Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/VirtualPathUtility.cs

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+//------------------------------------------------------------------------------
+// <copyright file="VirtualPathUtility.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+/*
+ * VirtualPathUtility class
+ *
+ * Copyright (c) 2004 Microsoft Corporation
+ */
+
+namespace System.Web {
+
+using System.Web.Util;
+using System.Security.Permissions;
+
+/*
+ * Code to perform virtual path operations
+ */
+public static class VirtualPathUtility {
+
+    /* Discover virtual path type */
+
+    public static bool IsAbsolute(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.Create(virtualPath);
+        return !virtualPathObject.IsRelative && virtualPathObject.VirtualPathStringIfAvailable != null;
+    }
+
+    public static bool IsAppRelative(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.Create(virtualPath);
+        return virtualPathObject.VirtualPathStringIfAvailable == null;
+    }
+
+    /* Convert between virtual path types */
+    public static string ToAppRelative(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+        return virtualPathObject.AppRelativeVirtualPathString;
+    }
+
+    public static string ToAppRelative(string virtualPath, string applicationPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+
+        // If it was already app relative, just return it
+        if (virtualPathObject.AppRelativeVirtualPathStringIfAvailable != null)
+            return virtualPathObject.AppRelativeVirtualPathStringIfAvailable;
+
+        VirtualPath appVirtualPath = VirtualPath.CreateAbsoluteTrailingSlash(applicationPath);
+
+        return UrlPath.MakeVirtualPathAppRelative(virtualPathObject.VirtualPathString,
+            appVirtualPath.VirtualPathString, true /*nullIfNotInApp*/);
+    }
+
+    public static string ToAbsolute(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+        return virtualPathObject.VirtualPathString;
+    }
+
+    public static string ToAbsolute(string virtualPath, string applicationPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+
+        // If it was already absolute, just return it
+        if (virtualPathObject.VirtualPathStringIfAvailable != null)
+            return virtualPathObject.VirtualPathStringIfAvailable;
+
+        VirtualPath appVirtualPath = VirtualPath.CreateAbsoluteTrailingSlash(applicationPath);
+
+        return UrlPath.MakeVirtualPathAppAbsolute(virtualPathObject.AppRelativeVirtualPathString,
+            appVirtualPath.VirtualPathString);
+    }
+
+
+    /* Get pieces of virtual path */
+    public static string GetFileName(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+        return virtualPathObject.FileName;
+    }
+
+    public static string GetDirectory(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+
+        virtualPathObject = virtualPathObject.Parent;
+        if (virtualPathObject == null)
+            return null;
+
+        return virtualPathObject.VirtualPathStringWhicheverAvailable;
+    }
+
+    public static string GetExtension(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.Create(virtualPath);
+        return virtualPathObject.Extension;
+    }
+
+    /* Canonicalize virtual paths */
+    public static string AppendTrailingSlash(string virtualPath) {
+        return UrlPath.AppendSlashToPathIfNeeded(virtualPath);
+    }
+
+    public static string RemoveTrailingSlash(string virtualPath) {
+        return UrlPath.RemoveSlashFromPathIfNeeded(virtualPath);
+    }
+
+// Removing Reduce per DevDiv 43118
+#if OLD
+    public static string Reduce(string virtualPath) {
+        VirtualPath virtualPathObject = VirtualPath.CreateNonRelative(virtualPath);
+        return virtualPathObject.VirtualPathString;
+    }
+#endif
+
+    /* Work with multiple virtual paths */
+    public static string Combine(string basePath, string relativePath) {
+        VirtualPath virtualPath = VirtualPath.Combine(VirtualPath.CreateNonRelative(basePath),
+            VirtualPath.Create(relativePath));
+        return virtualPath.VirtualPathStringWhicheverAvailable;
+    }
+
+    public static string MakeRelative(string fromPath, string toPath) {
+        return UrlPath.MakeRelative(fromPath, toPath);
+    }
+}
+
+
+}