Flexera-Launcher/lawnchair/src/com/android/wm/shell/util/GroupedRecentTaskInfo.java

/*
 * 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.wm.shell.util;

import android.annotation.IntDef;
import android.app.ActivityManager;
import android.app.WindowConfiguration;
import android.os.Parcel;
import android.os.Parcelable;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import java.util.Arrays;
import java.util.List;

/**
 * Simple container for recent tasks.  May contain either a single or pair of tasks.
 */
public class GroupedRecentTaskInfo implements Parcelable {

    public static final int TYPE_SINGLE = 1;
    public static final int TYPE_SPLIT = 2;
    public static final int TYPE_FREEFORM = 3;

    @IntDef(prefix = {"TYPE_"}, value = {
            TYPE_SINGLE ,
            TYPE_SPLIT ,
            TYPE_FREEFORM
    })
    public @interface GroupType {
    }

    @NonNull
    private final ActivityManager.RecentTaskInfo[] mTasks;
    @Nullable
    private final SplitBounds mSplitBounds;
    @GroupType
    private final int mType;

    /**
     * Create new for a single task
     */

    public static GroupedRecentTaskInfo forSingleTask(
            @NonNull ActivityManager.RecentTaskInfo task) {
        return new GroupedRecentTaskInfo (new ActivityManager.RecentTaskInfo[]{task} , null ,
                TYPE_SINGLE);
    }

    /**
     * Create new for a pair of tasks in split screen
     */
    public static GroupedRecentTaskInfo forSplitTasks(@NonNull ActivityManager.RecentTaskInfo task1 ,
                                                      @NonNull ActivityManager.RecentTaskInfo task2 , @Nullable SplitBounds splitBounds) {
        return new GroupedRecentTaskInfo (new ActivityManager.RecentTaskInfo[]{task1 , task2} ,
                splitBounds , TYPE_SPLIT);
    }

    /**
     * Create new for a group of freeform tasks
     */
    public static GroupedRecentTaskInfo forFreeformTasks(
            @NonNull ActivityManager.RecentTaskInfo... tasks) {
        return new GroupedRecentTaskInfo (tasks , null , TYPE_FREEFORM);
    }

    private GroupedRecentTaskInfo(@NonNull ActivityManager.RecentTaskInfo[] tasks ,
                                  @Nullable SplitBounds splitBounds , @GroupType int type) {
        mTasks = tasks;
        mSplitBounds = splitBounds;
        mType = type;
    }

    GroupedRecentTaskInfo(Parcel parcel) {
        mTasks = parcel.createTypedArray(ActivityManager.RecentTaskInfo.CREATOR);
        mSplitBounds = parcel.readTypedObject(SplitBounds.CREATOR);
        mType = parcel.readInt();
    }

    /**
     * Get primary {@link ActivityManager.RecentTaskInfo}
     */
    @NonNull
    public ActivityManager.RecentTaskInfo getTaskInfo1() {
        return mTasks[0];
    }

    /**
     * Get secondary {@link ActivityManager.RecentTaskInfo}.
     * <p>
     * Used in split screen.
     */
    @Nullable
    public ActivityManager.RecentTaskInfo getTaskInfo2() {
        if (mTasks.length > 1) {
            return mTasks[1];
        }
        return null;
    }

    /**
     * Get all {@link ActivityManager.RecentTaskInfo}s grouped together.
     */
    @NonNull
    public List<ActivityManager.RecentTaskInfo> getTaskInfoList() {
        return Arrays.asList (mTasks);
    }

    /**
     * Return {@link SplitBounds} if this is a split screen entry or {@code null}
     */
    @Nullable
    public SplitBounds getSplitBounds() {
        return mSplitBounds;
    }

    /**
     * Get type of this recents entry. One of {@link GroupType}
     */
    @GroupType
    public int getType() {
        return mType;
    }

    @Override
    public String toString() {
        StringBuilder taskString = new StringBuilder ( );
        for (int i = 0; i < mTasks.length; i++) {
            if (i == 0) {
                taskString.append ("Task");
            } else {
                taskString.append (", Task");
            }
            taskString.append (i + 1).append (": ").append (getTaskInfo (mTasks[i]));
        }
        if (mSplitBounds != null) {
            taskString.append (", SplitBounds: ").append (mSplitBounds);
        }
        taskString.append (", Type=");
        switch (mType) {
            case TYPE_SINGLE:
                taskString.append ("TYPE_SINGLE");
                break;
            case TYPE_SPLIT:
                taskString.append ("TYPE_SPLIT");
                break;
            case TYPE_FREEFORM:
                taskString.append ("TYPE_FREEFORM");
                break;
        }
        return taskString.toString();
    }

    private String getTaskInfo(ActivityManager.RecentTaskInfo taskInfo) {
        if (taskInfo == null) {
            return null;
        }
        return "id=" + taskInfo.taskId
                + " baseIntent=" + (taskInfo.baseIntent != null
                ? taskInfo.baseIntent.getComponent ( )
                : "null")
                + " winMode=" + WindowConfiguration.windowingModeToString (
                taskInfo.getWindowingMode());
    }

    @Override
    public void writeToParcel(Parcel parcel , int flags) {
        parcel.writeTypedArray(mTasks , flags);
        parcel.writeTypedObject(mSplitBounds , flags);
        parcel.writeInt(mType);
    }

    @Override
    public int describeContents() {
        return 0;
    }

    public static final @android.annotation.NonNull Creator<GroupedRecentTaskInfo> CREATOR =
            new Creator<GroupedRecentTaskInfo> ( ) {
                public GroupedRecentTaskInfo createFromParcel(Parcel source) {
                    return new GroupedRecentTaskInfo(source);
                }

                public GroupedRecentTaskInfo[] newArray(int size) {
                    return new GroupedRecentTaskInfo[size];
                }
            };
}