[Openautomation-svn] SF.net SVN: openautomation:[638] CometVisu/trunk/visu/lib/templateengine.js

[<han...@us...>]

Revision: 638
          http://openautomation.svn.sourceforge.net/openautomation/?rev=638&view=rev
Author:   hannesloehr
Date:     2012-01-07 18:40:43 +0000 (Sat, 07 Jan 2012)
Log Message:
-----------
Added handling for browser back button => go one level higher in page hierarchy.

Modified Paths:
--------------
    CometVisu/trunk/visu/lib/templateengine.js

Modified: CometVisu/trunk/visu/lib/templateengine.js
===================================================================
--- CometVisu/trunk/visu/lib/templateengine.js	2012-01-06 19:01:35 UTC (rev 637)
+++ CometVisu/trunk/visu/lib/templateengine.js	2012-01-07 18:40:43 UTC (rev 638)
@@ -292,6 +292,19 @@
     main_scroll.seekTo( $(this).text() );
   });
 
+  
+  // reaction on browser back button
+  window.onpopstate = function(e) {
+	  
+	  // where do we come frome?
+	  lastpage = $.getUrlVar("lastpage");
+	  if (lastpage) {
+		  // browser back button takes us one level higher
+		  scrollToPage(lastpage);
+	  }
+  }
+
+  
   visu.subscribe( ga_list );
   $("#pages").triggerHandler("done");
 }
@@ -344,6 +357,40 @@
 function scrollToPage( page_id, speed )
 {
   $('#'+page_id).css( 'display', '' );                         // show new page
+
+  
+  // build url string with new lastpage parameter
+  url_vars = $.getUrlVars();
+  parameters = [];
+  
+  // filter old lastpage parameter
+  for (var i = 0; i < url_vars.length; i++) {
+      key = url_vars[i];
+      value = url_vars[key];
+	  if (key != "lastpage"){
+    	parameters.push(key+"="+value);
+	  }
+  }
+  
+  // which is the parent of target page_id?
+  // => set this id as lastpage in url for window.onpopstate handling 
+  var path = page_id.split( '_' );
+  if (path.length > 1){
+	  // above top level
+	  // the next to last item of path is the parent id
+	  path.pop();
+	  parameters.push("lastpage="+path.pop());
+  }
+  else {
+	  // top level
+	  parameters.push("lastpage="+page_id);
+  }
+  
+  // manipulate browser url
+  path = window.location.pathname+"?"+parameters.join("&");
+  window.history.pushState(page_id, page_id, path);
+  
+  
   main_scroll.seekTo( $('.page').index( $('#'+page_id)[0] ), speed ); // scroll to it
   var pagedivs=$('div', '#'+page_id); 
   for( var i = 0; i<pagedivs.length; i++) //check for inline diagrams & refresh

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