diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/string/interpolation.rb')
-rw-r--r-- | activesupport/lib/active_support/core_ext/string/interpolation.rb | 92 |
1 files changed, 1 insertions, 91 deletions
diff --git a/activesupport/lib/active_support/core_ext/string/interpolation.rb b/activesupport/lib/active_support/core_ext/string/interpolation.rb index 06d3505c60..932117cc10 100644 --- a/activesupport/lib/active_support/core_ext/string/interpolation.rb +++ b/activesupport/lib/active_support/core_ext/string/interpolation.rb @@ -1,91 +1 @@ -=begin - heavily based on Masao Mutoh's gettext String interpolation extension - http://github.com/mutoh/gettext/blob/f6566738b981fe0952548c421042ad1e0cdfb31e/lib/gettext/core_ext/string.rb - Copyright (C) 2005-2010 Masao Mutoh - You may redistribute it and/or modify it under the same license terms as Ruby. -=end - -if RUBY_VERSION < '1.9' && !"".respond_to?(:interpolate_without_ruby_19_syntax) - - # KeyError is raised by String#% when the string contains a named placeholder - # that is not contained in the given arguments hash. Ruby 1.9 includes and - # raises this exception natively. We define it to mimic Ruby 1.9's behaviour - # in Ruby 1.8.x - - class KeyError < IndexError - def initialize(message = nil) - super(message || "key not found") - end - end unless defined?(KeyError) - - # Extension for String class. This feature is included in Ruby 1.9 or later but not occur TypeError. - # - # String#% method which accept "named argument". The translator can know - # the meaning of the msgids using "named argument" instead of %s/%d style. - - class String - alias :interpolate_without_ruby_19_syntax :% # :nodoc: - - INTERPOLATION_PATTERN = Regexp.union( - /%%/, - /%\{(\w+)\}/, # matches placeholders like "%{foo}" - /%<(\w+)>(.*?\d*\.?\d*[bBdiouxXeEfgGcps])/ # matches placeholders like "%<foo>.d" - ) - - # % uses self (i.e. the String) as a format specification and returns the - # result of applying it to the given arguments. In other words it interpolates - # the given arguments to the string according to the formats the string - # defines. - # - # There are three ways to use it: - # - # * Using a single argument or Array of arguments. - # - # This is the default behaviour of the String class. See Kernel#sprintf for - # more details about the format string. - # - # Example: - # - # "%d %s" % [1, "message"] - # # => "1 message" - # - # * Using a Hash as an argument and unformatted, named placeholders. - # - # When you pass a Hash as an argument and specify placeholders with %{foo} - # it will interpret the hash values as named arguments. - # - # Example: - # - # "%{firstname}, %{lastname}" % {:firstname => "Masao", :lastname => "Mutoh"} - # # => "Masao Mutoh" - # - # * Using a Hash as an argument and formatted, named placeholders. - # - # When you pass a Hash as an argument and specify placeholders with %<foo>d - # it will interpret the hash values as named arguments and format the value - # according to the formatting instruction appended to the closing >. - # - # Example: - # - # "%<integer>d, %<float>.1f" % { :integer => 10, :float => 43.4 } - # # => "10, 43.3" - def %(args) - if args.kind_of?(Hash) - dup.gsub(INTERPOLATION_PATTERN) do |match| - if match == '%%' - '%' - else - key = ($1 || $2).to_sym - raise KeyError unless args.has_key?(key) - $3 ? sprintf("%#{$3}", args[key]) : args[key] - end - end - elsif self =~ INTERPOLATION_PATTERN - raise ArgumentError.new('one hash required') - else - result = gsub(/%([{<])/, '%%\1') - result.send :'interpolate_without_ruby_19_syntax', args - end - end - end -end +require 'i18n/core_ext/string/interpolate' |