112 lines
3.7 KiB
Swift
112 lines
3.7 KiB
Swift
//
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// AnyView.swift
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// Meta
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//
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// Created by david-swift on 26.05.24.
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//
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/// The view type used for any form of a view.
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public protocol AnyView {
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/// The view's content.
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@ViewBuilder var viewContent: Body { get }
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}
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extension AnyView {
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/// Get the view's debug tree.
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/// - Parameters:
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/// - parameters: Whether the widget parameters should be included in the debug tree.
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/// - type: The widget type.
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/// - modifiers: Modify the view before getting the debug tree.
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/// - Returns: A textual description.
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public func getDebugTree<WidgetType>(
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parameters: Bool,
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type: WidgetType.Type,
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modifiers: [(AnyView) -> AnyView] = []
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) -> String {
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let oldValue = StateManager.saveState
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StateManager.saveState = false
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defer {
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StateManager.saveState = oldValue
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}
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if let body = getModified(modifiers: modifiers) as? Body {
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return body.getBodyDebugTree(parameters: parameters, type: type, modifiers: modifiers)
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} else if let widget = getModified(modifiers: modifiers) as? Widget {
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return widget.getViewDescription(parameters: parameters, type: type, modifiers: modifiers)
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}
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let string = """
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\(Self.self) {
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\(indented: viewContent
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.map { view in
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view.getModified(modifiers: modifiers)
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}
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.getBodyDebugTree(parameters: parameters, type: type, modifiers: modifiers))
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}
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"""
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return string
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}
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func getModified(modifiers: [(AnyView) -> AnyView]) -> AnyView {
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var modified: AnyView = self
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for modifier in modifiers {
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modified = modifier(modified)
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}
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return modified
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}
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/// Update a storage to a view.
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/// - Parameters:
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/// - storage: The storage.
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/// - modifiers: Modify views before being updated.
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/// - updateProperties: Whether to update properties.
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/// - type: The type of the widgets.
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public func updateStorage<WidgetType>(
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_ storage: ViewStorage,
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modifiers: [(AnyView) -> AnyView],
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updateProperties: Bool,
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type: WidgetType.Type
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) {
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widget(modifiers: modifiers)
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.update(storage, modifiers: modifiers, updateProperties: updateProperties, type: type)
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}
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/// Get a storage.
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/// - Parameters:
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/// - modifiers: Modify views before being updated.
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/// - type: The widget types.
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/// - Returns: The storage.
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public func storage<WidgetType>(modifiers: [(AnyView) -> AnyView], type: WidgetType.Type) -> ViewStorage {
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widget(modifiers: modifiers).container(modifiers: modifiers, type: type)
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}
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/// Wrap the view into a widget.
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/// - Parameter modifiers: Modify views before being updated.
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/// - Returns: The widget.
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public func widget(modifiers: [(AnyView) -> AnyView]) -> Widget {
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let modified = getModified(modifiers: modifiers)
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if let peer = modified as? Widget {
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return peer
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}
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if let array = modified as? Body {
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return Wrapper { array }
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}
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return Wrapper { viewContent.map { $0.getModified(modifiers: modifiers) } }
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}
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/// Whether the view can be rendered in a certain environment.
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func renderable<WidgetType>(type: WidgetType.Type, modifiers: [(AnyView) -> AnyView]) -> Bool {
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let result = getModified(modifiers: modifiers)
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return result as? WidgetType != nil
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|| result as? SimpleView != nil
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|| result as? View != nil
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|| result as? ConvenienceWidget != nil
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|| result as? Body != nil
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}
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}
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/// `Body` is an array of views.
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public typealias Body = [AnyView]
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