82 lines
2.1 KiB
Swift
82 lines
2.1 KiB
Swift
//
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// View.swift
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// Adwaita
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//
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// Created by david-swift on 05.08.23.
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//
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import Libadwaita
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/// A structure conforming to `View` is referred to as a view.
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/// It can be part of a body.
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///
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/// ```swift
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/// struct Test: View {
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///
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/// var view: Body {
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/// AnotherView()
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/// }
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///
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/// }
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/// ```
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///
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public protocol View {
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/// The view's content.
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@ViewBuilder var view: Body { get }
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}
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extension View {
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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: [(View) -> View]) -> 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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} else {
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var state: [String: StateProtocol] = [:]
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for property in Mirror(reflecting: self).children {
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if let label = property.label, let value = property.value as? StateProtocol {
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state[label] = value
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}
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}
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return StateWrapper(content: { view }, state: state)
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}
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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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func updateStorage(_ storage: ViewStorage, modifiers: [(View) -> View]) {
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let modified = getModified(modifiers: modifiers)
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if let widget = modified as? Widget {
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widget.update(storage, modifiers: modifiers)
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} else {
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StateWrapper { self }.update(storage, modifiers: modifiers)
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}
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}
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/// Get a storage.
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/// - Parameter modifiers: Modify views before being updated.
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/// - Returns: The storage.
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public func storage(modifiers: [(View) -> View]) -> ViewStorage {
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widget(modifiers: modifiers).container(modifiers: modifiers)
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}
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func getModified(modifiers: [(View) -> View]) -> View {
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var modified: View = 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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}
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/// `Body` is an array of views.
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public typealias Body = [View]
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