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Commit 59358072 authored by Massimo Carli's avatar Massimo Carli
Browse files

Letterbox Reacheability Multiplier Persistence 

Persist values for horizontal and vertical position multipliers.

Test: atest LetterboxConfigurationTest LetterboxConfigurationPersisterTest
Fixes: 199434061

Change-Id: I194828be402ff1fd234e371055522962647a4d32
parent fc3a434b

proto/src/task_snapshot.proto

deleted100644 → 0
+0 −48
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2017 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.

 */



 syntax = "proto3";



 package com.android.server.wm;



 option java_package = "com.android.server.wm";

 option java_outer_classname = "WindowManagerProtos";



 message TaskSnapshotProto {

     int32 orientation = 1;

     int32 inset_left = 2;

     int32 inset_top = 3;

     int32 inset_right = 4;

     int32 inset_bottom = 5;

     bool is_real_snapshot = 6;

     int32 windowing_mode = 7;

     int32 system_ui_visibility = 8 [deprecated=true];

     bool is_translucent = 9;

     string top_activity_component = 10;

     // deprecated because original width and height are stored now instead of the scale.

     float legacy_scale = 11 [deprecated=true];

     int64 id = 12;

     int32 rotation = 13;

     // The task width when the snapshot was taken

     int32 task_width = 14;

     // The task height when the snapshot was taken

     int32 task_height = 15;

     int32 appearance = 16;

     int32 letterbox_inset_left = 17;

     int32 letterbox_inset_top = 18;

     int32 letterbox_inset_right = 19;

     int32 letterbox_inset_bottom = 20;

 }

proto/src/windowmanager.proto

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+71 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 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.

 */



syntax = "proto3";



package com.android.server.wm;



option java_package = "com.android.server.wm";

option java_outer_classname = "WindowManagerProtos";



message TaskSnapshotProto {

  int32 orientation = 1;

  int32 inset_left = 2;

  int32 inset_top = 3;

  int32 inset_right = 4;

  int32 inset_bottom = 5;

  bool is_real_snapshot = 6;

  int32 windowing_mode = 7;

  int32 system_ui_visibility = 8 [deprecated=true];

  bool is_translucent = 9;

  string top_activity_component = 10;

  // deprecated because original width and height are stored now instead of the scale.

  float legacy_scale = 11 [deprecated=true];

  int64 id = 12;

  int32 rotation = 13;

  // The task width when the snapshot was taken

  int32 task_width = 14;

  // The task height when the snapshot was taken

  int32 task_height = 15;

  int32 appearance = 16;

  int32 letterbox_inset_left = 17;

  int32 letterbox_inset_top = 18;

  int32 letterbox_inset_right = 19;

  int32 letterbox_inset_bottom = 20;

}



// Persistent letterboxing configurations

message LetterboxProto {



  // Possible values for the letterbox horizontal reachability

  enum LetterboxHorizontalReachability {

    LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_LEFT = 0;

    LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_CENTER = 1;

    LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_RIGHT = 2;

  }



  // Possible values for the letterbox vertical reachability

  enum LetterboxVerticalReachability {

    LETTERBOX_VERTICAL_REACHABILITY_POSITION_TOP = 0;

    LETTERBOX_VERTICAL_REACHABILITY_POSITION_CENTER = 1;

    LETTERBOX_VERTICAL_REACHABILITY_POSITION_BOTTOM = 2;

  }



  // Represents the current horizontal position for the letterboxed activity

  LetterboxHorizontalReachability letterbox_position_for_horizontal_reachability = 1;

  // Represents the current vertical position for the letterboxed activity

  LetterboxVerticalReachability letterbox_position_for_vertical_reachability = 2;

}
 
 No newline at end of file

services/core/java/com/android/server/wm/LetterboxConfiguration.java

+57 −40
Original line number Diff line number Diff line
@@ -17,14 +17,17 @@ 
package com.android.server.wm;



import android.annotation.IntDef;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.content.Context;

import android.graphics.Color;



import com.android.internal.R;

import com.android.internal.annotations.VisibleForTesting;



import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.util.function.Function;



/** Reads letterbox configs from resources and controls their overrides at runtime. */

final class LetterboxConfiguration {
@@ -156,34 +159,25 @@ final class LetterboxConfiguration { 
    // portrait device orientation.

    private boolean mIsVerticalReachabilityEnabled;





    // Horizontal position of a center of the letterboxed app window which is global to prevent

    // "jumps" when switching between letterboxed apps. It's updated to reposition the app window

    // in response to a double tap gesture (see LetterboxUiController#handleDoubleTap). Used in

    // LetterboxUiController#getHorizontalPositionMultiplier which is called from

    // ActivityRecord#updateResolvedBoundsPosition.

    // TODO(b/199426138): Global reachability setting causes a jump when resuming an app from

    // Overview after changing position in another app.

    @LetterboxHorizontalReachabilityPosition

    private volatile int mLetterboxPositionForHorizontalReachability;



    // Vertical position of a center of the letterboxed app window which is global to prevent

    // "jumps" when switching between letterboxed apps. It's updated to reposition the app window

    // in response to a double tap gesture (see LetterboxUiController#handleDoubleTap). Used in

    // LetterboxUiController#getVerticalPositionMultiplier which is called from

    // ActivityRecord#updateResolvedBoundsPosition.

    // TODO(b/199426138): Global reachability setting causes a jump when resuming an app from

    // Overview after changing position in another app.

    @LetterboxVerticalReachabilityPosition

    private volatile int mLetterboxPositionForVerticalReachability;



    // Whether education is allowed for letterboxed fullscreen apps.

    private boolean mIsEducationEnabled;



    // Whether using split screen aspect ratio as a default aspect ratio for unresizable apps.

    private boolean mIsSplitScreenAspectRatioForUnresizableAppsEnabled;



    // Responsible for the persistence of letterbox[Horizontal|Vertical]PositionMultiplier

    @NonNull

    private final LetterboxConfigurationPersister mLetterboxConfigurationPersister;



    LetterboxConfiguration(Context systemUiContext) {

        this(systemUiContext, new LetterboxConfigurationPersister(systemUiContext,

                () -> readLetterboxHorizontalReachabilityPositionFromConfig(systemUiContext),

                () -> readLetterboxVerticalReachabilityPositionFromConfig(systemUiContext)));

    }



    @VisibleForTesting

    LetterboxConfiguration(Context systemUiContext,

            LetterboxConfigurationPersister letterboxConfigurationPersister) {

        mContext = systemUiContext;

        mFixedOrientationLetterboxAspectRatio = mContext.getResources().getFloat(

                R.dimen.config_fixedOrientationLetterboxAspectRatio);
@@ -206,14 +200,14 @@ final class LetterboxConfiguration { 
                readLetterboxHorizontalReachabilityPositionFromConfig(mContext);

        mDefaultPositionForVerticalReachability =

                readLetterboxVerticalReachabilityPositionFromConfig(mContext);

        mLetterboxPositionForHorizontalReachability = mDefaultPositionForHorizontalReachability;

        mLetterboxPositionForVerticalReachability = mDefaultPositionForVerticalReachability;

        mIsEducationEnabled = mContext.getResources().getBoolean(

                R.bool.config_letterboxIsEducationEnabled);

        setDefaultMinAspectRatioForUnresizableApps(mContext.getResources().getFloat(

                R.dimen.config_letterboxDefaultMinAspectRatioForUnresizableApps));

        mIsSplitScreenAspectRatioForUnresizableAppsEnabled = mContext.getResources().getBoolean(

                R.bool.config_letterboxIsSplitScreenAspectRatioForUnresizableAppsEnabled);

        mLetterboxConfigurationPersister = letterboxConfigurationPersister;

        mLetterboxConfigurationPersister.start();

    }



    /**
@@ -653,7 +647,9 @@ final class LetterboxConfiguration { 
     * <p>The position multiplier is changed after each double tap in the letterbox area.

     */

    float getHorizontalMultiplierForReachability() {

        switch (mLetterboxPositionForHorizontalReachability) {

        final int letterboxPositionForHorizontalReachability =

                mLetterboxConfigurationPersister.getLetterboxPositionForHorizontalReachability();

        switch (letterboxPositionForHorizontalReachability) {

            case LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_LEFT:

                return 0.0f;

            case LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_CENTER:
@@ -663,9 +659,10 @@ final class LetterboxConfiguration { 
            default:

                throw new AssertionError(

                        "Unexpected letterbox position type: "

                            + mLetterboxPositionForHorizontalReachability);

                                + letterboxPositionForHorizontalReachability);

        }

    }



    /*

     * Gets vertical position of a center of the letterboxed app window when reachability

     * is enabled specified. 0 corresponds to the top side of the screen and 1 to the bottom side.
@@ -673,7 +670,9 @@ final class LetterboxConfiguration { 
     * <p>The position multiplier is changed after each double tap in the letterbox area.

     */

    float getVerticalMultiplierForReachability() {

        switch (mLetterboxPositionForVerticalReachability) {

        final int letterboxPositionForVerticalReachability =

                mLetterboxConfigurationPersister.getLetterboxPositionForVerticalReachability();

        switch (letterboxPositionForVerticalReachability) {

            case LETTERBOX_VERTICAL_REACHABILITY_POSITION_TOP:

                return 0.0f;

            case LETTERBOX_VERTICAL_REACHABILITY_POSITION_CENTER:
@@ -683,7 +682,7 @@ final class LetterboxConfiguration { 
            default:

                throw new AssertionError(

                        "Unexpected letterbox position type: "

                                + mLetterboxPositionForVerticalReachability);

                                + letterboxPositionForVerticalReachability);

        }

    }
@@ -693,7 +692,7 @@ final class LetterboxConfiguration { 
     */

    @LetterboxHorizontalReachabilityPosition

    int getLetterboxPositionForHorizontalReachability() {

        return mLetterboxPositionForHorizontalReachability;

        return mLetterboxConfigurationPersister.getLetterboxPositionForHorizontalReachability();

    }



    /*
@@ -702,7 +701,7 @@ final class LetterboxConfiguration { 
     */

    @LetterboxVerticalReachabilityPosition

    int getLetterboxPositionForVerticalReachability() {

        return mLetterboxPositionForVerticalReachability;

        return mLetterboxConfigurationPersister.getLetterboxPositionForVerticalReachability();

    }



    /** Returns a string representing the given {@link LetterboxHorizontalReachabilityPosition}. */
@@ -742,9 +741,8 @@ final class LetterboxConfiguration { 
     * right side.

     */

    void movePositionForHorizontalReachabilityToNextRightStop() {

        mLetterboxPositionForHorizontalReachability = Math.min(

                mLetterboxPositionForHorizontalReachability + 1,

                LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_RIGHT);

        updatePositionForHorizontalReachability(prev -> Math.min(

                prev + 1, LETTERBOX_HORIZONTAL_REACHABILITY_POSITION_RIGHT));

    }



    /**
@@ -752,8 +750,7 @@ final class LetterboxConfiguration { 
     * side.

     */

    void movePositionForHorizontalReachabilityToNextLeftStop() {

        mLetterboxPositionForHorizontalReachability =

                Math.max(mLetterboxPositionForHorizontalReachability - 1, 0);

        updatePositionForHorizontalReachability(prev -> Math.max(prev - 1, 0));

    }



    /**
@@ -761,9 +758,8 @@ final class LetterboxConfiguration { 
     * side.

     */

    void movePositionForVerticalReachabilityToNextBottomStop() {

        mLetterboxPositionForVerticalReachability = Math.min(

                mLetterboxPositionForVerticalReachability + 1,

                LETTERBOX_VERTICAL_REACHABILITY_POSITION_BOTTOM);

        updatePositionForVerticalReachability(prev -> Math.min(

                prev + 1, LETTERBOX_VERTICAL_REACHABILITY_POSITION_BOTTOM));

    }



    /**
@@ -771,8 +767,7 @@ final class LetterboxConfiguration { 
     * side.

     */

    void movePositionForVerticalReachabilityToNextTopStop() {

        mLetterboxPositionForVerticalReachability =

                Math.max(mLetterboxPositionForVerticalReachability - 1, 0);

        updatePositionForVerticalReachability(prev -> Math.max(prev - 1, 0));

    }



    /**
@@ -822,4 +817,26 @@ final class LetterboxConfiguration { 
                R.bool.config_letterboxIsSplitScreenAspectRatioForUnresizableAppsEnabled);

    }



    /** Calculates a new letterboxPositionForHorizontalReachability value and updates the store */

    private void updatePositionForHorizontalReachability(

            Function<Integer, Integer> newHorizonalPositionFun) {

        final int letterboxPositionForHorizontalReachability =

                mLetterboxConfigurationPersister.getLetterboxPositionForHorizontalReachability();

        final int nextHorizontalPosition = newHorizonalPositionFun.apply(

                letterboxPositionForHorizontalReachability);

        mLetterboxConfigurationPersister.setLetterboxPositionForHorizontalReachability(

                nextHorizontalPosition);

    }



    /** Calculates a new letterboxPositionForVerticalReachability value and updates the store */

    private void updatePositionForVerticalReachability(

            Function<Integer, Integer> newVerticalPositionFun) {

        final int letterboxPositionForVerticalReachability =

                mLetterboxConfigurationPersister.getLetterboxPositionForVerticalReachability();

        final int nextVerticalPosition = newVerticalPositionFun.apply(

                letterboxPositionForVerticalReachability);

        mLetterboxConfigurationPersister.setLetterboxPositionForVerticalReachability(

                nextVerticalPosition);

    }



}

services/core/java/com/android/server/wm/LetterboxConfigurationPersister.java

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Original line number Diff line number Diff line 
/*

 * Copyright (C) 2022 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.server.wm;



import static com.android.server.wm.WindowManagerDebugConfig.TAG_WITH_CLASS_NAME;

import static com.android.server.wm.WindowManagerDebugConfig.TAG_WM;



import android.annotation.NonNull;

import android.annotation.Nullable;

import android.content.Context;

import android.os.Environment;

import android.util.AtomicFile;

import android.util.Slog;



import com.android.internal.annotations.VisibleForTesting;

import com.android.server.wm.LetterboxConfiguration.LetterboxHorizontalReachabilityPosition;

import com.android.server.wm.LetterboxConfiguration.LetterboxVerticalReachabilityPosition;

import com.android.server.wm.nano.WindowManagerProtos;



import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.function.Consumer;

import java.util.function.Supplier;



/**

 * Persists the values of letterboxPositionForHorizontalReachability and

 * letterboxPositionForVerticalReachability for {@link LetterboxConfiguration}.

 */

class LetterboxConfigurationPersister {



    private static final String TAG =

            TAG_WITH_CLASS_NAME ? "LetterboxConfigurationPersister" : TAG_WM;



    @VisibleForTesting

    static final String LETTERBOX_CONFIGURATION_FILENAME = "letterbox_config";



    private final Context mContext;

    private final Supplier<Integer> mDefaultHorizontalReachabilitySupplier;

    private final Supplier<Integer> mDefaultVerticalReachabilitySupplier;



    // Horizontal position of a center of the letterboxed app window which is global to prevent

    // "jumps" when switching between letterboxed apps. It's updated to reposition the app window

    // in response to a double tap gesture (see LetterboxUiController#handleDoubleTap). Used in

    // LetterboxUiController#getHorizontalPositionMultiplier which is called from

    // ActivityRecord#updateResolvedBoundsPosition.

    @LetterboxHorizontalReachabilityPosition

    private volatile int mLetterboxPositionForHorizontalReachability;



    // Vertical position of a center of the letterboxed app window which is global to prevent

    // "jumps" when switching between letterboxed apps. It's updated to reposition the app window

    // in response to a double tap gesture (see LetterboxUiController#handleDoubleTap). Used in

    // LetterboxUiController#getVerticalPositionMultiplier which is called from

    // ActivityRecord#updateResolvedBoundsPosition.

    @LetterboxVerticalReachabilityPosition

    private volatile int mLetterboxPositionForVerticalReachability;



    @NonNull

    private final AtomicFile mConfigurationFile;



    @Nullable

    private final Consumer<String> mCompletionCallback;



    @NonNull

    private final PersisterQueue mPersisterQueue;



    LetterboxConfigurationPersister(Context systemUiContext,

            Supplier<Integer> defaultHorizontalReachabilitySupplier,

            Supplier<Integer> defaultVerticalReachabilitySupplier) {

        this(systemUiContext, defaultHorizontalReachabilitySupplier,

                defaultVerticalReachabilitySupplier,

                Environment.getDataSystemDirectory(), new PersisterQueue(),

                /* completionCallback */ null);

    }



    @VisibleForTesting

    LetterboxConfigurationPersister(Context systemUiContext,

            Supplier<Integer> defaultHorizontalReachabilitySupplier,

            Supplier<Integer> defaultVerticalReachabilitySupplier, File configFolder,

            PersisterQueue persisterQueue, @Nullable Consumer<String> completionCallback) {

        mContext = systemUiContext.createDeviceProtectedStorageContext();

        mDefaultHorizontalReachabilitySupplier = defaultHorizontalReachabilitySupplier;

        mDefaultVerticalReachabilitySupplier = defaultVerticalReachabilitySupplier;

        mCompletionCallback = completionCallback;

        final File prefFiles = new File(configFolder, LETTERBOX_CONFIGURATION_FILENAME);

        mConfigurationFile = new AtomicFile(prefFiles);

        mPersisterQueue = persisterQueue;

        readCurrentConfiguration();

    }



    /**

     * Startes the persistence queue

     */

    void start() {

        mPersisterQueue.startPersisting();

    }



    /*

     * Gets the horizontal position of the letterboxed app window when horizontal reachability is

     * enabled.

     */

    @LetterboxHorizontalReachabilityPosition

    int getLetterboxPositionForHorizontalReachability() {

        return mLetterboxPositionForHorizontalReachability;

    }



    /*

     * Gets the vertical position of the letterboxed app window when vertical reachability is

     * enabled.

     */

    @LetterboxVerticalReachabilityPosition

    int getLetterboxPositionForVerticalReachability() {

        return mLetterboxPositionForVerticalReachability;

    }



    /**

     * Updates letterboxPositionForVerticalReachability if different from the current value

     */

    void setLetterboxPositionForHorizontalReachability(

            int letterboxPositionForHorizontalReachability) {

        if (mLetterboxPositionForHorizontalReachability

                != letterboxPositionForHorizontalReachability) {

            mLetterboxPositionForHorizontalReachability =

                    letterboxPositionForHorizontalReachability;

            updateConfiguration();

        }

    }



    /**

     * Updates letterboxPositionForVerticalReachability if different from the current value

     */

    void setLetterboxPositionForVerticalReachability(

            int letterboxPositionForVerticalReachability) {

        if (mLetterboxPositionForVerticalReachability != letterboxPositionForVerticalReachability) {

            mLetterboxPositionForVerticalReachability = letterboxPositionForVerticalReachability;

            updateConfiguration();

        }

    }



    @VisibleForTesting

    void useDefaultValue() {

        mLetterboxPositionForHorizontalReachability = mDefaultHorizontalReachabilitySupplier.get();

        mLetterboxPositionForVerticalReachability = mDefaultVerticalReachabilitySupplier.get();

    }



    private void readCurrentConfiguration() {

        FileInputStream fis = null;

        try {

            fis = mConfigurationFile.openRead();

            byte[] protoData = readInputStream(fis);

            final WindowManagerProtos.LetterboxProto letterboxData =

                    WindowManagerProtos.LetterboxProto.parseFrom(protoData);

            mLetterboxPositionForHorizontalReachability =

                    letterboxData.letterboxPositionForHorizontalReachability;

            mLetterboxPositionForVerticalReachability =

                    letterboxData.letterboxPositionForVerticalReachability;

        } catch (IOException ioe) {

            Slog.e(TAG,

                    "Error reading from LetterboxConfigurationPersister. "

                            + "Using default values!", ioe);

            useDefaultValue();

        } finally {

            if (fis != null) {

                try {

                    fis.close();

                } catch (IOException e) {

                    useDefaultValue();

                    Slog.e(TAG, "Error reading from LetterboxConfigurationPersister ", e);

                }

            }

        }

    }



    private void updateConfiguration() {

        mPersisterQueue.addItem(new UpdateValuesCommand(mConfigurationFile,

                mLetterboxPositionForHorizontalReachability,

                mLetterboxPositionForVerticalReachability,

                mCompletionCallback), /* flush */ true);

    }



    private static byte[] readInputStream(InputStream in) throws IOException {

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();

        try {

            byte[] buffer = new byte[1024];

            int size = in.read(buffer);

            while (size > 0) {

                outputStream.write(buffer, 0, size);

                size = in.read(buffer);

            }

            return outputStream.toByteArray();

        } finally {

            outputStream.close();

        }

    }



    private static class UpdateValuesCommand implements

            PersisterQueue.WriteQueueItem<UpdateValuesCommand> {



        @NonNull

        private final AtomicFile mFileToUpdate;

        @Nullable

        private final Consumer<String> mOnComplete;





        private final int mHorizontalReachability;

        private final int mVerticalReachability;



        UpdateValuesCommand(@NonNull AtomicFile fileToUpdate,

                int horizontalReachability, int verticalReachability,

                @Nullable Consumer<String> onComplete) {

            mFileToUpdate = fileToUpdate;

            mHorizontalReachability = horizontalReachability;

            mVerticalReachability = verticalReachability;

            mOnComplete = onComplete;

        }



        @Override

        public void process() {

            final WindowManagerProtos.LetterboxProto letterboxData =

                    new WindowManagerProtos.LetterboxProto();

            letterboxData.letterboxPositionForHorizontalReachability = mHorizontalReachability;

            letterboxData.letterboxPositionForVerticalReachability = mVerticalReachability;

            final byte[] bytes = WindowManagerProtos.LetterboxProto.toByteArray(letterboxData);



            FileOutputStream fos = null;

            try {

                fos = mFileToUpdate.startWrite();

                fos.write(bytes);

                mFileToUpdate.finishWrite(fos);

            } catch (IOException ioe) {

                mFileToUpdate.failWrite(fos);

                Slog.e(TAG,

                        "Error writing to LetterboxConfigurationPersister. "

                                + "Using default values!", ioe);

            } finally {

                if (mOnComplete != null) {

                    mOnComplete.accept("UpdateValuesCommand");

                }

            }

        }

    }

}

services/tests/wmtests/src/com/android/server/wm/LetterboxConfigurationPersisterTest.java

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