依赖文件

2025-03-20 17:35:53 +08:00
parent 634fe57349
commit 021ffc6052
1134 changed files with 137518 additions and 132 deletions
@@ -0,0 +1,130 @@
+var LatLng = require('./LatLng');
+
+/*****************************************************************************
+ * LatLngBounds Class
+ *****************************************************************************/
+var LatLngBounds = function () {
+  Object.defineProperty(this, 'type', {
+    value: 'LatLngBounds',
+    writable: false
+  });
+
+  var args = [];
+  if (arguments.length === 1 &&
+    typeof arguments[0] === 'object' &&
+    'push' in arguments[0]) {
+    args = arguments[0];
+  } else {
+    args = Array.prototype.slice.call(arguments, 0);
+  }
+
+  for (var i = 0; i < args.length; i++) {
+    if (args[i] && 'lat' in args[i] && 'lng' in args[i]) {
+      this.extend(args[i]);
+    }
+  }
+};
+
+LatLngBounds.prototype.northeast = null;
+LatLngBounds.prototype.southwest = null;
+
+LatLngBounds.prototype.toString = function () {
+  return '{"southwest":' + this.southwest.toString() + ', "northeast":' + this.northeast.toString() + '}';
+};
+LatLngBounds.prototype.toUrlValue = function (precision) {
+  precision = precision || 6;
+  return '[' + this.southwest.toUrlValue(precision) + ',' + this.northeast.toUrlValue(precision) + ']';
+};
+
+LatLngBounds.prototype.extend = function (latLng) {
+  if (latLng && 'lat' in latLng && 'lng' in latLng) {
+    if (!this.southwest && !this.northeast) {
+      this.southwest = latLng;
+      this.northeast = latLng;
+    } else {
+      var south = Math.min(latLng.lat, this.southwest.lat);
+      var north = Math.max(latLng.lat, this.northeast.lat);
+
+      var west = this.southwest.lng,
+        east = this.northeast.lng;
+
+      if (west > 0 && east < 0) {
+        if (latLng.lng > 0) {
+          west = Math.min(latLng.lng, west);
+        } else {
+          east = Math.max(latLng.lng, east);
+        }
+      } else {
+
+        west = Math.min(latLng.lng, this.southwest.lng);
+        east = Math.max(latLng.lng, this.northeast.lng);
+      }
+
+      delete this.southwest;
+      delete this.northeast;
+      this.southwest = new LatLng(south, west);
+      this.northeast = new LatLng(north, east);
+    }
+  }
+};
+
+LatLngBounds.prototype.getCenter = function () {
+  var centerLat = (this.southwest.lat + this.northeast.lat) / 2;
+
+  var swLng = this.southwest.lng;
+  var neLng = this.northeast.lng;
+  var sumLng = swLng + neLng;
+  var centerLng = sumLng / 2;
+
+  if ((swLng > 0 && neLng < 0 && sumLng < 180)) {
+    centerLng += sumLng > 0 ? -180 : 180;
+  }
+  return new LatLng(centerLat, centerLng);
+};
+LatLngBounds.prototype.contains = function (latLng) {
+  if (!latLng || !('lat' in latLng) || !('lng' in latLng)) {
+    return false;
+  }
+  var y = latLng.lat,
+    x = latLng.lng;
+
+  var y90 = y + 90;
+  var south = this.southwest.lat,
+    north = this.northeast.lat,
+    west = this.southwest.lng,
+    east = this.northeast.lng;
+  var south90 = south + 90,
+    north90 = north + 90;
+
+  var containX = false,
+    containY = false;
+
+  if (west <= 0 && east <= 0 && west <= east) {
+    if (x > 0) {
+      containX = false;
+    } else {
+      containX = (west <= x && x <= east);
+    }
+  } else if (east <= 0 && west > 0 && east <= west) {
+    if (x > 0) {
+      containX = (x >= west && x <= 180);
+    } else {
+      containX = (-180 <= x && x <= west);
+    }
+  } else if (west <= 0 && east > 0 && west <= east) {
+    if (x < 0) {
+      containX = (west <= x && x <= 0);
+    } else {
+      containX = (x >= 0 && x <= east);
+    }
+  } else {
+    containX = (west <= x && x <= east);
+  }
+
+  containY = (south90 <= y90 && y90 <= north90) || //#a
+    (south >= 0 && north <= 0 && ((south <= y && y <= 90) || (y >= -90 && y <= north))); // #d
+
+  return containX && containY;
+};
+
+module.exports = LatLngBounds;