Module: RequirejsHelper

Defined in:
app/helpers/requirejs_helper.rb

Constant Summary collapse

@@_priority = 
[]

Instance Method Summary collapse

Instance Method Details

#_almond_include_tag(name, &block) ⇒ Object 



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# File 'app/helpers/requirejs_helper.rb', line 86

def _almond_include_tag(name, &block)
  "<script src='#{_javascript_path name}'></script>\n".html_safe
end

#_javascript_path(name) ⇒ Object 



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# File 'app/helpers/requirejs_helper.rb', line 90

def _javascript_path(name)
  if defined?(javascript_path)
    javascript_path(name)
  else
    "/assets/#{name}"
  end
end

#_once_guard ⇒ Object 



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# File 'app/helpers/requirejs_helper.rb', line 75

def _once_guard
  if defined?(controller) && controller.requirejs_included
    raise Requirejs::MultipleIncludeError, "Only one requirejs_include_tag allowed per page."
  end

  retval = yield

  controller.requirejs_included = true if defined?(controller)
  retval
end

#_requirejs_data(name, &block) ⇒ Object 



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# File 'app/helpers/requirejs_helper.rb', line 10

def _requirejs_data(name, &block)
  {}.tap do |data|
    if name
      name += ".js" unless name =~ /\.js$/
      data['main'] = _javascript_path(name).
                      sub(/\.js$/,'').
                      sub(base_url(name), '').
                      sub(/\A\//, '')
    end

    data.merge!(yield controller) if block_given?
  end.map do |k, v|
    %Q{data-#{k}="#{v}"}
  end.join(" ")
end

#base_url(js_asset) ⇒ Object 



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# File 'app/helpers/requirejs_helper.rb', line 98

def base_url(js_asset)
  js_asset_path = javascript_path(js_asset)
  uri = URI.parse(js_asset_path)
  asset_host = uri.host && js_asset_path.sub(uri.request_uri, '')
  [asset_host, Rails.application.config.relative_url_root, Rails.application.config.assets.prefix].join
end

#requirejs_include_tag(name = nil, &block) ⇒ Object 



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# File 'app/helpers/requirejs_helper.rb', line 26

def requirejs_include_tag(name=nil, &block)
  requirejs = Rails.application.config.requirejs

  if requirejs.loader == :almond
    name = requirejs.module_name_for(requirejs.build_config['modules'][0])
    return _almond_include_tag(name, &block)
  end

  html = ""

  _once_guard do
    unless requirejs.run_config.empty?
      run_config = requirejs.run_config.dup
      unless _priority.empty?
        run_config = run_config.dup
        run_config[:priority] ||= []
        run_config[:priority].concat _priority
      end
      if Rails.application.config.assets.digest
        modules = requirejs.build_config['modules'].map { |m| requirejs.module_name_for m }

        # Generate digestified paths from the modules spec
        paths = {}
        modules.each { |m| paths[m] = _javascript_path(m).sub /\.js$/,'' }

        if run_config.has_key? 'paths'
          # Add paths for assets specified by full URL (on a CDN)
          run_config['paths'].each { |k,v| paths[k] = v if v =~ /^https?:/ }
        end

        # Override user paths, whose mappings are only relevant in dev mode
        # and in the build_config.
        run_config['paths'] = paths
      end

      run_config['baseUrl'] = base_url(name)
      html.concat "      <script>var require = \#{run_config.to_json};</script>\n      HTML\n    end\n\n    html.concat <<-HTML\n    <script \#{_requirejs_data(name, &block)} src=\"\#{_javascript_path 'require.js'}\"></script>\n    HTML\n\n    html.html_safe\n  end\nend\n"