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Rearrange

Rearrange is a collection of utilities for making it easier to work with NSRange, IndexSet, and String.Index.

If you need to work with NSTextRange/UITextRange or just TextKit in general, check out Glyph.

Integration

Swift Package Manager:

swiftCopy
dependencies: [
    .package(url: "https://github.com/ChimeHQ/Rearrange")
]

Types

RangeMutation

This is a struct that encapsulates a single change to an NSRange. It's useful for serializing, queuing, or otherwise storing changes and applying them.

You can also use this class to tranform locations, NSRange, or even an IndexSet. This is handy for updating values as text is changed. This might seem easy, but there are a large number of edge cases that RangeMutation handles, including mutations that invalidate (for example completely delete) a range.

Extensions

NSRange

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// convenience
static let zero: NSRange
static let notFound: NSRange
var max: Int

// shifting
func shifted(by delta: Int) -> NSRange?
func shifted(endBy delta: Int) -> NSRange?
func shifted(startBy delta: Int) -> NSRange?

// mutating
func clamped(to limit: Int) -> NSRange
func apply(_ change: RangeMutation) -> NSRange?

// working with Swift String
func range(in string: String) -> Range<String.Index>?

IndexSet

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init(integersIn range: NSRange)
init(ranges: [NSRange])
mutating func insert(range: NSRange)
mutating func insert(ranges: [NSRange])
mutating func remove(integersIn range: NSRange)
var nsRangeView: [NSRange]
func contains(integersIn range: NSRange) -> Bool
func intersects(integersIn range: NSRange) -> Bool
var limitSpanningRange: NSRange?

String

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subscript(range: Range<Int>) -> Substring?
subscript(range: NSRange) -> Substring?

Contributing and Collaboration

I would love to hear from you! Issues or pull requests work great. Both a Matrix space and Discord are available for live help, but I have a strong bias towards answering in the form of documentation. You can also find me on mastodon.

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.