swift-collections

If you'd like an example of how this can be done, Swift's AttributedString type is exactly that. It manages the association of runs of attributes (font, kerning, color, etc.) with Unicode text, and its backing storage uses a rope type provided by the swift-collections package. (The rope module itself isn't stabilized yet, so it's really only used for AttributedString at this point, AFAIK.) https://github.com/swiftlang/swift-foundation/tree/main/Sour... https://github.com/apple/swift-collections/tree/main/Sources...

Bike’s most original feature is the “fluid” text editing. Lots of text editors have animated some interactions (cursor movement, insert newline, etc), but I think Bike is the first designed from the ground up to support fluid editing. Give it a try, it feels different. (movie on home page if you don't have Mac) Other Features: • In text mode Bike works like a normal text editor. In outline mode rows are constrained to outline hierarchy. • .bike file format is HTML subset, so files are easy to parse and manipulate. Bike also supports .opml and .txt. • Scriptable via AppleScript. Javascript plugin API also expected in future, though no timing on that. • Architecture needed to support fluid editing also makes Bike faster/more scalable than most (all?) outliners and many text editors. I test performance using the Moby Dick Workout[^1]. Implem