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Implemented backspace and delete.

This commit is contained in:
Samuel Guerra 2023-06-02 01:16:36 -03:00
parent 73f18457ee
commit 323d436afb
1 changed files with 34 additions and 15 deletions
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49
zero-ui/src/widgets/text/nodes.rs
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@ -330,25 +330,44 @@ pub fn resolve_text(child: impl UiNode, text: impl IntoVar<Txt>) -> impl UiNode
args.propagation().stop();
if args.is_backspace() {
let _ = text.modify(move |t| {
if !t.as_ref().is_empty() {
let t = t.to_mut().to_mut();
if let Some('\n') = t.pop() {
if t.ends_with('\r') {
t.pop();
// backspace removes by char, except "\r\n"
if let Some(caret_idx) = &mut resolved.caret_index {
let (rmv_char, rmv_prev) = text.with(|t| {
let mut iter = t[..*caret_idx].char_indices().rev();
(iter.next(), iter.next())
});
let (rmv_idx, mut rmv_count) = match (rmv_prev, rmv_char) {
(Some((i, '\r')), Some((_, '\n'))) => (i, 2),
(_, Some((i, _))) => (i, 1),
_ => (0, 0),
};
if rmv_count > 0 {
*caret_idx = rmv_idx;
let _ = text.modify(move |t| {
let t = t.to_mut().to_mut();
while rmv_count > 0 {
t.remove(rmv_idx);
rmv_count -= 1;
}
}
});
}
});
}
} else if args.is_delete() {
let _ = text.modify(move |t| {
if !t.as_ref().is_empty() {
let t = t.to_mut().to_mut();
if t.remove(0) == '\r' && t.starts_with('\n') {
t.remove(0);
}
// delete removes by grapheme cluster
if let Some(caret_idx) = &mut resolved.caret_index {
let rmv = *caret_idx..resolved.text.next_insert_index(*caret_idx);
if !rmv.is_empty() {
let _ = text.modify(move |t| {
let t = t.to_mut().to_mut();
t.replace_range(rmv, "");
});
// restore animation when the caret_index did not change
resolved.caret_opacity = KEYBOARD.caret_animation();
EditData::get(&mut edit_data).caret_animation =
resolved.caret_opacity.subscribe(UpdateOp::RenderUpdate, WIDGET.id());
}
});
}
} else if let Some(c) = args.insert_char() {
// insert
let i = resolved.caret_index.unwrap();