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js-Extensions-touchJS

js-Extensions-touchJS是一个非常简单的原生js touch扩展，用于适配移动端的常用touch操作（点击tab、双击dbTab、长按longPress、长按终止longPressCancel、滑动swipe以及具体滑动方向left right up down）

当前为 2022-11-30 提交的版本，查看 最新版本。

此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.cn-greasyfork.org/scripts/455704/1123115/js-Extensions-touchJS.js 

  1. // ==UserScript==
  2. // @name         js-Extensions-touchJS
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.4
  5. // @description  js-Extensions-touchJS是一个非常简单的原生js touch扩展，用于适配移动端的常用touch操作（点击tab、双击dbTab、长按longPress、长按终止longPressCancel、滑动swipe以及具体滑动方向left right up down）
  6. // @author       tutu辣么可爱(greasyfork)/IcedWatermelonJuice(github)
  7. // @grant        none
  8. // ==/UserScript==
  9. (function() {
  10. 	var touchJS = {}
  11.  
  12. 	function jsonExtend(json1 = {}, json2 = {}, json3 = {}) {
  13. 		return Object.assign(json1, json2, json3)
  14. 	}
  15.  
  16. 	function getFnName(fn) {
  17. 		if (fn.name) {
  18. 			return fn.name
  19. 		} else {
  20. 			var fnstr = fn.toString().match(/function\s*([^(]*)\(/);
  21. 			return fnstr ? fnstr[1] : null
  22. 		}
  23. 	}
  24. 	touchJS.bind = function(target, evt, fn, fnName = null) {
  25. 		if (!target || typeof target !== "object") {
  26. 			console.error("touchJS.bind(target, evt, fn, fnName)参数错误，对象(target)不存在");
  27. 			return false;
  28. 		}
  29. 		// 预处理
  30. 		var that = target;
  31. 		that.jsTouchFnMap = that.jsTouchFnMap ? that.jsTouchFnMap : {};
  32. 		var fnMap = jsonExtend({}, that.jsTouchFnMap),
  33. 			fnKeyArray = ["swipe", "left", "right", "up", "down", "tap", "dbTap", "longPress",
  34. 				"longPressCancel"
  35. 			]; //可用的事件名
  36.  
  37. 		function addFn(e, f, n) {
  38. 			if (fnKeyArray.indexOf(e) < 0) {
  39. 				let msg = "touchJS.bind(target, evt, fn, fnName)参数错误，指定事件(evt)不支持。支持的事件列表:";
  40. 				console.error(msg + fnKeyArray.toString());
  41. 				return false;
  42. 			}
  43. 			fnMap[e] = fnMap[e] ? fnMap[e] : {};
  44. 			if (!n) { //无方法名，获取并使用默认数字id
  45. 				defAry = Object.keys(fnMap[e]).filter((v) => {
  46. 					/^\d{1,}$/.test(v)
  47. 				});
  48. 				//获取可用数字id
  49. 				if (!fnMap[e][defAry.length]) { //假设id连续，长度就是新id
  50. 					n = defAry.length
  51. 				} else { //说明id不连续（手动删过事件方法），寻找中间缺少的id
  52. 					defAry.sort((a, b) => {
  53. 						return a - b
  54. 					});
  55. 					for (let i = 0; i < defAry.length; i++) {
  56. 						if (defAry[i] !== i) {
  57. 							n = i;
  58. 							break;
  59. 						}
  60. 					}
  61. 				}
  62. 			}
  63. 			fnMap[e][n] = f
  64. 			return true
  65. 		}
  66. 		if (typeof evt === "string" && typeof fn === "function") {
  67. 			if (!addFn(evt, fn, fnName ? fnName : getFnName(fn))) {
  68. 				return false
  69. 			}
  70. 		} else if (typeof evt === "object" && !fn) {
  71. 			for (let e in evt) {
  72. 				if (!addFn(e, evt[e], getFnName(evt[e]))) {
  73. 					return false
  74. 				}
  75. 			}
  76. 		}
  77. 		that.jsTouchFnMap = jsonExtend({}, that.jsTouchFnMap, fnMap);
  78. 		//添加事件
  79. 		if (!that.jsTouchFnMap.eventLoaded) {
  80. 			that.jsTouchFnMap.eventLoaded = true;
  81. 			var execFn = function(evt) { //执行方法
  82. 				if (!evt) {
  83. 					return false
  84. 				}
  85. 				if (/left|right|up|down/.test(evt)) {
  86. 					evt = [evt, "swipe"];
  87. 				} else {
  88. 					evt = [evt];
  89. 				}
  90. 				evt.forEach((e) => {
  91. 					e = that.jsTouchFnMap[e] ? that.jsTouchFnMap[e] : {};
  92. 					for (let i in e) {
  93. 						if (typeof e[i] === "function") {
  94. 							e[i]();
  95. 						}
  96. 					}
  97. 				})
  98. 			}
  99. 			var lp_timer = -1,
  100. 				tap_timer = -1,
  101. 				lp_flag = false,
  102. 				swipe_flag = false,
  103. 				tap_sum = 0,
  104. 				pos = {
  105. 					x: 0,
  106. 					y: 0
  107. 				};
  108. 			that.addEventListener('touchstart', ts, false);
  109. 			that.addEventListener('touchmove', tm, false);
  110. 			that.addEventListener('touchend', te, false);
  111. 			//具体实现
  112. 			function dir(past, now) { //判方向
  113. 				if (Math.abs(past.x - now.x) > Math.abs(past.y - now.y)) {
  114. 					if (now.x > past.x) {
  115. 						return "right"
  116. 					} else {
  117. 						return "left"
  118. 					}
  119. 				} else {
  120. 					if (now.y > past.y) {
  121. 						return "down"
  122. 					} else {
  123. 						return "up"
  124. 					}
  125. 				}
  126. 				return null
  127. 			}
  128.  
  129. 			function ts(e) { //touchstart
  130. 				e = e || window.event
  131. 				lp_timer !== -1 && clearTimeout(lp_timer);
  132. 				lp_timer = -1;
  133. 				lp_flag = false;
  134. 				swipe_flag = false;
  135. 				pos = {
  136. 					x: e.changedTouches[0].clientX,
  137. 					y: e.changedTouches[0].clientY
  138. 				}
  139. 				lp_timer = setTimeout(function() {
  140. 					if (!swipe_flag) {
  141. 						lp_timer = -1;
  142. 						lp_flag = true;
  143. 						execFn("longPress")
  144. 					}
  145. 				}, 600)
  146. 			}
  147.  
  148. 			function tm(e) { //touchmove
  149. 				var e = e || window.event;
  150. 				let temp = {
  151. 					x: e.changedTouches[0].clientX,
  152. 					y: e.changedTouches[0].clientY
  153. 				}
  154. 				if (!lp_flag && (Math.abs(pos.x - temp.x) > 10 || Math.abs(pos.y - temp.y) > 10)) {
  155. 					swipe_flag = true;
  156. 					lp_timer !== -1 && clearTimeout(lp_timer);
  157. 					lp_timer = -1;
  158. 					execFn(dir(pos, temp));
  159. 				}
  160. 			}
  161.  
  162. 			function te(e) { //touchend
  163. 				var e = e || window.event;
  164. 				lp_timer !== -1 && clearTimeout(lp_timer);
  165. 				tap_timer !== -1 && clearTimeout(tap_timer);
  166. 				lp_timer = -1;
  167. 				tap_timer = -1;
  168. 				if (lp_flag) {
  169. 					execFn("longPressCancel");
  170. 				} else if (!swipe_flag) {
  171. 					tap_sum += 1;
  172. 					if (tap_sum >= 2) {
  173. 						tap_sum = 0;
  174. 						execFn("dbTap");
  175. 					} else {
  176. 						tap_timer = setTimeout(() => {
  177. 							tap_sum = 0;
  178. 							execFn("tap");
  179. 						}, 200)
  180. 					}
  181. 				}
  182. 			}
  183. 		}
  184. 		return that
  185. 	}
  186. 	touchJS.unbind = function(target, evt, fnName = null) {
  187. 		if (!target || typeof target !== "object") {
  188. 			console.error("touchJS.unbind(target, evt, fnName)参数错误，对象(target)不存在");
  189. 			return false;
  190. 		}
  191. 		var that = target;
  192. 		if (typeof evt === "string") {
  193. 			that.jsTouchFnMap = that.jsTouchFnMap ? that.jsTouchFnMap : {};
  194. 			if (that.jsTouchFnMap[evt]) {
  195. 				if (fnName) {
  196. 					fnName = typeof fnName === "function" ? getFnName(fnName) : fnName;
  197. 					delete that.jsTouchFnMap[evt][fnName];
  198. 				} else {
  199. 					delete that.jsTouchFnMap[evt]
  200. 				}
  201. 			}
  202. 		}
  203. 		return that
  204. 	}
  205. 	window.touchJS=touchJS;
  206. })();