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Expand iOS sample app #31

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Nov 18, 2023
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Expand iOS sample app #31

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22 changes: 16 additions & 6 deletions Projects/NeonExample-iOS/ViewController.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -15,16 +15,22 @@ final class ViewController: UIViewController {
.appendingPathComponent("queries/highlights.scm")
let query = try! language.query(contentsOf: url!)

let attrProvider: TextViewSystemInterface.AttributeProvider = { token in
guard token.name.hasPrefix("keyword") else { return [:] }

return [.foregroundColor: UIColor.red]
let regularFont = UIFont.monospacedSystemFont(ofSize: 16, weight: .regular)
let boldFont = UIFont.monospacedSystemFont(ofSize: 16, weight: .bold)
let italicFont = regularFont.fontDescriptor.withSymbolicTraits(.traitItalic).map { UIFont(descriptor: $0, size: 16) } ?? regularFont

let provider: TextViewSystemInterface.AttributeProvider = { token in
return switch token.name {
case let keyword where keyword.hasPrefix("keyword"): [.foregroundColor: UIColor.red, .font: boldFont]
case "comment": [.foregroundColor: UIColor.green, .font: italicFont]
default: [.foregroundColor: UIColor.darkText, .font: regularFont]
}
}

return try! TextViewHighlighter(textView: textView,
language: language,
highlightQuery: query,
attributeProvider: attrProvider)
attributeProvider: provider)
}()

override func viewDidLoad() {
Expand All @@ -33,7 +39,11 @@ final class ViewController: UIViewController {
_ = highlighter.textView
_ = textView.layoutManager

textView.text = "var something = String()"
textView.text = """
// Example Code!
let value = "hello world"
print(value)
"""

self.view.addSubview(textView)
textView.translatesAutoresizingMaskIntoConstraints = false
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