TextKit 2 - Implement basic TK2 class and graceful fallback to TK1 #1690
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,95 @@ | ||
| // | ||
| // SPTextView.swift | ||
| // Simplenote | ||
| // | ||
| // Created by Charlie Scheer on 12/19/24. | ||
| // Copyright © 2024 Automattic. All rights reserved. | ||
| // | ||
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| extension SPTextView { | ||
| @objc | ||
| func setupTextContainer(with textStorage: SPInteractiveTextStorage) -> NSTextContainer { | ||
| let container = NSTextContainer(size: .zero) | ||
| container.widthTracksTextView = true | ||
| container.heightTracksTextView = true | ||
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| if #available(iOS 16.0, *) { | ||
| let textLayoutManager = NSTextLayoutManager() | ||
| let contentStorage = NSTextContentStorage() | ||
| contentStorage.delegate = self | ||
| contentStorage.addTextLayoutManager(textLayoutManager) | ||
| textLayoutManager.textContainer = container | ||
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| } else { | ||
| let layoutManager = NSLayoutManager() | ||
| layoutManager.addTextContainer(container) | ||
| textStorage.addLayoutManager(layoutManager) | ||
| } | ||
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| return container | ||
| } | ||
| } | ||
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| // MARK: NSTextContentStorageDelegate | ||
| // | ||
| extension SPTextView: NSTextContentStorageDelegate { | ||
| public func textContentStorage(_ textContentStorage: NSTextContentStorage, textParagraphWith range: NSRange) -> NSTextParagraph? { | ||
| guard let originalText = textContentStorage.textStorage?.attributedSubstring(from: range) as? NSMutableAttributedString else { | ||
|
There was a problem hiding this comment. Missing |
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| return nil | ||
| } | ||
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| let style = textInRangeIsHeader(range) ? headlineStyle : defaultStyle | ||
| originalText.addAttributes(style, range: originalText.fullRange) | ||
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| return NSTextParagraph(attributedString: originalText) | ||
| } | ||
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| func textInRangeIsHeader(_ range: NSRange) -> Bool { | ||
| range.location == .zero | ||
| } | ||
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| // MARK: Styles | ||
| // | ||
| var headlineFont: UIFont { | ||
| UIFont.preferredFont(for: .title1, weight: .bold) | ||
| } | ||
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| var defaultFont: UIFont { | ||
| UIFont.preferredFont(forTextStyle: .body) | ||
| } | ||
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| var defaultTextColor: UIColor { | ||
| UIColor.simplenoteNoteHeadlineColor | ||
| } | ||
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| var lineSpacing: CGFloat { | ||
| defaultFont.lineHeight * Metrics.lineSpacingMultipler | ||
| } | ||
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| var defaultStyle: [NSAttributedString.Key: Any] { | ||
| [ | ||
| .font: defaultFont, | ||
| .foregroundColor: defaultTextColor, | ||
| .paragraphStyle: NSMutableParagraphStyle(lineSpacing: lineSpacing) | ||
| ] | ||
| } | ||
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| var headlineStyle: [NSAttributedString.Key: Any] { | ||
| [ | ||
| .font: headlineFont, | ||
| .foregroundColor: defaultTextColor, | ||
| ] | ||
| } | ||
| } | ||
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| // MARK: - Metrics | ||
| // | ||
| private enum Metrics { | ||
| static let lineSpacingMultiplerPad: CGFloat = 0.40 | ||
| static let lineSpacingMultiplerPhone: CGFloat = 0.20 | ||
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| static var lineSpacingMultipler: CGFloat { | ||
| UIDevice.isPad ? lineSpacingMultiplerPad : lineSpacingMultiplerPhone | ||
| } | ||
| } | ||
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Quick note:
layoutManagermay not be init'ed by the time it's called here