Use external launcher to set Files as default explorer

Files.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.1.31903.286
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.31911.196
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Files.Launcher", "src\Files.Launcher\Files.Launcher.csproj", "{533F9E86-EE0A-4FCB-B70C-F29532C1B787}"
 	ProjectSection(ProjectDependencies) = postProject
@@ -30,6 +30,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Files.UI", "Files.UI", "{A1
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Files.Backend", "src\Files.Backend\Files.Backend.csproj", "{4CFE0BBC-8D07-49A0-8B10-4EDD61ABCF57}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "FilesLauncher", "src\Files.OpenDialog\FilesLauncher\FilesLauncher.vcxproj", "{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|arm64 = Debug|arm64
@@ -142,6 +144,16 @@ Global
 		{4CFE0BBC-8D07-49A0-8B10-4EDD61ABCF57}.Release|x64.Build.0 = Release|x64
 		{4CFE0BBC-8D07-49A0-8B10-4EDD61ABCF57}.Release|x86.ActiveCfg = Release|x86
 		{4CFE0BBC-8D07-49A0-8B10-4EDD61ABCF57}.Release|x86.Build.0 = Release|x86
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Debug|arm64.ActiveCfg = Debug|Win32
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Debug|x64.ActiveCfg = Debug|x64
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Debug|x64.Build.0 = Debug|x64
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Debug|x86.ActiveCfg = Debug|Win32
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Debug|x86.Build.0 = Debug|Win32
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Release|arm64.ActiveCfg = Release|Win32
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Release|x64.ActiveCfg = Release|x64
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Release|x64.Build.0 = Release|x64
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Release|x86.ActiveCfg = Release|Win32
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07}.Release|x86.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -157,6 +169,7 @@ Global
 		{B7E43D1F-AC8B-4958-95D5-A06CDD1FEACD} = {481DE2EA-E6CE-4A9C-A220-3B543B95AAA1}
 		{A188C26B-E731-4E0B-9D17-D21CEBD9B43F} = {A74DCE98-A744-4D71-A2B1-7EE4FED0936B}
 		{4CFE0BBC-8D07-49A0-8B10-4EDD61ABCF57} = {A188C26B-E731-4E0B-9D17-D21CEBD9B43F}
+		{25FD5045-6D4C-4DD0-B3AC-613AB59CBB07} = {0175B70C-1E29-4A3F-AA4F-C2017B040EF0}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {0E62043C-A7A1-4982-9EC9-4CDB2939B776}

src/Files.Launcher/Files.Launcher.csproj

@@ -30,6 +30,7 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Files.Shared\Files.Shared.csproj" />
+    <Content Include="Assets\FilesOpenDialog\FilesLauncher.exe" />
     <Content Include="Assets\FilesOpenDialog\SetFilesAsDefault.reg">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </Content>
@@ -45,4 +46,7 @@
   <ItemGroup>
     <Compile Remove="FolderNames.cs" />
   </ItemGroup>
+  <ItemGroup>
+    <None Remove="Assets\FilesOpenDialog\FilesLauncher.exe" />
+  </ItemGroup>
 </Project>

src/Files.Launcher/MessageHandlers/Win32MessageHandler.cs

@@ -31,7 +31,7 @@ private static void DetectIsSetAsDefaultFileManager()
         {
             using var subkey = Registry.ClassesRoot.OpenSubKey(@"Folder\shell\open\command");
             var command = (string)subkey?.GetValue(string.Empty);
-            ApplicationData.Current.LocalSettings.Values["IsSetAsDefaultFileManager"] = !string.IsNullOrEmpty(command) && command.Contains("files.exe");
+            ApplicationData.Current.LocalSettings.Values["IsSetAsDefaultFileManager"] = !string.IsNullOrEmpty(command) && command.Contains("FilesLauncher.exe");
         }
 
         private static void DetectIsSetAsOpenFileDialog()
@@ -159,6 +159,22 @@ public async Task ParseArgumentsAsync(PipeStream connection, Dictionary<string,
                                 return;
                             }
                         }
+
+                        var dataPath = Environment.ExpandEnvironmentVariables("%LocalAppData%\\Files");
+                        if (enable)
+                        {
+                            if (!Win32API.RunPowershellCommand($"-command \"New-Item -Force -Path {dataPath} -ItemType Directory; Copy-Item -Filter *.* -Path '{destFolder}\\*' -Recurse -Force -Destination '{dataPath}'\"", false))
+                            {
+                                // Error copying files
+                                DetectIsSetAsDefaultFileManager();
+                                await Win32API.SendMessageAsync(connection, new ValueSet() { { "Success", false } }, message.Get("RequestID", (string)null));
+                                return;
+                            }
+                        }
+                        else
+                        {
+                            Win32API.RunPowershellCommand($"-command \"Remove-Item -Path '{dataPath}' -Recurse -Force\"", false);
+                        }
 
                         try
                         {

src/Files.OpenDialog/CustomOpenDialog/CustomOpenDialog.vcxproj

@@ -30,7 +30,7 @@
     <VCProjectVersion>16.0</VCProjectVersion>
     <ProjectGuid>{A2FF3F3B-8EBC-4108-B99D-1476B7876656}</ProjectGuid>
     <Keyword>AtlProj</Keyword>
-    <WindowsTargetPlatformVersion>10.0.19041.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">

src/Files.OpenDialog/FilesLauncher/DocumentServiceProvider.cpp

@@ -0,0 +1,57 @@
+// Copyright (C) Explorer++ Project
+// SPDX-License-Identifier: GPL-3.0-only
+// See LICENSE in the top level directory
+
+#include "DocumentServiceProvider.h"
+
+// IDispatch
+// Note that none of these methods require any implementation. When attempting to find a shell
+// window, the shell requests the IDispatch interface, but doesn't actually call any methods on it.
+IFACEMETHODIMP DocumentServiceProvider::GetTypeInfoCount(UINT *typeInfoCount)
+{
+	UNREFERENCED_PARAMETER(typeInfoCount);
+
+	return E_NOTIMPL;
+}
+
+IFACEMETHODIMP DocumentServiceProvider::GetTypeInfo(UINT type, LCID localeId, ITypeInfo **typeInfo)
+{
+	UNREFERENCED_PARAMETER(type);
+	UNREFERENCED_PARAMETER(localeId);
+	UNREFERENCED_PARAMETER(typeInfo);
+
+	return E_NOTIMPL;
+}
+
+IFACEMETHODIMP DocumentServiceProvider::GetIDsOfNames(
+	REFIID riid, LPOLESTR *names, UINT numNames, LCID localeId, DISPID *dispId)
+{
+	UNREFERENCED_PARAMETER(riid);
+	UNREFERENCED_PARAMETER(names);
+	UNREFERENCED_PARAMETER(numNames);
+	UNREFERENCED_PARAMETER(localeId);
+	UNREFERENCED_PARAMETER(dispId);
+
+	return E_NOTIMPL;
+}
+
+IFACEMETHODIMP DocumentServiceProvider::Invoke(DISPID dispIdMember, REFIID riid, LCID localeId,
+	WORD flags, DISPPARAMS *dispParams, VARIANT *varResult, EXCEPINFO *exceptionInfo, UINT *argErr)
+{
+	UNREFERENCED_PARAMETER(dispIdMember);
+	UNREFERENCED_PARAMETER(riid);
+	UNREFERENCED_PARAMETER(localeId);
+	UNREFERENCED_PARAMETER(flags);
+	UNREFERENCED_PARAMETER(dispParams);
+	UNREFERENCED_PARAMETER(varResult);
+	UNREFERENCED_PARAMETER(exceptionInfo);
+	UNREFERENCED_PARAMETER(argErr);
+
+	return E_NOTIMPL;
+}
+
+// IServiceProvider
+IFACEMETHODIMP DocumentServiceProvider::QueryService(REFGUID guidService, REFIID riid, void **ppv)
+{
+	return ServiceProviderBase::QueryService(guidService, riid, ppv);
+}

src/Files.OpenDialog/FilesLauncher/DocumentServiceProvider.h

@@ -0,0 +1,25 @@
+// Copyright (C) Explorer++ Project
+// SPDX-License-Identifier: GPL-3.0-only
+// See LICENSE in the top level directory
+
+#pragma once
+
+#include "ServiceProviderBase.h"
+#include <winrt/base.h>
+
+class DocumentServiceProvider :
+	public winrt::implements<DocumentServiceProvider, IDispatch, IServiceProvider>,
+	public ServiceProviderBase
+{
+public:
+	// IDispatch
+	IFACEMETHODIMP GetTypeInfoCount(UINT *typeInfoCount);
+	IFACEMETHODIMP GetTypeInfo(UINT type, LCID localeId, ITypeInfo **typeInfo);
+	IFACEMETHODIMP GetIDsOfNames(
+		REFIID riid, LPOLESTR *names, UINT numNames, LCID localeId, DISPID *dispId);
+	IFACEMETHODIMP Invoke(DISPID dispIdMember, REFIID riid, LCID localeId, WORD flags,
+		DISPPARAMS *dispParams, VARIANT *varResult, EXCEPINFO *exceptionInfo, UINT *argErr);
+
+	// IServiceProvider
+	IFACEMETHODIMP QueryService(REFGUID guidService, REFIID riid, void **ppv);
+};