71 lines
2.4 KiB
Swift
71 lines
2.4 KiB
Swift
// Copyright 2018-2020 Tokamak contributors
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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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// Created by Max Desiatov on 03/12/2018.
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//
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import CombineShim
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import Runtime
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final class MountedCompositeView<R: Renderer>: MountedCompositeElement<R> {
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override func mount(with reconciler: StackReconciler<R>) {
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let childBody = reconciler.render(compositeView: self)
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if let appearanceAction = view.view as? AppearanceActionType {
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appearanceAction.appear?()
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}
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let child: MountedElement<R> = childBody.makeMountedView(parentTarget, environmentValues)
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mountedChildren = [child]
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child.mount(with: reconciler)
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// `_TargetRef` is a composite view, so it's enough to check for it only here
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if var targetRef = view.view as? TargetRefType {
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// `_TargetRef` body is not always a host view that has a target, need to traverse
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// all descendants to find a `MountedHostView<R>` instance.
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var descendant: MountedElement<R>? = child
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while descendant != nil && !(descendant is MountedHostView<R>) {
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descendant = descendant?.mountedChildren.first
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}
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guard let hostDescendant = descendant as? MountedHostView<R> else { return }
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targetRef.target = hostDescendant.target
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view.view = targetRef
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}
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}
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override func unmount(with reconciler: StackReconciler<R>) {
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mountedChildren.forEach { $0.unmount(with: reconciler) }
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if let appearanceAction = view.view as? AppearanceActionType {
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appearanceAction.disappear?()
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}
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}
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override func update(with reconciler: StackReconciler<R>) {
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let element = reconciler.render(compositeView: self)
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reconciler.reconcile(
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self,
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with: element,
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getElementType: { $0.type },
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updateChild: {
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$0.environmentValues = environmentValues
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$0.view = AnyView(element)
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},
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mountChild: { $0.makeMountedView(parentTarget, environmentValues) }
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)
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}
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}
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