12 lines
930 B
Markdown
12 lines
930 B
Markdown
TypeScript library for handling source code strings.
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It has its own String type that deals with unicode in a saner than JS's UTF16 strings.
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This take in JS string, and makes it into a fat string `SourceText` that handles all the insanity of UTF16 in JS (like JS leaking UTF16 internals so that there are code-points spanning multiple indices in the string array).
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- it handles NFC Normalization
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- makes the original string easy to traverse in error-free way by introducing a character abstraction - type `CodePoint` and its position within the SourceText called `CodePointIndex`
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- It also tracks where line start (handling various platform specific weirdness like `\r\n`)
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It also allows for Spatial Tracking or verious sub-regions within the source. It introduces
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- point-like `SourceLocation` abstraction (basically where a cursor could be)
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- and interval-like `Span` abstraction (basically what a mouse selection could span)
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