☰

Interval Looper

非同步数组枚举回调

此脚本不应直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.gf.qytechs.cn/scripts/3588/10916/Interval%20Looper.js 

  1. // Interval Looper by Jixun:
  2. // https://gist.github.com/JixunMoe/c77bb3936a68997fce22
  3.  
  4. var IntervalLoop = function (arrData, looper, delay) {
  5. 	if (!(this instanceof IntervalLoop))
  6. 		return new IntervalLoop (arrData, looper, delay);
  7.  
  8. 	/**
  9. 	 * Status
  10. 	 * @type Number
  11. 	 * 0: 循环未开始
  12. 	 * 1: 正在循环
  13. 	 * 2: 循环结束
  14. 	 */
  15. 	this.status = 0;
  16. 	this.next = this._next.bind (this);
  17. 	this.index = 0;
  18.  
  19. 	this.setDelay (delay || 50);
  20. 	this.data = (arrData instanceof Array) ? arrData : [];
  21. 	this.setLooper (looper);
  22. };
  23.  
  24. IntervalLoop.prototype = {
  25. 	_getDelay: function () {
  26. 		if (!this.delay)
  27. 			return 50;
  28.  
  29. 		if (this.delay.apply)
  30. 			return this.delay();
  31.  
  32. 		return this.delay;
  33. 	},
  34. 	_next: function () {
  35. 		// 状态改为 进行中
  36. 		this.status = 1;
  37. 		if (this.index < this.data.length) {
  38. 			setTimeout (this.looper.bind(this, this.data[this.index]), this.delay);
  39. 			this.index ++;
  40. 			if (this.onProgress && this.onProgress.apply) {
  41. 				try {
  42. 					this.onProgress (this.index, this.data.length);
  43. 				} catch (e) {
  44. 					console.error ('Error while callback to `onProgress`');
  45. 					console.error (e);
  46. 				}
  47. 			}
  48. 		} else {
  49. 			this.status = 2;
  50. 			if (this.onComplete && this.onComplete.apply) {
  51. 				try {
  52. 					this.onComplete (this.data.length);
  53. 				} catch (e) {
  54. 					console.error ('Error while callback to `onComplete`');
  55. 					console.error (e);
  56. 				}
  57. 			}
  58. 		}
  59. 	},
  60. 	cleanup: function () {
  61. 		if (this.status == 2) {
  62. 			// 已经用过的数据就清掉。
  63. 			this.data.splice(0, this.index);
  64. 			this.index = 0;
  65. 			this.status = 0;
  66. 		}
  67.  
  68. 		return this;
  69. 	},
  70. 	add: function () {
  71. 		if (arguments.length > 0) {
  72. 			// 将所有参数作为数据推入 this.data
  73. 			for (var i = 0; i<arguments.length; i++)
  74. 				this.data.push (arguments[i]);
  75.  
  76. 			// 整个组已经完结，清理后自动继续
  77. 			if (this.status == 2)
  78. 				this.cleanup().next();
  79. 		}
  80.  
  81. 		// 连锁
  82. 		return this;
  83. 	},
  84. 	setDelay: function (newDelay) {
  85. 		if (newDelay) this.delay = parseInt (newDelay);
  86. 		return this;
  87. 	},
  88. 	setLooper: function (fooCallback) {
  89. 		if (fooCallback && fooCallback.apply)
  90. 			this.looper = fooCallback.bind(this, this.next);
  91.  
  92. 		return this;
  93. 	},
  94. 	loop: function () {
  95. 		if (this.status == 0)
  96. 			// 尚未启动, 从头开始
  97. 			this.next ();
  98.  
  99. 		return this;
  100. 	}
  101. };

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