1use crate::{Capslock, xcb_flush};
2use anyhow::{Context as _, anyhow};
3use calloop::{
4 EventLoop, LoopHandle, RegistrationToken,
5 generic::{FdWrapper, Generic},
6};
7use collections::HashMap;
8use core::str;
9use http_client::Url;
10use log::Level;
11use smallvec::SmallVec;
12use std::{
13 cell::RefCell,
14 collections::{BTreeMap, HashSet},
15 ops::Deref,
16 path::PathBuf,
17 rc::{Rc, Weak},
18 time::{Duration, Instant},
19};
20use util::ResultExt;
21
22use x11rb::{
23 connection::{Connection, RequestConnection},
24 cursor,
25 errors::ConnectionError,
26 protocol::randr::ConnectionExt as _,
27 protocol::xinput::ConnectionExt,
28 protocol::xkb::ConnectionExt as _,
29 protocol::xproto::{
30 AtomEnum, ChangeWindowAttributesAux, ClientMessageData, ClientMessageEvent,
31 ConnectionExt as _, EventMask, KeyPressEvent, Visibility,
32 },
33 protocol::{Event, randr, render, xinput, xkb, xproto},
34 resource_manager::Database,
35 wrapper::ConnectionExt as _,
36 xcb_ffi::XCBConnection,
37};
38use xim::{AttributeName, Client, InputStyle, x11rb::X11rbClient};
39use xkbc::x11::ffi::{XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION};
40use xkbcommon::xkb::{self as xkbc, STATE_LAYOUT_EFFECTIVE};
41
42use super::{
43 ButtonOrScroll, ScrollDirection, X11Display, X11WindowStatePtr, XcbAtoms, XimCallbackEvent,
44 XimHandler, button_or_scroll_from_event_detail, check_reply,
45 clipboard::{self, Clipboard},
46 get_reply, get_valuator_axis_index, handle_connection_error, modifiers_from_state,
47 pressed_button_from_mask,
48};
49
50use crate::platform::{
51 LinuxCommon, PlatformWindow,
52 blade::BladeContext,
53 linux::{
54 DEFAULT_CURSOR_ICON_NAME, LinuxClient, get_xkb_compose_state, is_within_click_distance,
55 log_cursor_icon_warning, open_uri_internal,
56 platform::{DOUBLE_CLICK_INTERVAL, SCROLL_LINES},
57 reveal_path_internal,
58 xdg_desktop_portal::{Event as XDPEvent, XDPEventSource},
59 },
60};
61use crate::{
62 AnyWindowHandle, Bounds, ClipboardItem, CursorStyle, DisplayId, FileDropEvent, Keystroke,
63 LinuxKeyboardLayout, Modifiers, ModifiersChangedEvent, MouseButton, Pixels, Platform,
64 PlatformDisplay, PlatformInput, PlatformKeyboardLayout, Point, RequestFrameOptions,
65 ScaledPixels, ScrollDelta, Size, TouchPhase, WindowParams, X11Window,
66 modifiers_from_xinput_info, point, px,
67};
68
69/// Value for DeviceId parameters which selects all devices.
70pub(crate) const XINPUT_ALL_DEVICES: xinput::DeviceId = 0;
71
72/// Value for DeviceId parameters which selects all device groups. Events that
73/// occur within the group are emitted by the group itself.
74///
75/// In XInput 2's interface, these are referred to as "master devices", but that
76/// terminology is both archaic and unclear.
77pub(crate) const XINPUT_ALL_DEVICE_GROUPS: xinput::DeviceId = 1;
78
79const GPUI_X11_SCALE_FACTOR_ENV: &str = "GPUI_X11_SCALE_FACTOR";
80
81pub(crate) struct WindowRef {
82 window: X11WindowStatePtr,
83 refresh_state: Option<RefreshState>,
84 expose_event_received: bool,
85 last_visibility: Visibility,
86 is_mapped: bool,
87}
88
89impl WindowRef {
90 pub fn handle(&self) -> AnyWindowHandle {
91 self.window.state.borrow().handle
92 }
93}
94
95impl Deref for WindowRef {
96 type Target = X11WindowStatePtr;
97
98 fn deref(&self) -> &Self::Target {
99 &self.window
100 }
101}
102
103enum RefreshState {
104 Hidden {
105 refresh_rate: Duration,
106 },
107 PeriodicRefresh {
108 refresh_rate: Duration,
109 event_loop_token: RegistrationToken,
110 },
111}
112
113#[derive(Debug)]
114#[non_exhaustive]
115pub enum EventHandlerError {
116 XCBConnectionError(ConnectionError),
117 XIMClientError(xim::ClientError),
118}
119
120impl std::error::Error for EventHandlerError {}
121
122impl std::fmt::Display for EventHandlerError {
123 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
124 match self {
125 EventHandlerError::XCBConnectionError(err) => err.fmt(f),
126 EventHandlerError::XIMClientError(err) => err.fmt(f),
127 }
128 }
129}
130
131impl From<ConnectionError> for EventHandlerError {
132 fn from(err: ConnectionError) -> Self {
133 EventHandlerError::XCBConnectionError(err)
134 }
135}
136
137impl From<xim::ClientError> for EventHandlerError {
138 fn from(err: xim::ClientError) -> Self {
139 EventHandlerError::XIMClientError(err)
140 }
141}
142
143#[derive(Debug, Default)]
144pub struct Xdnd {
145 other_window: xproto::Window,
146 drag_type: u32,
147 retrieved: bool,
148 position: Point<Pixels>,
149}
150
151#[derive(Debug)]
152struct PointerDeviceState {
153 horizontal: ScrollAxisState,
154 vertical: ScrollAxisState,
155}
156
157#[derive(Debug, Default)]
158struct ScrollAxisState {
159 /// Valuator number for looking up this axis's scroll value.
160 valuator_number: Option<u16>,
161 /// Conversion factor from scroll units to lines.
162 multiplier: f32,
163 /// Last scroll value for calculating scroll delta.
164 ///
165 /// This gets set to `None` whenever it might be invalid - when devices change or when window focus changes.
166 /// The logic errs on the side of invalidating this, since the consequence is just skipping the delta of one scroll event.
167 /// The consequence of not invalidating it can be large invalid deltas, which are much more user visible.
168 scroll_value: Option<f32>,
169}
170
171pub struct X11ClientState {
172 pub(crate) loop_handle: LoopHandle<'static, X11Client>,
173 pub(crate) event_loop: Option<calloop::EventLoop<'static, X11Client>>,
174
175 pub(crate) last_click: Instant,
176 pub(crate) last_mouse_button: Option<MouseButton>,
177 pub(crate) last_location: Point<Pixels>,
178 pub(crate) current_count: usize,
179
180 gpu_context: BladeContext,
181
182 pub(crate) scale_factor: f32,
183
184 xkb_context: xkbc::Context,
185 pub(crate) xcb_connection: Rc<XCBConnection>,
186 xkb_device_id: i32,
187 client_side_decorations_supported: bool,
188 pub(crate) x_root_index: usize,
189 pub(crate) _resource_database: Database,
190 pub(crate) atoms: XcbAtoms,
191 pub(crate) windows: HashMap<xproto::Window, WindowRef>,
192 pub(crate) mouse_focused_window: Option<xproto::Window>,
193 pub(crate) keyboard_focused_window: Option<xproto::Window>,
194 pub(crate) xkb: xkbc::State,
195 keyboard_layout: LinuxKeyboardLayout,
196 pub(crate) ximc: Option<X11rbClient<Rc<XCBConnection>>>,
197 pub(crate) xim_handler: Option<XimHandler>,
198 pub modifiers: Modifiers,
199 pub capslock: Capslock,
200 // TODO: Can the other updates to `modifiers` be removed so that this is unnecessary?
201 // capslock logic was done analog to modifiers
202 pub last_modifiers_changed_event: Modifiers,
203 pub last_capslock_changed_event: Capslock,
204
205 pub(crate) compose_state: Option<xkbc::compose::State>,
206 pub(crate) pre_edit_text: Option<String>,
207 pub(crate) composing: bool,
208 pub(crate) pre_key_char_down: Option<Keystroke>,
209 pub(crate) cursor_handle: cursor::Handle,
210 pub(crate) cursor_styles: HashMap<xproto::Window, CursorStyle>,
211 pub(crate) cursor_cache: HashMap<CursorStyle, Option<xproto::Cursor>>,
212
213 pointer_device_states: BTreeMap<xinput::DeviceId, PointerDeviceState>,
214
215 pub(crate) common: LinuxCommon,
216 pub(crate) clipboard: Clipboard,
217 pub(crate) clipboard_item: Option<ClipboardItem>,
218 pub(crate) xdnd_state: Xdnd,
219}
220
221#[derive(Clone)]
222pub struct X11ClientStatePtr(pub Weak<RefCell<X11ClientState>>);
223
224impl X11ClientStatePtr {
225 fn get_client(&self) -> Option<X11Client> {
226 self.0.upgrade().map(X11Client)
227 }
228
229 pub fn drop_window(&self, x_window: u32) {
230 let Some(client) = self.get_client() else {
231 return;
232 };
233 let mut state = client.0.borrow_mut();
234
235 if let Some(window_ref) = state.windows.remove(&x_window) {
236 match window_ref.refresh_state {
237 Some(RefreshState::PeriodicRefresh {
238 event_loop_token, ..
239 }) => {
240 state.loop_handle.remove(event_loop_token);
241 }
242 _ => {}
243 }
244 }
245 if state.mouse_focused_window == Some(x_window) {
246 state.mouse_focused_window = None;
247 }
248 if state.keyboard_focused_window == Some(x_window) {
249 state.keyboard_focused_window = None;
250 }
251 state.cursor_styles.remove(&x_window);
252
253 if state.windows.is_empty() {
254 state.common.signal.stop();
255 }
256 }
257
258 pub fn update_ime_position(&self, bounds: Bounds<ScaledPixels>) {
259 let Some(client) = self.get_client() else {
260 return;
261 };
262 let mut state = client.0.borrow_mut();
263 if state.composing || state.ximc.is_none() {
264 return;
265 }
266
267 let Some(mut ximc) = state.ximc.take() else {
268 log::error!("bug: xim connection not set");
269 return;
270 };
271 let Some(xim_handler) = state.xim_handler.take() else {
272 log::error!("bug: xim handler not set");
273 state.ximc = Some(ximc);
274 return;
275 };
276 let ic_attributes = ximc
277 .build_ic_attributes()
278 .push(
279 xim::AttributeName::InputStyle,
280 xim::InputStyle::PREEDIT_CALLBACKS,
281 )
282 .push(xim::AttributeName::ClientWindow, xim_handler.window)
283 .push(xim::AttributeName::FocusWindow, xim_handler.window)
284 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
285 b.push(
286 xim::AttributeName::SpotLocation,
287 xim::Point {
288 x: u32::from(bounds.origin.x + bounds.size.width) as i16,
289 y: u32::from(bounds.origin.y + bounds.size.height) as i16,
290 },
291 );
292 })
293 .build();
294 let _ = ximc
295 .set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
296 .log_err();
297 state.ximc = Some(ximc);
298 state.xim_handler = Some(xim_handler);
299 }
300}
301
302#[derive(Clone)]
303pub(crate) struct X11Client(Rc<RefCell<X11ClientState>>);
304
305impl X11Client {
306 pub(crate) fn new() -> anyhow::Result<Self> {
307 let event_loop = EventLoop::try_new()?;
308
309 let (common, main_receiver) = LinuxCommon::new(event_loop.get_signal());
310
311 let handle = event_loop.handle();
312
313 handle
314 .insert_source(main_receiver, {
315 let handle = handle.clone();
316 move |event, _, _: &mut X11Client| {
317 if let calloop::channel::Event::Msg(runnable) = event {
318 // Insert the runnables as idle callbacks, so we make sure that user-input and X11
319 // events have higher priority and runnables are only worked off after the event
320 // callbacks.
321 handle.insert_idle(|_| {
322 runnable.run();
323 });
324 }
325 }
326 })
327 .map_err(|err| {
328 anyhow!("Failed to initialize event loop handling of foreground tasks: {err:?}")
329 })?;
330
331 let (xcb_connection, x_root_index) = XCBConnection::connect(None)?;
332 xcb_connection.prefetch_extension_information(xkb::X11_EXTENSION_NAME)?;
333 xcb_connection.prefetch_extension_information(randr::X11_EXTENSION_NAME)?;
334 xcb_connection.prefetch_extension_information(render::X11_EXTENSION_NAME)?;
335 xcb_connection.prefetch_extension_information(xinput::X11_EXTENSION_NAME)?;
336
337 // Announce to X server that XInput up to 2.1 is supported. To increase this to 2.2 and
338 // beyond, support for touch events would need to be added.
339 let xinput_version = get_reply(
340 || "XInput XiQueryVersion failed",
341 xcb_connection.xinput_xi_query_version(2, 1),
342 )?;
343 assert!(
344 xinput_version.major_version >= 2,
345 "XInput version >= 2 required."
346 );
347
348 let pointer_device_states =
349 current_pointer_device_states(&xcb_connection, &BTreeMap::new()).unwrap_or_default();
350
351 let atoms = XcbAtoms::new(&xcb_connection)
352 .context("Failed to get XCB atoms")?
353 .reply()
354 .context("Failed to get XCB atoms")?;
355
356 let root = xcb_connection.setup().roots[0].root;
357 let compositor_present = check_compositor_present(&xcb_connection, root);
358 let gtk_frame_extents_supported =
359 check_gtk_frame_extents_supported(&xcb_connection, &atoms, root);
360 let client_side_decorations_supported = compositor_present && gtk_frame_extents_supported;
361 log::info!(
362 "x11: compositor present: {}, gtk_frame_extents_supported: {}",
363 compositor_present,
364 gtk_frame_extents_supported
365 );
366
367 let xkb = get_reply(
368 || "Failed to initialize XKB extension",
369 xcb_connection
370 .xkb_use_extension(XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION),
371 )?;
372 assert!(xkb.supported);
373
374 let events = xkb::EventType::STATE_NOTIFY
375 | xkb::EventType::MAP_NOTIFY
376 | xkb::EventType::NEW_KEYBOARD_NOTIFY;
377 let map_notify_parts = xkb::MapPart::KEY_TYPES
378 | xkb::MapPart::KEY_SYMS
379 | xkb::MapPart::MODIFIER_MAP
380 | xkb::MapPart::EXPLICIT_COMPONENTS
381 | xkb::MapPart::KEY_ACTIONS
382 | xkb::MapPart::KEY_BEHAVIORS
383 | xkb::MapPart::VIRTUAL_MODS
384 | xkb::MapPart::VIRTUAL_MOD_MAP;
385 check_reply(
386 || "Failed to select XKB events",
387 xcb_connection.xkb_select_events(
388 xkb::ID::USE_CORE_KBD.into(),
389 0u8.into(),
390 events,
391 map_notify_parts,
392 map_notify_parts,
393 &xkb::SelectEventsAux::new(),
394 ),
395 )?;
396
397 let xkb_context = xkbc::Context::new(xkbc::CONTEXT_NO_FLAGS);
398 let xkb_device_id = xkbc::x11::get_core_keyboard_device_id(&xcb_connection);
399 let xkb_state = {
400 let xkb_keymap = xkbc::x11::keymap_new_from_device(
401 &xkb_context,
402 &xcb_connection,
403 xkb_device_id,
404 xkbc::KEYMAP_COMPILE_NO_FLAGS,
405 );
406 xkbc::x11::state_new_from_device(&xkb_keymap, &xcb_connection, xkb_device_id)
407 };
408 let compose_state = get_xkb_compose_state(&xkb_context);
409 let layout_idx = xkb_state.serialize_layout(STATE_LAYOUT_EFFECTIVE);
410 let layout_name = xkb_state
411 .get_keymap()
412 .layout_get_name(layout_idx)
413 .to_string();
414 let keyboard_layout = LinuxKeyboardLayout::new(layout_name.into());
415
416 let gpu_context = BladeContext::new().context("Unable to init GPU context")?;
417
418 let resource_database = x11rb::resource_manager::new_from_default(&xcb_connection)
419 .context("Failed to create resource database")?;
420 let scale_factor = get_scale_factor(&xcb_connection, &resource_database, x_root_index);
421 let cursor_handle = cursor::Handle::new(&xcb_connection, x_root_index, &resource_database)
422 .context("Failed to initialize cursor theme handler")?
423 .reply()
424 .context("Failed to initialize cursor theme handler")?;
425
426 let clipboard = Clipboard::new().context("Failed to initialize clipboard")?;
427
428 let xcb_connection = Rc::new(xcb_connection);
429
430 let ximc = X11rbClient::init(Rc::clone(&xcb_connection), x_root_index, None).ok();
431 let xim_handler = if ximc.is_some() {
432 Some(XimHandler::new())
433 } else {
434 None
435 };
436
437 // Safety: Safe if xcb::Connection always returns a valid fd
438 let fd = unsafe { FdWrapper::new(Rc::clone(&xcb_connection)) };
439
440 handle
441 .insert_source(
442 Generic::new_with_error::<EventHandlerError>(
443 fd,
444 calloop::Interest::READ,
445 calloop::Mode::Level,
446 ),
447 {
448 let xcb_connection = xcb_connection.clone();
449 move |_readiness, _, client| {
450 client.process_x11_events(&xcb_connection)?;
451 Ok(calloop::PostAction::Continue)
452 }
453 },
454 )
455 .map_err(|err| anyhow!("Failed to initialize X11 event source: {err:?}"))?;
456
457 handle
458 .insert_source(XDPEventSource::new(&common.background_executor), {
459 move |event, _, client| match event {
460 XDPEvent::WindowAppearance(appearance) => {
461 client.with_common(|common| common.appearance = appearance);
462 for (_, window) in &mut client.0.borrow_mut().windows {
463 window.window.set_appearance(appearance);
464 }
465 }
466 XDPEvent::CursorTheme(_) | XDPEvent::CursorSize(_) => {
467 // noop, X11 manages this for us.
468 }
469 }
470 })
471 .map_err(|err| anyhow!("Failed to initialize XDP event source: {err:?}"))?;
472
473 xcb_flush(&xcb_connection);
474
475 Ok(X11Client(Rc::new(RefCell::new(X11ClientState {
476 modifiers: Modifiers::default(),
477 capslock: Capslock::default(),
478 last_modifiers_changed_event: Modifiers::default(),
479 last_capslock_changed_event: Capslock::default(),
480 event_loop: Some(event_loop),
481 loop_handle: handle,
482 common,
483 last_click: Instant::now(),
484 last_mouse_button: None,
485 last_location: Point::new(px(0.0), px(0.0)),
486 current_count: 0,
487 gpu_context,
488 scale_factor,
489
490 xkb_context,
491 xcb_connection,
492 xkb_device_id,
493 client_side_decorations_supported,
494 x_root_index,
495 _resource_database: resource_database,
496 atoms,
497 windows: HashMap::default(),
498 mouse_focused_window: None,
499 keyboard_focused_window: None,
500 xkb: xkb_state,
501 keyboard_layout,
502 ximc,
503 xim_handler,
504
505 compose_state,
506 pre_edit_text: None,
507 pre_key_char_down: None,
508 composing: false,
509
510 cursor_handle,
511 cursor_styles: HashMap::default(),
512 cursor_cache: HashMap::default(),
513
514 pointer_device_states,
515
516 clipboard,
517 clipboard_item: None,
518 xdnd_state: Xdnd::default(),
519 }))))
520 }
521
522 pub fn process_x11_events(
523 &self,
524 xcb_connection: &XCBConnection,
525 ) -> Result<(), EventHandlerError> {
526 loop {
527 let mut events = Vec::new();
528 let mut windows_to_refresh = HashSet::new();
529
530 let mut last_key_release = None;
531 let mut last_key_press: Option<KeyPressEvent> = None;
532
533 // event handlers for new keyboard / remapping refresh the state without using event
534 // details, this deduplicates them.
535 let mut last_keymap_change_event: Option<Event> = None;
536
537 loop {
538 match xcb_connection.poll_for_event() {
539 Ok(Some(event)) => {
540 match event {
541 Event::Expose(expose_event) => {
542 windows_to_refresh.insert(expose_event.window);
543 }
544 Event::KeyRelease(_) => {
545 if let Some(last_keymap_change_event) =
546 last_keymap_change_event.take()
547 {
548 if let Some(last_key_release) = last_key_release.take() {
549 events.push(last_key_release);
550 }
551 last_key_press = None;
552 events.push(last_keymap_change_event);
553 }
554
555 last_key_release = Some(event);
556 }
557 Event::KeyPress(key_press) => {
558 if let Some(last_keymap_change_event) =
559 last_keymap_change_event.take()
560 {
561 if let Some(last_key_release) = last_key_release.take() {
562 events.push(last_key_release);
563 }
564 last_key_press = None;
565 events.push(last_keymap_change_event);
566 }
567
568 if let Some(last_press) = last_key_press.as_ref() {
569 if last_press.detail == key_press.detail {
570 continue;
571 }
572 }
573
574 if let Some(Event::KeyRelease(key_release)) =
575 last_key_release.take()
576 {
577 // We ignore that last KeyRelease if it's too close to this KeyPress,
578 // suggesting that it's auto-generated by X11 as a key-repeat event.
579 if key_release.detail != key_press.detail
580 || key_press.time.saturating_sub(key_release.time) > 20
581 {
582 events.push(Event::KeyRelease(key_release));
583 }
584 }
585 events.push(Event::KeyPress(key_press));
586 last_key_press = Some(key_press);
587 }
588 Event::XkbNewKeyboardNotify(_) | Event::XkbMapNotify(_) => {
589 if let Some(release_event) = last_key_release.take() {
590 events.push(release_event);
591 }
592 last_keymap_change_event = Some(event);
593 }
594 _ => {
595 if let Some(release_event) = last_key_release.take() {
596 events.push(release_event);
597 }
598 events.push(event);
599 }
600 }
601 }
602 Ok(None) => {
603 break;
604 }
605 Err(err) => {
606 let err = handle_connection_error(err);
607 log::warn!("error while polling for X11 events: {err:?}");
608 break;
609 }
610 }
611 }
612
613 if let Some(release_event) = last_key_release.take() {
614 events.push(release_event);
615 }
616 if let Some(keymap_change_event) = last_keymap_change_event.take() {
617 events.push(keymap_change_event);
618 }
619
620 if events.is_empty() && windows_to_refresh.is_empty() {
621 break;
622 }
623
624 for window in windows_to_refresh.into_iter() {
625 let mut state = self.0.borrow_mut();
626 if let Some(window) = state.windows.get_mut(&window) {
627 window.expose_event_received = true;
628 }
629 }
630
631 for event in events.into_iter() {
632 let mut state = self.0.borrow_mut();
633 if !state.has_xim() {
634 drop(state);
635 self.handle_event(event);
636 continue;
637 }
638
639 let Some((mut ximc, mut xim_handler)) = state.take_xim() else {
640 continue;
641 };
642 let xim_connected = xim_handler.connected;
643 drop(state);
644
645 let xim_filtered = match ximc.filter_event(&event, &mut xim_handler) {
646 Ok(handled) => handled,
647 Err(err) => {
648 log::error!("XIMClientError: {}", err);
649 false
650 }
651 };
652 let xim_callback_event = xim_handler.last_callback_event.take();
653
654 let mut state = self.0.borrow_mut();
655 state.restore_xim(ximc, xim_handler);
656 drop(state);
657
658 if let Some(event) = xim_callback_event {
659 self.handle_xim_callback_event(event);
660 }
661
662 if xim_filtered {
663 continue;
664 }
665
666 if xim_connected {
667 self.xim_handle_event(event);
668 } else {
669 self.handle_event(event);
670 }
671 }
672 }
673 Ok(())
674 }
675
676 pub fn enable_ime(&self) {
677 let mut state = self.0.borrow_mut();
678 if !state.has_xim() {
679 return;
680 }
681
682 let Some((mut ximc, mut xim_handler)) = state.take_xim() else {
683 return;
684 };
685 let mut ic_attributes = ximc
686 .build_ic_attributes()
687 .push(AttributeName::InputStyle, InputStyle::PREEDIT_CALLBACKS)
688 .push(AttributeName::ClientWindow, xim_handler.window)
689 .push(AttributeName::FocusWindow, xim_handler.window);
690
691 let window_id = state.keyboard_focused_window;
692 drop(state);
693 if let Some(window_id) = window_id {
694 let Some(window) = self.get_window(window_id) else {
695 log::error!("Failed to get window for IME positioning");
696 let mut state = self.0.borrow_mut();
697 state.ximc = Some(ximc);
698 state.xim_handler = Some(xim_handler);
699 return;
700 };
701 if let Some(area) = window.get_ime_area() {
702 ic_attributes =
703 ic_attributes.nested_list(xim::AttributeName::PreeditAttributes, |b| {
704 b.push(
705 xim::AttributeName::SpotLocation,
706 xim::Point {
707 x: u32::from(area.origin.x + area.size.width) as i16,
708 y: u32::from(area.origin.y + area.size.height) as i16,
709 },
710 );
711 });
712 }
713 }
714 ximc.create_ic(xim_handler.im_id, ic_attributes.build())
715 .ok();
716 let mut state = self.0.borrow_mut();
717 state.restore_xim(ximc, xim_handler);
718 }
719
720 pub fn reset_ime(&self) {
721 let mut state = self.0.borrow_mut();
722 state.composing = false;
723 if let Some(mut ximc) = state.ximc.take() {
724 if let Some(xim_handler) = state.xim_handler.as_ref() {
725 ximc.reset_ic(xim_handler.im_id, xim_handler.ic_id).ok();
726 } else {
727 log::error!("bug: xim handler not set in reset_ime");
728 }
729 state.ximc = Some(ximc);
730 }
731 }
732
733 fn get_window(&self, win: xproto::Window) -> Option<X11WindowStatePtr> {
734 let state = self.0.borrow();
735 state
736 .windows
737 .get(&win)
738 .filter(|window_reference| !window_reference.window.state.borrow().destroyed)
739 .map(|window_reference| window_reference.window.clone())
740 }
741
742 fn handle_event(&self, event: Event) -> Option<()> {
743 match event {
744 Event::UnmapNotify(event) => {
745 let mut state = self.0.borrow_mut();
746 if let Some(window_ref) = state.windows.get_mut(&event.window) {
747 window_ref.is_mapped = false;
748 }
749 state.update_refresh_loop(event.window);
750 }
751 Event::MapNotify(event) => {
752 let mut state = self.0.borrow_mut();
753 if let Some(window_ref) = state.windows.get_mut(&event.window) {
754 window_ref.is_mapped = true;
755 }
756 state.update_refresh_loop(event.window);
757 }
758 Event::VisibilityNotify(event) => {
759 let mut state = self.0.borrow_mut();
760 if let Some(window_ref) = state.windows.get_mut(&event.window) {
761 window_ref.last_visibility = event.state;
762 }
763 state.update_refresh_loop(event.window);
764 }
765 Event::ClientMessage(event) => {
766 let window = self.get_window(event.window)?;
767 let [atom, arg1, arg2, arg3, arg4] = event.data.as_data32();
768 let mut state = self.0.borrow_mut();
769
770 if atom == state.atoms.WM_DELETE_WINDOW {
771 // window "x" button clicked by user
772 if window.should_close() {
773 // Rest of the close logic is handled in drop_window()
774 window.close();
775 }
776 } else if atom == state.atoms._NET_WM_SYNC_REQUEST {
777 window.state.borrow_mut().last_sync_counter =
778 Some(x11rb::protocol::sync::Int64 {
779 lo: arg2,
780 hi: arg3 as i32,
781 })
782 }
783
784 if event.type_ == state.atoms.XdndEnter {
785 state.xdnd_state.other_window = atom;
786 if (arg1 & 0x1) == 0x1 {
787 state.xdnd_state.drag_type = xdnd_get_supported_atom(
788 &state.xcb_connection,
789 &state.atoms,
790 state.xdnd_state.other_window,
791 );
792 } else {
793 if let Some(atom) = [arg2, arg3, arg4]
794 .into_iter()
795 .find(|atom| xdnd_is_atom_supported(*atom, &state.atoms))
796 {
797 state.xdnd_state.drag_type = atom;
798 }
799 }
800 } else if event.type_ == state.atoms.XdndLeave {
801 let position = state.xdnd_state.position;
802 drop(state);
803 window
804 .handle_input(PlatformInput::FileDrop(FileDropEvent::Pending { position }));
805 window.handle_input(PlatformInput::FileDrop(FileDropEvent::Exited {}));
806 self.0.borrow_mut().xdnd_state = Xdnd::default();
807 } else if event.type_ == state.atoms.XdndPosition {
808 if let Ok(pos) = get_reply(
809 || "Failed to query pointer position",
810 state.xcb_connection.query_pointer(event.window),
811 ) {
812 state.xdnd_state.position =
813 Point::new(Pixels(pos.win_x as f32), Pixels(pos.win_y as f32));
814 }
815 if !state.xdnd_state.retrieved {
816 check_reply(
817 || "Failed to convert selection for drag and drop",
818 state.xcb_connection.convert_selection(
819 event.window,
820 state.atoms.XdndSelection,
821 state.xdnd_state.drag_type,
822 state.atoms.XDND_DATA,
823 arg3,
824 ),
825 )
826 .log_err();
827 }
828 xdnd_send_status(
829 &state.xcb_connection,
830 &state.atoms,
831 event.window,
832 state.xdnd_state.other_window,
833 arg4,
834 );
835 let position = state.xdnd_state.position;
836 drop(state);
837 window
838 .handle_input(PlatformInput::FileDrop(FileDropEvent::Pending { position }));
839 } else if event.type_ == state.atoms.XdndDrop {
840 xdnd_send_finished(
841 &state.xcb_connection,
842 &state.atoms,
843 event.window,
844 state.xdnd_state.other_window,
845 );
846 let position = state.xdnd_state.position;
847 drop(state);
848 window
849 .handle_input(PlatformInput::FileDrop(FileDropEvent::Submit { position }));
850 self.0.borrow_mut().xdnd_state = Xdnd::default();
851 }
852 }
853 Event::SelectionNotify(event) => {
854 let window = self.get_window(event.requestor)?;
855 let mut state = self.0.borrow_mut();
856 let reply = get_reply(
857 || "Failed to get XDND_DATA",
858 state.xcb_connection.get_property(
859 false,
860 event.requestor,
861 state.atoms.XDND_DATA,
862 AtomEnum::ANY,
863 0,
864 1024,
865 ),
866 )
867 .log_err();
868 let Some(reply) = reply else {
869 return Some(());
870 };
871 match str::from_utf8(&reply.value) {
872 Ok(file_list) => {
873 let paths: SmallVec<[_; 2]> = file_list
874 .lines()
875 .filter_map(|path| Url::parse(path).log_err())
876 .filter_map(|url| url.to_file_path().log_err())
877 .collect();
878 let input = PlatformInput::FileDrop(FileDropEvent::Entered {
879 position: state.xdnd_state.position,
880 paths: crate::ExternalPaths(paths),
881 });
882 drop(state);
883 window.handle_input(input);
884 self.0.borrow_mut().xdnd_state.retrieved = true;
885 }
886 Err(_) => {}
887 }
888 }
889 Event::ConfigureNotify(event) => {
890 let bounds = Bounds {
891 origin: Point {
892 x: event.x.into(),
893 y: event.y.into(),
894 },
895 size: Size {
896 width: event.width.into(),
897 height: event.height.into(),
898 },
899 };
900 let window = self.get_window(event.window)?;
901 window
902 .set_bounds(bounds)
903 .context("X11: Failed to set window bounds")
904 .log_err();
905 }
906 Event::PropertyNotify(event) => {
907 let window = self.get_window(event.window)?;
908 window
909 .property_notify(event)
910 .context("X11: Failed to handle property notify")
911 .log_err();
912 }
913 Event::FocusIn(event) => {
914 let window = self.get_window(event.event)?;
915 window.set_active(true);
916 let mut state = self.0.borrow_mut();
917 state.keyboard_focused_window = Some(event.event);
918 if let Some(handler) = state.xim_handler.as_mut() {
919 handler.window = event.event;
920 }
921 drop(state);
922 self.enable_ime();
923 }
924 Event::FocusOut(event) => {
925 let window = self.get_window(event.event)?;
926 window.set_active(false);
927 let mut state = self.0.borrow_mut();
928 state.keyboard_focused_window = None;
929 if let Some(compose_state) = state.compose_state.as_mut() {
930 compose_state.reset();
931 }
932 state.pre_edit_text.take();
933 drop(state);
934 self.reset_ime();
935 window.handle_ime_delete();
936 }
937 Event::XkbNewKeyboardNotify(_) | Event::XkbMapNotify(_) => {
938 let mut state = self.0.borrow_mut();
939 let xkb_state = {
940 let xkb_keymap = xkbc::x11::keymap_new_from_device(
941 &state.xkb_context,
942 &state.xcb_connection,
943 state.xkb_device_id,
944 xkbc::KEYMAP_COMPILE_NO_FLAGS,
945 );
946 xkbc::x11::state_new_from_device(
947 &xkb_keymap,
948 &state.xcb_connection,
949 state.xkb_device_id,
950 )
951 };
952 state.xkb = xkb_state;
953 drop(state);
954 self.handle_keyboard_layout_change();
955 }
956 Event::XkbStateNotify(event) => {
957 let mut state = self.0.borrow_mut();
958 let old_layout = state.xkb.serialize_layout(STATE_LAYOUT_EFFECTIVE);
959 let new_layout = u32::from(event.group);
960 state.xkb.update_mask(
961 event.base_mods.into(),
962 event.latched_mods.into(),
963 event.locked_mods.into(),
964 event.base_group as u32,
965 event.latched_group as u32,
966 event.locked_group.into(),
967 );
968 let modifiers = Modifiers::from_xkb(&state.xkb);
969 let capslock = Capslock::from_xkb(&state.xkb);
970 if state.last_modifiers_changed_event == modifiers
971 && state.last_capslock_changed_event == capslock
972 {
973 drop(state);
974 } else {
975 let focused_window_id = state.keyboard_focused_window?;
976 state.modifiers = modifiers;
977 state.last_modifiers_changed_event = modifiers;
978 state.capslock = capslock;
979 state.last_capslock_changed_event = capslock;
980 drop(state);
981
982 let focused_window = self.get_window(focused_window_id)?;
983 focused_window.handle_input(PlatformInput::ModifiersChanged(
984 ModifiersChangedEvent {
985 modifiers,
986 capslock,
987 },
988 ));
989 }
990
991 if new_layout != old_layout {
992 self.handle_keyboard_layout_change();
993 }
994 }
995 Event::KeyPress(event) => {
996 let window = self.get_window(event.event)?;
997 let mut state = self.0.borrow_mut();
998
999 let modifiers = modifiers_from_state(event.state);
1000 state.modifiers = modifiers;
1001 state.pre_key_char_down.take();
1002 let keystroke = {
1003 let code = event.detail.into();
1004 let mut keystroke = crate::Keystroke::from_xkb(&state.xkb, modifiers, code);
1005 let keysym = state.xkb.key_get_one_sym(code);
1006
1007 if keysym.is_modifier_key() {
1008 return Some(());
1009 }
1010
1011 // should be called after key_get_one_sym
1012 state.xkb.update_key(code, xkbc::KeyDirection::Down);
1013
1014 if let Some(mut compose_state) = state.compose_state.take() {
1015 compose_state.feed(keysym);
1016 match compose_state.status() {
1017 xkbc::Status::Composed => {
1018 state.pre_edit_text.take();
1019 keystroke.key_char = compose_state.utf8();
1020 if let Some(keysym) = compose_state.keysym() {
1021 keystroke.key = xkbc::keysym_get_name(keysym);
1022 }
1023 }
1024 xkbc::Status::Composing => {
1025 keystroke.key_char = None;
1026 state.pre_edit_text = compose_state
1027 .utf8()
1028 .or(crate::Keystroke::underlying_dead_key(keysym));
1029 let pre_edit =
1030 state.pre_edit_text.clone().unwrap_or(String::default());
1031 drop(state);
1032 window.handle_ime_preedit(pre_edit);
1033 state = self.0.borrow_mut();
1034 }
1035 xkbc::Status::Cancelled => {
1036 let pre_edit = state.pre_edit_text.take();
1037 drop(state);
1038 if let Some(pre_edit) = pre_edit {
1039 window.handle_ime_commit(pre_edit);
1040 }
1041 if let Some(current_key) = Keystroke::underlying_dead_key(keysym) {
1042 window.handle_ime_preedit(current_key);
1043 }
1044 state = self.0.borrow_mut();
1045 compose_state.feed(keysym);
1046 }
1047 _ => {}
1048 }
1049 state.compose_state = Some(compose_state);
1050 }
1051 keystroke
1052 };
1053 drop(state);
1054 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
1055 keystroke,
1056 is_held: false,
1057 }));
1058 }
1059 Event::KeyRelease(event) => {
1060 let window = self.get_window(event.event)?;
1061 let mut state = self.0.borrow_mut();
1062
1063 let modifiers = modifiers_from_state(event.state);
1064 state.modifiers = modifiers;
1065
1066 let keystroke = {
1067 let code = event.detail.into();
1068 let keystroke = crate::Keystroke::from_xkb(&state.xkb, modifiers, code);
1069 let keysym = state.xkb.key_get_one_sym(code);
1070
1071 if keysym.is_modifier_key() {
1072 return Some(());
1073 }
1074
1075 // should be called after key_get_one_sym
1076 state.xkb.update_key(code, xkbc::KeyDirection::Up);
1077
1078 keystroke
1079 };
1080 drop(state);
1081 window.handle_input(PlatformInput::KeyUp(crate::KeyUpEvent { keystroke }));
1082 }
1083 Event::XinputButtonPress(event) => {
1084 let window = self.get_window(event.event)?;
1085 let mut state = self.0.borrow_mut();
1086
1087 let modifiers = modifiers_from_xinput_info(event.mods);
1088 state.modifiers = modifiers;
1089
1090 let position = point(
1091 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1092 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1093 );
1094
1095 if state.composing && state.ximc.is_some() {
1096 drop(state);
1097 self.reset_ime();
1098 window.handle_ime_unmark();
1099 state = self.0.borrow_mut();
1100 } else if let Some(text) = state.pre_edit_text.take() {
1101 if let Some(compose_state) = state.compose_state.as_mut() {
1102 compose_state.reset();
1103 }
1104 drop(state);
1105 window.handle_ime_commit(text);
1106 state = self.0.borrow_mut();
1107 }
1108 match button_or_scroll_from_event_detail(event.detail) {
1109 Some(ButtonOrScroll::Button(button)) => {
1110 let click_elapsed = state.last_click.elapsed();
1111 if click_elapsed < DOUBLE_CLICK_INTERVAL
1112 && state
1113 .last_mouse_button
1114 .is_some_and(|prev_button| prev_button == button)
1115 && is_within_click_distance(state.last_location, position)
1116 {
1117 state.current_count += 1;
1118 } else {
1119 state.current_count = 1;
1120 }
1121
1122 state.last_click = Instant::now();
1123 state.last_mouse_button = Some(button);
1124 state.last_location = position;
1125 let current_count = state.current_count;
1126
1127 drop(state);
1128 window.handle_input(PlatformInput::MouseDown(crate::MouseDownEvent {
1129 button,
1130 position,
1131 modifiers,
1132 click_count: current_count,
1133 first_mouse: false,
1134 }));
1135 }
1136 Some(ButtonOrScroll::Scroll(direction)) => {
1137 drop(state);
1138 // Emulated scroll button presses are sent simultaneously with smooth scrolling XinputMotion events.
1139 // Since handling those events does the scrolling, they are skipped here.
1140 if !event
1141 .flags
1142 .contains(xinput::PointerEventFlags::POINTER_EMULATED)
1143 {
1144 let scroll_delta = match direction {
1145 ScrollDirection::Up => Point::new(0.0, SCROLL_LINES),
1146 ScrollDirection::Down => Point::new(0.0, -SCROLL_LINES),
1147 ScrollDirection::Left => Point::new(SCROLL_LINES, 0.0),
1148 ScrollDirection::Right => Point::new(-SCROLL_LINES, 0.0),
1149 };
1150 window.handle_input(PlatformInput::ScrollWheel(
1151 make_scroll_wheel_event(position, scroll_delta, modifiers),
1152 ));
1153 }
1154 }
1155 None => {
1156 log::error!("Unknown x11 button: {}", event.detail);
1157 }
1158 }
1159 }
1160 Event::XinputButtonRelease(event) => {
1161 let window = self.get_window(event.event)?;
1162 let mut state = self.0.borrow_mut();
1163 let modifiers = modifiers_from_xinput_info(event.mods);
1164 state.modifiers = modifiers;
1165
1166 let position = point(
1167 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1168 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1169 );
1170 match button_or_scroll_from_event_detail(event.detail) {
1171 Some(ButtonOrScroll::Button(button)) => {
1172 let click_count = state.current_count;
1173 drop(state);
1174 window.handle_input(PlatformInput::MouseUp(crate::MouseUpEvent {
1175 button,
1176 position,
1177 modifiers,
1178 click_count,
1179 }));
1180 }
1181 Some(ButtonOrScroll::Scroll(_)) => {}
1182 None => {}
1183 }
1184 }
1185 Event::XinputMotion(event) => {
1186 let window = self.get_window(event.event)?;
1187 let mut state = self.0.borrow_mut();
1188 let pressed_button = pressed_button_from_mask(event.button_mask[0]);
1189 let position = point(
1190 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1191 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1192 );
1193 let modifiers = modifiers_from_xinput_info(event.mods);
1194 state.modifiers = modifiers;
1195 drop(state);
1196
1197 if event.valuator_mask[0] & 3 != 0 {
1198 window.handle_input(PlatformInput::MouseMove(crate::MouseMoveEvent {
1199 position,
1200 pressed_button,
1201 modifiers,
1202 }));
1203 }
1204
1205 state = self.0.borrow_mut();
1206 if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
1207 let scroll_delta = get_scroll_delta_and_update_state(&mut pointer, &event);
1208 drop(state);
1209 if let Some(scroll_delta) = scroll_delta {
1210 window.handle_input(PlatformInput::ScrollWheel(make_scroll_wheel_event(
1211 position,
1212 scroll_delta,
1213 modifiers,
1214 )));
1215 }
1216 }
1217 }
1218 Event::XinputEnter(event) if event.mode == xinput::NotifyMode::NORMAL => {
1219 let window = self.get_window(event.event)?;
1220 window.set_hovered(true);
1221 let mut state = self.0.borrow_mut();
1222 state.mouse_focused_window = Some(event.event);
1223 }
1224 Event::XinputLeave(event) if event.mode == xinput::NotifyMode::NORMAL => {
1225 let mut state = self.0.borrow_mut();
1226
1227 // 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)
1228 reset_all_pointer_device_scroll_positions(&mut state.pointer_device_states);
1229 state.mouse_focused_window = None;
1230 let pressed_button = pressed_button_from_mask(event.buttons[0]);
1231 let position = point(
1232 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1233 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1234 );
1235 let modifiers = modifiers_from_xinput_info(event.mods);
1236 state.modifiers = modifiers;
1237 drop(state);
1238
1239 let window = self.get_window(event.event)?;
1240 window.handle_input(PlatformInput::MouseExited(crate::MouseExitEvent {
1241 pressed_button,
1242 position,
1243 modifiers,
1244 }));
1245 window.set_hovered(false);
1246 }
1247 Event::XinputHierarchy(event) => {
1248 let mut state = self.0.borrow_mut();
1249 // Temporarily use `state.pointer_device_states` to only store pointers that still have valid scroll values.
1250 // Any change to a device invalidates its scroll values.
1251 for info in event.infos {
1252 if is_pointer_device(info.type_) {
1253 state.pointer_device_states.remove(&info.deviceid);
1254 }
1255 }
1256 if let Some(pointer_device_states) = current_pointer_device_states(
1257 &state.xcb_connection,
1258 &state.pointer_device_states,
1259 ) {
1260 state.pointer_device_states = pointer_device_states;
1261 }
1262 }
1263 Event::XinputDeviceChanged(event) => {
1264 let mut state = self.0.borrow_mut();
1265 if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
1266 reset_pointer_device_scroll_positions(&mut pointer);
1267 }
1268 }
1269 _ => {}
1270 };
1271
1272 Some(())
1273 }
1274
1275 fn handle_xim_callback_event(&self, event: XimCallbackEvent) {
1276 match event {
1277 XimCallbackEvent::XimXEvent(event) => {
1278 self.handle_event(event);
1279 }
1280 XimCallbackEvent::XimCommitEvent(window, text) => {
1281 self.xim_handle_commit(window, text);
1282 }
1283 XimCallbackEvent::XimPreeditEvent(window, text) => {
1284 self.xim_handle_preedit(window, text);
1285 }
1286 };
1287 }
1288
1289 fn xim_handle_event(&self, event: Event) -> Option<()> {
1290 match event {
1291 Event::KeyPress(event) | Event::KeyRelease(event) => {
1292 let mut state = self.0.borrow_mut();
1293 state.pre_key_char_down = Some(Keystroke::from_xkb(
1294 &state.xkb,
1295 state.modifiers,
1296 event.detail.into(),
1297 ));
1298 let (mut ximc, mut xim_handler) = state.take_xim()?;
1299 drop(state);
1300 xim_handler.window = event.event;
1301 ximc.forward_event(
1302 xim_handler.im_id,
1303 xim_handler.ic_id,
1304 xim::ForwardEventFlag::empty(),
1305 &event,
1306 )
1307 .context("X11: Failed to forward XIM event")
1308 .log_err();
1309 let mut state = self.0.borrow_mut();
1310 state.restore_xim(ximc, xim_handler);
1311 drop(state);
1312 }
1313 event => {
1314 self.handle_event(event);
1315 }
1316 }
1317 Some(())
1318 }
1319
1320 fn xim_handle_commit(&self, window: xproto::Window, text: String) -> Option<()> {
1321 let Some(window) = self.get_window(window) else {
1322 log::error!("bug: Failed to get window for XIM commit");
1323 return None;
1324 };
1325 let mut state = self.0.borrow_mut();
1326 let keystroke = state.pre_key_char_down.take();
1327 state.composing = false;
1328 drop(state);
1329 if let Some(mut keystroke) = keystroke {
1330 keystroke.key_char = Some(text.clone());
1331 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
1332 keystroke,
1333 is_held: false,
1334 }));
1335 }
1336
1337 Some(())
1338 }
1339
1340 fn xim_handle_preedit(&self, window: xproto::Window, text: String) -> Option<()> {
1341 let Some(window) = self.get_window(window) else {
1342 log::error!("bug: Failed to get window for XIM preedit");
1343 return None;
1344 };
1345
1346 let mut state = self.0.borrow_mut();
1347 let (mut ximc, mut xim_handler) = state.take_xim()?;
1348 state.composing = !text.is_empty();
1349 drop(state);
1350 window.handle_ime_preedit(text);
1351
1352 if let Some(area) = window.get_ime_area() {
1353 let ic_attributes = ximc
1354 .build_ic_attributes()
1355 .push(
1356 xim::AttributeName::InputStyle,
1357 xim::InputStyle::PREEDIT_CALLBACKS,
1358 )
1359 .push(xim::AttributeName::ClientWindow, xim_handler.window)
1360 .push(xim::AttributeName::FocusWindow, xim_handler.window)
1361 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
1362 b.push(
1363 xim::AttributeName::SpotLocation,
1364 xim::Point {
1365 x: u32::from(area.origin.x + area.size.width) as i16,
1366 y: u32::from(area.origin.y + area.size.height) as i16,
1367 },
1368 );
1369 })
1370 .build();
1371 ximc.set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
1372 .ok();
1373 }
1374 let mut state = self.0.borrow_mut();
1375 state.restore_xim(ximc, xim_handler);
1376 drop(state);
1377 Some(())
1378 }
1379
1380 fn handle_keyboard_layout_change(&self) {
1381 let mut state = self.0.borrow_mut();
1382 let layout_idx = state.xkb.serialize_layout(STATE_LAYOUT_EFFECTIVE);
1383 let keymap = state.xkb.get_keymap();
1384 let layout_name = keymap.layout_get_name(layout_idx);
1385 if layout_name != state.keyboard_layout.name() {
1386 state.keyboard_layout = LinuxKeyboardLayout::new(layout_name.to_string().into());
1387 if let Some(mut callback) = state.common.callbacks.keyboard_layout_change.take() {
1388 drop(state);
1389 callback();
1390 state = self.0.borrow_mut();
1391 state.common.callbacks.keyboard_layout_change = Some(callback);
1392 }
1393 }
1394 }
1395}
1396
1397impl LinuxClient for X11Client {
1398 fn compositor_name(&self) -> &'static str {
1399 "X11"
1400 }
1401
1402 fn with_common<R>(&self, f: impl FnOnce(&mut LinuxCommon) -> R) -> R {
1403 f(&mut self.0.borrow_mut().common)
1404 }
1405
1406 fn keyboard_layout(&self) -> Box<dyn PlatformKeyboardLayout> {
1407 let state = self.0.borrow();
1408 Box::new(state.keyboard_layout.clone())
1409 }
1410
1411 fn displays(&self) -> Vec<Rc<dyn PlatformDisplay>> {
1412 let state = self.0.borrow();
1413 let setup = state.xcb_connection.setup();
1414 setup
1415 .roots
1416 .iter()
1417 .enumerate()
1418 .filter_map(|(root_id, _)| {
1419 Some(Rc::new(
1420 X11Display::new(&state.xcb_connection, state.scale_factor, root_id).ok()?,
1421 ) as Rc<dyn PlatformDisplay>)
1422 })
1423 .collect()
1424 }
1425
1426 fn primary_display(&self) -> Option<Rc<dyn PlatformDisplay>> {
1427 let state = self.0.borrow();
1428 X11Display::new(
1429 &state.xcb_connection,
1430 state.scale_factor,
1431 state.x_root_index,
1432 )
1433 .log_err()
1434 .map(|display| Rc::new(display) as Rc<dyn PlatformDisplay>)
1435 }
1436
1437 fn display(&self, id: DisplayId) -> Option<Rc<dyn PlatformDisplay>> {
1438 let state = self.0.borrow();
1439
1440 Some(Rc::new(
1441 X11Display::new(&state.xcb_connection, state.scale_factor, id.0 as usize).ok()?,
1442 ))
1443 }
1444
1445 #[cfg(feature = "screen-capture")]
1446 fn is_screen_capture_supported(&self) -> bool {
1447 true
1448 }
1449
1450 #[cfg(feature = "screen-capture")]
1451 fn screen_capture_sources(
1452 &self,
1453 ) -> futures::channel::oneshot::Receiver<anyhow::Result<Vec<Rc<dyn crate::ScreenCaptureSource>>>>
1454 {
1455 crate::platform::scap_screen_capture::scap_screen_sources(
1456 &self.0.borrow().common.foreground_executor,
1457 )
1458 }
1459
1460 fn open_window(
1461 &self,
1462 handle: AnyWindowHandle,
1463 params: WindowParams,
1464 ) -> anyhow::Result<Box<dyn PlatformWindow>> {
1465 let mut state = self.0.borrow_mut();
1466 let x_window = state
1467 .xcb_connection
1468 .generate_id()
1469 .context("X11: Failed to generate window ID")?;
1470
1471 let window = X11Window::new(
1472 handle,
1473 X11ClientStatePtr(Rc::downgrade(&self.0)),
1474 state.common.foreground_executor.clone(),
1475 &state.gpu_context,
1476 params,
1477 &state.xcb_connection,
1478 state.client_side_decorations_supported,
1479 state.x_root_index,
1480 x_window,
1481 &state.atoms,
1482 state.scale_factor,
1483 state.common.appearance,
1484 )?;
1485 check_reply(
1486 || "Failed to set XdndAware property",
1487 state.xcb_connection.change_property32(
1488 xproto::PropMode::REPLACE,
1489 x_window,
1490 state.atoms.XdndAware,
1491 state.atoms.XA_ATOM,
1492 &[5],
1493 ),
1494 )
1495 .log_err();
1496 xcb_flush(&state.xcb_connection);
1497
1498 let window_ref = WindowRef {
1499 window: window.0.clone(),
1500 refresh_state: None,
1501 expose_event_received: false,
1502 last_visibility: Visibility::UNOBSCURED,
1503 is_mapped: false,
1504 };
1505
1506 state.windows.insert(x_window, window_ref);
1507 Ok(Box::new(window))
1508 }
1509
1510 fn set_cursor_style(&self, style: CursorStyle) {
1511 let mut state = self.0.borrow_mut();
1512 let Some(focused_window) = state.mouse_focused_window else {
1513 return;
1514 };
1515 let current_style = state
1516 .cursor_styles
1517 .get(&focused_window)
1518 .unwrap_or(&CursorStyle::Arrow);
1519 if *current_style == style {
1520 return;
1521 }
1522
1523 let Some(cursor) = state.get_cursor_icon(style) else {
1524 return;
1525 };
1526
1527 state.cursor_styles.insert(focused_window, style);
1528 check_reply(
1529 || "Failed to set cursor style",
1530 state.xcb_connection.change_window_attributes(
1531 focused_window,
1532 &ChangeWindowAttributesAux {
1533 cursor: Some(cursor),
1534 ..Default::default()
1535 },
1536 ),
1537 )
1538 .log_err();
1539 state.xcb_connection.flush().log_err();
1540 }
1541
1542 fn open_uri(&self, uri: &str) {
1543 #[cfg(any(feature = "wayland", feature = "x11"))]
1544 open_uri_internal(self.background_executor(), uri, None);
1545 }
1546
1547 fn reveal_path(&self, path: PathBuf) {
1548 #[cfg(any(feature = "x11", feature = "wayland"))]
1549 reveal_path_internal(self.background_executor(), path, None);
1550 }
1551
1552 fn write_to_primary(&self, item: crate::ClipboardItem) {
1553 let state = self.0.borrow_mut();
1554 state
1555 .clipboard
1556 .set_text(
1557 std::borrow::Cow::Owned(item.text().unwrap_or_default()),
1558 clipboard::ClipboardKind::Primary,
1559 clipboard::WaitConfig::None,
1560 )
1561 .context("X11 Failed to write to clipboard (primary)")
1562 .log_with_level(log::Level::Debug);
1563 }
1564
1565 fn write_to_clipboard(&self, item: crate::ClipboardItem) {
1566 let mut state = self.0.borrow_mut();
1567 state
1568 .clipboard
1569 .set_text(
1570 std::borrow::Cow::Owned(item.text().unwrap_or_default()),
1571 clipboard::ClipboardKind::Clipboard,
1572 clipboard::WaitConfig::None,
1573 )
1574 .context("X11: Failed to write to clipboard (clipboard)")
1575 .log_with_level(log::Level::Debug);
1576 state.clipboard_item.replace(item);
1577 }
1578
1579 fn read_from_primary(&self) -> Option<crate::ClipboardItem> {
1580 let state = self.0.borrow_mut();
1581 return state
1582 .clipboard
1583 .get_any(clipboard::ClipboardKind::Primary)
1584 .context("X11: Failed to read from clipboard (primary)")
1585 .log_with_level(log::Level::Debug);
1586 }
1587
1588 fn read_from_clipboard(&self) -> Option<crate::ClipboardItem> {
1589 let state = self.0.borrow_mut();
1590 // if the last copy was from this app, return our cached item
1591 // which has metadata attached.
1592 if state
1593 .clipboard
1594 .is_owner(clipboard::ClipboardKind::Clipboard)
1595 {
1596 return state.clipboard_item.clone();
1597 }
1598 return state
1599 .clipboard
1600 .get_any(clipboard::ClipboardKind::Clipboard)
1601 .context("X11: Failed to read from clipboard (clipboard)")
1602 .log_with_level(log::Level::Debug);
1603 }
1604
1605 fn run(&self) {
1606 let Some(mut event_loop) = self
1607 .0
1608 .borrow_mut()
1609 .event_loop
1610 .take()
1611 .context("X11Client::run called but it's already running")
1612 .log_err()
1613 else {
1614 return;
1615 };
1616
1617 event_loop.run(None, &mut self.clone(), |_| {}).log_err();
1618 }
1619
1620 fn active_window(&self) -> Option<AnyWindowHandle> {
1621 let state = self.0.borrow();
1622 state.keyboard_focused_window.and_then(|focused_window| {
1623 state
1624 .windows
1625 .get(&focused_window)
1626 .map(|window| window.handle())
1627 })
1628 }
1629
1630 fn window_stack(&self) -> Option<Vec<AnyWindowHandle>> {
1631 let state = self.0.borrow();
1632 let root = state.xcb_connection.setup().roots[state.x_root_index].root;
1633
1634 let reply = state
1635 .xcb_connection
1636 .get_property(
1637 false,
1638 root,
1639 state.atoms._NET_CLIENT_LIST_STACKING,
1640 xproto::AtomEnum::WINDOW,
1641 0,
1642 u32::MAX,
1643 )
1644 .ok()?
1645 .reply()
1646 .ok()?;
1647
1648 let window_ids = reply
1649 .value
1650 .chunks_exact(4)
1651 .filter_map(|chunk| chunk.try_into().ok().map(u32::from_ne_bytes))
1652 .collect::<Vec<xproto::Window>>();
1653
1654 let mut handles = Vec::new();
1655
1656 // We need to reverse, since _NET_CLIENT_LIST_STACKING has
1657 // a back-to-front order.
1658 // See: https://specifications.freedesktop.org/wm-spec/1.3/ar01s03.html
1659 for window_ref in window_ids
1660 .iter()
1661 .rev()
1662 .filter_map(|&win| state.windows.get(&win))
1663 {
1664 if !window_ref.window.state.borrow().destroyed {
1665 handles.push(window_ref.handle());
1666 }
1667 }
1668
1669 Some(handles)
1670 }
1671}
1672
1673impl X11ClientState {
1674 fn has_xim(&self) -> bool {
1675 self.ximc.is_some() && self.xim_handler.is_some()
1676 }
1677
1678 fn take_xim(&mut self) -> Option<(X11rbClient<Rc<XCBConnection>>, XimHandler)> {
1679 let ximc = self
1680 .ximc
1681 .take()
1682 .ok_or(anyhow!("bug: XIM connection not set"))
1683 .log_err()?;
1684 if let Some(xim_handler) = self.xim_handler.take() {
1685 Some((ximc, xim_handler))
1686 } else {
1687 self.ximc = Some(ximc);
1688 log::error!("bug: XIM handler not set");
1689 None
1690 }
1691 }
1692
1693 fn restore_xim(&mut self, ximc: X11rbClient<Rc<XCBConnection>>, xim_handler: XimHandler) {
1694 self.ximc = Some(ximc);
1695 self.xim_handler = Some(xim_handler);
1696 }
1697
1698 fn update_refresh_loop(&mut self, x_window: xproto::Window) {
1699 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1700 return;
1701 };
1702 let is_visible = window_ref.is_mapped
1703 && !matches!(window_ref.last_visibility, Visibility::FULLY_OBSCURED);
1704 match (is_visible, window_ref.refresh_state.take()) {
1705 (false, refresh_state @ Some(RefreshState::Hidden { .. }))
1706 | (false, refresh_state @ None)
1707 | (true, refresh_state @ Some(RefreshState::PeriodicRefresh { .. })) => {
1708 window_ref.refresh_state = refresh_state;
1709 }
1710 (
1711 false,
1712 Some(RefreshState::PeriodicRefresh {
1713 refresh_rate,
1714 event_loop_token,
1715 }),
1716 ) => {
1717 self.loop_handle.remove(event_loop_token);
1718 window_ref.refresh_state = Some(RefreshState::Hidden { refresh_rate });
1719 }
1720 (true, Some(RefreshState::Hidden { refresh_rate })) => {
1721 let event_loop_token = self.start_refresh_loop(x_window, refresh_rate);
1722 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1723 return;
1724 };
1725 window_ref.refresh_state = Some(RefreshState::PeriodicRefresh {
1726 refresh_rate,
1727 event_loop_token,
1728 });
1729 }
1730 (true, None) => {
1731 let Some(screen_resources) = get_reply(
1732 || "Failed to get screen resources",
1733 self.xcb_connection
1734 .randr_get_screen_resources_current(x_window),
1735 )
1736 .log_err() else {
1737 return;
1738 };
1739
1740 // Ideally this would be re-queried when the window changes screens, but there
1741 // doesn't seem to be an efficient / straightforward way to do this. Should also be
1742 // updated when screen configurations change.
1743 let mode_info = screen_resources.crtcs.iter().find_map(|crtc| {
1744 let crtc_info = self
1745 .xcb_connection
1746 .randr_get_crtc_info(*crtc, x11rb::CURRENT_TIME)
1747 .ok()?
1748 .reply()
1749 .ok()?;
1750
1751 screen_resources
1752 .modes
1753 .iter()
1754 .find(|m| m.id == crtc_info.mode)
1755 });
1756 let refresh_rate = match mode_info {
1757 Some(mode_info) => mode_refresh_rate(mode_info),
1758 None => {
1759 log::error!(
1760 "Failed to get screen mode info from xrandr, \
1761 defaulting to 60hz refresh rate."
1762 );
1763 Duration::from_micros(1_000_000 / 60)
1764 }
1765 };
1766
1767 let event_loop_token = self.start_refresh_loop(x_window, refresh_rate);
1768 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1769 return;
1770 };
1771 window_ref.refresh_state = Some(RefreshState::PeriodicRefresh {
1772 refresh_rate,
1773 event_loop_token,
1774 });
1775 }
1776 }
1777 }
1778
1779 #[must_use]
1780 fn start_refresh_loop(
1781 &self,
1782 x_window: xproto::Window,
1783 refresh_rate: Duration,
1784 ) -> RegistrationToken {
1785 self.loop_handle
1786 .insert_source(calloop::timer::Timer::immediate(), {
1787 move |mut instant, (), client| {
1788 let xcb_connection = {
1789 let mut state = client.0.borrow_mut();
1790 let xcb_connection = state.xcb_connection.clone();
1791 if let Some(window) = state.windows.get_mut(&x_window) {
1792 let expose_event_received = window.expose_event_received;
1793 window.expose_event_received = false;
1794 let window = window.window.clone();
1795 drop(state);
1796 window.refresh(RequestFrameOptions {
1797 require_presentation: expose_event_received,
1798 });
1799 }
1800 xcb_connection
1801 };
1802 client.process_x11_events(&xcb_connection).log_err();
1803
1804 // Take into account that some frames have been skipped
1805 let now = Instant::now();
1806 while instant < now {
1807 instant += refresh_rate;
1808 }
1809 calloop::timer::TimeoutAction::ToInstant(instant)
1810 }
1811 })
1812 .expect("Failed to initialize window refresh timer")
1813 }
1814
1815 fn get_cursor_icon(&mut self, style: CursorStyle) -> Option<xproto::Cursor> {
1816 if let Some(cursor) = self.cursor_cache.get(&style) {
1817 return *cursor;
1818 }
1819
1820 let mut result;
1821 match style {
1822 CursorStyle::None => match create_invisible_cursor(&self.xcb_connection) {
1823 Ok(loaded_cursor) => result = Ok(loaded_cursor),
1824 Err(err) => result = Err(err.context("X11: error while creating invisible cursor")),
1825 },
1826 _ => 'outer: {
1827 let mut errors = String::new();
1828 let cursor_icon_names = style.to_icon_names();
1829 for cursor_icon_name in cursor_icon_names {
1830 match self
1831 .cursor_handle
1832 .load_cursor(&self.xcb_connection, cursor_icon_name)
1833 {
1834 Ok(loaded_cursor) => {
1835 if loaded_cursor != x11rb::NONE {
1836 result = Ok(loaded_cursor);
1837 break 'outer;
1838 }
1839 }
1840 Err(err) => {
1841 errors.push_str(&err.to_string());
1842 errors.push('\n');
1843 }
1844 }
1845 }
1846 if errors.is_empty() {
1847 result = Err(anyhow!(
1848 "errors while loading cursor icons {:?}:\n{}",
1849 cursor_icon_names,
1850 errors
1851 ));
1852 } else {
1853 result = Err(anyhow!("did not find cursor icons {:?}", cursor_icon_names));
1854 }
1855 }
1856 };
1857
1858 let cursor = match result {
1859 Ok(cursor) => Some(cursor),
1860 Err(err) => {
1861 match self
1862 .cursor_handle
1863 .load_cursor(&self.xcb_connection, DEFAULT_CURSOR_ICON_NAME)
1864 {
1865 Ok(default) => {
1866 log_cursor_icon_warning(err.context(format!(
1867 "X11: error loading cursor icon, falling back on default icon '{}'",
1868 DEFAULT_CURSOR_ICON_NAME
1869 )));
1870 Some(default)
1871 }
1872 Err(default_err) => {
1873 log_cursor_icon_warning(err.context(default_err).context(format!(
1874 "X11: error loading default cursor fallback '{}'",
1875 DEFAULT_CURSOR_ICON_NAME
1876 )));
1877 None
1878 }
1879 }
1880 }
1881 };
1882
1883 self.cursor_cache.insert(style, cursor);
1884 cursor
1885 }
1886}
1887
1888// Adapted from:
1889// https://docs.rs/winit/0.29.11/src/winit/platform_impl/linux/x11/monitor.rs.html#103-111
1890pub fn mode_refresh_rate(mode: &randr::ModeInfo) -> Duration {
1891 if mode.dot_clock == 0 || mode.htotal == 0 || mode.vtotal == 0 {
1892 return Duration::from_millis(16);
1893 }
1894
1895 let millihertz = mode.dot_clock as u64 * 1_000 / (mode.htotal as u64 * mode.vtotal as u64);
1896 let micros = 1_000_000_000 / millihertz;
1897 log::info!("Refreshing every {}ms", micros / 1_000);
1898 Duration::from_micros(micros)
1899}
1900
1901fn fp3232_to_f32(value: xinput::Fp3232) -> f32 {
1902 value.integral as f32 + value.frac as f32 / u32::MAX as f32
1903}
1904
1905fn check_compositor_present(xcb_connection: &XCBConnection, root: u32) -> bool {
1906 // Method 1: Check for _NET_WM_CM_S{root}
1907 let atom_name = format!("_NET_WM_CM_S{}", root);
1908 let atom1 = get_reply(
1909 || format!("Failed to intern {atom_name}"),
1910 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1911 );
1912 let method1 = match atom1.log_with_level(Level::Debug) {
1913 Some(reply) if reply.atom != x11rb::NONE => {
1914 let atom = reply.atom;
1915 get_reply(
1916 || format!("Failed to get {atom_name} owner"),
1917 xcb_connection.get_selection_owner(atom),
1918 )
1919 .map(|reply| reply.owner != 0)
1920 .log_with_level(Level::Debug)
1921 .unwrap_or(false)
1922 }
1923 _ => false,
1924 };
1925
1926 // Method 2: Check for _NET_WM_CM_OWNER
1927 let atom_name = "_NET_WM_CM_OWNER";
1928 let atom2 = get_reply(
1929 || format!("Failed to intern {atom_name}"),
1930 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1931 );
1932 let method2 = match atom2.log_with_level(Level::Debug) {
1933 Some(reply) if reply.atom != x11rb::NONE => {
1934 let atom = reply.atom;
1935 get_reply(
1936 || format!("Failed to get {atom_name}"),
1937 xcb_connection.get_property(false, root, atom, xproto::AtomEnum::WINDOW, 0, 1),
1938 )
1939 .map(|reply| reply.value_len > 0)
1940 .unwrap_or(false)
1941 }
1942 _ => return false,
1943 };
1944
1945 // Method 3: Check for _NET_SUPPORTING_WM_CHECK
1946 let atom_name = "_NET_SUPPORTING_WM_CHECK";
1947 let atom3 = get_reply(
1948 || format!("Failed to intern {atom_name}"),
1949 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1950 );
1951 let method3 = match atom3.log_with_level(Level::Debug) {
1952 Some(reply) if reply.atom != x11rb::NONE => {
1953 let atom = reply.atom;
1954 get_reply(
1955 || format!("Failed to get {atom_name}"),
1956 xcb_connection.get_property(false, root, atom, xproto::AtomEnum::WINDOW, 0, 1),
1957 )
1958 .map(|reply| reply.value_len > 0)
1959 .unwrap_or(false)
1960 }
1961 _ => return false,
1962 };
1963
1964 log::debug!(
1965 "Compositor detection: _NET_WM_CM_S?={}, _NET_WM_CM_OWNER={}, _NET_SUPPORTING_WM_CHECK={}",
1966 method1,
1967 method2,
1968 method3
1969 );
1970
1971 method1 || method2 || method3
1972}
1973
1974fn check_gtk_frame_extents_supported(
1975 xcb_connection: &XCBConnection,
1976 atoms: &XcbAtoms,
1977 root: xproto::Window,
1978) -> bool {
1979 let Some(supported_atoms) = get_reply(
1980 || "Failed to get _NET_SUPPORTED",
1981 xcb_connection.get_property(
1982 false,
1983 root,
1984 atoms._NET_SUPPORTED,
1985 xproto::AtomEnum::ATOM,
1986 0,
1987 1024,
1988 ),
1989 )
1990 .log_with_level(Level::Debug) else {
1991 return false;
1992 };
1993
1994 let supported_atom_ids: Vec<u32> = supported_atoms
1995 .value
1996 .chunks_exact(4)
1997 .filter_map(|chunk| chunk.try_into().ok().map(u32::from_ne_bytes))
1998 .collect();
1999
2000 supported_atom_ids.contains(&atoms._GTK_FRAME_EXTENTS)
2001}
2002
2003fn xdnd_is_atom_supported(atom: u32, atoms: &XcbAtoms) -> bool {
2004 return atom == atoms.TEXT
2005 || atom == atoms.STRING
2006 || atom == atoms.UTF8_STRING
2007 || atom == atoms.TEXT_PLAIN
2008 || atom == atoms.TEXT_PLAIN_UTF8
2009 || atom == atoms.TextUriList;
2010}
2011
2012fn xdnd_get_supported_atom(
2013 xcb_connection: &XCBConnection,
2014 supported_atoms: &XcbAtoms,
2015 target: xproto::Window,
2016) -> u32 {
2017 if let Some(reply) = get_reply(
2018 || "Failed to get XDnD supported atoms",
2019 xcb_connection.get_property(
2020 false,
2021 target,
2022 supported_atoms.XdndTypeList,
2023 AtomEnum::ANY,
2024 0,
2025 1024,
2026 ),
2027 )
2028 .log_with_level(Level::Warn)
2029 {
2030 if let Some(atoms) = reply.value32() {
2031 for atom in atoms {
2032 if xdnd_is_atom_supported(atom, &supported_atoms) {
2033 return atom;
2034 }
2035 }
2036 }
2037 }
2038 return 0;
2039}
2040
2041fn xdnd_send_finished(
2042 xcb_connection: &XCBConnection,
2043 atoms: &XcbAtoms,
2044 source: xproto::Window,
2045 target: xproto::Window,
2046) {
2047 let message = ClientMessageEvent {
2048 format: 32,
2049 window: target,
2050 type_: atoms.XdndFinished,
2051 data: ClientMessageData::from([source, 1, atoms.XdndActionCopy, 0, 0]),
2052 sequence: 0,
2053 response_type: xproto::CLIENT_MESSAGE_EVENT,
2054 };
2055 check_reply(
2056 || "Failed to send XDnD finished event",
2057 xcb_connection.send_event(false, target, EventMask::default(), message),
2058 )
2059 .log_err();
2060 xcb_connection.flush().log_err();
2061}
2062
2063fn xdnd_send_status(
2064 xcb_connection: &XCBConnection,
2065 atoms: &XcbAtoms,
2066 source: xproto::Window,
2067 target: xproto::Window,
2068 action: u32,
2069) {
2070 let message = ClientMessageEvent {
2071 format: 32,
2072 window: target,
2073 type_: atoms.XdndStatus,
2074 data: ClientMessageData::from([source, 1, 0, 0, action]),
2075 sequence: 0,
2076 response_type: xproto::CLIENT_MESSAGE_EVENT,
2077 };
2078 check_reply(
2079 || "Failed to send XDnD status event",
2080 xcb_connection.send_event(false, target, EventMask::default(), message),
2081 )
2082 .log_err();
2083 xcb_connection.flush().log_err();
2084}
2085
2086/// Recomputes `pointer_device_states` by querying all pointer devices.
2087/// When a device is present in `scroll_values_to_preserve`, its value for `ScrollAxisState.scroll_value` is used.
2088fn current_pointer_device_states(
2089 xcb_connection: &XCBConnection,
2090 scroll_values_to_preserve: &BTreeMap<xinput::DeviceId, PointerDeviceState>,
2091) -> Option<BTreeMap<xinput::DeviceId, PointerDeviceState>> {
2092 let devices_query_result = get_reply(
2093 || "Failed to query XInput devices",
2094 xcb_connection.xinput_xi_query_device(XINPUT_ALL_DEVICES),
2095 )
2096 .log_err()?;
2097
2098 let mut pointer_device_states = BTreeMap::new();
2099 pointer_device_states.extend(
2100 devices_query_result
2101 .infos
2102 .iter()
2103 .filter(|info| is_pointer_device(info.type_))
2104 .filter_map(|info| {
2105 let scroll_data = info
2106 .classes
2107 .iter()
2108 .filter_map(|class| class.data.as_scroll())
2109 .map(|class| *class)
2110 .rev()
2111 .collect::<Vec<_>>();
2112 let old_state = scroll_values_to_preserve.get(&info.deviceid);
2113 let old_horizontal = old_state.map(|state| &state.horizontal);
2114 let old_vertical = old_state.map(|state| &state.vertical);
2115 let horizontal = scroll_data
2116 .iter()
2117 .find(|data| data.scroll_type == xinput::ScrollType::HORIZONTAL)
2118 .map(|data| scroll_data_to_axis_state(data, old_horizontal));
2119 let vertical = scroll_data
2120 .iter()
2121 .find(|data| data.scroll_type == xinput::ScrollType::VERTICAL)
2122 .map(|data| scroll_data_to_axis_state(data, old_vertical));
2123 if horizontal.is_none() && vertical.is_none() {
2124 None
2125 } else {
2126 Some((
2127 info.deviceid,
2128 PointerDeviceState {
2129 horizontal: horizontal.unwrap_or_else(Default::default),
2130 vertical: vertical.unwrap_or_else(Default::default),
2131 },
2132 ))
2133 }
2134 }),
2135 );
2136 if pointer_device_states.is_empty() {
2137 log::error!("Found no xinput mouse pointers.");
2138 }
2139 return Some(pointer_device_states);
2140}
2141
2142/// Returns true if the device is a pointer device. Does not include pointer device groups.
2143fn is_pointer_device(type_: xinput::DeviceType) -> bool {
2144 type_ == xinput::DeviceType::SLAVE_POINTER
2145}
2146
2147fn scroll_data_to_axis_state(
2148 data: &xinput::DeviceClassDataScroll,
2149 old_axis_state_with_valid_scroll_value: Option<&ScrollAxisState>,
2150) -> ScrollAxisState {
2151 ScrollAxisState {
2152 valuator_number: Some(data.number),
2153 multiplier: SCROLL_LINES / fp3232_to_f32(data.increment),
2154 scroll_value: old_axis_state_with_valid_scroll_value.and_then(|state| state.scroll_value),
2155 }
2156}
2157
2158fn reset_all_pointer_device_scroll_positions(
2159 pointer_device_states: &mut BTreeMap<xinput::DeviceId, PointerDeviceState>,
2160) {
2161 pointer_device_states
2162 .iter_mut()
2163 .for_each(|(_, device_state)| reset_pointer_device_scroll_positions(device_state));
2164}
2165
2166fn reset_pointer_device_scroll_positions(pointer: &mut PointerDeviceState) {
2167 pointer.horizontal.scroll_value = None;
2168 pointer.vertical.scroll_value = None;
2169}
2170
2171/// Returns the scroll delta for a smooth scrolling motion event, or `None` if no scroll data is present.
2172fn get_scroll_delta_and_update_state(
2173 pointer: &mut PointerDeviceState,
2174 event: &xinput::MotionEvent,
2175) -> Option<Point<f32>> {
2176 let delta_x = get_axis_scroll_delta_and_update_state(event, &mut pointer.horizontal);
2177 let delta_y = get_axis_scroll_delta_and_update_state(event, &mut pointer.vertical);
2178 if delta_x.is_some() || delta_y.is_some() {
2179 Some(Point::new(delta_x.unwrap_or(0.0), delta_y.unwrap_or(0.0)))
2180 } else {
2181 None
2182 }
2183}
2184
2185fn get_axis_scroll_delta_and_update_state(
2186 event: &xinput::MotionEvent,
2187 axis: &mut ScrollAxisState,
2188) -> Option<f32> {
2189 let axis_index = get_valuator_axis_index(&event.valuator_mask, axis.valuator_number?)?;
2190 if let Some(axis_value) = event.axisvalues.get(axis_index) {
2191 let new_scroll = fp3232_to_f32(*axis_value);
2192 let delta_scroll = axis
2193 .scroll_value
2194 .map(|old_scroll| (old_scroll - new_scroll) * axis.multiplier);
2195 axis.scroll_value = Some(new_scroll);
2196 delta_scroll
2197 } else {
2198 log::error!("Encountered invalid XInput valuator_mask, scrolling may not work properly.");
2199 None
2200 }
2201}
2202
2203fn make_scroll_wheel_event(
2204 position: Point<Pixels>,
2205 scroll_delta: Point<f32>,
2206 modifiers: Modifiers,
2207) -> crate::ScrollWheelEvent {
2208 // When shift is held down, vertical scrolling turns into horizontal scrolling.
2209 let delta = if modifiers.shift {
2210 Point {
2211 x: scroll_delta.y,
2212 y: 0.0,
2213 }
2214 } else {
2215 scroll_delta
2216 };
2217 crate::ScrollWheelEvent {
2218 position,
2219 delta: ScrollDelta::Lines(delta),
2220 modifiers,
2221 touch_phase: TouchPhase::default(),
2222 }
2223}
2224
2225fn create_invisible_cursor(
2226 connection: &XCBConnection,
2227) -> anyhow::Result<crate::platform::linux::x11::client::xproto::Cursor> {
2228 let empty_pixmap = connection.generate_id()?;
2229 let root = connection.setup().roots[0].root;
2230 connection.create_pixmap(1, empty_pixmap, root, 1, 1)?;
2231
2232 let cursor = connection.generate_id()?;
2233 connection.create_cursor(cursor, empty_pixmap, empty_pixmap, 0, 0, 0, 0, 0, 0, 0, 0)?;
2234
2235 connection.free_pixmap(empty_pixmap)?;
2236
2237 xcb_flush(connection);
2238 Ok(cursor)
2239}
2240
2241enum DpiMode {
2242 Randr,
2243 Scale(f32),
2244 NotSet,
2245}
2246
2247fn get_scale_factor(
2248 connection: &XCBConnection,
2249 resource_database: &Database,
2250 screen_index: usize,
2251) -> f32 {
2252 let env_dpi = std::env::var(GPUI_X11_SCALE_FACTOR_ENV)
2253 .ok()
2254 .map(|var| {
2255 if var.to_lowercase() == "randr" {
2256 DpiMode::Randr
2257 } else if let Ok(scale) = var.parse::<f32>() {
2258 if valid_scale_factor(scale) {
2259 DpiMode::Scale(scale)
2260 } else {
2261 panic!(
2262 "`{}` must be a positive normal number or `randr`. Got `{}`",
2263 GPUI_X11_SCALE_FACTOR_ENV, var
2264 );
2265 }
2266 } else if var.is_empty() {
2267 DpiMode::NotSet
2268 } else {
2269 panic!(
2270 "`{}` must be a positive number or `randr`. Got `{}`",
2271 GPUI_X11_SCALE_FACTOR_ENV, var
2272 );
2273 }
2274 })
2275 .unwrap_or(DpiMode::NotSet);
2276
2277 match env_dpi {
2278 DpiMode::Scale(scale) => {
2279 log::info!(
2280 "Using scale factor from {}: {}",
2281 GPUI_X11_SCALE_FACTOR_ENV,
2282 scale
2283 );
2284 return scale;
2285 }
2286 DpiMode::Randr => {
2287 if let Some(scale) = get_randr_scale_factor(connection, screen_index) {
2288 log::info!(
2289 "Using RandR scale factor from {}=randr: {}",
2290 GPUI_X11_SCALE_FACTOR_ENV,
2291 scale
2292 );
2293 return scale;
2294 }
2295 log::warn!("Failed to calculate RandR scale factor, falling back to default");
2296 return 1.0;
2297 }
2298 DpiMode::NotSet => {}
2299 }
2300
2301 // TODO: Use scale factor from XSettings here
2302
2303 if let Some(dpi) = resource_database
2304 .get_value::<f32>("Xft.dpi", "Xft.dpi")
2305 .ok()
2306 .flatten()
2307 {
2308 let scale = dpi / 96.0; // base dpi
2309 log::info!("Using scale factor from Xft.dpi: {}", scale);
2310 return scale;
2311 }
2312
2313 if let Some(scale) = get_randr_scale_factor(connection, screen_index) {
2314 log::info!("Using RandR scale factor: {}", scale);
2315 return scale;
2316 }
2317
2318 log::info!("Using default scale factor: 1.0");
2319 1.0
2320}
2321
2322fn get_randr_scale_factor(connection: &XCBConnection, screen_index: usize) -> Option<f32> {
2323 let root = connection.setup().roots.get(screen_index)?.root;
2324
2325 let version_cookie = connection.randr_query_version(1, 6).ok()?;
2326 let version_reply = version_cookie.reply().ok()?;
2327 if version_reply.major_version < 1
2328 || (version_reply.major_version == 1 && version_reply.minor_version < 5)
2329 {
2330 return legacy_get_randr_scale_factor(connection, root); // for randr <1.5
2331 }
2332
2333 let monitors_cookie = connection.randr_get_monitors(root, true).ok()?; // true for active only
2334 let monitors_reply = monitors_cookie.reply().ok()?;
2335
2336 let mut fallback_scale: Option<f32> = None;
2337 for monitor in monitors_reply.monitors {
2338 if monitor.width_in_millimeters == 0 || monitor.height_in_millimeters == 0 {
2339 continue;
2340 }
2341 let scale_factor = get_dpi_factor(
2342 (monitor.width as u32, monitor.height as u32),
2343 (
2344 monitor.width_in_millimeters as u64,
2345 monitor.height_in_millimeters as u64,
2346 ),
2347 );
2348 if monitor.primary {
2349 return Some(scale_factor);
2350 } else if fallback_scale.is_none() {
2351 fallback_scale = Some(scale_factor);
2352 }
2353 }
2354
2355 fallback_scale
2356}
2357
2358fn legacy_get_randr_scale_factor(connection: &XCBConnection, root: u32) -> Option<f32> {
2359 let primary_cookie = connection.randr_get_output_primary(root).ok()?;
2360 let primary_reply = primary_cookie.reply().ok()?;
2361 let primary_output = primary_reply.output;
2362
2363 let primary_output_cookie = connection
2364 .randr_get_output_info(primary_output, x11rb::CURRENT_TIME)
2365 .ok()?;
2366 let primary_output_info = primary_output_cookie.reply().ok()?;
2367
2368 // try primary
2369 if primary_output_info.connection == randr::Connection::CONNECTED
2370 && primary_output_info.mm_width > 0
2371 && primary_output_info.mm_height > 0
2372 && primary_output_info.crtc != 0
2373 {
2374 let crtc_cookie = connection
2375 .randr_get_crtc_info(primary_output_info.crtc, x11rb::CURRENT_TIME)
2376 .ok()?;
2377 let crtc_info = crtc_cookie.reply().ok()?;
2378
2379 if crtc_info.width > 0 && crtc_info.height > 0 {
2380 let scale_factor = get_dpi_factor(
2381 (crtc_info.width as u32, crtc_info.height as u32),
2382 (
2383 primary_output_info.mm_width as u64,
2384 primary_output_info.mm_height as u64,
2385 ),
2386 );
2387 return Some(scale_factor);
2388 }
2389 }
2390
2391 // fallback: full scan
2392 let resources_cookie = connection.randr_get_screen_resources_current(root).ok()?;
2393 let screen_resources = resources_cookie.reply().ok()?;
2394
2395 let mut crtc_cookies = Vec::with_capacity(screen_resources.crtcs.len());
2396 for &crtc in &screen_resources.crtcs {
2397 if let Ok(cookie) = connection.randr_get_crtc_info(crtc, x11rb::CURRENT_TIME) {
2398 crtc_cookies.push((crtc, cookie));
2399 }
2400 }
2401
2402 let mut crtc_infos: HashMap<randr::Crtc, randr::GetCrtcInfoReply> = HashMap::default();
2403 let mut valid_outputs: HashSet<randr::Output> = HashSet::new();
2404 for (crtc, cookie) in crtc_cookies {
2405 if let Ok(reply) = cookie.reply() {
2406 if reply.width > 0 && reply.height > 0 && !reply.outputs.is_empty() {
2407 crtc_infos.insert(crtc, reply.clone());
2408 valid_outputs.extend(&reply.outputs);
2409 }
2410 }
2411 }
2412
2413 if valid_outputs.is_empty() {
2414 return None;
2415 }
2416
2417 let mut output_cookies = Vec::with_capacity(valid_outputs.len());
2418 for &output in &valid_outputs {
2419 if let Ok(cookie) = connection.randr_get_output_info(output, x11rb::CURRENT_TIME) {
2420 output_cookies.push((output, cookie));
2421 }
2422 }
2423 let mut output_infos: HashMap<randr::Output, randr::GetOutputInfoReply> = HashMap::default();
2424 for (output, cookie) in output_cookies {
2425 if let Ok(reply) = cookie.reply() {
2426 output_infos.insert(output, reply);
2427 }
2428 }
2429
2430 let mut fallback_scale: Option<f32> = None;
2431 for crtc_info in crtc_infos.values() {
2432 for &output in &crtc_info.outputs {
2433 if let Some(output_info) = output_infos.get(&output) {
2434 if output_info.connection != randr::Connection::CONNECTED {
2435 continue;
2436 }
2437
2438 if output_info.mm_width == 0 || output_info.mm_height == 0 {
2439 continue;
2440 }
2441
2442 let scale_factor = get_dpi_factor(
2443 (crtc_info.width as u32, crtc_info.height as u32),
2444 (output_info.mm_width as u64, output_info.mm_height as u64),
2445 );
2446
2447 if output != primary_output && fallback_scale.is_none() {
2448 fallback_scale = Some(scale_factor);
2449 }
2450 }
2451 }
2452 }
2453
2454 fallback_scale
2455}
2456
2457fn get_dpi_factor((width_px, height_px): (u32, u32), (width_mm, height_mm): (u64, u64)) -> f32 {
2458 let ppmm = ((width_px as f64 * height_px as f64) / (width_mm as f64 * height_mm as f64)).sqrt(); // pixels per mm
2459
2460 const MM_PER_INCH: f64 = 25.4;
2461 const BASE_DPI: f64 = 96.0;
2462 const QUANTIZE_STEP: f64 = 12.0; // e.g. 1.25 = 15/12, 1.5 = 18/12, 1.75 = 21/12, 2.0 = 24/12
2463 const MIN_SCALE: f64 = 1.0;
2464 const MAX_SCALE: f64 = 20.0;
2465
2466 let dpi_factor =
2467 ((ppmm * (QUANTIZE_STEP * MM_PER_INCH / BASE_DPI)).round() / QUANTIZE_STEP).max(MIN_SCALE);
2468
2469 let validated_factor = if dpi_factor <= MAX_SCALE {
2470 dpi_factor
2471 } else {
2472 MIN_SCALE
2473 };
2474
2475 if valid_scale_factor(validated_factor as f32) {
2476 validated_factor as f32
2477 } else {
2478 log::warn!(
2479 "Calculated DPI factor {} is invalid, using 1.0",
2480 validated_factor
2481 );
2482 1.0
2483 }
2484}
2485
2486#[inline]
2487fn valid_scale_factor(scale_factor: f32) -> bool {
2488 scale_factor.is_sign_positive() && scale_factor.is_normal()
2489}