89 lines
3 KiB
Rust
89 lines
3 KiB
Rust
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use std::collections::VecDeque;
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use cocoa::{appkit::{self, NSEvent}, base::id};
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use objc::{declare::ClassDecl, runtime::{Class, Object, Sel}};
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use event::{DeviceEvent, Event};
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use platform_impl::platform::{app_state::AppState, DEVICE_ID, util};
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pub struct AppClass(pub *const Class);
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unsafe impl Send for AppClass {}
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unsafe impl Sync for AppClass {}
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lazy_static! {
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pub static ref APP_CLASS: AppClass = unsafe {
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let superclass = class!(NSApplication);
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let mut decl = ClassDecl::new("WinitApp", superclass).unwrap();
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decl.add_method(
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sel!(sendEvent:),
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send_event as extern fn(&Object, Sel, id),
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);
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AppClass(decl.register())
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};
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}
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// Normally, holding Cmd + any key never sends us a `keyUp` event for that key.
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// Overriding `sendEvent:` like this fixes that. (https://stackoverflow.com/a/15294196)
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// Fun fact: Firefox still has this bug! (https://bugzilla.mozilla.org/show_bug.cgi?id=1299553)
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extern fn send_event(this: &Object, _sel: Sel, event: id) {
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unsafe {
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// For posterity, there are some undocumented event types
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// (https://github.com/servo/cocoa-rs/issues/155)
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// but that doesn't really matter here.
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let event_type = event.eventType();
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let modifier_flags = event.modifierFlags();
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if event_type == appkit::NSKeyUp && util::has_flag(
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modifier_flags,
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appkit::NSEventModifierFlags::NSCommandKeyMask,
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) {
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let key_window: id = msg_send![this, keyWindow];
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let _: () = msg_send![key_window, sendEvent:event];
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} else {
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maybe_dispatch_device_event(event);
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let superclass = util::superclass(this);
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let _: () = msg_send![super(this, superclass), sendEvent:event];
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}
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}
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}
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unsafe fn maybe_dispatch_device_event(event: id) {
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let event_type = event.eventType();
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match event_type {
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appkit::NSMouseMoved |
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appkit::NSLeftMouseDragged |
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appkit::NSOtherMouseDragged |
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appkit::NSRightMouseDragged => {
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let mut events = VecDeque::with_capacity(3);
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let delta_x = event.deltaX() as f64;
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let delta_y = event.deltaY() as f64;
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if delta_x != 0.0 {
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events.push_back(Event::DeviceEvent {
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device_id: DEVICE_ID,
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event: DeviceEvent::Motion { axis: 0, value: delta_x },
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});
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}
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if delta_y != 0.0 {
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events.push_back(Event::DeviceEvent {
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device_id: DEVICE_ID,
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event: DeviceEvent::Motion { axis: 1, value: delta_y },
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});
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}
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if delta_x != 0.0 || delta_y != 0.0 {
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events.push_back(Event::DeviceEvent {
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device_id: DEVICE_ID,
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event: DeviceEvent::MouseMotion { delta: (delta_x, delta_y) },
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});
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}
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AppState::queue_events(events);
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},
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_ => (),
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}
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}
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