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@ -141,6 +141,17 @@ impl App {
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see all available themes",
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),
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)
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.arg(
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Arg::with_name("line-range")
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.long("line-range")
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.overrides_with("line-range")
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.takes_value(true)
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.help("Print range of lines")
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.long_help(
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"Print a specified range of lines from the files \
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--line-range 30-40 or --line-range 30-",
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),
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)
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.arg(
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Arg::with_name("list-themes")
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.long("list-themes")
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@ -269,6 +280,7 @@ impl App {
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term_width: Term::stdout().size().1 as usize,
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files,
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theme: self.matches.value_of("theme"),
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line_range: get_ranges(self.matches.value_of("line-range")),
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})
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}
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@ -322,6 +334,7 @@ pub struct Config<'a> {
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pub term_width: usize,
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pub files: Vec<Option<&'a str>>,
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pub theme: Option<&'a str>,
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pub line_range: Option<(usize, usize)>,
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}
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fn is_truecolor_terminal() -> bool {
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@ -329,3 +342,29 @@ fn is_truecolor_terminal() -> bool {
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.map(|colorterm| colorterm == "truecolor" || colorterm == "24bit")
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.unwrap_or(false)
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}
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fn get_ranges(value: Option<&str>) -> Option<(usize, usize)> {
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match value {
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None => None,
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Some(str_range) => {
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let mut new_range = (usize::min_value(), usize::max_value());
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if str_range.bytes().nth(0).expect("Something should be here!") == b':' {
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new_range.1 = str_range[1..].parse().expect("This should be a number!");
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return Some(new_range);
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} else if str_range.bytes().last().expect("There should be a last!") == b':' {
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new_range.0 = str_range[..str_range.len() - 1]
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.parse()
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.expect("This should be a number!");
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return Some(new_range);
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}
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let line_numbers: Vec<&str> = str_range.split(':').collect();
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if line_numbers.len() == 2 {
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new_range.0 = line_numbers[0].parse().expect("Should be a number!");
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new_range.1 = line_numbers[1].parse().expect("Should be a number!");
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}
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Some(new_range)
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}
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}
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}
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