diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/api/x11/ffi.rs | 2 | ||||
| -rw-r--r-- | src/api/x11/input.rs | 328 | ||||
| -rw-r--r-- | src/api/x11/mod.rs | 1 | ||||
| -rw-r--r-- | src/api/x11/window.rs | 163 | ||||
| -rw-r--r-- | src/api/x11/xdisplay.rs | 3 |
5 files changed, 406 insertions, 91 deletions
diff --git a/src/api/x11/ffi.rs b/src/api/x11/ffi.rs index 8c9a35d..3d4f0ed 100644 --- a/src/api/x11/ffi.rs +++ b/src/api/x11/ffi.rs @@ -2,6 +2,8 @@ pub use x11_dl::keysym::*; pub use x11_dl::xcursor::*; pub use x11_dl::xf86vmode::*; pub use x11_dl::xlib::*; +pub use x11_dl::xinput::*; +pub use x11_dl::xinput2::*; pub use self::glx::types::GLXContext; diff --git a/src/api/x11/input.rs b/src/api/x11/input.rs new file mode 100644 index 0000000..25add95 --- /dev/null +++ b/src/api/x11/input.rs @@ -0,0 +1,328 @@ +use std::sync::Arc; + +use libc; +use std::{mem, ptr}; +use std::ffi::CString; +use std::slice::from_raw_parts; + +use events::Event; + +use super::{events, ffi}; +use super::XConnection; + +#[derive(Debug)] +enum AxisType { + HorizontalScroll, + VerticalScroll +} + +#[derive(Debug)] +struct Axis { + id: i32, + device_id: i32, + axis_number: i32, + axis_type: AxisType +} + +#[derive(Debug)] +struct AxisValue { + device_id: i32, + axis_number: i32, + value: f64 +} + +struct InputState { + /// Last-seen cursor position within a window in (x, y) + /// coordinates + cursor_pos: (f64, f64), + /// Last-seen positions of axes, used to report delta + /// movements when a new absolute axis value is received + axis_values: Vec<AxisValue> +} + +pub struct XInputEventHandler { + display: Arc<XConnection>, + window: ffi::Window, + ic: ffi::XIC, + axis_list: Vec<Axis>, + current_state: InputState +} + +impl XInputEventHandler { + pub fn new(display: &Arc<XConnection>, window: ffi::Window, ic: ffi::XIC) -> XInputEventHandler { + // query XInput support + let mut opcode: libc::c_int = 0; + let mut event: libc::c_int = 0; + let mut error: libc::c_int = 0; + let xinput_str = CString::new("XInputExtension").unwrap(); + + unsafe { + if (display.xlib.XQueryExtension)(display.display, xinput_str.as_ptr(), &mut opcode, &mut event, &mut error) == ffi::False { + panic!("XInput not available") + } + } + + let mut xinput_major_ver = ffi::XI_2_Major; + let mut xinput_minor_ver = ffi::XI_2_Minor; + + unsafe { + if (display.xinput2.XIQueryVersion)(display.display, &mut xinput_major_ver, &mut xinput_minor_ver) != ffi::Success as libc::c_int { + panic!("Unable to determine XInput version"); + } + } + + // specify the XInput events we want to receive. + // Button clicks and mouse events are handled via XInput + // events. Key presses are still handled via plain core + // X11 events. + let mut mask: [libc::c_uchar; 2] = [0, 0]; + let mut input_event_mask = ffi::XIEventMask { + deviceid: ffi::XIAllDevices, + mask_len: mask.len() as i32, + mask: mask.as_mut_ptr() + }; + let events = &[ + ffi::XI_ButtonPress, + ffi::XI_ButtonRelease, + ffi::XI_Motion, + ffi::XI_Enter, + ffi::XI_Leave, + ffi::XI_FocusIn, + ffi::XI_FocusOut + ]; + for event in events { + ffi::XISetMask(&mut mask, *event); + } + + unsafe { + match (display.xinput2.XISelectEvents)(display.display, window, &mut input_event_mask, 1) { + status if status as u8 == ffi::Success => (), + err => panic!("Failed to select events {:?}", err) + } + } + + XInputEventHandler { + display: display.clone(), + window: window, + ic: ic, + axis_list: read_input_axis_info(display), + current_state: InputState { + cursor_pos: (0.0, 0.0), + axis_values: Vec::new() + } + } + } + + pub fn translate_key_event(&self, event: &mut ffi::XKeyEvent) -> Vec<Event> { + use events::Event::{KeyboardInput, ReceivedCharacter}; + use events::ElementState::{Pressed, Released}; + + let mut translated_events = Vec::new(); + + let state; + if event.type_ == ffi::KeyPress { + let raw_ev: *mut ffi::XKeyEvent = event; + unsafe { (self.display.xlib.XFilterEvent)(mem::transmute(raw_ev), self.window) }; + state = Pressed; + } else { + state = Released; + } + + let mut kp_keysym = 0; + + let written = unsafe { + use std::str; + + let mut buffer: [u8; 16] = [mem::uninitialized(); 16]; + let raw_ev: *mut ffi::XKeyEvent = event; + let count = (self.display.xlib.Xutf8LookupString)(self.ic, mem::transmute(raw_ev), + mem::transmute(buffer.as_mut_ptr()), + buffer.len() as libc::c_int, &mut kp_keysym, ptr::null_mut()); + + str::from_utf8(&buffer[..count as usize]).unwrap_or("").to_string() + }; + + for chr in written.chars() { + translated_events.push(ReceivedCharacter(chr)); + } + + let mut keysym = unsafe { + (self.display.xlib.XKeycodeToKeysym)(self.display.display, event.keycode as ffi::KeyCode, 0) + }; + + if (ffi::XK_KP_Space as libc::c_ulong <= keysym) && (keysym <= ffi::XK_KP_9 as libc::c_ulong) { + keysym = kp_keysym + }; + + let vkey = events::keycode_to_element(keysym as libc::c_uint); + + translated_events.push(KeyboardInput(state, event.keycode as u8, vkey)); + translated_events + } + + pub fn translate_event(&mut self, cookie: &ffi::XGenericEventCookie) -> Option<Event> { + use events::Event::{Focused, MouseInput, MouseMoved, MouseWheel}; + use events::ElementState::{Pressed, Released}; + use events::MouseButton::{Left, Right, Middle}; + use events::MouseScrollDelta::{PixelDelta, LineDelta}; + + match cookie.evtype { + ffi::XI_ButtonPress | ffi::XI_ButtonRelease => { + let event_data: &ffi::XIDeviceEvent = unsafe{mem::transmute(cookie.data)}; + let state = if cookie.evtype == ffi::XI_ButtonPress { + Pressed + } else { + Released + }; + match event_data.detail as u32 { + ffi::Button1 => Some(MouseInput(state, Left)), + ffi::Button2 => Some(MouseInput(state, Middle)), + ffi::Button3 => Some(MouseInput(state, Right)), + ffi::Button4 | ffi::Button5 => { + if event_data.flags & ffi::XIPointerEmulated == 0 { + // scroll event from a traditional wheel with + // distinct 'clicks' + let delta = if event_data.detail as u32 == ffi::Button4 { + 1.0 + } else { + -1.0 + }; + Some(MouseWheel(LineDelta(0.0, delta))) + } else { + // emulated button event from a touch/smooth-scroll + // event. Ignore these events and handle scrolling + // via XI_Motion event handler instead + None + } + } + _ => None + } + }, + ffi::XI_Motion => { + let event_data: &ffi::XIDeviceEvent = unsafe{mem::transmute(cookie.data)}; + let axis_state = event_data.valuators; + let mask = unsafe{ from_raw_parts(axis_state.mask, axis_state.mask_len as usize) }; + let mut axis_count = 0; + + let mut scroll_delta = (0.0, 0.0); + for axis_id in 0..axis_state.mask_len { + if ffi::XIMaskIsSet(&mask, axis_id) { + let axis_value = unsafe{*axis_state.values.offset(axis_count)}; + let delta = calc_scroll_deltas(event_data, axis_id, axis_value, &self.axis_list, + &mut self.current_state.axis_values); + scroll_delta.0 += delta.0; + scroll_delta.1 += delta.1; + axis_count += 1; + } + } + + if scroll_delta.0.abs() > 0.0 || scroll_delta.1.abs() > 0.0 { + Some(MouseWheel(PixelDelta(scroll_delta.0 as f32, scroll_delta.1 as f32))) + } else { + let new_cursor_pos = (event_data.event_x, event_data.event_y); + if new_cursor_pos != self.current_state.cursor_pos { + self.current_state.cursor_pos = new_cursor_pos; + Some(MouseMoved((new_cursor_pos.0 as i32, new_cursor_pos.1 as i32))) + } else { + None + } + } + }, + ffi::XI_Enter => { + // axis movements whilst the cursor is outside the window + // will alter the absolute value of the axes. We only want to + // report changes in the axis value whilst the cursor is above + // our window however, so clear the previous axis state whenever + // the cursor re-enters the window + self.current_state.axis_values.clear(); + None + }, + ffi::XI_Leave => None, + ffi::XI_FocusIn => Some(Focused(true)), + ffi::XI_FocusOut => Some(Focused(false)), + _ => None + } + } +} + +fn read_input_axis_info(display: &Arc<XConnection>) -> Vec<Axis> { + let mut axis_list = Vec::new(); + let mut device_count = 0; + + // only get events from the master devices which are 'attached' + // to the keyboard or cursor + let devices = unsafe{ + (display.xinput2.XIQueryDevice)(display.display, ffi::XIAllMasterDevices, &mut device_count) + }; + for i in 0..device_count { + let device = unsafe { *(devices.offset(i as isize)) }; + for k in 0..device.num_classes { + let class = unsafe { *(device.classes.offset(k as isize)) }; + match unsafe { (*class)._type } { + // Note that scroll axis + // are reported both as 'XIScrollClass' and 'XIValuatorClass' + // axes. For the moment we only care about scrolling axes. + ffi::XIScrollClass => { + let scroll_class: &ffi::XIScrollClassInfo = unsafe{mem::transmute(class)}; + axis_list.push(Axis{ + id: scroll_class.sourceid, + device_id: device.deviceid, + axis_number: scroll_class.number, + axis_type: match scroll_class.scroll_type { + ffi::XIScrollTypeHorizontal => AxisType::HorizontalScroll, + ffi::XIScrollTypeVertical => AxisType::VerticalScroll, + _ => { unreachable!() } + } + }) + }, + _ => {} + } + } + } + + axis_list +} + +/// Given an input motion event for an axis and the previous +/// state of the axes, return the horizontal/vertical +/// scroll deltas +fn calc_scroll_deltas(event: &ffi::XIDeviceEvent, + axis_id: i32, + axis_value: f64, + axis_list: &[Axis], + prev_axis_values: &mut Vec<AxisValue>) -> (f64, f64) { + let prev_value_pos = prev_axis_values.iter().position(|prev_axis| { + prev_axis.device_id == event.sourceid && + prev_axis.axis_number == axis_id + }); + let delta = match prev_value_pos { + Some(idx) => axis_value - prev_axis_values[idx].value, + None => 0.0 + }; + + let new_axis_value = AxisValue{ + device_id: event.sourceid, + axis_number: axis_id, + value: axis_value + }; + + match prev_value_pos { + Some(idx) => prev_axis_values[idx] = new_axis_value, + None => prev_axis_values.push(new_axis_value) + } + + let mut scroll_delta = (0.0, 0.0); + + for axis in axis_list.iter() { + if axis.id == event.sourceid && + axis.axis_number == axis_id { + match axis.axis_type { + AxisType::HorizontalScroll => scroll_delta.0 = delta, + AxisType::VerticalScroll => scroll_delta.1 = delta + } + } + } + + scroll_delta +} + diff --git a/src/api/x11/mod.rs b/src/api/x11/mod.rs index e900583..1ba6bc7 100644 --- a/src/api/x11/mod.rs +++ b/src/api/x11/mod.rs @@ -7,6 +7,7 @@ pub use self::xdisplay::XConnection; pub mod ffi; mod events; +mod input; mod monitor; mod window; mod xdisplay; diff --git a/src/api/x11/window.rs b/src/api/x11/window.rs index 15e27ce..b13a94a 100644 --- a/src/api/x11/window.rs +++ b/src/api/x11/window.rs @@ -2,6 +2,7 @@ use {Event, BuilderAttribs, MouseCursor}; use CreationError; use CreationError::OsError; use libc; +use std::borrow::Borrow; use std::{mem, ptr}; use std::cell::Cell; use std::sync::atomic::AtomicBool; @@ -20,7 +21,8 @@ use api::egl::Context as EglContext; use platform::MonitorID as PlatformMonitorID; -use super::{events, ffi}; +use super::input::XInputEventHandler; +use super::{ffi}; use super::{MonitorID, XConnection}; // XOpenIM doesn't seem to be thread-safe @@ -106,33 +108,69 @@ impl WindowProxy { } } +// XEvents of type GenericEvent store their actual data +// in an XGenericEventCookie data structure. This is a wrapper +// to extract the cookie from a GenericEvent XEvent and release +// the cookie data once it has been processed +struct GenericEventCookie<'a> { + display: &'a XConnection, + cookie: ffi::XGenericEventCookie +} + +impl<'a> GenericEventCookie<'a> { + fn from_event<'b>(display: &'b XConnection, event: ffi::XEvent) -> Option<GenericEventCookie<'b>> { + unsafe { + let mut cookie: ffi::XGenericEventCookie = From::from(event); + if (display.xlib.XGetEventData)(display.display, &mut cookie) == ffi::True { + Some(GenericEventCookie{display: display, cookie: cookie}) + } else { + None + } + } + } +} + +impl<'a> Drop for GenericEventCookie<'a> { + fn drop(&mut self) { + unsafe { + let xlib = &self.display.xlib; + (xlib.XFreeEventData)(self.display.display, &mut self.cookie); + } + } +} + pub struct PollEventsIterator<'a> { - window: &'a Window, + window: &'a Window } impl<'a> Iterator for PollEventsIterator<'a> { type Item = Event; fn next(&mut self) -> Option<Event> { - if let Some(ev) = self.window.pending_events.lock().unwrap().pop_front() { - return Some(ev); - } + let xlib = &self.window.x.display.xlib; loop { + if let Some(ev) = self.window.pending_events.lock().unwrap().pop_front() { + return Some(ev); + } + let mut xev = unsafe { mem::uninitialized() }; - let res = unsafe { (self.window.x.display.xlib.XCheckMaskEvent)(self.window.x.display.display, -1, &mut xev) }; + let res = unsafe { (xlib.XCheckMaskEvent)(self.window.x.display.display, -1, &mut xev) }; if res == 0 { - let res = unsafe { (self.window.x.display.xlib.XCheckTypedEvent)(self.window.x.display.display, ffi::ClientMessage, &mut xev) }; + let res = unsafe { (xlib.XCheckTypedEvent)(self.window.x.display.display, ffi::ClientMessage, &mut xev) }; if res == 0 { - return None; + let res = unsafe { (xlib.XCheckTypedEvent)(self.window.x.display.display, ffi::GenericEvent, &mut xev) }; + if res == 0 { + return None; + } } } match xev.get_type() { ffi::KeymapNotify => { - unsafe { (self.window.x.display.xlib.XRefreshKeyboardMapping)(mem::transmute(&xev)); } + unsafe { (xlib.XRefreshKeyboardMapping)(mem::transmute(&xev)); } }, ffi::ClientMessage => { @@ -164,93 +202,34 @@ impl<'a> Iterator for PollEventsIterator<'a> { return Some(Refresh); }, - ffi::MotionNotify => { - use events::Event::MouseMoved; - let event: &ffi::XMotionEvent = unsafe { mem::transmute(&xev) }; - return Some(MouseMoved((event.x as i32, event.y as i32))); - }, - - ffi::KeyPress | ffi::KeyRelease => { - use events::Event::{KeyboardInput, ReceivedCharacter}; - use events::ElementState::{Pressed, Released}; - let event: &mut ffi::XKeyEvent = unsafe { mem::transmute(&mut xev) }; - - if event.type_ == ffi::KeyPress { - let raw_ev: *mut ffi::XKeyEvent = event; - unsafe { (self.window.x.display.xlib.XFilterEvent)(mem::transmute(raw_ev), self.window.x.window) }; - } - - let state = if xev.get_type() == ffi::KeyPress { Pressed } else { Released }; - - let mut kp_keysym = 0; - - let written = unsafe { - use std::str; - - let mut buffer: [u8; 16] = [mem::uninitialized(); 16]; - let raw_ev: *mut ffi::XKeyEvent = event; - let count = (self.window.x.display.xlib.Xutf8LookupString)(self.window.x.ic, mem::transmute(raw_ev), - mem::transmute(buffer.as_mut_ptr()), - buffer.len() as libc::c_int, &mut kp_keysym, ptr::null_mut()); - - str::from_utf8(&buffer[..count as usize]).unwrap_or("").to_string() - }; - - { - let mut pending = self.window.pending_events.lock().unwrap(); - for chr in written.chars() { - pending.push_back(ReceivedCharacter(chr)); - } + ffi::KeyPress | ffi::KeyRelease => { + let mut event: &mut ffi::XKeyEvent = unsafe { mem::transmute(&mut xev) }; + let events = self.window.input_handler.lock().unwrap().translate_key_event(&mut event); + for event in events { + self.window.pending_events.lock().unwrap().push_back(event); } - - let mut keysym = unsafe { - (self.window.x.display.xlib.XKeycodeToKeysym)(self.window.x.display.display, event.keycode as ffi::KeyCode, 0) - }; - - if (ffi::XK_KP_Space as libc::c_ulong <= keysym) && (keysym <= ffi::XK_KP_9 as libc::c_ulong) { - keysym = kp_keysym - }; - - let vkey = events::keycode_to_element(keysym as libc::c_uint); - - return Some(KeyboardInput(state, event.keycode as u8, vkey)); }, - ffi::ButtonPress | ffi::ButtonRelease => { - use events::Event::{MouseInput, MouseWheel}; - use events::ElementState::{Pressed, Released}; - use events::MouseButton::{Left, Right, Middle}; - use events::MouseScrollDelta::{LineDelta}; - - let event: &ffi::XButtonEvent = unsafe { mem::transmute(&xev) }; - - let state = if xev.get_type() == ffi::ButtonPress { Pressed } else { Released }; - - let button = match event.button { - ffi::Button1 => Some(Left), - ffi::Button2 => Some(Middle), - ffi::Button3 => Some(Right), - ffi::Button4 => { - let delta = LineDelta(0.0, 1.0); - self.window.pending_events.lock().unwrap().push_back(MouseWheel(delta)); - None - } - ffi::Button5 => { - let delta = LineDelta(0.0, -1.0); - self.window.pending_events.lock().unwrap().push_back(MouseWheel(delta)); - None + ffi::GenericEvent => { + if let Some(cookie) = GenericEventCookie::from_event(self.window.x.display.borrow(), xev) { + match cookie.cookie.evtype { + ffi::XI_DeviceChanged...ffi::XI_LASTEVENT => { + match self.window.input_handler.lock() { + Ok(mut handler) => { + match handler.translate_event(&cookie.cookie) { + Some(event) => self.window.pending_events.lock().unwrap().push_back(event), + None => {} + } + }, + Err(_) => {} + } + }, + _ => {} } - _ => None - }; - - match button { - Some(button) => - return Some(MouseInput(state, button)), - None => () - }; - }, + } + } - _ => () + _ => {} }; } } @@ -296,6 +275,7 @@ pub struct Window { /// Events that have been retreived with XLib but not dispatched with iterators yet pending_events: Mutex<VecDeque<Event>>, cursor_state: Mutex<CursorState>, + input_handler: Mutex<XInputEventHandler> } impl Window { @@ -608,6 +588,7 @@ impl Window { pixel_format: pixel_format, pending_events: Mutex::new(VecDeque::new()), cursor_state: Mutex::new(CursorState::Normal), + input_handler: Mutex::new(XInputEventHandler::new(display, window, ic)) }; // returning diff --git a/src/api/x11/xdisplay.rs b/src/api/x11/xdisplay.rs index 9037155..2576b74 100644 --- a/src/api/x11/xdisplay.rs +++ b/src/api/x11/xdisplay.rs @@ -12,6 +12,7 @@ pub struct XConnection { pub xlib: ffi::Xlib, pub xf86vmode: ffi::Xf86vmode, pub xcursor: ffi::Xcursor, + pub xinput2: ffi::XInput2, pub glx: Option<ffi::glx::Glx>, pub egl: Option<Egl>, pub display: *mut ffi::Display, @@ -30,6 +31,7 @@ impl XConnection { let xlib = try!(ffi::Xlib::open().map_err(|_| XNotSupported)); let xcursor = try!(ffi::Xcursor::open().map_err(|_| XNotSupported)); let xf86vmode = try!(ffi::Xf86vmode::open().map_err(|_| XNotSupported)); + let xinput2 = try!(ffi::XInput2::open().map_err(|_| XNotSupported)); unsafe extern "C" fn x_error_callback(_: *mut ffi::Display, event: *mut ffi::XErrorEvent) -> libc::c_int @@ -86,6 +88,7 @@ impl XConnection { xlib: xlib, xf86vmode: xf86vmode, xcursor: xcursor, + xinput2: xinput2, glx: glx, egl: egl, display: display, |