Add sensitivity configuration to long press power dialog

This gives the user the ability to configure the length of the long press power gesture. The configuration values are read from config.xml and can be customized per device.

Bug: 193792060
Test: Manual test on Pixel 6 and Pixel 4 hardware devices
Test: Unit tests with make -j64 RunSettingsRoboTests ROBOTEST_FILTER="com.android.settings.gestures.*"
Change-Id: Ia6595c1337244b01e9c8b2ef04dd97a9a0f03de2

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

@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2021 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.os.Handler;
+import android.provider.Settings;
+
+import androidx.annotation.Nullable;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.SliderPreferenceController;
+import com.android.settings.widget.LabeledSeekBarPreference;
+import com.android.settingslib.core.lifecycle.LifecycleObserver;
+import com.android.settingslib.core.lifecycle.events.OnStart;
+import com.android.settingslib.core.lifecycle.events.OnStop;
+
+/** Handles changes to the long press power button sensitivity slider. */
+public class LongPressPowerSensitivityPreferenceController extends
+        SliderPreferenceController implements
+        LifecycleObserver, OnStart, OnStop {
+
+    private final ContentObserver mPowerButtonObserver = new ContentObserver(Handler.getMain()) {
+        @Override
+        public void onChange(boolean selfChange) {
+            if (mPreference != null) {
+                updateState(mPreference);
+            }
+        }
+    };
+
+    @Nullable
+    private final int[] mSensitivityValues;
+
+    @Nullable
+    private LabeledSeekBarPreference mPreference;
+
+    public LongPressPowerSensitivityPreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+        mSensitivityValues = context.getResources().getIntArray(
+                com.android.internal.R.array.config_longPressOnPowerDurationSettings);
+    }
+
+    @Override
+    public void onStart() {
+        mContext.getContentResolver().registerContentObserver(
+                Settings.Global.getUriFor(PowerMenuSettingsUtils.POWER_BUTTON_LONG_PRESS_SETTING),
+                false, mPowerButtonObserver);
+    }
+
+    @Override
+    public void onStop() {
+        mContext.getContentResolver().unregisterContentObserver(mPowerButtonObserver);
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+        if (mPreference != null) {
+            mPreference.setContinuousUpdates(false);
+            mPreference.setHapticFeedbackMode(
+                    LabeledSeekBarPreference.HAPTIC_FEEDBACK_MODE_ON_TICKS);
+            mPreference.setMin(getMin());
+            mPreference.setMax(getMax());
+        }
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        super.updateState(preference);
+        final LabeledSeekBarPreference pref = (LabeledSeekBarPreference) preference;
+        pref.setEnabled(
+                isAvailable() && PowerMenuSettingsUtils.isLongPressPowerForAssistEnabled(mContext));
+        pref.setProgress(getSliderPosition());
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (mSensitivityValues == null || mSensitivityValues.length < 2) {
+            return UNSUPPORTED_ON_DEVICE;
+        }
+
+        if (!PowerMenuSettingsUtils.isLongPressPowerForAssistEnabled(mContext)) {
+            return DISABLED_DEPENDENT_SETTING;
+        }
+
+        return AVAILABLE;
+    }
+
+    @Override
+    public int getSliderPosition() {
+        return mSensitivityValues == null ? 0 : closestValueIndex(mSensitivityValues,
+                getCurrentSensitivityValue());
+    }
+
+    @Override
+    public boolean setSliderPosition(int position) {
+        if (mSensitivityValues == null || position < 0 || position >= mSensitivityValues.length) {
+            return false;
+        }
+        return Settings.Global.putInt(mContext.getContentResolver(),
+                Settings.Global.POWER_BUTTON_LONG_PRESS_DURATION_MS,
+                mSensitivityValues[position]);
+    }
+
+    @Override
+    public int getMax() {
+        if (mSensitivityValues == null || mSensitivityValues.length == 0) {
+            return 0;
+        }
+        return mSensitivityValues.length - 1;
+    }
+
+    @Override
+    public int getMin() {
+        return 0;
+    }
+
+    private int getCurrentSensitivityValue() {
+        return Settings.Global.getInt(mContext.getContentResolver(),
+                Settings.Global.POWER_BUTTON_LONG_PRESS_DURATION_MS,
+                mContext.getResources().getInteger(
+                        com.android.internal.R.integer.config_longPressOnPowerDurationMs));
+    }
+
+    private static int closestValueIndex(int[] values, int needle) {
+        int minDistance = Integer.MAX_VALUE;
+        int valueIndex = 0;
+        for (int i = 0; i < values.length; i++) {
+            int diff = Math.abs(values[i] - needle);
+            if (diff < minDistance) {
+                minDistance = diff;
+                valueIndex = i;
+            }
+        }
+        return valueIndex;
+    }
+}