module Twine::Placeholders

Constants

PLACEHOLDER_FLAGS_WIDTH_PRECISION_LENGTH
PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH

Public Instance Methods

convert_placeholders_from_android_to_twine(input) click to toggle source
# File lib/twine/placeholders.rb, line 47
def convert_placeholders_from_android_to_twine(input)
  placeholder_regex = /(%#{PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH})s/

  # %s -> %@
  input.gsub(placeholder_regex, '\1@')
end
convert_placeholders_from_twine_to_android(input) click to toggle source

developer.android.com/guide/topics/resources/string-resource.html#FormattingAndStyling stackoverflow.com/questions/4414389/android-xml-percent-symbol github.com/mobiata/twine/pull/106

# File lib/twine/placeholders.rb, line 11
def convert_placeholders_from_twine_to_android(input)
  placeholder_types = '[diufFeEgGxXoscpaA]'

  # %@ -> %s
  value = input.gsub(/(%#{PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH})@/, '\1s')

  placeholder_syntax = PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH + placeholder_types
  placeholder_regex = /%#{placeholder_syntax}/

  number_of_placeholders = value.scan(placeholder_regex).size

  return value if number_of_placeholders == 0

  # got placeholders -> need to double single percent signs
  # % -> %% (but %% -> %%, %d -> %d)
  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