sp-magic.de/bower_components/foundation-sites/js/foundation.drilldown.js

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2016-10-28 17:56:41 +00:00
'use strict';
!function($) {
/**
* Drilldown module.
* @module foundation.drilldown
* @requires foundation.util.keyboard
* @requires foundation.util.motion
* @requires foundation.util.nest
*/
class Drilldown {
/**
* Creates a new instance of a drilldown menu.
* @class
* @param {jQuery} element - jQuery object to make into an accordion menu.
* @param {Object} options - Overrides to the default plugin settings.
*/
constructor(element, options) {
this.$element = element;
this.options = $.extend({}, Drilldown.defaults, this.$element.data(), options);
Foundation.Nest.Feather(this.$element, 'drilldown');
this._init();
Foundation.registerPlugin(this, 'Drilldown');
Foundation.Keyboard.register('Drilldown', {
'ENTER': 'open',
'SPACE': 'open',
'ARROW_RIGHT': 'next',
'ARROW_UP': 'up',
'ARROW_DOWN': 'down',
'ARROW_LEFT': 'previous',
'ESCAPE': 'close',
'TAB': 'down',
'SHIFT_TAB': 'up'
});
}
/**
* Initializes the drilldown by creating jQuery collections of elements
* @private
*/
_init() {
this.$submenuAnchors = this.$element.find('li.is-drilldown-submenu-parent').children('a');
this.$submenus = this.$submenuAnchors.parent('li').children('[data-submenu]');
this.$menuItems = this.$element.find('li').not('.js-drilldown-back').attr('role', 'menuitem').find('a');
this._prepareMenu();
this._keyboardEvents();
}
/**
* prepares drilldown menu by setting attributes to links and elements
* sets a min height to prevent content jumping
* wraps the element if not already wrapped
* @private
* @function
*/
_prepareMenu() {
var _this = this;
// if(!this.options.holdOpen){
// this._menuLinkEvents();
// }
this.$submenuAnchors.each(function(){
var $link = $(this);
var $sub = $link.parent();
if(_this.options.parentLink){
$link.clone().prependTo($sub.children('[data-submenu]')).wrap('<li class="is-submenu-parent-item is-submenu-item is-drilldown-submenu-item" role="menu-item"></li>');
}
$link.data('savedHref', $link.attr('href')).removeAttr('href');
$link.children('[data-submenu]')
.attr({
'aria-hidden': true,
'tabindex': 0,
'role': 'menu'
});
_this._events($link);
});
this.$submenus.each(function(){
var $menu = $(this),
$back = $menu.find('.js-drilldown-back');
if(!$back.length){
$menu.prepend(_this.options.backButton);
}
_this._back($menu);
});
if(!this.$element.parent().hasClass('is-drilldown')){
this.$wrapper = $(this.options.wrapper).addClass('is-drilldown');
this.$wrapper = this.$element.wrap(this.$wrapper).parent().css(this._getMaxDims());
}
}
/**
* Adds event handlers to elements in the menu.
* @function
* @private
* @param {jQuery} $elem - the current menu item to add handlers to.
*/
_events($elem) {
var _this = this;
$elem.off('click.zf.drilldown')
.on('click.zf.drilldown', function(e){
if($(e.target).parentsUntil('ul', 'li').hasClass('is-drilldown-submenu-parent')){
e.stopImmediatePropagation();
e.preventDefault();
}
// if(e.target !== e.currentTarget.firstElementChild){
// return false;
// }
_this._show($elem.parent('li'));
if(_this.options.closeOnClick){
var $body = $('body');
$body.off('.zf.drilldown').on('click.zf.drilldown', function(e){
if (e.target === _this.$element[0] || $.contains(_this.$element[0], e.target)) { return; }
e.preventDefault();
_this._hideAll();
$body.off('.zf.drilldown');
});
}
});
}
/**
* Adds keydown event listener to `li`'s in the menu.
* @private
*/
_keyboardEvents() {
var _this = this;
this.$menuItems.add(this.$element.find('.js-drilldown-back > a')).on('keydown.zf.drilldown', function(e){
var $element = $(this),
$elements = $element.parent('li').parent('ul').children('li').children('a'),
$prevElement,
$nextElement;
$elements.each(function(i) {
if ($(this).is($element)) {
$prevElement = $elements.eq(Math.max(0, i-1));
$nextElement = $elements.eq(Math.min(i+1, $elements.length-1));
return;
}
});
Foundation.Keyboard.handleKey(e, 'Drilldown', {
next: function() {
if ($element.is(_this.$submenuAnchors)) {
_this._show($element.parent('li'));
$element.parent('li').one(Foundation.transitionend($element), function(){
$element.parent('li').find('ul li a').filter(_this.$menuItems).first().focus();
});
return true;
}
},
previous: function() {
_this._hide($element.parent('li').parent('ul'));
$element.parent('li').parent('ul').one(Foundation.transitionend($element), function(){
setTimeout(function() {
$element.parent('li').parent('ul').parent('li').children('a').first().focus();
}, 1);
});
return true;
},
up: function() {
$prevElement.focus();
return true;
},
down: function() {
$nextElement.focus();
return true;
},
close: function() {
_this._back();
//_this.$menuItems.first().focus(); // focus to first element
},
open: function() {
if (!$element.is(_this.$menuItems)) { // not menu item means back button
_this._hide($element.parent('li').parent('ul'));
$element.parent('li').parent('ul').one(Foundation.transitionend($element), function(){
setTimeout(function() {
$element.parent('li').parent('ul').parent('li').children('a').first().focus();
}, 1);
});
} else if ($element.is(_this.$submenuAnchors)) {
_this._show($element.parent('li'));
$element.parent('li').one(Foundation.transitionend($element), function(){
$element.parent('li').find('ul li a').filter(_this.$menuItems).first().focus();
});
}
return true;
},
handled: function(preventDefault) {
if (preventDefault) {
e.preventDefault();
}
e.stopImmediatePropagation();
}
});
}); // end keyboardAccess
}
/**
* Closes all open elements, and returns to root menu.
* @function
* @fires Drilldown#closed
*/
_hideAll() {
var $elem = this.$element.find('.is-drilldown-submenu.is-active').addClass('is-closing');
$elem.one(Foundation.transitionend($elem), function(e){
$elem.removeClass('is-active is-closing');
});
/**
* Fires when the menu is fully closed.
* @event Drilldown#closed
*/
this.$element.trigger('closed.zf.drilldown');
}
/**
* Adds event listener for each `back` button, and closes open menus.
* @function
* @fires Drilldown#back
* @param {jQuery} $elem - the current sub-menu to add `back` event.
*/
_back($elem) {
var _this = this;
$elem.off('click.zf.drilldown');
$elem.children('.js-drilldown-back')
.on('click.zf.drilldown', function(e){
e.stopImmediatePropagation();
// console.log('mouseup on back');
_this._hide($elem);
});
}
/**
* Adds event listener to menu items w/o submenus to close open menus on click.
* @function
* @private
*/
_menuLinkEvents() {
var _this = this;
this.$menuItems.not('.is-drilldown-submenu-parent')
.off('click.zf.drilldown')
.on('click.zf.drilldown', function(e){
// e.stopImmediatePropagation();
setTimeout(function(){
_this._hideAll();
}, 0);
});
}
/**
* Opens a submenu.
* @function
* @fires Drilldown#open
* @param {jQuery} $elem - the current element with a submenu to open, i.e. the `li` tag.
*/
_show($elem) {
$elem.children('[data-submenu]').addClass('is-active');
/**
* Fires when the submenu has opened.
* @event Drilldown#open
*/
this.$element.trigger('open.zf.drilldown', [$elem]);
};
/**
* Hides a submenu
* @function
* @fires Drilldown#hide
* @param {jQuery} $elem - the current sub-menu to hide, i.e. the `ul` tag.
*/
_hide($elem) {
var _this = this;
$elem.addClass('is-closing')
.one(Foundation.transitionend($elem), function(){
$elem.removeClass('is-active is-closing');
$elem.blur();
});
/**
* Fires when the submenu has closed.
* @event Drilldown#hide
*/
$elem.trigger('hide.zf.drilldown', [$elem]);
}
/**
* Iterates through the nested menus to calculate the min-height, and max-width for the menu.
* Prevents content jumping.
* @function
* @private
*/
_getMaxDims() {
var max = 0, result = {};
this.$submenus.add(this.$element).each(function(){
var numOfElems = $(this).children('li').length;
max = numOfElems > max ? numOfElems : max;
});
result['min-height'] = `${max * this.$menuItems[0].getBoundingClientRect().height}px`;
result['max-width'] = `${this.$element[0].getBoundingClientRect().width}px`;
return result;
}
/**
* Destroys the Drilldown Menu
* @function
*/
destroy() {
this._hideAll();
Foundation.Nest.Burn(this.$element, 'drilldown');
this.$element.unwrap()
.find('.js-drilldown-back, .is-submenu-parent-item').remove()
.end().find('.is-active, .is-closing, .is-drilldown-submenu').removeClass('is-active is-closing is-drilldown-submenu')
.end().find('[data-submenu]').removeAttr('aria-hidden tabindex role');
this.$submenuAnchors.each(function() {
$(this).off('.zf.drilldown');
});
this.$element.find('a').each(function(){
var $link = $(this);
if($link.data('savedHref')){
$link.attr('href', $link.data('savedHref')).removeData('savedHref');
}else{ return; }
});
Foundation.unregisterPlugin(this);
};
}
Drilldown.defaults = {
/**
* Markup used for JS generated back button. Prepended to submenu lists and deleted on `destroy` method, 'js-drilldown-back' class required. Remove the backslash (`\`) if copy and pasting.
* @option
* @example '<\li><\a>Back<\/a><\/li>'
*/
backButton: '<li class="js-drilldown-back"><a tabindex="0">Back</a></li>',
/**
* Markup used to wrap drilldown menu. Use a class name for independent styling; the JS applied class: `is-drilldown` is required. Remove the backslash (`\`) if copy and pasting.
* @option
* @example '<\div class="is-drilldown"><\/div>'
*/
wrapper: '<div></div>',
/**
* Adds the parent link to the submenu.
* @option
* @example false
*/
parentLink: false,
/**
* Allow the menu to return to root list on body click.
* @option
* @example false
*/
closeOnClick: false
// holdOpen: false
};
// Window exports
Foundation.plugin(Drilldown, 'Drilldown');
}(jQuery);