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(function ($, Drupal) {
"use strict";
/**
* Process elements with the .dropbutton class on page load.
*/
Drupal.behaviors.dropButton = {
attach: function (context, settings) {
var $dropbuttons = $(context).find('.dropbutton-wrapper').once('dropbutton');
if ($dropbuttons.length) {
// Adds the delegated handler that will toggle dropdowns on click.
var $body = $('body').once('dropbutton-click');
if ($body.length) {
$body.on('click', '.dropbutton-toggle', dropbuttonClickHandler);
}
// Initialize all buttons.
var il = $dropbuttons.length;
for (var i = 0; i < il; i++) {
DropButton.dropbuttons.push(new DropButton($dropbuttons[i], settings.dropbutton));
}
}
}
};
/**
* Delegated callback for opening and closing dropbutton secondary actions.
*/
function dropbuttonClickHandler(e) {
e.preventDefault();
$(e.target).closest('.dropbutton-wrapper').toggleClass('open');
}
/**
* A DropButton presents an HTML list as a button with a primary action.
*
* All secondary actions beyond the first in the list are presented in a
* dropdown list accessible through a toggle arrow associated with the button.
*
* @param {jQuery} $dropbutton
* A jQuery element.
*
* @param {Object} settings
* A list of options including:
* - {String} title: The text inside the toggle link element. This text is
* hidden from visual UAs.
*/
function DropButton(dropbutton, settings) {
// Merge defaults with settings.
var options = $.extend({'title': Drupal.t('List additional actions')}, settings);
var $dropbutton = $(dropbutton);
this.$dropbutton = $dropbutton;
this.$list = $dropbutton.find('.dropbutton');
// Find actions and mark them.
this.$actions = this.$list.find('li').addClass('dropbutton-action');
// Add the special dropdown only if there are hidden actions.
if (this.$actions.length > 1) {
// Identify the first element of the collection.
var $primary = this.$actions.slice(0, 1);
// Identify the secondary actions.
var $secondary = this.$actions.slice(1);
$secondary.addClass('secondary-action');
// Add toggle link.
$primary.after(Drupal.theme('dropbuttonToggle', options));
// Bind mouse events.
this.$dropbutton
.addClass('dropbutton-multiple')
.on({
/**
* Adds a timeout to close the dropdown on mouseleave.
*/
'mouseleave.dropbutton': $.proxy(this.hoverOut, this),
/**
* Clears timeout when mouseout of the dropdown.
*/
'mouseenter.dropbutton': $.proxy(this.hoverIn, this),
/**
* Similar to mouseleave/mouseenter, but for keyboard navigation.
*/
'focusout.dropbutton': $.proxy(this.focusOut, this),
'focusin.dropbutton': $.proxy(this.focusIn, this)
});
}
else {
this.$dropbutton.addClass('dropbutton-single');
}
}
/**
* Extend the DropButton constructor.
*/
$.extend(DropButton, {
/**
* Store all processed DropButtons.
*
* @type {Array}
*/
dropbuttons: []
});
/**
* Extend the DropButton prototype.
*/
$.extend(DropButton.prototype, {
/**
* Toggle the dropbutton open and closed.
*
* @param {Boolean} show
* (optional) Force the dropbutton to open by passing true or to close by
* passing false.
*/
toggle: function (show) {
var isBool = typeof show === 'boolean';
show = isBool ? show : !this.$dropbutton.hasClass('open');
this.$dropbutton.toggleClass('open', show);
},
hoverIn: function () {
// Clear any previous timer we were using.
if (this.timerID) {
window.clearTimeout(this.timerID);
}
},
hoverOut: function () {
// Wait half a second before closing.
this.timerID = window.setTimeout($.proxy(this, 'close'), 500);
},
open: function () {
this.toggle(true);
},
close: function () {
this.toggle(false);
},
focusOut: function (e) {
this.hoverOut.call(this, e);
},
focusIn: function (e) {
this.hoverIn.call(this, e);
}
});
$.extend(Drupal.theme, {
/**
* A toggle is an interactive element often bound to a click handler.
*
* @param {Object} options
* - {String} title: (optional) The HTML anchor title attribute and
* text for the inner span element.
*
* @return {String}
* A string representing a DOM fragment.
*/
dropbuttonToggle: function (options) {
return '<li class="dropbutton-toggle"><button type="button"><span class="dropbutton-arrow"><span class="visually-hidden">' + options.title + '</span></span></button></li>';
}
});
// Expose constructor in the public space.
Drupal.DropButton = DropButton;
})(jQuery, Drupal);
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