feat: pre-cache PDF files

adaptor/src/image.rs

@@ -26,16 +26,10 @@ impl Image {
 			})
 		});
 
-		Ok(img.await??)
+		img.await?
 	}
 
-	pub async fn precache(path: &Path) -> Result<()> {
-		let cache = Self::cache(path);
-		if fs::metadata(&cache).await.is_ok() {
-			return Ok(());
-		}
-
-		let img = fs::read(&path).await?;
+	pub async fn precache(img: Vec<u8>, cache: PathBuf) -> Result<()> {
 		let result = tokio::task::spawn_blocking(move || {
 			let img = image::load_from_memory(&img)?;
 			let (w, h) = (PREVIEW.max_width, PREVIEW.max_height);
@@ -46,7 +40,7 @@ impl Image {
 			Ok::<(), Error>(())
 		});
 
-		Ok(result.await??)
+		result.await?
 	}
 
 	#[inline]

core/src/external/ffmpegthumbnailer.rs

@@ -4,10 +4,10 @@ use anyhow::{bail, Result};
 use config::PREVIEW;
 use tokio::process::Command;
 
-pub async fn ffmpegthumbnailer(path: &Path, dest: &Path) -> Result<()> {
+pub async fn ffmpegthumbnailer(src: &Path, dest: &Path) -> Result<()> {
 	let output = Command::new("ffmpegthumbnailer")
 		.arg("-i")
-		.arg(path)
+		.arg(src)
 		.arg("-o")
 		.arg(dest)
 		.args(["-q", "6", "-c", "jpeg", "-s", &PREVIEW.max_width.to_string()])

core/src/external/pdftoppm.rs

@@ -1,22 +1,19 @@
 use std::path::Path;
 
+use adaptor::Image;
 use anyhow::{bail, Result};
 use tokio::process::Command;
 
-pub async fn pdftoppm(path: &Path, dest: &Path) -> Result<()> {
-    let output = Command::new("pdftoppm")
-        .args(["-png", "-singlefile"])
-        .arg(path)
-        .arg(dest)
-        .kill_on_drop(true)
-        .output()
-        .await?;
+pub async fn pdftoppm(src: &Path, dest: &Path) -> Result<()> {
+	let output = Command::new("pdftoppm")
+		.args(["-singlefile", "-jpeg", "-jpegopt", "quality=75"])
+		.arg(src)
+		.kill_on_drop(true)
+		.output()
+		.await?;
 
-    if !output.status.success() {
-        bail!(
-            "failed to get pdf: {}",
-            String::from_utf8_lossy(&output.stderr)
-        );
-    }
-    Ok(())
+	if !output.status.success() {
+		bail!("failed to generate PDF thumbnail: {}", String::from_utf8_lossy(&output.stderr));
+	}
+	Ok(Image::precache(output.stdout, dest.to_path_buf()).await?)
 }

core/src/manager/manager.rs

@@ -304,6 +304,7 @@ impl Manager {
 
 		tasks.precache_image(&mimes);
 		tasks.precache_video(&mimes);
+		tasks.precache_pdf(&mimes);
 
 		self.mimetype.extend(mimes);
 		true

core/src/manager/preview.rs

@@ -59,13 +59,13 @@ impl Preview {
 		let (path, mime) = (path.to_path_buf(), mime.to_owned());
 		self.handle = Some(tokio::spawn(async move {
 			let result = match kind {
-				MimeKind::Dir => Self::folder(&path).await,
-				MimeKind::JSON => Self::json(&path).await.map(PreviewData::Text),
-				MimeKind::Text => Self::highlight(&path).await.map(PreviewData::Text),
-				MimeKind::Image => Self::image(&path).await,
-				MimeKind::Pdf => Self::pdf(&path).await,
-				MimeKind::Video => Self::video(&path).await,
 				MimeKind::Archive => Self::archive(&path).await.map(PreviewData::Text),
+				MimeKind::Dir => Self::folder(&path).await,
+				MimeKind::Image => Self::image(&path).await,
+				MimeKind::Video => Self::video(&path).await,
+				MimeKind::JSON => Self::json(&path).await.map(PreviewData::Text),
+				MimeKind::PDF => Self::pdf(&path).await,
+				MimeKind::Text => Self::highlight(&path).await.map(PreviewData::Text),
 				MimeKind::Others => Err(anyhow!("Unsupported mimetype: {mime}")),
 			};
 
@@ -118,17 +118,13 @@ impl Preview {
 		Self::image(&cache).await
 	}
 
-    pub async fn pdf(path: &Path) -> Result<PreviewData> {
+	pub async fn pdf(path: &Path) -> Result<PreviewData> {
 		let cache = Image::cache(path);
 		if fs::metadata(&cache).await.is_err() {
 			external::pdftoppm(path, &cache).await?;
 		}
 
-        let mut dest = cache.into_os_string();
-        dest.push(".png");
-
-        let dest = Path::new(&dest);
-		Self::image(dest).await
+		Self::image(&cache).await
 	}
 
 	pub async fn json(path: &Path) -> Result<String> {

core/src/tasks/scheduler.rs

@@ -375,4 +375,11 @@ impl Scheduler {
 
 		self.precache.video(id, targets).ok();
 	}
+
+	pub(super) fn precache_pdf(&self, targets: Vec<PathBuf>) {
+		let name = format!("Precache of {} PDF files", targets.len());
+		let id = self.running.write().add(name);
+
+		self.precache.pdf(id, targets).ok();
+	}
 }

core/src/tasks/tasks.rs

@@ -265,6 +265,19 @@ impl Tasks {
 		}
 		false
 	}
+
+	pub fn precache_pdf(&self, mimetype: &BTreeMap<PathBuf, String>) -> bool {
+		let targets = mimetype
+			.into_iter()
+			.filter(|(_, m)| MimeKind::new(m) == MimeKind::PDF)
+			.map(|(p, _)| p.clone())
+			.collect::<Vec<_>>();
+
+		if !targets.is_empty() {
+			self.scheduler.precache_pdf(targets);
+		}
+		false
+	}
 }
 
 impl Tasks {

core/src/tasks/workers/precache.rs

@@ -21,6 +21,7 @@ pub(crate) struct Precache {
 pub(crate) enum PrecacheOp {
 	Image(PrecacheOpImage),
 	Video(PrecacheOpVideo),
+	PDF(PrecacheOpPDF),
 }
 
 #[derive(Debug)]
@@ -48,6 +49,12 @@ pub(crate) struct PrecacheOpVideo {
 	pub target: PathBuf,
 }
 
+#[derive(Debug)]
+pub(crate) struct PrecacheOpPDF {
+	pub id:     usize,
+	pub target: PathBuf,
+}
+
 impl Precache {
 	pub(crate) fn new(sch: mpsc::UnboundedSender<TaskOp>) -> Self {
 		let (tx, rx) = async_channel::unbounded();
@@ -59,13 +66,20 @@ impl Precache {
 		Ok(match self.rx.recv().await? {
 			PrecacheOp::Image(t) => (t.id, PrecacheOp::Image(t)),
 			PrecacheOp::Video(t) => (t.id, PrecacheOp::Video(t)),
+			PrecacheOp::PDF(t) => (t.id, PrecacheOp::PDF(t)),
 		})
 	}
 
 	pub(crate) async fn work(&self, task: &mut PrecacheOp) -> Result<()> {
 		match task {
 			PrecacheOp::Image(task) => {
-				Image::precache(&task.target).await.ok();
+				let cache = Image::cache(&task.target);
+				if fs::metadata(&cache).await.is_ok() {
+					return Ok(self.sch.send(TaskOp::Adv(task.id, 1, 0))?);
+				}
+				if let Ok(img) = fs::read(&task.target).await {
+					Image::precache(img, cache).await.ok();
+				}
 				self.sch.send(TaskOp::Adv(task.id, 1, 0))?;
 			}
 			PrecacheOp::Video(task) => {
@@ -77,6 +91,15 @@ impl Precache {
 				external::ffmpegthumbnailer(&task.target, &cache).await.ok();
 				self.sch.send(TaskOp::Adv(task.id, 1, 0))?;
 			}
+			PrecacheOp::PDF(task) => {
+				let cache = Image::cache(&task.target);
+				if fs::metadata(&cache).await.is_ok() {
+					return Ok(self.sch.send(TaskOp::Adv(task.id, 1, 0))?);
+				}
+
+				external::pdftoppm(&task.target, &cache).await.ok();
+				self.sch.send(TaskOp::Adv(task.id, 1, 0))?;
+			}
 		}
 		Ok(())
 	}
@@ -132,4 +155,12 @@ impl Precache {
 		}
 		self.done(id)
 	}
+
+	pub(crate) fn pdf(&self, id: usize, targets: Vec<PathBuf>) -> Result<()> {
+		for target in targets {
+			self.sch.send(TaskOp::New(id, 0))?;
+			self.tx.send_blocking(PrecacheOp::PDF(PrecacheOpPDF { id, target }))?;
+		}
+		self.done(id)
+	}
 }

cspell.json

@@ -1 +1 @@
-{"words":["Punct","KEYMAP","splitn","crossterm","YAZI","unar","peekable","ratatui","syntect","pbpaste","pbcopy","ffmpegthumbnailer","oneshot","Posix","Lsar","XADDOS","zoxide","cands","Deque","precache","imageops","IFBLK","IFCHR","IFDIR","IFIFO","IFLNK","IFMT","IFSOCK","IRGRP","IROTH","IRUSR","ISGID","ISUID","ISVTX","IWGRP","IWOTH","IWUSR","IXGRP","IXOTH","IXUSR","libc","winsize","TIOCGWINSZ","xpixel","ypixel","ioerr","appender","Catppuccin","macchiato","gitmodules","Dotfiles","bashprofile","vimrc","flac","webp","exiftool","mediainfo","ripgrep","nvim","indexmap","indexmap","unwatch","canonicalize","serde","fsevent","Ueberzug","iterm","wezterm","sixel","chafa","ueberzugpp","️ Überzug","️ Überzug","Konsole","Alacritty","Überzug","pkgs","paru","unarchiver"],"version":"0.2","language":"en","flagWords":[]}
+{"words":["Punct","KEYMAP","splitn","crossterm","YAZI","unar","peekable","ratatui","syntect","pbpaste","pbcopy","ffmpegthumbnailer","oneshot","Posix","Lsar","XADDOS","zoxide","cands","Deque","precache","imageops","IFBLK","IFCHR","IFDIR","IFIFO","IFLNK","IFMT","IFSOCK","IRGRP","IROTH","IRUSR","ISGID","ISUID","ISVTX","IWGRP","IWOTH","IWUSR","IXGRP","IXOTH","IXUSR","libc","winsize","TIOCGWINSZ","xpixel","ypixel","ioerr","appender","Catppuccin","macchiato","gitmodules","Dotfiles","bashprofile","vimrc","flac","webp","exiftool","mediainfo","ripgrep","nvim","indexmap","indexmap","unwatch","canonicalize","serde","fsevent","Ueberzug","iterm","wezterm","sixel","chafa","ueberzugpp","️ Überzug","️ Überzug","Konsole","Alacritty","Überzug","pkgs","paru","unarchiver","pdftoppm"],"version":"0.2","language":"en","flagWords":[]}

shared/src/mime.rs

@@ -2,13 +2,16 @@ pub const MIME_DIR: &str = "inode/directory";
 
 #[derive(Clone, Copy, PartialEq, Eq)]
 pub enum MimeKind {
+	Archive,
 	Dir,
-	JSON,
-	Text,
+
 	Image,
 	Video,
-    Pdf,
-	Archive,
+
+	JSON,
+	PDF,
+	Text,
+
 	Others,
 }
 
@@ -28,7 +31,6 @@ impl MimeKind {
 			"message" => true,
 			"model" => true,
 			"multipart" => true,
-            "pdf" => true,
 			"text" => true,
 			"video" => true,
 			_ => false,
@@ -39,16 +41,16 @@ impl MimeKind {
 	pub fn new(s: &str) -> Self {
 		if s == MIME_DIR {
 			Self::Dir
-		} else if s == "application/json" {
-			Self::JSON
-		} else if s == "application/pdf" {
-			Self::Pdf
 		} else if s.starts_with("text/") || s.ends_with("/xml") {
 			Self::Text
 		} else if s.starts_with("image/") {
 			Self::Image
 		} else if s.starts_with("video/") {
 			Self::Video
+		} else if s == "application/json" {
+			Self::JSON
+		} else if s == "application/pdf" {
+			Self::PDF
 		} else if s == "application/x-bzip"
 			|| s == "application/x-bzip2"
 			|| s == "application/gzip"