1use crate::{
2
3 LinuxKeyboardMapper, platform::{xcb_flush, Capslock},
4 scap_screen_capture::scap_screen_sources,
5 underlying_dead_key,
6,
7};
8use core::str;
9use std::{
10 cell::RefCell,
11 collections::{BTreeMap, HashSet},
12 ops::Deref,
13 path::PathBuf,
14 rc::{Rc, Weak},
15 time::{Duration, Instant},
16};
17
18use anyhow::{anyhow, Context as _};
19use calloop::{
20 generic::{FdWrapper, Generic},
21 EventLoop, LoopHandle, RegistrationToken,
22};
23use collections::HashMap;
24use http_client::Url;
25use log::Level;
26use smallvec::SmallVec;
27use util::ResultExt;
28
29use x11rb::{
30 connection::{Connection, RequestConnection},
31 cursor,
32 errors::ConnectionError,
33 protocol::randr::ConnectionExt as _,
34 protocol::xinput::ConnectionExt,
35 protocol::xkb::ConnectionExt as _,
36 protocol::xproto::{
37 AtomEnum, ChangeWindowAttributesAux, ClientMessageData, ClientMessageEvent,
38 ConnectionExt as _, EventMask, KeyPressEvent, Visibility,
39 },
40 protocol::{randr, render, xinput, xkb, xproto, Event},
41 resource_manager::Database,
42 wrapper::ConnectionExt as _,
43 xcb_ffi::XCBConnection,
44};
45use xim::{x11rb::X11rbClient, AttributeName, Client, InputStyle};
46use xkbc::x11::ffi::{XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION};
47use xkbcommon::xkb::{self as xkbc, LayoutIndex, ModMask, State, STATE_LAYOUT_EFFECTIVE};
48
49use super::{
50 button_or_scroll_from_event_detail, check_reply,
51 clipboard::{self, Clipboard},
52 get_reply, get_valuator_axis_index, handle_connection_error, modifiers_from_state,
53 pressed_button_from_mask, ButtonOrScroll, ScrollDirection, X11Display, X11WindowStatePtr,
54 XcbAtoms, XimCallbackEvent, XimHandler,
55};
56
57use crate::platform::{
58 blade::BladeContext,
59 linux::{
60 get_xkb_compose_state, is_within_click_distance, log_cursor_icon_warning,
61 open_uri_internal,
62 platform::{DOUBLE_CLICK_INTERVAL, SCROLL_LINES},
63 reveal_path_internal,
64 xdg_desktop_portal::{Event as XDPEvent, XDPEventSource},
65 LinuxClient, DEFAULT_CURSOR_ICON_NAME,
66 },
67 LinuxCommon, PlatformWindow,
68};
69use crate::{
70 modifiers_from_xinput_info, point, px, AnyWindowHandle, Bounds, ClipboardItem, CursorStyle,
71 DisplayId, FileDropEvent, Keystroke, LinuxKeyboardLayout, Modifiers, ModifiersChangedEvent,
72 MouseButton, Pixels, Platform, PlatformDisplay, PlatformInput, PlatformKeyboardLayout, Point,
73 RequestFrameOptions, ScaledPixels, ScrollDelta, Size, TouchPhase, WindowParams, X11Window,
74};
75
76/// Value for DeviceId parameters which selects all devices.
77pub(crate) const XINPUT_ALL_DEVICES: xinput::DeviceId = 0;
78
79/// Value for DeviceId parameters which selects all device groups. Events that
80/// occur within the group are emitted by the group itself.
81///
82/// In XInput 2's interface, these are referred to as "master devices", but that
83/// terminology is both archaic and unclear.
84pub(crate) const XINPUT_ALL_DEVICE_GROUPS: xinput::DeviceId = 1;
85
86pub(crate) struct WindowRef {
87 window: X11WindowStatePtr,
88 refresh_state: Option<RefreshState>,
89 expose_event_received: bool,
90 last_visibility: Visibility,
91 is_mapped: bool,
92}
93
94impl WindowRef {
95 pub fn handle(&self) -> AnyWindowHandle {
96 self.window.state.borrow().handle
97 }
98}
99
100impl Deref for WindowRef {
101 type Target = X11WindowStatePtr;
102
103 fn deref(&self) -> &Self::Target {
104 &self.window
105 }
106}
107
108enum RefreshState {
109 Hidden {
110 refresh_rate: Duration,
111 },
112 PeriodicRefresh {
113 refresh_rate: Duration,
114 event_loop_token: RegistrationToken,
115 },
116}
117
118#[derive(Debug)]
119#[non_exhaustive]
120pub enum EventHandlerError {
121 XCBConnectionError(ConnectionError),
122 XIMClientError(xim::ClientError),
123}
124
125impl std::error::Error for EventHandlerError {}
126
127impl std::fmt::Display for EventHandlerError {
128 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
129 match self {
130 EventHandlerError::XCBConnectionError(err) => err.fmt(f),
131 EventHandlerError::XIMClientError(err) => err.fmt(f),
132 }
133 }
134}
135
136impl From<ConnectionError> for EventHandlerError {
137 fn from(err: ConnectionError) -> Self {
138 EventHandlerError::XCBConnectionError(err)
139 }
140}
141
142impl From<xim::ClientError> for EventHandlerError {
143 fn from(err: xim::ClientError) -> Self {
144 EventHandlerError::XIMClientError(err)
145 }
146}
147
148#[derive(Debug, Default, Clone)]
149struct XKBStateNotiy {
150 depressed_layout: LayoutIndex,
151 latched_layout: LayoutIndex,
152 locked_layout: LayoutIndex,
153}
154
155#[derive(Debug, Default)]
156pub struct Xdnd {
157 other_window: xproto::Window,
158 drag_type: u32,
159 retrieved: bool,
160 position: Point<Pixels>,
161}
162
163#[derive(Debug)]
164struct PointerDeviceState {
165 horizontal: ScrollAxisState,
166 vertical: ScrollAxisState,
167}
168
169#[derive(Debug, Default)]
170struct ScrollAxisState {
171 /// Valuator number for looking up this axis's scroll value.
172 valuator_number: Option<u16>,
173 /// Conversion factor from scroll units to lines.
174 multiplier: f32,
175 /// Last scroll value for calculating scroll delta.
176 ///
177 /// This gets set to `None` whenever it might be invalid - when devices change or when window focus changes.
178 /// The logic errs on the side of invalidating this, since the consequence is just skipping the delta of one scroll event.
179 /// The consequence of not invalidating it can be large invalid deltas, which are much more user visible.
180 scroll_value: Option<f32>,
181}
182
183pub struct X11ClientState {
184 pub(crate) loop_handle: LoopHandle<'static, X11Client>,
185 pub(crate) event_loop: Option<calloop::EventLoop<'static, X11Client>>,
186
187 pub(crate) last_click: Instant,
188 pub(crate) last_mouse_button: Option<MouseButton>,
189 pub(crate) last_location: Point<Pixels>,
190 pub(crate) current_count: usize,
191
192 gpu_context: BladeContext,
193
194 pub(crate) scale_factor: f32,
195
196 xkb_context: xkbc::Context,
197 pub(crate) xcb_connection: Rc<XCBConnection>,
198 xkb_device_id: i32,
199 client_side_decorations_supported: bool,
200 pub(crate) x_root_index: usize,
201 pub(crate) _resource_database: Database,
202 pub(crate) atoms: XcbAtoms,
203 pub(crate) windows: HashMap<xproto::Window, WindowRef>,
204 pub(crate) mouse_focused_window: Option<xproto::Window>,
205 pub(crate) keyboard_focused_window: Option<xproto::Window>,
206 pub(crate) xkb: State,
207 previous_xkb_state: XKBStateNotiy,
208 keyboard_layout: LinuxKeyboardLayout,
209 pub(crate) keyboard_layout: Box<LinuxKeyboardLayout>,
210 pub(crate) keyboard_mapper: Rc<LinuxKeyboardMapper>,
211 pub(crate) keyboard_mapper_cache: HashMap<String, Rc<LinuxKeyboardMapper>>,
212 pub(crate) ximc: Option<X11rbClient<Rc<XCBConnection>>>,
213 pub(crate) xim_handler: Option<XimHandler>,
214 pub modifiers: Modifiers,
215 pub capslock: Capslock,
216 // TODO: Can the other updates to `modifiers` be removed so that this is unnecessary?
217 // capslock logic was done analog to modifiers
218 pub last_modifiers_changed_event: Modifiers,
219 pub last_capslock_changed_event: Capslock,
220
221 pub(crate) compose_state: Option<xkbc::compose::State>,
222 pub(crate) pre_edit_text: Option<String>,
223 pub(crate) composing: bool,
224 pub(crate) pre_key_char_down: Option<Keystroke>,
225 pub(crate) cursor_handle: cursor::Handle,
226 pub(crate) cursor_styles: HashMap<xproto::Window, CursorStyle>,
227 pub(crate) cursor_cache: HashMap<CursorStyle, Option<xproto::Cursor>>,
228
229 pointer_device_states: BTreeMap<xinput::DeviceId, PointerDeviceState>,
230
231 pub(crate) common: LinuxCommon,
232 pub(crate) clipboard: Clipboard,
233 pub(crate) clipboard_item: Option<ClipboardItem>,
234 pub(crate) xdnd_state: Xdnd,
235}
236
237#[derive(Clone)]
238pub struct X11ClientStatePtr(pub Weak<RefCell<X11ClientState>>);
239
240impl X11ClientStatePtr {
241 fn get_client(&self) -> Option<X11Client> {
242 self.0.upgrade().map(X11Client)
243 }
244
245 pub fn drop_window(&self, x_window: u32) {
246 let Some(client) = self.get_client() else {
247 return;
248 };
249 let mut state = client.0.borrow_mut();
250
251 if let Some(window_ref) = state.windows.remove(&x_window) {
252 match window_ref.refresh_state {
253 Some(RefreshState::PeriodicRefresh {
254 event_loop_token, ..
255 }) => {
256 state.loop_handle.remove(event_loop_token);
257 }
258 _ => {}
259 }
260 }
261 if state.mouse_focused_window == Some(x_window) {
262 state.mouse_focused_window = None;
263 }
264 if state.keyboard_focused_window == Some(x_window) {
265 state.keyboard_focused_window = None;
266 }
267 state.cursor_styles.remove(&x_window);
268
269 if state.windows.is_empty() {
270 state.common.signal.stop();
271 }
272 }
273
274 pub fn update_ime_position(&self, bounds: Bounds<ScaledPixels>) {
275 let Some(client) = self.get_client() else {
276 return;
277 };
278 let mut state = client.0.borrow_mut();
279 if state.composing || state.ximc.is_none() {
280 return;
281 }
282
283 let Some(mut ximc) = state.ximc.take() else {
284 log::error!("bug: xim connection not set");
285 return;
286 };
287 let Some(xim_handler) = state.xim_handler.take() else {
288 log::error!("bug: xim handler not set");
289 state.ximc = Some(ximc);
290 return;
291 };
292 let ic_attributes = ximc
293 .build_ic_attributes()
294 .push(
295 xim::AttributeName::InputStyle,
296 xim::InputStyle::PREEDIT_CALLBACKS,
297 )
298 .push(xim::AttributeName::ClientWindow, xim_handler.window)
299 .push(xim::AttributeName::FocusWindow, xim_handler.window)
300 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
301 b.push(
302 xim::AttributeName::SpotLocation,
303 xim::Point {
304 x: u32::from(bounds.origin.x + bounds.size.width) as i16,
305 y: u32::from(bounds.origin.y + bounds.size.height) as i16,
306 },
307 );
308 })
309 .build();
310 let _ = ximc
311 .set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
312 .log_err();
313 state.ximc = Some(ximc);
314 state.xim_handler = Some(xim_handler);
315 }
316}
317
318#[derive(Clone)]
319pub(crate) struct X11Client(Rc<RefCell<X11ClientState>>);
320
321impl X11Client {
322 pub(crate) fn new() -> anyhow::Result<Self> {
323 let event_loop = EventLoop::try_new()?;
324
325 let (common, main_receiver) = LinuxCommon::new(event_loop.get_signal());
326
327 let handle = event_loop.handle();
328
329 handle
330 .insert_source(main_receiver, {
331 let handle = handle.clone();
332 move |event, _, _: &mut X11Client| {
333 if let calloop::channel::Event::Msg(runnable) = event {
334 // Insert the runnables as idle callbacks, so we make sure that user-input and X11
335 // events have higher priority and runnables are only worked off after the event
336 // callbacks.
337 handle.insert_idle(|_| {
338 runnable.run();
339 });
340 }
341 }
342 })
343 .map_err(|err| {
344 anyhow!("Failed to initialize event loop handling of foreground tasks: {err:?}")
345 })?;
346
347 let (xcb_connection, x_root_index) = XCBConnection::connect(None)?;
348 xcb_connection.prefetch_extension_information(xkb::X11_EXTENSION_NAME)?;
349 xcb_connection.prefetch_extension_information(randr::X11_EXTENSION_NAME)?;
350 xcb_connection.prefetch_extension_information(render::X11_EXTENSION_NAME)?;
351 xcb_connection.prefetch_extension_information(xinput::X11_EXTENSION_NAME)?;
352
353 // Announce to X server that XInput up to 2.1 is supported. To increase this to 2.2 and
354 // beyond, support for touch events would need to be added.
355 let xinput_version = get_reply(
356 || "XInput XiQueryVersion failed",
357 xcb_connection.xinput_xi_query_version(2, 1),
358 )?;
359 assert!(
360 xinput_version.major_version >= 2,
361 "XInput version >= 2 required."
362 );
363
364 let pointer_device_states =
365 current_pointer_device_states(&xcb_connection, &BTreeMap::new()).unwrap_or_default();
366
367 let atoms = XcbAtoms::new(&xcb_connection)
368 .context("Failed to get XCB atoms")?
369 .reply()
370 .context("Failed to get XCB atoms")?;
371
372 let root = xcb_connection.setup().roots[0].root;
373 let compositor_present = check_compositor_present(&xcb_connection, root);
374 let gtk_frame_extents_supported =
375 check_gtk_frame_extents_supported(&xcb_connection, &atoms, root);
376 let client_side_decorations_supported = compositor_present && gtk_frame_extents_supported;
377 log::info!(
378 "x11: compositor present: {}, gtk_frame_extents_supported: {}",
379 compositor_present,
380 gtk_frame_extents_supported
381 );
382
383 let xkb = get_reply(
384 || "Failed to initialize XKB extension",
385 xcb_connection
386 .xkb_use_extension(XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION),
387 )?;
388 assert!(xkb.supported);
389
390 let events = xkb::EventType::STATE_NOTIFY
391 | xkb::EventType::MAP_NOTIFY
392 | xkb::EventType::NEW_KEYBOARD_NOTIFY;
393 let map_notify_parts = xkb::MapPart::KEY_TYPES
394 | xkb::MapPart::KEY_SYMS
395 | xkb::MapPart::MODIFIER_MAP
396 | xkb::MapPart::EXPLICIT_COMPONENTS
397 | xkb::MapPart::KEY_ACTIONS
398 | xkb::MapPart::KEY_BEHAVIORS
399 | xkb::MapPart::VIRTUAL_MODS
400 | xkb::MapPart::VIRTUAL_MOD_MAP;
401 check_reply(
402 || "Failed to select XKB events",
403 xcb_connection.xkb_select_events(
404 xkb::ID::USE_CORE_KBD.into(),
405 0u8.into(),
406 events,
407 map_notify_parts,
408 map_notify_parts,
409 &xkb::SelectEventsAux::new(),
410 ),
411 )?;
412
413 let xkb_context = xkbc::Context::new(xkbc::CONTEXT_NO_FLAGS);
414 let xkb_device_id = xkbc::x11::get_core_keyboard_device_id(&xcb_connection);
415 let xkb_state = {
416 let xkb_keymap = xkbc::x11::keymap_new_from_device(
417 &xkb_context,
418 &xcb_connection,
419 xkb_device_id,
420 xkbc::KEYMAP_COMPILE_NO_FLAGS,
421 );
422 xkbc::x11::state_new_from_device(&xkb_keymap, &xcb_connection, xkb_device_id)
423 };
424 let compose_state = get_xkb_compose_state(&xkb_context);
425 let layout_idx = xkb_state.serialize_layout(STATE_LAYOUT_EFFECTIVE);
426 let layout_name = xkb_state
427 .get_keymap()
428 .layout_get_name(layout_idx)
429 .to_string();
430 let keyboard_layout = LinuxKeyboardLayout::new(layout_name.into());
431 let keyboard_layout = Box::new(LinuxKeyboardLayout::new(&xkb_state));
432 let keyboard_mapper = Rc::new(LinuxKeyboardMapper::new(0, 0, 0));
433 let keyboard_mapper_cache = HashMap::default();
434
435 let gpu_context = BladeContext::new().context("Unable to init GPU context")?;
436
437 let resource_database = x11rb::resource_manager::new_from_default(&xcb_connection)
438 .context("Failed to create resource database")?;
439 let scale_factor = resource_database
440 .get_value("Xft.dpi", "Xft.dpi")
441 .ok()
442 .flatten()
443 .map(|dpi: f32| dpi / 96.0)
444 .unwrap_or(1.0);
445 let cursor_handle = cursor::Handle::new(&xcb_connection, x_root_index, &resource_database)
446 .context("Failed to initialize cursor theme handler")?
447 .reply()
448 .context("Failed to initialize cursor theme handler")?;
449
450 let clipboard = Clipboard::new().context("Failed to initialize clipboard")?;
451
452 let xcb_connection = Rc::new(xcb_connection);
453
454 let ximc = X11rbClient::init(Rc::clone(&xcb_connection), x_root_index, None).ok();
455 let xim_handler = if ximc.is_some() {
456 Some(XimHandler::new())
457 } else {
458 None
459 };
460
461 // Safety: Safe if xcb::Connection always returns a valid fd
462 let fd = unsafe { FdWrapper::new(Rc::clone(&xcb_connection)) };
463
464 handle
465 .insert_source(
466 Generic::new_with_error::<EventHandlerError>(
467 fd,
468 calloop::Interest::READ,
469 calloop::Mode::Level,
470 ),
471 {
472 let xcb_connection = xcb_connection.clone();
473 move |_readiness, _, client| {
474 client.process_x11_events(&xcb_connection)?;
475 Ok(calloop::PostAction::Continue)
476 }
477 },
478 )
479 .map_err(|err| anyhow!("Failed to initialize X11 event source: {err:?}"))?;
480
481 handle
482 .insert_source(XDPEventSource::new(&common.background_executor), {
483 move |event, _, client| match event {
484 XDPEvent::WindowAppearance(appearance) => {
485 client.with_common(|common| common.appearance = appearance);
486 for (_, window) in &mut client.0.borrow_mut().windows {
487 window.window.set_appearance(appearance);
488 }
489 }
490 XDPEvent::CursorTheme(_) | XDPEvent::CursorSize(_) => {
491 // noop, X11 manages this for us.
492 }
493 }
494 })
495 .map_err(|err| anyhow!("Failed to initialize XDP event source: {err:?}"))?;
496
497 xcb_flush(&xcb_connection);
498
499 Ok(X11Client(Rc::new(RefCell::new(X11ClientState {
500 modifiers: Modifiers::default(),
501 capslock: Capslock::default(),
502 last_modifiers_changed_event: Modifiers::default(),
503 last_capslock_changed_event: Capslock::default(),
504 event_loop: Some(event_loop),
505 loop_handle: handle,
506 common,
507 last_click: Instant::now(),
508 last_mouse_button: None,
509 last_location: Point::new(px(0.0), px(0.0)),
510 current_count: 0,
511 gpu_context,
512 scale_factor,
513
514 xkb_context,
515 xcb_connection,
516 xkb_device_id,
517 client_side_decorations_supported,
518 x_root_index,
519 _resource_database: resource_database,
520 atoms,
521 windows: HashMap::default(),
522 mouse_focused_window: None,
523 keyboard_focused_window: None,
524 xkb: xkb_state,
525 previous_xkb_state: XKBStateNotiy::default(),
526 keyboard_layout,
527 keyboard_mapper,
528 keyboard_mapper_cache,
529 ximc,
530 xim_handler,
531
532 compose_state,
533 pre_edit_text: None,
534 pre_key_char_down: None,
535 composing: false,
536
537 cursor_handle,
538 cursor_styles: HashMap::default(),
539 cursor_cache: HashMap::default(),
540
541 pointer_device_states,
542
543 clipboard,
544 clipboard_item: None,
545 xdnd_state: Xdnd::default(),
546 }))))
547 }
548
549 pub fn process_x11_events(
550 &self,
551 xcb_connection: &XCBConnection,
552 ) -> Result<(), EventHandlerError> {
553 loop {
554 let mut events = Vec::new();
555 let mut windows_to_refresh = HashSet::new();
556
557 let mut last_key_release = None;
558 let mut last_key_press: Option<KeyPressEvent> = None;
559
560 // event handlers for new keyboard / remapping refresh the state without using event
561 // details, this deduplicates them.
562 let mut last_keymap_change_event: Option<Event> = None;
563
564 loop {
565 match xcb_connection.poll_for_event() {
566 Ok(Some(event)) => {
567 match event {
568 Event::Expose(expose_event) => {
569 windows_to_refresh.insert(expose_event.window);
570 }
571 Event::KeyRelease(_) => {
572 if let Some(last_keymap_change_event) =
573 last_keymap_change_event.take()
574 {
575 if let Some(last_key_release) = last_key_release.take() {
576 events.push(last_key_release);
577 }
578 last_key_press = None;
579 events.push(last_keymap_change_event);
580 }
581
582 last_key_release = Some(event);
583 }
584 Event::KeyPress(key_press) => {
585 if let Some(last_keymap_change_event) =
586 last_keymap_change_event.take()
587 {
588 if let Some(last_key_release) = last_key_release.take() {
589 events.push(last_key_release);
590 }
591 last_key_press = None;
592 events.push(last_keymap_change_event);
593 }
594
595 if let Some(last_press) = last_key_press.as_ref() {
596 if last_press.detail == key_press.detail {
597 continue;
598 }
599 }
600
601 if let Some(Event::KeyRelease(key_release)) =
602 last_key_release.take()
603 {
604 // We ignore that last KeyRelease if it's too close to this KeyPress,
605 // suggesting that it's auto-generated by X11 as a key-repeat event.
606 if key_release.detail != key_press.detail
607 || key_press.time.saturating_sub(key_release.time) > 20
608 {
609 events.push(Event::KeyRelease(key_release));
610 }
611 }
612 events.push(Event::KeyPress(key_press));
613 last_key_press = Some(key_press);
614 }
615 Event::XkbNewKeyboardNotify(_) | Event::XkbMapNotify(_) => {
616 if let Some(release_event) = last_key_release.take() {
617 events.push(release_event);
618 }
619 last_keymap_change_event = Some(event);
620 }
621 _ => {
622 if let Some(release_event) = last_key_release.take() {
623 events.push(release_event);
624 }
625 events.push(event);
626 }
627 }
628 }
629 Ok(None) => {
630 break;
631 }
632 Err(err) => {
633 let err = handle_connection_error(err);
634 log::warn!("error while polling for X11 events: {err:?}");
635 break;
636 }
637 }
638 }
639
640 if let Some(release_event) = last_key_release.take() {
641 events.push(release_event);
642 }
643 if let Some(keymap_change_event) = last_keymap_change_event.take() {
644 events.push(keymap_change_event);
645 }
646
647 if events.is_empty() && windows_to_refresh.is_empty() {
648 break;
649 }
650
651 for window in windows_to_refresh.into_iter() {
652 let mut state = self.0.borrow_mut();
653 if let Some(window) = state.windows.get_mut(&window) {
654 window.expose_event_received = true;
655 }
656 }
657
658 for event in events.into_iter() {
659 let mut state = self.0.borrow_mut();
660 if !state.has_xim() {
661 drop(state);
662 self.handle_event(event);
663 continue;
664 }
665
666 let Some((mut ximc, mut xim_handler)) = state.take_xim() else {
667 continue;
668 };
669 let xim_connected = xim_handler.connected;
670 drop(state);
671
672 let xim_filtered = match ximc.filter_event(&event, &mut xim_handler) {
673 Ok(handled) => handled,
674 Err(err) => {
675 log::error!("XIMClientError: {}", err);
676 false
677 }
678 };
679 let xim_callback_event = xim_handler.last_callback_event.take();
680
681 let mut state = self.0.borrow_mut();
682 state.restore_xim(ximc, xim_handler);
683 drop(state);
684
685 if let Some(event) = xim_callback_event {
686 self.handle_xim_callback_event(event);
687 }
688
689 if xim_filtered {
690 continue;
691 }
692
693 if xim_connected {
694 self.xim_handle_event(event);
695 } else {
696 self.handle_event(event);
697 }
698 }
699 }
700 Ok(())
701 }
702
703 pub fn enable_ime(&self) {
704 let mut state = self.0.borrow_mut();
705 if !state.has_xim() {
706 return;
707 }
708
709 let Some((mut ximc, mut xim_handler)) = state.take_xim() else {
710 return;
711 };
712 let mut ic_attributes = ximc
713 .build_ic_attributes()
714 .push(AttributeName::InputStyle, InputStyle::PREEDIT_CALLBACKS)
715 .push(AttributeName::ClientWindow, xim_handler.window)
716 .push(AttributeName::FocusWindow, xim_handler.window);
717
718 let window_id = state.keyboard_focused_window;
719 drop(state);
720 if let Some(window_id) = window_id {
721 let Some(window) = self.get_window(window_id) else {
722 log::error!("Failed to get window for IME positioning");
723 let mut state = self.0.borrow_mut();
724 state.ximc = Some(ximc);
725 state.xim_handler = Some(xim_handler);
726 return;
727 };
728 if let Some(area) = window.get_ime_area() {
729 ic_attributes =
730 ic_attributes.nested_list(xim::AttributeName::PreeditAttributes, |b| {
731 b.push(
732 xim::AttributeName::SpotLocation,
733 xim::Point {
734 x: u32::from(area.origin.x + area.size.width) as i16,
735 y: u32::from(area.origin.y + area.size.height) as i16,
736 },
737 );
738 });
739 }
740 }
741 ximc.create_ic(xim_handler.im_id, ic_attributes.build())
742 .ok();
743 let mut state = self.0.borrow_mut();
744 state.restore_xim(ximc, xim_handler);
745 }
746
747 pub fn reset_ime(&self) {
748 let mut state = self.0.borrow_mut();
749 state.composing = false;
750 if let Some(mut ximc) = state.ximc.take() {
751 if let Some(xim_handler) = state.xim_handler.as_ref() {
752 ximc.reset_ic(xim_handler.im_id, xim_handler.ic_id).ok();
753 } else {
754 log::error!("bug: xim handler not set in reset_ime");
755 }
756 state.ximc = Some(ximc);
757 }
758 }
759
760 fn get_window(&self, win: xproto::Window) -> Option<X11WindowStatePtr> {
761 let state = self.0.borrow();
762 state
763 .windows
764 .get(&win)
765 .filter(|window_reference| !window_reference.window.state.borrow().destroyed)
766 .map(|window_reference| window_reference.window.clone())
767 }
768
769 fn handle_event(&self, event: Event) -> Option<()> {
770 match event {
771 Event::UnmapNotify(event) => {
772 let mut state = self.0.borrow_mut();
773 if let Some(window_ref) = state.windows.get_mut(&event.window) {
774 window_ref.is_mapped = false;
775 }
776 state.update_refresh_loop(event.window);
777 }
778 Event::MapNotify(event) => {
779 let mut state = self.0.borrow_mut();
780 if let Some(window_ref) = state.windows.get_mut(&event.window) {
781 window_ref.is_mapped = true;
782 }
783 state.update_refresh_loop(event.window);
784 }
785 Event::VisibilityNotify(event) => {
786 let mut state = self.0.borrow_mut();
787 if let Some(window_ref) = state.windows.get_mut(&event.window) {
788 window_ref.last_visibility = event.state;
789 }
790 state.update_refresh_loop(event.window);
791 }
792 Event::ClientMessage(event) => {
793 let window = self.get_window(event.window)?;
794 let [atom, arg1, arg2, arg3, arg4] = event.data.as_data32();
795 let mut state = self.0.borrow_mut();
796
797 if atom == state.atoms.WM_DELETE_WINDOW {
798 // window "x" button clicked by user
799 if window.should_close() {
800 // Rest of the close logic is handled in drop_window()
801 window.close();
802 }
803 } else if atom == state.atoms._NET_WM_SYNC_REQUEST {
804 window.state.borrow_mut().last_sync_counter =
805 Some(x11rb::protocol::sync::Int64 {
806 lo: arg2,
807 hi: arg3 as i32,
808 })
809 }
810
811 if event.type_ == state.atoms.XdndEnter {
812 state.xdnd_state.other_window = atom;
813 if (arg1 & 0x1) == 0x1 {
814 state.xdnd_state.drag_type = xdnd_get_supported_atom(
815 &state.xcb_connection,
816 &state.atoms,
817 state.xdnd_state.other_window,
818 );
819 } else {
820 if let Some(atom) = [arg2, arg3, arg4]
821 .into_iter()
822 .find(|atom| xdnd_is_atom_supported(*atom, &state.atoms))
823 {
824 state.xdnd_state.drag_type = atom;
825 }
826 }
827 } else if event.type_ == state.atoms.XdndLeave {
828 let position = state.xdnd_state.position;
829 drop(state);
830 window
831 .handle_input(PlatformInput::FileDrop(FileDropEvent::Pending { position }));
832 window.handle_input(PlatformInput::FileDrop(FileDropEvent::Exited {}));
833 self.0.borrow_mut().xdnd_state = Xdnd::default();
834 } else if event.type_ == state.atoms.XdndPosition {
835 if let Ok(pos) = get_reply(
836 || "Failed to query pointer position",
837 state.xcb_connection.query_pointer(event.window),
838 ) {
839 state.xdnd_state.position =
840 Point::new(Pixels(pos.win_x as f32), Pixels(pos.win_y as f32));
841 }
842 if !state.xdnd_state.retrieved {
843 check_reply(
844 || "Failed to convert selection for drag and drop",
845 state.xcb_connection.convert_selection(
846 event.window,
847 state.atoms.XdndSelection,
848 state.xdnd_state.drag_type,
849 state.atoms.XDND_DATA,
850 arg3,
851 ),
852 )
853 .log_err();
854 }
855 xdnd_send_status(
856 &state.xcb_connection,
857 &state.atoms,
858 event.window,
859 state.xdnd_state.other_window,
860 arg4,
861 );
862 let position = state.xdnd_state.position;
863 drop(state);
864 window
865 .handle_input(PlatformInput::FileDrop(FileDropEvent::Pending { position }));
866 } else if event.type_ == state.atoms.XdndDrop {
867 xdnd_send_finished(
868 &state.xcb_connection,
869 &state.atoms,
870 event.window,
871 state.xdnd_state.other_window,
872 );
873 let position = state.xdnd_state.position;
874 drop(state);
875 window
876 .handle_input(PlatformInput::FileDrop(FileDropEvent::Submit { position }));
877 self.0.borrow_mut().xdnd_state = Xdnd::default();
878 }
879 }
880 Event::SelectionNotify(event) => {
881 let window = self.get_window(event.requestor)?;
882 let mut state = self.0.borrow_mut();
883 let reply = get_reply(
884 || "Failed to get XDND_DATA",
885 state.xcb_connection.get_property(
886 false,
887 event.requestor,
888 state.atoms.XDND_DATA,
889 AtomEnum::ANY,
890 0,
891 1024,
892 ),
893 )
894 .log_err();
895 let Some(reply) = reply else {
896 return Some(());
897 };
898 match str::from_utf8(&reply.value) {
899 Ok(file_list) => {
900 let paths: SmallVec<[_; 2]> = file_list
901 .lines()
902 .filter_map(|path| Url::parse(path).log_err())
903 .filter_map(|url| url.to_file_path().log_err())
904 .collect();
905 let input = PlatformInput::FileDrop(FileDropEvent::Entered {
906 position: state.xdnd_state.position,
907 paths: crate::ExternalPaths(paths),
908 });
909 drop(state);
910 window.handle_input(input);
911 self.0.borrow_mut().xdnd_state.retrieved = true;
912 }
913 Err(_) => {}
914 }
915 }
916 Event::ConfigureNotify(event) => {
917 let bounds = Bounds {
918 origin: Point {
919 x: event.x.into(),
920 y: event.y.into(),
921 },
922 size: Size {
923 width: event.width.into(),
924 height: event.height.into(),
925 },
926 };
927 let window = self.get_window(event.window)?;
928 window
929 .set_bounds(bounds)
930 .context("X11: Failed to set window bounds")
931 .log_err();
932 }
933 Event::PropertyNotify(event) => {
934 let window = self.get_window(event.window)?;
935 window
936 .property_notify(event)
937 .context("X11: Failed to handle property notify")
938 .log_err();
939 }
940 Event::FocusIn(event) => {
941 let window = self.get_window(event.event)?;
942 window.set_active(true);
943 let mut state = self.0.borrow_mut();
944 state.keyboard_focused_window = Some(event.event);
945 if let Some(handler) = state.xim_handler.as_mut() {
946 handler.window = event.event;
947 }
948 drop(state);
949 self.enable_ime();
950 }
951 Event::FocusOut(event) => {
952 let window = self.get_window(event.event)?;
953 window.set_active(false);
954 let mut state = self.0.borrow_mut();
955 state.keyboard_focused_window = None;
956 if let Some(compose_state) = state.compose_state.as_mut() {
957 compose_state.reset();
958 }
959 state.pre_edit_text.take();
960 drop(state);
961 self.reset_ime();
962 window.handle_ime_delete();
963 }
964 Event::XkbNewKeyboardNotify(_) | Event::XkbMapNotify(_) => {
965 let mut state = self.0.borrow_mut();
966 let xkb_state = {
967 let xkb_keymap = xkbc::x11::keymap_new_from_device(
968 &state.xkb_context,
969 &state.xcb_connection,
970 state.xkb_device_id,
971 xkbc::KEYMAP_COMPILE_NO_FLAGS,
972 );
973 xkbc::x11::state_new_from_device(
974 &xkb_keymap,
975 &state.xcb_connection,
976 state.xkb_device_id,
977 )
978 };
979 let depressed_layout = xkb_state.serialize_layout(xkbc::STATE_LAYOUT_DEPRESSED);
980 let latched_layout = xkb_state.serialize_layout(xkbc::STATE_LAYOUT_LATCHED);
981 let locked_layout = xkb_state.serialize_layout(xkbc::ffi::XKB_STATE_LAYOUT_LOCKED);
982 state.previous_xkb_state = XKBStateNotiy {
983 depressed_layout,
984 latched_layout,
985 locked_layout,
986 };
987 let keyboard_layout = LinuxKeyboardLayout::new(&xkb_state);
988 state.xkb = xkb_state;
989 drop(state);
990 self.handle_keyboard_layout_change();
991 update_keyboard_mapper(
992 &mut state,
993 keyboard_layout,
994 depressed_layout,
995 latched_layout,
996 locked_layout,
997 );
998 }
999 Event::XkbStateNotify(event) => {
1000 let mut state = self.0.borrow_mut();
1001 let old_layout = state.xkb.serialize_layout(STATE_LAYOUT_EFFECTIVE);
1002 let new_layout = u32::from(event.group);
1003 let base_group = event.base_group as u32;
1004 let latched_group = event.latched_group as u32;
1005 let locked_group = event.locked_group.into();
1006 state.xkb.update_mask(
1007 event.base_mods.into(),
1008 event.latched_mods.into(),
1009 event.locked_mods.into(),
1010 base_group,
1011 latched_group,
1012 locked_group,
1013 );
1014 state.previous_xkb_state = XKBStateNotiy {
1015 depressed_layout: base_group,
1016 latched_layout: latched_group,
1017 locked_layout: locked_group,
1018 };
1019
1020 let modifiers = Modifiers::from_xkb(&state.keyboard_state.state);
1021 let capslock = Capslock::from_xkb(&state.keyboard_state.state);
1022 if state.last_modifiers_changed_event == modifiers
1023 && state.last_capslock_changed_event == capslock
1024 {
1025 drop(state);
1026 } else {
1027 let focused_window_id = state.keyboard_focused_window?;
1028 state.modifiers = modifiers;
1029 state.last_modifiers_changed_event = modifiers;
1030 state.capslock = capslock;
1031 state.last_capslock_changed_event = capslock;
1032 drop(state);
1033
1034 let focused_window = self.get_window(focused_window_id)?;
1035 focused_window.handle_input(PlatformInput::ModifiersChanged(
1036 ModifiersChangedEvent {
1037 modifiers,
1038 capslock,
1039 },
1040 ));
1041 }
1042
1043 if new_layout != old_layout {
1044 self.handle_keyboard_layout_change();
1045 }
1046 }
1047 Event::KeyPress(event) => {
1048 let window = self.get_window(event.event)?;
1049 let mut state = self.0.borrow_mut();
1050
1051 let modifiers = modifiers_from_state(event.state);
1052 state.modifiers = modifiers;
1053 state.pre_key_char_down.take();
1054 let keystroke = {
1055 let code = event.detail.into();
1056 let xkb_state = state.previous_xkb_state.clone();
1057 state.xkb.update_mask(
1058 event.state.bits() as ModMask,
1059 0,
1060 0,
1061 xkb_state.depressed_layout,
1062 xkb_state.latched_layout,
1063 xkb_state.locked_layout,
1064 );
1065 let mut keystroke = crate::Keystroke::from_xkb(
1066 &state.xkb,
1067 &state.keyboard_mapper,
1068 modifiers,
1069 code,
1070 );
1071 let keysym = state.xkb.key_get_one_sym(code);
1072 if keysym.is_modifier_key() {
1073 return Some(());
1074 }
1075 if let Some(mut compose_state) = state.compose_state.take() {
1076 compose_state.feed(keysym);
1077 match compose_state.status() {
1078 xkbc::Status::Composed => {
1079 state.pre_edit_text.take();
1080 keystroke.key_char = compose_state.utf8();
1081 if let Some(keysym) = compose_state.keysym() {
1082 keystroke.key = xkbc::keysym_get_name(keysym);
1083 }
1084 }
1085 xkbc::Status::Composing => {
1086 keystroke.key_char = None;
1087 state.pre_edit_text =
1088 compose_state.utf8().or(underlying_dead_key(keysym));
1089 let pre_edit =
1090 state.pre_edit_text.clone().unwrap_or(String::default());
1091 drop(state);
1092 window.handle_ime_preedit(pre_edit);
1093 state = self.0.borrow_mut();
1094 }
1095 xkbc::Status::Cancelled => {
1096 let pre_edit = state.pre_edit_text.take();
1097 drop(state);
1098 if let Some(pre_edit) = pre_edit {
1099 window.handle_ime_commit(pre_edit);
1100 }
1101 if let Some(current_key) = underlying_dead_key(keysym) {
1102 window.handle_ime_preedit(current_key);
1103 }
1104 state = self.0.borrow_mut();
1105 compose_state.feed(keysym);
1106 }
1107 _ => {}
1108 }
1109 state.compose_state = Some(compose_state);
1110 }
1111 keystroke
1112 };
1113 drop(state);
1114 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
1115 keystroke,
1116 is_held: false,
1117 }));
1118 }
1119 Event::KeyRelease(event) => {
1120 let window = self.get_window(event.event)?;
1121 let mut state = self.0.borrow_mut();
1122
1123 let modifiers = modifiers_from_state(event.state);
1124 state.modifiers = modifiers;
1125
1126 let keystroke = {
1127 let code = event.detail.into();
1128 let xkb_state = state.previous_xkb_state.clone();
1129 state.xkb.update_mask(
1130 event.state.bits() as ModMask,
1131 0,
1132 0,
1133 xkb_state.depressed_layout,
1134 xkb_state.latched_layout,
1135 xkb_state.locked_layout,
1136 );
1137 let keystroke = crate::Keystroke::from_xkb(
1138 &state.xkb,
1139 &state.keyboard_mapper,
1140 modifiers,
1141 code,
1142 );
1143 let keysym = state.xkb.key_get_one_sym(code);
1144 if keysym.is_modifier_key() {
1145 return Some(());
1146 }
1147 keystroke
1148 };
1149 drop(state);
1150 window.handle_input(PlatformInput::KeyUp(crate::KeyUpEvent { keystroke }));
1151 }
1152 Event::XinputButtonPress(event) => {
1153 let window = self.get_window(event.event)?;
1154 let mut state = self.0.borrow_mut();
1155
1156 let modifiers = modifiers_from_xinput_info(event.mods);
1157 state.modifiers = modifiers;
1158
1159 let position = point(
1160 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1161 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1162 );
1163
1164 if state.composing && state.ximc.is_some() {
1165 drop(state);
1166 self.reset_ime();
1167 window.handle_ime_unmark();
1168 state = self.0.borrow_mut();
1169 } else if let Some(text) = state.pre_edit_text.take() {
1170 if let Some(compose_state) = state.compose_state.as_mut() {
1171 compose_state.reset();
1172 }
1173 drop(state);
1174 window.handle_ime_commit(text);
1175 state = self.0.borrow_mut();
1176 }
1177 match button_or_scroll_from_event_detail(event.detail) {
1178 Some(ButtonOrScroll::Button(button)) => {
1179 let click_elapsed = state.last_click.elapsed();
1180 if click_elapsed < DOUBLE_CLICK_INTERVAL
1181 && state
1182 .last_mouse_button
1183 .is_some_and(|prev_button| prev_button == button)
1184 && is_within_click_distance(state.last_location, position)
1185 {
1186 state.current_count += 1;
1187 } else {
1188 state.current_count = 1;
1189 }
1190
1191 state.last_click = Instant::now();
1192 state.last_mouse_button = Some(button);
1193 state.last_location = position;
1194 let current_count = state.current_count;
1195
1196 drop(state);
1197 window.handle_input(PlatformInput::MouseDown(crate::MouseDownEvent {
1198 button,
1199 position,
1200 modifiers,
1201 click_count: current_count,
1202 first_mouse: false,
1203 }));
1204 }
1205 Some(ButtonOrScroll::Scroll(direction)) => {
1206 drop(state);
1207 // Emulated scroll button presses are sent simultaneously with smooth scrolling XinputMotion events.
1208 // Since handling those events does the scrolling, they are skipped here.
1209 if !event
1210 .flags
1211 .contains(xinput::PointerEventFlags::POINTER_EMULATED)
1212 {
1213 let scroll_delta = match direction {
1214 ScrollDirection::Up => Point::new(0.0, SCROLL_LINES),
1215 ScrollDirection::Down => Point::new(0.0, -SCROLL_LINES),
1216 ScrollDirection::Left => Point::new(SCROLL_LINES, 0.0),
1217 ScrollDirection::Right => Point::new(-SCROLL_LINES, 0.0),
1218 };
1219 window.handle_input(PlatformInput::ScrollWheel(
1220 make_scroll_wheel_event(position, scroll_delta, modifiers),
1221 ));
1222 }
1223 }
1224 None => {
1225 log::error!("Unknown x11 button: {}", event.detail);
1226 }
1227 }
1228 }
1229 Event::XinputButtonRelease(event) => {
1230 let window = self.get_window(event.event)?;
1231 let mut state = self.0.borrow_mut();
1232 let modifiers = modifiers_from_xinput_info(event.mods);
1233 state.modifiers = modifiers;
1234
1235 let position = point(
1236 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1237 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1238 );
1239 match button_or_scroll_from_event_detail(event.detail) {
1240 Some(ButtonOrScroll::Button(button)) => {
1241 let click_count = state.current_count;
1242 drop(state);
1243 window.handle_input(PlatformInput::MouseUp(crate::MouseUpEvent {
1244 button,
1245 position,
1246 modifiers,
1247 click_count,
1248 }));
1249 }
1250 Some(ButtonOrScroll::Scroll(_)) => {}
1251 None => {}
1252 }
1253 }
1254 Event::XinputMotion(event) => {
1255 let window = self.get_window(event.event)?;
1256 let mut state = self.0.borrow_mut();
1257 let pressed_button = pressed_button_from_mask(event.button_mask[0]);
1258 let position = point(
1259 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1260 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1261 );
1262 let modifiers = modifiers_from_xinput_info(event.mods);
1263 state.modifiers = modifiers;
1264 drop(state);
1265
1266 if event.valuator_mask[0] & 3 != 0 {
1267 window.handle_input(PlatformInput::MouseMove(crate::MouseMoveEvent {
1268 position,
1269 pressed_button,
1270 modifiers,
1271 }));
1272 }
1273
1274 state = self.0.borrow_mut();
1275 if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
1276 let scroll_delta = get_scroll_delta_and_update_state(&mut pointer, &event);
1277 drop(state);
1278 if let Some(scroll_delta) = scroll_delta {
1279 window.handle_input(PlatformInput::ScrollWheel(make_scroll_wheel_event(
1280 position,
1281 scroll_delta,
1282 modifiers,
1283 )));
1284 }
1285 }
1286 }
1287 Event::XinputEnter(event) if event.mode == xinput::NotifyMode::NORMAL => {
1288 let window = self.get_window(event.event)?;
1289 window.set_hovered(true);
1290 let mut state = self.0.borrow_mut();
1291 state.mouse_focused_window = Some(event.event);
1292 }
1293 Event::XinputLeave(event) if event.mode == xinput::NotifyMode::NORMAL => {
1294 let mut state = self.0.borrow_mut();
1295
1296 // Set last scroll values to `None` so that a large delta isn't created if scrolling is done outside the window (the valuator is global)
1297 reset_all_pointer_device_scroll_positions(&mut state.pointer_device_states);
1298 state.mouse_focused_window = None;
1299 let pressed_button = pressed_button_from_mask(event.buttons[0]);
1300 let position = point(
1301 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1302 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1303 );
1304 let modifiers = modifiers_from_xinput_info(event.mods);
1305 state.modifiers = modifiers;
1306 drop(state);
1307
1308 let window = self.get_window(event.event)?;
1309 window.handle_input(PlatformInput::MouseExited(crate::MouseExitEvent {
1310 pressed_button,
1311 position,
1312 modifiers,
1313 }));
1314 window.set_hovered(false);
1315 }
1316 Event::XinputHierarchy(event) => {
1317 let mut state = self.0.borrow_mut();
1318 // Temporarily use `state.pointer_device_states` to only store pointers that still have valid scroll values.
1319 // Any change to a device invalidates its scroll values.
1320 for info in event.infos {
1321 if is_pointer_device(info.type_) {
1322 state.pointer_device_states.remove(&info.deviceid);
1323 }
1324 }
1325 if let Some(pointer_device_states) = current_pointer_device_states(
1326 &state.xcb_connection,
1327 &state.pointer_device_states,
1328 ) {
1329 state.pointer_device_states = pointer_device_states;
1330 }
1331 }
1332 Event::XinputDeviceChanged(event) => {
1333 let mut state = self.0.borrow_mut();
1334 if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
1335 reset_pointer_device_scroll_positions(&mut pointer);
1336 }
1337 }
1338 _ => {}
1339 };
1340
1341 Some(())
1342 }
1343
1344 fn handle_xim_callback_event(&self, event: XimCallbackEvent) {
1345 match event {
1346 XimCallbackEvent::XimXEvent(event) => {
1347 self.handle_event(event);
1348 }
1349 XimCallbackEvent::XimCommitEvent(window, text) => {
1350 self.xim_handle_commit(window, text);
1351 }
1352 XimCallbackEvent::XimPreeditEvent(window, text) => {
1353 self.xim_handle_preedit(window, text);
1354 }
1355 };
1356 }
1357
1358 fn xim_handle_event(&self, event: Event) -> Option<()> {
1359 match event {
1360 Event::KeyPress(event) | Event::KeyRelease(event) => {
1361 let mut state = self.0.borrow_mut();
1362 state.pre_key_char_down = Some(Keystroke::from_xkb(
1363 &state.xkb,
1364 &state.keyboard_mapper,
1365 state.modifiers,
1366 event.detail.into(),
1367 ));
1368 let (mut ximc, mut xim_handler) = state.take_xim()?;
1369 drop(state);
1370 xim_handler.window = event.event;
1371 ximc.forward_event(
1372 xim_handler.im_id,
1373 xim_handler.ic_id,
1374 xim::ForwardEventFlag::empty(),
1375 &event,
1376 )
1377 .context("X11: Failed to forward XIM event")
1378 .log_err();
1379 let mut state = self.0.borrow_mut();
1380 state.restore_xim(ximc, xim_handler);
1381 drop(state);
1382 }
1383 event => {
1384 self.handle_event(event);
1385 }
1386 }
1387 Some(())
1388 }
1389
1390 fn xim_handle_commit(&self, window: xproto::Window, text: String) -> Option<()> {
1391 let Some(window) = self.get_window(window) else {
1392 log::error!("bug: Failed to get window for XIM commit");
1393 return None;
1394 };
1395 let mut state = self.0.borrow_mut();
1396 let keystroke = state.pre_key_char_down.take();
1397 state.composing = false;
1398 drop(state);
1399 if let Some(mut keystroke) = keystroke {
1400 keystroke.key_char = Some(text.clone());
1401 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
1402 keystroke,
1403 is_held: false,
1404 }));
1405 }
1406
1407 Some(())
1408 }
1409
1410 fn xim_handle_preedit(&self, window: xproto::Window, text: String) -> Option<()> {
1411 let Some(window) = self.get_window(window) else {
1412 log::error!("bug: Failed to get window for XIM preedit");
1413 return None;
1414 };
1415
1416 let mut state = self.0.borrow_mut();
1417 let (mut ximc, mut xim_handler) = state.take_xim()?;
1418 state.composing = !text.is_empty();
1419 drop(state);
1420 window.handle_ime_preedit(text);
1421
1422 if let Some(area) = window.get_ime_area() {
1423 let ic_attributes = ximc
1424 .build_ic_attributes()
1425 .push(
1426 xim::AttributeName::InputStyle,
1427 xim::InputStyle::PREEDIT_CALLBACKS,
1428 )
1429 .push(xim::AttributeName::ClientWindow, xim_handler.window)
1430 .push(xim::AttributeName::FocusWindow, xim_handler.window)
1431 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
1432 b.push(
1433 xim::AttributeName::SpotLocation,
1434 xim::Point {
1435 x: u32::from(area.origin.x + area.size.width) as i16,
1436 y: u32::from(area.origin.y + area.size.height) as i16,
1437 },
1438 );
1439 })
1440 .build();
1441 ximc.set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
1442 .ok();
1443 }
1444 let mut state = self.0.borrow_mut();
1445 state.restore_xim(ximc, xim_handler);
1446 drop(state);
1447 Some(())
1448 }
1449
1450 fn handle_keyboard_layout_change(&self) {
1451 let mut state = self.0.borrow_mut();
1452 let layout_idx = state.xkb.serialize_layout(STATE_LAYOUT_EFFECTIVE);
1453 let keymap = state.xkb.get_keymap();
1454 let layout_name = keymap.layout_get_name(layout_idx);
1455 if layout_name != state.keyboard_layout.name() {
1456 state.keyboard_layout = LinuxKeyboardLayout::new(layout_name.to_string().into());
1457 if let Some(mut callback) = state.common.callbacks.keyboard_layout_change.take() {
1458 drop(state);
1459 callback();
1460 state = self.0.borrow_mut();
1461 state.common.callbacks.keyboard_layout_change = Some(callback);
1462 }
1463 }
1464 }
1465}
1466
1467impl LinuxClient for X11Client {
1468 fn compositor_name(&self) -> &'static str {
1469 "X11"
1470 }
1471
1472 fn with_common<R>(&self, f: impl FnOnce(&mut LinuxCommon) -> R) -> R {
1473 f(&mut self.0.borrow_mut().common)
1474 }
1475
1476 fn keyboard_layout(&self) -> Box<dyn PlatformKeyboardLayout> {
1477 let state = self.0.borrow();
1478 Box::new(state.keyboard_layout.clone())
1479 }
1480
1481 fn displays(&self) -> Vec<Rc<dyn PlatformDisplay>> {
1482 let state = self.0.borrow();
1483 let setup = state.xcb_connection.setup();
1484 setup
1485 .roots
1486 .iter()
1487 .enumerate()
1488 .filter_map(|(root_id, _)| {
1489 Some(Rc::new(
1490 X11Display::new(&state.xcb_connection, state.scale_factor, root_id).ok()?,
1491 ) as Rc<dyn PlatformDisplay>)
1492 })
1493 .collect()
1494 }
1495
1496 fn primary_display(&self) -> Option<Rc<dyn PlatformDisplay>> {
1497 let state = self.0.borrow();
1498 X11Display::new(
1499 &state.xcb_connection,
1500 state.scale_factor,
1501 state.x_root_index,
1502 )
1503 .log_err()
1504 .map(|display| Rc::new(display) as Rc<dyn PlatformDisplay>)
1505 }
1506
1507 fn display(&self, id: DisplayId) -> Option<Rc<dyn PlatformDisplay>> {
1508 let state = self.0.borrow();
1509
1510 Some(Rc::new(
1511 X11Display::new(&state.xcb_connection, state.scale_factor, id.0 as usize).ok()?,
1512 ))
1513 }
1514
1515 #[cfg(feature = "screen-capture")]
1516 fn is_screen_capture_supported(&self) -> bool {
1517 true
1518 }
1519
1520 #[cfg(feature = "screen-capture")]
1521 fn screen_capture_sources(
1522 &self,
1523 ) -> futures::channel::oneshot::Receiver<anyhow::Result<Vec<Box<dyn crate::ScreenCaptureSource>>>>
1524 {
1525 crate::platform::scap_screen_capture::scap_screen_sources(
1526 &self.0.borrow().common.foreground_executor,
1527 )
1528 }
1529
1530 fn open_window(
1531 &self,
1532 handle: AnyWindowHandle,
1533 params: WindowParams,
1534 ) -> anyhow::Result<Box<dyn PlatformWindow>> {
1535 let mut state = self.0.borrow_mut();
1536 let x_window = state
1537 .xcb_connection
1538 .generate_id()
1539 .context("X11: Failed to generate window ID")?;
1540
1541 let window = X11Window::new(
1542 handle,
1543 X11ClientStatePtr(Rc::downgrade(&self.0)),
1544 state.common.foreground_executor.clone(),
1545 &state.gpu_context,
1546 params,
1547 &state.xcb_connection,
1548 state.client_side_decorations_supported,
1549 state.x_root_index,
1550 x_window,
1551 &state.atoms,
1552 state.scale_factor,
1553 state.common.appearance,
1554 )?;
1555 check_reply(
1556 || "Failed to set XdndAware property",
1557 state.xcb_connection.change_property32(
1558 xproto::PropMode::REPLACE,
1559 x_window,
1560 state.atoms.XdndAware,
1561 state.atoms.XA_ATOM,
1562 &[5],
1563 ),
1564 )
1565 .log_err();
1566 xcb_flush(&state.xcb_connection);
1567
1568 let window_ref = WindowRef {
1569 window: window.0.clone(),
1570 refresh_state: None,
1571 expose_event_received: false,
1572 last_visibility: Visibility::UNOBSCURED,
1573 is_mapped: false,
1574 };
1575
1576 state.windows.insert(x_window, window_ref);
1577 Ok(Box::new(window))
1578 }
1579
1580 fn set_cursor_style(&self, style: CursorStyle) {
1581 let mut state = self.0.borrow_mut();
1582 let Some(focused_window) = state.mouse_focused_window else {
1583 return;
1584 };
1585 let current_style = state
1586 .cursor_styles
1587 .get(&focused_window)
1588 .unwrap_or(&CursorStyle::Arrow);
1589 if *current_style == style {
1590 return;
1591 }
1592
1593 let Some(cursor) = state.get_cursor_icon(style) else {
1594 return;
1595 };
1596
1597 state.cursor_styles.insert(focused_window, style);
1598 check_reply(
1599 || "Failed to set cursor style",
1600 state.xcb_connection.change_window_attributes(
1601 focused_window,
1602 &ChangeWindowAttributesAux {
1603 cursor: Some(cursor),
1604 ..Default::default()
1605 },
1606 ),
1607 )
1608 .log_err();
1609 state.xcb_connection.flush().log_err();
1610 }
1611
1612 fn open_uri(&self, uri: &str) {
1613 #[cfg(any(feature = "wayland", feature = "x11"))]
1614 open_uri_internal(self.background_executor(), uri, None);
1615 }
1616
1617 fn reveal_path(&self, path: PathBuf) {
1618 #[cfg(any(feature = "x11", feature = "wayland"))]
1619 reveal_path_internal(self.background_executor(), path, None);
1620 }
1621
1622 fn write_to_primary(&self, item: crate::ClipboardItem) {
1623 let state = self.0.borrow_mut();
1624 state
1625 .clipboard
1626 .set_text(
1627 std::borrow::Cow::Owned(item.text().unwrap_or_default()),
1628 clipboard::ClipboardKind::Primary,
1629 clipboard::WaitConfig::None,
1630 )
1631 .context("X11 Failed to write to clipboard (primary)")
1632 .log_with_level(log::Level::Debug);
1633 }
1634
1635 fn write_to_clipboard(&self, item: crate::ClipboardItem) {
1636 let mut state = self.0.borrow_mut();
1637 state
1638 .clipboard
1639 .set_text(
1640 std::borrow::Cow::Owned(item.text().unwrap_or_default()),
1641 clipboard::ClipboardKind::Clipboard,
1642 clipboard::WaitConfig::None,
1643 )
1644 .context("X11: Failed to write to clipboard (clipboard)")
1645 .log_with_level(log::Level::Debug);
1646 state.clipboard_item.replace(item);
1647 }
1648
1649 fn read_from_primary(&self) -> Option<crate::ClipboardItem> {
1650 let state = self.0.borrow_mut();
1651 return state
1652 .clipboard
1653 .get_any(clipboard::ClipboardKind::Primary)
1654 .context("X11: Failed to read from clipboard (primary)")
1655 .log_with_level(log::Level::Debug);
1656 }
1657
1658 fn read_from_clipboard(&self) -> Option<crate::ClipboardItem> {
1659 let state = self.0.borrow_mut();
1660 // if the last copy was from this app, return our cached item
1661 // which has metadata attached.
1662 if state
1663 .clipboard
1664 .is_owner(clipboard::ClipboardKind::Clipboard)
1665 {
1666 return state.clipboard_item.clone();
1667 }
1668 return state
1669 .clipboard
1670 .get_any(clipboard::ClipboardKind::Clipboard)
1671 .context("X11: Failed to read from clipboard (clipboard)")
1672 .log_with_level(log::Level::Debug);
1673 }
1674
1675 fn run(&self) {
1676 let Some(mut event_loop) = self
1677 .0
1678 .borrow_mut()
1679 .event_loop
1680 .take()
1681 .context("X11Client::run called but it's already running")
1682 .log_err()
1683 else {
1684 return;
1685 };
1686
1687 event_loop.run(None, &mut self.clone(), |_| {}).log_err();
1688 }
1689
1690 fn active_window(&self) -> Option<AnyWindowHandle> {
1691 let state = self.0.borrow();
1692 state.keyboard_focused_window.and_then(|focused_window| {
1693 state
1694 .windows
1695 .get(&focused_window)
1696 .map(|window| window.handle())
1697 })
1698 }
1699
1700 fn window_stack(&self) -> Option<Vec<AnyWindowHandle>> {
1701 let state = self.0.borrow();
1702 let root = state.xcb_connection.setup().roots[state.x_root_index].root;
1703
1704 let reply = state
1705 .xcb_connection
1706 .get_property(
1707 false,
1708 root,
1709 state.atoms._NET_CLIENT_LIST_STACKING,
1710 xproto::AtomEnum::WINDOW,
1711 0,
1712 u32::MAX,
1713 )
1714 .ok()?
1715 .reply()
1716 .ok()?;
1717
1718 let window_ids = reply
1719 .value
1720 .chunks_exact(4)
1721 .filter_map(|chunk| chunk.try_into().ok().map(u32::from_ne_bytes))
1722 .collect::<Vec<xproto::Window>>();
1723
1724 let mut handles = Vec::new();
1725
1726 // We need to reverse, since _NET_CLIENT_LIST_STACKING has
1727 // a back-to-front order.
1728 // See: https://specifications.freedesktop.org/wm-spec/1.3/ar01s03.html
1729 for window_ref in window_ids
1730 .iter()
1731 .rev()
1732 .filter_map(|&win| state.windows.get(&win))
1733 {
1734 if !window_ref.window.state.borrow().destroyed {
1735 handles.push(window_ref.handle());
1736 }
1737 }
1738
1739 Some(handles)
1740 }
1741}
1742
1743impl X11ClientState {
1744 fn has_xim(&self) -> bool {
1745 self.ximc.is_some() && self.xim_handler.is_some()
1746 }
1747
1748 fn take_xim(&mut self) -> Option<(X11rbClient<Rc<XCBConnection>>, XimHandler)> {
1749 let ximc = self
1750 .ximc
1751 .take()
1752 .ok_or(anyhow!("bug: XIM connection not set"))
1753 .log_err()?;
1754 if let Some(xim_handler) = self.xim_handler.take() {
1755 Some((ximc, xim_handler))
1756 } else {
1757 self.ximc = Some(ximc);
1758 log::error!("bug: XIM handler not set");
1759 None
1760 }
1761 }
1762
1763 fn restore_xim(&mut self, ximc: X11rbClient<Rc<XCBConnection>>, xim_handler: XimHandler) {
1764 self.ximc = Some(ximc);
1765 self.xim_handler = Some(xim_handler);
1766 }
1767
1768 fn update_refresh_loop(&mut self, x_window: xproto::Window) {
1769 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1770 return;
1771 };
1772 let is_visible = window_ref.is_mapped
1773 && !matches!(window_ref.last_visibility, Visibility::FULLY_OBSCURED);
1774 match (is_visible, window_ref.refresh_state.take()) {
1775 (false, refresh_state @ Some(RefreshState::Hidden { .. }))
1776 | (false, refresh_state @ None)
1777 | (true, refresh_state @ Some(RefreshState::PeriodicRefresh { .. })) => {
1778 window_ref.refresh_state = refresh_state;
1779 }
1780 (
1781 false,
1782 Some(RefreshState::PeriodicRefresh {
1783 refresh_rate,
1784 event_loop_token,
1785 }),
1786 ) => {
1787 self.loop_handle.remove(event_loop_token);
1788 window_ref.refresh_state = Some(RefreshState::Hidden { refresh_rate });
1789 }
1790 (true, Some(RefreshState::Hidden { refresh_rate })) => {
1791 let event_loop_token = self.start_refresh_loop(x_window, refresh_rate);
1792 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1793 return;
1794 };
1795 window_ref.refresh_state = Some(RefreshState::PeriodicRefresh {
1796 refresh_rate,
1797 event_loop_token,
1798 });
1799 }
1800 (true, None) => {
1801 let Some(screen_resources) = get_reply(
1802 || "Failed to get screen resources",
1803 self.xcb_connection
1804 .randr_get_screen_resources_current(x_window),
1805 )
1806 .log_err() else {
1807 return;
1808 };
1809
1810 // Ideally this would be re-queried when the window changes screens, but there
1811 // doesn't seem to be an efficient / straightforward way to do this. Should also be
1812 // updated when screen configurations change.
1813 let mode_info = screen_resources.crtcs.iter().find_map(|crtc| {
1814 let crtc_info = self
1815 .xcb_connection
1816 .randr_get_crtc_info(*crtc, x11rb::CURRENT_TIME)
1817 .ok()?
1818 .reply()
1819 .ok()?;
1820
1821 screen_resources
1822 .modes
1823 .iter()
1824 .find(|m| m.id == crtc_info.mode)
1825 });
1826 let refresh_rate = match mode_info {
1827 Some(mode_info) => mode_refresh_rate(mode_info),
1828 None => {
1829 log::error!(
1830 "Failed to get screen mode info from xrandr, \
1831 defaulting to 60hz refresh rate."
1832 );
1833 Duration::from_micros(1_000_000 / 60)
1834 }
1835 };
1836
1837 let event_loop_token = self.start_refresh_loop(x_window, refresh_rate);
1838 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1839 return;
1840 };
1841 window_ref.refresh_state = Some(RefreshState::PeriodicRefresh {
1842 refresh_rate,
1843 event_loop_token,
1844 });
1845 }
1846 }
1847 }
1848
1849 #[must_use]
1850 fn start_refresh_loop(
1851 &self,
1852 x_window: xproto::Window,
1853 refresh_rate: Duration,
1854 ) -> RegistrationToken {
1855 self.loop_handle
1856 .insert_source(calloop::timer::Timer::immediate(), {
1857 move |mut instant, (), client| {
1858 let xcb_connection = {
1859 let mut state = client.0.borrow_mut();
1860 let xcb_connection = state.xcb_connection.clone();
1861 if let Some(window) = state.windows.get_mut(&x_window) {
1862 let expose_event_received = window.expose_event_received;
1863 window.expose_event_received = false;
1864 let window = window.window.clone();
1865 drop(state);
1866 window.refresh(RequestFrameOptions {
1867 require_presentation: expose_event_received,
1868 });
1869 }
1870 xcb_connection
1871 };
1872 client.process_x11_events(&xcb_connection).log_err();
1873
1874 // Take into account that some frames have been skipped
1875 let now = Instant::now();
1876 while instant < now {
1877 instant += refresh_rate;
1878 }
1879 calloop::timer::TimeoutAction::ToInstant(instant)
1880 }
1881 })
1882 .expect("Failed to initialize window refresh timer")
1883 }
1884
1885 fn get_cursor_icon(&mut self, style: CursorStyle) -> Option<xproto::Cursor> {
1886 if let Some(cursor) = self.cursor_cache.get(&style) {
1887 return *cursor;
1888 }
1889
1890 let mut result;
1891 match style {
1892 CursorStyle::None => match create_invisible_cursor(&self.xcb_connection) {
1893 Ok(loaded_cursor) => result = Ok(loaded_cursor),
1894 Err(err) => result = Err(err.context("X11: error while creating invisible cursor")),
1895 },
1896 _ => 'outer: {
1897 let mut errors = String::new();
1898 let cursor_icon_names = style.to_icon_names();
1899 for cursor_icon_name in cursor_icon_names {
1900 match self
1901 .cursor_handle
1902 .load_cursor(&self.xcb_connection, cursor_icon_name)
1903 {
1904 Ok(loaded_cursor) => {
1905 if loaded_cursor != x11rb::NONE {
1906 result = Ok(loaded_cursor);
1907 break 'outer;
1908 }
1909 }
1910 Err(err) => {
1911 errors.push_str(&err.to_string());
1912 errors.push('\n');
1913 }
1914 }
1915 }
1916 if errors.is_empty() {
1917 result = Err(anyhow!(
1918 "errors while loading cursor icons {:?}:\n{}",
1919 cursor_icon_names,
1920 errors
1921 ));
1922 } else {
1923 result = Err(anyhow!("did not find cursor icons {:?}", cursor_icon_names));
1924 }
1925 }
1926 };
1927
1928 let cursor = match result {
1929 Ok(cursor) => Some(cursor),
1930 Err(err) => {
1931 match self
1932 .cursor_handle
1933 .load_cursor(&self.xcb_connection, DEFAULT_CURSOR_ICON_NAME)
1934 {
1935 Ok(default) => {
1936 log_cursor_icon_warning(err.context(format!(
1937 "X11: error loading cursor icon, falling back on default icon '{}'",
1938 DEFAULT_CURSOR_ICON_NAME
1939 )));
1940 Some(default)
1941 }
1942 Err(default_err) => {
1943 log_cursor_icon_warning(err.context(default_err).context(format!(
1944 "X11: error loading default cursor fallback '{}'",
1945 DEFAULT_CURSOR_ICON_NAME
1946 )));
1947 None
1948 }
1949 }
1950 }
1951 };
1952
1953 self.cursor_cache.insert(style, cursor);
1954 cursor
1955 }
1956}
1957
1958// Adapted from:
1959// https://docs.rs/winit/0.29.11/src/winit/platform_impl/linux/x11/monitor.rs.html#103-111
1960pub fn mode_refresh_rate(mode: &randr::ModeInfo) -> Duration {
1961 if mode.dot_clock == 0 || mode.htotal == 0 || mode.vtotal == 0 {
1962 return Duration::from_millis(16);
1963 }
1964
1965 let millihertz = mode.dot_clock as u64 * 1_000 / (mode.htotal as u64 * mode.vtotal as u64);
1966 let micros = 1_000_000_000 / millihertz;
1967 log::info!("Refreshing every {}ms", micros / 1_000);
1968 Duration::from_micros(micros)
1969}
1970
1971fn fp3232_to_f32(value: xinput::Fp3232) -> f32 {
1972 value.integral as f32 + value.frac as f32 / u32::MAX as f32
1973}
1974
1975fn check_compositor_present(xcb_connection: &XCBConnection, root: u32) -> bool {
1976 // Method 1: Check for _NET_WM_CM_S{root}
1977 let atom_name = format!("_NET_WM_CM_S{}", root);
1978 let atom1 = get_reply(
1979 || format!("Failed to intern {atom_name}"),
1980 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1981 );
1982 let method1 = match atom1.log_with_level(Level::Debug) {
1983 Some(reply) if reply.atom != x11rb::NONE => {
1984 let atom = reply.atom;
1985 get_reply(
1986 || format!("Failed to get {atom_name} owner"),
1987 xcb_connection.get_selection_owner(atom),
1988 )
1989 .map(|reply| reply.owner != 0)
1990 .log_with_level(Level::Debug)
1991 .unwrap_or(false)
1992 }
1993 _ => false,
1994 };
1995
1996 // Method 2: Check for _NET_WM_CM_OWNER
1997 let atom_name = "_NET_WM_CM_OWNER";
1998 let atom2 = get_reply(
1999 || format!("Failed to intern {atom_name}"),
2000 xcb_connection.intern_atom(false, atom_name.as_bytes()),
2001 );
2002 let method2 = match atom2.log_with_level(Level::Debug) {
2003 Some(reply) if reply.atom != x11rb::NONE => {
2004 let atom = reply.atom;
2005 get_reply(
2006 || format!("Failed to get {atom_name}"),
2007 xcb_connection.get_property(false, root, atom, xproto::AtomEnum::WINDOW, 0, 1),
2008 )
2009 .map(|reply| reply.value_len > 0)
2010 .unwrap_or(false)
2011 }
2012 _ => return false,
2013 };
2014
2015 // Method 3: Check for _NET_SUPPORTING_WM_CHECK
2016 let atom_name = "_NET_SUPPORTING_WM_CHECK";
2017 let atom3 = get_reply(
2018 || format!("Failed to intern {atom_name}"),
2019 xcb_connection.intern_atom(false, atom_name.as_bytes()),
2020 );
2021 let method3 = match atom3.log_with_level(Level::Debug) {
2022 Some(reply) if reply.atom != x11rb::NONE => {
2023 let atom = reply.atom;
2024 get_reply(
2025 || format!("Failed to get {atom_name}"),
2026 xcb_connection.get_property(false, root, atom, xproto::AtomEnum::WINDOW, 0, 1),
2027 )
2028 .map(|reply| reply.value_len > 0)
2029 .unwrap_or(false)
2030 }
2031 _ => return false,
2032 };
2033
2034 log::debug!(
2035 "Compositor detection: _NET_WM_CM_S?={}, _NET_WM_CM_OWNER={}, _NET_SUPPORTING_WM_CHECK={}",
2036 method1,
2037 method2,
2038 method3
2039 );
2040
2041 method1 || method2 || method3
2042}
2043
2044fn check_gtk_frame_extents_supported(
2045 xcb_connection: &XCBConnection,
2046 atoms: &XcbAtoms,
2047 root: xproto::Window,
2048) -> bool {
2049 let Some(supported_atoms) = get_reply(
2050 || "Failed to get _NET_SUPPORTED",
2051 xcb_connection.get_property(
2052 false,
2053 root,
2054 atoms._NET_SUPPORTED,
2055 xproto::AtomEnum::ATOM,
2056 0,
2057 1024,
2058 ),
2059 )
2060 .log_with_level(Level::Debug) else {
2061 return false;
2062 };
2063
2064 let supported_atom_ids: Vec<u32> = supported_atoms
2065 .value
2066 .chunks_exact(4)
2067 .filter_map(|chunk| chunk.try_into().ok().map(u32::from_ne_bytes))
2068 .collect();
2069
2070 supported_atom_ids.contains(&atoms._GTK_FRAME_EXTENTS)
2071}
2072
2073fn xdnd_is_atom_supported(atom: u32, atoms: &XcbAtoms) -> bool {
2074 return atom == atoms.TEXT
2075 || atom == atoms.STRING
2076 || atom == atoms.UTF8_STRING
2077 || atom == atoms.TEXT_PLAIN
2078 || atom == atoms.TEXT_PLAIN_UTF8
2079 || atom == atoms.TextUriList;
2080}
2081
2082fn xdnd_get_supported_atom(
2083 xcb_connection: &XCBConnection,
2084 supported_atoms: &XcbAtoms,
2085 target: xproto::Window,
2086) -> u32 {
2087 if let Some(reply) = get_reply(
2088 || "Failed to get XDnD supported atoms",
2089 xcb_connection.get_property(
2090 false,
2091 target,
2092 supported_atoms.XdndTypeList,
2093 AtomEnum::ANY,
2094 0,
2095 1024,
2096 ),
2097 )
2098 .log_with_level(Level::Warn)
2099 {
2100 if let Some(atoms) = reply.value32() {
2101 for atom in atoms {
2102 if xdnd_is_atom_supported(atom, &supported_atoms) {
2103 return atom;
2104 }
2105 }
2106 }
2107 }
2108 return 0;
2109}
2110
2111fn xdnd_send_finished(
2112 xcb_connection: &XCBConnection,
2113 atoms: &XcbAtoms,
2114 source: xproto::Window,
2115 target: xproto::Window,
2116) {
2117 let message = ClientMessageEvent {
2118 format: 32,
2119 window: target,
2120 type_: atoms.XdndFinished,
2121 data: ClientMessageData::from([source, 1, atoms.XdndActionCopy, 0, 0]),
2122 sequence: 0,
2123 response_type: xproto::CLIENT_MESSAGE_EVENT,
2124 };
2125 check_reply(
2126 || "Failed to send XDnD finished event",
2127 xcb_connection.send_event(false, target, EventMask::default(), message),
2128 )
2129 .log_err();
2130 xcb_connection.flush().log_err();
2131}
2132
2133fn xdnd_send_status(
2134 xcb_connection: &XCBConnection,
2135 atoms: &XcbAtoms,
2136 source: xproto::Window,
2137 target: xproto::Window,
2138 action: u32,
2139) {
2140 let message = ClientMessageEvent {
2141 format: 32,
2142 window: target,
2143 type_: atoms.XdndStatus,
2144 data: ClientMessageData::from([source, 1, 0, 0, action]),
2145 sequence: 0,
2146 response_type: xproto::CLIENT_MESSAGE_EVENT,
2147 };
2148 check_reply(
2149 || "Failed to send XDnD status event",
2150 xcb_connection.send_event(false, target, EventMask::default(), message),
2151 )
2152 .log_err();
2153 xcb_connection.flush().log_err();
2154}
2155
2156/// Recomputes `pointer_device_states` by querying all pointer devices.
2157/// When a device is present in `scroll_values_to_preserve`, its value for `ScrollAxisState.scroll_value` is used.
2158fn current_pointer_device_states(
2159 xcb_connection: &XCBConnection,
2160 scroll_values_to_preserve: &BTreeMap<xinput::DeviceId, PointerDeviceState>,
2161) -> Option<BTreeMap<xinput::DeviceId, PointerDeviceState>> {
2162 let devices_query_result = get_reply(
2163 || "Failed to query XInput devices",
2164 xcb_connection.xinput_xi_query_device(XINPUT_ALL_DEVICES),
2165 )
2166 .log_err()?;
2167
2168 let mut pointer_device_states = BTreeMap::new();
2169 pointer_device_states.extend(
2170 devices_query_result
2171 .infos
2172 .iter()
2173 .filter(|info| is_pointer_device(info.type_))
2174 .filter_map(|info| {
2175 let scroll_data = info
2176 .classes
2177 .iter()
2178 .filter_map(|class| class.data.as_scroll())
2179 .map(|class| *class)
2180 .rev()
2181 .collect::<Vec<_>>();
2182 let old_state = scroll_values_to_preserve.get(&info.deviceid);
2183 let old_horizontal = old_state.map(|state| &state.horizontal);
2184 let old_vertical = old_state.map(|state| &state.vertical);
2185 let horizontal = scroll_data
2186 .iter()
2187 .find(|data| data.scroll_type == xinput::ScrollType::HORIZONTAL)
2188 .map(|data| scroll_data_to_axis_state(data, old_horizontal));
2189 let vertical = scroll_data
2190 .iter()
2191 .find(|data| data.scroll_type == xinput::ScrollType::VERTICAL)
2192 .map(|data| scroll_data_to_axis_state(data, old_vertical));
2193 if horizontal.is_none() && vertical.is_none() {
2194 None
2195 } else {
2196 Some((
2197 info.deviceid,
2198 PointerDeviceState {
2199 horizontal: horizontal.unwrap_or_else(Default::default),
2200 vertical: vertical.unwrap_or_else(Default::default),
2201 },
2202 ))
2203 }
2204 }),
2205 );
2206 if pointer_device_states.is_empty() {
2207 log::error!("Found no xinput mouse pointers.");
2208 }
2209 return Some(pointer_device_states);
2210}
2211
2212/// Returns true if the device is a pointer device. Does not include pointer device groups.
2213fn is_pointer_device(type_: xinput::DeviceType) -> bool {
2214 type_ == xinput::DeviceType::SLAVE_POINTER
2215}
2216
2217fn scroll_data_to_axis_state(
2218 data: &xinput::DeviceClassDataScroll,
2219 old_axis_state_with_valid_scroll_value: Option<&ScrollAxisState>,
2220) -> ScrollAxisState {
2221 ScrollAxisState {
2222 valuator_number: Some(data.number),
2223 multiplier: SCROLL_LINES / fp3232_to_f32(data.increment),
2224 scroll_value: old_axis_state_with_valid_scroll_value.and_then(|state| state.scroll_value),
2225 }
2226}
2227
2228fn reset_all_pointer_device_scroll_positions(
2229 pointer_device_states: &mut BTreeMap<xinput::DeviceId, PointerDeviceState>,
2230) {
2231 pointer_device_states
2232 .iter_mut()
2233 .for_each(|(_, device_state)| reset_pointer_device_scroll_positions(device_state));
2234}
2235
2236fn reset_pointer_device_scroll_positions(pointer: &mut PointerDeviceState) {
2237 pointer.horizontal.scroll_value = None;
2238 pointer.vertical.scroll_value = None;
2239}
2240
2241/// Returns the scroll delta for a smooth scrolling motion event, or `None` if no scroll data is present.
2242fn get_scroll_delta_and_update_state(
2243 pointer: &mut PointerDeviceState,
2244 event: &xinput::MotionEvent,
2245) -> Option<Point<f32>> {
2246 let delta_x = get_axis_scroll_delta_and_update_state(event, &mut pointer.horizontal);
2247 let delta_y = get_axis_scroll_delta_and_update_state(event, &mut pointer.vertical);
2248 if delta_x.is_some() || delta_y.is_some() {
2249 Some(Point::new(delta_x.unwrap_or(0.0), delta_y.unwrap_or(0.0)))
2250 } else {
2251 None
2252 }
2253}
2254
2255fn get_axis_scroll_delta_and_update_state(
2256 event: &xinput::MotionEvent,
2257 axis: &mut ScrollAxisState,
2258) -> Option<f32> {
2259 let axis_index = get_valuator_axis_index(&event.valuator_mask, axis.valuator_number?)?;
2260 if let Some(axis_value) = event.axisvalues.get(axis_index) {
2261 let new_scroll = fp3232_to_f32(*axis_value);
2262 let delta_scroll = axis
2263 .scroll_value
2264 .map(|old_scroll| (old_scroll - new_scroll) * axis.multiplier);
2265 axis.scroll_value = Some(new_scroll);
2266 delta_scroll
2267 } else {
2268 log::error!("Encountered invalid XInput valuator_mask, scrolling may not work properly.");
2269 None
2270 }
2271}
2272
2273fn make_scroll_wheel_event(
2274 position: Point<Pixels>,
2275 scroll_delta: Point<f32>,
2276 modifiers: Modifiers,
2277) -> crate::ScrollWheelEvent {
2278 // When shift is held down, vertical scrolling turns into horizontal scrolling.
2279 let delta = if modifiers.shift {
2280 Point {
2281 x: scroll_delta.y,
2282 y: 0.0,
2283 }
2284 } else {
2285 scroll_delta
2286 };
2287 crate::ScrollWheelEvent {
2288 position,
2289 delta: ScrollDelta::Lines(delta),
2290 modifiers,
2291 touch_phase: TouchPhase::default(),
2292 }
2293}
2294
2295fn create_invisible_cursor(
2296 connection: &XCBConnection,
2297) -> anyhow::Result<crate::platform::linux::x11::client::xproto::Cursor> {
2298 let empty_pixmap = connection.generate_id()?;
2299 let root = connection.setup().roots[0].root;
2300 connection.create_pixmap(1, empty_pixmap, root, 1, 1)?;
2301
2302 let cursor = connection.generate_id()?;
2303 connection.create_cursor(cursor, empty_pixmap, empty_pixmap, 0, 0, 0, 0, 0, 0, 0, 0)?;
2304
2305 connection.free_pixmap(empty_pixmap)?;
2306
2307 xcb_flush(connection);
2308 Ok(cursor)
2309}
2310
2311fn update_keyboard_mapper(
2312 client: &mut X11ClientState,
2313 keyboard_layout: LinuxKeyboardLayout,
2314 base_group: u32,
2315 latched_group: u32,
2316 locked_group: u32,
2317) {
2318 let id = keyboard_layout.id().to_string();
2319 let mapper = client
2320 .keyboard_mapper_cache
2321 .entry(id)
2322 .or_insert(Rc::new(LinuxKeyboardMapper::new(
2323 base_group,
2324 latched_group,
2325 locked_group,
2326 )))
2327 .clone();
2328
2329 client.keyboard_mapper = mapper;
2330 client.keyboard_layout = Box::new(keyboard_layout);
2331}