cheet JS

!function(global){"use strict";function keydown(e){var id,k=e?e.keyCode:event.keyCode;if(!held[k]){held[k]=!0;for(id in sequences)sequences[id].keydown(k)}}function keyup(e){var k=e?e.keyCode:event.keyCode;held[k]=!1}function resetHeldKeys(){var k;for(k in held)held[k]=!1}function on(obj,type,fn){obj.addEventListener?obj.addEventListener(type,fn,!1):obj.attachEvent&&(obj["e"+type+fn]=fn,obj[type+fn]=function(){obj["e"+type+fn](window.event)},obj.attachEvent("on"+type,obj[type+fn]))}var cheet,Sequence,sequences={},keys={backspace:8,tab:9,enter:13,"return":13,shift:16,"⇧":16,control:17,ctrl:17,"⌃":17,alt:18,option:18,"⌥":18,pause:19,capslock:20,esc:27,space:32,pageup:33,pagedown:34,end:35,home:36,left:37,L:37,"←":37,up:38,U:38,"↑":38,right:39,R:39,"→":39,down:40,D:40,"↓":40,insert:45,"delete":46,0:48,1:49,2:50,3:51,4:52,5:53,6:54,7:55,8:56,9:57,a:65,b:66,c:67,d:68,e:69,f:70,g:71,h:72,i:73,j:74,k:75,l:76,m:77,n:78,o:79,p:80,q:81,r:82,s:83,t:84,u:85,v:86,w:87,x:88,y:89,z:90,"⌘":91,command:91,kp_0:96,kp_1:97,kp_2:98,kp_3:99,kp_4:100,kp_5:101,kp_6:102,kp_7:103,kp_8:104,kp_9:105,kp_multiply:106,kp_plus:107,kp_minus:109,kp_decimal:110,kp_divide:111,f1:112,f2:113,f3:114,f4:115,f5:116,f6:117,f7:118,f8:119,f9:120,f10:121,f11:122,f12:123,equal:187,"=":187,comma:188,",":188,minus:189,"-":189,period:190,".":190},NOOP=function(){},held={};Sequence=function(str,next,fail,done){var i;for(this.str=str,this.next=next?next:NOOP,this.fail=fail?fail:NOOP,this.done=done?done:NOOP,this.seq=str.split(" "),this.keys=[],i=0;i<this.seq.length;++i)this.keys.push(keys[this.seq[i]]);this.idx=0},Sequence.prototype.keydown=function(keyCode){var i=this.idx;return keyCode!==this.keys[i]?void(i>0&&(this.reset(),this.fail(this.str),cheet.__fail(this.str))):(this.next(this.str,this.seq[i],i,this.seq),cheet.__next(this.str,this.seq[i],i,this.seq),void(++this.idx===this.keys.length&&(this.done(this.str),cheet.__done(this.str),this.reset())))},Sequence.prototype.reset=function(){this.idx=0},cheet=function(str,handlers){var next,fail,done;"function"==typeof handlers?done=handlers:null!==handlers&&void 0!==handlers&&(next=handlers.next,fail=handlers.fail,done=handlers.done),sequences[str]=new Sequence(str,next,fail,done)},cheet.disable=function(str){delete sequences[str]},on(window,"keydown",keydown),on(window,"keyup",keyup),on(window,"blur",resetHeldKeys),on(window,"focus",resetHeldKeys),cheet.__next=NOOP,cheet.next=function(fn){cheet.__next=null===fn?NOOP:fn},cheet.__fail=NOOP,cheet.fail=function(fn){cheet.__fail=null===fn?NOOP:fn},cheet.__done=NOOP,cheet.done=function(fn){cheet.__done=null===fn?NOOP:fn},cheet.reset=function(id){var seq=sequences[id];return seq instanceof Sequence?void seq.reset():void console.warn("cheet: Unknown sequence: "+id)},global.cheet=cheet,"function"==typeof define&&define.amd?define([],function(){return cheet}):"undefined"!=typeof module&&null!==module&&(module.exports=cheet)}(this);