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