1#![deny(unsafe_op_in_unsafe_fn)]
2// todo(windows): remove
3#![allow(unused_variables)]
4
5use std::{
6 any::Any,
7 cell::{Cell, RefCell},
8 ffi::c_void,
9 iter::once,
10 num::NonZeroIsize,
11 path::PathBuf,
12 rc::{Rc, Weak},
13 str::FromStr,
14 sync::{Arc, Once},
15};
16
17use blade_graphics as gpu;
18use futures::channel::oneshot::{self, Receiver};
19use itertools::Itertools;
20use raw_window_handle::{HasDisplayHandle, HasWindowHandle};
21use smallvec::SmallVec;
22use windows::{
23 core::{implement, w, HSTRING, PCWSTR},
24 Win32::{
25 Foundation::{FALSE, HINSTANCE, HWND, LPARAM, LRESULT, POINTL, S_OK, WPARAM},
26 Graphics::Gdi::{BeginPaint, EndPaint, InvalidateRect, PAINTSTRUCT},
27 System::{
28 Com::{IDataObject, DVASPECT_CONTENT, FORMATETC, TYMED_HGLOBAL},
29 Ole::{
30 IDropTarget, IDropTarget_Impl, RegisterDragDrop, ReleaseStgMedium, RevokeDragDrop,
31 CF_HDROP, DROPEFFECT, DROPEFFECT_LINK, DROPEFFECT_NONE,
32 },
33 SystemServices::{
34 MK_LBUTTON, MK_MBUTTON, MK_RBUTTON, MK_XBUTTON1, MK_XBUTTON2, MODIFIERKEYS_FLAGS,
35 },
36 },
37 UI::{
38 Controls::{
39 TaskDialogIndirect, TASKDIALOGCONFIG, TASKDIALOG_BUTTON, TD_ERROR_ICON,
40 TD_INFORMATION_ICON, TD_WARNING_ICON,
41 },
42 Input::KeyboardAndMouse::{
43 GetKeyState, VIRTUAL_KEY, VK_BACK, VK_CONTROL, VK_DOWN, VK_END, VK_ESCAPE, VK_F1,
44 VK_F24, VK_HOME, VK_INSERT, VK_LEFT, VK_LWIN, VK_MENU, VK_NEXT, VK_PRIOR,
45 VK_RETURN, VK_RIGHT, VK_RWIN, VK_SHIFT, VK_SPACE, VK_TAB, VK_UP,
46 },
47 Shell::{DragQueryFileW, HDROP},
48 WindowsAndMessaging::{
49 CreateWindowExW, DefWindowProcW, GetWindowLongPtrW, LoadCursorW, PostQuitMessage,
50 RegisterClassW, SetWindowLongPtrW, SetWindowTextW, ShowWindow, CREATESTRUCTW,
51 GWLP_USERDATA, HMENU, IDC_ARROW, SW_MAXIMIZE, SW_SHOW, WHEEL_DELTA,
52 WINDOW_EX_STYLE, WINDOW_LONG_PTR_INDEX, WM_CHAR, WM_CLOSE, WM_DESTROY, WM_KEYDOWN,
53 WM_KEYUP, WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MBUTTONDOWN, WM_MBUTTONUP,
54 WM_MOUSEHWHEEL, WM_MOUSEMOVE, WM_MOUSEWHEEL, WM_MOVE, WM_NCCREATE, WM_NCDESTROY,
55 WM_PAINT, WM_RBUTTONDOWN, WM_RBUTTONUP, WM_SIZE, WM_SYSCHAR, WM_SYSKEYDOWN,
56 WM_SYSKEYUP, WM_XBUTTONDOWN, WM_XBUTTONUP, WNDCLASSW, WS_OVERLAPPEDWINDOW,
57 WS_VISIBLE, XBUTTON1, XBUTTON2,
58 },
59 },
60 },
61};
62
63use crate::{
64 platform::blade::BladeRenderer, AnyWindowHandle, Bounds, GlobalPixels, HiLoWord, KeyDownEvent,
65 KeyUpEvent, Keystroke, Modifiers, MouseButton, MouseDownEvent, MouseMoveEvent, MouseUpEvent,
66 NavigationDirection, Pixels, PlatformAtlas, PlatformDisplay, PlatformInput,
67 PlatformInputHandler, PlatformWindow, Point, PromptLevel, Scene, ScrollDelta, Size, TouchPhase,
68 WindowAppearance, WindowParams, WindowsDisplay, WindowsPlatformInner,
69};
70
71#[derive(PartialEq)]
72pub(crate) enum CallbackResult {
73 /// handled by system or user callback
74 Handled {
75 /// `true` if user callback handled event
76 by_callback: bool,
77 },
78 Unhandled,
79}
80
81impl CallbackResult {
82 pub fn is_handled(&self) -> bool {
83 match self {
84 Self::Handled { by_callback: _ } => true,
85 _ => false,
86 }
87 }
88}
89
90pub(crate) struct WindowsWindowInner {
91 hwnd: HWND,
92 origin: Cell<Point<GlobalPixels>>,
93 size: Cell<Size<GlobalPixels>>,
94 mouse_position: Cell<Point<Pixels>>,
95 input_handler: Cell<Option<PlatformInputHandler>>,
96 renderer: RefCell<BladeRenderer>,
97 callbacks: RefCell<Callbacks>,
98 platform_inner: Rc<WindowsPlatformInner>,
99 handle: AnyWindowHandle,
100}
101
102impl WindowsWindowInner {
103 fn new(
104 hwnd: HWND,
105 cs: &CREATESTRUCTW,
106 platform_inner: Rc<WindowsPlatformInner>,
107 handle: AnyWindowHandle,
108 ) -> Self {
109 let origin = Cell::new(Point::new((cs.x as f64).into(), (cs.y as f64).into()));
110 let size = Cell::new(Size {
111 width: (cs.cx as f64).into(),
112 height: (cs.cy as f64).into(),
113 });
114 let mouse_position = Cell::new(Point::default());
115 let input_handler = Cell::new(None);
116 struct RawWindow {
117 hwnd: *mut c_void,
118 }
119 unsafe impl blade_rwh::HasRawWindowHandle for RawWindow {
120 fn raw_window_handle(&self) -> blade_rwh::RawWindowHandle {
121 let mut handle = blade_rwh::Win32WindowHandle::empty();
122 handle.hwnd = self.hwnd;
123 handle.into()
124 }
125 }
126 unsafe impl blade_rwh::HasRawDisplayHandle for RawWindow {
127 fn raw_display_handle(&self) -> blade_rwh::RawDisplayHandle {
128 blade_rwh::WindowsDisplayHandle::empty().into()
129 }
130 }
131 let raw = RawWindow { hwnd: hwnd.0 as _ };
132 let gpu = Arc::new(
133 unsafe {
134 gpu::Context::init_windowed(
135 &raw,
136 gpu::ContextDesc {
137 validation: false,
138 capture: false,
139 overlay: false,
140 },
141 )
142 }
143 .unwrap(),
144 );
145 let extent = gpu::Extent {
146 width: 1,
147 height: 1,
148 depth: 1,
149 };
150 let renderer = RefCell::new(BladeRenderer::new(gpu, extent));
151 let callbacks = RefCell::new(Callbacks::default());
152 Self {
153 hwnd,
154 origin,
155 size,
156 mouse_position,
157 input_handler,
158 renderer,
159 callbacks,
160 platform_inner,
161 handle,
162 }
163 }
164
165 fn is_virtual_key_pressed(&self, vkey: VIRTUAL_KEY) -> bool {
166 unsafe { GetKeyState(vkey.0 as i32) < 0 }
167 }
168
169 fn current_modifiers(&self) -> Modifiers {
170 Modifiers {
171 control: self.is_virtual_key_pressed(VK_CONTROL),
172 alt: self.is_virtual_key_pressed(VK_MENU),
173 shift: self.is_virtual_key_pressed(VK_SHIFT),
174 command: self.is_virtual_key_pressed(VK_LWIN) || self.is_virtual_key_pressed(VK_RWIN),
175 function: false,
176 }
177 }
178
179 /// mark window client rect to be re-drawn
180 /// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-invalidaterect
181 pub(crate) fn invalidate_client_area(&self) {
182 unsafe { InvalidateRect(self.hwnd, None, FALSE) };
183 }
184
185 /// returns true if message is handled and should not dispatch
186 pub(crate) fn handle_immediate_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> bool {
187 match msg {
188 WM_KEYDOWN | WM_SYSKEYDOWN => self.handle_keydown_msg(wparam).is_handled(),
189 WM_KEYUP | WM_SYSKEYUP => self.handle_keyup_msg(wparam).is_handled(),
190 _ => false,
191 }
192 }
193
194 fn handle_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
195 log::debug!("msg: {msg}, wparam: {}, lparam: {}", wparam.0, lparam.0);
196 match msg {
197 WM_MOVE => self.handle_move_msg(lparam),
198 WM_SIZE => self.handle_size_msg(lparam),
199 WM_PAINT => self.handle_paint_msg(),
200 WM_CLOSE => self.handle_close_msg(msg, wparam, lparam),
201 WM_DESTROY => self.handle_destroy_msg(),
202 WM_MOUSEMOVE => self.handle_mouse_move_msg(lparam, wparam),
203 WM_LBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Left, lparam),
204 WM_RBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Right, lparam),
205 WM_MBUTTONDOWN => self.handle_mouse_down_msg(MouseButton::Middle, lparam),
206 WM_XBUTTONDOWN => {
207 let nav_dir = match wparam.hiword() {
208 XBUTTON1 => Some(NavigationDirection::Forward),
209 XBUTTON2 => Some(NavigationDirection::Back),
210 _ => None,
211 };
212
213 if let Some(nav_dir) = nav_dir {
214 self.handle_mouse_down_msg(MouseButton::Navigate(nav_dir), lparam)
215 } else {
216 LRESULT(1)
217 }
218 }
219 WM_LBUTTONUP => self.handle_mouse_up_msg(MouseButton::Left, lparam),
220 WM_RBUTTONUP => self.handle_mouse_up_msg(MouseButton::Right, lparam),
221 WM_MBUTTONUP => self.handle_mouse_up_msg(MouseButton::Middle, lparam),
222 WM_XBUTTONUP => {
223 let nav_dir = match wparam.hiword() {
224 XBUTTON1 => Some(NavigationDirection::Back),
225 XBUTTON2 => Some(NavigationDirection::Forward),
226 _ => None,
227 };
228
229 if let Some(nav_dir) = nav_dir {
230 self.handle_mouse_up_msg(MouseButton::Navigate(nav_dir), lparam)
231 } else {
232 LRESULT(1)
233 }
234 }
235 WM_MOUSEWHEEL => self.handle_mouse_wheel_msg(wparam, lparam),
236 WM_MOUSEHWHEEL => self.handle_mouse_horizontal_wheel_msg(wparam, lparam),
237 WM_CHAR | WM_SYSCHAR => self.handle_char_msg(wparam),
238 // These events are handled by the immediate handler
239 WM_KEYDOWN | WM_SYSKEYDOWN | WM_KEYUP | WM_SYSKEYUP => LRESULT(0),
240 _ => unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) },
241 }
242 }
243
244 fn handle_move_msg(&self, lparam: LPARAM) -> LRESULT {
245 let x = lparam.signed_loword() as f64;
246 let y = lparam.signed_hiword() as f64;
247 self.origin.set(Point::new(x.into(), y.into()));
248 let mut callbacks = self.callbacks.borrow_mut();
249 if let Some(callback) = callbacks.moved.as_mut() {
250 callback()
251 }
252 LRESULT(0)
253 }
254
255 fn handle_size_msg(&self, lparam: LPARAM) -> LRESULT {
256 let width = lparam.loword().max(1) as f64;
257 let height = lparam.hiword().max(1) as f64;
258 self.renderer
259 .borrow_mut()
260 .update_drawable_size(Size { width, height });
261 let width = width.into();
262 let height = height.into();
263 self.size.set(Size { width, height });
264 let mut callbacks = self.callbacks.borrow_mut();
265 if let Some(callback) = callbacks.resize.as_mut() {
266 callback(
267 Size {
268 width: Pixels(width.0),
269 height: Pixels(height.0),
270 },
271 1.0,
272 );
273 }
274 self.invalidate_client_area();
275 LRESULT(0)
276 }
277
278 fn handle_paint_msg(&self) -> LRESULT {
279 let mut paint_struct = PAINTSTRUCT::default();
280 let hdc = unsafe { BeginPaint(self.hwnd, &mut paint_struct) };
281 let mut callbacks = self.callbacks.borrow_mut();
282 if let Some(request_frame) = callbacks.request_frame.as_mut() {
283 request_frame();
284 }
285 unsafe { EndPaint(self.hwnd, &paint_struct) };
286 LRESULT(0)
287 }
288
289 fn handle_close_msg(&self, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
290 let mut callbacks = self.callbacks.borrow_mut();
291 if let Some(callback) = callbacks.should_close.as_mut() {
292 if callback() {
293 return LRESULT(0);
294 }
295 }
296 drop(callbacks);
297 unsafe { DefWindowProcW(self.hwnd, msg, wparam, lparam) }
298 }
299
300 fn handle_destroy_msg(&self) -> LRESULT {
301 let mut callbacks = self.callbacks.borrow_mut();
302 if let Some(callback) = callbacks.close.take() {
303 callback()
304 }
305 let mut window_handles = self.platform_inner.window_handle_values.borrow_mut();
306 window_handles.remove(&self.hwnd.0);
307 if window_handles.is_empty() {
308 self.platform_inner
309 .foreground_executor
310 .spawn(async {
311 unsafe { PostQuitMessage(0) };
312 })
313 .detach();
314 }
315 LRESULT(1)
316 }
317
318 fn handle_mouse_move_msg(&self, lparam: LPARAM, wparam: WPARAM) -> LRESULT {
319 let x = Pixels::from(lparam.signed_loword() as f32);
320 let y = Pixels::from(lparam.signed_hiword() as f32);
321 self.mouse_position.set(Point { x, y });
322 let mut callbacks = self.callbacks.borrow_mut();
323 if let Some(callback) = callbacks.input.as_mut() {
324 let pressed_button = match MODIFIERKEYS_FLAGS(wparam.loword() as u32) {
325 flags if flags.contains(MK_LBUTTON) => Some(MouseButton::Left),
326 flags if flags.contains(MK_RBUTTON) => Some(MouseButton::Right),
327 flags if flags.contains(MK_MBUTTON) => Some(MouseButton::Middle),
328 flags if flags.contains(MK_XBUTTON1) => {
329 Some(MouseButton::Navigate(NavigationDirection::Back))
330 }
331 flags if flags.contains(MK_XBUTTON2) => {
332 Some(MouseButton::Navigate(NavigationDirection::Forward))
333 }
334 _ => None,
335 };
336 let event = MouseMoveEvent {
337 position: Point { x, y },
338 pressed_button,
339 modifiers: self.current_modifiers(),
340 };
341 if callback(PlatformInput::MouseMove(event)) {
342 return LRESULT(0);
343 }
344 }
345 LRESULT(1)
346 }
347
348 fn parse_key_msg_keystroke(&self, wparam: WPARAM) -> Option<Keystroke> {
349 let vk_code = wparam.loword();
350
351 // 0-9 https://learn.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
352 if vk_code >= 0x30 && vk_code <= 0x39 {
353 let modifiers = self.current_modifiers();
354
355 if modifiers.shift {
356 return None;
357 }
358
359 let digit_char = (b'0' + ((vk_code - 0x30) as u8)) as char;
360 return Some(Keystroke {
361 modifiers,
362 key: digit_char.to_string(),
363 ime_key: Some(digit_char.to_string()),
364 });
365 }
366
367 // A-Z https://learn.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
368 if vk_code >= 0x41 && vk_code <= 0x5A {
369 let offset = (vk_code - 0x41) as u8;
370 let alpha_char = (b'a' + offset) as char;
371 let alpha_char_upper = (b'A' + offset) as char;
372 let modifiers = self.current_modifiers();
373 return Some(Keystroke {
374 modifiers,
375 key: alpha_char.to_string(),
376 ime_key: Some(if modifiers.shift {
377 alpha_char_upper.to_string()
378 } else {
379 alpha_char.to_string()
380 }),
381 });
382 }
383
384 if vk_code >= VK_F1.0 && vk_code <= VK_F24.0 {
385 let offset = vk_code - VK_F1.0;
386 return Some(Keystroke {
387 modifiers: self.current_modifiers(),
388 key: format!("f{}", offset + 1),
389 ime_key: None,
390 });
391 }
392
393 let key = match VIRTUAL_KEY(vk_code) {
394 VK_SPACE => Some(("space", Some(" "))),
395 VK_TAB => Some(("tab", Some("\t"))),
396 VK_BACK => Some(("backspace", None)),
397 VK_RETURN => Some(("enter", None)),
398 VK_UP => Some(("up", None)),
399 VK_DOWN => Some(("down", None)),
400 VK_RIGHT => Some(("right", None)),
401 VK_LEFT => Some(("left", None)),
402 VK_HOME => Some(("home", None)),
403 VK_END => Some(("end", None)),
404 VK_PRIOR => Some(("pageup", None)),
405 VK_NEXT => Some(("pagedown", None)),
406 VK_ESCAPE => Some(("escape", None)),
407 VK_INSERT => Some(("insert", None)),
408 _ => None,
409 };
410
411 if let Some((key, ime_key)) = key {
412 Some(Keystroke {
413 modifiers: self.current_modifiers(),
414 key: key.to_string(),
415 ime_key: ime_key.map(|k| k.to_string()),
416 })
417 } else {
418 None
419 }
420 }
421
422 fn handle_keydown_msg(&self, wparam: WPARAM) -> CallbackResult {
423 let mut callbacks = self.callbacks.borrow_mut();
424 let keystroke = self.parse_key_msg_keystroke(wparam);
425 if let Some(keystroke) = keystroke {
426 if let Some(callback) = callbacks.input.as_mut() {
427 let ime_key = keystroke.ime_key.clone();
428 let event = KeyDownEvent {
429 keystroke,
430 is_held: true,
431 };
432
433 if callback(PlatformInput::KeyDown(event)) {
434 CallbackResult::Handled { by_callback: true }
435 } else if let Some(mut input_handler) = self.input_handler.take() {
436 if let Some(ime_key) = ime_key {
437 input_handler.replace_text_in_range(None, &ime_key);
438 }
439 self.input_handler.set(Some(input_handler));
440 CallbackResult::Handled { by_callback: true }
441 } else {
442 CallbackResult::Handled { by_callback: false }
443 }
444 } else {
445 CallbackResult::Handled { by_callback: false }
446 }
447 } else {
448 CallbackResult::Unhandled
449 }
450 }
451
452 fn handle_keyup_msg(&self, wparam: WPARAM) -> CallbackResult {
453 let mut callbacks = self.callbacks.borrow_mut();
454 let keystroke = self.parse_key_msg_keystroke(wparam);
455 if let Some(keystroke) = keystroke {
456 if let Some(callback) = callbacks.input.as_mut() {
457 let event = KeyUpEvent { keystroke };
458 let by_callback = callback(PlatformInput::KeyUp(event));
459 CallbackResult::Handled { by_callback }
460 } else {
461 CallbackResult::Handled { by_callback: false }
462 }
463 } else {
464 CallbackResult::Unhandled
465 }
466 }
467
468 fn handle_char_msg(&self, wparam: WPARAM) -> LRESULT {
469 let mut callbacks = self.callbacks.borrow_mut();
470 if let Some(callback) = callbacks.input.as_mut() {
471 let modifiers = self.current_modifiers();
472 let msg_char = wparam.0 as u8 as char;
473 let keystroke = Keystroke {
474 modifiers,
475 key: msg_char.to_string(),
476 ime_key: Some(msg_char.to_string()),
477 };
478 let ime_key = keystroke.ime_key.clone();
479 let event = KeyDownEvent {
480 keystroke,
481 is_held: false,
482 };
483
484 if callback(PlatformInput::KeyDown(event)) {
485 return LRESULT(0);
486 }
487
488 if let Some(mut input_handler) = self.input_handler.take() {
489 if let Some(ime_key) = ime_key {
490 input_handler.replace_text_in_range(None, &ime_key);
491 }
492 self.input_handler.set(Some(input_handler));
493 return LRESULT(0);
494 }
495 }
496 return LRESULT(1);
497 }
498
499 fn handle_mouse_down_msg(&self, button: MouseButton, lparam: LPARAM) -> LRESULT {
500 let mut callbacks = self.callbacks.borrow_mut();
501 if let Some(callback) = callbacks.input.as_mut() {
502 let x = Pixels::from(lparam.signed_loword() as f32);
503 let y = Pixels::from(lparam.signed_hiword() as f32);
504 let event = MouseDownEvent {
505 button,
506 position: Point { x, y },
507 modifiers: self.current_modifiers(),
508 click_count: 1,
509 };
510 if callback(PlatformInput::MouseDown(event)) {
511 return LRESULT(0);
512 }
513 }
514 LRESULT(1)
515 }
516
517 fn handle_mouse_up_msg(&self, button: MouseButton, lparam: LPARAM) -> LRESULT {
518 let mut callbacks = self.callbacks.borrow_mut();
519 if let Some(callback) = callbacks.input.as_mut() {
520 let x = Pixels::from(lparam.signed_loword() as f32);
521 let y = Pixels::from(lparam.signed_hiword() as f32);
522 let event = MouseUpEvent {
523 button,
524 position: Point { x, y },
525 modifiers: self.current_modifiers(),
526 click_count: 1,
527 };
528 if callback(PlatformInput::MouseUp(event)) {
529 return LRESULT(0);
530 }
531 }
532 LRESULT(1)
533 }
534
535 fn handle_mouse_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
536 let mut callbacks = self.callbacks.borrow_mut();
537 if let Some(callback) = callbacks.input.as_mut() {
538 let x = Pixels::from(lparam.signed_loword() as f32);
539 let y = Pixels::from(lparam.signed_hiword() as f32);
540 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
541 * self.platform_inner.settings.borrow().wheel_scroll_lines as f32;
542 let event = crate::ScrollWheelEvent {
543 position: Point { x, y },
544 delta: ScrollDelta::Lines(Point {
545 x: 0.0,
546 y: wheel_distance,
547 }),
548 modifiers: self.current_modifiers(),
549 touch_phase: TouchPhase::Moved,
550 };
551 callback(PlatformInput::ScrollWheel(event));
552 return LRESULT(0);
553 }
554 LRESULT(1)
555 }
556
557 fn handle_mouse_horizontal_wheel_msg(&self, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
558 let mut callbacks = self.callbacks.borrow_mut();
559 if let Some(callback) = callbacks.input.as_mut() {
560 let x = Pixels::from(lparam.signed_loword() as f32);
561 let y = Pixels::from(lparam.signed_hiword() as f32);
562 let wheel_distance = (wparam.signed_hiword() as f32 / WHEEL_DELTA as f32)
563 * self.platform_inner.settings.borrow().wheel_scroll_chars as f32;
564 let event = crate::ScrollWheelEvent {
565 position: Point { x, y },
566 delta: ScrollDelta::Lines(Point {
567 x: wheel_distance,
568 y: 0.0,
569 }),
570 modifiers: self.current_modifiers(),
571 touch_phase: TouchPhase::Moved,
572 };
573 if callback(PlatformInput::ScrollWheel(event)) {
574 return LRESULT(0);
575 }
576 }
577 LRESULT(1)
578 }
579
580 fn handle_drag_drop(&self, input: PlatformInput) {
581 let mut callbacks = self.callbacks.borrow_mut();
582 let Some(ref mut func) = callbacks.input else {
583 return;
584 };
585 func(input);
586 }
587}
588
589#[derive(Default)]
590struct Callbacks {
591 request_frame: Option<Box<dyn FnMut()>>,
592 input: Option<Box<dyn FnMut(crate::PlatformInput) -> bool>>,
593 active_status_change: Option<Box<dyn FnMut(bool)>>,
594 resize: Option<Box<dyn FnMut(Size<Pixels>, f32)>>,
595 fullscreen: Option<Box<dyn FnMut(bool)>>,
596 moved: Option<Box<dyn FnMut()>>,
597 should_close: Option<Box<dyn FnMut() -> bool>>,
598 close: Option<Box<dyn FnOnce()>>,
599 appearance_changed: Option<Box<dyn FnMut()>>,
600}
601
602pub(crate) struct WindowsWindow {
603 inner: Rc<WindowsWindowInner>,
604 drag_drop_handler: IDropTarget,
605}
606
607struct WindowCreateContext {
608 inner: Option<Rc<WindowsWindowInner>>,
609 platform_inner: Rc<WindowsPlatformInner>,
610 handle: AnyWindowHandle,
611}
612
613impl WindowsWindow {
614 pub(crate) fn new(
615 platform_inner: Rc<WindowsPlatformInner>,
616 handle: AnyWindowHandle,
617 options: WindowParams,
618 ) -> Self {
619 let dwexstyle = WINDOW_EX_STYLE::default();
620 let classname = register_wnd_class();
621 let windowname = HSTRING::from(
622 options
623 .titlebar
624 .as_ref()
625 .and_then(|titlebar| titlebar.title.as_ref())
626 .map(|title| title.as_ref())
627 .unwrap_or(""),
628 );
629 let dwstyle = WS_OVERLAPPEDWINDOW & !WS_VISIBLE;
630 let x = options.bounds.origin.x.0 as i32;
631 let y = options.bounds.origin.y.0 as i32;
632 let nwidth = options.bounds.size.width.0 as i32;
633 let nheight = options.bounds.size.height.0 as i32;
634 let hwndparent = HWND::default();
635 let hmenu = HMENU::default();
636 let hinstance = HINSTANCE::default();
637 let mut context = WindowCreateContext {
638 inner: None,
639 platform_inner: platform_inner.clone(),
640 handle,
641 };
642 let lpparam = Some(&context as *const _ as *const _);
643 unsafe {
644 CreateWindowExW(
645 dwexstyle,
646 classname,
647 &windowname,
648 dwstyle,
649 x,
650 y,
651 nwidth,
652 nheight,
653 hwndparent,
654 hmenu,
655 hinstance,
656 lpparam,
657 )
658 };
659 let drag_drop_handler = {
660 let inner = context.inner.as_ref().unwrap();
661 let handler = WindowsDragDropHandler(Rc::clone(inner));
662 let drag_drop_handler: IDropTarget = handler.into();
663 unsafe {
664 RegisterDragDrop(inner.hwnd, &drag_drop_handler)
665 .expect("unable to register drag-drop event")
666 };
667 drag_drop_handler
668 };
669 let wnd = Self {
670 inner: context.inner.unwrap(),
671 drag_drop_handler,
672 };
673 platform_inner
674 .window_handle_values
675 .borrow_mut()
676 .insert(wnd.inner.hwnd.0);
677
678 unsafe { ShowWindow(wnd.inner.hwnd, SW_SHOW) };
679 wnd
680 }
681
682 fn maximize(&self) {
683 unsafe { ShowWindow(self.inner.hwnd, SW_MAXIMIZE) };
684 }
685}
686
687impl HasWindowHandle for WindowsWindow {
688 fn window_handle(
689 &self,
690 ) -> Result<raw_window_handle::WindowHandle<'_>, raw_window_handle::HandleError> {
691 let raw = raw_window_handle::Win32WindowHandle::new(unsafe {
692 NonZeroIsize::new_unchecked(self.inner.hwnd.0)
693 })
694 .into();
695 Ok(unsafe { raw_window_handle::WindowHandle::borrow_raw(raw) })
696 }
697}
698
699// todo(windows)
700impl HasDisplayHandle for WindowsWindow {
701 fn display_handle(
702 &self,
703 ) -> Result<raw_window_handle::DisplayHandle<'_>, raw_window_handle::HandleError> {
704 unimplemented!()
705 }
706}
707
708impl Drop for WindowsWindow {
709 fn drop(&mut self) {
710 unsafe {
711 let _ = RevokeDragDrop(self.inner.hwnd);
712 }
713 }
714}
715
716impl PlatformWindow for WindowsWindow {
717 fn bounds(&self) -> Bounds<GlobalPixels> {
718 Bounds {
719 origin: self.inner.origin.get(),
720 size: self.inner.size.get(),
721 }
722 }
723
724 // todo(windows)
725 fn content_size(&self) -> Size<Pixels> {
726 let size = self.inner.size.get();
727 Size {
728 width: size.width.0.into(),
729 height: size.height.0.into(),
730 }
731 }
732
733 // todo(windows)
734 fn scale_factor(&self) -> f32 {
735 1.0
736 }
737
738 // todo(windows)
739 fn titlebar_height(&self) -> Pixels {
740 20.0.into()
741 }
742
743 // todo(windows)
744 fn appearance(&self) -> WindowAppearance {
745 WindowAppearance::Dark
746 }
747
748 // todo(windows)
749 fn display(&self) -> Rc<dyn PlatformDisplay> {
750 Rc::new(WindowsDisplay::new())
751 }
752
753 fn mouse_position(&self) -> Point<Pixels> {
754 self.inner.mouse_position.get()
755 }
756
757 // todo(windows)
758 fn modifiers(&self) -> Modifiers {
759 Modifiers::none()
760 }
761
762 fn as_any_mut(&mut self) -> &mut dyn Any {
763 self
764 }
765
766 // todo(windows)
767 fn set_input_handler(&mut self, input_handler: PlatformInputHandler) {
768 self.inner.input_handler.set(Some(input_handler));
769 }
770
771 // todo(windows)
772 fn take_input_handler(&mut self) -> Option<PlatformInputHandler> {
773 self.inner.input_handler.take()
774 }
775
776 fn prompt(
777 &self,
778 level: PromptLevel,
779 msg: &str,
780 detail: Option<&str>,
781 answers: &[&str],
782 ) -> Option<Receiver<usize>> {
783 let (done_tx, done_rx) = oneshot::channel();
784 let msg = msg.to_string();
785 let detail_string = match detail {
786 Some(info) => Some(info.to_string()),
787 None => None,
788 };
789 let answers = answers.iter().map(|s| s.to_string()).collect::<Vec<_>>();
790 let handle = self.inner.hwnd;
791 self.inner
792 .platform_inner
793 .foreground_executor
794 .spawn(async move {
795 unsafe {
796 let mut config;
797 config = std::mem::zeroed::<TASKDIALOGCONFIG>();
798 config.cbSize = std::mem::size_of::<TASKDIALOGCONFIG>() as _;
799 config.hwndParent = handle;
800 let title;
801 let main_icon;
802 match level {
803 crate::PromptLevel::Info => {
804 title = windows::core::w!("Info");
805 main_icon = TD_INFORMATION_ICON;
806 }
807 crate::PromptLevel::Warning => {
808 title = windows::core::w!("Warning");
809 main_icon = TD_WARNING_ICON;
810 }
811 crate::PromptLevel::Critical => {
812 title = windows::core::w!("Critical");
813 main_icon = TD_ERROR_ICON;
814 }
815 };
816 config.pszWindowTitle = title;
817 config.Anonymous1.pszMainIcon = main_icon;
818 let instruction = msg.encode_utf16().chain(once(0)).collect_vec();
819 config.pszMainInstruction = PCWSTR::from_raw(instruction.as_ptr());
820 let hints_encoded;
821 if let Some(ref hints) = detail_string {
822 hints_encoded = hints.encode_utf16().chain(once(0)).collect_vec();
823 config.pszContent = PCWSTR::from_raw(hints_encoded.as_ptr());
824 };
825 let mut buttons = Vec::new();
826 let mut btn_encoded = Vec::new();
827 for (index, btn_string) in answers.iter().enumerate() {
828 let encoded = btn_string.encode_utf16().chain(once(0)).collect_vec();
829 buttons.push(TASKDIALOG_BUTTON {
830 nButtonID: index as _,
831 pszButtonText: PCWSTR::from_raw(encoded.as_ptr()),
832 });
833 btn_encoded.push(encoded);
834 }
835 config.cButtons = buttons.len() as _;
836 config.pButtons = buttons.as_ptr();
837
838 config.pfCallback = None;
839 let mut res = std::mem::zeroed();
840 let _ = TaskDialogIndirect(&config, Some(&mut res), None, None)
841 .inspect_err(|e| log::error!("unable to create task dialog: {}", e));
842
843 let _ = done_tx.send(res as usize);
844 }
845 })
846 .detach();
847
848 Some(done_rx)
849 }
850
851 // todo(windows)
852 fn activate(&self) {}
853
854 // todo(windows)
855 fn set_title(&mut self, title: &str) {
856 unsafe { SetWindowTextW(self.inner.hwnd, &HSTRING::from(title)) }
857 .inspect_err(|e| log::error!("Set title failed: {e}"))
858 .ok();
859 }
860
861 // todo(windows)
862 fn set_edited(&mut self, edited: bool) {}
863
864 // todo(windows)
865 fn show_character_palette(&self) {}
866
867 // todo(windows)
868 fn minimize(&self) {}
869
870 // todo(windows)
871 fn zoom(&self) {}
872
873 // todo(windows)
874 fn toggle_full_screen(&self) {}
875
876 // todo(windows)
877 fn is_full_screen(&self) -> bool {
878 false
879 }
880
881 // todo(windows)
882 fn on_request_frame(&self, callback: Box<dyn FnMut()>) {
883 self.inner.callbacks.borrow_mut().request_frame = Some(callback);
884 }
885
886 // todo(windows)
887 fn on_input(&self, callback: Box<dyn FnMut(PlatformInput) -> bool>) {
888 self.inner.callbacks.borrow_mut().input = Some(callback);
889 }
890
891 // todo(windows)
892 fn on_active_status_change(&self, callback: Box<dyn FnMut(bool)>) {
893 self.inner.callbacks.borrow_mut().active_status_change = Some(callback);
894 }
895
896 // todo(windows)
897 fn on_resize(&self, callback: Box<dyn FnMut(Size<Pixels>, f32)>) {
898 self.inner.callbacks.borrow_mut().resize = Some(callback);
899 }
900
901 // todo(windows)
902 fn on_fullscreen(&self, callback: Box<dyn FnMut(bool)>) {
903 self.inner.callbacks.borrow_mut().fullscreen = Some(callback);
904 }
905
906 // todo(windows)
907 fn on_moved(&self, callback: Box<dyn FnMut()>) {
908 self.inner.callbacks.borrow_mut().moved = Some(callback);
909 }
910
911 // todo(windows)
912 fn on_should_close(&self, callback: Box<dyn FnMut() -> bool>) {
913 self.inner.callbacks.borrow_mut().should_close = Some(callback);
914 }
915
916 // todo(windows)
917 fn on_close(&self, callback: Box<dyn FnOnce()>) {
918 self.inner.callbacks.borrow_mut().close = Some(callback);
919 }
920
921 // todo(windows)
922 fn on_appearance_changed(&self, callback: Box<dyn FnMut()>) {
923 self.inner.callbacks.borrow_mut().appearance_changed = Some(callback);
924 }
925
926 // todo(windows)
927 fn is_topmost_for_position(&self, position: Point<Pixels>) -> bool {
928 true
929 }
930
931 // todo(windows)
932 fn draw(&self, scene: &Scene) {
933 self.inner.renderer.borrow_mut().draw(scene)
934 }
935
936 // todo(windows)
937 fn sprite_atlas(&self) -> Arc<dyn PlatformAtlas> {
938 self.inner.renderer.borrow().sprite_atlas().clone()
939 }
940}
941
942#[implement(IDropTarget)]
943struct WindowsDragDropHandler(pub Rc<WindowsWindowInner>);
944
945impl IDropTarget_Impl for WindowsDragDropHandler {
946 fn DragEnter(
947 &self,
948 pdataobj: Option<&IDataObject>,
949 _grfkeystate: MODIFIERKEYS_FLAGS,
950 pt: &POINTL,
951 pdweffect: *mut DROPEFFECT,
952 ) -> windows::core::Result<()> {
953 unsafe {
954 let Some(idata_obj) = pdataobj else {
955 log::info!("no dragging file or directory detected");
956 return Ok(());
957 };
958 let config = FORMATETC {
959 cfFormat: CF_HDROP.0,
960 ptd: std::ptr::null_mut() as _,
961 dwAspect: DVASPECT_CONTENT.0,
962 lindex: -1,
963 tymed: TYMED_HGLOBAL.0 as _,
964 };
965 let mut paths = SmallVec::<[PathBuf; 2]>::new();
966 if idata_obj.QueryGetData(&config as _) == S_OK {
967 *pdweffect = DROPEFFECT_LINK;
968 let Ok(mut idata) = idata_obj.GetData(&config as _) else {
969 return Ok(());
970 };
971 if idata.u.hGlobal.is_invalid() {
972 return Ok(());
973 }
974 let hdrop = idata.u.hGlobal.0 as *mut HDROP;
975 let file_count = DragQueryFileW(*hdrop, DRAGDROP_GET_FILES_COUNT, None);
976 for file_index in 0..file_count {
977 let filename_length = DragQueryFileW(*hdrop, file_index, None) as usize;
978 let mut buffer = vec![0u16; filename_length + 1];
979 let ret = DragQueryFileW(*hdrop, file_index, Some(buffer.as_mut_slice()));
980 if ret == 0 {
981 log::error!("unable to read file name");
982 continue;
983 }
984 if let Ok(file_name) = String::from_utf16(&buffer[0..filename_length]) {
985 if let Ok(path) = PathBuf::from_str(&file_name) {
986 paths.push(path);
987 }
988 }
989 }
990 ReleaseStgMedium(&mut idata);
991 let input = PlatformInput::FileDrop(crate::FileDropEvent::Entered {
992 position: Point {
993 x: Pixels(pt.x as _),
994 y: Pixels(pt.y as _),
995 },
996 paths: crate::ExternalPaths(paths),
997 });
998 self.0.handle_drag_drop(input);
999 } else {
1000 *pdweffect = DROPEFFECT_NONE;
1001 }
1002 }
1003 Ok(())
1004 }
1005
1006 fn DragOver(
1007 &self,
1008 _grfkeystate: MODIFIERKEYS_FLAGS,
1009 pt: &POINTL,
1010 _pdweffect: *mut DROPEFFECT,
1011 ) -> windows::core::Result<()> {
1012 let input = PlatformInput::FileDrop(crate::FileDropEvent::Pending {
1013 position: Point {
1014 x: Pixels(pt.x as _),
1015 y: Pixels(pt.y as _),
1016 },
1017 });
1018 self.0.handle_drag_drop(input);
1019
1020 Ok(())
1021 }
1022
1023 fn DragLeave(&self) -> windows::core::Result<()> {
1024 let input = PlatformInput::FileDrop(crate::FileDropEvent::Exited);
1025 self.0.handle_drag_drop(input);
1026
1027 Ok(())
1028 }
1029
1030 fn Drop(
1031 &self,
1032 _pdataobj: Option<&IDataObject>,
1033 _grfkeystate: MODIFIERKEYS_FLAGS,
1034 pt: &POINTL,
1035 _pdweffect: *mut DROPEFFECT,
1036 ) -> windows::core::Result<()> {
1037 let input = PlatformInput::FileDrop(crate::FileDropEvent::Submit {
1038 position: Point {
1039 x: Pixels(pt.x as _),
1040 y: Pixels(pt.y as _),
1041 },
1042 });
1043 self.0.handle_drag_drop(input);
1044
1045 Ok(())
1046 }
1047}
1048
1049fn register_wnd_class() -> PCWSTR {
1050 const CLASS_NAME: PCWSTR = w!("Zed::Window");
1051
1052 static ONCE: Once = Once::new();
1053 ONCE.call_once(|| {
1054 let wc = WNDCLASSW {
1055 lpfnWndProc: Some(wnd_proc),
1056 hCursor: unsafe { LoadCursorW(None, IDC_ARROW).ok().unwrap() },
1057 lpszClassName: PCWSTR(CLASS_NAME.as_ptr()),
1058 ..Default::default()
1059 };
1060 unsafe { RegisterClassW(&wc) };
1061 });
1062
1063 CLASS_NAME
1064}
1065
1066unsafe extern "system" fn wnd_proc(
1067 hwnd: HWND,
1068 msg: u32,
1069 wparam: WPARAM,
1070 lparam: LPARAM,
1071) -> LRESULT {
1072 if msg == WM_NCCREATE {
1073 let cs = lparam.0 as *const CREATESTRUCTW;
1074 let cs = unsafe { &*cs };
1075 let ctx = cs.lpCreateParams as *mut WindowCreateContext;
1076 let ctx = unsafe { &mut *ctx };
1077 let inner = Rc::new(WindowsWindowInner::new(
1078 hwnd,
1079 cs,
1080 ctx.platform_inner.clone(),
1081 ctx.handle,
1082 ));
1083 let weak = Box::new(Rc::downgrade(&inner));
1084 unsafe { set_window_long(hwnd, GWLP_USERDATA, Box::into_raw(weak) as isize) };
1085 ctx.inner = Some(inner);
1086 return LRESULT(1);
1087 }
1088 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1089 if ptr.is_null() {
1090 return unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) };
1091 }
1092 let inner = unsafe { &*ptr };
1093 let r = if let Some(inner) = inner.upgrade() {
1094 inner.handle_msg(msg, wparam, lparam)
1095 } else {
1096 unsafe { DefWindowProcW(hwnd, msg, wparam, lparam) }
1097 };
1098 if msg == WM_NCDESTROY {
1099 unsafe { set_window_long(hwnd, GWLP_USERDATA, 0) };
1100 unsafe { std::mem::drop(Box::from_raw(ptr)) };
1101 }
1102 r
1103}
1104
1105pub(crate) fn try_get_window_inner(hwnd: HWND) -> Option<Rc<WindowsWindowInner>> {
1106 let ptr = unsafe { get_window_long(hwnd, GWLP_USERDATA) } as *mut Weak<WindowsWindowInner>;
1107 if !ptr.is_null() {
1108 let inner = unsafe { &*ptr };
1109 inner.upgrade()
1110 } else {
1111 None
1112 }
1113}
1114
1115unsafe fn get_window_long(hwnd: HWND, nindex: WINDOW_LONG_PTR_INDEX) -> isize {
1116 #[cfg(target_pointer_width = "64")]
1117 unsafe {
1118 GetWindowLongPtrW(hwnd, nindex)
1119 }
1120 #[cfg(target_pointer_width = "32")]
1121 unsafe {
1122 GetWindowLongW(hwnd, nindex) as isize
1123 }
1124}
1125
1126unsafe fn set_window_long(hwnd: HWND, nindex: WINDOW_LONG_PTR_INDEX, dwnewlong: isize) -> isize {
1127 #[cfg(target_pointer_width = "64")]
1128 unsafe {
1129 SetWindowLongPtrW(hwnd, nindex, dwnewlong)
1130 }
1131 #[cfg(target_pointer_width = "32")]
1132 unsafe {
1133 SetWindowLongW(hwnd, nindex, dwnewlong as i32) as isize
1134 }
1135}
1136
1137// https://learn.microsoft.com/en-us/windows/win32/api/shellapi/nf-shellapi-dragqueryfilew
1138const DRAGDROP_GET_FILES_COUNT: u32 = 0xFFFFFFFF;