1use std::cell::RefCell;
2use std::ffi::OsString;
3use std::ops::Deref;
4use std::rc::{Rc, Weak};
5use std::time::{Duration, Instant};
6
7use calloop::generic::{FdWrapper, Generic};
8use calloop::{EventLoop, LoopHandle, RegistrationToken};
9
10use collections::HashMap;
11use copypasta::x11_clipboard::{Clipboard, Primary, X11ClipboardContext};
12use copypasta::ClipboardProvider;
13
14use util::ResultExt;
15use x11rb::connection::{Connection, RequestConnection};
16use x11rb::cursor;
17use x11rb::errors::ConnectionError;
18use x11rb::protocol::randr::ConnectionExt as _;
19use x11rb::protocol::xinput::ConnectionExt;
20use x11rb::protocol::xkb::ConnectionExt as _;
21use x11rb::protocol::xproto::{ChangeWindowAttributesAux, ConnectionExt as _};
22use x11rb::protocol::{randr, render, xinput, xkb, xproto, Event};
23use x11rb::resource_manager::Database;
24use x11rb::xcb_ffi::XCBConnection;
25use xim::{x11rb::X11rbClient, Client};
26use xim::{AttributeName, InputStyle};
27use xkbc::x11::ffi::{XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION};
28use xkbcommon::xkb as xkbc;
29
30use crate::platform::linux::LinuxClient;
31use crate::platform::{LinuxCommon, PlatformWindow};
32use crate::{
33 modifiers_from_xinput_info, point, px, AnyWindowHandle, Bounds, CursorStyle, DisplayId,
34 Keystroke, Modifiers, ModifiersChangedEvent, Pixels, PlatformDisplay, PlatformInput, Point,
35 ScrollDelta, Size, TouchPhase, WindowParams, X11Window,
36};
37
38use super::{
39 super::{open_uri_internal, SCROLL_LINES},
40 X11Display, X11WindowStatePtr, XcbAtoms,
41};
42use super::{button_of_key, modifiers_from_state, pressed_button_from_mask};
43use super::{XimCallbackEvent, XimHandler};
44use crate::platform::linux::is_within_click_distance;
45use crate::platform::linux::platform::DOUBLE_CLICK_INTERVAL;
46use crate::platform::linux::xdg_desktop_portal::{Event as XDPEvent, XDPEventSource};
47
48pub(super) const XINPUT_MASTER_DEVICE: u16 = 1;
49
50pub(crate) struct WindowRef {
51 window: X11WindowStatePtr,
52 refresh_event_token: RegistrationToken,
53}
54
55impl WindowRef {
56 pub fn handle(&self) -> AnyWindowHandle {
57 self.window.state.borrow().handle
58 }
59}
60
61impl Deref for WindowRef {
62 type Target = X11WindowStatePtr;
63
64 fn deref(&self) -> &Self::Target {
65 &self.window
66 }
67}
68
69#[derive(Debug)]
70#[non_exhaustive]
71pub enum EventHandlerError {
72 XCBConnectionError(ConnectionError),
73 XIMClientError(xim::ClientError),
74}
75
76impl std::error::Error for EventHandlerError {}
77
78impl std::fmt::Display for EventHandlerError {
79 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
80 match self {
81 EventHandlerError::XCBConnectionError(err) => err.fmt(f),
82 EventHandlerError::XIMClientError(err) => err.fmt(f),
83 }
84 }
85}
86
87impl From<ConnectionError> for EventHandlerError {
88 fn from(err: ConnectionError) -> Self {
89 EventHandlerError::XCBConnectionError(err)
90 }
91}
92
93impl From<xim::ClientError> for EventHandlerError {
94 fn from(err: xim::ClientError) -> Self {
95 EventHandlerError::XIMClientError(err)
96 }
97}
98
99pub struct X11ClientState {
100 pub(crate) loop_handle: LoopHandle<'static, X11Client>,
101 pub(crate) event_loop: Option<calloop::EventLoop<'static, X11Client>>,
102
103 pub(crate) last_click: Instant,
104 pub(crate) last_location: Point<Pixels>,
105 pub(crate) current_count: usize,
106
107 pub(crate) scale_factor: f32,
108
109 pub(crate) xcb_connection: Rc<XCBConnection>,
110 pub(crate) x_root_index: usize,
111 pub(crate) _resource_database: Database,
112 pub(crate) atoms: XcbAtoms,
113 pub(crate) windows: HashMap<xproto::Window, WindowRef>,
114 pub(crate) focused_window: Option<xproto::Window>,
115 pub(crate) xkb: xkbc::State,
116 pub(crate) ximc: Option<X11rbClient<Rc<XCBConnection>>>,
117 pub(crate) xim_handler: Option<XimHandler>,
118 pub modifiers: Modifiers,
119
120 pub(crate) compose_state: xkbc::compose::State,
121 pub(crate) pre_edit_text: Option<String>,
122 pub(crate) composing: bool,
123 pub(crate) cursor_handle: cursor::Handle,
124 pub(crate) cursor_styles: HashMap<xproto::Window, CursorStyle>,
125 pub(crate) cursor_cache: HashMap<CursorStyle, xproto::Cursor>,
126
127 pub(crate) scroll_class_data: Vec<xinput::DeviceClassDataScroll>,
128 pub(crate) scroll_x: Option<f32>,
129 pub(crate) scroll_y: Option<f32>,
130
131 pub(crate) common: LinuxCommon,
132 pub(crate) clipboard: X11ClipboardContext<Clipboard>,
133 pub(crate) primary: X11ClipboardContext<Primary>,
134}
135
136#[derive(Clone)]
137pub struct X11ClientStatePtr(pub Weak<RefCell<X11ClientState>>);
138
139impl X11ClientStatePtr {
140 pub fn drop_window(&self, x_window: u32) {
141 let client = X11Client(self.0.upgrade().expect("client already dropped"));
142 let mut state = client.0.borrow_mut();
143
144 if let Some(window_ref) = state.windows.remove(&x_window) {
145 state.loop_handle.remove(window_ref.refresh_event_token);
146 }
147
148 state.cursor_styles.remove(&x_window);
149
150 if state.windows.is_empty() {
151 state.common.signal.stop();
152 }
153 }
154}
155
156#[derive(Clone)]
157pub(crate) struct X11Client(Rc<RefCell<X11ClientState>>);
158
159impl X11Client {
160 pub(crate) fn new() -> Self {
161 let event_loop = EventLoop::try_new().unwrap();
162
163 let (common, main_receiver) = LinuxCommon::new(event_loop.get_signal());
164
165 let handle = event_loop.handle();
166
167 handle
168 .insert_source(main_receiver, {
169 let handle = handle.clone();
170 move |event, _, _: &mut X11Client| {
171 if let calloop::channel::Event::Msg(runnable) = event {
172 // Insert the runnables as idle callbacks, so we make sure that user-input and X11
173 // events have higher priority and runnables are only worked off after the event
174 // callbacks.
175 handle.insert_idle(|_| {
176 runnable.run();
177 });
178 }
179 }
180 })
181 .unwrap();
182
183 let (xcb_connection, x_root_index) = XCBConnection::connect(None).unwrap();
184 xcb_connection
185 .prefetch_extension_information(xkb::X11_EXTENSION_NAME)
186 .unwrap();
187 xcb_connection
188 .prefetch_extension_information(randr::X11_EXTENSION_NAME)
189 .unwrap();
190 xcb_connection
191 .prefetch_extension_information(render::X11_EXTENSION_NAME)
192 .unwrap();
193 xcb_connection
194 .prefetch_extension_information(xinput::X11_EXTENSION_NAME)
195 .unwrap();
196
197 let xinput_version = xcb_connection
198 .xinput_xi_query_version(2, 0)
199 .unwrap()
200 .reply()
201 .unwrap();
202 assert!(
203 xinput_version.major_version >= 2,
204 "XInput Extension v2 not supported."
205 );
206
207 let master_device_query = xcb_connection
208 .xinput_xi_query_device(XINPUT_MASTER_DEVICE)
209 .unwrap()
210 .reply()
211 .unwrap();
212 let scroll_class_data = master_device_query
213 .infos
214 .iter()
215 .find(|info| info.type_ == xinput::DeviceType::MASTER_POINTER)
216 .unwrap()
217 .classes
218 .iter()
219 .filter_map(|class| class.data.as_scroll())
220 .map(|class| *class)
221 .collect::<Vec<_>>();
222
223 let atoms = XcbAtoms::new(&xcb_connection).unwrap();
224 let xkb = xcb_connection
225 .xkb_use_extension(XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION)
226 .unwrap();
227
228 let atoms = atoms.reply().unwrap();
229 let xkb = xkb.reply().unwrap();
230 let events = xkb::EventType::STATE_NOTIFY;
231 xcb_connection
232 .xkb_select_events(
233 xkb::ID::USE_CORE_KBD.into(),
234 0u8.into(),
235 events,
236 0u8.into(),
237 0u8.into(),
238 &xkb::SelectEventsAux::new(),
239 )
240 .unwrap();
241 assert!(xkb.supported);
242
243 let xkb_context = xkbc::Context::new(xkbc::CONTEXT_NO_FLAGS);
244 let xkb_state = {
245 let xkb_device_id = xkbc::x11::get_core_keyboard_device_id(&xcb_connection);
246 let xkb_keymap = xkbc::x11::keymap_new_from_device(
247 &xkb_context,
248 &xcb_connection,
249 xkb_device_id,
250 xkbc::KEYMAP_COMPILE_NO_FLAGS,
251 );
252 xkbc::x11::state_new_from_device(&xkb_keymap, &xcb_connection, xkb_device_id)
253 };
254 let compose_state = {
255 let locale = std::env::var_os("LC_CTYPE").unwrap_or(OsString::from("C"));
256 let table = xkbc::compose::Table::new_from_locale(
257 &xkb_context,
258 &locale,
259 xkbc::compose::COMPILE_NO_FLAGS,
260 )
261 .log_err()
262 .unwrap();
263 xkbc::compose::State::new(&table, xkbc::compose::STATE_NO_FLAGS)
264 };
265
266 let resource_database = x11rb::resource_manager::new_from_default(&xcb_connection).unwrap();
267
268 let scale_factor = resource_database
269 .get_value("Xft.dpi", "Xft.dpi")
270 .ok()
271 .flatten()
272 .map(|dpi: f32| dpi / 96.0)
273 .unwrap_or(1.0);
274
275 let cursor_handle = cursor::Handle::new(&xcb_connection, x_root_index, &resource_database)
276 .unwrap()
277 .reply()
278 .unwrap();
279
280 let clipboard = X11ClipboardContext::<Clipboard>::new().unwrap();
281 let primary = X11ClipboardContext::<Primary>::new().unwrap();
282
283 let xcb_connection = Rc::new(xcb_connection);
284
285 let ximc = X11rbClient::init(Rc::clone(&xcb_connection), x_root_index, None).ok();
286 let xim_handler = if ximc.is_some() {
287 Some(XimHandler::new())
288 } else {
289 None
290 };
291
292 // Safety: Safe if xcb::Connection always returns a valid fd
293 let fd = unsafe { FdWrapper::new(Rc::clone(&xcb_connection)) };
294
295 handle
296 .insert_source(
297 Generic::new_with_error::<EventHandlerError>(
298 fd,
299 calloop::Interest::READ,
300 calloop::Mode::Level,
301 ),
302 {
303 let xcb_connection = xcb_connection.clone();
304 move |_readiness, _, client| {
305 while let Some(event) = xcb_connection.poll_for_event()? {
306 let mut state = client.0.borrow_mut();
307 if state.ximc.is_none() || state.xim_handler.is_none() {
308 drop(state);
309 client.handle_event(event);
310 continue;
311 }
312
313 let mut ximc = state.ximc.take().unwrap();
314 let mut xim_handler = state.xim_handler.take().unwrap();
315 let xim_connected = xim_handler.connected;
316 drop(state);
317
318 let xim_filtered = match ximc.filter_event(&event, &mut xim_handler) {
319 Ok(handled) => handled,
320 Err(err) => {
321 log::error!("XIMClientError: {}", err);
322 false
323 }
324 };
325 let xim_callback_event = xim_handler.last_callback_event.take();
326
327 let mut state = client.0.borrow_mut();
328 state.ximc = Some(ximc);
329 state.xim_handler = Some(xim_handler);
330 drop(state);
331
332 if let Some(event) = xim_callback_event {
333 client.handle_xim_callback_event(event);
334 }
335
336 if xim_filtered {
337 continue;
338 }
339
340 if xim_connected {
341 client.xim_handle_event(event);
342 } else {
343 client.handle_event(event);
344 }
345 }
346
347 Ok(calloop::PostAction::Continue)
348 }
349 },
350 )
351 .expect("Failed to initialize x11 event source");
352
353 handle
354 .insert_source(XDPEventSource::new(&common.background_executor), {
355 move |event, _, client| match event {
356 XDPEvent::WindowAppearance(appearance) => {
357 client.with_common(|common| common.appearance = appearance);
358 for (_, window) in &mut client.0.borrow_mut().windows {
359 window.window.set_appearance(appearance);
360 }
361 }
362 }
363 })
364 .unwrap();
365
366 X11Client(Rc::new(RefCell::new(X11ClientState {
367 modifiers: Modifiers::default(),
368 event_loop: Some(event_loop),
369 loop_handle: handle,
370 common,
371 last_click: Instant::now(),
372 last_location: Point::new(px(0.0), px(0.0)),
373 current_count: 0,
374 scale_factor,
375
376 xcb_connection,
377 x_root_index,
378 _resource_database: resource_database,
379 atoms,
380 windows: HashMap::default(),
381 focused_window: None,
382 xkb: xkb_state,
383 ximc,
384 xim_handler,
385
386 compose_state: compose_state,
387 pre_edit_text: None,
388 composing: false,
389
390 cursor_handle,
391 cursor_styles: HashMap::default(),
392 cursor_cache: HashMap::default(),
393
394 scroll_class_data,
395 scroll_x: None,
396 scroll_y: None,
397
398 clipboard,
399 primary,
400 })))
401 }
402
403 pub fn enable_ime(&self) {
404 let mut state = self.0.borrow_mut();
405 if state.ximc.is_none() {
406 return;
407 }
408
409 let mut ximc = state.ximc.take().unwrap();
410 let mut xim_handler = state.xim_handler.take().unwrap();
411 let mut ic_attributes = ximc
412 .build_ic_attributes()
413 .push(
414 AttributeName::InputStyle,
415 InputStyle::PREEDIT_CALLBACKS
416 | InputStyle::STATUS_NOTHING
417 | InputStyle::PREEDIT_NONE,
418 )
419 .push(AttributeName::ClientWindow, xim_handler.window)
420 .push(AttributeName::FocusWindow, xim_handler.window);
421
422 let window_id = state.focused_window;
423 drop(state);
424 if let Some(window_id) = window_id {
425 let window = self.get_window(window_id).unwrap();
426 if let Some(area) = window.get_ime_area() {
427 ic_attributes =
428 ic_attributes.nested_list(xim::AttributeName::PreeditAttributes, |b| {
429 b.push(
430 xim::AttributeName::SpotLocation,
431 xim::Point {
432 x: u32::from(area.origin.x + area.size.width) as i16,
433 y: u32::from(area.origin.y + area.size.height) as i16,
434 },
435 );
436 });
437 }
438 }
439 ximc.create_ic(xim_handler.im_id, ic_attributes.build())
440 .ok();
441 state = self.0.borrow_mut();
442 state.xim_handler = Some(xim_handler);
443 state.ximc = Some(ximc);
444 }
445
446 pub fn disable_ime(&self) {
447 let mut state = self.0.borrow_mut();
448 state.composing = false;
449 if let Some(mut ximc) = state.ximc.take() {
450 let xim_handler = state.xim_handler.as_ref().unwrap();
451 ximc.destroy_ic(xim_handler.im_id, xim_handler.ic_id).ok();
452 state.ximc = Some(ximc);
453 }
454 }
455
456 fn get_window(&self, win: xproto::Window) -> Option<X11WindowStatePtr> {
457 let state = self.0.borrow();
458 state
459 .windows
460 .get(&win)
461 .map(|window_reference| window_reference.window.clone())
462 }
463
464 fn handle_event(&self, event: Event) -> Option<()> {
465 match event {
466 Event::ClientMessage(event) => {
467 let window = self.get_window(event.window)?;
468 let [atom, ..] = event.data.as_data32();
469 let mut state = self.0.borrow_mut();
470
471 if atom == state.atoms.WM_DELETE_WINDOW {
472 // window "x" button clicked by user
473 if window.should_close() {
474 let window_ref = state.windows.remove(&event.window)?;
475 state.loop_handle.remove(window_ref.refresh_event_token);
476 // Rest of the close logic is handled in drop_window()
477 }
478 }
479 }
480 Event::ConfigureNotify(event) => {
481 let bounds = Bounds {
482 origin: Point {
483 x: event.x.into(),
484 y: event.y.into(),
485 },
486 size: Size {
487 width: event.width.into(),
488 height: event.height.into(),
489 },
490 };
491 let window = self.get_window(event.window)?;
492 window.configure(bounds);
493 }
494 Event::Expose(event) => {
495 let window = self.get_window(event.window)?;
496 window.refresh();
497 }
498 Event::FocusIn(event) => {
499 let window = self.get_window(event.event)?;
500 window.set_focused(true);
501 let mut state = self.0.borrow_mut();
502 state.focused_window = Some(event.event);
503 drop(state);
504 self.enable_ime();
505 }
506 Event::FocusOut(event) => {
507 let window = self.get_window(event.event)?;
508 window.set_focused(false);
509 let mut state = self.0.borrow_mut();
510 state.focused_window = None;
511 state.compose_state.reset();
512 state.pre_edit_text.take();
513 drop(state);
514 self.disable_ime();
515 window.handle_ime_delete();
516 }
517 Event::XkbStateNotify(event) => {
518 let mut state = self.0.borrow_mut();
519 state.xkb.update_mask(
520 event.base_mods.into(),
521 event.latched_mods.into(),
522 event.locked_mods.into(),
523 0,
524 0,
525 event.locked_group.into(),
526 );
527
528 let modifiers = Modifiers::from_xkb(&state.xkb);
529 if state.modifiers == modifiers {
530 drop(state);
531 } else {
532 let focused_window_id = state.focused_window?;
533 state.modifiers = modifiers;
534 drop(state);
535
536 let focused_window = self.get_window(focused_window_id)?;
537 focused_window.handle_input(PlatformInput::ModifiersChanged(
538 ModifiersChangedEvent { modifiers },
539 ));
540 }
541 }
542 Event::KeyPress(event) => {
543 let window = self.get_window(event.event)?;
544 let mut state = self.0.borrow_mut();
545
546 let modifiers = modifiers_from_state(event.state);
547 state.modifiers = modifiers;
548
549 let keystroke = {
550 let code = event.detail.into();
551 let mut keystroke = crate::Keystroke::from_xkb(&state.xkb, modifiers, code);
552 state.xkb.update_key(code, xkbc::KeyDirection::Down);
553 let keysym = state.xkb.key_get_one_sym(code);
554 if keysym.is_modifier_key() {
555 return Some(());
556 }
557 state.compose_state.feed(keysym);
558 match state.compose_state.status() {
559 xkbc::Status::Composed => {
560 state.pre_edit_text.take();
561 keystroke.ime_key = state.compose_state.utf8();
562 keystroke.key =
563 xkbc::keysym_get_name(state.compose_state.keysym().unwrap());
564 }
565 xkbc::Status::Composing => {
566 state.pre_edit_text = state
567 .compose_state
568 .utf8()
569 .or(crate::Keystroke::underlying_dead_key(keysym));
570 let pre_edit = state.pre_edit_text.clone().unwrap_or(String::default());
571 drop(state);
572 window.handle_ime_preedit(pre_edit);
573 state = self.0.borrow_mut();
574 }
575 xkbc::Status::Cancelled => {
576 let pre_edit = state.pre_edit_text.take();
577 drop(state);
578 if let Some(pre_edit) = pre_edit {
579 window.handle_ime_commit(pre_edit);
580 }
581 if let Some(current_key) = Keystroke::underlying_dead_key(keysym) {
582 window.handle_ime_preedit(current_key);
583 }
584 state = self.0.borrow_mut();
585 state.compose_state.feed(keysym);
586 }
587 _ => {}
588 }
589 keystroke
590 };
591 drop(state);
592 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
593 keystroke,
594 is_held: false,
595 }));
596 }
597 Event::KeyRelease(event) => {
598 let window = self.get_window(event.event)?;
599 let mut state = self.0.borrow_mut();
600
601 let modifiers = modifiers_from_state(event.state);
602 state.modifiers = modifiers;
603
604 let keystroke = {
605 let code = event.detail.into();
606 let keystroke = crate::Keystroke::from_xkb(&state.xkb, modifiers, code);
607 state.xkb.update_key(code, xkbc::KeyDirection::Up);
608 let keysym = state.xkb.key_get_one_sym(code);
609 if keysym.is_modifier_key() {
610 return Some(());
611 }
612 keystroke
613 };
614 drop(state);
615 window.handle_input(PlatformInput::KeyUp(crate::KeyUpEvent { keystroke }));
616 }
617 Event::XinputButtonPress(event) => {
618 let window = self.get_window(event.event)?;
619 let mut state = self.0.borrow_mut();
620
621 let modifiers = modifiers_from_xinput_info(event.mods);
622 state.modifiers = modifiers;
623
624 let position = point(
625 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
626 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
627 );
628
629 if state.composing && state.ximc.is_some() {
630 drop(state);
631 self.disable_ime();
632 self.enable_ime();
633 window.handle_ime_unmark();
634 state = self.0.borrow_mut();
635 } else if let Some(text) = state.pre_edit_text.take() {
636 state.compose_state.reset();
637 drop(state);
638 window.handle_ime_commit(text);
639 state = self.0.borrow_mut();
640 }
641 if let Some(button) = button_of_key(event.detail.try_into().unwrap()) {
642 let click_elapsed = state.last_click.elapsed();
643
644 if click_elapsed < DOUBLE_CLICK_INTERVAL
645 && is_within_click_distance(state.last_location, position)
646 {
647 state.current_count += 1;
648 } else {
649 state.current_count = 1;
650 }
651
652 state.last_click = Instant::now();
653 state.last_location = position;
654 let current_count = state.current_count;
655
656 drop(state);
657 window.handle_input(PlatformInput::MouseDown(crate::MouseDownEvent {
658 button,
659 position,
660 modifiers,
661 click_count: current_count,
662 first_mouse: false,
663 }));
664 } else {
665 log::warn!("Unknown button press: {event:?}");
666 }
667 }
668 Event::XinputButtonRelease(event) => {
669 let window = self.get_window(event.event)?;
670 let mut state = self.0.borrow_mut();
671 let modifiers = modifiers_from_xinput_info(event.mods);
672 state.modifiers = modifiers;
673
674 let position = point(
675 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
676 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
677 );
678 if let Some(button) = button_of_key(event.detail.try_into().unwrap()) {
679 let click_count = state.current_count;
680 drop(state);
681 window.handle_input(PlatformInput::MouseUp(crate::MouseUpEvent {
682 button,
683 position,
684 modifiers,
685 click_count,
686 }));
687 }
688 }
689 Event::XinputMotion(event) => {
690 let window = self.get_window(event.event)?;
691 let mut state = self.0.borrow_mut();
692 let pressed_button = pressed_button_from_mask(event.button_mask[0]);
693 let position = point(
694 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
695 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
696 );
697 let modifiers = modifiers_from_xinput_info(event.mods);
698 state.modifiers = modifiers;
699 drop(state);
700
701 let axisvalues = event
702 .axisvalues
703 .iter()
704 .map(|axisvalue| fp3232_to_f32(*axisvalue))
705 .collect::<Vec<_>>();
706
707 if event.valuator_mask[0] & 3 != 0 {
708 window.handle_input(PlatformInput::MouseMove(crate::MouseMoveEvent {
709 position,
710 pressed_button,
711 modifiers,
712 }));
713 }
714
715 let mut valuator_idx = 0;
716 let scroll_class_data = self.0.borrow().scroll_class_data.clone();
717 for shift in 0..32 {
718 if (event.valuator_mask[0] >> shift) & 1 == 0 {
719 continue;
720 }
721
722 for scroll_class in &scroll_class_data {
723 if scroll_class.scroll_type == xinput::ScrollType::HORIZONTAL
724 && scroll_class.number == shift
725 {
726 let new_scroll = axisvalues[valuator_idx]
727 / fp3232_to_f32(scroll_class.increment)
728 * SCROLL_LINES as f32;
729 let old_scroll = self.0.borrow().scroll_x;
730 self.0.borrow_mut().scroll_x = Some(new_scroll);
731
732 if let Some(old_scroll) = old_scroll {
733 let delta_scroll = old_scroll - new_scroll;
734 window.handle_input(PlatformInput::ScrollWheel(
735 crate::ScrollWheelEvent {
736 position,
737 delta: ScrollDelta::Lines(Point::new(delta_scroll, 0.0)),
738 modifiers,
739 touch_phase: TouchPhase::default(),
740 },
741 ));
742 }
743 } else if scroll_class.scroll_type == xinput::ScrollType::VERTICAL
744 && scroll_class.number == shift
745 {
746 // the `increment` is the valuator delta equivalent to one positive unit of scrolling. Here that means SCROLL_LINES lines.
747 let new_scroll = axisvalues[valuator_idx]
748 / fp3232_to_f32(scroll_class.increment)
749 * SCROLL_LINES as f32;
750 let old_scroll = self.0.borrow().scroll_y;
751 self.0.borrow_mut().scroll_y = Some(new_scroll);
752
753 if let Some(old_scroll) = old_scroll {
754 let delta_scroll = old_scroll - new_scroll;
755 window.handle_input(PlatformInput::ScrollWheel(
756 crate::ScrollWheelEvent {
757 position,
758 delta: ScrollDelta::Lines(Point::new(0.0, delta_scroll)),
759 modifiers,
760 touch_phase: TouchPhase::default(),
761 },
762 ));
763 }
764 }
765 }
766
767 valuator_idx += 1;
768 }
769 }
770 Event::XinputLeave(event) if event.mode == xinput::NotifyMode::NORMAL => {
771 self.0.borrow_mut().scroll_x = None; // Set last scroll to `None` so that a large delta isn't created if scrolling is done outside the window (the valuator is global)
772 self.0.borrow_mut().scroll_y = None;
773
774 let window = self.get_window(event.event)?;
775 let mut state = self.0.borrow_mut();
776 let pressed_button = pressed_button_from_mask(event.buttons[0]);
777 let position = point(
778 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
779 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
780 );
781 let modifiers = modifiers_from_xinput_info(event.mods);
782 state.modifiers = modifiers;
783 drop(state);
784
785 window.handle_input(PlatformInput::MouseExited(crate::MouseExitEvent {
786 pressed_button,
787 position,
788 modifiers,
789 }));
790 }
791 _ => {}
792 };
793
794 Some(())
795 }
796
797 fn handle_xim_callback_event(&self, event: XimCallbackEvent) {
798 match event {
799 XimCallbackEvent::XimXEvent(event) => {
800 self.handle_event(event);
801 }
802 XimCallbackEvent::XimCommitEvent(window, text) => {
803 self.xim_handle_commit(window, text);
804 }
805 XimCallbackEvent::XimPreeditEvent(window, text) => {
806 self.xim_handle_preedit(window, text);
807 }
808 };
809 }
810
811 fn xim_handle_event(&self, event: Event) -> Option<()> {
812 match event {
813 Event::KeyPress(event) | Event::KeyRelease(event) => {
814 let mut state = self.0.borrow_mut();
815 let mut ximc = state.ximc.take().unwrap();
816 let mut xim_handler = state.xim_handler.take().unwrap();
817 drop(state);
818 xim_handler.window = event.event;
819 ximc.forward_event(
820 xim_handler.im_id,
821 xim_handler.ic_id,
822 xim::ForwardEventFlag::empty(),
823 &event,
824 )
825 .unwrap();
826 let mut state = self.0.borrow_mut();
827 state.ximc = Some(ximc);
828 state.xim_handler = Some(xim_handler);
829 drop(state);
830 }
831 event => {
832 self.handle_event(event);
833 }
834 }
835 Some(())
836 }
837
838 fn xim_handle_commit(&self, window: xproto::Window, text: String) -> Option<()> {
839 let window = self.get_window(window).unwrap();
840 let mut state = self.0.borrow_mut();
841 state.composing = false;
842 drop(state);
843
844 window.handle_ime_commit(text);
845 Some(())
846 }
847
848 fn xim_handle_preedit(&self, window: xproto::Window, text: String) -> Option<()> {
849 let window = self.get_window(window).unwrap();
850 window.handle_ime_preedit(text);
851
852 let mut state = self.0.borrow_mut();
853 let mut ximc = state.ximc.take().unwrap();
854 let mut xim_handler = state.xim_handler.take().unwrap();
855 state.composing = true;
856 drop(state);
857
858 if let Some(area) = window.get_ime_area() {
859 let ic_attributes = ximc
860 .build_ic_attributes()
861 .push(
862 xim::AttributeName::InputStyle,
863 xim::InputStyle::PREEDIT_CALLBACKS
864 | xim::InputStyle::STATUS_NOTHING
865 | xim::InputStyle::PREEDIT_POSITION,
866 )
867 .push(xim::AttributeName::ClientWindow, xim_handler.window)
868 .push(xim::AttributeName::FocusWindow, xim_handler.window)
869 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
870 b.push(
871 xim::AttributeName::SpotLocation,
872 xim::Point {
873 x: u32::from(area.origin.x + area.size.width) as i16,
874 y: u32::from(area.origin.y + area.size.height) as i16,
875 },
876 );
877 })
878 .build();
879 ximc.set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
880 .ok();
881 }
882 let mut state = self.0.borrow_mut();
883 state.ximc = Some(ximc);
884 state.xim_handler = Some(xim_handler);
885 drop(state);
886 Some(())
887 }
888}
889
890impl LinuxClient for X11Client {
891 fn with_common<R>(&self, f: impl FnOnce(&mut LinuxCommon) -> R) -> R {
892 f(&mut self.0.borrow_mut().common)
893 }
894
895 fn displays(&self) -> Vec<Rc<dyn PlatformDisplay>> {
896 let state = self.0.borrow();
897 let setup = state.xcb_connection.setup();
898 setup
899 .roots
900 .iter()
901 .enumerate()
902 .filter_map(|(root_id, _)| {
903 Some(Rc::new(X11Display::new(&state.xcb_connection, root_id)?)
904 as Rc<dyn PlatformDisplay>)
905 })
906 .collect()
907 }
908
909 fn primary_display(&self) -> Option<Rc<dyn PlatformDisplay>> {
910 let state = self.0.borrow();
911
912 Some(Rc::new(
913 X11Display::new(&state.xcb_connection, state.x_root_index)
914 .expect("There should always be a root index"),
915 ))
916 }
917
918 fn display(&self, id: DisplayId) -> Option<Rc<dyn PlatformDisplay>> {
919 let state = self.0.borrow();
920
921 Some(Rc::new(X11Display::new(
922 &state.xcb_connection,
923 id.0 as usize,
924 )?))
925 }
926
927 fn open_window(
928 &self,
929 handle: AnyWindowHandle,
930 params: WindowParams,
931 ) -> Box<dyn PlatformWindow> {
932 let mut state = self.0.borrow_mut();
933 let x_window = state.xcb_connection.generate_id().unwrap();
934
935 let window = X11Window::new(
936 handle,
937 X11ClientStatePtr(Rc::downgrade(&self.0)),
938 state.common.foreground_executor.clone(),
939 params,
940 &state.xcb_connection,
941 state.x_root_index,
942 x_window,
943 &state.atoms,
944 state.scale_factor,
945 state.common.appearance,
946 );
947
948 let screen_resources = state
949 .xcb_connection
950 .randr_get_screen_resources(x_window)
951 .unwrap()
952 .reply()
953 .expect("Could not find available screens");
954
955 let mode = screen_resources
956 .crtcs
957 .iter()
958 .find_map(|crtc| {
959 let crtc_info = state
960 .xcb_connection
961 .randr_get_crtc_info(*crtc, x11rb::CURRENT_TIME)
962 .ok()?
963 .reply()
964 .ok()?;
965
966 screen_resources
967 .modes
968 .iter()
969 .find(|m| m.id == crtc_info.mode)
970 })
971 .expect("Unable to find screen refresh rate");
972
973 let refresh_event_token = state
974 .loop_handle
975 .insert_source(calloop::timer::Timer::immediate(), {
976 let refresh_duration = mode_refresh_rate(mode);
977 move |mut instant, (), client| {
978 let state = client.0.borrow_mut();
979 state
980 .xcb_connection
981 .send_event(
982 false,
983 x_window,
984 xproto::EventMask::EXPOSURE,
985 xproto::ExposeEvent {
986 response_type: xproto::EXPOSE_EVENT,
987 sequence: 0,
988 window: x_window,
989 x: 0,
990 y: 0,
991 width: 0,
992 height: 0,
993 count: 1,
994 },
995 )
996 .unwrap();
997 let _ = state.xcb_connection.flush().unwrap();
998 // Take into account that some frames have been skipped
999 let now = Instant::now();
1000 while instant < now {
1001 instant += refresh_duration;
1002 }
1003 calloop::timer::TimeoutAction::ToInstant(instant)
1004 }
1005 })
1006 .expect("Failed to initialize refresh timer");
1007
1008 let window_ref = WindowRef {
1009 window: window.0.clone(),
1010 refresh_event_token,
1011 };
1012
1013 state.windows.insert(x_window, window_ref);
1014 Box::new(window)
1015 }
1016
1017 fn set_cursor_style(&self, style: CursorStyle) {
1018 let mut state = self.0.borrow_mut();
1019 let Some(focused_window) = state.focused_window else {
1020 return;
1021 };
1022 let current_style = state
1023 .cursor_styles
1024 .get(&focused_window)
1025 .unwrap_or(&CursorStyle::Arrow);
1026 if *current_style == style {
1027 return;
1028 }
1029
1030 let cursor = match state.cursor_cache.get(&style) {
1031 Some(cursor) => *cursor,
1032 None => {
1033 let cursor = state
1034 .cursor_handle
1035 .load_cursor(&state.xcb_connection, &style.to_icon_name())
1036 .expect("failed to load cursor");
1037 state.cursor_cache.insert(style, cursor);
1038 cursor
1039 }
1040 };
1041
1042 state.cursor_styles.insert(focused_window, style);
1043 state
1044 .xcb_connection
1045 .change_window_attributes(
1046 focused_window,
1047 &ChangeWindowAttributesAux {
1048 cursor: Some(cursor),
1049 ..Default::default()
1050 },
1051 )
1052 .expect("failed to change window cursor");
1053 }
1054
1055 fn open_uri(&self, uri: &str) {
1056 open_uri_internal(uri, None);
1057 }
1058
1059 fn write_to_primary(&self, item: crate::ClipboardItem) {
1060 self.0.borrow_mut().primary.set_contents(item.text).ok();
1061 }
1062
1063 fn write_to_clipboard(&self, item: crate::ClipboardItem) {
1064 self.0.borrow_mut().clipboard.set_contents(item.text).ok();
1065 }
1066
1067 fn read_from_primary(&self) -> Option<crate::ClipboardItem> {
1068 self.0
1069 .borrow_mut()
1070 .primary
1071 .get_contents()
1072 .ok()
1073 .map(|text| crate::ClipboardItem {
1074 text,
1075 metadata: None,
1076 })
1077 }
1078
1079 fn read_from_clipboard(&self) -> Option<crate::ClipboardItem> {
1080 self.0
1081 .borrow_mut()
1082 .clipboard
1083 .get_contents()
1084 .ok()
1085 .map(|text| crate::ClipboardItem {
1086 text,
1087 metadata: None,
1088 })
1089 }
1090
1091 fn run(&self) {
1092 let mut event_loop = self
1093 .0
1094 .borrow_mut()
1095 .event_loop
1096 .take()
1097 .expect("App is already running");
1098
1099 event_loop.run(None, &mut self.clone(), |_| {}).log_err();
1100 }
1101
1102 fn active_window(&self) -> Option<AnyWindowHandle> {
1103 let state = self.0.borrow();
1104 state.focused_window.and_then(|focused_window| {
1105 state
1106 .windows
1107 .get(&focused_window)
1108 .map(|window| window.handle())
1109 })
1110 }
1111}
1112
1113// Adatpted from:
1114// https://docs.rs/winit/0.29.11/src/winit/platform_impl/linux/x11/monitor.rs.html#103-111
1115pub fn mode_refresh_rate(mode: &randr::ModeInfo) -> Duration {
1116 let millihertz = mode.dot_clock as u64 * 1_000 / (mode.htotal as u64 * mode.vtotal as u64);
1117 let micros = 1_000_000_000 / millihertz;
1118 log::info!("Refreshing at {} micros", micros);
1119 Duration::from_micros(micros)
1120}
1121
1122fn fp3232_to_f32(value: xinput::Fp3232) -> f32 {
1123 value.integral as f32 + value.frac as f32 / u32::MAX as f32
1124}