1#![deny(unsafe_op_in_unsafe_fn)]
2
3use std::{
4 cell::RefCell,
5 num::NonZeroIsize,
6 path::PathBuf,
7 rc::{Rc, Weak},
8 str::FromStr,
9 sync::{Arc, Once},
10 time::{Duration, Instant},
11};
12
13use ::util::ResultExt;
14use anyhow::Context;
15use futures::channel::oneshot::{self, Receiver};
16use itertools::Itertools;
17use raw_window_handle as rwh;
18use smallvec::SmallVec;
19use windows::{
20 core::*,
21 Win32::{
22 Foundation::*,
23 Graphics::Gdi::*,
24 System::{Com::*, LibraryLoader::*, Ole::*, SystemServices::*},
25 UI::{Controls::*, HiDpi::*, Input::KeyboardAndMouse::*, Shell::*, WindowsAndMessaging::*},
26 },
27};
28
29use crate::platform::blade::BladeRenderer;
30use crate::*;
31
32pub(crate) struct WindowsWindow(pub Rc<WindowsWindowStatePtr>);
33
34pub struct WindowsWindowState {
35 pub origin: Point<Pixels>,
36 pub logical_size: Size<Pixels>,
37 pub fullscreen_restore_bounds: Bounds<Pixels>,
38 pub scale_factor: f32,
39
40 pub callbacks: Callbacks,
41 pub input_handler: Option<PlatformInputHandler>,
42
43 pub renderer: BladeRenderer,
44
45 pub click_state: ClickState,
46 pub system_settings: WindowsSystemSettings,
47 pub current_cursor: HCURSOR,
48 pub nc_button_pressed: Option<u32>,
49
50 pub display: WindowsDisplay,
51 fullscreen: Option<StyleAndBounds>,
52 hwnd: HWND,
53}
54
55pub(crate) struct WindowsWindowStatePtr {
56 hwnd: HWND,
57 pub(crate) state: RefCell<WindowsWindowState>,
58 pub(crate) handle: AnyWindowHandle,
59 pub(crate) hide_title_bar: bool,
60 pub(crate) executor: ForegroundExecutor,
61}
62
63impl WindowsWindowState {
64 fn new(
65 hwnd: HWND,
66 transparent: bool,
67 cs: &CREATESTRUCTW,
68 current_cursor: HCURSOR,
69 display: WindowsDisplay,
70 ) -> Self {
71 let scale_factor = {
72 let monitor_dpi = unsafe { GetDpiForWindow(hwnd) } as f32;
73 monitor_dpi / USER_DEFAULT_SCREEN_DPI as f32
74 };
75 let origin = logical_point(cs.x as f32, cs.y as f32, scale_factor);
76 let logical_size = {
77 let physical_size = size(DevicePixels(cs.cx), DevicePixels(cs.cy));
78 physical_size.to_pixels(scale_factor)
79 };
80 let fullscreen_restore_bounds = Bounds {
81 origin,
82 size: logical_size,
83 };
84 let renderer = windows_renderer::windows_renderer(hwnd, transparent);
85 let callbacks = Callbacks::default();
86 let input_handler = None;
87 let click_state = ClickState::new();
88 let system_settings = WindowsSystemSettings::new();
89 let nc_button_pressed = None;
90 let fullscreen = None;
91
92 Self {
93 origin,
94 logical_size,
95 fullscreen_restore_bounds,
96 scale_factor,
97 callbacks,
98 input_handler,
99 renderer,
100 click_state,
101 system_settings,
102 current_cursor,
103 nc_button_pressed,
104 display,
105 fullscreen,
106 hwnd,
107 }
108 }
109
110 #[inline]
111 pub(crate) fn is_fullscreen(&self) -> bool {
112 self.fullscreen.is_some()
113 }
114
115 pub(crate) fn is_maximized(&self) -> bool {
116 !self.is_fullscreen() && unsafe { IsZoomed(self.hwnd) }.as_bool()
117 }
118
119 fn bounds(&self) -> Bounds<Pixels> {
120 Bounds {
121 origin: self.origin,
122 size: self.logical_size,
123 }
124 }
125
126 fn window_bounds(&self) -> WindowBounds {
127 let placement = unsafe {
128 let mut placement = WINDOWPLACEMENT {
129 length: std::mem::size_of::<WINDOWPLACEMENT>() as u32,
130 ..Default::default()
131 };
132 GetWindowPlacement(self.hwnd, &mut placement).log_err();
133 placement
134 };
135 let physical_size = size(
136 DevicePixels(placement.rcNormalPosition.right - placement.rcNormalPosition.left),
137 DevicePixels(placement.rcNormalPosition.bottom - placement.rcNormalPosition.top),
138 );
139 let bounds = Bounds {
140 origin: logical_point(
141 placement.rcNormalPosition.left as f32,
142 placement.rcNormalPosition.top as f32,
143 self.scale_factor,
144 ),
145 size: physical_size.to_pixels(self.scale_factor),
146 };
147
148 if self.is_fullscreen() {
149 WindowBounds::Fullscreen(self.fullscreen_restore_bounds)
150 } else if placement.showCmd == SW_SHOWMAXIMIZED.0 as u32 {
151 WindowBounds::Maximized(bounds)
152 } else {
153 WindowBounds::Windowed(bounds)
154 }
155 }
156
157 /// get the logical size of the app's drawable area.
158 ///
159 /// Currently, GPUI uses logical size of the app to handle mouse interactions (such as
160 /// whether the mouse collides with other elements of GPUI).
161 fn content_size(&self) -> Size<Pixels> {
162 self.logical_size
163 }
164
165 fn title_bar_padding(&self) -> Pixels {
166 // using USER_DEFAULT_SCREEN_DPI because GPUI handles the scale with the scale factor
167 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, USER_DEFAULT_SCREEN_DPI) };
168 px(padding as f32)
169 }
170
171 fn title_bar_top_offset(&self) -> Pixels {
172 if self.is_maximized() {
173 self.title_bar_padding() * 2
174 } else {
175 px(0.)
176 }
177 }
178
179 fn title_bar_height(&self) -> Pixels {
180 // todo(windows) this is hard set to match the ui title bar
181 // in the future the ui title bar component will report the size
182 px(32.) + self.title_bar_top_offset()
183 }
184
185 pub(crate) fn caption_button_width(&self) -> Pixels {
186 // todo(windows) this is hard set to match the ui title bar
187 // in the future the ui title bar component will report the size
188 px(36.)
189 }
190
191 pub(crate) fn get_titlebar_rect(&self) -> anyhow::Result<RECT> {
192 let height = self.title_bar_height();
193 let mut rect = RECT::default();
194 unsafe { GetClientRect(self.hwnd, &mut rect) }?;
195 rect.bottom = rect.top + ((height.0 * self.scale_factor).round() as i32);
196 Ok(rect)
197 }
198}
199
200impl WindowsWindowStatePtr {
201 fn new(context: &WindowCreateContext, hwnd: HWND, cs: &CREATESTRUCTW) -> Rc<Self> {
202 let state = RefCell::new(WindowsWindowState::new(
203 hwnd,
204 context.transparent,
205 cs,
206 context.current_cursor,
207 context.display,
208 ));
209
210 Rc::new(Self {
211 state,
212 hwnd,
213 handle: context.handle,
214 hide_title_bar: context.hide_title_bar,
215 executor: context.executor.clone(),
216 })
217 }
218}
219
220#[derive(Default)]
221pub(crate) struct Callbacks {
222 pub(crate) request_frame: Option<Box<dyn FnMut()>>,
223 pub(crate) input: Option<Box<dyn FnMut(crate::PlatformInput) -> DispatchEventResult>>,
224 pub(crate) active_status_change: Option<Box<dyn FnMut(bool)>>,
225 pub(crate) resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
226 pub(crate) moved: Option<Box<dyn FnMut()>>,
227 pub(crate) should_close: Option<Box<dyn FnMut() -> bool>>,
228 pub(crate) close: Option<Box<dyn FnOnce()>>,
229 pub(crate) appearance_changed: Option<Box<dyn FnMut()>>,
230}
231
232struct WindowCreateContext {
233 inner: Option<Rc<WindowsWindowStatePtr>>,
234 handle: AnyWindowHandle,
235 hide_title_bar: bool,
236 display: WindowsDisplay,
237 transparent: bool,
238 executor: ForegroundExecutor,
239 current_cursor: HCURSOR,
240}
241
242impl WindowsWindow {
243 pub(crate) fn new(
244 handle: AnyWindowHandle,
245 params: WindowParams,
246 icon: HICON,
247 executor: ForegroundExecutor,
248 current_cursor: HCURSOR,
249 ) -> Self {
250 let classname = register_wnd_class(icon);
251 let hide_title_bar = params
252 .titlebar
253 .as_ref()
254 .map(|titlebar| titlebar.appears_transparent)
255 .unwrap_or(false);
256 let windowname = HSTRING::from(
257 params
258 .titlebar
259 .as_ref()
260 .and_then(|titlebar| titlebar.title.as_ref())
261 .map(|title| title.as_ref())
262 .unwrap_or(""),
263 );
264 let dwstyle = WS_THICKFRAME | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX;
265 let hinstance = get_module_handle();
266 let display = if let Some(display_id) = params.display_id {
267 // if we obtain a display_id, then this ID must be valid.
268 WindowsDisplay::new(display_id).unwrap()
269 } else {
270 WindowsDisplay::primary_monitor().unwrap()
271 };
272 let mut context = WindowCreateContext {
273 inner: None,
274 handle,
275 hide_title_bar,
276 display,
277 transparent: params.window_background != WindowBackgroundAppearance::Opaque,
278 executor,
279 current_cursor,
280 };
281 let lpparam = Some(&context as *const _ as *const _);
282 let raw_hwnd = unsafe {
283 CreateWindowExW(
284 WS_EX_APPWINDOW,
285 classname,
286 &windowname,
287 dwstyle,
288 CW_USEDEFAULT,
289 CW_USEDEFAULT,
290 CW_USEDEFAULT,
291 CW_USEDEFAULT,
292 None,
293 None,
294 hinstance,
295 lpparam,
296 )
297 };
298 let state_ptr = Rc::clone(context.inner.as_ref().unwrap());
299 register_drag_drop(state_ptr.clone());
300 let wnd = Self(state_ptr);
301
302 unsafe {
303 let mut placement = WINDOWPLACEMENT {
304 length: std::mem::size_of::<WINDOWPLACEMENT>() as u32,
305 ..Default::default()
306 };
307 GetWindowPlacement(raw_hwnd, &mut placement).log_err();
308 // the bounds may be not inside the display
309 let bounds = if display.check_given_bounds(params.bounds) {
310 params.bounds
311 } else {
312 display.default_bounds()
313 };
314 let bounds = bounds.to_device_pixels(wnd.0.state.borrow().scale_factor);
315 placement.rcNormalPosition.left = bounds.left().0;
316 placement.rcNormalPosition.right = bounds.right().0;
317 placement.rcNormalPosition.top = bounds.top().0;
318 placement.rcNormalPosition.bottom = bounds.bottom().0;
319 SetWindowPlacement(raw_hwnd, &placement).log_err();
320 }
321 unsafe { ShowWindow(raw_hwnd, SW_SHOW).ok().log_err() };
322
323 wnd
324 }
325}
326
327impl rwh::HasWindowHandle for WindowsWindow {
328 fn window_handle(&self) -> std::result::Result<rwh::WindowHandle<'_>, rwh::HandleError> {
329 let raw =
330 rwh::Win32WindowHandle::new(unsafe { NonZeroIsize::new_unchecked(self.0.hwnd.0) })
331 .into();
332 Ok(unsafe { rwh::WindowHandle::borrow_raw(raw) })
333 }
334}
335
336// todo(windows)
337impl rwh::HasDisplayHandle for WindowsWindow {
338 fn display_handle(&self) -> std::result::Result<rwh::DisplayHandle<'_>, rwh::HandleError> {
339 unimplemented!()
340 }
341}
342
343impl Drop for WindowsWindow {
344 fn drop(&mut self) {
345 self.0.state.borrow_mut().renderer.destroy();
346 // clone this `Rc` to prevent early release of the pointer
347 let this = self.0.clone();
348 self.0
349 .executor
350 .spawn(async move {
351 let handle = this.hwnd;
352 unsafe {
353 RevokeDragDrop(handle).log_err();
354 DestroyWindow(handle).log_err();
355 }
356 })
357 .detach();
358 }
359}
360
361impl PlatformWindow for WindowsWindow {
362 fn bounds(&self) -> Bounds<Pixels> {
363 self.0.state.borrow().bounds()
364 }
365
366 fn is_maximized(&self) -> bool {
367 self.0.state.borrow().is_maximized()
368 }
369
370 fn window_bounds(&self) -> WindowBounds {
371 self.0.state.borrow().window_bounds()
372 }
373
374 /// get the logical size of the app's drawable area.
375 ///
376 /// Currently, GPUI uses logical size of the app to handle mouse interactions (such as
377 /// whether the mouse collides with other elements of GPUI).
378 fn content_size(&self) -> Size<Pixels> {
379 self.0.state.borrow().content_size()
380 }
381
382 fn scale_factor(&self) -> f32 {
383 self.0.state.borrow().scale_factor
384 }
385
386 // todo(windows)
387 fn appearance(&self) -> WindowAppearance {
388 WindowAppearance::Dark
389 }
390
391 fn display(&self) -> Option<Rc<dyn PlatformDisplay>> {
392 Some(Rc::new(self.0.state.borrow().display))
393 }
394
395 fn mouse_position(&self) -> Point<Pixels> {
396 let scale_factor = self.scale_factor();
397 let point = unsafe {
398 let mut point: POINT = std::mem::zeroed();
399 GetCursorPos(&mut point)
400 .context("unable to get cursor position")
401 .log_err();
402 ScreenToClient(self.0.hwnd, &mut point).ok().log_err();
403 point
404 };
405 logical_point(point.x as f32, point.y as f32, scale_factor)
406 }
407
408 // todo(windows)
409 fn modifiers(&self) -> Modifiers {
410 Modifiers::none()
411 }
412
413 fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
414 self.0.state.borrow_mut().input_handler = Some(input_handler);
415 }
416
417 fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
418 self.0.state.borrow_mut().input_handler.take()
419 }
420
421 fn prompt(
422 &self,
423 level: PromptLevel,
424 msg: &str,
425 detail: Option<&str>,
426 answers: &[&str],
427 ) -> Option<Receiver<usize>> {
428 let (done_tx, done_rx) = oneshot::channel();
429 let msg = msg.to_string();
430 let detail_string = match detail {
431 Some(info) => Some(info.to_string()),
432 None => None,
433 };
434 let answers = answers.iter().map(|s| s.to_string()).collect::<Vec<_>>();
435 let handle = self.0.hwnd;
436 self.0
437 .executor
438 .spawn(async move {
439 unsafe {
440 let mut config;
441 config = std::mem::zeroed::<TASKDIALOGCONFIG>();
442 config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
443 config.hwndParent = handle;
444 let title;
445 let main_icon;
446 match level {
447 crate::PromptLevel::Info => {
448 title = windows::core::w!("Info");
449 main_icon = TD_INFORMATION_ICON;
450 }
451 crate::PromptLevel::Warning => {
452 title = windows::core::w!("Warning");
453 main_icon = TD_WARNING_ICON;
454 }
455 crate::PromptLevel::Critical => {
456 title = windows::core::w!("Critical");
457 main_icon = TD_ERROR_ICON;
458 }
459 };
460 config.pszWindowTitle = title;
461 config.Anonymous1.pszMainIcon = main_icon;
462 let instruction = msg.encode_utf16().chain(Some(0)).collect_vec();
463 config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
464 let hints_encoded;
465 if let Some(ref hints) = detail_string {
466 hints_encoded = hints.encode_utf16().chain(Some(0)).collect_vec();
467 config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
468 };
469 let mut buttons = Vec::new();
470 let mut btn_encoded = Vec::new();
471 for (index, btn_string) in answers.iter().enumerate() {
472 let encoded = btn_string.encode_utf16().chain(Some(0)).collect_vec();
473 buttons.push(TASKDIALOG_BUTTON {
474 nButtonID: index as _,
475 pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
476 });
477 btn_encoded.push(encoded);
478 }
479 config.cButtons = buttons.len() as _;
480 config.pButtons = buttons.as_ptr();
481
482 config.pfCallback = None;
483 let mut res = std::mem::zeroed();
484 let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
485 .inspect_err(|e| log::error!("unable to create task dialog: {}", e));
486
487 let _ = done_tx.send(res as usize);
488 }
489 })
490 .detach();
491
492 Some(done_rx)
493 }
494
495 fn activate(&self) {
496 let hwnd = self.0.hwnd;
497 unsafe { SetActiveWindow(hwnd) };
498 unsafe { SetFocus(hwnd) };
499 // todo(windows)
500 // crate `windows 0.56` reports true as Err
501 unsafe { SetForegroundWindow(hwnd).as_bool() };
502 }
503
504 fn is_active(&self) -> bool {
505 self.0.hwnd == unsafe { GetActiveWindow() }
506 }
507
508 fn set_title(&mut self, title: &str) {
509 unsafe { SetWindowTextW(self.0.hwnd, &HSTRING::from(title)) }
510 .inspect_err(|e| log::error!("Set title failed: {e}"))
511 .ok();
512 }
513
514 fn set_app_id(&mut self, _app_id: &str) {}
515
516 fn set_background_appearance(&mut self, background_appearance: WindowBackgroundAppearance) {
517 self.0
518 .state
519 .borrow_mut()
520 .renderer
521 .update_transparency(background_appearance != WindowBackgroundAppearance::Opaque);
522 }
523
524 // todo(windows)
525 fn set_edited(&mut self, _edited: bool) {}
526
527 // todo(windows)
528 fn show_character_palette(&self) {}
529
530 fn minimize(&self) {
531 unsafe { ShowWindowAsync(self.0.hwnd, SW_MINIMIZE).ok().log_err() };
532 }
533
534 fn zoom(&self) {
535 unsafe { ShowWindowAsync(self.0.hwnd, SW_MAXIMIZE).ok().log_err() };
536 }
537
538 fn toggle_fullscreen(&self) {
539 let state_ptr = self.0.clone();
540 self.0
541 .executor
542 .spawn(async move {
543 let mut lock = state_ptr.state.borrow_mut();
544 lock.fullscreen_restore_bounds = Bounds {
545 origin: lock.origin,
546 size: lock.logical_size,
547 };
548 let StyleAndBounds {
549 style,
550 x,
551 y,
552 cx,
553 cy,
554 } = if let Some(state) = lock.fullscreen.take() {
555 state
556 } else {
557 let style =
558 WINDOW_STYLE(unsafe { get_window_long(state_ptr.hwnd, GWL_STYLE) } as _);
559 let mut rc = RECT::default();
560 unsafe { GetWindowRect(state_ptr.hwnd, &mut rc) }.log_err();
561 let _ = lock.fullscreen.insert(StyleAndBounds {
562 style,
563 x: rc.left,
564 y: rc.top,
565 cx: rc.right - rc.left,
566 cy: rc.bottom - rc.top,
567 });
568 let style = style
569 & !(WS_THICKFRAME
570 | WS_SYSMENU
571 | WS_MAXIMIZEBOX
572 | WS_MINIMIZEBOX
573 | WS_CAPTION);
574 let physical_bounds = lock.display.physical_bounds();
575 StyleAndBounds {
576 style,
577 x: physical_bounds.left().0,
578 y: physical_bounds.top().0,
579 cx: physical_bounds.size.width.0,
580 cy: physical_bounds.size.height.0,
581 }
582 };
583 drop(lock);
584 unsafe { set_window_long(state_ptr.hwnd, GWL_STYLE, style.0 as isize) };
585 unsafe {
586 SetWindowPos(
587 state_ptr.hwnd,
588 HWND::default(),
589 x,
590 y,
591 cx,
592 cy,
593 SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOZORDER,
594 )
595 }
596 .log_err();
597 })
598 .detach();
599 }
600
601 fn is_fullscreen(&self) -> bool {
602 self.0.state.borrow().is_fullscreen()
603 }
604
605 fn on_request_frame(&self, callback: Box<dyn FnMut()>) {
606 self.0.state.borrow_mut().callbacks.request_frame = Some(callback);
607 }
608
609 fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> DispatchEventResult>) {
610 self.0.state.borrow_mut().callbacks.input = Some(callback);
611 }
612
613 fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
614 self.0.state.borrow_mut().callbacks.active_status_change = Some(callback);
615 }
616
617 fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
618 self.0.state.borrow_mut().callbacks.resize = Some(callback);
619 }
620
621 fn on_moved(&self, callback: Box<dyn FnMut()>) {
622 self.0.state.borrow_mut().callbacks.moved = Some(callback);
623 }
624
625 fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
626 self.0.state.borrow_mut().callbacks.should_close = Some(callback);
627 }
628
629 fn on_close(&self, callback: Box<dyn FnOnce()>) {
630 self.0.state.borrow_mut().callbacks.close = Some(callback);
631 }
632
633 fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
634 self.0.state.borrow_mut().callbacks.appearance_changed = Some(callback);
635 }
636
637 fn draw(&self, scene: &Scene) {
638 self.0.state.borrow_mut().renderer.draw(scene)
639 }
640
641 fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
642 self.0.state.borrow().renderer.sprite_atlas().clone()
643 }
644
645 fn get_raw_handle(&self) -> HWND {
646 self.0.hwnd
647 }
648
649 fn show_window_menu(&self, _position: Point<Pixels>) {}
650
651 fn start_system_move(&self) {}
652
653 fn should_render_window_controls(&self) -> bool {
654 false
655 }
656}
657
658#[implement(IDropTarget)]
659struct WindowsDragDropHandler(pub Rc<WindowsWindowStatePtr>);
660
661impl WindowsDragDropHandler {
662 fn handle_drag_drop(&self, input: PlatformInput) {
663 let mut lock = self.0.state.borrow_mut();
664 if let Some(mut func) = lock.callbacks.input.take() {
665 drop(lock);
666 func(input);
667 self.0.state.borrow_mut().callbacks.input = Some(func);
668 }
669 }
670}
671
672#[allow(non_snake_case)]
673impl IDropTarget_Impl for WindowsDragDropHandler {
674 fn DragEnter(
675 &self,
676 pdataobj: Option<&IDataObject>,
677 _grfkeystate: MODIFIERKEYS_FLAGS,
678 pt: &POINTL,
679 pdweffect: *mut DROPEFFECT,
680 ) -> windows::core::Result<()> {
681 unsafe {
682 let Some(idata_obj) = pdataobj else {
683 log::info!("no dragging file or directory detected");
684 return Ok(());
685 };
686 let config = FORMATETC {
687 cfFormat: CF_HDROP.0,
688 ptd: std::ptr::null_mut() as _,
689 dwAspect: DVASPECT_CONTENT.0,
690 lindex: -1,
691 tymed: TYMED_HGLOBAL.0 as _,
692 };
693 if idata_obj.QueryGetData(&config as _) == S_OK {
694 *pdweffect = DROPEFFECT_LINK;
695 let Some(mut idata) = idata_obj.GetData(&config as _).log_err() else {
696 return Ok(());
697 };
698 if idata.u.hGlobal.is_invalid() {
699 return Ok(());
700 }
701 let hdrop = idata.u.hGlobal.0 as *mut HDROP;
702 let mut paths = SmallVec::<[PathBuf; 2]>::new();
703 let file_count = DragQueryFileW(*hdrop, DRAGDROP_GET_FILES_COUNT, None);
704 for file_index in 0..file_count {
705 let filename_length = DragQueryFileW(*hdrop, file_index, None) as usize;
706 let mut buffer = vec![0u16; filename_length + 1];
707 let ret = DragQueryFileW(*hdrop, file_index, Some(buffer.as_mut_slice()));
708 if ret == 0 {
709 log::error!("unable to read file name");
710 continue;
711 }
712 if let Some(file_name) =
713 String::from_utf16(&buffer[0..filename_length]).log_err()
714 {
715 if let Some(path) = PathBuf::from_str(&file_name).log_err() {
716 paths.push(path);
717 }
718 }
719 }
720 ReleaseStgMedium(&mut idata);
721 let mut cursor_position = POINT { x: pt.x, y: pt.y };
722 ScreenToClient(self.0.hwnd, &mut cursor_position)
723 .ok()
724 .log_err();
725 let scale_factor = self.0.state.borrow().scale_factor;
726 let input = PlatformInput::FileDrop(FileDropEvent::Entered {
727 position: logical_point(
728 cursor_position.x as f32,
729 cursor_position.y as f32,
730 scale_factor,
731 ),
732 paths: ExternalPaths(paths),
733 });
734 self.handle_drag_drop(input);
735 } else {
736 *pdweffect = DROPEFFECT_NONE;
737 }
738 }
739 Ok(())
740 }
741
742 fn DragOver(
743 &self,
744 _grfkeystate: MODIFIERKEYS_FLAGS,
745 pt: &POINTL,
746 _pdweffect: *mut DROPEFFECT,
747 ) -> windows::core::Result<()> {
748 let mut cursor_position = POINT { x: pt.x, y: pt.y };
749 unsafe {
750 ScreenToClient(self.0.hwnd, &mut cursor_position)
751 .ok()
752 .log_err();
753 }
754 let scale_factor = self.0.state.borrow().scale_factor;
755 let input = PlatformInput::FileDrop(FileDropEvent::Pending {
756 position: logical_point(
757 cursor_position.x as f32,
758 cursor_position.y as f32,
759 scale_factor,
760 ),
761 });
762 self.handle_drag_drop(input);
763
764 Ok(())
765 }
766
767 fn DragLeave(&self) -> windows::core::Result<()> {
768 let input = PlatformInput::FileDrop(FileDropEvent::Exited);
769 self.handle_drag_drop(input);
770
771 Ok(())
772 }
773
774 fn Drop(
775 &self,
776 _pdataobj: Option<&IDataObject>,
777 _grfkeystate: MODIFIERKEYS_FLAGS,
778 pt: &POINTL,
779 _pdweffect: *mut DROPEFFECT,
780 ) -> windows::core::Result<()> {
781 let mut cursor_position = POINT { x: pt.x, y: pt.y };
782 unsafe {
783 ScreenToClient(self.0.hwnd, &mut cursor_position)
784 .ok()
785 .log_err();
786 }
787 let scale_factor = self.0.state.borrow().scale_factor;
788 let input = PlatformInput::FileDrop(FileDropEvent::Submit {
789 position: logical_point(
790 cursor_position.x as f32,
791 cursor_position.y as f32,
792 scale_factor,
793 ),
794 });
795 self.handle_drag_drop(input);
796
797 Ok(())
798 }
799}
800
801#[derive(Debug)]
802pub(crate) struct ClickState {
803 button: MouseButton,
804 last_click: Instant,
805 last_position: Point<DevicePixels>,
806 pub(crate) current_count: usize,
807}
808
809impl ClickState {
810 pub fn new() -> Self {
811 ClickState {
812 button: MouseButton::Left,
813 last_click: Instant::now(),
814 last_position: Point::default(),
815 current_count: 0,
816 }
817 }
818
819 /// update self and return the needed click count
820 pub fn update(&mut self, button: MouseButton, new_position: Point<DevicePixels>) -> usize {
821 if self.button == button && self.is_double_click(new_position) {
822 self.current_count += 1;
823 } else {
824 self.current_count = 1;
825 }
826 self.last_click = Instant::now();
827 self.last_position = new_position;
828 self.button = button;
829
830 self.current_count
831 }
832
833 #[inline]
834 fn is_double_click(&self, new_position: Point<DevicePixels>) -> bool {
835 let diff = self.last_position - new_position;
836
837 self.last_click.elapsed() < DOUBLE_CLICK_INTERVAL
838 && diff.x.0.abs() <= DOUBLE_CLICK_SPATIAL_TOLERANCE
839 && diff.y.0.abs() <= DOUBLE_CLICK_SPATIAL_TOLERANCE
840 }
841}
842
843struct StyleAndBounds {
844 style: WINDOW_STYLE,
845 x: i32,
846 y: i32,
847 cx: i32,
848 cy: i32,
849}
850
851fn register_wnd_class(icon_handle: HICON) -> PCWSTR {
852 const CLASS_NAME: PCWSTR = w!("Zed::Window");
853
854 static ONCE: Once = Once::new();
855 ONCE.call_once(|| {
856 let wc = WNDCLASSW {
857 lpfnWndProc: Some(wnd_proc),
858 hIcon: icon_handle,
859 lpszClassName: PCWSTR(CLASS_NAME.as_ptr()),
860 style: CS_HREDRAW | CS_VREDRAW,
861 hInstance: get_module_handle().into(),
862 ..Default::default()
863 };
864 unsafe { RegisterClassW(&wc) };
865 });
866
867 CLASS_NAME
868}
869
870unsafe extern "system" fn wnd_proc(
871 hwnd: HWND,
872 msg: u32,
873 wparam: WPARAM,
874 lparam: LPARAM,
875) -> LRESULT {
876 if msg == WM_NCCREATE {
877 let cs = lparam.0 as *const CREATESTRUCTW;
878 let cs = unsafe { &*cs };
879 let ctx = cs.lpCreateParams as *mut WindowCreateContext;
880 let ctx = unsafe { &mut *ctx };
881 let state_ptr = WindowsWindowStatePtr::new(ctx, hwnd, cs);
882 let weak = Box::new(Rc::downgrade(&state_ptr));
883 unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
884 ctx.inner = Some(state_ptr);
885 return LRESULT(1);
886 }
887 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowStatePtr>;
888 if ptr.is_null() {
889 return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
890 }
891 let inner = unsafe { &*ptr };
892 let r = if let Some(state) = inner.upgrade() {
893 handle_msg(hwnd, msg, wparam, lparam, state)
894 } else {
895 unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
896 };
897 if msg == WM_NCDESTROY {
898 unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
899 unsafe { drop(Box::from_raw(ptr)) };
900 }
901 r
902}
903
904pub(crate) fn try_get_window_inner(hwnd: HWND) -> Option<Rc<WindowsWindowStatePtr>> {
905 if hwnd == HWND(0) {
906 return None;
907 }
908
909 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowStatePtr>;
910 if !ptr.is_null() {
911 let inner = unsafe { &*ptr };
912 inner.upgrade()
913 } else {
914 None
915 }
916}
917
918fn get_module_handle() -> HMODULE {
919 unsafe {
920 let mut h_module = std::mem::zeroed();
921 GetModuleHandleExW(
922 GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
923 windows::core::w!("ZedModule"),
924 &mut h_module,
925 )
926 .expect("Unable to get module handle"); // this should never fail
927
928 h_module
929 }
930}
931
932fn register_drag_drop(state_ptr: Rc<WindowsWindowStatePtr>) {
933 let window_handle = state_ptr.hwnd;
934 let handler = WindowsDragDropHandler(state_ptr);
935 // The lifetime of `IDropTarget` is handled by Windows, it wont release untill
936 // we call `RevokeDragDrop`.
937 // So, it's safe to drop it here.
938 let drag_drop_handler: IDropTarget = handler.into();
939 unsafe {
940 RegisterDragDrop(window_handle, &drag_drop_handler)
941 .expect("unable to register drag-drop event")
942 };
943}
944
945// https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-dragqueryfilew
946const DRAGDROP_GET_FILES_COUNT: u32 = 0xFFFFFFFF;
947// https://learn.microsoft.com/en-us/windows/win32/controls/ttm-setdelaytime?redirectedfrom=MSDN
948const DOUBLE_CLICK_INTERVAL: Duration = Duration::from_millis(500);
949// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getsystemmetrics
950const DOUBLE_CLICK_SPATIAL_TOLERANCE: i32 = 4;
951
952mod windows_renderer {
953 use std::{num::NonZeroIsize, sync::Arc};
954
955 use blade_graphics as gpu;
956 use raw_window_handle as rwh;
957 use windows::Win32::{Foundation::HWND, UI::WindowsAndMessaging::GWLP_HINSTANCE};
958
959 use crate::{
960 get_window_long,
961 platform::blade::{BladeRenderer, BladeSurfaceConfig},
962 };
963
964 pub(super) fn windows_renderer(hwnd: HWND, transparent: bool) -> BladeRenderer {
965 let raw = RawWindow { hwnd: hwnd.0 };
966 let gpu: Arc<gpu::Context> = Arc::new(
967 unsafe {
968 gpu::Context::init_windowed(
969 &raw,
970 gpu::ContextDesc {
971 validation: false,
972 capture: false,
973 overlay: false,
974 },
975 )
976 }
977 .unwrap(),
978 );
979 let config = BladeSurfaceConfig {
980 size: gpu::Extent::default(),
981 transparent,
982 };
983
984 BladeRenderer::new(gpu, config)
985 }
986
987 struct RawWindow {
988 hwnd: isize,
989 }
990
991 impl rwh::HasWindowHandle for RawWindow {
992 fn window_handle(&self) -> Result<rwh::WindowHandle<'_>, rwh::HandleError> {
993 Ok(unsafe {
994 let hwnd = NonZeroIsize::new_unchecked(self.hwnd);
995 let mut handle = rwh::Win32WindowHandle::new(hwnd);
996 let hinstance = get_window_long(HWND(self.hwnd), GWLP_HINSTANCE);
997 handle.hinstance = NonZeroIsize::new(hinstance);
998 rwh::WindowHandle::borrow_raw(handle.into())
999 })
1000 }
1001 }
1002
1003 impl rwh::HasDisplayHandle for RawWindow {
1004 fn display_handle(&self) -> Result<rwh::DisplayHandle<'_>, rwh::HandleError> {
1005 let handle = rwh::WindowsDisplayHandle::new();
1006 Ok(unsafe { rwh::DisplayHandle::borrow_raw(handle.into()) })
1007 }
1008 }
1009}
1010
1011#[cfg(test)]
1012mod tests {
1013 use super::ClickState;
1014 use crate::{point, DevicePixels, MouseButton};
1015 use std::time::Duration;
1016
1017 #[test]
1018 fn test_double_click_interval() {
1019 let mut state = ClickState::new();
1020 assert_eq!(
1021 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1022 1
1023 );
1024 assert_eq!(
1025 state.update(MouseButton::Right, point(DevicePixels(0), DevicePixels(0))),
1026 1
1027 );
1028 assert_eq!(
1029 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1030 1
1031 );
1032 assert_eq!(
1033 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1034 2
1035 );
1036 state.last_click -= Duration::from_millis(700);
1037 assert_eq!(
1038 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1039 1
1040 );
1041 }
1042
1043 #[test]
1044 fn test_double_click_spatial_tolerance() {
1045 let mut state = ClickState::new();
1046 assert_eq!(
1047 state.update(MouseButton::Left, point(DevicePixels(-3), DevicePixels(0))),
1048 1
1049 );
1050 assert_eq!(
1051 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(3))),
1052 2
1053 );
1054 assert_eq!(
1055 state.update(MouseButton::Right, point(DevicePixels(3), DevicePixels(2))),
1056 1
1057 );
1058 assert_eq!(
1059 state.update(MouseButton::Right, point(DevicePixels(10), DevicePixels(0))),
1060 1
1061 );
1062 }
1063}