1130 lines
47 KiB
Rust
1130 lines
47 KiB
Rust
use std::iter;
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use ropey::iter::Chars;
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use crate::{
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chars::{categorize_char, char_is_line_ending, CharCategory},
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coords_at_pos,
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graphemes::{
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next_grapheme_boundary, nth_next_grapheme_boundary, nth_prev_grapheme_boundary,
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prev_grapheme_boundary,
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},
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pos_at_coords, Position, Range, RopeSlice,
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};
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#[derive(Debug, Copy, Clone, PartialEq, Eq)]
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pub enum Direction {
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Forward,
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Backward,
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}
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#[derive(Copy, Clone, PartialEq, Eq)]
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pub enum Movement {
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Extend,
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Move,
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}
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pub fn move_horizontally(
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slice: RopeSlice,
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range: Range,
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dir: Direction,
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count: usize,
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behaviour: Movement,
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) -> Range {
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let pos = range.cursor(slice);
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// Compute the new position.
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let new_pos = match dir {
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Direction::Forward => nth_next_grapheme_boundary(slice, pos, count),
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Direction::Backward => nth_prev_grapheme_boundary(slice, pos, count),
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};
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// Compute the final new range.
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range.put_cursor(slice, new_pos, behaviour == Movement::Extend)
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}
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pub fn move_vertically(
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slice: RopeSlice,
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range: Range,
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dir: Direction,
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count: usize,
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behaviour: Movement,
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) -> Range {
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let pos = range.cursor(slice);
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// Compute the current position's 2d coordinates.
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// TODO: switch this to use `visual_coords_at_pos` rather than
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// `coords_at_pos` as this will cause a jerky movement when the visual
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// position does not match, like moving from a line with tabs/CJK to
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// a line without
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let Position { row, col } = coords_at_pos(slice, pos);
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let horiz = range.horiz.unwrap_or(col as u32);
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// Compute the new position.
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let new_row = match dir {
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Direction::Forward => (row + count).min(slice.len_lines().saturating_sub(1)),
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Direction::Backward => row.saturating_sub(count),
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};
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let new_col = col.max(horiz as usize);
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let new_pos = pos_at_coords(slice, Position::new(new_row, new_col), true);
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// Special-case to avoid moving to the end of the last non-empty line.
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if behaviour == Movement::Extend && slice.line(new_row).len_chars() == 0 {
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return range;
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}
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let mut new_range = range.put_cursor(slice, new_pos, behaviour == Movement::Extend);
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new_range.horiz = Some(horiz);
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new_range
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}
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pub fn move_next_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::NextWordStart)
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}
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pub fn move_next_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::NextWordEnd)
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}
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pub fn move_prev_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::PrevWordStart)
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}
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pub fn move_next_long_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::NextLongWordStart)
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}
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pub fn move_next_long_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::NextLongWordEnd)
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}
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pub fn move_prev_long_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::PrevLongWordStart)
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}
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pub fn move_prev_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
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word_move(slice, range, count, WordMotionTarget::PrevWordEnd)
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}
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fn word_move(slice: RopeSlice, range: Range, count: usize, target: WordMotionTarget) -> Range {
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let is_prev = matches!(
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target,
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WordMotionTarget::PrevWordStart
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| WordMotionTarget::PrevLongWordStart
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| WordMotionTarget::PrevWordEnd
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);
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// Special-case early-out.
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if (is_prev && range.head == 0) || (!is_prev && range.head == slice.len_chars()) {
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return range;
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}
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// Prepare the range appropriately based on the target movement
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// direction. This is addressing two things at once:
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//
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// 1. Block-cursor semantics.
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// 2. The anchor position being irrelevant to the output result.
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#[allow(clippy::collapsible_else_if)] // Makes the structure clearer in this case.
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let start_range = if is_prev {
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if range.anchor < range.head {
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Range::new(range.head, prev_grapheme_boundary(slice, range.head))
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} else {
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Range::new(next_grapheme_boundary(slice, range.head), range.head)
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}
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} else {
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if range.anchor < range.head {
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Range::new(prev_grapheme_boundary(slice, range.head), range.head)
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} else {
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Range::new(range.head, next_grapheme_boundary(slice, range.head))
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}
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};
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// Do the main work.
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(0..count).fold(start_range, |r, _| {
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slice.chars_at(r.head).range_to_target(target, r)
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})
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}
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// ---- util ------------
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#[inline]
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/// Returns first index that doesn't satisfy a given predicate when
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/// advancing the character index.
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///
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/// Returns none if all characters satisfy the predicate.
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pub fn skip_while<F>(slice: RopeSlice, pos: usize, fun: F) -> Option<usize>
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where
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F: Fn(char) -> bool,
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{
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let mut chars = slice.chars_at(pos).enumerate();
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chars.find_map(|(i, c)| if !fun(c) { Some(pos + i) } else { None })
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}
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#[inline]
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/// Returns first index that doesn't satisfy a given predicate when
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/// retreating the character index, saturating if all elements satisfy
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/// the condition.
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pub fn backwards_skip_while<F>(slice: RopeSlice, pos: usize, fun: F) -> Option<usize>
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where
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F: Fn(char) -> bool,
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{
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let mut chars_starting_from_next = slice.chars_at(pos);
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let mut backwards = iter::from_fn(|| chars_starting_from_next.prev()).enumerate();
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backwards.find_map(|(i, c)| {
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if !fun(c) {
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Some(pos.saturating_sub(i))
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} else {
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None
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}
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})
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}
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/// Possible targets of a word motion
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#[derive(Copy, Clone, Debug)]
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pub enum WordMotionTarget {
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NextWordStart,
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NextWordEnd,
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PrevWordStart,
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PrevWordEnd,
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// A "Long word" (also known as a WORD in vim/kakoune) is strictly
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// delimited by whitespace, and can consist of punctuation as well
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// as alphanumerics.
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NextLongWordStart,
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NextLongWordEnd,
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PrevLongWordStart,
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}
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pub trait CharHelpers {
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fn range_to_target(&mut self, target: WordMotionTarget, origin: Range) -> Range;
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}
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impl CharHelpers for Chars<'_> {
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/// Note: this only changes the anchor of the range if the head is effectively
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/// starting on a boundary (either directly or after skipping newline characters).
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/// Any other changes to the anchor should be handled by the calling code.
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fn range_to_target(&mut self, target: WordMotionTarget, origin: Range) -> Range {
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let is_prev = matches!(
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target,
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WordMotionTarget::PrevWordStart
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| WordMotionTarget::PrevLongWordStart
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| WordMotionTarget::PrevWordEnd
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);
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// Reverse the iterator if needed for the motion direction.
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if is_prev {
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self.reverse();
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}
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// Function to advance index in the appropriate motion direction.
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let advance: &dyn Fn(&mut usize) = if is_prev {
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&|idx| *idx = idx.saturating_sub(1)
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} else {
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&|idx| *idx += 1
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};
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// Initialize state variables.
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let mut anchor = origin.anchor;
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let mut head = origin.head;
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let mut prev_ch = {
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let ch = self.prev();
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if ch.is_some() {
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self.next();
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}
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ch
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};
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// Skip any initial newline characters.
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while let Some(ch) = self.next() {
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if char_is_line_ending(ch) {
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prev_ch = Some(ch);
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advance(&mut head);
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} else {
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self.prev();
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break;
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}
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}
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if prev_ch.map(char_is_line_ending).unwrap_or(false) {
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anchor = head;
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}
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// Find our target position(s).
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let head_start = head;
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#[allow(clippy::while_let_on_iterator)] // Clippy's suggestion to fix doesn't work here.
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while let Some(next_ch) = self.next() {
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if prev_ch.is_none() || reached_target(target, prev_ch.unwrap(), next_ch) {
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if head == head_start {
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anchor = head;
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} else {
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break;
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}
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}
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prev_ch = Some(next_ch);
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advance(&mut head);
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}
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// Un-reverse the iterator if needed.
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if is_prev {
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self.reverse();
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}
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Range::new(anchor, head)
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}
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}
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fn is_word_boundary(a: char, b: char) -> bool {
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categorize_char(a) != categorize_char(b)
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}
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fn is_long_word_boundary(a: char, b: char) -> bool {
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match (categorize_char(a), categorize_char(b)) {
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(CharCategory::Word, CharCategory::Punctuation)
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| (CharCategory::Punctuation, CharCategory::Word) => false,
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(a, b) if a != b => true,
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_ => false,
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}
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}
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fn reached_target(target: WordMotionTarget, prev_ch: char, next_ch: char) -> bool {
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match target {
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WordMotionTarget::NextWordStart | WordMotionTarget::PrevWordEnd => {
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is_word_boundary(prev_ch, next_ch)
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&& (char_is_line_ending(next_ch) || !next_ch.is_whitespace())
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}
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WordMotionTarget::NextWordEnd | WordMotionTarget::PrevWordStart => {
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is_word_boundary(prev_ch, next_ch)
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&& (!prev_ch.is_whitespace() || char_is_line_ending(next_ch))
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}
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WordMotionTarget::NextLongWordStart => {
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is_long_word_boundary(prev_ch, next_ch)
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&& (char_is_line_ending(next_ch) || !next_ch.is_whitespace())
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}
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WordMotionTarget::NextLongWordEnd | WordMotionTarget::PrevLongWordStart => {
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is_long_word_boundary(prev_ch, next_ch)
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&& (!prev_ch.is_whitespace() || char_is_line_ending(next_ch))
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}
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}
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}
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#[cfg(test)]
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mod test {
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use std::array::{self, IntoIter};
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use ropey::Rope;
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use super::*;
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const SINGLE_LINE_SAMPLE: &str = "This is a simple alphabetic line";
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const MULTILINE_SAMPLE: &str = "\
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Multiline\n\
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text sample\n\
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which\n\
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is merely alphabetic\n\
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and whitespaced\n\
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";
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const MULTIBYTE_CHARACTER_SAMPLE: &str = "\
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パーティーへ行かないか\n\
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The text above is Japanese\n\
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";
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#[test]
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fn test_vertical_move() {
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let text = Rope::from("abcd\nefg\nwrs");
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let slice = text.slice(..);
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let pos = pos_at_coords(slice, (0, 4).into(), true);
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let range = Range::new(pos, pos);
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assert_eq!(
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coords_at_pos(
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slice,
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move_vertically(slice, range, Direction::Forward, 1, Movement::Move).head
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),
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(1, 3).into()
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);
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}
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#[test]
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fn horizontal_moves_through_single_line_text() {
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let text = Rope::from(SINGLE_LINE_SAMPLE);
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let slice = text.slice(..);
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let position = pos_at_coords(slice, (0, 0).into(), true);
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let mut range = Range::point(position);
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let moves_and_expected_coordinates = [
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((Direction::Forward, 1usize), (0, 1)), // T|his is a simple alphabetic line
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((Direction::Forward, 2usize), (0, 3)), // Thi|s is a simple alphabetic line
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((Direction::Forward, 0usize), (0, 3)), // Thi|s is a simple alphabetic line
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((Direction::Forward, 999usize), (0, 32)), // This is a simple alphabetic line|
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((Direction::Forward, 999usize), (0, 32)), // This is a simple alphabetic line|
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((Direction::Backward, 999usize), (0, 0)), // |This is a simple alphabetic line
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];
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for ((direction, amount), coordinates) in IntoIter::new(moves_and_expected_coordinates) {
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range = move_horizontally(slice, range, direction, amount, Movement::Move);
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assert_eq!(coords_at_pos(slice, range.head), coordinates.into())
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}
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}
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#[test]
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fn horizontal_moves_through_multiline_text() {
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let text = Rope::from(MULTILINE_SAMPLE);
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let slice = text.slice(..);
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let position = pos_at_coords(slice, (0, 0).into(), true);
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let mut range = Range::point(position);
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let moves_and_expected_coordinates = IntoIter::new([
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((Direction::Forward, 11usize), (1, 1)), // Multiline\nt|ext sample\n...
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((Direction::Backward, 1usize), (1, 0)), // Multiline\n|text sample\n...
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((Direction::Backward, 5usize), (0, 5)), // Multi|line\ntext sample\n...
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((Direction::Backward, 999usize), (0, 0)), // |Multiline\ntext sample\n...
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((Direction::Forward, 3usize), (0, 3)), // Mul|tiline\ntext sample\n...
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((Direction::Forward, 0usize), (0, 3)), // Mul|tiline\ntext sample\n...
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((Direction::Backward, 0usize), (0, 3)), // Mul|tiline\ntext sample\n...
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((Direction::Forward, 999usize), (5, 0)), // ...and whitespaced\n|
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((Direction::Forward, 999usize), (5, 0)), // ...and whitespaced\n|
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]);
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for ((direction, amount), coordinates) in moves_and_expected_coordinates {
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range = move_horizontally(slice, range, direction, amount, Movement::Move);
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assert_eq!(coords_at_pos(slice, range.head), coordinates.into());
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assert_eq!(range.head, range.anchor);
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}
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}
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#[test]
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fn selection_extending_moves_in_single_line_text() {
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let text = Rope::from(SINGLE_LINE_SAMPLE);
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let slice = text.slice(..);
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let position = pos_at_coords(slice, (0, 0).into(), true);
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let mut range = Range::point(position);
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let original_anchor = range.anchor;
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let moves = IntoIter::new([
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(Direction::Forward, 1usize),
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(Direction::Forward, 5usize),
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(Direction::Backward, 3usize),
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]);
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for (direction, amount) in moves {
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range = move_horizontally(slice, range, direction, amount, Movement::Extend);
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assert_eq!(range.anchor, original_anchor);
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}
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}
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#[test]
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fn vertical_moves_in_single_column() {
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let text = Rope::from(MULTILINE_SAMPLE);
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let slice = text.slice(..);
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let position = pos_at_coords(slice, (0, 0).into(), true);
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let mut range = Range::point(position);
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let moves_and_expected_coordinates = IntoIter::new([
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((Direction::Forward, 1usize), (1, 0)),
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((Direction::Forward, 2usize), (3, 0)),
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((Direction::Forward, 1usize), (4, 0)),
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((Direction::Backward, 999usize), (0, 0)),
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((Direction::Forward, 4usize), (4, 0)),
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((Direction::Forward, 0usize), (4, 0)),
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((Direction::Backward, 0usize), (4, 0)),
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((Direction::Forward, 5), (5, 0)),
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((Direction::Forward, 999usize), (5, 0)),
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]);
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for ((direction, amount), coordinates) in moves_and_expected_coordinates {
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range = move_vertically(slice, range, direction, amount, Movement::Move);
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assert_eq!(coords_at_pos(slice, range.head), coordinates.into());
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assert_eq!(range.head, range.anchor);
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}
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}
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#[test]
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fn vertical_moves_jumping_column() {
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let text = Rope::from(MULTILINE_SAMPLE);
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let slice = text.slice(..);
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let position = pos_at_coords(slice, (0, 0).into(), true);
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let mut range = Range::point(position);
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enum Axis {
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H,
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V,
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}
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let moves_and_expected_coordinates = IntoIter::new([
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// Places cursor at the end of line
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((Axis::H, Direction::Forward, 8usize), (0, 8)),
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// First descent preserves column as the target line is wider
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((Axis::V, Direction::Forward, 1usize), (1, 8)),
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// Second descent clamps column as the target line is shorter
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((Axis::V, Direction::Forward, 1usize), (2, 5)),
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// Third descent restores the original column
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((Axis::V, Direction::Forward, 1usize), (3, 8)),
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// Behaviour is preserved even through long jumps
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((Axis::V, Direction::Backward, 999usize), (0, 8)),
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((Axis::V, Direction::Forward, 4usize), (4, 8)),
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((Axis::V, Direction::Forward, 999usize), (5, 0)),
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]);
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for ((axis, direction, amount), coordinates) in moves_and_expected_coordinates {
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range = match axis {
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Axis::H => move_horizontally(slice, range, direction, amount, Movement::Move),
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Axis::V => move_vertically(slice, range, direction, amount, Movement::Move),
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};
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assert_eq!(coords_at_pos(slice, range.head), coordinates.into());
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assert_eq!(range.head, range.anchor);
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}
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}
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#[test]
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fn multibyte_character_wide_column_jumps() {
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let text = Rope::from(MULTIBYTE_CHARACTER_SAMPLE);
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let slice = text.slice(..);
|
|
let position = pos_at_coords(slice, (0, 0).into(), true);
|
|
let mut range = Range::point(position);
|
|
|
|
// FIXME: The behaviour captured in this test diverges from both Kakoune and Vim. These
|
|
// will attempt to preserve the horizontal position of the cursor, rather than
|
|
// placing it at the same character index.
|
|
enum Axis {
|
|
H,
|
|
V,
|
|
}
|
|
let moves_and_expected_coordinates = IntoIter::new([
|
|
// 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 {
|
|
range = match axis {
|
|
Axis::H => move_horizontally(slice, range, direction, amount, Movement::Move),
|
|
Axis::V => move_vertically(slice, range, direction, amount, Movement::Move),
|
|
};
|
|
assert_eq!(coords_at_pos(slice, range.head), coordinates.into());
|
|
assert_eq!(range.head, range.anchor);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn nonsensical_ranges_panic_on_forward_movement_attempt_in_debug_mode() {
|
|
move_next_word_start(Rope::from("Sample").slice(..), Range::point(99999999), 1);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn nonsensical_ranges_panic_on_forward_to_end_movement_attempt_in_debug_mode() {
|
|
move_next_word_end(Rope::from("Sample").slice(..), Range::point(99999999), 1);
|
|
}
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn nonsensical_ranges_panic_on_backwards_movement_attempt_in_debug_mode() {
|
|
move_prev_word_start(Rope::from("Sample").slice(..), Range::point(99999999), 1);
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_start_of_next_words() {
|
|
let tests = array::IntoIter::new([
|
|
("Basic forward motion stops at the first space",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 6))]),
|
|
(" Starting from a boundary advances the anchor",
|
|
vec![(1, Range::new(0, 0), Range::new(1, 10))]),
|
|
("Long whitespace gap is bridged by the head",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 11))]),
|
|
("Previous anchor is irrelevant for forward motions",
|
|
vec![(1, Range::new(12, 0), Range::new(0, 9))]),
|
|
(" Starting from whitespace moves to last space in sequence",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 4))]),
|
|
("Starting from mid-word leaves anchor at start position and moves head",
|
|
vec![(1, Range::new(3, 3), Range::new(3, 9))]),
|
|
("Identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 29))]),
|
|
("Jumping\n into starting whitespace selects the spaces before 'into'",
|
|
vec![(1, Range::new(0, 7), Range::new(8, 12))]),
|
|
("alphanumeric.!,and.?=punctuation are considered 'words' for the purposes of word motion",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 12)),
|
|
(1, Range::new(0, 12), Range::new(12, 15)),
|
|
(1, Range::new(12, 15), Range::new(15, 18))
|
|
]),
|
|
("... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 6)),
|
|
(1, Range::new(0, 6), Range::new(6, 10)),
|
|
]),
|
|
(".._.._ punctuation is not joined by underscores into a single block",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 2))]),
|
|
("Newlines\n\nare bridged seamlessly.",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 8)),
|
|
(1, Range::new(0, 8), Range::new(10, 14)),
|
|
]),
|
|
("Jumping\n\n\n\n\n\n from newlines to whitespace selects whitespace.",
|
|
vec![
|
|
(1, Range::new(0, 9), Range::new(13, 16)),
|
|
]),
|
|
("A failed motion does not modify the range",
|
|
vec![
|
|
(3, Range::new(37, 41), Range::new(37, 41)),
|
|
]),
|
|
("oh oh oh two character words!",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 3)),
|
|
(1, Range::new(0, 3), Range::new(3, 6)),
|
|
(1, Range::new(0, 2), Range::new(1, 3)),
|
|
]),
|
|
("Multiple motions at once resolve correctly",
|
|
vec![
|
|
(3, Range::new(0, 0), Range::new(17, 20)),
|
|
]),
|
|
("Excessive motions are performed partially",
|
|
vec![
|
|
(999, Range::new(0, 0), Range::new(32, 41)),
|
|
]),
|
|
("", // Edge case of moving forward in empty string
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 0)),
|
|
]),
|
|
("\n\n\n\n\n", // Edge case of moving forward in all newlines
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(5, 5)),
|
|
]),
|
|
("\n \n \n Jumping through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(1, 4)),
|
|
(1, Range::new(1, 4), Range::new(5, 8)),
|
|
]),
|
|
("ヒーリクス multibyte characters behave as normal characters",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 6)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_next_word_start(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_start_of_next_long_words() {
|
|
let tests = array::IntoIter::new([
|
|
("Basic forward motion stops at the first space",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 6))]),
|
|
(" Starting from a boundary advances the anchor",
|
|
vec![(1, Range::new(0, 0), Range::new(1, 10))]),
|
|
("Long whitespace gap is bridged by the head",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 11))]),
|
|
("Previous anchor is irrelevant for forward motions",
|
|
vec![(1, Range::new(12, 0), Range::new(0, 9))]),
|
|
(" Starting from whitespace moves to last space in sequence",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 4))]),
|
|
("Starting from mid-word leaves anchor at start position and moves head",
|
|
vec![(1, Range::new(3, 3), Range::new(3, 9))]),
|
|
("Identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 29))]),
|
|
("Jumping\n into starting whitespace selects the spaces before 'into'",
|
|
vec![(1, Range::new(0, 7), Range::new(8, 12))]),
|
|
("alphanumeric.!,and.?=punctuation are not treated any differently than alphanumerics",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 33)),
|
|
]),
|
|
("... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 6)),
|
|
(1, Range::new(0, 6), Range::new(6, 10)),
|
|
]),
|
|
(".._.._ punctuation is joined by underscores into a single word, as it behaves like alphanumerics",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 7))]),
|
|
("Newlines\n\nare bridged seamlessly.",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 8)),
|
|
(1, Range::new(0, 8), Range::new(10, 14)),
|
|
]),
|
|
("Jumping\n\n\n\n\n\n from newlines to whitespace selects whitespace.",
|
|
vec![
|
|
(1, Range::new(0, 9), Range::new(13, 16)),
|
|
]),
|
|
("A failed motion does not modify the range",
|
|
vec![
|
|
(3, Range::new(37, 41), Range::new(37, 41)),
|
|
]),
|
|
("oh oh oh two character words!",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 3)),
|
|
(1, Range::new(0, 3), Range::new(3, 6)),
|
|
(1, Range::new(0, 1), Range::new(0, 3)),
|
|
]),
|
|
("Multiple motions at once resolve correctly",
|
|
vec![
|
|
(3, Range::new(0, 0), Range::new(17, 20)),
|
|
]),
|
|
("Excessive motions are performed partially",
|
|
vec![
|
|
(999, Range::new(0, 0), Range::new(32, 41)),
|
|
]),
|
|
("", // Edge case of moving forward in empty string
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 0)),
|
|
]),
|
|
("\n\n\n\n\n", // Edge case of moving forward in all newlines
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(5, 5)),
|
|
]),
|
|
("\n \n \n Jumping through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(1, 4)),
|
|
(1, Range::new(1, 4), Range::new(5, 8)),
|
|
]),
|
|
("ヒー..リクス multibyte characters behave as normal characters, including their interaction with punctuation",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 8)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_next_long_word_start(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_start_of_previous_words() {
|
|
let tests = array::IntoIter::new([
|
|
("Basic backward motion from the middle of a word",
|
|
vec![(1, Range::new(3, 3), Range::new(4, 0))]),
|
|
|
|
// // Why do we want this behavior? The current behavior fails this
|
|
// // test, but seems better and more consistent.
|
|
// ("Starting from after boundary retreats the anchor",
|
|
// vec![(1, Range::new(0, 9), Range::new(8, 0))]),
|
|
|
|
(" Jump to start of a word preceded by whitespace",
|
|
vec![(1, Range::new(5, 5), Range::new(6, 4))]),
|
|
(" Jump to start of line from start of word preceded by whitespace",
|
|
vec![(1, Range::new(4, 4), Range::new(4, 0))]),
|
|
("Previous anchor is irrelevant for backward motions",
|
|
vec![(1, Range::new(12, 5), Range::new(6, 0))]),
|
|
(" Starting from whitespace moves to first space in sequence",
|
|
vec![(1, Range::new(0, 4), Range::new(4, 0))]),
|
|
("Identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 20), Range::new(20, 0))]),
|
|
("Jumping\n \nback through a newline selects whitespace",
|
|
vec![(1, Range::new(0, 13), Range::new(12, 8))]),
|
|
("Jumping to start of word from the end selects the word",
|
|
vec![(1, Range::new(6, 7), Range::new(7, 0))]),
|
|
("alphanumeric.!,and.?=punctuation are considered 'words' for the purposes of word motion",
|
|
vec![
|
|
(1, Range::new(29, 30), Range::new(30, 21)),
|
|
(1, Range::new(30, 21), Range::new(21, 18)),
|
|
(1, Range::new(21, 18), Range::new(18, 15))
|
|
]),
|
|
("... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 10), Range::new(10, 6)),
|
|
(1, Range::new(10, 6), Range::new(6, 0)),
|
|
]),
|
|
(".._.._ punctuation is not joined by underscores into a single block",
|
|
vec![(1, Range::new(0, 6), Range::new(5, 3))]),
|
|
("Newlines\n\nare bridged seamlessly.",
|
|
vec![
|
|
(1, Range::new(0, 10), Range::new(8, 0)),
|
|
]),
|
|
("Jumping \n\n\n\n\nback from within a newline group selects previous block",
|
|
vec![
|
|
(1, Range::new(0, 13), Range::new(11, 0)),
|
|
]),
|
|
("Failed motions do not modify the range",
|
|
vec![
|
|
(0, Range::new(3, 0), Range::new(3, 0)),
|
|
]),
|
|
("Multiple motions at once resolve correctly",
|
|
vec![
|
|
(3, Range::new(18, 18), Range::new(9, 0)),
|
|
]),
|
|
("Excessive motions are performed partially",
|
|
vec![
|
|
(999, Range::new(40, 40), Range::new(10, 0)),
|
|
]),
|
|
("", // Edge case of moving backwards in empty string
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 0)),
|
|
]),
|
|
("\n\n\n\n\n", // Edge case of moving backwards in all newlines
|
|
vec![
|
|
(1, Range::new(5, 5), Range::new(0, 0)),
|
|
]),
|
|
(" \n \nJumping back through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 8), Range::new(7, 4)),
|
|
(1, Range::new(7, 4), Range::new(3, 0)),
|
|
]),
|
|
("ヒーリクス multibyte characters behave as normal characters",
|
|
vec![
|
|
(1, Range::new(0, 6), Range::new(6, 0)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_prev_word_start(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_start_of_previous_long_words() {
|
|
let tests = array::IntoIter::new([
|
|
(
|
|
"Basic backward motion from the middle of a word",
|
|
vec![(1, Range::new(3, 3), Range::new(4, 0))],
|
|
),
|
|
|
|
// // Why do we want this behavior? The current behavior fails this
|
|
// // test, but seems better and more consistent.
|
|
// ("Starting from after boundary retreats the anchor",
|
|
// vec![(1, Range::new(0, 9), Range::new(8, 0))]),
|
|
|
|
(
|
|
" Jump to start of a word preceded by whitespace",
|
|
vec![(1, Range::new(5, 5), Range::new(6, 4))],
|
|
),
|
|
(
|
|
" Jump to start of line from start of word preceded by whitespace",
|
|
vec![(1, Range::new(3, 4), Range::new(4, 0))],
|
|
),
|
|
("Previous anchor is irrelevant for backward motions",
|
|
vec![(1, Range::new(12, 5), Range::new(6, 0))]),
|
|
(
|
|
" Starting from whitespace moves to first space in sequence",
|
|
vec![(1, Range::new(0, 4), Range::new(4, 0))],
|
|
),
|
|
("Identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 20), Range::new(20, 0))]),
|
|
(
|
|
"Jumping\n \nback through a newline selects whitespace",
|
|
vec![(1, Range::new(0, 13), Range::new(12, 8))],
|
|
),
|
|
(
|
|
"Jumping to start of word from the end selects the word",
|
|
vec![(1, Range::new(6, 7), Range::new(7, 0))],
|
|
),
|
|
(
|
|
"alphanumeric.!,and.?=punctuation are treated exactly the same",
|
|
vec![(1, Range::new(29, 30), Range::new(30, 0))],
|
|
),
|
|
(
|
|
"... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 10), Range::new(10, 6)),
|
|
(1, Range::new(10, 6), Range::new(6, 0)),
|
|
],
|
|
),
|
|
(".._.._ punctuation is joined by underscores into a single block",
|
|
vec![(1, Range::new(0, 6), Range::new(6, 0))]),
|
|
(
|
|
"Newlines\n\nare bridged seamlessly.",
|
|
vec![(1, Range::new(0, 10), Range::new(8, 0))],
|
|
),
|
|
(
|
|
"Jumping \n\n\n\n\nback from within a newline group selects previous block",
|
|
vec![(1, Range::new(0, 13), Range::new(11, 0))],
|
|
),
|
|
(
|
|
"Failed motions do not modify the range",
|
|
vec![(0, Range::new(3, 0), Range::new(3, 0))],
|
|
),
|
|
(
|
|
"Multiple motions at once resolve correctly",
|
|
vec![(3, Range::new(19, 19), Range::new(9, 0))],
|
|
),
|
|
(
|
|
"Excessive motions are performed partially",
|
|
vec![(999, Range::new(40, 40), Range::new(10, 0))],
|
|
),
|
|
(
|
|
"", // Edge case of moving backwards in empty string
|
|
vec![(1, Range::new(0, 0), Range::new(0, 0))],
|
|
),
|
|
(
|
|
"\n\n\n\n\n", // Edge case of moving backwards in all newlines
|
|
vec![(1, Range::new(5, 5), Range::new(0, 0))],
|
|
),
|
|
(" \n \nJumping back through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 8), Range::new(7, 4)),
|
|
(1, Range::new(7, 4), Range::new(3, 0)),
|
|
]),
|
|
("ヒーリ..クス multibyte characters behave as normal characters, including when interacting with punctuation",
|
|
vec![
|
|
(1, Range::new(0, 8), Range::new(8, 0)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_prev_long_word_start(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_end_of_next_words() {
|
|
let tests = array::IntoIter::new([
|
|
("Basic forward motion from the start of a word to the end of it",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 5))]),
|
|
("Basic forward motion from the end of a word to the end of the next",
|
|
vec![(1, Range::new(0, 5), Range::new(5, 13))]),
|
|
("Basic forward motion from the middle of a word to the end of it",
|
|
vec![(1, Range::new(2, 2), Range::new(2, 5))]),
|
|
(" Jumping to end of a word preceded by whitespace",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 11))]),
|
|
|
|
// // Why do we want this behavior? The current behavior fails this
|
|
// // test, but seems better and more consistent.
|
|
// (" Starting from a boundary advances the anchor",
|
|
// vec![(1, Range::new(0, 0), Range::new(1, 9))]),
|
|
|
|
("Previous anchor is irrelevant for end of word motion",
|
|
vec![(1, Range::new(12, 2), Range::new(2, 8))]),
|
|
("Identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 28))]),
|
|
("Jumping\n into starting whitespace selects up to the end of next word",
|
|
vec![(1, Range::new(0, 7), Range::new(8, 16))]),
|
|
("alphanumeric.!,and.?=punctuation are considered 'words' for the purposes of word motion",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 12)),
|
|
(1, Range::new(0, 12), Range::new(12, 15)),
|
|
(1, Range::new(12, 15), Range::new(15, 18))
|
|
]),
|
|
("... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 3)),
|
|
(1, Range::new(0, 3), Range::new(3, 9)),
|
|
]),
|
|
(".._.._ punctuation is not joined by underscores into a single block",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 2))]),
|
|
("Newlines\n\nare bridged seamlessly.",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 8)),
|
|
(1, Range::new(0, 8), Range::new(10, 13)),
|
|
]),
|
|
("Jumping\n\n\n\n\n\n from newlines to whitespace selects to end of next word.",
|
|
vec![
|
|
(1, Range::new(0, 8), Range::new(13, 20)),
|
|
]),
|
|
("A failed motion does not modify the range",
|
|
vec![
|
|
(3, Range::new(37, 41), Range::new(37, 41)),
|
|
]),
|
|
("Multiple motions at once resolve correctly",
|
|
vec![
|
|
(3, Range::new(0, 0), Range::new(16, 19)),
|
|
]),
|
|
("Excessive motions are performed partially",
|
|
vec![
|
|
(999, Range::new(0, 0), Range::new(31, 41)),
|
|
]),
|
|
("", // Edge case of moving forward in empty string
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 0)),
|
|
]),
|
|
("\n\n\n\n\n", // Edge case of moving forward in all newlines
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(5, 5)),
|
|
]),
|
|
("\n \n \n Jumping through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(1, 4)),
|
|
(1, Range::new(1, 4), Range::new(5, 8)),
|
|
]),
|
|
("ヒーリクス multibyte characters behave as normal characters",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 5)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_next_word_end(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_end_of_previous_words() {
|
|
let tests = array::IntoIter::new([
|
|
("Basic backward motion from the middle of a word",
|
|
vec![(1, Range::new(9, 9), Range::new(10, 5))]),
|
|
("Starting from after boundary retreats the anchor",
|
|
vec![(1, Range::new(0, 14), Range::new(13, 8))]),
|
|
("Jump to end of a word succeeded by whitespace",
|
|
vec![(1, Range::new(11, 11), Range::new(11, 4))]),
|
|
(" Jump to start of line from end of word preceded by whitespace",
|
|
vec![(1, Range::new(8, 8), Range::new(8, 0))]),
|
|
("Previous anchor is irrelevant for backward motions",
|
|
vec![(1, Range::new(26, 12), Range::new(13, 8))]),
|
|
(" Starting from whitespace moves to first space in sequence",
|
|
vec![(1, Range::new(0, 4), Range::new(4, 0))]),
|
|
("Test identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 25), Range::new(25, 4))]),
|
|
("Jumping\n \nback through a newline selects whitespace",
|
|
vec![(1, Range::new(0, 13), Range::new(12, 8))]),
|
|
("Jumping to start of word from the end selects the whole word",
|
|
vec![(1, Range::new(16, 16), Range::new(16, 10))]),
|
|
("alphanumeric.!,and.?=punctuation are considered 'words' for the purposes of word motion",
|
|
vec![
|
|
(1, Range::new(30, 30), Range::new(31, 21)),
|
|
(1, Range::new(31, 21), Range::new(21, 18)),
|
|
(1, Range::new(21, 18), Range::new(18, 15))
|
|
]),
|
|
|
|
("... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 10), Range::new(9, 3)),
|
|
(1, Range::new(9, 3), Range::new(3, 0)),
|
|
]),
|
|
(".._.._ punctuation is not joined by underscores into a single block",
|
|
vec![(1, Range::new(0, 5), Range::new(5, 3))]),
|
|
("Newlines\n\nare bridged seamlessly.",
|
|
vec![
|
|
(1, Range::new(0, 10), Range::new(8, 0)),
|
|
]),
|
|
("Jumping \n\n\n\n\nback from within a newline group selects previous block",
|
|
vec![
|
|
(1, Range::new(0, 13), Range::new(11, 7)),
|
|
]),
|
|
("Failed motions do not modify the range",
|
|
vec![
|
|
(0, Range::new(3, 0), Range::new(3, 0)),
|
|
]),
|
|
("Multiple motions at once resolve correctly",
|
|
vec![
|
|
(3, Range::new(24, 24), Range::new(16, 8)),
|
|
]),
|
|
("Excessive motions are performed partially",
|
|
vec![
|
|
(999, Range::new(40, 40), Range::new(9, 0)),
|
|
]),
|
|
("", // Edge case of moving backwards in empty string
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 0)),
|
|
]),
|
|
("\n\n\n\n\n", // Edge case of moving backwards in all newlines
|
|
vec![
|
|
(1, Range::new(5, 5), Range::new(0, 0)),
|
|
]),
|
|
(" \n \nJumping back through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 8), Range::new(7, 4)),
|
|
(1, Range::new(7, 4), Range::new(3, 0)),
|
|
]),
|
|
("Test ヒーリクス multibyte characters behave as normal characters",
|
|
vec![
|
|
(1, Range::new(0, 10), Range::new(10, 4)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_prev_word_end(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_behaviour_when_moving_to_end_of_next_long_words() {
|
|
let tests = array::IntoIter::new([
|
|
("Basic forward motion from the start of a word to the end of it",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 5))]),
|
|
("Basic forward motion from the end of a word to the end of the next",
|
|
vec![(1, Range::new(0, 5), Range::new(5, 13))]),
|
|
("Basic forward motion from the middle of a word to the end of it",
|
|
vec![(1, Range::new(2, 2), Range::new(2, 5))]),
|
|
(" Jumping to end of a word preceded by whitespace",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 11))]),
|
|
|
|
// // Why do we want this behavior? The current behavior fails this
|
|
// // test, but seems better and more consistent.
|
|
// (" Starting from a boundary advances the anchor",
|
|
// vec![(1, Range::new(0, 0), Range::new(1, 9))]),
|
|
|
|
("Previous anchor is irrelevant for end of word motion",
|
|
vec![(1, Range::new(12, 2), Range::new(2, 8))]),
|
|
("Identifiers_with_underscores are considered a single word",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 28))]),
|
|
("Jumping\n into starting whitespace selects up to the end of next word",
|
|
vec![(1, Range::new(0, 7), Range::new(8, 16))]),
|
|
("alphanumeric.!,and.?=punctuation are treated the same way",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 32)),
|
|
]),
|
|
("... ... punctuation and spaces behave as expected",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 3)),
|
|
(1, Range::new(0, 3), Range::new(3, 9)),
|
|
]),
|
|
(".._.._ punctuation is joined by underscores into a single block",
|
|
vec![(1, Range::new(0, 0), Range::new(0, 6))]),
|
|
("Newlines\n\nare bridged seamlessly.",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 8)),
|
|
(1, Range::new(0, 8), Range::new(10, 13)),
|
|
]),
|
|
("Jumping\n\n\n\n\n\n from newlines to whitespace selects to end of next word.",
|
|
vec![
|
|
(1, Range::new(0, 9), Range::new(13, 20)),
|
|
]),
|
|
("A failed motion does not modify the range",
|
|
vec![
|
|
(3, Range::new(37, 41), Range::new(37, 41)),
|
|
]),
|
|
("Multiple motions at once resolve correctly",
|
|
vec![
|
|
(3, Range::new(0, 0), Range::new(16, 19)),
|
|
]),
|
|
("Excessive motions are performed partially",
|
|
vec![
|
|
(999, Range::new(0, 0), Range::new(31, 41)),
|
|
]),
|
|
("", // Edge case of moving forward in empty string
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 0)),
|
|
]),
|
|
("\n\n\n\n\n", // Edge case of moving forward in all newlines
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(5, 5)),
|
|
]),
|
|
("\n \n \n Jumping through alternated space blocks and newlines selects the space blocks",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(1, 4)),
|
|
(1, Range::new(1, 4), Range::new(5, 8)),
|
|
]),
|
|
("ヒーリ..クス multibyte characters behave as normal characters, including when they interact with punctuation",
|
|
vec![
|
|
(1, Range::new(0, 0), Range::new(0, 7)),
|
|
]),
|
|
]);
|
|
|
|
for (sample, scenario) in tests {
|
|
for (count, begin, expected_end) in scenario.into_iter() {
|
|
let range = move_next_long_word_end(Rope::from(sample).slice(..), begin, count);
|
|
assert_eq!(range, expected_end, "Case failed: [{}]", sample);
|
|
}
|
|
}
|
|
}
|
|
}
|