word wrap in preview

Cargo.lock

@@ -1830,6 +1830,12 @@ version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
+[[package]]
+name = "smawk"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7c388c1b5e93756d0c740965c41e8822f866621d41acbdf6336a6a168f8840c"
+
 [[package]]
 name = "socket2"
 version = "0.5.7"
@@ -1941,6 +1947,17 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
+dependencies = [
+ "smawk",
+ "unicode-linebreak",
+ "unicode-width",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.59"
@@ -2242,6 +2259,12 @@ version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
+[[package]]
+name = "unicode-linebreak"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b09c83c3c29d37506a3e260c08c03743a6bb66a9cd432c6934ab501a190571f"
+
 [[package]]
 name = "unicode-normalization"
 version = "0.1.23"
@@ -2864,6 +2887,7 @@ dependencies = [
  "shell-escape",
  "shell-words",
  "syntect",
+ "textwrap",
  "tokio",
  "tokio-stream",
  "tokio-util",

yazi-config/preset/yazi.toml

@@ -17,6 +17,7 @@ mouse_events   = [ "click", "scroll" ]
 
 [preview]
 tab_size        = 2
+word_wrap		= false
 max_width       = 600
 max_height      = 900
 cache_dir       = ""

yazi-config/src/preview/preview.rs

@@ -9,6 +9,7 @@ use crate::{validation::check_validation, Xdg, MERGED_YAZI};
 #[derive(Debug, Serialize)]
 pub struct Preview {
 	pub tab_size:   u8,
+	pub word_wrap: bool,
 	pub max_width:  u32,
 	pub max_height: u32,
 
@@ -31,6 +32,7 @@ impl Default for Preview {
 		#[derive(Deserialize, Validate)]
 		struct Shadow {
 			tab_size:   u8,
+			word_wrap:  bool,
 			max_width:  u32,
 			max_height: u32,
 
@@ -55,6 +57,7 @@ impl Default for Preview {
 
 		Preview {
 			tab_size: preview.tab_size,
+			word_wrap: preview.word_wrap,
 			max_width: preview.max_width,
 			max_height: preview.max_height,
 

yazi-plugin/Cargo.toml

@@ -39,6 +39,7 @@ tokio         = { version = "1.38.0", features = [ "full" ] }
 tokio-stream  = "0.1.15"
 tokio-util    = "0.7.11"
 unicode-width = "0.1.13"
+textwrap	  = "0.14.2"
 yazi-prebuild = "0.1.2"
 
 # Logging

yazi-plugin/src/external/highlighter.rs

@@ -6,6 +6,8 @@ use syntect::{dumps, easy::HighlightLines, highlighting::{self, Theme, ThemeSet}
 use tokio::{fs::File, io::{AsyncBufReadExt, BufReader}};
 use yazi_config::{PREVIEW, THEME};
 use yazi_shared::PeekError;
+use ratatui::prelude::Rect;
+use textwrap::wrap as textwrap_wrap;
 
 static INCR: AtomicUsize = AtomicUsize::new(0);
 static SYNTECT_SYNTAX: OnceLock<SyntaxSet> = OnceLock::new();
@@ -56,20 +58,20 @@ impl Highlighter {
 		syntaxes.find_syntax_by_first_line(&line).ok_or_else(|| anyhow!("No syntax found"))
 	}
 
-	pub async fn highlight(&self, skip: usize, limit: usize) -> Result<Text<'static>, PeekError> {
+	pub async fn highlight(&self, skip: usize, area: Rect, wrap: bool) -> Result<Text<'static>, PeekError> {
 		let mut reader = BufReader::new(File::open(&self.path).await?);
 
 		let syntax = Self::find_syntax(&self.path).await;
 		let mut plain = syntax.is_err();
 
 		let mut before = Vec::with_capacity(if plain { 0 } else { skip });
-		let mut after = Vec::with_capacity(limit);
+		let mut after = Vec::with_capacity(area.height as usize);
 
 		let mut i = 0;
 		let mut buf = vec![];
 		while reader.read_until(b'\n', &mut buf).await.is_ok() {
 			i += 1;
-			if buf.is_empty() || i > skip + limit {
+			if buf.is_empty() || i > skip + area.height as usize {
 				break;
 			}
 
@@ -84,23 +86,40 @@ impl Highlighter {
 				buf.push(b'\n');
 			}
 
+			let line = String::from_utf8_lossy(&buf).into_owned();
+
 			if i > skip {
-				after.push(String::from_utf8_lossy(&buf).into_owned());
+				after.push(line);
 			} else if !plain {
-				before.push(String::from_utf8_lossy(&buf).into_owned());
+				before.push(line);
 			}
 			buf.clear();
 		}
 
-		if skip > 0 && i < skip + limit {
+		if skip > 0 && i < skip + area.height as usize {
-			return Err(PeekError::Exceed(i.saturating_sub(limit)));
+			return Err(PeekError::Exceed(i.saturating_sub(area.height as usize)));
 		}
 
+		let indent = " ".repeat(PREVIEW.tab_size as usize);
+		let after_text = after.join("").replace('\t', &indent);
+
 		if plain {
-			let indent = " ".repeat(PREVIEW.tab_size as usize);
+			let wrapped_text = if wrap {
-			Ok(Text::from(after.join("").replace('\t', &indent)))
+				textwrap_wrap(&after_text, area.width as usize).join("\n")
+			} else {
+				after_text
+			};
+			Ok(Text::from(wrapped_text))
 		} else {
-			Self::highlight_with(before, after, syntax.unwrap()).await
+			let wrapped_after: Vec<String> = if wrap {
+				textwrap_wrap(&after_text, area.width as usize)
+					.into_iter()
+					.map(|cow| cow.trim_end_matches('\n').to_string())
+					.collect()
+			} else {
+				after
+			};
+			Self::highlight_with(before, wrapped_after, syntax.unwrap()).await
 		}
 	}
 

yazi-plugin/src/utils/preview.rs

@@ -2,6 +2,7 @@ use mlua::{AnyUserData, IntoLuaMulti, Lua, Table, Value};
 use yazi_shared::{emit, event::Cmd, Layer, PeekError};
 
 use super::Utils;
+use yazi_config::PREVIEW;
 use crate::{bindings::{FileRef, Window}, cast_to_renderable, elements::{Paragraph, RectRef, Renderable}, external::{self, Highlighter}};
 
 pub struct PreviewLock {
@@ -37,7 +38,7 @@ impl Utils {
 				let mut lock = PreviewLock::try_from(t)?;
 
 				let text =
-					match Highlighter::new(&lock.url).highlight(lock.skip, area.height as usize).await {
+					match Highlighter::new(&lock.url).highlight(lock.skip, *area, PREVIEW.word_wrap).await {
 						Ok(text) => text,
 						Err(PeekError::Exceed(max)) => return (false, max).into_lua_multi(lua),
 						Err(_) => return (false, Value::Nil).into_lua_multi(lua),