toll

src/daemon.rs

@@ -17,21 +17,73 @@ use wl_clipboard_rs::paste::Seat;
 pub(crate) fn handle_peer(
     mut peer: UnixStream,
     next_id: Arc<AtomicU64>,
+    last_copied: Arc<AtomicU64>,
     items: Arc<Mutex<Vec<Entry>>>,
 ) -> eyre::Result<()> {
     let mut request = [0; 1];
-    peer.read_exact(&mut request)
-        .wrap_err("failed to read message type")?;
+    let Ok(()) = peer.read_exact(&mut request) else {
+        return Ok(());
+    };
     match request[0] {
         super::MESSAGE_STORE => {
-            let mime_types =
-                wl_clipboard_rs::paste::get_mime_types(ClipboardType::Regular, Seat::Unspecified)
-                    .wrap_err("getting mime types")?;
+            handle_store(next_id, last_copied, &items).wrap_err("handling store message")?;
+        }
+        super::MESSAGE_READ => {
+            let items = items.lock().unwrap();
 
+            ciborium::into_writer(items.as_slice(), BufWriter::new(peer))
+                .wrap_err("writing items to socket")?;
+        }
+        super::MESSAGE_COPY => {
+            handle_copy(peer, last_copied, items).wrap_err("handling copy message")?;
+        }
+        _ => {}
+    };
+    Ok(())
+}
+
+fn handle_copy(
+    mut peer: UnixStream,
+    last_copied: Arc<AtomicU64>,
+    items: Arc<Mutex<Vec<Entry>>>,
+) -> Result<(), eyre::Error> {
+    let mut id = [0; 8];
+    peer.read_exact(&mut id).wrap_err("failed to read id")?;
+    let id = u64::from_le_bytes(id);
+    let mut items = items.lock().unwrap();
+    let Some(idx) = items.iter().position(|item| item.id == id) else {
+        return Ok(());
+    };
+    let entry = items.remove(idx);
+    items.push(entry.clone());
+    let mut opts = wl_clipboard_rs::copy::Options::new();
+    opts.clipboard(wl_clipboard_rs::copy::ClipboardType::Regular)
+        .seat(wl_clipboard_rs::copy::Seat::All);
+    let result = wl_clipboard_rs::copy::copy(
+        opts,
+        wl_clipboard_rs::copy::Source::Bytes(entry.data.into_boxed_slice()),
+        wl_clipboard_rs::copy::MimeType::Specific(entry.mime),
+    );
+    last_copied.store(entry.id, std::sync::atomic::Ordering::Relaxed);
+    if let Err(err) = result {
+        println!("WARNING: Copy failed: {err:?}");
+    }
+    Ok(())
+}
+
+fn handle_store(
+    next_id: Arc<AtomicU64>,
+    last_copied: Arc<AtomicU64>,
+    items: &Arc<Mutex<Vec<Entry>>>,
+) -> Result<(), eyre::Error> {
     let time = SystemTime::now()
         .duration_since(SystemTime::UNIX_EPOCH)
         .unwrap();
 
+    let mime_types =
+        wl_clipboard_rs::paste::get_mime_types(ClipboardType::Regular, Seat::Unspecified)
+            .wrap_err("getting mime types")?;
+
     let Some(mime) = ["text/plain", "image/png"]
         .iter()
         .find(|mime| mime_types.contains(**mime))
@@ -48,54 +100,58 @@ pub(crate) fn handle_peer(
     .wrap_err("getting contents")?;
 
     let mut data_reader = data_readear.take(MAX_ENTRY_SIZE);
-
     let mut data = Vec::new();
     data_reader
         .read_to_end(&mut data)
         .wrap_err("reading content data")?;
 
-            items.lock().unwrap().push(Entry {
+    let new_entry = Entry {
         id: next_id.fetch_add(1, std::sync::atomic::Ordering::Relaxed),
         mime: mime.to_string(),
         data,
         created_time: u64::try_from(time.as_millis()).unwrap(),
-            });
+    };
 
-            println!("INFO Successfully stored clipboard value of mime type {mime}");
-        }
-        super::MESSAGE_READ => {
-            let items = items.lock().unwrap();
-
-            ciborium::into_writer(items.as_slice(), BufWriter::new(peer))
-                .wrap_err("writing items to socket")?;
-        }
-        super::MESSAGE_COPY => {
-            let mut id = [0; 8];
-            peer.read_exact(&mut id).wrap_err("failed to read id")?;
-            let id = u64::from_le_bytes(id);
-
-            let items = items.lock().unwrap();
-
-            let Some(idx) = items.iter().position(|item| item.id == id) else {
+    let mut items = items.lock().unwrap();
+    if items
+        .last()
+        .is_some_and(|last| last.mime == new_entry.mime && last.data == new_entry.data)
+    {
+        println!("INFO: Skipping store of new item because it is identical to last one");
         return Ok(());
-            };
+    }
 
-            let entry = items[idx].clone();
+    let last_copied = last_copied.load(std::sync::atomic::Ordering::Relaxed);
+    if let Some(item) = items.iter().find(|item| item.id == last_copied)
+        && item.mime == new_entry.mime
+        && item.data == new_entry.data
+    {
+        println!("INFO: Skipping store of new item because the copy came from us");
+        return Ok(());
+    }
 
-            // select
-            let mut opts = wl_clipboard_rs::copy::Options::new();
-            opts.clipboard(wl_clipboard_rs::copy::ClipboardType::Regular);
-            let result = wl_clipboard_rs::copy::copy(
-                opts,
-                wl_clipboard_rs::copy::Source::Bytes(entry.data.into_boxed_slice()),
-                wl_clipboard_rs::copy::MimeType::Specific(entry.mime),
+    items.push(new_entry);
+
+    let mut running_total = 0;
+    let mut cutoff = None;
+    for (idx, item) in items.iter().enumerate().rev() {
+        running_total += item.data.len() + std::mem::size_of::<Entry>();
+        if running_total > crate::MAX_HISTORY_BYTE_SIZE {
+            cutoff = Some(idx);
+        }
+    }
+    if let Some(cutoff) = cutoff {
+        println!(
+            "INFO: Dropping old {} items because limit of {} bytes was reached for the history",
+            cutoff + 1,
+            crate::MAX_HISTORY_BYTE_SIZE
         );
-            if let Err(err) = result {
-                println!("WARNING: Copy failed: {err:?}");
+        items.splice(0..=cutoff, []);
     }
-        }
-        _ => {}
-    };
+
+    println!(
+        "INFO: Successfully stored clipboard value of mime type {mime} (new history size {running_total})"
+    );
     Ok(())
 }
 
@@ -106,6 +162,8 @@ pub fn main(socket_path: &PathBuf) -> eyre::Result<()> {
 
     let next_id = Arc::new(AtomicU64::new(0));
     let items = Arc::new(Mutex::new(Vec::<Entry>::new()));
+    // for deduplication because the event stream will tell us that we just copied something :)
+    let last_copied = Arc::new(AtomicU64::new(u64::MAX));
 
     println!("INFO: Listening on {}", socket_path.display());
 
@@ -114,8 +172,9 @@ pub fn main(socket_path: &PathBuf) -> eyre::Result<()> {
             Ok(peer) => {
                 let next_id = next_id.clone();
                 let items = items.clone();
+                let last_copied = last_copied.clone();
                 std::thread::spawn(move || {
-                    let result = handle_peer(peer, next_id, items);
+                    let result = handle_peer(peer, next_id, last_copied, items);
                     if let Err(err) = result {
                         eprintln!("ERROR: Error handling peer: {err:?}");
                     }

src/display.rs

@@ -5,7 +5,12 @@ use crate::MESSAGE_READ;
 
 use super::MESSAGE_COPY;
 
-use std::{io::{BufReader, Write}, os::unix::net::UnixStream, path::Path, time::Instant};
+use std::{
+    io::{BufReader, Write},
+    os::unix::net::UnixStream,
+    path::Path,
+    time::Instant,
+};
 
 use super::Entry;
 
@@ -44,14 +49,21 @@ impl eframe::App for App {
                 .show_inside(ui, |ui| {
                     ui.heading("History");
 
+                    ui.add_space(10.0);
+
                     for (idx, item) in self.items.iter().enumerate() {
-                        let mut frame = egui::Frame::new();
+                        let mut frame = egui::Frame::new().inner_margin(3.0);
                         if self.selected_idx == idx {
                             frame = frame.stroke(egui::Stroke::new(1.0, egui::Color32::PURPLE));
                         }
                         frame.show(ui, |ui| match item.mime.as_str() {
                             "text/plain" => {
-                                ui.label(str::from_utf8(&item.data).unwrap_or("<invalid UTF-8>"));
+                                let mut full =
+                                    str::from_utf8(&item.data).unwrap_or("<invalid UTF-8>");
+                                if full.len() > 1000 {
+                                    full = &full[..1000];
+                                }
+                                ui.label(full);
                             }
                             "image/png" => {
                                 ui.label("<image>");
@@ -60,6 +72,8 @@ impl eframe::App for App {
                                 ui.label("<unsupported mime type>");
                             }
                         });
+
+                        ui.separator();
                     }
                 });
 
@@ -69,6 +83,8 @@ impl eframe::App for App {
                     return;
                 };
 
+                ui.add_space(10.0);
+
                 match item.mime.as_str() {
                     "text/plain" => {
                         ui.label(str::from_utf8(&item.data).unwrap_or("<invalid UTF-8>"));
@@ -101,13 +117,15 @@ pub fn main(socket_path: &Path) -> eyre::Result<()> {
 
     println!("INFO: Reading clipboard history from socket");
     let start = Instant::now();
-    let items =
+    let mut items: Vec<Entry> =
         ciborium::from_reader(BufReader::new(socket)).wrap_err("reading items from socket")?;
     println!(
         "INFO: Read clipboard history from socket in {:?}",
         start.elapsed()
     );
 
+    items.reverse();
+
     // heh. good design.
     let socket = UnixStream::connect(&socket_path).wrap_err_with(|| {
         format!(

src/main.rs

@@ -1,10 +1,11 @@
-mod display;
 mod daemon;
+mod display;
 
-use std::{io::Write, os::unix::net::UnixStream};
 use eyre::{Context, OptionExt, bail};
+use std::{io::Write, os::unix::net::UnixStream};
 
-const MAX_ENTRY_SIZE: u64 = 100_000_000;
+const MAX_ENTRY_SIZE: u64 = 50_000_000;
+const MAX_HISTORY_BYTE_SIZE: usize = 100_000_000;
 
 #[derive(Clone, serde::Deserialize, serde::Serialize)]
 struct Entry {
@@ -38,6 +39,11 @@ fn main() -> eyre::Result<()> {
                 )
             })?;
 
+            if std::env::args().any(|arg| arg == "--wl-copy") {
+                std::io::copy(&mut std::io::stdin(), &mut std::io::empty())
+                    .wrap_err("reading stdin in --wl-copy mode")?;
+            }
+
             socket
                 .write_all(&[MESSAGE_STORE])
                 .wrap_err("writing request type")?;