79 lines
2.4 KiB
Swift
79 lines
2.4 KiB
Swift
//
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// StateWrapper.swift
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// Meta
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//
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// Created by david-swift on 09.06.24.
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//
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/// A storage for `@State` properties.
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struct StateWrapper: ConvenienceWidget {
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/// The content.
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var content: () -> Body
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/// The state information (from properties with the `State` wrapper).
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var state: [String: StateProtocol] = [:]
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/// Initialize a `StateWrapper`.
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/// - Parameter content: The view content.
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init(@ViewBuilder content: @escaping () -> Body) {
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self.content = content
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}
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/// Initialize a `StateWrapper`.
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/// - Parameters:
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/// - content: The view content.
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/// - state: The state information.
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init(content: @escaping () -> Body, state: [String: StateProtocol]) {
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self.content = content
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self.state = state
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}
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/// Update a view storage.
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/// - Parameters:
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/// - storage: The view storage.
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/// - data: Modify views before being updated.
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/// - updateProperties: Whether to update properties.
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/// - type: The view render data type.
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/// - Returns: The view storage.
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func update<Data>(
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_ storage: ViewStorage,
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data: WidgetData,
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updateProperties: Bool,
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type: Data.Type
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) where Data: ViewRenderData {
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var updateProperties = updateProperties
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for property in state {
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if let storage = storage.state[property.key]?.content.storage {
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property.value.content.storage = storage
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}
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if property.value.content.update {
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updateProperties = true
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property.value.content.update = false
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}
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}
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guard let storage = storage.content[.mainContent]?.first else {
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return
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}
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content().updateStorage(storage, data: data, updateProperties: updateProperties, type: type)
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}
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/// Get a view storage.
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/// - Parameters:
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/// - data: Modify views before being updated.
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/// - type: The view render data type.
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/// - Returns: The view storage.
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func container<Data>(
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data: WidgetData,
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type: Data.Type
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) -> ViewStorage where Data: ViewRenderData {
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let content = content().storage(data: data, type: type)
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let storage = ViewStorage(content.pointer, content: [.mainContent: [content]])
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storage.state = state
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for element in state {
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element.value.setup()
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}
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return storage
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}
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}
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