1use std::{
2 cell::RefCell,
3 mem::ManuallyDrop,
4 path::{Path, PathBuf},
5 rc::Rc,
6 sync::Arc,
7};
8
9use ::util::ResultExt;
10use anyhow::{anyhow, Context, Result};
11use futures::channel::oneshot::{self, Receiver};
12use itertools::Itertools;
13use parking_lot::RwLock;
14use smallvec::SmallVec;
15use windows::{
16 core::*,
17 Win32::{
18 Foundation::*,
19 Globalization::u_memcpy,
20 Graphics::{
21 Gdi::*,
22 Imaging::{CLSID_WICImagingFactory, IWICImagingFactory},
23 },
24 Security::Credentials::*,
25 System::{
26 Com::*,
27 DataExchange::{
28 CloseClipboard, EmptyClipboard, GetClipboardData, OpenClipboard,
29 RegisterClipboardFormatW, SetClipboardData,
30 },
31 LibraryLoader::*,
32 Memory::{GlobalAlloc, GlobalLock, GlobalUnlock, GMEM_MOVEABLE},
33 Ole::*,
34 SystemInformation::*,
35 Threading::*,
36 },
37 UI::{Input::KeyboardAndMouse::*, Shell::*, WindowsAndMessaging::*},
38 },
39 UI::ViewManagement::UISettings,
40};
41
42use crate::*;
43
44pub(crate) struct WindowsPlatform {
45 state: RefCell<WindowsPlatformState>,
46 raw_window_handles: RwLock<SmallVec<[HWND; 4]>>,
47 // The below members will never change throughout the entire lifecycle of the app.
48 icon: HICON,
49 background_executor: BackgroundExecutor,
50 foreground_executor: ForegroundExecutor,
51 text_system: Arc<DirectWriteTextSystem>,
52 clipboard_hash_format: u32,
53 clipboard_metadata_format: u32,
54 windows_version: WindowsVersion,
55 bitmap_factory: ManuallyDrop<IWICImagingFactory>,
56 validation_number: usize,
57}
58
59pub(crate) struct WindowsPlatformState {
60 callbacks: PlatformCallbacks,
61 // NOTE: standard cursor handles don't need to close.
62 pub(crate) current_cursor: HCURSOR,
63}
64
65#[derive(Default)]
66struct PlatformCallbacks {
67 open_urls: Option<Box<dyn FnMut(Vec<String>)>>,
68 quit: Option<Box<dyn FnMut()>>,
69 reopen: Option<Box<dyn FnMut()>>,
70 app_menu_action: Option<Box<dyn FnMut(&dyn Action)>>,
71 will_open_app_menu: Option<Box<dyn FnMut()>>,
72 validate_app_menu_command: Option<Box<dyn FnMut(&dyn Action) -> bool>>,
73}
74
75impl WindowsPlatformState {
76 fn new() -> Self {
77 let callbacks = PlatformCallbacks::default();
78 let current_cursor = load_cursor(CursorStyle::Arrow);
79
80 Self {
81 callbacks,
82 current_cursor,
83 }
84 }
85}
86
87impl WindowsPlatform {
88 pub(crate) fn new() -> Self {
89 unsafe {
90 OleInitialize(None).expect("unable to initialize Windows OLE");
91 }
92 let dispatcher = Arc::new(WindowsDispatcher::new());
93 let background_executor = BackgroundExecutor::new(dispatcher.clone());
94 let foreground_executor = ForegroundExecutor::new(dispatcher);
95 let bitmap_factory = ManuallyDrop::new(unsafe {
96 CoCreateInstance(&CLSID_WICImagingFactory, None, CLSCTX_INPROC_SERVER)
97 .expect("Error creating bitmap factory.")
98 });
99 let text_system = Arc::new(
100 DirectWriteTextSystem::new(&bitmap_factory)
101 .expect("Error creating DirectWriteTextSystem"),
102 );
103 let icon = load_icon().unwrap_or_default();
104 let state = RefCell::new(WindowsPlatformState::new());
105 let raw_window_handles = RwLock::new(SmallVec::new());
106 let clipboard_hash_format = register_clipboard_format(CLIPBOARD_HASH_FORMAT).unwrap();
107 let clipboard_metadata_format =
108 register_clipboard_format(CLIPBOARD_METADATA_FORMAT).unwrap();
109 let windows_version = WindowsVersion::new().expect("Error retrieve windows version");
110 let validation_number = rand::random::<usize>();
111
112 Self {
113 state,
114 raw_window_handles,
115 icon,
116 background_executor,
117 foreground_executor,
118 text_system,
119 clipboard_hash_format,
120 clipboard_metadata_format,
121 windows_version,
122 bitmap_factory,
123 validation_number,
124 }
125 }
126
127 fn redraw_all(&self) {
128 for handle in self.raw_window_handles.read().iter() {
129 unsafe {
130 RedrawWindow(
131 *handle,
132 None,
133 HRGN::default(),
134 RDW_INVALIDATE | RDW_UPDATENOW,
135 )
136 .ok()
137 .log_err();
138 }
139 }
140 }
141
142 pub fn try_get_windows_inner_from_hwnd(&self, hwnd: HWND) -> Option<Rc<WindowsWindowStatePtr>> {
143 self.raw_window_handles
144 .read()
145 .iter()
146 .find(|entry| *entry == &hwnd)
147 .and_then(|hwnd| try_get_window_inner(*hwnd))
148 }
149
150 #[inline]
151 fn post_message(&self, message: u32, wparam: WPARAM, lparam: LPARAM) {
152 self.raw_window_handles
153 .read()
154 .iter()
155 .for_each(|handle| unsafe {
156 PostMessageW(*handle, message, wparam, lparam).log_err();
157 });
158 }
159
160 fn close_one_window(
161 &self,
162 target_window: HWND,
163 validation_number: usize,
164 msg: *const MSG,
165 ) -> bool {
166 if validation_number != self.validation_number {
167 unsafe { DispatchMessageW(msg) };
168 return false;
169 }
170 let mut lock = self.raw_window_handles.write();
171 let index = lock
172 .iter()
173 .position(|handle| *handle == target_window)
174 .unwrap();
175 lock.remove(index);
176
177 lock.is_empty()
178 }
179}
180
181impl Platform for WindowsPlatform {
182 fn background_executor(&self) -> BackgroundExecutor {
183 self.background_executor.clone()
184 }
185
186 fn foreground_executor(&self) -> ForegroundExecutor {
187 self.foreground_executor.clone()
188 }
189
190 fn text_system(&self) -> Arc<dyn PlatformTextSystem> {
191 self.text_system.clone()
192 }
193
194 fn run(&self, on_finish_launching: Box<dyn 'static + FnOnce()>) {
195 on_finish_launching();
196 let vsync_event = unsafe { Owned::new(CreateEventW(None, false, false, None).unwrap()) };
197 begin_vsync(*vsync_event);
198 'a: loop {
199 let wait_result = unsafe {
200 MsgWaitForMultipleObjects(Some(&[*vsync_event]), false, INFINITE, QS_ALLINPUT)
201 };
202
203 match wait_result {
204 // compositor clock ticked so we should draw a frame
205 WAIT_EVENT(0) => {
206 self.redraw_all();
207 }
208 // Windows thread messages are posted
209 WAIT_EVENT(1) => {
210 let mut msg = MSG::default();
211 unsafe {
212 while PeekMessageW(&mut msg, None, 0, 0, PM_REMOVE).as_bool() {
213 match msg.message {
214 WM_QUIT => break 'a,
215 CLOSE_ONE_WINDOW => {
216 if self.close_one_window(
217 HWND(msg.lParam.0 as _),
218 msg.wParam.0,
219 &msg,
220 ) {
221 break 'a;
222 }
223 }
224 _ => {
225 // todo(windows)
226 // crate `windows 0.56` reports true as Err
227 TranslateMessage(&msg).as_bool();
228 DispatchMessageW(&msg);
229 }
230 }
231 }
232 }
233 }
234 _ => {
235 log::error!("Something went wrong while waiting {:?}", wait_result);
236 break;
237 }
238 }
239 }
240
241 if let Some(ref mut callback) = self.state.borrow_mut().callbacks.quit {
242 callback();
243 }
244 }
245
246 fn quit(&self) {
247 self.foreground_executor()
248 .spawn(async { unsafe { PostQuitMessage(0) } })
249 .detach();
250 }
251
252 fn restart(&self, _: Option<PathBuf>) {
253 let pid = std::process::id();
254 let Some(app_path) = self.app_path().log_err() else {
255 return;
256 };
257 let script = format!(
258 r#"
259 $pidToWaitFor = {}
260 $exePath = "{}"
261
262 while ($true) {{
263 $process = Get-Process -Id $pidToWaitFor -ErrorAction SilentlyContinue
264 if (-not $process) {{
265 Start-Process -FilePath $exePath
266 break
267 }}
268 Start-Sleep -Seconds 0.1
269 }}
270 "#,
271 pid,
272 app_path.display(),
273 );
274 let restart_process = std::process::Command::new("powershell.exe")
275 .arg("-command")
276 .arg(script)
277 .spawn();
278
279 match restart_process {
280 Ok(_) => self.quit(),
281 Err(e) => log::error!("failed to spawn restart script: {:?}", e),
282 }
283 }
284
285 // todo(windows)
286 fn activate(&self, _ignoring_other_apps: bool) {}
287
288 // todo(windows)
289 fn hide(&self) {
290 unimplemented!()
291 }
292
293 // todo(windows)
294 fn hide_other_apps(&self) {
295 unimplemented!()
296 }
297
298 // todo(windows)
299 fn unhide_other_apps(&self) {
300 unimplemented!()
301 }
302
303 fn displays(&self) -> Vec<Rc<dyn PlatformDisplay>> {
304 WindowsDisplay::displays()
305 }
306
307 fn primary_display(&self) -> Option<Rc<dyn PlatformDisplay>> {
308 WindowsDisplay::primary_monitor().map(|display| Rc::new(display) as Rc<dyn PlatformDisplay>)
309 }
310
311 fn active_window(&self) -> Option<AnyWindowHandle> {
312 let active_window_hwnd = unsafe { GetActiveWindow() };
313 self.try_get_windows_inner_from_hwnd(active_window_hwnd)
314 .map(|inner| inner.handle)
315 }
316
317 fn open_window(
318 &self,
319 handle: AnyWindowHandle,
320 options: WindowParams,
321 ) -> Result<Box<dyn PlatformWindow>> {
322 let lock = self.state.borrow();
323 let window = WindowsWindow::new(
324 handle,
325 options,
326 self.icon,
327 self.foreground_executor.clone(),
328 lock.current_cursor,
329 self.windows_version,
330 self.validation_number,
331 )?;
332 drop(lock);
333 let handle = window.get_raw_handle();
334 self.raw_window_handles.write().push(handle);
335
336 Ok(Box::new(window))
337 }
338
339 fn window_appearance(&self) -> WindowAppearance {
340 system_appearance().log_err().unwrap_or_default()
341 }
342
343 fn open_url(&self, url: &str) {
344 let url_string = url.to_string();
345 self.background_executor()
346 .spawn(async move {
347 if url_string.is_empty() {
348 return;
349 }
350 open_target(url_string.as_str());
351 })
352 .detach();
353 }
354
355 fn on_open_urls(&self, callback: Box<dyn FnMut(Vec<String>)>) {
356 self.state.borrow_mut().callbacks.open_urls = Some(callback);
357 }
358
359 fn prompt_for_paths(
360 &self,
361 options: PathPromptOptions,
362 ) -> Receiver<Result<Option<Vec<PathBuf>>>> {
363 let (tx, rx) = oneshot::channel();
364 self.foreground_executor()
365 .spawn(async move {
366 let _ = tx.send(file_open_dialog(options));
367 })
368 .detach();
369
370 rx
371 }
372
373 fn prompt_for_new_path(&self, directory: &Path) -> Receiver<Result<Option<PathBuf>>> {
374 let directory = directory.to_owned();
375 let (tx, rx) = oneshot::channel();
376 self.foreground_executor()
377 .spawn(async move {
378 let _ = tx.send(file_save_dialog(directory));
379 })
380 .detach();
381
382 rx
383 }
384
385 fn reveal_path(&self, path: &Path) {
386 let Ok(file_full_path) = path.canonicalize() else {
387 log::error!("unable to parse file path");
388 return;
389 };
390 self.background_executor()
391 .spawn(async move {
392 let Some(path) = file_full_path.to_str() else {
393 return;
394 };
395 if path.is_empty() {
396 return;
397 }
398 open_target_in_explorer(path);
399 })
400 .detach();
401 }
402
403 fn on_quit(&self, callback: Box<dyn FnMut()>) {
404 self.state.borrow_mut().callbacks.quit = Some(callback);
405 }
406
407 fn on_reopen(&self, callback: Box<dyn FnMut()>) {
408 self.state.borrow_mut().callbacks.reopen = Some(callback);
409 }
410
411 // todo(windows)
412 fn set_menus(&self, _menus: Vec<Menu>, _keymap: &Keymap) {}
413 fn set_dock_menu(&self, _menus: Vec<MenuItem>, _keymap: &Keymap) {}
414
415 fn on_app_menu_action(&self, callback: Box<dyn FnMut(&dyn Action)>) {
416 self.state.borrow_mut().callbacks.app_menu_action = Some(callback);
417 }
418
419 fn on_will_open_app_menu(&self, callback: Box<dyn FnMut()>) {
420 self.state.borrow_mut().callbacks.will_open_app_menu = Some(callback);
421 }
422
423 fn on_validate_app_menu_command(&self, callback: Box<dyn FnMut(&dyn Action) -> bool>) {
424 self.state.borrow_mut().callbacks.validate_app_menu_command = Some(callback);
425 }
426
427 fn app_path(&self) -> Result<PathBuf> {
428 Ok(std::env::current_exe()?)
429 }
430
431 // todo(windows)
432 fn path_for_auxiliary_executable(&self, _name: &str) -> Result<PathBuf> {
433 Err(anyhow!("not yet implemented"))
434 }
435
436 fn set_cursor_style(&self, style: CursorStyle) {
437 let hcursor = load_cursor(style);
438 let mut lock = self.state.borrow_mut();
439 if lock.current_cursor.0 != hcursor.0 {
440 self.post_message(CURSOR_STYLE_CHANGED, WPARAM(0), LPARAM(hcursor.0 as isize));
441 lock.current_cursor = hcursor;
442 }
443 }
444
445 fn should_auto_hide_scrollbars(&self) -> bool {
446 should_auto_hide_scrollbars().log_err().unwrap_or(false)
447 }
448
449 fn write_to_clipboard(&self, item: ClipboardItem) {
450 write_to_clipboard(
451 item,
452 self.clipboard_hash_format,
453 self.clipboard_metadata_format,
454 );
455 }
456
457 fn read_from_clipboard(&self) -> Option<ClipboardItem> {
458 read_from_clipboard(self.clipboard_hash_format, self.clipboard_metadata_format)
459 }
460
461 fn write_credentials(&self, url: &str, username: &str, password: &[u8]) -> Task<Result<()>> {
462 let mut password = password.to_vec();
463 let mut username = username.encode_utf16().chain(Some(0)).collect_vec();
464 let mut target_name = windows_credentials_target_name(url)
465 .encode_utf16()
466 .chain(Some(0))
467 .collect_vec();
468 self.foreground_executor().spawn(async move {
469 let credentials = CREDENTIALW {
470 LastWritten: unsafe { GetSystemTimeAsFileTime() },
471 Flags: CRED_FLAGS(0),
472 Type: CRED_TYPE_GENERIC,
473 TargetName: PWSTR::from_raw(target_name.as_mut_ptr()),
474 CredentialBlobSize: password.len() as u32,
475 CredentialBlob: password.as_ptr() as *mut _,
476 Persist: CRED_PERSIST_LOCAL_MACHINE,
477 UserName: PWSTR::from_raw(username.as_mut_ptr()),
478 ..CREDENTIALW::default()
479 };
480 unsafe { CredWriteW(&credentials, 0) }?;
481 Ok(())
482 })
483 }
484
485 fn read_credentials(&self, url: &str) -> Task<Result<Option<(String, Vec<u8>)>>> {
486 let mut target_name = windows_credentials_target_name(url)
487 .encode_utf16()
488 .chain(Some(0))
489 .collect_vec();
490 self.foreground_executor().spawn(async move {
491 let mut credentials: *mut CREDENTIALW = std::ptr::null_mut();
492 unsafe {
493 CredReadW(
494 PCWSTR::from_raw(target_name.as_ptr()),
495 CRED_TYPE_GENERIC,
496 0,
497 &mut credentials,
498 )?
499 };
500
501 if credentials.is_null() {
502 Ok(None)
503 } else {
504 let username: String = unsafe { (*credentials).UserName.to_string()? };
505 let credential_blob = unsafe {
506 std::slice::from_raw_parts(
507 (*credentials).CredentialBlob,
508 (*credentials).CredentialBlobSize as usize,
509 )
510 };
511 let password = credential_blob.to_vec();
512 unsafe { CredFree(credentials as *const _ as _) };
513 Ok(Some((username, password)))
514 }
515 })
516 }
517
518 fn delete_credentials(&self, url: &str) -> Task<Result<()>> {
519 let mut target_name = windows_credentials_target_name(url)
520 .encode_utf16()
521 .chain(Some(0))
522 .collect_vec();
523 self.foreground_executor().spawn(async move {
524 unsafe { CredDeleteW(PCWSTR::from_raw(target_name.as_ptr()), CRED_TYPE_GENERIC, 0)? };
525 Ok(())
526 })
527 }
528
529 fn register_url_scheme(&self, _: &str) -> Task<anyhow::Result<()>> {
530 Task::ready(Err(anyhow!("register_url_scheme unimplemented")))
531 }
532}
533
534impl Drop for WindowsPlatform {
535 fn drop(&mut self) {
536 unsafe {
537 ManuallyDrop::drop(&mut self.bitmap_factory);
538 OleUninitialize();
539 }
540 }
541}
542
543fn open_target(target: &str) {
544 unsafe {
545 let ret = ShellExecuteW(
546 None,
547 windows::core::w!("open"),
548 &HSTRING::from(target),
549 None,
550 None,
551 SW_SHOWDEFAULT,
552 );
553 if ret.0 as isize <= 32 {
554 log::error!("Unable to open target: {}", std::io::Error::last_os_error());
555 }
556 }
557}
558
559fn open_target_in_explorer(target: &str) {
560 unsafe {
561 let ret = ShellExecuteW(
562 None,
563 windows::core::w!("open"),
564 windows::core::w!("explorer.exe"),
565 &HSTRING::from(format!("/select,{}", target).as_str()),
566 None,
567 SW_SHOWDEFAULT,
568 );
569 if ret.0 as isize <= 32 {
570 log::error!(
571 "Unable to open target in explorer: {}",
572 std::io::Error::last_os_error()
573 );
574 }
575 }
576}
577
578fn file_open_dialog(options: PathPromptOptions) -> Result<Option<Vec<PathBuf>>> {
579 let folder_dialog: IFileOpenDialog =
580 unsafe { CoCreateInstance(&FileOpenDialog, None, CLSCTX_ALL)? };
581
582 let mut dialog_options = FOS_FILEMUSTEXIST;
583 if options.multiple {
584 dialog_options |= FOS_ALLOWMULTISELECT;
585 }
586 if options.directories {
587 dialog_options |= FOS_PICKFOLDERS;
588 }
589
590 unsafe {
591 folder_dialog.SetOptions(dialog_options)?;
592 if folder_dialog.Show(None).is_err() {
593 // User cancelled
594 return Ok(None);
595 }
596 }
597
598 let results = unsafe { folder_dialog.GetResults()? };
599 let file_count = unsafe { results.GetCount()? };
600 if file_count == 0 {
601 return Ok(None);
602 }
603
604 let mut paths = Vec::new();
605 for i in 0..file_count {
606 let item = unsafe { results.GetItemAt(i)? };
607 let path = unsafe { item.GetDisplayName(SIGDN_FILESYSPATH)?.to_string()? };
608 paths.push(PathBuf::from(path));
609 }
610
611 Ok(Some(paths))
612}
613
614fn file_save_dialog(directory: PathBuf) -> Result<Option<PathBuf>> {
615 let dialog: IFileSaveDialog = unsafe { CoCreateInstance(&FileSaveDialog, None, CLSCTX_ALL)? };
616 if let Some(full_path) = directory.canonicalize().log_err() {
617 let full_path = full_path.to_string_lossy().to_string();
618 if !full_path.is_empty() {
619 let path_item: IShellItem =
620 unsafe { SHCreateItemFromParsingName(&HSTRING::from(&full_path), None)? };
621 unsafe { dialog.SetFolder(&path_item).log_err() };
622 }
623 }
624 unsafe {
625 if dialog.Show(None).is_err() {
626 // User cancelled
627 return Ok(None);
628 }
629 }
630 let shell_item = unsafe { dialog.GetResult()? };
631 let file_path_string = unsafe { shell_item.GetDisplayName(SIGDN_FILESYSPATH)?.to_string()? };
632 Ok(Some(PathBuf::from(file_path_string)))
633}
634
635fn begin_vsync(vsync_event: HANDLE) {
636 let event: SafeHandle = vsync_event.into();
637 std::thread::spawn(move || unsafe {
638 loop {
639 windows::Win32::Graphics::Dwm::DwmFlush().log_err();
640 SetEvent(*event).log_err();
641 }
642 });
643}
644
645fn load_icon() -> Result<HICON> {
646 let module = unsafe { GetModuleHandleW(None).context("unable to get module handle")? };
647 let handle = unsafe {
648 LoadImageW(
649 module,
650 IDI_APPLICATION,
651 IMAGE_ICON,
652 0,
653 0,
654 LR_DEFAULTSIZE | LR_SHARED,
655 )
656 .context("unable to load icon file")?
657 };
658 Ok(HICON(handle.0))
659}
660
661#[inline]
662fn should_auto_hide_scrollbars() -> Result<bool> {
663 let ui_settings = UISettings::new()?;
664 Ok(ui_settings.AutoHideScrollBars()?)
665}
666
667fn register_clipboard_format(format: PCWSTR) -> Result<u32> {
668 let ret = unsafe { RegisterClipboardFormatW(format) };
669 if ret == 0 {
670 Err(anyhow::anyhow!(
671 "Error when registering clipboard format: {}",
672 std::io::Error::last_os_error()
673 ))
674 } else {
675 Ok(ret)
676 }
677}
678
679fn write_to_clipboard(item: ClipboardItem, hash_format: u32, metadata_format: u32) {
680 write_to_clipboard_inner(item, hash_format, metadata_format).log_err();
681 unsafe { CloseClipboard().log_err() };
682}
683
684fn write_to_clipboard_inner(
685 item: ClipboardItem,
686 hash_format: u32,
687 metadata_format: u32,
688) -> Result<()> {
689 unsafe {
690 OpenClipboard(None)?;
691 EmptyClipboard()?;
692 let encode_wide = item
693 .text()
694 .unwrap_or_default()
695 .encode_utf16()
696 .chain(Some(0))
697 .collect_vec();
698 set_data_to_clipboard(&encode_wide, CF_UNICODETEXT.0 as u32)?;
699
700 if let Some((metadata, text)) = item.metadata().zip(item.text()) {
701 let hash_result = {
702 let hash = ClipboardString::text_hash(&text);
703 hash.to_ne_bytes()
704 };
705 let encode_wide = std::slice::from_raw_parts(hash_result.as_ptr().cast::<u16>(), 4);
706 set_data_to_clipboard(encode_wide, hash_format)?;
707
708 let metadata_wide = metadata.encode_utf16().chain(Some(0)).collect_vec();
709 set_data_to_clipboard(&metadata_wide, metadata_format)?;
710 }
711 }
712 Ok(())
713}
714
715fn set_data_to_clipboard(data: &[u16], format: u32) -> Result<()> {
716 unsafe {
717 let global = GlobalAlloc(GMEM_MOVEABLE, data.len() * 2)?;
718 let handle = GlobalLock(global);
719 u_memcpy(handle as _, data.as_ptr(), data.len() as _);
720 let _ = GlobalUnlock(global);
721 SetClipboardData(format, HANDLE(global.0))?;
722 }
723 Ok(())
724}
725
726fn read_from_clipboard(hash_format: u32, metadata_format: u32) -> Option<ClipboardItem> {
727 let result = read_from_clipboard_inner(hash_format, metadata_format).log_err();
728 unsafe { CloseClipboard().log_err() };
729 result
730}
731
732fn read_from_clipboard_inner(hash_format: u32, metadata_format: u32) -> Result<ClipboardItem> {
733 unsafe {
734 OpenClipboard(None)?;
735 let text = {
736 let handle = GetClipboardData(CF_UNICODETEXT.0 as u32)?;
737 let text = PCWSTR(handle.0 as *const u16);
738 String::from_utf16_lossy(text.as_wide())
739 };
740 let Some(hash) = read_hash_from_clipboard(hash_format) else {
741 return Ok(ClipboardItem::new_string(text));
742 };
743 let Some(metadata) = read_metadata_from_clipboard(metadata_format) else {
744 return Ok(ClipboardItem::new_string(text));
745 };
746 if hash == ClipboardString::text_hash(&text) {
747 Ok(ClipboardItem::new_string_with_metadata(text, metadata))
748 } else {
749 Ok(ClipboardItem::new_string(text))
750 }
751 }
752}
753
754fn read_hash_from_clipboard(hash_format: u32) -> Option<u64> {
755 unsafe {
756 let handle = GetClipboardData(hash_format).log_err()?;
757 let raw_ptr = handle.0 as *const u16;
758 let hash_bytes: [u8; 8] = std::slice::from_raw_parts(raw_ptr.cast::<u8>(), 8)
759 .to_vec()
760 .try_into()
761 .log_err()?;
762 Some(u64::from_ne_bytes(hash_bytes))
763 }
764}
765
766fn read_metadata_from_clipboard(metadata_format: u32) -> Option<String> {
767 unsafe {
768 let handle = GetClipboardData(metadata_format).log_err()?;
769 let text = PCWSTR(handle.0 as *const u16);
770 Some(String::from_utf16_lossy(text.as_wide()))
771 }
772}
773
774// clipboard
775pub const CLIPBOARD_HASH_FORMAT: PCWSTR = windows::core::w!("zed-text-hash");
776pub const CLIPBOARD_METADATA_FORMAT: PCWSTR = windows::core::w!("zed-metadata");
777
778#[cfg(test)]
779mod tests {
780 use crate::{ClipboardItem, Platform, WindowsPlatform};
781
782 #[test]
783 fn test_clipboard() {
784 let platform = WindowsPlatform::new();
785 let item = ClipboardItem::new_string("你好".to_string());
786 platform.write_to_clipboard(item.clone());
787 assert_eq!(platform.read_from_clipboard(), Some(item));
788
789 let item = ClipboardItem::new_string("12345".to_string());
790 platform.write_to_clipboard(item.clone());
791 assert_eq!(platform.read_from_clipboard(), Some(item));
792
793 let item = ClipboardItem::new_string_with_json_metadata("abcdef".to_string(), vec![3, 4]);
794 platform.write_to_clipboard(item.clone());
795 assert_eq!(platform.read_from_clipboard(), Some(item));
796 }
797}