Initial creation of drag zones for bubble anything

/*

 * Copyright (C) 2025 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.shared.bubbles

import android.graphics.Rect

/**

 * Represents an invisible area on the screen that determines what happens to a dragged object if it

 * is released in that area.

 *

 * [bounds] are the bounds of the drag zone. Drag zones have an associated drop target that serves

 * as visual feedback hinting what would happen if the object is released. When a dragged object is

 * dragged into a drag zone, the associated drop target will be displayed. Not all drag zones have

 * drop targets; only those that are made visible by Bubbles do.

 */

sealed interface DragZone {

    /** The bounds of this drag zone. */

    val bounds: Rect

    fun contains(x: Int, y: Int) = bounds.contains(x, y)

    /** Represents the bubble drag area on the screen. */

    sealed class Bubble(override val bounds: Rect) : DragZone {

        data class Left(override val bounds: Rect, val dropTarget: Rect) : Bubble(bounds)

        data class Right(override val bounds: Rect, val dropTarget: Rect) : Bubble(bounds)

    }

    /** Represents dragging to Desktop Window. */

    data class DesktopWindow(override val bounds: Rect, val dropTarget: Rect) : DragZone

    /** Represents dragging to Full Screen. */

    data class FullScreen(override val bounds: Rect, val dropTarget: Rect) : DragZone

    /** Represents dragging to dismiss. */

    data class Dismiss(override val bounds: Rect) : DragZone

    /** Represents dragging to enter Split or replace a Split app. */

    sealed class Split(override val bounds: Rect) : DragZone {

        data class Left(override val bounds: Rect) : Split(bounds)

        data class Right(override val bounds: Rect) : Split(bounds)

        data class Top(override val bounds: Rect) : Split(bounds)

        data class Bottom(override val bounds: Rect) : Split(bounds)

    }

}

/*

 * Copyright (C) 2025 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.shared.bubbles

/** A Bubble object being dragged. */

sealed interface DraggedObject {

    /** The initial location of the object at the start of the drag gesture. */

    val initialLocation: BubbleBarLocation

    data class Bubble(override val initialLocation: BubbleBarLocation) : DraggedObject

    data class BubbleBar(override val initialLocation: BubbleBarLocation) : DraggedObject

    data class ExpandedView(override val initialLocation: BubbleBarLocation) : DraggedObject

}