Redmine/vendor/plugins/gloc-1.1.0/lib/gloc-rails.rb

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# Copyright (c) 2005-2006 David Barri
require 'gloc'
module ActionController #:nodoc:
class Base #:nodoc:
include GLoc
end
module Filters #:nodoc:
module ClassMethods
# This filter attempts to auto-detect the clients desired language.
# It first checks the params, then a cookie and then the HTTP_ACCEPT_LANGUAGE
# request header. If a language is found to match or be similar to a currently
# valid language, then it sets the current_language of the controller.
#
# class ExampleController < ApplicationController
# set_language :en
# autodetect_language_filter :except => 'monkey', :on_no_lang => :lang_not_autodetected_callback
# autodetect_language_filter :only => 'monkey', :check_cookie => 'monkey_lang', :check_accept_header => false
# ...
# def lang_not_autodetected_callback
# redirect_to somewhere
# end
# end
#
# The <tt>args</tt> for this filter are exactly the same the arguments of
# <tt>before_filter</tt> with the following exceptions:
# * <tt>:check_params</tt> -- If false, then params will not be checked for a language.
# If a String, then this will value will be used as the name of the param.
# * <tt>:check_cookie</tt> -- If false, then the cookie will not be checked for a language.
# If a String, then this will value will be used as the name of the cookie.
# * <tt>:check_accept_header</tt> -- If false, then HTTP_ACCEPT_LANGUAGE will not be checked for a language.
# * <tt>:on_set_lang</tt> -- You can specify the name of a callback function to be called when the language
# is successfully detected and set. The param must be a Symbol or a String which is the name of the function.
# The callback function must accept one argument (the language) and must be instance level.
# * <tt>:on_no_lang</tt> -- You can specify the name of a callback function to be called when the language
# couldn't be detected automatically. The param must be a Symbol or a String which is the name of the function.
# The callback function must be instance level.
#
# You override the default names of the param or cookie by calling <tt>GLoc.set_config :default_param_name => 'new_param_name'</tt>
# and <tt>GLoc.set_config :default_cookie_name => 'new_cookie_name'</tt>.
def autodetect_language_filter(*args)
options= args.last.is_a?(Hash) ? args.last : {}
x= 'Proc.new { |c| l= nil;'
# :check_params
unless (v= options.delete(:check_params)) == false
name= v ? ":#{v}" : 'GLoc.get_config(:default_param_name)'
x << "l ||= GLoc.similar_language(c.params[#{name}]);"
end
# :check_cookie
unless (v= options.delete(:check_cookie)) == false
name= v ? ":#{v}" : 'GLoc.get_config(:default_cookie_name)'
x << "l ||= GLoc.similar_language(c.send(:cookies)[#{name}]);"
end
# :check_accept_header
unless options.delete(:check_accept_header) == false
x << %<
unless l
a= c.request.env['HTTP_ACCEPT_LANGUAGE'].split(/,|;/) rescue nil
a.each {|x| l ||= GLoc.similar_language(x)} if a
end; >
end
# Set language
x << 'ret= true;'
x << 'if l; c.set_language(l); c.headers[\'Content-Language\']= l.to_s; '
if options.has_key?(:on_set_lang)
x << "ret= c.#{options.delete(:on_set_lang)}(l);"
end
if options.has_key?(:on_no_lang)
x << "else; ret= c.#{options.delete(:on_no_lang)};"
end
x << 'end; ret }'
# Create filter
block= eval x
before_filter(*args, &block)
end
end
end
end
# ==============================================================================
module ActionMailer #:nodoc:
# In addition to including GLoc, <tt>render_message</tt> is also overridden so
# that mail templates contain the current language at the end of the file.
# Eg. <tt>deliver_hello</tt> will render <tt>hello_en.rhtml</tt>.
class Base
include GLoc
private
alias :render_message_without_gloc :render_message
def render_message(method_name, body)
render_message_without_gloc("#{method_name}_#{current_language}", body)
end
end
end
# ==============================================================================
module ActionView #:nodoc:
# <tt>initialize</tt> is overridden so that new instances of this class inherit
# the current language of the controller.
class Base
include GLoc
alias :initialize_without_gloc :initialize
def initialize(base_path = nil, assigns_for_first_render = {}, controller = nil)
initialize_without_gloc(base_path, assigns_for_first_render, controller)
set_language controller.current_language unless controller.nil?
end
end
module Helpers #:nodoc:
class InstanceTag
include GLoc
# Inherits the current language from the template object.
def current_language
@template_object.current_language
end
end
end
end
# ==============================================================================
module ActiveRecord #:nodoc:
class Base #:nodoc:
include GLoc
end
# class Errors
# include GLoc
# alias :add_without_gloc :add
# # The GLoc version of this method provides two extra features
# # * If <tt>msg</tt> is a string, it will be considered a GLoc string key.
# # * If <tt>msg</tt> is an array, the first element will be considered
# # the string and the remaining elements will be considered arguments for the
# # string. Eg. <tt>['Hi %s.','John']</tt>
# def add(attribute, msg= @@default_error_messages[:invalid])
# if msg.is_a?(Array)
# args= msg.clone
# msg= args.shift
# args= nil if args.empty?
# end
# msg= ltry(msg)
# msg= msg % args unless args.nil?
# add_without_gloc(attribute, msg)
# end
# # Inherits the current language from the base record.
# def current_language
# @base.current_language
# end
# end
module Validations #:nodoc:
module ClassMethods
# The default Rails version of this function creates an error message and then
# passes it to ActiveRecord.Errors.
# The GLoc version of this method, sends an array to ActiveRecord.Errors that will
# be turned into a string by ActiveRecord.Errors which in turn allows for the message
# of this validation function to be a GLoc string key.
def validates_length_of(*attrs)
# Merge given options with defaults.
options = {
:too_long => ActiveRecord::Errors.default_error_messages[:too_long],
:too_short => ActiveRecord::Errors.default_error_messages[:too_short],
:wrong_length => ActiveRecord::Errors.default_error_messages[:wrong_length]
}.merge(DEFAULT_VALIDATION_OPTIONS)
options.update(attrs.pop.symbolize_keys) if attrs.last.is_a?(Hash)
# Ensure that one and only one range option is specified.
range_options = ALL_RANGE_OPTIONS & options.keys
case range_options.size
when 0
raise ArgumentError, 'Range unspecified. Specify the :within, :maximum, :minimum, or :is option.'
when 1
# Valid number of options; do nothing.
else
raise ArgumentError, 'Too many range options specified. Choose only one.'
end
# Get range option and value.
option = range_options.first
option_value = options[range_options.first]
case option
when :within, :in
raise ArgumentError, ":#{option} must be a Range" unless option_value.is_a?(Range)
too_short = [options[:too_short] , option_value.begin]
too_long = [options[:too_long] , option_value.end ]
validates_each(attrs, options) do |record, attr, value|
if value.nil? or value.split(//).size < option_value.begin
record.errors.add(attr, too_short)
elsif value.split(//).size > option_value.end
record.errors.add(attr, too_long)
end
end
when :is, :minimum, :maximum
raise ArgumentError, ":#{option} must be a nonnegative Integer" unless option_value.is_a?(Integer) and option_value >= 0
# Declare different validations per option.
validity_checks = { :is => "==", :minimum => ">=", :maximum => "<=" }
message_options = { :is => :wrong_length, :minimum => :too_short, :maximum => :too_long }
message = [(options[:message] || options[message_options[option]]) , option_value]
validates_each(attrs, options) do |record, attr, value|
if value.kind_of?(String)
record.errors.add(attr, message) unless !value.nil? and value.split(//).size.method(validity_checks[option])[option_value]
else
record.errors.add(attr, message) unless !value.nil? and value.size.method(validity_checks[option])[option_value]
end
end
end
end
alias_method :validates_size_of, :validates_length_of
end
end
end
# ==============================================================================
module ApplicationHelper #:nodoc:
include GLoc
end