357 lines
13 KiB
Rust
357 lines
13 KiB
Rust
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use std::collections::HashMap;
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use std::io::{Read, Write};
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use std::ops::Deref;
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use std::sync::mpsc;
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use std::sync::{Arc, Mutex};
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use std::thread::sleep;
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use std::time::Duration;
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use sctk::data_device::{DataDevice, DataSource, DataSourceEvent};
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use sctk::keyboard::{map_keyboard_auto, Event as KbEvent};
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use sctk::reexports::client::protocol::{
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wl_data_device_manager, wl_display::WlDisplay, wl_pointer::Event as PtrEvent, wl_registry,
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wl_seat,
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};
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use sctk::reexports::client::{Display, EventQueue, GlobalEvent, GlobalManager, NewProxy};
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use sctk::wayland_client::sys::client::wl_display;
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/// Used to store registered seats and their last event serial
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type SeatMap = HashMap<String, (Arc<Mutex<DataDevice>>, u32)>;
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/// Object representing the Wayland clipboard
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pub struct ThreadedClipboard {
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request_send: mpsc::Sender<ThreadRequest>,
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load_recv: mpsc::Receiver<String>,
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}
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// Kill thread when clipboard object is dropped
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impl Drop for ThreadedClipboard {
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fn drop(&mut self) {
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self.request_send.send(ThreadRequest::Kill).unwrap()
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}
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}
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impl ThreadedClipboard {
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/// Creates a new wayland clipboard object
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///
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/// Spawns a new thread to dispatch messages to the wayland server every
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/// 50ms to ensure the server can read stored data
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pub fn new(display: &Display) -> Self {
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let (request_send, request_recv) = mpsc::channel();
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let (load_send, load_recv) = mpsc::channel();
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let display = display.clone();
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// Spawn a thread to handle the clipboard as regular dispatching of the wayland thread is needed
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std::thread::spawn(move || {
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let mut event_queue = display.create_event_queue();
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let display = (*display)
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.as_ref()
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.make_wrapper(&event_queue.get_token())
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.unwrap();
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clipboard_thread(&display, &mut event_queue, request_recv, load_send);
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});
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ThreadedClipboard {
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request_send,
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load_recv,
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}
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}
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/// Creates a new wayland clipboard object from a mutable `wl_display` ptr
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///
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/// Spawns a new thread to dispatch messages to the wayland server every
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/// 50ms to ensure the server can read stored data
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pub unsafe fn new_threaded_from_external(display_ptr: *mut wl_display) -> Self {
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let (request_send, request_recv) = mpsc::channel();
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let (load_send, load_recv) = mpsc::channel();
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let display = display_ptr.as_mut().unwrap();
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// Spawn a thread to handle the clipboard as regular dispatching of the wayland thread is needed
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std::thread::spawn(move || {
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let (display, mut event_queue) = Display::from_external_display(display);
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clipboard_thread(&display, &mut event_queue, request_recv, load_send);
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});
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ThreadedClipboard {
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request_send,
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load_recv,
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}
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}
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/// Returns text from the wayland clipboard
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///
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/// If provided with a seat name that seat must be in
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/// focus to work. Otherwise if no seat name is provided
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/// the name of the seat to last generate a key or pointer event
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/// is used
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pub fn load(&mut self, seat_name: Option<String>) -> String {
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self.request_send
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.send(ThreadRequest::Load(seat_name))
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.unwrap();
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self.load_recv.recv().unwrap()
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}
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/// Stores text in the wayland clipboard
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///
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/// If provided with a seat name that seat must be in
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/// focus to work. Otherwise if no seat name is provided
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/// the name of the seat to last generate a key or pointer event
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/// is used
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pub fn store(&mut self, seat_name: Option<String>, text: String) {
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self.request_send
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.send(ThreadRequest::Store(seat_name, text))
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.unwrap()
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}
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}
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/// Requests sent to the clipboard thread
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enum ThreadRequest {
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/// Store text in a specific seats clipboard
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Store(Option<String>, String),
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/// Load text from a specific seats clipboard
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Load(Option<String>),
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/// Kill the thread
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Kill,
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}
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/// Handles the setup and running of the clipboard thread
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fn clipboard_thread(
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display: &WlDisplay,
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event_queue: &mut EventQueue,
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request_recv: mpsc::Receiver<ThreadRequest>,
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load_send: mpsc::Sender<String>,
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) {
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// Create a seat map to register seats
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let seat_map = Arc::new(Mutex::new(SeatMap::new()));
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// Store unimplemented seats so we can implement them when the data device manager is implemented
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let data_device_manager = Arc::new(Mutex::new(None));
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let mut unimplemented_seats = Vec::new();
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// Store the name of the seat that last sends an event for use as the default seat
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let last_seat_name = Arc::new(Mutex::new(String::new()));
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let data_device_manager_clone = data_device_manager.clone();
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let seat_map_clone = seat_map.clone();
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let last_seat_name_clone = last_seat_name.clone();
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// Register wl_seat objects and wl_data_device_manager
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GlobalManager::new_with_cb(&display, move |event, reg| {
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if let GlobalEvent::New {
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id,
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ref interface,
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version,
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} = event
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{
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if "wl_seat" == interface.as_str() && version >= 2 {
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if let Some(ref data_device_manager) =
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data_device_manager_clone.lock().unwrap().deref()
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{
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// Implement the seat
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implement_seat(
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id,
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version,
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seat_map_clone.clone(),
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last_seat_name_clone.clone(),
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data_device_manager,
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®,
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);
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} else {
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// Store the seat for implementation once wl_data_device_manager is registered
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unimplemented_seats.push((id, version));
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}
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} else if "wl_data_device_manager" == interface.as_str() {
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// Register the wl_data_device_manager
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*data_device_manager_clone.lock().unwrap() = Some(
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reg.bind::<wl_data_device_manager::WlDataDeviceManager, _>(
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version,
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id,
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NewProxy::implement_dummy,
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)
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.unwrap(),
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);
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// Implement the unimplemented seats
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for (id, version) in &unimplemented_seats {
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implement_seat(
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*id,
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*version,
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seat_map_clone.clone(),
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last_seat_name_clone.clone(),
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data_device_manager_clone.lock().unwrap().as_ref().unwrap(),
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®,
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);
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}
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}
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}
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});
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event_queue.sync_roundtrip().unwrap();
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// Thread loop to handle requests and dispatch the event queue
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loop {
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if let Ok(request) = request_recv.try_recv() {
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match request {
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// Load text from clipboard
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ThreadRequest::Load(seat_name) => {
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event_queue.sync_roundtrip().unwrap();
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let seat_map = seat_map.lock().unwrap().clone();
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// Get the requested seat from the seat map
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let contents = seat_map
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.get(&seat_name.unwrap_or_else(|| last_seat_name.lock().unwrap().clone()))
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.map_or(String::new(), |seat| {
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let mut reader = None;
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seat.0.lock().unwrap().with_selection(|offer| {
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if let Some(offer) = offer {
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offer.with_mime_types(|types| {
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if types.contains(&"text/plain;charset=utf-8".to_string()) {
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reader = Some(
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offer
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.receive("text/plain;charset=utf-8".into())
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.unwrap(),
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);
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}
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});
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}
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});
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event_queue.sync_roundtrip().unwrap();
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reader.map_or(String::new(), |mut reader| {
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let mut contents = String::new();
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reader.read_to_string(&mut contents).unwrap();
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contents
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})
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});
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load_send.send(contents).unwrap();
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}
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// Store text in the clipboard
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ThreadRequest::Store(seat_name, contents) => {
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event_queue.sync_roundtrip().unwrap();
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let seat_map = seat_map.lock().unwrap().clone();
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// Get the requested seat from the seat map
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if let Some((device, enter_serial)) = seat_map
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.get(&seat_name.unwrap_or_else(|| last_seat_name.lock().unwrap().clone()))
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{
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let data_source = DataSource::new(
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data_device_manager.lock().unwrap().as_ref().unwrap(),
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&["text/plain;charset=utf-8"],
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move |source_event| {
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if let DataSourceEvent::Send { mut pipe, .. } = source_event {
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write!(pipe, "{}", contents).unwrap();
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}
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},
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);
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device
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.lock()
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.unwrap()
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.set_selection(&Some(data_source), *enter_serial);
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event_queue.sync_roundtrip().unwrap();
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}
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}
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ThreadRequest::Kill => break,
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}
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}
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// Dispatch the event queue and block for 50 milliseconds
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event_queue.dispatch_pending().unwrap();
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sleep(Duration::from_millis(50));
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}
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}
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/// Implement seats that we register
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fn implement_seat(
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id: u32,
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version: u32,
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seat_map: Arc<Mutex<SeatMap>>,
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last_seat_name: Arc<Mutex<String>>,
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data_device_manager: &wl_data_device_manager::WlDataDeviceManager,
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reg: &wl_registry::WlRegistry,
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) {
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let seat_name = Arc::new(Mutex::new(String::new()));
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let seat_name_clone = seat_name.clone();
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// Register the seat
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let seat = reg
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.bind::<wl_seat::WlSeat, _>(version, id, move |proxy| {
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proxy.implement_closure(
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move |event, _| {
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if let wl_seat::Event::Name { name } = event {
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*seat_name_clone.lock().unwrap() = name
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}
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},
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(),
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)
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})
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.unwrap();
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// Create a device for the seat
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let device = Arc::new(Mutex::new(DataDevice::init_for_seat(
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data_device_manager,
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&seat,
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)));
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let seat_map_clone = seat_map.clone();
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let device_clone = device.clone();
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let seat_name_clone = seat_name.clone();
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let last_seat_name_clone = last_seat_name.clone();
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map_keyboard_auto(&seat, move |event, _| {
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// Set this seat as the last to send an event
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*last_seat_name_clone.lock().unwrap() = seat_name_clone.lock().unwrap().clone();
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// Get serials from recieved events from the seat keyboard
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match event {
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KbEvent::Enter { serial, .. } => {
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seat_map_clone.lock().unwrap().insert(
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seat_name_clone.lock().unwrap().clone(),
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(device_clone.clone(), serial),
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);
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}
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KbEvent::Key { serial, .. } => {
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seat_map_clone.lock().unwrap().insert(
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seat_name_clone.lock().unwrap().clone(),
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(device_clone.clone(), serial),
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);
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}
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KbEvent::Leave { .. } => {
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seat_map_clone
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.lock()
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.unwrap()
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.remove(&*seat_name_clone.lock().unwrap());
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}
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_ => {}
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}
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})
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.unwrap();
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seat.get_pointer(|pointer| {
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pointer.implement_closure(
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move |evt, _| {
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// Set this seat as the last to send an event
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*last_seat_name.lock().unwrap() = seat_name.lock().unwrap().clone();
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// Get serials from recieved events from the seat pointer
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match evt {
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PtrEvent::Enter { serial, .. } => {
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seat_map
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.lock()
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.unwrap()
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.insert(seat_name.lock().unwrap().clone(), (device.clone(), serial));
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}
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PtrEvent::Button { serial, .. } => {
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seat_map
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.lock()
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.unwrap()
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.insert(seat_name.lock().unwrap().clone(), (device.clone(), serial));
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}
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PtrEvent::Leave { .. } => {
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seat_map.lock().unwrap().remove(&*seat_name.lock().unwrap());
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}
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_ => {}
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}
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},
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(),
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)
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})
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.unwrap();
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}
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