Index: grit/pseudo_rtl.py |
=================================================================== |
--- grit/pseudo_rtl.py (revision 0) |
+++ grit/pseudo_rtl.py (revision 0) |
@@ -0,0 +1,102 @@ |
+#!/usr/bin/python |
+# Copyright (c) 2011 The Chromium Authors. All rights reserved. |
+# Use of this source code is governed by a BSD-style license that can be |
+# found in the LICENSE file. |
+ |
+'''Pseudo RTL, (aka Fake Bidi) support. It simply wraps each word with |
+Unicode RTL overrides. |
+More info at https://sites.google.com/a/chromium.org/dev/Home/fake-bidi |
+''' |
+ |
+import re |
+import types |
+ |
+from grit import tclib |
+ |
+ACCENTED_STRINGS = { |
+ 'a': u"\u00e5", 'e': u"\u00e9", 'i': u"\u00ee", 'o': u"\u00f6", |
+ 'u': u"\u00fb", 'A': u"\u00c5", 'E': u"\u00c9", 'I': u"\u00ce", |
+ 'O': u"\u00d6", 'U': u"\u00db", 'c': u"\u00e7", 'd': u"\u00f0", |
+ 'n': u"\u00f1", 'p': u"\u00fe", 'y': u"\u00fd", 'C': u"\u00c7", |
+ 'D': u"\u00d0", 'N': u"\u00d1", 'P': u"\u00de", 'Y': u"\u00dd", |
+ 'f': u"\u0192", 's': u"\u0161", 'S': u"\u0160", 'z': u"\u017e", |
+ 'Z': u"\u017d", 'g': u"\u011d", 'G': u"\u011c", 'h': u"\u0125", |
+ 'H': u"\u0124", 'j': u"\u0135", 'J': u"\u0134", 'k': u"\u0137", |
+ 'K': u"\u0136", 'l': u"\u013c", 'L': u"\u013b", 't': u"\u0163", |
+ 'T': u"\u0162", 'w': u"\u0175", 'W': u"\u0174", |
+ '$': u"\u20ac", '?': u"\u00bf", 'R': u"\u00ae", r'!': u"\u00a1", |
+} |
+ |
+# a character set containing the keys in ACCENTED_STRINGS |
+# We should not accent characters in an escape sequence such as "\n". |
+# To be safe, we assume every character following a backslash is an escaped |
+# character. We also need to consider the case like "\\n", which means |
+# a blackslash and a character "n", we will accent the character "n". |
+TO_ACCENT = re.compile(r'[%s]|\\[a-z\\]' % ''.join(ACCENTED_STRINGS.keys())) |
+ |
+# Lex text so that we don't interfere with html tokens and entities. |
+# This lexing scheme will handle all well formed tags and entities, html or |
+# xhtml. It will not handle comments, CDATA sections, or the unescaping tags: |
+# script, style, xmp or listing. If any of those appear in messages, |
+# something is wrong. |
+TOKENS = [ re.compile( |
+ '^%s' % pattern, # match at the beginning of input |
+ re.I | re.S # html tokens are case-insensitive |
+ ) |
+ for pattern in |
+ ( |
+ # a run of non html special characters |
+ r'[^<&]+', |
+ # a tag |
+ (r'</?[a-z]\w*' # beginning of tag |
+ r'(?:\s+\w+(?:\s*=\s*' # attribute start |
+ r'(?:[^\s"\'>]+|"[^\"]*"|\'[^\']*\'))?' # attribute value |
+ r')*\s*/?>'), |
+ # an entity |
+ r'&(?:[a-z]\w+|#\d+|#x[\da-f]+);', |
+ # an html special character not part of a special sequence |
+ r'.' |
+ ) ] |
+ |
+ALPHABETIC_RUN = re.compile(r'([^\W0-9_]+)') |
+ |
+RLO = u'\u202e' |
+PDF = u'\u202c' |
+ |
+def PseudoRTLString(text): |
+ '''Returns a fake bidirectional version of the source string. This code is |
+ based on accentString above, in turn copied from Frank Tang. |
+ ''' |
+ parts = [] |
+ while text: |
+ m = None |
+ for token in TOKENS: |
+ m = token.search(text) |
+ if m: |
+ part = m.group(0) |
+ text = text[len(part):] |
+ if part[0] not in ('<', '&'): |
+ # not a tag or entity, so accent |
+ part = ALPHABETIC_RUN.sub(lambda run: RLO + run.group() + PDF, part) |
+ parts.append(part) |
+ break |
+ return ''.join(parts) |
+ |
+ |
+def PseudoRTLMessage(message): |
+ '''Returns a pseudo-RTL (aka Fake-Bidi) translation of the provided message. |
+ |
+ Args: |
+ message: tclib.Message() |
+ |
+ Return: |
+ tclib.Translation() |
+ ''' |
+ transl = tclib.Translation() |
+ for part in message.GetContent(): |
+ if isinstance(part, tclib.Placeholder): |
+ transl.AppendPlaceholder(part) |
+ else: |
+ transl.AppendText(PseudoRTLString(part)) |
+ |
+ return transl |
Property changes on: grit/pseudo_rtl.py |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |