From e4be7a095f31b76d4f3d60c06eefe774ffd264fc Mon Sep 17 00:00:00 2001
From: liuyg <liuyg@qq.com>
Date: Wed, 16 Mar 2022 16:20:18 +0800
Subject: [PATCH] +地图添加面  电子围栏

---
 src/components/map/Draw.js | 2165 +++++++++++++++++++++++++++++++---------------------------
 1 files changed, 1,158 insertions(+), 1,007 deletions(-)

diff --git a/src/components/map/Draw.js b/src/components/map/Draw.js
index d49eda4..6c95d33 100644
--- a/src/components/map/Draw.js
+++ b/src/components/map/Draw.js
@@ -1,57 +1,97 @@
-var __extends = (this && this.__extends) || (function() {
-    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 (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
-        return extendStatics(d, b);
+var __extends =
+  (this && this.__extends) ||
+  (function () {
+    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 (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p];
+        };
+      return extendStatics(d, b);
     };
-    return function(d, b) {
-        if (typeof b !== "function" && b !== null)
-            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
-        extendStatics(d, b);
+    return function (d, b) {
+      if (typeof b !== "function" && b !== null)
+        throw new TypeError(
+          "Class extends value " + String(b) + " is not a constructor or null"
+        );
+      extendStatics(d, b);
 
-        function __() { this.constructor = d; }
-        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+      function __() {
+        this.constructor = d;
+      }
+      d.prototype =
+        b === null ?
+        Object.create(b) :
+        ((__.prototype = b.prototype), new __());
     };
-})();
+  })();
 /**
  * @module ol/interaction/Draw
  */
-import Circle from 'ol/geom/Circle.js';
-import Event from 'ol/events/Event.js';
-import EventType from 'ol/events/EventType.js';
-import Feature from 'ol/Feature.js';
-import GeometryType from 'ol/geom/GeometryType.js';
-import InteractionProperty from 'ol/interaction/Property.js';
-import LineString from 'ol/geom/LineString.js';
-import MapBrowserEvent from 'ol/MapBrowserEvent.js';
-import MapBrowserEventType from 'ol/MapBrowserEventType.js';
-import MultiLineString from 'ol/geom/MultiLineString.js';
-import MultiPoint from 'ol/geom/MultiPoint.js';
-import MultiPolygon from 'ol/geom/MultiPolygon.js';
-import Point from 'ol/geom/Point.js';
-import PointerInteraction from 'ol/interaction/Pointer.js';
-import Polygon, { fromCircle, makeRegular } from 'ol/geom/Polygon.js';
-import VectorLayer from 'ol/layer/Vector.js';
-import VectorSource from 'ol/source/Vector.js';
-import { FALSE, TRUE } from 'ol/functions.js';
-import { always, noModifierKeys, shiftKeyOnly } from 'ol/events/condition.js';
-import { boundingExtent, getBottomLeft, getBottomRight, getTopLeft, getTopRight, } from 'ol/extent.js';
-import { createEditingStyle } from 'ol/style/Style.js';
-import { fromUserCoordinate, getUserProjection } from 'ol/proj.js';
-import { squaredDistance as squaredCoordinateDistance } from 'ol/coordinate.js';
+import Circle from "ol/geom/Circle.js";
+import Event from "ol/events/Event.js";
+import EventType from "ol/events/EventType.js";
+import Feature from "ol/Feature.js";
+import GeometryType from "ol/geom/GeometryType.js";
+import InteractionProperty from "ol/interaction/Property.js";
+import LineString from "ol/geom/LineString.js";
+import MapBrowserEvent from "ol/MapBrowserEvent.js";
+import MapBrowserEventType from "ol/MapBrowserEventType.js";
+import MultiLineString from "ol/geom/MultiLineString.js";
+import MultiPoint from "ol/geom/MultiPoint.js";
+import MultiPolygon from "ol/geom/MultiPolygon.js";
+import Point from "ol/geom/Point.js";
+import PointerInteraction from "ol/interaction/Pointer.js";
+import Polygon, {
+  fromCircle,
+  makeRegular
+} from "ol/geom/Polygon.js";
+import VectorLayer from "ol/layer/Vector.js";
+import VectorSource from "ol/source/Vector.js";
+import {
+  FALSE,
+  TRUE
+} from "ol/functions.js";
+import {
+  always,
+  noModifierKeys,
+  shiftKeyOnly
+} from "ol/events/condition.js";
+import {
+  boundingExtent,
+  getBottomLeft,
+  getBottomRight,
+  getTopLeft,
+  getTopRight,
+} from "ol/extent.js";
+import {
+  createEditingStyle
+} from "ol/style/Style.js";
+import {
+  fromUserCoordinate,
+  getUserProjection
+} from "ol/proj.js";
+import {
+  squaredDistance as squaredCoordinateDistance
+} from "ol/coordinate.js";
 /**
  * @typedef {Object} Options
- * @property {import("../geom/GeometryType.js").default} type Geometry type of
+ * @property {import("ol/geom/GeometryType.js").default} type Geometry type of
  * the geometries being drawn with this instance.
  * @property {number} [clickTolerance=6] The maximum distance in pixels between
  * "down" and "up" for a "up" event to be considered a "click" event and
  * actually add a point/vertex to the geometry being drawn.  The default of `6`
  * was chosen for the draw interaction to behave correctly on mouse as well as
  * on touch devices.
- * @property {import("../Collection.js").default<Feature>} [features]
+ * @property {import("ol/Collection.js").default<Feature>} [features]
  * Destination collection for the drawn features.
  * @property {VectorSource} [source] Destination source for
  * the drawn features.
@@ -67,17 +107,17 @@
  * @property {number} [minPoints] The number of points that must be drawn
  * before a polygon ring or line string can be finished. Default is `3` for
  * polygon rings and `2` for line strings.
- * @property {import("../events/condition.js").Condition} [finishCondition] A function
+ * @property {import("ol/events/condition.js").Condition} [finishCondition] A function
  * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a
  * boolean to indicate whether the drawing can be finished. Not used when drawing
  * POINT or MULTI_POINT geometries.
- * @property {import("../style/Style.js").StyleLike} [style]
+ * @property {import("ol/style/Style.js").StyleLike} [style]
  * Style for sketch features.
  * @property {GeometryFunction} [geometryFunction]
  * Function that is called when a geometry's coordinates are updated.
  * @property {string} [geometryName] Geometry name to use for features created
  * by the draw interaction.
- * @property {import("../events/condition.js").Condition} [condition] A function that
+ * @property {import("ol/events/condition.js").Condition} [condition] A function that
  * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a
  * boolean to indicate whether that event should be handled.
  * By default {@link module:ol/events/condition.noModifierKeys}, i.e. a click,
@@ -85,7 +125,7 @@
  * @property {boolean} [freehand=false] Operate in freehand mode for lines,
  * polygons, and circles.  This makes the interaction always operate in freehand
  * mode and takes precedence over any `freehandCondition` option.
- * @property {import("../events/condition.js").Condition} [freehandCondition]
+ * @property {import("ol/events/condition.js").Condition} [freehandCondition]
  * Condition that activates freehand drawing for lines and polygons. This
  * function takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and
  * returns a boolean to indicate whether that event should be handled. The
@@ -96,15 +136,15 @@
  */
 /**
  * Coordinate type when drawing points.
- * @typedef {import("../coordinate.js").Coordinate} PointCoordType
+ * @typedef {import("ol/coordinate.js").Coordinate} PointCoordType
  */
 /**
  * Coordinate type when drawing lines.
- * @typedef {Array<import("../coordinate.js").Coordinate>} LineCoordType
+ * @typedef {Array<import("ol/coordinate.js").Coordinate>} LineCoordType
  */
 /**
  * Coordinate type when drawing polygons.
- * @typedef {Array<Array<import("../coordinate.js").Coordinate>>} PolyCoordType
+ * @typedef {Array<Array<import("ol/coordinate.js").Coordinate>>} PolyCoordType
  */
 /**
  * Types used for drawing coordinates.
@@ -115,9 +155,9 @@
  * and a projection as arguments, and returns a geometry. The optional existing
  * geometry is the geometry that is returned when the function is called without
  * a second argument.
- * @typedef {function(!SketchCoordType, import("../geom/SimpleGeometry.js").default,
- *     import("../proj/Projection.js").default):
- *     import("../geom/SimpleGeometry.js").default} GeometryFunction
+ * @typedef {function(!SketchCoordType, import("ol/geom/SimpleGeometry.js").default,
+ *     import("ol/proj/Projection.js").default):
+ *     import("ol/geom/SimpleGeometry.js").default} GeometryFunction
  */
 /**
  * Draw mode.  This collapses multi-part geometry types with their single-part
@@ -125,65 +165,67 @@
  * @enum {string}
  */
 var Mode = {
-    POINT: 'Point',
-    LINE_STRING: 'LineString',
-    POLYGON: 'Polygon',
-    CIRCLE: 'Circle',
+  POINT: "Point",
+  LINE_STRING: "LineString",
+  POLYGON: "Polygon",
+  CIRCLE: "Circle",
 };
 /**
  * @enum {string}
  */
 var DrawEventType = {
-    /**
-     * Triggered upon feature draw start
-     * @event DrawEvent#drawstart
-     * @api
-     */
-    DRAWSTART: 'drawstart',
-    /**
-     * Triggered upon feature draw end
-     * @event DrawEvent#drawend
-     * @api
-     */
-    DRAWEND: 'drawend',
-    /**
-     * Triggered upon feature draw abortion
-     * @event DrawEvent#drawabort
-     * @api
-     */
-    DRAWABORT: 'drawabort',
+  /**
+   * Triggered upon feature draw start
+   * @event DrawEvent#drawstart
+   * @api
+   */
+  DRAWSTART: "drawstart",
+  /**
+   * Triggered upon feature draw end
+   * @event DrawEvent#drawend
+   * @api
+   */
+  DRAWEND: "drawend",
+  /**
+   * Triggered upon feature draw abortion
+   * @event DrawEvent#drawabort
+   * @api
+   */
+  DRAWABORT: "drawabort",
 };
 /**
  * @classdesc
  * Events emitted by {@link module:ol/interaction/Draw~Draw} instances are
  * instances of this type.
  */
-var DrawEvent = /** @class */ (function(_super) {
-    __extends(DrawEvent, _super);
+var DrawEvent = /** @class */ (function (_super) {
+  __extends(DrawEvent, _super);
+  /**
+   * @param {DrawEventType} type Type.
+   * @param {Feature} feature The feature drawn.
+   */
+  function DrawEvent(type, feature) {
+    var _this = _super.call(this, type) || this;
     /**
-     * @param {DrawEventType} type Type.
-     * @param {Feature} feature The feature drawn.
+     * The feature being drawn.
+     * @type {Feature}
+     * @api
      */
-    function DrawEvent(type, feature) {
-        var _this = _super.call(this, type) || this;
-        /**
-         * The feature being drawn.
-         * @type {Feature}
-         * @api
-         */
-        _this.feature = feature;
-        return _this;
-    }
-    return DrawEvent;
-}(Event));
-export { DrawEvent };
+    _this.feature = feature;
+    return _this;
+  }
+  return DrawEvent;
+})(Event);
+export {
+  DrawEvent
+};
 /***
  * @template Return
- * @typedef {import("../Observable").OnSignature<import("../Observable").EventTypes, import("../events/Event.js").default, Return> &
- *   import("../Observable").OnSignature<import("../ObjectEventType").Types|
- *     'change:active', import("../Object").ObjectEvent, Return> &
- *   import("../Observable").OnSignature<'drawabort'|'drawend'|'drawstart', DrawEvent, Return> &
- *   import("../Observable").CombinedOnSignature<import("../Observable").EventTypes|import("../ObjectEventType").Types|
+ * @typedef {import("ol/Observable").OnSignature<import("ol/Observable").EventTypes, import("ol/events/Event.js").default, Return> &
+ *   import("ol/Observable").OnSignature<import("ol/ObjectEventType").Types|
+ *     'change:active', import("ol/Object").ObjectEvent, Return> &
+ *   import("ol/Observable").OnSignature<'drawabort'|'drawend'|'drawstart', DrawEvent, Return> &
+ *   import("ol/Observable").CombinedOnSignature<import("ol/Observable").EventTypes|import("ol/ObjectEventType").Types|
  *     'change:active'|'drawabort'|'drawend'|'drawstart', Return>} DrawOnSignature
  */
 /**
@@ -193,875 +235,978 @@
  * @fires DrawEvent
  * @api
  */
-var Draw = /** @class */ (function(_super) {
-    __extends(Draw, _super);
-    /**
-     * @param {Options} options Options.
+var Draw = /** @class */ (function (_super) {
+  __extends(Draw, _super);
+  /**
+   * @param {Options} options Options.
+   */
+  function Draw(options) {
+    var _this = this;
+    var pointerOptions = /** @type {import("./Pointer.js").Options} */ (
+      options
+    );
+    if (!pointerOptions.stopDown) {
+      pointerOptions.stopDown = FALSE;
+    }
+    _this = _super.call(this, pointerOptions) || this;
+    /***
+     * @type {DrawOnSignature<import("ol/events").EventsKey>}
      */
-    function Draw(options) {
-        var _this = this;
-        var pointerOptions = /** @type {import("./Pointer.js").Options} */ (options);
-        if (!pointerOptions.stopDown) {
-            pointerOptions.stopDown = FALSE;
+    _this.coordinate = options.coordinate;
+    /***
+     * 输出坐标
+     */
+    _this.coordinateOver = options.coordinateOver;
+    /***
+     * 结束绘画
+     */
+    _this.overDraw = false;
+    /***
+     * 控制结束绘画
+     */
+    _this.isPoint = options.isPoint;
+    /***
+     * 是否是点
+     */
+    _this.coordinateOverPoint = options.coordinateOverPoint;
+    /***
+     * 输出点
+     */
+    _this.on;
+    /***
+     * @type {DrawOnSignature<import("ol/events").EventsKey>}
+     */
+    _this.once;
+    /***
+     * @type {DrawOnSignature<void>}
+     */
+    _this.un;
+    /**
+     * @type {boolean}
+     * @private
+     */
+    _this.shouldHandle_ = false;
+    /**
+     * @type {import("ol/pixel.js").Pixel}
+     * @private
+     */
+    _this.downPx_ = null;
+    /**
+     * @type {?}
+     * @private
+     */
+    _this.downTimeout_;
+    /**
+     * @type {number|undefined}
+     * @private
+     */
+    _this.lastDragTime_;
+    /**
+     * Pointer type of the last pointermove event
+     * @type {string}
+     * @private
+     */
+    _this.pointerType_;
+    /**
+     * @type {boolean}
+     * @private
+     */
+    _this.freehand_ = false;
+    /**
+     * Target source for drawn features.
+     * @type {VectorSource}
+     * @private
+     */
+    _this.source_ = options.source ? options.source : null;
+    /**
+     * Target collection for drawn features.
+     * @type {import("ol/Collection.js").default<Feature>}
+     * @private
+     */
+    _this.features_ = options.features ? options.features : null;
+    /**
+     * Pixel distance for snapping.
+     * @type {number}
+     * @private
+     */
+    _this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;
+    /**
+     * Geometry type.
+     * @type {import("ol/geom/GeometryType.js").default}
+     * @private
+     */
+    _this.type_ = /** @type {import("ol/geom/GeometryType.js").default} */ (
+      options.type
+    );
+    /**
+     * Drawing mode (derived from geometry type.
+     * @type {Mode}
+     * @private
+     */
+    _this.mode_ = getMode(_this.type_);
+    /**
+     * Stop click, singleclick, and doubleclick events from firing during drawing.
+     * Default is `false`.
+     * @type {boolean}
+     * @private
+     */
+    _this.stopClick_ = !!options.stopClick;
+    /**
+     * The number of points that must be drawn before a polygon ring or line
+     * string can be finished.  The default is 3 for polygon rings and 2 for
+     * line strings.
+     * @type {number}
+     * @private
+     */
+    _this.minPoints_ = options.minPoints ?
+      options.minPoints :
+      _this.mode_ === Mode.POLYGON ?
+      3 :
+      2;
+    /**
+     * The number of points that can be drawn before a polygon ring or line string
+     * is finished. The default is no restriction.
+     * @type {number}
+     * @private
+     */
+    _this.maxPoints_ =
+      _this.mode_ === Mode.CIRCLE ?
+      2 :
+      options.maxPoints ?
+      options.maxPoints :
+      Infinity;
+    /**
+     * A function to decide if a potential finish coordinate is permissible
+     * @private
+     * @type {import("ol/events/condition.js").Condition}
+     */
+    _this.finishCondition_ = options.finishCondition ?
+      options.finishCondition :
+      TRUE;
+    var geometryFunction = options.geometryFunction;
+    if (!geometryFunction) {
+      var mode_1 = _this.mode_;
+      if (mode_1 === Mode.CIRCLE) {
+        /**
+         * @param {!LineCoordType} coordinates The coordinates.
+         * @param {import("ol/geom/SimpleGeometry.js").default|undefined} geometry Optional geometry.
+         * @param {import("ol/proj/Projection.js").default} projection The view projection.
+         * @return {import("ol/geom/SimpleGeometry.js").default} A geometry.
+         */
+        geometryFunction = function (coordinates, geometry, projection) {
+          var circle = geometry ?
+            /** @type {Circle} */
+            (geometry) :
+            new Circle([NaN, NaN]);
+          var center = fromUserCoordinate(coordinates[0], projection);
+          var squaredLength = squaredCoordinateDistance(
+            center,
+            fromUserCoordinate(coordinates[coordinates.length - 1], projection)
+          );
+          circle.setCenterAndRadius(center, Math.sqrt(squaredLength));
+          var userProjection = getUserProjection();
+          if (userProjection) {
+            circle.transform(projection, userProjection);
+          }
+          return circle;
+        };
+      } else {
+        var Constructor_1;
+        if (mode_1 === Mode.POINT) {
+          Constructor_1 = Point;
+        } else if (mode_1 === Mode.LINE_STRING) {
+          Constructor_1 = LineString;
+        } else if (mode_1 === Mode.POLYGON) {
+          Constructor_1 = Polygon;
         }
-        _this = _super.call(this, pointerOptions) || this;
-        /***
-         * 自定义输入
-         */
-        _this._coordinate = options.coordinate || function() { return false };
-        /***
-         * 自定义输出
-         */
-        _this._coordinateOver = options.coordinateOver || function() { return false };
-        /***
-         * @type {DrawOnSignature<import("../Observable").OnReturn>}
-         */
-        _this.on;
-        /***
-         * @type {DrawOnSignature<import("../Observable").OnReturn>}
-         */
-        _this.once;
-        /***
-         * @type {DrawOnSignature<void>}
-         */
-        _this.un;
         /**
-         * @type {boolean}
-         * @private
+         * @param {!LineCoordType} coordinates The coordinates.
+         * @param {import("ol/geom/SimpleGeometry.js").default|undefined} geometry Optional geometry.
+         * @param {import("ol/proj/Projection.js").default} projection The view projection.
+         * @return {import("ol/geom/SimpleGeometry.js").default} A geometry.
          */
-        _this.shouldHandle_ = false;
-        /**
-         * @type {import("../pixel.js").Pixel}
-         * @private
-         */
-        _this.downPx_ = null;
-        /**
-         * @type {?}
-         * @private
-         */
-        _this.downTimeout_;
-        /**
-         * @type {number|undefined}
-         * @private
-         */
-        _this.lastDragTime_;
-        /**
-         * Pointer type of the last pointermove event
-         * @type {string}
-         * @private
-         */
-        _this.pointerType_;
-        /**
-         * @type {boolean}
-         * @private
-         */
-        _this.freehand_ = false;
-        /**
-         * Target source for drawn features.
-         * @type {VectorSource}
-         * @private
-         */
-        _this.source_ = options.source ? options.source : null;
-        /**
-         * Target collection for drawn features.
-         * @type {import("../Collection.js").default<Feature>}
-         * @private
-         */
-        _this.features_ = options.features ? options.features : null;
-        /**
-         * Pixel distance for snapping.
-         * @type {number}
-         * @private
-         */
-        _this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;
-        /**
-         * Geometry type.
-         * @type {import("../geom/GeometryType.js").default}
-         * @private
-         */
-        _this.type_ = /** @type {import("../geom/GeometryType.js").default} */ (options.type);
-        /**
-         * Drawing mode (derived from geometry type.
-         * @type {Mode}
-         * @private
-         */
-        _this.mode_ = getMode(_this.type_);
-        /**
-         * Stop click, singleclick, and doubleclick events from firing during drawing.
-         * Default is `false`.
-         * @type {boolean}
-         * @private
-         */
-        _this.stopClick_ = !!options.stopClick;
-        /**
-         * The number of points that must be drawn before a polygon ring or line
-         * string can be finished.  The default is 3 for polygon rings and 2 for
-         * line strings.
-         * @type {number}
-         * @private
-         */
-        _this.minPoints_ = options.minPoints ?
-            options.minPoints :
-            _this.mode_ === Mode.POLYGON ?
-            3 :
-            2;
-        /**
-         * The number of points that can be drawn before a polygon ring or line string
-         * is finished. The default is no restriction.
-         * @type {number}
-         * @private
-         */
-        _this.maxPoints_ =
-            _this.mode_ === Mode.CIRCLE ?
-            2 :
-            options.maxPoints ?
-            options.maxPoints :
-            Infinity;
-        /**
-         * A function to decide if a potential finish coordinate is permissible
-         * @private
-         * @type {import("../events/condition.js").Condition}
-         */
-        _this.finishCondition_ = options.finishCondition ?
-            options.finishCondition :
-            TRUE;
-        var geometryFunction = options.geometryFunction;
-        if (!geometryFunction) {
-            var mode_1 = _this.mode_;
-            if (mode_1 === Mode.CIRCLE) {
-                /**
-                 * @param {!LineCoordType} coordinates The coordinates.
-                 * @param {import("../geom/SimpleGeometry.js").default|undefined} geometry Optional geometry.
-                 * @param {import("../proj/Projection.js").default} projection The view projection.
-                 * @return {import("../geom/SimpleGeometry.js").default} A geometry.
-                 */
-                geometryFunction = function(coordinates, geometry, projection) {
-                    var circle = geometry ?
-                        /** @type {Circle} */ (geometry) :
-                        new Circle([NaN, NaN]);
-                    var center = fromUserCoordinate(coordinates[0], projection);
-                    var squaredLength = squaredCoordinateDistance(center, fromUserCoordinate(coordinates[coordinates.length - 1], projection));
-                    circle.setCenterAndRadius(center, Math.sqrt(squaredLength));
-                    var userProjection = getUserProjection();
-                    if (userProjection) {
-                        circle.transform(projection, userProjection);
-                    }
-                    return circle;
-                };
+        geometryFunction = function (coordinates, geometry, projection) {
+          if (geometry) {
+            if (mode_1 === Mode.POLYGON) {
+              if (coordinates[0].length) {
+                // Add a closing coordinate to match the first
+                geometry.setCoordinates([
+                  coordinates[0].concat([coordinates[0][0]]),
+                ]);
+              } else {
+                geometry.setCoordinates([]);
+              }
             } else {
-                var Constructor_1;
-                if (mode_1 === Mode.POINT) {
-                    Constructor_1 = Point;
-                } else if (mode_1 === Mode.LINE_STRING) {
-                    Constructor_1 = LineString;
-                } else if (mode_1 === Mode.POLYGON) {
-                    Constructor_1 = Polygon;
-                }
-                /**
-                 * @param {!LineCoordType} coordinates The coordinates.
-                 * @param {import("../geom/SimpleGeometry.js").default|undefined} geometry Optional geometry.
-                 * @param {import("../proj/Projection.js").default} projection The view projection.
-                 * @return {import("../geom/SimpleGeometry.js").default} A geometry.
-                 */
-                geometryFunction = function(coordinates, geometry, projection) {
-                    if (geometry) {
-                        if (mode_1 === Mode.POLYGON) {
-                            if (coordinates[0].length) {
-                                // Add a closing coordinate to match the first
-                                geometry.setCoordinates([
-                                    coordinates[0].concat([coordinates[0][0]]),
-                                ]);
-                            } else {
-                                geometry.setCoordinates([]);
-                            }
-                        } else {
-                            geometry.setCoordinates(coordinates);
-                        }
-                    } else {
-                        geometry = new Constructor_1(coordinates);
-                    }
-                    return geometry;
-                };
+              geometry.setCoordinates(coordinates);
             }
-        }
-        /**
-         * @type {GeometryFunction}
-         * @private
-         */
-        _this.geometryFunction_ = geometryFunction;
-        /**
-         * @type {number}
-         * @private
-         */
-        _this.dragVertexDelay_ =
-            options.dragVertexDelay !== undefined ? options.dragVertexDelay : 500;
-        /**
-         * Finish coordinate for the feature (first point for polygons, last point for
-         * linestrings).
-         * @type {import("../coordinate.js").Coordinate}
-         * @private
-         */
-        _this.finishCoordinate_ = null;
-        /**
-         * Sketch feature.
-         * @type {Feature}
-         * @private
-         */
-        _this.sketchFeature_ = null;
-        /**
-         * Sketch point.
-         * @type {Feature<Point>}
-         * @private
-         */
-        _this.sketchPoint_ = null;
-        /**
-         * Sketch coordinates. Used when drawing a line or polygon.
-         * @type {SketchCoordType}
-         * @private
-         */
-        _this.sketchCoords_ = null;
-        /**
-         * Sketch line. Used when drawing polygon.
-         * @type {Feature<LineString>}
-         * @private
-         */
-        _this.sketchLine_ = null;
-        /**
-         * Sketch line coordinates. Used when drawing a polygon or circle.
-         * @type {LineCoordType}
-         * @private
-         */
-        _this.sketchLineCoords_ = null;
-        /**
-         * Squared tolerance for handling up events.  If the squared distance
-         * between a down and up event is greater than this tolerance, up events
-         * will not be handled.
-         * @type {number}
-         * @private
-         */
-        _this.squaredClickTolerance_ = options.clickTolerance ?
-            options.clickTolerance * options.clickTolerance :
-            36;
-        /**
-         * Draw overlay where our sketch features are drawn.
-         * @type {VectorLayer}
-         * @private
-         */
-        _this.overlay_ = new VectorLayer({
-            source: new VectorSource({
-                useSpatialIndex: false,
-                wrapX: options.wrapX ? options.wrapX : false,
-            }),
-            style: options.style ? options.style : getDefaultStyleFunction(),
-            updateWhileInteracting: true,
-        });
-        /**
-         * Name of the geometry attribute for newly created features.
-         * @type {string|undefined}
-         * @private
-         */
-        _this.geometryName_ = options.geometryName;
-        /**
-         * @private
-         * @type {import("../events/condition.js").Condition}
-         */
-        _this.condition_ = options.condition ? options.condition : noModifierKeys;
-        /**
-         * @private
-         * @type {import("../events/condition.js").Condition}
-         */
-        _this.freehandCondition_;
-        if (options.freehand) {
-            _this.freehandCondition_ = always;
-        } else {
-            _this.freehandCondition_ = options.freehandCondition ?
-                options.freehandCondition :
-                shiftKeyOnly;
-        }
-        _this.addChangeListener(InteractionProperty.ACTIVE, _this.updateState_);
-        return _this;
+          } else {
+            geometry = new Constructor_1(coordinates);
+          }
+          return geometry;
+        };
+      }
     }
     /**
-     * Remove the interaction from its current map and attach it to the new map.
-     * Subclasses may set up event handlers to get notified about changes to
-     * the map here.
-     * @param {import("../PluggableMap.js").default} map Map.
+     * @type {GeometryFunction}
+     * @private
      */
-    Draw.prototype.setMap = function(map) {
-        _super.prototype.setMap.call(this, map);
-        this.updateState_();
-    };
+    _this.geometryFunction_ = geometryFunction;
     /**
-     * Get the overlay layer that this interaction renders sketch features to.
-     * @return {VectorLayer} Overlay layer.
-     * @api
+     * @type {number}
+     * @private
      */
-    Draw.prototype.getOverlay = function() {
-        return this.overlay_;
-    };
+    _this.dragVertexDelay_ =
+      options.dragVertexDelay !== undefined ? options.dragVertexDelay : 500;
     /**
-     * Handles the {@link module:ol/MapBrowserEvent map browser event} and may actually draw or finish the drawing.
-     * @param {import("../MapBrowserEvent.js").default} event Map browser event.
-     * @return {boolean} `false` to stop event propagation.
-     * @api
+     * Finish coordinate for the feature (first point for polygons, last point for
+     * linestrings).
+     * @type {import("ol/coordinate.js").Coordinate}
+     * @private
      */
-    Draw.prototype.handleEvent = function(event) {
-        if (event.originalEvent.type === EventType.CONTEXTMENU) {
-            // Avoid context menu for long taps when drawing on mobile
-            event.originalEvent.preventDefault();
-        }
-        this.freehand_ =
-            this.mode_ !== Mode.POINT && this.freehandCondition_(event);
-        var move = event.type === MapBrowserEventType.POINTERMOVE;
-        var pass = true;
-        if (!this.freehand_ &&
-            this.lastDragTime_ &&
-            event.type === MapBrowserEventType.POINTERDRAG) {
-            var now = Date.now();
-            if (now - this.lastDragTime_ >= this.dragVertexDelay_) {
-                this.downPx_ = event.pixel;
-                this.shouldHandle_ = !this.freehand_;
-                move = true;
-            } else {
-                this.lastDragTime_ = undefined;
-            }
-            if (this.shouldHandle_ && this.downTimeout_ !== undefined) {
-                clearTimeout(this.downTimeout_);
-                this.downTimeout_ = undefined;
-            }
-        }
-        if (this.freehand_ &&
-            event.type === MapBrowserEventType.POINTERDRAG &&
-            this.sketchFeature_ !== null) {
-            this.addToDrawing_(event.coordinate);
-            pass = false;
-        } else if (this.freehand_ &&
-            event.type === MapBrowserEventType.POINTERDOWN) {
-            pass = false;
-        } else if (move && this.getPointerCount() < 2) {
-            pass = event.type === MapBrowserEventType.POINTERMOVE;
-            if (pass && this.freehand_) {
-                this.handlePointerMove_(event);
-                if (this.shouldHandle_) {
-                    // Avoid page scrolling when freehand drawing on mobile
-                    event.originalEvent.preventDefault();
-                }
-            } else if (event.originalEvent.pointerType === 'mouse' ||
-                (event.type === MapBrowserEventType.POINTERDRAG &&
-                    this.downTimeout_ === undefined)) {
-                this.handlePointerMove_(event);
-            }
-        } else if (event.type === MapBrowserEventType.DBLCLICK) {
-            pass = false;
-        }
-        return _super.prototype.handleEvent.call(this, event) && pass;
-    };
+    _this.finishCoordinate_ = null;
     /**
-     * Handle pointer down events.
-     * @param {import("../MapBrowserEvent.js").default} event Event.
-     * @return {boolean} If the event was consumed.
+     * Sketch feature.
+     * @type {Feature}
+     * @private
      */
-    Draw.prototype.handleDownEvent = function(event) {
+    _this.sketchFeature_ = null;
+    /**
+     * Sketch point.
+     * @type {Feature<Point>}
+     * @private
+     */
+    _this.sketchPoint_ = null;
+    /**
+     * Sketch coordinates. Used when drawing a line or polygon.
+     * @type {SketchCoordType}
+     * @private
+     */
+    _this.sketchCoords_ = null;
+    /**
+     * Sketch line. Used when drawing polygon.
+     * @type {Feature<LineString>}
+     * @private
+     */
+    _this.sketchLine_ = null;
+    /**
+     * Sketch line coordinates. Used when drawing a polygon or circle.
+     * @type {LineCoordType}
+     * @private
+     */
+    _this.sketchLineCoords_ = null;
+    /**
+     * Squared tolerance for handling up events.  If the squared distance
+     * between a down and up event is greater than this tolerance, up events
+     * will not be handled.
+     * @type {number}
+     * @private
+     */
+    _this.squaredClickTolerance_ = options.clickTolerance ?
+      options.clickTolerance * options.clickTolerance :
+      36;
+    /**
+     * Draw overlay where our sketch features are drawn.
+     * @type {VectorLayer}
+     * @private
+     */
+    _this.overlay_ = new VectorLayer({
+      source: new VectorSource({
+        useSpatialIndex: false,
+        wrapX: options.wrapX ? options.wrapX : false,
+      }),
+      style: options.style ? options.style : getDefaultStyleFunction(),
+      updateWhileInteracting: true,
+    });
+    /**
+     * Name of the geometry attribute for newly created features.
+     * @type {string|undefined}
+     * @private
+     */
+    _this.geometryName_ = options.geometryName;
+    /**
+     * @private
+     * @type {import("ol/events/condition.js").Condition}
+     */
+    _this.condition_ = options.condition ? options.condition : noModifierKeys;
+    /**
+     * @private
+     * @type {import("ol/events/condition.js").Condition}
+     */
+    _this.freehandCondition_;
+    if (options.freehand) {
+      _this.freehandCondition_ = always;
+    } else {
+      _this.freehandCondition_ = options.freehandCondition ?
+        options.freehandCondition :
+        shiftKeyOnly;
+    }
+    _this.addChangeListener(InteractionProperty.ACTIVE, _this.updateState_);
+    return _this;
+  }
+  /**
+   * Remove the interaction from its current map and attach it to the new map.
+   * Subclasses may set up event handlers to get notified about changes to
+   * the map here.
+   * @param {import("ol/PluggableMap.js").default} map Map.
+   */
+  Draw.prototype.setMap = function (map) {
+    _super.prototype.setMap.call(this, map);
+    this.updateState_();
+  };
+  /**
+   * Get the overlay layer that this interaction renders sketch features to.
+   * @return {VectorLayer} Overlay layer.
+   * @api
+   */
+  Draw.prototype.getOverlay = function () {
+    return this.overlay_;
+  };
+  /**
+   * Handles the {@link module:ol/MapBrowserEvent map browser event} and may actually draw or finish the drawing.
+   * @param {import("ol/MapBrowserEvent.js").default} event Map browser event.
+   * @return {boolean} `false` to stop event propagation.
+   * @api
+   */
+  Draw.prototype.controlDrawing = function (val) {
+    this.overDraw = val;
+  };
+
+  Draw.prototype.handleEvent = function (event) {
+    if (event.originalEvent.type === EventType.CONTEXTMENU) {
+      // Avoid context menu for long taps when drawing on mobile
+      event.originalEvent.preventDefault();
+    }
+    this.freehand_ =
+      this.mode_ !== Mode.POINT && this.freehandCondition_(event);
+    var move = event.type === MapBrowserEventType.POINTERMOVE;
+    var pass = true;
+    if (
+      !this.freehand_ &&
+      this.lastDragTime_ &&
+      event.type === MapBrowserEventType.POINTERDRAG
+    ) {
+      var now = Date.now();
+      if (now - this.lastDragTime_ >= this.dragVertexDelay_) {
+        this.downPx_ = event.pixel;
         this.shouldHandle_ = !this.freehand_;
+        move = true;
+      } else {
+        this.lastDragTime_ = undefined;
+      }
+      if (this.shouldHandle_ && this.downTimeout_ !== undefined) {
+        clearTimeout(this.downTimeout_);
+        this.downTimeout_ = undefined;
+      }
+    }
+    if (
+      this.freehand_ &&
+      event.type === MapBrowserEventType.POINTERDRAG &&
+      this.sketchFeature_ !== null
+    ) {
+      if (this.overDraw) {
+        return;
+      }
+      this.addToDrawing_(event.coordinate);
+      pass = false;
+    } else if (
+      this.freehand_ &&
+      event.type === MapBrowserEventType.POINTERDOWN
+    ) {
+      pass = false;
+    } else if (move && this.getPointerCount() < 2) {
+      pass = event.type === MapBrowserEventType.POINTERMOVE;
+      if (pass && this.freehand_) {
+        if (this.overDraw) {
+          return;
+        }
+        this.handlePointerMove_(event);
+        if (this.shouldHandle_) {
+          // Avoid page scrolling when freehand drawing on mobile
+          event.originalEvent.preventDefault();
+        }
+      } else if (
+        event.originalEvent.pointerType === "mouse" ||
+        (event.type === MapBrowserEventType.POINTERDRAG &&
+          this.downTimeout_ === undefined)
+      ) {
+        if (this.overDraw) {
+          return;
+        }
+        this.handlePointerMove_(event);
+      }
+    } else if (event.type === MapBrowserEventType.DBLCLICK) {
+      pass = false;
+    }
+    return _super.prototype.handleEvent.call(this, event) && pass;
+  };
+  /**
+   * Handle pointer down events.
+   * @param {import("ol/MapBrowserEvent.js").default} event Event.
+   * @return {boolean} If the event was consumed.
+   */
+  Draw.prototype.handleDownEvent = function (event) {
+    // console.log(event.coordinate_, 'handleDownEvent')
+    this.shouldHandle_ = !this.freehand_;
+    if (this.freehand_) {
+      this.downPx_ = event.pixel;
+      if (!this.finishCoordinate_) {
+        this.startDrawing_(event.coordinate);
+      }
+      return true;
+    } else if (this.condition_(event)) {
+      this.lastDragTime_ = Date.now();
+      this.downTimeout_ = setTimeout(
+        function () {
+          this.handlePointerMove_(
+            new MapBrowserEvent(
+              MapBrowserEventType.POINTERMOVE,
+              event.map,
+              event.originalEvent,
+              false,
+              event.frameState
+            )
+          );
+        }.bind(this),
+        this.dragVertexDelay_
+      );
+      this.downPx_ = event.pixel;
+      return true;
+    } else {
+      this.lastDragTime_ = undefined;
+      return false;
+    }
+  };
+  /**
+   * Handle pointer up events.
+   * @param {import("ol/MapBrowserEvent.js").default} event Event.
+   * @return {boolean} If the event was consumed.
+   */
+  Draw.prototype.handleUpEvent = function (event) {
+    // console.log(event.coordinate_, 'handleUpEvent')//获取坐标点
+    if (this.isPoint) {
+      this.coordinateOverPoint(event);
+      this.finishDrawing();
+      return;
+    }
+    var pass = true;
+    if (this.getPointerCount() === 0) {
+      if (this.downTimeout_) {
+        clearTimeout(this.downTimeout_);
+        this.downTimeout_ = undefined;
+      }
+      this.handlePointerMove_(event);
+      if (this.shouldHandle_) {
+        var startingToDraw = !this.finishCoordinate_;
+        if (startingToDraw) {
+          //开始后抬起
+          // this.coordinateOverPoint(event);
+          // console.log(1)
+          this.coordinate(event);
+          this.startDrawing_(event.coordinate);
+        }
+        if (!startingToDraw && this.freehand_) {
+          this.finishDrawing();
+        } else if (
+          !this.freehand_ &&
+          (!startingToDraw || this.mode_ === Mode.POINT)
+        ) {
+          //选择后抬起
+          this.coordinate(event);
+          if (this.atFinish_(event.pixel)) {
+            //结束绘画
+            this.coordinateOver("结束");
+            if (this.finishCondition_(event)) {
+              this.finishDrawing();
+            }
+          } else {
+            // console.log(28888888888)
+            this.addToDrawing_(event.coordinate);
+          }
+        }
+        pass = false;
+      } else if (this.freehand_) {
+        this.abortDrawing();
+      }
+    }
+    if (!pass && this.stopClick_) {
+      event.preventDefault();
+    }
+    return pass;
+  };
+  // Draw.prototype.getCoordinate = function (fn) {
+  //     this.coordinate = fn;
+  //     console.log(this.coordinate)
+  // }
+  /**
+   * Handle move events.
+   * @param {import("ol/MapBrowserEvent.js").default} event A move event.
+   * @private
+   */
+  Draw.prototype.handlePointerMove_ = function (event) {
+    this.pointerType_ = event.originalEvent.pointerType;
+    if (
+      this.downPx_ &&
+      ((!this.freehand_ && this.shouldHandle_) ||
+        (this.freehand_ && !this.shouldHandle_))
+    ) {
+      var downPx = this.downPx_;
+      var clickPx = event.pixel;
+      var dx = downPx[0] - clickPx[0];
+      var dy = downPx[1] - clickPx[1];
+      var squaredDistance = dx * dx + dy * dy;
+      this.shouldHandle_ = this.freehand_ ?
+        squaredDistance > this.squaredClickTolerance_ :
+        squaredDistance <= this.squaredClickTolerance_;
+      if (!this.shouldHandle_) {
+        return;
+      }
+    }
+    if (this.finishCoordinate_) {
+      this.modifyDrawing_(event.coordinate);
+    } else {
+      this.createOrUpdateSketchPoint_(event.coordinate.slice());
+    }
+  };
+  /**
+   * Determine if an event is within the snapping tolerance of the start coord.
+   * @param {import("ol/pixel.js").Pixel} pixel Pixel.
+   * @return {boolean} The event is within the snapping tolerance of the start.
+   * @private
+   */
+  Draw.prototype.atFinish_ = function (pixel) {
+    // console.log(pixel, 879789)
+    var at = false;
+    if (this.sketchFeature_) {
+      var potentiallyDone = false;
+      var potentiallyFinishCoordinates = [this.finishCoordinate_];
+      var mode = this.mode_;
+      if (mode === Mode.POINT) {
+        at = true;
+      } else if (mode === Mode.CIRCLE) {
+        at = this.sketchCoords_.length === 2;
+      } else if (mode === Mode.LINE_STRING) {
+        potentiallyDone = this.sketchCoords_.length > this.minPoints_;
+      } else if (mode === Mode.POLYGON) {
+        var sketchCoords = /** @type {PolyCoordType} */ (this.sketchCoords_);
+        potentiallyDone = sketchCoords[0].length > this.minPoints_;
+        potentiallyFinishCoordinates = [
+          sketchCoords[0][0],
+          sketchCoords[0][sketchCoords[0].length - 2],
+        ];
+      }
+      if (potentiallyDone) {
+        var map = this.getMap();
+        for (var i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {
+          var finishCoordinate = potentiallyFinishCoordinates[i];
+          var finishPixel = map.getPixelFromCoordinate(finishCoordinate);
+          var dx = pixel[0] - finishPixel[0];
+          var dy = pixel[1] - finishPixel[1];
+          var snapTolerance = this.freehand_ ? 1 : this.snapTolerance_;
+          at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;
+          if (at) {
+            this.finishCoordinate_ = finishCoordinate;
+            break;
+          }
+        }
+      }
+    }
+    return at;
+  };
+  /**
+   * @param {import("ol/coordinate").Coordinate} coordinates Coordinate.
+   * @private
+   */
+  Draw.prototype.createOrUpdateSketchPoint_ = function (coordinates) {
+    if (!this.sketchPoint_) {
+      this.sketchPoint_ = new Feature(new Point(coordinates));
+      this.updateSketchFeatures_();
+    } else {
+      var sketchPointGeom = this.sketchPoint_.getGeometry();
+      sketchPointGeom.setCoordinates(coordinates);
+    }
+  };
+  /**
+   * @param {import("ol/geom/Polygon.js").default} geometry Polygon geometry.
+   * @private
+   */
+  Draw.prototype.createOrUpdateCustomSketchLine_ = function (geometry) {
+    if (!this.sketchLine_) {
+      this.sketchLine_ = new Feature();
+    }
+    var ring = geometry.getLinearRing(0);
+    var sketchLineGeom = this.sketchLine_.getGeometry();
+    if (!sketchLineGeom) {
+      sketchLineGeom = new LineString(
+        ring.getFlatCoordinates(),
+        ring.getLayout()
+      );
+      this.sketchLine_.setGeometry(sketchLineGeom);
+    } else {
+      sketchLineGeom.setFlatCoordinates(
+        ring.getLayout(),
+        ring.getFlatCoordinates()
+      );
+      sketchLineGeom.changed();
+    }
+  };
+  /**
+   * Start the drawing.
+   * @param {import("ol/coordinate.js").Coordinate} start Start coordinate.
+   * @private
+   */
+  Draw.prototype.startDrawing_ = function (start) {
+    if (this.overDraw) {
+      return;
+    }
+    var projection = this.getMap().getView().getProjection();
+    this.finishCoordinate_ = start;
+    if (this.mode_ === Mode.POINT) {
+      this.sketchCoords_ = start.slice();
+    } else if (this.mode_ === Mode.POLYGON) {
+      this.sketchCoords_ = [
+        [start.slice(), start.slice()]
+      ];
+      this.sketchLineCoords_ = this.sketchCoords_[0];
+    } else {
+      this.sketchCoords_ = [start.slice(), start.slice()];
+    }
+    if (this.sketchLineCoords_) {
+      this.sketchLine_ = new Feature(new LineString(this.sketchLineCoords_));
+    }
+    var geometry = this.geometryFunction_(
+      this.sketchCoords_,
+      undefined,
+      projection
+    );
+    this.sketchFeature_ = new Feature();
+    if (this.geometryName_) {
+      this.sketchFeature_.setGeometryName(this.geometryName_);
+    }
+    this.sketchFeature_.setGeometry(geometry);
+    this.updateSketchFeatures_();
+    this.dispatchEvent(
+      new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_)
+    );
+  };
+  /**
+   * Modify the drawing.
+   * @param {import("ol/coordinate.js").Coordinate} coordinate Coordinate.
+   * @private
+   */
+  Draw.prototype.modifyDrawing_ = function (coordinate) {
+    var map = this.getMap();
+    var geometry = this.sketchFeature_.getGeometry();
+    var projection = map.getView().getProjection();
+    var coordinates, last;
+    if (this.mode_ === Mode.POINT) {
+      last = this.sketchCoords_;
+    } else if (this.mode_ === Mode.POLYGON) {
+      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
+      last = coordinates[coordinates.length - 1];
+      if (this.atFinish_(map.getPixelFromCoordinate(coordinate))) {
+        // snap to finish
+        coordinate = this.finishCoordinate_.slice();
+      }
+    } else {
+      coordinates = this.sketchCoords_;
+      last = coordinates[coordinates.length - 1];
+    }
+    last[0] = coordinate[0];
+    last[1] = coordinate[1];
+    this.geometryFunction_(
+      /** @type {!LineCoordType} */
+      (this.sketchCoords_),
+      geometry,
+      projection
+    );
+    if (this.sketchPoint_) {
+      var sketchPointGeom = this.sketchPoint_.getGeometry();
+      sketchPointGeom.setCoordinates(coordinate);
+    }
+    if (
+      geometry.getType() === GeometryType.POLYGON &&
+      this.mode_ !== Mode.POLYGON
+    ) {
+      this.createOrUpdateCustomSketchLine_( /** @type {Polygon} */ (geometry));
+    } else if (this.sketchLineCoords_) {
+      var sketchLineGeom = this.sketchLine_.getGeometry();
+      sketchLineGeom.setCoordinates(this.sketchLineCoords_);
+    }
+    this.updateSketchFeatures_();
+  };
+  /**
+   * Add a new coordinate to the drawing.
+   * @param {!PointCoordType} coordinate Coordinate
+   * @private
+   */
+  Draw.prototype.addToDrawing_ = function (coordinate) {
+    var geometry = this.sketchFeature_.getGeometry();
+    var projection = this.getMap().getView().getProjection();
+    var done;
+    var coordinates;
+    var mode = this.mode_;
+    if (mode === Mode.LINE_STRING || mode === Mode.CIRCLE) {
+      this.finishCoordinate_ = coordinate.slice();
+      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);
+      if (coordinates.length >= this.maxPoints_) {
         if (this.freehand_) {
-            this.downPx_ = event.pixel;
-            if (!this.finishCoordinate_) {
-                this.startDrawing_(event.coordinate);
-            }
-            return true;
-        } else if (this.condition_(event)) {
-            this.lastDragTime_ = Date.now();
-            this.downTimeout_ = setTimeout(function() {
-                this.handlePointerMove_(new MapBrowserEvent(MapBrowserEventType.POINTERMOVE, event.map, event.originalEvent, false, event.frameState));
-            }.bind(this), this.dragVertexDelay_);
-            this.downPx_ = event.pixel;
-            return true;
+          coordinates.pop();
         } else {
-            this.lastDragTime_ = undefined;
-            return false;
+          done = true;
         }
-    };
-    /**
-     * Handle pointer up events.
-     * @param {import("../MapBrowserEvent.js").default} event Event.
-     * @return {boolean} If the event was consumed.
-     */
-    Draw.prototype.handleUpEvent = function(event) {
-        var pass = true;
-        if (this.getPointerCount() === 0) {
-            if (this.downTimeout_) {
-                clearTimeout(this.downTimeout_);
-                this.downTimeout_ = undefined;
-            }
-            this.handlePointerMove_(event);
-            if (this.shouldHandle_) {
-                var startingToDraw = !this.finishCoordinate_;
-                if (startingToDraw) {
-                    this.startDrawing_(event.coordinate);
-                }
-                if (!startingToDraw && this.freehand_) {
-                    this.finishDrawing();
-                } else if (!this.freehand_ &&
-                    (!startingToDraw || this.mode_ === Mode.POINT)) {
-                    if (this.atFinish_(event.pixel)) {
-                        if (this.finishCondition_(event)) {
-                            this.finishDrawing();
-                        }
-                    } else {
-                        this.addToDrawing_(event.coordinate);
-                    }
-                }
-                pass = false;
-            } else if (this.freehand_) {
-                this.abortDrawing();
-            }
-        }
-        if (!pass && this.stopClick_) {
-            event.preventDefault();
-        }
-        return pass;
-    };
-    /**
-     * Handle move events.
-     * @param {import("../MapBrowserEvent.js").default} event A move event.
-     * @private
-     */
-    Draw.prototype.handlePointerMove_ = function(event) {
-        this.pointerType_ = event.originalEvent.pointerType;
-        if (this.downPx_ &&
-            ((!this.freehand_ && this.shouldHandle_) ||
-                (this.freehand_ && !this.shouldHandle_))) {
-            var downPx = this.downPx_;
-            var clickPx = event.pixel;
-            var dx = downPx[0] - clickPx[0];
-            var dy = downPx[1] - clickPx[1];
-            var squaredDistance = dx * dx + dy * dy;
-            this.shouldHandle_ = this.freehand_ ?
-                squaredDistance > this.squaredClickTolerance_ :
-                squaredDistance <= this.squaredClickTolerance_;
-            if (!this.shouldHandle_) {
-                return;
-            }
-        }
-        if (this.finishCoordinate_) {
-            this.modifyDrawing_(event.coordinate);
+      }
+      coordinates.push(coordinate.slice());
+      this.geometryFunction_(coordinates, geometry, projection);
+    } else if (mode === Mode.POLYGON) {
+      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
+      if (coordinates.length >= this.maxPoints_) {
+        if (this.freehand_) {
+          coordinates.pop();
         } else {
-            this.createOrUpdateSketchPoint_(event.coordinate.slice());
+          done = true;
         }
-    };
-    /**
-     * Determine if an event is within the snapping tolerance of the start coord.
-     * @param {import("../pixel.js").Pixel} pixel Pixel.
-     * @return {boolean} The event is within the snapping tolerance of the start.
-     * @private
-     */
-    Draw.prototype.atFinish_ = function(pixel) {
-        var at = false;
-        if (this.sketchFeature_) {
-            var potentiallyDone = false;
-            var potentiallyFinishCoordinates = [this.finishCoordinate_];
-            var mode = this.mode_;
-            if (mode === Mode.POINT) {
-                at = true;
-            } else if (mode === Mode.CIRCLE) {
-                at = this.sketchCoords_.length === 2;
-            } else if (mode === Mode.LINE_STRING) {
-                potentiallyDone = this.sketchCoords_.length > this.minPoints_;
-            } else if (mode === Mode.POLYGON) {
-                var sketchCoords = /** @type {PolyCoordType} */ (this.sketchCoords_);
-                potentiallyDone = sketchCoords[0].length > this.minPoints_;
-                potentiallyFinishCoordinates = [
-                    sketchCoords[0][0],
-                    sketchCoords[0][sketchCoords[0].length - 2],
-                ];
-            }
-            if (potentiallyDone) {
-                var map = this.getMap();
-                for (var i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {
-                    var finishCoordinate = potentiallyFinishCoordinates[i];
-                    var finishPixel = map.getPixelFromCoordinate(finishCoordinate);
-                    var dx = pixel[0] - finishPixel[0];
-                    var dy = pixel[1] - finishPixel[1];
-                    var snapTolerance = this.freehand_ ? 1 : this.snapTolerance_;
-                    at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;
-                    if (at) {
-                        this.finishCoordinate_ = finishCoordinate;
-                        break;
-                    }
-                }
-            }
-        }
-        return at;
-    };
-    /**
-     * @param {import("../coordinate").Coordinate} coordinates Coordinate.
-     * @private
-     */
-    Draw.prototype.createOrUpdateSketchPoint_ = function(coordinates) {
-        if (!this.sketchPoint_) {
-            this.sketchPoint_ = new Feature(new Point(coordinates));
-            this.updateSketchFeatures_();
-        } else {
-            var sketchPointGeom = this.sketchPoint_.getGeometry();
-            sketchPointGeom.setCoordinates(coordinates);
-        }
-    };
-    /**
-     * @param {import("../geom/Polygon.js").default} geometry Polygon geometry.
-     * @private
-     */
-    Draw.prototype.createOrUpdateCustomSketchLine_ = function(geometry) {
-        if (!this.sketchLine_) {
-            this.sketchLine_ = new Feature();
-        }
-        var ring = geometry.getLinearRing(0);
-        var sketchLineGeom = this.sketchLine_.getGeometry();
-        if (!sketchLineGeom) {
-            sketchLineGeom = new LineString(ring.getFlatCoordinates(), ring.getLayout());
-            this.sketchLine_.setGeometry(sketchLineGeom);
-        } else {
-            sketchLineGeom.setFlatCoordinates(ring.getLayout(), ring.getFlatCoordinates());
-            sketchLineGeom.changed();
-        }
-    };
-    /**
-     * Start the drawing.
-     * @param {import("../coordinate.js").Coordinate} start Start coordinate.
-     * @private
-     */
-    Draw.prototype.startDrawing_ = function(start) {
-        var projection = this.getMap().getView().getProjection();
-        this.finishCoordinate_ = start;
-        this._coordinate(this.finishCoordinate_)
-        if (this.mode_ === Mode.POINT) {
-            this.sketchCoords_ = start.slice();
-        } else if (this.mode_ === Mode.POLYGON) {
-            this.sketchCoords_ = [
-                [start.slice(), start.slice()]
-            ];
-            this.sketchLineCoords_ = this.sketchCoords_[0];
-        } else {
-            this.sketchCoords_ = [start.slice(), start.slice()];
-        }
-        if (this.sketchLineCoords_) {
-            this.sketchLine_ = new Feature(new LineString(this.sketchLineCoords_));
-        }
-        var geometry = this.geometryFunction_(this.sketchCoords_, undefined, projection);
-        this.sketchFeature_ = new Feature();
-        if (this.geometryName_) {
-            this.sketchFeature_.setGeometryName(this.geometryName_);
-        }
-        this.sketchFeature_.setGeometry(geometry);
-        this.updateSketchFeatures_();
-        this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));
-    };
-    /**
-     * Modify the drawing.
-     * @param {import("../coordinate.js").Coordinate} coordinate Coordinate.
-     * @private
-     */
-    Draw.prototype.modifyDrawing_ = function(coordinate) {
-        var map = this.getMap();
-        var geometry = this.sketchFeature_.getGeometry();
-        var projection = map.getView().getProjection();
-        var coordinates, last;
-        if (this.mode_ === Mode.POINT) {
-            last = this.sketchCoords_;
-        } else if (this.mode_ === Mode.POLYGON) {
-            coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
-            last = coordinates[coordinates.length - 1];
-            if (this.atFinish_(map.getPixelFromCoordinate(coordinate))) {
-                // snap to finish
-                coordinate = this.finishCoordinate_.slice();
-            }
-        } else {
-            coordinates = this.sketchCoords_;
-            last = coordinates[coordinates.length - 1];
-        }
-        last[0] = coordinate[0];
-        last[1] = coordinate[1];
-        this.geometryFunction_(
-            /** @type {!LineCoordType} */
-            (this.sketchCoords_), geometry, projection);
-        if (this.sketchPoint_) {
-            var sketchPointGeom = this.sketchPoint_.getGeometry();
-            sketchPointGeom.setCoordinates(coordinate);
-        }
-        if (geometry.getType() === GeometryType.POLYGON &&
-            this.mode_ !== Mode.POLYGON) {
-            this.createOrUpdateCustomSketchLine_( /** @type {Polygon} */ (geometry));
-        } else if (this.sketchLineCoords_) {
-            var sketchLineGeom = this.sketchLine_.getGeometry();
-            sketchLineGeom.setCoordinates(this.sketchLineCoords_);
-        }
-        this.updateSketchFeatures_();
-    };
-    /**
-     * Add a new coordinate to the drawing.
-     * @param {!PointCoordType} coordinate Coordinate
-     * @private
-     */
-    Draw.prototype.addToDrawing_ = function(coordinate) {
-        var geometry = this.sketchFeature_.getGeometry();
-        var projection = this.getMap().getView().getProjection();
-        var done;
-        var coordinates;
-        var mode = this.mode_;
-        if (mode === Mode.LINE_STRING || mode === Mode.CIRCLE) {
-            this.finishCoordinate_ = coordinate.slice();
-            coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);
-            if (coordinates.length >= this.maxPoints_) {
-                if (this.freehand_) {
-                    coordinates.pop();
-                } else {
-                    done = true;
-                }
-            }
-            coordinates.push(coordinate.slice());
-            this._coordinate(coordinate.slice())
-            this.geometryFunction_(coordinates, geometry, projection);
-        } else if (mode === Mode.POLYGON) {
-            coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
-            if (coordinates.length >= this.maxPoints_) {
-                if (this.freehand_) {
-                    coordinates.pop();
-                } else {
-                    done = true;
-                }
-            }
-            coordinates.push(coordinate.slice());
-            if (done) {
-                this.finishCoordinate_ = coordinates[0];
-            }
-            this.geometryFunction_(this.sketchCoords_, geometry, projection);
-        }
-        this.createOrUpdateSketchPoint_(coordinate.slice());
-        this.updateSketchFeatures_();
-        if (done) {
-            this.finishDrawing();
-        }
-    };
-    /**
-     * Remove last point of the feature currently being drawn. Does not do anything when
-     * drawing POINT or MULTI_POINT geometries.
-     * @api
-     */
-    Draw.prototype.removeLastPoint = function() {
-        if (!this.sketchFeature_) {
-            return;
-        }
-        var geometry = this.sketchFeature_.getGeometry();
-        var projection = this.getMap().getView().getProjection();
-        var coordinates;
-        var mode = this.mode_;
-        if (mode === Mode.LINE_STRING || mode === Mode.CIRCLE) {
-            coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);
-            coordinates.splice(-2, 1);
-            if (coordinates.length >= 2) {
-                this.finishCoordinate_ = coordinates[coordinates.length - 2].slice();
-                var finishCoordinate = this.finishCoordinate_.slice();
-                coordinates[coordinates.length - 1] = finishCoordinate;
-                this.createOrUpdateSketchPoint_(finishCoordinate);
-            }
-            this.geometryFunction_(coordinates, geometry, projection);
-            if (geometry.getType() === GeometryType.POLYGON && this.sketchLine_) {
-                this.createOrUpdateCustomSketchLine_( /** @type {Polygon} */ (geometry));
-            }
-        } else if (mode === Mode.POLYGON) {
-            coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
-            coordinates.splice(-2, 1);
-            var sketchLineGeom = this.sketchLine_.getGeometry();
-            if (coordinates.length >= 2) {
-                var finishCoordinate = coordinates[coordinates.length - 2].slice();
-                coordinates[coordinates.length - 1] = finishCoordinate;
-                this.createOrUpdateSketchPoint_(finishCoordinate);
-            }
-            sketchLineGeom.setCoordinates(coordinates);
-            this.geometryFunction_(this.sketchCoords_, geometry, projection);
-        }
-        if (coordinates.length === 1) {
-            this.abortDrawing();
-        }
-        this.updateSketchFeatures_();
-    };
-    /**
-     * Stop drawing and add the sketch feature to the target layer.
-     * The {@link module:ol/interaction/Draw~DrawEventType.DRAWEND} event is
-     * dispatched before inserting the feature.
-     * @api
-     */
-    Draw.prototype.finishDrawing = function() {
-        var sketchFeature = this.abortDrawing_();
-        if (!sketchFeature) {
-            return;
-        }
-        var coordinates = this.sketchCoords_;
-        var geometry = sketchFeature.getGeometry();
-        var projection = this.getMap().getView().getProjection();
-        if (this.mode_ === Mode.LINE_STRING) {
-            // remove the redundant last point
-            coordinates.pop();
-            this.geometryFunction_(coordinates, geometry, projection);
-        } else if (this.mode_ === Mode.POLYGON) {
-            // remove the redundant last point in ring
-            /** @type {PolyCoordType} */
-            (coordinates)[0].pop();
-            this.geometryFunction_(coordinates, geometry, projection);
-            coordinates = geometry.getCoordinates();
-        }
-        // cast multi-part geometries
-        if (this.type_ === GeometryType.MULTI_POINT) {
-            sketchFeature.setGeometry(new MultiPoint([ /** @type {PointCoordType} */ (coordinates)]));
-        } else if (this.type_ === GeometryType.MULTI_LINE_STRING) {
-            sketchFeature.setGeometry(new MultiLineString([ /** @type {LineCoordType} */ (coordinates)]));
-        } else if (this.type_ === GeometryType.MULTI_POLYGON) {
-            sketchFeature.setGeometry(new MultiPolygon([ /** @type {PolyCoordType} */ (coordinates)]));
-        }
-        // First dispatch event to allow full set up of feature
-        this.dispatchEvent(new DrawEvent(DrawEventType.DRAWEND, sketchFeature));
-        // Then insert feature
-        if (this.features_) {
-            this.features_.push(sketchFeature);
-        }
-        if (this.source_) {
-            this.source_.addFeature(sketchFeature);
-        }
-        this._coordinateOver();
-    };
-    /**
-     * Stop drawing without adding the sketch feature to the target layer.
-     * @return {Feature} The sketch feature (or null if none).
-     * @private
-     */
-    Draw.prototype.abortDrawing_ = function() {
-        this.finishCoordinate_ = null;
-        var sketchFeature = this.sketchFeature_;
-        this.sketchFeature_ = null;
-        this.sketchPoint_ = null;
-        this.sketchLine_ = null;
-        this.overlay_.getSource().clear(true);
-        return sketchFeature;
-    };
-    /**
-     * Stop drawing without adding the sketch feature to the target layer.
-     * @api
-     */
-    Draw.prototype.abortDrawing = function() {
-        var sketchFeature = this.abortDrawing_();
-        if (sketchFeature) {
-            this.dispatchEvent(new DrawEvent(DrawEventType.DRAWABORT, sketchFeature));
-        }
-    };
-    /**
-     * Append coordinates to the end of the geometry that is currently being drawn.
-     * This can be used when drawing LineStrings or Polygons. Coordinates will
-     * either be appended to the current LineString or the outer ring of the current
-     * Polygon. If no geometry is being drawn, a new one will be created.
-     * @param {!LineCoordType} coordinates Linear coordinates to be appended to
-     * the coordinate array.
-     * @api
-     */
-    Draw.prototype.appendCoordinates = function(coordinates) {
-        var mode = this.mode_;
-        var newDrawing = !this.sketchFeature_;
-        if (newDrawing) {
-            this.startDrawing_(coordinates[0]);
-        }
-        /** @type {LineCoordType} */
-        var sketchCoords;
-        if (mode === Mode.LINE_STRING || mode === Mode.CIRCLE) {
-            sketchCoords = /** @type {LineCoordType} */ (this.sketchCoords_);
-        } else if (mode === Mode.POLYGON) {
-            sketchCoords =
-                this.sketchCoords_ && this.sketchCoords_.length ?
-                /** @type {PolyCoordType} */ (this.sketchCoords_)[0] :
-                [];
-        } else {
-            return;
-        }
-        if (newDrawing) {
-            sketchCoords.shift();
-        }
-        // Remove last coordinate from sketch drawing (this coordinate follows cursor position)
-        sketchCoords.pop();
-        // Append coordinate list
-        for (var i = 0; i < coordinates.length; i++) {
-            this.addToDrawing_(coordinates[i]);
-        }
-        var ending = coordinates[coordinates.length - 1];
-        // Duplicate last coordinate for sketch drawing (cursor position)
-        this.addToDrawing_(ending);
-        this.modifyDrawing_(ending);
-    };
-    /**
-     * Initiate draw mode by starting from an existing geometry which will
-     * receive new additional points. This only works on features with
-     * `LineString` geometries, where the interaction will extend lines by adding
-     * points to the end of the coordinates array.
-     * This will change the original feature, instead of drawing a copy.
-     *
-     * The function will dispatch a `drawstart` event.
-     *
-     * @param {!Feature<LineString>} feature Feature to be extended.
-     * @api
-     */
-    Draw.prototype.extend = function(feature) {
-        var geometry = feature.getGeometry();
-        var lineString = geometry;
-        this.sketchFeature_ = feature;
-        this.sketchCoords_ = lineString.getCoordinates();
-        var last = this.sketchCoords_[this.sketchCoords_.length - 1];
-        this.finishCoordinate_ = last.slice();
-        this.sketchCoords_.push(last.slice());
-        this.sketchPoint_ = new Feature(new Point(last));
-        this.updateSketchFeatures_();
-        this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));
-    };
-    /**
-     * Redraw the sketch features.
-     * @private
-     */
-    Draw.prototype.updateSketchFeatures_ = function() {
-        var sketchFeatures = [];
-        if (this.sketchFeature_) {
-            sketchFeatures.push(this.sketchFeature_);
-        }
-        if (this.sketchLine_) {
-            sketchFeatures.push(this.sketchLine_);
-        }
-        if (this.sketchPoint_) {
-            sketchFeatures.push(this.sketchPoint_);
-        }
-        var overlaySource = this.overlay_.getSource();
-        overlaySource.clear(true);
-        overlaySource.addFeatures(sketchFeatures);
-    };
-    /**
-     * @private
-     */
-    Draw.prototype.updateState_ = function() {
-        var map = this.getMap();
-        var active = this.getActive();
-        if (!map || !active) {
-            this.abortDrawing();
-        }
-        this.overlay_.setMap(active ? map : null);
-    };
-    return Draw;
-}(PointerInteraction));
+      }
+      coordinates.push(coordinate.slice());
+      if (done) {
+        this.finishCoordinate_ = coordinates[0];
+      }
+      this.geometryFunction_(this.sketchCoords_, geometry, projection);
+    }
+    this.createOrUpdateSketchPoint_(coordinate.slice());
+    this.updateSketchFeatures_();
+    if (done) {
+      this.finishDrawing();
+    }
+  };
+  /**
+   * Remove last point of the feature currently being drawn. Does not do anything when
+   * drawing POINT or MULTI_POINT geometries.
+   * @api
+   */
+  Draw.prototype.removeLastPoint = function () {
+    if (!this.sketchFeature_) {
+      return;
+    }
+    var geometry = this.sketchFeature_.getGeometry();
+    var projection = this.getMap().getView().getProjection();
+    var coordinates;
+    var mode = this.mode_;
+    if (mode === Mode.LINE_STRING || mode === Mode.CIRCLE) {
+      coordinates = /** @type {LineCoordType} */ (this.sketchCoords_);
+      coordinates.splice(-2, 1);
+      if (coordinates.length >= 2) {
+        this.finishCoordinate_ = coordinates[coordinates.length - 2].slice();
+        var finishCoordinate = this.finishCoordinate_.slice();
+        coordinates[coordinates.length - 1] = finishCoordinate;
+        this.createOrUpdateSketchPoint_(finishCoordinate);
+      }
+      this.geometryFunction_(coordinates, geometry, projection);
+      if (geometry.getType() === GeometryType.POLYGON && this.sketchLine_) {
+        this.createOrUpdateCustomSketchLine_( /** @type {Polygon} */ (geometry));
+      }
+    } else if (mode === Mode.POLYGON) {
+      coordinates = /** @type {PolyCoordType} */ (this.sketchCoords_)[0];
+      coordinates.splice(-2, 1);
+      var sketchLineGeom = this.sketchLine_.getGeometry();
+      if (coordinates.length >= 2) {
+        var finishCoordinate = coordinates[coordinates.length - 2].slice();
+        coordinates[coordinates.length - 1] = finishCoordinate;
+        this.createOrUpdateSketchPoint_(finishCoordinate);
+      }
+      sketchLineGeom.setCoordinates(coordinates);
+      this.geometryFunction_(this.sketchCoords_, geometry, projection);
+    }
+    if (coordinates.length === 1) {
+      this.abortDrawing();
+    }
+    this.updateSketchFeatures_();
+  };
+  /**
+   * Stop drawing and add the sketch feature to the target layer.
+   * The {@link module:ol/interaction/Draw~DrawEventType.DRAWEND} event is
+   * dispatched before inserting the feature.
+   * @api
+   */
+  Draw.prototype.finishDrawing = function () {
+    // console.log("finishDrawing")
+    var sketchFeature = this.abortDrawing_();
+    if (!sketchFeature) {
+      return;
+    }
+    var coordinates = this.sketchCoords_;
+    var geometry = sketchFeature.getGeometry();
+    var projection = this.getMap().getView().getProjection();
+    if (this.mode_ === Mode.LINE_STRING) {
+      // remove the redundant last point
+      coordinates.pop();
+      this.geometryFunction_(coordinates, geometry, projection);
+    } else if (this.mode_ === Mode.POLYGON) {
+      // remove the redundant last point in ring
+      /** @type {PolyCoordType} */
+      (coordinates)[0].pop();
+      this.geometryFunction_(coordinates, geometry, projection);
+      coordinates = geometry.getCoordinates();
+    }
+    // cast multi-part geometries
+    if (this.type_ === GeometryType.MULTI_POINT) {
+      sketchFeature.setGeometry(
+        new MultiPoint([ /** @type {PointCoordType} */ (coordinates)])
+      );
+    } else if (this.type_ === GeometryType.MULTI_LINE_STRING) {
+      sketchFeature.setGeometry(
+        new MultiLineString([ /** @type {LineCoordType} */ (coordinates)])
+      );
+    } else if (this.type_ === GeometryType.MULTI_POLYGON) {
+      sketchFeature.setGeometry(
+        new MultiPolygon([ /** @type {PolyCoordType} */ (coordinates)])
+      );
+    }
+    // First dispatch event to allow full set up of feature
+    this.dispatchEvent(new DrawEvent(DrawEventType.DRAWEND, sketchFeature));
+    // Then insert feature
+    if (this.features_) {
+      this.features_.push(sketchFeature);
+    }
+    if (this.source_) {
+      this.source_.addFeature(sketchFeature);
+    }
+  };
+  /**
+   * Stop drawing without adding the sketch feature to the target layer.
+   * @return {Feature} The sketch feature (or null if none).
+   * @private
+   */
+  Draw.prototype.abortDrawing_ = function () {
+    this.finishCoordinate_ = null;
+    var sketchFeature = this.sketchFeature_;
+    this.sketchFeature_ = null;
+    this.sketchPoint_ = null;
+    this.sketchLine_ = null;
+    this.overlay_.getSource().clear(true);
+    return sketchFeature;
+  };
+  /**
+   * Stop drawing without adding the sketch feature to the target layer.
+   * @api
+   */
+  Draw.prototype.abortDrawing = function () {
+    var sketchFeature = this.abortDrawing_();
+    if (sketchFeature) {
+      this.dispatchEvent(new DrawEvent(DrawEventType.DRAWABORT, sketchFeature));
+    }
+  };
+  /**
+   * Append coordinates to the end of the geometry that is currently being drawn.
+   * This can be used when drawing LineStrings or Polygons. Coordinates will
+   * either be appended to the current LineString or the outer ring of the current
+   * Polygon. If no geometry is being drawn, a new one will be created.
+   * @param {!LineCoordType} coordinates Linear coordinates to be appended to
+   * the coordinate array.
+   * @api
+   */
+  Draw.prototype.appendCoordinates = function (coordinates) {
+    var mode = this.mode_;
+    var newDrawing = !this.sketchFeature_;
+    if (newDrawing) {
+      this.startDrawing_(coordinates[0]);
+    }
+    /** @type {LineCoordType} */
+    var sketchCoords;
+    if (mode === Mode.LINE_STRING || mode === Mode.CIRCLE) {
+      sketchCoords = /** @type {LineCoordType} */ (this.sketchCoords_);
+    } else if (mode === Mode.POLYGON) {
+      sketchCoords =
+        this.sketchCoords_ && this.sketchCoords_.length ?
+        /** @type {PolyCoordType} */
+        (this.sketchCoords_)[0] : [];
+    } else {
+      return;
+    }
+    if (newDrawing) {
+      sketchCoords.shift();
+    }
+    // Remove last coordinate from sketch drawing (this coordinate follows cursor position)
+    sketchCoords.pop();
+    // Append coordinate list
+    for (var i = 0; i < coordinates.length; i++) {
+      this.addToDrawing_(coordinates[i]);
+    }
+    var ending = coordinates[coordinates.length - 1];
+    // Duplicate last coordinate for sketch drawing (cursor position)
+    this.addToDrawing_(ending);
+    this.modifyDrawing_(ending);
+  };
+  /**
+   * Initiate draw mode by starting from an existing geometry which will
+   * receive new additional points. This only works on features with
+   * `LineString` geometries, where the interaction will extend lines by adding
+   * points to the end of the coordinates array.
+   * This will change the original feature, instead of drawing a copy.
+   *
+   * The function will dispatch a `drawstart` event.
+   *
+   * @param {!Feature<LineString>} feature Feature to be extended.
+   * @api
+   */
+  Draw.prototype.extend = function (feature) {
+    var geometry = feature.getGeometry();
+    var lineString = geometry;
+    this.sketchFeature_ = feature;
+    this.sketchCoords_ = lineString.getCoordinates();
+    var last = this.sketchCoords_[this.sketchCoords_.length - 1];
+    this.finishCoordinate_ = last.slice();
+    this.sketchCoords_.push(last.slice());
+    this.sketchPoint_ = new Feature(new Point(last));
+    this.updateSketchFeatures_();
+    this.dispatchEvent(
+      new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_)
+    );
+  };
+  /**
+   * Redraw the sketch features.
+   * @private
+   */
+  Draw.prototype.updateSketchFeatures_ = function () {
+    var sketchFeatures = [];
+    if (this.sketchFeature_) {
+      sketchFeatures.push(this.sketchFeature_);
+    }
+    if (this.sketchLine_) {
+      sketchFeatures.push(this.sketchLine_);
+    }
+    if (this.sketchPoint_) {
+      sketchFeatures.push(this.sketchPoint_);
+    }
+    var overlaySource = this.overlay_.getSource();
+    overlaySource.clear(true);
+    overlaySource.addFeatures(sketchFeatures);
+  };
+  /**
+   * @private
+   */
+  Draw.prototype.updateState_ = function () {
+    var map = this.getMap();
+    var active = this.getActive();
+    if (!map || !active) {
+      this.abortDrawing();
+    }
+    this.overlay_.setMap(active ? map : null);
+  };
+  return Draw;
+})(PointerInteraction);
 /**
- * @return {import("../style/Style.js").StyleFunction} Styles.
+ * @return {import("ol/style/Style.js").StyleFunction} Styles.
  */
 function getDefaultStyleFunction() {
-    var styles = createEditingStyle();
-    return function(feature, resolution) {
-        return styles[feature.getGeometry().getType()];
-    };
+  var styles = createEditingStyle();
+  return function (feature, resolution) {
+    return styles[feature.getGeometry().getType()];
+  };
 }
 /**
  * Create a `geometryFunction` for `type: 'Circle'` that will create a regular
  * polygon with a user specified number of sides and start angle instead of a
- * `import("../geom/Circle.js").Circle` geometry.
+ * `import("ol/geom/Circle.js").Circle` geometry.
  * @param {number} [opt_sides] Number of sides of the regular polygon.
  *     Default is 32.
  * @param {number} [opt_angle] Angle of the first point in counter-clockwise
@@ -1072,30 +1217,35 @@
  * @api
  */
 export function createRegularPolygon(opt_sides, opt_angle) {
-    return function(coordinates, opt_geometry, projection) {
-        var center = fromUserCoordinate(
-            /** @type {LineCoordType} */
-            (coordinates)[0], projection);
-        var end = fromUserCoordinate(
-            /** @type {LineCoordType} */
-            (coordinates)[coordinates.length - 1], projection);
-        var radius = Math.sqrt(squaredCoordinateDistance(center, end));
-        var geometry = opt_geometry ?
-            /** @type {Polygon} */ (opt_geometry) :
-            fromCircle(new Circle(center), opt_sides);
-        var angle = opt_angle;
-        if (!opt_angle && opt_angle !== 0) {
-            var x = end[0] - center[0];
-            var y = end[1] - center[1];
-            angle = Math.atan2(y, x);
-        }
-        makeRegular(geometry, center, radius, angle);
-        var userProjection = getUserProjection();
-        if (userProjection) {
-            geometry.transform(projection, userProjection);
-        }
-        return geometry;
-    };
+  return function (coordinates, opt_geometry, projection) {
+    var center = fromUserCoordinate(
+      /** @type {LineCoordType} */
+      (coordinates)[0],
+      projection
+    );
+    var end = fromUserCoordinate(
+      /** @type {LineCoordType} */
+      (coordinates)[coordinates.length - 1],
+      projection
+    );
+    var radius = Math.sqrt(squaredCoordinateDistance(center, end));
+    var geometry = opt_geometry ?
+      /** @type {Polygon} */
+      (opt_geometry) :
+      fromCircle(new Circle(center), opt_sides);
+    var angle = opt_angle;
+    if (!opt_angle && opt_angle !== 0) {
+      var x = end[0] - center[0];
+      var y = end[1] - center[1];
+      angle = Math.atan2(y, x);
+    }
+    makeRegular(geometry, center, radius, angle);
+    var userProjection = getUserProjection();
+    if (userProjection) {
+      geometry.transform(projection, userProjection);
+    }
+    return geometry;
+  };
 }
 /**
  * Create a `geometryFunction` that will create a box-shaped polygon (aligned
@@ -1105,59 +1255,60 @@
  * @api
  */
 export function createBox() {
-    return function(coordinates, opt_geometry, projection) {
-        var extent = boundingExtent(
-            /** @type {LineCoordType} */
-            ([
-                coordinates[0],
-                coordinates[coordinates.length - 1],
-            ]).map(function(coordinate) {
-                return fromUserCoordinate(coordinate, projection);
-            }));
-        var boxCoordinates = [
-            [
-                getBottomLeft(extent),
-                getBottomRight(extent),
-                getTopRight(extent),
-                getTopLeft(extent),
-                getBottomLeft(extent),
-            ],
-        ];
-        var geometry = opt_geometry;
-        if (geometry) {
-            geometry.setCoordinates(boxCoordinates);
-        } else {
-            geometry = new Polygon(boxCoordinates);
-        }
-        var userProjection = getUserProjection();
-        if (userProjection) {
-            geometry.transform(projection, userProjection);
-        }
-        return geometry;
-    };
+  return function (coordinates, opt_geometry, projection) {
+    var extent = boundingExtent(
+      /** @type {LineCoordType} */
+      ([
+        coordinates[0],
+        coordinates[coordinates.length - 1],
+      ]).map(function (coordinate) {
+        return fromUserCoordinate(coordinate, projection);
+      })
+    );
+    var boxCoordinates = [
+      [
+        getBottomLeft(extent),
+        getBottomRight(extent),
+        getTopRight(extent),
+        getTopLeft(extent),
+        getBottomLeft(extent),
+      ],
+    ];
+    var geometry = opt_geometry;
+    if (geometry) {
+      geometry.setCoordinates(boxCoordinates);
+    } else {
+      geometry = new Polygon(boxCoordinates);
+    }
+    var userProjection = getUserProjection();
+    if (userProjection) {
+      geometry.transform(projection, userProjection);
+    }
+    return geometry;
+  };
 }
 /**
- * Get the drawing mode.  The mode for mult-part geometries is the same as for
+ * Get the drawing mode.  The mode for multi-part geometries is the same as for
  * their single-part cousins.
- * @param {import("../geom/GeometryType.js").default} type Geometry type.
+ * @param {import("ol/geom/GeometryType.js").default} type Geometry type.
  * @return {Mode} Drawing mode.
  */
 function getMode(type) {
-    switch (type) {
-        case GeometryType.POINT:
-        case GeometryType.MULTI_POINT:
-            return Mode.POINT;
-        case GeometryType.LINE_STRING:
-        case GeometryType.MULTI_LINE_STRING:
-            return Mode.LINE_STRING;
-        case GeometryType.POLYGON:
-        case GeometryType.MULTI_POLYGON:
-            return Mode.POLYGON;
-        case GeometryType.CIRCLE:
-            return Mode.CIRCLE;
-        default:
-            throw new Error('Invalid type: ' + type);
-    }
+  switch (type) {
+    case GeometryType.POINT:
+    case GeometryType.MULTI_POINT:
+      return Mode.POINT;
+    case GeometryType.LINE_STRING:
+    case GeometryType.MULTI_LINE_STRING:
+      return Mode.LINE_STRING;
+    case GeometryType.POLYGON:
+    case GeometryType.MULTI_POLYGON:
+      return Mode.POLYGON;
+    case GeometryType.CIRCLE:
+      return Mode.CIRCLE;
+    default:
+      throw new Error("Invalid type: " + type);
+  }
 }
 export default Draw;
-//# sourceMappingURL=Draw.js.map
\ No newline at end of file
+//# sourceMappingURL=Draw.js.map

--
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