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use std::{
cell::{Cell, RefCell},
collections::HashMap,
os::raw::{c_char, c_int, c_long, c_ulong},
rc::Rc,
slice,
sync::{Arc, Mutex},
};
use x11rb::x11_utils::Serialize;
use x11rb::{
protocol::{
xinput,
xproto::{self, ConnectionExt as _},
},
x11_utils::ExtensionInformation,
};
use super::{
atoms::*, ffi, get_xtarget, mkdid, mkwid, util, CookieResultExt, Device, DeviceId, DeviceInfo,
Dnd, DndState, GenericEventCookie, ImeReceiver, ScrollOrientation, UnownedWindow, WindowId,
};
use crate::{
dpi::{PhysicalPosition, PhysicalSize},
event::{DeviceEvent, ElementState, Event, Ime, RawKeyEvent, TouchPhase, WindowEvent},
event_loop::EventLoopWindowTarget as RootELW,
keyboard::ModifiersState,
platform_impl::platform::common::{keymap, xkb_state::KbdState},
};
use crate::{
event::InnerSizeWriter,
platform_impl::platform::x11::ime::{ImeEvent, ImeEventReceiver, ImeRequest},
};
/// The X11 documentation states: "Keycodes lie in the inclusive range `[8, 255]`".
const KEYCODE_OFFSET: u8 = 8;
pub(super) struct EventProcessor<T: 'static> {
pub(super) dnd: Dnd,
pub(super) ime_receiver: ImeReceiver,
pub(super) ime_event_receiver: ImeEventReceiver,
pub(super) randr_event_offset: u8,
pub(super) devices: RefCell<HashMap<DeviceId, Device>>,
pub(super) xi2ext: ExtensionInformation,
pub(super) xkbext: ExtensionInformation,
pub(super) target: Rc<RootELW<T>>,
pub(super) kb_state: KbdState,
// Number of touch events currently in progress
pub(super) num_touch: u32,
// This is the last pressed key that is repeatable (if it hasn't been
// released).
//
// Used to detect key repeats.
pub(super) held_key_press: Option<u32>,
pub(super) first_touch: Option<u64>,
// Currently focused window belonging to this process
pub(super) active_window: Option<xproto::Window>,
/// Latest modifiers we've sent for the user to trigger change in event.
pub(super) modifiers: Cell<ModifiersState>,
pub(super) is_composing: bool,
}
impl<T: 'static> EventProcessor<T> {
pub(super) fn init_device(&self, device: xinput::DeviceId) {
let wt = get_xtarget(&self.target);
let mut devices = self.devices.borrow_mut();
if let Some(info) = DeviceInfo::get(&wt.xconn, device as _) {
for info in info.iter() {
devices.insert(DeviceId(info.deviceid as _), Device::new(info));
}
}
}
pub(crate) fn with_window<F, Ret>(&self, window_id: xproto::Window, callback: F) -> Option<Ret>
where
F: Fn(&Arc<UnownedWindow>) -> Ret,
{
let mut deleted = false;
let window_id = WindowId(window_id as _);
let wt = get_xtarget(&self.target);
let result = wt
.windows
.borrow()
.get(&window_id)
.and_then(|window| {
let arc = window.upgrade();
deleted = arc.is_none();
arc
})
.map(|window| callback(&window));
if deleted {
// Garbage collection
wt.windows.borrow_mut().remove(&window_id);
}
result
}
fn window_exists(&self, window_id: xproto::Window) -> bool {
self.with_window(window_id, |_| ()).is_some()
}
pub(super) fn poll(&self) -> bool {
let wt = get_xtarget(&self.target);
let result = unsafe { (wt.xconn.xlib.XPending)(wt.xconn.display) };
result != 0
}
pub(super) unsafe fn poll_one_event(&mut self, event_ptr: *mut ffi::XEvent) -> bool {
let wt = get_xtarget(&self.target);
// This function is used to poll and remove a single event
// from the Xlib event queue in a non-blocking, atomic way.
// XCheckIfEvent is non-blocking and removes events from queue.
// XNextEvent can't be used because it blocks while holding the
// global Xlib mutex.
// XPeekEvent does not remove events from the queue.
unsafe extern "C" fn predicate(
_display: *mut ffi::Display,
_event: *mut ffi::XEvent,
_arg: *mut c_char,
) -> c_int {
// This predicate always returns "true" (1) to accept all events
1
}
let result = unsafe {
(wt.xconn.xlib.XCheckIfEvent)(
wt.xconn.display,
event_ptr,
Some(predicate),
std::ptr::null_mut(),
)
};
result != 0
}
pub(super) fn process_event<F>(&mut self, xev: &mut ffi::XEvent, mut callback: F)
where
F: FnMut(Event<T>),
{
let wt = get_xtarget(&self.target);
let atoms = wt.x_connection().atoms();
// XFilterEvent tells us when an event has been discarded by the input method.
// Specifically, this involves all of the KeyPress events in compose/pre-edit sequences,
// along with an extra copy of the KeyRelease events. This also prevents backspace and
// arrow keys from being detected twice.
if ffi::True
== unsafe {
(wt.xconn.xlib.XFilterEvent)(xev, {
let xev: &ffi::XAnyEvent = xev.as_ref();
xev.window
})
}
{
return;
}
let event_type = xev.get_type();
match event_type {
ffi::ClientMessage => {
let client_msg: &ffi::XClientMessageEvent = xev.as_ref();
let window = client_msg.window as xproto::Window;
let window_id = mkwid(window);
if client_msg.data.get_long(0) as xproto::Atom == wt.wm_delete_window {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::CloseRequested,
});
} else if client_msg.data.get_long(0) as xproto::Atom == wt.net_wm_ping {
let response_msg: &mut ffi::XClientMessageEvent = xev.as_mut();
let client_msg = xproto::ClientMessageEvent {
response_type: xproto::CLIENT_MESSAGE_EVENT,
format: response_msg.format as _,
sequence: response_msg.serial as _,
window: wt.root,
type_: response_msg.message_type as _,
data: xproto::ClientMessageData::from({
let [a, b, c, d, e]: [c_long; 5] =
response_msg.data.as_longs().try_into().unwrap();
[a as u32, b as u32, c as u32, d as u32, e as u32]
}),
};
wt.xconn
.xcb_connection()
.send_event(
false,
wt.root,
xproto::EventMask::SUBSTRUCTURE_NOTIFY
| xproto::EventMask::SUBSTRUCTURE_REDIRECT,
client_msg.serialize(),
)
.expect_then_ignore_error("Failed to send `ClientMessage` event.");
} else if client_msg.message_type == atoms[XdndEnter] as c_ulong {
let source_window = client_msg.data.get_long(0) as xproto::Window;
let flags = client_msg.data.get_long(1);
let version = flags >> 24;
self.dnd.version = Some(version);
let has_more_types = flags - (flags & (c_long::max_value() - 1)) == 1;
if !has_more_types {
let type_list = vec![
client_msg.data.get_long(2) as xproto::Atom,
client_msg.data.get_long(3) as xproto::Atom,
client_msg.data.get_long(4) as xproto::Atom,
];
self.dnd.type_list = Some(type_list);
} else if let Ok(more_types) = unsafe { self.dnd.get_type_list(source_window) }
{
self.dnd.type_list = Some(more_types);
}
} else if client_msg.message_type == atoms[XdndPosition] as c_ulong {
// This event occurs every time the mouse moves while a file's being dragged
// over our window. We emit HoveredFile in response; while the macOS backend
// does that upon a drag entering, XDND doesn't have access to the actual drop
// data until this event. For parity with other platforms, we only emit
// `HoveredFile` the first time, though if winit's API is later extended to
// supply position updates with `HoveredFile` or another event, implementing
// that here would be trivial.
let source_window = client_msg.data.get_long(0) as xproto::Window;
// Equivalent to `(x << shift) | y`
// where `shift = mem::size_of::<c_short>() * 8`
// Note that coordinates are in "desktop space", not "window space"
// (in X11 parlance, they're root window coordinates)
//let packed_coordinates = client_msg.data.get_long(2);
//let shift = mem::size_of::<libc::c_short>() * 8;
//let x = packed_coordinates >> shift;
//let y = packed_coordinates & !(x << shift);
// By our own state flow, `version` should never be `None` at this point.
let version = self.dnd.version.unwrap_or(5);
// Action is specified in versions 2 and up, though we don't need it anyway.
//let action = client_msg.data.get_long(4);
let accepted = if let Some(ref type_list) = self.dnd.type_list {
type_list.contains(&atoms[TextUriList])
} else {
false
};
if accepted {
self.dnd.source_window = Some(source_window);
unsafe {
if self.dnd.result.is_none() {
let time = if version >= 1 {
client_msg.data.get_long(3) as xproto::Timestamp
} else {
// In version 0, time isn't specified
x11rb::CURRENT_TIME
};
// Log this timestamp.
wt.xconn.set_timestamp(time);
// This results in the `SelectionNotify` event below
self.dnd.convert_selection(window, time);
}
self.dnd
.send_status(window, source_window, DndState::Accepted)
.expect("Failed to send `XdndStatus` message.");
}
} else {
unsafe {
self.dnd
.send_status(window, source_window, DndState::Rejected)
.expect("Failed to send `XdndStatus` message.");
}
self.dnd.reset();
}
} else if client_msg.message_type == atoms[XdndDrop] as c_ulong {
let (source_window, state) = if let Some(source_window) = self.dnd.source_window
{
if let Some(Ok(ref path_list)) = self.dnd.result {
for path in path_list {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::DroppedFile(path.clone()),
});
}
}
(source_window, DndState::Accepted)
} else {
// `source_window` won't be part of our DND state if we already rejected the drop in our
// `XdndPosition` handler.
let source_window = client_msg.data.get_long(0) as xproto::Window;
(source_window, DndState::Rejected)
};
unsafe {
self.dnd
.send_finished(window, source_window, state)
.expect("Failed to send `XdndFinished` message.");
}
self.dnd.reset();
} else if client_msg.message_type == atoms[XdndLeave] as c_ulong {
self.dnd.reset();
callback(Event::WindowEvent {
window_id,
event: WindowEvent::HoveredFileCancelled,
});
}
}
ffi::SelectionNotify => {
let xsel: &ffi::XSelectionEvent = xev.as_ref();
let window = xsel.requestor as xproto::Window;
let window_id = mkwid(window);
// Set the timestamp.
wt.xconn.set_timestamp(xsel.time as xproto::Timestamp);
if xsel.property == atoms[XdndSelection] as c_ulong {
let mut result = None;
// This is where we receive data from drag and drop
if let Ok(mut data) = unsafe { self.dnd.read_data(window) } {
let parse_result = self.dnd.parse_data(&mut data);
if let Ok(ref path_list) = parse_result {
for path in path_list {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::HoveredFile(path.clone()),
});
}
}
result = Some(parse_result);
}
self.dnd.result = result;
}
}
ffi::ConfigureNotify => {
let xev: &ffi::XConfigureEvent = xev.as_ref();
let xwindow = xev.window as xproto::Window;
let window_id = mkwid(xwindow);
if let Some(window) = self.with_window(xwindow, Arc::clone) {
// So apparently...
// `XSendEvent` (synthetic `ConfigureNotify`) -> position relative to root
// `XConfigureNotify` (real `ConfigureNotify`) -> position relative to parent
// https://tronche.com/gui/x/icccm/sec-4.html#s-4.1.5
// We don't want to send `Moved` when this is false, since then every `Resized`
// (whether the window moved or not) is accompanied by an extraneous `Moved` event
// that has a position relative to the parent window.
let is_synthetic = xev.send_event == ffi::True;
// These are both in physical space.
let new_inner_size = (xev.width as u32, xev.height as u32);
let new_inner_position = (xev.x, xev.y);
let (mut resized, moved) = {
let mut shared_state_lock = window.shared_state_lock();
let resized =
util::maybe_change(&mut shared_state_lock.size, new_inner_size);
let moved = if is_synthetic {
util::maybe_change(
&mut shared_state_lock.inner_position,
new_inner_position,
)
} else {
// Detect when frame extents change.
// Since this isn't synthetic, as per the notes above, this position is relative to the
// parent window.
let rel_parent = new_inner_position;
if util::maybe_change(
&mut shared_state_lock.inner_position_rel_parent,
rel_parent,
) {
// This ensures we process the next `Moved`.
shared_state_lock.inner_position = None;
// Extra insurance against stale frame extents.
shared_state_lock.frame_extents = None;
}
false
};
(resized, moved)
};
let position = window.shared_state_lock().position;
let new_outer_position = if let (Some(position), false) = (position, moved) {
position
} else {
let mut shared_state_lock = window.shared_state_lock();
// We need to convert client area position to window position.
let frame_extents = shared_state_lock
.frame_extents
.as_ref()
.cloned()
.unwrap_or_else(|| {
let frame_extents =
wt.xconn.get_frame_extents_heuristic(xwindow, wt.root);
shared_state_lock.frame_extents = Some(frame_extents.clone());
frame_extents
});
let outer = frame_extents
.inner_pos_to_outer(new_inner_position.0, new_inner_position.1);
shared_state_lock.position = Some(outer);
// Unlock shared state to prevent deadlock in callback below
drop(shared_state_lock);
if moved {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Moved(outer.into()),
});
}
outer
};
if is_synthetic {
let mut shared_state_lock = window.shared_state_lock();
// If we don't use the existing adjusted value when available, then the user can screw up the
// resizing by dragging across monitors *without* dropping the window.
let (width, height) = shared_state_lock
.dpi_adjusted
.unwrap_or((xev.width as u32, xev.height as u32));
let last_scale_factor = shared_state_lock.last_monitor.scale_factor;
let new_scale_factor = {
let window_rect = util::AaRect::new(new_outer_position, new_inner_size);
let monitor = wt
.xconn
.get_monitor_for_window(Some(window_rect))
.expect("Failed to find monitor for window");
if monitor.is_dummy() {
// Avoid updating monitor using a dummy monitor handle
last_scale_factor
} else {
shared_state_lock.last_monitor = monitor.clone();
monitor.scale_factor
}
};
if last_scale_factor != new_scale_factor {
let (new_width, new_height) = window.adjust_for_dpi(
last_scale_factor,
new_scale_factor,
width,
height,
&shared_state_lock,
);
let old_inner_size = PhysicalSize::new(width, height);
let new_inner_size = PhysicalSize::new(new_width, new_height);
// Unlock shared state to prevent deadlock in callback below
drop(shared_state_lock);
let inner_size = Arc::new(Mutex::new(new_inner_size));
callback(Event::WindowEvent {
window_id,
event: WindowEvent::ScaleFactorChanged {
scale_factor: new_scale_factor,
inner_size_writer: InnerSizeWriter::new(Arc::downgrade(
&inner_size,
)),
},
});
let new_inner_size = *inner_size.lock().unwrap();
drop(inner_size);
if new_inner_size != old_inner_size {
window.request_inner_size_physical(
new_inner_size.width,
new_inner_size.height,
);
window.shared_state_lock().dpi_adjusted =
Some(new_inner_size.into());
// if the DPI factor changed, force a resize event to ensure the logical
// size is computed with the right DPI factor
resized = true;
}
}
}
let mut shared_state_lock = window.shared_state_lock();
let hittest = shared_state_lock.cursor_hittest;
// This is a hack to ensure that the DPI adjusted resize is actually applied on all WMs. KWin
// doesn't need this, but Xfwm does. The hack should not be run on other WMs, since tiling
// WMs constrain the window size, making the resize fail. This would cause an endless stream of
// XResizeWindow requests, making Xorg, the winit client, and the WM consume 100% of CPU.
if let Some(adjusted_size) = shared_state_lock.dpi_adjusted {
if new_inner_size == adjusted_size || !util::wm_name_is_one_of(&["Xfwm4"]) {
// When this finally happens, the event will not be synthetic.
shared_state_lock.dpi_adjusted = None;
} else {
window.request_inner_size_physical(adjusted_size.0, adjusted_size.1);
}
}
// Unlock shared state to prevent deadlock in callback below
drop(shared_state_lock);
// Reload hittest.
if hittest.unwrap_or(false) {
let _ = window.set_cursor_hittest(true);
}
if resized {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Resized(new_inner_size.into()),
});
}
}
}
ffi::ReparentNotify => {
let xev: &ffi::XReparentEvent = xev.as_ref();
// This is generally a reliable way to detect when the window manager's been
// replaced, though this event is only fired by reparenting window managers
// (which is almost all of them). Failing to correctly update WM info doesn't
// really have much impact, since on the WMs affected (xmonad, dwm, etc.) the only
// effect is that we waste some time trying to query unsupported properties.
wt.xconn.update_cached_wm_info(wt.root);
self.with_window(xev.window as xproto::Window, |window| {
window.invalidate_cached_frame_extents();
});
}
ffi::MapNotify => {
let xev: &ffi::XMapEvent = xev.as_ref();
let window = xev.window as xproto::Window;
let window_id = mkwid(window);
// XXX re-issue the focus state when mapping the window.
//
// The purpose of it is to deliver initial focused state of the newly created
// window, given that we can't rely on `CreateNotify`, due to it being not
// sent.
let focus = self
.with_window(window, |window| window.has_focus())
.unwrap_or_default();
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Focused(focus),
});
}
ffi::DestroyNotify => {
let xev: &ffi::XDestroyWindowEvent = xev.as_ref();
let window = xev.window as xproto::Window;
let window_id = mkwid(window);
// In the event that the window's been destroyed without being dropped first, we
// cleanup again here.
wt.windows.borrow_mut().remove(&WindowId(window as _));
// Since all XIM stuff needs to happen from the same thread, we destroy the input
// context here instead of when dropping the window.
wt.ime
.borrow_mut()
.remove_context(window as ffi::Window)
.expect("Failed to destroy input context");
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Destroyed,
});
}
ffi::PropertyNotify => {
let xev: &ffi::XPropertyEvent = xev.as_ref();
let atom = xev.atom as xproto::Atom;
if atom == xproto::Atom::from(xproto::AtomEnum::RESOURCE_MANAGER) {
self.process_dpi_change(&mut callback);
}
}
ffi::VisibilityNotify => {
let xev: &ffi::XVisibilityEvent = xev.as_ref();
let xwindow = xev.window as xproto::Window;
callback(Event::WindowEvent {
window_id: mkwid(xwindow),
event: WindowEvent::Occluded(xev.state == ffi::VisibilityFullyObscured),
});
self.with_window(xwindow, |window| {
window.visibility_notify();
});
}
ffi::Expose => {
let xev: &ffi::XExposeEvent = xev.as_ref();
// Multiple Expose events may be received for subareas of a window.
// We issue `RedrawRequested` only for the last event of such a series.
if xev.count == 0 {
let window = xev.window as xproto::Window;
let window_id = mkwid(window);
callback(Event::WindowEvent {
window_id,
event: WindowEvent::RedrawRequested,
});
}
}
// Note that in compose/pre-edit sequences, we'll always receive KeyRelease events
ty @ ffi::KeyPress | ty @ ffi::KeyRelease => {
let xkev: &mut ffi::XKeyEvent = xev.as_mut();
// Set the timestamp.
wt.xconn.set_timestamp(xkev.time as xproto::Timestamp);
let window = match self.active_window {
Some(window) => window,
None => return,
};
let window_id = mkwid(window);
let device_id = mkdid(util::VIRTUAL_CORE_KEYBOARD);
let keycode = xkev.keycode as _;
// Update state to track key repeats and determine whether this key was a repeat.
//
// Note, when a key is held before focusing on this window the first
// (non-synthetic) event will not be flagged as a repeat (also note that the
// synthetic press event that is generated before this when the window gains focus
// will also not be flagged as a repeat).
//
// Only keys that can repeat should change the held_key_press state since a
// continuously held repeatable key may continue repeating after the press of a
// non-repeatable key.
let repeat = if self.kb_state.key_repeats(keycode) {
let is_latest_held = self.held_key_press == Some(keycode);
if ty == ffi::KeyPress {
self.held_key_press = Some(keycode);
is_latest_held
} else {
// Check that the released key is the latest repeatable key that has been
// pressed, since repeats will continue for the latest key press if a
// different previously pressed key is released.
if is_latest_held {
self.held_key_press = None;
}
false
}
} else {
false
};
let state = if ty == ffi::KeyPress {
ElementState::Pressed
} else {
ElementState::Released
};
if keycode != 0 && !self.is_composing {
let event = self.kb_state.process_key_event(keycode, state, repeat);
callback(Event::WindowEvent {
window_id,
event: WindowEvent::KeyboardInput {
device_id,
event,
is_synthetic: false,
},
});
} else if let Some(ic) = wt.ime.borrow().get_context(window as ffi::Window) {
let written = wt.xconn.lookup_utf8(ic, xkev);
if !written.is_empty() {
let event = Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Preedit(String::new(), None)),
};
callback(event);
let event = Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Commit(written)),
};
self.is_composing = false;
callback(event);
}
}
}
ffi::GenericEvent => {
let guard = if let Some(e) = GenericEventCookie::from_event(&wt.xconn, *xev) {
e
} else {
return;
};
let xev = &guard.cookie;
if self.xi2ext.major_opcode != xev.extension as u8 {
return;
}
use crate::event::{
ElementState::{Pressed, Released},
MouseButton::{Back, Forward, Left, Middle, Other, Right},
MouseScrollDelta::LineDelta,
Touch,
WindowEvent::{
AxisMotion, CursorEntered, CursorLeft, CursorMoved, Focused, MouseInput,
MouseWheel,
},
};
match xev.evtype {
ffi::XI_ButtonPress | ffi::XI_ButtonRelease => {
let xev: &ffi::XIDeviceEvent = unsafe { &*(xev.data as *const _) };
let window_id = mkwid(xev.event as xproto::Window);
let device_id = mkdid(xev.deviceid as xinput::DeviceId);
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
if (xev.flags & ffi::XIPointerEmulated) != 0 {
// Deliver multi-touch events instead of emulated mouse events.
return;
}
let state = if xev.evtype == ffi::XI_ButtonPress {
Pressed
} else {
Released
};
match xev.detail as u32 {
ffi::Button1 => callback(Event::WindowEvent {
window_id,
event: MouseInput {
device_id,
state,
button: Left,
},
}),
ffi::Button2 => callback(Event::WindowEvent {
window_id,
event: MouseInput {
device_id,
state,
button: Middle,
},
}),
ffi::Button3 => callback(Event::WindowEvent {
window_id,
event: MouseInput {
device_id,
state,
button: Right,
},
}),
// Suppress emulated scroll wheel clicks, since we handle the real motion events for those.
// In practice, even clicky scroll wheels appear to be reported by evdev (and XInput2 in
// turn) as axis motion, so we don't otherwise special-case these button presses.
4..=7 => {
if xev.flags & ffi::XIPointerEmulated == 0 {
callback(Event::WindowEvent {
window_id,
event: MouseWheel {
device_id,
delta: match xev.detail {
4 => LineDelta(0.0, 1.0),
5 => LineDelta(0.0, -1.0),
6 => LineDelta(1.0, 0.0),
7 => LineDelta(-1.0, 0.0),
_ => unreachable!(),
},
phase: TouchPhase::Moved,
},
});
}
}
8 => callback(Event::WindowEvent {
window_id,
event: MouseInput {
device_id,
state,
button: Back,
},
}),
9 => callback(Event::WindowEvent {
window_id,
event: MouseInput {
device_id,
state,
button: Forward,
},
}),
x => callback(Event::WindowEvent {
window_id,
event: MouseInput {
device_id,
state,
button: Other(x as u16),
},
}),
}
}
ffi::XI_Motion => {
let xev: &ffi::XIDeviceEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
let device_id = mkdid(xev.deviceid as xinput::DeviceId);
let window = xev.event as xproto::Window;
let window_id = mkwid(window);
let new_cursor_pos = (xev.event_x, xev.event_y);
let cursor_moved = self.with_window(window, |window| {
let mut shared_state_lock = window.shared_state_lock();
util::maybe_change(&mut shared_state_lock.cursor_pos, new_cursor_pos)
});
if cursor_moved == Some(true) {
let position = PhysicalPosition::new(xev.event_x, xev.event_y);
callback(Event::WindowEvent {
window_id,
event: CursorMoved {
device_id,
position,
},
});
} else if cursor_moved.is_none() {
return;
}
// More gymnastics, for self.devices
let mut events = Vec::new();
{
let mask = unsafe {
slice::from_raw_parts(
xev.valuators.mask,
xev.valuators.mask_len as usize,
)
};
let mut devices = self.devices.borrow_mut();
let physical_device = match devices
.get_mut(&DeviceId(xev.sourceid as xinput::DeviceId))
{
Some(device) => device,
None => return,
};
let mut value = xev.valuators.values;
for i in 0..xev.valuators.mask_len * 8 {
if ffi::XIMaskIsSet(mask, i) {
let x = unsafe { *value };
if let Some(&mut (_, ref mut info)) = physical_device
.scroll_axes
.iter_mut()
.find(|&&mut (axis, _)| axis == i as _)
{
let delta = (x - info.position) / info.increment;
info.position = x;
events.push(Event::WindowEvent {
window_id,
event: MouseWheel {
device_id,
delta: match info.orientation {
// X11 vertical scroll coordinates are opposite to winit's
ScrollOrientation::Horizontal => {
LineDelta(-delta as f32, 0.0)
}
ScrollOrientation::Vertical => {
LineDelta(0.0, -delta as f32)
}
},
phase: TouchPhase::Moved,
},
});
} else {
events.push(Event::WindowEvent {
window_id,
event: AxisMotion {
device_id,
axis: i as u32,
value: unsafe { *value },
},
});
}
value = unsafe { value.offset(1) };
}
}
}
for event in events {
callback(event);
}
}
ffi::XI_Enter => {
let xev: &ffi::XIEnterEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
let window = xev.event as xproto::Window;
let window_id = mkwid(window);
let device_id = mkdid(xev.deviceid as xinput::DeviceId);
if let Some(all_info) =
DeviceInfo::get(&wt.xconn, super::ALL_DEVICES.into())
{
let mut devices = self.devices.borrow_mut();
for device_info in all_info.iter() {
if device_info.deviceid == xev.sourceid
// This is needed for resetting to work correctly on i3, and
// presumably some other WMs. On those, `XI_Enter` doesn't include
// the physical device ID, so both `sourceid` and `deviceid` are
// the virtual device.
|| device_info.attachment == xev.sourceid
{
let device_id = DeviceId(device_info.deviceid as _);
if let Some(device) = devices.get_mut(&device_id) {
device.reset_scroll_position(device_info);
}
}
}
}
if self.window_exists(window) {
callback(Event::WindowEvent {
window_id,
event: CursorEntered { device_id },
});
let position = PhysicalPosition::new(xev.event_x, xev.event_y);
callback(Event::WindowEvent {
window_id,
event: CursorMoved {
device_id,
position,
},
});
}
}
ffi::XI_Leave => {
let xev: &ffi::XILeaveEvent = unsafe { &*(xev.data as *const _) };
let window = xev.event as xproto::Window;
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
// Leave, FocusIn, and FocusOut can be received by a window that's already
// been destroyed, which the user presumably doesn't want to deal with.
let window_closed = !self.window_exists(window);
if !window_closed {
callback(Event::WindowEvent {
window_id: mkwid(window),
event: CursorLeft {
device_id: mkdid(xev.deviceid as xinput::DeviceId),
},
});
}
}
ffi::XI_FocusIn => {
let xev: &ffi::XIFocusInEvent = unsafe { &*(xev.data as *const _) };
let window = xev.event as xproto::Window;
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
wt.ime
.borrow_mut()
.focus(xev.event)
.expect("Failed to focus input context");
if self.active_window != Some(window) {
self.active_window = Some(window);
wt.update_listen_device_events(true);
let window_id = mkwid(window);
let position = PhysicalPosition::new(xev.event_x, xev.event_y);
if let Some(window) = self.with_window(window, Arc::clone) {
window.shared_state_lock().has_focus = true;
}
callback(Event::WindowEvent {
window_id,
event: Focused(true),
});
let modifiers: crate::keyboard::ModifiersState =
self.kb_state.mods_state().into();
self.send_modifiers(modifiers, &mut callback);
// The deviceid for this event is for a keyboard instead of a pointer,
// so we have to do a little extra work.
let pointer_id = self
.devices
.borrow()
.get(&DeviceId(xev.deviceid as xinput::DeviceId))
.map(|device| device.attachment)
.unwrap_or(2);
callback(Event::WindowEvent {
window_id,
event: CursorMoved {
device_id: mkdid(pointer_id as _),
position,
},
});
// Issue key press events for all pressed keys
Self::handle_pressed_keys(
wt,
window_id,
ElementState::Pressed,
&mut self.kb_state,
&mut callback,
);
}
}
ffi::XI_FocusOut => {
let xev: &ffi::XIFocusOutEvent = unsafe { &*(xev.data as *const _) };
let window = xev.event as xproto::Window;
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
if !self.window_exists(window) {
return;
}
wt.ime
.borrow_mut()
.unfocus(xev.event)
.expect("Failed to unfocus input context");
if self.active_window.take() == Some(window) {
let window_id = mkwid(window);
wt.update_listen_device_events(false);
// Issue key release events for all pressed keys
Self::handle_pressed_keys(
wt,
window_id,
ElementState::Released,
&mut self.kb_state,
&mut callback,
);
// Clear this so detecting key repeats is consistently handled when the
// window regains focus.
self.held_key_press = None;
self.send_modifiers(ModifiersState::empty(), &mut callback);
if let Some(window) = self.with_window(window, Arc::clone) {
window.shared_state_lock().has_focus = false;
}
callback(Event::WindowEvent {
window_id,
event: Focused(false),
})
}
}
ffi::XI_TouchBegin | ffi::XI_TouchUpdate | ffi::XI_TouchEnd => {
let xev: &ffi::XIDeviceEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
let window = xev.event as xproto::Window;
let window_id = mkwid(window);
let phase = match xev.evtype {
ffi::XI_TouchBegin => TouchPhase::Started,
ffi::XI_TouchUpdate => TouchPhase::Moved,
ffi::XI_TouchEnd => TouchPhase::Ended,
_ => unreachable!(),
};
if self.window_exists(window) {
let id = xev.detail as u64;
let location = PhysicalPosition::new(xev.event_x, xev.event_y);
// Mouse cursor position changes when touch events are received.
// Only the first concurrently active touch ID moves the mouse cursor.
if is_first_touch(&mut self.first_touch, &mut self.num_touch, id, phase)
{
callback(Event::WindowEvent {
window_id,
event: WindowEvent::CursorMoved {
device_id: mkdid(util::VIRTUAL_CORE_POINTER),
position: location.cast(),
},
});
}
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Touch(Touch {
device_id: mkdid(xev.deviceid as xinput::DeviceId),
phase,
location,
force: None, // TODO
id,
}),
})
}
}
ffi::XI_RawButtonPress | ffi::XI_RawButtonRelease => {
let xev: &ffi::XIRawEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
if xev.flags & ffi::XIPointerEmulated == 0 {
callback(Event::DeviceEvent {
device_id: mkdid(xev.deviceid as xinput::DeviceId),
event: DeviceEvent::Button {
button: xev.detail as u32,
state: match xev.evtype {
ffi::XI_RawButtonPress => Pressed,
ffi::XI_RawButtonRelease => Released,
_ => unreachable!(),
},
},
});
}
}
ffi::XI_RawMotion => {
let xev: &ffi::XIRawEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
let did = mkdid(xev.deviceid as xinput::DeviceId);
let mask = unsafe {
slice::from_raw_parts(
xev.valuators.mask,
xev.valuators.mask_len as usize,
)
};
let mut value = xev.raw_values;
let mut mouse_delta = (0.0, 0.0);
let mut scroll_delta = (0.0, 0.0);
for i in 0..xev.valuators.mask_len * 8 {
if ffi::XIMaskIsSet(mask, i) {
let x = unsafe { *value };
// We assume that every XInput2 device with analog axes is a pointing device emitting
// relative coordinates.
match i {
0 => mouse_delta.0 = x,
1 => mouse_delta.1 = x,
2 => scroll_delta.0 = x as f32,
3 => scroll_delta.1 = x as f32,
_ => {}
}
callback(Event::DeviceEvent {
device_id: did,
event: DeviceEvent::Motion {
axis: i as u32,
value: x,
},
});
value = unsafe { value.offset(1) };
}
}
if mouse_delta != (0.0, 0.0) {
callback(Event::DeviceEvent {
device_id: did,
event: DeviceEvent::MouseMotion { delta: mouse_delta },
});
}
if scroll_delta != (0.0, 0.0) {
callback(Event::DeviceEvent {
device_id: did,
event: DeviceEvent::MouseWheel {
delta: LineDelta(scroll_delta.0, scroll_delta.1),
},
});
}
}
ffi::XI_RawKeyPress | ffi::XI_RawKeyRelease => {
let xev: &ffi::XIRawEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
let state = match xev.evtype {
ffi::XI_RawKeyPress => Pressed,
ffi::XI_RawKeyRelease => Released,
_ => unreachable!(),
};
let device_id = mkdid(xev.sourceid as xinput::DeviceId);
let keycode = xev.detail as u32;
if keycode < KEYCODE_OFFSET as u32 {
return;
}
let physical_key = keymap::raw_keycode_to_physicalkey(keycode);
callback(Event::DeviceEvent {
device_id,
event: DeviceEvent::Key(RawKeyEvent {
physical_key,
state,
}),
});
}
ffi::XI_HierarchyChanged => {
let xev: &ffi::XIHierarchyEvent = unsafe { &*(xev.data as *const _) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
for info in
unsafe { slice::from_raw_parts(xev.info, xev.num_info as usize) }
{
if 0 != info.flags & (ffi::XISlaveAdded | ffi::XIMasterAdded) {
self.init_device(info.deviceid as xinput::DeviceId);
callback(Event::DeviceEvent {
device_id: mkdid(info.deviceid as xinput::DeviceId),
event: DeviceEvent::Added,
});
} else if 0 != info.flags & (ffi::XISlaveRemoved | ffi::XIMasterRemoved)
{
callback(Event::DeviceEvent {
device_id: mkdid(info.deviceid as xinput::DeviceId),
event: DeviceEvent::Removed,
});
let mut devices = self.devices.borrow_mut();
devices.remove(&DeviceId(info.deviceid as xinput::DeviceId));
}
}
}
_ => {}
}
}
_ => {
if event_type == self.xkbext.first_event as _ {
let xev = unsafe { &*(xev as *const _ as *const ffi::XkbAnyEvent) };
match xev.xkb_type {
ffi::XkbNewKeyboardNotify => {
let xev = unsafe {
&*(xev as *const _ as *const ffi::XkbNewKeyboardNotifyEvent)
};
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
let keycodes_changed_flag = 0x1;
let geometry_changed_flag = 0x1 << 1;
let keycodes_changed =
util::has_flag(xev.changed, keycodes_changed_flag);
let geometry_changed =
util::has_flag(xev.changed, geometry_changed_flag);
if xev.device == self.kb_state.core_keyboard_id
&& (keycodes_changed || geometry_changed)
{
unsafe { self.kb_state.init_with_x11_keymap() };
let modifiers = self.kb_state.mods_state();
self.send_modifiers(modifiers.into(), &mut callback);
}
}
ffi::XkbMapNotify => {
unsafe { self.kb_state.init_with_x11_keymap() };
self.send_modifiers(self.kb_state.mods_state().into(), &mut callback);
}
ffi::XkbStateNotify => {
let xev =
unsafe { &*(xev as *const _ as *const ffi::XkbStateNotifyEvent) };
// Set the timestamp.
wt.xconn.set_timestamp(xev.time as xproto::Timestamp);
// NOTE: Modifiers could update without a prior event updating them,
// thus diffing the state before and after is not reliable.
self.kb_state.update_modifiers(
xev.base_mods,
xev.latched_mods,
xev.locked_mods,
xev.base_group as u32,
xev.latched_group as u32,
xev.locked_group as u32,
);
self.send_modifiers(self.kb_state.mods_state().into(), &mut callback);
}
_ => {}
}
}
if event_type == self.randr_event_offset as c_int {
self.process_dpi_change(&mut callback);
}
}
}
// Handle IME requests.
while let Ok(request) = self.ime_receiver.try_recv() {
let mut ime = wt.ime.borrow_mut();
match request {
ImeRequest::Position(window_id, x, y) => {
ime.send_xim_spot(window_id, x, y);
}
ImeRequest::Allow(window_id, allowed) => {
ime.set_ime_allowed(window_id, allowed);
}
}
}
// Drain IME events.
while let Ok((window, event)) = self.ime_event_receiver.try_recv() {
let window_id = mkwid(window as xproto::Window);
match event {
ImeEvent::Enabled => {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Enabled),
});
}
ImeEvent::Start => {
self.is_composing = true;
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Preedit("".to_owned(), None)),
});
}
ImeEvent::Update(text, position) => {
if self.is_composing {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Preedit(text, Some((position, position)))),
});
}
}
ImeEvent::End => {
self.is_composing = false;
// Issue empty preedit on `Done`.
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Preedit(String::new(), None)),
});
}
ImeEvent::Disabled => {
self.is_composing = false;
callback(Event::WindowEvent {
window_id,
event: WindowEvent::Ime(Ime::Disabled),
});
}
}
}
}
/// Send modifiers for the active window.
///
/// The event won't be send when the `modifiers` match the previosly `sent` modifiers value.
fn send_modifiers<F: FnMut(Event<T>)>(&self, modifiers: ModifiersState, callback: &mut F) {
let window_id = match self.active_window {
Some(window) => mkwid(window),
None => return,
};
if self.modifiers.replace(modifiers) != modifiers {
callback(Event::WindowEvent {
window_id,
event: WindowEvent::ModifiersChanged(self.modifiers.get().into()),
});
}
}
fn handle_pressed_keys<F>(
wt: &super::EventLoopWindowTarget<T>,
window_id: crate::window::WindowId,
state: ElementState,
kb_state: &mut KbdState,
callback: &mut F,
) where
F: FnMut(Event<T>),
{
let device_id = mkdid(util::VIRTUAL_CORE_KEYBOARD);
// Update modifiers state and emit key events based on which keys are currently pressed.
for keycode in wt
.xconn
.query_keymap()
.into_iter()
.filter(|k| *k >= KEYCODE_OFFSET)
{
let keycode = keycode as u32;
let event = kb_state.process_key_event(keycode, state, false);
callback(Event::WindowEvent {
window_id,
event: WindowEvent::KeyboardInput {
device_id,
event,
is_synthetic: true,
},
});
}
}
fn process_dpi_change<F>(&self, callback: &mut F)
where
F: FnMut(Event<T>),
{
let wt = get_xtarget(&self.target);
wt.xconn
.reload_database()
.expect("failed to reload Xft database");
// In the future, it would be quite easy to emit monitor hotplug events.
let prev_list = {
let prev_list = wt.xconn.invalidate_cached_monitor_list();
match prev_list {
Some(prev_list) => prev_list,
None => return,
}
};
let new_list = wt
.xconn
.available_monitors()
.expect("Failed to get monitor list");
for new_monitor in new_list {
// Previous list may be empty, in case of disconnecting and
// reconnecting the only one monitor. We still need to emit events in
// this case.
let maybe_prev_scale_factor = prev_list
.iter()
.find(|prev_monitor| prev_monitor.name == new_monitor.name)
.map(|prev_monitor| prev_monitor.scale_factor);
if Some(new_monitor.scale_factor) != maybe_prev_scale_factor {
for window in wt.windows.borrow().iter().filter_map(|(_, w)| w.upgrade()) {
window.refresh_dpi_for_monitor(
&new_monitor,
maybe_prev_scale_factor,
&mut *callback,
)
}
}
}
}
}
fn is_first_touch(first: &mut Option<u64>, num: &mut u32, id: u64, phase: TouchPhase) -> bool {
match phase {
TouchPhase::Started => {
if *num == 0 {
*first = Some(id);
}
*num += 1;
}
TouchPhase::Cancelled | TouchPhase::Ended => {
if *first == Some(id) {
*first = None;
}
*num = num.saturating_sub(1);
}
_ => (),
}
*first == Some(id)
}