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# 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
INTERPOLATION_PATTERN = Regexp.union(
/%%/,
/%\{(\w+)\}/, # matches placeholders like "%{foo}"
/%<(\w+)>(.*?\d*\.?\d*[bBdiouxXeEfgGcps])/ # matches placeholders like "%<foo>.d"
)
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 =~ 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)
string.gsub(INTERPOLATION_PATTERN) do |match|
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
end
end
end
Version data entries
73 entries across 61 versions & 12 rubygems