app/views/layouts/editor.html.erb
<%# encoding: utf-8 %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width, maximum-scale=1.0, initial-scale=1.0"/>
<%= csrf_meta_tags %>
<title>Mercury Editor</title>
<%= stylesheet_link_tag *Cmsimple.configuration.editor_stylesheets %>
<%= javascript_include_tag *Cmsimple.configuration.editor_javascripts %>
</head>
<body>
<script id='page_json' type='text/content'>
<%= current_page.to_json.html_safe %>
</script>
<script type='text/javascript' charset="utf-8">
new CMSimple.Editor( new CMSimple.Page(JSON.parse($('#page_json').html())) )
</script>
</body>
</html>