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Fix Windows IME candidate window position

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kumattau 2022-05-11 23:32:57 +09:00 committed by Wez Furlong
parent cba1cfe533
commit ae4e3a65a2
1 changed files with 46 additions and 13 deletions
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59
window/src/os/windows/window.rs
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@ -49,8 +49,21 @@ use winreg::RegKey;
const GCS_RESULTSTR: DWORD = 0x800;
const GCS_COMPSTR: DWORD = 0x8;
const ISC_SHOWUICOMPOSITIONWINDOW: LPARAM = 2147483648;
#[allow(non_snake_case)]
#[repr(C)]
pub struct CANDIDATEFORM {
dwIndex: DWORD,
dwStyle: DWORD,
ptCurrentPos: POINT,
rcArea: RECT,
}
pub type LPCANDIDATEFORM = *mut CANDIDATEFORM;
extern "system" {
pub fn ImmGetCompositionStringW(himc: HIMC, index: DWORD, buf: LPVOID, buflen: DWORD) -> LONG;
pub fn ImmSetCandidateWindow(himc: HIMC, lpCandidate: LPCANDIDATEFORM) -> BOOL;
}
lazy_static! {
@ -255,7 +268,7 @@ impl WindowInner {
if !same {
let imc = ImmContext::get(self.hwnd.0);
imc.set_position(0, 0);
imc.set_position(Rect::default());
self.events.dispatch(WindowEvent::Resized {
dimensions: current_dims,
@ -718,7 +731,7 @@ impl WindowInner {
fn set_text_cursor_position(&mut self, cursor: Rect) {
let imc = ImmContext::get(self.hwnd.0);
imc.set_position(cursor.origin.x.max(0) as i32, cursor.max_y().max(0) as i32);
imc.set_position(cursor);
}
fn config_did_change(&mut self, config: &ConfigHandle) {
@ -1653,21 +1666,28 @@ impl ImmContext {
}
}
/// Set the position of the IME window relative to the top left
/// of this window
pub fn set_position(&self, x: i32, y: i32) {
let mut cf = COMPOSITIONFORM {
dwStyle: CFS_POINT,
ptCurrentPos: POINT { x, y },
/// Set the position of the IME candidate window relative to the cursor.
pub fn set_position(&self, cursor: Rect) {
let mut cf = CANDIDATEFORM {
dwIndex: 0,
// Don't draw the IME candidate window on the cursor
// to prevent the window from hiding composition (preedit) string
dwStyle: CFS_EXCLUDE,
// cursor position the IME candidate window bases on
ptCurrentPos: POINT {
x: cursor.origin.x.max(0) as i32,
y: cursor.origin.y.max(0) as i32,
},
// cursor rectangle the IME candidate window excludes
rcArea: RECT {
bottom: 0,
left: 0,
right: 0,
top: 0,
left: cursor.min_x().max(0) as i32,
top: cursor.min_y().max(0) as i32,
right: cursor.max_x().max(0) as i32,
bottom: cursor.max_y().max(0) as i32,
},
};
unsafe {
ImmSetCompositionWindow(self.imc, &mut cf);
ImmSetCandidateWindow(self.imc, &mut cf);
}
}
@ -1701,6 +1721,18 @@ impl Drop for ImmContext {
}
}
unsafe fn ime_set_context(
hwnd: HWND,
msg: UINT,
wparam: WPARAM,
lparam: LPARAM,
) -> Option<LRESULT> {
// Don't show system CompositionWindow because application itself draws it
let lparam = lparam & !ISC_SHOWUICOMPOSITIONWINDOW;
let result = DefWindowProcW(hwnd, msg, wparam, lparam);
Some(result)
}
unsafe fn ime_end_composition(
hwnd: HWND,
_msg: UINT,
@ -2461,6 +2493,7 @@ unsafe fn do_wnd_proc(hwnd: HWND, msg: UINT, wparam: WPARAM, lparam: LPARAM) ->
None
}
WM_SETTINGCHANGE => apply_theme(hwnd),
WM_IME_SETCONTEXT => ime_set_context(hwnd, msg, wparam, lparam),
WM_IME_COMPOSITION => ime_composition(hwnd, msg, wparam, lparam),
WM_IME_ENDCOMPOSITION => ime_end_composition(hwnd, msg, wparam, lparam),
WM_MOUSEMOVE => mouse_move(hwnd, msg, wparam, lparam),