import Utils from '../aria-utils';
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const SubMenu = function(parent, domNode) {
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this.domNode = domNode;
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this.parent = parent;
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this.subMenuItems = [];
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this.subIndex = 0;
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this.init();
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};
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SubMenu.prototype.init = function() {
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this.subMenuItems = this.domNode.querySelectorAll('li');
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this.addListeners();
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};
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SubMenu.prototype.gotoSubIndex = function(idx) {
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if (idx === this.subMenuItems.length) {
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idx = 0;
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} else if (idx < 0) {
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idx = this.subMenuItems.length - 1;
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}
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this.subMenuItems[idx].focus();
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this.subIndex = idx;
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};
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SubMenu.prototype.addListeners = function() {
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const keys = Utils.keys;
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const parentNode = this.parent.domNode;
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Array.prototype.forEach.call(this.subMenuItems, el => {
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el.addEventListener('keydown', event => {
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let prevDef = false;
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switch (event.keyCode) {
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case keys.down:
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this.gotoSubIndex(this.subIndex + 1);
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prevDef = true;
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break;
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case keys.up:
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this.gotoSubIndex(this.subIndex - 1);
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prevDef = true;
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break;
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case keys.tab:
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Utils.triggerEvent(parentNode, 'mouseleave');
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break;
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case keys.enter:
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case keys.space:
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prevDef = true;
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event.currentTarget.click();
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break;
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}
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if (prevDef) {
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event.preventDefault();
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event.stopPropagation();
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}
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return false;
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});
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});
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};
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export default SubMenu;
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