isFileOrResourcePath and RESOURCE_PREFIX moved in utils

utils/utils-common.ts

@@ -1,5 +1,7 @@
 import types = require("utils/types");
 
+export var RESOURCE_PREFIX = "res://";
+
 export function copyFrom(source: any, target: any) {
     if (types.isDefined(source) && types.isDefined(target)) {
         var i: number;
@@ -50,4 +52,14 @@ export module layout {
     export function getMeasureSpecSize(spec: number): number {
         return (spec & ~MODE_MASK);
     }
+}
+
+export function isFileOrResourcePath(path: string): boolean {
+    if (!types.isString(path)) {
+        return false;
+    }
+
+    return path.indexOf("~/") === 0 ||  // relative to AppRoot
+        path.indexOf("/") === 0 ||      // absolute path
+        path.indexOf(RESOURCE_PREFIX) === 0;    // resource
 }

utils/utils.d.ts

@@ -2,6 +2,8 @@
     import colorModule = require("color");
     import view = require("ui/core/view");
 
+    export var RESOURCE_PREFIX: string;
+
     /**
      * Utility module related to layout.
      */
@@ -132,4 +134,10 @@
      * An utility function that invokes garbage collection on the JavaScript side.
      */
     export function GC();
+
+    /**
+     * Returns true if the specified path points to a resource or local file.
+     * @param path The path.
+     */
+    export function isFileOrResourcePath(path: string): boolean
 }