Clearer tile method names.

lib/OpenLayers/Tile/UTFGrid.js

@@ -179,32 +179,35 @@ OpenLayers.Tile.UTFGrid = OpenLayers.Class(OpenLayers.Tile, {
         var id;
         if (this.json) {
             var resolution = this.utfgridResolution;
-            var code = this.resolveCode(this.json.grid[ 
-                    Math.floor((j) / resolution) 
-                ].charCodeAt(
-                    Math.floor((i) / resolution)
-                ));
-            id = this.json.keys[code];
+            var row = Math.floor(j / resolution);
+            var col = Math.floor(i / resolution);
+            var charCode = this.json.grid[row].charCodeAt(col);
+            var index = this.indexFromCharCode(charCode);
+            id = this.json.keys[index];
         }
         return id;
     },
     
     /**
-     * Method: resolveCode
-     * Resolve the UTF-8 encoding stored in grids to simple number values.  
-     *     See the UTFGrid spec for details.
+     * Method: indexFromCharCode
+     * Given a character code for one of the UTFGrid "grid" characters, 
+     *     resolve the integer index for the feature id in the UTFGrid "keys"
+     *     array.
      *
      * Parameters:
-     * key - {Integer}
+     * charCode - {Integer}
      *
      * Returns:
-     * {Integer} Adjusted key for non-escaped chars
+     * {Integer} Index for the feature id from the keys array.
      */
-    resolveCode: function(key) {
-        if (key >= 93) key--;
-        if (key >= 35) key--;
-        key -= 32;
-        return key;
+    indexFromCharCode: function(charCode) {
+        if (charCode >= 93) {
+            charCode--;
+        }
+        if (charCode >= 35) {
+            charCode --;
+        }
+        return charCode - 32;
     },
     
     /**