67 lines
2.0 KiB
Swift
67 lines
2.0 KiB
Swift
import SwiftUI
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import AppKit
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import VorleserKit
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struct MacReadingTextView: NSViewRepresentable {
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let text: String
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let highlightedRange: Range<Int>?
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let onClickCharacter: (CharacterOffset) -> Void
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func makeNSView(context: Context) -> NSScrollView {
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let scrollView = NSTextView.scrollableTextView()
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let textView = scrollView.documentView as! NSTextView
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textView.isEditable = false
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textView.isSelectable = false
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textView.font = .preferredFont(forTextStyle: .body)
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textView.textContainerInset = NSSize(width: 16, height: 16)
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let click = NSClickGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleClick(_:)))
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textView.addGestureRecognizer(click)
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context.coordinator.textView = textView
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return scrollView
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}
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func updateNSView(_ scrollView: NSScrollView, context: Context) {
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let textView = scrollView.documentView as! NSTextView
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let attributed = NSMutableAttributedString(
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string: text,
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attributes: [
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.font: NSFont.preferredFont(forTextStyle: .body),
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.foregroundColor: NSColor.textColor,
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]
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)
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if let range = highlightedRange,
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range.lowerBound >= 0,
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range.upperBound <= text.count {
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let nsRange = NSRange(location: range.lowerBound, length: range.upperBound - range.lowerBound)
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attributed.addAttribute(.backgroundColor, value: NSColor.systemYellow.withAlphaComponent(0.3), range: nsRange)
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}
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textView.textStorage?.setAttributedString(attributed)
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}
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func makeCoordinator() -> Coordinator {
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Coordinator(onClickCharacter: onClickCharacter)
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}
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class Coordinator: NSObject {
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weak var textView: NSTextView?
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let onClickCharacter: (CharacterOffset) -> Void
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init(onClickCharacter: @escaping (CharacterOffset) -> Void) {
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self.onClickCharacter = onClickCharacter
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}
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@objc func handleClick(_ gesture: NSClickGestureRecognizer) {
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guard let textView else { return }
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let point = gesture.location(in: textView)
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let characterIndex = textView.characterIndexForInsertion(at: point)
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if characterIndex < textView.string.count {
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onClickCharacter(characterIndex)
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}
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}
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}
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}
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