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# frozen_string_literal: true
# heavily based on Masao Mutoh's gettext String interpolation extension
# http://github.com/mutoh/gettext/blob/f6566738b981fe0952548c421042ad1e0cdfb31e/lib/gettext/core_ext/string.rb
module I18n
DEFAULT_INTERPOLATION_PATTERNS = [
/%%/,
/%\{([\w|]+)\}/, # matches placeholders like "%{foo} or %{foo|word}"
/%<(\w+)>([^\d]*?\d*\.?\d*[bBdiouxXeEfgGcps])/ # matches placeholders like "%<foo>.d"
].freeze
INTERPOLATION_PATTERN = Regexp.union(DEFAULT_INTERPOLATION_PATTERNS)
deprecate_constant :INTERPOLATION_PATTERN
INTERPOLATION_PATTERNS_CACHE = Hash.new do |hash, patterns|
hash[patterns] = Regexp.union(patterns)
end
private_constant :INTERPOLATION_PATTERNS_CACHE
class << self
# Return String or raises MissingInterpolationArgument exception.
# Missing argument's logic is handled by I18n.config.missing_interpolation_argument_handler.
def interpolate(string, values)
raise ReservedInterpolationKey.new($1.to_sym, string) if string =~ I18n.reserved_keys_pattern
raise ArgumentError.new('Interpolation values must be a Hash.') unless values.kind_of?(Hash)
interpolate_hash(string, values)
end
def interpolate_hash(string, values)
pattern = INTERPOLATION_PATTERNS_CACHE[config.interpolation_patterns]
interpolated = false
interpolated_string = string.gsub(pattern) do |match|
interpolated = true
if match == '%%'
'%'
else
key = ($1 || $2 || match.tr("%{}", "")).to_sym
value = if values.key?(key)
values[key]
else
config.missing_interpolation_argument_handler.call(key, values, string)
end
value = value.call(values) if value.respond_to?(:call)
$3 ? sprintf("%#{$3}", value) : value
end
end
interpolated ? interpolated_string : string
end
end
end
Version data entries
21 entries across 21 versions & 9 rubygems