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