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) is_movable: bool,
61 pub(crate) executor: ForegroundExecutor,
62}
63
64impl WindowsWindowState {
65 fn new(
66 hwnd: HWND,
67 transparent: bool,
68 cs: &CREATESTRUCTW,
69 current_cursor: HCURSOR,
70 display: WindowsDisplay,
71 ) -> Self {
72 let scale_factor = {
73 let monitor_dpi = unsafe { GetDpiForWindow(hwnd) } as f32;
74 monitor_dpi / USER_DEFAULT_SCREEN_DPI as f32
75 };
76 let origin = logical_point(cs.x as f32, cs.y as f32, scale_factor);
77 let logical_size = {
78 let physical_size = size(DevicePixels(cs.cx), DevicePixels(cs.cy));
79 physical_size.to_pixels(scale_factor)
80 };
81 let fullscreen_restore_bounds = Bounds {
82 origin,
83 size: logical_size,
84 };
85 let renderer = windows_renderer::windows_renderer(hwnd, transparent);
86 let callbacks = Callbacks::default();
87 let input_handler = None;
88 let click_state = ClickState::new();
89 let system_settings = WindowsSystemSettings::new();
90 let nc_button_pressed = None;
91 let fullscreen = None;
92
93 Self {
94 origin,
95 logical_size,
96 fullscreen_restore_bounds,
97 scale_factor,
98 callbacks,
99 input_handler,
100 renderer,
101 click_state,
102 system_settings,
103 current_cursor,
104 nc_button_pressed,
105 display,
106 fullscreen,
107 hwnd,
108 }
109 }
110
111 #[inline]
112 pub(crate) fn is_fullscreen(&self) -> bool {
113 self.fullscreen.is_some()
114 }
115
116 pub(crate) fn is_maximized(&self) -> bool {
117 !self.is_fullscreen() && unsafe { IsZoomed(self.hwnd) }.as_bool()
118 }
119
120 fn bounds(&self) -> Bounds<Pixels> {
121 Bounds {
122 origin: self.origin,
123 size: self.logical_size,
124 }
125 }
126
127 fn window_bounds(&self) -> WindowBounds {
128 let placement = unsafe {
129 let mut placement = WINDOWPLACEMENT {
130 length: std::mem::size_of::<WINDOWPLACEMENT>() as u32,
131 ..Default::default()
132 };
133 GetWindowPlacement(self.hwnd, &mut placement).log_err();
134 placement
135 };
136 let physical_size = size(
137 DevicePixels(placement.rcNormalPosition.right - placement.rcNormalPosition.left),
138 DevicePixels(placement.rcNormalPosition.bottom - placement.rcNormalPosition.top),
139 );
140 let bounds = Bounds {
141 origin: logical_point(
142 placement.rcNormalPosition.left as f32,
143 placement.rcNormalPosition.top as f32,
144 self.scale_factor,
145 ),
146 size: physical_size.to_pixels(self.scale_factor),
147 };
148
149 if self.is_fullscreen() {
150 WindowBounds::Fullscreen(self.fullscreen_restore_bounds)
151 } else if placement.showCmd == SW_SHOWMAXIMIZED.0 as u32 {
152 WindowBounds::Maximized(bounds)
153 } else {
154 WindowBounds::Windowed(bounds)
155 }
156 }
157
158 /// get the logical size of the app's drawable area.
159 ///
160 /// Currently, GPUI uses logical size of the app to handle mouse interactions (such as
161 /// whether the mouse collides with other elements of GPUI).
162 fn content_size(&self) -> Size<Pixels> {
163 self.logical_size
164 }
165
166 fn title_bar_padding(&self) -> Pixels {
167 // using USER_DEFAULT_SCREEN_DPI because GPUI handles the scale with the scale factor
168 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, USER_DEFAULT_SCREEN_DPI) };
169 px(padding as f32)
170 }
171
172 fn title_bar_top_offset(&self) -> Pixels {
173 if self.is_maximized() {
174 self.title_bar_padding() * 2
175 } else {
176 px(0.)
177 }
178 }
179
180 fn title_bar_height(&self) -> Pixels {
181 // todo(windows) this is hard set to match the ui title bar
182 // in the future the ui title bar component will report the size
183 px(32.) + self.title_bar_top_offset()
184 }
185
186 pub(crate) fn caption_button_width(&self) -> Pixels {
187 // todo(windows) this is hard set to match the ui title bar
188 // in the future the ui title bar component will report the size
189 px(36.)
190 }
191
192 pub(crate) fn get_titlebar_rect(&self) -> anyhow::Result<RECT> {
193 let height = self.title_bar_height();
194 let mut rect = RECT::default();
195 unsafe { GetClientRect(self.hwnd, &mut rect) }?;
196 rect.bottom = rect.top + ((height.0 * self.scale_factor).round() as i32);
197 Ok(rect)
198 }
199}
200
201impl WindowsWindowStatePtr {
202 fn new(context: &WindowCreateContext, hwnd: HWND, cs: &CREATESTRUCTW) -> Rc<Self> {
203 let state = RefCell::new(WindowsWindowState::new(
204 hwnd,
205 context.transparent,
206 cs,
207 context.current_cursor,
208 context.display,
209 ));
210
211 Rc::new(Self {
212 state,
213 hwnd,
214 handle: context.handle,
215 hide_title_bar: context.hide_title_bar,
216 is_movable: context.is_movable,
217 executor: context.executor.clone(),
218 })
219 }
220}
221
222#[derive(Default)]
223pub(crate) struct Callbacks {
224 pub(crate) request_frame: Option<Box<dyn FnMut()>>,
225 pub(crate) input: Option<Box<dyn FnMut(crate::PlatformInput) -> DispatchEventResult>>,
226 pub(crate) active_status_change: Option<Box<dyn FnMut(bool)>>,
227 pub(crate) resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
228 pub(crate) moved: Option<Box<dyn FnMut()>>,
229 pub(crate) should_close: Option<Box<dyn FnMut() -> bool>>,
230 pub(crate) close: Option<Box<dyn FnOnce()>>,
231 pub(crate) appearance_changed: Option<Box<dyn FnMut()>>,
232}
233
234struct WindowCreateContext {
235 inner: Option<Rc<WindowsWindowStatePtr>>,
236 handle: AnyWindowHandle,
237 hide_title_bar: bool,
238 display: WindowsDisplay,
239 transparent: bool,
240 is_movable: bool,
241 executor: ForegroundExecutor,
242 current_cursor: HCURSOR,
243}
244
245impl WindowsWindow {
246 pub(crate) fn new(
247 handle: AnyWindowHandle,
248 params: WindowParams,
249 icon: HICON,
250 executor: ForegroundExecutor,
251 current_cursor: HCURSOR,
252 ) -> Self {
253 let classname = register_wnd_class(icon);
254 let hide_title_bar = params
255 .titlebar
256 .as_ref()
257 .map(|titlebar| titlebar.appears_transparent)
258 .unwrap_or(true);
259 let windowname = HSTRING::from(
260 params
261 .titlebar
262 .as_ref()
263 .and_then(|titlebar| titlebar.title.as_ref())
264 .map(|title| title.as_ref())
265 .unwrap_or(""),
266 );
267 let (dwexstyle, dwstyle) = if params.kind == WindowKind::PopUp {
268 (WS_EX_TOOLWINDOW, WINDOW_STYLE(0x0))
269 } else {
270 (
271 WS_EX_APPWINDOW,
272 WS_THICKFRAME | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX,
273 )
274 };
275 let hinstance = get_module_handle();
276 let display = if let Some(display_id) = params.display_id {
277 // if we obtain a display_id, then this ID must be valid.
278 WindowsDisplay::new(display_id).unwrap()
279 } else {
280 WindowsDisplay::primary_monitor().unwrap()
281 };
282 let mut context = WindowCreateContext {
283 inner: None,
284 handle,
285 hide_title_bar,
286 display,
287 transparent: true,
288 is_movable: params.is_movable,
289 executor,
290 current_cursor,
291 };
292 let lpparam = Some(&context as *const _ as *const _);
293 let raw_hwnd = unsafe {
294 CreateWindowExW(
295 dwexstyle,
296 classname,
297 &windowname,
298 dwstyle,
299 CW_USEDEFAULT,
300 CW_USEDEFAULT,
301 CW_USEDEFAULT,
302 CW_USEDEFAULT,
303 None,
304 None,
305 hinstance,
306 lpparam,
307 )
308 };
309 let state_ptr = Rc::clone(context.inner.as_ref().unwrap());
310 register_drag_drop(state_ptr.clone());
311 let wnd = Self(state_ptr);
312
313 unsafe {
314 let mut placement = WINDOWPLACEMENT {
315 length: std::mem::size_of::<WINDOWPLACEMENT>() as u32,
316 ..Default::default()
317 };
318 GetWindowPlacement(raw_hwnd, &mut placement).log_err();
319 // the bounds may be not inside the display
320 let bounds = if display.check_given_bounds(params.bounds) {
321 params.bounds
322 } else {
323 display.default_bounds()
324 };
325 let bounds = bounds.to_device_pixels(wnd.0.state.borrow().scale_factor);
326 placement.rcNormalPosition.left = bounds.left().0;
327 placement.rcNormalPosition.right = bounds.right().0;
328 placement.rcNormalPosition.top = bounds.top().0;
329 placement.rcNormalPosition.bottom = bounds.bottom().0;
330 SetWindowPlacement(raw_hwnd, &placement).log_err();
331 }
332 unsafe { ShowWindow(raw_hwnd, SW_SHOW).ok().log_err() };
333
334 wnd
335 }
336}
337
338impl rwh::HasWindowHandle for WindowsWindow {
339 fn window_handle(&self) -> std::result::Result<rwh::WindowHandle<'_>, rwh::HandleError> {
340 let raw =
341 rwh::Win32WindowHandle::new(unsafe { NonZeroIsize::new_unchecked(self.0.hwnd.0) })
342 .into();
343 Ok(unsafe { rwh::WindowHandle::borrow_raw(raw) })
344 }
345}
346
347// todo(windows)
348impl rwh::HasDisplayHandle for WindowsWindow {
349 fn display_handle(&self) -> std::result::Result<rwh::DisplayHandle<'_>, rwh::HandleError> {
350 unimplemented!()
351 }
352}
353
354impl Drop for WindowsWindow {
355 fn drop(&mut self) {
356 self.0.state.borrow_mut().renderer.destroy();
357 // clone this `Rc` to prevent early release of the pointer
358 let this = self.0.clone();
359 self.0
360 .executor
361 .spawn(async move {
362 let handle = this.hwnd;
363 unsafe {
364 RevokeDragDrop(handle).log_err();
365 DestroyWindow(handle).log_err();
366 }
367 })
368 .detach();
369 }
370}
371
372impl PlatformWindow for WindowsWindow {
373 fn bounds(&self) -> Bounds<Pixels> {
374 self.0.state.borrow().bounds()
375 }
376
377 fn is_maximized(&self) -> bool {
378 self.0.state.borrow().is_maximized()
379 }
380
381 fn window_bounds(&self) -> WindowBounds {
382 self.0.state.borrow().window_bounds()
383 }
384
385 /// get the logical size of the app's drawable area.
386 ///
387 /// Currently, GPUI uses logical size of the app to handle mouse interactions (such as
388 /// whether the mouse collides with other elements of GPUI).
389 fn content_size(&self) -> Size<Pixels> {
390 self.0.state.borrow().content_size()
391 }
392
393 fn scale_factor(&self) -> f32 {
394 self.0.state.borrow().scale_factor
395 }
396
397 fn appearance(&self) -> WindowAppearance {
398 system_appearance().log_err().unwrap_or_default()
399 }
400
401 fn display(&self) -> Option<Rc<dyn PlatformDisplay>> {
402 Some(Rc::new(self.0.state.borrow().display))
403 }
404
405 fn mouse_position(&self) -> Point<Pixels> {
406 let scale_factor = self.scale_factor();
407 let point = unsafe {
408 let mut point: POINT = std::mem::zeroed();
409 GetCursorPos(&mut point)
410 .context("unable to get cursor position")
411 .log_err();
412 ScreenToClient(self.0.hwnd, &mut point).ok().log_err();
413 point
414 };
415 logical_point(point.x as f32, point.y as f32, scale_factor)
416 }
417
418 fn modifiers(&self) -> Modifiers {
419 current_modifiers()
420 }
421
422 fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
423 self.0.state.borrow_mut().input_handler = Some(input_handler);
424 }
425
426 fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
427 self.0.state.borrow_mut().input_handler.take()
428 }
429
430 fn prompt(
431 &self,
432 level: PromptLevel,
433 msg: &str,
434 detail: Option<&str>,
435 answers: &[&str],
436 ) -> Option<Receiver<usize>> {
437 let (done_tx, done_rx) = oneshot::channel();
438 let msg = msg.to_string();
439 let detail_string = match detail {
440 Some(info) => Some(info.to_string()),
441 None => None,
442 };
443 let answers = answers.iter().map(|s| s.to_string()).collect::<Vec<_>>();
444 let handle = self.0.hwnd;
445 self.0
446 .executor
447 .spawn(async move {
448 unsafe {
449 let mut config;
450 config = std::mem::zeroed::<TASKDIALOGCONFIG>();
451 config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
452 config.hwndParent = handle;
453 let title;
454 let main_icon;
455 match level {
456 crate::PromptLevel::Info => {
457 title = windows::core::w!("Info");
458 main_icon = TD_INFORMATION_ICON;
459 }
460 crate::PromptLevel::Warning => {
461 title = windows::core::w!("Warning");
462 main_icon = TD_WARNING_ICON;
463 }
464 crate::PromptLevel::Critical => {
465 title = windows::core::w!("Critical");
466 main_icon = TD_ERROR_ICON;
467 }
468 };
469 config.pszWindowTitle = title;
470 config.Anonymous1.pszMainIcon = main_icon;
471 let instruction = msg.encode_utf16().chain(Some(0)).collect_vec();
472 config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
473 let hints_encoded;
474 if let Some(ref hints) = detail_string {
475 hints_encoded = hints.encode_utf16().chain(Some(0)).collect_vec();
476 config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
477 };
478 let mut buttons = Vec::new();
479 let mut btn_encoded = Vec::new();
480 for (index, btn_string) in answers.iter().enumerate() {
481 let encoded = btn_string.encode_utf16().chain(Some(0)).collect_vec();
482 buttons.push(TASKDIALOG_BUTTON {
483 nButtonID: index as _,
484 pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
485 });
486 btn_encoded.push(encoded);
487 }
488 config.cButtons = buttons.len() as _;
489 config.pButtons = buttons.as_ptr();
490
491 config.pfCallback = None;
492 let mut res = std::mem::zeroed();
493 let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
494 .inspect_err(|e| log::error!("unable to create task dialog: {}", e));
495
496 let _ = done_tx.send(res as usize);
497 }
498 })
499 .detach();
500
501 Some(done_rx)
502 }
503
504 fn activate(&self) {
505 let hwnd = self.0.hwnd;
506 unsafe { SetActiveWindow(hwnd) };
507 unsafe { SetFocus(hwnd) };
508 // todo(windows)
509 // crate `windows 0.56` reports true as Err
510 unsafe { SetForegroundWindow(hwnd).as_bool() };
511 }
512
513 fn is_active(&self) -> bool {
514 self.0.hwnd == unsafe { GetActiveWindow() }
515 }
516
517 // is_hovered is unused on Windows. See WindowContext::is_window_hovered.
518 fn is_hovered(&self) -> bool {
519 false
520 }
521
522 fn set_title(&mut self, title: &str) {
523 unsafe { SetWindowTextW(self.0.hwnd, &HSTRING::from(title)) }
524 .inspect_err(|e| log::error!("Set title failed: {e}"))
525 .ok();
526 }
527
528 fn set_background_appearance(&self, background_appearance: WindowBackgroundAppearance) {
529 self.0
530 .state
531 .borrow_mut()
532 .renderer
533 .update_transparency(background_appearance != WindowBackgroundAppearance::Opaque);
534 }
535
536 fn minimize(&self) {
537 unsafe { ShowWindowAsync(self.0.hwnd, SW_MINIMIZE).ok().log_err() };
538 }
539
540 fn zoom(&self) {
541 unsafe { ShowWindowAsync(self.0.hwnd, SW_MAXIMIZE).ok().log_err() };
542 }
543
544 fn toggle_fullscreen(&self) {
545 let state_ptr = self.0.clone();
546 self.0
547 .executor
548 .spawn(async move {
549 let mut lock = state_ptr.state.borrow_mut();
550 lock.fullscreen_restore_bounds = Bounds {
551 origin: lock.origin,
552 size: lock.logical_size,
553 };
554 let StyleAndBounds {
555 style,
556 x,
557 y,
558 cx,
559 cy,
560 } = if let Some(state) = lock.fullscreen.take() {
561 state
562 } else {
563 let style =
564 WINDOW_STYLE(unsafe { get_window_long(state_ptr.hwnd, GWL_STYLE) } as _);
565 let mut rc = RECT::default();
566 unsafe { GetWindowRect(state_ptr.hwnd, &mut rc) }.log_err();
567 let _ = lock.fullscreen.insert(StyleAndBounds {
568 style,
569 x: rc.left,
570 y: rc.top,
571 cx: rc.right - rc.left,
572 cy: rc.bottom - rc.top,
573 });
574 let style = style
575 & !(WS_THICKFRAME
576 | WS_SYSMENU
577 | WS_MAXIMIZEBOX
578 | WS_MINIMIZEBOX
579 | WS_CAPTION);
580 let physical_bounds = lock.display.physical_bounds();
581 StyleAndBounds {
582 style,
583 x: physical_bounds.left().0,
584 y: physical_bounds.top().0,
585 cx: physical_bounds.size.width.0,
586 cy: physical_bounds.size.height.0,
587 }
588 };
589 drop(lock);
590 unsafe { set_window_long(state_ptr.hwnd, GWL_STYLE, style.0 as isize) };
591 unsafe {
592 SetWindowPos(
593 state_ptr.hwnd,
594 HWND::default(),
595 x,
596 y,
597 cx,
598 cy,
599 SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOZORDER,
600 )
601 }
602 .log_err();
603 })
604 .detach();
605 }
606
607 fn is_fullscreen(&self) -> bool {
608 self.0.state.borrow().is_fullscreen()
609 }
610
611 fn on_request_frame(&self, callback: Box<dyn FnMut()>) {
612 self.0.state.borrow_mut().callbacks.request_frame = Some(callback);
613 }
614
615 fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> DispatchEventResult>) {
616 self.0.state.borrow_mut().callbacks.input = Some(callback);
617 }
618
619 fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
620 self.0.state.borrow_mut().callbacks.active_status_change = Some(callback);
621 }
622
623 fn on_hover_status_change(&self, _: Box<dyn FnMut(bool)>) {}
624
625 fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
626 self.0.state.borrow_mut().callbacks.resize = Some(callback);
627 }
628
629 fn on_moved(&self, callback: Box<dyn FnMut()>) {
630 self.0.state.borrow_mut().callbacks.moved = Some(callback);
631 }
632
633 fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
634 self.0.state.borrow_mut().callbacks.should_close = Some(callback);
635 }
636
637 fn on_close(&self, callback: Box<dyn FnOnce()>) {
638 self.0.state.borrow_mut().callbacks.close = Some(callback);
639 }
640
641 fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
642 self.0.state.borrow_mut().callbacks.appearance_changed = Some(callback);
643 }
644
645 fn draw(&self, scene: &Scene) {
646 self.0.state.borrow_mut().renderer.draw(scene)
647 }
648
649 fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
650 self.0.state.borrow().renderer.sprite_atlas().clone()
651 }
652
653 fn get_raw_handle(&self) -> HWND {
654 self.0.hwnd
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 double_click_spatial_tolerance_width: i32,
807 double_click_spatial_tolerance_height: i32,
808 double_click_interval: Duration,
809 pub(crate) current_count: usize,
810}
811
812impl ClickState {
813 pub fn new() -> Self {
814 let double_click_spatial_tolerance_width = unsafe { GetSystemMetrics(SM_CXDOUBLECLK) };
815 let double_click_spatial_tolerance_height = unsafe { GetSystemMetrics(SM_CYDOUBLECLK) };
816 let double_click_interval = Duration::from_millis(unsafe { GetDoubleClickTime() } as u64);
817
818 ClickState {
819 button: MouseButton::Left,
820 last_click: Instant::now(),
821 last_position: Point::default(),
822 double_click_spatial_tolerance_width,
823 double_click_spatial_tolerance_height,
824 double_click_interval,
825 current_count: 0,
826 }
827 }
828
829 /// update self and return the needed click count
830 pub fn update(&mut self, button: MouseButton, new_position: Point<DevicePixels>) -> usize {
831 if self.button == button && self.is_double_click(new_position) {
832 self.current_count += 1;
833 } else {
834 self.current_count = 1;
835 }
836 self.last_click = Instant::now();
837 self.last_position = new_position;
838 self.button = button;
839
840 self.current_count
841 }
842
843 pub fn system_update(&mut self) {
844 self.double_click_spatial_tolerance_width = unsafe { GetSystemMetrics(SM_CXDOUBLECLK) };
845 self.double_click_spatial_tolerance_height = unsafe { GetSystemMetrics(SM_CYDOUBLECLK) };
846 self.double_click_interval = Duration::from_millis(unsafe { GetDoubleClickTime() } as u64);
847 }
848
849 #[inline]
850 fn is_double_click(&self, new_position: Point<DevicePixels>) -> bool {
851 let diff = self.last_position - new_position;
852
853 self.last_click.elapsed() < self.double_click_interval
854 && diff.x.0.abs() <= self.double_click_spatial_tolerance_width
855 && diff.y.0.abs() <= self.double_click_spatial_tolerance_height
856 }
857}
858
859struct StyleAndBounds {
860 style: WINDOW_STYLE,
861 x: i32,
862 y: i32,
863 cx: i32,
864 cy: i32,
865}
866
867fn register_wnd_class(icon_handle: HICON) -> PCWSTR {
868 const CLASS_NAME: PCWSTR = w!("Zed::Window");
869
870 static ONCE: Once = Once::new();
871 ONCE.call_once(|| {
872 let wc = WNDCLASSW {
873 lpfnWndProc: Some(wnd_proc),
874 hIcon: icon_handle,
875 lpszClassName: PCWSTR(CLASS_NAME.as_ptr()),
876 style: CS_HREDRAW | CS_VREDRAW,
877 hInstance: get_module_handle().into(),
878 ..Default::default()
879 };
880 unsafe { RegisterClassW(&wc) };
881 });
882
883 CLASS_NAME
884}
885
886unsafe extern "system" fn wnd_proc(
887 hwnd: HWND,
888 msg: u32,
889 wparam: WPARAM,
890 lparam: LPARAM,
891) -> LRESULT {
892 if msg == WM_NCCREATE {
893 let cs = lparam.0 as *const CREATESTRUCTW;
894 let cs = unsafe { &*cs };
895 let ctx = cs.lpCreateParams as *mut WindowCreateContext;
896 let ctx = unsafe { &mut *ctx };
897 let state_ptr = WindowsWindowStatePtr::new(ctx, hwnd, cs);
898 let weak = Box::new(Rc::downgrade(&state_ptr));
899 unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
900 ctx.inner = Some(state_ptr);
901 return LRESULT(1);
902 }
903 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowStatePtr>;
904 if ptr.is_null() {
905 return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
906 }
907 let inner = unsafe { &*ptr };
908 let r = if let Some(state) = inner.upgrade() {
909 handle_msg(hwnd, msg, wparam, lparam, state)
910 } else {
911 unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
912 };
913 if msg == WM_NCDESTROY {
914 unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
915 unsafe { drop(Box::from_raw(ptr)) };
916 }
917 r
918}
919
920pub(crate) fn try_get_window_inner(hwnd: HWND) -> Option<Rc<WindowsWindowStatePtr>> {
921 if hwnd == HWND(0) {
922 return None;
923 }
924
925 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowStatePtr>;
926 if !ptr.is_null() {
927 let inner = unsafe { &*ptr };
928 inner.upgrade()
929 } else {
930 None
931 }
932}
933
934fn get_module_handle() -> HMODULE {
935 unsafe {
936 let mut h_module = std::mem::zeroed();
937 GetModuleHandleExW(
938 GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
939 windows::core::w!("ZedModule"),
940 &mut h_module,
941 )
942 .expect("Unable to get module handle"); // this should never fail
943
944 h_module
945 }
946}
947
948fn register_drag_drop(state_ptr: Rc<WindowsWindowStatePtr>) {
949 let window_handle = state_ptr.hwnd;
950 let handler = WindowsDragDropHandler(state_ptr);
951 // The lifetime of `IDropTarget` is handled by Windows, it wont release untill
952 // we call `RevokeDragDrop`.
953 // So, it's safe to drop it here.
954 let drag_drop_handler: IDropTarget = handler.into();
955 unsafe {
956 RegisterDragDrop(window_handle, &drag_drop_handler)
957 .expect("unable to register drag-drop event")
958 };
959}
960
961// https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-dragqueryfilew
962const DRAGDROP_GET_FILES_COUNT: u32 = 0xFFFFFFFF;
963
964mod windows_renderer {
965 use std::{num::NonZeroIsize, sync::Arc};
966
967 use blade_graphics as gpu;
968 use raw_window_handle as rwh;
969 use windows::Win32::{Foundation::HWND, UI::WindowsAndMessaging::GWLP_HINSTANCE};
970
971 use crate::{
972 get_window_long,
973 platform::blade::{BladeRenderer, BladeSurfaceConfig},
974 };
975
976 pub(super) fn windows_renderer(hwnd: HWND, transparent: bool) -> BladeRenderer {
977 let raw = RawWindow { hwnd: hwnd.0 };
978 let gpu: Arc<gpu::Context> = Arc::new(
979 unsafe {
980 gpu::Context::init_windowed(
981 &raw,
982 gpu::ContextDesc {
983 validation: false,
984 capture: false,
985 overlay: false,
986 },
987 )
988 }
989 .unwrap(),
990 );
991 let config = BladeSurfaceConfig {
992 size: gpu::Extent::default(),
993 transparent,
994 };
995
996 BladeRenderer::new(gpu, config)
997 }
998
999 struct RawWindow {
1000 hwnd: isize,
1001 }
1002
1003 impl rwh::HasWindowHandle for RawWindow {
1004 fn window_handle(&self) -> Result<rwh::WindowHandle<'_>, rwh::HandleError> {
1005 Ok(unsafe {
1006 let hwnd = NonZeroIsize::new_unchecked(self.hwnd);
1007 let mut handle = rwh::Win32WindowHandle::new(hwnd);
1008 let hinstance = get_window_long(HWND(self.hwnd), GWLP_HINSTANCE);
1009 handle.hinstance = NonZeroIsize::new(hinstance);
1010 rwh::WindowHandle::borrow_raw(handle.into())
1011 })
1012 }
1013 }
1014
1015 impl rwh::HasDisplayHandle for RawWindow {
1016 fn display_handle(&self) -> Result<rwh::DisplayHandle<'_>, rwh::HandleError> {
1017 let handle = rwh::WindowsDisplayHandle::new();
1018 Ok(unsafe { rwh::DisplayHandle::borrow_raw(handle.into()) })
1019 }
1020 }
1021}
1022
1023#[cfg(test)]
1024mod tests {
1025 use super::ClickState;
1026 use crate::{point, DevicePixels, MouseButton};
1027 use std::time::Duration;
1028
1029 #[test]
1030 fn test_double_click_interval() {
1031 let mut state = ClickState::new();
1032 assert_eq!(
1033 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1034 1
1035 );
1036 assert_eq!(
1037 state.update(MouseButton::Right, point(DevicePixels(0), DevicePixels(0))),
1038 1
1039 );
1040 assert_eq!(
1041 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1042 1
1043 );
1044 assert_eq!(
1045 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1046 2
1047 );
1048 state.last_click -= Duration::from_millis(700);
1049 assert_eq!(
1050 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(0))),
1051 1
1052 );
1053 }
1054
1055 #[test]
1056 fn test_double_click_spatial_tolerance() {
1057 let mut state = ClickState::new();
1058 assert_eq!(
1059 state.update(MouseButton::Left, point(DevicePixels(-3), DevicePixels(0))),
1060 1
1061 );
1062 assert_eq!(
1063 state.update(MouseButton::Left, point(DevicePixels(0), DevicePixels(3))),
1064 2
1065 );
1066 assert_eq!(
1067 state.update(MouseButton::Right, point(DevicePixels(3), DevicePixels(2))),
1068 1
1069 );
1070 assert_eq!(
1071 state.update(MouseButton::Right, point(DevicePixels(10), DevicePixels(0))),
1072 1
1073 );
1074 }
1075}