OwnerScope.kt

/*
 * Copyright 2020 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 androidx.compose.ui.node

/**
 * Read observation scopes used in layout and drawing must implement this interface to let the
 * snapshot observer know when the scope has been removed and should no longer be observed.
 *
 * @see Owner.observeReads
 */
internal interface OwnerScope {
    /**
     * `true` when the scope is still in the hierarchy and `false` once it has been removed and
     * observations are no longer necessary.
     */
    val isValid: Boolean
}