80 lines
2.3 KiB
Swift
80 lines
2.3 KiB
Swift
//
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// Button.swift
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// TermKitBackend
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//
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// Created by david-swift on 01.07.2024.
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//
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import TermKit
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/// A simple button widget.
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public struct Button: TermKitWidget, ButtonWidget, MenuWidget {
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/// The button's label.
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var label: String
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/// The action.
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var action: () -> Void
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/// The identifier for the action closure.
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let actionID = "action"
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/// Initialize a button.
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/// - Parameters:
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/// - The button's label.
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/// - The action.
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public init(_ label: String, action: @escaping () -> Void) {
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self.label = label
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self.action = action
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}
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/// The view storage.
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/// - Parameters:
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/// - modifiers: Modify views before being updated.
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/// - type: The type of the app storage.
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/// - Returns: The view storage.
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public 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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if type == MenuContext.self {
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let storage = ViewStorage(nil)
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let menuItem = MenuItem(title: label) {
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(storage.fields[actionID] as? () -> Void)?()
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}
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storage.pointer = menuItem
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storage.fields[actionID] = action
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return storage
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} else if type == ButtonContext.self {
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return ViewStorage(self)
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}
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let button = TermKit.Button(label, clicked: action)
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return .init(button, state: self)
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}
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/// Update the stored content.
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/// - Parameters:
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/// - storage: The storage to update.
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/// - modifiers: Modify views before being updated
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/// - updateProperties: Whether to update the view's properties.
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/// - type: The type of the app storage.
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public 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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if type == MenuContext.self {
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storage.fields[actionID] = action
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}
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guard let pointer = storage.pointer as? TermKit.Button else {
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return
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}
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pointer.clicked = { _ in action() }
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if updateProperties, (storage.previousState as? Self)?.label != label {
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pointer.text = label
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storage.previousState = self
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}
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}
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}
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