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LezerHighlighter

class LezerHighlighter implements CodeHighlighterLezerCachenull

Describes custom highlighters used by the Code node.

Constructors​

constructor​

public new LezerHighlighterparser: Parserstyle: HighlightStyle = DefaultHighlightStyle: LezerHighlighter

Parameters

  • parser: Parser
  • style: HighlightStyle = DefaultHighlightStyle

Methods​

highlight​

public highlightindex: numbercache: nullLezerCache: HighlightResult

Highlights the code at the given index.

Parameters

  • index: number

    The index of the code to highlight.

  • cache: nullLezerCache

    The result of prepare.

initialize​

public initialize(): boolean

Initializes the highlighter.

This method is called when collecting async resources for the node. It can be called multiple times so caching the initialization is recommended.

If initialization is asynchronous, a promise should be registered using DependencyContext.collectPromise and the value of false should be returned. The hook will be called again when the promise resolves. This process can be repeated until the value of true is returned which will mark the highlighter as ready.

prepare​

public preparecode: string: nullLezerCache

Prepares the code for highlighting.

This method is called each time the code changes. It can be used to do any preprocessing of the code before highlighting. The result of this method is cached and passed to highlight when the code is highlighted.

Parameters

  • code: string

    The code to prepare.

tokenize​

public tokenizecode: string: string[]

Tokenize the code.

Parameters

  • code: string

    The code to tokenize.