diff options
Diffstat (limited to 'actionpack/lib/action_view/helpers/tags/base.rb')
-rw-r--r-- | actionpack/lib/action_view/helpers/tags/base.rb | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/helpers/tags/base.rb b/actionpack/lib/action_view/helpers/tags/base.rb new file mode 100644 index 0000000000..e077cd5b3c --- /dev/null +++ b/actionpack/lib/action_view/helpers/tags/base.rb @@ -0,0 +1,150 @@ +module ActionView + module Helpers + module Tags + class Base #:nodoc: + include Helpers::ActiveModelInstanceTag, Helpers::TagHelper, Helpers::FormTagHelper + include FormOptionsHelper + + 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? + method_before_type_cast = @method_name + "_before_type_cast" + + object.respond_to?(method_before_type_cast) ? + object.send(method_before_type_cast) : + value(object) + 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) + if tag_value.nil? + add_default_name_and_id(options) + else + specified_id = options["id"] + add_default_name_and_id(options) + + if specified_id.blank? && options["id"].present? + options["id"] += "_#{sanitized_value(tag_value)}" + end + end + end + + def add_default_name_and_id(options) + if options.has_key?("index") + options["name"] ||= options.fetch("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"] ||= options.fetch("name"){ tag_name_with_index(@auto_index) } + options["id"] = options.fetch("id"){ tag_id_with_index(@auto_index) } + else + options["name"] ||= options.fetch("name"){ options['multiple'] ? tag_name_multiple : tag_name } + 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_multiple + "#{tag_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 sanitized_value(value) + value.to_s.gsub(/\s/, "_").gsub(/[^-\w]/, "").downcase + end + + def select_content_tag(option_tags, options, html_options) + html_options = html_options.stringify_keys + add_default_name_and_id(html_options) + options[:include_blank] ||= true unless options[:prompt] || select_not_required?(html_options) + select = content_tag("select", add_options(option_tags, options, value(object)), html_options) + + if html_options["multiple"] && options.fetch(:include_hidden, true) + tag("input", :disabled => html_options["disabled"], :name => html_options["name"], :type => "hidden", :value => "") + select + else + select + end + end + + def select_not_required?(html_options) + !html_options["required"] || html_options["multiple"] || html_options["size"].to_i > 1 + end + + def add_options(option_tags, options, value = nil) + if options[:include_blank] + option_tags = content_tag('option', options[:include_blank].kind_of?(String) ? options[:include_blank] : nil, :value => '') + "\n" + option_tags + end + if value.blank? && options[:prompt] + option_tags = content_tag('option', prompt_text(options[:prompt]), :value => '') + "\n" + option_tags + end + option_tags + end + end + end + end +end |