Webkit editor doesn't scroll without focus.

[Jakub Ś]

Issue found when reproducing #7635

1. Open replacebycode sample page
2. Paste the following code

   var doScroll = function(collapseToStart) {
    var e = CKEDITOR.instances.editor1;
    var d = e.document;
    var r = new CKEDITOR.dom.range(d);
    r.selectNodeContents(d.getBody());
    r.collapse(collapseToStart);
    r.select();
    e.focus();
    e.getSelection().scrollIntoView();
   };
   var scrollToTop = function() { doScroll(true); };
   var scrollToBottom = function() { doScroll(false); };
   				
   setTimeout(scrollToBottom, 2000);
   setTimeout(scrollToTop, 3000);
   setTimeout(scrollToBottom, 4000);
   

3. Open page in Webkit

Result: You will see that editor only scrolls down once when it has no focus. If it has focus it scrolls down-up-down.

Now add extra setTimeout function

setTimeout(scrollToTop, 1500);
setTimeout(scrollToBottom, 2000);
setTimeout(scrollToTop, 3000);
setTimeout(scrollToBottom, 4000);

If editor has no focus it scrolls down-up-down. If it has focus it scrolls up-down-up-down.

If there would be only one setTimeout function, you wouldn’t see any scrolling.

Webkit uses first function call to gain focus.