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wayland: reduce amount of empty preedits

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If we send empty preedit before, don't send it again.
This commit is contained in:
Kirill Chibisov 2025-09-13 06:53:29 +09:00 • committed by GitHub
parent 3be30affe4
commit 66283a79bd
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GPG key ID: B5690EEEBB952194
1 changed files with 29 additions and 3 deletions
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32
winit-wayland/src/seat/text_input/mod.rs
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@ -84,6 +84,7 @@ impl Dispatch<ZwpTextInputV3, TextInputData, WinitState> for TextInputState {
},
TextInputEvent::Leave { surface } => {
text_input_data.surface = None;
text_input_data.last_preedit_empty = true;
// Always issue a disable.
text_input.disable();
@ -129,6 +130,13 @@ impl Dispatch<ZwpTextInputV3, TextInputData, WinitState> for TextInputState {
None => return,
};
// Just in case some IME sends an event for the disabled window.
if let Some(window) = windows.get(&window_id) {
if window.lock().unwrap().text_input_state().is_none() {
return;
}
};
// The events are sent to the user separately, so
// CAUTION: events must always arrive in the order compatible with the application
// order specified by the text-input-v3 protocol:
@ -153,14 +161,17 @@ impl Dispatch<ZwpTextInputV3, TextInputData, WinitState> for TextInputState {
);
}
// Clear preedit, unless all we'll be doing next is sending a new preedit.
// Clear preedit, unless all we'll be doing next is sending a new preedit and
// the last preedit wasn't empty.
if text_input_data.pending_commit.is_some()
|| text_input_data.pending_preedit.is_none()
|| (text_input_data.pending_preedit.is_none()
&& !text_input_data.last_preedit_empty)
{
state.events_sink.push_window_event(
WindowEvent::Ime(Ime::Preedit(String::new(), None)),
window_id,
);
text_input_data.last_preedit_empty = true;
}
// Send `Commit`.
@ -175,6 +186,7 @@ impl Dispatch<ZwpTextInputV3, TextInputData, WinitState> for TextInputState {
let cursor_range =
preedit.cursor_begin.map(|b| (b, preedit.cursor_end.unwrap_or(b)));
text_input_data.last_preedit_empty = false;
state.events_sink.push_window_event(
WindowEvent::Ime(Ime::Preedit(preedit.text, cursor_range)),
window_id,
@ -238,7 +250,6 @@ pub struct TextInputData {
inner: std::sync::Mutex<TextInputDataInner>,
}
#[derive(Default)]
pub struct TextInputDataInner {
/// The `WlSurface` we're performing input to.
surface: Option<WlSurface>,
@ -251,6 +262,21 @@ pub struct TextInputDataInner {
/// The text around the cursor to delete on `done`
pending_delete: Option<DeleteSurroundingText>,
/// Last preedit empty.
last_preedit_empty: bool,
}
impl Default for TextInputDataInner {
fn default() -> Self {
Self {
surface: None,
pending_commit: None,
pending_preedit: None,
pending_delete: None,
last_preedit_empty: true,
}
}
}
/// The state of the preedit.