Create Double Tap Power Gesture For Camera Preference Controller

Create Preference controller to select camera launch as a target action
for the Double Tap Power Button gesture.

Android Settings Feature Request: b/380287172

Bug: 379309894
Test: atest DoubleTapPowerForCameraLaunchPreferenceControllerTest
FLAG: android.service.quickaccesswallet.launch_wallet_option_on_power_double_tap
Change-Id: I3b6b90177293066b04f9f4eb0139f8ac3b3812b0

src/com/android/settings/gestures/DoubleTapPowerForCameraPreferenceController.java

@@ -0,0 +1,114 @@
+/*
+ * 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.settings.gestures;
+
+import android.content.Context;
+import android.database.ContentObserver;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.Looper;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+import com.android.settingslib.widget.SelectorWithWidgetPreference;
+
+public class DoubleTapPowerForCameraPreferenceController extends BasePreferenceController
+        implements LifecycleObserver, OnStart, OnStop {
+
+    @Nullable private Preference mPreference;
+    private final ContentObserver mSettingsObserver =
+            new ContentObserver(new Handler(Looper.getMainLooper())) {
+                @Override
+                public void onChange(boolean selfChange, @Nullable Uri uri) {
+                    if (mPreference == null || uri == null) {
+                        return;
+                    }
+                    if (uri.equals(
+                            DoubleTapPowerSettingsUtils
+                                    .DOUBLE_TAP_POWER_BUTTON_GESTURE_ENABLED_URI)) {
+                        mPreference.setEnabled(
+                                DoubleTapPowerSettingsUtils.isDoubleTapPowerButtonGestureEnabled(
+                                        mContext));
+                    } else if (uri.equals(
+                            DoubleTapPowerSettingsUtils
+                                    .DOUBLE_TAP_POWER_BUTTON_GESTURE_TARGET_ACTION_URI)) {
+                        updateState(mPreference);
+                    }
+                }
+            };
+
+    public DoubleTapPowerForCameraPreferenceController(
+            @NonNull Context context, @NonNull String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (!DoubleTapPowerSettingsUtils.isDoubleTapPowerButtonGestureAvailable(mContext)) {
+            return UNSUPPORTED_ON_DEVICE;
+        }
+        return DoubleTapPowerSettingsUtils.isDoubleTapPowerButtonGestureEnabled(mContext)
+                ? AVAILABLE
+                : DISABLED_DEPENDENT_SETTING;
+    }
+
+    @Override
+    public void displayPreference(@NonNull PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void updateState(@NonNull Preference preference) {
+        super.updateState(preference);
+        if (preference instanceof SelectorWithWidgetPreference) {
+            ((SelectorWithWidgetPreference) preference)
+                    .setChecked(
+                            DoubleTapPowerSettingsUtils
+                                    .isDoubleTapPowerButtonGestureForCameraLaunchEnabled(mContext));
+        }
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(@NonNull Preference preference) {
+        if (!getPreferenceKey().equals(preference.getKey())) {
+            return false;
+        }
+        DoubleTapPowerSettingsUtils.setDoubleTapPowerButtonForCameraLaunch(mContext);
+        if (preference instanceof SelectorWithWidgetPreference) {
+            ((SelectorWithWidgetPreference) preference).setChecked(true);
+        }
+        return true;
+    }
+
+    @Override
+    public void onStart() {
+        DoubleTapPowerSettingsUtils.registerObserver(mContext, mSettingsObserver);
+    }
+
+    @Override
+    public void onStop() {
+        DoubleTapPowerSettingsUtils.unregisterObserver(mContext, mSettingsObserver);
+    }
+}