Ady Abraham | 678e187 | 2019-11-20 11:13:30 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2019 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package com.android.settings.development; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.os.IBinder; |
| 21 | import android.os.Parcel; |
| 22 | import android.os.RemoteException; |
| 23 | import android.os.ServiceManager; |
| 24 | |
| 25 | import androidx.annotation.VisibleForTesting; |
| 26 | import androidx.preference.Preference; |
| 27 | import androidx.preference.SwitchPreference; |
| 28 | |
| 29 | import com.android.settings.core.PreferenceControllerMixin; |
| 30 | import com.android.settingslib.development.DeveloperOptionsPreferenceController; |
| 31 | |
| 32 | /** |
| 33 | * Controller class for controlling the refresh rate overlay on SurfaceFlinger |
| 34 | */ |
| 35 | public class ShowRefreshRatePreferenceController extends DeveloperOptionsPreferenceController |
| 36 | implements Preference.OnPreferenceChangeListener, PreferenceControllerMixin { |
| 37 | |
| 38 | private static final String SHOW_REFRESH_RATE_KEY = "show_refresh_rate"; |
| 39 | |
| 40 | private static final int SETTING_VALUE_QUERY = 2; |
| 41 | private static final int SETTING_VALUE_ON = 1; |
| 42 | private static final int SETTING_VALUE_OFF = 0; |
| 43 | |
| 44 | @VisibleForTesting |
| 45 | static final String SURFACE_FLINGER_SERVICE_KEY = "SurfaceFlinger"; |
| 46 | @VisibleForTesting |
| 47 | static final int SURFACE_FLINGER_CODE = 1034; |
| 48 | |
| 49 | private static final String SURFACE_COMPOSER_INTERFACE_KEY = "android.ui.ISurfaceComposer"; |
| 50 | |
| 51 | private final IBinder mSurfaceFlinger; |
| 52 | |
| 53 | public ShowRefreshRatePreferenceController(Context context) { |
| 54 | super(context); |
| 55 | mSurfaceFlinger = ServiceManager.getService(SURFACE_FLINGER_SERVICE_KEY); |
| 56 | } |
| 57 | |
| 58 | @Override |
| 59 | public String getPreferenceKey() { |
| 60 | return SHOW_REFRESH_RATE_KEY; |
| 61 | } |
| 62 | |
| 63 | @Override |
| 64 | public boolean onPreferenceChange(Preference preference, Object newValue) { |
| 65 | final boolean isEnabled = (Boolean) newValue; |
| 66 | writeShowRefreshRateSetting(isEnabled); |
| 67 | return true; |
| 68 | } |
| 69 | |
| 70 | @Override |
| 71 | public void updateState(Preference preference) { |
| 72 | updateShowRefreshRateSetting(); |
| 73 | } |
| 74 | |
| 75 | @Override |
| 76 | protected void onDeveloperOptionsSwitchDisabled() { |
| 77 | super.onDeveloperOptionsSwitchDisabled(); |
| 78 | final SwitchPreference preference = (SwitchPreference) mPreference; |
| 79 | if (preference.isChecked()) { |
| 80 | // Writing false to the preference when the setting is already off will have a |
| 81 | // side effect of turning on the preference that we wish to avoid |
| 82 | writeShowRefreshRateSetting(false); |
| 83 | preference.setChecked(false); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | @VisibleForTesting |
| 88 | void updateShowRefreshRateSetting() { |
| 89 | // magic communication with surface flinger. |
| 90 | try { |
| 91 | if (mSurfaceFlinger != null) { |
| 92 | final Parcel data = Parcel.obtain(); |
| 93 | final Parcel reply = Parcel.obtain(); |
| 94 | data.writeInterfaceToken(SURFACE_COMPOSER_INTERFACE_KEY); |
| 95 | data.writeInt(SETTING_VALUE_QUERY); |
| 96 | mSurfaceFlinger.transact(SURFACE_FLINGER_CODE, data, reply, 0 /* flags */); |
| 97 | final boolean enabled = reply.readBoolean(); |
| 98 | ((SwitchPreference) mPreference).setChecked(enabled); |
| 99 | reply.recycle(); |
| 100 | data.recycle(); |
| 101 | } |
| 102 | } catch (RemoteException ex) { |
| 103 | // intentional no-op |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | @VisibleForTesting |
| 108 | void writeShowRefreshRateSetting(boolean isEnabled) { |
| 109 | try { |
| 110 | if (mSurfaceFlinger != null) { |
| 111 | final Parcel data = Parcel.obtain(); |
| 112 | data.writeInterfaceToken(SURFACE_COMPOSER_INTERFACE_KEY); |
| 113 | final int showRefreshRate = isEnabled ? SETTING_VALUE_ON : SETTING_VALUE_OFF; |
| 114 | data.writeInt(showRefreshRate); |
| 115 | mSurfaceFlinger.transact(SURFACE_FLINGER_CODE, data, |
| 116 | null /* reply */, 0 /* flags */); |
| 117 | data.recycle(); |
| 118 | } |
| 119 | } catch (RemoteException ex) { |
| 120 | // intentional no-op |
| 121 | } |
| 122 | updateShowRefreshRateSetting(); |
| 123 | } |
| 124 | } |