Chromatism

This is the beginning of a syntax highlighting UITextView for iOS. Currently it only knows about Obj-C. Previously Chromatism used a combination of CoreText and UITableView for performance, but luckily that is not needed anymore.

Chromatism is currently unstable, changing quickly and without test-coverage.

License

MIT, see LICENSE.txt. If you develop Chromatism further, sharing your improvements are encouraged.

How to add Chromatism to your application:

1. Drag and drop Chromatism.xcodeproj to your project.
2. Add Chromatism as a target dependency and link to libChromatism.a
3. Make sure you have the -ObjC flag on the Other Linker Flags build setting.
4. Add "$(BUILT_PRODUCTS_DIR)/../../Headers" to the Header Search Paths build setting.

Classes

• JLTextView is a textView with a syntaxTokenixer property to a JLTokenizer
• JLTokenizer is the work horse of Chromatism. It uses scopes and tokenPatterns to appropriately tokenize a textStorage or a string. It is a delegate of NSTextStorage and UITextView.
• JLScope has a NSMutableIndexSet-property that corresponds to ranges in the textStorage. Scopes can be arranged in a complex hierarchy, especially since it is a subclass of NSOperation.
• JLTokenPattern is a subclass of JLScope. It has a regex-pattern that in -perform searches through the ranges of its parent scope.

Implementing your own syntax highlighting for another language

1. Subclass JLTokenizer.
2. Checkout JLObjectiveCTokenizer to see what to do next.
3. (Optional) Be awesome and submit a PR.