| /* |
| * 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.ui.core.selection |
| |
| import androidx.compose.ambientOf |
| |
| /** |
| * An interface allowing a composable to subscribe and unsubscribe to selection changes. |
| */ |
| interface SelectionRegistrar { |
| /** |
| * Subscribe to SelectionContainer selection changes. |
| */ |
| fun subscribe(selectable: Selectable): Selectable |
| |
| /** |
| * Unsubscribe from SelectionContainer selection changes. |
| */ |
| fun unsubscribe(selectable: Selectable) |
| |
| /** |
| * When the Global Position of a subscribed [Selectable] changes, this method |
| * is called. |
| */ |
| fun onPositionChange() |
| } |
| |
| /** |
| * Ambient of SelectionRegistrar. Composables that implement selection logic can use this ambient |
| * to get a [SelectionRegistrar] in order to subscribe and unsubscribe to [SelectionRegistrar]. |
| */ |
| val SelectionRegistrarAmbient = ambientOf<SelectionRegistrar?>() |