Add settings for home button gesture

app/ui/src/main/java/de/mm20/launcher2/ui/settings/gestures/GestureSettingsScreen.kt

@@ -195,6 +195,29 @@ fun GestureSettingsScreen() {
                     appIcon = swipeRightAppIcon,
                     onAppChanged = { viewModel.setSwipeRightApp(it) }
                 )
+
+                val homeButton by viewModel.homeButton.collectAsStateWithLifecycle(null)
+                AnimatedVisibility(hasPermission == false && requiresAccessibilityService(homeButton)) {
+                    MissingPermissionBanner(
+                        modifier = Modifier.padding(16.dp),
+                        text = stringResource(R.string.missing_permission_accessibility_gesture_settings),
+                        onClick = { viewModel.requestPermission(context as AppCompatActivity) }
+                    )
+                }
+                val homeButtonApp by viewModel.homeButtonApp.collectAsState(null)
+                val homeButtonAppIcon by remember(homeButtonApp?.key) {
+                    viewModel.getIcon(homeButtonApp, appIconSize.toInt())
+                }.collectAsState(null)
+                GesturePreference(
+                    title = stringResource(R.string.preference_gesture_home_button),
+                    value = homeButton,
+                    onValueChanged = { viewModel.setHomeButton(it) },
+                    isOpenSearch = false,
+                    options = options,
+                    app = homeButtonApp,
+                    appIcon = homeButtonAppIcon,
+                    onAppChanged = { viewModel.setHomeButtonApp(it) }
+                )
             }
         }
     }

app/ui/src/main/java/de/mm20/launcher2/ui/settings/gestures/GestureSettingsScreenVM.kt

@@ -53,6 +53,8 @@ class GestureSettingsScreenVM : ViewModel(), KoinComponent {
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), null)
     val longPress = dataStore.data.map { it.gestures.longPress }
         .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), null)
+    val homeButton = dataStore.data.map { it.gestures.homeButton }
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), null)
 
     fun setSwipeDown(action: GestureAction) {
         viewModelScope.launch {
@@ -99,6 +101,15 @@ class GestureSettingsScreenVM : ViewModel(), KoinComponent {
         }
     }
 
+    fun setHomeButton(action: GestureAction) {
+        viewModelScope.launch {
+            dataStore.updateData {
+                it.toBuilder().setGestures(it.gestures.toBuilder().setHomeButton(action).build())
+                    .build()
+            }
+        }
+    }
+
     val swipeLeftApp: Flow<SavableSearchable?> = dataStore.data.map { it.gestures.swipeLeftApp }
         .map {
             if (it.isEmpty()) null else searchableRepository.getByKeys(listOf(it)).firstOrNull()
@@ -199,6 +210,26 @@ class GestureSettingsScreenVM : ViewModel(), KoinComponent {
         }
     }
 
+    val homeButtonApp: Flow<SavableSearchable?> = dataStore.data.map { it.gestures.homeButtonApp }
+        .map {
+            if (it.isEmpty()) null else searchableRepository.getByKeys(listOf(it)).firstOrNull()
+        }
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(stopTimeoutMillis = 10000), null)
+
+    fun setHomeButtonApp(searchable: SavableSearchable?) {
+        viewModelScope.launch {
+            searchable?.let { searchableRepository.insert(it) }
+            dataStore.updateData {
+                it.toBuilder()
+                    .setGestures(it.gestures.toBuilder()
+                        .setHomeButtonApp(searchable?.key ?: "")
+                        .build()
+                    )
+                    .build()
+            }
+        }
+    }
+
 
 
     fun requestPermission(context: AppCompatActivity) {

core/i18n/src/main/res/values/strings.xml

@@ -775,6 +775,7 @@
     <string name="preference_gesture_swipe_right">Swipe right</string>
     <string name="preference_gesture_double_tap">Double tap</string>
     <string name="preference_gesture_long_press">Long press</string>
+    <string name="preference_gesture_home_button">Home button/gesture</string>
     <string name="gesture_action_none">None</string>
     <string name="gesture_action_open_search">Open search</string>
     <string name="gesture_action_launch_app">Launch app</string>

core/preferences/src/main/proto/settings.proto

@@ -329,6 +329,8 @@ message Settings {
     string swipe_right_app = 8;
     string double_tap_app = 9;
     string long_press_app = 10;
+    GestureAction home_button = 11;
+    string home_button_app = 12;
   }
   GestureSettings gestures = 28;