
--- /dev/null
+++ b/tools/gen-vertical-orientation-U-table.py
@@ -0,0 +1,54 @@
+#!/usr/bin/python
+#coding:utf-8
+import os
+import sys
+
+if len(sys.argv) != 2:
+    print('usage;./' + os.path.basename(__file__)  + ' VerticalOrientation.txt')
+    sys.exit(1)
+
+#pick up all data from text
+data = []
+f = open(sys.argv[1], 'r')
+for line in f:
+    line = line.split("#")[0].strip()
+    if len(line) == 0:
+        continue
+
+    coderange, vo = line.split(";")
+    vo = vo.strip()
+
+    codes = coderange.split("..")
+    if len(codes) == 1:
+        st = int(codes[0], 16)
+        ed = st
+    else:
+        st = int(codes[0], 16)
+        ed = int(codes[1], 16)
+
+    data.append([st, ed, vo])
+f.close()
+
+
+#compress all data, replace Tu to U and Tr to R.
+compressed = []
+t = []
+for d in data:
+    if d[2] == 'Tu': d[2] = 'U'
+    if d[2] == 'Tr': d[2] = 'R'
+
+    if t == []:
+        t = d
+    else:
+        if t[2] == d[2] and t[1] + 1 == d[0]:
+            t[1] = d[1]
+        else:
+            compressed.append(t)
+            t = d
+compressed.append(t)
+
+
+#dump vo=U
+for d in compressed:
+    if d[2] == 'U':
+        print('{0x%04X, 0x%04X},' % tuple(d[0:2]))