From a33829d1d080d456f7e12d31f4948f689eac763c Mon Sep 17 00:00:00 2001
From: Andrew Ozz <azaozz@git.wordpress.org>
Date: Fri, 14 Mar 2014 00:41:12 +0000
Subject: [PATCH] Drag/drop upload: don't trigger on "local" dragging, hide the
 overlay on click. Props kovshenin, fixes #19845

git-svn-id: https://develop.svn.wordpress.org/trunk@27531 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-includes/js/media-views.js             | 37 ++++++++++++++++---
 .../js/tinymce/plugins/wordpress/plugin.js    |  6 +--
 2 files changed, 35 insertions(+), 8 deletions(-)

diff --git a/src/wp-includes/js/media-views.js b/src/wp-includes/js/media-views.js
index 36a47727dc..fd65937794 100644
--- a/src/wp-includes/js/media-views.js
+++ b/src/wp-includes/js/media-views.js
@@ -3475,7 +3475,13 @@
 		className: 'uploader-editor',
 		template:  media.template( 'uploader-editor' ),
 
+		localDrag: false,
+		overContainer: false,
+		overDropzone: false,
+
 		initialize: function() {
+			var self = this;
+
 			this.initialized = false;
 
 			// Bail if UA does not support drag'n'drop or File API.
@@ -3490,10 +3496,15 @@
 			this.$document.on( 'drop', '.uploader-editor', _.bind( this.drop, this ) );
 			this.$document.on( 'dragover', '.uploader-editor', _.bind( this.dropzoneDragover, this ) );
 			this.$document.on( 'dragleave', '.uploader-editor', _.bind( this.dropzoneDragleave, this ) );
+			this.$document.on( 'click', '.uploader-editor', _.bind( this.click, this ) );
 
 			this.$document.on( 'dragover', _.bind( this.containerDragover, this ) );
 			this.$document.on( 'dragleave', _.bind( this.containerDragleave, this ) );
 
+			this.$document.on( 'dragstart dragend drop', function( event ) {
+				self.localDrag = event.type === 'dragstart';
+			});
+
 			this.initialized = true;
 			return this;
 		},
@@ -3541,16 +3552,17 @@
 		drop: function( event ) {
 			var $wrap = null;
 
-			this.files = event.originalEvent.dataTransfer.files;
-			if ( this.files.length < 1 )
-				return;
-
 			this.containerDragleave( event );
 			this.dropzoneDragleave( event );
 
+			this.files = event.originalEvent.dataTransfer.files;
+			if ( this.files.length < 1 ) {
+				return;
+			}
+
 			// Set the active editor to the drop target.
 			$wrap = $( event.target ).parents( '.wp-editor-wrap' );
-			if ( $wrap.length > 0 ) {
+			if ( $wrap.length > 0 && $wrap[0].id ) {
 				window.wpActiveEditor = $wrap[0].id.slice( 3, -5 );
 			}
 
@@ -3580,6 +3592,10 @@
 		},
 
 		containerDragover: function() {
+			if ( this.localDrag ) {
+				return;
+			}
+
 			this.overContainer = true;
 			this.refresh();
 		},
@@ -3592,6 +3608,10 @@
 		},
 
 		dropzoneDragover: function( e ) {
+			if ( this.localDrag ) {
+				return;
+			}
+
 			this.overDropzone = true;
 			this.refresh( e );
 			return false;
@@ -3600,6 +3620,13 @@
 		dropzoneDragleave: function( e ) {
 			this.overDropzone = false;
 			_.delay( _.bind( this.refresh, this, e ), 50 );
+		},
+
+		click: function( e ) {
+			// In the rare case where the dropzone gets stuck, hide it on click.
+			this.containerDragleave( e );
+			this.dropzoneDragleave( e );
+			this.localDrag = false;
 		}
 	});
 
diff --git a/src/wp-includes/js/tinymce/plugins/wordpress/plugin.js b/src/wp-includes/js/tinymce/plugins/wordpress/plugin.js
index 3534e6aa62..51f26dcdb8 100644
--- a/src/wp-includes/js/tinymce/plugins/wordpress/plugin.js
+++ b/src/wp-includes/js/tinymce/plugins/wordpress/plugin.js
@@ -379,10 +379,10 @@ tinymce.PluginManager.add( 'wordpress', function( editor ) {
 			});
 		}
 
-		dom.bind( doc, 'dragover', function( event ) {
+		dom.bind( doc, 'dragstart dragend dragover drop', function( event ) {
 			if ( typeof window.jQuery !== 'undefined' ) {
-				// Propagate the event to its container for the parent window to catch.
-				window.jQuery( editor.getContainer() ).trigger( event );
+				// Trigger the jQuery handlers.
+				window.jQuery( document ).triggerHandler( event.type );
 			}
 		});
 	});