| /* |
| * Copyright 2019 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 |
| |
| /** |
| * A [CompositionReference] is an opaque type that is used to logically "link" two compositions |
| * together. The [CompositionReference] instance represents a reference to the "parent" composition |
| * in a specific position of that composition's tree, and the instance can then be given to a new |
| * "child" composition. This reference ensures that invalidations and ambients flow logically |
| * through the two compositions as if they were not separate. |
| * |
| * @see compositionReference |
| */ |
| abstract class CompositionReference internal constructor() { |
| internal abstract val compoundHashKey: Int |
| internal abstract val collectingKeySources: Boolean |
| internal abstract fun recordInspectionTable(table: MutableSet<SlotTable>) |
| internal abstract fun <T> getAmbient(key: Ambient<T>): T |
| internal abstract fun invalidate() |
| internal abstract fun <N> registerComposer(composer: Composer<N>) |
| internal abstract fun unregisterComposer(composer: Composer<*>) |
| internal abstract fun getAmbientScope(): AmbientMap |
| } |