Merge "Add Smooth Display option to developer in Settings" into rvc-dev

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -459,6 +459,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new SelectDebugAppPreferenceController(context, fragment));
         controllers.add(new WaitForDebuggerPreferenceController(context));
         controllers.add(new EnableGpuDebugLayersPreferenceController(context));
+        controllers.add(new ForcePeakRefreshRatePreferenceController(context));
         controllers.add(new EnableVerboseVendorLoggingPreferenceController(context));
         controllers.add(new VerifyAppsOverUsbPreferenceController(context));
         controllers.add(new ArtVerifierPreferenceController(context));

src/com/android/settings/development/ForcePeakRefreshRatePreferenceController.java

@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2020 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.development;
+
+import android.content.Context;
+import android.hardware.display.DisplayManager;
+import android.provider.Settings;
+import android.util.Log;
+import android.view.Display;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.R;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class ForcePeakRefreshRatePreferenceController extends DeveloperOptionsPreferenceController
+        implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
+
+    @VisibleForTesting
+    static float DEFAULT_REFRESH_RATE = 60f;
+
+    @VisibleForTesting
+    static float NO_CONFIG = 0f;
+
+    @VisibleForTesting
+    float mPeakRefreshRate;
+
+    private static final String TAG = "ForcePeakRefreshRateCtr";
+    private static final String PREFERENCE_KEY = "pref_key_peak_refresh_rate";
+
+    public ForcePeakRefreshRatePreferenceController(Context context) {
+        super(context);
+
+        final DisplayManager dm = context.getSystemService(DisplayManager.class);
+        final Display display = dm.getDisplay(Display.DEFAULT_DISPLAY);
+
+        if (display == null) {
+            Log.w(TAG, "No valid default display device");
+            mPeakRefreshRate = DEFAULT_REFRESH_RATE;
+        } else {
+            mPeakRefreshRate = findPeakRefreshRate(display.getSupportedModes());
+        }
+
+        Log.d(TAG, "DEFAULT_REFRESH_RATE : " + DEFAULT_REFRESH_RATE
+            + " mPeakRefreshRate : " + mPeakRefreshRate);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREFERENCE_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        final boolean isEnabled = (Boolean) newValue;
+        forcePeakRefreshRate(isEnabled);
+
+        return true;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        ((SwitchPreference) mPreference).setChecked(isForcePeakRefreshRateEnabled());
+    }
+
+    @Override
+    public boolean isAvailable() {
+        if (mContext.getResources().getBoolean(R.bool.config_show_smooth_display)) {
+            return mPeakRefreshRate > DEFAULT_REFRESH_RATE;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    protected void onDeveloperOptionsSwitchDisabled() {
+        super.onDeveloperOptionsSwitchDisabled();
+        Settings.System.putFloat(mContext.getContentResolver(),
+            Settings.System.MIN_REFRESH_RATE, NO_CONFIG);
+
+        ((SwitchPreference) mPreference).setChecked(false);
+    }
+
+    @VisibleForTesting
+    void forcePeakRefreshRate(boolean enable) {
+        final float peakRefreshRate = enable ? mPeakRefreshRate : NO_CONFIG;
+        Settings.System.putFloat(mContext.getContentResolver(),
+            Settings.System.MIN_REFRESH_RATE, peakRefreshRate);
+    }
+
+    boolean isForcePeakRefreshRateEnabled() {
+        final float peakRefreshRate = Settings.System.getFloat(mContext.getContentResolver(),
+            Settings.System.MIN_REFRESH_RATE, NO_CONFIG);
+
+        return peakRefreshRate >= mPeakRefreshRate;
+    }
+
+    private float findPeakRefreshRate(Display.Mode[] modes) {
+        float peakRefreshRate = DEFAULT_REFRESH_RATE;
+        for (Display.Mode mode : modes) {
+            if (Math.round(mode.getRefreshRate()) > DEFAULT_REFRESH_RATE) {
+                peakRefreshRate = mode.getRefreshRate();
+            }
+        }
+
+        return peakRefreshRate;
+    }
+}