preview window is scrolling according to cursor position in markdown buffer

markdown-preview-mode.el

@@ -95,6 +95,14 @@
   (mdpm:sent-preview-to mdpm:local-client))
 
 (defun mdpm:sent-preview-to (websocket)
+  (let ((mark-position-percent
+         (number-to-string
+          (truncate
+           (* 100
+              (/
+               (float (line-number-at-pos))
+               (count-lines (point-min) (point-max))))))))
+
     (when markdown-preview-mode
       (markdown markdown-output-buffer-name))
     (with-current-buffer (get-buffer markdown-output-buffer-name)
@@ -104,11 +112,14 @@
                             "<span id='style'>"
                             markdown-preview-style
                             "</span>"
+                            "<span id='position-percentage'>"
+                            mark-position-percent
+                            "</span>"
                             "<div id='content'>"
                             (buffer-substring-no-properties (point-min) (point-max))
                             "</div>"
                             "</div>")
-                         )))
+                           ))))
 
 (defun mdpm:start ()
   (mdpm:start-websocket-server)

preview.html

@@ -5,6 +5,11 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, minimal-ui">
     <title>Markdown preview</title>
     <link href="http://thomasf.github.io/solarized-css/solarized-dark.min.css" rel="stylesheet"></link>
+    <style>
+     code, kbd, pre, samp {
+         line-height: 1.2em;
+     }
+    </style>
     <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
     <script>
      (function($, undefined) {
@@ -23,6 +28,8 @@
          socket.onmessage = function(event) {
              loadCSS($(event.data).find("#style").text());
              $("#markdown-body").html($(event.data).find("#content").html());
+             var scroll = $(document).height() * ($(event.data).find("#position-percentage").html() / 100);
+             $("html, body").animate({ scrollTop: scroll }, 600);
          };
          socket.onerror = function(error) {
              alert("Error: " + error.message);