Merge branch 't/12143' into major

CHANGES.md

@@ -11,6 +11,7 @@ New Features:
   * [#12168](http://dev.ckeditor.com/ticket/12168): `dataTransfer` facade.
   * [#12169](http://dev.ckeditor.com/ticket/12169): Introduce [`editor.drop`](http://docs.ckeditor.com/#!/api/CKEDITOR.editor-event-drop), [`editor.dragstart`](http://docs.ckeditor.com/#!/api/CKEDITOR.editor-event-dragstart) and [`editor.dragend`](http://docs.ckeditor.com/#!/api/CKEDITOR.editor-event-dragend) events.
 * [#11583](http://dev.ckeditor.com/ticket/11583): Added support for HTML5 `required` attribute in various form elements. Thanks to [Steven Busse](https://github.com/sbusse)!
+* [#12143](http://dev.ckeditor.com/ticket/12143): Added [`config.floatSpacePreferRight`](http://docs.ckeditor.com/#!/api/CKEDITOR.config-cfg-floatSpacePreferRight) configuration option that switches the alignment of the floating toolbar. Thanks to [InvisibleBacon](http://github.com/InvisibleBacon)!
 
 Fixed Issues:
 

plugins/floatingspace/plugin.js

@@ -161,12 +161,15 @@
 						changeMode( 'bottom' );
 
 					var mid = viewRect.width / 2,
-						alignSide =
-								( editorRect.left > 0 && editorRect.right < viewRect.width && editorRect.width > spaceRect.width ) ?
-										( editor.config.contentsLangDirection == 'rtl' ? 'right' : 'left' )
-									:
-										( mid - editorRect.left > editorRect.right - mid ? 'left' : 'right' ),
-						offset;
+						alignSide, offset;
+
+					if ( config.floatSpacePreferRight ) {
+						alignSide = 'right';
+					} else if ( editorRect.left > 0 && editorRect.right < viewRect.width && editorRect.width > spaceRect.width ) {
+						alignSide = config.contentsLangDirection == 'rtl' ? 'right' : 'left';
+					} else {
+						alignSide = mid - editorRect.left > editorRect.right - mid ? 'left' : 'right';
+					}
 
 					// (#9769) If viewport width is less than space width,
 					// make sure space never cross the left boundary of the viewport.
@@ -377,3 +380,13 @@
  * @cfg {Number} [floatSpacePinnedOffsetY=0]
  * @member CKEDITOR.config
  */
+
+/**
+ * Indicates that the float space should be aligned to the right side
+ * of editable area rather than to the left (if possible).
+ *
+ *		config.floatSpacePreferRight = true;
+ *
+ * @cfg {Boolean} [floatSpacePreferRight=false]
+ * @member CKEDITOR.config
+ */