Class: ActionView::TemplateRenderer

Inherits:
AbstractRenderer show all
Defined in:
actionpack/lib/action_view/renderer/template_renderer.rb

Overview

:nodoc:

Direct Known Subclasses

StreamingTemplateRenderer

Instance Method Summary collapse

Methods inherited from AbstractRenderer

#formats_regexp, #initialize, #wrap_formats

Constructor Details

This class inherits a constructor from ActionView::AbstractRenderer

Instance Method Details

#determine_template(options) ⇒ Object

Determine the template to be rendered using the given options.


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# File 'actionpack/lib/action_view/renderer/template_renderer.rb', line 17

def determine_template(options) #:nodoc:
  keys = options[:locals].try(:keys) || []

  if options.key?(:text)
    Template::Text.new(options[:text], formats.try(:first))
  elsif options.key?(:file)
    with_fallbacks { find_template(options[:file], nil, false, keys) }
  elsif options.key?(:inline)
    handler = Template.handler_for_extension(options[:type] || "erb")
    Template.new(options[:inline], "inline template", handler, :locals => keys)
  elsif options.key?(:template)
    options[:template].respond_to?(:render) ?
      options[:template] : find_template(options[:template], options[:prefixes], false, keys)
  end
end

#find_layout(layout, keys) ⇒ Object

This is the method which actually finds the layout using details in the lookup context object. If no layout is found, it checks if at least a layout with the given name exists across all details before raising the error.


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# File 'actionpack/lib/action_view/renderer/template_renderer.rb', line 61

def find_layout(layout, keys)
  begin
    with_layout_format do
      layout =~ /^\// ?
        with_fallbacks { find_template(layout, nil, false, keys) } : find_template(layout, nil, false, keys)
    end
  rescue ActionView::MissingTemplate => e
    update_details(:formats => nil) do
      raise unless template_exists?(layout)
    end
  end
end

#render(context, options) ⇒ Object


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# File 'actionpack/lib/action_view/renderer/template_renderer.rb', line 6

def render(context, options)
  @view = context

  wrap_formats(options[:template] || options[:file]) do
    template = determine_template(options)
    freeze_formats(template.formats, true)
    render_template(template, options[:layout], options[:locals])
  end
end

#render_template(template, layout_name = nil, locals = {}) ⇒ Object

Renders the given template. An string representing the layout can be supplied as well.


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# File 'actionpack/lib/action_view/renderer/template_renderer.rb', line 35

def render_template(template, layout_name = nil, locals = {}) #:nodoc:
  view, locals = @view, locals || {}

  render_with_layout(layout_name, locals) do |layout|
    instrument(:template, :identifier => template.identifier, :layout => layout.try(:virtual_path)) do
      template.render(view, locals) { |*name| view._layout_for(*name) }
    end
  end
end

#render_with_layout(path, locals) ⇒ Object

:nodoc:


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# File 'actionpack/lib/action_view/renderer/template_renderer.rb', line 45

def render_with_layout(path, locals) #:nodoc:
  layout  = path && find_layout(path, locals.keys)
  content = yield(layout)

  if layout
    view = @view
    view.view_flow.set(:layout, content)
    layout.render(view, locals){ |*name| view._layout_for(*name) }
  else
    content
  end
end