1  // Copyright (c) Microsoft Corporation
 2  // The Microsoft Corporation licenses this file to you under the MIT license.
 3  // See the LICENSE file in the project root for more information.
 4  
 5  using System.Collections.Generic;
 6  using System.Runtime.InteropServices;
 7  using System.Runtime.InteropServices.ComTypes;
 8  
 9  using Wox.Plugin.Common.Win32;
10  
11  namespace Microsoft.Plugin.Program.Programs
12  {
13      public static class AppxPackageHelper
14      {
15          private static readonly IAppxFactory AppxFactory = (IAppxFactory)new AppxFactory();
16  
17          // This function returns a list of attributes of applications
18          public static IEnumerable<IAppxManifestApplication> GetAppsFromManifest(IStream stream)
19          {
20              var reader = AppxFactory.CreateManifestReader(stream);
21              var manifestApps = reader.GetApplications();
22  
23              while (manifestApps.GetHasCurrent())
24              {
25                  var manifestApp = manifestApps.GetCurrent();
26                  var hr = manifestApp.GetStringValue("AppListEntry", out var appListEntry);
27                  _ = CheckHRAndReturnOrThrow(hr, appListEntry);
28                  if (appListEntry != "none")
29                  {
30                      yield return manifestApp;
31                  }
32  
33                  manifestApps.MoveNext();
34              }
35          }
36  
37          public static T CheckHRAndReturnOrThrow<T>(HRESULT hr, T result)
38          {
39              if (hr != HRESULT.S_OK)
40              {
41                  Marshal.ThrowExceptionForHR((int)hr);
42              }
43  
44              return result;
45          }
46      }
47  }