Ticket #7984: 7984_4.patch

_source/plugins/autogrow/plugin.js

@@ -8 +8 @@
  */
 (function(){
 
+        var parts = [ "margin-top","margin-bottom","border-top-width", "border-bottom-width", "padding-top",  "padding-bottom" ];
+
+        function nonContentHeight( element )
+        {
+                var adjustment = 0;
+                for ( var i = 0, len = parts.length; i < len; i++ )
+                        adjustment += parseInt( element.getComputedStyle( parts[ i ] ) || 0, 10 ) || 0;
+                return adjustment;
+        }
+
+        // Spaces outside of  the actual content.
+        function extra( element )
+        {
+                var margin = 0;
+                margin += nonContentHeight( element);
+                if ( element.is( 'html' ) )
+                        margin += nonContentHeight( element.getDocument().getBody() );
+                return margin;
+        }
+
+        // Height of the actual content size within body,
+        // figured out by simply check the last element.
+        function docContentHeight( doc )
+        {
+                var lastElement = doc.getBody().getLast( function( node )
+                         {
+                                 return node.type == CKEDITOR.NODE_ELEMENT;
+                         });
+
+                return lastElement.getDocumentPosition( doc ).y + lastElement.$.offsetHeight
+        }
+
         CKEDITOR.plugins.add( 'autogrow',
         {
                 init : function( editor )
@@ -20 +52 @@
 
                                 var doc = editor.document,
                                         resizeable = editor.getResizable( 1 ),
-                                        body = doc.getBody().$,
-                                        htmlElement = doc.getDocumentElement().$,
+                                        body = doc.getBody(),
+                                        htmlElement = doc.getDocumentElement(),
                                         currentHeight = resizeable.$.offsetHeight,
                                         newHeight;
 
-                                // Quirks mode overflows body, standards oveflows document element.
-                                var delta,
-                                        scrollable = doc.$.compatMode == 'BackCompat' ? body : htmlElement,
-                                        increase = scrollable.scrollHeight - scrollable.clientHeight,
-                                        decrease = body.offsetHeight - scrollable.scrollHeight + contentMargin;
+                                // Quirks mode overflows body except for IE9, standards overflows document element.
+                                var scrollable = !CKEDITOR.env.ie9Compat && doc.$.compatMode == 'BackCompat' ? body : htmlElement,
+                                        contentHeight = docContentHeight( doc ),
+                                        delta = contentHeight - scrollable.$.clientHeight + extra( scrollable );
 
                                 // Delta height from either increasing or decreasing.
-                                if ( delta  =  increase ||decrease || 0 )
+                                if ( delta )
                                 {
                                         newHeight = currentHeight + delta;
                                         var min = editor.config.autoGrow_minHeight,