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 anyhow::Context;
17use blade_graphics as gpu;
18use futures::channel::oneshot::{self, Receiver};
19use itertools::Itertools;
20use raw_window_handle::{HasDisplayHandle, HasWindowHandle};
21use smallvec::SmallVec;
22use std::result::Result;
23use windows::{
24 core::*,
25 Win32::{
26 Foundation::*,
27 Graphics::Gdi::*,
28 System::{Com::*, Ole::*, SystemServices::*},
29 UI::{
30 Controls::*,
31 HiDpi::*,
32 Input::{Ime::*, KeyboardAndMouse::*},
33 Shell::*,
34 WindowsAndMessaging::*,
35 },
36 },
37};
38
39use crate::platform::blade::BladeRenderer;
40use crate::*;
41
42pub(crate) struct WindowsWindowInner {
43 hwnd: HWND,
44 origin: Cell<Point<GlobalPixels>>,
45 physical_size: Cell<Size<GlobalPixels>>,
46 scale_factor: Cell<f32>,
47 input_handler: Cell<Option<PlatformInputHandler>>,
48 renderer: RefCell<BladeRenderer>,
49 callbacks: RefCell<Callbacks>,
50 platform_inner: Rc<WindowsPlatformInner>,
51 pub(crate) handle: AnyWindowHandle,
52 hide_title_bar: bool,
53 display: RefCell<Rc<WindowsDisplay>>,
54 last_ime_input: RefCell<Option<String>>,
55}
56
57impl WindowsWindowInner {
58 fn new(
59 hwnd: HWND,
60 cs: &CREATESTRUCTW,
61 platform_inner: Rc<WindowsPlatformInner>,
62 handle: AnyWindowHandle,
63 hide_title_bar: bool,
64 display: Rc<WindowsDisplay>,
65 ) -> Self {
66 let monitor_dpi = unsafe { GetDpiForWindow(hwnd) } as f32;
67 let origin = Cell::new(Point {
68 x: GlobalPixels(cs.x as f32),
69 y: GlobalPixels(cs.y as f32),
70 });
71 let physical_size = Cell::new(Size {
72 width: GlobalPixels(cs.cx as f32),
73 height: GlobalPixels(cs.cy as f32),
74 });
75 let scale_factor = Cell::new(monitor_dpi / USER_DEFAULT_SCREEN_DPI as f32);
76 let input_handler = Cell::new(None);
77 struct RawWindow {
78 hwnd: *mut c_void,
79 }
80 unsafe impl blade_rwh::HasRawWindowHandle for RawWindow {
81 fn raw_window_handle(&self) -> blade_rwh::RawWindowHandle {
82 let mut handle = blade_rwh::Win32WindowHandle::empty();
83 handle.hwnd = self.hwnd;
84 handle.into()
85 }
86 }
87 unsafe impl blade_rwh::HasRawDisplayHandle for RawWindow {
88 fn raw_display_handle(&self) -> blade_rwh::RawDisplayHandle {
89 blade_rwh::WindowsDisplayHandle::empty().into()
90 }
91 }
92 let raw = RawWindow { hwnd: hwnd.0 as _ };
93 let gpu = Arc::new(
94 unsafe {
95 gpu::Context::init_windowed(
96 &raw,
97 gpu::ContextDesc {
98 validation: false,
99 capture: false,
100 overlay: false,
101 },
102 )
103 }
104 .unwrap(),
105 );
106 let extent = gpu::Extent {
107 width: 1,
108 height: 1,
109 depth: 1,
110 };
111 let renderer = RefCell::new(BladeRenderer::new(gpu, extent));
112 let callbacks = RefCell::new(Callbacks::default());
113 let display = RefCell::new(display);
114 let last_ime_input = RefCell::new(None);
115 Self {
116 hwnd,
117 origin,
118 physical_size,
119 scale_factor,
120 input_handler,
121 renderer,
122 callbacks,
123 platform_inner,
124 handle,
125 hide_title_bar,
126 display,
127 last_ime_input,
128 }
129 }
130
131 fn is_maximized(&self) -> bool {
132 unsafe { IsZoomed(self.hwnd) }.as_bool()
133 }
134
135 fn is_minimized(&self) -> bool {
136 unsafe { IsIconic(self.hwnd) }.as_bool()
137 }
138
139 pub(crate) fn title_bar_padding(&self) -> Pixels {
140 // using USER_DEFAULT_SCREEN_DPI because GPUI handles the scale with the scale factor
141 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, USER_DEFAULT_SCREEN_DPI) };
142 px(padding as f32)
143 }
144
145 pub(crate) fn title_bar_top_offset(&self) -> Pixels {
146 if self.is_maximized() {
147 self.title_bar_padding() * 2
148 } else {
149 px(0.)
150 }
151 }
152
153 pub(crate) fn title_bar_height(&self) -> Pixels {
154 // todo(windows) this is hard set to match the ui title bar
155 // in the future the ui title bar component will report the size
156 px(32.) + self.title_bar_top_offset()
157 }
158
159 pub(crate) fn caption_button_width(&self) -> Pixels {
160 // todo(windows) this is hard set to match the ui title bar
161 // in the future the ui title bar component will report the size
162 px(36.)
163 }
164
165 fn get_titlebar_rect(&self) -> anyhow::Result<RECT> {
166 let height = self.title_bar_height();
167 let mut rect = RECT::default();
168 unsafe { GetClientRect(self.hwnd, &mut rect) }?;
169 rect.bottom = rect.top + ((height.0 * self.scale_factor.get()).round() as i32);
170 Ok(rect)
171 }
172
173 fn is_virtual_key_pressed(&self, vkey: VIRTUAL_KEY) -> bool {
174 unsafe { GetKeyState(vkey.0 as i32) < 0 }
175 }
176
177 fn current_modifiers(&self) -> Modifiers {
178 Modifiers {
179 control: self.is_virtual_key_pressed(VK_CONTROL),
180 alt: self.is_virtual_key_pressed(VK_MENU),
181 shift: self.is_virtual_key_pressed(VK_SHIFT),
182 command: self.is_virtual_key_pressed(VK_LWIN) || self.is_virtual_key_pressed(VK_RWIN),
183 function: false,
184 }
185 }
186
187 /// mark window client rect to be re-drawn
188 /// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-invalidaterect
189 pub(crate) fn invalidate_client_area(&self) {
190 unsafe { InvalidateRect(self.hwnd, None, FALSE) };
191 }
192
193 fn handle_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
194 let handled = match msg {
195 WM_ACTIVATE => self.handle_activate_msg(wparam),
196 WM_CREATE => self.handle_create_msg(lparam),
197 WM_MOVE => self.handle_move_msg(lparam),
198 WM_SIZE => self.handle_size_msg(lparam),
199 WM_NCCALCSIZE => self.handle_calc_client_size(wparam, lparam),
200 WM_DPICHANGED => self.handle_dpi_changed_msg(wparam, lparam),
201 WM_NCHITTEST => self.handle_hit_test_msg(msg, wparam, lparam),
202 WM_PAINT => self.handle_paint_msg(),
203 WM_CLOSE => self.handle_close_msg(),
204 WM_DESTROY => self.handle_destroy_msg(),
205 WM_MOUSEMOVE => self.handle_mouse_move_msg(lparam, wparam),
206 WM_NCMOUSEMOVE => self.handle_nc_mouse_move_msg(lparam),
207 WM_NCLBUTTONDOWN => self.handle_nc_mouse_down_msg(MouseButton::Left, wparam, lparam),
208 WM_NCRBUTTONDOWN => self.handle_nc_mouse_down_msg(MouseButton::Right, wparam, lparam),
209 WM_NCMBUTTONDOWN => self.handle_nc_mouse_down_msg(MouseButton::Middle, wparam, lparam),
210 WM_NCLBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Left, wparam, lparam),
211 WM_NCRBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Right, wparam, lparam),
212 WM_NCMBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Middle, wparam, lparam),
213 WM_LBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Left, lparam),
214 WM_RBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Right, lparam),
215 WM_MBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Middle, lparam),
216 WM_XBUTTONDOWN => self.handle_xbutton_msg(wparam, lparam, Self::handle_mouse_down_msg),
217 WM_LBUTTONUP => self.handle_mouse_up_msg(MouseButton::Left, lparam),
218 WM_RBUTTONUP => self.handle_mouse_up_msg(MouseButton::Right, lparam),
219 WM_MBUTTONUP => self.handle_mouse_up_msg(MouseButton::Middle, lparam),
220 WM_XBUTTONUP => self.handle_xbutton_msg(wparam, lparam, Self::handle_mouse_up_msg),
221 WM_MOUSEWHEEL => self.handle_mouse_wheel_msg(wparam, lparam),
222 WM_MOUSEHWHEEL => self.handle_mouse_horizontal_wheel_msg(wparam, lparam),
223 WM_SYSKEYDOWN => self.handle_syskeydown_msg(wparam, lparam),
224 WM_SYSKEYUP => self.handle_syskeyup_msg(wparam),
225 WM_KEYDOWN => self.handle_keydown_msg(msg, wparam, lparam),
226 WM_KEYUP => self.handle_keyup_msg(msg, wparam),
227 WM_CHAR => self.handle_char_msg(msg, wparam, lparam),
228 WM_IME_STARTCOMPOSITION => self.handle_ime_position(),
229 WM_IME_COMPOSITION => self.handle_ime_composition(lparam),
230 WM_IME_CHAR => self.handle_ime_char(wparam),
231 WM_SETCURSOR => self.handle_set_cursor(lparam),
232 _ => None,
233 };
234 if let Some(n) = handled {
235 LRESULT(n)
236 } else {
237 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
238 }
239 }
240
241 fn handle_move_msg(&self, lparam: LPARAM) -> Option<isize> {
242 let x = lparam.signed_loword() as f32;
243 let y = lparam.signed_hiword() as f32;
244 self.origin.set(Point {
245 x: GlobalPixels(x),
246 y: GlobalPixels(y),
247 });
248 let size = self.physical_size.get();
249 let center_x = x + size.width.0 / 2.0;
250 let center_y = y + size.height.0 / 2.0;
251 let monitor_bounds = self.display.borrow().bounds();
252 if center_x < monitor_bounds.left().0
253 || center_x > monitor_bounds.right().0
254 || center_y < monitor_bounds.top().0
255 || center_y > monitor_bounds.bottom().0
256 {
257 // center of the window may have moved to another monitor
258 let monitor = unsafe { MonitorFromWindow(self.hwnd, MONITOR_DEFAULTTONULL) };
259 if !monitor.is_invalid() && self.display.borrow().handle != monitor {
260 // we will get the same monitor if we only have one
261 (*self.display.borrow_mut()) = Rc::new(WindowsDisplay::new_with_handle(monitor));
262 }
263 }
264 let mut callbacks = self.callbacks.borrow_mut();
265 if let Some(callback) = callbacks.moved.as_mut() {
266 callback()
267 }
268 Some(0)
269 }
270
271 fn handle_size_msg(&self, lparam: LPARAM) -> Option<isize> {
272 let width = lparam.loword().max(1) as f32;
273 let height = lparam.hiword().max(1) as f32;
274 let scale_factor = self.scale_factor.get();
275 let new_physical_size = Size {
276 width: GlobalPixels(width),
277 height: GlobalPixels(height),
278 };
279 self.physical_size.set(new_physical_size);
280 self.renderer.borrow_mut().update_drawable_size(Size {
281 width: width as f64,
282 height: height as f64,
283 });
284 let mut callbacks = self.callbacks.borrow_mut();
285 if let Some(callback) = callbacks.resize.as_mut() {
286 let logical_size = logical_size(new_physical_size, scale_factor);
287 callback(logical_size, scale_factor);
288 }
289 self.invalidate_client_area();
290 Some(0)
291 }
292
293 fn handle_paint_msg(&self) -> Option<isize> {
294 let mut paint_struct = PAINTSTRUCT::default();
295 let _hdc = unsafe { BeginPaint(self.hwnd, &mut paint_struct) };
296 let mut callbacks = self.callbacks.borrow_mut();
297 if let Some(request_frame) = callbacks.request_frame.as_mut() {
298 request_frame();
299 }
300 unsafe { EndPaint(self.hwnd, &paint_struct) };
301 Some(0)
302 }
303
304 fn handle_close_msg(&self) -> Option<isize> {
305 let mut callbacks = self.callbacks.borrow_mut();
306 if let Some(callback) = callbacks.should_close.as_mut() {
307 if callback() {
308 return Some(0);
309 }
310 }
311 None
312 }
313
314 fn handle_destroy_msg(&self) -> Option<isize> {
315 let mut callbacks = self.callbacks.borrow_mut();
316 if let Some(callback) = callbacks.close.take() {
317 callback()
318 }
319 let index = self
320 .platform_inner
321 .raw_window_handles
322 .read()
323 .iter()
324 .position(|handle| *handle == self.hwnd)
325 .unwrap();
326 self.platform_inner.raw_window_handles.write().remove(index);
327 if self.platform_inner.raw_window_handles.read().is_empty() {
328 self.platform_inner
329 .foreground_executor
330 .spawn(async {
331 unsafe { PostQuitMessage(0) };
332 })
333 .detach();
334 }
335 Some(1)
336 }
337
338 fn handle_mouse_move_msg(&self, lparam: LPARAM, wparam: WPARAM) -> Option<isize> {
339 let mut callbacks = self.callbacks.borrow_mut();
340 if let Some(callback) = callbacks.input.as_mut() {
341 let pressed_button = match MODIFIERKEYS_FLAGS(wparam.loword() as u32) {
342 flags if flags.contains(MK_LBUTTON) => Some(MouseButton::Left),
343 flags if flags.contains(MK_RBUTTON) => Some(MouseButton::Right),
344 flags if flags.contains(MK_MBUTTON) => Some(MouseButton::Middle),
345 flags if flags.contains(MK_XBUTTON1) => {
346 Some(MouseButton::Navigate(NavigationDirection::Back))
347 }
348 flags if flags.contains(MK_XBUTTON2) => {
349 Some(MouseButton::Navigate(NavigationDirection::Forward))
350 }
351 _ => None,
352 };
353 let x = lparam.signed_loword() as f32;
354 let y = lparam.signed_hiword() as f32;
355 let scale_factor = self.scale_factor.get();
356 let event = MouseMoveEvent {
357 position: logical_point(x, y, scale_factor),
358 pressed_button,
359 modifiers: self.current_modifiers(),
360 };
361 if callback(PlatformInput::MouseMove(event)).default_prevented {
362 return Some(0);
363 }
364 }
365 Some(1)
366 }
367
368 fn parse_syskeydown_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
369 let modifiers = self.current_modifiers();
370 if !modifiers.alt {
371 // on Windows, F10 can trigger this event, not just the alt key
372 // and we just don't care about F10
373 return None;
374 }
375
376 let vk_code = wparam.loword();
377 let basic_key = basic_vkcode_to_string(vk_code, modifiers);
378 if basic_key.is_some() {
379 return basic_key;
380 }
381
382 let key = match VIRTUAL_KEY(vk_code) {
383 VK_BACK => Some("backspace"),
384 VK_RETURN => Some("enter"),
385 VK_TAB => Some("tab"),
386 VK_UP => Some("up"),
387 VK_DOWN => Some("down"),
388 VK_RIGHT => Some("right"),
389 VK_LEFT => Some("left"),
390 VK_HOME => Some("home"),
391 VK_END => Some("end"),
392 VK_PRIOR => Some("pageup"),
393 VK_NEXT => Some("pagedown"),
394 VK_ESCAPE => Some("escape"),
395 VK_INSERT => Some("insert"),
396 _ => None,
397 };
398
399 if let Some(key) = key {
400 Some(Keystroke {
401 modifiers,
402 key: key.to_string(),
403 ime_key: None,
404 })
405 } else {
406 None
407 }
408 }
409
410 fn parse_keydown_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
411 let vk_code = wparam.loword();
412
413 let modifiers = self.current_modifiers();
414 if modifiers.control || modifiers.alt {
415 let basic_key = basic_vkcode_to_string(vk_code, modifiers);
416 if basic_key.is_some() {
417 return basic_key;
418 }
419 }
420
421 if vk_code >= VK_F1.0 && vk_code <= VK_F24.0 {
422 let offset = vk_code - VK_F1.0;
423 return Some(Keystroke {
424 modifiers,
425 key: format!("f{}", offset + 1),
426 ime_key: None,
427 });
428 }
429
430 let key = match VIRTUAL_KEY(vk_code) {
431 VK_BACK => Some("backspace"),
432 VK_RETURN => Some("enter"),
433 VK_TAB => Some("tab"),
434 VK_UP => Some("up"),
435 VK_DOWN => Some("down"),
436 VK_RIGHT => Some("right"),
437 VK_LEFT => Some("left"),
438 VK_HOME => Some("home"),
439 VK_END => Some("end"),
440 VK_PRIOR => Some("pageup"),
441 VK_NEXT => Some("pagedown"),
442 VK_ESCAPE => Some("escape"),
443 VK_INSERT => Some("insert"),
444 _ => None,
445 };
446
447 if let Some(key) = key {
448 Some(Keystroke {
449 modifiers,
450 key: key.to_string(),
451 ime_key: None,
452 })
453 } else {
454 None
455 }
456 }
457
458 fn parse_char_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
459 let src = [wparam.0 as u16];
460 let Ok(first_char) = char::decode_utf16(src).collect::<Vec<_>>()[0] else {
461 return None;
462 };
463 if first_char.is_control() {
464 None
465 } else {
466 let mut modifiers = self.current_modifiers();
467 // for characters that use 'shift' to type it is expected that the
468 // shift is not reported if the uppercase/lowercase are the same and instead only the key is reported
469 if first_char.to_lowercase().to_string() == first_char.to_uppercase().to_string() {
470 modifiers.shift = false;
471 }
472 let key = match first_char {
473 ' ' => "space".to_string(),
474 first_char => first_char.to_lowercase().to_string(),
475 };
476 Some(Keystroke {
477 modifiers,
478 key,
479 ime_key: Some(first_char.to_string()),
480 })
481 }
482 }
483
484 fn handle_syskeydown_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
485 // we need to call `DefWindowProcW`, or we will lose the system-wide `Alt+F4`, `Alt+{other keys}`
486 // shortcuts.
487 let Some(keystroke) = self.parse_syskeydown_msg_keystroke(wparam) else {
488 return None;
489 };
490 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
491 return None;
492 };
493 let event = KeyDownEvent {
494 keystroke,
495 is_held: lparam.0 & (0x1 << 30) > 0,
496 };
497 if func(PlatformInput::KeyDown(event)).default_prevented {
498 self.invalidate_client_area();
499 return Some(0);
500 }
501 None
502 }
503
504 fn handle_syskeyup_msg(&self, wparam: WPARAM) -> Option<isize> {
505 // we need to call `DefWindowProcW`, or we will lose the system-wide `Alt+F4`, `Alt+{other keys}`
506 // shortcuts.
507 let Some(keystroke) = self.parse_syskeydown_msg_keystroke(wparam) else {
508 return None;
509 };
510 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
511 return None;
512 };
513 let event = KeyUpEvent { keystroke };
514 if func(PlatformInput::KeyUp(event)).default_prevented {
515 self.invalidate_client_area();
516 return Some(0);
517 }
518 None
519 }
520
521 fn handle_keydown_msg(&self, _msg: u32, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
522 let Some(keystroke) = self.parse_keydown_msg_keystroke(wparam) else {
523 return Some(1);
524 };
525 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
526 return Some(1);
527 };
528 let event = KeyDownEvent {
529 keystroke,
530 is_held: lparam.0 & (0x1 << 30) > 0,
531 };
532 if func(PlatformInput::KeyDown(event)).default_prevented {
533 self.invalidate_client_area();
534 return Some(0);
535 }
536 Some(1)
537 }
538
539 fn handle_keyup_msg(&self, _msg: u32, wparam: WPARAM) -> Option<isize> {
540 let Some(keystroke) = self.parse_keydown_msg_keystroke(wparam) else {
541 return Some(1);
542 };
543 let Some(ref mut func) = self.callbacks.borrow_mut().input else {
544 return Some(1);
545 };
546 let event = KeyUpEvent { keystroke };
547 if func(PlatformInput::KeyUp(event)).default_prevented {
548 self.invalidate_client_area();
549 return Some(0);
550 }
551 Some(1)
552 }
553
554 fn handle_char_msg(&self, _msg: u32, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
555 let Some(keystroke) = self.parse_char_msg_keystroke(wparam) else {
556 return Some(1);
557 };
558 let mut callbacks = self.callbacks.borrow_mut();
559 let Some(ref mut func) = callbacks.input else {
560 return Some(1);
561 };
562 let ime_key = keystroke.ime_key.clone();
563 let event = KeyDownEvent {
564 keystroke,
565 is_held: lparam.0 & (0x1 << 30) > 0,
566 };
567
568 let dispatch_event_result = func(PlatformInput::KeyDown(event));
569 if dispatch_event_result.default_prevented || !dispatch_event_result.propagate {
570 self.invalidate_client_area();
571 return Some(0);
572 }
573 drop(callbacks);
574 let Some(ime_char) = ime_key else {
575 return Some(1);
576 };
577 let Some(mut input_handler) = self.input_handler.take() else {
578 return Some(1);
579 };
580 input_handler.replace_text_in_range(None, &ime_char);
581 self.input_handler.set(Some(input_handler));
582 self.invalidate_client_area();
583 Some(0)
584 }
585
586 fn handle_mouse_down_msg(&self, button: MouseButton, lparam: LPARAM) -> Option<isize> {
587 let mut callbacks = self.callbacks.borrow_mut();
588 if let Some(callback) = callbacks.input.as_mut() {
589 let x = lparam.signed_loword() as f32;
590 let y = lparam.signed_hiword() as f32;
591 let scale_factor = self.scale_factor.get();
592 let event = MouseDownEvent {
593 button,
594 position: logical_point(x, y, scale_factor),
595 modifiers: self.current_modifiers(),
596 click_count: 1,
597 first_mouse: false,
598 };
599 if callback(PlatformInput::MouseDown(event)).default_prevented {
600 return Some(0);
601 }
602 }
603 Some(1)
604 }
605
606 fn handle_mouse_up_msg(&self, button: MouseButton, lparam: LPARAM) -> Option<isize> {
607 let mut callbacks = self.callbacks.borrow_mut();
608 if let Some(callback) = callbacks.input.as_mut() {
609 let x = lparam.signed_loword() as f32;
610 let y = lparam.signed_hiword() as f32;
611 let scale_factor = self.scale_factor.get();
612 let event = MouseUpEvent {
613 button,
614 position: logical_point(x, y, scale_factor),
615 modifiers: self.current_modifiers(),
616 click_count: 1,
617 };
618 if callback(PlatformInput::MouseUp(event)).default_prevented {
619 return Some(0);
620 }
621 }
622 Some(1)
623 }
624
625 fn handle_xbutton_msg(
626 &self,
627 wparam: WPARAM,
628 lparam: LPARAM,
629 handler: impl Fn(&Self, MouseButton, LPARAM) -> Option<isize>,
630 ) -> Option<isize> {
631 let nav_dir = match wparam.hiword() {
632 XBUTTON1 => NavigationDirection::Back,
633 XBUTTON2 => NavigationDirection::Forward,
634 _ => return Some(1),
635 };
636 handler(self, MouseButton::Navigate(nav_dir), lparam)
637 }
638
639 fn handle_mouse_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
640 let mut callbacks = self.callbacks.borrow_mut();
641 if let Some(callback) = callbacks.input.as_mut() {
642 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
643 * self.platform_inner.settings.borrow().wheel_scroll_lines as f32;
644 let x = lparam.signed_loword() as f32;
645 let y = lparam.signed_hiword() as f32;
646 let scale_factor = self.scale_factor.get();
647 let event = crate::ScrollWheelEvent {
648 position: logical_point(x, y, scale_factor),
649 delta: ScrollDelta::Lines(Point {
650 x: 0.0,
651 y: wheel_distance,
652 }),
653 modifiers: self.current_modifiers(),
654 touch_phase: TouchPhase::Moved,
655 };
656 callback(PlatformInput::ScrollWheel(event));
657 return Some(0);
658 }
659 Some(1)
660 }
661
662 fn handle_mouse_horizontal_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
663 let mut callbacks = self.callbacks.borrow_mut();
664 if let Some(callback) = callbacks.input.as_mut() {
665 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
666 * self.platform_inner.settings.borrow().wheel_scroll_chars as f32;
667 let x = lparam.signed_loword() as f32;
668 let y = lparam.signed_hiword() as f32;
669 let scale_factor = self.scale_factor.get();
670 let event = crate::ScrollWheelEvent {
671 position: logical_point(x, y, scale_factor),
672 delta: ScrollDelta::Lines(Point {
673 x: wheel_distance,
674 y: 0.0,
675 }),
676 modifiers: self.current_modifiers(),
677 touch_phase: TouchPhase::Moved,
678 };
679 if callback(PlatformInput::ScrollWheel(event)).default_prevented {
680 return Some(0);
681 }
682 }
683 Some(1)
684 }
685
686 fn handle_ime_position(&self) -> Option<isize> {
687 unsafe {
688 let ctx = ImmGetContext(self.hwnd);
689 let Some(mut input_handler) = self.input_handler.take() else {
690 return Some(1);
691 };
692 // we are composing, this should never fail
693 let caret_range = input_handler.selected_text_range().unwrap();
694 let caret_position = input_handler.bounds_for_range(caret_range).unwrap();
695 self.input_handler.set(Some(input_handler));
696 let scale_factor = self.scale_factor.get();
697 let config = CANDIDATEFORM {
698 dwStyle: CFS_CANDIDATEPOS,
699 // logical to physical
700 ptCurrentPos: POINT {
701 x: (caret_position.origin.x.0 * scale_factor) as i32,
702 y: (caret_position.origin.y.0 * scale_factor) as i32
703 + ((caret_position.size.height.0 * scale_factor) as i32 / 2),
704 },
705 ..Default::default()
706 };
707 ImmSetCandidateWindow(ctx, &config as _);
708 ImmReleaseContext(self.hwnd, ctx);
709 Some(0)
710 }
711 }
712
713 fn parse_ime_compostion_string(&self) -> Option<(String, usize)> {
714 unsafe {
715 let ctx = ImmGetContext(self.hwnd);
716 let string_len = ImmGetCompositionStringW(ctx, GCS_COMPSTR, None, 0);
717 let result = if string_len >= 0 {
718 let mut buffer = vec![0u8; string_len as usize + 2];
719 // let mut buffer = [0u8; MAX_PATH as _];
720 ImmGetCompositionStringW(
721 ctx,
722 GCS_COMPSTR,
723 Some(buffer.as_mut_ptr() as _),
724 string_len as _,
725 );
726 let wstring = std::slice::from_raw_parts::<u16>(
727 buffer.as_mut_ptr().cast::<u16>(),
728 string_len as usize / 2,
729 );
730 let string = String::from_utf16_lossy(wstring);
731 Some((string, string_len as usize / 2))
732 } else {
733 None
734 };
735 ImmReleaseContext(self.hwnd, ctx);
736 result
737 }
738 }
739
740 fn retrieve_composition_cursor_position(&self) -> usize {
741 unsafe {
742 let ctx = ImmGetContext(self.hwnd);
743 let ret = ImmGetCompositionStringW(ctx, GCS_CURSORPOS, None, 0);
744 ImmReleaseContext(self.hwnd, ctx);
745 ret as usize
746 }
747 }
748
749 fn handle_ime_composition(&self, lparam: LPARAM) -> Option<isize> {
750 if lparam.0 as u32 & GCS_COMPSTR.0 > 0 {
751 let Some((string, string_len)) = self.parse_ime_compostion_string() else {
752 return None;
753 };
754 let Some(mut input_handler) = self.input_handler.take() else {
755 return None;
756 };
757 input_handler.replace_and_mark_text_in_range(
758 None,
759 string.as_str(),
760 Some(0..string_len),
761 );
762 self.input_handler.set(Some(input_handler));
763 *self.last_ime_input.borrow_mut() = Some(string);
764 }
765 if lparam.0 as u32 & GCS_CURSORPOS.0 > 0 {
766 let Some(ref comp_string) = *self.last_ime_input.borrow() else {
767 return None;
768 };
769 let caret_pos = self.retrieve_composition_cursor_position();
770 let Some(mut input_handler) = self.input_handler.take() else {
771 return None;
772 };
773 input_handler.replace_and_mark_text_in_range(None, comp_string, Some(0..caret_pos));
774 self.input_handler.set(Some(input_handler));
775 }
776 // currently, we don't care other stuff
777 None
778 }
779
780 fn parse_ime_char(&self, wparam: WPARAM) -> Option<String> {
781 let src = [wparam.0 as u16];
782 let Ok(first_char) = char::decode_utf16(src).collect::<Vec<_>>()[0] else {
783 return None;
784 };
785 Some(first_char.to_string())
786 }
787
788 fn handle_ime_char(&self, wparam: WPARAM) -> Option<isize> {
789 let Some(ime_char) = self.parse_ime_char(wparam) else {
790 return Some(1);
791 };
792 let Some(mut input_handler) = self.input_handler.take() else {
793 return Some(1);
794 };
795 input_handler.replace_text_in_range(None, &ime_char);
796 self.input_handler.set(Some(input_handler));
797 *self.last_ime_input.borrow_mut() = None;
798 self.invalidate_client_area();
799 Some(0)
800 }
801
802 fn handle_drag_drop(&self, input: PlatformInput) {
803 let mut callbacks = self.callbacks.borrow_mut();
804 let Some(ref mut func) = callbacks.input else {
805 return;
806 };
807 func(input);
808 }
809
810 /// SEE: https://learn.microsoft.com/en-us/windows/win32/winmsg/wm-nccalcsize
811 fn handle_calc_client_size(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
812 if !self.hide_title_bar {
813 return None;
814 }
815
816 if wparam.0 == 0 {
817 return None;
818 }
819
820 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
821
822 let frame_x = unsafe { GetSystemMetricsForDpi(SM_CXFRAME, dpi) };
823 let frame_y = unsafe { GetSystemMetricsForDpi(SM_CYFRAME, dpi) };
824 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) };
825
826 // wparam is TRUE so lparam points to an NCCALCSIZE_PARAMS structure
827 let mut params = lparam.0 as *mut NCCALCSIZE_PARAMS;
828 let mut requested_client_rect = unsafe { &mut ((*params).rgrc) };
829
830 requested_client_rect[0].right -= frame_x + padding;
831 requested_client_rect[0].left += frame_x + padding;
832 requested_client_rect[0].bottom -= frame_y + padding;
833
834 Some(0)
835 }
836
837 fn handle_activate_msg(&self, wparam: WPARAM) -> Option<isize> {
838 if self.hide_title_bar {
839 if let Some(titlebar_rect) = self.get_titlebar_rect().log_err() {
840 unsafe { InvalidateRect(self.hwnd, Some(&titlebar_rect), FALSE) };
841 }
842 }
843 let activated = wparam.loword() > 0;
844 let mut callbacks = self.callbacks.borrow_mut();
845 if let Some(mut cb) = callbacks.active_status_change.as_mut() {
846 cb(activated);
847 }
848 None
849 }
850
851 fn handle_create_msg(&self, _lparam: LPARAM) -> Option<isize> {
852 let mut size_rect = RECT::default();
853 unsafe { GetWindowRect(self.hwnd, &mut size_rect).log_err() };
854
855 let width = size_rect.right - size_rect.left;
856 let height = size_rect.bottom - size_rect.top;
857
858 self.physical_size.set(Size {
859 width: GlobalPixels(width as f32),
860 height: GlobalPixels(height as f32),
861 });
862
863 if self.hide_title_bar {
864 // Inform the application of the frame change to force redrawing with the new
865 // client area that is extended into the title bar
866 unsafe {
867 SetWindowPos(
868 self.hwnd,
869 HWND::default(),
870 size_rect.left,
871 size_rect.top,
872 width,
873 height,
874 SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE,
875 )
876 .log_err()
877 };
878 }
879
880 Some(0)
881 }
882
883 fn handle_dpi_changed_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
884 let new_dpi = wparam.loword() as f32;
885 let scale_factor = new_dpi / USER_DEFAULT_SCREEN_DPI as f32;
886 self.scale_factor.set(scale_factor);
887 let rect = unsafe { &*(lparam.0 as *const RECT) };
888 let width = rect.right - rect.left;
889 let height = rect.bottom - rect.top;
890 // this will emit `WM_SIZE` and `WM_MOVE` right here
891 // even before this function returns
892 // the new size is handled in `WM_SIZE`
893 unsafe {
894 SetWindowPos(
895 self.hwnd,
896 None,
897 rect.left,
898 rect.top,
899 width,
900 height,
901 SWP_NOZORDER | SWP_NOACTIVATE,
902 )
903 .context("unable to set window position after dpi has changed")
904 .log_err();
905 }
906 self.invalidate_client_area();
907 Some(0)
908 }
909
910 fn handle_hit_test_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
911 if !self.hide_title_bar {
912 return None;
913 }
914
915 // default handler for resize areas
916 let hit = unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
917 if matches!(
918 hit.0 as u32,
919 HTNOWHERE
920 | HTRIGHT
921 | HTLEFT
922 | HTTOPLEFT
923 | HTTOP
924 | HTTOPRIGHT
925 | HTBOTTOMRIGHT
926 | HTBOTTOM
927 | HTBOTTOMLEFT
928 ) {
929 return Some(hit.0);
930 }
931
932 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
933 let frame_y = unsafe { GetSystemMetricsForDpi(SM_CYFRAME, dpi) };
934 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) };
935
936 let mut cursor_point = POINT {
937 x: lparam.signed_loword().into(),
938 y: lparam.signed_hiword().into(),
939 };
940 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
941 if cursor_point.y > 0 && cursor_point.y < frame_y + padding {
942 return Some(HTTOP as _);
943 }
944
945 let titlebar_rect = self.get_titlebar_rect();
946 if let Ok(titlebar_rect) = titlebar_rect {
947 if cursor_point.y < titlebar_rect.bottom {
948 let caption_btn_width =
949 (self.caption_button_width().0 * self.scale_factor.get()) as i32;
950 if cursor_point.x >= titlebar_rect.right - caption_btn_width {
951 return Some(HTCLOSE as _);
952 } else if cursor_point.x >= titlebar_rect.right - caption_btn_width * 2 {
953 return Some(HTMAXBUTTON as _);
954 } else if cursor_point.x >= titlebar_rect.right - caption_btn_width * 3 {
955 return Some(HTMINBUTTON as _);
956 }
957
958 return Some(HTCAPTION as _);
959 }
960 }
961
962 Some(HTCLIENT as _)
963 }
964
965 fn handle_nc_mouse_move_msg(&self, lparam: LPARAM) -> Option<isize> {
966 if !self.hide_title_bar {
967 return None;
968 }
969
970 let mut callbacks = self.callbacks.borrow_mut();
971 if let Some(callback) = callbacks.input.as_mut() {
972 let mut cursor_point = POINT {
973 x: lparam.signed_loword().into(),
974 y: lparam.signed_hiword().into(),
975 };
976 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
977 let scale_factor = self.scale_factor.get();
978 let event = MouseMoveEvent {
979 position: logical_point(cursor_point.x as f32, cursor_point.y as f32, scale_factor),
980 pressed_button: None,
981 modifiers: self.current_modifiers(),
982 };
983 if callback(PlatformInput::MouseMove(event)).default_prevented {
984 return Some(0);
985 }
986 }
987 None
988 }
989
990 fn handle_nc_mouse_down_msg(
991 &self,
992 button: MouseButton,
993 wparam: WPARAM,
994 lparam: LPARAM,
995 ) -> Option<isize> {
996 if !self.hide_title_bar {
997 return None;
998 }
999
1000 let mut callbacks = self.callbacks.borrow_mut();
1001 if let Some(callback) = callbacks.input.as_mut() {
1002 let mut cursor_point = POINT {
1003 x: lparam.signed_loword().into(),
1004 y: lparam.signed_hiword().into(),
1005 };
1006 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
1007 let scale_factor = self.scale_factor.get();
1008 let event = MouseDownEvent {
1009 button,
1010 position: logical_point(cursor_point.x as f32, cursor_point.y as f32, scale_factor),
1011 modifiers: self.current_modifiers(),
1012 click_count: 1,
1013 first_mouse: false,
1014 };
1015 if callback(PlatformInput::MouseDown(event)).default_prevented {
1016 return Some(0);
1017 }
1018 }
1019
1020 // Since these are handled in handle_nc_mouse_up_msg we must prevent the default window proc
1021 matches!(wparam.0 as u32, HTMINBUTTON | HTMAXBUTTON | HTCLOSE).then_some(0)
1022 }
1023
1024 fn handle_nc_mouse_up_msg(
1025 &self,
1026 button: MouseButton,
1027 wparam: WPARAM,
1028 lparam: LPARAM,
1029 ) -> Option<isize> {
1030 if !self.hide_title_bar {
1031 return None;
1032 }
1033
1034 let mut callbacks = self.callbacks.borrow_mut();
1035 if let Some(callback) = callbacks.input.as_mut() {
1036 let mut cursor_point = POINT {
1037 x: lparam.signed_loword().into(),
1038 y: lparam.signed_hiword().into(),
1039 };
1040 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
1041 let scale_factor = self.scale_factor.get();
1042 let event = MouseUpEvent {
1043 button,
1044 position: logical_point(cursor_point.x as f32, cursor_point.y as f32, scale_factor),
1045 modifiers: self.current_modifiers(),
1046 click_count: 1,
1047 };
1048 if callback(PlatformInput::MouseUp(event)).default_prevented {
1049 return Some(0);
1050 }
1051 }
1052 drop(callbacks);
1053
1054 if button == MouseButton::Left {
1055 match wparam.0 as u32 {
1056 HTMINBUTTON => unsafe {
1057 ShowWindowAsync(self.hwnd, SW_MINIMIZE);
1058 },
1059 HTMAXBUTTON => unsafe {
1060 if self.is_maximized() {
1061 ShowWindowAsync(self.hwnd, SW_NORMAL);
1062 } else {
1063 ShowWindowAsync(self.hwnd, SW_MAXIMIZE);
1064 }
1065 },
1066 HTCLOSE => unsafe {
1067 PostMessageW(self.hwnd, WM_CLOSE, WPARAM::default(), LPARAM::default())
1068 .log_err();
1069 },
1070 _ => return None,
1071 };
1072 return Some(0);
1073 }
1074
1075 None
1076 }
1077
1078 fn handle_set_cursor(&self, lparam: LPARAM) -> Option<isize> {
1079 if matches!(
1080 lparam.loword() as u32,
1081 HTLEFT
1082 | HTRIGHT
1083 | HTTOP
1084 | HTTOPLEFT
1085 | HTTOPRIGHT
1086 | HTBOTTOM
1087 | HTBOTTOMLEFT
1088 | HTBOTTOMRIGHT
1089 ) {
1090 return None;
1091 }
1092 unsafe { SetCursor(self.platform_inner.current_cursor.get()) };
1093 Some(1)
1094 }
1095}
1096
1097#[derive(Default)]
1098struct Callbacks {
1099 request_frame: Option<Box<dyn FnMut()>>,
1100 input: Option<Box<dyn FnMut(crate::PlatformInput) -> DispatchEventResult>>,
1101 active_status_change: Option<Box<dyn FnMut(bool)>>,
1102 resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
1103 fullscreen: Option<Box<dyn FnMut(bool)>>,
1104 moved: Option<Box<dyn FnMut()>>,
1105 should_close: Option<Box<dyn FnMut() -> bool>>,
1106 close: Option<Box<dyn FnOnce()>>,
1107 appearance_changed: Option<Box<dyn FnMut()>>,
1108}
1109
1110pub(crate) struct WindowsWindow {
1111 inner: Rc<WindowsWindowInner>,
1112 drag_drop_handler: IDropTarget,
1113}
1114
1115struct WindowCreateContext {
1116 inner: Option<Rc<WindowsWindowInner>>,
1117 platform_inner: Rc<WindowsPlatformInner>,
1118 handle: AnyWindowHandle,
1119 hide_title_bar: bool,
1120 display: Rc<WindowsDisplay>,
1121}
1122
1123impl WindowsWindow {
1124 pub(crate) fn new(
1125 platform_inner: Rc<WindowsPlatformInner>,
1126 handle: AnyWindowHandle,
1127 options: WindowParams,
1128 ) -> Self {
1129 let classname = register_wnd_class(platform_inner.icon);
1130 let hide_title_bar = options
1131 .titlebar
1132 .as_ref()
1133 .map(|titlebar| titlebar.appears_transparent)
1134 .unwrap_or(false);
1135 let windowname = HSTRING::from(
1136 options
1137 .titlebar
1138 .as_ref()
1139 .and_then(|titlebar| titlebar.title.as_ref())
1140 .map(|title| title.as_ref())
1141 .unwrap_or(""),
1142 );
1143 let dwstyle = WS_THICKFRAME | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX;
1144 let x = options.bounds.origin.x.0 as i32;
1145 let y = options.bounds.origin.y.0 as i32;
1146 let nwidth = options.bounds.size.width.0 as i32;
1147 let nheight = options.bounds.size.height.0 as i32;
1148 let hwndparent = HWND::default();
1149 let hmenu = HMENU::default();
1150 let hinstance = HINSTANCE::default();
1151 let mut context = WindowCreateContext {
1152 inner: None,
1153 platform_inner: platform_inner.clone(),
1154 handle,
1155 hide_title_bar,
1156 // todo(windows) move window to target monitor
1157 // options.display_id
1158 display: Rc::new(WindowsDisplay::primary_monitor().unwrap()),
1159 };
1160 let lpparam = Some(&context as *const _ as *const _);
1161 unsafe {
1162 CreateWindowExW(
1163 WS_EX_APPWINDOW,
1164 classname,
1165 &windowname,
1166 dwstyle,
1167 x,
1168 y,
1169 nwidth,
1170 nheight,
1171 hwndparent,
1172 hmenu,
1173 hinstance,
1174 lpparam,
1175 )
1176 };
1177 let drag_drop_handler = {
1178 let inner = context.inner.as_ref().unwrap();
1179 let handler = WindowsDragDropHandler(Rc::clone(inner));
1180 let drag_drop_handler: IDropTarget = handler.into();
1181 unsafe {
1182 RegisterDragDrop(inner.hwnd, &drag_drop_handler)
1183 .expect("unable to register drag-drop event")
1184 };
1185 drag_drop_handler
1186 };
1187 let wnd = Self {
1188 inner: context.inner.unwrap(),
1189 drag_drop_handler,
1190 };
1191 platform_inner
1192 .raw_window_handles
1193 .write()
1194 .push(wnd.inner.hwnd);
1195
1196 unsafe { ShowWindow(wnd.inner.hwnd, SW_SHOW) };
1197 wnd
1198 }
1199}
1200
1201impl HasWindowHandle for WindowsWindow {
1202 fn window_handle(
1203 &self,
1204 ) -> Result<raw_window_handle::WindowHandle<'_>, raw_window_handle::HandleError> {
1205 let raw = raw_window_handle::Win32WindowHandle::new(unsafe {
1206 NonZeroIsize::new_unchecked(self.inner.hwnd.0)
1207 })
1208 .into();
1209 Ok(unsafe { raw_window_handle::WindowHandle::borrow_raw(raw) })
1210 }
1211}
1212
1213// todo(windows)
1214impl HasDisplayHandle for WindowsWindow {
1215 fn display_handle(
1216 &self,
1217 ) -> Result<raw_window_handle::DisplayHandle<'_>, raw_window_handle::HandleError> {
1218 unimplemented!()
1219 }
1220}
1221
1222impl Drop for WindowsWindow {
1223 fn drop(&mut self) {
1224 unsafe {
1225 let _ = RevokeDragDrop(self.inner.hwnd);
1226 }
1227 }
1228}
1229
1230impl PlatformWindow for WindowsWindow {
1231 fn bounds(&self) -> Bounds<GlobalPixels> {
1232 Bounds {
1233 origin: self.inner.origin.get(),
1234 size: self.inner.physical_size.get(),
1235 }
1236 }
1237
1238 fn is_maximized(&self) -> bool {
1239 self.inner.is_maximized()
1240 }
1241
1242 fn is_minimized(&self) -> bool {
1243 self.inner.is_minimized()
1244 }
1245
1246 /// get the logical size of the app's drawable area.
1247 ///
1248 /// Currently, GPUI uses logical size of the app to handle mouse interactions (such as
1249 /// whether the mouse collides with other elements of GPUI).
1250 fn content_size(&self) -> Size<Pixels> {
1251 logical_size(
1252 self.inner.physical_size.get(),
1253 self.inner.scale_factor.get(),
1254 )
1255 }
1256
1257 fn scale_factor(&self) -> f32 {
1258 self.inner.scale_factor.get()
1259 }
1260
1261 // todo(windows)
1262 fn appearance(&self) -> WindowAppearance {
1263 WindowAppearance::Dark
1264 }
1265
1266 fn display(&self) -> Rc<dyn PlatformDisplay> {
1267 self.inner.display.borrow().clone()
1268 }
1269
1270 fn mouse_position(&self) -> Point<Pixels> {
1271 let point = unsafe {
1272 let mut point: POINT = std::mem::zeroed();
1273 GetCursorPos(&mut point)
1274 .context("unable to get cursor position")
1275 .log_err();
1276 ScreenToClient(self.inner.hwnd, &mut point);
1277 point
1278 };
1279 logical_point(
1280 point.x as f32,
1281 point.y as f32,
1282 self.inner.scale_factor.get(),
1283 )
1284 }
1285
1286 // todo(windows)
1287 fn modifiers(&self) -> Modifiers {
1288 Modifiers::none()
1289 }
1290
1291 fn as_any_mut(&mut self) -> &mut dyn Any {
1292 self
1293 }
1294
1295 // todo(windows)
1296 fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
1297 self.inner.input_handler.set(Some(input_handler));
1298 }
1299
1300 // todo(windows)
1301 fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
1302 self.inner.input_handler.take()
1303 }
1304
1305 fn prompt(
1306 &self,
1307 level: PromptLevel,
1308 msg: &str,
1309 detail: Option<&str>,
1310 answers: &[&str],
1311 ) -> Option<Receiver<usize>> {
1312 let (done_tx, done_rx) = oneshot::channel();
1313 let msg = msg.to_string();
1314 let detail_string = match detail {
1315 Some(info) => Some(info.to_string()),
1316 None => None,
1317 };
1318 let answers = answers.iter().map(|s| s.to_string()).collect::<Vec<_>>();
1319 let handle = self.inner.hwnd;
1320 self.inner
1321 .platform_inner
1322 .foreground_executor
1323 .spawn(async move {
1324 unsafe {
1325 let mut config;
1326 config = std::mem::zeroed::<TASKDIALOGCONFIG>();
1327 config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
1328 config.hwndParent = handle;
1329 let title;
1330 let main_icon;
1331 match level {
1332 crate::PromptLevel::Info => {
1333 title = windows::core::w!("Info");
1334 main_icon = TD_INFORMATION_ICON;
1335 }
1336 crate::PromptLevel::Warning => {
1337 title = windows::core::w!("Warning");
1338 main_icon = TD_WARNING_ICON;
1339 }
1340 crate::PromptLevel::Critical => {
1341 title = windows::core::w!("Critical");
1342 main_icon = TD_ERROR_ICON;
1343 }
1344 };
1345 config.pszWindowTitle = title;
1346 config.Anonymous1.pszMainIcon = main_icon;
1347 let instruction = msg.encode_utf16().chain(once(0)).collect_vec();
1348 config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
1349 let hints_encoded;
1350 if let Some(ref hints) = detail_string {
1351 hints_encoded = hints.encode_utf16().chain(once(0)).collect_vec();
1352 config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
1353 };
1354 let mut buttons = Vec::new();
1355 let mut btn_encoded = Vec::new();
1356 for (index, btn_string) in answers.iter().enumerate() {
1357 let encoded = btn_string.encode_utf16().chain(once(0)).collect_vec();
1358 buttons.push(TASKDIALOG_BUTTON {
1359 nButtonID: index as _,
1360 pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
1361 });
1362 btn_encoded.push(encoded);
1363 }
1364 config.cButtons = buttons.len() as _;
1365 config.pButtons = buttons.as_ptr();
1366
1367 config.pfCallback = None;
1368 let mut res = std::mem::zeroed();
1369 let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
1370 .inspect_err(|e| log::error!("unable to create task dialog: {}", e));
1371
1372 let _ = done_tx.send(res as usize);
1373 }
1374 })
1375 .detach();
1376
1377 Some(done_rx)
1378 }
1379
1380 fn activate(&self) {
1381 unsafe { SetActiveWindow(self.inner.hwnd) };
1382 unsafe { SetFocus(self.inner.hwnd) };
1383 unsafe { SetForegroundWindow(self.inner.hwnd) };
1384 }
1385
1386 // todo(windows)
1387 fn set_title(&mut self, title: &str) {
1388 unsafe { SetWindowTextW(self.inner.hwnd, &HSTRING::from(title)) }
1389 .inspect_err(|e| log::error!("Set title failed: {e}"))
1390 .ok();
1391 }
1392
1393 // todo(windows)
1394 fn set_edited(&mut self, _edited: bool) {}
1395
1396 // todo(windows)
1397 fn show_character_palette(&self) {}
1398
1399 fn minimize(&self) {
1400 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MINIMIZE) };
1401 }
1402
1403 fn zoom(&self) {
1404 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MAXIMIZE) };
1405 }
1406
1407 // todo(windows)
1408 fn toggle_fullscreen(&self) {}
1409
1410 // todo(windows)
1411 fn is_fullscreen(&self) -> bool {
1412 false
1413 }
1414
1415 // todo(windows)
1416 fn on_request_frame(&self, callback: Box<dyn FnMut()>) {
1417 self.inner.callbacks.borrow_mut().request_frame = Some(callback);
1418 }
1419
1420 // todo(windows)
1421 fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> DispatchEventResult>) {
1422 self.inner.callbacks.borrow_mut().input = Some(callback);
1423 }
1424
1425 // todo(windows)
1426 fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
1427 self.inner.callbacks.borrow_mut().active_status_change = Some(callback);
1428 }
1429
1430 // todo(windows)
1431 fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
1432 self.inner.callbacks.borrow_mut().resize = Some(callback);
1433 }
1434
1435 // todo(windows)
1436 fn on_fullscreen(&self, callback: Box<dyn FnMut(bool)>) {
1437 self.inner.callbacks.borrow_mut().fullscreen = Some(callback);
1438 }
1439
1440 // todo(windows)
1441 fn on_moved(&self, callback: Box<dyn FnMut()>) {
1442 self.inner.callbacks.borrow_mut().moved = Some(callback);
1443 }
1444
1445 // todo(windows)
1446 fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
1447 self.inner.callbacks.borrow_mut().should_close = Some(callback);
1448 }
1449
1450 // todo(windows)
1451 fn on_close(&self, callback: Box<dyn FnOnce()>) {
1452 self.inner.callbacks.borrow_mut().close = Some(callback);
1453 }
1454
1455 // todo(windows)
1456 fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
1457 self.inner.callbacks.borrow_mut().appearance_changed = Some(callback);
1458 }
1459
1460 // todo(windows)
1461 fn is_topmost_for_position(&self, _position: Point<Pixels>) -> bool {
1462 true
1463 }
1464
1465 // todo(windows)
1466 fn draw(&self, scene: &Scene) {
1467 self.inner.renderer.borrow_mut().draw(scene)
1468 }
1469
1470 // todo(windows)
1471 fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
1472 self.inner.renderer.borrow().sprite_atlas().clone()
1473 }
1474
1475 fn get_raw_handle(&self) -> HWND {
1476 self.inner.hwnd
1477 }
1478}
1479
1480#[implement(IDropTarget)]
1481struct WindowsDragDropHandler(pub Rc<WindowsWindowInner>);
1482
1483#[allow(non_snake_case)]
1484impl IDropTarget_Impl for WindowsDragDropHandler {
1485 fn DragEnter(
1486 &self,
1487 pdataobj: Option<&IDataObject>,
1488 _grfkeystate: MODIFIERKEYS_FLAGS,
1489 pt: &POINTL,
1490 pdweffect: *mut DROPEFFECT,
1491 ) -> windows::core::Result<()> {
1492 unsafe {
1493 let Some(idata_obj) = pdataobj else {
1494 log::info!("no dragging file or directory detected");
1495 return Ok(());
1496 };
1497 let config = FORMATETC {
1498 cfFormat: CF_HDROP.0,
1499 ptd: std::ptr::null_mut() as _,
1500 dwAspect: DVASPECT_CONTENT.0,
1501 lindex: -1,
1502 tymed: TYMED_HGLOBAL.0 as _,
1503 };
1504 let mut paths = SmallVec::<[PathBuf; 2]>::new();
1505 if idata_obj.QueryGetData(&config as _) == S_OK {
1506 *pdweffect = DROPEFFECT_LINK;
1507 let Ok(mut idata) = idata_obj.GetData(&config as _) else {
1508 return Ok(());
1509 };
1510 if idata.u.hGlobal.is_invalid() {
1511 return Ok(());
1512 }
1513 let hdrop = idata.u.hGlobal.0 as *mut HDROP;
1514 let file_count = DragQueryFileW(*hdrop, DRAGDROP_GET_FILES_COUNT, None);
1515 for file_index in 0..file_count {
1516 let filename_length = DragQueryFileW(*hdrop, file_index, None) as usize;
1517 let mut buffer = vec![0u16; filename_length + 1];
1518 let ret = DragQueryFileW(*hdrop, file_index, Some(buffer.as_mut_slice()));
1519 if ret == 0 {
1520 log::error!("unable to read file name");
1521 continue;
1522 }
1523 if let Ok(file_name) = String::from_utf16(&buffer[0..filename_length]) {
1524 if let Ok(path) = PathBuf::from_str(&file_name) {
1525 paths.push(path);
1526 }
1527 }
1528 }
1529 ReleaseStgMedium(&mut idata);
1530 let input = PlatformInput::FileDrop(crate::FileDropEvent::Entered {
1531 position: Point {
1532 x: Pixels(pt.x as _),
1533 y: Pixels(pt.y as _),
1534 },
1535 paths: crate::ExternalPaths(paths),
1536 });
1537 self.0.handle_drag_drop(input);
1538 } else {
1539 *pdweffect = DROPEFFECT_NONE;
1540 }
1541 }
1542 Ok(())
1543 }
1544
1545 fn DragOver(
1546 &self,
1547 _grfkeystate: MODIFIERKEYS_FLAGS,
1548 pt: &POINTL,
1549 _pdweffect: *mut DROPEFFECT,
1550 ) -> windows::core::Result<()> {
1551 let input = PlatformInput::FileDrop(crate::FileDropEvent::Pending {
1552 position: Point {
1553 x: Pixels(pt.x as _),
1554 y: Pixels(pt.y as _),
1555 },
1556 });
1557 self.0.handle_drag_drop(input);
1558
1559 Ok(())
1560 }
1561
1562 fn DragLeave(&self) -> windows::core::Result<()> {
1563 let input = PlatformInput::FileDrop(crate::FileDropEvent::Exited);
1564 self.0.handle_drag_drop(input);
1565
1566 Ok(())
1567 }
1568
1569 fn Drop(
1570 &self,
1571 _pdataobj: Option<&IDataObject>,
1572 _grfkeystate: MODIFIERKEYS_FLAGS,
1573 pt: &POINTL,
1574 _pdweffect: *mut DROPEFFECT,
1575 ) -> windows::core::Result<()> {
1576 let input = PlatformInput::FileDrop(crate::FileDropEvent::Submit {
1577 position: Point {
1578 x: Pixels(pt.x as _),
1579 y: Pixels(pt.y as _),
1580 },
1581 });
1582 self.0.handle_drag_drop(input);
1583
1584 Ok(())
1585 }
1586}
1587
1588fn register_wnd_class(icon_handle: HICON) -> PCWSTR {
1589 const CLASS_NAME: PCWSTR = w!("Zed::Window");
1590
1591 static ONCE: Once = Once::new();
1592 ONCE.call_once(|| {
1593 let wc = WNDCLASSW {
1594 lpfnWndProc: Some(wnd_proc),
1595 hIcon: icon_handle,
1596 lpszClassName: PCWSTR(CLASS_NAME.as_ptr()),
1597 style: CS_HREDRAW | CS_VREDRAW,
1598 ..Default::default()
1599 };
1600 unsafe { RegisterClassW(&wc) };
1601 });
1602
1603 CLASS_NAME
1604}
1605
1606unsafe extern "system" fn wnd_proc(
1607 hwnd: HWND,
1608 msg: u32,
1609 wparam: WPARAM,
1610 lparam: LPARAM,
1611) -> LRESULT {
1612 if msg == WM_NCCREATE {
1613 let cs = lparam.0 as *const CREATESTRUCTW;
1614 let cs = unsafe { &*cs };
1615 let ctx = cs.lpCreateParams as *mut WindowCreateContext;
1616 let ctx = unsafe { &mut *ctx };
1617 let inner = Rc::new(WindowsWindowInner::new(
1618 hwnd,
1619 cs,
1620 ctx.platform_inner.clone(),
1621 ctx.handle,
1622 ctx.hide_title_bar,
1623 ctx.display.clone(),
1624 ));
1625 let weak = Box::new(Rc::downgrade(&inner));
1626 unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
1627 ctx.inner = Some(inner);
1628 return LRESULT(1);
1629 }
1630 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1631 if ptr.is_null() {
1632 return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
1633 }
1634 let inner = unsafe { &*ptr };
1635 let r = if let Some(inner) = inner.upgrade() {
1636 inner.handle_msg(msg, wparam, lparam)
1637 } else {
1638 unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
1639 };
1640 if msg == WM_NCDESTROY {
1641 unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
1642 unsafe { drop(Box::from_raw(ptr)) };
1643 }
1644 r
1645}
1646
1647pub(crate) fn try_get_window_inner(hwnd: HWND) -> Option<Rc<WindowsWindowInner>> {
1648 if hwnd == HWND(0) {
1649 return None;
1650 }
1651
1652 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1653 if !ptr.is_null() {
1654 let inner = unsafe { &*ptr };
1655 inner.upgrade()
1656 } else {
1657 None
1658 }
1659}
1660
1661fn basic_vkcode_to_string(code: u16, modifiers: Modifiers) -> Option<Keystroke> {
1662 match code {
1663 // VK_0 - VK_9
1664 48..=57 => Some(Keystroke {
1665 modifiers,
1666 key: format!("{}", code - VK_0.0),
1667 ime_key: None,
1668 }),
1669 // VK_A - VK_Z
1670 65..=90 => Some(Keystroke {
1671 modifiers,
1672 key: format!("{}", (b'a' + code as u8 - VK_A.0 as u8) as char),
1673 ime_key: None,
1674 }),
1675 // VK_F1 - VK_F24
1676 112..=135 => Some(Keystroke {
1677 modifiers,
1678 key: format!("f{}", code - VK_F1.0 + 1),
1679 ime_key: None,
1680 }),
1681 // OEM3: `/~, OEM_MINUS: -/_, OEM_PLUS: =/+, ...
1682 _ => {
1683 if let Some(key) = oemkey_vkcode_to_string(code) {
1684 Some(Keystroke {
1685 modifiers,
1686 key,
1687 ime_key: None,
1688 })
1689 } else {
1690 None
1691 }
1692 }
1693 }
1694}
1695
1696fn oemkey_vkcode_to_string(code: u16) -> Option<String> {
1697 match code {
1698 186 => Some(";".to_string()), // VK_OEM_1
1699 187 => Some("=".to_string()), // VK_OEM_PLUS
1700 188 => Some(",".to_string()), // VK_OEM_COMMA
1701 189 => Some("-".to_string()), // VK_OEM_MINUS
1702 190 => Some(".".to_string()), // VK_OEM_PERIOD
1703 // https://kbdlayout.info/features/virtualkeys/VK_ABNT_C1
1704 191 | 193 => Some("/".to_string()), // VK_OEM_2 VK_ABNT_C1
1705 192 => Some("`".to_string()), // VK_OEM_3
1706 219 => Some("[".to_string()), // VK_OEM_4
1707 220 => Some("\\".to_string()), // VK_OEM_5
1708 221 => Some("]".to_string()), // VK_OEM_6
1709 222 => Some("'".to_string()), // VK_OEM_7
1710 _ => None,
1711 }
1712}
1713
1714#[inline]
1715fn logical_size(physical_size: Size<GlobalPixels>, scale_factor: f32) -> Size<Pixels> {
1716 Size {
1717 width: px(physical_size.width.0 / scale_factor),
1718 height: px(physical_size.height.0 / scale_factor),
1719 }
1720}
1721
1722#[inline]
1723fn logical_point(x: f32, y: f32, scale_factor: f32) -> Point<Pixels> {
1724 Point {
1725 x: px(x / scale_factor),
1726 y: px(y / scale_factor),
1727 }
1728}
1729
1730// https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-dragqueryfilew
1731const DRAGDROP_GET_FILES_COUNT: u32 = 0xFFFFFFFF;