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module Twine
module Placeholders
extend self
# Note: the ` ` (single space) flag is NOT supported
PLACEHOLDER_FLAGS_WIDTH_PRECISION_LENGTH = '([-+0#])?(\d+|\*)?(\.(\d+|\*))?(hh?|ll?|L|z|j|t|q)?'
PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH = '(\d+\$)?' + PLACEHOLDER_FLAGS_WIDTH_PRECISION_LENGTH
PLACEHOLDER_TYPES = '[diufFeEgGxXoscpaA]'
PLACEHOLDER_REGEX = /%#{PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH}#{PLACEHOLDER_TYPES}/
def number_of_twine_placeholders(input)
input.scan(PLACEHOLDER_REGEX).size
end
def convert_twine_string_placeholder(input)
# %@ -> %s
input.gsub(/(%#{PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH})@/, '\1s')
end
# http://developer.android.com/guide/topics/resources/string-resource.html#FormattingAndStyling
# http://stackoverflow.com/questions/4414389/android-xml-percent-symbol
# https://github.com/mobiata/twine/pull/106
def convert_placeholders_from_twine_to_android(input)
# %@ -> %s
value = convert_twine_string_placeholder(input)
number_of_placeholders = number_of_twine_placeholders(input)
return value if number_of_placeholders == 0
# got placeholders -> need to double single percent signs
# % -> %% (but %% -> %%, %d -> %d)
placeholder_syntax = PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH + PLACEHOLDER_TYPES
single_percent_regex = /([^%])(%)(?!(%|#{placeholder_syntax}))/
value.gsub! single_percent_regex, '\1%%'
return value if number_of_placeholders < 2
# number placeholders
non_numbered_placeholder_regex = /%(#{PLACEHOLDER_FLAGS_WIDTH_PRECISION_LENGTH}#{PLACEHOLDER_TYPES})/
number_of_non_numbered_placeholders = value.scan(non_numbered_placeholder_regex).size
return value if number_of_non_numbered_placeholders == 0
raise Twine::Error.new("The value \"#{input}\" contains numbered and non-numbered placeholders") if number_of_placeholders != number_of_non_numbered_placeholders
# %d -> %$1d
index = 0
value.gsub!(non_numbered_placeholder_regex) { "%#{index += 1}$#{$1}" }
value
end
def convert_placeholders_from_android_to_twine(input)
placeholder_regex = /(%#{PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH})s/
# %s -> %@
input.gsub(placeholder_regex, '\1@')
end
# http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/resources/IResourceManager.html#getString()
# http://soenkerohde.com/2008/07/flex-localization/comment-page-1/
def convert_placeholders_from_twine_to_flash(input)
value = convert_twine_string_placeholder(input)
value.gsub(PLACEHOLDER_REGEX).each_with_index do |match, index|
"{#{index}}"
end
end
def convert_placeholders_from_flash_to_twine(input)
input.gsub /\{\d+\}/, '%@'
end
end
end
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