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winit-core: add Ime::DeleteSurroundingText API

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This completes the basic API required for e.g. Wayland.
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DorotaC 2025-08-02 12:17:27 +02:00 • committed by GitHub
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4 changed files with 81 additions and 5 deletions
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18
winit-core/src/event.rs
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@ -879,6 +879,8 @@ impl From<ModifiersState> for Modifiers {
/// Describes [input method](https://en.wikipedia.org/wiki/Input_method) events.
///
/// The `Ime` events must be applied in the order they arrive.
///
/// This is also called a "composition event".
///
/// Most keypresses using a latin-like keyboard layout simply generate a
@ -935,7 +937,7 @@ pub enum Ime {
/// position. When it's `None`, the cursor should be hidden. When `String` is an empty string
/// this indicates that preedit was cleared.
///
/// The cursor position is byte-wise indexed.
/// The cursor position is byte-wise indexed, assuming UTF-8.
Preedit(String, Option<(usize, usize)>),
/// Notifies when text should be inserted into the editor widget.
@ -943,6 +945,20 @@ pub enum Ime {
/// Right before this event winit will send empty [`Self::Preedit`] event.
Commit(String),
/// Delete text surrounding the cursor or selection.
///
/// This event does not affect either the pre-edit string.
/// This means that the application must first remove the pre-edit,
/// then execute the deletion, then insert the removed text back.
///
/// This event assumes text is stored in UTF-8.
DeleteSurrounding {
/// Bytes to remove before the selection
before_bytes: usize,
/// Bytes to remove after the selection
after_bytes: usize,
},
/// Notifies when the IME was disabled.
///
/// After receiving this event you won't get any more [`Preedit`][Self::Preedit] or