126 lines
3.0 KiB
JavaScript
126 lines
3.0 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
exports.__esModule = true;
|
||
|
|
var aria = aria || {};
|
||
|
|
|
||
|
|
aria.Utils = aria.Utils || {};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @desc Set focus on descendant nodes until the first focusable element is
|
||
|
|
* found.
|
||
|
|
* @param element
|
||
|
|
* DOM node for which to find the first focusable descendant.
|
||
|
|
* @returns
|
||
|
|
* true if a focusable element is found and focus is set.
|
||
|
|
*/
|
||
|
|
aria.Utils.focusFirstDescendant = function (element) {
|
||
|
|
for (var i = 0; i < element.childNodes.length; i++) {
|
||
|
|
var child = element.childNodes[i];
|
||
|
|
if (aria.Utils.attemptFocus(child) || aria.Utils.focusFirstDescendant(child)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @desc Find the last descendant node that is focusable.
|
||
|
|
* @param element
|
||
|
|
* DOM node for which to find the last focusable descendant.
|
||
|
|
* @returns
|
||
|
|
* true if a focusable element is found and focus is set.
|
||
|
|
*/
|
||
|
|
|
||
|
|
aria.Utils.focusLastDescendant = function (element) {
|
||
|
|
for (var i = element.childNodes.length - 1; i >= 0; i--) {
|
||
|
|
var child = element.childNodes[i];
|
||
|
|
if (aria.Utils.attemptFocus(child) || aria.Utils.focusLastDescendant(child)) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @desc Set Attempt to set focus on the current node.
|
||
|
|
* @param element
|
||
|
|
* The node to attempt to focus on.
|
||
|
|
* @returns
|
||
|
|
* true if element is focused.
|
||
|
|
*/
|
||
|
|
aria.Utils.attemptFocus = function (element) {
|
||
|
|
if (!aria.Utils.isFocusable(element)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
aria.Utils.IgnoreUtilFocusChanges = true;
|
||
|
|
try {
|
||
|
|
element.focus();
|
||
|
|
} catch (e) {}
|
||
|
|
aria.Utils.IgnoreUtilFocusChanges = false;
|
||
|
|
return document.activeElement === element;
|
||
|
|
};
|
||
|
|
|
||
|
|
aria.Utils.isFocusable = function (element) {
|
||
|
|
if (element.tabIndex > 0 || element.tabIndex === 0 && element.getAttribute('tabIndex') !== null) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (element.disabled) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (element.nodeName) {
|
||
|
|
case 'A':
|
||
|
|
return !!element.href && element.rel !== 'ignore';
|
||
|
|
case 'INPUT':
|
||
|
|
return element.type !== 'hidden' && element.type !== 'file';
|
||
|
|
case 'BUTTON':
|
||
|
|
case 'SELECT':
|
||
|
|
case 'TEXTAREA':
|
||
|
|
return true;
|
||
|
|
default:
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 触发一个事件
|
||
|
|
* mouseenter, mouseleave, mouseover, keyup, change, click 等
|
||
|
|
* @param {Element} elm
|
||
|
|
* @param {String} name
|
||
|
|
* @param {*} opts
|
||
|
|
*/
|
||
|
|
aria.Utils.triggerEvent = function (elm, name) {
|
||
|
|
var eventName = void 0;
|
||
|
|
|
||
|
|
if (/^mouse|click/.test(name)) {
|
||
|
|
eventName = 'MouseEvents';
|
||
|
|
} else if (/^key/.test(name)) {
|
||
|
|
eventName = 'KeyboardEvent';
|
||
|
|
} else {
|
||
|
|
eventName = 'HTMLEvents';
|
||
|
|
}
|
||
|
|
var evt = document.createEvent(eventName);
|
||
|
|
|
||
|
|
for (var _len = arguments.length, opts = Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
|
||
|
|
opts[_key - 2] = arguments[_key];
|
||
|
|
}
|
||
|
|
|
||
|
|
evt.initEvent.apply(evt, [name].concat(opts));
|
||
|
|
elm.dispatchEvent ? elm.dispatchEvent(evt) : elm.fireEvent('on' + name, evt);
|
||
|
|
|
||
|
|
return elm;
|
||
|
|
};
|
||
|
|
|
||
|
|
aria.Utils.keys = {
|
||
|
|
tab: 9,
|
||
|
|
enter: 13,
|
||
|
|
space: 32,
|
||
|
|
left: 37,
|
||
|
|
up: 38,
|
||
|
|
right: 39,
|
||
|
|
down: 40,
|
||
|
|
esc: 27
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.default = aria.Utils;
|