Minimal local toast example

using JNI

Author: infeo

integrations-win.vcxproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup Label="ProjectConfigurations">
     <ProjectConfiguration Include="Debug|Win32">
@@ -117,6 +117,7 @@
     <ClInclude Include="src\main\headers\org_cryptomator_windows_autostart_WinShellLinks_Native.h" />
     <ClInclude Include="src\main\headers\org_cryptomator_windows_keychain_WinDataProtection_Native.h" />
     <ClInclude Include="src\main\headers\org_cryptomator_windows_keychain_WindowsHello_Native.h" />
+    <ClInclude Include="src\main\headers\org_cryptomator_windows_notify_WinToasts_Native.h" />
     <ClInclude Include="src\main\headers\org_cryptomator_windows_uiappearance_WinAppearance_Native.h" />
     <ClInclude Include="src\main\resources\ktmw32_helper.h" />
   </ItemGroup>
@@ -125,6 +126,10 @@
     <ClCompile Include="src\main\native\org_cryptomator_windows_keychain_WinDataProtection_Native.cpp" />
     <ClCompile Include="src\main\native\org_cryptomator_windows_keychain_WindowsHello_Native.cpp" />
     <ClCompile Include="src\main\native\org_cryptomator_windows_uiappearance_WinAppearance_Native.cpp" />
+    <ClCompile Include="src\main\native\org_cryptomator_windows_notify_WinToasts_Native.cpp" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Makefile" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">

src/main/headers/org_cryptomator_windows_notify_WinToasts_Native.h

@@ -0,0 +1,32 @@
+package org.cryptomator.windows.notify;
+
+import org.cryptomator.windows.common.NativeLibLoader;
+import org.cryptomator.windows.common.WinStrings;
+
+class WinToasts {
+
+
+	/**
+	 * Sends an app notification to Windows.
+	 *
+	 * @param appUserModelId Application User Model ID associated with the notification
+	 * @param toastXml       xml string describing the toast message
+	 * @return {@code 0} if everything worked, otherwise an HRESULT error code
+	 */
+	public int sendToastNotification(String appUserModelId, String toastXml) {
+		return Native.INSTANCE.sendToastNotification(
+				WinStrings.getNullTerminatedUTF16Representation(appUserModelId),
+				WinStrings.getNullTerminatedUTF16Representation(toastXml));
+	}
+
+	private static class Native {
+		static final Native INSTANCE = new Native();
+
+		private Native() {
+			NativeLibLoader.loadLib();
+		}
+
+		native int sendToastNotification(byte[] AppUserModelId, byte[] storagePath);
+
+	}
+}

src/main/java/org/cryptomator/windows/notify/WinToasts.java

@@ -0,0 +1,28 @@
+package org.cryptomator.windows.notify;
+
+public class WindowsNotifications {
+
+	private static final String WINDOWS_NOTIFIATION_AUMID_PROPERTY = "cryptomator.integrationsWin.aumid";
+	private static final String XML_TEMPLATE = """
+			<toast>
+			  <visual>
+			    <binding template='ToastGeneric'>
+			      <text>Cryptomator says Hello</text>
+			    </binding>
+			  </visual>
+			  <actions>
+			    <action content='Call back Cryptomator' arguments='the_args' activationKind='Foreground' />
+			  </actions>
+			</toast>""";
+
+	private final WinToasts proxy;
+
+	public WindowsNotifications() {
+		proxy = new WinToasts();
+	}
+
+	public void sendNotification() {
+		var aumid = System.getProperty(WINDOWS_NOTIFIATION_AUMID_PROPERTY, "Cryptomator.Cryptomator");
+		proxy.sendToastNotification(aumid,XML_TEMPLATE);
+	}
+}

src/main/java/org/cryptomator/windows/notify/WindowsNotifications.java

@@ -0,0 +1,35 @@
+#include <iostream>
+#include <windows.h>
+#include <string_view>
+#include <winrt/Windows.UI.Notifications.h>
+#include <winrt/Windows.Data.Xml.Dom.h>
+#include "org_cryptomator_windows_notify_WinToasts_Native.h"
+
+using namespace winrt;
+using namespace Windows::Data::Xml::Dom;
+using namespace Windows::UI::Notifications;
+
+JNIEXPORT jint JNICALL Java_org_cryptomator_windows_notify_WinToasts_00024Native_sendToastNotification
+        (JNIEnv* env, jobject obj, jbyteArray jAumid, jbyteArray jToastXml) {
+    LPCWSTR aumid = (LPCWSTR)env->GetByteArrayElements(jAumid, NULL);
+    LPCWSTR toastXmlString = (LPCWSTR)env->GetByteArrayElements(jToastXml, NULL);
+    HRESULT result = 0;
+    winrt::init_apartment();
+        try {
+            std::wstring wAUMID{ aumid };
+            std::wstring wToastXmlString{ toastXmlString };
+            XmlDocument toastXml;
+            toastXml.LoadXml(wToastXmlString);
+            ToastNotification toast{ toastXml };
+            toast.ExpiresOnReboot(true);
+            ToastNotifier notifier{ ToastNotificationManager::CreateToastNotifier(wAUMID) };
+            notifier.Show(toast);
+        }
+        catch (winrt::hresult_error const& e) {
+            std::wcout << std::wstring_view( e.message()) << std::endl;
+            result = e.code();
+        }
+        env->ReleaseByteArrayElements(jAumid, (jbyte*) aumid, JNI_ABORT);
+        env->ReleaseByteArrayElements(jToastXml, (jbyte*) toastXmlString, JNI_ABORT);
+        return result;
+}

src/main/native/org_cryptomator_windows_notify_WinToasts_Native.cpp

@@ -0,0 +1,13 @@
+package org.cryptomator.windows.notify;
+
+import org.junit.jupiter.api.Test;
+
+public class WinToastsTest {
+
+	@Test
+	public void sendToast() {
+		var toaster = new WindowsNotifications();
+
+		toaster.sendNotification();
+	}
+}