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module ActionView
module Helpers
module Tags
class Base #:nodoc:
include Helpers::ActiveModelInstanceTag, Helpers::TagHelper, Helpers::FormTagHelper
include FormOptionsHelper
DEFAULT_FIELD_OPTIONS = { "size" => 30 }
attr_reader :object
def initialize(object_name, method_name, template_object, options = {})
@object_name, @method_name = object_name.to_s.dup, method_name.to_s.dup
@template_object = template_object
@object_name.sub!(/\[\]$/,"") || @object_name.sub!(/\[\]\]$/,"]")
@object = retrieve_object(options.delete(:object))
@options = options
@auto_index = retrieve_autoindex(Regexp.last_match.pre_match) if Regexp.last_match
end
# This is what child classes implement.
def render
raise NotImplementedError, "Subclasses must implement a render method"
end
private
def value(object)
object.send @method_name if object
end
def value_before_type_cast(object)
unless object.nil?
object.respond_to?(@method_name + "_before_type_cast") ?
object.send(@method_name + "_before_type_cast") :
object.send(@method_name)
end
end
def retrieve_object(object)
if object
object
elsif @template_object.instance_variable_defined?("@#{@object_name}")
@template_object.instance_variable_get("@#{@object_name}")
end
rescue NameError
# As @object_name may contain the nested syntax (item[subobject]) we need to fallback to nil.
nil
end
def retrieve_autoindex(pre_match)
object = self.object || @template_object.instance_variable_get("@#{pre_match}")
if object && object.respond_to?(:to_param)
object.to_param
else
raise ArgumentError, "object[] naming but object param and @object var don't exist or don't respond to to_param: #{object.inspect}"
end
end
def add_default_name_and_id_for_value(tag_value, options)
unless tag_value.nil?
pretty_tag_value = tag_value.to_s.gsub(/\s/, "_").gsub(/[^-\w]/, "").downcase
specified_id = options["id"]
add_default_name_and_id(options)
options["id"] += "_#{pretty_tag_value}" if specified_id.blank? && options["id"].present?
else
add_default_name_and_id(options)
end
end
def add_default_name_and_id(options)
if options.has_key?("index")
options["name"] ||= tag_name_with_index(options["index"])
options["id"] = options.fetch("id"){ tag_id_with_index(options["index"]) }
options.delete("index")
elsif defined?(@auto_index)
options["name"] ||= tag_name_with_index(@auto_index)
options["id"] = options.fetch("id"){ tag_id_with_index(@auto_index) }
else
options["name"] ||= tag_name + (options['multiple'] ? '[]' : '')
options["id"] = options.fetch("id"){ tag_id }
end
options["id"] = [options.delete('namespace'), options["id"]].compact.join("_").presence
end
def tag_name
"#{@object_name}[#{sanitized_method_name}]"
end
def tag_name_with_index(index)
"#{@object_name}[#{index}][#{sanitized_method_name}]"
end
def tag_id
"#{sanitized_object_name}_#{sanitized_method_name}"
end
def tag_id_with_index(index)
"#{sanitized_object_name}_#{index}_#{sanitized_method_name}"
end
def sanitized_object_name
@sanitized_object_name ||= @object_name.gsub(/\]\[|[^-a-zA-Z0-9:.]/, "_").sub(/_$/, "")
end
def sanitized_method_name
@sanitized_method_name ||= @method_name.sub(/\?$/,"")
end
def select_content_tag(option_tags, options, html_options)
html_options = html_options.stringify_keys
add_default_name_and_id(html_options)
select = content_tag("select", add_options(option_tags, options, value(object)), html_options)
if html_options["multiple"]
tag("input", :disabled => html_options["disabled"], :name => html_options["name"], :type => "hidden", :value => "") + select
else
select
end
end
def add_options(option_tags, options, value = nil)
if options[:include_blank]
option_tags = "<option value=\"\">#{ERB::Util.html_escape(options[:include_blank]) if options[:include_blank].kind_of?(String)}</option>\n" + option_tags
end
if value.blank? && options[:prompt]
prompt = options[:prompt].kind_of?(String) ? options[:prompt] : I18n.translate('helpers.select.prompt', :default => 'Please select')
option_tags = "<option value=\"\">#{ERB::Util.html_escape(prompt)}</option>\n" + option_tags
end
option_tags.html_safe
end
end
end
end
end
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