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Add commands for movement by subwords (#8147)

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* Allow moving by subword
* Add tests for subword movement
pull/11234/head
Jefta 4 months ago committed by GitHub
parent 0929704699
commit 518425e055
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GPG Key ID: B5690EEEBB952194
2 changed files with 445 additions and 0 deletions
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405
helix-core/src/movement.rs
Unescape Escape View File

@ -197,13 +197,31 @@ pub fn move_prev_long_word_end(slice: RopeSlice, range: Range, count: usize) ->
word_move(slice, range, count, WordMotionTarget::PrevLongWordEnd)
}
pub fn move_next_sub_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
word_move(slice, range, count, WordMotionTarget::NextSubWordStart)
}
pub fn move_next_sub_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
word_move(slice, range, count, WordMotionTarget::NextSubWordEnd)
}
pub fn move_prev_sub_word_start(slice: RopeSlice, range: Range, count: usize) -> Range {
word_move(slice, range, count, WordMotionTarget::PrevSubWordStart)
}
pub fn move_prev_sub_word_end(slice: RopeSlice, range: Range, count: usize) -> Range {
word_move(slice, range, count, WordMotionTarget::PrevSubWordEnd)
}
fn word_move(slice: RopeSlice, range: Range, count: usize, target: WordMotionTarget) -> Range {
let is_prev = matches!(
target,
WordMotionTarget::PrevWordStart
| WordMotionTarget::PrevLongWordStart
| WordMotionTarget::PrevSubWordStart
| WordMotionTarget::PrevWordEnd
| WordMotionTarget::PrevLongWordEnd
| WordMotionTarget::PrevSubWordEnd
);
// Special-case early-out.
@ -383,6 +401,12 @@ pub enum WordMotionTarget {
NextLongWordEnd,
PrevLongWordStart,
PrevLongWordEnd,
// A sub word is similar to a regular word, except it is also delimited by
// underscores and transitions from lowercase to uppercase.
NextSubWordStart,
NextSubWordEnd,
PrevSubWordStart,
PrevSubWordEnd,
}
pub trait CharHelpers {
@ -398,8 +422,10 @@ impl CharHelpers for Chars<'_> {
target,
WordMotionTarget::PrevWordStart
| WordMotionTarget::PrevLongWordStart
| WordMotionTarget::PrevSubWordStart
| WordMotionTarget::PrevWordEnd
| WordMotionTarget::PrevLongWordEnd
| WordMotionTarget::PrevSubWordEnd
);
// Reverse the iterator if needed for the motion direction.
@ -476,6 +502,25 @@ fn is_long_word_boundary(a: char, b: char) -> bool {
}
}
fn is_sub_word_boundary(a: char, b: char, dir: Direction) -> bool {
match (categorize_char(a), categorize_char(b)) {
(CharCategory::Word, CharCategory::Word) => {
if (a == '_') != (b == '_') {
return true;
}
// Subword boundaries are directional: in 'fooBar', there is a
// boundary between 'o' and 'B', but not between 'B' and 'a'.
match dir {
Direction::Forward => a.is_lowercase() && b.is_uppercase(),
Direction::Backward => a.is_uppercase() && b.is_lowercase(),
}
}
(a, b) if a != b => true,
_ => false,
}
}
fn reached_target(target: WordMotionTarget, prev_ch: char, next_ch: char) -> bool {
match target {
WordMotionTarget::NextWordStart | WordMotionTarget::PrevWordEnd => {
@ -494,6 +539,22 @@ fn reached_target(target: WordMotionTarget, prev_ch: char, next_ch: char) -> boo
is_long_word_boundary(prev_ch, next_ch)
&& (!prev_ch.is_whitespace() || char_is_line_ending(next_ch))
}
WordMotionTarget::NextSubWordStart => {
is_sub_word_boundary(prev_ch, next_ch, Direction::Forward)
&& (char_is_line_ending(next_ch) || !(next_ch.is_whitespace() || next_ch == '_'))
}
WordMotionTarget::PrevSubWordEnd => {
is_sub_word_boundary(prev_ch, next_ch, Direction::Backward)
&& (char_is_line_ending(next_ch) || !(next_ch.is_whitespace() || next_ch == '_'))
}
WordMotionTarget::NextSubWordEnd => {
is_sub_word_boundary(prev_ch, next_ch, Direction::Forward)
&& (!(prev_ch.is_whitespace() || prev_ch == '_') || char_is_line_ending(next_ch))
}
WordMotionTarget::PrevSubWordStart => {
is_sub_word_boundary(prev_ch, next_ch, Direction::Backward)
&& (!(prev_ch.is_whitespace() || prev_ch == '_') || char_is_line_ending(next_ch))
}
}
}
@ -1012,6 +1073,178 @@ mod test {
}
}
#[test]
fn test_behaviour_when_moving_to_start_of_next_sub_words() {
let tests = [
(
"NextSubwordStart",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 11)),
],
),
(
"next_subword_start",
vec![
(1, Range::new(0, 0), Range::new(0, 5)),
(1, Range::new(4, 4), Range::new(5, 13)),
],
),
(
"Next_Subword_Start",
vec![
(1, Range::new(0, 0), Range::new(0, 5)),
(1, Range::new(4, 4), Range::new(5, 13)),
],
),
(
"NEXT_SUBWORD_START",
vec![
(1, Range::new(0, 0), Range::new(0, 5)),
(1, Range::new(4, 4), Range::new(5, 13)),
],
),
(
"next subword start",
vec![
(1, Range::new(0, 0), Range::new(0, 5)),
(1, Range::new(4, 4), Range::new(5, 13)),
],
),
(
"Next Subword Start",
vec![
(1, Range::new(0, 0), Range::new(0, 5)),
(1, Range::new(4, 4), Range::new(5, 13)),
],
),
(
"NEXT SUBWORD START",
vec![
(1, Range::new(0, 0), Range::new(0, 5)),
(1, Range::new(4, 4), Range::new(5, 13)),
],
),
(
"next__subword__start",
vec![
(1, Range::new(0, 0), Range::new(0, 6)),
(1, Range::new(4, 4), Range::new(4, 6)),
(1, Range::new(5, 5), Range::new(6, 15)),
],
),
(
"Next__Subword__Start",
vec![
(1, Range::new(0, 0), Range::new(0, 6)),
(1, Range::new(4, 4), Range::new(4, 6)),
(1, Range::new(5, 5), Range::new(6, 15)),
],
),
(
"NEXT__SUBWORD__START",
vec![
(1, Range::new(0, 0), Range::new(0, 6)),
(1, Range::new(4, 4), Range::new(4, 6)),
(1, Range::new(5, 5), Range::new(6, 15)),
],
),
];
for (sample, scenario) in tests {
for (count, begin, expected_end) in scenario.into_iter() {
let range = move_next_sub_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_sub_words() {
let tests = [
(
"NextSubwordEnd",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 11)),
],
),
(
"next subword end",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 12)),
],
),
(
"Next Subword End",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 12)),
],
),
(
"NEXT SUBWORD END",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 12)),
],
),
(
"next_subword_end",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 12)),
],
),
(
"Next_Subword_End",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 12)),
],
),
(
"NEXT_SUBWORD_END",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 12)),
],
),
(
"next__subword__end",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 13)),
(1, Range::new(5, 5), Range::new(5, 13)),
],
),
(
"Next__Subword__End",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 13)),
(1, Range::new(5, 5), Range::new(5, 13)),
],
),
(
"NEXT__SUBWORD__END",
vec![
(1, Range::new(0, 0), Range::new(0, 4)),
(1, Range::new(4, 4), Range::new(4, 13)),
(1, Range::new(5, 5), Range::new(5, 13)),
],
),
];
for (sample, scenario) in tests {
for (count, begin, expected_end) in scenario.into_iter() {
let range = move_next_sub_word_end(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 = [
@ -1181,6 +1414,92 @@ mod test {
}
}
#[test]
fn test_behaviour_when_moving_to_start_of_previous_sub_words() {
let tests = [
(
"PrevSubwordEnd",
vec![
(1, Range::new(13, 13), Range::new(14, 11)),
(1, Range::new(11, 11), Range::new(11, 4)),
],
),
(
"prev subword end",
vec![
(1, Range::new(15, 15), Range::new(16, 13)),
(1, Range::new(12, 12), Range::new(13, 5)),
],
),
(
"Prev Subword End",
vec![
(1, Range::new(15, 15), Range::new(16, 13)),
(1, Range::new(12, 12), Range::new(13, 5)),
],
),
(
"PREV SUBWORD END",
vec![
(1, Range::new(15, 15), Range::new(16, 13)),
(1, Range::new(12, 12), Range::new(13, 5)),
],
),
(
"prev_subword_end",
vec![
(1, Range::new(15, 15), Range::new(16, 13)),
(1, Range::new(12, 12), Range::new(13, 5)),
],
),
(
"Prev_Subword_End",
vec![
(1, Range::new(15, 15), Range::new(16, 13)),
(1, Range::new(12, 12), Range::new(13, 5)),
],
),
(
"PREV_SUBWORD_END",
vec![
(1, Range::new(15, 15), Range::new(16, 13)),
(1, Range::new(12, 12), Range::new(13, 5)),
],
),
(
"prev__subword__end",
vec![
(1, Range::new(17, 17), Range::new(18, 15)),
(1, Range::new(13, 13), Range::new(14, 6)),
(1, Range::new(14, 14), Range::new(15, 6)),
],
),
(
"Prev__Subword__End",
vec![
(1, Range::new(17, 17), Range::new(18, 15)),
(1, Range::new(13, 13), Range::new(14, 6)),
(1, Range::new(14, 14), Range::new(15, 6)),
],
),
(
"PREV__SUBWORD__END",
vec![
(1, Range::new(17, 17), Range::new(18, 15)),
(1, Range::new(13, 13), Range::new(14, 6)),
(1, Range::new(14, 14), Range::new(15, 6)),
],
),
];
for (sample, scenario) in tests {
for (count, begin, expected_end) in scenario.into_iter() {
let range = move_prev_sub_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 = [
@ -1444,6 +1763,92 @@ mod test {
}
}
#[test]
fn test_behaviour_when_moving_to_end_of_previous_sub_words() {
let tests = [
(
"PrevSubwordEnd",
vec![
(1, Range::new(13, 13), Range::new(14, 11)),
(1, Range::new(11, 11), Range::new(11, 4)),
],
),
(
"prev subword end",
vec![
(1, Range::new(15, 15), Range::new(16, 12)),
(1, Range::new(12, 12), Range::new(12, 4)),
],
),
(
"Prev Subword End",
vec![
(1, Range::new(15, 15), Range::new(16, 12)),
(1, Range::new(12, 12), Range::new(12, 4)),
],
),
(
"PREV SUBWORD END",
vec![
(1, Range::new(15, 15), Range::new(16, 12)),
(1, Range::new(12, 12), Range::new(12, 4)),
],
),
(
"prev_subword_end",
vec![
(1, Range::new(15, 15), Range::new(16, 12)),
(1, Range::new(12, 12), Range::new(12, 4)),
],
),
(
"Prev_Subword_End",
vec![
(1, Range::new(15, 15), Range::new(16, 12)),
(1, Range::new(12, 12), Range::new(12, 4)),
],
),
(
"PREV_SUBWORD_END",
vec![
(1, Range::new(15, 15), Range::new(16, 12)),
(1, Range::new(12, 12), Range::new(12, 4)),
],
),
(
"prev__subword__end",
vec![
(1, Range::new(17, 17), Range::new(18, 13)),
(1, Range::new(13, 13), Range::new(13, 4)),
(1, Range::new(14, 14), Range::new(15, 13)),
],
),
(
"Prev__Subword__End",
vec![
(1, Range::new(17, 17), Range::new(18, 13)),
(1, Range::new(13, 13), Range::new(13, 4)),
(1, Range::new(14, 14), Range::new(15, 13)),
],
),
(
"PREV__SUBWORD__END",
vec![
(1, Range::new(17, 17), Range::new(18, 13)),
(1, Range::new(13, 13), Range::new(13, 4)),
(1, Range::new(14, 14), Range::new(15, 13)),
],
),
];
for (sample, scenario) in tests {
for (count, begin, expected_end) in scenario.into_iter() {
let range = move_prev_sub_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 = [

40
helix-term/src/commands.rs
Unescape Escape View File

@ -269,6 +269,10 @@ impl MappableCommand {
move_prev_long_word_start, "Move to start of previous long word",
move_next_long_word_end, "Move to end of next long word",
move_prev_long_word_end, "Move to end of previous long word",
move_next_sub_word_start, "Move to start of next sub word",
move_prev_sub_word_start, "Move to start of previous sub word",
move_next_sub_word_end, "Move to end of next sub word",
move_prev_sub_word_end, "Move to end of previous sub word",
move_parent_node_end, "Move to end of the parent node",
move_parent_node_start, "Move to beginning of the parent node",
extend_next_word_start, "Extend to start of next word",
@ -279,6 +283,10 @@ impl MappableCommand {
extend_prev_long_word_start, "Extend to start of previous long word",
extend_next_long_word_end, "Extend to end of next long word",
extend_prev_long_word_end, "Extend to end of prev long word",
extend_next_sub_word_start, "Extend to start of next sub word",
extend_prev_sub_word_start, "Extend to start of previous sub word",
extend_next_sub_word_end, "Extend to end of next sub word",
extend_prev_sub_word_end, "Extend to end of prev sub word",
extend_parent_node_end, "Extend to end of the parent node",
extend_parent_node_start, "Extend to beginning of the parent node",
find_till_char, "Move till next occurrence of char",
@ -1126,6 +1134,22 @@ fn move_next_long_word_end(cx: &mut Context) {
move_word_impl(cx, movement::move_next_long_word_end)
}
fn move_next_sub_word_start(cx: &mut Context) {
move_word_impl(cx, movement::move_next_sub_word_start)
}
fn move_prev_sub_word_start(cx: &mut Context) {
move_word_impl(cx, movement::move_prev_sub_word_start)
}
fn move_prev_sub_word_end(cx: &mut Context) {
move_word_impl(cx, movement::move_prev_sub_word_end)
}
fn move_next_sub_word_end(cx: &mut Context) {
move_word_impl(cx, movement::move_next_sub_word_end)
}
fn goto_para_impl<F>(cx: &mut Context, move_fn: F)
where
F: Fn(RopeSlice, Range, usize, Movement) -> Range + 'static,
@ -1362,6 +1386,22 @@ fn extend_next_long_word_end(cx: &mut Context) {
extend_word_impl(cx, movement::move_next_long_word_end)
}
fn extend_next_sub_word_start(cx: &mut Context) {
extend_word_impl(cx, movement::move_next_sub_word_start)
}
fn extend_prev_sub_word_start(cx: &mut Context) {
extend_word_impl(cx, movement::move_prev_sub_word_start)
}
fn extend_prev_sub_word_end(cx: &mut Context) {
extend_word_impl(cx, movement::move_prev_sub_word_end)
}
fn extend_next_sub_word_end(cx: &mut Context) {
extend_word_impl(cx, movement::move_next_sub_word_end)
}
/// Separate branch to find_char designed only for `<ret>` char.
//
// This is necessary because the one document can have different line endings inside. And we

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