Ticket #19845: 19845.7.diff

src/wp-includes/js/media-views.js

@@ -3520 +3520 @@
                         return supports;
                 },
 
+                isDraggingFile: function( e ) {
+                        if ( _.isUndefined( e.originalEvent ) || _.isUndefined( e.originalEvent.dataTransfer ) )
+                                return false;
+
+                        return _.indexOf( event.dataTransfer.types, 'Files' ) > -1;
+                },
+
                 refresh: function( e ) {
                         var dropzone_id;
                         for ( dropzone_id in this.dropzones ) {
@@ -3593 +3600 @@
                         return this;
                 },
 
-                containerDragover: function() {
+                containerDragover: function( e ) {
+                        if ( ! this.isDraggingFile( e ) )
+                                return;
+
                         this.overContainer = true;
-                        this.refresh();
+                        this.refresh( e );
                 },
 
-                containerDragleave: function() {
+                containerDragleave: function( e ) {
+                        if ( ! this.isDraggingFile( e ) )
+                                return;
+
                         this.overContainer = false;
-
                         // Throttle dragleave because it's called when bouncing from some elements to others.
-                        _.delay( _.bind( this.refresh, this ), 50 );
+                        _.delay( _.bind( this.refresh, this, e ), 50 );
                 },
 
                 dropzoneDragover: function( e ) {
+                        if ( ! this.isDraggingFile( e ) )
+                                return;
+
                         this.overDropzone = true;
                         this.refresh( e );
                         return false;
                 },
 
                 dropzoneDragleave: function( e ) {
+                        if ( ! this.isDraggingFile( e ) )
+                                return;
+
                         this.overDropzone = false;
                         _.delay( _.bind( this.refresh, this, e ), 50 );
                 }