mirror of
https://github.com/phranck/TUIkit.git
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phranck
e214215610
- Migrate 20 Equatable conformances across 17 files from nonisolated + MainActor.assumeIsolated to @preconcurrency Equatable (SE-0423) - Remove unnecessary import Foundation from 29 source files - Extract TextFieldHandler clipboard ops into TextFieldHandler+Clipboard.swift - Extract RenderContext into RenderContext.swift (Renderable.swift 553 -> 279 lines) - Extract ANSIColor enum into ANSIColor.swift (Color.swift 600 -> 533 lines) - Add deprecation timeline note for progressBarStyle(_:) - Migrate test usages from progressBarStyle to trackStyle
85 lines
2.7 KiB
Swift
85 lines
2.7 KiB
Swift
// 🖥️ TUIKit — Terminal UI Kit for Swift
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// OverlayModifier.swift
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//
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// Created by LAYERED.work
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// License: MIT
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/// Internal modifier that layers an overlay view on top of the base content.
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///
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/// The overlay is rendered on top of the base content. Both views are rendered
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/// to their natural size, and the overlay is positioned according to the
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/// specified alignment within the base content's bounds.
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public struct OverlayModifier<Base: View, Overlay: View>: View {
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/// The base content.
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let base: Base
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/// The overlay content.
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let overlay: Overlay
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/// The alignment of the overlay within the base bounds.
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let alignment: Alignment
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public var body: Never {
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fatalError("OverlayModifier renders via Renderable")
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}
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}
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// MARK: - Equatable Conformance
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extension OverlayModifier: @preconcurrency Equatable where Base: Equatable, Overlay: Equatable {
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public static func == (lhs: OverlayModifier<Base, Overlay>, rhs: OverlayModifier<Base, Overlay>) -> Bool {
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lhs.base == rhs.base &&
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lhs.overlay == rhs.overlay &&
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lhs.alignment == rhs.alignment
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}
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}
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// MARK: - Renderable
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extension OverlayModifier: Renderable {
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func renderToBuffer(context: RenderContext) -> FrameBuffer {
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// Render both contents
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let baseBuffer = TUIkit.renderToBuffer(base, context: context)
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let overlayBuffer = TUIkit.renderToBuffer(overlay, context: context)
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guard !baseBuffer.isEmpty else {
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return overlayBuffer
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}
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guard !overlayBuffer.isEmpty else {
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return baseBuffer
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}
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// Calculate the position of the overlay based on alignment
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let baseWidth = baseBuffer.width
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let baseHeight = baseBuffer.height
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let overlayWidth = overlayBuffer.width
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let overlayHeight = overlayBuffer.height
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// Calculate horizontal position
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let horizontalOffset: Int
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switch alignment.horizontal {
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case .leading:
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horizontalOffset = 0
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case .center:
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horizontalOffset = max(0, (baseWidth - overlayWidth) / 2)
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case .trailing:
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horizontalOffset = max(0, baseWidth - overlayWidth)
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}
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// Calculate vertical position
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let verticalOffset: Int
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switch alignment.vertical {
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case .top:
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verticalOffset = 0
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case .center:
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verticalOffset = max(0, (baseHeight - overlayHeight) / 2)
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case .bottom:
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verticalOffset = max(0, baseHeight - overlayHeight)
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}
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// Composite the overlay onto the base
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return baseBuffer.composited(with: overlayBuffer, at: (x: horizontalOffset, y: verticalOffset))
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}
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}
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