2a09d1a4
 liuqimichale
添加宜春 天水 宣化
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import Utils from '../aria-utils';
const SubMenu = function(parent, domNode) {
this.domNode = domNode;
this.parent = parent;
this.subMenuItems = [];
this.subIndex = 0;
this.init();
};
SubMenu.prototype.init = function() {
this.subMenuItems = this.domNode.querySelectorAll('li');
this.addListeners();
};
SubMenu.prototype.gotoSubIndex = function(idx) {
if (idx === this.subMenuItems.length) {
idx = 0;
} else if (idx < 0) {
idx = this.subMenuItems.length - 1;
}
this.subMenuItems[idx].focus();
this.subIndex = idx;
};
SubMenu.prototype.addListeners = function() {
const keys = Utils.keys;
const parentNode = this.parent.domNode;
Array.prototype.forEach.call(this.subMenuItems, el => {
el.addEventListener('keydown', event => {
let prevDef = false;
switch (event.keyCode) {
case keys.down:
this.gotoSubIndex(this.subIndex + 1);
prevDef = true;
break;
case keys.up:
this.gotoSubIndex(this.subIndex - 1);
prevDef = true;
break;
case keys.tab:
Utils.triggerEvent(parentNode, 'mouseleave');
break;
case keys.enter:
case keys.space:
prevDef = true;
event.currentTarget.click();
break;
}
if (prevDef) {
event.preventDefault();
event.stopPropagation();
}
return false;
});
});
};
export default SubMenu;
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