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-rw-r--r--helix-core/Cargo.toml2
-rw-r--r--helix-core/src/date.rs217
-rw-r--r--helix-core/src/lib.rs1
3 files changed, 220 insertions, 0 deletions
diff --git a/helix-core/Cargo.toml b/helix-core/Cargo.toml
index ea695d34..0a2a56d9 100644
--- a/helix-core/Cargo.toml
+++ b/helix-core/Cargo.toml
@@ -36,5 +36,7 @@ similar = "2.1"
etcetera = "0.3"
+chrono = { version = "0.4", default-features = false, features = ["alloc", "std"] }
+
[dev-dependencies]
quickcheck = { version = "1", default-features = false }
diff --git a/helix-core/src/date.rs b/helix-core/src/date.rs
new file mode 100644
index 00000000..1332670d
--- /dev/null
+++ b/helix-core/src/date.rs
@@ -0,0 +1,217 @@
+use chrono::{Duration, NaiveDate};
+
+use std::borrow::Cow;
+
+use ropey::RopeSlice;
+
+use crate::{
+ textobject::{textobject_word, TextObject},
+ Range, Tendril,
+};
+
+// Only support formats that aren't region specific.
+static FORMATS: &[&str] = &["%Y-%m-%d", "%Y/%m/%d"];
+
+// We don't want to parse ambiguous dates like 10/11/12 or 7/8/10.
+// They must be YYYY-mm-dd or YYYY/mm/dd.
+// So 2021-01-05 works, but 2021-1-5 doesn't.
+const DATE_LENGTH: usize = 10;
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct DateIncrementor {
+ pub date: NaiveDate,
+ pub range: Range,
+ pub format: &'static str,
+}
+
+impl DateIncrementor {
+ pub fn from_range(text: RopeSlice, range: Range) -> Option<DateIncrementor> {
+ // Don't increment if the cursor is one right of the date text.
+ if text.char(range.from()).is_whitespace() {
+ return None;
+ }
+
+ let range = textobject_word(text, range, TextObject::Inside, 1, true);
+ let text: Cow<str> = text.slice(range.from()..range.to()).into();
+
+ let first = text.chars().next()?;
+ let last = text.chars().next_back()?;
+
+ // Allow date strings in quotes.
+ let (range, text) = if first == last && (first == '"' || first == '\'') {
+ (
+ Range::new(range.from() + 1, range.to() - 1),
+ Cow::from(&text[1..text.len() - 1]),
+ )
+ } else {
+ (range, text)
+ };
+
+ if text.len() != DATE_LENGTH {
+ return None;
+ }
+
+ FORMATS.iter().find_map(|format| {
+ NaiveDate::parse_from_str(&text, format)
+ .ok()
+ .map(|date| DateIncrementor {
+ date,
+ range,
+ format,
+ })
+ })
+ }
+
+ pub fn incremented_text(&self, amount: i64) -> Tendril {
+ let incremented_date = self.date + Duration::days(amount);
+ incremented_date.format(self.format).to_string().into()
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ use crate::Rope;
+
+ #[test]
+ fn test_date_dashes() {
+ let rope = Rope::from_str("2021-11-15");
+ let range = Range::point(0);
+ assert_eq!(
+ DateIncrementor::from_range(rope.slice(..), range),
+ Some(DateIncrementor {
+ date: NaiveDate::from_ymd(2021, 11, 15),
+ range: Range::new(0, 10),
+ format: "%Y-%m-%d",
+ })
+ );
+ }
+
+ #[test]
+ fn test_date_slashes() {
+ let rope = Rope::from_str("2021/11/15");
+ let range = Range::point(0);
+ assert_eq!(
+ DateIncrementor::from_range(rope.slice(..), range),
+ Some(DateIncrementor {
+ date: NaiveDate::from_ymd(2021, 11, 15),
+ range: Range::new(0, 10),
+ format: "%Y/%m/%d",
+ })
+ );
+ }
+
+ #[test]
+ fn test_date_surrounded_by_spaces() {
+ let rope = Rope::from_str(" 2021-11-15 ");
+ let range = Range::point(10);
+ assert_eq!(
+ DateIncrementor::from_range(rope.slice(..), range),
+ Some(DateIncrementor {
+ date: NaiveDate::from_ymd(2021, 11, 15),
+ range: Range::new(3, 13),
+ format: "%Y-%m-%d",
+ })
+ );
+ }
+
+ #[test]
+ fn test_date_in_single_quotes() {
+ let rope = Rope::from_str("date = '2021-11-15'");
+ let range = Range::point(10);
+ assert_eq!(
+ DateIncrementor::from_range(rope.slice(..), range),
+ Some(DateIncrementor {
+ date: NaiveDate::from_ymd(2021, 11, 15),
+ range: Range::new(8, 18),
+ format: "%Y-%m-%d",
+ })
+ );
+ }
+
+ #[test]
+ fn test_date_in_double_quotes() {
+ let rope = Rope::from_str("date = \"2021-11-15\"");
+ let range = Range::point(10);
+ assert_eq!(
+ DateIncrementor::from_range(rope.slice(..), range),
+ Some(DateIncrementor {
+ date: NaiveDate::from_ymd(2021, 11, 15),
+ range: Range::new(8, 18),
+ format: "%Y-%m-%d",
+ })
+ );
+ }
+
+ #[test]
+ fn test_date_cursor_one_right_of_date() {
+ let rope = Rope::from_str("2021-11-15 ");
+ let range = Range::point(10);
+ assert_eq!(DateIncrementor::from_range(rope.slice(..), range), None);
+ }
+
+ #[test]
+ fn test_date_cursor_one_left_of_number() {
+ let rope = Rope::from_str(" 2021-11-15");
+ let range = Range::point(0);
+ assert_eq!(DateIncrementor::from_range(rope.slice(..), range), None);
+ }
+
+ #[test]
+ fn test_invalid_dates() {
+ let tests = [
+ "0000-00-00",
+ "1980-2-21",
+ "1980-12-1",
+ "12345",
+ "2020-02-30",
+ "1999-12-32",
+ "19-12-32",
+ "1-2-3",
+ "0000/00/00",
+ "1980/2/21",
+ "1980/12/1",
+ "12345",
+ "2020/02/30",
+ "1999/12/32",
+ "19/12/32",
+ "1/2/3",
+ ];
+
+ for invalid in tests {
+ let rope = Rope::from_str(invalid);
+ let range = Range::point(0);
+
+ assert_eq!(DateIncrementor::from_range(rope.slice(..), range), None);
+ }
+ }
+
+ #[test]
+ fn test_increment_dates() {
+ let tests = [
+ ("1980-12-21", 1, "1980-12-22"),
+ ("1980-12-21", -1, "1980-12-20"),
+ ("1980-12-21", 100, "1981-03-31"),
+ ("1980-12-21", -100, "1980-09-12"),
+ ("1980-12-21", 1000, "1983-09-17"),
+ ("1980-12-21", -1000, "1978-03-27"),
+ ("1980/12/21", 1, "1980/12/22"),
+ ("1980/12/21", -1, "1980/12/20"),
+ ("1980/12/21", 100, "1981/03/31"),
+ ("1980/12/21", -100, "1980/09/12"),
+ ("1980/12/21", 1000, "1983/09/17"),
+ ("1980/12/21", -1000, "1978/03/27"),
+ ];
+
+ for (original, amount, expected) in tests {
+ let rope = Rope::from_str(original);
+ let range = Range::point(0);
+ assert_eq!(
+ DateIncrementor::from_range(rope.slice(..), range)
+ .unwrap()
+ .incremented_text(amount),
+ expected.into()
+ );
+ }
+ }
+}
diff --git a/helix-core/src/lib.rs b/helix-core/src/lib.rs
index 8ef41ef3..b16a716f 100644
--- a/helix-core/src/lib.rs
+++ b/helix-core/src/lib.rs
@@ -1,6 +1,7 @@
pub mod auto_pairs;
pub mod chars;
pub mod comment;
+pub mod date;
pub mod diagnostic;
pub mod diff;
pub mod graphemes;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-19 19:36:05 +0000