MDL-52825 atto: Ignore out of bounds event targets

lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor-debug.js

@@ -1952,10 +1952,15 @@ EditorSelection.prototype = {
         // To capture both mouseup and touchend events, we need to track the gesturemoveend event in standAlone mode. Without
         // standAlone, it will only fire if we listened to a gesturemovestart too.
         this.editor.on('gesturemoveend', function(e) {
-                Y.soon(Y.bind(this._hasSelectionChanged, this, e));
-            }, {
-                standAlone: true
-            }, this);
+
+            // Ignore the event if the target is not part of the current editor.
+            if (!this._wrapper.contains(e.target._node)) {
+                return;
+            }
+            Y.soon(Y.bind(this._hasSelectionChanged, this, e));
+        }, {
+            standAlone: true
+        }, this);
 
         return this;
     },

lib/editor/atto/yui/build/moodle-editor_atto-editor/moodle-editor_atto-editor.js

@@ -1939,10 +1939,15 @@ EditorSelection.prototype = {
         // To capture both mouseup and touchend events, we need to track the gesturemoveend event in standAlone mode. Without
         // standAlone, it will only fire if we listened to a gesturemovestart too.
         this.editor.on('gesturemoveend', function(e) {
-                Y.soon(Y.bind(this._hasSelectionChanged, this, e));
-            }, {
-                standAlone: true
-            }, this);
+
+            // Ignore the event if the target is not part of the current editor.
+            if (!this._wrapper.contains(e.target._node)) {
+                return;
+            }
+            Y.soon(Y.bind(this._hasSelectionChanged, this, e));
+        }, {
+            standAlone: true
+        }, this);
 
         return this;
     },

lib/editor/atto/yui/src/editor/js/selection.js

@@ -97,10 +97,15 @@ EditorSelection.prototype = {
         // To capture both mouseup and touchend events, we need to track the gesturemoveend event in standAlone mode. Without
         // standAlone, it will only fire if we listened to a gesturemovestart too.
         this.editor.on('gesturemoveend', function(e) {
-                Y.soon(Y.bind(this._hasSelectionChanged, this, e));
-            }, {
-                standAlone: true
-            }, this);
+
+            // Ignore the event if the target is not part of the current editor.
+            if (!this._wrapper.contains(e.target._node)) {
+                return;
+            }
+            Y.soon(Y.bind(this._hasSelectionChanged, this, e));
+        }, {
+            standAlone: true
+        }, this);
 
         return this;
     },