f09259f6de
This should force the use of system libraries for Fontconfig and freetype instead of building them with cmake if missing. This also fixes compilation failures on nightly. Fixes #2373.
575 lines
21 KiB
Rust
575 lines
21 KiB
Rust
use std::{
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f64,
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os::raw::c_void,
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sync::{Arc, Weak},
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};
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use cocoa::{
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appkit::{self, NSApplicationPresentationOptions, NSView, NSWindow, NSWindowOcclusionState},
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base::{id, nil},
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foundation::NSUInteger,
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};
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use objc::{
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declare::ClassDecl,
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rc::autoreleasepool,
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runtime::{Class, Object, Sel, BOOL, NO, YES},
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};
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use once_cell::sync::Lazy;
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use crate::{
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dpi::{LogicalPosition, LogicalSize},
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event::{Event, ModifiersState, WindowEvent},
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platform_impl::platform::{
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app_state::AppState,
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event::{EventProxy, EventWrapper},
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util::{self, IdRef},
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view::ViewState,
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window::{get_window_id, UnownedWindow},
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},
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window::{Fullscreen, WindowId},
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};
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pub struct WindowDelegateState {
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ns_window: IdRef, // never changes
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ns_view: IdRef, // never changes
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window: Weak<UnownedWindow>,
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// TODO: It's possible for delegate methods to be called asynchronously,
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// causing data races / `RefCell` panics.
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// This is set when WindowBuilder::with_fullscreen was set,
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// see comments of `window_did_fail_to_enter_fullscreen`
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initial_fullscreen: bool,
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// During `windowDidResize`, we use this to only send Moved if the position changed.
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previous_position: Option<(f64, f64)>,
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// Used to prevent redundant events.
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previous_scale_factor: f64,
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}
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impl WindowDelegateState {
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pub fn new(window: &Arc<UnownedWindow>, initial_fullscreen: bool) -> Self {
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let scale_factor = window.scale_factor();
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let mut delegate_state = WindowDelegateState {
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ns_window: window.ns_window.clone(),
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ns_view: window.ns_view.clone(),
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window: Arc::downgrade(window),
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initial_fullscreen,
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previous_position: None,
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previous_scale_factor: scale_factor,
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};
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if scale_factor != 1.0 {
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delegate_state.emit_static_scale_factor_changed_event();
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}
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delegate_state
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}
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fn with_window<F, T>(&mut self, callback: F) -> Option<T>
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where
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F: FnOnce(&UnownedWindow) -> T,
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{
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self.window.upgrade().map(|ref window| callback(window))
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}
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pub fn emit_event(&mut self, event: WindowEvent<'static>) {
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let event = Event::WindowEvent {
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window_id: WindowId(get_window_id(*self.ns_window)),
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event,
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};
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AppState::queue_event(EventWrapper::StaticEvent(event));
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}
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pub fn emit_static_scale_factor_changed_event(&mut self) {
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let scale_factor = self.get_scale_factor();
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if scale_factor == self.previous_scale_factor {
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return;
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};
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self.previous_scale_factor = scale_factor;
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let wrapper = EventWrapper::EventProxy(EventProxy::DpiChangedProxy {
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ns_window: IdRef::retain(*self.ns_window),
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suggested_size: self.view_size(),
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scale_factor,
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});
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AppState::queue_event(wrapper);
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}
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fn emit_move_event(&mut self) {
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let rect = unsafe { NSWindow::frame(*self.ns_window) };
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let x = rect.origin.x as f64;
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let y = util::bottom_left_to_top_left(rect);
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let moved = self.previous_position != Some((x, y));
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if moved {
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self.previous_position = Some((x, y));
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let scale_factor = self.get_scale_factor();
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let physical_pos = LogicalPosition::<f64>::from((x, y)).to_physical(scale_factor);
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self.emit_event(WindowEvent::Moved(physical_pos));
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}
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}
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fn get_scale_factor(&self) -> f64 {
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(unsafe { NSWindow::backingScaleFactor(*self.ns_window) }) as f64
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}
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fn view_size(&self) -> LogicalSize<f64> {
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let ns_size = unsafe { NSView::frame(*self.ns_view).size };
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LogicalSize::new(ns_size.width as f64, ns_size.height as f64)
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}
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}
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pub fn new_delegate(window: &Arc<UnownedWindow>, initial_fullscreen: bool) -> IdRef {
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let state = WindowDelegateState::new(window, initial_fullscreen);
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unsafe {
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// This is free'd in `dealloc`
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let state_ptr = Box::into_raw(Box::new(state)) as *mut c_void;
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let delegate: id = msg_send![WINDOW_DELEGATE_CLASS.0, alloc];
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IdRef::new(msg_send![delegate, initWithWinit: state_ptr])
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}
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}
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struct WindowDelegateClass(*const Class);
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unsafe impl Send for WindowDelegateClass {}
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unsafe impl Sync for WindowDelegateClass {}
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static WINDOW_DELEGATE_CLASS: Lazy<WindowDelegateClass> = Lazy::new(|| unsafe {
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let superclass = class!(NSResponder);
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let mut decl = ClassDecl::new("WinitWindowDelegate", superclass).unwrap();
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decl.add_method(sel!(dealloc), dealloc as extern "C" fn(&Object, Sel));
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decl.add_method(
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sel!(initWithWinit:),
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init_with_winit as extern "C" fn(&Object, Sel, *mut c_void) -> id,
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);
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decl.add_method(
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sel!(windowShouldClose:),
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window_should_close as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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decl.add_method(
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sel!(windowWillClose:),
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window_will_close as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidResize:),
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window_did_resize as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidMove:),
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window_did_move as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidChangeBackingProperties:),
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window_did_change_backing_properties as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidBecomeKey:),
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window_did_become_key as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidResignKey:),
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window_did_resign_key as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(draggingEntered:),
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dragging_entered as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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decl.add_method(
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sel!(prepareForDragOperation:),
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prepare_for_drag_operation as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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decl.add_method(
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sel!(performDragOperation:),
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perform_drag_operation as extern "C" fn(&Object, Sel, id) -> BOOL,
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);
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decl.add_method(
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sel!(concludeDragOperation:),
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conclude_drag_operation as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(draggingExited:),
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dragging_exited as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(window:willUseFullScreenPresentationOptions:),
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window_will_use_fullscreen_presentation_options
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as extern "C" fn(&Object, Sel, id, NSUInteger) -> NSUInteger,
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);
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decl.add_method(
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sel!(windowDidEnterFullScreen:),
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window_did_enter_fullscreen as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowWillEnterFullScreen:),
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window_will_enter_fullscreen as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidExitFullScreen:),
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window_did_exit_fullscreen as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowWillExitFullScreen:),
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window_will_exit_fullscreen as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidFailToEnterFullScreen:),
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window_did_fail_to_enter_fullscreen as extern "C" fn(&Object, Sel, id),
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);
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decl.add_method(
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sel!(windowDidChangeOcclusionState:),
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window_did_change_occlusion_state as extern "C" fn(&Object, Sel, id),
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);
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decl.add_ivar::<*mut c_void>("winitState");
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WindowDelegateClass(decl.register())
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});
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// This function is definitely unsafe, but labeling that would increase
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// boilerplate and wouldn't really clarify anything...
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fn with_state<F: FnOnce(&mut WindowDelegateState) -> T, T>(this: &Object, callback: F) {
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let state_ptr = unsafe {
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let state_ptr: *mut c_void = *this.get_ivar("winitState");
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&mut *(state_ptr as *mut WindowDelegateState)
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};
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callback(state_ptr);
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}
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extern "C" fn dealloc(this: &Object, _sel: Sel) {
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with_state(this, |state| unsafe {
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drop(Box::from_raw(state as *mut WindowDelegateState));
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});
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}
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extern "C" fn init_with_winit(this: &Object, _sel: Sel, state: *mut c_void) -> id {
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unsafe {
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let this: id = msg_send![this, init];
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if this != nil {
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(*this).set_ivar("winitState", state);
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with_state(&*this, |state| {
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let _: () = msg_send![*state.ns_window, setDelegate: this];
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});
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}
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this
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}
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}
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extern "C" fn window_should_close(this: &Object, _: Sel, _: id) -> BOOL {
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trace_scope!("windowShouldClose:");
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with_state(this, |state| state.emit_event(WindowEvent::CloseRequested));
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NO
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}
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extern "C" fn window_will_close(this: &Object, _: Sel, _: id) {
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trace_scope!("windowWillClose:");
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with_state(this, |state| unsafe {
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// `setDelegate:` retains the previous value and then autoreleases it
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autoreleasepool(|| {
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// Since El Capitan, we need to be careful that delegate methods can't
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// be called after the window closes.
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let _: () = msg_send![*state.ns_window, setDelegate: nil];
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});
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state.emit_event(WindowEvent::Destroyed);
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});
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}
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extern "C" fn window_did_resize(this: &Object, _: Sel, _: id) {
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trace_scope!("windowDidResize:");
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with_state(this, |state| {
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// NOTE: WindowEvent::Resized is reported in frameDidChange.
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state.emit_move_event();
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});
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}
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// This won't be triggered if the move was part of a resize.
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extern "C" fn window_did_move(this: &Object, _: Sel, _: id) {
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trace_scope!("windowDidMove:");
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with_state(this, |state| {
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state.emit_move_event();
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});
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}
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extern "C" fn window_did_change_backing_properties(this: &Object, _: Sel, _: id) {
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trace_scope!("windowDidChangeBackingProperties:");
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with_state(this, |state| {
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state.emit_static_scale_factor_changed_event();
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});
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}
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extern "C" fn window_did_become_key(this: &Object, _: Sel, _: id) {
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trace_scope!("windowDidBecomeKey:");
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with_state(this, |state| {
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// TODO: center the cursor if the window had mouse grab when it
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// lost focus
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state.emit_event(WindowEvent::Focused(true));
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});
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}
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extern "C" fn window_did_resign_key(this: &Object, _: Sel, _: id) {
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trace_scope!("windowDidResignKey:");
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with_state(this, |state| {
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// It happens rather often, e.g. when the user is Cmd+Tabbing, that the
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// NSWindowDelegate will receive a didResignKey event despite no event
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// being received when the modifiers are released. This is because
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// flagsChanged events are received by the NSView instead of the
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// NSWindowDelegate, and as a result a tracked modifiers state can quite
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// easily fall out of synchrony with reality. This requires us to emit
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// a synthetic ModifiersChanged event when we lose focus.
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//
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// Here we (very unsafely) acquire the winitState (a ViewState) from the
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// Object referenced by state.ns_view (an IdRef, which is dereferenced
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// to an id)
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let view_state: &mut ViewState = unsafe {
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let ns_view: &Object = (*state.ns_view).as_ref().expect("failed to deref");
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let state_ptr: *mut c_void = *ns_view.get_ivar("winitState");
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&mut *(state_ptr as *mut ViewState)
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};
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// Both update the state and emit a ModifiersChanged event.
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if !view_state.modifiers.is_empty() {
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view_state.modifiers = ModifiersState::empty();
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state.emit_event(WindowEvent::ModifiersChanged(view_state.modifiers));
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}
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state.emit_event(WindowEvent::Focused(false));
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});
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}
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/// Invoked when the dragged image enters destination bounds or frame
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extern "C" fn dragging_entered(this: &Object, _: Sel, sender: id) -> BOOL {
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trace_scope!("draggingEntered:");
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use cocoa::{appkit::NSPasteboard, foundation::NSFastEnumeration};
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use std::path::PathBuf;
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let pb: id = unsafe { msg_send![sender, draggingPasteboard] };
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let filenames = unsafe { NSPasteboard::propertyListForType(pb, appkit::NSFilenamesPboardType) };
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for file in unsafe { filenames.iter() } {
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use cocoa::foundation::NSString;
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use std::ffi::CStr;
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unsafe {
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let f = NSString::UTF8String(file);
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let path = CStr::from_ptr(f).to_string_lossy().into_owned();
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with_state(this, |state| {
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state.emit_event(WindowEvent::HoveredFile(PathBuf::from(path)));
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});
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}
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}
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YES
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}
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/// Invoked when the image is released
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extern "C" fn prepare_for_drag_operation(_: &Object, _: Sel, _: id) -> BOOL {
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trace_scope!("prepareForDragOperation:");
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YES
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}
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/// Invoked after the released image has been removed from the screen
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extern "C" fn perform_drag_operation(this: &Object, _: Sel, sender: id) -> BOOL {
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trace_scope!("performDragOperation:");
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use cocoa::{appkit::NSPasteboard, foundation::NSFastEnumeration};
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use std::path::PathBuf;
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let pb: id = unsafe { msg_send![sender, draggingPasteboard] };
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let filenames = unsafe { NSPasteboard::propertyListForType(pb, appkit::NSFilenamesPboardType) };
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for file in unsafe { filenames.iter() } {
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use cocoa::foundation::NSString;
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use std::ffi::CStr;
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unsafe {
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let f = NSString::UTF8String(file);
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let path = CStr::from_ptr(f).to_string_lossy().into_owned();
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with_state(this, |state| {
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state.emit_event(WindowEvent::DroppedFile(PathBuf::from(path)));
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});
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}
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}
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YES
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}
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/// Invoked when the dragging operation is complete
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extern "C" fn conclude_drag_operation(_: &Object, _: Sel, _: id) {
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trace_scope!("concludeDragOperation:");
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}
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/// Invoked when the dragging operation is cancelled
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extern "C" fn dragging_exited(this: &Object, _: Sel, _: id) {
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trace_scope!("draggingExited:");
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with_state(this, |state| {
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state.emit_event(WindowEvent::HoveredFileCancelled)
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});
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}
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/// Invoked when before enter fullscreen
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extern "C" fn window_will_enter_fullscreen(this: &Object, _: Sel, _: id) {
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trace_scope!("windowWillEnterFullscreen:");
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with_state(this, |state| {
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state.with_window(|window| {
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let mut shared_state = window.lock_shared_state("window_will_enter_fullscreen");
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shared_state.maximized = window.is_zoomed();
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let fullscreen = shared_state.fullscreen.as_ref();
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match fullscreen {
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// Exclusive mode sets the state in `set_fullscreen` as the user
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// can't enter exclusive mode by other means (like the
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// fullscreen button on the window decorations)
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Some(Fullscreen::Exclusive(_)) => (),
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// `window_will_enter_fullscreen` was triggered and we're already
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// in fullscreen, so we must've reached here by `set_fullscreen`
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// as it updates the state
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Some(Fullscreen::Borderless(_)) => (),
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// Otherwise, we must've reached fullscreen by the user clicking
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// on the green fullscreen button. Update state!
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None => {
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let current_monitor = Some(window.current_monitor_inner());
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shared_state.fullscreen = Some(Fullscreen::Borderless(current_monitor))
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}
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}
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shared_state.in_fullscreen_transition = true;
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})
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});
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}
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/// Invoked when before exit fullscreen
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extern "C" fn window_will_exit_fullscreen(this: &Object, _: Sel, _: id) {
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trace_scope!("windowWillExitFullScreen:");
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with_state(this, |state| {
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state.with_window(|window| {
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let mut shared_state = window.lock_shared_state("window_will_exit_fullscreen");
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shared_state.in_fullscreen_transition = true;
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});
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});
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}
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extern "C" fn window_will_use_fullscreen_presentation_options(
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this: &Object,
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_: Sel,
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_: id,
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proposed_options: NSUInteger,
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) -> NSUInteger {
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trace_scope!("window:willUseFullScreenPresentationOptions:");
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// Generally, games will want to disable the menu bar and the dock. Ideally,
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// this would be configurable by the user. Unfortunately because of our
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// `CGShieldingWindowLevel() + 1` hack (see `set_fullscreen`), our window is
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// placed on top of the menu bar in exclusive fullscreen mode. This looks
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// broken so we always disable the menu bar in exclusive fullscreen. We may
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// still want to make this configurable for borderless fullscreen. Right now
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// we don't, for consistency. If we do, it should be documented that the
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// user-provided options are ignored in exclusive fullscreen.
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let mut options: NSUInteger = proposed_options;
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with_state(this, |state| {
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state.with_window(|window| {
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let shared_state =
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window.lock_shared_state("window_will_use_fullscreen_presentation_options");
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if let Some(Fullscreen::Exclusive(_)) = shared_state.fullscreen {
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options = (NSApplicationPresentationOptions::NSApplicationPresentationFullScreen
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| NSApplicationPresentationOptions::NSApplicationPresentationHideDock
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|
| NSApplicationPresentationOptions::NSApplicationPresentationHideMenuBar)
|
|
.bits();
|
|
}
|
|
})
|
|
});
|
|
|
|
options
|
|
}
|
|
|
|
/// Invoked when entered fullscreen
|
|
extern "C" fn window_did_enter_fullscreen(this: &Object, _: Sel, _: id) {
|
|
trace_scope!("windowDidEnterFullscreen:");
|
|
with_state(this, |state| {
|
|
state.initial_fullscreen = false;
|
|
state.with_window(|window| {
|
|
let mut shared_state = window.lock_shared_state("window_did_enter_fullscreen");
|
|
shared_state.in_fullscreen_transition = false;
|
|
let target_fullscreen = shared_state.target_fullscreen.take();
|
|
drop(shared_state);
|
|
if let Some(target_fullscreen) = target_fullscreen {
|
|
window.set_fullscreen(target_fullscreen);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
/// Invoked when exited fullscreen
|
|
extern "C" fn window_did_exit_fullscreen(this: &Object, _: Sel, _: id) {
|
|
trace_scope!("windowDidExitFullscreen:");
|
|
|
|
with_state(this, |state| {
|
|
state.with_window(|window| {
|
|
window.restore_state_from_fullscreen();
|
|
let mut shared_state = window.lock_shared_state("window_did_exit_fullscreen");
|
|
shared_state.in_fullscreen_transition = false;
|
|
let target_fullscreen = shared_state.target_fullscreen.take();
|
|
drop(shared_state);
|
|
if let Some(target_fullscreen) = target_fullscreen {
|
|
window.set_fullscreen(target_fullscreen);
|
|
}
|
|
})
|
|
});
|
|
}
|
|
|
|
/// Invoked when fail to enter fullscreen
|
|
///
|
|
/// When this window launch from a fullscreen app (e.g. launch from VS Code
|
|
/// terminal), it creates a new virtual destkop and a transition animation.
|
|
/// This animation takes one second and cannot be disable without
|
|
/// elevated privileges. In this animation time, all toggleFullscreen events
|
|
/// will be failed. In this implementation, we will try again by using
|
|
/// performSelector:withObject:afterDelay: until window_did_enter_fullscreen.
|
|
/// It should be fine as we only do this at initialzation (i.e with_fullscreen
|
|
/// was set).
|
|
///
|
|
/// From Apple doc:
|
|
/// In some cases, the transition to enter full-screen mode can fail,
|
|
/// due to being in the midst of handling some other animation or user gesture.
|
|
/// This method indicates that there was an error, and you should clean up any
|
|
/// work you may have done to prepare to enter full-screen mode.
|
|
extern "C" fn window_did_fail_to_enter_fullscreen(this: &Object, _: Sel, _: id) {
|
|
trace_scope!("windowDidFailToEnterFullscreen:");
|
|
with_state(this, |state| {
|
|
state.with_window(|window| {
|
|
let mut shared_state = window.lock_shared_state("window_did_fail_to_enter_fullscreen");
|
|
shared_state.in_fullscreen_transition = false;
|
|
shared_state.target_fullscreen = None;
|
|
});
|
|
if state.initial_fullscreen {
|
|
unsafe {
|
|
let _: () = msg_send![*state.ns_window,
|
|
performSelector:sel!(toggleFullScreen:)
|
|
withObject:nil
|
|
afterDelay: 0.5
|
|
];
|
|
};
|
|
} else {
|
|
state.with_window(|window| window.restore_state_from_fullscreen());
|
|
}
|
|
});
|
|
}
|
|
|
|
// Invoked when the occlusion state of the window changes
|
|
extern "C" fn window_did_change_occlusion_state(this: &Object, _: Sel, _: id) {
|
|
trace_scope!("windowDidChangeOcclusionState:");
|
|
unsafe {
|
|
with_state(this, |state| {
|
|
state.emit_event(WindowEvent::Occluded(
|
|
!state
|
|
.ns_window
|
|
.occlusionState()
|
|
.contains(NSWindowOcclusionState::NSWindowOcclusionStateVisible),
|
|
))
|
|
});
|
|
}
|
|
}
|