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-rw-r--r--helix-core/src/movement.rs169
1 files changed, 39 insertions, 130 deletions
diff --git a/helix-core/src/movement.rs b/helix-core/src/movement.rs
index 8b1e802f..d0023e9f 100644
--- a/helix-core/src/movement.rs
+++ b/helix-core/src/movement.rs
@@ -3,9 +3,13 @@ use std::iter::{self, from_fn, Peekable, SkipWhile};
use ropey::iter::Chars;
use crate::{
- coords_at_pos,
+ chars::{
+ categorize_char, char_is_line_ending, char_is_punctuation, char_is_whitespace,
+ char_is_word, CharCategory,
+ },
+ coords_at_pos, get_line_ending,
graphemes::{nth_next_grapheme_boundary, nth_prev_grapheme_boundary},
- pos_at_coords, Position, Range, RopeSlice,
+ line_end_char_index, pos_at_coords, Position, Range, RopeSlice,
};
#[derive(Debug, Copy, Clone, PartialEq, Eq)]
@@ -37,9 +41,8 @@ pub fn move_horizontally(
nth_prev_grapheme_boundary(slice, pos, count).max(start)
}
Direction::Forward => {
- // Line end is pos at the start of next line - 1
- let end = slice.line_to_char(line + 1).saturating_sub(1);
- nth_next_grapheme_boundary(slice, pos, count).min(end)
+ let end_char_idx = line_end_char_index(&slice, line);
+ nth_next_grapheme_boundary(slice, pos, count).min(end_char_idx)
}
};
let anchor = match behaviour {
@@ -68,8 +71,11 @@ pub fn move_vertically(
),
};
- // convert to 0-indexed, subtract another 1 because len_chars() counts \n
- let new_line_len = slice.line(new_line).len_chars().saturating_sub(2);
+ // Length of the line sans line-ending.
+ let new_line_len = {
+ let line = slice.line(new_line);
+ line.len_chars() - get_line_ending(&line).map(|le| le.len_chars()).unwrap_or(0)
+ };
let new_col = std::cmp::min(horiz as usize, new_line_len);
@@ -104,64 +110,6 @@ fn word_move(slice: RopeSlice, mut range: Range, count: usize, target: WordMotio
}
// ---- util ------------
-#[inline]
-pub(crate) fn is_word(ch: char) -> bool {
- ch.is_alphanumeric() || ch == '_'
-}
-
-#[inline]
-pub(crate) fn is_end_of_line(ch: char) -> bool {
- ch == '\n'
-}
-
-#[inline]
-// Whitespace, but not end of line
-pub(crate) fn is_strict_whitespace(ch: char) -> bool {
- ch.is_whitespace() && !is_end_of_line(ch)
-}
-
-#[inline]
-pub(crate) fn is_punctuation(ch: char) -> bool {
- use unicode_general_category::{get_general_category, GeneralCategory};
-
- matches!(
- get_general_category(ch),
- GeneralCategory::OtherPunctuation
- | GeneralCategory::OpenPunctuation
- | GeneralCategory::ClosePunctuation
- | GeneralCategory::InitialPunctuation
- | GeneralCategory::FinalPunctuation
- | GeneralCategory::ConnectorPunctuation
- | GeneralCategory::DashPunctuation
- | GeneralCategory::MathSymbol
- | GeneralCategory::CurrencySymbol
- | GeneralCategory::ModifierSymbol
- )
-}
-
-#[derive(Debug, Eq, PartialEq)]
-pub enum Category {
- Whitespace,
- Eol,
- Word,
- Punctuation,
- Unknown,
-}
-
-#[inline]
-pub(crate) fn categorize(ch: char) -> Category {
- if is_end_of_line(ch) {
- Category::Eol
- } else if ch.is_whitespace() {
- Category::Whitespace
- } else if is_word(ch) {
- Category::Word
- } else if is_punctuation(ch) {
- Category::Punctuation
- } else {
- Category::Unknown
- }
-}
#[inline]
/// Returns first index that doesn't satisfy a given predicate when
@@ -235,7 +183,8 @@ impl CharHelpers for Chars<'_> {
let mut phase = WordMotionPhase::Start;
let mut head = origin.head;
let mut anchor: Option<usize> = None;
- let is_boundary = |a: char, b: Option<char>| categorize(a) != categorize(b.unwrap_or(a));
+ let is_boundary =
+ |a: char, b: Option<char>| categorize_char(a) != categorize_char(b.unwrap_or(a));
while let Some(peek) = characters.peek().copied() {
phase = match phase {
WordMotionPhase::Start => {
@@ -244,7 +193,8 @@ impl CharHelpers for Chars<'_> {
break; // We're at the end, so there's nothing to do.
}
// Anchor may remain here if the head wasn't at a boundary
- if !is_boundary(peek, characters.peek().copied()) && !is_end_of_line(peek) {
+ if !is_boundary(peek, characters.peek().copied()) && !char_is_line_ending(peek)
+ {
anchor = Some(head);
}
// First character is always skipped by the head
@@ -252,7 +202,7 @@ impl CharHelpers for Chars<'_> {
WordMotionPhase::SkipNewlines
}
WordMotionPhase::SkipNewlines => {
- if is_end_of_line(peek) {
+ if char_is_line_ending(peek) {
characters.next();
if characters.peek().is_some() {
advance(&mut head);
@@ -286,12 +236,12 @@ fn reached_target(target: WordMotionTarget, peek: char, next_peek: Option<&char>
match target {
WordMotionTarget::NextWordStart => {
- ((categorize(peek) != categorize(*next_peek))
- && (is_end_of_line(*next_peek) || !next_peek.is_whitespace()))
+ ((categorize_char(peek) != categorize_char(*next_peek))
+ && (char_is_line_ending(*next_peek) || !next_peek.is_whitespace()))
}
WordMotionTarget::NextWordEnd | WordMotionTarget::PrevWordStart => {
- ((categorize(peek) != categorize(*next_peek))
- && (!peek.is_whitespace() || is_end_of_line(*next_peek)))
+ ((categorize_char(peek) != categorize_char(*next_peek))
+ && (!peek.is_whitespace() || char_is_line_ending(*next_peek)))
}
}
}
@@ -330,7 +280,7 @@ mod test {
slice,
move_vertically(slice, range, Direction::Forward, 1, Movement::Move).head
),
- (1, 2).into()
+ (1, 3).into()
);
}
@@ -343,12 +293,12 @@ mod test {
let mut range = Range::point(position);
let moves_and_expected_coordinates = [
- ((Direction::Forward, 1usize), (0, 1)),
- ((Direction::Forward, 2usize), (0, 3)),
- ((Direction::Forward, 0usize), (0, 3)),
- ((Direction::Forward, 999usize), (0, 31)),
- ((Direction::Forward, 999usize), (0, 31)),
- ((Direction::Backward, 999usize), (0, 0)),
+ ((Direction::Forward, 1usize), (0, 1)), // T|his is a simple alphabetic line
+ ((Direction::Forward, 2usize), (0, 3)), // Thi|s is a simple alphabetic line
+ ((Direction::Forward, 0usize), (0, 3)), // Thi|s is a simple alphabetic line
+ ((Direction::Forward, 999usize), (0, 32)), // This is a simple alphabetic line|
+ ((Direction::Forward, 999usize), (0, 32)), // This is a simple alphabetic line|
+ ((Direction::Backward, 999usize), (0, 0)), // |This is a simple alphabetic line
];
for ((direction, amount), coordinates) in IntoIter::new(moves_and_expected_coordinates) {
@@ -366,15 +316,15 @@ mod test {
let mut range = Range::point(position);
let moves_and_expected_coordinates = IntoIter::new([
- ((Direction::Forward, 1usize), (0, 1)), // M_ltiline
- ((Direction::Forward, 2usize), (0, 3)), // Mul_iline
- ((Direction::Backward, 6usize), (0, 0)), // _ultiline
- ((Direction::Backward, 999usize), (0, 0)), // _ultiline
- ((Direction::Forward, 3usize), (0, 3)), // Mul_iline
- ((Direction::Forward, 0usize), (0, 3)), // Mul_iline
- ((Direction::Backward, 0usize), (0, 3)), // Mul_iline
- ((Direction::Forward, 999usize), (0, 9)), // Multilin_
- ((Direction::Forward, 999usize), (0, 9)), // Multilin_
+ ((Direction::Forward, 1usize), (0, 1)), // M|ultiline\n
+ ((Direction::Forward, 2usize), (0, 3)), // Mul|tiline\n
+ ((Direction::Backward, 6usize), (0, 0)), // |Multiline\n
+ ((Direction::Backward, 999usize), (0, 0)), // |Multiline\n
+ ((Direction::Forward, 3usize), (0, 3)), // Mul|tiline\n
+ ((Direction::Forward, 0usize), (0, 3)), // Mul|tiline\n
+ ((Direction::Backward, 0usize), (0, 3)), // Mul|tiline\n
+ ((Direction::Forward, 999usize), (0, 9)), // Multiline|\n
+ ((Direction::Forward, 999usize), (0, 9)), // Multiline|\n
]);
for ((direction, amount), coordinates) in moves_and_expected_coordinates {
@@ -446,7 +396,7 @@ mod test {
// First descent preserves column as the target line is wider
((Axis::V, Direction::Forward, 1usize), (1, 8)),
// Second descent clamps column as the target line is shorter
- ((Axis::V, Direction::Forward, 1usize), (2, 4)),
+ ((Axis::V, Direction::Forward, 1usize), (2, 5)),
// Third descent restores the original column
((Axis::V, Direction::Forward, 1usize), (3, 8)),
// Behaviour is preserved even through long jumps
@@ -760,45 +710,4 @@ mod test {
}
}
}
-
- #[test]
- fn test_categorize() {
- const WORD_TEST_CASE: &'static str =
- "_hello_world_あいうえおー1234567890１２３４５６７８９０";
- const PUNCTUATION_TEST_CASE: &'static str =
- "!\"#$%&\'()*+,-./:;<=>?@[\\]^`{|}~！”＃＄％＆’（）＊＋、。：；＜＝＞？＠「」＾｀｛｜｝～";
- const WHITESPACE_TEST_CASE: &'static str = "  　   ";
-
- assert_eq!(Category::Eol, categorize('\n'));
-
- for ch in WHITESPACE_TEST_CASE.chars() {
- assert_eq!(
- Category::Whitespace,
- categorize(ch),
- "Testing '{}', but got `{:?}` instead of `Category::Whitespace`",
- ch,
- categorize(ch)
- );
- }
-
- for ch in WORD_TEST_CASE.chars() {
- assert_eq!(
- Category::Word,
- categorize(ch),
- "Testing '{}', but got `{:?}` instead of `Category::Word`",
- ch,
- categorize(ch)
- );
- }
-
- for ch in PUNCTUATION_TEST_CASE.chars() {
- assert_eq!(
- Category::Punctuation,
- categorize(ch),
- "Testing '{}', but got `{:?}` instead of `Category::Punctuation`",
- ch,
- categorize(ch)
- );
- }
- }
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-16 07:59:41 +0000