TextViewPlus

This project aims to make it easier to use NSTextView. It was originally built to support TextKit 1. But, now a major goal is to support TextKit 2.

Integration

dependencies: [
    .package(url: "https://github.com/ChimeHQ/TextViewPlus")
],
targets: [
    .target(
        name: "UseCoreFunctionality",
        dependencies: ["TextViewPlus"]
    ),
    .target(
        name: "UseBaseTextView",
        dependencies: [.product(name: "BaseTextView", package: "TextViewPlus")]
    ),
]

BaseTextView

This is an TextKit 2-only NSTextView subclass that aims for an absolute minimal amount of changes. Things are allowed only if they are required for correct functionality. It is intended to be a drop-in replacement for NSTextView, and should maintain compatibilty with existing subclasses. Behaviors are appropriate for all types of text.

• Disables all support for TextKit 1
• Workaround for scrollRangeToVisible bug (FB13100459)
• Minimum textContainerInset enforcement to address more scrollRangeToVisible bugs
• Additional routing to NSTextViewDelegate.textView(_:, doCommandBy:) -> Bool: paste, pasteAsRichText, pasteAsPlainText
• Hooks for onKeyDown, onFlagsChanged, onMouseDown
• Configurable selection notifcation delivery via continuousSelectionNotifications

NSTextView Extensions

Ranges

Handy methods for computing ranges of text within the view.

func textRange(for rect: NSRect) -> NSRange
var visibleTextRange: NSRange

Selection

Convenience methods for computing selection ranges/locations.

var selectedTextRanges: [NSRange]
var selectedContinuousRange: NSRange?
var insertionLocation: Int?

Style

Styling changes can be very expensive, this method is much faster in certain common cases.

func updateFont(_ newFont: NSFont, color newColor: NSColor)

Bounding

Computing bounding rectangles of displayed text.

func boundingRect(for range: NSRange) -> NSRect?
func boundingRect(forGlyphRange range: NSRange) -> NSRect?
func boundingSelectionRects(forRange range: NSRange) -> [NSRect]

Attributed Strings

Programmatic modification of the underlying attributed string in the NSTextStorage, with support for delegate callbacks and undo.

func replaceCharacters(in range: NSRange, with attributedString: NSAttributedString)

// with undo supported
func replaceString(in range: NSRange, with attributedString: NSAttributedString)

Behavior

Changing NSTextView behaviors can be tricky, and often involve complex interactions with the whole system (NSLayoutManager, NSTextContainer, NSScrollView, etc).

public var wrapsTextToHorizontalBounds: Bool

TextKit 2 Features

Workarounds

In versions of macOS before 13, TextKit 2 doesn't correctly apply rendering attributes. You can sub in this NSTextLayoutFragment to workaround the issue.

extension YourClass: NSTextLayoutManagerDelegate {
    func textLayoutManager(_ textLayoutManager: NSTextLayoutManager, textLayoutFragmentFor location: NSTextLocation, in textElement: NSTextElement) -> NSTextLayoutFragment {
        let range = textElement.elementRange

        switch textElement {
        case let paragraph as NSTextParagraph:
            return ParagraphRenderingAttributeTextLayoutFragment(textParagraph: paragraph, range: range)
        default:
            return NSTextLayoutFragment(textElement: textElement, range: range)
        }
    }
}

TextKit 1 Features

NSLayoutManager extensions

func enumerateLineFragments(for range: NSRange, block: (NSRect, NSRange) -> Void)
func enumerateLineFragments(for rect: NSRect, block: (NSRect, NSRange) -> Void)

Contributing and Collaboration

I'd love to hear from you! Get in touch via an issue or pull request.

I prefer collaboration, and would love to find ways to work together if you have a similar project.

I prefer indentation with tabs for improved accessibility. But, I'd rather you use the system you want and make a PR than hesitate because of whitespace.

By participating in this project you agree to abide by the Contributor Code of Conduct.