Merge pull request #916 from Turbo87/bounds

Added extendXY() method to Bounds class

Author: ahocevar

lib/OpenLayers/BaseTypes/Bounds.js

@@ -355,39 +355,59 @@ OpenLayers.Bounds = OpenLayers.Class({
      *     object.
      */
     extend:function(object) {
-        var bounds = null;
         if (object) {
-            // clear cached center location
             switch(object.CLASS_NAME) {
-                case "OpenLayers.LonLat":    
-                    bounds = new OpenLayers.Bounds(object.lon, object.lat,
-                                                    object.lon, object.lat);
+                case "OpenLayers.LonLat":
+                    this.extendXY(object.lon, object.lat);
                     break;
                 case "OpenLayers.Geometry.Point":
-                    bounds = new OpenLayers.Bounds(object.x, object.y,
-                                                    object.x, object.y);
+                    this.extendXY(object.x, object.y);
                     break;
-                    
-                case "OpenLayers.Bounds":    
-                    bounds = object;
+
+                case "OpenLayers.Bounds":
+                    // clear cached center location
+                    this.centerLonLat = null;
+
+                    if ( (this.left == null) || (object.left < this.left)) {
+                        this.left = object.left;
+                    }
+                    if ( (this.bottom == null) || (object.bottom < this.bottom) ) {
+                        this.bottom = object.bottom;
+                    }
+                    if ( (this.right == null) || (object.right > this.right) ) {
+                        this.right = object.right;
+                    }
+                    if ( (this.top == null) || (object.top > this.top) ) {
+                        this.top = object.top;
+                    }
                     break;
             }
-    
-            if (bounds) {
-                this.centerLonLat = null;
-                if ( (this.left == null) || (bounds.left < this.left)) {
-                    this.left = bounds.left;
-                }
-                if ( (this.bottom == null) || (bounds.bottom < this.bottom) ) {
-                    this.bottom = bounds.bottom;
-                } 
-                if ( (this.right == null) || (bounds.right > this.right) ) {
-                    this.right = bounds.right;
-                }
-                if ( (this.top == null) || (bounds.top > this.top) ) { 
-                    this.top = bounds.top;
-                }
-            }
+        }
+    },
+
+    /**
+     * APIMethod: extendXY
+     * Extend the bounds to include the XY coordinate specified.
+     *
+     * Parameters:
+     * x - {number} The X part of the the coordinate.
+     * y - {number} The Y part of the the coordinate.
+     */
+    extendXY:function(x, y) {
+        // clear cached center location
+        this.centerLonLat = null;
+
+        if ((this.left == null) || (x < this.left)) {
+            this.left = x;
+        }
+        if ((this.bottom == null) || (y < this.bottom)) {
+            this.bottom = y;
+        }
+        if ((this.right == null) || (x > this.right)) {
+            this.right = x;
+        }
+        if ((this.top == null) || (y > this.top)) {
+            this.top = y;
         }
     },