1#![deny(unsafe_op_in_unsafe_fn)]
2
3use std::{
4 any::Any,
5 cell::{Cell, RefCell},
6 ffi::c_void,
7 iter::once,
8 num::NonZeroIsize,
9 path::PathBuf,
10 rc::{Rc, Weak},
11 str::FromStr,
12 sync::{Arc, Once},
13};
14
15use ::util::ResultExt;
16use blade_graphics as gpu;
17use futures::channel::oneshot::{self, Receiver};
18use itertools::Itertools;
19use raw_window_handle::{HasDisplayHandle, HasWindowHandle};
20use smallvec::SmallVec;
21use std::result::Result;
22use windows::{
23 core::*,
24 Win32::{
25 Foundation::*,
26 Graphics::Gdi::*,
27 System::{Com::*, Ole::*, SystemServices::*},
28 UI::{
29 Controls::*,
30 HiDpi::*,
31 Input::{Ime::*, KeyboardAndMouse::*},
32 Shell::*,
33 WindowsAndMessaging::*,
34 },
35 },
36};
37
38use crate::platform::blade::BladeRenderer;
39use crate::*;
40
41pub(crate) struct WindowsWindowInner {
42 hwnd: HWND,
43 origin: Cell<Point<GlobalPixels>>,
44 size: Cell<Size<GlobalPixels>>,
45 mouse_position: Cell<Point<Pixels>>,
46 input_handler: Cell<Option<PlatformInputHandler>>,
47 renderer: RefCell<BladeRenderer>,
48 callbacks: RefCell<Callbacks>,
49 platform_inner: Rc<WindowsPlatformInner>,
50 pub(crate) handle: AnyWindowHandle,
51 scale_factor: f32,
52 display: RefCell<Rc<WindowsDisplay>>,
53}
54
55impl WindowsWindowInner {
56 fn new(
57 hwnd: HWND,
58 cs: &CREATESTRUCTW,
59 platform_inner: Rc<WindowsPlatformInner>,
60 handle: AnyWindowHandle,
61 display: Rc<WindowsDisplay>,
62 ) -> Self {
63 let origin = Cell::new(Point::new((cs.x as f64).into(), (cs.y as f64).into()));
64 let size = Cell::new(Size {
65 width: (cs.cx as f64).into(),
66 height: (cs.cy as f64).into(),
67 });
68 let mouse_position = Cell::new(Point::default());
69 let input_handler = Cell::new(None);
70 struct RawWindow {
71 hwnd: *mut c_void,
72 }
73 unsafe impl blade_rwh::HasRawWindowHandle for RawWindow {
74 fn raw_window_handle(&self) -> blade_rwh::RawWindowHandle {
75 let mut handle = blade_rwh::Win32WindowHandle::empty();
76 handle.hwnd = self.hwnd;
77 handle.into()
78 }
79 }
80 unsafe impl blade_rwh::HasRawDisplayHandle for RawWindow {
81 fn raw_display_handle(&self) -> blade_rwh::RawDisplayHandle {
82 blade_rwh::WindowsDisplayHandle::empty().into()
83 }
84 }
85 let raw = RawWindow { hwnd: hwnd.0 as _ };
86 let gpu = Arc::new(
87 unsafe {
88 gpu::Context::init_windowed(
89 &raw,
90 gpu::ContextDesc {
91 validation: false,
92 capture: false,
93 overlay: false,
94 },
95 )
96 }
97 .unwrap(),
98 );
99 let extent = gpu::Extent {
100 width: 1,
101 height: 1,
102 depth: 1,
103 };
104 let renderer = RefCell::new(BladeRenderer::new(gpu, extent));
105 let callbacks = RefCell::new(Callbacks::default());
106 let display = RefCell::new(display);
107 Self {
108 hwnd,
109 origin,
110 size,
111 mouse_position,
112 input_handler,
113 renderer,
114 callbacks,
115 platform_inner,
116 handle,
117 scale_factor: 1.0,
118 display,
119 }
120 }
121
122 fn is_maximized(&self) -> bool {
123 let mut placement = WINDOWPLACEMENT::default();
124 placement.length = std::mem::size_of::<WINDOWPLACEMENT>() as u32;
125 if unsafe { GetWindowPlacement(self.hwnd, &mut placement) }.is_ok() {
126 return placement.showCmd == SW_SHOWMAXIMIZED.0 as u32;
127 }
128 return false;
129 }
130
131 fn get_titlebar_rect(&self) -> anyhow::Result<RECT> {
132 let top_and_bottom_borders = 2;
133 let theme = unsafe { OpenThemeData(self.hwnd, w!("WINDOW")) };
134 let title_bar_size = unsafe {
135 GetThemePartSize(
136 theme,
137 HDC::default(),
138 WP_CAPTION.0,
139 CS_ACTIVE.0,
140 None,
141 TS_TRUE,
142 )
143 }?;
144 unsafe { CloseThemeData(theme) }?;
145
146 let mut height =
147 (title_bar_size.cy as f32 * self.scale_factor).round() as i32 + top_and_bottom_borders;
148
149 if self.is_maximized() {
150 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
151 height += unsafe { (GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) * 2) as i32 };
152 }
153
154 let mut rect = RECT::default();
155 unsafe { GetClientRect(self.hwnd, &mut rect) }?;
156 rect.bottom = rect.top + height;
157 Ok(rect)
158 }
159
160 fn is_virtual_key_pressed(&self, vkey: VIRTUAL_KEY) -> bool {
161 unsafe { GetKeyState(vkey.0 as i32) < 0 }
162 }
163
164 fn current_modifiers(&self) -> Modifiers {
165 Modifiers {
166 control: self.is_virtual_key_pressed(VK_CONTROL),
167 alt: self.is_virtual_key_pressed(VK_MENU),
168 shift: self.is_virtual_key_pressed(VK_SHIFT),
169 command: self.is_virtual_key_pressed(VK_LWIN) || self.is_virtual_key_pressed(VK_RWIN),
170 function: false,
171 }
172 }
173
174 /// mark window client rect to be re-drawn
175 /// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-invalidaterect
176 pub(crate) fn invalidate_client_area(&self) {
177 unsafe { InvalidateRect(self.hwnd, None, FALSE) };
178 }
179
180 fn handle_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
181 log::debug!("msg: {msg}, wparam: {}, lparam: {}", wparam.0, lparam.0);
182 match msg {
183 WM_ACTIVATE => self.handle_activate_msg(msg, wparam, lparam),
184 WM_CREATE => self.handle_create_msg(lparam),
185 WM_SETFOCUS => self.handle_set_focus_msg(msg, wparam, lparam),
186 WM_MOVE => self.handle_move_msg(lparam),
187 WM_SIZE => self.handle_size_msg(lparam),
188 WM_NCCALCSIZE => self.handle_calc_client_size(msg, wparam, lparam),
189 WM_DPICHANGED => self.handle_dpi_changed_msg(msg, wparam, lparam),
190 WM_NCHITTEST => self.handle_hit_test_msg(msg, wparam, lparam),
191 WM_PAINT => self.handle_paint_msg(),
192 WM_CLOSE => self.handle_close_msg(msg, wparam, lparam),
193 WM_DESTROY => self.handle_destroy_msg(),
194 WM_MOUSEMOVE => self.handle_mouse_move_msg(lparam, wparam),
195 WM_NCMOUSEMOVE => self.handle_nc_mouse_move_msg(msg, wparam, lparam),
196 WM_NCLBUTTONDOWN => {
197 self.handle_nc_mouse_down_msg(MouseButton::Left, msg, wparam, lparam)
198 }
199 WM_NCRBUTTONDOWN => {
200 self.handle_nc_mouse_down_msg(MouseButton::Right, msg, wparam, lparam)
201 }
202 WM_NCMBUTTONDOWN => {
203 self.handle_nc_mouse_down_msg(MouseButton::Middle, msg, wparam, lparam)
204 }
205 WM_NCLBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Left, msg, wparam, lparam),
206 WM_NCRBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Right, msg, wparam, lparam),
207 WM_NCMBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Middle, msg, wparam, lparam),
208 WM_LBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Left, lparam),
209 WM_RBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Right, lparam),
210 WM_MBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Middle, lparam),
211 WM_XBUTTONDOWN => {
212 let nav_dir = match wparam.hiword() {
213 XBUTTON1 => Some(NavigationDirection::Forward),
214 XBUTTON2 => Some(NavigationDirection::Back),
215 _ => None,
216 };
217
218 if let Some(nav_dir) = nav_dir {
219 self.handle_mouse_down_msg(MouseButton::Navigate(nav_dir), lparam)
220 } else {
221 LRESULT(1)
222 }
223 }
224 WM_LBUTTONUP => self.handle_mouse_up_msg(MouseButton::Left, lparam),
225 WM_RBUTTONUP => self.handle_mouse_up_msg(MouseButton::Right, lparam),
226 WM_MBUTTONUP => self.handle_mouse_up_msg(MouseButton::Middle, lparam),
227 WM_XBUTTONUP => {
228 let nav_dir = match wparam.hiword() {
229 XBUTTON1 => Some(NavigationDirection::Back),
230 XBUTTON2 => Some(NavigationDirection::Forward),
231 _ => None,
232 };
233
234 if let Some(nav_dir) = nav_dir {
235 self.handle_mouse_up_msg(MouseButton::Navigate(nav_dir), lparam)
236 } else {
237 LRESULT(1)
238 }
239 }
240 WM_MOUSEWHEEL => self.handle_mouse_wheel_msg(wparam, lparam),
241 WM_MOUSEHWHEEL => self.handle_mouse_horizontal_wheel_msg(wparam, lparam),
242 WM_SYSKEYDOWN => self.handle_syskeydown_msg(msg, wparam, lparam),
243 WM_SYSKEYUP => self.handle_syskeyup_msg(msg, wparam, lparam),
244 WM_KEYDOWN => self.handle_keydown_msg(msg, wparam, lparam),
245 WM_KEYUP => self.handle_keyup_msg(msg, wparam),
246 WM_CHAR => self.handle_char_msg(msg, wparam, lparam),
247 WM_IME_STARTCOMPOSITION => self.handle_ime_position(),
248 WM_IME_COMPOSITION => self.handle_ime_composition(msg, wparam, lparam),
249 WM_IME_CHAR => self.handle_ime_char(wparam),
250 _ => unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) },
251 }
252 }
253
254 fn handle_move_msg(&self, lparam: LPARAM) -> LRESULT {
255 let x = lparam.signed_loword() as f64;
256 let y = lparam.signed_hiword() as f64;
257 self.origin.set(Point::new(x.into(), y.into()));
258 let size = self.size.get();
259 let center_x = x as f32 + size.width.0 / 2.0;
260 let center_y = y as f32 + size.height.0 / 2.0;
261 let monitor_bounds = self.display.borrow().bounds();
262 if center_x < monitor_bounds.left().0
263 || center_x > monitor_bounds.right().0
264 || center_y < monitor_bounds.top().0
265 || center_y > monitor_bounds.bottom().0
266 {
267 // center of the window may have moved to another monitor
268 let monitor = unsafe { MonitorFromWindow(self.hwnd, MONITOR_DEFAULTTONULL) };
269 if !monitor.is_invalid() && self.display.borrow().handle != monitor {
270 // we will get the same monitor if we only have one
271 (*self.display.borrow_mut()) = Rc::new(WindowsDisplay::new_with_handle(monitor));
272 }
273 }
274 let mut callbacks = self.callbacks.borrow_mut();
275 if let Some(callback) = callbacks.moved.as_mut() {
276 callback()
277 }
278 LRESULT(0)
279 }
280
281 fn handle_size_msg(&self, lparam: LPARAM) -> LRESULT {
282 let width = lparam.loword().max(1) as f64;
283 let height = lparam.hiword().max(1) as f64;
284 self.renderer
285 .borrow_mut()
286 .update_drawable_size(Size { width, height });
287 let width = width.into();
288 let height = height.into();
289 self.size.set(Size { width, height });
290 let mut callbacks = self.callbacks.borrow_mut();
291 if let Some(callback) = callbacks.resize.as_mut() {
292 callback(
293 Size {
294 width: Pixels(width.0),
295 height: Pixels(height.0),
296 },
297 1.0,
298 );
299 }
300 self.invalidate_client_area();
301 LRESULT(0)
302 }
303
304 fn handle_paint_msg(&self) -> LRESULT {
305 let mut paint_struct = PAINTSTRUCT::default();
306 let _hdc = unsafe { BeginPaint(self.hwnd, &mut paint_struct) };
307 let mut callbacks = self.callbacks.borrow_mut();
308 if let Some(request_frame) = callbacks.request_frame.as_mut() {
309 request_frame();
310 }
311 unsafe { EndPaint(self.hwnd, &paint_struct) };
312 LRESULT(0)
313 }
314
315 fn handle_close_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
316 let mut callbacks = self.callbacks.borrow_mut();
317 if let Some(callback) = callbacks.should_close.as_mut() {
318 if callback() {
319 return LRESULT(0);
320 }
321 }
322 drop(callbacks);
323 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
324 }
325
326 fn handle_destroy_msg(&self) -> LRESULT {
327 let mut callbacks = self.callbacks.borrow_mut();
328 if let Some(callback) = callbacks.close.take() {
329 callback()
330 }
331 let index = self
332 .platform_inner
333 .raw_window_handles
334 .read()
335 .iter()
336 .position(|handle| *handle == self.hwnd)
337 .unwrap();
338 self.platform_inner.raw_window_handles.write().remove(index);
339 if self.platform_inner.raw_window_handles.read().is_empty() {
340 self.platform_inner
341 .foreground_executor
342 .spawn(async {
343 unsafe { PostQuitMessage(0) };
344 })
345 .detach();
346 }
347 LRESULT(1)
348 }
349
350 fn handle_mouse_move_msg(&self, lparam: LPARAM, wparam: WPARAM) -> LRESULT {
351 let x = Pixels::from(lparam.signed_loword() as f32);
352 let y = Pixels::from(lparam.signed_hiword() as f32);
353 self.mouse_position.set(Point { x, y });
354 let mut callbacks = self.callbacks.borrow_mut();
355 if let Some(callback) = callbacks.input.as_mut() {
356 let pressed_button = match MODIFIERKEYS_FLAGS(wparam.loword() as u32) {
357 flags if flags.contains(MK_LBUTTON) => Some(MouseButton::Left),
358 flags if flags.contains(MK_RBUTTON) => Some(MouseButton::Right),
359 flags if flags.contains(MK_MBUTTON) => Some(MouseButton::Middle),
360 flags if flags.contains(MK_XBUTTON1) => {
361 Some(MouseButton::Navigate(NavigationDirection::Back))
362 }
363 flags if flags.contains(MK_XBUTTON2) => {
364 Some(MouseButton::Navigate(NavigationDirection::Forward))
365 }
366 _ => None,
367 };
368 let event = MouseMoveEvent {
369 position: Point { x, y },
370 pressed_button,
371 modifiers: self.current_modifiers(),
372 };
373 if callback(PlatformInput::MouseMove(event)).default_prevented {
374 return LRESULT(0);
375 }
376 }
377 LRESULT(1)
378 }
379
380 fn parse_syskeydown_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
381 let modifiers = self.current_modifiers();
382 if !modifiers.alt {
383 // on Windows, F10 can trigger this event, not just the alt key
384 // and we just don't care about F10
385 return None;
386 }
387
388 let vk_code = wparam.loword();
389 let basic_key = basic_vkcode_to_string(vk_code, modifiers);
390 if basic_key.is_some() {
391 return basic_key;
392 }
393
394 let key = match VIRTUAL_KEY(vk_code) {
395 VK_BACK => Some("backspace"),
396 VK_RETURN => Some("enter"),
397 VK_TAB => Some("tab"),
398 VK_UP => Some("up"),
399 VK_DOWN => Some("down"),
400 VK_RIGHT => Some("right"),
401 VK_LEFT => Some("left"),
402 VK_HOME => Some("home"),
403 VK_END => Some("end"),
404 VK_PRIOR => Some("pageup"),
405 VK_NEXT => Some("pagedown"),
406 VK_ESCAPE => Some("escape"),
407 VK_INSERT => Some("insert"),
408 _ => None,
409 };
410
411 if let Some(key) = key {
412 Some(Keystroke {
413 modifiers,
414 key: key.to_string(),
415 ime_key: None,
416 })
417 } else {
418 None
419 }
420 }
421
422 fn parse_keydown_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
423 let vk_code = wparam.loword();
424
425 let modifiers = self.current_modifiers();
426 if modifiers.control || modifiers.alt {
427 let basic_key = basic_vkcode_to_string(vk_code, modifiers);
428 if basic_key.is_some() {
429 return basic_key;
430 }
431 }
432
433 if vk_code >= VK_F1.0 && vk_code <= VK_F24.0 {
434 let offset = vk_code - VK_F1.0;
435 return Some(Keystroke {
436 modifiers,
437 key: format!("f{}", offset + 1),
438 ime_key: None,
439 });
440 }
441
442 let key = match VIRTUAL_KEY(vk_code) {
443 VK_BACK => Some("backspace"),
444 VK_RETURN => Some("enter"),
445 VK_TAB => Some("tab"),
446 VK_UP => Some("up"),
447 VK_DOWN => Some("down"),
448 VK_RIGHT => Some("right"),
449 VK_LEFT => Some("left"),
450 VK_HOME => Some("home"),
451 VK_END => Some("end"),
452 VK_PRIOR => Some("pageup"),
453 VK_NEXT => Some("pagedown"),
454 VK_ESCAPE => Some("escape"),
455 VK_INSERT => Some("insert"),
456 _ => None,
457 };
458
459 if let Some(key) = key {
460 Some(Keystroke {
461 modifiers,
462 key: key.to_string(),
463 ime_key: None,
464 })
465 } else {
466 None
467 }
468 }
469
470 fn parse_char_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
471 let src = [wparam.0 as u16];
472 let Ok(first_char) = char::decode_utf16(src).collect::<Vec<_>>()[0] else {
473 return None;
474 };
475 if first_char.is_control() {
476 None
477 } else {
478 let mut modifiers = self.current_modifiers();
479 // for characters that use 'shift' to type it is expected that the
480 // shift is not reported if the uppercase/lowercase are the same and instead only the key is reported
481 if first_char.to_lowercase().to_string() == first_char.to_uppercase().to_string() {
482 modifiers.shift = false;
483 }
484 Some(Keystroke {
485 modifiers,
486 key: first_char.to_lowercase().to_string(),
487 ime_key: Some(first_char.to_string()),
488 })
489 }
490 }
491
492 fn handle_syskeydown_msg(&self, message: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
493 // we need to call `DefWindowProcW`, or we will lose the system-wide `Alt+F4`, `Alt+{other keys}`
494 // shortcuts.
495 let Some(keystroke) = self.parse_syskeydown_msg_keystroke(wparam) else {
496 return unsafe { DefWindowProcW(self.hwnd, message, wparam, lparam) };
497 };
498 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
499 return unsafe { DefWindowProcW(self.hwnd, message, wparam, lparam) };
500 };
501 let event = KeyDownEvent {
502 keystroke,
503 is_held: lparam.0 & (0x1 << 30) > 0,
504 };
505 if func(PlatformInput::KeyDown(event)).default_prevented {
506 self.invalidate_client_area();
507 return LRESULT(0);
508 }
509 unsafe { DefWindowProcW(self.hwnd, message, wparam, lparam) }
510 }
511
512 fn handle_syskeyup_msg(&self, message: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
513 // we need to call `DefWindowProcW`, or we will lose the system-wide `Alt+F4`, `Alt+{other keys}`
514 // shortcuts.
515 let Some(keystroke) = self.parse_syskeydown_msg_keystroke(wparam) else {
516 return unsafe { DefWindowProcW(self.hwnd, message, wparam, lparam) };
517 };
518 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
519 return unsafe { DefWindowProcW(self.hwnd, message, wparam, lparam) };
520 };
521 let event = KeyUpEvent { keystroke };
522 if func(PlatformInput::KeyUp(event)).default_prevented {
523 self.invalidate_client_area();
524 return LRESULT(0);
525 }
526 unsafe { DefWindowProcW(self.hwnd, message, wparam, lparam) }
527 }
528
529 fn handle_keydown_msg(&self, _msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
530 let Some(keystroke) = self.parse_keydown_msg_keystroke(wparam) else {
531 return LRESULT(1);
532 };
533 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
534 return LRESULT(1);
535 };
536 let event = KeyDownEvent {
537 keystroke,
538 is_held: lparam.0 & (0x1 << 30) > 0,
539 };
540 if func(PlatformInput::KeyDown(event)).default_prevented {
541 self.invalidate_client_area();
542 return LRESULT(0);
543 }
544 LRESULT(1)
545 }
546
547 fn handle_keyup_msg(&self, _msg: u32, wparam: WPARAM) -> LRESULT {
548 let Some(keystroke) = self.parse_keydown_msg_keystroke(wparam) else {
549 return LRESULT(1);
550 };
551 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
552 return LRESULT(1);
553 };
554 let event = KeyUpEvent { keystroke };
555 if func(PlatformInput::KeyUp(event)).default_prevented {
556 self.invalidate_client_area();
557 return LRESULT(0);
558 }
559 LRESULT(1)
560 }
561
562 fn handle_char_msg(&self, _msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
563 let Some(keystroke) = self.parse_char_msg_keystroke(wparam) else {
564 return LRESULT(1);
565 };
566 let mut callbacks = self.callbacks.borrow_mut();
567 let Some(ref mut func) = callbacks.input else {
568 return LRESULT(1);
569 };
570 let ime_key = keystroke.ime_key.clone();
571 let event = KeyDownEvent {
572 keystroke,
573 is_held: lparam.0 & (0x1 << 30) > 0,
574 };
575 if func(PlatformInput::KeyDown(event)).default_prevented {
576 self.invalidate_client_area();
577 return LRESULT(0);
578 }
579 drop(callbacks);
580 let Some(ime_char) = ime_key else {
581 return LRESULT(1);
582 };
583 let Some(mut input_handler) = self.input_handler.take() else {
584 return LRESULT(1);
585 };
586 input_handler.replace_text_in_range(None, &ime_char);
587 self.input_handler.set(Some(input_handler));
588 self.invalidate_client_area();
589 LRESULT(0)
590 }
591
592 fn handle_mouse_down_msg(&self, button: MouseButton, lparam: LPARAM) -> LRESULT {
593 let mut callbacks = self.callbacks.borrow_mut();
594 if let Some(callback) = callbacks.input.as_mut() {
595 let x = Pixels::from(lparam.signed_loword() as f32);
596 let y = Pixels::from(lparam.signed_hiword() as f32);
597 let event = MouseDownEvent {
598 button,
599 position: Point { x, y },
600 modifiers: self.current_modifiers(),
601 click_count: 1,
602 };
603 if callback(PlatformInput::MouseDown(event)).default_prevented {
604 return LRESULT(0);
605 }
606 }
607 LRESULT(1)
608 }
609
610 fn handle_mouse_up_msg(&self, button: MouseButton, lparam: LPARAM) -> LRESULT {
611 let mut callbacks = self.callbacks.borrow_mut();
612 if let Some(callback) = callbacks.input.as_mut() {
613 let x = Pixels::from(lparam.signed_loword() as f32);
614 let y = Pixels::from(lparam.signed_hiword() as f32);
615 let event = MouseUpEvent {
616 button,
617 position: Point { x, y },
618 modifiers: self.current_modifiers(),
619 click_count: 1,
620 };
621 if callback(PlatformInput::MouseUp(event)).default_prevented {
622 return LRESULT(0);
623 }
624 }
625 LRESULT(1)
626 }
627
628 fn handle_mouse_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
629 let mut callbacks = self.callbacks.borrow_mut();
630 if let Some(callback) = callbacks.input.as_mut() {
631 let x = Pixels::from(lparam.signed_loword() as f32);
632 let y = Pixels::from(lparam.signed_hiword() as f32);
633 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
634 * self.platform_inner.settings.borrow().wheel_scroll_lines as f32;
635 let event = crate::ScrollWheelEvent {
636 position: Point { x, y },
637 delta: ScrollDelta::Lines(Point {
638 x: 0.0,
639 y: wheel_distance,
640 }),
641 modifiers: self.current_modifiers(),
642 touch_phase: TouchPhase::Moved,
643 };
644 callback(PlatformInput::ScrollWheel(event));
645 return LRESULT(0);
646 }
647 LRESULT(1)
648 }
649
650 fn handle_mouse_horizontal_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
651 let mut callbacks = self.callbacks.borrow_mut();
652 if let Some(callback) = callbacks.input.as_mut() {
653 let x = Pixels::from(lparam.signed_loword() as f32);
654 let y = Pixels::from(lparam.signed_hiword() as f32);
655 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
656 * self.platform_inner.settings.borrow().wheel_scroll_chars as f32;
657 let event = crate::ScrollWheelEvent {
658 position: Point { x, y },
659 delta: ScrollDelta::Lines(Point {
660 x: wheel_distance,
661 y: 0.0,
662 }),
663 modifiers: self.current_modifiers(),
664 touch_phase: TouchPhase::Moved,
665 };
666 if callback(PlatformInput::ScrollWheel(event)).default_prevented {
667 return LRESULT(0);
668 }
669 }
670 LRESULT(1)
671 }
672
673 fn handle_ime_position(&self) -> LRESULT {
674 unsafe {
675 let ctx = ImmGetContext(self.hwnd);
676 let Some(mut input_handler) = self.input_handler.take() else {
677 return LRESULT(1);
678 };
679 // we are composing, this should never fail
680 let caret_range = input_handler.selected_text_range().unwrap();
681 let caret_position = input_handler.bounds_for_range(caret_range).unwrap();
682 self.input_handler.set(Some(input_handler));
683 let config = CANDIDATEFORM {
684 dwStyle: CFS_CANDIDATEPOS,
685 ptCurrentPos: POINT {
686 x: caret_position.origin.x.0 as i32,
687 y: caret_position.origin.y.0 as i32 + (caret_position.size.height.0 as i32 / 2),
688 },
689 ..Default::default()
690 };
691 ImmSetCandidateWindow(ctx, &config as _);
692 ImmReleaseContext(self.hwnd, ctx);
693 LRESULT(0)
694 }
695 }
696
697 fn parse_ime_compostion_string(&self) -> Option<(String, usize)> {
698 unsafe {
699 let ctx = ImmGetContext(self.hwnd);
700 let string_len = ImmGetCompositionStringW(ctx, GCS_COMPSTR, None, 0);
701 let result = if string_len >= 0 {
702 let mut buffer = vec![0u8; string_len as usize + 2];
703 // let mut buffer = [0u8; MAX_PATH as _];
704 ImmGetCompositionStringW(
705 ctx,
706 GCS_COMPSTR,
707 Some(buffer.as_mut_ptr() as _),
708 string_len as _,
709 );
710 let wstring = std::slice::from_raw_parts::<u16>(
711 buffer.as_mut_ptr().cast::<u16>(),
712 string_len as usize / 2,
713 );
714 let string = String::from_utf16_lossy(wstring);
715 Some((string, string_len as usize / 2))
716 } else {
717 None
718 };
719 ImmReleaseContext(self.hwnd, ctx);
720 result
721 }
722 }
723
724 fn handle_ime_composition(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
725 if lparam.0 as u32 & GCS_COMPSTR.0 > 0 {
726 let Some((string, string_len)) = self.parse_ime_compostion_string() else {
727 return unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
728 };
729 let Some(mut input_handler) = self.input_handler.take() else {
730 return unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
731 };
732 input_handler.replace_and_mark_text_in_range(
733 None,
734 string.as_str(),
735 Some(0..string_len),
736 );
737 self.input_handler.set(Some(input_handler));
738 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
739 } else {
740 // currently, we don't care other stuff
741 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
742 }
743 }
744
745 fn parse_ime_char(&self, wparam: WPARAM) -> Option<String> {
746 let src = [wparam.0 as u16];
747 let Ok(first_char) = char::decode_utf16(src).collect::<Vec<_>>()[0] else {
748 return None;
749 };
750 Some(first_char.to_string())
751 }
752
753 fn handle_ime_char(&self, wparam: WPARAM) -> LRESULT {
754 let Some(ime_char) = self.parse_ime_char(wparam) else {
755 return LRESULT(1);
756 };
757 let Some(mut input_handler) = self.input_handler.take() else {
758 return LRESULT(1);
759 };
760 input_handler.replace_text_in_range(None, &ime_char);
761 self.input_handler.set(Some(input_handler));
762 self.invalidate_client_area();
763 LRESULT(0)
764 }
765
766 fn handle_drag_drop(&self, input: PlatformInput) {
767 let mut callbacks = self.callbacks.borrow_mut();
768 let Some(ref mut func) = callbacks.input else {
769 return;
770 };
771 func(input);
772 }
773
774 /// SEE: https://learn.microsoft.com/en-us/windows/win32/winmsg/wm-nccalcsize
775 fn handle_calc_client_size(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
776 if wparam.0 == 0 {
777 return unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
778 }
779
780 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
781
782 let frame_x = unsafe { GetSystemMetricsForDpi(SM_CXFRAME, dpi) };
783 let frame_y = unsafe { GetSystemMetricsForDpi(SM_CYFRAME, dpi) };
784 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) };
785
786 // wparam is TRUE so lparam points to an NCCALCSIZE_PARAMS structure
787 let mut params = lparam.0 as *mut NCCALCSIZE_PARAMS;
788 let mut requested_client_rect = unsafe { &mut ((*params).rgrc) };
789
790 requested_client_rect[0].right -= frame_x + padding;
791 requested_client_rect[0].left += frame_x + padding;
792 requested_client_rect[0].bottom -= frame_y + padding;
793
794 LRESULT(0)
795 }
796
797 fn handle_activate_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
798 if let Some(titlebar_rect) = self.get_titlebar_rect().log_err() {
799 unsafe { InvalidateRect(self.hwnd, Some(&titlebar_rect), FALSE) };
800 }
801 return unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
802 }
803
804 fn handle_create_msg(&self, _lparam: LPARAM) -> LRESULT {
805 let mut size_rect = RECT::default();
806 unsafe { GetWindowRect(self.hwnd, &mut size_rect).log_err() };
807 let width = size_rect.right - size_rect.left;
808 let height = size_rect.bottom - size_rect.top;
809
810 self.size.set(Size {
811 width: GlobalPixels::from(width as f64),
812 height: GlobalPixels::from(height as f64),
813 });
814
815 // Inform the application of the frame change to force redrawing with the new
816 // client area that is extended into the title bar
817 unsafe {
818 SetWindowPos(
819 self.hwnd,
820 HWND::default(),
821 size_rect.left,
822 size_rect.top,
823 width,
824 height,
825 SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE,
826 )
827 .log_err()
828 };
829 LRESULT(0)
830 }
831
832 fn handle_dpi_changed_msg(&self, _msg: u32, _wparam: WPARAM, _lparam: LPARAM) -> LRESULT {
833 LRESULT(1)
834 }
835
836 fn handle_hit_test_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
837 // default handler for resize areas
838 let hit = unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
839 if matches!(
840 hit.0 as u32,
841 HTNOWHERE
842 | HTRIGHT
843 | HTLEFT
844 | HTTOPLEFT
845 | HTTOP
846 | HTTOPRIGHT
847 | HTBOTTOMRIGHT
848 | HTBOTTOM
849 | HTBOTTOMLEFT
850 ) {
851 return hit;
852 }
853
854 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
855 let frame_y = unsafe { GetSystemMetricsForDpi(SM_CYFRAME, dpi) };
856 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) };
857
858 let mut cursor_point = POINT {
859 x: lparam.signed_loword().into(),
860 y: lparam.signed_hiword().into(),
861 };
862 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
863 if cursor_point.y > 0 && cursor_point.y < frame_y + padding {
864 return LRESULT(HTTOP as _);
865 }
866
867 let titlebar_rect = self.get_titlebar_rect();
868 if let Ok(titlebar_rect) = titlebar_rect {
869 if cursor_point.y < titlebar_rect.bottom {
870 let caption_btn_width = unsafe { GetSystemMetricsForDpi(SM_CXSIZE, dpi) };
871 if cursor_point.x >= titlebar_rect.right - caption_btn_width {
872 return LRESULT(HTCLOSE as _);
873 } else if cursor_point.x >= titlebar_rect.right - caption_btn_width * 2 {
874 return LRESULT(HTMAXBUTTON as _);
875 } else if cursor_point.x >= titlebar_rect.right - caption_btn_width * 3 {
876 return LRESULT(HTMINBUTTON as _);
877 }
878
879 return LRESULT(HTCAPTION as _);
880 }
881 }
882
883 LRESULT(HTCLIENT as _)
884 }
885
886 fn handle_nc_mouse_move_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
887 let mut cursor_point = POINT {
888 x: lparam.signed_loword().into(),
889 y: lparam.signed_hiword().into(),
890 };
891 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
892 let x = Pixels::from(cursor_point.x as f32);
893 let y = Pixels::from(cursor_point.y as f32);
894 self.mouse_position.set(Point { x, y });
895 let mut callbacks = self.callbacks.borrow_mut();
896 if let Some(callback) = callbacks.input.as_mut() {
897 let event = MouseMoveEvent {
898 position: Point { x, y },
899 pressed_button: None,
900 modifiers: self.current_modifiers(),
901 };
902 if callback(PlatformInput::MouseMove(event)).default_prevented {
903 return LRESULT(0);
904 }
905 }
906 drop(callbacks);
907 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
908 }
909
910 fn handle_nc_mouse_down_msg(
911 &self,
912 button: MouseButton,
913 msg: u32,
914 wparam: WPARAM,
915 lparam: LPARAM,
916 ) -> LRESULT {
917 let mut callbacks = self.callbacks.borrow_mut();
918 if let Some(callback) = callbacks.input.as_mut() {
919 let mut cursor_point = POINT {
920 x: lparam.signed_loword().into(),
921 y: lparam.signed_hiword().into(),
922 };
923 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
924 let x = Pixels::from(cursor_point.x as f32);
925 let y = Pixels::from(cursor_point.y as f32);
926 let event = MouseDownEvent {
927 button,
928 position: Point { x, y },
929 modifiers: self.current_modifiers(),
930 click_count: 1,
931 };
932 if callback(PlatformInput::MouseDown(event)).default_prevented {
933 return LRESULT(0);
934 }
935 }
936 drop(callbacks);
937
938 match wparam.0 as u32 {
939 // Since these are handled in handle_nc_mouse_up_msg we must prevent the default window proc
940 HTMINBUTTON | HTMAXBUTTON | HTCLOSE => LRESULT(0),
941 _ => unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) },
942 }
943 }
944
945 fn handle_nc_mouse_up_msg(
946 &self,
947 button: MouseButton,
948 msg: u32,
949 wparam: WPARAM,
950 lparam: LPARAM,
951 ) -> LRESULT {
952 let mut callbacks = self.callbacks.borrow_mut();
953 if let Some(callback) = callbacks.input.as_mut() {
954 let mut cursor_point = POINT {
955 x: lparam.signed_loword().into(),
956 y: lparam.signed_hiword().into(),
957 };
958 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
959 let x = Pixels::from(cursor_point.x as f32);
960 let y = Pixels::from(cursor_point.y as f32);
961 let event = MouseUpEvent {
962 button,
963 position: Point { x, y },
964 modifiers: self.current_modifiers(),
965 click_count: 1,
966 };
967 if callback(PlatformInput::MouseUp(event)).default_prevented {
968 return LRESULT(0);
969 }
970 }
971 drop(callbacks);
972
973 if button == MouseButton::Left {
974 match wparam.0 as u32 {
975 HTMINBUTTON => unsafe {
976 ShowWindowAsync(self.hwnd, SW_MINIMIZE);
977 return LRESULT(0);
978 },
979 HTMAXBUTTON => unsafe {
980 if self.is_maximized() {
981 ShowWindowAsync(self.hwnd, SW_NORMAL);
982 } else {
983 ShowWindowAsync(self.hwnd, SW_MAXIMIZE);
984 }
985 return LRESULT(0);
986 },
987 HTCLOSE => unsafe {
988 PostMessageW(self.hwnd, WM_CLOSE, WPARAM::default(), LPARAM::default())
989 .log_err();
990 return LRESULT(0);
991 },
992 _ => {}
993 };
994 }
995
996 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
997 }
998
999 fn handle_set_focus_msg(&self, _msg: u32, wparam: WPARAM, _lparam: LPARAM) -> LRESULT {
1000 // wparam is the window that just lost focus (may be null)
1001 // SEE: https://learn.microsoft.com/en-us/windows/win32/inputdev/wm-setfocus
1002 let lost_focus_hwnd = HWND(wparam.0 as isize);
1003 if let Some(lost_focus_window) = self
1004 .platform_inner
1005 .try_get_windows_inner_from_hwnd(lost_focus_hwnd)
1006 {
1007 let mut callbacks = lost_focus_window.callbacks.borrow_mut();
1008 if let Some(mut cb) = callbacks.active_status_change.as_mut() {
1009 cb(false);
1010 }
1011 }
1012
1013 let mut callbacks = self.callbacks.borrow_mut();
1014 if let Some(mut cb) = callbacks.active_status_change.as_mut() {
1015 cb(true);
1016 }
1017
1018 LRESULT(0)
1019 }
1020}
1021
1022#[derive(Default)]
1023struct Callbacks {
1024 request_frame: Option<Box<dyn FnMut()>>,
1025 input: Option<Box<dyn FnMut(crate::PlatformInput) -> DispatchEventResult>>,
1026 active_status_change: Option<Box<dyn FnMut(bool)>>,
1027 resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
1028 fullscreen: Option<Box<dyn FnMut(bool)>>,
1029 moved: Option<Box<dyn FnMut()>>,
1030 should_close: Option<Box<dyn FnMut() -> bool>>,
1031 close: Option<Box<dyn FnOnce()>>,
1032 appearance_changed: Option<Box<dyn FnMut()>>,
1033}
1034
1035pub(crate) struct WindowsWindow {
1036 inner: Rc<WindowsWindowInner>,
1037 drag_drop_handler: IDropTarget,
1038}
1039
1040struct WindowCreateContext {
1041 inner: Option<Rc<WindowsWindowInner>>,
1042 platform_inner: Rc<WindowsPlatformInner>,
1043 handle: AnyWindowHandle,
1044 display: Rc<WindowsDisplay>,
1045}
1046
1047impl WindowsWindow {
1048 pub(crate) fn new(
1049 platform_inner: Rc<WindowsPlatformInner>,
1050 handle: AnyWindowHandle,
1051 options: WindowParams,
1052 ) -> Self {
1053 let classname = register_wnd_class();
1054 let windowname = HSTRING::from(
1055 options
1056 .titlebar
1057 .as_ref()
1058 .and_then(|titlebar| titlebar.title.as_ref())
1059 .map(|title| title.as_ref())
1060 .unwrap_or(""),
1061 );
1062 let dwstyle = WS_THICKFRAME | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX;
1063 let x = options.bounds.origin.x.0 as i32;
1064 let y = options.bounds.origin.y.0 as i32;
1065 let nwidth = options.bounds.size.width.0 as i32;
1066 let nheight = options.bounds.size.height.0 as i32;
1067 let hwndparent = HWND::default();
1068 let hmenu = HMENU::default();
1069 let hinstance = HINSTANCE::default();
1070 let mut context = WindowCreateContext {
1071 inner: None,
1072 platform_inner: platform_inner.clone(),
1073 handle,
1074 // todo(windows) move window to target monitor
1075 // options.display_id
1076 display: Rc::new(WindowsDisplay::primary_monitor().unwrap()),
1077 };
1078 let lpparam = Some(&context as *const _ as *const _);
1079 unsafe {
1080 CreateWindowExW(
1081 WS_EX_APPWINDOW,
1082 classname,
1083 &windowname,
1084 dwstyle,
1085 x,
1086 y,
1087 nwidth,
1088 nheight,
1089 hwndparent,
1090 hmenu,
1091 hinstance,
1092 lpparam,
1093 )
1094 };
1095 let drag_drop_handler = {
1096 let inner = context.inner.as_ref().unwrap();
1097 let handler = WindowsDragDropHandler(Rc::clone(inner));
1098 let drag_drop_handler: IDropTarget = handler.into();
1099 unsafe {
1100 RegisterDragDrop(inner.hwnd, &drag_drop_handler)
1101 .expect("unable to register drag-drop event")
1102 };
1103 drag_drop_handler
1104 };
1105 let wnd = Self {
1106 inner: context.inner.unwrap(),
1107 drag_drop_handler,
1108 };
1109 platform_inner
1110 .raw_window_handles
1111 .write()
1112 .push(wnd.inner.hwnd);
1113
1114 unsafe { ShowWindow(wnd.inner.hwnd, SW_SHOW) };
1115 wnd
1116 }
1117
1118 fn maximize(&self) {
1119 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MAXIMIZE) };
1120 }
1121}
1122
1123impl HasWindowHandle for WindowsWindow {
1124 fn window_handle(
1125 &self,
1126 ) -> Result<raw_window_handle::WindowHandle<'_>, raw_window_handle::HandleError> {
1127 let raw = raw_window_handle::Win32WindowHandle::new(unsafe {
1128 NonZeroIsize::new_unchecked(self.inner.hwnd.0)
1129 })
1130 .into();
1131 Ok(unsafe { raw_window_handle::WindowHandle::borrow_raw(raw) })
1132 }
1133}
1134
1135// todo(windows)
1136impl HasDisplayHandle for WindowsWindow {
1137 fn display_handle(
1138 &self,
1139 ) -> Result<raw_window_handle::DisplayHandle<'_>, raw_window_handle::HandleError> {
1140 unimplemented!()
1141 }
1142}
1143
1144impl Drop for WindowsWindow {
1145 fn drop(&mut self) {
1146 unsafe {
1147 let _ = RevokeDragDrop(self.inner.hwnd);
1148 }
1149 }
1150}
1151
1152impl PlatformWindow for WindowsWindow {
1153 fn bounds(&self) -> Bounds<GlobalPixels> {
1154 Bounds {
1155 origin: self.inner.origin.get(),
1156 size: self.inner.size.get(),
1157 }
1158 }
1159
1160 fn is_maximized(&self) -> bool {
1161 self.inner.is_maximized()
1162 }
1163
1164 // todo(windows)
1165 fn content_size(&self) -> Size<Pixels> {
1166 let size = self.inner.size.get();
1167 Size {
1168 width: size.width.0.into(),
1169 height: size.height.0.into(),
1170 }
1171 }
1172
1173 // todo(windows)
1174 fn scale_factor(&self) -> f32 {
1175 self.inner.scale_factor
1176 }
1177
1178 // todo(windows)
1179 fn appearance(&self) -> WindowAppearance {
1180 WindowAppearance::Dark
1181 }
1182
1183 fn display(&self) -> Rc<dyn PlatformDisplay> {
1184 self.inner.display.borrow().clone()
1185 }
1186
1187 fn mouse_position(&self) -> Point<Pixels> {
1188 self.inner.mouse_position.get()
1189 }
1190
1191 // todo(windows)
1192 fn modifiers(&self) -> Modifiers {
1193 Modifiers::none()
1194 }
1195
1196 fn as_any_mut(&mut self) -> &mut dyn Any {
1197 self
1198 }
1199
1200 // todo(windows)
1201 fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
1202 self.inner.input_handler.set(Some(input_handler));
1203 }
1204
1205 // todo(windows)
1206 fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
1207 self.inner.input_handler.take()
1208 }
1209
1210 fn prompt(
1211 &self,
1212 level: PromptLevel,
1213 msg: &str,
1214 detail: Option<&str>,
1215 answers: &[&str],
1216 ) -> Option<Receiver<usize>> {
1217 let (done_tx, done_rx) = oneshot::channel();
1218 let msg = msg.to_string();
1219 let detail_string = match detail {
1220 Some(info) => Some(info.to_string()),
1221 None => None,
1222 };
1223 let answers = answers.iter().map(|s| s.to_string()).collect::<Vec<_>>();
1224 let handle = self.inner.hwnd;
1225 self.inner
1226 .platform_inner
1227 .foreground_executor
1228 .spawn(async move {
1229 unsafe {
1230 let mut config;
1231 config = std::mem::zeroed::<TASKDIALOGCONFIG>();
1232 config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
1233 config.hwndParent = handle;
1234 let title;
1235 let main_icon;
1236 match level {
1237 crate::PromptLevel::Info => {
1238 title = windows::core::w!("Info");
1239 main_icon = TD_INFORMATION_ICON;
1240 }
1241 crate::PromptLevel::Warning => {
1242 title = windows::core::w!("Warning");
1243 main_icon = TD_WARNING_ICON;
1244 }
1245 crate::PromptLevel::Critical => {
1246 title = windows::core::w!("Critical");
1247 main_icon = TD_ERROR_ICON;
1248 }
1249 };
1250 config.pszWindowTitle = title;
1251 config.Anonymous1.pszMainIcon = main_icon;
1252 let instruction = msg.encode_utf16().chain(once(0)).collect_vec();
1253 config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
1254 let hints_encoded;
1255 if let Some(ref hints) = detail_string {
1256 hints_encoded = hints.encode_utf16().chain(once(0)).collect_vec();
1257 config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
1258 };
1259 let mut buttons = Vec::new();
1260 let mut btn_encoded = Vec::new();
1261 for (index, btn_string) in answers.iter().enumerate() {
1262 let encoded = btn_string.encode_utf16().chain(once(0)).collect_vec();
1263 buttons.push(TASKDIALOG_BUTTON {
1264 nButtonID: index as _,
1265 pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
1266 });
1267 btn_encoded.push(encoded);
1268 }
1269 config.cButtons = buttons.len() as _;
1270 config.pButtons = buttons.as_ptr();
1271
1272 config.pfCallback = None;
1273 let mut res = std::mem::zeroed();
1274 let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
1275 .inspect_err(|e| log::error!("unable to create task dialog: {}", e));
1276
1277 let _ = done_tx.send(res as usize);
1278 }
1279 })
1280 .detach();
1281
1282 Some(done_rx)
1283 }
1284
1285 fn activate(&self) {
1286 unsafe { SetActiveWindow(self.inner.hwnd) };
1287 unsafe { SetFocus(self.inner.hwnd) };
1288 unsafe { SetForegroundWindow(self.inner.hwnd) };
1289 }
1290
1291 // todo(windows)
1292 fn set_title(&mut self, title: &str) {
1293 unsafe { SetWindowTextW(self.inner.hwnd, &HSTRING::from(title)) }
1294 .inspect_err(|e| log::error!("Set title failed: {e}"))
1295 .ok();
1296 }
1297
1298 // todo(windows)
1299 fn set_edited(&mut self, _edited: bool) {}
1300
1301 // todo(windows)
1302 fn show_character_palette(&self) {}
1303
1304 fn minimize(&self) {
1305 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MINIMIZE) };
1306 }
1307
1308 fn zoom(&self) {
1309 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MAXIMIZE) };
1310 }
1311
1312 // todo(windows)
1313 fn toggle_fullscreen(&self) {}
1314
1315 // todo(windows)
1316 fn is_fullscreen(&self) -> bool {
1317 false
1318 }
1319
1320 // todo(windows)
1321 fn on_request_frame(&self, callback: Box<dyn FnMut()>) {
1322 self.inner.callbacks.borrow_mut().request_frame = Some(callback);
1323 }
1324
1325 // todo(windows)
1326 fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> DispatchEventResult>) {
1327 self.inner.callbacks.borrow_mut().input = Some(callback);
1328 }
1329
1330 // todo(windows)
1331 fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
1332 self.inner.callbacks.borrow_mut().active_status_change = Some(callback);
1333 }
1334
1335 // todo(windows)
1336 fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
1337 self.inner.callbacks.borrow_mut().resize = Some(callback);
1338 }
1339
1340 // todo(windows)
1341 fn on_fullscreen(&self, callback: Box<dyn FnMut(bool)>) {
1342 self.inner.callbacks.borrow_mut().fullscreen = Some(callback);
1343 }
1344
1345 // todo(windows)
1346 fn on_moved(&self, callback: Box<dyn FnMut()>) {
1347 self.inner.callbacks.borrow_mut().moved = Some(callback);
1348 }
1349
1350 // todo(windows)
1351 fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
1352 self.inner.callbacks.borrow_mut().should_close = Some(callback);
1353 }
1354
1355 // todo(windows)
1356 fn on_close(&self, callback: Box<dyn FnOnce()>) {
1357 self.inner.callbacks.borrow_mut().close = Some(callback);
1358 }
1359
1360 // todo(windows)
1361 fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
1362 self.inner.callbacks.borrow_mut().appearance_changed = Some(callback);
1363 }
1364
1365 // todo(windows)
1366 fn is_topmost_for_position(&self, _position: Point<Pixels>) -> bool {
1367 true
1368 }
1369
1370 // todo(windows)
1371 fn draw(&self, scene: &Scene) {
1372 self.inner.renderer.borrow_mut().draw(scene)
1373 }
1374
1375 // todo(windows)
1376 fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
1377 self.inner.renderer.borrow().sprite_atlas().clone()
1378 }
1379
1380 fn get_raw_handle(&self) -> HWND {
1381 self.inner.hwnd
1382 }
1383}
1384
1385#[implement(IDropTarget)]
1386struct WindowsDragDropHandler(pub Rc<WindowsWindowInner>);
1387
1388#[allow(non_snake_case)]
1389impl IDropTarget_Impl for WindowsDragDropHandler {
1390 fn DragEnter(
1391 &self,
1392 pdataobj: Option<&IDataObject>,
1393 _grfkeystate: MODIFIERKEYS_FLAGS,
1394 pt: &POINTL,
1395 pdweffect: *mut DROPEFFECT,
1396 ) -> windows::core::Result<()> {
1397 unsafe {
1398 let Some(idata_obj) = pdataobj else {
1399 log::info!("no dragging file or directory detected");
1400 return Ok(());
1401 };
1402 let config = FORMATETC {
1403 cfFormat: CF_HDROP.0,
1404 ptd: std::ptr::null_mut() as _,
1405 dwAspect: DVASPECT_CONTENT.0,
1406 lindex: -1,
1407 tymed: TYMED_HGLOBAL.0 as _,
1408 };
1409 let mut paths = SmallVec::<[PathBuf; 2]>::new();
1410 if idata_obj.QueryGetData(&config as _) == S_OK {
1411 *pdweffect = DROPEFFECT_LINK;
1412 let Ok(mut idata) = idata_obj.GetData(&config as _) else {
1413 return Ok(());
1414 };
1415 if idata.u.hGlobal.is_invalid() {
1416 return Ok(());
1417 }
1418 let hdrop = idata.u.hGlobal.0 as *mut HDROP;
1419 let file_count = DragQueryFileW(*hdrop, DRAGDROP_GET_FILES_COUNT, None);
1420 for file_index in 0..file_count {
1421 let filename_length = DragQueryFileW(*hdrop, file_index, None) as usize;
1422 let mut buffer = vec![0u16; filename_length + 1];
1423 let ret = DragQueryFileW(*hdrop, file_index, Some(buffer.as_mut_slice()));
1424 if ret == 0 {
1425 log::error!("unable to read file name");
1426 continue;
1427 }
1428 if let Ok(file_name) = String::from_utf16(&buffer[0..filename_length]) {
1429 if let Ok(path) = PathBuf::from_str(&file_name) {
1430 paths.push(path);
1431 }
1432 }
1433 }
1434 ReleaseStgMedium(&mut idata);
1435 let input = PlatformInput::FileDrop(crate::FileDropEvent::Entered {
1436 position: Point {
1437 x: Pixels(pt.x as _),
1438 y: Pixels(pt.y as _),
1439 },
1440 paths: crate::ExternalPaths(paths),
1441 });
1442 self.0.handle_drag_drop(input);
1443 } else {
1444 *pdweffect = DROPEFFECT_NONE;
1445 }
1446 }
1447 Ok(())
1448 }
1449
1450 fn DragOver(
1451 &self,
1452 _grfkeystate: MODIFIERKEYS_FLAGS,
1453 pt: &POINTL,
1454 _pdweffect: *mut DROPEFFECT,
1455 ) -> windows::core::Result<()> {
1456 let input = PlatformInput::FileDrop(crate::FileDropEvent::Pending {
1457 position: Point {
1458 x: Pixels(pt.x as _),
1459 y: Pixels(pt.y as _),
1460 },
1461 });
1462 self.0.handle_drag_drop(input);
1463
1464 Ok(())
1465 }
1466
1467 fn DragLeave(&self) -> windows::core::Result<()> {
1468 let input = PlatformInput::FileDrop(crate::FileDropEvent::Exited);
1469 self.0.handle_drag_drop(input);
1470
1471 Ok(())
1472 }
1473
1474 fn Drop(
1475 &self,
1476 _pdataobj: Option<&IDataObject>,
1477 _grfkeystate: MODIFIERKEYS_FLAGS,
1478 pt: &POINTL,
1479 _pdweffect: *mut DROPEFFECT,
1480 ) -> windows::core::Result<()> {
1481 let input = PlatformInput::FileDrop(crate::FileDropEvent::Submit {
1482 position: Point {
1483 x: Pixels(pt.x as _),
1484 y: Pixels(pt.y as _),
1485 },
1486 });
1487 self.0.handle_drag_drop(input);
1488
1489 Ok(())
1490 }
1491}
1492
1493fn register_wnd_class() -> PCWSTR {
1494 const CLASS_NAME: PCWSTR = w!("Zed::Window");
1495
1496 static ONCE: Once = Once::new();
1497 ONCE.call_once(|| {
1498 let wc = WNDCLASSW {
1499 lpfnWndProc: Some(wnd_proc),
1500 hCursor: unsafe { LoadCursorW(None, IDC_ARROW).ok().unwrap() },
1501 lpszClassName: PCWSTR(CLASS_NAME.as_ptr()),
1502 style: CS_HREDRAW | CS_VREDRAW,
1503 ..Default::default()
1504 };
1505 unsafe { RegisterClassW(&wc) };
1506 });
1507
1508 CLASS_NAME
1509}
1510
1511unsafe extern "system" fn wnd_proc(
1512 hwnd: HWND,
1513 msg: u32,
1514 wparam: WPARAM,
1515 lparam: LPARAM,
1516) -> LRESULT {
1517 if msg == WM_NCCREATE {
1518 let cs = lparam.0 as *const CREATESTRUCTW;
1519 let cs = unsafe { &*cs };
1520 let ctx = cs.lpCreateParams as *mut WindowCreateContext;
1521 let ctx = unsafe { &mut *ctx };
1522 let inner = Rc::new(WindowsWindowInner::new(
1523 hwnd,
1524 cs,
1525 ctx.platform_inner.clone(),
1526 ctx.handle,
1527 ctx.display.clone(),
1528 ));
1529 let weak = Box::new(Rc::downgrade(&inner));
1530 unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
1531 ctx.inner = Some(inner);
1532 return LRESULT(1);
1533 }
1534 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1535 if ptr.is_null() {
1536 return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
1537 }
1538 let inner = unsafe { &*ptr };
1539 let r = if let Some(inner) = inner.upgrade() {
1540 inner.handle_msg(msg, wparam, lparam)
1541 } else {
1542 unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
1543 };
1544 if msg == WM_NCDESTROY {
1545 unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
1546 unsafe { std::mem::drop(Box::from_raw(ptr)) };
1547 }
1548 r
1549}
1550
1551pub(crate) fn try_get_window_inner(hwnd: HWND) -> Option<Rc<WindowsWindowInner>> {
1552 if hwnd == HWND(0) {
1553 return None;
1554 }
1555
1556 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1557 if !ptr.is_null() {
1558 let inner = unsafe { &*ptr };
1559 inner.upgrade()
1560 } else {
1561 None
1562 }
1563}
1564
1565fn basic_vkcode_to_string(code: u16, modifiers: Modifiers) -> Option<Keystroke> {
1566 match code {
1567 // VK_0 - VK_9
1568 48..=57 => Some(Keystroke {
1569 modifiers,
1570 key: format!("{}", code - VK_0.0),
1571 ime_key: None,
1572 }),
1573 // VK_A - VK_Z
1574 65..=90 => Some(Keystroke {
1575 modifiers,
1576 key: format!("{}", (b'a' + code as u8 - VK_A.0 as u8) as char),
1577 ime_key: None,
1578 }),
1579 // VK_F1 - VK_F24
1580 112..=135 => Some(Keystroke {
1581 modifiers,
1582 key: format!("f{}", code - VK_F1.0 + 1),
1583 ime_key: None,
1584 }),
1585 // OEM3: `/~, OEM_MINUS: -/_, OEM_PLUS: =/+, ...
1586 _ => {
1587 if let Some(key) = oemkey_vkcode_to_string(code) {
1588 Some(Keystroke {
1589 modifiers,
1590 key,
1591 ime_key: None,
1592 })
1593 } else {
1594 None
1595 }
1596 }
1597 }
1598}
1599
1600fn oemkey_vkcode_to_string(code: u16) -> Option<String> {
1601 match code {
1602 186 => Some(";".to_string()), // VK_OEM_1
1603 187 => Some("=".to_string()), // VK_OEM_PLUS
1604 188 => Some(",".to_string()), // VK_OEM_COMMA
1605 189 => Some("-".to_string()), // VK_OEM_MINUS
1606 190 => Some(".".to_string()), // VK_OEM_PERIOD
1607 // https://kbdlayout.info/features/virtualkeys/VK_ABNT_C1
1608 191 | 193 => Some("/".to_string()), // VK_OEM_2 VK_ABNT_C1
1609 192 => Some("`".to_string()), // VK_OEM_3
1610 219 => Some("[".to_string()), // VK_OEM_4
1611 220 => Some("\\".to_string()), // VK_OEM_5
1612 221 => Some("]".to_string()), // VK_OEM_6
1613 222 => Some("'".to_string()), // VK_OEM_7
1614 _ => None,
1615 }
1616}
1617
1618// https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-dragqueryfilew
1619const DRAGDROP_GET_FILES_COUNT: u32 = 0xFFFFFFFF;