Struct SyntaxHighlighter 

pub struct SyntaxHighlighter { /* private fields */ }

Tree-sitter-based syntax highlighter for TUI code blocks.

Supports Rust, Python, JavaScript, JSON, TOML, and Bash out of the box. Language aliases ("rs" → "rust", "sh" → "bash", etc.) are resolved transparently.

Construct via the SYNTAX_HIGHLIGHTER static for process-level sharing, or call the private new method directly in tests.

Supported languages

Identifier	Aliases
rust	rs
python	py
javascript	js
bash	sh, shell
json	—
toml	—

Examples

use zeph_tui::highlight::SYNTAX_HIGHLIGHTER;
use zeph_tui::theme::SyntaxTheme;

let theme = SyntaxTheme::default();

// Known language → styled spans
let spans = SYNTAX_HIGHLIGHTER.highlight("rust", "fn main() {}", &theme);
assert!(spans.is_some());

// Alias works the same way
let spans = SYNTAX_HIGHLIGHTER.highlight("rs", "let x = 1;", &theme);
assert!(spans.is_some());

// Unknown language → None
assert!(SYNTAX_HIGHLIGHTER.highlight("brainfuck", "+++", &theme).is_none());

Implementations

impl SyntaxHighlighter

pub fn highlight( &self, lang: &str, code: &str, theme: &SyntaxTheme, ) -> Option<Vec<Span<'static>>>

Highlight code for the given lang using theme.

Returns None if the language is unsupported or if tree-sitter fails to parse the input. The returned spans concatenate to the original source text unchanged.

Arguments

• lang — language identifier or alias (case-insensitive).
• code — source code to highlight.
• theme — style mapping for each token class.

Examples

use zeph_tui::highlight::SYNTAX_HIGHLIGHTER;
use zeph_tui::theme::SyntaxTheme;

let theme = SyntaxTheme::default();
let spans = SYNTAX_HIGHLIGHTER.highlight("rust", "let x = 42;", &theme).unwrap();
let text: String = spans.iter().map(|s| s.content.as_ref()).collect();
assert_eq!(text, "let x = 42;");