1use crate::{Capslock, xcb_flush};
2use core::str;
3use std::{
4 cell::RefCell,
5 collections::{BTreeMap, HashSet},
6 ops::Deref,
7 path::PathBuf,
8 rc::{Rc, Weak},
9 time::{Duration, Instant},
10};
11
12use anyhow::{Context as _, anyhow};
13use calloop::{
14 EventLoop, LoopHandle, RegistrationToken,
15 generic::{FdWrapper, Generic},
16};
17use collections::HashMap;
18use http_client::Url;
19use log::Level;
20use smallvec::SmallVec;
21use util::ResultExt;
22
23use x11rb::{
24 connection::{Connection, RequestConnection},
25 cursor,
26 errors::ConnectionError,
27 protocol::randr::ConnectionExt as _,
28 protocol::xinput::ConnectionExt,
29 protocol::xkb::ConnectionExt as _,
30 protocol::xproto::{
31 AtomEnum, ChangeWindowAttributesAux, ClientMessageData, ClientMessageEvent,
32 ConnectionExt as _, EventMask, KeyPressEvent, Visibility,
33 },
34 protocol::{Event, randr, render, xinput, xkb, xproto},
35 resource_manager::Database,
36 wrapper::ConnectionExt as _,
37 xcb_ffi::XCBConnection,
38};
39use xim::{AttributeName, Client, InputStyle, x11rb::X11rbClient};
40use xkbc::x11::ffi::{XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION};
41use xkbcommon::xkb::{self as xkbc, LayoutIndex, ModMask, STATE_LAYOUT_EFFECTIVE};
42
43use super::{
44 ButtonOrScroll, ScrollDirection, X11Display, X11WindowStatePtr, XcbAtoms, XimCallbackEvent,
45 XimHandler, button_or_scroll_from_event_detail, check_reply,
46 clipboard::{self, Clipboard},
47 get_reply, get_valuator_axis_index, handle_connection_error, modifiers_from_state,
48 pressed_button_from_mask,
49};
50
51use crate::platform::{
52 LinuxCommon, PlatformWindow,
53 blade::BladeContext,
54 linux::{
55 DEFAULT_CURSOR_ICON_NAME, LinuxClient, get_xkb_compose_state, is_within_click_distance,
56 log_cursor_icon_warning, open_uri_internal,
57 platform::{DOUBLE_CLICK_INTERVAL, SCROLL_LINES},
58 reveal_path_internal,
59 xdg_desktop_portal::{Event as XDPEvent, XDPEventSource},
60 },
61};
62use crate::{
63 AnyWindowHandle, Bounds, ClipboardItem, CursorStyle, DisplayId, FileDropEvent, Keystroke,
64 LinuxKeyboardLayout, Modifiers, ModifiersChangedEvent, MouseButton, Pixels, Platform,
65 PlatformDisplay, PlatformInput, PlatformKeyboardLayout, Point, RequestFrameOptions,
66 ScaledPixels, ScrollDelta, Size, TouchPhase, WindowParams, X11Window,
67 modifiers_from_xinput_info, point, px,
68};
69
70/// Value for DeviceId parameters which selects all devices.
71pub(crate) const XINPUT_ALL_DEVICES: xinput::DeviceId = 0;
72
73/// Value for DeviceId parameters which selects all device groups. Events that
74/// occur within the group are emitted by the group itself.
75///
76/// In XInput 2's interface, these are referred to as "master devices", but that
77/// terminology is both archaic and unclear.
78pub(crate) const XINPUT_ALL_DEVICE_GROUPS: xinput::DeviceId = 1;
79
80const GPUI_X11_SCALE_FACTOR_ENV: &str = "GPUI_X11_SCALE_FACTOR";
81
82pub(crate) struct WindowRef {
83 window: X11WindowStatePtr,
84 refresh_state: Option<RefreshState>,
85 expose_event_received: bool,
86 last_visibility: Visibility,
87 is_mapped: bool,
88}
89
90impl WindowRef {
91 pub fn handle(&self) -> AnyWindowHandle {
92 self.window.state.borrow().handle
93 }
94}
95
96impl Deref for WindowRef {
97 type Target = X11WindowStatePtr;
98
99 fn deref(&self) -> &Self::Target {
100 &self.window
101 }
102}
103
104enum RefreshState {
105 Hidden {
106 refresh_rate: Duration,
107 },
108 PeriodicRefresh {
109 refresh_rate: Duration,
110 event_loop_token: RegistrationToken,
111 },
112}
113
114#[derive(Debug)]
115#[non_exhaustive]
116pub enum EventHandlerError {
117 XCBConnectionError(ConnectionError),
118 XIMClientError(xim::ClientError),
119}
120
121impl std::error::Error for EventHandlerError {}
122
123impl std::fmt::Display for EventHandlerError {
124 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
125 match self {
126 EventHandlerError::XCBConnectionError(err) => err.fmt(f),
127 EventHandlerError::XIMClientError(err) => err.fmt(f),
128 }
129 }
130}
131
132impl From<ConnectionError> for EventHandlerError {
133 fn from(err: ConnectionError) -> Self {
134 EventHandlerError::XCBConnectionError(err)
135 }
136}
137
138impl From<xim::ClientError> for EventHandlerError {
139 fn from(err: xim::ClientError) -> Self {
140 EventHandlerError::XIMClientError(err)
141 }
142}
143
144#[derive(Debug, Default, Clone)]
145struct XKBStateNotiy {
146 depressed_layout: LayoutIndex,
147 latched_layout: LayoutIndex,
148 locked_layout: LayoutIndex,
149}
150
151#[derive(Debug, Default)]
152pub struct Xdnd {
153 other_window: xproto::Window,
154 drag_type: u32,
155 retrieved: bool,
156 position: Point<Pixels>,
157}
158
159#[derive(Debug)]
160struct PointerDeviceState {
161 horizontal: ScrollAxisState,
162 vertical: ScrollAxisState,
163}
164
165#[derive(Debug, Default)]
166struct ScrollAxisState {
167 /// Valuator number for looking up this axis's scroll value.
168 valuator_number: Option<u16>,
169 /// Conversion factor from scroll units to lines.
170 multiplier: f32,
171 /// Last scroll value for calculating scroll delta.
172 ///
173 /// This gets set to `None` whenever it might be invalid - when devices change or when window focus changes.
174 /// The logic errs on the side of invalidating this, since the consequence is just skipping the delta of one scroll event.
175 /// The consequence of not invalidating it can be large invalid deltas, which are much more user visible.
176 scroll_value: Option<f32>,
177}
178
179pub struct X11ClientState {
180 pub(crate) loop_handle: LoopHandle<'static, X11Client>,
181 pub(crate) event_loop: Option<calloop::EventLoop<'static, X11Client>>,
182
183 pub(crate) last_click: Instant,
184 pub(crate) last_mouse_button: Option<MouseButton>,
185 pub(crate) last_location: Point<Pixels>,
186 pub(crate) current_count: usize,
187
188 gpu_context: BladeContext,
189
190 pub(crate) scale_factor: f32,
191
192 xkb_context: xkbc::Context,
193 pub(crate) xcb_connection: Rc<XCBConnection>,
194 xkb_device_id: i32,
195 client_side_decorations_supported: bool,
196 pub(crate) x_root_index: usize,
197 pub(crate) _resource_database: Database,
198 pub(crate) atoms: XcbAtoms,
199 pub(crate) windows: HashMap<xproto::Window, WindowRef>,
200 pub(crate) mouse_focused_window: Option<xproto::Window>,
201 pub(crate) keyboard_focused_window: Option<xproto::Window>,
202 pub(crate) xkb: xkbc::State,
203 previous_xkb_state: XKBStateNotiy,
204 keyboard_layout: LinuxKeyboardLayout,
205 pub(crate) ximc: Option<X11rbClient<Rc<XCBConnection>>>,
206 pub(crate) xim_handler: Option<XimHandler>,
207 pub modifiers: Modifiers,
208 pub capslock: Capslock,
209 // TODO: Can the other updates to `modifiers` be removed so that this is unnecessary?
210 // capslock logic was done analog to modifiers
211 pub last_modifiers_changed_event: Modifiers,
212 pub last_capslock_changed_event: Capslock,
213
214 pub(crate) compose_state: Option<xkbc::compose::State>,
215 pub(crate) pre_edit_text: Option<String>,
216 pub(crate) composing: bool,
217 pub(crate) pre_key_char_down: Option<Keystroke>,
218 pub(crate) cursor_handle: cursor::Handle,
219 pub(crate) cursor_styles: HashMap<xproto::Window, CursorStyle>,
220 pub(crate) cursor_cache: HashMap<CursorStyle, Option<xproto::Cursor>>,
221
222 pointer_device_states: BTreeMap<xinput::DeviceId, PointerDeviceState>,
223
224 pub(crate) common: LinuxCommon,
225 pub(crate) clipboard: Clipboard,
226 pub(crate) clipboard_item: Option<ClipboardItem>,
227 pub(crate) xdnd_state: Xdnd,
228}
229
230#[derive(Clone)]
231pub struct X11ClientStatePtr(pub Weak<RefCell<X11ClientState>>);
232
233impl X11ClientStatePtr {
234 fn get_client(&self) -> Option<X11Client> {
235 self.0.upgrade().map(X11Client)
236 }
237
238 pub fn drop_window(&self, x_window: u32) {
239 let Some(client) = self.get_client() else {
240 return;
241 };
242 let mut state = client.0.borrow_mut();
243
244 if let Some(window_ref) = state.windows.remove(&x_window) {
245 match window_ref.refresh_state {
246 Some(RefreshState::PeriodicRefresh {
247 event_loop_token, ..
248 }) => {
249 state.loop_handle.remove(event_loop_token);
250 }
251 _ => {}
252 }
253 }
254 if state.mouse_focused_window == Some(x_window) {
255 state.mouse_focused_window = None;
256 }
257 if state.keyboard_focused_window == Some(x_window) {
258 state.keyboard_focused_window = None;
259 }
260 state.cursor_styles.remove(&x_window);
261
262 if state.windows.is_empty() {
263 state.common.signal.stop();
264 }
265 }
266
267 pub fn update_ime_position(&self, bounds: Bounds<ScaledPixels>) {
268 let Some(client) = self.get_client() else {
269 return;
270 };
271 let mut state = client.0.borrow_mut();
272 if state.composing || state.ximc.is_none() {
273 return;
274 }
275
276 let Some(mut ximc) = state.ximc.take() else {
277 log::error!("bug: xim connection not set");
278 return;
279 };
280 let Some(xim_handler) = state.xim_handler.take() else {
281 log::error!("bug: xim handler not set");
282 state.ximc = Some(ximc);
283 return;
284 };
285 let ic_attributes = ximc
286 .build_ic_attributes()
287 .push(
288 xim::AttributeName::InputStyle,
289 xim::InputStyle::PREEDIT_CALLBACKS,
290 )
291 .push(xim::AttributeName::ClientWindow, xim_handler.window)
292 .push(xim::AttributeName::FocusWindow, xim_handler.window)
293 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
294 b.push(
295 xim::AttributeName::SpotLocation,
296 xim::Point {
297 x: u32::from(bounds.origin.x + bounds.size.width) as i16,
298 y: u32::from(bounds.origin.y + bounds.size.height) as i16,
299 },
300 );
301 })
302 .build();
303 let _ = ximc
304 .set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
305 .log_err();
306 state.ximc = Some(ximc);
307 state.xim_handler = Some(xim_handler);
308 }
309}
310
311#[derive(Clone)]
312pub(crate) struct X11Client(Rc<RefCell<X11ClientState>>);
313
314impl X11Client {
315 pub(crate) fn new() -> anyhow::Result<Self> {
316 let event_loop = EventLoop::try_new()?;
317
318 let (common, main_receiver) = LinuxCommon::new(event_loop.get_signal());
319
320 let handle = event_loop.handle();
321
322 handle
323 .insert_source(main_receiver, {
324 let handle = handle.clone();
325 move |event, _, _: &mut X11Client| {
326 if let calloop::channel::Event::Msg(runnable) = event {
327 // Insert the runnables as idle callbacks, so we make sure that user-input and X11
328 // events have higher priority and runnables are only worked off after the event
329 // callbacks.
330 handle.insert_idle(|_| {
331 runnable.run();
332 });
333 }
334 }
335 })
336 .map_err(|err| {
337 anyhow!("Failed to initialize event loop handling of foreground tasks: {err:?}")
338 })?;
339
340 let (xcb_connection, x_root_index) = XCBConnection::connect(None)?;
341 xcb_connection.prefetch_extension_information(xkb::X11_EXTENSION_NAME)?;
342 xcb_connection.prefetch_extension_information(randr::X11_EXTENSION_NAME)?;
343 xcb_connection.prefetch_extension_information(render::X11_EXTENSION_NAME)?;
344 xcb_connection.prefetch_extension_information(xinput::X11_EXTENSION_NAME)?;
345
346 // Announce to X server that XInput up to 2.1 is supported. To increase this to 2.2 and
347 // beyond, support for touch events would need to be added.
348 let xinput_version = get_reply(
349 || "XInput XiQueryVersion failed",
350 xcb_connection.xinput_xi_query_version(2, 1),
351 )?;
352 assert!(
353 xinput_version.major_version >= 2,
354 "XInput version >= 2 required."
355 );
356
357 let pointer_device_states =
358 current_pointer_device_states(&xcb_connection, &BTreeMap::new()).unwrap_or_default();
359
360 let atoms = XcbAtoms::new(&xcb_connection)
361 .context("Failed to get XCB atoms")?
362 .reply()
363 .context("Failed to get XCB atoms")?;
364
365 let root = xcb_connection.setup().roots[0].root;
366 let compositor_present = check_compositor_present(&xcb_connection, root);
367 let gtk_frame_extents_supported =
368 check_gtk_frame_extents_supported(&xcb_connection, &atoms, root);
369 let client_side_decorations_supported = compositor_present && gtk_frame_extents_supported;
370 log::info!(
371 "x11: compositor present: {}, gtk_frame_extents_supported: {}",
372 compositor_present,
373 gtk_frame_extents_supported
374 );
375
376 let xkb = get_reply(
377 || "Failed to initialize XKB extension",
378 xcb_connection
379 .xkb_use_extension(XKB_X11_MIN_MAJOR_XKB_VERSION, XKB_X11_MIN_MINOR_XKB_VERSION),
380 )?;
381 assert!(xkb.supported);
382
383 let events = xkb::EventType::STATE_NOTIFY
384 | xkb::EventType::MAP_NOTIFY
385 | xkb::EventType::NEW_KEYBOARD_NOTIFY;
386 let map_notify_parts = xkb::MapPart::KEY_TYPES
387 | xkb::MapPart::KEY_SYMS
388 | xkb::MapPart::MODIFIER_MAP
389 | xkb::MapPart::EXPLICIT_COMPONENTS
390 | xkb::MapPart::KEY_ACTIONS
391 | xkb::MapPart::KEY_BEHAVIORS
392 | xkb::MapPart::VIRTUAL_MODS
393 | xkb::MapPart::VIRTUAL_MOD_MAP;
394 check_reply(
395 || "Failed to select XKB events",
396 xcb_connection.xkb_select_events(
397 xkb::ID::USE_CORE_KBD.into(),
398 0u8.into(),
399 events,
400 map_notify_parts,
401 map_notify_parts,
402 &xkb::SelectEventsAux::new(),
403 ),
404 )?;
405
406 let xkb_context = xkbc::Context::new(xkbc::CONTEXT_NO_FLAGS);
407 let xkb_device_id = xkbc::x11::get_core_keyboard_device_id(&xcb_connection);
408 let xkb_state = {
409 let xkb_keymap = xkbc::x11::keymap_new_from_device(
410 &xkb_context,
411 &xcb_connection,
412 xkb_device_id,
413 xkbc::KEYMAP_COMPILE_NO_FLAGS,
414 );
415 xkbc::x11::state_new_from_device(&xkb_keymap, &xcb_connection, xkb_device_id)
416 };
417 let compose_state = get_xkb_compose_state(&xkb_context);
418 let layout_idx = xkb_state.serialize_layout(STATE_LAYOUT_EFFECTIVE);
419 let layout_name = xkb_state
420 .get_keymap()
421 .layout_get_name(layout_idx)
422 .to_string();
423 let keyboard_layout = LinuxKeyboardLayout::new(layout_name.into());
424
425 let gpu_context = BladeContext::new().context("Unable to init GPU context")?;
426
427 let resource_database = x11rb::resource_manager::new_from_default(&xcb_connection)
428 .context("Failed to create resource database")?;
429 let scale_factor = get_scale_factor(&xcb_connection, &resource_database, x_root_index);
430 let cursor_handle = cursor::Handle::new(&xcb_connection, x_root_index, &resource_database)
431 .context("Failed to initialize cursor theme handler")?
432 .reply()
433 .context("Failed to initialize cursor theme handler")?;
434
435 let clipboard = Clipboard::new().context("Failed to initialize clipboard")?;
436
437 let xcb_connection = Rc::new(xcb_connection);
438
439 let ximc = X11rbClient::init(Rc::clone(&xcb_connection), x_root_index, None).ok();
440 let xim_handler = if ximc.is_some() {
441 Some(XimHandler::new())
442 } else {
443 None
444 };
445
446 // Safety: Safe if xcb::Connection always returns a valid fd
447 let fd = unsafe { FdWrapper::new(Rc::clone(&xcb_connection)) };
448
449 handle
450 .insert_source(
451 Generic::new_with_error::<EventHandlerError>(
452 fd,
453 calloop::Interest::READ,
454 calloop::Mode::Level,
455 ),
456 {
457 let xcb_connection = xcb_connection.clone();
458 move |_readiness, _, client| {
459 client.process_x11_events(&xcb_connection)?;
460 Ok(calloop::PostAction::Continue)
461 }
462 },
463 )
464 .map_err(|err| anyhow!("Failed to initialize X11 event source: {err:?}"))?;
465
466 handle
467 .insert_source(XDPEventSource::new(&common.background_executor), {
468 move |event, _, client| match event {
469 XDPEvent::WindowAppearance(appearance) => {
470 client.with_common(|common| common.appearance = appearance);
471 for (_, window) in &mut client.0.borrow_mut().windows {
472 window.window.set_appearance(appearance);
473 }
474 }
475 XDPEvent::CursorTheme(_) | XDPEvent::CursorSize(_) => {
476 // noop, X11 manages this for us.
477 }
478 }
479 })
480 .map_err(|err| anyhow!("Failed to initialize XDP event source: {err:?}"))?;
481
482 xcb_flush(&xcb_connection);
483
484 Ok(X11Client(Rc::new(RefCell::new(X11ClientState {
485 modifiers: Modifiers::default(),
486 capslock: Capslock::default(),
487 last_modifiers_changed_event: Modifiers::default(),
488 last_capslock_changed_event: Capslock::default(),
489 event_loop: Some(event_loop),
490 loop_handle: handle,
491 common,
492 last_click: Instant::now(),
493 last_mouse_button: None,
494 last_location: Point::new(px(0.0), px(0.0)),
495 current_count: 0,
496 gpu_context,
497 scale_factor,
498
499 xkb_context,
500 xcb_connection,
501 xkb_device_id,
502 client_side_decorations_supported,
503 x_root_index,
504 _resource_database: resource_database,
505 atoms,
506 windows: HashMap::default(),
507 mouse_focused_window: None,
508 keyboard_focused_window: None,
509 xkb: xkb_state,
510 previous_xkb_state: XKBStateNotiy::default(),
511 keyboard_layout,
512 ximc,
513 xim_handler,
514
515 compose_state,
516 pre_edit_text: None,
517 pre_key_char_down: None,
518 composing: false,
519
520 cursor_handle,
521 cursor_styles: HashMap::default(),
522 cursor_cache: HashMap::default(),
523
524 pointer_device_states,
525
526 clipboard,
527 clipboard_item: None,
528 xdnd_state: Xdnd::default(),
529 }))))
530 }
531
532 pub fn process_x11_events(
533 &self,
534 xcb_connection: &XCBConnection,
535 ) -> Result<(), EventHandlerError> {
536 loop {
537 let mut events = Vec::new();
538 let mut windows_to_refresh = HashSet::new();
539
540 let mut last_key_release = None;
541 let mut last_key_press: Option<KeyPressEvent> = None;
542
543 // event handlers for new keyboard / remapping refresh the state without using event
544 // details, this deduplicates them.
545 let mut last_keymap_change_event: Option<Event> = None;
546
547 loop {
548 match xcb_connection.poll_for_event() {
549 Ok(Some(event)) => {
550 match event {
551 Event::Expose(expose_event) => {
552 windows_to_refresh.insert(expose_event.window);
553 }
554 Event::KeyRelease(_) => {
555 if let Some(last_keymap_change_event) =
556 last_keymap_change_event.take()
557 {
558 if let Some(last_key_release) = last_key_release.take() {
559 events.push(last_key_release);
560 }
561 last_key_press = None;
562 events.push(last_keymap_change_event);
563 }
564
565 last_key_release = Some(event);
566 }
567 Event::KeyPress(key_press) => {
568 if let Some(last_keymap_change_event) =
569 last_keymap_change_event.take()
570 {
571 if let Some(last_key_release) = last_key_release.take() {
572 events.push(last_key_release);
573 }
574 last_key_press = None;
575 events.push(last_keymap_change_event);
576 }
577
578 if let Some(last_press) = last_key_press.as_ref() {
579 if last_press.detail == key_press.detail {
580 continue;
581 }
582 }
583
584 if let Some(Event::KeyRelease(key_release)) =
585 last_key_release.take()
586 {
587 // We ignore that last KeyRelease if it's too close to this KeyPress,
588 // suggesting that it's auto-generated by X11 as a key-repeat event.
589 if key_release.detail != key_press.detail
590 || key_press.time.saturating_sub(key_release.time) > 20
591 {
592 events.push(Event::KeyRelease(key_release));
593 }
594 }
595 events.push(Event::KeyPress(key_press));
596 last_key_press = Some(key_press);
597 }
598 Event::XkbNewKeyboardNotify(_) | Event::XkbMapNotify(_) => {
599 if let Some(release_event) = last_key_release.take() {
600 events.push(release_event);
601 }
602 last_keymap_change_event = Some(event);
603 }
604 _ => {
605 if let Some(release_event) = last_key_release.take() {
606 events.push(release_event);
607 }
608 events.push(event);
609 }
610 }
611 }
612 Ok(None) => {
613 break;
614 }
615 Err(err) => {
616 let err = handle_connection_error(err);
617 log::warn!("error while polling for X11 events: {err:?}");
618 break;
619 }
620 }
621 }
622
623 if let Some(release_event) = last_key_release.take() {
624 events.push(release_event);
625 }
626 if let Some(keymap_change_event) = last_keymap_change_event.take() {
627 events.push(keymap_change_event);
628 }
629
630 if events.is_empty() && windows_to_refresh.is_empty() {
631 break;
632 }
633
634 for window in windows_to_refresh.into_iter() {
635 let mut state = self.0.borrow_mut();
636 if let Some(window) = state.windows.get_mut(&window) {
637 window.expose_event_received = true;
638 }
639 }
640
641 for event in events.into_iter() {
642 let mut state = self.0.borrow_mut();
643 if !state.has_xim() {
644 drop(state);
645 self.handle_event(event);
646 continue;
647 }
648
649 let Some((mut ximc, mut xim_handler)) = state.take_xim() else {
650 continue;
651 };
652 let xim_connected = xim_handler.connected;
653 drop(state);
654
655 let xim_filtered = match ximc.filter_event(&event, &mut xim_handler) {
656 Ok(handled) => handled,
657 Err(err) => {
658 log::error!("XIMClientError: {}", err);
659 false
660 }
661 };
662 let xim_callback_event = xim_handler.last_callback_event.take();
663
664 let mut state = self.0.borrow_mut();
665 state.restore_xim(ximc, xim_handler);
666 drop(state);
667
668 if let Some(event) = xim_callback_event {
669 self.handle_xim_callback_event(event);
670 }
671
672 if xim_filtered {
673 continue;
674 }
675
676 if xim_connected {
677 self.xim_handle_event(event);
678 } else {
679 self.handle_event(event);
680 }
681 }
682 }
683 Ok(())
684 }
685
686 pub fn enable_ime(&self) {
687 let mut state = self.0.borrow_mut();
688 if !state.has_xim() {
689 return;
690 }
691
692 let Some((mut ximc, mut xim_handler)) = state.take_xim() else {
693 return;
694 };
695 let mut ic_attributes = ximc
696 .build_ic_attributes()
697 .push(AttributeName::InputStyle, InputStyle::PREEDIT_CALLBACKS)
698 .push(AttributeName::ClientWindow, xim_handler.window)
699 .push(AttributeName::FocusWindow, xim_handler.window);
700
701 let window_id = state.keyboard_focused_window;
702 drop(state);
703 if let Some(window_id) = window_id {
704 let Some(window) = self.get_window(window_id) else {
705 log::error!("Failed to get window for IME positioning");
706 let mut state = self.0.borrow_mut();
707 state.ximc = Some(ximc);
708 state.xim_handler = Some(xim_handler);
709 return;
710 };
711 if let Some(area) = window.get_ime_area() {
712 ic_attributes =
713 ic_attributes.nested_list(xim::AttributeName::PreeditAttributes, |b| {
714 b.push(
715 xim::AttributeName::SpotLocation,
716 xim::Point {
717 x: u32::from(area.origin.x + area.size.width) as i16,
718 y: u32::from(area.origin.y + area.size.height) as i16,
719 },
720 );
721 });
722 }
723 }
724 ximc.create_ic(xim_handler.im_id, ic_attributes.build())
725 .ok();
726 let mut state = self.0.borrow_mut();
727 state.restore_xim(ximc, xim_handler);
728 }
729
730 pub fn reset_ime(&self) {
731 let mut state = self.0.borrow_mut();
732 state.composing = false;
733 if let Some(mut ximc) = state.ximc.take() {
734 if let Some(xim_handler) = state.xim_handler.as_ref() {
735 ximc.reset_ic(xim_handler.im_id, xim_handler.ic_id).ok();
736 } else {
737 log::error!("bug: xim handler not set in reset_ime");
738 }
739 state.ximc = Some(ximc);
740 }
741 }
742
743 fn get_window(&self, win: xproto::Window) -> Option<X11WindowStatePtr> {
744 let state = self.0.borrow();
745 state
746 .windows
747 .get(&win)
748 .filter(|window_reference| !window_reference.window.state.borrow().destroyed)
749 .map(|window_reference| window_reference.window.clone())
750 }
751
752 fn handle_event(&self, event: Event) -> Option<()> {
753 match event {
754 Event::UnmapNotify(event) => {
755 let mut state = self.0.borrow_mut();
756 if let Some(window_ref) = state.windows.get_mut(&event.window) {
757 window_ref.is_mapped = false;
758 }
759 state.update_refresh_loop(event.window);
760 }
761 Event::MapNotify(event) => {
762 let mut state = self.0.borrow_mut();
763 if let Some(window_ref) = state.windows.get_mut(&event.window) {
764 window_ref.is_mapped = true;
765 }
766 state.update_refresh_loop(event.window);
767 }
768 Event::VisibilityNotify(event) => {
769 let mut state = self.0.borrow_mut();
770 if let Some(window_ref) = state.windows.get_mut(&event.window) {
771 window_ref.last_visibility = event.state;
772 }
773 state.update_refresh_loop(event.window);
774 }
775 Event::ClientMessage(event) => {
776 let window = self.get_window(event.window)?;
777 let [atom, arg1, arg2, arg3, arg4] = event.data.as_data32();
778 let mut state = self.0.borrow_mut();
779
780 if atom == state.atoms.WM_DELETE_WINDOW {
781 // window "x" button clicked by user
782 if window.should_close() {
783 // Rest of the close logic is handled in drop_window()
784 window.close();
785 }
786 } else if atom == state.atoms._NET_WM_SYNC_REQUEST {
787 window.state.borrow_mut().last_sync_counter =
788 Some(x11rb::protocol::sync::Int64 {
789 lo: arg2,
790 hi: arg3 as i32,
791 })
792 }
793
794 if event.type_ == state.atoms.XdndEnter {
795 state.xdnd_state.other_window = atom;
796 if (arg1 & 0x1) == 0x1 {
797 state.xdnd_state.drag_type = xdnd_get_supported_atom(
798 &state.xcb_connection,
799 &state.atoms,
800 state.xdnd_state.other_window,
801 );
802 } else {
803 if let Some(atom) = [arg2, arg3, arg4]
804 .into_iter()
805 .find(|atom| xdnd_is_atom_supported(*atom, &state.atoms))
806 {
807 state.xdnd_state.drag_type = atom;
808 }
809 }
810 } else if event.type_ == state.atoms.XdndLeave {
811 let position = state.xdnd_state.position;
812 drop(state);
813 window
814 .handle_input(PlatformInput::FileDrop(FileDropEvent::Pending { position }));
815 window.handle_input(PlatformInput::FileDrop(FileDropEvent::Exited {}));
816 self.0.borrow_mut().xdnd_state = Xdnd::default();
817 } else if event.type_ == state.atoms.XdndPosition {
818 if let Ok(pos) = get_reply(
819 || "Failed to query pointer position",
820 state.xcb_connection.query_pointer(event.window),
821 ) {
822 state.xdnd_state.position =
823 Point::new(Pixels(pos.win_x as f32), Pixels(pos.win_y as f32));
824 }
825 if !state.xdnd_state.retrieved {
826 check_reply(
827 || "Failed to convert selection for drag and drop",
828 state.xcb_connection.convert_selection(
829 event.window,
830 state.atoms.XdndSelection,
831 state.xdnd_state.drag_type,
832 state.atoms.XDND_DATA,
833 arg3,
834 ),
835 )
836 .log_err();
837 }
838 xdnd_send_status(
839 &state.xcb_connection,
840 &state.atoms,
841 event.window,
842 state.xdnd_state.other_window,
843 arg4,
844 );
845 let position = state.xdnd_state.position;
846 drop(state);
847 window
848 .handle_input(PlatformInput::FileDrop(FileDropEvent::Pending { position }));
849 } else if event.type_ == state.atoms.XdndDrop {
850 xdnd_send_finished(
851 &state.xcb_connection,
852 &state.atoms,
853 event.window,
854 state.xdnd_state.other_window,
855 );
856 let position = state.xdnd_state.position;
857 drop(state);
858 window
859 .handle_input(PlatformInput::FileDrop(FileDropEvent::Submit { position }));
860 self.0.borrow_mut().xdnd_state = Xdnd::default();
861 }
862 }
863 Event::SelectionNotify(event) => {
864 let window = self.get_window(event.requestor)?;
865 let mut state = self.0.borrow_mut();
866 let reply = get_reply(
867 || "Failed to get XDND_DATA",
868 state.xcb_connection.get_property(
869 false,
870 event.requestor,
871 state.atoms.XDND_DATA,
872 AtomEnum::ANY,
873 0,
874 1024,
875 ),
876 )
877 .log_err();
878 let Some(reply) = reply else {
879 return Some(());
880 };
881 match str::from_utf8(&reply.value) {
882 Ok(file_list) => {
883 let paths: SmallVec<[_; 2]> = file_list
884 .lines()
885 .filter_map(|path| Url::parse(path).log_err())
886 .filter_map(|url| url.to_file_path().log_err())
887 .collect();
888 let input = PlatformInput::FileDrop(FileDropEvent::Entered {
889 position: state.xdnd_state.position,
890 paths: crate::ExternalPaths(paths),
891 });
892 drop(state);
893 window.handle_input(input);
894 self.0.borrow_mut().xdnd_state.retrieved = true;
895 }
896 Err(_) => {}
897 }
898 }
899 Event::ConfigureNotify(event) => {
900 let bounds = Bounds {
901 origin: Point {
902 x: event.x.into(),
903 y: event.y.into(),
904 },
905 size: Size {
906 width: event.width.into(),
907 height: event.height.into(),
908 },
909 };
910 let window = self.get_window(event.window)?;
911 window
912 .set_bounds(bounds)
913 .context("X11: Failed to set window bounds")
914 .log_err();
915 }
916 Event::PropertyNotify(event) => {
917 let window = self.get_window(event.window)?;
918 window
919 .property_notify(event)
920 .context("X11: Failed to handle property notify")
921 .log_err();
922 }
923 Event::FocusIn(event) => {
924 let window = self.get_window(event.event)?;
925 window.set_active(true);
926 let mut state = self.0.borrow_mut();
927 state.keyboard_focused_window = Some(event.event);
928 if let Some(handler) = state.xim_handler.as_mut() {
929 handler.window = event.event;
930 }
931 drop(state);
932 self.enable_ime();
933 }
934 Event::FocusOut(event) => {
935 let window = self.get_window(event.event)?;
936 window.set_active(false);
937 let mut state = self.0.borrow_mut();
938 state.keyboard_focused_window = None;
939 if let Some(compose_state) = state.compose_state.as_mut() {
940 compose_state.reset();
941 }
942 state.pre_edit_text.take();
943 drop(state);
944 self.reset_ime();
945 window.handle_ime_delete();
946 }
947 Event::XkbNewKeyboardNotify(_) | Event::XkbMapNotify(_) => {
948 let mut state = self.0.borrow_mut();
949 let xkb_state = {
950 let xkb_keymap = xkbc::x11::keymap_new_from_device(
951 &state.xkb_context,
952 &state.xcb_connection,
953 state.xkb_device_id,
954 xkbc::KEYMAP_COMPILE_NO_FLAGS,
955 );
956 xkbc::x11::state_new_from_device(
957 &xkb_keymap,
958 &state.xcb_connection,
959 state.xkb_device_id,
960 )
961 };
962 let depressed_layout = xkb_state.serialize_layout(xkbc::STATE_LAYOUT_DEPRESSED);
963 let latched_layout = xkb_state.serialize_layout(xkbc::STATE_LAYOUT_LATCHED);
964 let locked_layout = xkb_state.serialize_layout(xkbc::ffi::XKB_STATE_LAYOUT_LOCKED);
965 state.previous_xkb_state = XKBStateNotiy {
966 depressed_layout,
967 latched_layout,
968 locked_layout,
969 };
970 state.xkb = xkb_state;
971 drop(state);
972 self.handle_keyboard_layout_change();
973 }
974 Event::XkbStateNotify(event) => {
975 let mut state = self.0.borrow_mut();
976 let old_layout = state.xkb.serialize_layout(STATE_LAYOUT_EFFECTIVE);
977 let new_layout = u32::from(event.group);
978 state.xkb.update_mask(
979 event.base_mods.into(),
980 event.latched_mods.into(),
981 event.locked_mods.into(),
982 event.base_group as u32,
983 event.latched_group as u32,
984 event.locked_group.into(),
985 );
986 state.previous_xkb_state = XKBStateNotiy {
987 depressed_layout: event.base_group as u32,
988 latched_layout: event.latched_group as u32,
989 locked_layout: event.locked_group.into(),
990 };
991
992 let modifiers = Modifiers::from_xkb(&state.xkb);
993 let capslock = Capslock::from_xkb(&state.xkb);
994 if state.last_modifiers_changed_event == modifiers
995 && state.last_capslock_changed_event == capslock
996 {
997 drop(state);
998 } else {
999 let focused_window_id = state.keyboard_focused_window?;
1000 state.modifiers = modifiers;
1001 state.last_modifiers_changed_event = modifiers;
1002 state.capslock = capslock;
1003 state.last_capslock_changed_event = capslock;
1004 drop(state);
1005
1006 let focused_window = self.get_window(focused_window_id)?;
1007 focused_window.handle_input(PlatformInput::ModifiersChanged(
1008 ModifiersChangedEvent {
1009 modifiers,
1010 capslock,
1011 },
1012 ));
1013 }
1014
1015 if new_layout != old_layout {
1016 self.handle_keyboard_layout_change();
1017 }
1018 }
1019 Event::KeyPress(event) => {
1020 let window = self.get_window(event.event)?;
1021 let mut state = self.0.borrow_mut();
1022
1023 let modifiers = modifiers_from_state(event.state);
1024 state.modifiers = modifiers;
1025 state.pre_key_char_down.take();
1026 let keystroke = {
1027 let code = event.detail.into();
1028 let xkb_state = state.previous_xkb_state.clone();
1029 state.xkb.update_mask(
1030 event.state.bits() as ModMask,
1031 0,
1032 0,
1033 xkb_state.depressed_layout,
1034 xkb_state.latched_layout,
1035 xkb_state.locked_layout,
1036 );
1037 let mut keystroke = crate::Keystroke::from_xkb(&state.xkb, modifiers, code);
1038 let keysym = state.xkb.key_get_one_sym(code);
1039 if keysym.is_modifier_key() {
1040 return Some(());
1041 }
1042 if let Some(mut compose_state) = state.compose_state.take() {
1043 compose_state.feed(keysym);
1044 match compose_state.status() {
1045 xkbc::Status::Composed => {
1046 state.pre_edit_text.take();
1047 keystroke.key_char = compose_state.utf8();
1048 if let Some(keysym) = compose_state.keysym() {
1049 keystroke.key = xkbc::keysym_get_name(keysym);
1050 }
1051 }
1052 xkbc::Status::Composing => {
1053 keystroke.key_char = None;
1054 state.pre_edit_text = compose_state
1055 .utf8()
1056 .or(crate::Keystroke::underlying_dead_key(keysym));
1057 let pre_edit =
1058 state.pre_edit_text.clone().unwrap_or(String::default());
1059 drop(state);
1060 window.handle_ime_preedit(pre_edit);
1061 state = self.0.borrow_mut();
1062 }
1063 xkbc::Status::Cancelled => {
1064 let pre_edit = state.pre_edit_text.take();
1065 drop(state);
1066 if let Some(pre_edit) = pre_edit {
1067 window.handle_ime_commit(pre_edit);
1068 }
1069 if let Some(current_key) = Keystroke::underlying_dead_key(keysym) {
1070 window.handle_ime_preedit(current_key);
1071 }
1072 state = self.0.borrow_mut();
1073 compose_state.feed(keysym);
1074 }
1075 _ => {}
1076 }
1077 state.compose_state = Some(compose_state);
1078 }
1079 keystroke
1080 };
1081 drop(state);
1082 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
1083 keystroke,
1084 is_held: false,
1085 }));
1086 }
1087 Event::KeyRelease(event) => {
1088 let window = self.get_window(event.event)?;
1089 let mut state = self.0.borrow_mut();
1090
1091 let modifiers = modifiers_from_state(event.state);
1092 state.modifiers = modifiers;
1093
1094 let keystroke = {
1095 let code = event.detail.into();
1096 let xkb_state = state.previous_xkb_state.clone();
1097 state.xkb.update_mask(
1098 event.state.bits() as ModMask,
1099 0,
1100 0,
1101 xkb_state.depressed_layout,
1102 xkb_state.latched_layout,
1103 xkb_state.locked_layout,
1104 );
1105 let keystroke = crate::Keystroke::from_xkb(&state.xkb, modifiers, code);
1106 let keysym = state.xkb.key_get_one_sym(code);
1107 if keysym.is_modifier_key() {
1108 return Some(());
1109 }
1110 keystroke
1111 };
1112 drop(state);
1113 window.handle_input(PlatformInput::KeyUp(crate::KeyUpEvent { keystroke }));
1114 }
1115 Event::XinputButtonPress(event) => {
1116 let window = self.get_window(event.event)?;
1117 let mut state = self.0.borrow_mut();
1118
1119 let modifiers = modifiers_from_xinput_info(event.mods);
1120 state.modifiers = modifiers;
1121
1122 let position = point(
1123 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1124 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1125 );
1126
1127 if state.composing && state.ximc.is_some() {
1128 drop(state);
1129 self.reset_ime();
1130 window.handle_ime_unmark();
1131 state = self.0.borrow_mut();
1132 } else if let Some(text) = state.pre_edit_text.take() {
1133 if let Some(compose_state) = state.compose_state.as_mut() {
1134 compose_state.reset();
1135 }
1136 drop(state);
1137 window.handle_ime_commit(text);
1138 state = self.0.borrow_mut();
1139 }
1140 match button_or_scroll_from_event_detail(event.detail) {
1141 Some(ButtonOrScroll::Button(button)) => {
1142 let click_elapsed = state.last_click.elapsed();
1143 if click_elapsed < DOUBLE_CLICK_INTERVAL
1144 && state
1145 .last_mouse_button
1146 .is_some_and(|prev_button| prev_button == button)
1147 && is_within_click_distance(state.last_location, position)
1148 {
1149 state.current_count += 1;
1150 } else {
1151 state.current_count = 1;
1152 }
1153
1154 state.last_click = Instant::now();
1155 state.last_mouse_button = Some(button);
1156 state.last_location = position;
1157 let current_count = state.current_count;
1158
1159 drop(state);
1160 window.handle_input(PlatformInput::MouseDown(crate::MouseDownEvent {
1161 button,
1162 position,
1163 modifiers,
1164 click_count: current_count,
1165 first_mouse: false,
1166 }));
1167 }
1168 Some(ButtonOrScroll::Scroll(direction)) => {
1169 drop(state);
1170 // Emulated scroll button presses are sent simultaneously with smooth scrolling XinputMotion events.
1171 // Since handling those events does the scrolling, they are skipped here.
1172 if !event
1173 .flags
1174 .contains(xinput::PointerEventFlags::POINTER_EMULATED)
1175 {
1176 let scroll_delta = match direction {
1177 ScrollDirection::Up => Point::new(0.0, SCROLL_LINES),
1178 ScrollDirection::Down => Point::new(0.0, -SCROLL_LINES),
1179 ScrollDirection::Left => Point::new(SCROLL_LINES, 0.0),
1180 ScrollDirection::Right => Point::new(-SCROLL_LINES, 0.0),
1181 };
1182 window.handle_input(PlatformInput::ScrollWheel(
1183 make_scroll_wheel_event(position, scroll_delta, modifiers),
1184 ));
1185 }
1186 }
1187 None => {
1188 log::error!("Unknown x11 button: {}", event.detail);
1189 }
1190 }
1191 }
1192 Event::XinputButtonRelease(event) => {
1193 let window = self.get_window(event.event)?;
1194 let mut state = self.0.borrow_mut();
1195 let modifiers = modifiers_from_xinput_info(event.mods);
1196 state.modifiers = modifiers;
1197
1198 let position = point(
1199 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1200 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1201 );
1202 match button_or_scroll_from_event_detail(event.detail) {
1203 Some(ButtonOrScroll::Button(button)) => {
1204 let click_count = state.current_count;
1205 drop(state);
1206 window.handle_input(PlatformInput::MouseUp(crate::MouseUpEvent {
1207 button,
1208 position,
1209 modifiers,
1210 click_count,
1211 }));
1212 }
1213 Some(ButtonOrScroll::Scroll(_)) => {}
1214 None => {}
1215 }
1216 }
1217 Event::XinputMotion(event) => {
1218 let window = self.get_window(event.event)?;
1219 let mut state = self.0.borrow_mut();
1220 let pressed_button = pressed_button_from_mask(event.button_mask[0]);
1221 let position = point(
1222 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1223 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1224 );
1225 let modifiers = modifiers_from_xinput_info(event.mods);
1226 state.modifiers = modifiers;
1227 drop(state);
1228
1229 if event.valuator_mask[0] & 3 != 0 {
1230 window.handle_input(PlatformInput::MouseMove(crate::MouseMoveEvent {
1231 position,
1232 pressed_button,
1233 modifiers,
1234 }));
1235 }
1236
1237 state = self.0.borrow_mut();
1238 if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
1239 let scroll_delta = get_scroll_delta_and_update_state(&mut pointer, &event);
1240 drop(state);
1241 if let Some(scroll_delta) = scroll_delta {
1242 window.handle_input(PlatformInput::ScrollWheel(make_scroll_wheel_event(
1243 position,
1244 scroll_delta,
1245 modifiers,
1246 )));
1247 }
1248 }
1249 }
1250 Event::XinputEnter(event) if event.mode == xinput::NotifyMode::NORMAL => {
1251 let window = self.get_window(event.event)?;
1252 window.set_hovered(true);
1253 let mut state = self.0.borrow_mut();
1254 state.mouse_focused_window = Some(event.event);
1255 }
1256 Event::XinputLeave(event) if event.mode == xinput::NotifyMode::NORMAL => {
1257 let mut state = self.0.borrow_mut();
1258
1259 // 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)
1260 reset_all_pointer_device_scroll_positions(&mut state.pointer_device_states);
1261 state.mouse_focused_window = None;
1262 let pressed_button = pressed_button_from_mask(event.buttons[0]);
1263 let position = point(
1264 px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
1265 px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
1266 );
1267 let modifiers = modifiers_from_xinput_info(event.mods);
1268 state.modifiers = modifiers;
1269 drop(state);
1270
1271 let window = self.get_window(event.event)?;
1272 window.handle_input(PlatformInput::MouseExited(crate::MouseExitEvent {
1273 pressed_button,
1274 position,
1275 modifiers,
1276 }));
1277 window.set_hovered(false);
1278 }
1279 Event::XinputHierarchy(event) => {
1280 let mut state = self.0.borrow_mut();
1281 // Temporarily use `state.pointer_device_states` to only store pointers that still have valid scroll values.
1282 // Any change to a device invalidates its scroll values.
1283 for info in event.infos {
1284 if is_pointer_device(info.type_) {
1285 state.pointer_device_states.remove(&info.deviceid);
1286 }
1287 }
1288 if let Some(pointer_device_states) = current_pointer_device_states(
1289 &state.xcb_connection,
1290 &state.pointer_device_states,
1291 ) {
1292 state.pointer_device_states = pointer_device_states;
1293 }
1294 }
1295 Event::XinputDeviceChanged(event) => {
1296 let mut state = self.0.borrow_mut();
1297 if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
1298 reset_pointer_device_scroll_positions(&mut pointer);
1299 }
1300 }
1301 _ => {}
1302 };
1303
1304 Some(())
1305 }
1306
1307 fn handle_xim_callback_event(&self, event: XimCallbackEvent) {
1308 match event {
1309 XimCallbackEvent::XimXEvent(event) => {
1310 self.handle_event(event);
1311 }
1312 XimCallbackEvent::XimCommitEvent(window, text) => {
1313 self.xim_handle_commit(window, text);
1314 }
1315 XimCallbackEvent::XimPreeditEvent(window, text) => {
1316 self.xim_handle_preedit(window, text);
1317 }
1318 };
1319 }
1320
1321 fn xim_handle_event(&self, event: Event) -> Option<()> {
1322 match event {
1323 Event::KeyPress(event) | Event::KeyRelease(event) => {
1324 let mut state = self.0.borrow_mut();
1325 state.pre_key_char_down = Some(Keystroke::from_xkb(
1326 &state.xkb,
1327 state.modifiers,
1328 event.detail.into(),
1329 ));
1330 let (mut ximc, mut xim_handler) = state.take_xim()?;
1331 drop(state);
1332 xim_handler.window = event.event;
1333 ximc.forward_event(
1334 xim_handler.im_id,
1335 xim_handler.ic_id,
1336 xim::ForwardEventFlag::empty(),
1337 &event,
1338 )
1339 .context("X11: Failed to forward XIM event")
1340 .log_err();
1341 let mut state = self.0.borrow_mut();
1342 state.restore_xim(ximc, xim_handler);
1343 drop(state);
1344 }
1345 event => {
1346 self.handle_event(event);
1347 }
1348 }
1349 Some(())
1350 }
1351
1352 fn xim_handle_commit(&self, window: xproto::Window, text: String) -> Option<()> {
1353 let Some(window) = self.get_window(window) else {
1354 log::error!("bug: Failed to get window for XIM commit");
1355 return None;
1356 };
1357 let mut state = self.0.borrow_mut();
1358 let keystroke = state.pre_key_char_down.take();
1359 state.composing = false;
1360 drop(state);
1361 if let Some(mut keystroke) = keystroke {
1362 keystroke.key_char = Some(text.clone());
1363 window.handle_input(PlatformInput::KeyDown(crate::KeyDownEvent {
1364 keystroke,
1365 is_held: false,
1366 }));
1367 }
1368
1369 Some(())
1370 }
1371
1372 fn xim_handle_preedit(&self, window: xproto::Window, text: String) -> Option<()> {
1373 let Some(window) = self.get_window(window) else {
1374 log::error!("bug: Failed to get window for XIM preedit");
1375 return None;
1376 };
1377
1378 let mut state = self.0.borrow_mut();
1379 let (mut ximc, mut xim_handler) = state.take_xim()?;
1380 state.composing = !text.is_empty();
1381 drop(state);
1382 window.handle_ime_preedit(text);
1383
1384 if let Some(area) = window.get_ime_area() {
1385 let ic_attributes = ximc
1386 .build_ic_attributes()
1387 .push(
1388 xim::AttributeName::InputStyle,
1389 xim::InputStyle::PREEDIT_CALLBACKS,
1390 )
1391 .push(xim::AttributeName::ClientWindow, xim_handler.window)
1392 .push(xim::AttributeName::FocusWindow, xim_handler.window)
1393 .nested_list(xim::AttributeName::PreeditAttributes, |b| {
1394 b.push(
1395 xim::AttributeName::SpotLocation,
1396 xim::Point {
1397 x: u32::from(area.origin.x + area.size.width) as i16,
1398 y: u32::from(area.origin.y + area.size.height) as i16,
1399 },
1400 );
1401 })
1402 .build();
1403 ximc.set_ic_values(xim_handler.im_id, xim_handler.ic_id, ic_attributes)
1404 .ok();
1405 }
1406 let mut state = self.0.borrow_mut();
1407 state.restore_xim(ximc, xim_handler);
1408 drop(state);
1409 Some(())
1410 }
1411
1412 fn handle_keyboard_layout_change(&self) {
1413 let mut state = self.0.borrow_mut();
1414 let layout_idx = state.xkb.serialize_layout(STATE_LAYOUT_EFFECTIVE);
1415 let keymap = state.xkb.get_keymap();
1416 let layout_name = keymap.layout_get_name(layout_idx);
1417 if layout_name != state.keyboard_layout.name() {
1418 state.keyboard_layout = LinuxKeyboardLayout::new(layout_name.to_string().into());
1419 if let Some(mut callback) = state.common.callbacks.keyboard_layout_change.take() {
1420 drop(state);
1421 callback();
1422 state = self.0.borrow_mut();
1423 state.common.callbacks.keyboard_layout_change = Some(callback);
1424 }
1425 }
1426 }
1427}
1428
1429impl LinuxClient for X11Client {
1430 fn compositor_name(&self) -> &'static str {
1431 "X11"
1432 }
1433
1434 fn with_common<R>(&self, f: impl FnOnce(&mut LinuxCommon) -> R) -> R {
1435 f(&mut self.0.borrow_mut().common)
1436 }
1437
1438 fn keyboard_layout(&self) -> Box<dyn PlatformKeyboardLayout> {
1439 let state = self.0.borrow();
1440 Box::new(state.keyboard_layout.clone())
1441 }
1442
1443 fn displays(&self) -> Vec<Rc<dyn PlatformDisplay>> {
1444 let state = self.0.borrow();
1445 let setup = state.xcb_connection.setup();
1446 setup
1447 .roots
1448 .iter()
1449 .enumerate()
1450 .filter_map(|(root_id, _)| {
1451 Some(Rc::new(
1452 X11Display::new(&state.xcb_connection, state.scale_factor, root_id).ok()?,
1453 ) as Rc<dyn PlatformDisplay>)
1454 })
1455 .collect()
1456 }
1457
1458 fn primary_display(&self) -> Option<Rc<dyn PlatformDisplay>> {
1459 let state = self.0.borrow();
1460 X11Display::new(
1461 &state.xcb_connection,
1462 state.scale_factor,
1463 state.x_root_index,
1464 )
1465 .log_err()
1466 .map(|display| Rc::new(display) as Rc<dyn PlatformDisplay>)
1467 }
1468
1469 fn display(&self, id: DisplayId) -> Option<Rc<dyn PlatformDisplay>> {
1470 let state = self.0.borrow();
1471
1472 Some(Rc::new(
1473 X11Display::new(&state.xcb_connection, state.scale_factor, id.0 as usize).ok()?,
1474 ))
1475 }
1476
1477 #[cfg(feature = "screen-capture")]
1478 fn is_screen_capture_supported(&self) -> bool {
1479 true
1480 }
1481
1482 #[cfg(feature = "screen-capture")]
1483 fn screen_capture_sources(
1484 &self,
1485 ) -> futures::channel::oneshot::Receiver<anyhow::Result<Vec<Box<dyn crate::ScreenCaptureSource>>>>
1486 {
1487 crate::platform::scap_screen_capture::scap_screen_sources(
1488 &self.0.borrow().common.foreground_executor,
1489 )
1490 }
1491
1492 fn open_window(
1493 &self,
1494 handle: AnyWindowHandle,
1495 params: WindowParams,
1496 ) -> anyhow::Result<Box<dyn PlatformWindow>> {
1497 let mut state = self.0.borrow_mut();
1498 let x_window = state
1499 .xcb_connection
1500 .generate_id()
1501 .context("X11: Failed to generate window ID")?;
1502
1503 let window = X11Window::new(
1504 handle,
1505 X11ClientStatePtr(Rc::downgrade(&self.0)),
1506 state.common.foreground_executor.clone(),
1507 &state.gpu_context,
1508 params,
1509 &state.xcb_connection,
1510 state.client_side_decorations_supported,
1511 state.x_root_index,
1512 x_window,
1513 &state.atoms,
1514 state.scale_factor,
1515 state.common.appearance,
1516 )?;
1517 check_reply(
1518 || "Failed to set XdndAware property",
1519 state.xcb_connection.change_property32(
1520 xproto::PropMode::REPLACE,
1521 x_window,
1522 state.atoms.XdndAware,
1523 state.atoms.XA_ATOM,
1524 &[5],
1525 ),
1526 )
1527 .log_err();
1528 xcb_flush(&state.xcb_connection);
1529
1530 let window_ref = WindowRef {
1531 window: window.0.clone(),
1532 refresh_state: None,
1533 expose_event_received: false,
1534 last_visibility: Visibility::UNOBSCURED,
1535 is_mapped: false,
1536 };
1537
1538 state.windows.insert(x_window, window_ref);
1539 Ok(Box::new(window))
1540 }
1541
1542 fn set_cursor_style(&self, style: CursorStyle) {
1543 let mut state = self.0.borrow_mut();
1544 let Some(focused_window) = state.mouse_focused_window else {
1545 return;
1546 };
1547 let current_style = state
1548 .cursor_styles
1549 .get(&focused_window)
1550 .unwrap_or(&CursorStyle::Arrow);
1551 if *current_style == style {
1552 return;
1553 }
1554
1555 let Some(cursor) = state.get_cursor_icon(style) else {
1556 return;
1557 };
1558
1559 state.cursor_styles.insert(focused_window, style);
1560 check_reply(
1561 || "Failed to set cursor style",
1562 state.xcb_connection.change_window_attributes(
1563 focused_window,
1564 &ChangeWindowAttributesAux {
1565 cursor: Some(cursor),
1566 ..Default::default()
1567 },
1568 ),
1569 )
1570 .log_err();
1571 state.xcb_connection.flush().log_err();
1572 }
1573
1574 fn open_uri(&self, uri: &str) {
1575 #[cfg(any(feature = "wayland", feature = "x11"))]
1576 open_uri_internal(self.background_executor(), uri, None);
1577 }
1578
1579 fn reveal_path(&self, path: PathBuf) {
1580 #[cfg(any(feature = "x11", feature = "wayland"))]
1581 reveal_path_internal(self.background_executor(), path, None);
1582 }
1583
1584 fn write_to_primary(&self, item: crate::ClipboardItem) {
1585 let state = self.0.borrow_mut();
1586 state
1587 .clipboard
1588 .set_text(
1589 std::borrow::Cow::Owned(item.text().unwrap_or_default()),
1590 clipboard::ClipboardKind::Primary,
1591 clipboard::WaitConfig::None,
1592 )
1593 .context("X11 Failed to write to clipboard (primary)")
1594 .log_with_level(log::Level::Debug);
1595 }
1596
1597 fn write_to_clipboard(&self, item: crate::ClipboardItem) {
1598 let mut state = self.0.borrow_mut();
1599 state
1600 .clipboard
1601 .set_text(
1602 std::borrow::Cow::Owned(item.text().unwrap_or_default()),
1603 clipboard::ClipboardKind::Clipboard,
1604 clipboard::WaitConfig::None,
1605 )
1606 .context("X11: Failed to write to clipboard (clipboard)")
1607 .log_with_level(log::Level::Debug);
1608 state.clipboard_item.replace(item);
1609 }
1610
1611 fn read_from_primary(&self) -> Option<crate::ClipboardItem> {
1612 let state = self.0.borrow_mut();
1613 return state
1614 .clipboard
1615 .get_any(clipboard::ClipboardKind::Primary)
1616 .context("X11: Failed to read from clipboard (primary)")
1617 .log_with_level(log::Level::Debug);
1618 }
1619
1620 fn read_from_clipboard(&self) -> Option<crate::ClipboardItem> {
1621 let state = self.0.borrow_mut();
1622 // if the last copy was from this app, return our cached item
1623 // which has metadata attached.
1624 if state
1625 .clipboard
1626 .is_owner(clipboard::ClipboardKind::Clipboard)
1627 {
1628 return state.clipboard_item.clone();
1629 }
1630 return state
1631 .clipboard
1632 .get_any(clipboard::ClipboardKind::Clipboard)
1633 .context("X11: Failed to read from clipboard (clipboard)")
1634 .log_with_level(log::Level::Debug);
1635 }
1636
1637 fn run(&self) {
1638 let Some(mut event_loop) = self
1639 .0
1640 .borrow_mut()
1641 .event_loop
1642 .take()
1643 .context("X11Client::run called but it's already running")
1644 .log_err()
1645 else {
1646 return;
1647 };
1648
1649 event_loop.run(None, &mut self.clone(), |_| {}).log_err();
1650 }
1651
1652 fn active_window(&self) -> Option<AnyWindowHandle> {
1653 let state = self.0.borrow();
1654 state.keyboard_focused_window.and_then(|focused_window| {
1655 state
1656 .windows
1657 .get(&focused_window)
1658 .map(|window| window.handle())
1659 })
1660 }
1661
1662 fn window_stack(&self) -> Option<Vec<AnyWindowHandle>> {
1663 let state = self.0.borrow();
1664 let root = state.xcb_connection.setup().roots[state.x_root_index].root;
1665
1666 let reply = state
1667 .xcb_connection
1668 .get_property(
1669 false,
1670 root,
1671 state.atoms._NET_CLIENT_LIST_STACKING,
1672 xproto::AtomEnum::WINDOW,
1673 0,
1674 u32::MAX,
1675 )
1676 .ok()?
1677 .reply()
1678 .ok()?;
1679
1680 let window_ids = reply
1681 .value
1682 .chunks_exact(4)
1683 .filter_map(|chunk| chunk.try_into().ok().map(u32::from_ne_bytes))
1684 .collect::<Vec<xproto::Window>>();
1685
1686 let mut handles = Vec::new();
1687
1688 // We need to reverse, since _NET_CLIENT_LIST_STACKING has
1689 // a back-to-front order.
1690 // See: https://specifications.freedesktop.org/wm-spec/1.3/ar01s03.html
1691 for window_ref in window_ids
1692 .iter()
1693 .rev()
1694 .filter_map(|&win| state.windows.get(&win))
1695 {
1696 if !window_ref.window.state.borrow().destroyed {
1697 handles.push(window_ref.handle());
1698 }
1699 }
1700
1701 Some(handles)
1702 }
1703}
1704
1705impl X11ClientState {
1706 fn has_xim(&self) -> bool {
1707 self.ximc.is_some() && self.xim_handler.is_some()
1708 }
1709
1710 fn take_xim(&mut self) -> Option<(X11rbClient<Rc<XCBConnection>>, XimHandler)> {
1711 let ximc = self
1712 .ximc
1713 .take()
1714 .ok_or(anyhow!("bug: XIM connection not set"))
1715 .log_err()?;
1716 if let Some(xim_handler) = self.xim_handler.take() {
1717 Some((ximc, xim_handler))
1718 } else {
1719 self.ximc = Some(ximc);
1720 log::error!("bug: XIM handler not set");
1721 None
1722 }
1723 }
1724
1725 fn restore_xim(&mut self, ximc: X11rbClient<Rc<XCBConnection>>, xim_handler: XimHandler) {
1726 self.ximc = Some(ximc);
1727 self.xim_handler = Some(xim_handler);
1728 }
1729
1730 fn update_refresh_loop(&mut self, x_window: xproto::Window) {
1731 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1732 return;
1733 };
1734 let is_visible = window_ref.is_mapped
1735 && !matches!(window_ref.last_visibility, Visibility::FULLY_OBSCURED);
1736 match (is_visible, window_ref.refresh_state.take()) {
1737 (false, refresh_state @ Some(RefreshState::Hidden { .. }))
1738 | (false, refresh_state @ None)
1739 | (true, refresh_state @ Some(RefreshState::PeriodicRefresh { .. })) => {
1740 window_ref.refresh_state = refresh_state;
1741 }
1742 (
1743 false,
1744 Some(RefreshState::PeriodicRefresh {
1745 refresh_rate,
1746 event_loop_token,
1747 }),
1748 ) => {
1749 self.loop_handle.remove(event_loop_token);
1750 window_ref.refresh_state = Some(RefreshState::Hidden { refresh_rate });
1751 }
1752 (true, Some(RefreshState::Hidden { refresh_rate })) => {
1753 let event_loop_token = self.start_refresh_loop(x_window, refresh_rate);
1754 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1755 return;
1756 };
1757 window_ref.refresh_state = Some(RefreshState::PeriodicRefresh {
1758 refresh_rate,
1759 event_loop_token,
1760 });
1761 }
1762 (true, None) => {
1763 let Some(screen_resources) = get_reply(
1764 || "Failed to get screen resources",
1765 self.xcb_connection
1766 .randr_get_screen_resources_current(x_window),
1767 )
1768 .log_err() else {
1769 return;
1770 };
1771
1772 // Ideally this would be re-queried when the window changes screens, but there
1773 // doesn't seem to be an efficient / straightforward way to do this. Should also be
1774 // updated when screen configurations change.
1775 let mode_info = screen_resources.crtcs.iter().find_map(|crtc| {
1776 let crtc_info = self
1777 .xcb_connection
1778 .randr_get_crtc_info(*crtc, x11rb::CURRENT_TIME)
1779 .ok()?
1780 .reply()
1781 .ok()?;
1782
1783 screen_resources
1784 .modes
1785 .iter()
1786 .find(|m| m.id == crtc_info.mode)
1787 });
1788 let refresh_rate = match mode_info {
1789 Some(mode_info) => mode_refresh_rate(mode_info),
1790 None => {
1791 log::error!(
1792 "Failed to get screen mode info from xrandr, \
1793 defaulting to 60hz refresh rate."
1794 );
1795 Duration::from_micros(1_000_000 / 60)
1796 }
1797 };
1798
1799 let event_loop_token = self.start_refresh_loop(x_window, refresh_rate);
1800 let Some(window_ref) = self.windows.get_mut(&x_window) else {
1801 return;
1802 };
1803 window_ref.refresh_state = Some(RefreshState::PeriodicRefresh {
1804 refresh_rate,
1805 event_loop_token,
1806 });
1807 }
1808 }
1809 }
1810
1811 #[must_use]
1812 fn start_refresh_loop(
1813 &self,
1814 x_window: xproto::Window,
1815 refresh_rate: Duration,
1816 ) -> RegistrationToken {
1817 self.loop_handle
1818 .insert_source(calloop::timer::Timer::immediate(), {
1819 move |mut instant, (), client| {
1820 let xcb_connection = {
1821 let mut state = client.0.borrow_mut();
1822 let xcb_connection = state.xcb_connection.clone();
1823 if let Some(window) = state.windows.get_mut(&x_window) {
1824 let expose_event_received = window.expose_event_received;
1825 window.expose_event_received = false;
1826 let window = window.window.clone();
1827 drop(state);
1828 window.refresh(RequestFrameOptions {
1829 require_presentation: expose_event_received,
1830 });
1831 }
1832 xcb_connection
1833 };
1834 client.process_x11_events(&xcb_connection).log_err();
1835
1836 // Take into account that some frames have been skipped
1837 let now = Instant::now();
1838 while instant < now {
1839 instant += refresh_rate;
1840 }
1841 calloop::timer::TimeoutAction::ToInstant(instant)
1842 }
1843 })
1844 .expect("Failed to initialize window refresh timer")
1845 }
1846
1847 fn get_cursor_icon(&mut self, style: CursorStyle) -> Option<xproto::Cursor> {
1848 if let Some(cursor) = self.cursor_cache.get(&style) {
1849 return *cursor;
1850 }
1851
1852 let mut result;
1853 match style {
1854 CursorStyle::None => match create_invisible_cursor(&self.xcb_connection) {
1855 Ok(loaded_cursor) => result = Ok(loaded_cursor),
1856 Err(err) => result = Err(err.context("X11: error while creating invisible cursor")),
1857 },
1858 _ => 'outer: {
1859 let mut errors = String::new();
1860 let cursor_icon_names = style.to_icon_names();
1861 for cursor_icon_name in cursor_icon_names {
1862 match self
1863 .cursor_handle
1864 .load_cursor(&self.xcb_connection, cursor_icon_name)
1865 {
1866 Ok(loaded_cursor) => {
1867 if loaded_cursor != x11rb::NONE {
1868 result = Ok(loaded_cursor);
1869 break 'outer;
1870 }
1871 }
1872 Err(err) => {
1873 errors.push_str(&err.to_string());
1874 errors.push('\n');
1875 }
1876 }
1877 }
1878 if errors.is_empty() {
1879 result = Err(anyhow!(
1880 "errors while loading cursor icons {:?}:\n{}",
1881 cursor_icon_names,
1882 errors
1883 ));
1884 } else {
1885 result = Err(anyhow!("did not find cursor icons {:?}", cursor_icon_names));
1886 }
1887 }
1888 };
1889
1890 let cursor = match result {
1891 Ok(cursor) => Some(cursor),
1892 Err(err) => {
1893 match self
1894 .cursor_handle
1895 .load_cursor(&self.xcb_connection, DEFAULT_CURSOR_ICON_NAME)
1896 {
1897 Ok(default) => {
1898 log_cursor_icon_warning(err.context(format!(
1899 "X11: error loading cursor icon, falling back on default icon '{}'",
1900 DEFAULT_CURSOR_ICON_NAME
1901 )));
1902 Some(default)
1903 }
1904 Err(default_err) => {
1905 log_cursor_icon_warning(err.context(default_err).context(format!(
1906 "X11: error loading default cursor fallback '{}'",
1907 DEFAULT_CURSOR_ICON_NAME
1908 )));
1909 None
1910 }
1911 }
1912 }
1913 };
1914
1915 self.cursor_cache.insert(style, cursor);
1916 cursor
1917 }
1918}
1919
1920// Adapted from:
1921// https://docs.rs/winit/0.29.11/src/winit/platform_impl/linux/x11/monitor.rs.html#103-111
1922pub fn mode_refresh_rate(mode: &randr::ModeInfo) -> Duration {
1923 if mode.dot_clock == 0 || mode.htotal == 0 || mode.vtotal == 0 {
1924 return Duration::from_millis(16);
1925 }
1926
1927 let millihertz = mode.dot_clock as u64 * 1_000 / (mode.htotal as u64 * mode.vtotal as u64);
1928 let micros = 1_000_000_000 / millihertz;
1929 log::info!("Refreshing every {}ms", micros / 1_000);
1930 Duration::from_micros(micros)
1931}
1932
1933fn fp3232_to_f32(value: xinput::Fp3232) -> f32 {
1934 value.integral as f32 + value.frac as f32 / u32::MAX as f32
1935}
1936
1937fn check_compositor_present(xcb_connection: &XCBConnection, root: u32) -> bool {
1938 // Method 1: Check for _NET_WM_CM_S{root}
1939 let atom_name = format!("_NET_WM_CM_S{}", root);
1940 let atom1 = get_reply(
1941 || format!("Failed to intern {atom_name}"),
1942 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1943 );
1944 let method1 = match atom1.log_with_level(Level::Debug) {
1945 Some(reply) if reply.atom != x11rb::NONE => {
1946 let atom = reply.atom;
1947 get_reply(
1948 || format!("Failed to get {atom_name} owner"),
1949 xcb_connection.get_selection_owner(atom),
1950 )
1951 .map(|reply| reply.owner != 0)
1952 .log_with_level(Level::Debug)
1953 .unwrap_or(false)
1954 }
1955 _ => false,
1956 };
1957
1958 // Method 2: Check for _NET_WM_CM_OWNER
1959 let atom_name = "_NET_WM_CM_OWNER";
1960 let atom2 = get_reply(
1961 || format!("Failed to intern {atom_name}"),
1962 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1963 );
1964 let method2 = match atom2.log_with_level(Level::Debug) {
1965 Some(reply) if reply.atom != x11rb::NONE => {
1966 let atom = reply.atom;
1967 get_reply(
1968 || format!("Failed to get {atom_name}"),
1969 xcb_connection.get_property(false, root, atom, xproto::AtomEnum::WINDOW, 0, 1),
1970 )
1971 .map(|reply| reply.value_len > 0)
1972 .unwrap_or(false)
1973 }
1974 _ => return false,
1975 };
1976
1977 // Method 3: Check for _NET_SUPPORTING_WM_CHECK
1978 let atom_name = "_NET_SUPPORTING_WM_CHECK";
1979 let atom3 = get_reply(
1980 || format!("Failed to intern {atom_name}"),
1981 xcb_connection.intern_atom(false, atom_name.as_bytes()),
1982 );
1983 let method3 = match atom3.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 log::debug!(
1997 "Compositor detection: _NET_WM_CM_S?={}, _NET_WM_CM_OWNER={}, _NET_SUPPORTING_WM_CHECK={}",
1998 method1,
1999 method2,
2000 method3
2001 );
2002
2003 method1 || method2 || method3
2004}
2005
2006fn check_gtk_frame_extents_supported(
2007 xcb_connection: &XCBConnection,
2008 atoms: &XcbAtoms,
2009 root: xproto::Window,
2010) -> bool {
2011 let Some(supported_atoms) = get_reply(
2012 || "Failed to get _NET_SUPPORTED",
2013 xcb_connection.get_property(
2014 false,
2015 root,
2016 atoms._NET_SUPPORTED,
2017 xproto::AtomEnum::ATOM,
2018 0,
2019 1024,
2020 ),
2021 )
2022 .log_with_level(Level::Debug) else {
2023 return false;
2024 };
2025
2026 let supported_atom_ids: Vec<u32> = supported_atoms
2027 .value
2028 .chunks_exact(4)
2029 .filter_map(|chunk| chunk.try_into().ok().map(u32::from_ne_bytes))
2030 .collect();
2031
2032 supported_atom_ids.contains(&atoms._GTK_FRAME_EXTENTS)
2033}
2034
2035fn xdnd_is_atom_supported(atom: u32, atoms: &XcbAtoms) -> bool {
2036 return atom == atoms.TEXT
2037 || atom == atoms.STRING
2038 || atom == atoms.UTF8_STRING
2039 || atom == atoms.TEXT_PLAIN
2040 || atom == atoms.TEXT_PLAIN_UTF8
2041 || atom == atoms.TextUriList;
2042}
2043
2044fn xdnd_get_supported_atom(
2045 xcb_connection: &XCBConnection,
2046 supported_atoms: &XcbAtoms,
2047 target: xproto::Window,
2048) -> u32 {
2049 if let Some(reply) = get_reply(
2050 || "Failed to get XDnD supported atoms",
2051 xcb_connection.get_property(
2052 false,
2053 target,
2054 supported_atoms.XdndTypeList,
2055 AtomEnum::ANY,
2056 0,
2057 1024,
2058 ),
2059 )
2060 .log_with_level(Level::Warn)
2061 {
2062 if let Some(atoms) = reply.value32() {
2063 for atom in atoms {
2064 if xdnd_is_atom_supported(atom, &supported_atoms) {
2065 return atom;
2066 }
2067 }
2068 }
2069 }
2070 return 0;
2071}
2072
2073fn xdnd_send_finished(
2074 xcb_connection: &XCBConnection,
2075 atoms: &XcbAtoms,
2076 source: xproto::Window,
2077 target: xproto::Window,
2078) {
2079 let message = ClientMessageEvent {
2080 format: 32,
2081 window: target,
2082 type_: atoms.XdndFinished,
2083 data: ClientMessageData::from([source, 1, atoms.XdndActionCopy, 0, 0]),
2084 sequence: 0,
2085 response_type: xproto::CLIENT_MESSAGE_EVENT,
2086 };
2087 check_reply(
2088 || "Failed to send XDnD finished event",
2089 xcb_connection.send_event(false, target, EventMask::default(), message),
2090 )
2091 .log_err();
2092 xcb_connection.flush().log_err();
2093}
2094
2095fn xdnd_send_status(
2096 xcb_connection: &XCBConnection,
2097 atoms: &XcbAtoms,
2098 source: xproto::Window,
2099 target: xproto::Window,
2100 action: u32,
2101) {
2102 let message = ClientMessageEvent {
2103 format: 32,
2104 window: target,
2105 type_: atoms.XdndStatus,
2106 data: ClientMessageData::from([source, 1, 0, 0, action]),
2107 sequence: 0,
2108 response_type: xproto::CLIENT_MESSAGE_EVENT,
2109 };
2110 check_reply(
2111 || "Failed to send XDnD status event",
2112 xcb_connection.send_event(false, target, EventMask::default(), message),
2113 )
2114 .log_err();
2115 xcb_connection.flush().log_err();
2116}
2117
2118/// Recomputes `pointer_device_states` by querying all pointer devices.
2119/// When a device is present in `scroll_values_to_preserve`, its value for `ScrollAxisState.scroll_value` is used.
2120fn current_pointer_device_states(
2121 xcb_connection: &XCBConnection,
2122 scroll_values_to_preserve: &BTreeMap<xinput::DeviceId, PointerDeviceState>,
2123) -> Option<BTreeMap<xinput::DeviceId, PointerDeviceState>> {
2124 let devices_query_result = get_reply(
2125 || "Failed to query XInput devices",
2126 xcb_connection.xinput_xi_query_device(XINPUT_ALL_DEVICES),
2127 )
2128 .log_err()?;
2129
2130 let mut pointer_device_states = BTreeMap::new();
2131 pointer_device_states.extend(
2132 devices_query_result
2133 .infos
2134 .iter()
2135 .filter(|info| is_pointer_device(info.type_))
2136 .filter_map(|info| {
2137 let scroll_data = info
2138 .classes
2139 .iter()
2140 .filter_map(|class| class.data.as_scroll())
2141 .map(|class| *class)
2142 .rev()
2143 .collect::<Vec<_>>();
2144 let old_state = scroll_values_to_preserve.get(&info.deviceid);
2145 let old_horizontal = old_state.map(|state| &state.horizontal);
2146 let old_vertical = old_state.map(|state| &state.vertical);
2147 let horizontal = scroll_data
2148 .iter()
2149 .find(|data| data.scroll_type == xinput::ScrollType::HORIZONTAL)
2150 .map(|data| scroll_data_to_axis_state(data, old_horizontal));
2151 let vertical = scroll_data
2152 .iter()
2153 .find(|data| data.scroll_type == xinput::ScrollType::VERTICAL)
2154 .map(|data| scroll_data_to_axis_state(data, old_vertical));
2155 if horizontal.is_none() && vertical.is_none() {
2156 None
2157 } else {
2158 Some((
2159 info.deviceid,
2160 PointerDeviceState {
2161 horizontal: horizontal.unwrap_or_else(Default::default),
2162 vertical: vertical.unwrap_or_else(Default::default),
2163 },
2164 ))
2165 }
2166 }),
2167 );
2168 if pointer_device_states.is_empty() {
2169 log::error!("Found no xinput mouse pointers.");
2170 }
2171 return Some(pointer_device_states);
2172}
2173
2174/// Returns true if the device is a pointer device. Does not include pointer device groups.
2175fn is_pointer_device(type_: xinput::DeviceType) -> bool {
2176 type_ == xinput::DeviceType::SLAVE_POINTER
2177}
2178
2179fn scroll_data_to_axis_state(
2180 data: &xinput::DeviceClassDataScroll,
2181 old_axis_state_with_valid_scroll_value: Option<&ScrollAxisState>,
2182) -> ScrollAxisState {
2183 ScrollAxisState {
2184 valuator_number: Some(data.number),
2185 multiplier: SCROLL_LINES / fp3232_to_f32(data.increment),
2186 scroll_value: old_axis_state_with_valid_scroll_value.and_then(|state| state.scroll_value),
2187 }
2188}
2189
2190fn reset_all_pointer_device_scroll_positions(
2191 pointer_device_states: &mut BTreeMap<xinput::DeviceId, PointerDeviceState>,
2192) {
2193 pointer_device_states
2194 .iter_mut()
2195 .for_each(|(_, device_state)| reset_pointer_device_scroll_positions(device_state));
2196}
2197
2198fn reset_pointer_device_scroll_positions(pointer: &mut PointerDeviceState) {
2199 pointer.horizontal.scroll_value = None;
2200 pointer.vertical.scroll_value = None;
2201}
2202
2203/// Returns the scroll delta for a smooth scrolling motion event, or `None` if no scroll data is present.
2204fn get_scroll_delta_and_update_state(
2205 pointer: &mut PointerDeviceState,
2206 event: &xinput::MotionEvent,
2207) -> Option<Point<f32>> {
2208 let delta_x = get_axis_scroll_delta_and_update_state(event, &mut pointer.horizontal);
2209 let delta_y = get_axis_scroll_delta_and_update_state(event, &mut pointer.vertical);
2210 if delta_x.is_some() || delta_y.is_some() {
2211 Some(Point::new(delta_x.unwrap_or(0.0), delta_y.unwrap_or(0.0)))
2212 } else {
2213 None
2214 }
2215}
2216
2217fn get_axis_scroll_delta_and_update_state(
2218 event: &xinput::MotionEvent,
2219 axis: &mut ScrollAxisState,
2220) -> Option<f32> {
2221 let axis_index = get_valuator_axis_index(&event.valuator_mask, axis.valuator_number?)?;
2222 if let Some(axis_value) = event.axisvalues.get(axis_index) {
2223 let new_scroll = fp3232_to_f32(*axis_value);
2224 let delta_scroll = axis
2225 .scroll_value
2226 .map(|old_scroll| (old_scroll - new_scroll) * axis.multiplier);
2227 axis.scroll_value = Some(new_scroll);
2228 delta_scroll
2229 } else {
2230 log::error!("Encountered invalid XInput valuator_mask, scrolling may not work properly.");
2231 None
2232 }
2233}
2234
2235fn make_scroll_wheel_event(
2236 position: Point<Pixels>,
2237 scroll_delta: Point<f32>,
2238 modifiers: Modifiers,
2239) -> crate::ScrollWheelEvent {
2240 // When shift is held down, vertical scrolling turns into horizontal scrolling.
2241 let delta = if modifiers.shift {
2242 Point {
2243 x: scroll_delta.y,
2244 y: 0.0,
2245 }
2246 } else {
2247 scroll_delta
2248 };
2249 crate::ScrollWheelEvent {
2250 position,
2251 delta: ScrollDelta::Lines(delta),
2252 modifiers,
2253 touch_phase: TouchPhase::default(),
2254 }
2255}
2256
2257fn create_invisible_cursor(
2258 connection: &XCBConnection,
2259) -> anyhow::Result<crate::platform::linux::x11::client::xproto::Cursor> {
2260 let empty_pixmap = connection.generate_id()?;
2261 let root = connection.setup().roots[0].root;
2262 connection.create_pixmap(1, empty_pixmap, root, 1, 1)?;
2263
2264 let cursor = connection.generate_id()?;
2265 connection.create_cursor(cursor, empty_pixmap, empty_pixmap, 0, 0, 0, 0, 0, 0, 0, 0)?;
2266
2267 connection.free_pixmap(empty_pixmap)?;
2268
2269 xcb_flush(connection);
2270 Ok(cursor)
2271}
2272
2273enum DpiMode {
2274 Randr,
2275 Scale(f32),
2276 NotSet,
2277}
2278
2279fn get_scale_factor(
2280 connection: &XCBConnection,
2281 resource_database: &Database,
2282 screen_index: usize,
2283) -> f32 {
2284 let env_dpi = std::env::var(GPUI_X11_SCALE_FACTOR_ENV)
2285 .ok()
2286 .map(|var| {
2287 if var.to_lowercase() == "randr" {
2288 DpiMode::Randr
2289 } else if let Ok(scale) = var.parse::<f32>() {
2290 if valid_scale_factor(scale) {
2291 DpiMode::Scale(scale)
2292 } else {
2293 panic!(
2294 "`{}` must be a positive normal number or `randr`. Got `{}`",
2295 GPUI_X11_SCALE_FACTOR_ENV, var
2296 );
2297 }
2298 } else if var.is_empty() {
2299 DpiMode::NotSet
2300 } else {
2301 panic!(
2302 "`{}` must be a positive number or `randr`. Got `{}`",
2303 GPUI_X11_SCALE_FACTOR_ENV, var
2304 );
2305 }
2306 })
2307 .unwrap_or(DpiMode::NotSet);
2308
2309 match env_dpi {
2310 DpiMode::Scale(scale) => {
2311 log::info!(
2312 "Using scale factor from {}: {}",
2313 GPUI_X11_SCALE_FACTOR_ENV,
2314 scale
2315 );
2316 return scale;
2317 }
2318 DpiMode::Randr => {
2319 if let Some(scale) = get_randr_scale_factor(connection, screen_index) {
2320 log::info!(
2321 "Using RandR scale factor from {}=randr: {}",
2322 GPUI_X11_SCALE_FACTOR_ENV,
2323 scale
2324 );
2325 return scale;
2326 }
2327 log::warn!("Failed to calculate RandR scale factor, falling back to default");
2328 return 1.0;
2329 }
2330 DpiMode::NotSet => {}
2331 }
2332
2333 // TODO: Use scale factor from XSettings here
2334
2335 if let Some(dpi) = resource_database
2336 .get_value::<f32>("Xft.dpi", "Xft.dpi")
2337 .ok()
2338 .flatten()
2339 {
2340 let scale = dpi / 96.0; // base dpi
2341 log::info!("Using scale factor from Xft.dpi: {}", scale);
2342 return scale;
2343 }
2344
2345 if let Some(scale) = get_randr_scale_factor(connection, screen_index) {
2346 log::info!("Using RandR scale factor: {}", scale);
2347 return scale;
2348 }
2349
2350 log::info!("Using default scale factor: 1.0");
2351 1.0
2352}
2353
2354fn get_randr_scale_factor(connection: &XCBConnection, screen_index: usize) -> Option<f32> {
2355 let root = connection.setup().roots.get(screen_index)?.root;
2356
2357 let version_cookie = connection.randr_query_version(1, 6).ok()?;
2358 let version_reply = version_cookie.reply().ok()?;
2359 if version_reply.major_version < 1
2360 || (version_reply.major_version == 1 && version_reply.minor_version < 5)
2361 {
2362 return legacy_get_randr_scale_factor(connection, root); // for randr <1.5
2363 }
2364
2365 let monitors_cookie = connection.randr_get_monitors(root, true).ok()?; // true for active only
2366 let monitors_reply = monitors_cookie.reply().ok()?;
2367
2368 let mut fallback_scale: Option<f32> = None;
2369 for monitor in monitors_reply.monitors {
2370 if monitor.width_in_millimeters == 0 || monitor.height_in_millimeters == 0 {
2371 continue;
2372 }
2373 let scale_factor = get_dpi_factor(
2374 (monitor.width as u32, monitor.height as u32),
2375 (
2376 monitor.width_in_millimeters as u64,
2377 monitor.height_in_millimeters as u64,
2378 ),
2379 );
2380 if monitor.primary {
2381 return Some(scale_factor);
2382 } else if fallback_scale.is_none() {
2383 fallback_scale = Some(scale_factor);
2384 }
2385 }
2386
2387 fallback_scale
2388}
2389
2390fn legacy_get_randr_scale_factor(connection: &XCBConnection, root: u32) -> Option<f32> {
2391 let primary_cookie = connection.randr_get_output_primary(root).ok()?;
2392 let primary_reply = primary_cookie.reply().ok()?;
2393 let primary_output = primary_reply.output;
2394
2395 let primary_output_cookie = connection
2396 .randr_get_output_info(primary_output, x11rb::CURRENT_TIME)
2397 .ok()?;
2398 let primary_output_info = primary_output_cookie.reply().ok()?;
2399
2400 // try primary
2401 if primary_output_info.connection == randr::Connection::CONNECTED
2402 && primary_output_info.mm_width > 0
2403 && primary_output_info.mm_height > 0
2404 && primary_output_info.crtc != 0
2405 {
2406 let crtc_cookie = connection
2407 .randr_get_crtc_info(primary_output_info.crtc, x11rb::CURRENT_TIME)
2408 .ok()?;
2409 let crtc_info = crtc_cookie.reply().ok()?;
2410
2411 if crtc_info.width > 0 && crtc_info.height > 0 {
2412 let scale_factor = get_dpi_factor(
2413 (crtc_info.width as u32, crtc_info.height as u32),
2414 (
2415 primary_output_info.mm_width as u64,
2416 primary_output_info.mm_height as u64,
2417 ),
2418 );
2419 return Some(scale_factor);
2420 }
2421 }
2422
2423 // fallback: full scan
2424 let resources_cookie = connection.randr_get_screen_resources_current(root).ok()?;
2425 let screen_resources = resources_cookie.reply().ok()?;
2426
2427 let mut crtc_cookies = Vec::with_capacity(screen_resources.crtcs.len());
2428 for &crtc in &screen_resources.crtcs {
2429 if let Ok(cookie) = connection.randr_get_crtc_info(crtc, x11rb::CURRENT_TIME) {
2430 crtc_cookies.push((crtc, cookie));
2431 }
2432 }
2433
2434 let mut crtc_infos: HashMap<randr::Crtc, randr::GetCrtcInfoReply> = HashMap::default();
2435 let mut valid_outputs: HashSet<randr::Output> = HashSet::new();
2436 for (crtc, cookie) in crtc_cookies {
2437 if let Ok(reply) = cookie.reply() {
2438 if reply.width > 0 && reply.height > 0 && !reply.outputs.is_empty() {
2439 crtc_infos.insert(crtc, reply.clone());
2440 valid_outputs.extend(&reply.outputs);
2441 }
2442 }
2443 }
2444
2445 if valid_outputs.is_empty() {
2446 return None;
2447 }
2448
2449 let mut output_cookies = Vec::with_capacity(valid_outputs.len());
2450 for &output in &valid_outputs {
2451 if let Ok(cookie) = connection.randr_get_output_info(output, x11rb::CURRENT_TIME) {
2452 output_cookies.push((output, cookie));
2453 }
2454 }
2455 let mut output_infos: HashMap<randr::Output, randr::GetOutputInfoReply> = HashMap::default();
2456 for (output, cookie) in output_cookies {
2457 if let Ok(reply) = cookie.reply() {
2458 output_infos.insert(output, reply);
2459 }
2460 }
2461
2462 let mut fallback_scale: Option<f32> = None;
2463 for crtc_info in crtc_infos.values() {
2464 for &output in &crtc_info.outputs {
2465 if let Some(output_info) = output_infos.get(&output) {
2466 if output_info.connection != randr::Connection::CONNECTED {
2467 continue;
2468 }
2469
2470 if output_info.mm_width == 0 || output_info.mm_height == 0 {
2471 continue;
2472 }
2473
2474 let scale_factor = get_dpi_factor(
2475 (crtc_info.width as u32, crtc_info.height as u32),
2476 (output_info.mm_width as u64, output_info.mm_height as u64),
2477 );
2478
2479 if output != primary_output && fallback_scale.is_none() {
2480 fallback_scale = Some(scale_factor);
2481 }
2482 }
2483 }
2484 }
2485
2486 fallback_scale
2487}
2488
2489fn get_dpi_factor((width_px, height_px): (u32, u32), (width_mm, height_mm): (u64, u64)) -> f32 {
2490 let ppmm = ((width_px as f64 * height_px as f64) / (width_mm as f64 * height_mm as f64)).sqrt(); // pixels per mm
2491
2492 const MM_PER_INCH: f64 = 25.4;
2493 const BASE_DPI: f64 = 96.0;
2494 const QUANTIZE_STEP: f64 = 12.0; // e.g. 1.25 = 15/12, 1.5 = 18/12, 1.75 = 21/12, 2.0 = 24/12
2495 const MIN_SCALE: f64 = 1.0;
2496 const MAX_SCALE: f64 = 20.0;
2497
2498 let dpi_factor =
2499 ((ppmm * (QUANTIZE_STEP * MM_PER_INCH / BASE_DPI)).round() / QUANTIZE_STEP).max(MIN_SCALE);
2500
2501 let validated_factor = if dpi_factor <= MAX_SCALE {
2502 dpi_factor
2503 } else {
2504 MIN_SCALE
2505 };
2506
2507 if valid_scale_factor(validated_factor as f32) {
2508 validated_factor as f32
2509 } else {
2510 log::warn!(
2511 "Calculated DPI factor {} is invalid, using 1.0",
2512 validated_factor
2513 );
2514 1.0
2515 }
2516}
2517
2518#[inline]
2519fn valid_scale_factor(scale_factor: f32) -> bool {
2520 scale_factor.is_sign_positive() && scale_factor.is_normal()
2521}