| // Format string literals. |
| |
| use regex::Regex; |
| use unicode_categories::UnicodeCategories; |
| use unicode_segmentation::UnicodeSegmentation; |
| |
| 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(crate) struct StringFormat<'a> { |
| /// The opening sequence of characters for the piece of text |
| pub(crate) opener: &'a str, |
| /// The closing sequence of characters for the piece of text |
| pub(crate) closer: &'a str, |
| /// The opening sequence of characters for a line |
| pub(crate) line_start: &'a str, |
| /// The closing sequence of characters for a line |
| pub(crate) line_end: &'a str, |
| /// The allocated box to fit the text into |
| pub(crate) shape: Shape, |
| /// Trim trailing whitespaces |
| pub(crate) trim_end: bool, |
| pub(crate) config: &'a Config, |
| } |
| |
| impl<'a> StringFormat<'a> { |
| pub(crate) fn new(shape: Shape, config: &'a Config) -> StringFormat<'a> { |
| StringFormat { |
| opener: "\"", |
| closer: "\"", |
| line_start: " ", |
| line_end: "\\", |
| shape, |
| trim_end: false, |
| config, |
| } |
| } |
| |
| /// Returns the maximum number of graphemes that is possible on a line while taking the |
| /// indentation into account. |
| /// |
| /// If we cannot put at least a single character per line, the rewrite won't succeed. |
| fn max_width_with_indent(&self) -> Option<usize> { |
| Some( |
| self.shape |
| .width |
| .checked_sub(self.opener.len() + self.line_end.len() + 1)? |
| + 1, |
| ) |
| } |
| |
| /// 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_width_without_indent(&self) -> Option<usize> { |
| Some(self.config.max_width().checked_sub(self.line_end.len())?) |
| } |
| } |
| |
| 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); |
| |
| // Strip line breaks. |
| // With this regex applied, all remaining whitespaces are significant |
| let strip_line_breaks_re = Regex::new(r"([^\\](\\\\)*)\\[\n\r][[:space:]]*").unwrap(); |
| let stripped_str = strip_line_breaks_re.replace_all(orig, "$1"); |
| |
| let graphemes = UnicodeSegmentation::graphemes(&*stripped_str, false).collect::<Vec<&str>>(); |
| |
| // `cur_start` is the position in `orig` of the start of the current line. |
| let mut cur_start = 0; |
| let mut result = String::with_capacity( |
| stripped_str |
| .len() |
| .checked_next_power_of_two() |
| .unwrap_or(usize::max_value()), |
| ); |
| result.push_str(fmt.opener); |
| |
| // Snip a line at a time from `stripped_str` until it is used up. Push the snippet |
| // onto result. |
| 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_width(&graphemes[cur_start..]) <= cur_max_width { |
| for (i, grapheme) in graphemes[cur_start..].iter().enumerate() { |
| if is_new_line(grapheme) { |
| // take care of blank lines |
| result = trim_end_but_line_feed(fmt.trim_end, result); |
| result.push_str("\n"); |
| if !is_bareline_ok && cur_start + i + 1 < graphemes.len() { |
| result.push_str(&indent_without_newline); |
| result.push_str(fmt.line_start); |
| } |
| } else { |
| result.push_str(grapheme); |
| } |
| } |
| 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_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_width = newline_max_chars; |
| cur_start += len; |
| } |
| SnippetState::EndWithLineFeed(line, len) => { |
| if line == "\n" && fmt.trim_end { |
| 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_width = max_width_without_indent; |
| } else { |
| result.push_str(&indent_without_newline); |
| result.push_str(fmt.line_start); |
| cur_max_width = max_width_with_indent; |
| } |
| cur_start += len; |
| } |
| SnippetState::EndOfInput(line) => { |
| result.push_str(&line); |
| break; |
| } |
| } |
| } |
| |
| result.push_str(fmt.closer); |
| wrap_str(result, fmt.config.max_width(), fmt.shape) |
| } |
| |
| /// Returns the index to the end of the URL if the given string includes an |
| /// 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, |
| }; |
| if s.len() < start + 8 { |
| return None; |
| } |
| let prefix = s[start..start + 8].concat(); |
| if prefix.starts_with("https://") |
| || prefix.starts_with("http://") |
| || prefix.starts_with("ftp://") |
| || prefix.starts_with("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_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_end_matches(whitespace_except_line_feed) |
| .to_string() |
| } else { |
| result |
| } |
| } |
| |
| /// Result of breaking a string so it fits in a line and the state it ended in. |
| /// The state informs about what to do with the snippet and how to continue the breaking process. |
| #[derive(Debug, PartialEq)] |
| enum SnippetState { |
| /// The input could not be broken and so rewriting the string is finished. |
| EndOfInput(String), |
| /// The input could be broken and the returned snippet should be ended with a |
| /// `[StringFormat::line_end]`. The next snippet needs to be indented. |
| /// |
| /// The returned string is the line to print out and the number is the length that got read in |
| /// the text being rewritten. That length may be greater than the returned string if trailing |
| /// whitespaces got trimmed. |
| LineEnd(String, usize), |
| /// The input could be broken but a newline is present that cannot be trimmed. The next snippet |
| /// to be rewritten *could* use more width than what is specified by the given shape. For |
| /// example with a multiline string, the next snippet does not need to be indented, allowing |
| /// more characters to be fit within a line. |
| /// |
| /// The returned string is the line to print out and the number is the length that got read in |
| /// the text being rewritten. |
| EndWithLineFeed(String, usize), |
| } |
| |
| 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. |
| /// 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 index_minus_ws = input[0..=index] |
| .iter() |
| .rposition(|grapheme| not_whitespace_except_line_feed(grapheme)) |
| .unwrap_or(index); |
| // 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_new_line(grapheme) { |
| if i <= index_minus_ws { |
| let mut line = &input[0..i].concat()[..]; |
| if trim_end { |
| line = line.trim_end(); |
| } |
| return SnippetState::EndWithLineFeed(format!("{}\n", line), i + 1); |
| } |
| break; |
| } |
| } |
| |
| let mut index_plus_ws = index; |
| for (i, grapheme) in input[index + 1..].iter().enumerate() { |
| if !trim_end && is_new_line(grapheme) { |
| return SnippetState::EndWithLineFeed( |
| input[0..=index + 1 + i].concat(), |
| index + 2 + i, |
| ); |
| } else if not_whitespace_except_line_feed(grapheme) { |
| index_plus_ws = index + i; |
| break; |
| } |
| } |
| |
| if trim_end { |
| SnippetState::LineEnd(input[0..=index_minus_ws].concat(), index_plus_ws + 1) |
| } else { |
| 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 |
| }; |
| |
| // Find the position in input for breaking the string |
| 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 { |
| return 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_width_index_in_input] |
| .iter() |
| .rposition(|grapheme| is_punctuation(grapheme)) |
| { |
| // 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_width_index_in_input..] |
| .iter() |
| .position(|grapheme| is_whitespace(grapheme) || is_punctuation(grapheme)) |
| { |
| // A boundary was found after the line limit |
| Some(index) => break_at(max_width_index_in_input + index), |
| // No boundary to the right, the input cannot be broken |
| None => SnippetState::EndOfInput(input.concat()), |
| }, |
| }, |
| } |
| } |
| |
| 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(char::is_whitespace) |
| } |
| |
| fn is_punctuation(grapheme: &str) -> bool { |
| 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, 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, 2); |
| } |
| |
| #[test] |
| fn should_break_on_whitespace() { |
| 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[..]), |
| SnippetState::LineEnd("Placerat felis. ".to_string(), 16) |
| ); |
| assert_eq!( |
| break_string(20, true, "", &graphemes[..]), |
| SnippetState::LineEnd("Placerat felis.".to_string(), 16) |
| ); |
| } |
| |
| #[test] |
| fn should_break_on_punctuation() { |
| 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[..]), |
| SnippetState::LineEnd("Placerat_felis.".to_string(), 15) |
| ); |
| } |
| |
| #[test] |
| fn should_break_forward() { |
| 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[..]), |
| SnippetState::LineEnd("Venenatis_tellus_vel_tellus. ".to_string(), 29) |
| ); |
| assert_eq!( |
| break_string(20, true, "", &graphemes[..]), |
| SnippetState::LineEnd("Venenatis_tellus_vel_tellus.".to_string(), 29) |
| ); |
| } |
| |
| #[test] |
| fn nothing_to_break() { |
| let string = "Venenatis_tellus_vel_tellus"; |
| let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>(); |
| assert_eq!( |
| break_string(20, false, "", &graphemes[..]), |
| SnippetState::EndOfInput("Venenatis_tellus_vel_tellus".to_string()) |
| ); |
| } |
| |
| #[test] |
| fn significant_whitespaces() { |
| 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[..]), |
| SnippetState::EndWithLineFeed("Neque in sem. \n".to_string(), 20) |
| ); |
| assert_eq!( |
| break_string(25, false, "", &graphemes[..]), |
| SnippetState::EndWithLineFeed("Neque in sem. \n".to_string(), 20) |
| ); |
| |
| assert_eq!( |
| break_string(15, true, "", &graphemes[..]), |
| SnippetState::LineEnd("Neque in sem.".to_string(), 19) |
| ); |
| assert_eq!( |
| break_string(25, true, "", &graphemes[..]), |
| SnippetState::EndWithLineFeed("Neque in sem.\n".to_string(), 20) |
| ); |
| } |
| |
| #[test] |
| fn big_whitespace() { |
| let string = "Neque in sem. Pellentesque tellus augue."; |
| let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>(); |
| assert_eq!( |
| break_string(20, false, "", &graphemes[..]), |
| SnippetState::LineEnd("Neque in sem. ".to_string(), 25) |
| ); |
| assert_eq!( |
| break_string(20, true, "", &graphemes[..]), |
| SnippetState::LineEnd("Neque in sem.".to_string(), 25) |
| ); |
| } |
| |
| #[test] |
| fn newline_in_candidate_line() { |
| let string = "Nulla\nconsequat erat at massa. Vivamus id mi."; |
| |
| let graphemes = UnicodeSegmentation::graphemes(&*string, false).collect::<Vec<&str>>(); |
| assert_eq!( |
| break_string(25, false, "", &graphemes[..]), |
| SnippetState::EndWithLineFeed("Nulla\n".to_string(), 6) |
| ); |
| assert_eq!( |
| 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, 27); |
| assert_eq!( |
| rewritten_string, |
| Some("\"Nulla\nconsequat erat at massa. \\\n Vivamus id mi.\"".to_string()) |
| ); |
| } |
| |
| #[test] |
| fn last_line_fit_with_trailing_whitespaces() { |
| let string = "Vivamus id mi. "; |
| let config: Config = Default::default(); |
| let mut fmt = StringFormat::new(Shape::legacy(25, Indent::empty()), &config); |
| |
| fmt.trim_end = true; |
| 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, 25); |
| assert_eq!(rewritten_string, Some("\"Vivamus id mi. \"".to_string())); |
| } |
| |
| #[test] |
| fn last_line_fit_with_newline() { |
| let string = "Vivamus id mi.\nVivamus id mi."; |
| let config: Config = Default::default(); |
| let fmt = StringFormat { |
| opener: "", |
| closer: "", |
| line_start: "// ", |
| line_end: "", |
| shape: Shape::legacy(100, Indent::from_width(&config, 4)), |
| trim_end: true, |
| config: &config, |
| }; |
| |
| let rewritten_string = rewrite_string(string, &fmt, 100); |
| assert_eq!( |
| rewritten_string, |
| Some("Vivamus id mi.\n // Vivamus id mi.".to_string()) |
| ); |
| } |
| |
| #[test] |
| fn overflow_in_non_string_content() { |
| let comment = "Aenean metus.\nVestibulum ac lacus. Vivamus porttitor"; |
| let config: Config = Default::default(); |
| let fmt = StringFormat { |
| opener: "", |
| closer: "", |
| line_start: "// ", |
| line_end: "", |
| shape: Shape::legacy(30, Indent::from_width(&config, 8)), |
| trim_end: true, |
| config: &config, |
| }; |
| |
| assert_eq!( |
| rewrite_string(comment, &fmt, 30), |
| Some( |
| "Aenean metus.\n // Vestibulum ac lacus. Vivamus\n // porttitor" |
| .to_string() |
| ) |
| ); |
| } |
| |
| #[test] |
| fn overflow_in_non_string_content_with_line_end() { |
| let comment = "Aenean metus.\nVestibulum ac lacus. Vivamus porttitor"; |
| let config: Config = Default::default(); |
| let fmt = StringFormat { |
| opener: "", |
| closer: "", |
| line_start: "// ", |
| line_end: "@", |
| shape: Shape::legacy(30, Indent::from_width(&config, 8)), |
| trim_end: true, |
| config: &config, |
| }; |
| |
| assert_eq!( |
| rewrite_string(comment, &fmt, 30), |
| Some( |
| "Aenean metus.\n // Vestibulum ac lacus. Vivamus@\n // porttitor" |
| .to_string() |
| ) |
| ); |
| } |
| |
| #[test] |
| fn blank_line_with_non_empty_line_start() { |
| let config: Config = Default::default(); |
| let mut fmt = StringFormat { |
| opener: "", |
| closer: "", |
| line_start: "// ", |
| line_end: "", |
| shape: Shape::legacy(30, Indent::from_width(&config, 4)), |
| trim_end: true, |
| config: &config, |
| }; |
| |
| let comment = "Aenean metus. Vestibulum\n\nac lacus. Vivamus porttitor"; |
| assert_eq!( |
| 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, 15), |
| Some( |
| r#"Aenean |
| // |
| // metus. Vestibulum |
| // ac lacus. Vivamus |
| // porttitor"# |
| .to_string() |
| ) |
| ); |
| } |
| |
| #[test] |
| fn retain_blank_lines() { |
| let config: Config = Default::default(); |
| let fmt = StringFormat { |
| opener: "", |
| closer: "", |
| line_start: "// ", |
| line_end: "", |
| shape: Shape::legacy(20, Indent::from_width(&config, 4)), |
| trim_end: true, |
| config: &config, |
| }; |
| |
| let comment = "Aenean\n\nmetus. Vestibulum ac lacus.\n\n"; |
| assert_eq!( |
| 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, 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, 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)); |
| } |
| } |
