bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/ide/src/syntax_highlighting/injector.rs')
-rw-r--r--crates/ide/src/syntax_highlighting/injector.rs77
1 files changed, 0 insertions, 77 deletions
diff --git a/crates/ide/src/syntax_highlighting/injector.rs b/crates/ide/src/syntax_highlighting/injector.rs
deleted file mode 100644
index c30f797324..0000000000
--- a/crates/ide/src/syntax_highlighting/injector.rs
+++ /dev/null
@@ -1,77 +0,0 @@
-//! Extracts a subsequence of a text document, remembering the mapping of ranges
-//! between original and extracted texts.
-use std::ops::{self, Sub};
-
-use stdx::equal_range_by;
-use syntax::{TextRange, TextSize};
-
-#[derive(Default)]
-pub(super) struct Injector {
- buf: String,
- ranges: Vec<(TextRange, Option<Delta<TextSize>>)>,
-}
-
-impl Injector {
- pub(super) fn add(&mut self, text: &str, source_range: TextRange) {
- let len = TextSize::of(text);
- assert_eq!(len, source_range.len());
- self.add_impl(text, Some(source_range.start()));
- }
-
- pub(super) fn add_unmapped(&mut self, text: &str) {
- self.add_impl(text, None);
- }
-
- fn add_impl(&mut self, text: &str, source: Option<TextSize>) {
- let len = TextSize::of(text);
- let target_range = TextRange::at(TextSize::of(&self.buf), len);
- self.ranges.push((target_range, source.map(|it| Delta::new(target_range.start(), it))));
- self.buf.push_str(text);
- }
-
- pub(super) fn take_text(&mut self) -> String {
- std::mem::take(&mut self.buf)
- }
-
- pub(super) fn map_range_up(&self, range: TextRange) -> impl Iterator<Item = TextRange> + '_ {
- equal_range_by(&self.ranges, |&(r, _)| TextRange::ordering(r, range)).filter_map(move |i| {
- let (target_range, delta) = self.ranges[i];
- let intersection = target_range.intersect(range).unwrap();
- Some(intersection + delta?)
- })
- }
-}
-
-#[derive(Clone, Copy)]
-enum Delta<T> {
- Add(T),
- Sub(T),
-}
-
-impl<T> Delta<T> {
- fn new(from: T, to: T) -> Delta<T>
- where
- T: Ord + Sub<Output = T>,
- {
- if to >= from { Delta::Add(to - from) } else { Delta::Sub(from - to) }
- }
-}
-
-impl ops::Add<Delta<TextSize>> for TextSize {
- type Output = TextSize;
-
- fn add(self, rhs: Delta<TextSize>) -> TextSize {
- match rhs {
- Delta::Add(it) => self + it,
- Delta::Sub(it) => self - it,
- }
- }
-}
-
-impl ops::Add<Delta<TextSize>> for TextRange {
- type Output = TextRange;
-
- fn add(self, rhs: Delta<TextSize>) -> TextRange {
- TextRange::at(self.start() + rhs, self.len())
- }
-}