457 lines
14 KiB
Rust
457 lines
14 KiB
Rust
use std::ops::Range;
|
|
|
|
use ropey::{LineType, Rope, RopeSlice};
|
|
use sum_tree::Bias;
|
|
#[cfg(not(target_family = "wasm"))]
|
|
pub use tree_sitter::{InputEdit, Point};
|
|
|
|
#[cfg(target_family = "wasm")]
|
|
/// Stub type for tree-sitter Point on WASM (tree-sitter not available).
|
|
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
|
|
pub struct Point {
|
|
pub row: usize,
|
|
pub column: usize,
|
|
}
|
|
|
|
#[cfg(target_family = "wasm")]
|
|
impl Point {
|
|
pub fn new(row: usize, column: usize) -> Self {
|
|
Self { row, column }
|
|
}
|
|
}
|
|
|
|
#[cfg(target_family = "wasm")]
|
|
/// Stub type for tree-sitter InputEdit on WASM (tree-sitter not available).
|
|
#[derive(Debug, Clone, Copy)]
|
|
pub struct InputEdit {
|
|
pub start_byte: usize,
|
|
pub old_end_byte: usize,
|
|
pub new_end_byte: usize,
|
|
pub start_position: Point,
|
|
pub old_end_position: Point,
|
|
pub new_end_position: Point,
|
|
}
|
|
|
|
pub type Position = lsp_types::Position;
|
|
|
|
/// An iterator over the lines of a `Rope`.
|
|
pub struct RopeLines<'a> {
|
|
rope: &'a Rope,
|
|
row: usize,
|
|
end_row: usize,
|
|
}
|
|
|
|
impl<'a> RopeLines<'a> {
|
|
/// Create a new `RopeLines` iterator.
|
|
pub fn new(rope: &'a Rope) -> Self {
|
|
let end_row = rope.lines_len();
|
|
Self {
|
|
row: 0,
|
|
end_row,
|
|
rope,
|
|
}
|
|
}
|
|
}
|
|
impl<'a> Iterator for RopeLines<'a> {
|
|
type Item = RopeSlice<'a>;
|
|
|
|
#[inline]
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
if self.row >= self.end_row {
|
|
return None;
|
|
}
|
|
|
|
let line = self.rope.slice_line(self.row);
|
|
self.row += 1;
|
|
Some(line)
|
|
}
|
|
|
|
#[inline]
|
|
fn nth(&mut self, n: usize) -> Option<Self::Item> {
|
|
self.row = self.row.saturating_add(n);
|
|
self.next()
|
|
}
|
|
|
|
#[inline]
|
|
fn size_hint(&self) -> (usize, Option<usize>) {
|
|
let len = self.end_row - self.row;
|
|
(len, Some(len))
|
|
}
|
|
}
|
|
|
|
impl std::iter::ExactSizeIterator for RopeLines<'_> {}
|
|
impl std::iter::FusedIterator for RopeLines<'_> {}
|
|
|
|
/// An extension trait for [`Rope`] to provide additional utility methods.
|
|
pub trait RopeExt {
|
|
/// Start offset of the line at the given row (0-based) index.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
///
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// assert_eq!(rope.line_start_offset(0), 0);
|
|
/// assert_eq!(rope.line_start_offset(1), 6);
|
|
/// ```
|
|
fn line_start_offset(&self, row: usize) -> usize;
|
|
|
|
/// Line the end offset (including `\n`) of the line at the given row (0-based) index.
|
|
///
|
|
/// Return the end of the rope if the row is out of bounds.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// assert_eq!(rope.line_end_offset(0), 5); // "Hello\n"
|
|
/// assert_eq!(rope.line_end_offset(1), 12); // "World\r\n"
|
|
/// ```
|
|
fn line_end_offset(&self, row: usize) -> usize;
|
|
|
|
/// Return a line slice at the given row (0-based) index. including `\r` if present, but not `\n`.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// assert_eq!(rope.slice_line(0).to_string(), "Hello");
|
|
/// assert_eq!(rope.slice_line(1).to_string(), "World\r");
|
|
/// assert_eq!(rope.slice_line(2).to_string(), "This is a test 中文");
|
|
/// assert_eq!(rope.slice_line(6).to_string(), ""); // out of bounds
|
|
/// ```
|
|
fn slice_line(&self, row: usize) -> RopeSlice<'_>;
|
|
|
|
/// Return a slice of rows in the given range (0-based, end exclusive).
|
|
///
|
|
/// If the range is out of bounds, it will be clamped to the valid range.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// assert_eq!(rope.slice_lines(0..2).to_string(), "Hello\nWorld\r");
|
|
/// assert_eq!(rope.slice_lines(1..3).to_string(), "World\r\nThis is a test 中文");
|
|
/// assert_eq!(rope.slice_lines(2..5).to_string(), "This is a test 中文\nRope");
|
|
/// assert_eq!(rope.slice_lines(3..10).to_string(), "Rope");
|
|
/// assert_eq!(rope.slice_lines(5..10).to_string(), ""); // out of bounds
|
|
/// ```
|
|
fn slice_lines(&self, rows_range: Range<usize>) -> RopeSlice<'_>;
|
|
|
|
/// Return an iterator over all lines in the rope.
|
|
///
|
|
/// Each line slice includes `\r` if present, but not `\n`.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// let lines: Vec<_> = rope.iter_lines().map(|r| r.to_string()).collect();
|
|
/// assert_eq!(lines, vec!["Hello", "World\r", "This is a test 中文", "Rope"]);
|
|
/// ```
|
|
fn iter_lines(&self) -> RopeLines<'_>;
|
|
|
|
/// Return the number of lines in the rope.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// assert_eq!(rope.lines_len(), 4);
|
|
/// ```
|
|
fn lines_len(&self) -> usize;
|
|
|
|
/// Return the length of the row (0-based) in characters, including `\r` if present, but not `\n`.
|
|
///
|
|
/// If the row is out of bounds, return 0.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// assert_eq!(rope.line_len(0), 5); // "Hello"
|
|
/// assert_eq!(rope.line_len(1), 6); // "World\r"
|
|
/// assert_eq!(rope.line_len(2), 21); // "This is a test 中文"
|
|
/// assert_eq!(rope.line_len(4), 0); // out of bounds
|
|
/// ```
|
|
fn line_len(&self, row: usize) -> usize;
|
|
|
|
/// Replace the text in the given byte range with new text.
|
|
///
|
|
/// # Panics
|
|
///
|
|
/// - If the range is not on char boundary.
|
|
/// - If the range is out of bounds.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let mut rope = Rope::from("Hello\nWorld\r\nThis is a test 中文\nRope");
|
|
/// rope.replace(6..11, "Universe");
|
|
/// assert_eq!(rope.to_string(), "Hello\nUniverse\r\nThis is a test 中文\nRope");
|
|
/// ```
|
|
fn replace(&mut self, range: Range<usize>, new_text: &str);
|
|
|
|
/// Get char at the given offset (byte).
|
|
///
|
|
/// - If the offset is in the middle of a multi-byte character will panic.
|
|
/// - If the offset is out of bounds, return None.
|
|
fn char_at(&self, offset: usize) -> Option<char>;
|
|
|
|
/// Get the byte offset from the given line, column [`Position`] (0-based).
|
|
///
|
|
/// The column is in characters.
|
|
fn position_to_offset(&self, line_col: &Position) -> usize;
|
|
|
|
/// Get the line, column [`Position`] (0-based) from the given byte offset.
|
|
///
|
|
/// The column is in characters.
|
|
fn offset_to_position(&self, offset: usize) -> Position;
|
|
|
|
/// Get point (row, column) from the given byte offset.
|
|
///
|
|
/// The column is in bytes.
|
|
fn offset_to_point(&self, offset: usize) -> Point;
|
|
|
|
/// Get byte offset from the given point (row, column).
|
|
///
|
|
/// The column is 0-based in bytes.
|
|
fn point_to_offset(&self, point: Point) -> usize;
|
|
|
|
/// Get the word byte range at the given byte offset (0-based).
|
|
fn word_range(&self, offset: usize) -> Option<Range<usize>>;
|
|
|
|
/// Get word at the given byte offset (0-based).
|
|
fn word_at(&self, offset: usize) -> String;
|
|
|
|
/// Convert offset in UTF-16 to byte offset (0-based).
|
|
///
|
|
/// Runs in O(log N) time.
|
|
fn offset_utf16_to_offset(&self, offset_utf16: usize) -> usize;
|
|
|
|
/// Convert byte offset (0-based) to offset in UTF-16.
|
|
///
|
|
/// Runs in O(log N) time.
|
|
fn offset_to_offset_utf16(&self, offset: usize) -> usize;
|
|
|
|
/// Get a clipped offset (avoid in a char boundary).
|
|
///
|
|
/// - If Bias::Left and inside the char boundary, return the ix - 1;
|
|
/// - If Bias::Right and in inside char boundary, return the ix + 1;
|
|
/// - Otherwise return the ix.
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// use sum_tree::Bias;
|
|
///
|
|
/// let rope = Rope::from("Hello 中文🎉 test\nRope");
|
|
/// assert_eq!(rope.clip_offset(5, Bias::Left), 5);
|
|
/// // Inside multi-byte character '中' (3 bytes)
|
|
/// assert_eq!(rope.clip_offset(7, Bias::Left), 6);
|
|
/// assert_eq!(rope.clip_offset(7, Bias::Right), 9);
|
|
/// ```
|
|
fn clip_offset(&self, offset: usize, bias: Bias) -> usize;
|
|
|
|
/// Convert offset in characters to byte offset (0-based).
|
|
///
|
|
/// Run in O(n) time.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("a 中文🎉 test\nRope");
|
|
/// assert_eq!(rope.char_index_to_offset(0), 0);
|
|
/// assert_eq!(rope.char_index_to_offset(1), 1);
|
|
/// assert_eq!(rope.char_index_to_offset(3), "a 中".len());
|
|
/// assert_eq!(rope.char_index_to_offset(5), "a 中文🎉".len());
|
|
/// ```
|
|
fn char_index_to_offset(&self, char_index: usize) -> usize;
|
|
|
|
/// Convert byte offset (0-based) to offset in characters.
|
|
///
|
|
/// Run in O(n) time.
|
|
///
|
|
/// # Example
|
|
///
|
|
/// ```
|
|
/// use gpui_component::{Rope, RopeExt};
|
|
/// let rope = Rope::from("a 中文🎉 test\nRope");
|
|
/// assert_eq!(rope.offset_to_char_index(0), 0);
|
|
/// assert_eq!(rope.offset_to_char_index(1), 1);
|
|
/// assert_eq!(rope.offset_to_char_index(3), 3);
|
|
/// assert_eq!(rope.offset_to_char_index(4), 3);
|
|
/// ```
|
|
fn offset_to_char_index(&self, offset: usize) -> usize;
|
|
}
|
|
|
|
impl RopeExt for Rope {
|
|
fn slice_line(&self, row: usize) -> RopeSlice<'_> {
|
|
let total_lines = self.lines_len();
|
|
if row >= total_lines {
|
|
return self.slice(0..0);
|
|
}
|
|
|
|
let line = self.line(row, LineType::LF);
|
|
if line.len() > 0 {
|
|
let line_end = line.len() - 1;
|
|
if line.is_char_boundary(line_end) && line.char(line_end) == '\n' {
|
|
return line.slice(..line_end);
|
|
}
|
|
}
|
|
|
|
line
|
|
}
|
|
|
|
fn slice_lines(&self, rows_range: Range<usize>) -> RopeSlice<'_> {
|
|
let start = self.line_start_offset(rows_range.start);
|
|
let end = self.line_end_offset(rows_range.end.saturating_sub(1));
|
|
self.slice(start..end)
|
|
}
|
|
|
|
fn iter_lines(&self) -> RopeLines<'_> {
|
|
RopeLines::new(self)
|
|
}
|
|
|
|
fn line_len(&self, row: usize) -> usize {
|
|
self.slice_line(row).len()
|
|
}
|
|
|
|
fn line_start_offset(&self, row: usize) -> usize {
|
|
self.point_to_offset(Point::new(row, 0))
|
|
}
|
|
|
|
fn offset_to_point(&self, offset: usize) -> Point {
|
|
let offset = self.clip_offset(offset, Bias::Left);
|
|
let row = self.byte_to_line_idx(offset, LineType::LF);
|
|
let line_start = self.line_to_byte_idx(row, LineType::LF);
|
|
let column = offset.saturating_sub(line_start);
|
|
Point::new(row, column)
|
|
}
|
|
|
|
fn point_to_offset(&self, point: Point) -> usize {
|
|
if point.row >= self.lines_len() {
|
|
return self.len();
|
|
}
|
|
|
|
let line_start = self.line_to_byte_idx(point.row, LineType::LF);
|
|
line_start + point.column
|
|
}
|
|
|
|
fn position_to_offset(&self, pos: &Position) -> usize {
|
|
let line = self.slice_line(pos.line as usize);
|
|
self.line_start_offset(pos.line as usize)
|
|
+ line
|
|
.chars()
|
|
.take(pos.character as usize)
|
|
.map(|c| c.len_utf8())
|
|
.sum::<usize>()
|
|
}
|
|
|
|
fn offset_to_position(&self, offset: usize) -> Position {
|
|
let point = self.offset_to_point(offset);
|
|
let line = self.slice_line(point.row);
|
|
let offset = line.utf16_to_byte_idx(line.byte_to_utf16_idx(point.column));
|
|
let character = line.slice(..offset).chars().count();
|
|
Position::new(point.row as u32, character as u32)
|
|
}
|
|
|
|
fn line_end_offset(&self, row: usize) -> usize {
|
|
if row > self.lines_len() {
|
|
return self.len();
|
|
}
|
|
|
|
self.line_start_offset(row) + self.line_len(row)
|
|
}
|
|
|
|
fn lines_len(&self) -> usize {
|
|
self.len_lines(LineType::LF)
|
|
}
|
|
|
|
fn char_at(&self, offset: usize) -> Option<char> {
|
|
if offset > self.len() {
|
|
return None;
|
|
}
|
|
|
|
self.get_char(offset).ok()
|
|
}
|
|
|
|
fn word_range(&self, offset: usize) -> Option<Range<usize>> {
|
|
if offset >= self.len() {
|
|
return None;
|
|
}
|
|
|
|
let mut left = String::new();
|
|
let offset = self.clip_offset(offset, Bias::Left);
|
|
for c in self.chars_at(offset).reversed() {
|
|
if c.is_alphanumeric() || c == '_' {
|
|
left.insert(0, c);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
let start = offset.saturating_sub(left.len());
|
|
|
|
let right = self
|
|
.chars_at(offset)
|
|
.take_while(|c| c.is_alphanumeric() || *c == '_')
|
|
.collect::<String>();
|
|
|
|
let end = offset + right.len();
|
|
|
|
if start == end { None } else { Some(start..end) }
|
|
}
|
|
|
|
fn word_at(&self, offset: usize) -> String {
|
|
if let Some(range) = self.word_range(offset) {
|
|
self.slice(range).to_string()
|
|
} else {
|
|
String::new()
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
fn offset_utf16_to_offset(&self, offset_utf16: usize) -> usize {
|
|
if offset_utf16 > self.len_utf16() {
|
|
return self.len();
|
|
}
|
|
|
|
self.utf16_to_byte_idx(offset_utf16)
|
|
}
|
|
|
|
#[inline]
|
|
fn offset_to_offset_utf16(&self, offset: usize) -> usize {
|
|
if offset > self.len() {
|
|
return self.len_utf16();
|
|
}
|
|
|
|
self.byte_to_utf16_idx(offset)
|
|
}
|
|
|
|
fn replace(&mut self, range: Range<usize>, new_text: &str) {
|
|
let range =
|
|
self.clip_offset(range.start, Bias::Left)..self.clip_offset(range.end, Bias::Right);
|
|
self.remove(range.clone());
|
|
self.insert(range.start, new_text);
|
|
}
|
|
|
|
fn clip_offset(&self, offset: usize, bias: Bias) -> usize {
|
|
if offset > self.len() {
|
|
return self.len();
|
|
}
|
|
|
|
if self.is_char_boundary(offset) {
|
|
return offset;
|
|
}
|
|
|
|
if bias == Bias::Left {
|
|
self.floor_char_boundary(offset)
|
|
} else {
|
|
self.ceil_char_boundary(offset)
|
|
}
|
|
}
|
|
|
|
fn char_index_to_offset(&self, char_offset: usize) -> usize {
|
|
self.chars().take(char_offset).map(|c| c.len_utf8()).sum()
|
|
}
|
|
|
|
fn offset_to_char_index(&self, offset: usize) -> usize {
|
|
let offset = self.clip_offset(offset, Bias::Right);
|
|
self.slice(..offset).chars().count()
|
|
}
|
|
}
|