diff options
Diffstat (limited to 'helix-core/src/movement.rs')
| -rw-r--r-- | helix-core/src/movement.rs | 166 |
1 files changed, 38 insertions, 128 deletions
diff --git a/helix-core/src/movement.rs b/helix-core/src/movement.rs index 8b1e802f..bfceb4ef 100644 --- a/helix-core/src/movement.rs +++ b/helix-core/src/movement.rs @@ -3,8 +3,13 @@ use std::iter::{self, from_fn, Peekable, SkipWhile}; use ropey::iter::Chars; use crate::{ + chars::{ + categorize_char, char_is_line_ending, char_is_punctuation, char_is_whitespace, + char_is_word, CharCategory, + }, coords_at_pos, graphemes::{nth_next_grapheme_boundary, nth_prev_grapheme_boundary}, + line_ending::{get_line_ending, line_end_char_index}, pos_at_coords, Position, Range, RopeSlice, }; @@ -37,9 +42,8 @@ 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 +72,11 @@ 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 +111,6 @@ 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 +184,8 @@ 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 +194,8 @@ 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 +203,7 @@ 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 +237,12 @@ 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 +281,7 @@ mod test { slice, move_vertically(slice, range, Direction::Forward, 1, Movement::Move).head ), - (1, 2).into() + (1, 3).into() ); } @@ -343,12 +294,12 @@ 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 +317,15 @@ 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 +397,7 @@ 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 +711,4 @@ 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) - ); - } - } } |