文章目录
- 教程原始来源
- 责任声明
- 概要
- 1. 准备
- 2. 获取插件源代码
- 3.查看\修改插件源代码
- 4.修改源码，复制到AMap3.js结尾
- 5.测试
- 其它插件
- 部分插件代码
教程原始来源
此教程是基于 “深海的鲸同学 luvi”的 高德地图离线加载解决方案（内网部署）+本地地图瓦片加载 文章改进的，增加了自定义插件部分
责任声明
本教程旨在提供关于如何离线部署高德地图的技术信息和指导，仅供教育和个人学习目的。本教程中使用的高德地图API及其相关技术、图标和标识等均属于高德地图及其关联公司的财产。所有相关技术和标识的使用都应遵循高德地图提供的官方文档和版权声明。本教程或作者不拥有任何高德地图API或相关技术的权益，且本教程未经高德地图官方认可或直接支持。如需商用，请联系高德地图官方。
概要
最近在研究高德地图API相关使用，发现只有WEBJS的离线部署不被支持，所以在网上查询了一些相关教程，但是并不全面。上文提到的教程中包含了基本的离线API部署方案，但Plugin无法使用，于是自己研究了一下，出一个简单的插件集成教程。
1. 准备
请按照 “深海的鲸同学 luvi”的 高德地图离线加载解决方案（内网部署）+本地地图瓦片加载 教程先部署离线js
2. 获取插件源代码
在线获取的插件保存在localStorage，所以在 在线地图的页面查看F12–应用–本地存储空间，找到要用的插件
3.查看\修改插件源代码
可以将script内的内容复制到 编译器
把所有的 “\” 替换为 “” （空字符串）:
然后格式化一下，查看有没有与在线相关的代码并进行适当修改，这里展示开头和结尾的格式：
4.修改源码，复制到AMap3.js结尾
改完代码后可以使用一些工具压缩一下代码，如 https://www.toptal.com/developers/javascript-minifier
随后按照：
_jsload_('AMap.RangingTool', '! function(){ .... }();')
的格式修改代码。开头和结尾示例如下：
5.测试
随后在页面直接使用插件：
measureDistance(){
this.ruler = new AMap.RangingTool(this.mapObj);
this.ruler.turnOn();
}
查看控制台没有发现报错，且功能使用正常。
其它插件
后面测试了ToolBar、Scale，发现均能正常使用。
插件引入到AMap3.js的方法是一样的。
const toolBar = new AMap.ToolBar({
position: {
top: '110px',
right: '40px'
}
})
const scale = new AMap.Scale();
this.mapObj.addControl(toolBar);
this.mapObj.addControl(scale);
部分插件代码
下面是Toolbar、scale、rangingtool的代码，可以直接粘贴到AMap3.js结尾：
_jsload_('AMap.ToolBar', '! function toolbar(){"use strict";var o=function(t,n){return(o=Object.setPrototypeOf||({__proto__:[]})instanceof Array&&function(o,t){o.__proto__=t}||function(o,t){for(var n in t)t.hasOwnProperty(n)&&(o[n]=t[n])})(t,n)},t=[2,26],n={position:{bottom:"20px",right:"20px"},offset:[15,15]},e=function(e){function i(o){void 0===o&&(o=n);var t=e.call(this,o)||this;return t._className="toolbar",t._handleZoomEnd=t._handleZoomEnd.bind(t),t._config=AMap.extend(n,o),t.initContainer(),t._initUI(),t}return!function t(n,e){function i(){this.constructor=n}o(n,e),n.prototype=null===e?Object.create(e):(i.prototype=e.prototype,new i)}(i,e),i.prototype.addTo=function(o){e.prototype.addTo.call(this,o),this._handleZoomEnd(),o.on("zoomend",this._handleZoomEnd)},i.prototype.remove=function(){this.map&&this.map.off("zoomend",this._handleZoomEnd),e.prototype.remove.call(this)},i.prototype.removeFrom=function(o){o&&o.off("zoomend",this._handleZoomEnd),e.prototype.removeFrom.call(this,o)},i.prototype._handleZoomEnd=function(){var o=this.map,t=o.getZooms();o.getZoom()<=t[0]?this._zoomOut.style.color="#ddd":this._zoomOut.style.color="#000",o.getZoom()>=t[1]?this._zoomIn.style.color="#ddd":this._zoomIn.style.color="#000"},i.prototype._initUI=function(){var o=this;this._zoomIn=AMap.DomUtil.create("span",this._container,"amap-ctrl-zoomin"),this._zoomOut=AMap.DomUtil.create("span",this._container,"amap-ctrl-zoomout"),this._zoomIn.innerHTML="+",this._zoomOut.innerHTML="-",this._zoomIn.setAttribute("data-type","add"),this._zoomOut.setAttribute("data-type","sub"),this._container.addEventListener("click",function(n){if(n.target instanceof HTMLElement){var e=n.target.getAttribute("data-type"),i=o.map.getZoom();"add"===e?o.map.setZoom(Math.min(i+1,t[1])):"sub"===e&&o.map.setZoom(Math.max(i-1,2))}})},i}(AMap.Control);AMap.ToolBar=e}();')
_jsload_('AMap.Scale', '! function scale(){"use strict";var e=function(t,i){return(e=Object.setPrototypeOf||({__proto__:[]})instanceof Array&&function(e,t){e.__proto__=t}||function(e,t){for(var i in t)t.hasOwnProperty(i)&&(e[i]=t[i])})(t,i)},t={position:"LB",offset:[15,25]},i=function(i){function n(e){void 0===e&&(e=t);var n=i.call(this,e)||this;return n._className="scalecontrol",n._scaleLevel=[[1e7,"10000"],[5e6,"5000"],[2e6,"2000"],[1e6,"1000"],[5e5,"500"],[2e5,"200"],[1e5,"100"],[5e4,"50"],[3e4,"30"],[2e4,"20"],[1e4,"10"],[5e3,"5"],[2e3,"2"],[1e3,"1"],[500,"500"],[200,"200"],[100,"100"],[50,"50"],[25,"25"],[10,"10"],[5,"5"],[2,"2"],[1,"1"],[.5,"50"],[.2,"20"],[.1,"10"],[.05,"5"],[.02,"2"],[.01,"1"],[.01,"1"],[.01,"1"]],n._handleViewChange=n._handleViewChange.bind(n),n._config=AMap.extend(t,e),n.initContainer(),n}return!function t(i,n){function o(){this.constructor=i}e(i,n),i.prototype=null===n?Object.create(n):(o.prototype=n.prototype,new o)}(n,i),n.prototype.addTo=function(e){i.prototype.addTo.call(this,e),this._initUI(),e.on("viewchange",this._handleViewChange)},n.prototype.remove=function(){this.map&&this.map.off("viewchange",this._handleViewChange),this._destroyUI(),i.prototype.remove.call(this)},n.prototype.removeFrom=function(e){e&&e.off("viewchange",this._handleViewChange),this._destroyUI(),i.prototype.removeFrom.call(this,e)},n.prototype._handleViewChange=function(){this._updateUI()},n.prototype._initUI=function(){this._text=AMap.DomUtil.create("div",this._container,"amap-scale-text"),this._line=AMap.DomUtil.create("div",this._container,"amap-scale-line"),this._lineLeft=AMap.DomUtil.create("div",this._container,"amap-scale-edgeleft"),this._lineRight=AMap.DomUtil.create("div",this._container,"amap-scale-edgeright"),this._lineMid=AMap.DomUtil.create("div",this._container,"amap-scale-middle"),this._line.appendChild(this._lineLeft),this._line.appendChild(this._lineMid),this._line.appendChild(this._lineRight),this._updateUI()},n.prototype._destroyUI=function(){for(;this._container.firstChild;)this._container.removeChild(this._container.firstChild)},n.prototype._updateUI=function(){var e=this.map.getView().getStatus(),t=e.optimalZoom,i=e.center,n=e.resolution;this.map.getSize().toArray();for(var o=t-1,a=n*Math.cos(i[1]/180*Math.PI),s=this._scaleLevel[o][0]/a,h=o;h<this._scaleLevel.length&&!((s=this._scaleLevel[o][0]/a)<120);h++)o=Math.min(++o,this._scaleLevel.length-1);var l=this._scaleLevel[o][1];o<=13?l+=" 公里":o<23?l+=" 米":l+=" 厘米",this._text.innerText=l,this._text.style.width=s+8+"px",this._lineMid.style.width=s+"px",this._lineRight.style.left=s+1+"px"},n}(AMap.Control);AMap.Scale=i}(); ')
_jsload_('AMap.RangingTool', '!function () {' +
' "use strict";' +
' var extendStatics = function (d, b) {' +
' extendStatics = Object.setPrototypeOf || {__proto__: []} instanceof Array && function (d, b) {' +
' d.__proto__ = b' +
' } || function (d, b) {' +
' for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]' +
' };' +
' return extendStatics(d, b)' +
' };' +
'' +
' function __extends(d, b) {' +
' extendStatics(d, b);' +
'' +
' function __() {' +
' this.constructor = d' +
' }' +
'' +
' d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __)' +
' }' +
'' +
' var RangingTool = function (_super) {' +
' __extends(RangingTool, _super);' +
'' +
' function RangingTool(map, opts) {' +
' var _this = _super.call(this) || this;' +
' _this["CLASS_NAME"] = "AMap.RangingTool";' +
' _this.STATUS = {OFF: 0, READY: 1, WORKING: 2};' +
' if (!map) {' +
' throw new Error("创建AMap.RangingTool实例必须传入地图对象作为第一个参数: new AMap.RangingTool(mapObj);")' +
' }' +
' _this._map = map;' +
' _this._container = _this._map.getMapsContainer();' +
' opts = opts || {};' +
' var imgHost = AMap.getConfig()["protocol"] + "://webapi.amap.com";' +
' var nodeImg = imgHost + "/images/pldot.png";' +
' var nodeSize = new AMap.Size(12, 12);' +
' var nodeOptionsArray = [];' +
' var lineOptions = {' +
' strokeColor: "#1791fc",' +
' strokeOpacity: .8,' +
' strokeWeight: 2,' +
' bubble: true,' +
' draggable: false,' +
' innerOverlay: true' +
' };' +
' _this._keydownEvent = _this._onKeyDown.bind(_this);' +
' var labelOffset = new AMap.Pixel(-6, 6);' +
' for (var i = 0; i < 3; i += 1) {' +
' nodeOptionsArray.push({' +
' icon: new AMap.Icon({' +
' size: nodeSize,' +
' imageOffset: new AMap.Pixel(-12 * i, 0),' +
' image: nodeImg' +
' }),' +
' anchor: "top-left",' +
' offset: [-6, -6],' +
' cursor: "pointer",' +
' bubble: true,' +
' draggable: false,' +
' zIndex: 120,' +
' innerOverlay: true' +
' })' +
' }' +
' _this["startMarkerOptions"] = nodeOptionsArray[0];' +
' _this["midMarkerOptions"] = nodeOptionsArray[2];' +
' _this["endMarkerOptions"] = nodeOptionsArray[1];' +
' _this["lineOptions"] = _this["tmpLineOptions"] = lineOptions;' +
' _this["startLabelText"] = "起点</div>";' +
' _this["midLabelText"] = "{d}公里</div>";' +
' _this["endLabelText"] = "共{d}公里</div>";' +
' _this["startLabelOffset"] = _this["midLabelOffset"] = _this["endLabelOffset"] = labelOffset;' +
' _this.keyboardEve = false;' +
' _this.d = 1e3;' +
' if (opts["d"] === 1) {' +
' _this.d = 1;' +
' _this["midLabelText"] = "{d}米</div>";' +
' _this["endLabelText"] = "共{d}米</div>"' +
' }' +
' _this.dn = "<img class=\'deleteNode\' src=\'" + imgHost + "/images/remove.png\' />";' +
' _this.dl = "<img class=\'delimg\' src=\'" + imgHost + "/images/destroy.png\' />";' +
' _this.merge(_this, opts);' +
' _this._lastRecord = null;' +
' _this._status = _this.STATUS.OFF;' +
' return _this' +
' }' +
'' +
' RangingTool.prototype["turnOn"] = function () {' +
' if (this._status === this.STATUS.OFF) {' +
' this._off2Ready();' +
' this._cacheDoubleClickZoom = this._map["getStatus"]()["doubleClickZoom"];' +
' this._map["setStatus"]({doubleClickZoom: false})' +
' }' +
' };' +
' RangingTool.prototype["turnOff"] = function (removeOverlays) {' +
' if (this._status === this.STATUS.READY) {' +
' this._ready2Off();' +
' this._map["setStatus"]({doubleClickZoom: this._cacheDoubleClickZoom})' +
' } else if (this._status === this.STATUS.WORKING) {' +
' this._onEnd();' +
' this._working2Off();' +
' this._map["setStatus"]({doubleClickZoom: this._cacheDoubleClickZoom})' +
' }' +
' if (removeOverlays) {' +
' this._removeAllRecords()' +
' }' +
' };' +
' RangingTool.prototype.setOptions = function (opts) {' +
' this.merge(this, opts)' +
' };' +
' RangingTool.prototype.merge = function (obj1, obj2) {' +
' for (var i in obj2) {' +
' if (obj2.hasOwnProperty(i)) {' +
' obj1[i] = obj2[i];' +
' if (i === "tmpLineOptions" || i === "lineOptions") {' +
' obj1[i]["bubble"] = true' +
' }' +
' }' +
' }' +
' };' +
' RangingTool.prototype.updateOptions = function (marker, options) {' +
' var setting = {' +
' position: [undefined, "setPosition"],' +
' draggable: [false, "setDraggable"],' +
' content: [undefined, "setContent"],' +
' icon: [undefined, "setIcon"],' +
' offset: [undefined, "setOffset"],' +
' zIndex: [100, "setzIndex"]' +
' };' +
' for (var key in setting) {' +
' if (setting.hasOwnProperty(key)) {' +
' var value = options[key] || setting[key][0];' +
' if (value !== undefined) {' +
' marker[setting[key][1]](value)' +
' }' +
' }' +
' }' +
' };' +
' RangingTool.prototype._off2Ready = function () {' +
' this._map.on("click", this._onStart, this, true);' +
' this._status = this.STATUS.READY' +
' };' +
' RangingTool.prototype._ready2Off = function () {' +
' this._map.off("click", this._onStart, this);' +
' this._status = this.STATUS.OFF' +
' };' +
' RangingTool.prototype._ready2Working = function () {' +
' this._map.on("click", this._onAddNode, this);' +
' this._map.on("mousemove", this._onMouseMove, this);' +
' this._map.on("rightclick", this._onEnd, this, true);' +
' this._map.on("dblclick", this._onEnd, this, true);' +
' this._container.addEventListener("keydown", this._keydownEvent);' +
' this._status = this.STATUS.WORKING' +
' };' +
' RangingTool.prototype._working2Off = function () {' +
' this._map.off("click", this._onStart, this);' +
' this._map.off("click", this._onAddNode, this);' +
' this._map.off("mousemove", this._onMouseMove, this);' +
' this._map.off("rightclick", this._onEnd, this);' +
' this._map.off("dblclick", this._onEnd, this, true);' +
' this._container.removeEventListener("keydown", this._keydownEvent);' +
' this._status = this.STATUS.OFF' +
' };' +
' RangingTool.prototype._working2Ready = function () {' +
' this._working2Off();' +
' this._off2Ready();' +
' this._status = this.STATUS.READY' +
' };' +
' RangingTool.prototype._onStart = function (e) {' +
' this._map["setStatus"]({allBubble: true});' +
' var record = {prev: this._lastRecord};' +
' var node = {_position: e["lnglat"], _marker: null};' +
' record._lastNode = node;' +
' if (this._lastRecord) {' +
' this._lastRecord.next = record' +
' }' +
' this.originDraggable = this._map["getStatus"]()["dragEnable"];' +
' this._map["setStatus"]({dragEnable: false});' +
' this._lastRecord = record;' +
' this._renderMarker(node, this["startMarkerOptions"]);' +
' this._renderLabel(node, this["startLabelText"], this["startLabelOffset"], this._getRemoveNodeFunction(node, record));' +
' this._ready2Working();' +
' var addnodeEvent = {position: e["lnglat"], marker: node._marker};' +
' this.emit("addnode", addnodeEvent)' +
' };' +
' RangingTool.prototype._onAddNode = function (e) {' +
' var record = this._lastRecord;' +
' var prevNode = record._lastNode;' +
' var newNode = {_position: e["lnglat"], prev: prevNode, _marker: null};' +
' if (prevNode && prevNode._position.equals(e["lnglat"])) {' +
' this._onEnd();' +
' return' +
' }' +
' prevNode.next = newNode;' +
' record._lastNode = newNode;' +
' this._renderMarker(newNode, this["midMarkerOptions"]);' +
' this._renderLabel(newNode, this["midLabelText"], this["midLabelOffset"], this._getRemoveNodeFunction(newNode, record));' +
' this._renderLine(record);' +
' if (this._tmpLine) {' +
' this._tmpLine["setPath"]([e["lnglat"], e["lnglat"]])' +
' }' +
' var addnodeEvent = {position: e["lnglat"], marker: newNode._marker};' +
' this.emit("addnode", addnodeEvent)' +
' };' +
' RangingTool.prototype._onMouseMove = function (e) {' +
' var record = this._lastRecord;' +
' var position = record._lastNode._position;' +
' if (!this._tmpLine) {' +
' this._tmpLine = new AMap.Polyline(this["tmpLineOptions"]);' +
' this._tmpLine.name = "tmpLine";' +
' this._map.add(this._tmpLine)' +
' }' +
' this._tmpLine.isOfficial = true;' +
' this._tmpLine["setPath"]([position, e["lnglat"]]);' +
' var distance = this._tmpLine["getLength"]();' +
' if (record._line) {' +
' distance += record._line["getLength"]()' +
' }' +
' var moveEvent = {position: e["lnglat"], distance: distance, target: this};' +
' this.emit("move", moveEvent)' +
' };' +
' RangingTool.prototype._onKeyDown = function (e) {' +
' if (e.keyCode === 27) {' +
' this._onEnd()' +
' }' +
' };' +
' RangingTool.prototype._onEnd = function () {' +
' var record = this._lastRecord;' +
' var node = record && record._lastNode;' +
' this._map["setStatus"]({allBubble: false, dragEnable: this.originDraggable});' +
' this["endMarkerOptions"]["bubble"] = false;' +
' if (node && node.prev) {' +
' this._renderMarker(node, this["endMarkerOptions"]);' +
' this._renderLabel(node, this["endLabelText"], this["endLabelOffset"], this._getRemoveNodeFunction(node, record), this._getRemoveRecordFunction(record))' +
' } else if (record) {' +
' this._removeRecord(record)' +
' }' +
' this._working2Ready();' +
' if (this._tmpLine) {' +
' this._map.remove(this._tmpLine);' +
' this._tmpLine = null' +
' }' +
' if (record && record._line) {' +
' record._line["setOptions"]({bubble: false});' +
' var endEvent = {' +
' polyline: record._line,' +
' points: record._line["getPath"](),' +
' distance: record._line["getLength"]()' +
' };' +
' this.emit("end", endEvent)' +
' } else {' +
' this.emit("cancel", {obj: false})' +
' }' +
' };' +
' RangingTool.prototype._renderLine = function (record) {' +
' var path = [];' +
' var cur = record._lastNode;' +
' while (cur) {' +
' path.unshift(cur._position);' +
' cur = cur.prev' +
' }' +
' if (path.length < 2) {' +
' this._removeRecord(record)' +
' } else {' +
' if (record._line) {' +
' record._line["setPath"](path)' +
' } else {' +
' record._line = new AMap.Polyline(this["lineOptions"]);' +
' record._line.isOfficial = true;' +
' record._line.name = "recrdLine";' +
' record._line["setPath"](path);' +
' this._map.add(record._line)' +
' }' +
' }' +
' };' +
' RangingTool.prototype._renderMarker = function (node, options) {' +
' var isNew = !node._marker;' +
' var map = this._map;' +
' this.merge(options, {position: node._position, bubble: true, innerOverlay: true});' +
' if (!isNew) {' +
' this.updateOptions(node._marker, options)' +
' } else {' +
' node._marker = new AMap.Marker(options);' +
' node._marker.name = "marker";' +
' this._map.add(node._marker);' +
' node._marker.isOfficial = true' +
' }' +
' };' +
' RangingTool.prototype._renderLabel = function (node, text, offset, dnCallback, dlCallback) {' +
' var content = document.createElement("div");' +
' var d = 0;' +
' if (node._label) {' +
' this._map.remove(node._label);' +
' delete node._label' +
' }' +
' if (text.match("{d}")) {' +
' var cur = node.prev;' +
' while (cur) {' +
' var dis = AMap.GeometryUtil.distance(cur._position, cur.next._position);' +
' d += dis;' +
' cur = cur.prev' +
' }' +
' d = (d / this.d).toFixed(this.d === 1 ? 1 : 2);' +
' text = text.replace("{d}", d)' +
' }' +
' content.className = "amap-ranging-label";' +
' var span = document.createElement("span");' +
' span.innerHTML = text;' +
' content.appendChild(span);' +
' if (dnCallback) {' +
' content.appendChild(this._getSmallButton(this.dn, dnCallback))' +
' }' +
' if (dlCallback) {' +
' content.appendChild(this._getSmallButton(this.dl, dlCallback))' +
' }' +
' node._label = new AMap.Marker({' +
' content: content,' +
' position: node._position,' +
' offset: offset,' +
' cursor: "pointer",' +
' zIndex: 110,' +
' bubble: false' +
' });' +
' node._label.isOfficial = true;' +
' node._marker.name = "label";' +
' this._map.add(node._label)' +
' };' +
' RangingTool.prototype._updateLabels = function (record) {' +
' var cur = record._lastNode;' +
' if (cur) {' +
' this._renderLabel(cur, this["endLabelText"], this["endLabelOffset"], this._getRemoveNodeFunction(cur, record), this._getRemoveRecordFunction(record));' +
' while (cur.prev) {' +
' cur = cur.prev;' +
' this._renderLabel(cur, this["midLabelText"], this["midLabelOffset"], this._getRemoveNodeFunction(cur, record))' +
' }' +
' this._renderLabel(cur, this["startLabelText"], this["startLabelOffset"], this._getRemoveNodeFunction(cur, record))' +
' }' +
' };' +
' RangingTool.prototype._getSmallButton = function (html, callback) {' +
' var button = document.createElement("span");' +
' button.innerHTML = html;' +
' button.addEventListener("click", function (e) {' +
' callback()' +
' });' +
' button.addEventListener("mousedown", function (e) {' +
' e.stopPropagation()' +
' });' +
' return button' +
' };' +
' RangingTool.prototype._getRemoveNodeFunction = function (node, record) {' +
' var _this = this;' +
' var removeNodeFun = function () {' +
' if (_this._status !== _this.STATUS.WORKING) {' +
' _this._removeNode(node, record)' +
' }' +
' };' +
' return removeNodeFun' +
' };' +
' RangingTool.prototype._getRemoveRecordFunction = function (record) {' +
' var self = this;' +
' return function (e) {' +
' if (self._status !== self.STATUS.WORKING) {' +
' self.emit("delete", {target: self});' +
' self._removeRecord(record)' +
' }' +
' }' +
' };' +
' RangingTool.prototype._removeNode = function (node, record) {' +
' if (node.prev) {' +
' node.prev.next = node.next' +
' } else if (node.next) {' +
' this._renderMarker(node.next, this["startMarkerOptions"])' +
' }' +
' if (node.next) {' +
' node.next.prev = node.prev' +
' } else if (node.prev) {' +
' this._renderMarker(node.prev, this["endMarkerOptions"]);' +
' record._lastNode = node.prev' +
' }' +
' node.prev = node.next = null;' +
' if (node._marker) {' +
' this._map.remove(node._marker);' +
' node._marker = null' +
' }' +
' if (node._label) {' +
' this._map.remove(node._label);' +
' node._label = null' +
' }' +
' this._renderLine(record);' +
' this._updateLabels(record);' +
' var removenodeEvent = {' +
' polyline: record._line,' +
' points: record._line ? record._line["getPath"]() : [],' +
' distance: record._line ? record._line["getLength"]() : null,' +
' target: this' +
' };' +
' this.emit("removenode", removenodeEvent)' +
' };' +
' RangingTool.prototype._removeRecord = function (record) {' +
' var node = record._lastNode;' +
' if (record._line) {' +
' this._map.remove(record._line);' +
' record._line = null' +
' }' +
' while (node) {' +
' if (node._marker) {' +
' this._map.remove(node._marker);' +
' node._marker = null' +
' }' +
' if (node._label) {' +
' this._map.remove(node._label);' +
' node._label = null' +
' }' +
' node = node.prev' +
' }' +
' if (record.prev) {' +
' record.prev.next = record.next' +
' }' +
' if (record.next) {' +
' record.next.prev = record.prev' +
' } else {' +
' this._lastRecord = record.prev' +
' }' +
' record._lastNode = record.prev = record.next = null' +
' };' +
' RangingTool.prototype._removeAllRecords = function () {' +
' while (this._lastRecord) {' +
' this._removeRecord(this._lastRecord)' +
' }' +
' };' +
' return RangingTool' +
' }(AMap.Event);' +
' AMap["RangingTool"] = RangingTool' +
'}();' )
