tenant.openagents/omega

1#![deny(unsafe_op_in_unsafe_fn)]
2
3use std::{
4    cell::{Cell, RefCell},
5    num::NonZeroIsize,
6    path::PathBuf,
7    rc::{Rc, Weak},
8    str::FromStr,
9    sync::{Arc, Once, atomic::AtomicBool},
10    time::{Duration, Instant},
11};
12
13use anyhow::{Context as _, Result};
14use futures::channel::oneshot::{self, Receiver};
15use gpui_util::ResultExt;
16use raw_window_handle as rwh;
17use smallvec::SmallVec;
18use windows::{
19    Win32::{
20        Foundation::*,
21        Graphics::Dwm::*,
22        Graphics::Gdi::*,
23        System::{
24            Com::*, Diagnostics::Debug::MessageBeep, LibraryLoader::*, Ole::*, SystemServices::*,
25        },
26        UI::{Controls::*, HiDpi::*, Input::KeyboardAndMouse::*, Shell::*, WindowsAndMessaging::*},
27    },
28    core::*,
29};
30
31use crate::direct_manipulation::DirectManipulationHandler;
32use crate::*;
33use gpui::*;
34
35pub(crate) struct WindowsWindow(pub Rc<WindowsWindowInner>);
36
37impl std::ops::Deref for WindowsWindow {
38    type Target = WindowsWindowInner;
39
40    fn deref(&self) -> &Self::Target {
41        &self.0
42    }
43}
44
45pub struct WindowsWindowState {
46    pub origin: Cell<Point<Pixels>>,
47    pub logical_size: Cell<Size<Pixels>>,
48    pub min_size: Option<Size<Pixels>>,
49    pub fullscreen_restore_bounds: Cell<Bounds<Pixels>>,
50    pub border_offset: WindowBorderOffset,
51    pub appearance: Cell<WindowAppearance>,
52    pub background_appearance: Cell<WindowBackgroundAppearance>,
53    pub scale_factor: Cell<f32>,
54    pub restore_from_minimized: Cell<Option<Box<dyn FnMut(RequestFrameOptions)>>>,
55
56    pub callbacks: Callbacks,
57    pub input_handler: Cell<Option<PlatformInputHandler>>,
58    pub ime_enabled: Cell<bool>,
59    pub pending_surrogate: Cell<Option<u16>>,
60    pub last_reported_modifiers: Cell<Option<Modifiers>>,
61    pub last_reported_capslock: Cell<Option<Capslock>>,
62    pub hovered: Cell<bool>,
63    pub direct_manipulation: DirectManipulationHandler,
64
65    pub renderer: RefCell<DirectXRenderer>,
66    /// Set when the next `draw_window` call must be treated as a forced
67    /// render. Used after a GPU device-lost recovery, where the next frame
68    /// must both re-enable drawing (via `mark_drawable`) and bypass the GPUI
69    /// view cache (which would otherwise replay stale atlas tile references
70    /// from the previous frame and panic in `DirectXAtlasState::texture`),
71    /// and when a forced render was requested while another draw was in
72    /// progress and had to be deferred.
73    pub force_render_pending: Cell<bool>,
74
75    pub click_state: ClickState,
76    pub current_cursor: Cell<Option<HCURSOR>>,
77    /// Shared with [`WindowsPlatformState::cursor_visible`].
78    pub cursor_visible: Arc<AtomicBool>,
79    pub nc_button_pressed: Cell<Option<u32>>,
80
81    pub display: Cell<WindowsDisplay>,
82    /// Flag to instruct the `VSyncProvider` thread to invalidate the directx devices
83    /// as resizing them has failed, causing us to have lost at least the render target.
84    pub invalidate_devices: Arc<AtomicBool>,
85    /// Shared with [`WindowsPlatformState::draw_coordinator`] and every other window.
86    pub(crate) draw_coordinator: Rc<DrawCoordinator>,
87    fullscreen: Cell<Option<StyleAndBounds>>,
88    initial_placement: Cell<Option<WindowOpenStatus>>,
89    hwnd: HWND,
90    pub(crate) a11y: RefCell<Option<A11yState>>,
91}
92
93pub(crate) struct WindowsWindowInner {
94    hwnd: HWND,
95    drop_target_helper: IDropTargetHelper,
96    pub(crate) state: WindowsWindowState,
97    system_settings: WindowsSystemSettings,
98    pub(crate) handle: AnyWindowHandle,
99    pub(crate) hide_title_bar: bool,
100    pub(crate) is_movable: bool,
101    pub(crate) is_resizable: bool,
102    pub(crate) is_minimizable: bool,
103    pub(crate) executor: ForegroundExecutor,
104    pub(crate) validation_number: usize,
105    pub(crate) main_receiver: PriorityQueueReceiver<RunnableVariant>,
106    pub(crate) platform_window_handle: HWND,
107    pub(crate) parent_hwnd: Option<HWND>,
108}
109
110impl WindowsWindowState {
111    fn new(
112        hwnd: HWND,
113        directx_devices: &DirectXDevices,
114        window_params: &CREATESTRUCTW,
115        current_cursor: Option<HCURSOR>,
116        cursor_visible: Arc<AtomicBool>,
117        display: WindowsDisplay,
118        min_size: Option<Size<Pixels>>,
119        appearance: WindowAppearance,
120        disable_direct_composition: bool,
121        invalidate_devices: Arc<AtomicBool>,
122        draw_coordinator: Rc<DrawCoordinator>,
123    ) -> Result<Self> {
124        let scale_factor = {
125            let monitor_dpi = unsafe { GetDpiForWindow(hwnd) } as f32;
126            monitor_dpi / USER_DEFAULT_SCREEN_DPI as f32
127        };
128        let origin = logical_point(window_params.x as f32, window_params.y as f32, scale_factor);
129        let logical_size = {
130            let physical_size = size(
131                DevicePixels(window_params.cx),
132                DevicePixels(window_params.cy),
133            );
134            physical_size.to_pixels(scale_factor)
135        };
136        let fullscreen_restore_bounds = Bounds {
137            origin,
138            size: logical_size,
139        };
140        let border_offset = WindowBorderOffset::default();
141        let restore_from_minimized = None;
142        let renderer = DirectXRenderer::new(hwnd, directx_devices, disable_direct_composition)
143            .context("Creating DirectX renderer")?;
144        let callbacks = Callbacks::default();
145        let input_handler = None;
146        let pending_surrogate = None;
147        let last_reported_modifiers = None;
148        let last_reported_capslock = None;
149        let hovered = false;
150        let click_state = ClickState::new();
151        let nc_button_pressed = None;
152        let fullscreen = None;
153        let initial_placement = None;
154
155        let direct_manipulation = DirectManipulationHandler::new(hwnd, scale_factor)
156            .context("initializing Direct Manipulation")?;
157
158        Ok(Self {
159            origin: Cell::new(origin),
160            logical_size: Cell::new(logical_size),
161            fullscreen_restore_bounds: Cell::new(fullscreen_restore_bounds),
162            border_offset,
163            appearance: Cell::new(appearance),
164            background_appearance: Cell::new(WindowBackgroundAppearance::Opaque),
165            scale_factor: Cell::new(scale_factor),
166            restore_from_minimized: Cell::new(restore_from_minimized),
167            min_size,
168            callbacks,
169            input_handler: Cell::new(input_handler),
170            ime_enabled: Cell::new(true),
171            pending_surrogate: Cell::new(pending_surrogate),
172            last_reported_modifiers: Cell::new(last_reported_modifiers),
173            last_reported_capslock: Cell::new(last_reported_capslock),
174            hovered: Cell::new(hovered),
175            renderer: RefCell::new(renderer),
176            force_render_pending: Cell::new(false),
177            click_state,
178            current_cursor: Cell::new(current_cursor),
179            cursor_visible,
180            nc_button_pressed: Cell::new(nc_button_pressed),
181            display: Cell::new(display),
182            fullscreen: Cell::new(fullscreen),
183            initial_placement: Cell::new(initial_placement),
184            hwnd,
185            invalidate_devices,
186            draw_coordinator,
187            direct_manipulation,
188            a11y: RefCell::new(None),
189        })
190    }
191
192    #[inline]
193    pub(crate) fn is_fullscreen(&self) -> bool {
194        self.fullscreen.get().is_some()
195    }
196
197    pub(crate) fn is_maximized(&self) -> bool {
198        !self.is_fullscreen() && unsafe { IsZoomed(self.hwnd) }.as_bool()
199    }
200
201    fn bounds(&self) -> Bounds<Pixels> {
202        Bounds {
203            origin: self.origin.get(),
204            size: self.logical_size.get(),
205        }
206    }
207
208    // Calculate the bounds used for saving and whether the window is maximized.
209    fn calculate_window_bounds(&self) -> (Bounds<Pixels>, bool) {
210        let placement = unsafe {
211            let mut placement = WINDOWPLACEMENT {
212                length: std::mem::size_of::<WINDOWPLACEMENT>() as u32,
213                ..Default::default()
214            };
215            GetWindowPlacement(self.hwnd, &mut placement)
216                .context("failed to get window placement")
217                .log_err();
218            placement
219        };
220        (
221            calculate_client_rect(
222                placement.rcNormalPosition,
223                &self.border_offset,
224                self.scale_factor.get(),
225            ),
226            placement.showCmd == SW_SHOWMAXIMIZED.0 as u32,
227        )
228    }
229
230    fn window_bounds(&self) -> WindowBounds {
231        let (bounds, maximized) = self.calculate_window_bounds();
232
233        if self.is_fullscreen() {
234            WindowBounds::Fullscreen(self.fullscreen_restore_bounds.get())
235        } else if maximized {
236            WindowBounds::Maximized(bounds)
237        } else {
238            WindowBounds::Windowed(bounds)
239        }
240    }
241
242    /// get the logical size of the app's drawable area.
243    ///
244    /// Currently, GPUI uses the logical size of the app to handle mouse interactions (such as
245    /// whether the mouse collides with other elements of GPUI).
246    fn content_size(&self) -> Size<Pixels> {
247        self.logical_size.get()
248    }
249}
250
251impl WindowsWindowInner {
252    fn new(context: &mut WindowCreateContext, hwnd: HWND, cs: &CREATESTRUCTW) -> Result<Rc<Self>> {
253        let state = WindowsWindowState::new(
254            hwnd,
255            &context.directx_devices,
256            cs,
257            context.current_cursor,
258            context.cursor_visible.clone(),
259            context.display,
260            context.min_size,
261            context.appearance,
262            context.disable_direct_composition,
263            context.invalidate_devices.clone(),
264            context.draw_coordinator.clone(),
265        )?;
266
267        Ok(Rc::new(Self {
268            hwnd,
269            drop_target_helper: context.drop_target_helper.clone(),
270            state,
271            handle: context.handle,
272            hide_title_bar: context.hide_title_bar,
273            is_movable: context.is_movable,
274            is_resizable: context.is_resizable,
275            is_minimizable: context.is_minimizable,
276            executor: context.executor.clone(),
277            validation_number: context.validation_number,
278            main_receiver: context.main_receiver.clone(),
279            platform_window_handle: context.platform_window_handle,
280            system_settings: WindowsSystemSettings::new(),
281            parent_hwnd: context.parent_hwnd,
282        }))
283    }
284
285    fn toggle_fullscreen(self: &Rc<Self>) {
286        let this = self.clone();
287        self.executor
288            .spawn(async move {
289                let StyleAndBounds {
290                    style,
291                    x,
292                    y,
293                    cx,
294                    cy,
295                } = match this.state.fullscreen.take() {
296                    Some(state) => state,
297                    None => {
298                        let (window_bounds, _) = this.state.calculate_window_bounds();
299                        this.state.fullscreen_restore_bounds.set(window_bounds);
300
301                        let style =
302                            WINDOW_STYLE(unsafe { get_window_long(this.hwnd, GWL_STYLE) } as _);
303                        let mut rc = RECT::default();
304                        unsafe { GetWindowRect(this.hwnd, &mut rc) }
305                            .context("failed to get window rect")
306                            .log_err();
307                        let _ = this.state.fullscreen.set(Some(StyleAndBounds {
308                            style,
309                            x: rc.left,
310                            y: rc.top,
311                            cx: rc.right - rc.left,
312                            cy: rc.bottom - rc.top,
313                        }));
314                        let style = style
315                            & !(WS_THICKFRAME
316                                | WS_SYSMENU
317                                | WS_MAXIMIZEBOX
318                                | WS_MINIMIZEBOX
319                                | WS_CAPTION);
320                        let physical_bounds = this.state.display.get().physical_bounds();
321                        StyleAndBounds {
322                            style,
323                            x: physical_bounds.left().0,
324                            y: physical_bounds.top().0,
325                            cx: physical_bounds.size.width.0,
326                            cy: physical_bounds.size.height.0,
327                        }
328                    }
329                };
330                set_non_rude_hwnd(this.hwnd, !this.state.is_fullscreen());
331                unsafe { set_window_long(this.hwnd, GWL_STYLE, style.0 as isize) };
332                unsafe {
333                    SetWindowPos(
334                        this.hwnd,
335                        None,
336                        x,
337                        y,
338                        cx,
339                        cy,
340                        SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOZORDER,
341                    )
342                }
343                .log_err();
344            })
345            .detach();
346    }
347
348    fn set_window_placement(self: &Rc<Self>) -> Result<()> {
349        let Some(open_status) = self.state.initial_placement.take() else {
350            return Ok(());
351        };
352        match open_status.state {
353            WindowOpenState::Maximized => unsafe {
354                SetWindowPlacement(self.hwnd, &open_status.placement)
355                    .context("failed to set window placement")?;
356                ShowWindowAsync(self.hwnd, SW_MAXIMIZE).ok()?;
357            },
358            WindowOpenState::Fullscreen => {
359                unsafe {
360                    SetWindowPlacement(self.hwnd, &open_status.placement)
361                        .context("failed to set window placement")?
362                };
363                self.toggle_fullscreen();
364            }
365            WindowOpenState::Windowed => unsafe {
366                SetWindowPlacement(self.hwnd, &open_status.placement)
367                    .context("failed to set window placement")?;
368            },
369        }
370        Ok(())
371    }
372
373    pub(crate) fn system_settings(&self) -> &WindowsSystemSettings {
374        &self.system_settings
375    }
376}
377
378#[derive(Default)]
379pub(crate) struct Callbacks {
380    pub(crate) request_frame: Cell<Option<Box<dyn FnMut(RequestFrameOptions)>>>,
381    pub(crate) input: Cell<Option<Box<dyn FnMut(PlatformInput) -> DispatchEventResult>>>,
382    pub(crate) active_status_change: Cell<Option<Box<dyn FnMut(bool)>>>,
383    pub(crate) hovered_status_change: Cell<Option<Box<dyn FnMut(bool)>>>,
384    pub(crate) resize: Cell<Option<Box<dyn FnMut(Size<Pixels>, f32)>>>,
385    pub(crate) moved: Cell<Option<Box<dyn FnMut()>>>,
386    pub(crate) should_close: Cell<Option<Box<dyn FnMut() -> bool>>>,
387    pub(crate) close: Cell<Option<Box<dyn FnOnce()>>>,
388    pub(crate) hit_test_window_control: Cell<Option<Box<dyn FnMut() -> Option<WindowControlArea>>>>,
389    pub(crate) appearance_changed: Cell<Option<Box<dyn FnMut()>>>,
390}
391
392struct WindowCreateContext {
393    inner: Option<Result<Rc<WindowsWindowInner>>>,
394    handle: AnyWindowHandle,
395    hide_title_bar: bool,
396    display: WindowsDisplay,
397    is_movable: bool,
398    is_resizable: bool,
399    is_minimizable: bool,
400    min_size: Option<Size<Pixels>>,
401    executor: ForegroundExecutor,
402    current_cursor: Option<HCURSOR>,
403    cursor_visible: Arc<AtomicBool>,
404    drop_target_helper: IDropTargetHelper,
405    validation_number: usize,
406    main_receiver: PriorityQueueReceiver<RunnableVariant>,
407    platform_window_handle: HWND,
408    appearance: WindowAppearance,
409    disable_direct_composition: bool,
410    directx_devices: DirectXDevices,
411    invalidate_devices: Arc<AtomicBool>,
412    draw_coordinator: Rc<DrawCoordinator>,
413    parent_hwnd: Option<HWND>,
414}
415
416impl WindowsWindow {
417    pub(crate) fn new(
418        handle: AnyWindowHandle,
419        params: WindowParams,
420        creation_info: WindowCreationInfo,
421    ) -> Result<Self> {
422        // Native popups are not implemented on Windows yet. Rejecting lets callers fall back to
423        // gpui's in-window popovers.
424        if let WindowKind::AnchoredPopup(_) = params.kind {
425            return Err(popup::PopupNotSupportedError.into());
426        }
427
428        let WindowCreationInfo {
429            icon,
430            executor,
431            current_cursor,
432            cursor_visible,
433            drop_target_helper,
434            validation_number,
435            main_receiver,
436            platform_window_handle,
437            disable_direct_composition,
438            directx_devices,
439            invalidate_devices,
440            draw_coordinator,
441        } = creation_info;
442        register_window_class(icon);
443        let parent_hwnd = if params.kind == WindowKind::Dialog {
444            let parent_window = unsafe { GetActiveWindow() };
445            if parent_window.is_invalid() {
446                None
447            } else {
448                // Disable the parent window to make this dialog modal
449                unsafe {
450                    EnableWindow(parent_window, false).as_bool();
451                };
452                Some(parent_window)
453            }
454        } else {
455            None
456        };
457        let hide_title_bar = params
458            .titlebar
459            .as_ref()
460            .map(|titlebar| titlebar.appears_transparent)
461            .unwrap_or(true);
462        let window_name = HSTRING::from(
463            params
464                .titlebar
465                .as_ref()
466                .and_then(|titlebar| titlebar.title.as_ref())
467                .map(|title| title.as_ref())
468                .unwrap_or(""),
469        );
470
471        let (mut dwexstyle, dwstyle) = if params.kind == WindowKind::PopUp {
472            (WS_EX_TOOLWINDOW, WINDOW_STYLE(0x0))
473        } else {
474            let mut dwstyle = WS_SYSMENU;
475
476            if params.is_resizable {
477                dwstyle |= WS_THICKFRAME | WS_MAXIMIZEBOX;
478            }
479
480            if params.is_minimizable {
481                dwstyle |= WS_MINIMIZEBOX;
482            }
483            let dwexstyle = if params.kind == WindowKind::Dialog {
484                dwstyle |= WS_POPUP | WS_CAPTION;
485                WS_EX_DLGMODALFRAME
486            } else {
487                WS_EX_APPWINDOW
488            };
489
490            (dwexstyle, dwstyle)
491        };
492        if !disable_direct_composition {
493            dwexstyle |= WS_EX_NOREDIRECTIONBITMAP;
494        }
495
496        let hinstance = get_module_handle();
497        let display = if let Some(display_id) = params.display_id {
498            WindowsDisplay::new(display_id)
499        } else {
500            None
501        }
502        .or_else(WindowsDisplay::primary_monitor)
503        .context("failed to find any monitor")?;
504        let appearance = system_appearance().unwrap_or_default();
505        let mut context = WindowCreateContext {
506            inner: None,
507            handle,
508            hide_title_bar,
509            display,
510            is_movable: params.is_movable,
511            is_resizable: params.is_resizable,
512            is_minimizable: params.is_minimizable,
513            min_size: params.window_min_size,
514            executor,
515            current_cursor,
516            cursor_visible,
517            drop_target_helper,
518            validation_number,
519            main_receiver,
520            platform_window_handle,
521            appearance,
522            disable_direct_composition,
523            directx_devices,
524            invalidate_devices,
525            draw_coordinator,
526            parent_hwnd,
527        };
528        let creation_result = unsafe {
529            CreateWindowExW(
530                dwexstyle,
531                WINDOW_CLASS_NAME,
532                &window_name,
533                dwstyle,
534                CW_USEDEFAULT,
535                CW_USEDEFAULT,
536                CW_USEDEFAULT,
537                CW_USEDEFAULT,
538                parent_hwnd,
539                None,
540                Some(hinstance.into()),
541                Some(&context as *const _ as *const _),
542            )
543        };
544
545        // Failure to create a `WindowsWindowState` can cause window creation to fail,
546        // so check the inner result first.
547        let this = context.inner.take().transpose()?;
548        let hwnd = creation_result?;
549        let this = this.unwrap();
550
551        register_drag_drop(&this)?;
552        set_non_rude_hwnd(hwnd, true);
553        configure_dwm_dark_mode(hwnd, appearance);
554        this.state.border_offset.update(hwnd)?;
555        let placement = retrieve_window_placement(
556            hwnd,
557            display,
558            params.bounds,
559            this.state.scale_factor.get(),
560            &this.state.border_offset,
561        )?;
562        if params.show {
563            unsafe { SetWindowPlacement(hwnd, &placement)? };
564        } else {
565            this.state.initial_placement.set(Some(WindowOpenStatus {
566                placement,
567                state: WindowOpenState::Windowed,
568            }));
569        }
570
571        Ok(Self(this))
572    }
573}
574
575impl rwh::HasWindowHandle for WindowsWindow {
576    fn window_handle(&self) -> std::result::Result<rwh::WindowHandle<'_>, rwh::HandleError> {
577        let raw = rwh::Win32WindowHandle::new(unsafe {
578            NonZeroIsize::new_unchecked(self.0.hwnd.0 as isize)
579        })
580        .into();
581        Ok(unsafe { rwh::WindowHandle::borrow_raw(raw) })
582    }
583}
584
585impl rwh::HasDisplayHandle for WindowsWindow {
586    fn display_handle(&self) -> std::result::Result<rwh::DisplayHandle<'_>, rwh::HandleError> {
587        Ok(rwh::DisplayHandle::windows())
588    }
589}
590
591impl Drop for WindowsWindow {
592    fn drop(&mut self) {
593        // clone this `Rc` to prevent early release of the pointer
594        let this = self.0.clone();
595        self.0
596            .executor
597            .spawn(async move {
598                let handle = this.hwnd;
599                unsafe {
600                    RevokeDragDrop(handle).log_err();
601                    DestroyWindow(handle).log_err();
602                }
603            })
604            .detach();
605    }
606}
607
608impl PlatformWindow for WindowsWindow {
609    fn bounds(&self) -> Bounds<Pixels> {
610        self.state.bounds()
611    }
612
613    fn is_maximized(&self) -> bool {
614        self.state.is_maximized()
615    }
616
617    fn window_bounds(&self) -> WindowBounds {
618        self.state.window_bounds()
619    }
620
621    /// get the logical size of the app's drawable area.
622    ///
623    /// Currently, GPUI uses the logical size of the app to handle mouse interactions (such as
624    /// whether the mouse collides with other elements of GPUI).
625    fn content_size(&self) -> Size<Pixels> {
626        self.state.content_size()
627    }
628
629    fn resize(&mut self, size: Size<Pixels>) {
630        let hwnd = self.0.hwnd;
631        let bounds = gpui::bounds(self.bounds().origin, size).to_device_pixels(self.scale_factor());
632        let rect = calculate_window_rect(bounds, &self.state.border_offset);
633
634        self.0
635            .executor
636            .spawn(async move {
637                unsafe {
638                    SetWindowPos(
639                        hwnd,
640                        None,
641                        bounds.origin.x.0,
642                        bounds.origin.y.0,
643                        rect.right - rect.left,
644                        rect.bottom - rect.top,
645                        SWP_NOMOVE,
646                    )
647                    .context("unable to set window content size")
648                    .log_err();
649                }
650            })
651            .detach();
652    }
653
654    fn scale_factor(&self) -> f32 {
655        self.state.scale_factor.get()
656    }
657
658    fn appearance(&self) -> WindowAppearance {
659        self.state.appearance.get()
660    }
661
662    fn display(&self) -> Option<Rc<dyn PlatformDisplay>> {
663        Some(Rc::new(self.state.display.get()))
664    }
665
666    fn mouse_position(&self) -> Point<Pixels> {
667        let scale_factor = self.scale_factor();
668        let point = unsafe {
669            let mut point: POINT = std::mem::zeroed();
670            GetCursorPos(&mut point)
671                .context("unable to get cursor position")
672                .log_err();
673            ScreenToClient(self.0.hwnd, &mut point).ok().log_err();
674            point
675        };
676        logical_point(point.x as f32, point.y as f32, scale_factor)
677    }
678
679    fn modifiers(&self) -> Modifiers {
680        current_modifiers()
681    }
682
683    fn capslock(&self) -> Capslock {
684        current_capslock()
685    }
686
687    fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
688        self.state.input_handler.set(Some(input_handler));
689    }
690
691    fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
692        self.state.input_handler.take()
693    }
694
695    fn prompt(
696        &self,
697        level: PromptLevel,
698        msg: &str,
699        detail: Option<&str>,
700        answers: &[PromptButton],
701    ) -> Option<Receiver<usize>> {
702        let (done_tx, done_rx) = oneshot::channel();
703        let msg = msg.to_string();
704        let detail_string = detail.map(|detail| detail.to_string());
705        let handle = self.0.hwnd;
706        let answers = answers.to_vec();
707        self.0
708            .executor
709            .spawn(async move {
710                unsafe {
711                    let mut config = TASKDIALOGCONFIG::default();
712                    config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
713                    config.hwndParent = handle;
714                    let title;
715                    let main_icon;
716                    match level {
717                        PromptLevel::Info => {
718                            title = windows::core::w!("Info");
719                            main_icon = TD_INFORMATION_ICON;
720                        }
721                        PromptLevel::Warning => {
722                            title = windows::core::w!("Warning");
723                            main_icon = TD_WARNING_ICON;
724                        }
725                        PromptLevel::Critical => {
726                            title = windows::core::w!("Critical");
727                            main_icon = TD_ERROR_ICON;
728                        }
729                    };
730                    config.pszWindowTitle = title;
731                    config.Anonymous1.pszMainIcon = main_icon;
732                    let instruction = HSTRING::from(msg);
733                    config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
734                    let hints_encoded;
735                    if let Some(ref hints) = detail_string {
736                        hints_encoded = HSTRING::from(hints);
737                        config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
738                    };
739                    let mut button_id_map = Vec::with_capacity(answers.len());
740                    let mut buttons = Vec::new();
741                    let mut btn_encoded = Vec::new();
742                    for (index, btn) in answers.iter().enumerate() {
743                        let encoded = HSTRING::from(btn.label().as_ref());
744                        let button_id = match btn {
745                            PromptButton::Ok(_) => IDOK.0,
746                            PromptButton::Cancel(_) => IDCANCEL.0,
747                            // the first few low integer values are reserved for known buttons
748                            // so for simplicity we just go backwards from -1
749                            PromptButton::Other(_) => -(index as i32) - 1,
750                        };
751                        button_id_map.push(button_id);
752                        buttons.push(TASKDIALOG_BUTTON {
753                            nButtonID: button_id,
754                            pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
755                        });
756                        btn_encoded.push(encoded);
757                    }
758                    config.cButtons = buttons.len() as _;
759                    config.pButtons = buttons.as_ptr();
760
761                    config.pfCallback = None;
762                    let mut res = std::mem::zeroed();
763                    let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
764                        .context("unable to create task dialog")
765                        .log_err();
766
767                    if let Some(clicked) =
768                        button_id_map.iter().position(|&button_id| button_id == res)
769                    {
770                        let _ = done_tx.send(clicked);
771                    }
772                }
773            })
774            .detach();
775
776        Some(done_rx)
777    }
778
779    fn activate(&self) {
780        let hwnd = self.0.hwnd;
781        let this = self.0.clone();
782        self.0
783            .executor
784            .spawn(async move {
785                this.set_window_placement().log_err();
786
787                unsafe {
788                    // If the window is minimized, restore it.
789                    if IsIconic(hwnd).as_bool() {
790                        ShowWindowAsync(hwnd, SW_RESTORE).ok().log_err();
791                    }
792
793                    SetActiveWindow(hwnd).ok();
794                    SetFocus(Some(hwnd)).ok();
795                }
796
797                // premium ragebait by windows, this is needed because the window
798                // must have received an input event to be able to set itself to foreground
799                // so let's just simulate user input as that seems to be the most reliable way
800                // some more info: https://gist.github.com/Aetopia/1581b40f00cc0cadc93a0e8ccb65dc8c
801                // bonus: this bug also doesn't manifest if you have vs attached to the process
802                let inputs = [
803                    INPUT {
804                        r#type: INPUT_KEYBOARD,
805                        Anonymous: INPUT_0 {
806                            ki: KEYBDINPUT {
807                                wVk: VK_MENU,
808                                dwFlags: KEYBD_EVENT_FLAGS(0),
809                                ..Default::default()
810                            },
811                        },
812                    },
813                    INPUT {
814                        r#type: INPUT_KEYBOARD,
815                        Anonymous: INPUT_0 {
816                            ki: KEYBDINPUT {
817                                wVk: VK_MENU,
818                                dwFlags: KEYEVENTF_KEYUP,
819                                ..Default::default()
820                            },
821                        },
822                    },
823                ];
824                unsafe { SendInput(&inputs, std::mem::size_of::<INPUT>() as i32) };
825
826                // todo(windows)
827                // crate `windows 0.56` reports true as Err
828                unsafe { SetForegroundWindow(hwnd).as_bool() };
829            })
830            .detach();
831    }
832
833    fn request_attention(&self) {
834        if self.is_active() {
835            return;
836        }
837
838        let hwnd = self.0.hwnd;
839        self.0
840            .executor
841            .spawn(async move {
842                let info = FLASHWINFO {
843                    cbSize: std::mem::size_of::<FLASHWINFO>() as u32,
844                    hwnd,
845                    dwFlags: FLASHW_ALL | FLASHW_TIMERNOFG,
846                    uCount: 0,
847                    dwTimeout: 0,
848                };
849                unsafe { FlashWindowEx(&info).ok().log_err() };
850            })
851            .detach();
852    }
853
854    fn is_active(&self) -> bool {
855        self.0.hwnd == unsafe { GetActiveWindow() }
856    }
857
858    fn is_hovered(&self) -> bool {
859        self.state.hovered.get()
860    }
861
862    fn background_appearance(&self) -> WindowBackgroundAppearance {
863        self.state.background_appearance.get()
864    }
865
866    fn is_subpixel_rendering_supported(&self) -> bool {
867        true
868    }
869
870    fn set_title(&mut self, title: &str) {
871        unsafe { SetWindowTextW(self.0.hwnd, &HSTRING::from(title)) }
872            .inspect_err(|e| log::error!("Set title failed: {e}"))
873            .ok();
874    }
875
876    fn set_background_appearance(&self, background_appearance: WindowBackgroundAppearance) {
877        self.state.background_appearance.set(background_appearance);
878        let hwnd = self.0.hwnd;
879
880        // using Dwm APIs for Mica and MicaAlt backdrops.
881        // others follow the set_window_composition_attribute approach
882        match background_appearance {
883            WindowBackgroundAppearance::Opaque => {
884                set_window_composition_attribute(hwnd, None, 0);
885            }
886            WindowBackgroundAppearance::Transparent => {
887                set_window_composition_attribute(hwnd, None, 2);
888            }
889            WindowBackgroundAppearance::Blurred => {
890                set_window_composition_attribute(hwnd, Some((0, 0, 0, 0)), 4);
891            }
892            WindowBackgroundAppearance::MicaBackdrop => {
893                // DWMSBT_MAINWINDOW => MicaBase
894                dwm_set_window_composition_attribute(hwnd, 2);
895            }
896            WindowBackgroundAppearance::MicaAltBackdrop => {
897                // DWMSBT_TABBEDWINDOW => MicaAlt
898                dwm_set_window_composition_attribute(hwnd, 4);
899            }
900        }
901    }
902
903    fn minimize(&self) {
904        unsafe { ShowWindowAsync(self.0.hwnd, SW_MINIMIZE).ok().log_err() };
905    }
906
907    fn zoom(&self) {
908        unsafe {
909            if IsWindowVisible(self.0.hwnd).as_bool() {
910                ShowWindowAsync(self.0.hwnd, SW_MAXIMIZE).ok().log_err();
911            } else if let Some(mut status) = self.state.initial_placement.take() {
912                status.state = WindowOpenState::Maximized;
913                self.state.initial_placement.set(Some(status));
914            }
915        }
916    }
917
918    fn toggle_fullscreen(&self) {
919        if unsafe { IsWindowVisible(self.0.hwnd).as_bool() } {
920            self.0.toggle_fullscreen();
921        } else if let Some(mut status) = self.state.initial_placement.take() {
922            status.state = WindowOpenState::Fullscreen;
923            self.state.initial_placement.set(Some(status));
924        }
925    }
926
927    fn is_fullscreen(&self) -> bool {
928        self.state.is_fullscreen()
929    }
930
931    fn on_request_frame(&self, callback: Box<dyn FnMut(RequestFrameOptions)>) {
932        self.state.callbacks.request_frame.set(Some(callback));
933    }
934
935    fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> DispatchEventResult>) {
936        self.state.callbacks.input.set(Some(callback));
937    }
938
939    fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
940        self.0
941            .state
942            .callbacks
943            .active_status_change
944            .set(Some(callback));
945    }
946
947    fn on_hover_status_change(&self, callback: Box<dyn FnMut(bool)>) {
948        self.0
949            .state
950            .callbacks
951            .hovered_status_change
952            .set(Some(callback));
953    }
954
955    fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
956        self.state.callbacks.resize.set(Some(callback));
957    }
958
959    fn on_moved(&self, callback: Box<dyn FnMut()>) {
960        self.state.callbacks.moved.set(Some(callback));
961    }
962
963    fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
964        self.state.callbacks.should_close.set(Some(callback));
965    }
966
967    fn on_close(&self, callback: Box<dyn FnOnce()>) {
968        self.state.callbacks.close.set(Some(callback));
969    }
970
971    fn on_hit_test_window_control(&self, callback: Box<dyn FnMut() -> Option<WindowControlArea>>) {
972        self.0
973            .state
974            .callbacks
975            .hit_test_window_control
976            .set(Some(callback));
977    }
978
979    fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
980        self.0
981            .state
982            .callbacks
983            .appearance_changed
984            .set(Some(callback));
985    }
986
987    fn draw(&self, scene: &Scene) {
988        self.state
989            .renderer
990            .borrow_mut()
991            .draw(scene, self.state.background_appearance.get())
992            .log_err();
993    }
994
995    fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
996        self.state.renderer.borrow().sprite_atlas()
997    }
998
999    fn get_raw_handle(&self) -> HWND {
1000        self.0.hwnd
1001    }
1002
1003    fn gpu_specs(&self) -> Option<GpuSpecs> {
1004        self.state.renderer.borrow().gpu_specs().log_err()
1005    }
1006
1007    fn update_ime_position(&self, bounds: Bounds<Pixels>) {
1008        let scale_factor = self.state.scale_factor.get();
1009        let caret_position = POINT {
1010            x: (bounds.origin.x.as_f32() * scale_factor) as i32,
1011            y: (bounds.origin.y.as_f32() * scale_factor) as i32
1012                + ((bounds.size.height.as_f32() * scale_factor) as i32 / 2),
1013        };
1014
1015        self.0.update_ime_position(self.0.hwnd, caret_position);
1016    }
1017
1018    fn play_system_bell(&self) {
1019        // MB_OK: The sound specified as the Windows Default Beep sound.
1020        let _ = unsafe { MessageBeep(MB_OK) };
1021    }
1022
1023    fn a11y_init(&self, callbacks: gpui::A11yCallbacks) {
1024        let action_handler = A11yActionHandler(callbacks.action);
1025        let is_focused = unsafe { GetForegroundWindow() } == self.0.hwnd;
1026
1027        let adapter = accesskit_windows::Adapter::new(
1028            accesskit_windows::HWND(self.0.hwnd.0),
1029            is_focused,
1030            action_handler,
1031        );
1032
1033        let activation_handler = A11yActivationHandler {
1034            callback: callbacks.activation,
1035        };
1036
1037        *self.state.a11y.borrow_mut() = Some(A11yState {
1038            adapter,
1039            activation_handler,
1040        });
1041    }
1042
1043    fn a11y_tree_update(&self, tree_update: accesskit::TreeUpdate) {
1044        let events = {
1045            let mut a11y = self.state.a11y.borrow_mut();
1046            a11y.as_mut()
1047                .and_then(|a11y| a11y.adapter.update_if_active(|| tree_update))
1048        };
1049        // The borrow must be dropped before raising events, because
1050        // `events.raise()` calls `UiaRaiseAutomationPropertyChangedEvent`
1051        // which may send a nested `WM_GETOBJECT` back into this window
1052        // procedure, re-entering `handle_wm_getobject` which also borrows
1053        // `self.state.a11y`.
1054        if let Some(events) = events {
1055            events.raise();
1056        }
1057    }
1058
1059    fn a11y_update_window_bounds(&self) {
1060        // Windows UIA handles window bounds tracking automatically.
1061    }
1062}
1063
1064pub(crate) struct A11yState {
1065    pub(crate) adapter: accesskit_windows::Adapter,
1066    pub(crate) activation_handler: A11yActivationHandler,
1067}
1068
1069pub(crate) struct A11yActivationHandler {
1070    callback: Box<dyn Fn() -> Option<accesskit::TreeUpdate> + Send + 'static>,
1071}
1072
1073impl accesskit::ActivationHandler for A11yActivationHandler {
1074    fn request_initial_tree(&mut self) -> Option<accesskit::TreeUpdate> {
1075        (self.callback)()
1076    }
1077}
1078
1079struct A11yActionHandler(Box<dyn Fn(accesskit::ActionRequest) + Send + 'static>);
1080
1081impl accesskit::ActionHandler for A11yActionHandler {
1082    fn do_action(&mut self, request: accesskit::ActionRequest) {
1083        (self.0)(request);
1084    }
1085}
1086
1087#[implement(IDropTarget)]
1088struct WindowsDragDropHandler(pub Rc<WindowsWindowInner>);
1089
1090impl WindowsDragDropHandler {
1091    fn handle_drag_drop(&self, input: PlatformInput) {
1092        if let Some(mut func) = self.0.state.callbacks.input.take() {
1093            func(input);
1094            self.0.state.callbacks.input.set(Some(func));
1095        }
1096    }
1097}
1098
1099#[allow(non_snake_case)]
1100impl IDropTarget_Impl for WindowsDragDropHandler_Impl {
1101    fn DragEnter(
1102        &self,
1103        pdataobj: windows::core::Ref<IDataObject>,
1104        _grfkeystate: MODIFIERKEYS_FLAGS,
1105        pt: &POINTL,
1106        pdweffect: *mut DROPEFFECT,
1107    ) -> windows::core::Result<()> {
1108        unsafe {
1109            let idata_obj = pdataobj.ok()?;
1110            let config = FORMATETC {
1111                cfFormat: CF_HDROP.0,
1112                ptd: std::ptr::null_mut() as _,
1113                dwAspect: DVASPECT_CONTENT.0,
1114                lindex: -1,
1115                tymed: TYMED_HGLOBAL.0 as _,
1116            };
1117            let cursor_position = POINT { x: pt.x, y: pt.y };
1118            if idata_obj.QueryGetData(&config as _) == S_OK {
1119                *pdweffect = DROPEFFECT_COPY;
1120                let Some(mut idata) = idata_obj.GetData(&config as _).log_err() else {
1121                    return Ok(());
1122                };
1123                if idata.u.hGlobal.is_invalid() {
1124                    return Ok(());
1125                }
1126                let hdrop = HDROP(idata.u.hGlobal.0);
1127                let mut paths = SmallVec::<[PathBuf; 2]>::new();
1128                with_file_names(hdrop, |file_name| {
1129                    if let Some(path) = PathBuf::from_str(&file_name).log_err() {
1130                        paths.push(path);
1131                    }
1132                });
1133                ReleaseStgMedium(&mut idata);
1134                let mut cursor_position = cursor_position;
1135                ScreenToClient(self.0.hwnd, &mut cursor_position)
1136                    .ok()
1137                    .log_err();
1138                let scale_factor = self.0.state.scale_factor.get();
1139                let input = PlatformInput::FileDrop(FileDropEvent::Entered {
1140                    position: logical_point(
1141                        cursor_position.x as f32,
1142                        cursor_position.y as f32,
1143                        scale_factor,
1144                    ),
1145                    paths: ExternalPaths(paths),
1146                });
1147                self.handle_drag_drop(input);
1148            } else {
1149                *pdweffect = DROPEFFECT_NONE;
1150            }
1151            self.0
1152                .drop_target_helper
1153                .DragEnter(self.0.hwnd, idata_obj, &cursor_position, *pdweffect)
1154                .log_err();
1155        }
1156        Ok(())
1157    }
1158
1159    fn DragOver(
1160        &self,
1161        _grfkeystate: MODIFIERKEYS_FLAGS,
1162        pt: &POINTL,
1163        pdweffect: *mut DROPEFFECT,
1164    ) -> windows::core::Result<()> {
1165        let mut cursor_position = POINT { x: pt.x, y: pt.y };
1166        unsafe {
1167            *pdweffect = DROPEFFECT_COPY;
1168            self.0
1169                .drop_target_helper
1170                .DragOver(&cursor_position, *pdweffect)
1171                .log_err();
1172            ScreenToClient(self.0.hwnd, &mut cursor_position)
1173                .ok()
1174                .log_err();
1175        }
1176        let scale_factor = self.0.state.scale_factor.get();
1177        let input = PlatformInput::FileDrop(FileDropEvent::Pending {
1178            position: logical_point(
1179                cursor_position.x as f32,
1180                cursor_position.y as f32,
1181                scale_factor,
1182            ),
1183        });
1184        self.handle_drag_drop(input);
1185
1186        Ok(())
1187    }
1188
1189    fn DragLeave(&self) -> windows::core::Result<()> {
1190        unsafe {
1191            self.0.drop_target_helper.DragLeave().log_err();
1192        }
1193        let input = PlatformInput::FileDrop(FileDropEvent::Exited);
1194        self.handle_drag_drop(input);
1195
1196        Ok(())
1197    }
1198
1199    fn Drop(
1200        &self,
1201        pdataobj: windows::core::Ref<IDataObject>,
1202        _grfkeystate: MODIFIERKEYS_FLAGS,
1203        pt: &POINTL,
1204        pdweffect: *mut DROPEFFECT,
1205    ) -> windows::core::Result<()> {
1206        let idata_obj = pdataobj.ok()?;
1207        let mut cursor_position = POINT { x: pt.x, y: pt.y };
1208        unsafe {
1209            *pdweffect = DROPEFFECT_COPY;
1210            self.0
1211                .drop_target_helper
1212                .Drop(idata_obj, &cursor_position, *pdweffect)
1213                .log_err();
1214            ScreenToClient(self.0.hwnd, &mut cursor_position)
1215                .ok()
1216                .log_err();
1217        }
1218        let scale_factor = self.0.state.scale_factor.get();
1219        let input = PlatformInput::FileDrop(FileDropEvent::Submit {
1220            position: logical_point(
1221                cursor_position.x as f32,
1222                cursor_position.y as f32,
1223                scale_factor,
1224            ),
1225        });
1226        self.handle_drag_drop(input);
1227
1228        Ok(())
1229    }
1230}
1231
1232#[derive(Debug, Clone)]
1233pub(crate) struct ClickState {
1234    button: Cell<MouseButton>,
1235    last_click: Cell<Instant>,
1236    last_position: Cell<Point<DevicePixels>>,
1237    double_click_spatial_tolerance_width: Cell<i32>,
1238    double_click_spatial_tolerance_height: Cell<i32>,
1239    double_click_interval: Cell<Duration>,
1240    pub(crate) current_count: Cell<usize>,
1241}
1242
1243impl ClickState {
1244    pub fn new() -> Self {
1245        let double_click_spatial_tolerance_width = unsafe { GetSystemMetrics(SM_CXDOUBLECLK) };
1246        let double_click_spatial_tolerance_height = unsafe { GetSystemMetrics(SM_CYDOUBLECLK) };
1247        let double_click_interval = Duration::from_millis(unsafe { GetDoubleClickTime() } as u64);
1248
1249        ClickState {
1250            button: Cell::new(MouseButton::Left),
1251            last_click: Cell::new(Instant::now()),
1252            last_position: Cell::new(Point::default()),
1253            double_click_spatial_tolerance_width: Cell::new(double_click_spatial_tolerance_width),
1254            double_click_spatial_tolerance_height: Cell::new(double_click_spatial_tolerance_height),
1255            double_click_interval: Cell::new(double_click_interval),
1256            current_count: Cell::new(0),
1257        }
1258    }
1259
1260    /// update self and return the needed click count
1261    pub fn update(&self, button: MouseButton, new_position: Point<DevicePixels>) -> usize {
1262        if self.button.get() == button && self.is_double_click(new_position) {
1263            self.current_count.update(|it| it + 1);
1264        } else {
1265            self.current_count.set(1);
1266        }
1267        self.last_click.set(Instant::now());
1268        self.last_position.set(new_position);
1269        self.button.set(button);
1270
1271        self.current_count.get()
1272    }
1273
1274    pub fn system_update(&self, wparam: usize) {
1275        match wparam {
1276            // SPI_SETDOUBLECLKWIDTH
1277            29 => self
1278                .double_click_spatial_tolerance_width
1279                .set(unsafe { GetSystemMetrics(SM_CXDOUBLECLK) }),
1280            // SPI_SETDOUBLECLKHEIGHT
1281            30 => self
1282                .double_click_spatial_tolerance_height
1283                .set(unsafe { GetSystemMetrics(SM_CYDOUBLECLK) }),
1284            // SPI_SETDOUBLECLICKTIME
1285            32 => self
1286                .double_click_interval
1287                .set(Duration::from_millis(unsafe { GetDoubleClickTime() } as u64)),
1288            _ => {}
1289        }
1290    }
1291
1292    #[inline]
1293    fn is_double_click(&self, new_position: Point<DevicePixels>) -> bool {
1294        let diff = self.last_position.get() - new_position;
1295
1296        self.last_click.get().elapsed() < self.double_click_interval.get()
1297            && diff.x.0.abs() <= self.double_click_spatial_tolerance_width.get()
1298            && diff.y.0.abs() <= self.double_click_spatial_tolerance_height.get()
1299    }
1300}
1301
1302#[derive(Copy, Clone)]
1303struct StyleAndBounds {
1304    style: WINDOW_STYLE,
1305    x: i32,
1306    y: i32,
1307    cx: i32,
1308    cy: i32,
1309}
1310
1311#[repr(C)]
1312struct WINDOWCOMPOSITIONATTRIBDATA {
1313    attrib: u32,
1314    pv_data: *mut std::ffi::c_void,
1315    cb_data: usize,
1316}
1317
1318#[repr(C)]
1319struct AccentPolicy {
1320    accent_state: u32,
1321    accent_flags: u32,
1322    gradient_color: u32,
1323    animation_id: u32,
1324}
1325
1326type Color = (u8, u8, u8, u8);
1327
1328#[derive(Debug, Default, Clone)]
1329pub(crate) struct WindowBorderOffset {
1330    pub(crate) width_offset: Cell<i32>,
1331    pub(crate) height_offset: Cell<i32>,
1332}
1333
1334impl WindowBorderOffset {
1335    pub(crate) fn update(&self, hwnd: HWND) -> anyhow::Result<()> {
1336        let window_rect = unsafe {
1337            let mut rect = std::mem::zeroed();
1338            GetWindowRect(hwnd, &mut rect)?;
1339            rect
1340        };
1341        let client_rect = unsafe {
1342            let mut rect = std::mem::zeroed();
1343            GetClientRect(hwnd, &mut rect)?;
1344            rect
1345        };
1346        self.width_offset
1347            .set((window_rect.right - window_rect.left) - (client_rect.right - client_rect.left));
1348        self.height_offset
1349            .set((window_rect.bottom - window_rect.top) - (client_rect.bottom - client_rect.top));
1350        Ok(())
1351    }
1352}
1353
1354#[derive(Clone)]
1355struct WindowOpenStatus {
1356    placement: WINDOWPLACEMENT,
1357    state: WindowOpenState,
1358}
1359
1360#[derive(Clone, Copy)]
1361enum WindowOpenState {
1362    Maximized,
1363    Fullscreen,
1364    Windowed,
1365}
1366
1367const WINDOW_CLASS_NAME: PCWSTR = w!("Zed::Window");
1368
1369fn register_window_class(icon_handle: HICON) {
1370    static ONCE: Once = Once::new();
1371    ONCE.call_once(|| {
1372        let wc = WNDCLASSW {
1373            lpfnWndProc: Some(window_procedure),
1374            hIcon: icon_handle,
1375            lpszClassName: PCWSTR(WINDOW_CLASS_NAME.as_ptr()),
1376            style: CS_HREDRAW | CS_VREDRAW,
1377            hInstance: get_module_handle().into(),
1378            hbrBackground: unsafe { CreateSolidBrush(COLORREF(0x00000000)) },
1379            ..Default::default()
1380        };
1381        unsafe { RegisterClassW(&wc) };
1382    });
1383}
1384
1385unsafe extern "system" fn window_procedure(
1386    hwnd: HWND,
1387    msg: u32,
1388    wparam: WPARAM,
1389    lparam: LPARAM,
1390) -> LRESULT {
1391    if msg == WM_NCCREATE {
1392        let window_params = unsafe { &*(lparam.0 as *const CREATESTRUCTW) };
1393        let window_creation_context = window_params.lpCreateParams as *mut WindowCreateContext;
1394        let window_creation_context = unsafe { &mut *window_creation_context };
1395        return match WindowsWindowInner::new(window_creation_context, hwnd, window_params) {
1396            Ok(window_state) => {
1397                let weak = Box::new(Rc::downgrade(&window_state));
1398                unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
1399                window_creation_context.inner = Some(Ok(window_state));
1400                unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
1401            }
1402            Err(error) => {
1403                window_creation_context.inner = Some(Err(error));
1404                LRESULT(0)
1405            }
1406        };
1407    }
1408
1409    let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1410    if ptr.is_null() {
1411        return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
1412    }
1413    let inner = unsafe { &*ptr };
1414    let result = if let Some(inner) = inner.upgrade() {
1415        inner.handle_msg(hwnd, msg, wparam, lparam)
1416    } else {
1417        unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
1418    };
1419
1420    if msg == WM_NCDESTROY {
1421        unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
1422        unsafe { drop(Box::from_raw(ptr)) };
1423    }
1424
1425    result
1426}
1427
1428pub(crate) fn window_from_hwnd(hwnd: HWND) -> Option<Rc<WindowsWindowInner>> {
1429    if hwnd.is_invalid() {
1430        return None;
1431    }
1432
1433    let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1434    if !ptr.is_null() {
1435        let inner = unsafe { &*ptr };
1436        inner.upgrade()
1437    } else {
1438        None
1439    }
1440}
1441
1442fn get_module_handle() -> HMODULE {
1443    unsafe {
1444        let mut h_module = std::mem::zeroed();
1445        GetModuleHandleExW(
1446            GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
1447            windows::core::w!("ZedModule"),
1448            &mut h_module,
1449        )
1450        .expect("Unable to get module handle"); // this should never fail
1451
1452        h_module
1453    }
1454}
1455
1456fn register_drag_drop(window: &Rc<WindowsWindowInner>) -> Result<()> {
1457    let window_handle = window.hwnd;
1458    let handler = WindowsDragDropHandler(window.clone());
1459    // The lifetime of `IDropTarget` is handled by Windows, it won't release until
1460    // we call `RevokeDragDrop`.
1461    // So, it's safe to drop it here.
1462    let drag_drop_handler: IDropTarget = handler.into();
1463    unsafe {
1464        RegisterDragDrop(window_handle, &drag_drop_handler)
1465            .context("unable to register drag-drop event")?;
1466    }
1467    Ok(())
1468}
1469
1470fn calculate_window_rect(bounds: Bounds<DevicePixels>, border_offset: &WindowBorderOffset) -> RECT {
1471    // NOTE:
1472    // The reason we're not using `AdjustWindowRectEx()` here is
1473    // that the size reported by this function is incorrect.
1474    // You can test it, and there are similar discussions online.
1475    // See: https://stackoverflow.com/questions/12423584/how-to-set-exact-client-size-for-overlapped-window-winapi
1476    //
1477    // So we manually calculate these values here.
1478    let mut rect = RECT {
1479        left: bounds.left().0,
1480        top: bounds.top().0,
1481        right: bounds.right().0,
1482        bottom: bounds.bottom().0,
1483    };
1484    let left_offset = border_offset.width_offset.get() / 2;
1485    let top_offset = border_offset.height_offset.get() / 2;
1486    let right_offset = border_offset.width_offset.get() - left_offset;
1487    let bottom_offset = border_offset.height_offset.get() - top_offset;
1488    rect.left -= left_offset;
1489    rect.top -= top_offset;
1490    rect.right += right_offset;
1491    rect.bottom += bottom_offset;
1492    rect
1493}
1494
1495fn calculate_client_rect(
1496    rect: RECT,
1497    border_offset: &WindowBorderOffset,
1498    scale_factor: f32,
1499) -> Bounds<Pixels> {
1500    let left_offset = border_offset.width_offset.get() / 2;
1501    let top_offset = border_offset.height_offset.get() / 2;
1502    let right_offset = border_offset.width_offset.get() - left_offset;
1503    let bottom_offset = border_offset.height_offset.get() - top_offset;
1504    let left = rect.left + left_offset;
1505    let top = rect.top + top_offset;
1506    let right = rect.right - right_offset;
1507    let bottom = rect.bottom - bottom_offset;
1508    let physical_size = size(DevicePixels(right - left), DevicePixels(bottom - top));
1509    Bounds {
1510        origin: logical_point(left as f32, top as f32, scale_factor),
1511        size: physical_size.to_pixels(scale_factor),
1512    }
1513}
1514
1515fn retrieve_window_placement(
1516    hwnd: HWND,
1517    display: WindowsDisplay,
1518    initial_bounds: Bounds<Pixels>,
1519    scale_factor: f32,
1520    border_offset: &WindowBorderOffset,
1521) -> Result<WINDOWPLACEMENT> {
1522    let mut placement = WINDOWPLACEMENT {
1523        length: std::mem::size_of::<WINDOWPLACEMENT>() as u32,
1524        ..Default::default()
1525    };
1526    unsafe { GetWindowPlacement(hwnd, &mut placement)? };
1527    // the bounds may be not inside the display
1528    let bounds = if display.check_given_bounds(initial_bounds) {
1529        initial_bounds
1530    } else {
1531        display.default_bounds()
1532    };
1533    let bounds = bounds.to_device_pixels(scale_factor);
1534    placement.rcNormalPosition = calculate_window_rect(bounds, border_offset);
1535    Ok(placement)
1536}
1537
1538fn dwm_set_window_composition_attribute(hwnd: HWND, backdrop_type: u32) {
1539    let mut version = unsafe { std::mem::zeroed() };
1540    let status = unsafe { windows::Wdk::System::SystemServices::RtlGetVersion(&mut version) };
1541
1542    // DWMWA_SYSTEMBACKDROP_TYPE is available only on version 22621 or later
1543    // using SetWindowCompositionAttributeType as a fallback
1544    if !status.is_ok() || version.dwBuildNumber < 22621 {
1545        return;
1546    }
1547
1548    unsafe {
1549        let result = DwmSetWindowAttribute(
1550            hwnd,
1551            DWMWA_SYSTEMBACKDROP_TYPE,
1552            &backdrop_type as *const _ as *const _,
1553            std::mem::size_of_val(&backdrop_type) as u32,
1554        );
1555
1556        if !result.is_ok() {
1557            return;
1558        }
1559    }
1560}
1561
1562fn set_window_composition_attribute(hwnd: HWND, color: Option<Color>, state: u32) {
1563    let mut version = unsafe { std::mem::zeroed() };
1564    let status = unsafe { windows::Wdk::System::SystemServices::RtlGetVersion(&mut version) };
1565
1566    if !status.is_ok() || version.dwBuildNumber < 17763 {
1567        return;
1568    }
1569
1570    unsafe {
1571        type SetWindowCompositionAttributeType =
1572            unsafe extern "system" fn(HWND, *mut WINDOWCOMPOSITIONATTRIBDATA) -> BOOL;
1573        let module_name = PCSTR::from_raw(c"user32.dll".as_ptr() as *const u8);
1574        if let Some(user32) = GetModuleHandleA(module_name)
1575            .context("Unable to get user32.dll handle")
1576            .log_err()
1577        {
1578            let func_name = PCSTR::from_raw(c"SetWindowCompositionAttribute".as_ptr() as *const u8);
1579            let Some(raw_set_window_composition_attribute) = GetProcAddress(user32, func_name)
1580            else {
1581                return;
1582            };
1583            let set_window_composition_attribute: SetWindowCompositionAttributeType =
1584                std::mem::transmute(raw_set_window_composition_attribute);
1585            let mut color = color.unwrap_or_default();
1586            let is_acrylic = state == 4;
1587            if is_acrylic && color.3 == 0 {
1588                color.3 = 1;
1589            }
1590            let accent = AccentPolicy {
1591                accent_state: state,
1592                accent_flags: if is_acrylic { 0 } else { 2 },
1593                gradient_color: (color.0 as u32)
1594                    | ((color.1 as u32) << 8)
1595                    | ((color.2 as u32) << 16)
1596                    | ((color.3 as u32) << 24),
1597                animation_id: 0,
1598            };
1599            let mut data = WINDOWCOMPOSITIONATTRIBDATA {
1600                attrib: 0x13,
1601                pv_data: &accent as *const _ as *mut _,
1602                cb_data: std::mem::size_of::<AccentPolicy>(),
1603            };
1604            let _ = set_window_composition_attribute(hwnd, &mut data as *mut _ as _);
1605        }
1606    }
1607}
1608
1609// When the platform title bar is hidden, Windows may think that our application is meant to appear 'fullscreen'
1610// and will stop the taskbar from appearing on top of our window. Prevent this.
1611// https://devblogs.microsoft.com/oldnewthing/20250522-00/?p=111211
1612fn set_non_rude_hwnd(hwnd: HWND, non_rude: bool) {
1613    if non_rude {
1614        unsafe { SetPropW(hwnd, w!("NonRudeHWND"), Some(HANDLE(1 as _))) }.log_err();
1615    } else {
1616        unsafe { RemovePropW(hwnd, w!("NonRudeHWND")) }.log_err();
1617    }
1618}
1619
1620#[cfg(test)]
1621mod tests {
1622    use super::ClickState;
1623    use gpui::{DevicePixels, MouseButton, point};
1624    use std::time::Duration;
1625
1626    #[test]
1627    fn test_double_click_interval() {
1628        let state = ClickState::new();
1629        assert_eq!(
1630            state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1631            1
1632        );
1633        assert_eq!(
1634            state.update(MouseButton::Right, point(DevicePixels(0), DevicePixels(0))),
1635            1
1636        );
1637        assert_eq!(
1638            state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1639            1
1640        );
1641        assert_eq!(
1642            state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1643            2
1644        );
1645        state
1646            .last_click
1647            .update(|it| it - Duration::from_millis(700));
1648        assert_eq!(
1649            state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1650            1
1651        );
1652    }
1653
1654    #[test]
1655    fn test_double_click_spatial_tolerance() {
1656        let state = ClickState::new();
1657        assert_eq!(
1658            state.update(MouseButton::Left, point(DevicePixels(-3), DevicePixels(0))),
1659            1
1660        );
1661        assert_eq!(
1662            state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(3))),
1663            2
1664        );
1665        assert_eq!(
1666            state.update(MouseButton::Right, point(DevicePixels(3), DevicePixels(2))),
1667            1
1668        );
1669        assert_eq!(
1670            state.update(MouseButton::Right, point(DevicePixels(10), DevicePixels(0))),
1671            1
1672        );
1673    }
1674}
1675