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/**
* @file
* A Backbone View that renders the visual view of a contextual region element.
*/
(function (Drupal, Backbone) {
/**
* @deprecated in drupal:9.4.0 and is removed from drupal:12.0.0. There is no
* replacement.
*/
Drupal.contextual.RegionView = Backbone.View.extend(
/** @lends Drupal.contextual.RegionView# */ {
/**
* Events for the Backbone view.
*
* @return {object}
* A mapping of events to be used in the view.
*/
events() {
// Used for tracking the presence of touch events. When true, the
// mousemove and mouseenter event handlers are effectively disabled.
// This is used instead of preventDefault() on touchstart as some
// touchstart events are not cancelable.
let touchStart = false;
return {
touchstart() {
// Set to true so the mouseenter and mouseleave events that follow
// know to not execute any hover related logic.
touchStart = true;
},
mouseenter() {
if (!touchStart) {
this.model.set('regionIsHovered', true);
}
},
mouseleave() {
if (!touchStart) {
this.model.close().blur().set('regionIsHovered', false);
}
},
mousemove() {
// Because there are scenarios where there are both touchscreens
// and pointer devices, the touchStart flag should be set back to
// false after mouseenter and mouseleave complete. It will be set to
// true if another touchstart event occurs.
touchStart = false;
},
};
},
/**
* Renders the visual view of a contextual region element.
*
* @constructs
*
* @augments Backbone.View
*/
initialize() {
this.listenTo(this.model, 'change:hasFocus', this.render);
},
/**
* {@inheritdoc}
*
* @return {Drupal.contextual.RegionView}
* The current contextual region view.
*/
render() {
this.$el.toggleClass('focus', this.model.get('hasFocus'));
return this;
},
},
);
})(Drupal, Backbone);
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