feat: wip highlight section of preview

yazi-binding/src/elements/highlight.rs

@@ -0,0 +1,39 @@
+use mlua::{
+	ExternalError, FromLua, IntoLua, Lua, Result as LuaResult, Table, UserData, UserDataMethods,
+	Value,
+};
+
+const EXPECTED: &str = "expected a table containing a line and a length";
+
+#[derive(Clone, Debug)]
+pub struct HighlightPosition {
+	pub line: usize,
+	pub length: usize,
+}
+
+impl HighlightPosition {
+	pub fn compose(lua: &Lua) -> LuaResult<Value> {
+		let new = lua.create_function(|_, (line, length): (usize, usize)| Ok(Self { line, length }))?;
+
+		let tbl = lua.create_table_from([("new", new)])?;
+		tbl.into_lua(lua)
+	}
+}
+
+impl FromLua for HighlightPosition {
+	fn from_lua(value: Value, _: &Lua) -> mlua::Result<Self> {
+		match value {
+			Value::Table(tbl) => Ok(Self { line: tbl.raw_get("line")?, length: tbl.raw_get("length")? }),
+			_ => Err(EXPECTED.into_lua_err()),
+		}
+	}
+}
+
+impl IntoLua for HighlightPosition {
+	fn into_lua(self, lua: &Lua) -> LuaResult<Value> {
+		let tbl = lua.create_table()?;
+		tbl.set("line", self.line)?;
+		tbl.set("length", self.length)?;
+		Ok(Value::Table(tbl))
+	}
+}

yazi-binding/src/elements/mod.rs

@@ -1 +1 @@
-yazi_macro::mod_flat!(align area bar border cell clear color constraint edge elements gauge layout line list pad pos rect renderable row span table text wrap);
+yazi_macro::mod_flat!(align area bar border cell clear color constraint edge highlight elements gauge layout line list pad pos rect renderable row span table text wrap);

yazi-core/src/highlighter.rs

@@ -1,8 +1,20 @@
-use std::{io::{BufRead, BufReader, Cursor, Seek}, path::PathBuf, sync::OnceLock};
+use std::{
+	io::{BufRead, BufReader, Cursor, Seek},
+	path::PathBuf,
+	sync::OnceLock,
+};
 
 use anyhow::{Result, anyhow, bail};
-use ratatui::{layout::Size, text::{Line, Span, Text}};
-use syntect::{LoadingError, dumps, easy::HighlightLines, highlighting::{self, Theme, ThemeSet}, parsing::{SyntaxReference, SyntaxSet}};
+use ratatui::{
+	layout::Size,
+	text::{Line, Span, Text},
+};
+use syntect::{
+	LoadingError, dumps,
+	easy::HighlightLines,
+	highlighting::{self, Theme, ThemeSet},
+	parsing::{SyntaxReference, SyntaxSet},
+};
 use yazi_config::{THEME, YAZI};
 use yazi_runner::previewer::PeekError;
 use yazi_shared::{Id, Ids, replace_to_printable};
@@ -11,17 +23,17 @@ use yazi_shim::ratatui::LineIter;
 static INCR: Ids = Ids::new();
 
 pub struct Highlighter {
-	path:   PathBuf,
+	path: PathBuf,
 	reader: BufReader<std::fs::File>,
 
-	skip:   usize,
-	size:   Size,
+	skip: usize,
+	size: Size,
 	ticket: Id,
 
-	theme:    &'static Theme,
+	theme: &'static Theme,
 	syntaxes: &'static SyntaxSet,
-	inner:    Option<HighlightLines<'static>>,
-	syntax:   Option<&'static SyntaxReference>,
+	inner: Option<HighlightLines<'static>>,
+	syntax: Option<&'static SyntaxReference>,
 }
 
 impl Highlighter {
@@ -57,7 +69,9 @@ impl Highlighter {
 		})
 	}
 
-	pub fn abort() { INCR.next(); }
+	pub fn abort() {
+		INCR.next();
+	}
 
 	fn highlight(mut self) -> Result<Text<'static>, PeekError> {
 		self.load_syntax()?;
@@ -220,7 +234,7 @@ impl Highlighter {
 
 			Span {
 				content: s.into(),
-				style:   ratatui::style::Style {
+				style: ratatui::style::Style {
 					fg: Self::to_ansi_color(style.foreground),
 					// bg: Self::to_ansi_color(style.background),
 					add_modifier: modifier,