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(),
196 WM_CREATE => self.handle_create_msg(lparam),
197 WM_SETFOCUS => self.handle_set_focus_msg(msg, wparam, lparam),
198 WM_MOVE => self.handle_move_msg(lparam),
199 WM_SIZE => self.handle_size_msg(lparam),
200 WM_NCCALCSIZE => self.handle_calc_client_size(wparam, lparam),
201 WM_DPICHANGED => self.handle_dpi_changed_msg(wparam, lparam),
202 WM_NCHITTEST => self.handle_hit_test_msg(msg, wparam, lparam),
203 WM_PAINT => self.handle_paint_msg(),
204 WM_CLOSE => self.handle_close_msg(),
205 WM_DESTROY => self.handle_destroy_msg(),
206 WM_MOUSEMOVE => self.handle_mouse_move_msg(lparam, wparam),
207 WM_NCMOUSEMOVE => self.handle_nc_mouse_move_msg(lparam),
208 WM_NCLBUTTONDOWN => self.handle_nc_mouse_down_msg(MouseButton::Left, wparam, lparam),
209 WM_NCRBUTTONDOWN => self.handle_nc_mouse_down_msg(MouseButton::Right, wparam, lparam),
210 WM_NCMBUTTONDOWN => self.handle_nc_mouse_down_msg(MouseButton::Middle, wparam, lparam),
211 WM_NCLBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Left, wparam, lparam),
212 WM_NCRBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Right, wparam, lparam),
213 WM_NCMBUTTONUP => self.handle_nc_mouse_up_msg(MouseButton::Middle, wparam, lparam),
214 WM_LBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Left, lparam),
215 WM_RBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Right, lparam),
216 WM_MBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Middle, lparam),
217 WM_XBUTTONDOWN => self.handle_xbutton_msg(wparam, lparam, Self::handle_mouse_down_msg),
218 WM_LBUTTONUP => self.handle_mouse_up_msg(MouseButton::Left, lparam),
219 WM_RBUTTONUP => self.handle_mouse_up_msg(MouseButton::Right, lparam),
220 WM_MBUTTONUP => self.handle_mouse_up_msg(MouseButton::Middle, lparam),
221 WM_XBUTTONUP => self.handle_xbutton_msg(wparam, lparam, Self::handle_mouse_up_msg),
222 WM_MOUSEWHEEL => self.handle_mouse_wheel_msg(wparam, lparam),
223 WM_MOUSEHWHEEL => self.handle_mouse_horizontal_wheel_msg(wparam, lparam),
224 WM_SYSKEYDOWN => self.handle_syskeydown_msg(wparam, lparam),
225 WM_SYSKEYUP => self.handle_syskeyup_msg(wparam),
226 WM_KEYDOWN => self.handle_keydown_msg(msg, wparam, lparam),
227 WM_KEYUP => self.handle_keyup_msg(msg, wparam),
228 WM_CHAR => self.handle_char_msg(msg, wparam, lparam),
229 WM_IME_STARTCOMPOSITION => self.handle_ime_position(),
230 WM_IME_COMPOSITION => self.handle_ime_composition(lparam),
231 WM_IME_CHAR => self.handle_ime_char(wparam),
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 };
598 if callback(PlatformInput::MouseDown(event)).default_prevented {
599 return Some(0);
600 }
601 }
602 Some(1)
603 }
604
605 fn handle_mouse_up_msg(&self, button: MouseButton, lparam: LPARAM) -> Option<isize> {
606 let mut callbacks = self.callbacks.borrow_mut();
607 if let Some(callback) = callbacks.input.as_mut() {
608 let x = lparam.signed_loword() as f32;
609 let y = lparam.signed_hiword() as f32;
610 let scale_factor = self.scale_factor.get();
611 let event = MouseUpEvent {
612 button,
613 position: logical_point(x, y, scale_factor),
614 modifiers: self.current_modifiers(),
615 click_count: 1,
616 };
617 if callback(PlatformInput::MouseUp(event)).default_prevented {
618 return Some(0);
619 }
620 }
621 Some(1)
622 }
623
624 fn handle_xbutton_msg(
625 &self,
626 wparam: WPARAM,
627 lparam: LPARAM,
628 handler: impl Fn(&Self, MouseButton, LPARAM) -> Option<isize>,
629 ) -> Option<isize> {
630 let nav_dir = match wparam.hiword() {
631 XBUTTON1 => NavigationDirection::Back,
632 XBUTTON2 => NavigationDirection::Forward,
633 _ => return Some(1),
634 };
635 handler(self, MouseButton::Navigate(nav_dir), lparam)
636 }
637
638 fn handle_mouse_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
639 let mut callbacks = self.callbacks.borrow_mut();
640 if let Some(callback) = callbacks.input.as_mut() {
641 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
642 * self.platform_inner.settings.borrow().wheel_scroll_lines as f32;
643 let x = lparam.signed_loword() as f32;
644 let y = lparam.signed_hiword() as f32;
645 let scale_factor = self.scale_factor.get();
646 let event = crate::ScrollWheelEvent {
647 position: logical_point(x, y, scale_factor),
648 delta: ScrollDelta::Lines(Point {
649 x: 0.0,
650 y: wheel_distance,
651 }),
652 modifiers: self.current_modifiers(),
653 touch_phase: TouchPhase::Moved,
654 };
655 callback(PlatformInput::ScrollWheel(event));
656 return Some(0);
657 }
658 Some(1)
659 }
660
661 fn handle_mouse_horizontal_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
662 let mut callbacks = self.callbacks.borrow_mut();
663 if let Some(callback) = callbacks.input.as_mut() {
664 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
665 * self.platform_inner.settings.borrow().wheel_scroll_chars as f32;
666 let x = lparam.signed_loword() as f32;
667 let y = lparam.signed_hiword() as f32;
668 let scale_factor = self.scale_factor.get();
669 let event = crate::ScrollWheelEvent {
670 position: logical_point(x, y, scale_factor),
671 delta: ScrollDelta::Lines(Point {
672 x: wheel_distance,
673 y: 0.0,
674 }),
675 modifiers: self.current_modifiers(),
676 touch_phase: TouchPhase::Moved,
677 };
678 if callback(PlatformInput::ScrollWheel(event)).default_prevented {
679 return Some(0);
680 }
681 }
682 Some(1)
683 }
684
685 fn handle_ime_position(&self) -> Option<isize> {
686 unsafe {
687 let ctx = ImmGetContext(self.hwnd);
688 let Some(mut input_handler) = self.input_handler.take() else {
689 return Some(1);
690 };
691 // we are composing, this should never fail
692 let caret_range = input_handler.selected_text_range().unwrap();
693 let caret_position = input_handler.bounds_for_range(caret_range).unwrap();
694 self.input_handler.set(Some(input_handler));
695 let scale_factor = self.scale_factor.get();
696 let config = CANDIDATEFORM {
697 dwStyle: CFS_CANDIDATEPOS,
698 // logical to physical
699 ptCurrentPos: POINT {
700 x: (caret_position.origin.x.0 * scale_factor) as i32,
701 y: (caret_position.origin.y.0 * scale_factor) as i32
702 + ((caret_position.size.height.0 * scale_factor) as i32 / 2),
703 },
704 ..Default::default()
705 };
706 ImmSetCandidateWindow(ctx, &config as _);
707 ImmReleaseContext(self.hwnd, ctx);
708 Some(0)
709 }
710 }
711
712 fn parse_ime_compostion_string(&self) -> Option<(String, usize)> {
713 unsafe {
714 let ctx = ImmGetContext(self.hwnd);
715 let string_len = ImmGetCompositionStringW(ctx, GCS_COMPSTR, None, 0);
716 let result = if string_len >= 0 {
717 let mut buffer = vec![0u8; string_len as usize + 2];
718 // let mut buffer = [0u8; MAX_PATH as _];
719 ImmGetCompositionStringW(
720 ctx,
721 GCS_COMPSTR,
722 Some(buffer.as_mut_ptr() as _),
723 string_len as _,
724 );
725 let wstring = std::slice::from_raw_parts::<u16>(
726 buffer.as_mut_ptr().cast::<u16>(),
727 string_len as usize / 2,
728 );
729 let string = String::from_utf16_lossy(wstring);
730 Some((string, string_len as usize / 2))
731 } else {
732 None
733 };
734 ImmReleaseContext(self.hwnd, ctx);
735 result
736 }
737 }
738
739 fn retrieve_composition_cursor_position(&self) -> usize {
740 unsafe {
741 let ctx = ImmGetContext(self.hwnd);
742 let ret = ImmGetCompositionStringW(ctx, GCS_CURSORPOS, None, 0);
743 ImmReleaseContext(self.hwnd, ctx);
744 ret as usize
745 }
746 }
747
748 fn handle_ime_composition(&self, lparam: LPARAM) -> Option<isize> {
749 if lparam.0 as u32 & GCS_COMPSTR.0 > 0 {
750 let Some((string, string_len)) = self.parse_ime_compostion_string() else {
751 return None;
752 };
753 let Some(mut input_handler) = self.input_handler.take() else {
754 return None;
755 };
756 input_handler.replace_and_mark_text_in_range(
757 None,
758 string.as_str(),
759 Some(0..string_len),
760 );
761 self.input_handler.set(Some(input_handler));
762 *self.last_ime_input.borrow_mut() = Some(string);
763 }
764 if lparam.0 as u32 & GCS_CURSORPOS.0 > 0 {
765 let Some(ref comp_string) = *self.last_ime_input.borrow() else {
766 return None;
767 };
768 let caret_pos = self.retrieve_composition_cursor_position();
769 let Some(mut input_handler) = self.input_handler.take() else {
770 return None;
771 };
772 input_handler.replace_and_mark_text_in_range(None, comp_string, Some(0..caret_pos));
773 self.input_handler.set(Some(input_handler));
774 }
775 // currently, we don't care other stuff
776 None
777 }
778
779 fn parse_ime_char(&self, wparam: WPARAM) -> Option<String> {
780 let src = [wparam.0 as u16];
781 let Ok(first_char) = char::decode_utf16(src).collect::<Vec<_>>()[0] else {
782 return None;
783 };
784 Some(first_char.to_string())
785 }
786
787 fn handle_ime_char(&self, wparam: WPARAM) -> Option<isize> {
788 let Some(ime_char) = self.parse_ime_char(wparam) else {
789 return Some(1);
790 };
791 let Some(mut input_handler) = self.input_handler.take() else {
792 return Some(1);
793 };
794 input_handler.replace_text_in_range(None, &ime_char);
795 self.input_handler.set(Some(input_handler));
796 *self.last_ime_input.borrow_mut() = None;
797 self.invalidate_client_area();
798 Some(0)
799 }
800
801 fn handle_drag_drop(&self, input: PlatformInput) {
802 let mut callbacks = self.callbacks.borrow_mut();
803 let Some(ref mut func) = callbacks.input else {
804 return;
805 };
806 func(input);
807 }
808
809 /// SEE: https://learn.microsoft.com/en-us/windows/win32/winmsg/wm-nccalcsize
810 fn handle_calc_client_size(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
811 if !self.hide_title_bar {
812 return None;
813 }
814
815 if wparam.0 == 0 {
816 return None;
817 }
818
819 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
820
821 let frame_x = unsafe { GetSystemMetricsForDpi(SM_CXFRAME, dpi) };
822 let frame_y = unsafe { GetSystemMetricsForDpi(SM_CYFRAME, dpi) };
823 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) };
824
825 // wparam is TRUE so lparam points to an NCCALCSIZE_PARAMS structure
826 let mut params = lparam.0 as *mut NCCALCSIZE_PARAMS;
827 let mut requested_client_rect = unsafe { &mut ((*params).rgrc) };
828
829 requested_client_rect[0].right -= frame_x + padding;
830 requested_client_rect[0].left += frame_x + padding;
831 requested_client_rect[0].bottom -= frame_y + padding;
832
833 Some(0)
834 }
835
836 fn handle_activate_msg(&self) -> Option<isize> {
837 if self.hide_title_bar {
838 if let Some(titlebar_rect) = self.get_titlebar_rect().log_err() {
839 unsafe { InvalidateRect(self.hwnd, Some(&titlebar_rect), FALSE) };
840 }
841 }
842 None
843 }
844
845 fn handle_create_msg(&self, _lparam: LPARAM) -> Option<isize> {
846 let mut size_rect = RECT::default();
847 unsafe { GetWindowRect(self.hwnd, &mut size_rect).log_err() };
848
849 let width = size_rect.right - size_rect.left;
850 let height = size_rect.bottom - size_rect.top;
851
852 self.physical_size.set(Size {
853 width: GlobalPixels(width as f32),
854 height: GlobalPixels(height as f32),
855 });
856
857 if self.hide_title_bar {
858 // Inform the application of the frame change to force redrawing with the new
859 // client area that is extended into the title bar
860 unsafe {
861 SetWindowPos(
862 self.hwnd,
863 HWND::default(),
864 size_rect.left,
865 size_rect.top,
866 width,
867 height,
868 SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE,
869 )
870 .log_err()
871 };
872 }
873
874 Some(0)
875 }
876
877 fn handle_dpi_changed_msg(&self, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
878 let new_dpi = wparam.loword() as f32;
879 let scale_factor = new_dpi / USER_DEFAULT_SCREEN_DPI as f32;
880 self.scale_factor.set(scale_factor);
881 let rect = unsafe { &*(lparam.0 as *const RECT) };
882 let width = rect.right - rect.left;
883 let height = rect.bottom - rect.top;
884 // this will emit `WM_SIZE` and `WM_MOVE` right here
885 // even before this function returns
886 // the new size is handled in `WM_SIZE`
887 unsafe {
888 SetWindowPos(
889 self.hwnd,
890 None,
891 rect.left,
892 rect.top,
893 width,
894 height,
895 SWP_NOZORDER | SWP_NOACTIVATE,
896 )
897 .context("unable to set window position after dpi has changed")
898 .log_err();
899 }
900 self.invalidate_client_area();
901 Some(0)
902 }
903
904 fn handle_hit_test_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> Option<isize> {
905 if !self.hide_title_bar {
906 return None;
907 }
908
909 // default handler for resize areas
910 let hit = unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) };
911 if matches!(
912 hit.0 as u32,
913 HTNOWHERE
914 | HTRIGHT
915 | HTLEFT
916 | HTTOPLEFT
917 | HTTOP
918 | HTTOPRIGHT
919 | HTBOTTOMRIGHT
920 | HTBOTTOM
921 | HTBOTTOMLEFT
922 ) {
923 return Some(hit.0);
924 }
925
926 let dpi = unsafe { GetDpiForWindow(self.hwnd) };
927 let frame_y = unsafe { GetSystemMetricsForDpi(SM_CYFRAME, dpi) };
928 let padding = unsafe { GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) };
929
930 let mut cursor_point = POINT {
931 x: lparam.signed_loword().into(),
932 y: lparam.signed_hiword().into(),
933 };
934 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
935 if cursor_point.y > 0 && cursor_point.y < frame_y + padding {
936 return Some(HTTOP as _);
937 }
938
939 let titlebar_rect = self.get_titlebar_rect();
940 if let Ok(titlebar_rect) = titlebar_rect {
941 if cursor_point.y < titlebar_rect.bottom {
942 let caption_btn_width =
943 (self.caption_button_width().0 * self.scale_factor.get()) as i32;
944 if cursor_point.x >= titlebar_rect.right - caption_btn_width {
945 return Some(HTCLOSE as _);
946 } else if cursor_point.x >= titlebar_rect.right - caption_btn_width * 2 {
947 return Some(HTMAXBUTTON as _);
948 } else if cursor_point.x >= titlebar_rect.right - caption_btn_width * 3 {
949 return Some(HTMINBUTTON as _);
950 }
951
952 return Some(HTCAPTION as _);
953 }
954 }
955
956 Some(HTCLIENT as _)
957 }
958
959 fn handle_nc_mouse_move_msg(&self, lparam: LPARAM) -> Option<isize> {
960 if !self.hide_title_bar {
961 return None;
962 }
963
964 let mut callbacks = self.callbacks.borrow_mut();
965 if let Some(callback) = callbacks.input.as_mut() {
966 let mut cursor_point = POINT {
967 x: lparam.signed_loword().into(),
968 y: lparam.signed_hiword().into(),
969 };
970 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
971 let scale_factor = self.scale_factor.get();
972 let event = MouseMoveEvent {
973 position: logical_point(cursor_point.x as f32, cursor_point.y as f32, scale_factor),
974 pressed_button: None,
975 modifiers: self.current_modifiers(),
976 };
977 if callback(PlatformInput::MouseMove(event)).default_prevented {
978 return Some(0);
979 }
980 }
981 None
982 }
983
984 fn handle_nc_mouse_down_msg(
985 &self,
986 button: MouseButton,
987 wparam: WPARAM,
988 lparam: LPARAM,
989 ) -> Option<isize> {
990 if !self.hide_title_bar {
991 return None;
992 }
993
994 let mut callbacks = self.callbacks.borrow_mut();
995 if let Some(callback) = callbacks.input.as_mut() {
996 let mut cursor_point = POINT {
997 x: lparam.signed_loword().into(),
998 y: lparam.signed_hiword().into(),
999 };
1000 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
1001 let scale_factor = self.scale_factor.get();
1002 let event = MouseDownEvent {
1003 button,
1004 position: logical_point(cursor_point.x as f32, cursor_point.y as f32, scale_factor),
1005 modifiers: self.current_modifiers(),
1006 click_count: 1,
1007 };
1008 if callback(PlatformInput::MouseDown(event)).default_prevented {
1009 return Some(0);
1010 }
1011 }
1012
1013 // Since these are handled in handle_nc_mouse_up_msg we must prevent the default window proc
1014 matches!(wparam.0 as u32, HTMINBUTTON | HTMAXBUTTON | HTCLOSE).then_some(0)
1015 }
1016
1017 fn handle_nc_mouse_up_msg(
1018 &self,
1019 button: MouseButton,
1020 wparam: WPARAM,
1021 lparam: LPARAM,
1022 ) -> Option<isize> {
1023 if !self.hide_title_bar {
1024 return None;
1025 }
1026
1027 let mut callbacks = self.callbacks.borrow_mut();
1028 if let Some(callback) = callbacks.input.as_mut() {
1029 let mut cursor_point = POINT {
1030 x: lparam.signed_loword().into(),
1031 y: lparam.signed_hiword().into(),
1032 };
1033 unsafe { ScreenToClient(self.hwnd, &mut cursor_point) };
1034 let scale_factor = self.scale_factor.get();
1035 let event = MouseUpEvent {
1036 button,
1037 position: logical_point(cursor_point.x as f32, cursor_point.y as f32, scale_factor),
1038 modifiers: self.current_modifiers(),
1039 click_count: 1,
1040 };
1041 if callback(PlatformInput::MouseUp(event)).default_prevented {
1042 return Some(0);
1043 }
1044 }
1045 drop(callbacks);
1046
1047 if button == MouseButton::Left {
1048 match wparam.0 as u32 {
1049 HTMINBUTTON => unsafe {
1050 ShowWindowAsync(self.hwnd, SW_MINIMIZE);
1051 },
1052 HTMAXBUTTON => unsafe {
1053 if self.is_maximized() {
1054 ShowWindowAsync(self.hwnd, SW_NORMAL);
1055 } else {
1056 ShowWindowAsync(self.hwnd, SW_MAXIMIZE);
1057 }
1058 },
1059 HTCLOSE => unsafe {
1060 PostMessageW(self.hwnd, WM_CLOSE, WPARAM::default(), LPARAM::default())
1061 .log_err();
1062 },
1063 _ => return None,
1064 };
1065 return Some(0);
1066 }
1067
1068 None
1069 }
1070
1071 fn handle_set_focus_msg(&self, _msg: u32, wparam: WPARAM, _lparam: LPARAM) -> Option<isize> {
1072 // wparam is the window that just lost focus (may be null)
1073 // SEE: https://learn.microsoft.com/en-us/windows/win32/inputdev/wm-setfocus
1074 let lost_focus_hwnd = HWND(wparam.0 as isize);
1075 if let Some(lost_focus_window) = self
1076 .platform_inner
1077 .try_get_windows_inner_from_hwnd(lost_focus_hwnd)
1078 {
1079 let mut callbacks = lost_focus_window.callbacks.borrow_mut();
1080 if let Some(mut cb) = callbacks.active_status_change.as_mut() {
1081 cb(false);
1082 }
1083 }
1084
1085 let mut callbacks = self.callbacks.borrow_mut();
1086 if let Some(mut cb) = callbacks.active_status_change.as_mut() {
1087 cb(true);
1088 }
1089
1090 Some(0)
1091 }
1092}
1093
1094#[derive(Default)]
1095struct Callbacks {
1096 request_frame: Option<Box<dyn FnMut()>>,
1097 input: Option<Box<dyn FnMut(crate::PlatformInput) -> DispatchEventResult>>,
1098 active_status_change: Option<Box<dyn FnMut(bool)>>,
1099 resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
1100 fullscreen: Option<Box<dyn FnMut(bool)>>,
1101 moved: Option<Box<dyn FnMut()>>,
1102 should_close: Option<Box<dyn FnMut() -> bool>>,
1103 close: Option<Box<dyn FnOnce()>>,
1104 appearance_changed: Option<Box<dyn FnMut()>>,
1105}
1106
1107pub(crate) struct WindowsWindow {
1108 inner: Rc<WindowsWindowInner>,
1109 drag_drop_handler: IDropTarget,
1110}
1111
1112struct WindowCreateContext {
1113 inner: Option<Rc<WindowsWindowInner>>,
1114 platform_inner: Rc<WindowsPlatformInner>,
1115 handle: AnyWindowHandle,
1116 hide_title_bar: bool,
1117 display: Rc<WindowsDisplay>,
1118}
1119
1120impl WindowsWindow {
1121 pub(crate) fn new(
1122 platform_inner: Rc<WindowsPlatformInner>,
1123 handle: AnyWindowHandle,
1124 options: WindowParams,
1125 ) -> Self {
1126 let classname = register_wnd_class(platform_inner.icon);
1127 let hide_title_bar = options
1128 .titlebar
1129 .as_ref()
1130 .map(|titlebar| titlebar.appears_transparent)
1131 .unwrap_or(false);
1132 let windowname = HSTRING::from(
1133 options
1134 .titlebar
1135 .as_ref()
1136 .and_then(|titlebar| titlebar.title.as_ref())
1137 .map(|title| title.as_ref())
1138 .unwrap_or(""),
1139 );
1140 let dwstyle = WS_THICKFRAME | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX;
1141 let x = options.bounds.origin.x.0 as i32;
1142 let y = options.bounds.origin.y.0 as i32;
1143 let nwidth = options.bounds.size.width.0 as i32;
1144 let nheight = options.bounds.size.height.0 as i32;
1145 let hwndparent = HWND::default();
1146 let hmenu = HMENU::default();
1147 let hinstance = HINSTANCE::default();
1148 let mut context = WindowCreateContext {
1149 inner: None,
1150 platform_inner: platform_inner.clone(),
1151 handle,
1152 hide_title_bar,
1153 // todo(windows) move window to target monitor
1154 // options.display_id
1155 display: Rc::new(WindowsDisplay::primary_monitor().unwrap()),
1156 };
1157 let lpparam = Some(&context as *const _ as *const _);
1158 unsafe {
1159 CreateWindowExW(
1160 WS_EX_APPWINDOW,
1161 classname,
1162 &windowname,
1163 dwstyle,
1164 x,
1165 y,
1166 nwidth,
1167 nheight,
1168 hwndparent,
1169 hmenu,
1170 hinstance,
1171 lpparam,
1172 )
1173 };
1174 let drag_drop_handler = {
1175 let inner = context.inner.as_ref().unwrap();
1176 let handler = WindowsDragDropHandler(Rc::clone(inner));
1177 let drag_drop_handler: IDropTarget = handler.into();
1178 unsafe {
1179 RegisterDragDrop(inner.hwnd, &drag_drop_handler)
1180 .expect("unable to register drag-drop event")
1181 };
1182 drag_drop_handler
1183 };
1184 let wnd = Self {
1185 inner: context.inner.unwrap(),
1186 drag_drop_handler,
1187 };
1188 platform_inner
1189 .raw_window_handles
1190 .write()
1191 .push(wnd.inner.hwnd);
1192
1193 unsafe { ShowWindow(wnd.inner.hwnd, SW_SHOW) };
1194 wnd
1195 }
1196}
1197
1198impl HasWindowHandle for WindowsWindow {
1199 fn window_handle(
1200 &self,
1201 ) -> Result<raw_window_handle::WindowHandle<'_>, raw_window_handle::HandleError> {
1202 let raw = raw_window_handle::Win32WindowHandle::new(unsafe {
1203 NonZeroIsize::new_unchecked(self.inner.hwnd.0)
1204 })
1205 .into();
1206 Ok(unsafe { raw_window_handle::WindowHandle::borrow_raw(raw) })
1207 }
1208}
1209
1210// todo(windows)
1211impl HasDisplayHandle for WindowsWindow {
1212 fn display_handle(
1213 &self,
1214 ) -> Result<raw_window_handle::DisplayHandle<'_>, raw_window_handle::HandleError> {
1215 unimplemented!()
1216 }
1217}
1218
1219impl Drop for WindowsWindow {
1220 fn drop(&mut self) {
1221 unsafe {
1222 let _ = RevokeDragDrop(self.inner.hwnd);
1223 }
1224 }
1225}
1226
1227impl PlatformWindow for WindowsWindow {
1228 fn bounds(&self) -> Bounds<GlobalPixels> {
1229 Bounds {
1230 origin: self.inner.origin.get(),
1231 size: self.inner.physical_size.get(),
1232 }
1233 }
1234
1235 fn is_maximized(&self) -> bool {
1236 self.inner.is_maximized()
1237 }
1238
1239 fn is_minimized(&self) -> bool {
1240 self.inner.is_minimized()
1241 }
1242
1243 /// get the logical size of the app's drawable area.
1244 ///
1245 /// Currently, GPUI uses logical size of the app to handle mouse interactions (such as
1246 /// whether the mouse collides with other elements of GPUI).
1247 fn content_size(&self) -> Size<Pixels> {
1248 logical_size(
1249 self.inner.physical_size.get(),
1250 self.inner.scale_factor.get(),
1251 )
1252 }
1253
1254 fn scale_factor(&self) -> f32 {
1255 self.inner.scale_factor.get()
1256 }
1257
1258 // todo(windows)
1259 fn appearance(&self) -> WindowAppearance {
1260 WindowAppearance::Dark
1261 }
1262
1263 fn display(&self) -> Rc<dyn PlatformDisplay> {
1264 self.inner.display.borrow().clone()
1265 }
1266
1267 fn mouse_position(&self) -> Point<Pixels> {
1268 let point = unsafe {
1269 let mut point: POINT = std::mem::zeroed();
1270 GetCursorPos(&mut point)
1271 .context("unable to get cursor position")
1272 .log_err();
1273 ScreenToClient(self.inner.hwnd, &mut point);
1274 point
1275 };
1276 logical_point(
1277 point.x as f32,
1278 point.y as f32,
1279 self.inner.scale_factor.get(),
1280 )
1281 }
1282
1283 // todo(windows)
1284 fn modifiers(&self) -> Modifiers {
1285 Modifiers::none()
1286 }
1287
1288 fn as_any_mut(&mut self) -> &mut dyn Any {
1289 self
1290 }
1291
1292 // todo(windows)
1293 fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
1294 self.inner.input_handler.set(Some(input_handler));
1295 }
1296
1297 // todo(windows)
1298 fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
1299 self.inner.input_handler.take()
1300 }
1301
1302 fn prompt(
1303 &self,
1304 level: PromptLevel,
1305 msg: &str,
1306 detail: Option<&str>,
1307 answers: &[&str],
1308 ) -> Option<Receiver<usize>> {
1309 let (done_tx, done_rx) = oneshot::channel();
1310 let msg = msg.to_string();
1311 let detail_string = match detail {
1312 Some(info) => Some(info.to_string()),
1313 None => None,
1314 };
1315 let answers = answers.iter().map(|s| s.to_string()).collect::<Vec<_>>();
1316 let handle = self.inner.hwnd;
1317 self.inner
1318 .platform_inner
1319 .foreground_executor
1320 .spawn(async move {
1321 unsafe {
1322 let mut config;
1323 config = std::mem::zeroed::<TASKDIALOGCONFIG>();
1324 config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
1325 config.hwndParent = handle;
1326 let title;
1327 let main_icon;
1328 match level {
1329 crate::PromptLevel::Info => {
1330 title = windows::core::w!("Info");
1331 main_icon = TD_INFORMATION_ICON;
1332 }
1333 crate::PromptLevel::Warning => {
1334 title = windows::core::w!("Warning");
1335 main_icon = TD_WARNING_ICON;
1336 }
1337 crate::PromptLevel::Critical => {
1338 title = windows::core::w!("Critical");
1339 main_icon = TD_ERROR_ICON;
1340 }
1341 };
1342 config.pszWindowTitle = title;
1343 config.Anonymous1.pszMainIcon = main_icon;
1344 let instruction = msg.encode_utf16().chain(once(0)).collect_vec();
1345 config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
1346 let hints_encoded;
1347 if let Some(ref hints) = detail_string {
1348 hints_encoded = hints.encode_utf16().chain(once(0)).collect_vec();
1349 config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
1350 };
1351 let mut buttons = Vec::new();
1352 let mut btn_encoded = Vec::new();
1353 for (index, btn_string) in answers.iter().enumerate() {
1354 let encoded = btn_string.encode_utf16().chain(once(0)).collect_vec();
1355 buttons.push(TASKDIALOG_BUTTON {
1356 nButtonID: index as _,
1357 pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
1358 });
1359 btn_encoded.push(encoded);
1360 }
1361 config.cButtons = buttons.len() as _;
1362 config.pButtons = buttons.as_ptr();
1363
1364 config.pfCallback = None;
1365 let mut res = std::mem::zeroed();
1366 let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
1367 .inspect_err(|e| log::error!("unable to create task dialog: {}", e));
1368
1369 let _ = done_tx.send(res as usize);
1370 }
1371 })
1372 .detach();
1373
1374 Some(done_rx)
1375 }
1376
1377 fn activate(&self) {
1378 unsafe { SetActiveWindow(self.inner.hwnd) };
1379 unsafe { SetFocus(self.inner.hwnd) };
1380 unsafe { SetForegroundWindow(self.inner.hwnd) };
1381 }
1382
1383 // todo(windows)
1384 fn set_title(&mut self, title: &str) {
1385 unsafe { SetWindowTextW(self.inner.hwnd, &HSTRING::from(title)) }
1386 .inspect_err(|e| log::error!("Set title failed: {e}"))
1387 .ok();
1388 }
1389
1390 // todo(windows)
1391 fn set_edited(&mut self, _edited: bool) {}
1392
1393 // todo(windows)
1394 fn show_character_palette(&self) {}
1395
1396 fn minimize(&self) {
1397 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MINIMIZE) };
1398 }
1399
1400 fn zoom(&self) {
1401 unsafe { ShowWindowAsync(self.inner.hwnd, SW_MAXIMIZE) };
1402 }
1403
1404 // todo(windows)
1405 fn toggle_fullscreen(&self) {}
1406
1407 // todo(windows)
1408 fn is_fullscreen(&self) -> bool {
1409 false
1410 }
1411
1412 // todo(windows)
1413 fn on_request_frame(&self, callback: Box<dyn FnMut()>) {
1414 self.inner.callbacks.borrow_mut().request_frame = Some(callback);
1415 }
1416
1417 // todo(windows)
1418 fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> DispatchEventResult>) {
1419 self.inner.callbacks.borrow_mut().input = Some(callback);
1420 }
1421
1422 // todo(windows)
1423 fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
1424 self.inner.callbacks.borrow_mut().active_status_change = Some(callback);
1425 }
1426
1427 // todo(windows)
1428 fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
1429 self.inner.callbacks.borrow_mut().resize = Some(callback);
1430 }
1431
1432 // todo(windows)
1433 fn on_fullscreen(&self, callback: Box<dyn FnMut(bool)>) {
1434 self.inner.callbacks.borrow_mut().fullscreen = Some(callback);
1435 }
1436
1437 // todo(windows)
1438 fn on_moved(&self, callback: Box<dyn FnMut()>) {
1439 self.inner.callbacks.borrow_mut().moved = Some(callback);
1440 }
1441
1442 // todo(windows)
1443 fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
1444 self.inner.callbacks.borrow_mut().should_close = Some(callback);
1445 }
1446
1447 // todo(windows)
1448 fn on_close(&self, callback: Box<dyn FnOnce()>) {
1449 self.inner.callbacks.borrow_mut().close = Some(callback);
1450 }
1451
1452 // todo(windows)
1453 fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
1454 self.inner.callbacks.borrow_mut().appearance_changed = Some(callback);
1455 }
1456
1457 // todo(windows)
1458 fn is_topmost_for_position(&self, _position: Point<Pixels>) -> bool {
1459 true
1460 }
1461
1462 // todo(windows)
1463 fn draw(&self, scene: &Scene) {
1464 self.inner.renderer.borrow_mut().draw(scene)
1465 }
1466
1467 // todo(windows)
1468 fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
1469 self.inner.renderer.borrow().sprite_atlas().clone()
1470 }
1471
1472 fn get_raw_handle(&self) -> HWND {
1473 self.inner.hwnd
1474 }
1475}
1476
1477#[implement(IDropTarget)]
1478struct WindowsDragDropHandler(pub Rc<WindowsWindowInner>);
1479
1480#[allow(non_snake_case)]
1481impl IDropTarget_Impl for WindowsDragDropHandler {
1482 fn DragEnter(
1483 &self,
1484 pdataobj: Option<&IDataObject>,
1485 _grfkeystate: MODIFIERKEYS_FLAGS,
1486 pt: &POINTL,
1487 pdweffect: *mut DROPEFFECT,
1488 ) -> windows::core::Result<()> {
1489 unsafe {
1490 let Some(idata_obj) = pdataobj else {
1491 log::info!("no dragging file or directory detected");
1492 return Ok(());
1493 };
1494 let config = FORMATETC {
1495 cfFormat: CF_HDROP.0,
1496 ptd: std::ptr::null_mut() as _,
1497 dwAspect: DVASPECT_CONTENT.0,
1498 lindex: -1,
1499 tymed: TYMED_HGLOBAL.0 as _,
1500 };
1501 let mut paths = SmallVec::<[PathBuf; 2]>::new();
1502 if idata_obj.QueryGetData(&config as _) == S_OK {
1503 *pdweffect = DROPEFFECT_LINK;
1504 let Ok(mut idata) = idata_obj.GetData(&config as _) else {
1505 return Ok(());
1506 };
1507 if idata.u.hGlobal.is_invalid() {
1508 return Ok(());
1509 }
1510 let hdrop = idata.u.hGlobal.0 as *mut HDROP;
1511 let file_count = DragQueryFileW(*hdrop, DRAGDROP_GET_FILES_COUNT, None);
1512 for file_index in 0..file_count {
1513 let filename_length = DragQueryFileW(*hdrop, file_index, None) as usize;
1514 let mut buffer = vec![0u16; filename_length + 1];
1515 let ret = DragQueryFileW(*hdrop, file_index, Some(buffer.as_mut_slice()));
1516 if ret == 0 {
1517 log::error!("unable to read file name");
1518 continue;
1519 }
1520 if let Ok(file_name) = String::from_utf16(&buffer[0..filename_length]) {
1521 if let Ok(path) = PathBuf::from_str(&file_name) {
1522 paths.push(path);
1523 }
1524 }
1525 }
1526 ReleaseStgMedium(&mut idata);
1527 let input = PlatformInput::FileDrop(crate::FileDropEvent::Entered {
1528 position: Point {
1529 x: Pixels(pt.x as _),
1530 y: Pixels(pt.y as _),
1531 },
1532 paths: crate::ExternalPaths(paths),
1533 });
1534 self.0.handle_drag_drop(input);
1535 } else {
1536 *pdweffect = DROPEFFECT_NONE;
1537 }
1538 }
1539 Ok(())
1540 }
1541
1542 fn DragOver(
1543 &self,
1544 _grfkeystate: MODIFIERKEYS_FLAGS,
1545 pt: &POINTL,
1546 _pdweffect: *mut DROPEFFECT,
1547 ) -> windows::core::Result<()> {
1548 let input = PlatformInput::FileDrop(crate::FileDropEvent::Pending {
1549 position: Point {
1550 x: Pixels(pt.x as _),
1551 y: Pixels(pt.y as _),
1552 },
1553 });
1554 self.0.handle_drag_drop(input);
1555
1556 Ok(())
1557 }
1558
1559 fn DragLeave(&self) -> windows::core::Result<()> {
1560 let input = PlatformInput::FileDrop(crate::FileDropEvent::Exited);
1561 self.0.handle_drag_drop(input);
1562
1563 Ok(())
1564 }
1565
1566 fn Drop(
1567 &self,
1568 _pdataobj: Option<&IDataObject>,
1569 _grfkeystate: MODIFIERKEYS_FLAGS,
1570 pt: &POINTL,
1571 _pdweffect: *mut DROPEFFECT,
1572 ) -> windows::core::Result<()> {
1573 let input = PlatformInput::FileDrop(crate::FileDropEvent::Submit {
1574 position: Point {
1575 x: Pixels(pt.x as _),
1576 y: Pixels(pt.y as _),
1577 },
1578 });
1579 self.0.handle_drag_drop(input);
1580
1581 Ok(())
1582 }
1583}
1584
1585fn register_wnd_class(icon_handle: HICON) -> PCWSTR {
1586 const CLASS_NAME: PCWSTR = w!("Zed::Window");
1587
1588 static ONCE: Once = Once::new();
1589 ONCE.call_once(|| {
1590 let wc = WNDCLASSW {
1591 lpfnWndProc: Some(wnd_proc),
1592 hIcon: icon_handle,
1593 hCursor: unsafe { LoadCursorW(None, IDC_ARROW).ok().unwrap() },
1594 lpszClassName: PCWSTR(CLASS_NAME.as_ptr()),
1595 style: CS_HREDRAW | CS_VREDRAW,
1596 ..Default::default()
1597 };
1598 unsafe { RegisterClassW(&wc) };
1599 });
1600
1601 CLASS_NAME
1602}
1603
1604unsafe extern "system" fn wnd_proc(
1605 hwnd: HWND,
1606 msg: u32,
1607 wparam: WPARAM,
1608 lparam: LPARAM,
1609) -> LRESULT {
1610 if msg == WM_NCCREATE {
1611 let cs = lparam.0 as *const CREATESTRUCTW;
1612 let cs = unsafe { &*cs };
1613 let ctx = cs.lpCreateParams as *mut WindowCreateContext;
1614 let ctx = unsafe { &mut *ctx };
1615 let inner = Rc::new(WindowsWindowInner::new(
1616 hwnd,
1617 cs,
1618 ctx.platform_inner.clone(),
1619 ctx.handle,
1620 ctx.hide_title_bar,
1621 ctx.display.clone(),
1622 ));
1623 let weak = Box::new(Rc::downgrade(&inner));
1624 unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
1625 ctx.inner = Some(inner);
1626 return LRESULT(1);
1627 }
1628 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1629 if ptr.is_null() {
1630 return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
1631 }
1632 let inner = unsafe { &*ptr };
1633 let r = if let Some(inner) = inner.upgrade() {
1634 inner.handle_msg(msg, wparam, lparam)
1635 } else {
1636 unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
1637 };
1638 if msg == WM_NCDESTROY {
1639 unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
1640 unsafe { drop(Box::from_raw(ptr)) };
1641 }
1642 r
1643}
1644
1645pub(crate) fn try_get_window_inner(hwnd: HWND) -> Option<Rc<WindowsWindowInner>> {
1646 if hwnd == HWND(0) {
1647 return None;
1648 }
1649
1650 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1651 if !ptr.is_null() {
1652 let inner = unsafe { &*ptr };
1653 inner.upgrade()
1654 } else {
1655 None
1656 }
1657}
1658
1659fn basic_vkcode_to_string(code: u16, modifiers: Modifiers) -> Option<Keystroke> {
1660 match code {
1661 // VK_0 - VK_9
1662 48..=57 => Some(Keystroke {
1663 modifiers,
1664 key: format!("{}", code - VK_0.0),
1665 ime_key: None,
1666 }),
1667 // VK_A - VK_Z
1668 65..=90 => Some(Keystroke {
1669 modifiers,
1670 key: format!("{}", (b'a' + code as u8 - VK_A.0 as u8) as char),
1671 ime_key: None,
1672 }),
1673 // VK_F1 - VK_F24
1674 112..=135 => Some(Keystroke {
1675 modifiers,
1676 key: format!("f{}", code - VK_F1.0 + 1),
1677 ime_key: None,
1678 }),
1679 // OEM3: `/~, OEM_MINUS: -/_, OEM_PLUS: =/+, ...
1680 _ => {
1681 if let Some(key) = oemkey_vkcode_to_string(code) {
1682 Some(Keystroke {
1683 modifiers,
1684 key,
1685 ime_key: None,
1686 })
1687 } else {
1688 None
1689 }
1690 }
1691 }
1692}
1693
1694fn oemkey_vkcode_to_string(code: u16) -> Option<String> {
1695 match code {
1696 186 => Some(";".to_string()), // VK_OEM_1
1697 187 => Some("=".to_string()), // VK_OEM_PLUS
1698 188 => Some(",".to_string()), // VK_OEM_COMMA
1699 189 => Some("-".to_string()), // VK_OEM_MINUS
1700 190 => Some(".".to_string()), // VK_OEM_PERIOD
1701 // https://kbdlayout.info/features/virtualkeys/VK_ABNT_C1
1702 191 | 193 => Some("/".to_string()), // VK_OEM_2 VK_ABNT_C1
1703 192 => Some("`".to_string()), // VK_OEM_3
1704 219 => Some("[".to_string()), // VK_OEM_4
1705 220 => Some("\\".to_string()), // VK_OEM_5
1706 221 => Some("]".to_string()), // VK_OEM_6
1707 222 => Some("'".to_string()), // VK_OEM_7
1708 _ => None,
1709 }
1710}
1711
1712#[inline]
1713fn logical_size(physical_size: Size<GlobalPixels>, scale_factor: f32) -> Size<Pixels> {
1714 Size {
1715 width: px(physical_size.width.0 / scale_factor),
1716 height: px(physical_size.height.0 / scale_factor),
1717 }
1718}
1719
1720#[inline]
1721fn logical_point(x: f32, y: f32, scale_factor: f32) -> Point<Pixels> {
1722 Point {
1723 x: px(x / scale_factor),
1724 y: px(y / scale_factor),
1725 }
1726}
1727
1728// https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-dragqueryfilew
1729const DRAGDROP_GET_FILES_COUNT: u32 = 0xFFFFFFFF;