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javascript undo redo
在浏览器中用调试工具看调用结果
Javascript代码- 1.<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
- 2. "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
- 3.<html xmlns="http://www.w3.org/1999/xhtml">
- 4.<head>
- 5. <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
- 6. <title>javascript</title>
- 7.</head>
- 8.
- 9.<body>
- 10.<input type="button" value=" - " id="a" /> <input type="button" value=" + " id="b" />
- 11.
- 12.<input type="button" value=" - " id="c" /> <input type="button" value=" + " id="d" />
- 13.<script type="text/javascript">
- 14. /*function a() {
- 15. Do([].slice.call(arguments));
- 16. }
- 17. function Do() {
- 18. var temp = (arguments[0]),indicator = arguments.callee;
- 19. indicator.stack = [];
- 20. indicator.stack[0] = temp;
- 21. }
- 22. a({c:1,b:2}, 123, function(arg) {
- 23. return arg+1;
- 24. });
- 25. function dir() {
- 26. console.log(arguments[0]);
- 27. }
- 28. dir(Do.stack[0][2](3));*/
- 29.
- 30. function MemoryDo(step){
- 31.
- 32. var indicator,that,fn,slice,args;
- 33. (
- 34. indicator=arguments.callee,
- 35. slice=[].slice
- 36. )
- 37. if(!(this instanceof indicator)){return new indicator(step);}
- 38.
- 39. indicator.keys={};
- 40. that=this;
- 41. this.stack=[];
- 42. this.index=0;
- 43.
- 44.
- 45. fn = indicator.prototype;
- 46. fn.constructor = indicator;
- 47.
- 48. fn.is=function(o){
- 49. return ({}).toString.call(o).slice(8, -1);
- 50. }
- 51. fn.slice=function(o,index){
- 52. return slice.call(o,index || 0);
- 53. }
- 54. fn.setIndex=function(number){
- 55. if(number<0 || this.is(this.index)!=='Number'){return};
- 56. this.index=number;
- 57. }
- 58. fn.getIndex=function(){
- 59. return this.is(this.index)==='Number' ? this.index : null;
- 60. }
- 61. fn.sign=function(){
- 62. return ('abcdefghijk'[Math.random().toFixed(1) * 10]+this.randomNumber(10000,10000000));
- 63. }
- 64. fn.randomNumber=function(a,b){
- 65. return Math.round(Math.random()*b+a);
- 66. }
- 67. fn.dataBuffer=function(){
- 68. var temp,socureCall=arguments.callee.caller,flag=arguments[0][arguments[0].length-1],data;
- 69. if (socureCall.arguments.length !== arguments[0].length || indicator.keys[flag]==='used') return;
- 70.
- 71. data=this.stack;
- 72. if(data.length===this.step){data.shift()};
- 73.
- 74. temp=data[data.length]=[];
- 75. temp[temp.length]=(this.slice(arguments[0],0)).concat(this.sn);
- 76. temp[temp.length]=arguments.callee.caller;
- 77.
- 78. indicator.keys[this.sn]='used';
- 79.
- 80. this.index=this.stack.length;
- 81. }
- 82. fn.redo=function(){
- 83. //var data=indicator.stack[indicator.stack.length-1];
- 84. //console.log(data);
- 85. if(this.index===this.stack.length){
- 86. this.re=-1;return;
- 87. }else{
- 88. this.re=1;
- 89. this.virtualDo(this.index+=1);
- 90. }
- 91.
- 92. }
- 93. fn.undo=function(){
- 94. //var data=indicator.stack[indicator.stack.length-1];
- 95. //console.log(data);
- 96.
- 97. if(this.index===0){
- 98. return;
- 99. }else{
- 100. this.un=1;
- 101. this.virtualDo(this.index-=1);
- 102. }
- 103.
- 104. }
- 105. fn.virtualDo=function(){
- 106. var data=this.stack,i=0,len=this.index,temp;
- 107. for(;i<len;){
- 108. temp=data[i++];
- 109. temp[1].apply(undefined,temp[0]);
- 110. }
- 111. }
- 112.
- 113.
- 114. this.step=this.is(step)==='Number'? step : 10;
- 115. this.sn=this.sign();
- 116.
- 117. }
- 118.
- 119.
- 120.var a=MemoryDo(4);
- 121.var b=MemoryDo(2);
- 122.function doIt(o,fn){
- 123. a.dataBuffer(arguments);
- 124.
- 125. fn(arguments);
- 126. b.dataBuffer(arguments);
- 127.}
- 128.doIt({a:1,b:2,c:3},function(a){
- 129. console.dir(a);
- 130.});
- 131.doIt({b:2,c:3},function(a){
- 132. console.dir(a);
- 133.});
- 134.doIt({c:3},function(a){
- 135. console.dir(a);
- 136.});
- 137.doIt({d:4},function(a){
- 138. console.dir(a);
- 139.});
- 140.document.getElementById('a').onclick=function(){
- 141. a.undo();
- 142.}
- 143.document.getElementById('b').onclick=function(){
- 144. a.redo();
- 145.}
- 146.document.getElementById('c').onclick=function(){
- 147. b.undo();
- 148.}
- 149.document.getElementById('d').onclick=function(){
- 150. b.redo();
- 151.}
- 152.</script>
- 153.</body>
- 154.</html>
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免费注册
发表于 2011-12-09 17:17
