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Keep only one selection when starting to add selections above/below

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Co-Authored-By: Nathan Sobo <nathan@zed.dev>
This commit is contained in:
Antonio Scandurra 2021-05-10 18:22:25 +02:00
parent 3fe64400c6
commit 951aa0e443
1 changed files with 24 additions and 18 deletions
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42
zed/src/editor/buffer_view.rs
View file

@ -17,7 +17,6 @@ use smallvec::SmallVec;
use smol::Timer;
use std::{
cmp::{self, Ordering},
collections::HashSet,
fmt::Write,
iter::FromIterator,
mem,
@ -307,7 +306,7 @@ pub struct BufferView {
struct AddSelectionsState {
above: bool,
stack: Vec<HashSet<usize>>,
stack: Vec<usize>,
}
#[derive(Serialize, Deserialize)]
@ -1799,24 +1798,34 @@ impl BufferView {
let app = ctx.as_ref();
let buffer = self.buffer.read(app);
let selections = self.selections(app);
let mut state = self
.add_selections_state
.take()
.unwrap_or_else(|| AddSelectionsState {
let mut selections = self.selections(app);
let mut state = if let Some(state) = self.add_selections_state.take() {
state
} else {
let (ix, oldest_selection) = selections
.iter()
.enumerate()
.min_by_key(|(_, s)| s.id)
.unwrap();
selections = &selections[ix..ix + 1];
AddSelectionsState {
above,
stack: vec![selections.iter().map(|s| s.id).collect()],
});
stack: vec![oldest_selection.id],
}
};
let last_added_selections = state.stack.last().unwrap();
let last_added_selection = *state.stack.last().unwrap();
let mut new_selections = Vec::new();
if above == state.above {
let mut added_selections = HashSet::new();
for selection in selections {
if last_added_selections.contains(&selection.id) {
if selection.id == last_added_selection {
let range = selection.display_range(&self.display_map, app).sorted();
let mut row = range.start.row();
let mut row = if above {
range.start.row()
} else {
range.end.row()
};
let start_column;
let end_column;
if let SelectionGoal::ColumnRange { start, end } = selection.goal {
@ -1857,7 +1866,7 @@ impl BufferView {
end: end_column,
},
});
added_selections.insert(id);
state.stack.push(id);
break;
}
}
@ -1866,15 +1875,12 @@ impl BufferView {
new_selections.push(selection.clone());
}
if !added_selections.is_empty() {
state.stack.push(added_selections);
}
new_selections.sort_unstable_by(|a, b| a.start.cmp(&b.start, buffer).unwrap());
} else {
new_selections.extend(
selections
.into_iter()
.filter(|s| !last_added_selections.contains(&s.id))
.filter(|s| s.id != last_added_selection)
.cloned(),
);
state.stack.pop();