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hotkeys/dist/hotkeys.js

410 lines
11 KiB
JavaScript

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/*!
* hotkeys-js v3.3.7
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* A simple micro-library for defining and dispatching keyboard shortcuts. It has no dependencies.
*
* Copyright (c) 2018 kenny wong <wowohoo@qq.com>
* http://jaywcjlove.github.io/hotkeys
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*
* Licensed under the MIT license.
*/
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global.hotkeys = factory());
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}(this, (function () { 'use strict';
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var isff = typeof navigator !== 'undefined' ? navigator.userAgent.toLowerCase().indexOf('firefox') > 0 : false;
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// 绑定事件
function addEvent(object, event, method) {
if (object.addEventListener) {
object.addEventListener(event, method, false);
} else if (object.attachEvent) {
object.attachEvent('on' + event, function () {
method(window.event);
});
}
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}
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// 修饰键转换成对应的键码
function getMods(modifier, key) {
var mods = key.slice(0, key.length - 1);
for (var i = 0; i < mods.length; i++) {
mods[i] = modifier[mods[i].toLowerCase()];
}return mods;
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}
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// 处理传的key字符串转换成数组
function getKeys(key) {
if (!key) key = '';
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key = key.replace(/\s/g, ''); // 匹配任何空白字符,包括空格、制表符、换页符等等
var keys = key.split(','); // 同时设置多个快捷键,以','分割
var index = keys.lastIndexOf('');
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// 快捷键可能包含',',需特殊处理
for (; index >= 0;) {
keys[index - 1] += ',';
keys.splice(index, 1);
index = keys.lastIndexOf('');
}
return keys;
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}
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// 比较修饰键的数组
function compareArray(a1, a2) {
var arr1 = a1.length >= a2.length ? a1 : a2;
var arr2 = a1.length >= a2.length ? a2 : a1;
var isIndex = true;
for (var i = 0; i < arr1.length; i++) {
if (arr2.indexOf(arr1[i]) === -1) isIndex = false;
}
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return isIndex;
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}
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var _keyMap = { // 特殊键
backspace: 8,
tab: 9,
clear: 12,
enter: 13,
return: 13,
esc: 27,
escape: 27,
space: 32,
left: 37,
up: 38,
right: 39,
down: 40,
del: 46,
delete: 46,
ins: 45,
insert: 45,
home: 36,
end: 35,
pageup: 33,
pagedown: 34,
capslock: 20,
'⇪': 20,
',': 188,
'.': 190,
'/': 191,
'`': 192,
'-': isff ? 173 : 189,
'=': isff ? 61 : 187,
';': isff ? 59 : 186,
'\'': 222,
'[': 219,
']': 221,
'\\': 220
};
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var _modifier = { // 修饰键
'⇧': 16,
shift: 16,
'⌥': 18,
alt: 18,
option: 18,
'⌃': 17,
ctrl: 17,
control: 17,
'⌘': isff ? 224 : 91,
cmd: isff ? 224 : 91,
command: isff ? 224 : 91
};
var _downKeys = []; // 记录摁下的绑定键
var modifierMap = {
16: 'shiftKey',
18: 'altKey',
17: 'ctrlKey'
};
var _mods = { 16: false, 18: false, 17: false };
var _handlers = {};
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// F1~F12 特殊键
for (var k = 1; k < 20; k++) {
_keyMap['f' + k] = 111 + k;
}
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// 兼容Firefox处理
modifierMap[isff ? 224 : 91] = 'metaKey';
_mods[isff ? 224 : 91] = false;
var _scope = 'all'; // 默认热键范围
var isBindElement = false; // 是否绑定节点
// 返回键码
var code = function code(x) {
return _keyMap[x.toLowerCase()] || _modifier[x.toLowerCase()] || x.toUpperCase().charCodeAt(0);
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};
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// 设置获取当前范围(默认为'所有'
function setScope(scope) {
_scope = scope || 'all';
}
// 获取当前范围
function getScope() {
return _scope || 'all';
}
// 获取摁下绑定键的键值
function getPressedKeyCodes() {
return _downKeys.slice(0);
}
// 表单控件控件判断 返回 Boolean
function filter(event) {
var target = event.target || event.srcElement;
var tagName = target.tagName;
// 忽略这些情况下快捷键无效
return !(tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA' || target.isContentEditable);
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}
// 判断摁下的键是否为某个键返回true或者false
function isPressed(keyCode) {
if (typeof keyCode === 'string') {
keyCode = code(keyCode); // 转换成键码
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}
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return _downKeys.indexOf(keyCode) !== -1;
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}
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// 循环删除handlers中的所有 scope(范围)
function deleteScope(scope, newScope) {
var handlers = void 0;
var i = void 0;
// 没有指定scope获取scope
if (!scope) scope = getScope();
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for (var key in _handlers) {
if (Object.prototype.hasOwnProperty.call(_handlers, key)) {
handlers = _handlers[key];
for (i = 0; i < handlers.length;) {
if (handlers[i].scope === scope) handlers.splice(i, 1);else i++;
}
}
}
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// 如果scope被删除将scope重置为all
if (getScope() === scope) setScope(newScope || 'all');
}
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// 清除修饰键
function clearModifier(event) {
var key = event.keyCode || event.which || event.charCode;
var i = _downKeys.indexOf(key);
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// 从列表中清除按压过的键
if (i >= 0) _downKeys.splice(i, 1);
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// 修饰键 shiftKey altKey ctrlKey (command||metaKey) 清除
if (key === 93 || key === 224) key = 91;
if (key in _mods) {
_mods[key] = false;
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// 将修饰键重置为false
for (var k in _modifier) {
if (_modifier[k] === key) hotkeys[k] = false;
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}
}
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}
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// 解除绑定某个范围的快捷键
function unbind(key, scope) {
var multipleKeys = getKeys(key);
var keys = void 0;
var mods = [];
var obj = void 0;
for (var i = 0; i < multipleKeys.length; i++) {
// 将组合快捷键拆分为数组
keys = multipleKeys[i].split('+');
// 记录每个组合键中的修饰键的键码 返回数组
if (keys.length > 1) mods = getMods(_modifier, keys);
// 获取除修饰键外的键值key
key = keys[keys.length - 1];
key = key === '*' ? '*' : code(key);
// 判断是否传入范围,没有就获取范围
if (!scope) scope = getScope();
// 如何key不在 _handlers 中返回不做处理
if (!_handlers[key]) return;
// 清空 handlers 中数据,
// 让触发快捷键键之后没有事件执行到达解除快捷键绑定的目的
for (var r = 0; r < _handlers[key].length; r++) {
obj = _handlers[key][r];
// 判断是否在范围内并且键值相同
if (obj.scope === scope && compareArray(obj.mods, mods)) {
_handlers[key][r] = {};
}
}
}
}
// 对监听对应快捷键的回调函数进行处理
function eventHandler(event, handler, scope) {
var modifiersMatch = void 0;
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// 看它是否在当前范围
if (handler.scope === scope || handler.scope === 'all') {
// 检查是否匹配修饰符如果有返回true
modifiersMatch = handler.mods.length > 0;
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for (var y in _mods) {
if (Object.prototype.hasOwnProperty.call(_mods, y)) {
if (!_mods[y] && handler.mods.indexOf(+y) > -1 || _mods[y] && handler.mods.indexOf(+y) === -1) modifiersMatch = false;
}
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}
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// 调用处理程序,如果是修饰键不做处理
if (handler.mods.length === 0 && !_mods[16] && !_mods[18] && !_mods[17] && !_mods[91] || modifiersMatch || handler.shortcut === '*') {
if (handler.method(event, handler) === false) {
if (event.preventDefault) event.preventDefault();else event.returnValue = false;
if (event.stopPropagation) event.stopPropagation();
if (event.cancelBubble) event.cancelBubble = true;
}
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}
}
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}
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// 处理keydown事件
function dispatch(event) {
var asterisk = _handlers['*'];
var key = event.keyCode || event.which || event.charCode;
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// 搜集绑定的键
if (_downKeys.indexOf(key) === -1) _downKeys.push(key);
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// Gecko(Firefox)的command键值224在Webkit(Chrome)中保持一致
// Webkit左右command键值不一样
if (key === 93 || key === 224) key = 91;
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if (key in _mods) {
_mods[key] = true;
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// 将特殊字符的key注册到 hotkeys 上
for (var k in _modifier) {
if (_modifier[k] === key) hotkeys[k] = true;
}
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if (!asterisk) return;
}
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// 将modifierMap里面的修饰键绑定到event中
for (var e in _mods) {
if (Object.prototype.hasOwnProperty.call(_mods, e)) {
_mods[e] = event[modifierMap[e]];
}
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}
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// 表单控件过滤 默认表单控件不触发快捷键
if (!hotkeys.filter.call(this, event)) return;
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// 获取范围 默认为all
var scope = getScope();
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// 对任何快捷键都需要做的处理
if (asterisk) {
for (var i = 0; i < asterisk.length; i++) {
if (asterisk[i].scope === scope) eventHandler(event, asterisk[i], scope);
}
}
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// key 不在_handlers中返回
if (!(key in _handlers)) return;
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for (var _i = 0; _i < _handlers[key].length; _i++) {
// 找到处理内容
eventHandler(event, _handlers[key][_i], scope);
}
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}
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function hotkeys(key, option, method) {
var keys = getKeys(key); // 需要处理的快捷键列表
var mods = [];
var scope = 'all'; // scope默认为all所有范围都有效
var element = document; // 快捷键事件绑定节点
var i = 0;
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// 对为设定范围的判断
if (method === undefined && typeof option === 'function') {
method = option;
}
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if (Object.prototype.toString.call(option) === '[object Object]') {
if (option.scope) scope = option.scope; // eslint-disable-line
if (option.element) element = option.element; // eslint-disable-line
}
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if (typeof option === 'string') scope = option;
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// 对于每个快捷键进行处理
for (; i < keys.length; i++) {
key = keys[i].split('+'); // 按键列表
mods = [];
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// 如果是组合快捷键取得组合快捷键
if (key.length > 1) mods = getMods(_modifier, key);
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// 将非修饰键转化为键码
key = key[key.length - 1];
key = key === '*' ? '*' : code(key); // *表示匹配所有快捷键
// 判断key是否在_handlers中不在就赋一个空数组
if (!(key in _handlers)) _handlers[key] = [];
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_handlers[key].push({
scope: scope,
mods: mods,
shortcut: keys[i],
method: method,
key: keys[i]
});
}
// 在全局document上设置快捷键
if (typeof element !== 'undefined' && !isBindElement) {
isBindElement = true;
addEvent(element, 'keydown', function (e) {
dispatch(e);
});
addEvent(element, 'keyup', function (e) {
clearModifier(e);
});
}
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}
var _api = {
setScope: setScope,
getScope: getScope,
deleteScope: deleteScope,
getPressedKeyCodes: getPressedKeyCodes,
isPressed: isPressed,
filter: filter,
unbind: unbind
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};
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for (var a in _api) {
if (Object.prototype.hasOwnProperty.call(_api, a)) {
hotkeys[a] = _api[a];
}
}
if (typeof window !== 'undefined') {
var _hotkeys = window.hotkeys;
hotkeys.noConflict = function (deep) {
if (deep && window.hotkeys === hotkeys) {
window.hotkeys = _hotkeys;
}
return hotkeys;
};
window.hotkeys = hotkeys;
}
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return hotkeys;
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})));