Class: Locomotive::Steam::Middlewares::PageEditing

Inherits:
Object
  • Object
show all
Defined in:
lib/locomotive/steam/middlewares/page_editing.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, opts = {}) ⇒ PageEditing

Returns a new instance of PageEditing.


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# File 'lib/locomotive/steam/middlewares/page_editing.rb', line 9

def initialize(app, opts = {})
  @app = app
end

Instance Method Details

#call(env) ⇒ Object


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# File 'lib/locomotive/steam/middlewares/page_editing.rb', line 13

def call(env)
  disable_live_editing_if_not_html(env)

  status, headers, response = @app.call(env)

  site, mounted_on, page, locale, live_editing = env['steam.site'], env['steam.mounted_on'], env['steam.page'], env['steam.locale'].to_s, env['steam.live_editing']

  if editable?(page, response, live_editing)
    html = %(
      <meta name="locomotive-locale" content="#{locale}" />
      <meta name="locomotive-editable-elements-path" content="#{editable_elements_path(site, page, locale, env)}" />
      <meta name="locomotive-page-id" content="#{page._id}" />
      <meta name="locomotive-content-entry-id" content="#{content_entry_id(env)}" />
      <meta name="locomotive-mounted-on" content="#{mounted_on}" />

      <link href='https://fonts.googleapis.com/css?family=Noto+Sans' rel='stylesheet' type='text/css'>

      <!-- [Locomotive] fix absolute links to inner pages in preview mode-->
      <script type="text/javascript">
        window.document.addEventListener('click', function(event) {
          var qs = document.querySelectorAll('a');
          if (qs) {
            var el = event.target, index = -1;
            while (el && ((index = Array.prototype.indexOf.call(qs, el)) === -1)) {
              el = el.parentElement;
            }
            if (index > -1) {
              var url = el.getAttribute('href');
              if (url && url[0] == '/' && url.indexOf('#{mounted_on}') == -1 && url.indexOf('/sites/') == -1) {
                el.setAttribute('href', '#{mounted_on}' + url);
              }
            }
          }
        });
      </script>
    )
    response.first.gsub!('</head>', %(#{html}</head>))

    # make sure there is no span tags within the head.
    # For the record, Steam adds a span tag next to a block liquid tag
    response.first.gsub!(/<head>(.+)<\/head>/m) do
      head = Regexp.last_match[1]
      "<head>#{head.gsub(/<span/, '<meta').gsub(/<\/span>/, '</meta>')}</head>"
    end

    # new way of letting the parent window know about the status of the preview
    response.first.gsub!('</body>', %(
        <script type="text/javascript">
          if (window.parent) {
            console.log(window.parent);
            var event = new CustomEvent('LocomotivePreviewReady', {
              detail: {
                locale: "#{locale}",
                pageId: "#{page._id}",
                contentEntryId: "#{content_entry_id(env)}",
                mountedOn: "#{mounted_on}"
              }
            });
            window.parent.document.dispatchEvent(event);
          }
        </script>
      </body>
    ))
  end

  [status, headers, response]
end