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-rw-r--r--helix-core/src/increment/date_time.rs515
1 files changed, 515 insertions, 0 deletions
diff --git a/helix-core/src/increment/date_time.rs b/helix-core/src/increment/date_time.rs
new file mode 100644
index 00000000..39380104
--- /dev/null
+++ b/helix-core/src/increment/date_time.rs
@@ -0,0 +1,515 @@
+use chrono::{Datelike, Duration, NaiveDate, NaiveDateTime, NaiveTime, Timelike};
+use once_cell::sync::Lazy;
+use regex::Regex;
+use ropey::RopeSlice;
+
+use std::borrow::Cow;
+use std::cmp;
+
+use super::Increment;
+use crate::{Range, Tendril};
+
+#[derive(Debug, PartialEq, Eq)]
+pub struct DateTimeIncrementor {
+ date_time: NaiveDateTime,
+ range: Range,
+ format: Format,
+ field: DateField,
+}
+
+impl DateTimeIncrementor {
+ pub fn from_range(text: RopeSlice, range: Range) -> Option<DateTimeIncrementor> {
+ let range = if range.is_empty() {
+ if range.anchor < text.len_chars() {
+ // Treat empty range as a cursor range.
+ range.put_cursor(text, range.anchor + 1, true)
+ } else {
+ // The range is empty and at the end of the text.
+ return None;
+ }
+ } else {
+ range
+ };
+
+ FORMATS.iter().find_map(|format| {
+ let from = range.from().saturating_sub(format.max_len);
+ let to = (range.from() + format.max_len).min(text.len_chars());
+
+ let (from_in_text, to_in_text) = (range.from() - from, range.to() - from);
+ let text: Cow<str> = text.slice(from..to).into();
+
+ let captures = format.regex.captures(&text)?;
+ if captures.len() - 1 != format.fields.len() {
+ return None;
+ }
+
+ let date_time = captures.get(0)?;
+ let offset = range.from() - from_in_text;
+ let range = Range::new(date_time.start() + offset, date_time.end() + offset);
+
+ let field = captures
+ .iter()
+ .skip(1)
+ .enumerate()
+ .find_map(|(i, capture)| {
+ let capture = capture?;
+ let capture_range = capture.range();
+
+ if capture_range.contains(&from_in_text)
+ && capture_range.contains(&(to_in_text - 1))
+ {
+ Some(format.fields[i])
+ } else {
+ None
+ }
+ })?;
+
+ let has_date = format.fields.iter().any(|f| f.unit.is_date());
+ let has_time = format.fields.iter().any(|f| f.unit.is_time());
+
+ let date_time = match (has_date, has_time) {
+ (true, true) => NaiveDateTime::parse_from_str(
+ &text[date_time.start()..date_time.end()],
+ format.fmt,
+ )
+ .ok()?,
+ (true, false) => {
+ let date = NaiveDate::parse_from_str(
+ &text[date_time.start()..date_time.end()],
+ format.fmt,
+ )
+ .ok()?;
+
+ date.and_hms(0, 0, 0)
+ }
+ (false, true) => {
+ let time = NaiveTime::parse_from_str(
+ &text[date_time.start()..date_time.end()],
+ format.fmt,
+ )
+ .ok()?;
+
+ NaiveDate::from_ymd(0, 1, 1).and_time(time)
+ }
+ (false, false) => return None,
+ };
+
+ Some(DateTimeIncrementor {
+ date_time,
+ range,
+ format: format.clone(),
+ field,
+ })
+ })
+ }
+}
+
+impl Increment for DateTimeIncrementor {
+ fn increment(&self, amount: i64) -> (Range, Tendril) {
+ let date_time = match self.field.unit {
+ DateUnit::Years => add_years(self.date_time, amount),
+ DateUnit::Months => add_months(self.date_time, amount),
+ DateUnit::Days => add_duration(self.date_time, Duration::days(amount)),
+ DateUnit::Hours => add_duration(self.date_time, Duration::hours(amount)),
+ DateUnit::Minutes => add_duration(self.date_time, Duration::minutes(amount)),
+ DateUnit::Seconds => add_duration(self.date_time, Duration::seconds(amount)),
+ DateUnit::AmPm => toggle_am_pm(self.date_time),
+ }
+ .unwrap_or(self.date_time);
+
+ (
+ self.range,
+ date_time.format(self.format.fmt).to_string().into(),
+ )
+ }
+}
+
+static FORMATS: Lazy<Vec<Format>> = Lazy::new(|| {
+ vec![
+ Format::new("%Y-%m-%d %H:%M:%S"), // 2021-11-24 07:12:23
+ Format::new("%Y/%m/%d %H:%M:%S"), // 2021/11/24 07:12:23
+ Format::new("%Y-%m-%d %H:%M"), // 2021-11-24 07:12
+ Format::new("%Y/%m/%d %H:%M"), // 2021/11/24 07:12
+ Format::new("%Y-%m-%d"), // 2021-11-24
+ Format::new("%Y/%m/%d"), // 2021/11/24
+ Format::new("%a %b %d %Y"), // Wed Nov 24 2021
+ Format::new("%d-%b-%Y"), // 24-Nov-2021
+ Format::new("%Y %b %d"), // 2021 Nov 24
+ Format::new("%b %d, %Y"), // Nov 24, 2021
+ Format::new("%-I:%M:%S %P"), // 7:21:53 am
+ Format::new("%-I:%M %P"), // 7:21 am
+ Format::new("%-I:%M:%S %p"), // 7:21:53 AM
+ Format::new("%-I:%M %p"), // 7:21 AM
+ Format::new("%H:%M:%S"), // 23:24:23
+ Format::new("%H:%M"), // 23:24
+ ]
+});
+
+#[derive(Clone, Debug)]
+struct Format {
+ fmt: &'static str,
+ fields: Vec<DateField>,
+ regex: Regex,
+ max_len: usize,
+}
+
+impl Format {
+ fn new(fmt: &'static str) -> Self {
+ let mut remaining = fmt;
+ let mut fields = Vec::new();
+ let mut regex = String::new();
+ let mut max_len = 0;
+
+ while let Some(i) = remaining.find('%') {
+ let mut chars = remaining[i + 1..].chars();
+ let spec_len = if let Some(c) = chars.next() {
+ if c == '-' {
+ if chars.next().is_some() {
+ 2
+ } else {
+ 0
+ }
+ } else {
+ 1
+ }
+ } else {
+ 0
+ };
+
+ if i < remaining.len() - spec_len {
+ let specifier = &remaining[i + 1..i + 1 + spec_len];
+ if let Some(field) = DateField::from_specifier(specifier) {
+ fields.push(field);
+ max_len += field.max_len + remaining[..i].len();
+ regex += &remaining[..i];
+ regex += &format!("({})", field.regex);
+ remaining = &remaining[i + spec_len + 1..];
+ } else {
+ regex += &remaining[..=i];
+ }
+ } else {
+ regex += remaining;
+ }
+ }
+
+ let regex = Regex::new(&regex).unwrap();
+
+ Self {
+ fmt,
+ fields,
+ regex,
+ max_len,
+ }
+ }
+}
+
+impl PartialEq for Format {
+ fn eq(&self, other: &Self) -> bool {
+ self.fmt == other.fmt && self.fields == other.fields && self.max_len == other.max_len
+ }
+}
+
+impl Eq for Format {}
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+struct DateField {
+ regex: &'static str,
+ unit: DateUnit,
+ max_len: usize,
+}
+
+impl DateField {
+ fn from_specifier(specifier: &str) -> Option<Self> {
+ match specifier {
+ "Y" => Some(DateField {
+ regex: r"\d{4}",
+ unit: DateUnit::Years,
+ max_len: 5,
+ }),
+ "y" => Some(DateField {
+ regex: r"\d\d",
+ unit: DateUnit::Years,
+ max_len: 2,
+ }),
+ "m" => Some(DateField {
+ regex: r"[0-1]\d",
+ unit: DateUnit::Months,
+ max_len: 2,
+ }),
+ "d" => Some(DateField {
+ regex: r"[0-3]\d",
+ unit: DateUnit::Days,
+ max_len: 2,
+ }),
+ "-d" => Some(DateField {
+ regex: r"[1-3]?\d",
+ unit: DateUnit::Days,
+ max_len: 2,
+ }),
+ "a" => Some(DateField {
+ regex: r"Sun|Mon|Tue|Wed|Thu|Fri|Sat",
+ unit: DateUnit::Days,
+ max_len: 3,
+ }),
+ "A" => Some(DateField {
+ regex: r"Sunday|Monday|Tuesday|Wednesday|Thursday|Friday|Saturday",
+ unit: DateUnit::Days,
+ max_len: 9,
+ }),
+ "b" | "h" => Some(DateField {
+ regex: r"Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec",
+ unit: DateUnit::Months,
+ max_len: 3,
+ }),
+ "B" => Some(DateField {
+ regex: r"January|February|March|April|May|June|July|August|September|October|November|December",
+ unit: DateUnit::Months,
+ max_len: 9,
+ }),
+ "H" => Some(DateField {
+ regex: r"[0-2]\d",
+ unit: DateUnit::Hours,
+ max_len: 2,
+ }),
+ "M" => Some(DateField {
+ regex: r"[0-5]\d",
+ unit: DateUnit::Minutes,
+ max_len: 2,
+ }),
+ "S" => Some(DateField {
+ regex: r"[0-5]\d",
+ unit: DateUnit::Seconds,
+ max_len: 2,
+ }),
+ "I" => Some(DateField {
+ regex: r"[0-1]\d",
+ unit: DateUnit::Hours,
+ max_len: 2,
+ }),
+ "-I" => Some(DateField {
+ regex: r"1?\d",
+ unit: DateUnit::Hours,
+ max_len: 2,
+ }),
+ "P" => Some(DateField {
+ regex: r"am|pm",
+ unit: DateUnit::AmPm,
+ max_len: 2,
+ }),
+ "p" => Some(DateField {
+ regex: r"AM|PM",
+ unit: DateUnit::AmPm,
+ max_len: 2,
+ }),
+ _ => None,
+ }
+ }
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+enum DateUnit {
+ Years,
+ Months,
+ Days,
+ Hours,
+ Minutes,
+ Seconds,
+ AmPm,
+}
+
+impl DateUnit {
+ fn is_date(self) -> bool {
+ matches!(self, DateUnit::Years | DateUnit::Months | DateUnit::Days)
+ }
+
+ fn is_time(self) -> bool {
+ matches!(
+ self,
+ DateUnit::Hours | DateUnit::Minutes | DateUnit::Seconds
+ )
+ }
+}
+
+fn ndays_in_month(year: i32, month: u32) -> u32 {
+ // The first day of the next month...
+ let (y, m) = if month == 12 {
+ (year + 1, 1)
+ } else {
+ (year, month + 1)
+ };
+ let d = NaiveDate::from_ymd(y, m, 1);
+
+ // ...is preceded by the last day of the original month.
+ d.pred().day()
+}
+
+fn add_months(date_time: NaiveDateTime, amount: i64) -> Option<NaiveDateTime> {
+ let month = date_time.month0() as i64 + amount;
+ let year = date_time.year() + i32::try_from(month / 12).ok()?;
+ let year = if month.is_negative() { year - 1 } else { year };
+
+ // Normalize month
+ let month = month % 12;
+ let month = if month.is_negative() {
+ month + 13
+ } else {
+ month + 1
+ } as u32;
+
+ let day = cmp::min(date_time.day(), ndays_in_month(year, month));
+
+ Some(NaiveDate::from_ymd(year, month, day).and_time(date_time.time()))
+}
+
+fn add_years(date_time: NaiveDateTime, amount: i64) -> Option<NaiveDateTime> {
+ let year = i32::try_from(date_time.year() as i64 + amount).ok()?;
+ let ndays = ndays_in_month(year, date_time.month());
+
+ if date_time.day() > ndays {
+ let d = NaiveDate::from_ymd(year, date_time.month(), ndays);
+ Some(d.succ().and_time(date_time.time()))
+ } else {
+ date_time.with_year(year)
+ }
+}
+
+fn add_duration(date_time: NaiveDateTime, duration: Duration) -> Option<NaiveDateTime> {
+ date_time.checked_add_signed(duration)
+}
+
+fn toggle_am_pm(date_time: NaiveDateTime) -> Option<NaiveDateTime> {
+ if date_time.hour() < 12 {
+ add_duration(date_time, Duration::hours(12))
+ } else {
+ add_duration(date_time, Duration::hours(-12))
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ use crate::Rope;
+
+ #[test]
+ fn test_increment_date_times() {
+ let tests = [
+ // (original, cursor, amount, expected)
+ ("2020-02-28", 0, 1, "2021-02-28"),
+ ("2020-02-29", 0, 1, "2021-03-01"),
+ ("2020-01-31", 5, 1, "2020-02-29"),
+ ("2020-01-20", 5, 1, "2020-02-20"),
+ ("2021-01-01", 5, -1, "2020-12-01"),
+ ("2021-01-31", 5, -2, "2020-11-30"),
+ ("2020-02-28", 8, 1, "2020-02-29"),
+ ("2021-02-28", 8, 1, "2021-03-01"),
+ ("2021-02-28", 0, -1, "2020-02-28"),
+ ("2021-03-01", 0, -1, "2020-03-01"),
+ ("2020-02-29", 5, -1, "2020-01-29"),
+ ("2020-02-20", 5, -1, "2020-01-20"),
+ ("2020-02-29", 8, -1, "2020-02-28"),
+ ("2021-03-01", 8, -1, "2021-02-28"),
+ ("1980/12/21", 8, 100, "1981/03/31"),
+ ("1980/12/21", 8, -100, "1980/09/12"),
+ ("1980/12/21", 8, 1000, "1983/09/17"),
+ ("1980/12/21", 8, -1000, "1978/03/27"),
+ ("2021-11-24 07:12:23", 0, 1, "2022-11-24 07:12:23"),
+ ("2021-11-24 07:12:23", 5, 1, "2021-12-24 07:12:23"),
+ ("2021-11-24 07:12:23", 8, 1, "2021-11-25 07:12:23"),
+ ("2021-11-24 07:12:23", 11, 1, "2021-11-24 08:12:23"),
+ ("2021-11-24 07:12:23", 14, 1, "2021-11-24 07:13:23"),
+ ("2021-11-24 07:12:23", 17, 1, "2021-11-24 07:12:24"),
+ ("2021/11/24 07:12:23", 0, 1, "2022/11/24 07:12:23"),
+ ("2021/11/24 07:12:23", 5, 1, "2021/12/24 07:12:23"),
+ ("2021/11/24 07:12:23", 8, 1, "2021/11/25 07:12:23"),
+ ("2021/11/24 07:12:23", 11, 1, "2021/11/24 08:12:23"),
+ ("2021/11/24 07:12:23", 14, 1, "2021/11/24 07:13:23"),
+ ("2021/11/24 07:12:23", 17, 1, "2021/11/24 07:12:24"),
+ ("2021-11-24 07:12", 0, 1, "2022-11-24 07:12"),
+ ("2021-11-24 07:12", 5, 1, "2021-12-24 07:12"),
+ ("2021-11-24 07:12", 8, 1, "2021-11-25 07:12"),
+ ("2021-11-24 07:12", 11, 1, "2021-11-24 08:12"),
+ ("2021-11-24 07:12", 14, 1, "2021-11-24 07:13"),
+ ("2021/11/24 07:12", 0, 1, "2022/11/24 07:12"),
+ ("2021/11/24 07:12", 5, 1, "2021/12/24 07:12"),
+ ("2021/11/24 07:12", 8, 1, "2021/11/25 07:12"),
+ ("2021/11/24 07:12", 11, 1, "2021/11/24 08:12"),
+ ("2021/11/24 07:12", 14, 1, "2021/11/24 07:13"),
+ ("Wed Nov 24 2021", 0, 1, "Thu Nov 25 2021"),
+ ("Wed Nov 24 2021", 4, 1, "Fri Dec 24 2021"),
+ ("Wed Nov 24 2021", 8, 1, "Thu Nov 25 2021"),
+ ("Wed Nov 24 2021", 11, 1, "Thu Nov 24 2022"),
+ ("24-Nov-2021", 0, 1, "25-Nov-2021"),
+ ("24-Nov-2021", 3, 1, "24-Dec-2021"),
+ ("24-Nov-2021", 7, 1, "24-Nov-2022"),
+ ("2021 Nov 24", 0, 1, "2022 Nov 24"),
+ ("2021 Nov 24", 5, 1, "2021 Dec 24"),
+ ("2021 Nov 24", 9, 1, "2021 Nov 25"),
+ ("Nov 24, 2021", 0, 1, "Dec 24, 2021"),
+ ("Nov 24, 2021", 4, 1, "Nov 25, 2021"),
+ ("Nov 24, 2021", 8, 1, "Nov 24, 2022"),
+ ("7:21:53 am", 0, 1, "8:21:53 am"),
+ ("7:21:53 am", 3, 1, "7:22:53 am"),
+ ("7:21:53 am", 5, 1, "7:21:54 am"),
+ ("7:21:53 am", 8, 1, "7:21:53 pm"),
+ ("7:21:53 AM", 0, 1, "8:21:53 AM"),
+ ("7:21:53 AM", 3, 1, "7:22:53 AM"),
+ ("7:21:53 AM", 5, 1, "7:21:54 AM"),
+ ("7:21:53 AM", 8, 1, "7:21:53 PM"),
+ ("7:21 am", 0, 1, "8:21 am"),
+ ("7:21 am", 3, 1, "7:22 am"),
+ ("7:21 am", 5, 1, "7:21 pm"),
+ ("7:21 AM", 0, 1, "8:21 AM"),
+ ("7:21 AM", 3, 1, "7:22 AM"),
+ ("7:21 AM", 5, 1, "7:21 PM"),
+ ("23:24:23", 1, 1, "00:24:23"),
+ ("23:24:23", 3, 1, "23:25:23"),
+ ("23:24:23", 6, 1, "23:24:24"),
+ ("23:24", 1, 1, "00:24"),
+ ("23:24", 3, 1, "23:25"),
+ ];
+
+ for (original, cursor, amount, expected) in tests {
+ let rope = Rope::from_str(original);
+ let range = Range::new(cursor, cursor + 1);
+ assert_eq!(
+ DateTimeIncrementor::from_range(rope.slice(..), range)
+ .unwrap()
+ .increment(amount)
+ .1,
+ expected.into()
+ );
+ }
+ }
+
+ #[test]
+ fn test_invalid_date_times() {
+ 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",
+ "123:456:789",
+ "11:61",
+ "2021-55-12 08:12:54",
+ ];
+
+ for invalid in tests {
+ let rope = Rope::from_str(invalid);
+ let range = Range::new(0, 1);
+
+ assert_eq!(DateTimeIncrementor::from_range(rope.slice(..), range), None)
+ }
+ }
+}
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-25 04:57:36 +0000