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import SwiftUI
struct BetterTextEditor: NSViewRepresentable {
@Environment(\.lineSpacing) private var lineSpacing
@Binding private var text: String
private var customizations: [(NSTextView) -> Void] = []
init(text: Binding<String>) {
self._text = text
}
func makeCoordinator() -> Coordinator {
Coordinator(self)
}
func makeNSView(context: Context) -> NSScrollView {
let scrollview = NSTextView.scrollablePlainDocumentContentTextView()
let textview = scrollview.documentView as! NSTextView
textview.string = self.text
textview.delegate = context.coordinator
// let p = NSMutableParagraphStyle()
// p.lineSpacing = self.lineSpacing
//// textview.defaultParagraphStyle = p
// textview.typingAttributes = [
// .paragraphStyle: p
// ]
textview.isEditable = true
textview.isRichText = false
textview.allowsUndo = true
textview.isFieldEditor = false
textview.usesAdaptiveColorMappingForDarkAppearance = true
textview.drawsBackground = false // true
textview.usesRuler = false
textview.usesFindBar = false
textview.isIncrementalSearchingEnabled = false
textview.isAutomaticQuoteSubstitutionEnabled = false
textview.isAutomaticDashSubstitutionEnabled = false
textview.isAutomaticSpellingCorrectionEnabled = true
textview.isAutomaticDataDetectionEnabled = false
textview.isAutomaticLinkDetectionEnabled = false
textview.usesInspectorBar = false
textview.usesFontPanel = false
textview.importsGraphics = false
textview.allowsImageEditing = false
textview.displaysLinkToolTips = true
textview.backgroundColor = NSColor.textBackgroundColor
textview.textContainerInset = NSSize(width: 16, height: 16)
textview.isContinuousSpellCheckingEnabled = true
textview.setSelectedRange(NSMakeRange(0, 0))
self.customizations.forEach { $0(textview) }
scrollview.scrollerStyle = .overlay
return scrollview
}
func updateNSView(_ nsView: NSScrollView, context: Context) {
let textview = nsView.documentView as! NSTextView
if textview.string != text {
textview.string = text
}
self.customizations.forEach { $0(textview) }
}
func betterEditorFont(_ font: NSFont) -> Self {
self.customized { $0.font = font }
}
func betterEditorParagraphStyle(_ paragraphStyle: NSParagraphStyle) -> Self {
self.customized { $0.defaultParagraphStyle = paragraphStyle }
}
func betterEditorAutomaticDashSubstitution(_ enabled: Bool) -> Self {
self.customized { $0.isAutomaticDashSubstitutionEnabled = enabled }
}
func betterEditorAutomaticQuoteSubstitution(_ enabled: Bool) -> Self {
self.customized { $0.isAutomaticQuoteSubstitutionEnabled = enabled }
}
func betterEditorAutomaticSpellingCorrection(_ enabled: Bool) -> Self {
self.customized { $0.isAutomaticSpellingCorrectionEnabled = enabled }
}
func betterEditorTextInset(_ size: NSSize) -> Self {
self.customized { $0.textContainerInset = size }
}
class Coordinator: NSObject, NSTextViewDelegate {
var parent: BetterTextEditor
init(_ parent: BetterTextEditor) {
self.parent = parent
}
func textDidChange(_ notification: Notification) {
guard let textview = notification.object as? NSTextView else {
return
}
self.parent.text = textview.string
}
}
}
extension BetterTextEditor {
private func customized(_ customization: @escaping (NSTextView) -> Void) -> Self {
var copy = self
copy.customizations.append(customization)
return copy
}
}
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