Class: ActionView::TemplateRenderer

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

Overview

:nodoc:

Direct Known Subclasses

StreamingTemplateRenderer

Instance Method Summary collapse

Methods inherited from AbstractRenderer

#initialize

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 'lib/action_view/renderer/template_renderer.rb', line 21

def determine_template(options) #:nodoc:
  keys = options.fetch(:locals, {}).keys

  if options.key?(:text)
    Template::Text.new(options[:text], formats.first)
  elsif options.key?(:file)
    with_fallbacks { find_template(options[:file], nil, false, keys, @details) }
  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)
    if options[:template].respond_to?(:render)
      options[:template]
    else
      find_template(options[:template], options[:prefixes], false, keys, @details)
    end
  else
    raise ArgumentError, "You invoked render but did not give any of :partial, :template, :inline, :file or :text option."
  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 'lib/action_view/renderer/template_renderer.rb', line 70

def find_layout(layout, keys)
  with_layout_format { resolve_layout(layout, keys) }
end

#render(context, options) ⇒ Object 



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# File 'lib/action_view/renderer/template_renderer.rb', line 5

def render(context, options)
  @view    = context
  @details = extract_details(options)
  template = determine_template(options)
  context  = @lookup_context

  prepend_formats(template.formats)

  unless context.rendered_format
    context.rendered_format = template.formats.first || formats.first
  end

  render_template(template, options[:layout], options[:locals])
end

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

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



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# File 'lib/action_view/renderer/template_renderer.rb', line 44

def render_template(template, layout_name = nil, locals = nil) #: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 'lib/action_view/renderer/template_renderer.rb', line 54

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

#resolve_layout(layout, keys) ⇒ Object 



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# File 'lib/action_view/renderer/template_renderer.rb', line 74

def resolve_layout(layout, keys)
  case layout
  when String
    begin
      if layout =~ /^\//
        with_fallbacks { find_template(layout, nil, false, keys, @details) }
      else
        find_template(layout, nil, false, keys, @details)
      end
    rescue ActionView::MissingTemplate
      all_details = @details.merge(:formats => @lookup_context.default_formats)
      raise unless template_exists?(layout, nil, false, keys, all_details)
    end
  when Proc
    resolve_layout(layout.call, keys)
  when FalseClass
    nil
  else
    layout
  end
end