[FIX] web: crash in editable lists with date field

Assume an editable list view with a date(time) widget, click to
edit a line, focus the date field (the datepicker opens), press
ESC: there is a crash in the lib, and the datepicker remains open
forever.

This fix is twofold:
 - we added a check in the lib to prevent it from crashing (it is
 easily reproducible: it crashes when an opened datepicker is
 removed from the DOM).
 - we added an event handler of ESC keydown event to hide the
 datepicker before the field is removed from the DOM.

1 files changed, 12 insertions, 0 deletions

diff --git a/addons/web/static/src/js/widgets/date_picker.js b/addons/web/static/src/js/widgets/date_picker.js
index 367ab23178d..57c935905e5 100644
--- a/addons/web/static/src/js/widgets/date_picker.js
+++ b/addons/web/static/src/js/widgets/date_picker.js
@@ -15,6 +15,7 @@ var DateWidget = Widget.extend({
         'change.datetimepicker': 'changeDatetime',
         'change .o_datepicker_input': 'changeDatetime',
         'input input': '_onInput',
+        'keydown': '_onKeydown',
         'show.datetimepicker': '_onDateTimePickerShow',
     },
     /**
@@ -240,6 +241,17 @@ var DateWidget = Widget.extend({
         }
     },
     /**
+     * @private
+     * @param {KeyEvent} ev
+     */
+    _onKeydown: function (ev) {
+        if (ev.which === $.ui.keyCode.ESCAPE) {
+            this.__libInput++;
+            this.$el.datetimepicker('hide');
+            this.__libInput--;
+        }
+    },
+    /**
      * Prevents 'input' events triggered by the library to bubble up, as they
      * might have unwanted effects (like triggering 'field_changed' events in
      * the context of field widgets)