Module: Twine::Placeholders

Extended by:
Placeholders
Included in:
Formatters::Android, Formatters::Tizen, Placeholders
Defined in:
lib/twine/placeholders.rb

Constant Summary collapse

PLACEHOLDER_FLAGS_WIDTH_PRECISION_LENGTH = 
'([-+ 0#])?(\d+|\*)?(\.(\d+|\*))?(hh?|ll?|L|z|j|t)?'
PLACEHOLDER_PARAMETER_FLAGS_WIDTH_PRECISION_LENGTH = 
'(\d+\$)?' + PLACEHOLDER_FLAGS_WIDTH_PRECISION_LENGTH

Instance Method Summary collapse

Instance Method Details

#convert_placeholders_from_android_to_twine(input) ⇒ Object 



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# 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) ⇒ Object

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

Raises:



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# 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