MSIX: implement initial version of notifications library (#1178)

2025-01-18 06:29:44 +08:00 · 2020-02-04 19:41:00 +03:00 · 2020-02-04 19:41:00 +03:00 · 5089729b18
commit 5089729b18
parent b41d2d64cb
28 changed files with 794 additions and 0 deletions
--- a/PowerToys.sln
+++ b/PowerToys.sln
@ -88,6 +88,10 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "PowerRenameUWPUI", "src\mod
 		{0E072714-D127-460B-AFAD-B4C40B412798} = {0E072714-D127-460B-AFAD-B4C40B412798}
 	EndProjectSection
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "notifications", "src\common\notifications_winrt\notifications.vcxproj", "{0B593A6C-4143-4337-860E-DB5710FB87DB}"
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "notifications_dll", "src\common\notifications\notifications_dll.vcxproj", "{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}"
+EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "windowwalker", "windowwalker", "{8DC78AF7-DC3E-4C57-A8FB-7E347DE74A03}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Window Walker", "src\modules\windowwalker\app\Window Walker\Window Walker.csproj", "{B9BDF8BE-FED7-49B5-A7AE-DD4D1CA2D9EB}"
@ -168,6 +172,14 @@ Global
 		{0485F45C-EA7A-4BB5-804B-3E8D14699387}.Debug|x64.Build.0 = Debug|x64
 		{0485F45C-EA7A-4BB5-804B-3E8D14699387}.Release|x64.ActiveCfg = Release|x64
 		{0485F45C-EA7A-4BB5-804B-3E8D14699387}.Release|x64.Build.0 = Release|x64
+		{0B593A6C-4143-4337-860E-DB5710FB87DB}.Debug|x64.ActiveCfg = Debug|x64
+		{0B593A6C-4143-4337-860E-DB5710FB87DB}.Debug|x64.Build.0 = Debug|x64
+		{0B593A6C-4143-4337-860E-DB5710FB87DB}.Release|x64.ActiveCfg = Release|x64
+		{0B593A6C-4143-4337-860E-DB5710FB87DB}.Release|x64.Build.0 = Release|x64
+		{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}.Debug|x64.ActiveCfg = Debug|x64
+		{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}.Debug|x64.Build.0 = Debug|x64
+		{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}.Release|x64.ActiveCfg = Release|x64
+		{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}.Release|x64.Build.0 = Release|x64
 		{B9BDF8BE-FED7-49B5-A7AE-DD4D1CA2D9EB}.Debug|x64.ActiveCfg = Debug|x64
 		{B9BDF8BE-FED7-49B5-A7AE-DD4D1CA2D9EB}.Debug|x64.Build.0 = Debug|x64
 		{B9BDF8BE-FED7-49B5-A7AE-DD4D1CA2D9EB}.Release|x64.ActiveCfg = Release|x64
@ -199,6 +211,8 @@ Global
 		{2151F984-E006-4A9F-92EF-C6DDE3DC8413} = {89E20BCE-EB9C-46C8-8B50-E01A82E6FDC3}
 		{64A80062-4D8B-4229-8A38-DFA1D7497749} = {BEEAB7F2-FFF6-45AB-9CDB-B04CC0734B88}
 		{0485F45C-EA7A-4BB5-804B-3E8D14699387} = {89E20BCE-EB9C-46C8-8B50-E01A82E6FDC3}
+		{0B593A6C-4143-4337-860E-DB5710FB87DB} = {1AFB6476-670D-4E80-A464-657E01DFF482}
+		{031AC72E-FA28-4AB7-B690-6F7B9C28AA73} = {1AFB6476-670D-4E80-A464-657E01DFF482}
 		{8DC78AF7-DC3E-4C57-A8FB-7E347DE74A03} = {4574FDD0-F61D-4376-98BF-E5A1262C11EC}
 		{B9BDF8BE-FED7-49B5-A7AE-DD4D1CA2D9EB} = {8DC78AF7-DC3E-4C57-A8FB-7E347DE74A03}
 		{51D3BD1F-07A8-48EB-B2A0-0A249CD4E1A6} = {8DC78AF7-DC3E-4C57-A8FB-7E347DE74A03}
--- a/doc/devdocs/common.md
+++ b/doc/devdocs/common.md
@ -43,3 +43,67 @@ Helper methods for the settings.

 #### Start visible helper: [header](/src/common/start_visible.h) [source](/src/common/start_visible.cpp)
 Contains function to test if the Start menu is visible.
+
+# Toast Notifications
+
+#### Notifications API [header](/src/common/notifications.h) [source](/src/common/notifications.cpp)
+To use UWP-style toast notifications, simply include the header and call one of these functions:
+
+```cpp
+    void show_toast(std::wstring_view message);       // #1
+    
+    void show_toast_background_activated(             // #2
+      std::wstring_view message,
+      std::wstring_view background_handler_id,
+      std::vector<std::wstring_view> button_labels);
+```
+We might add more functions in the future if the need arises, e.g. `show_toast_xml` which will accept raw XML for rich customization.
+
+Description:
+- `#1` is for sending simple notifications without any callbacks or buttons
+- `#2` is capable of showing a toast with multiple buttons and background activation
+- `message` is a plain-text argument
+
+Implement a toast activation handler/callback as a function in [handler_functions.cpp](/src/common/notifications_winrt/handler_functions.cpp) and register its `background_handler_id` via `handlers_map`, e.g.:
+
+```cpp
+// Your .cpp where you'd like to show a toast
+
+#include <common/notifications.h>
+
+void some_func() {
+// ...
+  notifications::show_toast_background_activated(
+    L"Toast message!",                                                  // text displayed in a toast
+    L"awesome_toast",                                                   // activation handler id
+    {L"Press me!", L"Also could press me!", L"I'm here to be pressed!"} // buttons in a toast
+  );
+```
+
+```cpp
+// handler_functions.cpp
+void awesome_toast_handler(IBackgroundTaskInstance, const size_t button_id)
+{
+  switch(button_id)
+  {
+    case 0:
+      // handle "Press me!" button click
+    case 1:
+      // handle "Also could press me!" button click
+    case 2:
+      // handle "I'm here to be pressed!" button click
+  }
+}
+
+namespace
+{
+  const std::unordered_map<std::wstring_view, handler_function_t> handlers_map = {
+    // ...other handlers...
+    {L"awesome_toast", awesome_toast_handler}
+  };}
+
+```
+
+Note: since _background activation_ implies that your toast handler will be invoked in a separate process, you can't share data directly from within a handler and your PT process. Also, since PT is currently a Desktop Bridge app, _foreground activation_ is [handled the same as background](https://docs.microsoft.com/en-US/windows/uwp/design/shell/tiles-and-notifications/send-local-toast-desktop-cpp-wrl#foreground-vs-background-activation), therefore we don't make a dedicated API for it. You can read more on the rationale of the current design [here](https://github.com/microsoft/PowerToys/pull/1178#issue-368768337).
+
+
--- a/installer/MSIX/PackagingLayout.xml
+++ b/installer/MSIX/PackagingLayout.xml
@ -16,6 +16,7 @@
        <File DestinationPath="modules\PowerRenameExt.dll" SourcePath="..\..\x64\Release\modules\PowerRenameExt.dll"/>
        <File DestinationPath="modules\shortcut_guide.dll" SourcePath="..\..\x64\Release\modules\shortcut_guide.dll"/>
        <File DestinationPath="modules\PowerRenameUWPUI.exe" SourcePath="..\..\x64\Release\PowerRenameUWPUI.exe"/>
+        <File DestinationPath="Notifications.dll" SourcePath="..\..\x64\Release\Notifications.dll"/>

        <File DestinationPath="svgs\*" SourcePath="..\..\x64\Release\svgs\*"/>
        <File DestinationPath="settings-html\**" SourcePath="..\..\x64\Release\settings-html\**"/>
--- a/installer/MSIX/appxmanifest.xml
+++ b/installer/MSIX/appxmanifest.xml
@ -48,7 +48,20 @@
            </desktop5:ItemType>
          </desktop4:FileExplorerContextMenus>
        </desktop4:Extension>
+        <Extension Category="windows.backgroundTasks" EntryPoint="PowerToysNotifications.BackgroundHandler">
+          <BackgroundTasks>
+            <Task Type="general" />
+          </BackgroundTasks>
+        </Extension>
      </Extensions>
    </Application>
  </Applications>
+  <Extensions>
+    <Extension Category="windows.activatableClass.inProcessServer">
+      <InProcessServer>
+        <Path>Notifications.dll</Path>
+        <ActivatableClass ActivatableClassId="PowerToysNotifications.BackgroundHandler" ThreadingModel="both"/>
+      </InProcessServer>
+    </Extension>
+  </Extensions>
 </Package>
--- a/src/common/common.vcxproj
+++ b/src/common/common.vcxproj
@ -99,6 +99,7 @@
    <ClInclude Include="d2d_text.h" />
    <ClInclude Include="d2d_window.h" />
    <ClInclude Include="dpi_aware.h" />
+    <ClInclude Include="notifications.h" />
    <ClInclude Include="window_helpers.h" />
    <ClInclude Include="icon_helpers.h" />
    <ClInclude Include="hwnd_data_cache.h" />
@ -127,6 +128,7 @@
    <ClCompile Include="hwnd_data_cache.cpp" />
    <ClCompile Include="json.cpp" />
    <ClCompile Include="monitors.cpp" />
+    <ClCompile Include="notifications.cpp" />
    <ClCompile Include="on_thread_executor.cpp" />
    <ClCompile Include="pch.cpp">
      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
--- a/src/common/common.vcxproj.filters
+++ b/src/common/common.vcxproj.filters
@ -87,6 +87,9 @@
    <ClInclude Include="window_helpers.h">
      <Filter>Header Files</Filter>
    </ClInclude>
+    <ClInclude Include="notifications.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
  </ItemGroup>
  <ItemGroup>
    <ClCompile Include="d2d_svg.cpp">
@ -144,5 +147,8 @@
    <ClCompile Include="window_helpers.cpp">
      <Filter>Source Files</Filter>
    </ClCompile>
+    <ClCompile Include="notifications.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
  </ItemGroup>
 </Project>
--- a/src/common/notifications.cpp
+++ b/src/common/notifications.cpp
@ -0,0 +1,89 @@
+#include "pch.h"
+#include "notifications.h"
+
+#include <unknwn.h>
+#include <winrt/base.h>
+#include <winrt/Windows.Foundation.h>
+#include <winrt/Windows.Data.Xml.Dom.h>
+#include <winrt/Windows.Foundation.Collections.h>
+#include <winrt/Windows.UI.Notifications.h>
+#include <winrt/Windows.ApplicationModel.Background.h>
+
+using namespace winrt::Windows::ApplicationModel::Background;
+using winrt::Windows::Data::Xml::Dom::XmlDocument;
+using winrt::Windows::UI::Notifications::ToastNotification;
+using winrt::Windows::UI::Notifications::ToastNotificationManager;
+
+namespace
+{
+    constexpr std::wstring_view TASK_NAME = L"PowerToysBackgroundNotificationsHandler";
+    constexpr std::wstring_view TASK_ENTRYPOINT = L"PowerToysNotifications.BackgroundHandler";
+    constexpr std::wstring_view APPLICATION_ID = L"PowerToys";
+}
+
+void notifications::register_background_toast_handler()
+{
+    try
+    {
+        // Re-request access to clean up from previous PowerToys installations
+        BackgroundExecutionManager::RemoveAccess();
+        BackgroundExecutionManager::RequestAccessAsync().get();
+
+        BackgroundTaskBuilder builder;
+        ToastNotificationActionTrigger trigger{ APPLICATION_ID };
+        builder.SetTrigger(trigger);
+        builder.TaskEntryPoint(TASK_ENTRYPOINT);
+        builder.Name(TASK_NAME);
+
+        const auto tasks = BackgroundTaskRegistration::AllTasks();
+        const bool already_registered = std::any_of(begin(tasks), end(tasks), [=](const auto& task) {
+            return task.Value().Name() == TASK_NAME;
+        });
+        if (already_registered)
+        {
+            return;
+        }
+        (void)builder.Register();
+    }
+    catch (...)
+    {
+        // Couldn't register the background task, nothing we can do
+    }
+}
+
+void notifications::show_toast(std::wstring_view message)
+{
+    // The toast won't be actually activated in the background, since it doesn't have any buttons
+    show_toast_background_activated(message, {}, {});
+}
+
+void notifications::show_toast_background_activated(std::wstring_view message, std::wstring_view background_handler_id, std::vector<std::wstring_view> button_labels)
+{
+    // DO NOT LOCALIZE any string in this function, because they're XML tags and a subject to
+    // https://docs.microsoft.com/en-us/windows/uwp/design/shell/tiles-and-notifications/toast-xml-schema
+
+    std::wstring toast_xml;
+    toast_xml.reserve(1024);
+    toast_xml += LR"(<?xml version="1.0"?><toast><visual><binding template="ToastGeneric"><text>PowerToys</text><text>)";
+    toast_xml += message;
+    toast_xml += L"</text></binding></visual><actions>";
+
+    for (size_t i = 0; i < size(button_labels); ++i)
+    {
+        toast_xml += LR"(<action activationType="background" arguments=")";
+        toast_xml += L"button_id=" + std::to_wstring(i); // pass the button ID
+        toast_xml += L"&amp;handler=";
+        toast_xml += background_handler_id;
+        toast_xml += LR"(" content=")";
+        toast_xml += button_labels[i];
+        toast_xml += LR"("/>)";
+    }
+    toast_xml += L"</actions></toast>";
+
+    XmlDocument toast_xml_doc;
+    toast_xml_doc.LoadXml(toast_xml);
+    ToastNotification notification{ toast_xml_doc };
+
+    const auto notifier = ToastNotificationManager::ToastNotificationManager::CreateToastNotifier();
+    notifier.Show(notification);
+}
--- a/src/common/notifications.h
+++ b/src/common/notifications.h
@ -0,0 +1,13 @@
+#pragma once
+
+#include <string_view>
+#include <vector>
+
+namespace notifications
+{
+    void register_background_toast_handler();
+
+    // Make sure your plaintext_message argument is properly XML-escaped
+    void show_toast(std::wstring_view plaintext_message);
+    void show_toast_background_activated(std::wstring_view plaintext_message, std::wstring_view background_handler_id, std::vector<std::wstring_view> plaintext_button_labels);
+}
--- a/src/common/notifications/cpp.hint
+++ b/src/common/notifications/cpp.hint
@ -0,0 +1,2 @@
+#define NOTIFICATIONSDLL_API __declspec(dllexport)
+#define NOTIFICATIONSDLL_API __declspec(dllimport)
--- a/src/common/notifications/dllmain.cpp
+++ b/src/common/notifications/dllmain.cpp
@ -0,0 +1,26 @@
+#include "pch.h"
+
+STDAPI DllRegisterServer()
+{
+    return S_OK;
+}
+
+STDAPI DllUnregisterServer()
+{
+    return S_OK;
+}
+
+BOOL APIENTRY DllMain(HMODULE,
+                      DWORD ul_reason_for_call,
+                      LPVOID)
+{
+    switch (ul_reason_for_call)
+    {
+    case DLL_PROCESS_ATTACH:
+    case DLL_THREAD_ATTACH:
+    case DLL_THREAD_DETACH:
+    case DLL_PROCESS_DETACH:
+        break;
+    }
+    return TRUE;
+}
--- a/src/common/notifications/framework.h
+++ b/src/common/notifications/framework.h
@ -0,0 +1,8 @@
+#pragma once
+
+#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
+#include <windows.h>
+
+#include <winrt/Windows.ApplicationModel.Background.h>
+#include <winrt/Windows.Foundation.h>
+#include <winrt/Windows.UI.Notifications.h>
--- a/src/common/notifications/notifications.def
+++ b/src/common/notifications/notifications.def
@ -0,0 +1,5 @@
+EXPORTS
+DllCanUnloadNow = WINRT_CanUnloadNow                    PRIVATE
+DllGetActivationFactory = WINRT_GetActivationFactory    PRIVATE
+DllRegisterServer                                       PRIVATE
+DllUnregisterServer                                     PRIVATE
--- a/src/common/notifications/notifications_dll.vcxproj
+++ b/src/common/notifications/notifications_dll.vcxproj
@ -0,0 +1,194 @@
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+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>16.0</VCProjectVersion>
+    <ProjectGuid>{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}</ProjectGuid>
+    <Keyword>Win32Proj</Keyword>
+    <RootNamespace>notificationsdll</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
+    <ConfigurationType>DynamicLibrary</ConfigurationType>
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+  <ImportGroup Label="ExtensionSettings">
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+  <ImportGroup Label="Shared">
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>Notifications</TargetName>
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
+    <TargetName>NOTIFICATIONSDLL</TargetName>
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+      <SDLCheck>true</SDLCheck>
+      <PreprocessorDefinitions>WIN32;NDEBUG;NOTIFICATIONSDLL_EXPORTS;_WINDOWS;_USRDLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <EnableUAC>false</EnableUAC>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <None Include="cpp.hint" />
+    <None Include="notifications.def" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="framework.h" />
+    <ClInclude Include="pch.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="dllmain.cpp" />
+    <ClCompile Include="pch.cpp">
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|x64'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">Create</PrecompiledHeader>
+      <PrecompiledHeader Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">Create</PrecompiledHeader>
+    </ClCompile>
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\notifications_winrt\notifications.vcxproj">
+      <Project>{031AC72E-FA28-4AB7-B690-6F7B9C28AA73}</Project>
+    </ProjectReference>
+  </ItemGroup>
+</Project>
--- a/src/common/notifications/notifications_dll.vcxproj.filters
+++ b/src/common/notifications/notifications_dll.vcxproj.filters
@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Header Files">
+      <UniqueIdentifier>{93995380-89BD-4b04-88EB-625FBE52EBFB}</UniqueIdentifier>
+      <Extensions>h;hh;hpp;hxx;hm;inl;inc;ipp;xsd</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="cpp.hint" />
+    <None Include="notifications.def">
+      <Filter>Resource Files</Filter>
+    </None>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="framework.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="pch.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="dllmain.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+    <ClCompile Include="pch.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+</Project>
--- a/src/common/notifications/pch.cpp
+++ b/src/common/notifications/pch.cpp
@ -0,0 +1,5 @@
+// pch.cpp: source file corresponding to the pre-compiled header
+
+#include "pch.h"
+
+// When you are using pre-compiled headers, this source file is necessary for compilation to succeed.
--- a/src/common/notifications/pch.h
+++ b/src/common/notifications/pch.h
@ -0,0 +1,8 @@
+#pragma once
+
+#ifndef PCH_H
+#define PCH_H
+
+#include "framework.h"
+
+#endif //PCH_H
--- a/src/common/notifications_winrt/BackgroundHandler.cpp
+++ b/src/common/notifications_winrt/BackgroundHandler.cpp
@ -0,0 +1,27 @@
+#include "pch.h"
+#include "BackgroundHandler.h"
+#include "BackgroundHandler.g.cpp"
+
+#include "handler_functions.h"
+
+namespace winrt::PowerToysNotifications::implementation
+{
+    using Windows::ApplicationModel::Background::IBackgroundTaskInstance;
+    using Windows::UI::Notifications::ToastNotificationActionTriggerDetail;
+    using Windows::Foundation::WwwFormUrlDecoder;
+
+    void BackgroundHandler::Run(IBackgroundTaskInstance bti)
+    {
+        const auto details = bti.TriggerDetails().try_as<ToastNotificationActionTriggerDetail>();
+        if (!details)
+        {
+            return;
+        }
+
+        WwwFormUrlDecoder decoder{details.Argument()};
+
+        const size_t button_id = std::stoi(decoder.GetFirstValueByName(L"button_id").c_str());
+        auto handler = decoder.GetFirstValueByName(L"handler");
+        dispatch_to_backround_handler(std::move(handler), std::move(bti), button_id);
+    }
+}
--- a/src/common/notifications_winrt/BackgroundHandler.h
+++ b/src/common/notifications_winrt/BackgroundHandler.h
@ -0,0 +1,20 @@
+#pragma once
+
+#include "BackgroundHandler.g.h"
+
+namespace winrt::PowerToysNotifications::implementation
+{
+    struct BackgroundHandler : BackgroundHandlerT<BackgroundHandler>
+    {
+        BackgroundHandler() = default;
+
+        void Run(winrt::Windows::ApplicationModel::Background::IBackgroundTaskInstance);
+    };
+}
+
+namespace winrt::PowerToysNotifications::factory_implementation
+{
+    struct BackgroundHandler : BackgroundHandlerT<BackgroundHandler, implementation::BackgroundHandler>
+    {
+    };
+}
--- a/src/common/notifications_winrt/BackgroundHandler.idl
+++ b/src/common/notifications_winrt/BackgroundHandler.idl
@ -0,0 +1,11 @@
+namespace PowerToysNotifications
+{
+    [version(1)]
+    [default_interface]
+    runtimeclass BackgroundHandler : Windows.ApplicationModel.Background.IBackgroundTask
+    {
+        BackgroundHandler();
+        
+        void Run(Windows.ApplicationModel.Background.IBackgroundTaskInstance taskInstance);
+    }
+}
--- a/src/common/notifications_winrt/PropertySheet.props
+++ b/src/common/notifications_winrt/PropertySheet.props
@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ImportGroup Label="PropertySheets" />
+  <PropertyGroup Label="UserMacros" />
+  <!--
+    To customize common C++/WinRT project properties: 
+    * right-click the project node
+    * expand the Common Properties item
+    * select the C++/WinRT property page
+
+    For more advanced scenarios, and complete documentation, please see:
+    https://github.com/Microsoft/cppwinrt/tree/master/nuget 
+    -->
+  <PropertyGroup />
+  <ItemDefinitionGroup />
+</Project>
--- a/src/common/notifications_winrt/handler_functions.cpp
+++ b/src/common/notifications_winrt/handler_functions.cpp
@ -0,0 +1,20 @@
+#include "pch.h"
+
+#include "handler_functions.h"
+
+using handler_function_t = void (*)(IBackgroundTaskInstance, const size_t button_id);
+
+namespace
+{
+    const std::unordered_map<std::wstring_view, handler_function_t> handlers_map;
+}
+
+void dispatch_to_backround_handler(std::wstring_view background_handler_id, IBackgroundTaskInstance bti, const size_t button_id)
+{
+    const auto found_handler = handlers_map.find(background_handler_id);
+    if (found_handler == end(handlers_map))
+    {
+        return;
+    }
+    found_handler->second(std::move(bti), button_id);
+}
--- a/src/common/notifications_winrt/handler_functions.h
+++ b/src/common/notifications_winrt/handler_functions.h
@ -0,0 +1,5 @@
+#pragma once
+
+using winrt::Windows::ApplicationModel::Background::IBackgroundTaskInstance;
+
+void dispatch_to_backround_handler(std::wstring_view background_handler_id, IBackgroundTaskInstance bti, const size_t button_id);
--- a/src/common/notifications_winrt/notifications.vcxproj
+++ b/src/common/notifications_winrt/notifications.vcxproj
@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.props" Condition="Exists('..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.props')" />
+  <PropertyGroup Label="Globals">
+    <CppWinRTOptimized>true</CppWinRTOptimized>
+    <CppWinRTRootNamespaceAutoMerge>true</CppWinRTRootNamespaceAutoMerge>
+    <CppWinRTGenerateWindowsMetadata>true</CppWinRTGenerateWindowsMetadata>
+    <MinimalCoreWin>true</MinimalCoreWin>
+    <ProjectGuid>{0b593a6c-4143-4337-860e-db5710fb87db}</ProjectGuid>
+    <ProjectName>notifications</ProjectName>
+    <RootNamespace>PowerToysNotifications</RootNamespace>
+    <DefaultLanguage>en-US</DefaultLanguage>
+    <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
+    <AppContainerApplication>true</AppContainerApplication>
+    <ApplicationType>Windows Store</ApplicationType>
+    <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
+    <WindowsTargetPlatformVersion Condition=" '$(WindowsTargetPlatformVersion)' == '' ">10.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformMinVersion>10.0.17134.0</WindowsTargetPlatformMinVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|ARM">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|Win32">
+      <Configuration>Debug</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM">
+      <Configuration>Release</Configuration>
+      <Platform>ARM</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|Win32">
+      <Configuration>Release</Configuration>
+      <Platform>Win32</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Configuration">
+    <ConfigurationType>StaticLibrary</ConfigurationType>
+    <PlatformToolset>v140</PlatformToolset>
+    <PlatformToolset Condition="'$(VisualStudioVersion)' == '15.0'">v141</PlatformToolset>
+    <PlatformToolset Condition="'$(VisualStudioVersion)' == '16.0'">v142</PlatformToolset>
+    <CharacterSet>Unicode</CharacterSet>
+    <GenerateManifest>false</GenerateManifest>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Debug'" Label="Configuration">
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <LinkIncremental>true</LinkIncremental>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)'=='Release'" Label="Configuration">
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <LinkIncremental>false</LinkIncremental>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="PropertySheet.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>notifications</TargetName>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>notifications</TargetName>
+  </PropertyGroup>
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PrecompiledHeader>Use</PrecompiledHeader>
+      <PrecompiledHeaderFile>pch.h</PrecompiledHeaderFile>
+      <PrecompiledHeaderOutputFile>$(IntDir)pch.pch</PrecompiledHeaderOutputFile>
+      <WarningLevel>Level4</WarningLevel>
+      <AdditionalOptions>%(AdditionalOptions) /bigobj</AdditionalOptions>
+      <!--Temporarily disable cppwinrt heap enforcement to work around xaml compiler generated std::shared_ptr use -->
+      <AdditionalOptions Condition="'$(CppWinRTHeapEnforcement)'==''">/DWINRT_NO_MAKE_DETECTION /await %(AdditionalOptions)</AdditionalOptions>
+      <DisableSpecificWarnings>
+      </DisableSpecificWarnings>
+      <PreprocessorDefinitions>_WINRT_DLL;WIN32_LEAN_AND_MEAN;WINRT_LEAN_AND_MEAN;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalUsingDirectories>$(WindowsSDK_WindowsMetadata);$(AdditionalUsingDirectories)</AdditionalUsingDirectories>
+    </ClCompile>
+    <Link>
+      <SubSystem>Console</SubSystem>
+      <GenerateWindowsMetadata>false</GenerateWindowsMetadata>
+      <ModuleDefinitionFile>notifications.def</ModuleDefinitionFile>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Debug'">
+    <ClCompile>
+      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</TreatWarningAsError>
+      <ConformanceMode Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">true</ConformanceMode>
+      <LanguageStandard Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">stdcpplatest</LanguageStandard>
+    </ClCompile>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)'=='Release'">
+    <ClCompile>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <TreatWarningAsError Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</TreatWarningAsError>
+      <ConformanceMode Condition="'$(Configuration)|$(Platform)'=='Release|x64'">true</ConformanceMode>
+      <LanguageStandard Condition="'$(Configuration)|$(Platform)'=='Release|x64'">stdcpplatest</LanguageStandard>
+    </ClCompile>
+    <Link>
+      <EnableCOMDATFolding>true</EnableCOMDATFolding>
+      <OptimizeReferences>true</OptimizeReferences>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClInclude Include="handler_functions.h" />
+    <ClInclude Include="pch.h" />
+    <ClInclude Include="BackgroundHandler.h">
+      <DependentUpon>BackgroundHandler.idl</DependentUpon>
+    </ClInclude>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="handler_functions.cpp" />
+    <ClCompile Include="pch.cpp">
+      <PrecompiledHeader>Create</PrecompiledHeader>
+    </ClCompile>
+    <ClCompile Include="BackgroundHandler.cpp">
+      <DependentUpon>BackgroundHandler.idl</DependentUpon>
+    </ClCompile>
+    <ClCompile Include="$(GeneratedFilesDir)module.g.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <Midl Include="BackgroundHandler.idl" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+    <None Include="PropertySheet.props" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+    <Import Project="..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.targets" Condition="Exists('..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.targets')" />
+  </ImportGroup>
+  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
+    <PropertyGroup>
+      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
+    </PropertyGroup>
+    <Error Condition="!Exists('..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.props')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.props'))" />
+    <Error Condition="!Exists('..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\..\..\packages\Microsoft.Windows.CppWinRT.2.0.200117.5\build\native\Microsoft.Windows.CppWinRT.targets'))" />
+  </Target>
+</Project>
--- a/src/common/notifications_winrt/notifications.vcxproj.filters
+++ b/src/common/notifications_winrt/notifications.vcxproj.filters
@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Resources">
+      <UniqueIdentifier>accd3aa8-1ba0-4223-9bbe-0c431709210b</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tga;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+    <Filter Include="Generated Files">
+      <UniqueIdentifier>{926ab91d-31b4-48c3-b9a4-e681349f27f0}</UniqueIdentifier>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="pch.cpp" />
+    <ClCompile Include="$(GeneratedFilesDir)module.g.cpp" />
+    <ClCompile Include="handler_functions.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="pch.h" />
+    <ClInclude Include="handler_functions.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="packages.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="PropertySheet.props" />
+  </ItemGroup>
+  <ItemGroup>
+    <Midl Include="BackgroundHandler.idl" />
+  </ItemGroup>
+</Project>
--- a/src/common/notifications_winrt/packages.config
+++ b/src/common/notifications_winrt/packages.config
@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="Microsoft.Windows.CppWinRT" version="2.0.200117.5" targetFramework="native" />
+</packages>
--- a/src/common/notifications_winrt/pch.cpp
+++ b/src/common/notifications_winrt/pch.cpp
@ -0,0 +1 @@
+#include "pch.h"
--- a/src/common/notifications_winrt/pch.h
+++ b/src/common/notifications_winrt/pch.h
@ -0,0 +1,7 @@
+#pragma once
+#include <unknwn.h>
+#include "winrt/Windows.ApplicationModel.Background.h"
+#include <winrt/Windows.Data.Xml.Dom.h>
+#include <winrt/Windows.Foundation.h>
+#include <winrt/Windows.Foundation.Collections.h>
+#include <winrt/Windows.UI.Notifications.h>
--- a/src/runner/main.cpp
+++ b/src/runner/main.cpp
@ -13,6 +13,9 @@
 #include <common/common.h>
 #include <common/dpi_aware.h>

+#include <common/winstore.h>
+#include <common/notifications.h>
+
 #if _DEBUG && _WIN64
 #include "unhandled_exception_handler.h"
 #endif
@ -43,6 +46,10 @@ int runner()
    Trace::RegisterProvider();
    winrt::init_apartment();
    start_tray_icon();
+    if (winstore::running_as_packaged())
+    {
+        notifications::register_background_toast_handler();
+    }
    int result;
    try
    {