依赖文件

node_modules/cordova-plugin-googlemaps/www/encoding.js

@@ -0,0 +1,96 @@
+var LatLng = require('./LatLng');
+var common = require('./Common');
+
+/*****************************************************************************
+ * geometry Encode / decode points
+ * http://jsfiddle.net/8nzg7tta/
+ *****************************************************************************/
+//decode function
+function decodePath(encoded, precision) {
+  precision = precision || 5;
+  precision = Math.pow(10, -precision);
+  var len = encoded.length,
+    index = 0,
+    lat = 0,
+    lng = 0,
+    array = [];
+  while (index < len) {
+    var b, shift = 0,
+      result = 0;
+    do {
+      b = encoded.charCodeAt(index++) - 63;
+      result |= (b & 0x1f) << shift;
+      shift += 5;
+    } while (b >= 0x20);
+    var dlat = ((result & 1) ? ~(result >> 1) : (result >> 1));
+    lat += dlat;
+    shift = 0;
+    result = 0;
+    do {
+      b = encoded.charCodeAt(index++) - 63;
+      result |= (b & 0x1f) << shift;
+      shift += 5;
+    } while (b >= 0x20);
+    var dlng = ((result & 1) ? ~(result >> 1) : (result >> 1));
+    lng += dlng;
+    array.push(new LatLng(lat * precision, lng * precision));
+  }
+  return array;
+}
+
+//encode functions
+function encodePath(points) {
+  var plat = 0;
+  var plng = 0;
+  var encoded_points = '';
+
+  points = common.convertToPositionArray(points);
+
+  for (var i = 0; i < points.length; ++i) {
+    encoded_points += encodePoint(plat, plng, points[i].lat, points[i].lng);
+    plat = points[i].lat;
+    plng = points[i].lng;
+  }
+
+  return encoded_points;
+}
+
+function encodePoint(plat, plng, lat, lng) {
+  var late5 = Math.round(lat * 1e5);
+  var plate5 = Math.round(plat * 1e5);
+
+  var lnge5 = Math.round(lng * 1e5);
+  var plnge5 = Math.round(plng * 1e5);
+
+  var dlng = lnge5 - plnge5;
+  var dlat = late5 - plate5;
+
+  return encodeSignedNumber(dlat) + encodeSignedNumber(dlng);
+}
+
+function encodeSignedNumber(num) {
+  var sgn_num = num << 1;
+
+  if (num < 0) {
+    sgn_num = ~(sgn_num);
+  }
+
+  return (encodeNumber(sgn_num));
+}
+
+function encodeNumber(num) {
+  var encodeString = '';
+
+  while (num >= 0x20) {
+    encodeString += (String.fromCharCode((0x20 | (num & 0x1f)) + 63));
+    num >>= 5;
+  }
+
+  encodeString += (String.fromCharCode(num + 63));
+  return encodeString;
+}
+
+module.exports = {
+  decodePath: decodePath,
+  encodePath: encodePath
+};