1237 lines
43 KiB
Rust
1237 lines
43 KiB
Rust
//! Movement module contains helper functions for calculating intended position
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//! in editor given a given motion (e.g. it handles converting a "move left" command into coordinates in editor). It is exposed mostly for use by vim crate.
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use super::{Bias, DisplayPoint, DisplaySnapshot, SelectionGoal, ToDisplayPoint};
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use crate::{DisplayRow, EditorStyle, ToOffset, ToPoint, scroll::ScrollAnchor};
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use gpui::{Pixels, WindowTextSystem};
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use language::Point;
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use multi_buffer::{MultiBufferRow, MultiBufferSnapshot};
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use serde::Deserialize;
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use workspace::searchable::Direction;
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use std::{ops::Range, sync::Arc};
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/// Defines search strategy for items in `movement` module.
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/// `FindRange::SingeLine` only looks for a match on a single line at a time, whereas
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/// `FindRange::MultiLine` keeps going until the end of a string.
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Deserialize)]
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pub enum FindRange {
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SingleLine,
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MultiLine,
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}
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/// TextLayoutDetails encompasses everything we need to move vertically
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/// taking into account variable width characters.
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pub struct TextLayoutDetails {
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pub(crate) text_system: Arc<WindowTextSystem>,
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pub(crate) editor_style: EditorStyle,
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pub(crate) rem_size: Pixels,
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pub scroll_anchor: ScrollAnchor,
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pub visible_rows: Option<f32>,
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pub vertical_scroll_margin: f32,
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}
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/// Returns a column to the left of the current point, wrapping
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/// to the previous line if that point is at the start of line.
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pub fn left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
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if point.column() > 0 {
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*point.column_mut() -= 1;
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} else if point.row().0 > 0 {
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*point.row_mut() -= 1;
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*point.column_mut() = map.line_len(point.row());
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}
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map.clip_point(point, Bias::Left)
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}
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/// Returns a column to the left of the current point, doing nothing if
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/// that point is already at the start of line.
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pub fn saturating_left(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
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if point.column() > 0 {
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*point.column_mut() -= 1;
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} else if point.column() == 0 {
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// If the current sofr_wrap mode is used, the column corresponding to the display is 0,
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// which does not necessarily mean that the actual beginning of a paragraph
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if map.display_point_to_fold_point(point, Bias::Left).column() > 0 {
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return left(map, point);
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}
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}
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map.clip_point(point, Bias::Left)
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}
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/// Returns a column to the right of the current point, wrapping
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/// to the next line if that point is at the end of line.
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pub fn right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
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if point.column() < map.line_len(point.row()) {
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*point.column_mut() += 1;
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} else if point.row() < map.max_point().row() {
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*point.row_mut() += 1;
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*point.column_mut() = 0;
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}
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map.clip_point(point, Bias::Right)
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}
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/// Returns a column to the right of the current point, not performing any wrapping
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/// if that point is already at the end of line.
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pub fn saturating_right(map: &DisplaySnapshot, mut point: DisplayPoint) -> DisplayPoint {
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*point.column_mut() += 1;
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map.clip_point(point, Bias::Right)
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}
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/// Returns a display point for the preceding displayed line (which might be a soft-wrapped line).
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pub fn up(
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map: &DisplaySnapshot,
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start: DisplayPoint,
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goal: SelectionGoal,
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preserve_column_at_start: bool,
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text_layout_details: &TextLayoutDetails,
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) -> (DisplayPoint, SelectionGoal) {
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up_by_rows(
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map,
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start,
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1,
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goal,
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preserve_column_at_start,
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text_layout_details,
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)
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}
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/// Returns a display point for the next displayed line (which might be a soft-wrapped line).
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pub fn down(
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map: &DisplaySnapshot,
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start: DisplayPoint,
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goal: SelectionGoal,
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preserve_column_at_end: bool,
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text_layout_details: &TextLayoutDetails,
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) -> (DisplayPoint, SelectionGoal) {
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down_by_rows(
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map,
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start,
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1,
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goal,
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preserve_column_at_end,
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text_layout_details,
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)
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}
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pub(crate) fn up_by_rows(
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map: &DisplaySnapshot,
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start: DisplayPoint,
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row_count: u32,
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goal: SelectionGoal,
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preserve_column_at_start: bool,
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text_layout_details: &TextLayoutDetails,
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) -> (DisplayPoint, SelectionGoal) {
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let goal_x = match goal {
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SelectionGoal::HorizontalPosition(x) => x.into(),
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SelectionGoal::WrappedHorizontalPosition((_, x)) => x.into(),
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SelectionGoal::HorizontalRange { end, .. } => end.into(),
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_ => map.x_for_display_point(start, text_layout_details),
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};
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let prev_row = DisplayRow(start.row().0.saturating_sub(row_count));
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let mut point = map.clip_point(
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DisplayPoint::new(prev_row, map.line_len(prev_row)),
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Bias::Left,
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);
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if point.row() < start.row() {
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*point.column_mut() = map.display_column_for_x(point.row(), goal_x, text_layout_details)
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} else if preserve_column_at_start {
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return (start, goal);
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} else {
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point = DisplayPoint::new(DisplayRow(0), 0);
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}
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let mut clipped_point = map.clip_point(point, Bias::Left);
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if clipped_point.row() < point.row() {
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clipped_point = map.clip_point(point, Bias::Right);
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}
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(
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clipped_point,
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SelectionGoal::HorizontalPosition(goal_x.into()),
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)
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}
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pub(crate) fn down_by_rows(
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map: &DisplaySnapshot,
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start: DisplayPoint,
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row_count: u32,
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goal: SelectionGoal,
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preserve_column_at_end: bool,
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text_layout_details: &TextLayoutDetails,
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) -> (DisplayPoint, SelectionGoal) {
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let goal_x = match goal {
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SelectionGoal::HorizontalPosition(x) => x.into(),
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SelectionGoal::WrappedHorizontalPosition((_, x)) => x.into(),
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SelectionGoal::HorizontalRange { end, .. } => end.into(),
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_ => map.x_for_display_point(start, text_layout_details),
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};
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let new_row = DisplayRow(start.row().0 + row_count);
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let mut point = map.clip_point(DisplayPoint::new(new_row, 0), Bias::Right);
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if point.row() > start.row() {
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*point.column_mut() = map.display_column_for_x(point.row(), goal_x, text_layout_details)
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} else if preserve_column_at_end {
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return (start, goal);
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} else {
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point = map.max_point();
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}
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let mut clipped_point = map.clip_point(point, Bias::Right);
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if clipped_point.row() > point.row() {
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clipped_point = map.clip_point(point, Bias::Left);
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}
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(
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clipped_point,
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SelectionGoal::HorizontalPosition(goal_x.into()),
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)
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}
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/// Returns a position of the start of line.
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/// If `stop_at_soft_boundaries` is true, the returned position is that of the
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/// displayed line (e.g. it could actually be in the middle of a text line if that line is soft-wrapped).
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/// Otherwise it's always going to be the start of a logical line.
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pub fn line_beginning(
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map: &DisplaySnapshot,
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display_point: DisplayPoint,
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stop_at_soft_boundaries: bool,
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) -> DisplayPoint {
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let point = display_point.to_point(map);
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let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
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let line_start = map.prev_line_boundary(point).1;
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if stop_at_soft_boundaries && display_point != soft_line_start {
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soft_line_start
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} else {
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line_start
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}
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}
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/// Returns the last indented position on a given line.
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/// If `stop_at_soft_boundaries` is true, the returned [`DisplayPoint`] is that of a
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/// displayed line (e.g. if there's soft wrap it's gonna be returned),
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/// otherwise it's always going to be a start of a logical line.
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pub fn indented_line_beginning(
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map: &DisplaySnapshot,
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display_point: DisplayPoint,
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stop_at_soft_boundaries: bool,
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stop_at_indent: bool,
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) -> DisplayPoint {
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let point = display_point.to_point(map);
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let soft_line_start = map.clip_point(DisplayPoint::new(display_point.row(), 0), Bias::Right);
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let indent_start = Point::new(
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point.row,
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map.buffer_snapshot
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.indent_size_for_line(MultiBufferRow(point.row))
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.len,
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)
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.to_display_point(map);
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let line_start = map.prev_line_boundary(point).1;
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if stop_at_soft_boundaries && soft_line_start > indent_start && display_point != soft_line_start
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{
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soft_line_start
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} else if stop_at_indent && (display_point > indent_start || display_point == line_start) {
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indent_start
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} else {
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line_start
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}
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}
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/// Returns a position of the end of line.
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///
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/// If `stop_at_soft_boundaries` is true, the returned position is that of the
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/// displayed line (e.g. it could actually be in the middle of a text line if that line is soft-wrapped).
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/// Otherwise it's always going to be the end of a logical line.
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pub fn line_end(
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map: &DisplaySnapshot,
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display_point: DisplayPoint,
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stop_at_soft_boundaries: bool,
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) -> DisplayPoint {
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let soft_line_end = map.clip_point(
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DisplayPoint::new(display_point.row(), map.line_len(display_point.row())),
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Bias::Left,
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);
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if stop_at_soft_boundaries && display_point != soft_line_end {
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soft_line_end
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} else {
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map.next_line_boundary(display_point.to_point(map)).1
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}
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}
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/// Returns a position of the previous word boundary, where a word character is defined as either
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/// uppercase letter, lowercase letter, '_' character or language-specific word character (like '-' in CSS).
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pub fn previous_word_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
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let raw_point = point.to_point(map);
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let classifier = map.buffer_snapshot.char_classifier_at(raw_point);
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let mut is_first_iteration = true;
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find_preceding_boundary_display_point(map, point, FindRange::MultiLine, |left, right| {
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// Make alt-left skip punctuation to respect VSCode behaviour. For example: hello.| goes to |hello.
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if is_first_iteration
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&& classifier.is_punctuation(right)
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&& !classifier.is_punctuation(left)
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&& left != '\n'
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{
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is_first_iteration = false;
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return false;
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}
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is_first_iteration = false;
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(classifier.kind(left) != classifier.kind(right) && !classifier.is_whitespace(right))
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|| left == '\n'
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})
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}
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/// Returns a position of the previous word boundary, where a word character is defined as either
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/// uppercase letter, lowercase letter, '_' character, language-specific word character (like '-' in CSS) or newline.
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pub fn previous_word_start_or_newline(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
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let raw_point = point.to_point(map);
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let classifier = map.buffer_snapshot.char_classifier_at(raw_point);
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find_preceding_boundary_display_point(map, point, FindRange::MultiLine, |left, right| {
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(classifier.kind(left) != classifier.kind(right) && !right.is_whitespace())
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|| left == '\n'
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|| right == '\n'
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})
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}
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/// Returns a position of the previous subword boundary, where a subword is defined as a run of
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/// word characters of the same "subkind" - where subcharacter kinds are '_' character,
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/// lowerspace characters and uppercase characters.
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pub fn previous_subword_start(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
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let raw_point = point.to_point(map);
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let classifier = map.buffer_snapshot.char_classifier_at(raw_point);
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find_preceding_boundary_display_point(map, point, FindRange::MultiLine, |left, right| {
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let is_word_start =
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classifier.kind(left) != classifier.kind(right) && !right.is_whitespace();
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let is_subword_start = classifier.is_word('-') && left == '-' && right != '-'
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|| left == '_' && right != '_'
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|| left.is_lowercase() && right.is_uppercase();
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is_word_start || is_subword_start || left == '\n'
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})
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}
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/// Returns a position of the next word boundary, where a word character is defined as either
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/// uppercase letter, lowercase letter, '_' character or language-specific word character (like '-' in CSS).
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pub fn next_word_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
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let raw_point = point.to_point(map);
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let classifier = map.buffer_snapshot.char_classifier_at(raw_point);
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let mut is_first_iteration = true;
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find_boundary(map, point, FindRange::MultiLine, |left, right| {
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// Make alt-right skip punctuation to respect VSCode behaviour. For example: |.hello goes to .hello|
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if is_first_iteration
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&& classifier.is_punctuation(left)
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&& !classifier.is_punctuation(right)
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&& right != '\n'
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{
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is_first_iteration = false;
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return false;
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}
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is_first_iteration = false;
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(classifier.kind(left) != classifier.kind(right) && !classifier.is_whitespace(left))
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|| right == '\n'
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})
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}
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/// Returns a position of the next word boundary, where a word character is defined as either
|
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/// uppercase letter, lowercase letter, '_' character, language-specific word character (like '-' in CSS) or newline.
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pub fn next_word_end_or_newline(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
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let raw_point = point.to_point(map);
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let classifier = map.buffer_snapshot.char_classifier_at(raw_point);
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let mut on_starting_row = true;
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find_boundary(map, point, FindRange::MultiLine, |left, right| {
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if left == '\n' {
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on_starting_row = false;
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}
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(classifier.kind(left) != classifier.kind(right)
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&& ((on_starting_row && !left.is_whitespace())
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|| (!on_starting_row && !right.is_whitespace())))
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|| right == '\n'
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})
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}
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||
|
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/// Returns a position of the next subword boundary, where a subword is defined as a run of
|
||
/// word characters of the same "subkind" - where subcharacter kinds are '_' character,
|
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/// lowerspace characters and uppercase characters.
|
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pub fn next_subword_end(map: &DisplaySnapshot, point: DisplayPoint) -> DisplayPoint {
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let raw_point = point.to_point(map);
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let classifier = map.buffer_snapshot.char_classifier_at(raw_point);
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||
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find_boundary(map, point, FindRange::MultiLine, |left, right| {
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let is_word_end =
|
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(classifier.kind(left) != classifier.kind(right)) && !classifier.is_whitespace(left);
|
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let is_subword_end = classifier.is_word('-') && left != '-' && right == '-'
|
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|| left != '_' && right == '_'
|
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|| left.is_lowercase() && right.is_uppercase();
|
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is_word_end || is_subword_end || right == '\n'
|
||
})
|
||
}
|
||
|
||
/// Returns a position of the start of the current paragraph, where a paragraph
|
||
/// is defined as a run of non-blank lines.
|
||
pub fn start_of_paragraph(
|
||
map: &DisplaySnapshot,
|
||
display_point: DisplayPoint,
|
||
mut count: usize,
|
||
) -> DisplayPoint {
|
||
let point = display_point.to_point(map);
|
||
if point.row == 0 {
|
||
return DisplayPoint::zero();
|
||
}
|
||
|
||
let mut found_non_blank_line = false;
|
||
for row in (0..point.row + 1).rev() {
|
||
let blank = map.buffer_snapshot.is_line_blank(MultiBufferRow(row));
|
||
if found_non_blank_line && blank {
|
||
if count <= 1 {
|
||
return Point::new(row, 0).to_display_point(map);
|
||
}
|
||
count -= 1;
|
||
found_non_blank_line = false;
|
||
}
|
||
|
||
found_non_blank_line |= !blank;
|
||
}
|
||
|
||
DisplayPoint::zero()
|
||
}
|
||
|
||
/// Returns a position of the end of the current paragraph, where a paragraph
|
||
/// is defined as a run of non-blank lines.
|
||
pub fn end_of_paragraph(
|
||
map: &DisplaySnapshot,
|
||
display_point: DisplayPoint,
|
||
mut count: usize,
|
||
) -> DisplayPoint {
|
||
let point = display_point.to_point(map);
|
||
if point.row == map.buffer_snapshot.max_row().0 {
|
||
return map.max_point();
|
||
}
|
||
|
||
let mut found_non_blank_line = false;
|
||
for row in point.row..=map.buffer_snapshot.max_row().0 {
|
||
let blank = map.buffer_snapshot.is_line_blank(MultiBufferRow(row));
|
||
if found_non_blank_line && blank {
|
||
if count <= 1 {
|
||
return Point::new(row, 0).to_display_point(map);
|
||
}
|
||
count -= 1;
|
||
found_non_blank_line = false;
|
||
}
|
||
|
||
found_non_blank_line |= !blank;
|
||
}
|
||
|
||
map.max_point()
|
||
}
|
||
|
||
pub fn start_of_excerpt(
|
||
map: &DisplaySnapshot,
|
||
display_point: DisplayPoint,
|
||
direction: Direction,
|
||
) -> DisplayPoint {
|
||
let point = map.display_point_to_point(display_point, Bias::Left);
|
||
let Some(excerpt) = map.buffer_snapshot.excerpt_containing(point..point) else {
|
||
return display_point;
|
||
};
|
||
match direction {
|
||
Direction::Prev => {
|
||
let mut start = excerpt.start_anchor().to_display_point(map);
|
||
if start >= display_point && start.row() > DisplayRow(0) {
|
||
let Some(excerpt) = map.buffer_snapshot.excerpt_before(excerpt.id()) else {
|
||
return display_point;
|
||
};
|
||
start = excerpt.start_anchor().to_display_point(map);
|
||
}
|
||
start
|
||
}
|
||
Direction::Next => {
|
||
let mut end = excerpt.end_anchor().to_display_point(map);
|
||
*end.row_mut() += 1;
|
||
map.clip_point(end, Bias::Right)
|
||
}
|
||
}
|
||
}
|
||
|
||
pub fn end_of_excerpt(
|
||
map: &DisplaySnapshot,
|
||
display_point: DisplayPoint,
|
||
direction: Direction,
|
||
) -> DisplayPoint {
|
||
let point = map.display_point_to_point(display_point, Bias::Left);
|
||
let Some(excerpt) = map.buffer_snapshot.excerpt_containing(point..point) else {
|
||
return display_point;
|
||
};
|
||
match direction {
|
||
Direction::Prev => {
|
||
let mut start = excerpt.start_anchor().to_display_point(map);
|
||
if start.row() > DisplayRow(0) {
|
||
*start.row_mut() -= 1;
|
||
}
|
||
start = map.clip_point(start, Bias::Left);
|
||
*start.column_mut() = 0;
|
||
start
|
||
}
|
||
Direction::Next => {
|
||
let mut end = excerpt.end_anchor().to_display_point(map);
|
||
*end.column_mut() = 0;
|
||
if end <= display_point {
|
||
*end.row_mut() += 1;
|
||
let point_end = map.display_point_to_point(end, Bias::Right);
|
||
let Some(excerpt) = map.buffer_snapshot.excerpt_containing(point_end..point_end)
|
||
else {
|
||
return display_point;
|
||
};
|
||
end = excerpt.end_anchor().to_display_point(map);
|
||
*end.column_mut() = 0;
|
||
}
|
||
end
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Scans for a boundary preceding the given start point `from` until a boundary is found,
|
||
/// indicated by the given predicate returning true.
|
||
/// The predicate is called with the character to the left and right of the candidate boundary location.
|
||
/// If FindRange::SingleLine is specified and no boundary is found before the start of the current line, the start of the current line will be returned.
|
||
pub fn find_preceding_boundary_point(
|
||
buffer_snapshot: &MultiBufferSnapshot,
|
||
from: Point,
|
||
find_range: FindRange,
|
||
mut is_boundary: impl FnMut(char, char) -> bool,
|
||
) -> Point {
|
||
let mut prev_ch = None;
|
||
let mut offset = from.to_offset(buffer_snapshot);
|
||
|
||
for ch in buffer_snapshot.reversed_chars_at(offset) {
|
||
if find_range == FindRange::SingleLine && ch == '\n' {
|
||
break;
|
||
}
|
||
if let Some(prev_ch) = prev_ch
|
||
&& is_boundary(ch, prev_ch) {
|
||
break;
|
||
}
|
||
|
||
offset -= ch.len_utf8();
|
||
prev_ch = Some(ch);
|
||
}
|
||
|
||
offset.to_point(buffer_snapshot)
|
||
}
|
||
|
||
/// Scans for a boundary preceding the given start point `from` until a boundary is found,
|
||
/// indicated by the given predicate returning true.
|
||
/// The predicate is called with the character to the left and right of the candidate boundary location.
|
||
/// If FindRange::SingleLine is specified and no boundary is found before the start of the current line, the start of the current line will be returned.
|
||
pub fn find_preceding_boundary_display_point(
|
||
map: &DisplaySnapshot,
|
||
from: DisplayPoint,
|
||
find_range: FindRange,
|
||
is_boundary: impl FnMut(char, char) -> bool,
|
||
) -> DisplayPoint {
|
||
let result = find_preceding_boundary_point(
|
||
&map.buffer_snapshot,
|
||
from.to_point(map),
|
||
find_range,
|
||
is_boundary,
|
||
);
|
||
map.clip_point(result.to_display_point(map), Bias::Left)
|
||
}
|
||
|
||
/// Scans for a boundary following the given start point until a boundary is found, indicated by the
|
||
/// given predicate returning true. The predicate is called with the character to the left and right
|
||
/// of the candidate boundary location, and will be called with `\n` characters indicating the start
|
||
/// or end of a line. The function supports optionally returning the point just before the boundary
|
||
/// is found via return_point_before_boundary.
|
||
pub fn find_boundary_point(
|
||
map: &DisplaySnapshot,
|
||
from: DisplayPoint,
|
||
find_range: FindRange,
|
||
mut is_boundary: impl FnMut(char, char) -> bool,
|
||
return_point_before_boundary: bool,
|
||
) -> DisplayPoint {
|
||
let mut offset = from.to_offset(map, Bias::Right);
|
||
let mut prev_offset = offset;
|
||
let mut prev_ch = None;
|
||
|
||
for ch in map.buffer_snapshot.chars_at(offset) {
|
||
if find_range == FindRange::SingleLine && ch == '\n' {
|
||
break;
|
||
}
|
||
if let Some(prev_ch) = prev_ch
|
||
&& is_boundary(prev_ch, ch) {
|
||
if return_point_before_boundary {
|
||
return map.clip_point(prev_offset.to_display_point(map), Bias::Right);
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
prev_offset = offset;
|
||
offset += ch.len_utf8();
|
||
prev_ch = Some(ch);
|
||
}
|
||
map.clip_point(offset.to_display_point(map), Bias::Right)
|
||
}
|
||
|
||
pub fn find_preceding_boundary_trail(
|
||
map: &DisplaySnapshot,
|
||
head: DisplayPoint,
|
||
mut is_boundary: impl FnMut(char, char) -> bool,
|
||
) -> (Option<DisplayPoint>, DisplayPoint) {
|
||
let mut offset = head.to_offset(map, Bias::Left);
|
||
let mut trail_offset = None;
|
||
|
||
let mut prev_ch = map.buffer_snapshot.chars_at(offset).next();
|
||
let mut forward = map.buffer_snapshot.reversed_chars_at(offset).peekable();
|
||
|
||
// Skip newlines
|
||
while let Some(&ch) = forward.peek() {
|
||
if ch == '\n' {
|
||
prev_ch = forward.next();
|
||
offset -= ch.len_utf8();
|
||
trail_offset = Some(offset);
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
|
||
// Find the boundary
|
||
let start_offset = offset;
|
||
for ch in forward {
|
||
if let Some(prev_ch) = prev_ch
|
||
&& is_boundary(prev_ch, ch) {
|
||
if start_offset == offset {
|
||
trail_offset = Some(offset);
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
offset -= ch.len_utf8();
|
||
prev_ch = Some(ch);
|
||
}
|
||
|
||
let trail = trail_offset
|
||
.map(|trail_offset: usize| map.clip_point(trail_offset.to_display_point(map), Bias::Left));
|
||
|
||
(
|
||
trail,
|
||
map.clip_point(offset.to_display_point(map), Bias::Left),
|
||
)
|
||
}
|
||
|
||
/// Finds the location of a boundary
|
||
pub fn find_boundary_trail(
|
||
map: &DisplaySnapshot,
|
||
head: DisplayPoint,
|
||
mut is_boundary: impl FnMut(char, char) -> bool,
|
||
) -> (Option<DisplayPoint>, DisplayPoint) {
|
||
let mut offset = head.to_offset(map, Bias::Right);
|
||
let mut trail_offset = None;
|
||
|
||
let mut prev_ch = map.buffer_snapshot.reversed_chars_at(offset).next();
|
||
let mut forward = map.buffer_snapshot.chars_at(offset).peekable();
|
||
|
||
// Skip newlines
|
||
while let Some(&ch) = forward.peek() {
|
||
if ch == '\n' {
|
||
prev_ch = forward.next();
|
||
offset += ch.len_utf8();
|
||
trail_offset = Some(offset);
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
|
||
// Find the boundary
|
||
let start_offset = offset;
|
||
for ch in forward {
|
||
if let Some(prev_ch) = prev_ch
|
||
&& is_boundary(prev_ch, ch) {
|
||
if start_offset == offset {
|
||
trail_offset = Some(offset);
|
||
} else {
|
||
break;
|
||
}
|
||
}
|
||
offset += ch.len_utf8();
|
||
prev_ch = Some(ch);
|
||
}
|
||
|
||
let trail = trail_offset
|
||
.map(|trail_offset: usize| map.clip_point(trail_offset.to_display_point(map), Bias::Right));
|
||
|
||
(
|
||
trail,
|
||
map.clip_point(offset.to_display_point(map), Bias::Right),
|
||
)
|
||
}
|
||
|
||
pub fn find_boundary(
|
||
map: &DisplaySnapshot,
|
||
from: DisplayPoint,
|
||
find_range: FindRange,
|
||
is_boundary: impl FnMut(char, char) -> bool,
|
||
) -> DisplayPoint {
|
||
find_boundary_point(map, from, find_range, is_boundary, false)
|
||
}
|
||
|
||
pub fn find_boundary_exclusive(
|
||
map: &DisplaySnapshot,
|
||
from: DisplayPoint,
|
||
find_range: FindRange,
|
||
is_boundary: impl FnMut(char, char) -> bool,
|
||
) -> DisplayPoint {
|
||
find_boundary_point(map, from, find_range, is_boundary, true)
|
||
}
|
||
|
||
/// Returns an iterator over the characters following a given offset in the [`DisplaySnapshot`].
|
||
/// The returned value also contains a range of the start/end of a returned character in
|
||
/// the [`DisplaySnapshot`]. The offsets are relative to the start of a buffer.
|
||
pub fn chars_after(
|
||
map: &DisplaySnapshot,
|
||
mut offset: usize,
|
||
) -> impl Iterator<Item = (char, Range<usize>)> + '_ {
|
||
map.buffer_snapshot.chars_at(offset).map(move |ch| {
|
||
let before = offset;
|
||
offset += ch.len_utf8();
|
||
(ch, before..offset)
|
||
})
|
||
}
|
||
|
||
/// Returns a reverse iterator over the characters following a given offset in the [`DisplaySnapshot`].
|
||
/// The returned value also contains a range of the start/end of a returned character in
|
||
/// the [`DisplaySnapshot`]. The offsets are relative to the start of a buffer.
|
||
pub fn chars_before(
|
||
map: &DisplaySnapshot,
|
||
mut offset: usize,
|
||
) -> impl Iterator<Item = (char, Range<usize>)> + '_ {
|
||
map.buffer_snapshot
|
||
.reversed_chars_at(offset)
|
||
.map(move |ch| {
|
||
let after = offset;
|
||
offset -= ch.len_utf8();
|
||
(ch, offset..after)
|
||
})
|
||
}
|
||
|
||
/// Returns a list of lines (represented as a [`DisplayPoint`] range) contained
|
||
/// within a passed range.
|
||
///
|
||
/// The line ranges are **always* going to be in bounds of a requested range, which means that
|
||
/// the first and the last lines might not necessarily represent the
|
||
/// full range of a logical line (as their `.start`/`.end` values are clipped to those of a passed in range).
|
||
pub fn split_display_range_by_lines(
|
||
map: &DisplaySnapshot,
|
||
range: Range<DisplayPoint>,
|
||
) -> Vec<Range<DisplayPoint>> {
|
||
let mut result = Vec::new();
|
||
|
||
let mut start = range.start;
|
||
// Loop over all the covered rows until the one containing the range end
|
||
for row in range.start.row().0..range.end.row().0 {
|
||
let row_end_column = map.line_len(DisplayRow(row));
|
||
let end = map.clip_point(
|
||
DisplayPoint::new(DisplayRow(row), row_end_column),
|
||
Bias::Left,
|
||
);
|
||
if start != end {
|
||
result.push(start..end);
|
||
}
|
||
start = map.clip_point(DisplayPoint::new(DisplayRow(row + 1), 0), Bias::Left);
|
||
}
|
||
|
||
// Add the final range from the start of the last end to the original range end.
|
||
result.push(start..range.end);
|
||
|
||
result
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
use crate::{
|
||
Buffer, DisplayMap, DisplayRow, ExcerptRange, FoldPlaceholder, MultiBuffer,
|
||
display_map::Inlay,
|
||
test::{editor_test_context::EditorTestContext, marked_display_snapshot},
|
||
};
|
||
use gpui::{AppContext as _, font, px};
|
||
use language::Capability;
|
||
use project::{Project, project_settings::DiagnosticSeverity};
|
||
use settings::SettingsStore;
|
||
use util::post_inc;
|
||
|
||
#[gpui::test]
|
||
fn test_previous_word_start(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
fn assert(marked_text: &str, cx: &mut gpui::App) {
|
||
let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
|
||
let actual = previous_word_start(&snapshot, display_points[1]);
|
||
let expected = display_points[0];
|
||
if actual != expected {
|
||
eprintln!(
|
||
"previous_word_start mismatch for '{}': actual={:?}, expected={:?}",
|
||
marked_text, actual, expected
|
||
);
|
||
}
|
||
assert_eq!(actual, expected);
|
||
}
|
||
|
||
assert("\nˇ ˇlorem", cx);
|
||
assert("ˇ\nˇ lorem", cx);
|
||
assert(" ˇloremˇ", cx);
|
||
assert("ˇ ˇlorem", cx);
|
||
assert(" ˇlorˇem", cx);
|
||
assert("\nlorem\nˇ ˇipsum", cx);
|
||
assert("\n\nˇ\nˇ", cx);
|
||
assert(" ˇlorem ˇipsum", cx);
|
||
assert("ˇlorem-ˇipsum", cx);
|
||
assert("loremˇ-#$@ˇipsum", cx);
|
||
assert("ˇlorem_ˇipsum", cx);
|
||
assert(" ˇdefγˇ", cx);
|
||
assert(" ˇbcΔˇ", cx);
|
||
// Test punctuation skipping behavior
|
||
assert("ˇhello.ˇ", cx);
|
||
assert("helloˇ...ˇ", cx);
|
||
assert("helloˇ.---..ˇtest", cx);
|
||
assert("test ˇ.--ˇtest", cx);
|
||
assert("oneˇ,;:!?ˇtwo", cx);
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_previous_subword_start(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
fn assert(marked_text: &str, cx: &mut gpui::App) {
|
||
let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
|
||
assert_eq!(
|
||
previous_subword_start(&snapshot, display_points[1]),
|
||
display_points[0]
|
||
);
|
||
}
|
||
|
||
// Subword boundaries are respected
|
||
assert("lorem_ˇipˇsum", cx);
|
||
assert("lorem_ˇipsumˇ", cx);
|
||
assert("ˇlorem_ˇipsum", cx);
|
||
assert("lorem_ˇipsum_ˇdolor", cx);
|
||
assert("loremˇIpˇsum", cx);
|
||
assert("loremˇIpsumˇ", cx);
|
||
|
||
// Word boundaries are still respected
|
||
assert("\nˇ ˇlorem", cx);
|
||
assert(" ˇloremˇ", cx);
|
||
assert(" ˇlorˇem", cx);
|
||
assert("\nlorem\nˇ ˇipsum", cx);
|
||
assert("\n\nˇ\nˇ", cx);
|
||
assert(" ˇlorem ˇipsum", cx);
|
||
assert("loremˇ-ˇipsum", cx);
|
||
assert("loremˇ-#$@ˇipsum", cx);
|
||
assert(" ˇdefγˇ", cx);
|
||
assert(" bcˇΔˇ", cx);
|
||
assert(" ˇbcδˇ", cx);
|
||
assert(" abˇ——ˇcd", cx);
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_find_preceding_boundary(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
fn assert(
|
||
marked_text: &str,
|
||
cx: &mut gpui::App,
|
||
is_boundary: impl FnMut(char, char) -> bool,
|
||
) {
|
||
let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
|
||
assert_eq!(
|
||
find_preceding_boundary_display_point(
|
||
&snapshot,
|
||
display_points[1],
|
||
FindRange::MultiLine,
|
||
is_boundary
|
||
),
|
||
display_points[0]
|
||
);
|
||
}
|
||
|
||
assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
|
||
left == 'c' && right == 'd'
|
||
});
|
||
assert("abcdef\nˇgh\nijˇk", cx, |left, right| {
|
||
left == '\n' && right == 'g'
|
||
});
|
||
let mut line_count = 0;
|
||
assert("abcdef\nˇgh\nijˇk", cx, |left, _| {
|
||
if left == '\n' {
|
||
line_count += 1;
|
||
line_count == 2
|
||
} else {
|
||
false
|
||
}
|
||
});
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_find_preceding_boundary_with_inlays(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
let input_text = "abcdefghijklmnopqrstuvwxys";
|
||
let font = font("Helvetica");
|
||
let font_size = px(14.0);
|
||
let buffer = MultiBuffer::build_simple(input_text, cx);
|
||
let buffer_snapshot = buffer.read(cx).snapshot(cx);
|
||
|
||
let display_map = cx.new(|cx| {
|
||
DisplayMap::new(
|
||
buffer,
|
||
font,
|
||
font_size,
|
||
None,
|
||
1,
|
||
1,
|
||
FoldPlaceholder::test(),
|
||
DiagnosticSeverity::Warning,
|
||
cx,
|
||
)
|
||
});
|
||
|
||
// add all kinds of inlays between two word boundaries: we should be able to cross them all, when looking for another boundary
|
||
let mut id = 0;
|
||
let inlays = (0..buffer_snapshot.len())
|
||
.flat_map(|offset| {
|
||
[
|
||
Inlay::edit_prediction(
|
||
post_inc(&mut id),
|
||
buffer_snapshot.anchor_at(offset, Bias::Left),
|
||
"test",
|
||
),
|
||
Inlay::edit_prediction(
|
||
post_inc(&mut id),
|
||
buffer_snapshot.anchor_at(offset, Bias::Right),
|
||
"test",
|
||
),
|
||
Inlay::mock_hint(
|
||
post_inc(&mut id),
|
||
buffer_snapshot.anchor_at(offset, Bias::Left),
|
||
"test",
|
||
),
|
||
Inlay::mock_hint(
|
||
post_inc(&mut id),
|
||
buffer_snapshot.anchor_at(offset, Bias::Right),
|
||
"test",
|
||
),
|
||
]
|
||
})
|
||
.collect();
|
||
let snapshot = display_map.update(cx, |map, cx| {
|
||
map.splice_inlays(&[], inlays, cx);
|
||
map.snapshot(cx)
|
||
});
|
||
|
||
assert_eq!(
|
||
find_preceding_boundary_display_point(
|
||
&snapshot,
|
||
buffer_snapshot.len().to_display_point(&snapshot),
|
||
FindRange::MultiLine,
|
||
|left, _| left == 'e',
|
||
),
|
||
snapshot
|
||
.buffer_snapshot
|
||
.offset_to_point(5)
|
||
.to_display_point(&snapshot),
|
||
"Should not stop at inlays when looking for boundaries"
|
||
);
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_next_word_end(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
fn assert(marked_text: &str, cx: &mut gpui::App) {
|
||
let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
|
||
let actual = next_word_end(&snapshot, display_points[0]);
|
||
let expected = display_points[1];
|
||
if actual != expected {
|
||
eprintln!(
|
||
"next_word_end mismatch for '{}': actual={:?}, expected={:?}",
|
||
marked_text, actual, expected
|
||
);
|
||
}
|
||
assert_eq!(actual, expected);
|
||
}
|
||
|
||
assert("\nˇ loremˇ", cx);
|
||
assert(" ˇloremˇ", cx);
|
||
assert(" lorˇemˇ", cx);
|
||
assert(" loremˇ ˇ\nipsum\n", cx);
|
||
assert("\nˇ\nˇ\n\n", cx);
|
||
assert("loremˇ ipsumˇ ", cx);
|
||
assert("loremˇ-ipsumˇ", cx);
|
||
assert("loremˇ#$@-ˇipsum", cx);
|
||
assert("loremˇ_ipsumˇ", cx);
|
||
assert(" ˇbcΔˇ", cx);
|
||
assert(" abˇ——ˇcd", cx);
|
||
// Test punctuation skipping behavior
|
||
assert("ˇ.helloˇ", cx);
|
||
assert("display_pointsˇ[0ˇ]", cx);
|
||
assert("ˇ...ˇhello", cx);
|
||
assert("helloˇ.---..ˇtest", cx);
|
||
assert("testˇ.--ˇ test", cx);
|
||
assert("oneˇ,;:!?ˇtwo", cx);
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_next_subword_end(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
fn assert(marked_text: &str, cx: &mut gpui::App) {
|
||
let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
|
||
assert_eq!(
|
||
next_subword_end(&snapshot, display_points[0]),
|
||
display_points[1]
|
||
);
|
||
}
|
||
|
||
// Subword boundaries are respected
|
||
assert("loˇremˇ_ipsum", cx);
|
||
assert("ˇloremˇ_ipsum", cx);
|
||
assert("loremˇ_ipsumˇ", cx);
|
||
assert("loremˇ_ipsumˇ_dolor", cx);
|
||
assert("loˇremˇIpsum", cx);
|
||
assert("loremˇIpsumˇDolor", cx);
|
||
|
||
// Word boundaries are still respected
|
||
assert("\nˇ loremˇ", cx);
|
||
assert(" ˇloremˇ", cx);
|
||
assert(" lorˇemˇ", cx);
|
||
assert(" loremˇ ˇ\nipsum\n", cx);
|
||
assert("\nˇ\nˇ\n\n", cx);
|
||
assert("loremˇ ipsumˇ ", cx);
|
||
assert("loremˇ-ˇipsum", cx);
|
||
assert("loremˇ#$@-ˇipsum", cx);
|
||
assert("loremˇ_ipsumˇ", cx);
|
||
assert(" ˇbcˇΔ", cx);
|
||
assert(" abˇ——ˇcd", cx);
|
||
}
|
||
|
||
#[gpui::test]
|
||
fn test_find_boundary(cx: &mut gpui::App) {
|
||
init_test(cx);
|
||
|
||
fn assert(
|
||
marked_text: &str,
|
||
cx: &mut gpui::App,
|
||
is_boundary: impl FnMut(char, char) -> bool,
|
||
) {
|
||
let (snapshot, display_points) = marked_display_snapshot(marked_text, cx);
|
||
assert_eq!(
|
||
find_boundary(
|
||
&snapshot,
|
||
display_points[0],
|
||
FindRange::MultiLine,
|
||
is_boundary,
|
||
),
|
||
display_points[1]
|
||
);
|
||
}
|
||
|
||
assert("abcˇdef\ngh\nijˇk", cx, |left, right| {
|
||
left == 'j' && right == 'k'
|
||
});
|
||
assert("abˇcdef\ngh\nˇijk", cx, |left, right| {
|
||
left == '\n' && right == 'i'
|
||
});
|
||
let mut line_count = 0;
|
||
assert("abcˇdef\ngh\nˇijk", cx, |left, _| {
|
||
if left == '\n' {
|
||
line_count += 1;
|
||
line_count == 2
|
||
} else {
|
||
false
|
||
}
|
||
});
|
||
}
|
||
|
||
#[gpui::test]
|
||
async fn test_move_up_and_down_with_excerpts(cx: &mut gpui::TestAppContext) {
|
||
cx.update(|cx| {
|
||
init_test(cx);
|
||
});
|
||
|
||
let mut cx = EditorTestContext::new(cx).await;
|
||
let editor = cx.editor.clone();
|
||
let window = cx.window;
|
||
_ = cx.update_window(window, |_, window, cx| {
|
||
let text_layout_details = editor.read(cx).text_layout_details(window);
|
||
|
||
let font = font("Helvetica");
|
||
|
||
let buffer = cx.new(|cx| Buffer::local("abc\ndefg\nhijkl\nmn", cx));
|
||
let multibuffer = cx.new(|cx| {
|
||
let mut multibuffer = MultiBuffer::new(Capability::ReadWrite);
|
||
multibuffer.push_excerpts(
|
||
buffer.clone(),
|
||
[
|
||
ExcerptRange::new(Point::new(0, 0)..Point::new(1, 4)),
|
||
ExcerptRange::new(Point::new(2, 0)..Point::new(3, 2)),
|
||
],
|
||
cx,
|
||
);
|
||
multibuffer
|
||
});
|
||
let display_map = cx.new(|cx| {
|
||
DisplayMap::new(
|
||
multibuffer,
|
||
font,
|
||
px(14.0),
|
||
None,
|
||
0,
|
||
1,
|
||
FoldPlaceholder::test(),
|
||
DiagnosticSeverity::Warning,
|
||
cx,
|
||
)
|
||
});
|
||
let snapshot = display_map.update(cx, |map, cx| map.snapshot(cx));
|
||
|
||
assert_eq!(snapshot.text(), "abc\ndefg\n\nhijkl\nmn");
|
||
|
||
let col_2_x = snapshot
|
||
.x_for_display_point(DisplayPoint::new(DisplayRow(0), 2), &text_layout_details);
|
||
|
||
// Can't move up into the first excerpt's header
|
||
assert_eq!(
|
||
up(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(0), 2),
|
||
SelectionGoal::HorizontalPosition(col_2_x.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(0), 0),
|
||
SelectionGoal::HorizontalPosition(col_2_x.0),
|
||
),
|
||
);
|
||
assert_eq!(
|
||
up(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(0), 0),
|
||
SelectionGoal::None,
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(0), 0),
|
||
SelectionGoal::HorizontalPosition(0.0),
|
||
),
|
||
);
|
||
|
||
let col_4_x = snapshot
|
||
.x_for_display_point(DisplayPoint::new(DisplayRow(1), 4), &text_layout_details);
|
||
|
||
// Move up and down within first excerpt
|
||
assert_eq!(
|
||
up(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(1), 4),
|
||
SelectionGoal::HorizontalPosition(col_4_x.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(0), 3),
|
||
SelectionGoal::HorizontalPosition(col_4_x.0)
|
||
),
|
||
);
|
||
assert_eq!(
|
||
down(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(0), 3),
|
||
SelectionGoal::HorizontalPosition(col_4_x.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(1), 4),
|
||
SelectionGoal::HorizontalPosition(col_4_x.0)
|
||
),
|
||
);
|
||
|
||
let col_5_x = snapshot
|
||
.x_for_display_point(DisplayPoint::new(DisplayRow(3), 5), &text_layout_details);
|
||
|
||
// Move up and down across second excerpt's header
|
||
assert_eq!(
|
||
up(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(3), 5),
|
||
SelectionGoal::HorizontalPosition(col_5_x.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(1), 4),
|
||
SelectionGoal::HorizontalPosition(col_5_x.0)
|
||
),
|
||
);
|
||
assert_eq!(
|
||
down(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(1), 4),
|
||
SelectionGoal::HorizontalPosition(col_5_x.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(3), 5),
|
||
SelectionGoal::HorizontalPosition(col_5_x.0)
|
||
),
|
||
);
|
||
|
||
let max_point_x = snapshot
|
||
.x_for_display_point(DisplayPoint::new(DisplayRow(4), 2), &text_layout_details);
|
||
|
||
// Can't move down off the end, and attempting to do so leaves the selection goal unchanged
|
||
assert_eq!(
|
||
down(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(4), 0),
|
||
SelectionGoal::HorizontalPosition(0.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(4), 2),
|
||
SelectionGoal::HorizontalPosition(0.0)
|
||
),
|
||
);
|
||
assert_eq!(
|
||
down(
|
||
&snapshot,
|
||
DisplayPoint::new(DisplayRow(4), 2),
|
||
SelectionGoal::HorizontalPosition(max_point_x.0),
|
||
false,
|
||
&text_layout_details
|
||
),
|
||
(
|
||
DisplayPoint::new(DisplayRow(4), 2),
|
||
SelectionGoal::HorizontalPosition(max_point_x.0)
|
||
),
|
||
);
|
||
});
|
||
}
|
||
|
||
fn init_test(cx: &mut gpui::App) {
|
||
let settings_store = SettingsStore::test(cx);
|
||
cx.set_global(settings_store);
|
||
workspace::init_settings(cx);
|
||
theme::init(theme::LoadThemes::JustBase, cx);
|
||
language::init(cx);
|
||
crate::init(cx);
|
||
Project::init_settings(cx);
|
||
}
|
||
}
|