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refactor: move overlap check into find_nth_tag fn

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pull/12055/head
Nikita Revenco 1 week ago
parent 7f9e7611b6
commit d24677da62
2 changed files with 125 additions and 155 deletions
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222
helix-core/src/surround.rs
Unescape Escape View File

@ -313,34 +313,109 @@ pub fn get_surround_pos(
Ok(change_pos)
}
/// Find position of surrounding <tag>s around every cursor. Returns None
/// if any positions overlap. Note that the positions are in a flat Vec.
/// Use get_surround_pos().chunks(2) to get matching pairs of surround positions.
pub fn get_surround_pos_tag(
/// Test whether a character would be considered a valid character if it was used for either JSX, HTML or XML tags
/// JSX tags may have `.` in them for scoping
/// HTML tags may have `-` in them if it's a custom element
/// Both JSX and HTML tags may have `_`
fn is_valid_tagname_char(ch: char) -> bool {
ch.is_alphanumeric() || ch == '_' || ch == '-' || ch == '.'
}
/// Find the opening `<tag>` starting from `cursor_pos` and iterating until the beginning of the text.
/// Returns the Range of the tag's name (excluding the `<` and `>` characters.)
/// As well as the actual name of the tag
/// Additionally, it returns the last position where it stopped searching.
fn find_prev_tag(
text: RopeSlice,
selection: &Selection,
mut cursor_pos: usize,
skip: usize,
) -> Result<Vec<((Range, Range), String)>> {
let mut change_pos = vec![];
) -> Result<(Range, String, usize)> {
if cursor_pos == 0 || skip == 0 {
return Err(Error::RangeExceedsText);
}
for &range in selection {
let cursor_pos = range.cursor(text);
let mut chars = text.chars_at(cursor_pos);
let ((prev_tag, next_tag), tag_name) = find_nth_nearest_tag(text, cursor_pos, skip)?;
loop {
let prev_char = match chars.prev() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos -= 1;
let tag_change = ((prev_tag, next_tag), tag_name);
change_pos.push(tag_change);
}
if prev_char == '>' {
let mut possible_tag_name = String::new();
loop {
let current_char = match chars.prev() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos -= 1;
if current_char == '<' {
let tag_name = possible_tag_name
.chars()
.rev()
.take_while(|&ch| is_valid_tagname_char(ch))
.collect::<String>();
Ok(change_pos)
let range = Range::new(cursor_pos + 1, cursor_pos + tag_name.len() + 1);
return Ok((range, tag_name, cursor_pos));
}
possible_tag_name.push(current_char);
}
}
}
}
/// Test whether a character would be considered a valid character if it was used for either JSX, HTML or XML tags
/// JSX tags may have `.` in them for scoping
/// HTML tags may have `-` in them if it's a custom element
/// Both JSX and HTML tags may have `_`
fn is_valid_tagname_char(ch: char) -> bool {
ch.is_alphanumeric() || ch == '_' || ch == '-' || ch == '.'
/// Find the closing `</tag>` starting from `pos` and iterating the end of the text.
/// Returns the Range of the tag's name (excluding the `</` and `>` characters.)
/// As well as the actual name of the tag and where it last stopped searching.
fn find_next_tag(
text: RopeSlice,
mut cursor_pos: usize,
skip: usize,
) -> Result<(Range, String, usize)> {
if cursor_pos >= text.len_chars() || skip == 0 {
return Err(Error::RangeExceedsText);
}
let mut chars = text.chars_at(cursor_pos);
// look forward and find something that looks like a closing tag, e.g. <html> and extract it's name so we get "html"
loop {
let next_char = match chars.next() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos += 1;
if next_char == '<' {
let char_after_that = match chars.next() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos += 1;
if char_after_that == '/' {
let mut possible_tag_name = String::new();
loop {
let current_char = match chars.next() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos += 1;
if is_valid_tagname_char(current_char) {
possible_tag_name.push(current_char);
} else if current_char == '>' && possible_tag_name.len() != 0 {
let range =
Range::new(cursor_pos - possible_tag_name.len() - 1, cursor_pos - 1);
return Ok((range, possible_tag_name, cursor_pos));
} else {
break;
}
}
}
}
}
}
/// Get the two sorted `Range`s corresponding to nth matching tags surrounding the cursor, as well as the name of the tags.
@ -439,101 +514,36 @@ fn find_nth_nearest_tag(
}
}
/// Find the opening `<tag>` starting from `cursor_pos` and iterating until the beginning of the text.
/// Returns the Range of the tag's name (excluding the `<` and `>` characters.)
/// As well as the actual name of the tag
/// Additionally, it returns the last position where it stopped searching.
fn find_prev_tag(
/// Find position of surrounding <tag>s around every cursor as well as the tag's names.
/// Returns Err if any positions overlap. Note that the positions are in a flat Vec.
/// Use get_surround_pos().chunks(2) to get matching pairs of surround positions.
pub fn get_surround_pos_tag(
text: RopeSlice,
mut cursor_pos: usize,
selection: &Selection,
skip: usize,
) -> Result<(Range, String, usize)> {
if cursor_pos == 0 || skip == 0 {
return Err(Error::RangeExceedsText);
}
let mut chars = text.chars_at(cursor_pos);
loop {
let prev_char = match chars.prev() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos -= 1;
) -> Result<Vec<(Range, String)>> {
let mut change_pos = vec![];
if prev_char == '>' {
let mut possible_tag_name = String::new();
loop {
let current_char = match chars.prev() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos -= 1;
if current_char == '<' {
let tag_name = possible_tag_name
.chars()
.rev()
.take_while(|&ch| is_valid_tagname_char(ch))
.collect::<String>();
for &range in selection {
let cursor_pos = range.cursor(text);
let range = Range::new(cursor_pos + 1, cursor_pos + tag_name.len() + 1);
return Ok((range, tag_name, cursor_pos));
}
possible_tag_name.push(current_char);
}
}
}
}
let ((prev_tag, next_tag), tag_name) = find_nth_nearest_tag(text, cursor_pos, skip)?;
/// Find the closing `</tag>` starting from `pos` and iterating the end of the text.
/// Returns the Range of the tag's name (excluding the `</` and `>` characters.)
/// As well as the actual name of the tag and where it last stopped searching.
fn find_next_tag(
text: RopeSlice,
mut cursor_pos: usize,
skip: usize,
) -> Result<(Range, String, usize)> {
if cursor_pos >= text.len_chars() || skip == 0 {
return Err(Error::RangeExceedsText);
change_pos.push((prev_tag, tag_name.clone()));
change_pos.push((next_tag, tag_name));
}
let mut chars = text.chars_at(cursor_pos);
// sort all ranges by the first key
change_pos.sort_by(|&(a, _), (b, _)| a.from().cmp(&b.from()));
// look forward and find something that looks like a closing tag, e.g. <html> and extract it's name so we get "html"
loop {
let next_char = match chars.next() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos += 1;
if next_char == '<' {
let char_after_that = match chars.next() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos += 1;
if char_after_that == '/' {
let mut possible_tag_name = String::new();
loop {
let current_char = match chars.next() {
Some(ch) => ch,
None => return Err(Error::PairNotFound),
};
cursor_pos += 1;
if is_valid_tagname_char(current_char) {
possible_tag_name.push(current_char);
} else if current_char == '>' && possible_tag_name.len() != 0 {
let range =
Range::new(cursor_pos - possible_tag_name.len() - 1, cursor_pos - 1);
let has_overlaps = change_pos
.windows(2)
.any(|window| window[0].0.to() > window[1].0.from());
return Ok((range, possible_tag_name, cursor_pos));
} else {
log::error!("BREAKING!");
break;
}
}
}
}
if has_overlaps {
Err(Error::CursorOverlap)
} else {
Ok(change_pos)
}
}

58
helix-term/src/commands.rs
Unescape Escape View File

@ -5742,25 +5742,8 @@ fn surround_replace(cx: &mut Context) {
return;
}
let mut ranges: SmallVec<[Range; 1]> = change_pos
.iter()
.flat_map(|&((opening_tag_range, closing_tag_range), _)| {
vec![opening_tag_range, closing_tag_range]
})
.collect();
ranges.sort_by(|a, b| a.from().cmp(&b.from()));
let has_overlaps = ranges
.windows(2)
.any(|window| window[0].to() > window[1].from());
if has_overlaps {
context
.editor
.set_error("Cursors overlap for a single surround pair range");
return;
}
let ranges: SmallVec<[Range; 1]> =
change_pos.iter().map(|&(range, _)| range).collect();
document.set_selection(
view.id,
@ -5770,15 +5753,9 @@ fn surround_replace(cx: &mut Context) {
let transaction = Transaction::change(
document.text(),
change_pos.iter().flat_map(|(pos, _)| {
let opening_range = pos.0;
let closing_range = pos.1;
vec![
(opening_range.from(), opening_range.to(), Some(tag.clone())),
(closing_range.from(), closing_range.to(), Some(tag.clone())),
]
}),
change_pos
.iter()
.map(|(range, _)| (range.from(), range.to(), Some(tag.clone()))),
);
document.apply(&transaction, view.id);
@ -5865,32 +5842,15 @@ fn surround_delete(cx: &mut Context) {
return;
}
};
let mut ranges: SmallVec<[Range; 1]> = change_pos
.iter()
.flat_map(|&((opening_tag_range, closing_tag_range), _)| {
vec![opening_tag_range, closing_tag_range]
})
.collect();
ranges.sort_by(|a, b| a.from().cmp(&b.from()));
let has_overlaps = ranges
.windows(2)
.any(|window| window[0].to() > window[1].from());
if has_overlaps {
cx.editor
.set_error("Cursors overlap for a single surround pair range");
return;
}
let transaction = Transaction::change(
doc.text(),
change_pos.iter().flat_map(|(pos, _)| {
let opening_range = pos.0;
let closing_range = pos.1;
change_pos.chunks_exact(2).flat_map(|chunk| {
let opening_range = chunk[0].0;
let closing_range = chunk[1].0;
vec![
// add extra numbers to account for "<", ">" and "/" characters
// account for "<", ">" and "/" characters
(opening_range.from() - 1, opening_range.to() + 1, None),
(closing_range.from() - 2, closing_range.to() + 1, None),
]

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