Trait SyntaxHighlighter 

pub trait SyntaxHighlighter: Send + Sync {
    // Required method
    fn highlight_block(&self, text: &str, ctx: &mut HighlightContext);
}

A user-implemented syntax highlighter that applies visual-only formatting.

Inspired by Qt’s QSyntaxHighlighter. Implement this trait and attach it to a document via TextDocument::set_syntax_highlighter.

The highlighter is called once per block when the document content changes. Use HighlightContext::set_format to apply highlight spans. Use HighlightContext::set_current_block_state and HighlightContext::previous_block_state for multi-block constructs (e.g., multiline comments).

Required Methods

fn highlight_block(&self, text: &str, ctx: &mut HighlightContext)

Called for each block that needs re-highlighting.

Implementors