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53 lines
1.8 KiB
53 lines
1.8 KiB
/* |
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* Copyright (c) 2023 New Vector Ltd |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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package io.element.android.libraries.architecture.overlay.operation |
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import com.bumble.appyx.navmodel.backstack.BackStack |
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import com.bumble.appyx.navmodel.backstack.BackStackElements |
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import com.bumble.appyx.navmodel.backstack.activeIndex |
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import io.element.android.libraries.architecture.overlay.Overlay |
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import kotlinx.parcelize.Parcelize |
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@Parcelize |
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class Hide<T : Any> : OverlayOperation<T> { |
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override fun isApplicable(elements: BackStackElements<T>): Boolean = |
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elements.any { it.targetState == BackStack.State.ACTIVE } |
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override fun invoke( |
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elements: BackStackElements<T> |
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): BackStackElements<T> { |
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val hideIndex = elements.activeIndex |
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require(hideIndex != -1) { "Nothing to hide, state=$elements" } |
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return elements.mapIndexed { index, element -> |
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when (index) { |
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hideIndex -> element.transitionTo( |
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newTargetState = BackStack.State.DESTROYED, |
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operation = this |
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) |
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else -> element |
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} |
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} |
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} |
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override fun equals(other: Any?): Boolean = this.javaClass == other?.javaClass |
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override fun hashCode(): Int = this.javaClass.hashCode() |
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} |
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fun <T : Any> Overlay<T>.hide() { |
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accept(Hide()) |
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}
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