-// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
// Format string literals.
use regex::Regex;
+use unicode_categories::UnicodeCategories;
use unicode_segmentation::UnicodeSegmentation;
-use config::Config;
-use shape::Shape;
-use utils::wrap_str;
+use crate::config::Config;
+use crate::shape::Shape;
+use crate::utils::{unicode_str_width, wrap_str};
const MIN_STRING: usize = 10;
/// Describes the layout of a piece of text.
-pub struct StringFormat<'a> {
+pub(crate) struct StringFormat<'a> {
/// The opening sequence of characters for the piece of text
- pub opener: &'a str,
+ pub(crate) opener: &'a str,
/// The closing sequence of characters for the piece of text
- pub closer: &'a str,
+ pub(crate) closer: &'a str,
/// The opening sequence of characters for a line
- pub line_start: &'a str,
+ pub(crate) line_start: &'a str,
/// The closing sequence of characters for a line
- pub line_end: &'a str,
+ pub(crate) line_end: &'a str,
/// The allocated box to fit the text into
- pub shape: Shape,
+ pub(crate) shape: Shape,
/// Trim trailing whitespaces
- pub trim_end: bool,
- pub config: &'a Config,
+ pub(crate) trim_end: bool,
+ pub(crate) config: &'a Config,
}
impl<'a> StringFormat<'a> {
- pub fn new(shape: Shape, config: &'a Config) -> StringFormat<'a> {
+ pub(crate) fn new(shape: Shape, config: &'a Config) -> StringFormat<'a> {
StringFormat {
opener: "\"",
closer: "\"",
/// indentation into account.
///
/// If we cannot put at least a single character per line, the rewrite won't succeed.
- fn max_chars_with_indent(&self) -> Option<usize> {
+ fn max_width_with_indent(&self) -> Option<usize> {
Some(
self.shape
.width
)
}
- /// Like max_chars_with_indent but the indentation is not substracted.
+ /// Like max_width_with_indent but the indentation is not subtracted.
/// This allows to fit more graphemes from the string on a line when
/// SnippetState::EndWithLineFeed.
- fn max_chars_without_indent(&self) -> Option<usize> {
- Some(self.config.max_width().checked_sub(self.line_end.len())?)
+ fn max_width_without_indent(&self) -> Option<usize> {
+ self.config.max_width().checked_sub(self.line_end.len())
}
}
-pub fn rewrite_string<'a>(orig: &str, fmt: &StringFormat<'a>) -> Option<String> {
- let max_chars_with_indent = fmt.max_chars_with_indent()?;
- let max_chars_without_indent = fmt.max_chars_without_indent()?;
+pub(crate) fn rewrite_string<'a>(
+ orig: &str,
+ fmt: &StringFormat<'a>,
+ newline_max_chars: usize,
+) -> Option<String> {
+ let max_width_with_indent = fmt.max_width_with_indent()?;
+ let max_width_without_indent = fmt.max_width_without_indent()?;
let indent_with_newline = fmt.shape.indent.to_string_with_newline(fmt.config);
let indent_without_newline = fmt.shape.indent.to_string(fmt.config);
// Snip a line at a time from `stripped_str` until it is used up. Push the snippet
// onto result.
- let mut cur_max_chars = max_chars_with_indent;
+ let mut cur_max_width = max_width_with_indent;
let is_bareline_ok = fmt.line_start.is_empty() || is_whitespace(fmt.line_start);
loop {
// All the input starting at cur_start fits on the current line
- if graphemes.len() - cur_start <= cur_max_chars {
+ if graphemes_width(&graphemes[cur_start..]) <= cur_max_width {
for (i, grapheme) in graphemes[cur_start..].iter().enumerate() {
- if is_line_feed(grapheme) {
+ if is_new_line(grapheme) {
// take care of blank lines
- result = trim_right_but_line_feed(fmt.trim_end, result);
- result.push_str("\n");
+ result = trim_end_but_line_feed(fmt.trim_end, result);
+ result.push('\n');
if !is_bareline_ok && cur_start + i + 1 < graphemes.len() {
result.push_str(&indent_without_newline);
result.push_str(fmt.line_start);
result.push_str(grapheme);
}
}
- result = trim_right_but_line_feed(fmt.trim_end, result);
+ result = trim_end_but_line_feed(fmt.trim_end, result);
break;
}
// The input starting at cur_start needs to be broken
- match break_string(cur_max_chars, fmt.trim_end, &graphemes[cur_start..]) {
+ match break_string(
+ cur_max_width,
+ fmt.trim_end,
+ fmt.line_end,
+ &graphemes[cur_start..],
+ ) {
SnippetState::LineEnd(line, len) => {
result.push_str(&line);
result.push_str(fmt.line_end);
result.push_str(&indent_with_newline);
result.push_str(fmt.line_start);
- cur_max_chars = max_chars_with_indent;
+ cur_max_width = newline_max_chars;
cur_start += len;
}
SnippetState::EndWithLineFeed(line, len) => {
if line == "\n" && fmt.trim_end {
- result = result.trim_right().to_string();
+ result = result.trim_end().to_string();
}
result.push_str(&line);
if is_bareline_ok {
// the next line can benefit from the full width
- cur_max_chars = max_chars_without_indent;
+ cur_max_width = max_width_without_indent;
} else {
result.push_str(&indent_without_newline);
result.push_str(fmt.line_start);
- cur_max_chars = max_chars_with_indent;
+ cur_max_width = max_width_with_indent;
}
cur_start += len;
}
wrap_str(result, fmt.config.max_width(), fmt.shape)
}
+/// Returns the index to the end of the URL if the split at index of the given string includes a
+/// URL or alike. Otherwise, returns `None`.
+fn detect_url(s: &[&str], index: usize) -> Option<usize> {
+ let start = match s[..=index].iter().rposition(|g| is_whitespace(g)) {
+ Some(pos) => pos + 1,
+ None => 0,
+ };
+ // 8 = minimum length for a string to contain a URL
+ if s.len() < start + 8 {
+ return None;
+ }
+ let split = s[start..].concat();
+ if split.contains("https://")
+ || split.contains("http://")
+ || split.contains("ftp://")
+ || split.contains("file://")
+ {
+ match s[index..].iter().position(|g| is_whitespace(g)) {
+ Some(pos) => Some(index + pos - 1),
+ None => Some(s.len() - 1),
+ }
+ } else {
+ None
+ }
+}
+
/// Trims whitespaces to the right except for the line feed character.
-fn trim_right_but_line_feed(trim_end: bool, result: String) -> String {
+fn trim_end_but_line_feed(trim_end: bool, result: String) -> String {
let whitespace_except_line_feed = |c: char| c.is_whitespace() && c != '\n';
if trim_end && result.ends_with(whitespace_except_line_feed) {
result
- .trim_right_matches(whitespace_except_line_feed)
+ .trim_end_matches(whitespace_except_line_feed)
.to_string()
} else {
result
EndWithLineFeed(String, usize),
}
-/// Break the input string at a boundary character around the offset `max_chars`. A boundary
+fn not_whitespace_except_line_feed(g: &str) -> bool {
+ is_new_line(g) || !is_whitespace(g)
+}
+
+/// Break the input string at a boundary character around the offset `max_width`. A boundary
/// character is either a punctuation or a whitespace.
-fn break_string(max_chars: usize, trim_end: bool, input: &[&str]) -> SnippetState {
+/// FIXME(issue#3281): We must follow UAX#14 algorithm instead of this.
+fn break_string(max_width: usize, trim_end: bool, line_end: &str, input: &[&str]) -> SnippetState {
let break_at = |index /* grapheme at index is included */| {
// Take in any whitespaces to the left/right of `input[index]` while
// preserving line feeds
- let not_whitespace_except_line_feed = |g| is_line_feed(g) || !is_whitespace(g);
let index_minus_ws = input[0..=index]
.iter()
.rposition(|grapheme| not_whitespace_except_line_feed(grapheme))
.unwrap_or(index);
- // Take into account newlines occuring in input[0..=index], i.e., the possible next new
+ // Take into account newlines occurring in input[0..=index], i.e., the possible next new
// line. If there is one, then text after it could be rewritten in a way that the available
// space is fully used.
for (i, grapheme) in input[0..=index].iter().enumerate() {
- if is_line_feed(grapheme) {
+ if is_new_line(grapheme) {
if i <= index_minus_ws {
- let mut line = input[0..i].join("");
+ let mut line = &input[0..i].concat()[..];
if trim_end {
- line = line.trim_right().to_string();
+ line = line.trim_end();
}
return SnippetState::EndWithLineFeed(format!("{}\n", line), i + 1);
}
let mut index_plus_ws = index;
for (i, grapheme) in input[index + 1..].iter().enumerate() {
- if !trim_end && is_line_feed(grapheme) {
+ if !trim_end && is_new_line(grapheme) {
return SnippetState::EndWithLineFeed(
- input[0..=index + 1 + i].join("").to_string(),
+ input[0..=index + 1 + i].concat(),
index + 2 + i,
);
} else if not_whitespace_except_line_feed(grapheme) {
}
if trim_end {
- SnippetState::LineEnd(
- input[0..=index_minus_ws].join("").to_string(),
- index_plus_ws + 1,
- )
+ SnippetState::LineEnd(input[0..=index_minus_ws].concat(), index_plus_ws + 1)
} else {
- SnippetState::LineEnd(
- input[0..=index_plus_ws].join("").to_string(),
- index_plus_ws + 1,
- )
+ SnippetState::LineEnd(input[0..=index_plus_ws].concat(), index_plus_ws + 1)
+ }
+ };
+
+ // find a first index where the unicode width of input[0..x] become > max_width
+ let max_width_index_in_input = {
+ let mut cur_width = 0;
+ let mut cur_index = 0;
+ for (i, grapheme) in input.iter().enumerate() {
+ cur_width += unicode_str_width(grapheme);
+ cur_index = i;
+ if cur_width > max_width {
+ break;
+ }
}
+ cur_index
};
+ if max_width_index_in_input == 0 {
+ return SnippetState::EndOfInput(input.concat());
+ }
// Find the position in input for breaking the string
- match input[0..max_chars]
+ if line_end.is_empty()
+ && trim_end
+ && !is_whitespace(input[max_width_index_in_input - 1])
+ && is_whitespace(input[max_width_index_in_input])
+ {
+ // At a breaking point already
+ // The line won't invalidate the rewriting because:
+ // - no extra space needed for the line_end character
+ // - extra whitespaces to the right can be trimmed
+ return break_at(max_width_index_in_input - 1);
+ }
+ if let Some(url_index_end) = detect_url(input, max_width_index_in_input) {
+ let index_plus_ws = url_index_end
+ + input[url_index_end..]
+ .iter()
+ .skip(1)
+ .position(|grapheme| not_whitespace_except_line_feed(grapheme))
+ .unwrap_or(0);
+ return if trim_end {
+ SnippetState::LineEnd(input[..=url_index_end].concat(), index_plus_ws + 1)
+ } else {
+ SnippetState::LineEnd(input[..=index_plus_ws].concat(), index_plus_ws + 1)
+ };
+ }
+
+ match input[0..max_width_index_in_input]
.iter()
.rposition(|grapheme| is_whitespace(grapheme))
{
// Found a whitespace and what is on its left side is big enough.
Some(index) if index >= MIN_STRING => break_at(index),
// No whitespace found, try looking for a punctuation instead
- _ => match input[0..max_chars]
- .iter()
- .rposition(|grapheme| is_punctuation(grapheme))
+ _ => match (0..max_width_index_in_input)
+ .rev()
+ .skip_while(|pos| !is_valid_linebreak(input, *pos))
+ .next()
{
// Found a punctuation and what is on its left side is big enough.
Some(index) if index >= MIN_STRING => break_at(index),
// Either no boundary character was found to the left of `input[max_chars]`, or the line
// got too small. We try searching for a boundary character to the right.
- _ => match input[max_chars..]
- .iter()
- .position(|grapheme| is_whitespace(grapheme) || is_punctuation(grapheme))
+ _ => match (max_width_index_in_input..input.len())
+ .skip_while(|pos| !is_valid_linebreak(input, *pos))
+ .next()
{
// A boundary was found after the line limit
- Some(index) => break_at(max_chars + index),
+ Some(index) => break_at(index),
// No boundary to the right, the input cannot be broken
- None => SnippetState::EndOfInput(input.join("").to_string()),
+ None => SnippetState::EndOfInput(input.concat()),
},
},
}
}
-fn is_line_feed(grapheme: &str) -> bool {
- grapheme.as_bytes()[0] == b'\n'
+fn is_valid_linebreak(input: &[&str], pos: usize) -> bool {
+ let is_whitespace = is_whitespace(input[pos]);
+ if is_whitespace {
+ return true;
+ }
+ let is_punctuation = is_punctuation(input[pos]);
+ if is_punctuation && !is_part_of_type(input, pos) {
+ return true;
+ }
+ false
+}
+
+fn is_part_of_type(input: &[&str], pos: usize) -> bool {
+ input.get(pos..=pos + 1) == Some(&[":", ":"])
+ || input.get(pos.saturating_sub(1)..=pos) == Some(&[":", ":"])
+}
+
+fn is_new_line(grapheme: &str) -> bool {
+ let bytes = grapheme.as_bytes();
+ bytes.starts_with(b"\n") || bytes.starts_with(b"\r\n")
}
fn is_whitespace(grapheme: &str) -> bool {
- grapheme.chars().all(|c| c.is_whitespace())
+ grapheme.chars().all(char::is_whitespace)
}
fn is_punctuation(grapheme: &str) -> bool {
- match grapheme.as_bytes()[0] {
- b':' | b',' | b';' | b'.' => true,
- _ => false,
- }
+ grapheme
+ .chars()
+ .all(UnicodeCategories::is_punctuation_other)
+}
+
+fn graphemes_width(graphemes: &[&str]) -> usize {
+ graphemes.iter().map(|s| unicode_str_width(s)).sum()
}
#[cfg(test)]
mod test {
- use super::{break_string, rewrite_string, SnippetState, StringFormat};
- use config::Config;
- use shape::{Indent, Shape};
+ use super::{break_string, detect_url, rewrite_string, SnippetState, StringFormat};
+ use crate::config::Config;
+ use crate::shape::{Indent, Shape};
use unicode_segmentation::UnicodeSegmentation;
#[test]
fn issue343() {
let config = Default::default();
let fmt = StringFormat::new(Shape::legacy(2, Indent::empty()), &config);
- rewrite_string("eq_", &fmt);
+ rewrite_string("eq_", &fmt, 2);
+ }
+
+ #[test]
+ fn line_break_at_valid_points_test() {
+ let string = "[TheName](Dont::break::my::type::That::would::be::very::nice) break here";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(
+ break_string(20, false, "", &graphemes[..]),
+ SnippetState::LineEnd(
+ "[TheName](Dont::break::my::type::That::would::be::very::nice) ".to_string(),
+ 62
+ )
+ );
}
#[test]
let string = "Placerat felis. Mauris porta ante sagittis purus.";
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(20, false, &graphemes[..]),
+ break_string(20, false, "", &graphemes[..]),
SnippetState::LineEnd("Placerat felis. ".to_string(), 16)
);
assert_eq!(
- break_string(20, true, &graphemes[..]),
+ break_string(20, true, "", &graphemes[..]),
SnippetState::LineEnd("Placerat felis.".to_string(), 16)
);
}
let string = "Placerat_felis._Mauris_porta_ante_sagittis_purus.";
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(20, false, &graphemes[..]),
+ break_string(20, false, "", &graphemes[..]),
SnippetState::LineEnd("Placerat_felis.".to_string(), 15)
);
}
let string = "Venenatis_tellus_vel_tellus. Aliquam aliquam dolor at justo.";
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(20, false, &graphemes[..]),
+ break_string(20, false, "", &graphemes[..]),
SnippetState::LineEnd("Venenatis_tellus_vel_tellus. ".to_string(), 29)
);
assert_eq!(
- break_string(20, true, &graphemes[..]),
+ break_string(20, true, "", &graphemes[..]),
SnippetState::LineEnd("Venenatis_tellus_vel_tellus.".to_string(), 29)
);
}
let string = "Venenatis_tellus_vel_tellus";
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(20, false, &graphemes[..]),
+ break_string(20, false, "", &graphemes[..]),
SnippetState::EndOfInput("Venenatis_tellus_vel_tellus".to_string())
);
}
let string = "Neque in sem. \n Pellentesque tellus augue.";
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(15, false, &graphemes[..]),
+ break_string(15, false, "", &graphemes[..]),
SnippetState::EndWithLineFeed("Neque in sem. \n".to_string(), 20)
);
assert_eq!(
- break_string(25, false, &graphemes[..]),
+ break_string(25, false, "", &graphemes[..]),
SnippetState::EndWithLineFeed("Neque in sem. \n".to_string(), 20)
);
- // if `StringFormat::line_end` is true, then the line feed does not matter anymore
+
assert_eq!(
- break_string(15, true, &graphemes[..]),
- SnippetState::LineEnd("Neque in sem.".to_string(), 26)
+ break_string(15, true, "", &graphemes[..]),
+ SnippetState::LineEnd("Neque in sem.".to_string(), 19)
);
assert_eq!(
- break_string(25, true, &graphemes[..]),
- SnippetState::LineEnd("Neque in sem.".to_string(), 26)
+ break_string(25, true, "", &graphemes[..]),
+ SnippetState::EndWithLineFeed("Neque in sem.\n".to_string(), 20)
);
}
let string = "Neque in sem. Pellentesque tellus augue.";
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(20, false, &graphemes[..]),
+ break_string(20, false, "", &graphemes[..]),
SnippetState::LineEnd("Neque in sem. ".to_string(), 25)
);
assert_eq!(
- break_string(20, true, &graphemes[..]),
+ break_string(20, true, "", &graphemes[..]),
SnippetState::LineEnd("Neque in sem.".to_string(), 25)
);
}
let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
assert_eq!(
- break_string(25, false, &graphemes[..]),
+ break_string(25, false, "", &graphemes[..]),
SnippetState::EndWithLineFeed("Nulla\n".to_string(), 6)
);
assert_eq!(
- break_string(25, true, &graphemes[..]),
+ break_string(25, true, "", &graphemes[..]),
SnippetState::EndWithLineFeed("Nulla\n".to_string(), 6)
);
let mut config: Config = Default::default();
config.set().max_width(27);
let fmt = StringFormat::new(Shape::legacy(25, Indent::empty()), &config);
- let rewritten_string = rewrite_string(string, &fmt);
+ let rewritten_string = rewrite_string(string, &fmt, 27);
assert_eq!(
rewritten_string,
Some("\"Nulla\nconsequat erat at massa. \\\n Vivamus id mi.\"".to_string())
let mut fmt = StringFormat::new(Shape::legacy(25, Indent::empty()), &config);
fmt.trim_end = true;
- let rewritten_string = rewrite_string(string, &fmt);
+ let rewritten_string = rewrite_string(string, &fmt, 25);
assert_eq!(rewritten_string, Some("\"Vivamus id mi.\"".to_string()));
fmt.trim_end = false; // default value of trim_end
- let rewritten_string = rewrite_string(string, &fmt);
+ let rewritten_string = rewrite_string(string, &fmt, 25);
assert_eq!(rewritten_string, Some("\"Vivamus id mi. \"".to_string()));
}
config: &config,
};
- let rewritten_string = rewrite_string(string, &fmt);
+ let rewritten_string = rewrite_string(string, &fmt, 100);
assert_eq!(
rewritten_string,
Some("Vivamus id mi.\n // Vivamus id mi.".to_string())
};
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 30),
Some(
"Aenean metus.\n // Vestibulum ac lacus. Vivamus\n // porttitor"
.to_string()
};
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 30),
Some(
"Aenean metus.\n // Vestibulum ac lacus. Vivamus@\n // porttitor"
.to_string()
let comment = "Aenean metus. Vestibulum\n\nac lacus. Vivamus porttitor";
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 30),
Some(
"Aenean metus. Vestibulum\n //\n // ac lacus. Vivamus porttitor".to_string()
)
fmt.shape = Shape::legacy(15, Indent::from_width(&config, 4));
let comment = "Aenean\n\nmetus. Vestibulum ac lacus. Vivamus porttitor";
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 15),
Some(
r#"Aenean
//
let comment = "Aenean\n\nmetus. Vestibulum ac lacus.\n\n";
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 20),
Some(
"Aenean\n //\n // metus. Vestibulum ac\n // lacus.\n //\n".to_string()
)
let comment = "Aenean\n\nmetus. Vestibulum ac lacus.\n";
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 20),
Some("Aenean\n //\n // metus. Vestibulum ac\n // lacus.\n".to_string())
);
let comment = "Aenean\n \nmetus. Vestibulum ac lacus.";
assert_eq!(
- rewrite_string(comment, &fmt),
+ rewrite_string(comment, &fmt, 20),
Some("Aenean\n //\n // metus. Vestibulum ac\n // lacus.".to_string())
);
}
+
+ #[test]
+ fn boundary_on_edge() {
+ let config: Config = Default::default();
+ let mut fmt = StringFormat {
+ opener: "",
+ closer: "",
+ line_start: "// ",
+ line_end: "",
+ shape: Shape::legacy(13, Indent::from_width(&config, 4)),
+ trim_end: true,
+ config: &config,
+ };
+
+ let comment = "Aenean metus. Vestibulum ac lacus.";
+ assert_eq!(
+ rewrite_string(comment, &fmt, 13),
+ Some("Aenean metus.\n // Vestibulum ac\n // lacus.".to_string())
+ );
+
+ fmt.trim_end = false;
+ let comment = "Vestibulum ac lacus.";
+ assert_eq!(
+ rewrite_string(comment, &fmt, 13),
+ Some("Vestibulum \n // ac lacus.".to_string())
+ );
+
+ fmt.trim_end = true;
+ fmt.line_end = "\\";
+ let comment = "Vestibulum ac lacus.";
+ assert_eq!(
+ rewrite_string(comment, &fmt, 13),
+ Some("Vestibulum\\\n // ac lacus.".to_string())
+ );
+ }
+
+ #[test]
+ fn detect_urls() {
+ let string = "aaa http://example.org something";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(detect_url(&graphemes, 8), Some(21));
+
+ let string = "https://example.org something";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(detect_url(&graphemes, 0), Some(18));
+
+ let string = "aaa ftp://example.org something";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(detect_url(&graphemes, 8), Some(20));
+
+ let string = "aaa file://example.org something";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(detect_url(&graphemes, 8), Some(21));
+
+ let string = "aaa http not an url";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(detect_url(&graphemes, 6), None);
+
+ let string = "aaa file://example.org";
+ let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>();
+ assert_eq!(detect_url(&graphemes, 8), Some(21));
+ }
}
projects / rust.git / blobdiff