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Improvements to text wrapping, documentation
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| // | ||
| // NSTextView+Behavior.swift | ||
| // TextViewPlus | ||
| // | ||
| // Created by Matt Massicotte on 2020-05-06. | ||
| // Copyright © 2020 Chime Systems Inc. All rights reserved. | ||
| // | ||
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| import Cocoa | ||
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| extension NSTextView { | ||
| private var maximumUsableWidth: CGFloat { | ||
| guard let scrollView = enclosingScrollView else { | ||
| return bounds.width | ||
| } | ||
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| let usableWidth = scrollView.contentSize.width - textContainerInset.width | ||
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| guard scrollView.rulersVisible, let rulerView = scrollView.verticalRulerView else { | ||
| return usableWidth | ||
| } | ||
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| return usableWidth - rulerView.requiredThickness | ||
| } | ||
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| // swiftlint:disable line_length | ||
| /// Controls the relative sizing behavior of the NSTextView and its NSTextContainer | ||
| /// | ||
| /// NSTextView scrolling behavior is tricky. Correct configuration of the enclosing | ||
| /// NSScrollView is required as well. But, this method does the basic setup, | ||
| /// as well as adjusting frame positions to account for any NSScrollView rulers. | ||
| /// | ||
| /// Check out: https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/TextUILayer/Tasks/TextInScrollView.html | ||
| public var wrapsTextToHorizontalBounds: Bool { | ||
| get { | ||
| guard let container = textContainer else { | ||
| return false | ||
| } | ||
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| return container.widthTracksTextView | ||
| } | ||
| set { | ||
| textContainer?.widthTracksTextView = newValue | ||
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| let max = CGFloat.greatestFiniteMagnitude | ||
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| textContainer?.size = NSSize(width: max, height: max) | ||
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| // if we are turning on wrapping, our view could be the wrong size, | ||
| // so need to adjust it. Also, the textContainer's width could have | ||
| // been set to large, but adjusting the frame will fix that | ||
| // automatically | ||
| if newValue { | ||
| let newSize = NSSize(width: maximumUsableWidth, height: frame.height) | ||
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| self.frame = NSRect(origin: frame.origin, size: newSize) | ||
| } | ||
| } | ||
| } | ||
| // swiftlint:enable line_length | ||
| } |
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