diff options
Diffstat (limited to 'actionpack/lib/action_view/renderer/partial_renderer.rb')
-rw-r--r-- | actionpack/lib/action_view/renderer/partial_renderer.rb | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/actionpack/lib/action_view/renderer/partial_renderer.rb b/actionpack/lib/action_view/renderer/partial_renderer.rb new file mode 100644 index 0000000000..eff425687b --- /dev/null +++ b/actionpack/lib/action_view/renderer/partial_renderer.rb @@ -0,0 +1,166 @@ +require 'action_view/renderer/abstract_renderer' + +module ActionView + class PartialRenderer < AbstractRenderer #:nodoc: + PARTIAL_NAMES = Hash.new {|h,k| h[k] = {} } + + def initialize(view) + super + @partial_names = PARTIAL_NAMES[@view.controller.class.name] + end + + def setup(options, block) + partial = options[:partial] + + @options = options + @locals = options[:locals] || {} + @block = block + + if String === partial + @object = options[:object] + @path = partial + @collection = collection + else + @object = partial + + if @collection = collection_from_object || collection + paths = @collection_data = @collection.map { |o| partial_path(o) } + @path = paths.uniq.size == 1 ? paths.first : nil + else + @path = partial_path + end + end + + if @path + @variable, @variable_counter = retrieve_variable(@path) + else + paths.map! { |path| retrieve_variable(path).unshift(path) } + end + + self + end + + def render + wrap_formats(@path) do + identifier = ((@template = find_partial) ? @template.identifier : @path) + + if @collection + instrument(:collection, :identifier => identifier || "collection", :count => @collection.size) do + render_collection + end + else + instrument(:partial, :identifier => identifier) do + render_partial + end + end + end + end + + def render_collection + return nil if @collection.blank? + + if @options.key?(:spacer_template) + spacer = find_template(@options[:spacer_template]).render(@view, @locals) + end + + result = @template ? collection_with_template : collection_without_template + result.join(spacer).html_safe + end + + def render_partial + locals, view, block = @locals, @view, @block + object, as = @object, @variable + + if !block && (layout = @options[:layout]) + layout = find_template(layout) + end + + object ||= locals[as] + locals[as] = object + + content = @template.render(view, locals) do |*name| + view._layout_for(*name, &block) + end + + content = layout.render(view, locals){ content } if layout + content + end + + private + + def collection + if @options.key?(:collection) + @options[:collection] || [] + end + end + + def collection_from_object + if @object.respond_to?(:to_ary) + @object + end + end + + def find_partial + if path = @path + locals = @locals.keys + locals << @variable + locals << @variable_counter if @collection + find_template(path, locals) + end + end + + def find_template(path=@path, locals=@locals.keys) + prefix = @view.controller_path unless path.include?(?/) + @lookup_context.find_template(path, prefix, true, locals) + end + + def collection_with_template + segments, locals, template = [], @locals, @template + as, counter = @variable, @variable_counter + + locals[counter] = -1 + + @collection.each do |object| + locals[counter] += 1 + locals[as] = object + segments << template.render(@view, locals) + end + + segments + end + + def collection_without_template + segments, locals, collection_data = [], @locals, @collection_data + index, template, cache = -1, nil, {} + keys = @locals.keys + + @collection.each_with_index do |object, i| + path, *data = collection_data[i] + template = (cache[path] ||= find_template(path, keys + data)) + locals[data[0]] = object + locals[data[1]] = (index += 1) + segments << template.render(@view, locals) + end + + @template = template + segments + end + + def partial_path(object = @object) + @partial_names[object.class.name] ||= begin + object = object.to_model if object.respond_to?(:to_model) + + object.class.model_name.partial_path.dup.tap do |partial| + path = @view.controller_path + partial.insert(0, "#{File.dirname(path)}/") if partial.include?(?/) && path.include?(?/) + end + end + end + + def retrieve_variable(path) + variable = @options[:as] || path[%r'_?(\w+)(\.\w+)*$', 1].to_sym + variable_counter = :"#{variable}_counter" if @collection + [variable, variable_counter] + end + end +end
\ No newline at end of file |