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-rw-r--r--helix-core/src/movement.rs18
-rw-r--r--helix-core/src/position.rs89
2 files changed, 57 insertions, 50 deletions
diff --git a/helix-core/src/movement.rs b/helix-core/src/movement.rs
index 01bec47a..7f3a5ef4 100644
--- a/helix-core/src/movement.rs
+++ b/helix-core/src/movement.rs
@@ -521,16 +521,14 @@ mod test {
V,
}
let moves_and_expected_coordinates = IntoIter::new([
- // Places cursor at the fourth kana (each of which are double-wide,
- // so the visual column is 8).
- ((Axis::H, Direction::Forward, 4), (0, 8)),
- // Descent places cursor at the 8th character.
- ((Axis::V, Direction::Forward, 1usize), (1, 8)),
- // Moving back a single-width character.
- ((Axis::H, Direction::Backward, 1usize), (1, 7)),
- // Jumping back up into the middle of a double-width character shifts
- // the column to the start of that character.
- ((Axis::V, Direction::Backward, 1usize), (0, 6)),
+ // Places cursor at the fourth kana.
+ ((Axis::H, Direction::Forward, 4), (0, 4)),
+ // Descent places cursor at the 4th character.
+ ((Axis::V, Direction::Forward, 1usize), (1, 4)),
+ // Moving back 1 character.
+ ((Axis::H, Direction::Backward, 1usize), (1, 3)),
+ // Jumping back up 1 line.
+ ((Axis::V, Direction::Backward, 1usize), (0, 3)),
]);
for ((axis, direction, amount), coordinates) in moves_and_expected_coordinates {
diff --git a/helix-core/src/position.rs b/helix-core/src/position.rs
index 15627687..611e6b76 100644
--- a/helix-core/src/position.rs
+++ b/helix-core/src/position.rs
@@ -1,8 +1,6 @@
-use std::borrow::Cow;
-
use crate::{
chars::char_is_line_ending,
- graphemes::{ensure_grapheme_boundary_prev, grapheme_width, RopeGraphemes},
+ graphemes::{ensure_grapheme_boundary_prev, RopeGraphemes},
line_ending::line_end_char_index,
RopeSlice,
};
@@ -66,12 +64,7 @@ pub fn coords_at_pos(text: RopeSlice, pos: usize) -> Position {
let line_start = text.line_to_char(line);
let pos = ensure_grapheme_boundary_prev(text, pos);
- let col = RopeGraphemes::new(text.slice(line_start..pos))
- .map(|g| {
- let g: Cow<str> = g.into();
- grapheme_width(&g)
- })
- .sum();
+ let col = RopeGraphemes::new(text.slice(line_start..pos)).count();
Position::new(line, col)
}
@@ -83,6 +76,9 @@ pub fn coords_at_pos(text: RopeSlice, pos: usize) -> Position {
/// `false` corresponds to properly round-tripping with `coords_at_pos()`,
/// whereas `true` will ensure that block cursors don't jump off the
/// end of the line.
+///
+/// TODO: this should be changed to work in terms of visual row/column, not
+/// graphemes.
pub fn pos_at_coords(text: RopeSlice, coords: Position, is_1_width: bool) -> usize {
let Position { row, col } = coords;
let line_start = text.line_to_char(row);
@@ -92,17 +88,11 @@ pub fn pos_at_coords(text: RopeSlice, coords: Position, is_1_width: bool) -> usi
text.line_to_char((row + 1).min(text.len_lines()))
};
- let mut prev_col = 0;
let mut col_char_offset = 0;
- for g in RopeGraphemes::new(text.slice(line_start..line_end)) {
- let g: Cow<str> = g.into();
- let next_col = prev_col + grapheme_width(&g);
-
- if next_col > col {
+ for (i, g) in RopeGraphemes::new(text.slice(line_start..line_end)).enumerate() {
+ if i == col {
break;
}
-
- prev_col = next_col;
col_char_offset += g.chars().count();
}
@@ -131,17 +121,18 @@ mod test {
assert_eq!(coords_at_pos(slice, 10), (1, 4).into()); // position on d
// Test with wide characters.
+ // TODO: account for character width.
let text = Rope::from("今日はいい\n");
let slice = text.slice(..);
assert_eq!(coords_at_pos(slice, 0), (0, 0).into());
- assert_eq!(coords_at_pos(slice, 1), (0, 2).into());
- assert_eq!(coords_at_pos(slice, 2), (0, 4).into());
- assert_eq!(coords_at_pos(slice, 3), (0, 6).into());
- assert_eq!(coords_at_pos(slice, 4), (0, 8).into());
- assert_eq!(coords_at_pos(slice, 5), (0, 10).into());
+ assert_eq!(coords_at_pos(slice, 1), (0, 1).into());
+ assert_eq!(coords_at_pos(slice, 2), (0, 2).into());
+ assert_eq!(coords_at_pos(slice, 3), (0, 3).into());
+ assert_eq!(coords_at_pos(slice, 4), (0, 4).into());
+ assert_eq!(coords_at_pos(slice, 5), (0, 5).into());
assert_eq!(coords_at_pos(slice, 6), (1, 0).into());
- // test with grapheme clusters
+ // Test with grapheme clusters.
let text = Rope::from("a̐éö̲\r\n");
let slice = text.slice(..);
assert_eq!(coords_at_pos(slice, 0), (0, 0).into());
@@ -150,13 +141,23 @@ mod test {
assert_eq!(coords_at_pos(slice, 7), (0, 3).into());
assert_eq!(coords_at_pos(slice, 9), (1, 0).into());
+ // Test with wide-character grapheme clusters.
+ // TODO: account for character width.
let text = Rope::from("किमपि\n");
let slice = text.slice(..);
assert_eq!(coords_at_pos(slice, 0), (0, 0).into());
- assert_eq!(coords_at_pos(slice, 2), (0, 2).into());
- assert_eq!(coords_at_pos(slice, 3), (0, 3).into());
- assert_eq!(coords_at_pos(slice, 5), (0, 5).into());
+ assert_eq!(coords_at_pos(slice, 2), (0, 1).into());
+ assert_eq!(coords_at_pos(slice, 3), (0, 2).into());
+ assert_eq!(coords_at_pos(slice, 5), (0, 3).into());
assert_eq!(coords_at_pos(slice, 6), (1, 0).into());
+
+ // Test with tabs.
+ // Todo: account for tab stops.
+ let text = Rope::from("\tHello\n");
+ let slice = text.slice(..);
+ assert_eq!(coords_at_pos(slice, 0), (0, 0).into());
+ assert_eq!(coords_at_pos(slice, 1), (0, 1).into());
+ assert_eq!(coords_at_pos(slice, 2), (0, 2).into());
}
#[test]
@@ -172,21 +173,20 @@ mod test {
assert_eq!(pos_at_coords(slice, (1, 4).into(), false), 10); // position on d
// Test with wide characters.
+ // TODO: account for character width.
let text = Rope::from("今日はいい\n");
let slice = text.slice(..);
assert_eq!(pos_at_coords(slice, (0, 0).into(), false), 0);
- assert_eq!(pos_at_coords(slice, (0, 1).into(), false), 0);
- assert_eq!(pos_at_coords(slice, (0, 2).into(), false), 1);
- assert_eq!(pos_at_coords(slice, (0, 3).into(), false), 1);
- assert_eq!(pos_at_coords(slice, (0, 4).into(), false), 2);
- assert_eq!(pos_at_coords(slice, (0, 6).into(), false), 3);
- assert_eq!(pos_at_coords(slice, (0, 8).into(), false), 4);
- assert_eq!(pos_at_coords(slice, (0, 10).into(), false), 5);
- assert_eq!(pos_at_coords(slice, (0, 11).into(), false), 6);
- assert_eq!(pos_at_coords(slice, (0, 11).into(), true), 5);
+ assert_eq!(pos_at_coords(slice, (0, 1).into(), false), 1);
+ assert_eq!(pos_at_coords(slice, (0, 2).into(), false), 2);
+ assert_eq!(pos_at_coords(slice, (0, 3).into(), false), 3);
+ assert_eq!(pos_at_coords(slice, (0, 4).into(), false), 4);
+ assert_eq!(pos_at_coords(slice, (0, 5).into(), false), 5);
+ assert_eq!(pos_at_coords(slice, (0, 6).into(), false), 6);
+ assert_eq!(pos_at_coords(slice, (0, 6).into(), true), 5);
assert_eq!(pos_at_coords(slice, (1, 0).into(), false), 6);
- // test with grapheme clusters
+ // Test with grapheme clusters.
let text = Rope::from("a̐éö̲\r\n");
let slice = text.slice(..);
assert_eq!(pos_at_coords(slice, (0, 0).into(), false), 0);
@@ -197,15 +197,24 @@ mod test {
assert_eq!(pos_at_coords(slice, (0, 4).into(), true), 7);
assert_eq!(pos_at_coords(slice, (1, 0).into(), false), 9);
+ // Test with wide-character grapheme clusters.
+ // TODO: account for character width.
let text = Rope::from("किमपि");
// 2 - 1 - 2 codepoints
// TODO: delete handling as per https://news.ycombinator.com/item?id=20058454
let slice = text.slice(..);
assert_eq!(pos_at_coords(slice, (0, 0).into(), false), 0);
- assert_eq!(pos_at_coords(slice, (0, 1).into(), false), 0);
+ assert_eq!(pos_at_coords(slice, (0, 1).into(), false), 2);
+ assert_eq!(pos_at_coords(slice, (0, 2).into(), false), 3);
+ assert_eq!(pos_at_coords(slice, (0, 3).into(), false), 5);
+ assert_eq!(pos_at_coords(slice, (0, 3).into(), true), 5);
+
+ // Test with tabs.
+ // Todo: account for tab stops.
+ let text = Rope::from("\tHello\n");
+ let slice = text.slice(..);
+ assert_eq!(pos_at_coords(slice, (0, 0).into(), false), 0);
+ assert_eq!(pos_at_coords(slice, (0, 1).into(), false), 1);
assert_eq!(pos_at_coords(slice, (0, 2).into(), false), 2);
- assert_eq!(pos_at_coords(slice, (0, 3).into(), false), 3);
- assert_eq!(pos_at_coords(slice, (0, 4).into(), false), 3);
- assert_eq!(pos_at_coords(slice, (0, 5).into(), false), 5); // eol
}
}