--- /dev/null
+ Copyright 2008 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
--- /dev/null
+
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--- /dev/null
+=CSSJanus=
+
+_Flips CSS from LTR to an RTL orienation and vice-versa_
+
+Author: `Lindsey Simon <elsigh@google.com>`
+
+==Introduction==
+
+CSSJanus is CSS parser utility designed to aid the conversion of a website's
+layout from left-to-right(LTR) to right-to-left(RTL). The script was born out of
+a need to convert CSS for RTL languages when tables are not being used for layout (since tables will automatically reorder TD's in RTL).
+CSSJanus will change most of the obvious CSS property names and their values as
+well as some not-so-obvious ones (cursor, background-position %, etc...).
+The script is designed to offer flexibility to account for cases when you do
+not want to change certain rules which exist to account for bidirectional text
+display bugs, as well as situations where you may or may not want to flip annotations inside of the background url string.
+Note that you can disable CSSJanus from running on an entire class or any
+rule within a class by prepending a /* @noflip */ comment before the rule(s)
+you want CSSJanus to ignore.
+
+CSSJanus itself is not always enough to make a website that works in a LTR
+language context work in a RTL language all the way, but it is a start.
+
+==Getting the code==
+
+View the trunk at:
+
+ http://cssjanus.googlecode.com/svn/trunk/
+
+Check out the latest development version anonymously with:
+
+{{{
+ $ svn checkout http://cssjanus.googlecode.com/svn/trunk/ cssjanus
+}}}
+
+==Using==
+
+Usage:
+ ./cssjanus.py < file.css > file-rtl.css
+Flags:
+ --swap_left_right_in_url: Fixes "left"/"right" string within urls.
+ Ex: ./cssjanus.py --swap_left_right_in_url < file.css > file_rtl.css
+ --swap_ltr_rtl_in_url: Fixes "ltr"/"rtl" string within urls.
+ Ex: ./cssjanus.py --swap_ltr_rtl_in_url < file.css > file_rtl.css
+
+If you'd like to make use of the webapp version of cssjanus, you'll need to
+download the Google App Engine SDK
+ http://code.google.com/appengine/downloads.html
+and also drop a "django" directory into this directory, with the latest svn
+from django. You should be good to go with that setup. Please let me know
+otherwise.
+
+==Bugs, Patches==
+
+Patches and bug reports are welcome, just please keep the style
+consistent with the original source. If you find a bug, please include a diff
+of cssjanus_test.py with the bug included as a new unit test which fails. It
+will make understanding and fixing the bug easier.
+
+==Todo==
+
+* Include some helpers for some typical bidi text solutions?
+* Aural CSS (azimuth) swapping?
+
+==Contributors==
+
+Additional thanks to Mike Samuel for his work on csslex.py, Andy Perelson for
+his help coding and reviewing, Stephen Zabel for his help with i18n and my sanity,
+and to Eric Meyer for his thoughtful input.
+Thanks to Junyu Wang for the Chinese translation.
+Thanks to Masashi Kawashima for the Japanese translation.
+Thanks to Taaryk Taar and Tariq Al-Omaireeni for an updated Arabic translation.
+Thanks to Jens Meiert for the German translation.
+
+==License==
+
+{{{
+ Copyright 2008 Google Inc. All Rights Reserved.
+
+ Licensed under the Apache License, Version 2.0 (the 'License');
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an 'AS IS' BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+}}}
--- /dev/null
+#!/usr/bin/python
+#
+# Copyright 2008 Google Inc. All Rights Reserved.
+
+"""Converts a LeftToRight Cascading Style Sheet into a RightToLeft one.
+
+ This is a utility script for replacing "left" oriented things in a CSS file
+ like float, padding, margin with "right" oriented values.
+ It also does the opposite.
+ The goal is to be able to conditionally serve one large, cat'd, compiled CSS
+ file appropriate for LeftToRight oriented languages and RightToLeft ones.
+ This utility will hopefully help your structural layout done in CSS in
+ terms of its RTL compatibility. It will not help with some of the more
+ complicated bidirectional text issues.
+"""
+
+__author__ = 'elsigh@google.com (Lindsey Simon)'
+__version__ = '0.1'
+
+import logging
+import re
+import sys
+import getopt
+import os
+
+import csslex
+
+logging.getLogger().setLevel(logging.INFO)
+
+# Global for the command line flags.
+SWAP_LTR_RTL_IN_URL_DEFAULT = False
+SWAP_LEFT_RIGHT_IN_URL_DEFAULT = False
+FLAGS = {'swap_ltr_rtl_in_url': SWAP_LTR_RTL_IN_URL_DEFAULT,
+ 'swap_left_right_in_url': SWAP_LEFT_RIGHT_IN_URL_DEFAULT}
+
+# Generic token delimiter character.
+TOKEN_DELIMITER = '~'
+
+# This is a temporary match token we use when swapping strings.
+TMP_TOKEN = '%sTMP%s' % (TOKEN_DELIMITER, TOKEN_DELIMITER)
+
+# Token to be used for joining lines.
+TOKEN_LINES = '%sJ%s' % (TOKEN_DELIMITER, TOKEN_DELIMITER)
+
+# Global constant text strings for CSS value matches.
+LTR = 'ltr'
+RTL = 'rtl'
+LEFT = 'left'
+RIGHT = 'right'
+
+# This is a lookbehind match to ensure that we don't replace instances
+# of our string token (left, rtl, etc...) if there's a letter in front of it.
+# Specifically, this prevents replacements like 'background: url(bright.png)'.
+LOOKBEHIND_NOT_LETTER = r'(?<![a-zA-Z])'
+
+# This is a lookahead match to make sure we don't replace left and right
+# in actual classnames, so that we don't break the HTML/CSS dependencies.
+# Read literally, it says ignore cases where the word left, for instance, is
+# directly followed by valid classname characters and a curly brace.
+# ex: .column-left {float: left} will become .column-left {float: right}
+LOOKAHEAD_NOT_OPEN_BRACE = (r'(?!(?:%s|%s|%s|#|\:|\.|\,|\+|>)*?{)' %
+ (csslex.NMCHAR, TOKEN_LINES, csslex.SPACE))
+
+
+# These two lookaheads are to test whether or not we are within a
+# background: url(HERE) situation.
+# Ref: http://www.w3.org/TR/CSS21/syndata.html#uri
+VALID_AFTER_URI_CHARS = r'[\'\"]?%s' % csslex.WHITESPACE
+LOOKAHEAD_NOT_CLOSING_PAREN = r'(?!%s?%s\))' % (csslex.URL_CHARS,
+ VALID_AFTER_URI_CHARS)
+LOOKAHEAD_FOR_CLOSING_PAREN = r'(?=%s?%s\))' % (csslex.URL_CHARS,
+ VALID_AFTER_URI_CHARS)
+
+# Compile a regex to swap left and right values in 4 part notations.
+# We need to match negatives and decimal numeric values.
+# ex. 'margin: .25em -2px 3px 0' becomes 'margin: .25em 0 3px -2px'.
+POSSIBLY_NEGATIVE_QUANTITY = r'((?:-?%s)|(?:inherit|auto))' % csslex.QUANTITY
+POSSIBLY_NEGATIVE_QUANTITY_SPACE = r'%s%s%s' % (POSSIBLY_NEGATIVE_QUANTITY,
+ csslex.SPACE,
+ csslex.WHITESPACE)
+FOUR_NOTATION_QUANTITY_RE = re.compile(r'%s%s%s%s' %
+ (POSSIBLY_NEGATIVE_QUANTITY_SPACE,
+ POSSIBLY_NEGATIVE_QUANTITY_SPACE,
+ POSSIBLY_NEGATIVE_QUANTITY_SPACE,
+ POSSIBLY_NEGATIVE_QUANTITY),
+ re.I)
+COLOR = r'(%s|%s)' % (csslex.NAME, csslex.HASH)
+COLOR_SPACE = r'%s%s' % (COLOR, csslex.SPACE)
+FOUR_NOTATION_COLOR_RE = re.compile(r'(-color%s:%s)%s%s%s(%s)' %
+ (csslex.WHITESPACE,
+ csslex.WHITESPACE,
+ COLOR_SPACE,
+ COLOR_SPACE,
+ COLOR_SPACE,
+ COLOR),
+ re.I)
+
+# Compile the cursor resize regexes
+CURSOR_EAST_RE = re.compile(LOOKBEHIND_NOT_LETTER + '([ns]?)e-resize')
+CURSOR_WEST_RE = re.compile(LOOKBEHIND_NOT_LETTER + '([ns]?)w-resize')
+
+# Matches the condition where we need to replace the horizontal component
+# of a background-position value when expressed in horizontal percentage.
+# Had to make two regexes because in the case of position-x there is only
+# one quantity, and otherwise we don't want to match and change cases with only
+# one quantity.
+BG_HORIZONTAL_PERCENTAGE_RE = re.compile(r'background(-position)?(%s:%s)'
+ '([^%%]*?)(%s)%%'
+ '(%s(?:%s|%s))' % (csslex.WHITESPACE,
+ csslex.WHITESPACE,
+ csslex.NUM,
+ csslex.WHITESPACE,
+ csslex.QUANTITY,
+ csslex.IDENT))
+
+BG_HORIZONTAL_PERCENTAGE_X_RE = re.compile(r'background-position-x(%s:%s)'
+ '(%s)%%' % (csslex.WHITESPACE,
+ csslex.WHITESPACE,
+ csslex.NUM))
+
+# Matches the opening of a body selector.
+BODY_SELECTOR = r'body%s{%s' % (csslex.WHITESPACE, csslex.WHITESPACE)
+
+# Matches anything up until the closing of a selector.
+CHARS_WITHIN_SELECTOR = r'[^\}]*?'
+
+# Matches the direction property in a selector.
+DIRECTION_RE = r'direction%s:%s' % (csslex.WHITESPACE, csslex.WHITESPACE)
+
+# These allow us to swap "ltr" with "rtl" and vice versa ONLY within the
+# body selector and on the same line.
+BODY_DIRECTION_LTR_RE = re.compile(r'(%s)(%s)(%s)(ltr)' %
+ (BODY_SELECTOR, CHARS_WITHIN_SELECTOR,
+ DIRECTION_RE),
+ re.I)
+BODY_DIRECTION_RTL_RE = re.compile(r'(%s)(%s)(%s)(rtl)' %
+ (BODY_SELECTOR, CHARS_WITHIN_SELECTOR,
+ DIRECTION_RE),
+ re.I)
+
+
+# Allows us to swap "direction:ltr" with "direction:rtl" and
+# vice versa anywhere in a line.
+DIRECTION_LTR_RE = re.compile(r'%s(ltr)' % DIRECTION_RE)
+DIRECTION_RTL_RE = re.compile(r'%s(rtl)' % DIRECTION_RE)
+
+# We want to be able to switch left with right and vice versa anywhere
+# we encounter left/right strings, EXCEPT inside the background:url(). The next
+# two regexes are for that purpose. We have alternate IN_URL versions of the
+# regexes compiled in case the user passes the flag that they do
+# actually want to have left and right swapped inside of background:urls.
+LEFT_RE = re.compile('%s(%s)%s%s' % (LOOKBEHIND_NOT_LETTER,
+ LEFT,
+ LOOKAHEAD_NOT_CLOSING_PAREN,
+ LOOKAHEAD_NOT_OPEN_BRACE),
+ re.I)
+RIGHT_RE = re.compile('%s(%s)%s%s' % (LOOKBEHIND_NOT_LETTER,
+ RIGHT,
+ LOOKAHEAD_NOT_CLOSING_PAREN,
+ LOOKAHEAD_NOT_OPEN_BRACE),
+ re.I)
+LEFT_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
+ LEFT,
+ LOOKAHEAD_FOR_CLOSING_PAREN),
+ re.I)
+RIGHT_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
+ RIGHT,
+ LOOKAHEAD_FOR_CLOSING_PAREN),
+ re.I)
+LTR_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
+ LTR,
+ LOOKAHEAD_FOR_CLOSING_PAREN),
+ re.I)
+RTL_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
+ RTL,
+ LOOKAHEAD_FOR_CLOSING_PAREN),
+ re.I)
+
+COMMENT_RE = re.compile('(%s)' % csslex.COMMENT, re.I)
+
+NOFLIP_TOKEN = r'\@noflip'
+# The NOFLIP_TOKEN inside of a comment. For now, this requires that comments
+# be in the input, which means users of a css compiler would have to run
+# this script first if they want this functionality.
+NOFLIP_ANNOTATION = r'/\*%s%s%s\*/' % (csslex.WHITESPACE,
+ NOFLIP_TOKEN,
+ csslex. WHITESPACE)
+
+# After a NOFLIP_ANNOTATION, and within a class selector, we want to be able
+# to set aside a single rule not to be flipped. We can do this by matching
+# our NOFLIP annotation and then using a lookahead to make sure there is not
+# an opening brace before the match.
+NOFLIP_SINGLE_RE = re.compile(r'(%s%s[^;}]+;?)' % (NOFLIP_ANNOTATION,
+ LOOKAHEAD_NOT_OPEN_BRACE),
+ re.I)
+
+# After a NOFLIP_ANNOTATION, we want to grab anything up until the next } which
+# means the entire following class block. This will prevent all of its
+# declarations from being flipped.
+NOFLIP_CLASS_RE = re.compile(r'(%s%s})' % (NOFLIP_ANNOTATION,
+ CHARS_WITHIN_SELECTOR),
+ re.I)
+
+
+class Tokenizer:
+ """Replaces any CSS comments with string tokens and vice versa."""
+
+ def __init__(self, token_re, token_string):
+ """Constructor for the Tokenizer.
+
+ Args:
+ token_re: A regex for the string to be replace by a token.
+ token_string: The string to put between token delimiters when tokenizing.
+ """
+ logging.debug('Tokenizer::init token_string=%s' % token_string)
+ self.token_re = token_re
+ self.token_string = token_string
+ self.originals = []
+
+ def Tokenize(self, line):
+ """Replaces any string matching token_re in line with string tokens.
+
+ By passing a function as an argument to the re.sub line below, we bypass
+ the usual rule where re.sub will only replace the left-most occurrence of
+ a match by calling the passed in function for each occurrence.
+
+ Args:
+ line: A line to replace token_re matches in.
+
+ Returns:
+ line: A line with token_re matches tokenized.
+ """
+ line = self.token_re.sub(self.TokenizeMatches, line)
+ logging.debug('Tokenizer::Tokenize returns: %s' % line)
+ return line
+
+ def DeTokenize(self, line):
+ """Replaces tokens with the original string.
+
+ Args:
+ line: A line with tokens.
+
+ Returns:
+ line with any tokens replaced by the original string.
+ """
+
+ # Put all of the comments back in by their comment token.
+ for i, original in enumerate(self.originals):
+ token = '%s%s_%s%s' % (TOKEN_DELIMITER, self.token_string, i + 1,
+ TOKEN_DELIMITER)
+ line = line.replace(token, original)
+ logging.debug('Tokenizer::DeTokenize i:%s w/%s' % (i, token))
+ logging.debug('Tokenizer::DeTokenize returns: %s' % line)
+ return line
+
+ def TokenizeMatches(self, m):
+ """Replaces matches with tokens and stores the originals.
+
+ Args:
+ m: A match object.
+
+ Returns:
+ A string token which replaces the CSS comment.
+ """
+ logging.debug('Tokenizer::TokenizeMatches %s' % m.group(1))
+ self.originals.append(m.group(1))
+ return '%s%s_%s%s' % (TOKEN_DELIMITER,
+ self.token_string,
+ len(self.originals),
+ TOKEN_DELIMITER)
+
+
+def FixBodyDirectionLtrAndRtl(line):
+ """Replaces ltr with rtl and vice versa ONLY in the body direction.
+
+ Args:
+ line: A string to replace instances of ltr with rtl.
+ Returns:
+ line with direction: ltr and direction: rtl swapped only in body selector.
+ line = FixBodyDirectionLtrAndRtl('body { direction:ltr }')
+ line will now be 'body { direction:rtl }'.
+ """
+
+ line = BODY_DIRECTION_LTR_RE.sub('\\1\\2\\3%s' % TMP_TOKEN, line)
+ line = BODY_DIRECTION_RTL_RE.sub('\\1\\2\\3%s' % LTR, line)
+ line = line.replace(TMP_TOKEN, RTL)
+ logging.debug('FixBodyDirectionLtrAndRtl returns: %s' % line)
+ return line
+
+
+def FixLeftAndRight(line):
+ """Replaces left with right and vice versa in line.
+
+ Args:
+ line: A string in which to perform the replacement.
+
+ Returns:
+ line with left and right swapped. For example:
+ line = FixLeftAndRight('padding-left: 2px; margin-right: 1px;')
+ line will now be 'padding-right: 2px; margin-left: 1px;'.
+ """
+
+ line = LEFT_RE.sub(TMP_TOKEN, line)
+ line = RIGHT_RE.sub(LEFT, line)
+ line = line.replace(TMP_TOKEN, RIGHT)
+ logging.debug('FixLeftAndRight returns: %s' % line)
+ return line
+
+
+def FixLeftAndRightInUrl(line):
+ """Replaces left with right and vice versa ONLY within background urls.
+
+ Args:
+ line: A string in which to replace left with right and vice versa.
+
+ Returns:
+ line with left and right swapped in the url string. For example:
+ line = FixLeftAndRightInUrl('background:url(right.png)')
+ line will now be 'background:url(left.png)'.
+ """
+
+ line = LEFT_IN_URL_RE.sub(TMP_TOKEN, line)
+ line = RIGHT_IN_URL_RE.sub(LEFT, line)
+ line = line.replace(TMP_TOKEN, RIGHT)
+ logging.debug('FixLeftAndRightInUrl returns: %s' % line)
+ return line
+
+
+def FixLtrAndRtlInUrl(line):
+ """Replaces ltr with rtl and vice versa ONLY within background urls.
+
+ Args:
+ line: A string in which to replace ltr with rtl and vice versa.
+
+ Returns:
+ line with left and right swapped. For example:
+ line = FixLtrAndRtlInUrl('background:url(rtl.png)')
+ line will now be 'background:url(ltr.png)'.
+ """
+
+ line = LTR_IN_URL_RE.sub(TMP_TOKEN, line)
+ line = RTL_IN_URL_RE.sub(LTR, line)
+ line = line.replace(TMP_TOKEN, RTL)
+ logging.debug('FixLtrAndRtlInUrl returns: %s' % line)
+ return line
+
+
+def FixCursorProperties(line):
+ """Fixes directional CSS cursor properties.
+
+ Args:
+ line: A string to fix CSS cursor properties in.
+
+ Returns:
+ line reformatted with the cursor properties substituted. For example:
+ line = FixCursorProperties('cursor: ne-resize')
+ line will now be 'cursor: nw-resize'.
+ """
+
+ line = CURSOR_EAST_RE.sub('\\1' + TMP_TOKEN, line)
+ line = CURSOR_WEST_RE.sub('\\1e-resize', line)
+ line = line.replace(TMP_TOKEN, 'w-resize')
+ logging.debug('FixCursorProperties returns: %s' % line)
+ return line
+
+
+def FixFourPartNotation(line):
+ """Fixes the second and fourth positions in 4 part CSS notation.
+
+ Args:
+ line: A string to fix 4 part CSS notation in.
+
+ Returns:
+ line reformatted with the 4 part notations swapped. For example:
+ line = FixFourPartNotation('padding: 1px 2px 3px 4px')
+ line will now be 'padding: 1px 4px 3px 2px'.
+ """
+ line = FOUR_NOTATION_QUANTITY_RE.sub('\\1 \\4 \\3 \\2', line)
+ line = FOUR_NOTATION_COLOR_RE.sub('\\1\\2 \\5 \\4 \\3', line)
+ logging.debug('FixFourPartNotation returns: %s' % line)
+ return line
+
+
+def FixBackgroundPosition(line):
+ """Fixes horizontal background percentage values in line.
+
+ Args:
+ line: A string to fix horizontal background position values in.
+
+ Returns:
+ line reformatted with the 4 part notations swapped.
+ """
+ line = BG_HORIZONTAL_PERCENTAGE_RE.sub(CalculateNewBackgroundPosition, line)
+ line = BG_HORIZONTAL_PERCENTAGE_X_RE.sub(CalculateNewBackgroundPositionX,
+ line)
+ logging.debug('FixBackgroundPosition returns: %s' % line)
+ return line
+
+
+def CalculateNewBackgroundPosition(m):
+ """Fixes horizontal background-position percentages.
+
+ This function should be used as an argument to re.sub since it needs to
+ perform replacement specific calculations.
+
+ Args:
+ m: A match object.
+
+ Returns:
+ A string with the horizontal background position percentage fixed.
+ BG_HORIZONTAL_PERCENTAGE_RE.sub(FixBackgroundPosition,
+ 'background-position: 75% 50%')
+ will return 'background-position: 25% 50%'.
+ """
+
+ # The flipped value is the offset from 100%
+ new_x = str(100-int(m.group(4)))
+
+ # Since m.group(1) may very well be None type and we need a string..
+ if m.group(1):
+ position_string = m.group(1)
+ else:
+ position_string = ''
+
+ return 'background%s%s%s%s%%%s' % (position_string, m.group(2), m.group(3),
+ new_x, m.group(5))
+
+
+def CalculateNewBackgroundPositionX(m):
+ """Fixes percent based background-position-x.
+
+ This function should be used as an argument to re.sub since it needs to
+ perform replacement specific calculations.
+
+ Args:
+ m: A match object.
+
+ Returns:
+ A string with the background-position-x percentage fixed.
+ BG_HORIZONTAL_PERCENTAGE_X_RE.sub(CalculateNewBackgroundPosition,
+ 'background-position-x: 75%')
+ will return 'background-position-x: 25%'.
+ """
+
+ # The flipped value is the offset from 100%
+ new_x = str(100-int(m.group(2)))
+
+ return 'background-position-x%s%s%%' % (m.group(1), new_x)
+
+
+def ChangeLeftToRightToLeft(lines,
+ swap_ltr_rtl_in_url=None,
+ swap_left_right_in_url=None):
+ """Turns lines into a stream and runs the fixing functions against it.
+
+ Args:
+ lines: An list of CSS lines.
+ swap_ltr_rtl_in_url: Overrides this flag if param is set.
+ swap_left_right_in_url: Overrides this flag if param is set.
+
+ Returns:
+ The same lines, but with left and right fixes.
+ """
+
+ global FLAGS
+
+ # Possibly override flags with params.
+ logging.debug('ChangeLeftToRightToLeft swap_ltr_rtl_in_url=%s, '
+ 'swap_left_right_in_url=%s' % (swap_ltr_rtl_in_url,
+ swap_left_right_in_url))
+ if swap_ltr_rtl_in_url is None:
+ swap_ltr_rtl_in_url = FLAGS['swap_ltr_rtl_in_url']
+ if swap_left_right_in_url is None:
+ swap_left_right_in_url = FLAGS['swap_left_right_in_url']
+
+ # Turns the array of lines into a single line stream.
+ logging.debug('LINES COUNT: %s' % len(lines))
+ line = TOKEN_LINES.join(lines)
+
+ # Tokenize any single line rules with the /* noflip */ annotation.
+ noflip_single_tokenizer = Tokenizer(NOFLIP_SINGLE_RE, 'NOFLIP_SINGLE')
+ line = noflip_single_tokenizer.Tokenize(line)
+
+ # Tokenize any class rules with the /* noflip */ annotation.
+ noflip_class_tokenizer = Tokenizer(NOFLIP_CLASS_RE, 'NOFLIP_CLASS')
+ line = noflip_class_tokenizer.Tokenize(line)
+
+ # Tokenize the comments so we can preserve them through the changes.
+ comment_tokenizer = Tokenizer(COMMENT_RE, 'C')
+ line = comment_tokenizer.Tokenize(line)
+
+ # Here starteth the various left/right orientation fixes.
+ line = FixBodyDirectionLtrAndRtl(line)
+
+ if swap_left_right_in_url:
+ line = FixLeftAndRightInUrl(line)
+
+ if swap_ltr_rtl_in_url:
+ line = FixLtrAndRtlInUrl(line)
+
+ line = FixLeftAndRight(line)
+ line = FixCursorProperties(line)
+ line = FixFourPartNotation(line)
+ line = FixBackgroundPosition(line)
+
+ # DeTokenize the single line noflips.
+ line = noflip_single_tokenizer.DeTokenize(line)
+
+ # DeTokenize the class-level noflips.
+ line = noflip_class_tokenizer.DeTokenize(line)
+
+ # DeTokenize the comments.
+ line = comment_tokenizer.DeTokenize(line)
+
+ # Rejoin the lines back together.
+ lines = line.split(TOKEN_LINES)
+
+ return lines
+
+def usage():
+ """Prints out usage information."""
+
+ print 'Usage:'
+ print ' ./cssjanus.py < file.css > file-rtl.css'
+ print 'Flags:'
+ print ' --swap_left_right_in_url: Fixes "left"/"right" string within urls.'
+ print ' Ex: ./cssjanus.py --swap_left_right_in_url < file.css > file_rtl.css'
+ print ' --swap_ltr_rtl_in_url: Fixes "ltr"/"rtl" string within urls.'
+ print ' Ex: ./cssjanus --swap_ltr_rtl_in_url < file.css > file_rtl.css'
+
+def setflags(opts):
+ """Parse the passed in command line arguments and set the FLAGS global.
+
+ Args:
+ opts: getopt iterable intercepted from argv.
+ """
+
+ global FLAGS
+
+ # Parse the arguments.
+ for opt, arg in opts:
+ logging.debug('opt: %s, arg: %s' % (opt, arg))
+ if opt in ("-h", "--help"):
+ usage()
+ sys.exit()
+ elif opt in ("-d", "--debug"):
+ logging.getLogger().setLevel(logging.DEBUG)
+ elif opt == '--swap_ltr_rtl_in_url':
+ FLAGS['swap_ltr_rtl_in_url'] = True
+ elif opt == '--swap_left_right_in_url':
+ FLAGS['swap_left_right_in_url'] = True
+
+
+def main(argv):
+ """Sends stdin lines to ChangeLeftToRightToLeft and writes to stdout."""
+
+ # Define the flags.
+ try:
+ opts, args = getopt.getopt(argv, 'hd', ['help', 'debug',
+ 'swap_left_right_in_url',
+ 'swap_ltr_rtl_in_url'])
+ except getopt.GetoptError:
+ usage()
+ sys.exit(2)
+
+ # Parse and set the flags.
+ setflags(opts)
+
+ # Call the main routine with all our functionality.
+ fixed_lines = ChangeLeftToRightToLeft(sys.stdin.readlines())
+ sys.stdout.write(''.join(fixed_lines))
+
+if __name__ == '__main__':
+ main(sys.argv[1:])
--- /dev/null
+#!/usr/bin/python
+#
+# Copyright 2007 Google Inc. All Rights Reserved.
+
+"""CSS Lexical Grammar rules.
+
+CSS lexical grammar from http://www.w3.org/TR/CSS21/grammar.html
+"""
+
+__author__ = ['elsigh@google.com (Lindsey Simon)',
+ 'msamuel@google.com (Mike Samuel)']
+
+# public symbols
+__all__ = [ "NEWLINE", "HEX", "NON_ASCII", "UNICODE", "ESCAPE", "NMSTART", "NMCHAR", "STRING1", "STRING2", "IDENT", "NAME", "HASH", "NUM", "STRING", "URL", "SPACE", "WHITESPACE", "COMMENT", "QUANTITY", "PUNC" ]
+
+# The comments below are mostly copied verbatim from the grammar.
+
+# "@import" {return IMPORT_SYM;}
+# "@page" {return PAGE_SYM;}
+# "@media" {return MEDIA_SYM;}
+# "@charset" {return CHARSET_SYM;}
+KEYWORD = r'(?:\@(?:import|page|media|charset))'
+
+# nl \n|\r\n|\r|\f ; a newline
+NEWLINE = r'\n|\r\n|\r|\f'
+
+# h [0-9a-f] ; a hexadecimal digit
+HEX = r'[0-9a-f]'
+
+# nonascii [\200-\377]
+NON_ASCII = r'[\200-\377]'
+
+# unicode \\{h}{1,6}(\r\n|[ \t\r\n\f])?
+UNICODE = r'(?:(?:\\' + HEX + r'{1,6})(?:\r\n|[ \t\r\n\f])?)'
+
+# escape {unicode}|\\[^\r\n\f0-9a-f]
+ESCAPE = r'(?:' + UNICODE + r'|\\[^\r\n\f0-9a-f])'
+
+# nmstart [_a-z]|{nonascii}|{escape}
+NMSTART = r'(?:[_a-z]|' + NON_ASCII + r'|' + ESCAPE + r')'
+
+# nmchar [_a-z0-9-]|{nonascii}|{escape}
+NMCHAR = r'(?:[_a-z0-9-]|' + NON_ASCII + r'|' + ESCAPE + r')'
+
+# ident -?{nmstart}{nmchar}*
+IDENT = r'-?' + NMSTART + NMCHAR + '*'
+
+# name {nmchar}+
+NAME = NMCHAR + r'+'
+
+# hash
+HASH = r'#' + NAME
+
+# string1 \"([^\n\r\f\\"]|\\{nl}|{escape})*\" ; "string"
+STRING1 = r'"(?:[^\"\\]|\\.)*"'
+
+# string2 \'([^\n\r\f\\']|\\{nl}|{escape})*\' ; 'string'
+STRING2 = r"'(?:[^\'\\]|\\.)*'"
+
+# string {string1}|{string2}
+STRING = '(?:' + STRING1 + r'|' + STRING2 + ')'
+
+# num [0-9]+|[0-9]*"."[0-9]+
+NUM = r'(?:[0-9]*\.[0-9]+|[0-9]+)'
+
+# s [ \t\r\n\f]
+SPACE = r'[ \t\r\n\f]'
+
+# w {s}*
+WHITESPACE = '(?:' + SPACE + r'*)'
+
+# url special chars
+URL_SPECIAL_CHARS = r'[!#$%&*-~]'
+
+# url chars ({url_special_chars}|{nonascii}|{escape})*
+URL_CHARS = r'(?:%s|%s|%s)*' % (URL_SPECIAL_CHARS, NON_ASCII, ESCAPE)
+
+# url
+URL = r'url\(%s(%s|%s)%s\)' % (WHITESPACE, STRING, URL_CHARS, WHITESPACE)
+
+# comments
+# see http://www.w3.org/TR/CSS21/grammar.html
+COMMENT = r'/\*[^*]*\*+([^/*][^*]*\*+)*/'
+
+# {E}{M} {return EMS;}
+# {E}{X} {return EXS;}
+# {P}{X} {return LENGTH;}
+# {C}{M} {return LENGTH;}
+# {M}{M} {return LENGTH;}
+# {I}{N} {return LENGTH;}
+# {P}{T} {return LENGTH;}
+# {P}{C} {return LENGTH;}
+# {D}{E}{G} {return ANGLE;}
+# {R}{A}{D} {return ANGLE;}
+# {G}{R}{A}{D} {return ANGLE;}
+# {M}{S} {return TIME;}
+# {S} {return TIME;}
+# {H}{Z} {return FREQ;}
+# {K}{H}{Z} {return FREQ;}
+# % {return PERCENTAGE;}
+UNIT = r'(?:em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)'
+
+# {num}{UNIT|IDENT} {return NUMBER;}
+QUANTITY = '%s(?:%s%s|%s)?' % (NUM, WHITESPACE, UNIT, IDENT)
+
+# "<!--" {return CDO;}
+# "-->" {return CDC;}
+# "~=" {return INCLUDES;}
+# "|=" {return DASHMATCH;}
+# {w}"{" {return LBRACE;}
+# {w}"+" {return PLUS;}
+# {w}">" {return GREATER;}
+# {w}"," {return COMMA;}
+PUNC = r'<!--|-->|~=|\|=|[\{\+>,:;]'
all: main-rtl.css
-main-rtl.css: main-ltr.css cssjanus/cssjanus.py
- python cssjanus/cssjanus.py --swap_ltr_rtl_in_url < main-ltr.css > main-rtl.css
+main-rtl.css: main-ltr.css ../../maintenance/cssjanus/cssjanus.py
+ python ../../maintenance/cssjanus/cssjanus.py --swap_ltr_rtl_in_url < main-ltr.css > main-rtl.css
# SVN version is broken; checking in our own.
-#cssjanus/cssjanus.py:
-# svn co http://cssjanus.googlecode.com/svn/trunk cssjanus
+#../../maintenance/cssjanus/cssjanus.py:
+# svn co http://cssjanus.googlecode.com/svn/trunk ../maintenance/cssjanus
#distclean: clean
# rm -rf cssjanus
+++ /dev/null
- Copyright 2008 Google Inc.
-
- Licensed under the Apache License, Version 2.0 (the "License");
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an "AS IS" BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
+++ /dev/null
-
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+++ /dev/null
-=CSSJanus=
-
-_Flips CSS from LTR to an RTL orienation and vice-versa_
-
-Author: `Lindsey Simon <elsigh@google.com>`
-
-==Introduction==
-
-CSSJanus is CSS parser utility designed to aid the conversion of a website's
-layout from left-to-right(LTR) to right-to-left(RTL). The script was born out of
-a need to convert CSS for RTL languages when tables are not being used for layout (since tables will automatically reorder TD's in RTL).
-CSSJanus will change most of the obvious CSS property names and their values as
-well as some not-so-obvious ones (cursor, background-position %, etc...).
-The script is designed to offer flexibility to account for cases when you do
-not want to change certain rules which exist to account for bidirectional text
-display bugs, as well as situations where you may or may not want to flip annotations inside of the background url string.
-Note that you can disable CSSJanus from running on an entire class or any
-rule within a class by prepending a /* @noflip */ comment before the rule(s)
-you want CSSJanus to ignore.
-
-CSSJanus itself is not always enough to make a website that works in a LTR
-language context work in a RTL language all the way, but it is a start.
-
-==Getting the code==
-
-View the trunk at:
-
- http://cssjanus.googlecode.com/svn/trunk/
-
-Check out the latest development version anonymously with:
-
-{{{
- $ svn checkout http://cssjanus.googlecode.com/svn/trunk/ cssjanus
-}}}
-
-==Using==
-
-Usage:
- ./cssjanus.py < file.css > file-rtl.css
-Flags:
- --swap_left_right_in_url: Fixes "left"/"right" string within urls.
- Ex: ./cssjanus.py --swap_left_right_in_url < file.css > file_rtl.css
- --swap_ltr_rtl_in_url: Fixes "ltr"/"rtl" string within urls.
- Ex: ./cssjanus.py --swap_ltr_rtl_in_url < file.css > file_rtl.css
-
-If you'd like to make use of the webapp version of cssjanus, you'll need to
-download the Google App Engine SDK
- http://code.google.com/appengine/downloads.html
-and also drop a "django" directory into this directory, with the latest svn
-from django. You should be good to go with that setup. Please let me know
-otherwise.
-
-==Bugs, Patches==
-
-Patches and bug reports are welcome, just please keep the style
-consistent with the original source. If you find a bug, please include a diff
-of cssjanus_test.py with the bug included as a new unit test which fails. It
-will make understanding and fixing the bug easier.
-
-==Todo==
-
-* Include some helpers for some typical bidi text solutions?
-* Aural CSS (azimuth) swapping?
-
-==Contributors==
-
-Additional thanks to Mike Samuel for his work on csslex.py, Andy Perelson for
-his help coding and reviewing, Stephen Zabel for his help with i18n and my sanity,
-and to Eric Meyer for his thoughtful input.
-Thanks to Junyu Wang for the Chinese translation.
-Thanks to Masashi Kawashima for the Japanese translation.
-Thanks to Taaryk Taar and Tariq Al-Omaireeni for an updated Arabic translation.
-Thanks to Jens Meiert for the German translation.
-
-==License==
-
-{{{
- Copyright 2008 Google Inc. All Rights Reserved.
-
- Licensed under the Apache License, Version 2.0 (the 'License');
- you may not use this file except in compliance with the License.
- You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
- Unless required by applicable law or agreed to in writing, software
- distributed under the License is distributed on an 'AS IS' BASIS,
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and
- limitations under the License.
-}}}
+++ /dev/null
-#!/usr/bin/python
-#
-# Copyright 2008 Google Inc. All Rights Reserved.
-
-"""Converts a LeftToRight Cascading Style Sheet into a RightToLeft one.
-
- This is a utility script for replacing "left" oriented things in a CSS file
- like float, padding, margin with "right" oriented values.
- It also does the opposite.
- The goal is to be able to conditionally serve one large, cat'd, compiled CSS
- file appropriate for LeftToRight oriented languages and RightToLeft ones.
- This utility will hopefully help your structural layout done in CSS in
- terms of its RTL compatibility. It will not help with some of the more
- complicated bidirectional text issues.
-"""
-
-__author__ = 'elsigh@google.com (Lindsey Simon)'
-__version__ = '0.1'
-
-import logging
-import re
-import sys
-import getopt
-import os
-
-import csslex
-
-logging.getLogger().setLevel(logging.INFO)
-
-# Global for the command line flags.
-SWAP_LTR_RTL_IN_URL_DEFAULT = False
-SWAP_LEFT_RIGHT_IN_URL_DEFAULT = False
-FLAGS = {'swap_ltr_rtl_in_url': SWAP_LTR_RTL_IN_URL_DEFAULT,
- 'swap_left_right_in_url': SWAP_LEFT_RIGHT_IN_URL_DEFAULT}
-
-# Generic token delimiter character.
-TOKEN_DELIMITER = '~'
-
-# This is a temporary match token we use when swapping strings.
-TMP_TOKEN = '%sTMP%s' % (TOKEN_DELIMITER, TOKEN_DELIMITER)
-
-# Token to be used for joining lines.
-TOKEN_LINES = '%sJ%s' % (TOKEN_DELIMITER, TOKEN_DELIMITER)
-
-# Global constant text strings for CSS value matches.
-LTR = 'ltr'
-RTL = 'rtl'
-LEFT = 'left'
-RIGHT = 'right'
-
-# This is a lookbehind match to ensure that we don't replace instances
-# of our string token (left, rtl, etc...) if there's a letter in front of it.
-# Specifically, this prevents replacements like 'background: url(bright.png)'.
-LOOKBEHIND_NOT_LETTER = r'(?<![a-zA-Z])'
-
-# This is a lookahead match to make sure we don't replace left and right
-# in actual classnames, so that we don't break the HTML/CSS dependencies.
-# Read literally, it says ignore cases where the word left, for instance, is
-# directly followed by valid classname characters and a curly brace.
-# ex: .column-left {float: left} will become .column-left {float: right}
-LOOKAHEAD_NOT_OPEN_BRACE = (r'(?!(?:%s|%s|%s|#|\:|\.|\,|\+|>)*?{)' %
- (csslex.NMCHAR, TOKEN_LINES, csslex.SPACE))
-
-
-# These two lookaheads are to test whether or not we are within a
-# background: url(HERE) situation.
-# Ref: http://www.w3.org/TR/CSS21/syndata.html#uri
-VALID_AFTER_URI_CHARS = r'[\'\"]?%s' % csslex.WHITESPACE
-LOOKAHEAD_NOT_CLOSING_PAREN = r'(?!%s?%s\))' % (csslex.URL_CHARS,
- VALID_AFTER_URI_CHARS)
-LOOKAHEAD_FOR_CLOSING_PAREN = r'(?=%s?%s\))' % (csslex.URL_CHARS,
- VALID_AFTER_URI_CHARS)
-
-# Compile a regex to swap left and right values in 4 part notations.
-# We need to match negatives and decimal numeric values.
-# ex. 'margin: .25em -2px 3px 0' becomes 'margin: .25em 0 3px -2px'.
-POSSIBLY_NEGATIVE_QUANTITY = r'((?:-?%s)|(?:inherit|auto))' % csslex.QUANTITY
-POSSIBLY_NEGATIVE_QUANTITY_SPACE = r'%s%s%s' % (POSSIBLY_NEGATIVE_QUANTITY,
- csslex.SPACE,
- csslex.WHITESPACE)
-FOUR_NOTATION_QUANTITY_RE = re.compile(r'%s%s%s%s' %
- (POSSIBLY_NEGATIVE_QUANTITY_SPACE,
- POSSIBLY_NEGATIVE_QUANTITY_SPACE,
- POSSIBLY_NEGATIVE_QUANTITY_SPACE,
- POSSIBLY_NEGATIVE_QUANTITY),
- re.I)
-COLOR = r'(%s|%s)' % (csslex.NAME, csslex.HASH)
-COLOR_SPACE = r'%s%s' % (COLOR, csslex.SPACE)
-FOUR_NOTATION_COLOR_RE = re.compile(r'(-color%s:%s)%s%s%s(%s)' %
- (csslex.WHITESPACE,
- csslex.WHITESPACE,
- COLOR_SPACE,
- COLOR_SPACE,
- COLOR_SPACE,
- COLOR),
- re.I)
-
-# Compile the cursor resize regexes
-CURSOR_EAST_RE = re.compile(LOOKBEHIND_NOT_LETTER + '([ns]?)e-resize')
-CURSOR_WEST_RE = re.compile(LOOKBEHIND_NOT_LETTER + '([ns]?)w-resize')
-
-# Matches the condition where we need to replace the horizontal component
-# of a background-position value when expressed in horizontal percentage.
-# Had to make two regexes because in the case of position-x there is only
-# one quantity, and otherwise we don't want to match and change cases with only
-# one quantity.
-BG_HORIZONTAL_PERCENTAGE_RE = re.compile(r'background(-position)?(%s:%s)'
- '([^%%]*?)(%s)%%'
- '(%s(?:%s|%s))' % (csslex.WHITESPACE,
- csslex.WHITESPACE,
- csslex.NUM,
- csslex.WHITESPACE,
- csslex.QUANTITY,
- csslex.IDENT))
-
-BG_HORIZONTAL_PERCENTAGE_X_RE = re.compile(r'background-position-x(%s:%s)'
- '(%s)%%' % (csslex.WHITESPACE,
- csslex.WHITESPACE,
- csslex.NUM))
-
-# Matches the opening of a body selector.
-BODY_SELECTOR = r'body%s{%s' % (csslex.WHITESPACE, csslex.WHITESPACE)
-
-# Matches anything up until the closing of a selector.
-CHARS_WITHIN_SELECTOR = r'[^\}]*?'
-
-# Matches the direction property in a selector.
-DIRECTION_RE = r'direction%s:%s' % (csslex.WHITESPACE, csslex.WHITESPACE)
-
-# These allow us to swap "ltr" with "rtl" and vice versa ONLY within the
-# body selector and on the same line.
-BODY_DIRECTION_LTR_RE = re.compile(r'(%s)(%s)(%s)(ltr)' %
- (BODY_SELECTOR, CHARS_WITHIN_SELECTOR,
- DIRECTION_RE),
- re.I)
-BODY_DIRECTION_RTL_RE = re.compile(r'(%s)(%s)(%s)(rtl)' %
- (BODY_SELECTOR, CHARS_WITHIN_SELECTOR,
- DIRECTION_RE),
- re.I)
-
-
-# Allows us to swap "direction:ltr" with "direction:rtl" and
-# vice versa anywhere in a line.
-DIRECTION_LTR_RE = re.compile(r'%s(ltr)' % DIRECTION_RE)
-DIRECTION_RTL_RE = re.compile(r'%s(rtl)' % DIRECTION_RE)
-
-# We want to be able to switch left with right and vice versa anywhere
-# we encounter left/right strings, EXCEPT inside the background:url(). The next
-# two regexes are for that purpose. We have alternate IN_URL versions of the
-# regexes compiled in case the user passes the flag that they do
-# actually want to have left and right swapped inside of background:urls.
-LEFT_RE = re.compile('%s(%s)%s%s' % (LOOKBEHIND_NOT_LETTER,
- LEFT,
- LOOKAHEAD_NOT_CLOSING_PAREN,
- LOOKAHEAD_NOT_OPEN_BRACE),
- re.I)
-RIGHT_RE = re.compile('%s(%s)%s%s' % (LOOKBEHIND_NOT_LETTER,
- RIGHT,
- LOOKAHEAD_NOT_CLOSING_PAREN,
- LOOKAHEAD_NOT_OPEN_BRACE),
- re.I)
-LEFT_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
- LEFT,
- LOOKAHEAD_FOR_CLOSING_PAREN),
- re.I)
-RIGHT_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
- RIGHT,
- LOOKAHEAD_FOR_CLOSING_PAREN),
- re.I)
-LTR_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
- LTR,
- LOOKAHEAD_FOR_CLOSING_PAREN),
- re.I)
-RTL_IN_URL_RE = re.compile('%s(%s)%s' % (LOOKBEHIND_NOT_LETTER,
- RTL,
- LOOKAHEAD_FOR_CLOSING_PAREN),
- re.I)
-
-COMMENT_RE = re.compile('(%s)' % csslex.COMMENT, re.I)
-
-NOFLIP_TOKEN = r'\@noflip'
-# The NOFLIP_TOKEN inside of a comment. For now, this requires that comments
-# be in the input, which means users of a css compiler would have to run
-# this script first if they want this functionality.
-NOFLIP_ANNOTATION = r'/\*%s%s%s\*/' % (csslex.WHITESPACE,
- NOFLIP_TOKEN,
- csslex. WHITESPACE)
-
-# After a NOFLIP_ANNOTATION, and within a class selector, we want to be able
-# to set aside a single rule not to be flipped. We can do this by matching
-# our NOFLIP annotation and then using a lookahead to make sure there is not
-# an opening brace before the match.
-NOFLIP_SINGLE_RE = re.compile(r'(%s%s[^;}]+;?)' % (NOFLIP_ANNOTATION,
- LOOKAHEAD_NOT_OPEN_BRACE),
- re.I)
-
-# After a NOFLIP_ANNOTATION, we want to grab anything up until the next } which
-# means the entire following class block. This will prevent all of its
-# declarations from being flipped.
-NOFLIP_CLASS_RE = re.compile(r'(%s%s})' % (NOFLIP_ANNOTATION,
- CHARS_WITHIN_SELECTOR),
- re.I)
-
-
-class Tokenizer:
- """Replaces any CSS comments with string tokens and vice versa."""
-
- def __init__(self, token_re, token_string):
- """Constructor for the Tokenizer.
-
- Args:
- token_re: A regex for the string to be replace by a token.
- token_string: The string to put between token delimiters when tokenizing.
- """
- logging.debug('Tokenizer::init token_string=%s' % token_string)
- self.token_re = token_re
- self.token_string = token_string
- self.originals = []
-
- def Tokenize(self, line):
- """Replaces any string matching token_re in line with string tokens.
-
- By passing a function as an argument to the re.sub line below, we bypass
- the usual rule where re.sub will only replace the left-most occurrence of
- a match by calling the passed in function for each occurrence.
-
- Args:
- line: A line to replace token_re matches in.
-
- Returns:
- line: A line with token_re matches tokenized.
- """
- line = self.token_re.sub(self.TokenizeMatches, line)
- logging.debug('Tokenizer::Tokenize returns: %s' % line)
- return line
-
- def DeTokenize(self, line):
- """Replaces tokens with the original string.
-
- Args:
- line: A line with tokens.
-
- Returns:
- line with any tokens replaced by the original string.
- """
-
- # Put all of the comments back in by their comment token.
- for i, original in enumerate(self.originals):
- token = '%s%s_%s%s' % (TOKEN_DELIMITER, self.token_string, i + 1,
- TOKEN_DELIMITER)
- line = line.replace(token, original)
- logging.debug('Tokenizer::DeTokenize i:%s w/%s' % (i, token))
- logging.debug('Tokenizer::DeTokenize returns: %s' % line)
- return line
-
- def TokenizeMatches(self, m):
- """Replaces matches with tokens and stores the originals.
-
- Args:
- m: A match object.
-
- Returns:
- A string token which replaces the CSS comment.
- """
- logging.debug('Tokenizer::TokenizeMatches %s' % m.group(1))
- self.originals.append(m.group(1))
- return '%s%s_%s%s' % (TOKEN_DELIMITER,
- self.token_string,
- len(self.originals),
- TOKEN_DELIMITER)
-
-
-def FixBodyDirectionLtrAndRtl(line):
- """Replaces ltr with rtl and vice versa ONLY in the body direction.
-
- Args:
- line: A string to replace instances of ltr with rtl.
- Returns:
- line with direction: ltr and direction: rtl swapped only in body selector.
- line = FixBodyDirectionLtrAndRtl('body { direction:ltr }')
- line will now be 'body { direction:rtl }'.
- """
-
- line = BODY_DIRECTION_LTR_RE.sub('\\1\\2\\3%s' % TMP_TOKEN, line)
- line = BODY_DIRECTION_RTL_RE.sub('\\1\\2\\3%s' % LTR, line)
- line = line.replace(TMP_TOKEN, RTL)
- logging.debug('FixBodyDirectionLtrAndRtl returns: %s' % line)
- return line
-
-
-def FixLeftAndRight(line):
- """Replaces left with right and vice versa in line.
-
- Args:
- line: A string in which to perform the replacement.
-
- Returns:
- line with left and right swapped. For example:
- line = FixLeftAndRight('padding-left: 2px; margin-right: 1px;')
- line will now be 'padding-right: 2px; margin-left: 1px;'.
- """
-
- line = LEFT_RE.sub(TMP_TOKEN, line)
- line = RIGHT_RE.sub(LEFT, line)
- line = line.replace(TMP_TOKEN, RIGHT)
- logging.debug('FixLeftAndRight returns: %s' % line)
- return line
-
-
-def FixLeftAndRightInUrl(line):
- """Replaces left with right and vice versa ONLY within background urls.
-
- Args:
- line: A string in which to replace left with right and vice versa.
-
- Returns:
- line with left and right swapped in the url string. For example:
- line = FixLeftAndRightInUrl('background:url(right.png)')
- line will now be 'background:url(left.png)'.
- """
-
- line = LEFT_IN_URL_RE.sub(TMP_TOKEN, line)
- line = RIGHT_IN_URL_RE.sub(LEFT, line)
- line = line.replace(TMP_TOKEN, RIGHT)
- logging.debug('FixLeftAndRightInUrl returns: %s' % line)
- return line
-
-
-def FixLtrAndRtlInUrl(line):
- """Replaces ltr with rtl and vice versa ONLY within background urls.
-
- Args:
- line: A string in which to replace ltr with rtl and vice versa.
-
- Returns:
- line with left and right swapped. For example:
- line = FixLtrAndRtlInUrl('background:url(rtl.png)')
- line will now be 'background:url(ltr.png)'.
- """
-
- line = LTR_IN_URL_RE.sub(TMP_TOKEN, line)
- line = RTL_IN_URL_RE.sub(LTR, line)
- line = line.replace(TMP_TOKEN, RTL)
- logging.debug('FixLtrAndRtlInUrl returns: %s' % line)
- return line
-
-
-def FixCursorProperties(line):
- """Fixes directional CSS cursor properties.
-
- Args:
- line: A string to fix CSS cursor properties in.
-
- Returns:
- line reformatted with the cursor properties substituted. For example:
- line = FixCursorProperties('cursor: ne-resize')
- line will now be 'cursor: nw-resize'.
- """
-
- line = CURSOR_EAST_RE.sub('\\1' + TMP_TOKEN, line)
- line = CURSOR_WEST_RE.sub('\\1e-resize', line)
- line = line.replace(TMP_TOKEN, 'w-resize')
- logging.debug('FixCursorProperties returns: %s' % line)
- return line
-
-
-def FixFourPartNotation(line):
- """Fixes the second and fourth positions in 4 part CSS notation.
-
- Args:
- line: A string to fix 4 part CSS notation in.
-
- Returns:
- line reformatted with the 4 part notations swapped. For example:
- line = FixFourPartNotation('padding: 1px 2px 3px 4px')
- line will now be 'padding: 1px 4px 3px 2px'.
- """
- line = FOUR_NOTATION_QUANTITY_RE.sub('\\1 \\4 \\3 \\2', line)
- line = FOUR_NOTATION_COLOR_RE.sub('\\1\\2 \\5 \\4 \\3', line)
- logging.debug('FixFourPartNotation returns: %s' % line)
- return line
-
-
-def FixBackgroundPosition(line):
- """Fixes horizontal background percentage values in line.
-
- Args:
- line: A string to fix horizontal background position values in.
-
- Returns:
- line reformatted with the 4 part notations swapped.
- """
- line = BG_HORIZONTAL_PERCENTAGE_RE.sub(CalculateNewBackgroundPosition, line)
- line = BG_HORIZONTAL_PERCENTAGE_X_RE.sub(CalculateNewBackgroundPositionX,
- line)
- logging.debug('FixBackgroundPosition returns: %s' % line)
- return line
-
-
-def CalculateNewBackgroundPosition(m):
- """Fixes horizontal background-position percentages.
-
- This function should be used as an argument to re.sub since it needs to
- perform replacement specific calculations.
-
- Args:
- m: A match object.
-
- Returns:
- A string with the horizontal background position percentage fixed.
- BG_HORIZONTAL_PERCENTAGE_RE.sub(FixBackgroundPosition,
- 'background-position: 75% 50%')
- will return 'background-position: 25% 50%'.
- """
-
- # The flipped value is the offset from 100%
- new_x = str(100-int(m.group(4)))
-
- # Since m.group(1) may very well be None type and we need a string..
- if m.group(1):
- position_string = m.group(1)
- else:
- position_string = ''
-
- return 'background%s%s%s%s%%%s' % (position_string, m.group(2), m.group(3),
- new_x, m.group(5))
-
-
-def CalculateNewBackgroundPositionX(m):
- """Fixes percent based background-position-x.
-
- This function should be used as an argument to re.sub since it needs to
- perform replacement specific calculations.
-
- Args:
- m: A match object.
-
- Returns:
- A string with the background-position-x percentage fixed.
- BG_HORIZONTAL_PERCENTAGE_X_RE.sub(CalculateNewBackgroundPosition,
- 'background-position-x: 75%')
- will return 'background-position-x: 25%'.
- """
-
- # The flipped value is the offset from 100%
- new_x = str(100-int(m.group(2)))
-
- return 'background-position-x%s%s%%' % (m.group(1), new_x)
-
-
-def ChangeLeftToRightToLeft(lines,
- swap_ltr_rtl_in_url=None,
- swap_left_right_in_url=None):
- """Turns lines into a stream and runs the fixing functions against it.
-
- Args:
- lines: An list of CSS lines.
- swap_ltr_rtl_in_url: Overrides this flag if param is set.
- swap_left_right_in_url: Overrides this flag if param is set.
-
- Returns:
- The same lines, but with left and right fixes.
- """
-
- global FLAGS
-
- # Possibly override flags with params.
- logging.debug('ChangeLeftToRightToLeft swap_ltr_rtl_in_url=%s, '
- 'swap_left_right_in_url=%s' % (swap_ltr_rtl_in_url,
- swap_left_right_in_url))
- if swap_ltr_rtl_in_url is None:
- swap_ltr_rtl_in_url = FLAGS['swap_ltr_rtl_in_url']
- if swap_left_right_in_url is None:
- swap_left_right_in_url = FLAGS['swap_left_right_in_url']
-
- # Turns the array of lines into a single line stream.
- logging.debug('LINES COUNT: %s' % len(lines))
- line = TOKEN_LINES.join(lines)
-
- # Tokenize any single line rules with the /* noflip */ annotation.
- noflip_single_tokenizer = Tokenizer(NOFLIP_SINGLE_RE, 'NOFLIP_SINGLE')
- line = noflip_single_tokenizer.Tokenize(line)
-
- # Tokenize any class rules with the /* noflip */ annotation.
- noflip_class_tokenizer = Tokenizer(NOFLIP_CLASS_RE, 'NOFLIP_CLASS')
- line = noflip_class_tokenizer.Tokenize(line)
-
- # Tokenize the comments so we can preserve them through the changes.
- comment_tokenizer = Tokenizer(COMMENT_RE, 'C')
- line = comment_tokenizer.Tokenize(line)
-
- # Here starteth the various left/right orientation fixes.
- line = FixBodyDirectionLtrAndRtl(line)
-
- if swap_left_right_in_url:
- line = FixLeftAndRightInUrl(line)
-
- if swap_ltr_rtl_in_url:
- line = FixLtrAndRtlInUrl(line)
-
- line = FixLeftAndRight(line)
- line = FixCursorProperties(line)
- line = FixFourPartNotation(line)
- line = FixBackgroundPosition(line)
-
- # DeTokenize the single line noflips.
- line = noflip_single_tokenizer.DeTokenize(line)
-
- # DeTokenize the class-level noflips.
- line = noflip_class_tokenizer.DeTokenize(line)
-
- # DeTokenize the comments.
- line = comment_tokenizer.DeTokenize(line)
-
- # Rejoin the lines back together.
- lines = line.split(TOKEN_LINES)
-
- return lines
-
-def usage():
- """Prints out usage information."""
-
- print 'Usage:'
- print ' ./cssjanus.py < file.css > file-rtl.css'
- print 'Flags:'
- print ' --swap_left_right_in_url: Fixes "left"/"right" string within urls.'
- print ' Ex: ./cssjanus.py --swap_left_right_in_url < file.css > file_rtl.css'
- print ' --swap_ltr_rtl_in_url: Fixes "ltr"/"rtl" string within urls.'
- print ' Ex: ./cssjanus --swap_ltr_rtl_in_url < file.css > file_rtl.css'
-
-def setflags(opts):
- """Parse the passed in command line arguments and set the FLAGS global.
-
- Args:
- opts: getopt iterable intercepted from argv.
- """
-
- global FLAGS
-
- # Parse the arguments.
- for opt, arg in opts:
- logging.debug('opt: %s, arg: %s' % (opt, arg))
- if opt in ("-h", "--help"):
- usage()
- sys.exit()
- elif opt in ("-d", "--debug"):
- logging.getLogger().setLevel(logging.DEBUG)
- elif opt == '--swap_ltr_rtl_in_url':
- FLAGS['swap_ltr_rtl_in_url'] = True
- elif opt == '--swap_left_right_in_url':
- FLAGS['swap_left_right_in_url'] = True
-
-
-def main(argv):
- """Sends stdin lines to ChangeLeftToRightToLeft and writes to stdout."""
-
- # Define the flags.
- try:
- opts, args = getopt.getopt(argv, 'hd', ['help', 'debug',
- 'swap_left_right_in_url',
- 'swap_ltr_rtl_in_url'])
- except getopt.GetoptError:
- usage()
- sys.exit(2)
-
- # Parse and set the flags.
- setflags(opts)
-
- # Call the main routine with all our functionality.
- fixed_lines = ChangeLeftToRightToLeft(sys.stdin.readlines())
- sys.stdout.write(''.join(fixed_lines))
-
-if __name__ == '__main__':
- main(sys.argv[1:])
+++ /dev/null
-#!/usr/bin/python
-#
-# Copyright 2007 Google Inc. All Rights Reserved.
-
-"""CSS Lexical Grammar rules.
-
-CSS lexical grammar from http://www.w3.org/TR/CSS21/grammar.html
-"""
-
-__author__ = ['elsigh@google.com (Lindsey Simon)',
- 'msamuel@google.com (Mike Samuel)']
-
-# public symbols
-__all__ = [ "NEWLINE", "HEX", "NON_ASCII", "UNICODE", "ESCAPE", "NMSTART", "NMCHAR", "STRING1", "STRING2", "IDENT", "NAME", "HASH", "NUM", "STRING", "URL", "SPACE", "WHITESPACE", "COMMENT", "QUANTITY", "PUNC" ]
-
-# The comments below are mostly copied verbatim from the grammar.
-
-# "@import" {return IMPORT_SYM;}
-# "@page" {return PAGE_SYM;}
-# "@media" {return MEDIA_SYM;}
-# "@charset" {return CHARSET_SYM;}
-KEYWORD = r'(?:\@(?:import|page|media|charset))'
-
-# nl \n|\r\n|\r|\f ; a newline
-NEWLINE = r'\n|\r\n|\r|\f'
-
-# h [0-9a-f] ; a hexadecimal digit
-HEX = r'[0-9a-f]'
-
-# nonascii [\200-\377]
-NON_ASCII = r'[\200-\377]'
-
-# unicode \\{h}{1,6}(\r\n|[ \t\r\n\f])?
-UNICODE = r'(?:(?:\\' + HEX + r'{1,6})(?:\r\n|[ \t\r\n\f])?)'
-
-# escape {unicode}|\\[^\r\n\f0-9a-f]
-ESCAPE = r'(?:' + UNICODE + r'|\\[^\r\n\f0-9a-f])'
-
-# nmstart [_a-z]|{nonascii}|{escape}
-NMSTART = r'(?:[_a-z]|' + NON_ASCII + r'|' + ESCAPE + r')'
-
-# nmchar [_a-z0-9-]|{nonascii}|{escape}
-NMCHAR = r'(?:[_a-z0-9-]|' + NON_ASCII + r'|' + ESCAPE + r')'
-
-# ident -?{nmstart}{nmchar}*
-IDENT = r'-?' + NMSTART + NMCHAR + '*'
-
-# name {nmchar}+
-NAME = NMCHAR + r'+'
-
-# hash
-HASH = r'#' + NAME
-
-# string1 \"([^\n\r\f\\"]|\\{nl}|{escape})*\" ; "string"
-STRING1 = r'"(?:[^\"\\]|\\.)*"'
-
-# string2 \'([^\n\r\f\\']|\\{nl}|{escape})*\' ; 'string'
-STRING2 = r"'(?:[^\'\\]|\\.)*'"
-
-# string {string1}|{string2}
-STRING = '(?:' + STRING1 + r'|' + STRING2 + ')'
-
-# num [0-9]+|[0-9]*"."[0-9]+
-NUM = r'(?:[0-9]*\.[0-9]+|[0-9]+)'
-
-# s [ \t\r\n\f]
-SPACE = r'[ \t\r\n\f]'
-
-# w {s}*
-WHITESPACE = '(?:' + SPACE + r'*)'
-
-# url special chars
-URL_SPECIAL_CHARS = r'[!#$%&*-~]'
-
-# url chars ({url_special_chars}|{nonascii}|{escape})*
-URL_CHARS = r'(?:%s|%s|%s)*' % (URL_SPECIAL_CHARS, NON_ASCII, ESCAPE)
-
-# url
-URL = r'url\(%s(%s|%s)%s\)' % (WHITESPACE, STRING, URL_CHARS, WHITESPACE)
-
-# comments
-# see http://www.w3.org/TR/CSS21/grammar.html
-COMMENT = r'/\*[^*]*\*+([^/*][^*]*\*+)*/'
-
-# {E}{M} {return EMS;}
-# {E}{X} {return EXS;}
-# {P}{X} {return LENGTH;}
-# {C}{M} {return LENGTH;}
-# {M}{M} {return LENGTH;}
-# {I}{N} {return LENGTH;}
-# {P}{T} {return LENGTH;}
-# {P}{C} {return LENGTH;}
-# {D}{E}{G} {return ANGLE;}
-# {R}{A}{D} {return ANGLE;}
-# {G}{R}{A}{D} {return ANGLE;}
-# {M}{S} {return TIME;}
-# {S} {return TIME;}
-# {H}{Z} {return FREQ;}
-# {K}{H}{Z} {return FREQ;}
-# % {return PERCENTAGE;}
-UNIT = r'(?:em|ex|px|cm|mm|in|pt|pc|deg|rad|grad|ms|s|hz|khz|%)'
-
-# {num}{UNIT|IDENT} {return NUMBER;}
-QUANTITY = '%s(?:%s%s|%s)?' % (NUM, WHITESPACE, UNIT, IDENT)
-
-# "<!--" {return CDO;}
-# "-->" {return CDC;}
-# "~=" {return INCLUDES;}
-# "|=" {return DASHMATCH;}
-# {w}"{" {return LBRACE;}
-# {w}"+" {return PLUS;}
-# {w}">" {return GREATER;}
-# {w}"," {return COMMA;}
-PUNC = r'<!--|-->|~=|\|=|[\{\+>,:;]'
dépôts / lhc / web / wiklou.git / commitdiff