Basic language string mechanism

Added a set of English strings. Lang can load a language.
LabelWidget can replace IDs in the label.

IssueID #192

1 files changed, 55 insertions, 0 deletions

diff --git a/po/compile.py b/po/compile.py
new file mode 100755
index 00000000..6e565733
--- /dev/null
+++ b/po/compile.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+# Parses all the .po files and generates binary language strings to be loaded 
+# at runtime via embedded data.
+
+import os
+
+ESCAPES = {
+    '\\': '\\',
+    '"': '"',
+    'n': '\n',
+    'r': '\r',
+    't': '\t'
+}
+
+
+def unquote(string):
+    txt = string.strip()
+    if txt[0] != '"' or txt[-1] != '"':
+        raise Exception("invalid quoted string: " + string)
+    txt = txt[1:-1]
+    out = ''
+    is_escape = False
+    for c in txt:
+        if is_escape:
+            out += ESCAPES[c]
+            is_escape = False
+            continue
+        if c == '\\':
+            is_escape = True
+        else:
+            out += c
+    return out        
+        
+        
+messages = []
+for src in os.listdir('.'):
+    if not src.endswith('.po'):
+        continue
+    msg_id, msg_str = None, None
+    for line in open(src, 'rt', encoding='utf-8').readlines():
+        line = line.strip()
+        if line.startswith('msgid'):
+            msg_id = unquote(line[6:])
+        elif line.startswith('msgstr'):
+            msg_str = unquote(line[7:])        
+            messages.append((msg_id, msg_str))
+    # Make a binary blob with strings sorted by ID.
+    compiled = bytes()
+    for msg in sorted(messages):
+        compiled += msg[0].encode('utf-8') + bytes([0])
+        compiled += msg[1].encode('utf-8') + bytes([0])
+    #print(compiled)
+    open(f'../res/lang/{src[:-3]}.bin', 'wb').write(compiled)
+    
+