Add support(point, polygon) for AMap(高德 from China)

wicket-amap.js

@@ -0,0 +1,56 @@
+(function (Wkt) {
+
+  Wkt.Wkt.prototype.construct = {
+    point: function(config) {
+      var opt = config || {};
+      opt.position = new AMap.LngLat(this.components[0].x, this.components[0].y);
+      return new AMap.Marker(opt);
+    },
+
+    polygon: function (config) {
+      var opt = config || {};
+      opt.path = this.components[0].map(function(p) {
+        return new AMap.LngLat(p.x, p.y);
+      });
+      opt.path.pop();           // unclosure
+      return new AMap.Polygon(opt);
+    }
+  };
+
+  Wkt.Wkt.prototype.deconstruct = deconstruct;
+
+  function deconstruct(obj) {
+    if (obj.constructor === AMap.Marker) {
+      var p = obj.getPosition();
+      return {
+        type: 'point',
+        components: [{
+          x: p.getLng(),
+          y: p.getLat()
+        }]
+      };
+    }
+
+    if (obj.constructor === AMap.Polygon) {
+      var verts = obj.getPath().map(function(p) {
+        return {
+          x: p.getLng(),
+          y: p.getLat()
+        };
+      });
+      verts.push({              // closure
+        x: verts[0].x,
+        y: verts[0].y
+      });
+
+      return {
+        type: 'polygon',
+        components: [verts]
+      };
+    }
+
+    console.error('Unsupported geometry class');
+    return null;
+  }
+
+}(Wkt || require('./wicket')));