Setup Dagger for Launcher (1/n)

Bug: 361850561
Test: Manual
Flag: NONE Dagger Integration
Change-Id: Idbe19f1aa747f519417e21fe8a23a41c52ececc1

5 files changed, 126 insertions, 8 deletions

diff --git a/Android.bp b/Android.bp
index def024efee..b205d0c35c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -27,7 +27,7 @@ java_defaults {
         "android.os.flags-aconfig-java",
         "android.appwidget.flags-aconfig-java",
         "com.android.window.flags.window-aconfig-java",
-    ]
+    ],
 }
 
 // Common source files used to build launcher (java and kotlin)
@@ -153,7 +153,7 @@ launcher_compose_java_defaults {
     soong_config_variables: {
         release_enable_compose_in_launcher: {
             srcs: [
-                ":launcher-compose-enabled-src"
+                ":launcher-compose-enabled-src",
             ],
 
             // Compose dependencies
@@ -166,7 +166,7 @@ launcher_compose_java_defaults {
             // in compose/launcher3/facade/disabled/.
             conditions_default: {
                 srcs: [
-                    ":launcher-compose-disabled-src"
+                    ":launcher-compose-disabled-src",
                 ],
                 static_libs: [],
             },
@@ -179,7 +179,7 @@ quickstep_compose_java_defaults {
     soong_config_variables: {
         release_enable_compose_in_launcher: {
             srcs: [
-                ":launcher-quickstep-compose-enabled-src"
+                ":launcher-quickstep-compose-enabled-src",
             ],
 
             // Compose dependencies
@@ -192,7 +192,7 @@ quickstep_compose_java_defaults {
             // in compose/quickstep/facade/disabled/.
             conditions_default: {
                 srcs: [
-                    ":launcher-quickstep-compose-disabled-src"
+                    ":launcher-quickstep-compose-disabled-src",
                 ],
                 static_libs: [],
             },
@@ -322,6 +322,8 @@ android_library {
         "kotlinx_coroutines",
         "com_android_launcher3_flags_lib",
         "com_android_wm_shell_flags_lib",
+        "dagger2",
+        "jsr330",
 
     ],
     manifest: "AndroidManifest-common.xml",
@@ -357,6 +359,7 @@ android_app {
     sdk_version: "current",
     min_sdk_version: min_launcher3_sdk_version,
     target_sdk_version: "current",
+    plugins: ["dagger2-compiler"],
     privileged: true,
     system_ext_specific: true,
 
@@ -392,6 +395,7 @@ android_library {
         "lottie",
         "SystemUISharedLib",
         "SettingsLibSettingsTheme",
+        "dagger2",
     ],
     manifest: "quickstep/AndroidManifest.xml",
     min_sdk_version: "current",
@@ -421,7 +425,10 @@ android_library {
         "QuickstepResLib",
         "androidx.room_room-runtime",
     ],
-    plugins: ["androidx.room_room-compiler-plugin"],
+    plugins: [
+        "androidx.room_room-compiler-plugin",
+        "dagger2-compiler",
+    ],
     manifest: "quickstep/AndroidManifest.xml",
     additional_manifests: [
         "go/AndroidManifest.xml",
@@ -437,7 +444,7 @@ android_library {
     name: "Launcher3QuickStepLib",
     defaults: [
         "launcher_compose_defaults",
-        "quickstep_compose_defaults"
+        "quickstep_compose_defaults",
     ],
     srcs: [
         ":launcher-src",
@@ -458,6 +465,7 @@ android_library {
     ],
     manifest: "quickstep/AndroidManifest.xml",
     platform_apis: true,
+    plugins: ["dagger2-compiler"],
     min_sdk_version: "current",
     // TODO(b/319712088): re-enable use_resource_processor
     use_resource_processor: false,
@@ -500,7 +508,6 @@ android_app {
 
 }
 
-
 // Build rule for Launcher3 Go app with quickstep for Android Go devices.
 // Note that the following two rules are exactly same, and should
 // eventually be merged into a single target
@@ -540,6 +547,7 @@ android_app {
         include_filter: ["com.android.launcher3.*"],
     },
 }
+
 android_app {
     name: "Launcher3QuickStepGo",
     static_libs: ["Launcher3GoLib"],
diff --git a/quickstep/src/com/android/launcher3/dagger/LauncherAppComponent.java b/quickstep/src/com/android/launcher3/dagger/LauncherAppComponent.java
new file mode 100644
index 0000000000..dab25820ce
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/dagger/LauncherAppComponent.java
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.dagger;
+
+import dagger.Component;
+
+import javax.inject.Singleton;
+
+/**
+ * Root component for Dagger injection for Launcher Quickstep.
+ */
+@Singleton
+@Component
+public interface LauncherAppComponent extends LauncherBaseAppComponent {
+    /** Builder for quickstep LauncherAppComponent. */
+    @Component.Builder
+    interface Builder extends LauncherBaseAppComponent.Builder {
+        LauncherAppComponent build();
+    }
+}
diff --git a/src/com/android/launcher3/LauncherApplication.java b/src/com/android/launcher3/LauncherApplication.java
index 40873be369..8969b60534 100644
--- a/src/com/android/launcher3/LauncherApplication.java
+++ b/src/com/android/launcher3/LauncherApplication.java
@@ -17,14 +17,23 @@ package com.android.launcher3;
 
 import android.app.Application;
 
+import com.android.launcher3.dagger.DaggerLauncherAppComponent;
+import com.android.launcher3.dagger.LauncherBaseAppComponent;
+
 /**
  * Main application class for Launcher
  */
 public class LauncherApplication extends Application {
 
+    private LauncherBaseAppComponent mAppComponent;
     @Override
     public void onCreate() {
         super.onCreate();
         MainProcessInitializer.initialize(this);
+        mAppComponent = DaggerLauncherAppComponent.builder().build();
+    }
+
+    public LauncherBaseAppComponent getAppComponent() {
+        return mAppComponent;
     }
 }
diff --git a/src/com/android/launcher3/dagger/LauncherBaseAppComponent.java b/src/com/android/launcher3/dagger/LauncherBaseAppComponent.java
new file mode 100644
index 0000000000..3488c95333
--- /dev/null
+++ b/src/com/android/launcher3/dagger/LauncherBaseAppComponent.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.dagger;
+
+/**
+ * Launcher base component for Dagger injection.
+ *
+ * This class is not actually annotated as a Dagger component, since it is not used directly as one.
+ * Doing so generates unnecessary code bloat.
+ *
+ * See {@link LauncherAppComponent} for the one actually used by AOSP.
+ */
+public interface LauncherBaseAppComponent {
+    /** Builder for LauncherBaseAppComponent. */
+    interface Builder {
+        LauncherBaseAppComponent build();
+    }
+}
diff --git a/src_no_quickstep/com/android/launcher3/dagger/LauncherAppComponent.java b/src_no_quickstep/com/android/launcher3/dagger/LauncherAppComponent.java
new file mode 100644
index 0000000000..4d7f93701e
--- /dev/null
+++ b/src_no_quickstep/com/android/launcher3/dagger/LauncherAppComponent.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.dagger;
+
+import dagger.Component;
+
+import javax.inject.Singleton;
+
+/**
+ * Root component for Dagger injection for Launcher AOSP.
+ */
+@Singleton
+@Component
+public interface LauncherAppComponent extends LauncherBaseAppComponent {
+    /** Builder for aosp LauncherAppComponent. */
+    @Component.Builder
+    interface Builder extends LauncherBaseAppComponent.Builder {
+        LauncherAppComponent build();
+    }
+}
+