In wp.Uploader, when uploader:ready is triggered, set ready to true on the instance. This allows media workflows to check for an existing uploaded instance when opening.

Without this check, workflows might wait for `uploader:ready`, which could already have been fired. This would result in an unresponsive editor dropzone.

Fixes #29689.


git-svn-id: https://develop.svn.wordpress.org/trunk@29917 602fd350-edb4-49c9-b593-d223f7449a82

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

@@ -3724,7 +3724,7 @@
 		},
 
 		drop: function( event ) {
-			var $wrap = null;
+			var $wrap = null, uploadView;
 
 			this.containerDragleave( event );
 			this.dropzoneDragleave( event );
@@ -3747,7 +3747,12 @@
 					title:    wp.media.view.l10n.addMedia,
 					multiple: true
 				});
-				this.workflow.on( 'uploader:ready', this.addFiles, this );
+				uploadView = this.workflow.uploader;
+				if ( uploadView.uploader && uploadView.uploader.ready ) {
+					this.addFiles.apply( this );
+				} else {
+					this.workflow.on( 'uploader:ready', this.addFiles, this );
+				}
 			} else {
 				this.workflow.state().reset();
 				this.addFiles.apply( this );

src/wp-includes/js/plupload/wp-plupload.js

@@ -158,7 +158,8 @@ window.wp = window.wp || {};
 					dropzone.trigger('dropzone:leave').removeClass('drag-over');
 				}, 0 );
 			});
-
+			
+			self.ready = true;
 			$(self).trigger( 'uploader:ready' );
 		});