Updated to support other indirect resource strings (from SHLoadIndirectString docs)

Windows.Shell/IndirectResource.cs

@@ -1,10 +1,13 @@
 using System.ComponentModel;
+using Vanara.PInvoke;
 
 namespace Vanara.Windows.Shell
 {
 	/// <summary>Wraps a resource reference used by some Shell classes.</summary>
 	public abstract class IndirectResource
 	{
+		private string fn;
+
 		/// <summary>Initializes a new instance of the <see cref="IndirectResource"/> class.</summary>
 		public IndirectResource() { }
 
@@ -14,30 +17,103 @@ namespace Vanara.Windows.Shell
 		/// If this number is positive, this is the index of the resource in the module file. If negative, the absolute value of the number
 		/// is the resource ID of the resource in the module file.
 		/// </param>
-		public IndirectResource(string module, int resourceIdOrIndex)
+		/// <param name="versionModifier">The version modifier. This value can be, and usually is, <see langword="null"/>.</param>
+		public IndirectResource(string module, int resourceIdOrIndex, string versionModifier = null)
 		{
 			ModuleFileName = module;
 			ResourceId = resourceIdOrIndex;
+			VersionModifier = versionModifier;
 		}
 
 		/// <summary>Returns true if this location is valid.</summary>
 		/// <value><c>true</c> if this location is valid; otherwise, <c>false</c>.</value>
 		[Browsable(false)]
-		public virtual bool IsValid => ResourceId != 0 && System.IO.File.Exists(ModuleFileName);
+		public virtual bool IsValid
+		{
+			get
+			{
+				return ResourceId != null &&
+					((ModuleFileName != null && System.IO.File.Exists(ModuleFileName)) ||
+					(PackageResourceIndexFile != null && System.IO.File.Exists(PackageResourceIndexFile)));
+			}
+		}
 
 		/// <summary>Gets or sets the module file name.</summary>
 		/// <value>The module file name.</value>
-		public string ModuleFileName { get; set; }
+		[DefaultValue(null)]
+		public string ModuleFileName
+		{
+			get
+			{
+				if (fn is null) return null;
+				var ext = System.IO.Path.GetExtension(fn);
+				return string.IsNullOrEmpty(ext) || ext.Equals(".pri", System.StringComparison.InvariantCultureIgnoreCase) ? null : fn;
+			}
+			set => fn = value;
+		}
+
+		/// <summary>
+		/// Gets or sets the name of the package. The string is extracted from the Resources.pri file stored in the app's root directory of
+		/// the package identified by PackageFullName, using the resource as a locator. The retrieved string is copied to the output buffer
+		/// and the function returns S_OK. The string is extracted based on the app's environment or ResourceContext. Note: This string must
+		/// refer to a package installed for the current user.If it does not, the call will fail.
+		/// </summary>
+		/// <value>The name of the package. Something like "Microsoft.Camera_6.2.8376.0_x64__8wekyb3d8bbwe".</value>
+		[DefaultValue(null)]
+		public string PackageName
+		{
+			get
+			{
+				if (fn is null) return null;
+				var ext = System.IO.Path.GetExtension(fn);
+				return string.IsNullOrEmpty(ext) ? fn : null;
+			}
+			set => fn = value;
+		}
+
+		/// <summary>
+		/// Gets or sets the package resource index file name. The Package Resource Index (PRI) is a binary format introduced in Windows 8
+		/// that contains indexed resources or references to resources. The .pri file is bundled as part of an app's package. For more
+		/// information on .pri files, see Creating and retrieving resources in Windows Store apps. The string is extracted from the.pri file
+		/// named, using the resource as a locator.The retrieved string is copied to the output buffer and the function returns S_OK. The
+		/// string is extracted based on the current Shell environment or ResourceContext.
+		/// </summary>
+		/// <value>The package resource index file name. Something like "C:\Program Files\WindowsApps\Microsoft.Camera_6.2.8376.0_x64__8wekyb3d8bbwe\resources.pri".</value>
+		[DefaultValue(null)]
+		public string PackageResourceIndexFile
+		{
+			get
+			{
+				if (fn is null) return null;
+				var ext = System.IO.Path.GetExtension(fn);
+				return ext.Equals(".pri", System.StringComparison.InvariantCultureIgnoreCase) ? fn : null;
+			}
+			set => fn = value;
+		}
 
 		/// <summary>Gets or sets the resource index or resource ID.</summary>
 		/// <value>
 		/// If this number is positive, this is the index of the resource in the module file. If negative, the absolute value of the number
 		/// is the resource ID of the icon in the module file.
 		/// </value>
-		public int ResourceId { get; set; }
+		[DefaultValue(null)]
+		public SafeResourceId ResourceId { get; set; }
+
+		/// <summary>Gets or sets the version modifier. This value is rarely used.</summary>
+		/// <value>The version modifier (e.g. "v2").</value>
+		[DefaultValue(null)]
+		public string VersionModifier { get; set; }
 
 		/// <summary>Returns a <see cref="System.String"/> that represents this instance.</summary>
 		/// <returns>A <see cref="System.String"/> that represents this instance.</returns>
-		public override string ToString() => IsValid ? $"@{ModuleFileName},{ResourceId}" : string.Empty;
+		public override string ToString()
+		{
+			if (string.IsNullOrEmpty(fn) || ResourceId is null)
+				return string.Empty;
+			var res = ResourceId.IsIntResource ? ResourceId.id.ToString() : ResourceId.ToString();
+			if (ModuleFileName != null)
+				return IsValid ? $"@{ModuleFileName},{res}" : string.Empty;
+			return $"@{{{fn}?{res}}}";
+		}
 	}
 }