android/window/TaskFragmentOperation.java

/*
 * Copyright (C) 2023 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 android.window;

import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.Intent;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Parcel;
import android.os.Parcelable;
import android.view.SurfaceControl;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Objects;

/**
 * Data object of params for TaskFragment related {@link WindowContainerTransaction} operation.
 *
 * @see WindowContainerTransaction#addTaskFragmentOperation(IBinder, TaskFragmentOperation).
 * @hide
 */
public final class TaskFragmentOperation implements Parcelable {

    /**
     * Type for tracking other unknown TaskFragment operation that is not set through
     * {@link TaskFragmentOperation}, such as invalid request.
     */
    public static final int OP_TYPE_UNKNOWN = -1;

    /** Creates a new TaskFragment. */
    public static final int OP_TYPE_CREATE_TASK_FRAGMENT = 0;

    /** Deletes the given TaskFragment. */
    public static final int OP_TYPE_DELETE_TASK_FRAGMENT = 1;

    /** Starts an Activity in the given TaskFragment. */
    public static final int OP_TYPE_START_ACTIVITY_IN_TASK_FRAGMENT = 2;

    /** Reparents the given Activity to the given TaskFragment. */
    public static final int OP_TYPE_REPARENT_ACTIVITY_TO_TASK_FRAGMENT = 3;

    /** Sets two TaskFragments adjacent to each other. */
    public static final int OP_TYPE_SET_ADJACENT_TASK_FRAGMENTS = 4;

    /** Clears the adjacent TaskFragments relationship. */
    public static final int OP_TYPE_CLEAR_ADJACENT_TASK_FRAGMENTS = 5;

    /** Requests focus on the top running Activity in the given TaskFragment. */
    public static final int OP_TYPE_REQUEST_FOCUS_ON_TASK_FRAGMENT = 6;

    /** Sets a given TaskFragment to have a companion TaskFragment. */
    public static final int OP_TYPE_SET_COMPANION_TASK_FRAGMENT = 7;

    /** Sets the {@link TaskFragmentAnimationParams} for the given TaskFragment. */
    public static final int OP_TYPE_SET_ANIMATION_PARAMS = 8;

    /** Sets the relative bounds with {@link WindowContainerTransaction#setRelativeBounds}. */
    public static final int OP_TYPE_SET_RELATIVE_BOUNDS = 9;

    /**
     * Reorders the TaskFragment to be the front-most TaskFragment in the Task.
     * Note that there could still have other WindowContainer on top of the front-most
     * TaskFragment, such as a non-embedded Activity.
     */
    public static final int OP_TYPE_REORDER_TO_FRONT = 10;

    /**
     * Sets the activity navigation to be isolated, where the activity navigation on the
     * TaskFragment is separated from the rest activities in the Task. Activities cannot be
     * started on an isolated TaskFragment unless explicitly requested to. That said, new launched
     * activities should be positioned as a sibling to the TaskFragment with higher z-ordering.
     */
    public static final int OP_TYPE_SET_ISOLATED_NAVIGATION = 11;

    /**
     * Reorders the TaskFragment to be the bottom-most in the Task. Note that this op will bring the
     * TaskFragment to the bottom of the Task below all the other Activities and TaskFragments.
     *
     * This is only allowed for system organizers. See
     * {@link com.android.server.wm.TaskFragmentOrganizerController#registerOrganizer(
     * ITaskFragmentOrganizer, boolean)}
     */
    public static final int OP_TYPE_REORDER_TO_BOTTOM_OF_TASK = 12;

    /**
     * Reorders the TaskFragment to be the top-most in the Task. Note that this op will bring the
     * TaskFragment to the top of the Task above all the other Activities and TaskFragments.
     *
     * This is only allowed for system organizers. See
     * {@link com.android.server.wm.TaskFragmentOrganizerController#registerOrganizer(
     * ITaskFragmentOrganizer, boolean)}
     */
    public static final int OP_TYPE_REORDER_TO_TOP_OF_TASK = 13;

    /**
     * Creates a decor surface in the parent Task of the TaskFragment. The created decor surface
     * will be provided in {@link TaskFragmentTransaction#TYPE_TASK_FRAGMENT_PARENT_INFO_CHANGED}
     * event callback. If a decor surface already exists in the parent Task, the current
     * TaskFragment will become the new owner of the decor surface and the decor surface will be
     * moved above the TaskFragment.
     *
     * The decor surface can be used to draw the divider between TaskFragments or other decorations.
     */
    public static final int OP_TYPE_CREATE_OR_MOVE_TASK_FRAGMENT_DECOR_SURFACE = 14;

    /**
     * Removes the decor surface in the parent Task of the TaskFragment.
     */
    public static final int OP_TYPE_REMOVE_TASK_FRAGMENT_DECOR_SURFACE = 15;

    /**
     * Applies dimming on the parent Task which could cross two TaskFragments.
     */
    public static final int OP_TYPE_SET_DIM_ON_TASK = 16;

    /**
     * Sets this TaskFragment to move to bottom of the Task if any of the activities below it is
     * launched in a mode requiring clear top.
     *
     * This is only allowed for system organizers. See
     * {@link com.android.server.wm.TaskFragmentOrganizerController#registerOrganizer(
     * ITaskFragmentOrganizer, boolean)}
     */
    public static final int OP_TYPE_SET_MOVE_TO_BOTTOM_IF_CLEAR_WHEN_LAUNCH = 17;

    /**
     * Sets whether the decor surface will be boosted. When not boosted, the decor surface is placed
     * below any TaskFragments in untrusted mode or any activities with uid different from the
     * TaskFragmentOrganizer uid and just above its owner TaskFragment; when boosted, the decor
     * surface is placed above all the non-boosted windows in the Task, the content of these
     * non-boosted windows will be hidden and inputs are disabled.
     */
    public static final int OP_TYPE_SET_DECOR_SURFACE_BOOSTED = 18;

    /**
     * Sets the TaskFragment to be pinned.
     * <p>
     * If a TaskFragment is pinned, the TaskFragment should be the top-most TaskFragment among other
     * sibling TaskFragments. Any newly launched and embeddable activity should not be placed in the
     * pinned TaskFragment, unless the activity is launched from the pinned TaskFragment or
     * explicitly requested to. Non-embeddable activities are not restricted to.
     * <p>
     * See {@link #OP_TYPE_REORDER_TO_FRONT} on how to reorder a pinned TaskFragment to the top.
     */
    public static final int OP_TYPE_SET_PINNED = 19;

    @IntDef(prefix = { "OP_TYPE_" }, value = {
            OP_TYPE_UNKNOWN,
            OP_TYPE_CREATE_TASK_FRAGMENT,
            OP_TYPE_DELETE_TASK_FRAGMENT,
            OP_TYPE_START_ACTIVITY_IN_TASK_FRAGMENT,
            OP_TYPE_REPARENT_ACTIVITY_TO_TASK_FRAGMENT,
            OP_TYPE_SET_ADJACENT_TASK_FRAGMENTS,
            OP_TYPE_CLEAR_ADJACENT_TASK_FRAGMENTS,
            OP_TYPE_REQUEST_FOCUS_ON_TASK_FRAGMENT,
            OP_TYPE_SET_COMPANION_TASK_FRAGMENT,
            OP_TYPE_SET_ANIMATION_PARAMS,
            OP_TYPE_SET_RELATIVE_BOUNDS,
            OP_TYPE_REORDER_TO_FRONT,
            OP_TYPE_SET_ISOLATED_NAVIGATION,
            OP_TYPE_REORDER_TO_BOTTOM_OF_TASK,
            OP_TYPE_REORDER_TO_TOP_OF_TASK,
            OP_TYPE_CREATE_OR_MOVE_TASK_FRAGMENT_DECOR_SURFACE,
            OP_TYPE_REMOVE_TASK_FRAGMENT_DECOR_SURFACE,
            OP_TYPE_SET_DIM_ON_TASK,
            OP_TYPE_SET_MOVE_TO_BOTTOM_IF_CLEAR_WHEN_LAUNCH,
            OP_TYPE_SET_DECOR_SURFACE_BOOSTED,
            OP_TYPE_SET_PINNED,
    })
    @Retention(RetentionPolicy.SOURCE)
    public @interface OperationType {}

    @OperationType
    private final int mOpType;

    @Nullable
    private final TaskFragmentCreationParams mTaskFragmentCreationParams;

    @Nullable
    private final IBinder mActivityToken;

    @Nullable
    private final Intent mActivityIntent;

    @Nullable
    private final Bundle mBundle;

    @Nullable
    private final IBinder mSecondaryFragmentToken;

    @Nullable
    private final TaskFragmentAnimationParams mAnimationParams;

    private final boolean mBooleanValue;

    @Nullable
    private final SurfaceControl.Transaction mSurfaceTransaction;

    private TaskFragmentOperation(@OperationType int opType,
            @Nullable TaskFragmentCreationParams taskFragmentCreationParams,
            @Nullable IBinder activityToken, @Nullable Intent activityIntent,
            @Nullable Bundle bundle, @Nullable IBinder secondaryFragmentToken,
            @Nullable TaskFragmentAnimationParams animationParams,
            boolean booleanValue, @Nullable SurfaceControl.Transaction surfaceTransaction) {
        mOpType = opType;
        mTaskFragmentCreationParams = taskFragmentCreationParams;
        mActivityToken = activityToken;
        mActivityIntent = activityIntent;
        mBundle = bundle;
        mSecondaryFragmentToken = secondaryFragmentToken;
        mAnimationParams = animationParams;
        mBooleanValue = booleanValue;
        mSurfaceTransaction = surfaceTransaction;
    }

    private TaskFragmentOperation(Parcel in) {
        mOpType = in.readInt();
        mTaskFragmentCreationParams = in.readTypedObject(TaskFragmentCreationParams.CREATOR);
        mActivityToken = in.readStrongBinder();
        mActivityIntent = in.readTypedObject(Intent.CREATOR);
        mBundle = in.readBundle(getClass().getClassLoader());
        mSecondaryFragmentToken = in.readStrongBinder();
        mAnimationParams = in.readTypedObject(TaskFragmentAnimationParams.CREATOR);
        mBooleanValue = in.readBoolean();
        mSurfaceTransaction = in.readTypedObject(SurfaceControl.Transaction.CREATOR);
    }

    @Override
    public void writeToParcel(@NonNull Parcel dest, int flags) {
        dest.writeInt(mOpType);
        dest.writeTypedObject(mTaskFragmentCreationParams, flags);
        dest.writeStrongBinder(mActivityToken);
        dest.writeTypedObject(mActivityIntent, flags);
        dest.writeBundle(mBundle);
        dest.writeStrongBinder(mSecondaryFragmentToken);
        dest.writeTypedObject(mAnimationParams, flags);
        dest.writeBoolean(mBooleanValue);
        dest.writeTypedObject(mSurfaceTransaction, flags);
    }

    @NonNull
    public static final Creator<TaskFragmentOperation> CREATOR =
            new Creator<TaskFragmentOperation>() {
                @Override
                public TaskFragmentOperation createFromParcel(Parcel in) {
                    return new TaskFragmentOperation(in);
                }

                @Override
                public TaskFragmentOperation[] newArray(int size) {
                    return new TaskFragmentOperation[size];
                }
            };

    /**
     * Gets the {@link OperationType} of this {@link TaskFragmentOperation}.
     */
    @OperationType
    public int getOpType() {
        return mOpType;
    }

    /**
     * Gets the options to create a new TaskFragment.
     */
    @Nullable
    public TaskFragmentCreationParams getTaskFragmentCreationParams() {
        return mTaskFragmentCreationParams;
    }

    /**
     * Gets the Activity token set in this operation.
     */
    @Nullable
    public IBinder getActivityToken() {
        return mActivityToken;
    }

    /**
     * Gets the Intent to start a new Activity.
     */
    @Nullable
    public Intent getActivityIntent() {
        return mActivityIntent;
    }

    /**
     * Gets the Bundle set in this operation.
     */
    @Nullable
    public Bundle getBundle() {
        return mBundle;
    }

    /**
     * Gets the fragment token of the secondary TaskFragment set in this operation.
     */
    @Nullable
    public IBinder getSecondaryFragmentToken() {
        return mSecondaryFragmentToken;
    }

    /**
     * Gets the animation related override of TaskFragment.
     */
    @Nullable
    public TaskFragmentAnimationParams getAnimationParams() {
        return mAnimationParams;
    }

    /** Returns the boolean value for this operation. */
    public boolean getBooleanValue() {
        return mBooleanValue;
    }

    /**
     * Returns {@link SurfaceControl.Transaction} associated with this operation. Currently, this is
     * only used by {@link TaskFragmentOperation#OP_TYPE_SET_DECOR_SURFACE_BOOSTED} to specify a
     * {@link SurfaceControl.Transaction} that should be applied together with the transaction to
     * change the decor surface layers.
     */
    @Nullable
    public SurfaceControl.Transaction getSurfaceTransaction() {
        return mSurfaceTransaction;
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("TaskFragmentOperation{ opType=").append(mOpType);
        if (mTaskFragmentCreationParams != null) {
            sb.append(", taskFragmentCreationParams=").append(mTaskFragmentCreationParams);
        }
        if (mActivityToken != null) {
            sb.append(", activityToken=").append(mActivityToken);
        }
        if (mActivityIntent != null) {
            sb.append(", activityIntent=").append(mActivityIntent);
        }
        if (mBundle != null) {
            sb.append(", bundle=").append(mBundle);
        }
        if (mSecondaryFragmentToken != null) {
            sb.append(", secondaryFragmentToken=").append(mSecondaryFragmentToken);
        }
        if (mAnimationParams != null) {
            sb.append(", animationParams=").append(mAnimationParams);
        }
        sb.append(", booleanValue=").append(mBooleanValue);
        if (mSurfaceTransaction != null) {
            sb.append(", surfaceTransaction=").append(mSurfaceTransaction);
        }

        sb.append('}');
        return sb.toString();
    }

    @Override
    public int hashCode() {
        return Objects.hash(mOpType, mTaskFragmentCreationParams, mActivityToken, mActivityIntent,
                mBundle, mSecondaryFragmentToken, mAnimationParams, mBooleanValue,
                mSurfaceTransaction);
    }

    @Override
    public boolean equals(@Nullable Object obj) {
        if (!(obj instanceof TaskFragmentOperation)) {
            return false;
        }
        final TaskFragmentOperation other = (TaskFragmentOperation) obj;
        return mOpType == other.mOpType
                && Objects.equals(mTaskFragmentCreationParams, other.mTaskFragmentCreationParams)
                && Objects.equals(mActivityToken, other.mActivityToken)
                && Objects.equals(mActivityIntent, other.mActivityIntent)
                && Objects.equals(mBundle, other.mBundle)
                && Objects.equals(mSecondaryFragmentToken, other.mSecondaryFragmentToken)
                && Objects.equals(mAnimationParams, other.mAnimationParams)
                && mBooleanValue == other.mBooleanValue
                && Objects.equals(mSurfaceTransaction, other.mSurfaceTransaction);
    }

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

    /** Builder to construct the {@link TaskFragmentOperation}. */
    public static final class Builder {

        @OperationType
        private final int mOpType;

        @Nullable
        private TaskFragmentCreationParams mTaskFragmentCreationParams;

        @Nullable
        private IBinder mActivityToken;

        @Nullable
        private Intent mActivityIntent;

        @Nullable
        private Bundle mBundle;

        @Nullable
        private IBinder mSecondaryFragmentToken;

        @Nullable
        private TaskFragmentAnimationParams mAnimationParams;

        private boolean mBooleanValue;

        @Nullable
        private SurfaceControl.Transaction mSurfaceTransaction;

        /**
         * @param opType the {@link OperationType} of this {@link TaskFragmentOperation}.
         */
        public Builder(@OperationType int opType) {
            mOpType = opType;
        }

        /**
         * Sets the {@link TaskFragmentCreationParams} for creating a new TaskFragment.
         */
        @NonNull
        public Builder setTaskFragmentCreationParams(
                @Nullable TaskFragmentCreationParams taskFragmentCreationParams) {
            mTaskFragmentCreationParams = taskFragmentCreationParams;
            return this;
        }

        /**
         * Sets an Activity token to this operation.
         */
        @NonNull
        public Builder setActivityToken(@Nullable IBinder activityToken) {
            mActivityToken = activityToken;
            return this;
        }

        /**
         * Sets the Intent to start a new Activity.
         */
        @NonNull
        public Builder setActivityIntent(@Nullable Intent activityIntent) {
            mActivityIntent = activityIntent;
            return this;
        }

        /**
         * Sets a Bundle to this operation.
         */
        @NonNull
        public Builder setBundle(@Nullable Bundle bundle) {
            mBundle = bundle;
            return this;
        }

        /**
         * Sets the secondary fragment token to this operation.
         */
        @NonNull
        public Builder setSecondaryFragmentToken(@Nullable IBinder secondaryFragmentToken) {
            mSecondaryFragmentToken = secondaryFragmentToken;
            return this;
        }

        /**
         * Sets the {@link TaskFragmentAnimationParams} for the given TaskFragment.
         */
        @NonNull
        public Builder setAnimationParams(@Nullable TaskFragmentAnimationParams animationParams) {
            mAnimationParams = animationParams;
            return this;
        }

        /**
         * Sets the boolean value for this operation.
         */
        @NonNull
        public Builder setBooleanValue(boolean booleanValue) {
            mBooleanValue = booleanValue;
            return this;
        }

        /**
         * Sets {@link SurfaceControl.Transaction} associated with this operation. Currently, this
         * is only used by {@link TaskFragmentOperation#OP_TYPE_SET_DECOR_SURFACE_BOOSTED} to
         * specify a {@link SurfaceControl.Transaction} that should be applied together with the
         * transaction to change the decor surface layers.
         */
        @NonNull
        public Builder setSurfaceTransaction(
                @Nullable SurfaceControl.Transaction surfaceTransaction) {
            mSurfaceTransaction = surfaceTransaction;
            return this;
        }

        /**
         * Constructs the {@link TaskFragmentOperation}.
         */
        @NonNull
        public TaskFragmentOperation build() {
            return new TaskFragmentOperation(mOpType, mTaskFragmentCreationParams, mActivityToken,
                    mActivityIntent, mBundle, mSecondaryFragmentToken, mAnimationParams,
                    mBooleanValue, mSurfaceTransaction);
        }
    }
}