Mirrors/clap
2
0
Fork 0
mirror of https://github.com/clap-rs/clap synced 2024-12-14 23:02:31 +00:00
Code Issues Projects Releases Packages Wiki Activity

refactor: let textwrap handle long words

Browse source 
The textwrap crate can handle long words fine. By default they're
broken to avoid lines longer than the specified width, but this can be
disabled.
This commit is contained in:
Martin Geisler 2017-02-08 20:33:40 +01:00 committed by Kevin K
parent f89a012d09
commit 88f26e083e
1 changed files with 11 additions and 30 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
src/app/help.rs
View file

@ -25,18 +25,6 @@ mod term_size {
pub fn dimensions() -> Option<(usize, usize)> { None } pub fn dimensions() -> Option<(usize, usize)> { None }
} }
macro_rules! find_longest {
($help:expr) => {{
let mut lw = 0;
for l in $help.split(' ').map(|s| str_width(s)) {
if l > lw {
lw = l;
}
}
lw
}};
}
fn str_width(s: &str) -> usize { UnicodeWidthStr::width(s) } fn str_width(s: &str) -> usize { UnicodeWidthStr::width(s) }
const TAB: &'static str = " "; const TAB: &'static str = " ";
@ -407,9 +395,8 @@ impl<'a> Help<'a> {
// Determine how many newlines we need to insert // Determine how many newlines we need to insert
debugln!("Help::write_before_after_help: Usable space: {}", debugln!("Help::write_before_after_help: Usable space: {}",
self.term_w); self.term_w);
let longest_w = find_longest!(help);
help = help.replace("{n}", "\n"); help = help.replace("{n}", "\n");
wrap_help(&mut help, longest_w, self.term_w); wrap_help(&mut help, self.term_w);
} else { } else {
sdebugln!("No"); sdebugln!("No");
} }
@ -450,9 +437,8 @@ impl<'a> Help<'a> {
// Determine how many newlines we need to insert // Determine how many newlines we need to insert
let avail_chars = self.term_w - spcs; let avail_chars = self.term_w - spcs;
debugln!("Help::help: Usable space...{}", avail_chars); debugln!("Help::help: Usable space...{}", avail_chars);
let longest_w = find_longest!(help);
help = help.replace("{n}", "\n"); help = help.replace("{n}", "\n");
wrap_help(&mut help, longest_w, avail_chars); wrap_help(&mut help, avail_chars);
} else { } else {
sdebugln!("No"); sdebugln!("No");
} }
@ -629,9 +615,8 @@ impl<'a> Help<'a> {
macro_rules! write_name { macro_rules! write_name {
() => {{ () => {{
let mut name = parser.meta.name.clone(); let mut name = parser.meta.name.clone();
let longest_w = find_longest!(name);
name = name.replace("{n}", "\n"); name = name.replace("{n}", "\n");
wrap_help(&mut name, longest_w, self.term_w); wrap_help(&mut name, self.term_w);
try!(color!(self, &*name, good)); try!(color!(self, &*name, good));
}}; }};
} }
@ -659,9 +644,8 @@ impl<'a> Help<'a> {
macro_rules! write_thing { macro_rules! write_thing {
($thing:expr) => {{ ($thing:expr) => {{
let mut owned_thing = $thing.to_owned(); let mut owned_thing = $thing.to_owned();
let longest_w = find_longest!(owned_thing);
owned_thing = owned_thing.replace("{n}", "\n"); owned_thing = owned_thing.replace("{n}", "\n");
wrap_help(&mut owned_thing, longest_w, self.term_w); wrap_help(&mut owned_thing, self.term_w);
try!(write!(self.writer, "{}\n", &*owned_thing)) try!(write!(self.writer, "{}\n", &*owned_thing))
}}; }};
} }
@ -923,15 +907,12 @@ impl<'a> Help<'a> {
} }
} }
fn wrap_help(help: &mut String, longest_w: usize, avail_chars: usize) { fn wrap_help(help: &mut String, avail_chars: usize) {
// Keep previous behavior of not wrapping at all if one of the let wrapper = textwrap::Wrapper::new(avail_chars).break_words(false);
// words would overflow the line.
if longest_w < avail_chars {
*help = help.lines() *help = help.lines()
.map(|line| textwrap::fill(line, avail_chars)) .map(|line| wrapper.fill(line))
.collect::<Vec<String>>() .collect::<Vec<String>>()
.join("\n"); .join("\n");
}
} }
#[cfg(test)] #[cfg(test)]
@ -941,7 +922,7 @@ mod test {
#[test] #[test]
fn wrap_help_last_word() { fn wrap_help_last_word() {
let mut help = String::from("foo bar baz"); let mut help = String::from("foo bar baz");
wrap_help(&mut help, 3, 5); wrap_help(&mut help, 5);
assert_eq!(help, "foo\nbar\nbaz"); assert_eq!(help, "foo\nbar\nbaz");
} }
} }