48 lines
1.4 KiB
Swift
48 lines
1.4 KiB
Swift
// Copyright 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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// FIXME: these should have standalone implementations
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public extension View {
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@_spi(TokamakCore)
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func _onMount(perform action: (() -> ())? = nil) -> some View {
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modifier(_AppearanceActionModifier(appear: action))
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}
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@_spi(TokamakCore)
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func _onUpdate(perform action: (() -> ())? = nil) -> some View {
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modifier(_LifecycleActionModifier(update: action))
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}
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@_spi(TokamakCore)
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func _onUnmount(perform action: (() -> ())? = nil) -> some View {
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modifier(_AppearanceActionModifier(disappear: action))
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}
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}
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protocol LifecycleActionType {
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var update: (() -> ())? { get }
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}
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struct _LifecycleActionModifier: ViewModifier {
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var update: (() -> ())?
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typealias Body = Never
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}
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extension ModifiedContent: LifecycleActionType
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where Content: View, Modifier == _LifecycleActionModifier
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{
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var update: (() -> ())? { modifier.update }
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}
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