linux: Various X11 scroll improvements (#18484)
Closes #14089, #14416, #15970, #17230, #18485 Release Notes: - Fixed some cases where Linux X11 mouse scrolling doesn't work at all (#14089, ##15970, #17230) - Fixed handling of switching between Linux X11 devices used for scrolling (#14416, #18485) Change details: Also includes the commit from PR #18317 so I don't have to deal with merge conflicts. * Now uses valuator info from slave pointers rather than master. This hopefully fixes remaining cases where scrolling is fully broken. https://github.com/zed-industries/zed/issues/14089, https://github.com/zed-industries/zed/issues/15970, https://github.com/zed-industries/zed/issues/17230 * Per-device recording of "last scroll position" used to calculate deltas. This meant that swithing scroll devices would cause a sudden jump of scroll position, often to the beginning or end of the file (https://github.com/zed-industries/zed/issues/14416). * Re-queries device metadata when devices change, so that newly plugged in devices will work, and re-use of device-ids don't use old metadata with a new device. * xinput 2 documentation describes support for multiple master devices. I believe this implementation will support that, since now it just uses `DeviceInfo` from slave devices. The concept of master devices is only used in registering for events. * Uses popcount+bit masking to resolve axis indexes, instead of iterating bit indices. --------- Co-authored-by: Thorsten Ball <mrnugget@gmail.com>
This commit is contained in:
Michael Sloan
GitHub
parent
72be8c5d14
commit
527c9097f8
5 changed files with 407 additions and 142 deletions
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@ -1,6 +1,6 @@
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use core::str;
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use std::cell::RefCell;
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use std::collections::HashSet;
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use std::collections::{BTreeMap, HashSet};
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use std::ops::Deref;
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use std::path::PathBuf;
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use std::rc::{Rc, Weak};
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@ -42,7 +42,10 @@ use crate::{
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WindowParams, X11Window,
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};
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use super::{button_of_key, modifiers_from_state, pressed_button_from_mask};
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use super::{
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button_or_scroll_from_event_detail, get_valuator_axis_index, modifiers_from_state,
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pressed_button_from_mask, ButtonOrScroll, ScrollDirection,
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};
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use super::{X11Display, X11WindowStatePtr, XcbAtoms};
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use super::{XimCallbackEvent, XimHandler};
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use crate::platform::linux::platform::{DOUBLE_CLICK_INTERVAL, SCROLL_LINES};
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@ -51,7 +54,15 @@ use crate::platform::linux::{
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get_xkb_compose_state, is_within_click_distance, open_uri_internal, reveal_path_internal,
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};
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pub(super) const XINPUT_MASTER_DEVICE: u16 = 1;
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/// Value for DeviceId parameters which selects all devices.
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pub(crate) const XINPUT_ALL_DEVICES: xinput::DeviceId = 0;
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/// Value for DeviceId parameters which selects all device groups. Events that
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/// occur within the group are emitted by the group itself.
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///
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/// In XInput 2's interface, these are referred to as "master devices", but that
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/// terminology is both archaic and unclear.
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pub(crate) const XINPUT_ALL_DEVICE_GROUPS: xinput::DeviceId = 1;
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pub(crate) struct WindowRef {
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window: X11WindowStatePtr,
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@ -117,6 +128,26 @@ pub struct Xdnd {
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position: Point<Pixels>,
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}
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#[derive(Debug)]
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struct PointerDeviceState {
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horizontal: ScrollAxisState,
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vertical: ScrollAxisState,
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}
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#[derive(Debug, Default)]
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struct ScrollAxisState {
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/// Valuator number for looking up this axis's scroll value.
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valuator_number: Option<u16>,
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/// Conversion factor from scroll units to lines.
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multiplier: f32,
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/// Last scroll value for calculating scroll delta.
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///
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/// This gets set to `None` whenever it might be invalid - when devices change or when window focus changes.
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/// The logic errs on the side of invalidating this, since the consequence is just skipping the delta of one scroll event.
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/// The consequence of not invalidating it can be large invalid deltas, which are much more user visible.
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scroll_value: Option<f32>,
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}
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pub struct X11ClientState {
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pub(crate) loop_handle: LoopHandle<'static, X11Client>,
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pub(crate) event_loop: Option<calloop::EventLoop<'static, X11Client>>,
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@ -152,9 +183,7 @@ pub struct X11ClientState {
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pub(crate) cursor_styles: HashMap<xproto::Window, CursorStyle>,
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pub(crate) cursor_cache: HashMap<CursorStyle, xproto::Cursor>,
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pub(crate) scroll_class_data: Vec<xinput::DeviceClassDataScroll>,
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pub(crate) scroll_x: Option<f32>,
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pub(crate) scroll_y: Option<f32>,
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pointer_device_states: BTreeMap<xinput::DeviceId, PointerDeviceState>,
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pub(crate) common: LinuxCommon,
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pub(crate) clipboard: x11_clipboard::Clipboard,
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@ -266,31 +295,21 @@ impl X11Client {
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.prefetch_extension_information(xinput::X11_EXTENSION_NAME)
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.unwrap();
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// Announce to X server that XInput up to 2.1 is supported. To increase this to 2.2 and
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// beyond, support for touch events would need to be added.
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let xinput_version = xcb_connection
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.xinput_xi_query_version(2, 0)
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.xinput_xi_query_version(2, 1)
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.unwrap()
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.reply()
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.unwrap();
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// XInput 1.x is not supported.
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assert!(
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xinput_version.major_version >= 2,
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"XInput Extension v2 not supported."
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"XInput version >= 2 required."
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);
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let master_device_query = xcb_connection
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.xinput_xi_query_device(XINPUT_MASTER_DEVICE)
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.unwrap()
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.reply()
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.unwrap();
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let scroll_class_data = master_device_query
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.infos
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.iter()
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.find(|info| info.type_ == xinput::DeviceType::MASTER_POINTER)
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.unwrap()
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.classes
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.iter()
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.filter_map(|class| class.data.as_scroll())
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.map(|class| *class)
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.collect::<Vec<_>>();
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let pointer_device_states =
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get_new_pointer_device_states(&xcb_connection, &BTreeMap::new());
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let atoms = XcbAtoms::new(&xcb_connection).unwrap().reply().unwrap();
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@ -434,9 +453,7 @@ impl X11Client {
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cursor_styles: HashMap::default(),
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cursor_cache: HashMap::default(),
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scroll_class_data,
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scroll_x: None,
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scroll_y: None,
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pointer_device_states,
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clipboard,
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clipboard_item: None,
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@ -950,35 +967,56 @@ impl X11Client {
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window.handle_ime_commit(text);
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state = self.0.borrow_mut();
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}
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if let Some(button) = button_of_key(event.detail.try_into().unwrap()) {
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let click_elapsed = state.last_click.elapsed();
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match button_or_scroll_from_event_detail(event.detail) {
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Some(ButtonOrScroll::Button(button)) => {
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let click_elapsed = state.last_click.elapsed();
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if click_elapsed < DOUBLE_CLICK_INTERVAL
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&& state
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.last_mouse_button
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.is_some_and(|prev_button| prev_button == button)
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&& is_within_click_distance(state.last_location, position)
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{
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state.current_count += 1;
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} else {
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state.current_count = 1;
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}
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if click_elapsed < DOUBLE_CLICK_INTERVAL
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&& state
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.last_mouse_button
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.is_some_and(|prev_button| prev_button == button)
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&& is_within_click_distance(state.last_location, position)
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{
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state.current_count += 1;
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} else {
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state.current_count = 1;
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state.last_click = Instant::now();
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state.last_mouse_button = Some(button);
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state.last_location = position;
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let current_count = state.current_count;
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drop(state);
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window.handle_input(PlatformInput::MouseDown(crate::MouseDownEvent {
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button,
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position,
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modifiers,
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click_count: current_count,
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first_mouse: false,
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}));
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}
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Some(ButtonOrScroll::Scroll(direction)) => {
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drop(state);
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// Emulated scroll button presses are sent simultaneously with smooth scrolling XinputMotion events.
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// Since handling those events does the scrolling, they are skipped here.
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if !event
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.flags
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.contains(xinput::PointerEventFlags::POINTER_EMULATED)
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{
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let scroll_delta = match direction {
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ScrollDirection::Up => Point::new(0.0, SCROLL_LINES),
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ScrollDirection::Down => Point::new(0.0, -SCROLL_LINES),
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ScrollDirection::Left => Point::new(SCROLL_LINES, 0.0),
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ScrollDirection::Right => Point::new(-SCROLL_LINES, 0.0),
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};
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window.handle_input(PlatformInput::ScrollWheel(
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make_scroll_wheel_event(position, scroll_delta, modifiers),
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));
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}
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}
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None => {
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log::error!("Unknown x11 button: {}", event.detail);
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}
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state.last_click = Instant::now();
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state.last_mouse_button = Some(button);
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state.last_location = position;
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let current_count = state.current_count;
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drop(state);
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window.handle_input(PlatformInput::MouseDown(crate::MouseDownEvent {
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button,
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position,
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modifiers,
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click_count: current_count,
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first_mouse: false,
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}));
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} else {
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log::warn!("Unknown button press: {event:?}");
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}
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}
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Event::XinputButtonRelease(event) => {
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@ -991,15 +1029,19 @@ impl X11Client {
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px(event.event_x as f32 / u16::MAX as f32 / state.scale_factor),
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px(event.event_y as f32 / u16::MAX as f32 / state.scale_factor),
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);
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if let Some(button) = button_of_key(event.detail.try_into().unwrap()) {
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let click_count = state.current_count;
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drop(state);
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window.handle_input(PlatformInput::MouseUp(crate::MouseUpEvent {
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button,
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position,
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modifiers,
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click_count,
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}));
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match button_or_scroll_from_event_detail(event.detail) {
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Some(ButtonOrScroll::Button(button)) => {
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let click_count = state.current_count;
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drop(state);
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window.handle_input(PlatformInput::MouseUp(crate::MouseUpEvent {
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button,
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position,
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modifiers,
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click_count,
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}));
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}
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Some(ButtonOrScroll::Scroll(_)) => {}
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None => {}
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}
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}
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Event::XinputMotion(event) => {
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@ -1014,12 +1056,6 @@ impl X11Client {
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state.modifiers = modifiers;
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drop(state);
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let axisvalues = event
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.axisvalues
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.iter()
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.map(|axisvalue| fp3232_to_f32(*axisvalue))
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.collect::<Vec<_>>();
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if event.valuator_mask[0] & 3 != 0 {
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window.handle_input(PlatformInput::MouseMove(crate::MouseMoveEvent {
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position,
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@ -1028,64 +1064,17 @@ impl X11Client {
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}));
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}
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let mut valuator_idx = 0;
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let scroll_class_data = self.0.borrow().scroll_class_data.clone();
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for shift in 0..32 {
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if (event.valuator_mask[0] >> shift) & 1 == 0 {
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continue;
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state = self.0.borrow_mut();
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if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
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let scroll_delta = get_scroll_delta_and_update_state(&mut pointer, &event);
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drop(state);
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if let Some(scroll_delta) = scroll_delta {
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window.handle_input(PlatformInput::ScrollWheel(make_scroll_wheel_event(
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position,
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scroll_delta,
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modifiers,
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)));
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}
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for scroll_class in &scroll_class_data {
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if scroll_class.scroll_type == xinput::ScrollType::HORIZONTAL
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&& scroll_class.number == shift
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{
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let new_scroll = axisvalues[valuator_idx]
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/ fp3232_to_f32(scroll_class.increment)
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* SCROLL_LINES as f32;
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let old_scroll = self.0.borrow().scroll_x;
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self.0.borrow_mut().scroll_x = Some(new_scroll);
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if let Some(old_scroll) = old_scroll {
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let delta_scroll = old_scroll - new_scroll;
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window.handle_input(PlatformInput::ScrollWheel(
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crate::ScrollWheelEvent {
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position,
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delta: ScrollDelta::Lines(Point::new(delta_scroll, 0.0)),
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modifiers,
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touch_phase: TouchPhase::default(),
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},
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));
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}
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} else if scroll_class.scroll_type == xinput::ScrollType::VERTICAL
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&& scroll_class.number == shift
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{
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// the `increment` is the valuator delta equivalent to one positive unit of scrolling. Here that means SCROLL_LINES lines.
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let new_scroll = axisvalues[valuator_idx]
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/ fp3232_to_f32(scroll_class.increment)
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* SCROLL_LINES as f32;
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let old_scroll = self.0.borrow().scroll_y;
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self.0.borrow_mut().scroll_y = Some(new_scroll);
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if let Some(old_scroll) = old_scroll {
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let delta_scroll = old_scroll - new_scroll;
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let (x, y) = if !modifiers.shift {
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(0.0, delta_scroll)
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} else {
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(delta_scroll, 0.0)
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};
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window.handle_input(PlatformInput::ScrollWheel(
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crate::ScrollWheelEvent {
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position,
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delta: ScrollDelta::Lines(Point::new(x, y)),
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modifiers,
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touch_phase: TouchPhase::default(),
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},
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));
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}
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}
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}
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valuator_idx += 1;
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}
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}
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Event::XinputEnter(event) if event.mode == xinput::NotifyMode::NORMAL => {
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@ -1095,10 +1084,10 @@ impl X11Client {
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state.mouse_focused_window = Some(event.event);
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}
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Event::XinputLeave(event) if event.mode == xinput::NotifyMode::NORMAL => {
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self.0.borrow_mut().scroll_x = None; // Set last scroll to `None` so that a large delta isn't created if scrolling is done outside the window (the valuator is global)
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self.0.borrow_mut().scroll_y = None;
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let mut state = self.0.borrow_mut();
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// 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)
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reset_all_pointer_device_scroll_positions(&mut state.pointer_device_states);
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state.mouse_focused_window = None;
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let pressed_button = pressed_button_from_mask(event.buttons[0]);
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let position = point(
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@ -1117,6 +1106,26 @@ impl X11Client {
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}));
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window.set_hovered(false);
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}
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Event::XinputHierarchy(event) => {
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let mut state = self.0.borrow_mut();
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// Temporarily use `state.pointer_device_states` to only store pointers that still have valid scroll values.
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// Any change to a device invalidates its scroll values.
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for info in event.infos {
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if is_pointer_device(info.type_) {
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state.pointer_device_states.remove(&info.deviceid);
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}
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}
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state.pointer_device_states = get_new_pointer_device_states(
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&state.xcb_connection,
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&state.pointer_device_states,
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);
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}
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Event::XinputDeviceChanged(event) => {
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let mut state = self.0.borrow_mut();
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if let Some(mut pointer) = state.pointer_device_states.get_mut(&event.sourceid) {
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reset_pointer_device_scroll_positions(&mut pointer);
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}
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}
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_ => {}
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};
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|
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@ -1742,3 +1751,142 @@ fn xdnd_send_status(
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.send_event(false, target, EventMask::default(), message)
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.unwrap();
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}
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|
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/// Recomputes `pointer_device_states` by querying all pointer devices.
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/// When a device is present in `scroll_values_to_preserve`, its value for `ScrollAxisState.scroll_value` is used.
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fn get_new_pointer_device_states(
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xcb_connection: &XCBConnection,
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scroll_values_to_preserve: &BTreeMap<xinput::DeviceId, PointerDeviceState>,
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) -> BTreeMap<xinput::DeviceId, PointerDeviceState> {
|
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let devices_query_result = xcb_connection
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.xinput_xi_query_device(XINPUT_ALL_DEVICES)
|
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.unwrap()
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.reply()
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.unwrap();
|
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|
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let mut pointer_device_states = BTreeMap::new();
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pointer_device_states.extend(
|
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devices_query_result
|
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.infos
|
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.iter()
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.filter(|info| is_pointer_device(info.type_))
|
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.filter_map(|info| {
|
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let scroll_data = info
|
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.classes
|
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.iter()
|
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.filter_map(|class| class.data.as_scroll())
|
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.map(|class| *class)
|
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.rev()
|
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.collect::<Vec<_>>();
|
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let old_state = scroll_values_to_preserve.get(&info.deviceid);
|
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let old_horizontal = old_state.map(|state| &state.horizontal);
|
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let old_vertical = old_state.map(|state| &state.vertical);
|
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let horizontal = scroll_data
|
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.iter()
|
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.find(|data| data.scroll_type == xinput::ScrollType::HORIZONTAL)
|
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.map(|data| scroll_data_to_axis_state(data, old_horizontal));
|
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let vertical = scroll_data
|
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.iter()
|
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.find(|data| data.scroll_type == xinput::ScrollType::VERTICAL)
|
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.map(|data| scroll_data_to_axis_state(data, old_vertical));
|
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if horizontal.is_none() && vertical.is_none() {
|
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None
|
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} else {
|
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Some((
|
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info.deviceid,
|
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PointerDeviceState {
|
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horizontal: horizontal.unwrap_or_else(Default::default),
|
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vertical: vertical.unwrap_or_else(Default::default),
|
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},
|
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))
|
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}
|
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}),
|
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);
|
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if pointer_device_states.is_empty() {
|
||||
log::error!("Found no xinput mouse pointers.");
|
||||
}
|
||||
return pointer_device_states;
|
||||
}
|
||||
|
||||
/// Returns true if the device is a pointer device. Does not include pointer device groups.
|
||||
fn is_pointer_device(type_: xinput::DeviceType) -> bool {
|
||||
type_ == xinput::DeviceType::SLAVE_POINTER
|
||||
}
|
||||
|
||||
fn scroll_data_to_axis_state(
|
||||
data: &xinput::DeviceClassDataScroll,
|
||||
old_axis_state_with_valid_scroll_value: Option<&ScrollAxisState>,
|
||||
) -> ScrollAxisState {
|
||||
ScrollAxisState {
|
||||
valuator_number: Some(data.number),
|
||||
multiplier: SCROLL_LINES / fp3232_to_f32(data.increment),
|
||||
scroll_value: old_axis_state_with_valid_scroll_value.and_then(|state| state.scroll_value),
|
||||
}
|
||||
}
|
||||
|
||||
fn reset_all_pointer_device_scroll_positions(
|
||||
pointer_device_states: &mut BTreeMap<xinput::DeviceId, PointerDeviceState>,
|
||||
) {
|
||||
pointer_device_states
|
||||
.iter_mut()
|
||||
.for_each(|(_, device_state)| reset_pointer_device_scroll_positions(device_state));
|
||||
}
|
||||
|
||||
fn reset_pointer_device_scroll_positions(pointer: &mut PointerDeviceState) {
|
||||
pointer.horizontal.scroll_value = None;
|
||||
pointer.vertical.scroll_value = None;
|
||||
}
|
||||
|
||||
/// Returns the scroll delta for a smooth scrolling motion event, or `None` if no scroll data is present.
|
||||
fn get_scroll_delta_and_update_state(
|
||||
pointer: &mut PointerDeviceState,
|
||||
event: &xinput::MotionEvent,
|
||||
) -> Option<Point<f32>> {
|
||||
let delta_x = get_axis_scroll_delta_and_update_state(event, &mut pointer.horizontal);
|
||||
let delta_y = get_axis_scroll_delta_and_update_state(event, &mut pointer.vertical);
|
||||
if delta_x.is_some() || delta_y.is_some() {
|
||||
Some(Point::new(delta_x.unwrap_or(0.0), delta_y.unwrap_or(0.0)))
|
||||
} else {
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
fn get_axis_scroll_delta_and_update_state(
|
||||
event: &xinput::MotionEvent,
|
||||
axis: &mut ScrollAxisState,
|
||||
) -> Option<f32> {
|
||||
let axis_index = get_valuator_axis_index(&event.valuator_mask, axis.valuator_number?)?;
|
||||
if let Some(axis_value) = event.axisvalues.get(axis_index) {
|
||||
let new_scroll = fp3232_to_f32(*axis_value);
|
||||
let delta_scroll = axis
|
||||
.scroll_value
|
||||
.map(|old_scroll| (old_scroll - new_scroll) * axis.multiplier);
|
||||
axis.scroll_value = Some(new_scroll);
|
||||
delta_scroll
|
||||
} else {
|
||||
log::error!("Encountered invalid XInput valuator_mask, scrolling may not work properly.");
|
||||
None
|
||||
}
|
||||
}
|
||||
|
||||
fn make_scroll_wheel_event(
|
||||
position: Point<Pixels>,
|
||||
scroll_delta: Point<f32>,
|
||||
modifiers: Modifiers,
|
||||
) -> crate::ScrollWheelEvent {
|
||||
// When shift is held down, vertical scrolling turns into horizontal scrolling.
|
||||
let delta = if modifiers.shift {
|
||||
Point {
|
||||
x: scroll_delta.y,
|
||||
y: 0.0,
|
||||
}
|
||||
} else {
|
||||
scroll_delta
|
||||
};
|
||||
crate::ScrollWheelEvent {
|
||||
position,
|
||||
delta: ScrollDelta::Lines(delta),
|
||||
modifiers,
|
||||
touch_phase: TouchPhase::default(),
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue