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input: Fix move up/down to keep same column. (#968)

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Close #908

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Jason Lee 2025-06-17 15:23:37 +08:00 committed by GitHub
parent 3d7f1f8a73
commit edf9ed7e5f
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3 changed files with 46 additions and 41 deletions
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2
crates/ui/src/input/element.rs
View file

@ -797,6 +797,7 @@ impl Element for TextElement {
bounds,
last_layout: LastLayout {
lines: Rc::new(lines),
line_height,
},
scroll_size,
line_numbers,
@ -933,7 +934,6 @@ impl Element for TextElement {
input.last_layout = Some(prepaint.last_layout.clone());
input.last_bounds = Some(bounds);
input.last_cursor_offset = Some(input.cursor_offset());
input.last_line_height = line_height;
input.set_input_bounds(input_bounds, cx);
input.last_selected_range = Some(selected_range);
input.scroll_size = prepaint.scroll_size;

3
crates/ui/src/input/hover_popover.rs
View file

@ -35,13 +35,14 @@ impl DiagnosticPopover {
let Some(range) = self.marker.range.as_ref() else {
return None;
};
let line_number_width = self.state.read(cx).line_number_width;
let (_, _, start_pos) = self
.state
.read(cx)
.line_and_position_for_offset(range.start);
start_pos
start_pos.map(|pos| pos + Point::new(line_number_width, px(0.)))
}
pub(super) fn show(&mut self, cx: &mut Context<Self>) {

82
crates/ui/src/input/state.rs
View file

@ -213,7 +213,10 @@ pub fn init(cx: &mut App) {
#[derive(Clone)]
pub(super) struct LastLayout {
/// The last layout lines.
pub(super) lines: Rc<SmallVec<[WrappedLine; 1]>>,
/// The line_height of text layout, this will change will InputElement painted.
pub(super) line_height: Pixels,
}
impl Deref for LastLayout {
@ -243,11 +246,8 @@ pub struct InputState {
pub(super) selection_reversed: bool,
/// The marked range is the temporary insert text on IME typing.
pub(super) marked_range: Option<Range<usize>>,
/// The last layout lines.
pub(super) last_layout: Option<LastLayout>,
pub(super) last_cursor_offset: Option<usize>,
/// The line_height of text layout, this will change will InputElement painted.
pub(super) last_line_height: Pixels,
/// The input container bounds
pub(super) input_bounds: Bounds<Pixels>,
/// The text bounds
@ -272,7 +272,7 @@ pub struct InputState {
/// Popover
diagnostic_popover: Option<Entity<DiagnosticPopover>>,
/// To remember the horizontal column (x-coordinate) of the cursor position.
/// To remember the horizontal column (x-coordinate) of the cursor position for keep column for move up/down.
preferred_x_offset: Option<Pixels>,
_subscriptions: Vec<Subscription>,
}
@ -334,7 +334,6 @@ impl InputState {
last_layout: None,
last_bounds: None,
last_selected_range: None,
last_line_height: px(20.),
last_cursor_offset: None,
scroll_handle: ScrollHandle::new(),
scroll_state: ScrollbarState::default(),
@ -511,18 +510,15 @@ impl InputState {
/// Called after moving the cursor. Updates preferred_x_offset if we know where the cursor now is.
fn update_preferred_x_offset(&mut self, _cx: &mut Context<Self>) {
if let (Some(_), Some(bounds)) = (&self.last_layout, &self.last_bounds) {
let offset = self.cursor_offset();
let (Some(_), Some(bounds)) = (&self.last_layout, &self.last_bounds) else {
return;
};
// Find which line and sub-line the cursor is on and its position
let (_line_index, _sub_line_index, cursor_pos) =
self.line_and_position_for_offset(offset);
// Find which line and sub-line the cursor is on and its position
let (_, _, cursor_pos) = self.line_and_position_for_offset(self.cursor_offset());
if let Some(pos) = cursor_pos {
// Adjust by scroll offset
let scroll_offset = bounds.origin;
self.preferred_x_offset = Some(pos.x + scroll_offset.x);
}
if let Some(pos) = cursor_pos {
self.preferred_x_offset = Some(pos.x + bounds.origin.x);
}
}
@ -537,19 +533,18 @@ impl InputState {
&self,
offset: usize,
) -> (usize, usize, Option<Point<Pixels>>) {
let Some(lines) = &self.last_layout else {
let Some(last_layout) = &self.last_layout else {
return (0, 0, None);
};
let line_height = self.last_line_height;
let line_number_width = self.line_number_width;
let line_height = last_layout.line_height;
let mut prev_lines_offset = 0;
let mut y_offset = px(0.);
for (line_index, line) in lines.iter().enumerate() {
for (line_index, line) in last_layout.lines.iter().enumerate() {
let local_offset = offset.saturating_sub(prev_lines_offset);
if let Some(pos) = line.position_for_index(local_offset, line_height) {
let sub_line_index = (pos.y.0 / line_height.0) as usize;
let adjusted_pos = point(pos.x + line_number_width, pos.y + y_offset);
let adjusted_pos = point(pos.x, pos.y + y_offset);
return (line_index, sub_line_index, Some(adjusted_pos));
}
@ -566,12 +561,13 @@ impl InputState {
return;
}
let (Some(lines), Some(bounds)) = (&self.last_layout, &self.last_bounds) else {
let (Some(last_layout), Some(bounds)) = (&self.last_layout, &self.last_bounds) else {
return;
};
let offset = self.cursor_offset();
let line_height = self.last_line_height;
let preferred_x_offset = self.preferred_x_offset;
let line_height = last_layout.line_height;
let (current_line_index, current_sub_line, current_pos) =
self.line_and_position_for_offset(offset);
@ -598,14 +594,14 @@ impl InputState {
if new_sub_line < 0 {
if new_line_index > 0 {
new_line_index -= 1;
new_sub_line = lines[new_line_index].wrap_boundaries.len() as i32;
new_sub_line = last_layout.lines[new_line_index].wrap_boundaries.len() as i32;
} else {
new_sub_line = 0;
}
} else {
let max_sub_line = lines[new_line_index].wrap_boundaries.len() as i32;
let max_sub_line = last_layout.lines[new_line_index].wrap_boundaries.len() as i32;
if new_sub_line > max_sub_line {
if new_line_index < lines.len() - 1 {
if new_line_index < last_layout.lines.len() - 1 {
new_line_index += 1;
new_sub_line = 0;
} else {
@ -619,7 +615,7 @@ impl InputState {
return;
}
let target_line = &lines[new_line_index];
let target_line = &last_layout.lines[new_line_index];
let line_x = current_x - bounds.origin.x;
let target_sub_line = new_sub_line as usize;
@ -627,12 +623,12 @@ impl InputState {
let index_res = target_line.index_for_position(approx_pos, line_height);
let new_local_index = match index_res {
Ok(i) => i + 1,
Ok(i) => i,
Err(i) => i,
};
let mut prev_lines_offset = 0;
for (i, l) in lines.iter().enumerate() {
for (i, l) in last_layout.lines.iter().enumerate() {
if i == new_line_index {
break;
}
@ -642,6 +638,8 @@ impl InputState {
let new_offset = (prev_lines_offset + new_local_index).min(self.text.len());
self.selected_range = new_offset..new_offset;
self.pause_blink_cursor(cx);
// Set back the preferred_x_offset
self.preferred_x_offset = preferred_x_offset;
cx.notify();
}
@ -1515,10 +1513,15 @@ impl InputState {
pub(super) fn on_scroll_wheel(
&mut self,
event: &ScrollWheelEvent,
_window: &mut Window,
window: &mut Window,
cx: &mut Context<Self>,
) {
let delta = event.delta.pixel_delta(self.last_line_height);
let line_height = self
.last_layout
.as_ref()
.map(|layout| layout.line_height)
.unwrap_or(window.line_height());
let delta = event.delta.pixel_delta(line_height);
self.update_scroll_offset(Some(self.scroll_handle.offset() + delta), cx);
self.diagnostic_popover = None;
}
@ -1663,12 +1666,13 @@ impl InputState {
return 0;
}
let (Some(bounds), Some(lines)) = (self.last_bounds.as_ref(), self.last_layout.as_ref())
let (Some(bounds), Some(last_layout)) =
(self.last_bounds.as_ref(), self.last_layout.as_ref())
else {
return 0;
};
let line_height = self.last_line_height;
let line_height = last_layout.line_height;
// TIP: About the IBeam cursor
//
@ -1685,7 +1689,7 @@ impl InputState {
let mut index = 0;
let mut y_offset = px(0.);
for (_, line) in lines.iter().enumerate() {
for (_, line) in last_layout.lines.iter().enumerate() {
let line_origin = self.line_origin_with_y_offset(&mut y_offset, &line, line_height);
let pos = inner_position - line_origin;
@ -2172,8 +2176,8 @@ impl EntityInputHandler for InputState {
_window: &mut Window,
_cx: &mut Context<Self>,
) -> Option<Bounds<Pixels>> {
let line_height = self.last_line_height;
let lines = self.last_layout.as_ref()?;
let last_layout = self.last_layout.as_ref()?;
let line_height = last_layout.line_height;
let range = self.range_from_utf16(&range_utf16);
let mut start_origin = None;
@ -2182,7 +2186,7 @@ impl EntityInputHandler for InputState {
let mut y_offset = px(0.);
let mut index_offset = 0;
for line in lines.iter() {
for line in last_layout.lines.iter() {
if start_origin.is_some() && end_origin.is_some() {
break;
}
@ -2225,11 +2229,11 @@ impl EntityInputHandler for InputState {
_window: &mut Window,
_cx: &mut Context<Self>,
) -> Option<usize> {
let line_height = self.last_line_height;
let last_layout = self.last_layout.as_ref()?;
let line_height = last_layout.line_height;
let line_point = self.last_bounds?.localize(&point)?;
let lines = self.last_layout.as_ref()?;
for line in lines.iter() {
for line in last_layout.lines.iter() {
if let Ok(utf8_index) = line.index_for_position(line_point, line_height) {
return Some(self.offset_to_utf16(utf8_index));
}