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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/rust/clap_builder/src/output/textwrap/wrap_algorithms.rs | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/rust/clap_builder/src/output/textwrap/wrap_algorithms.rs | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/third_party/rust/clap_builder/src/output/textwrap/wrap_algorithms.rs b/third_party/rust/clap_builder/src/output/textwrap/wrap_algorithms.rs new file mode 100644 index 0000000000..34b4fd2b73 --- /dev/null +++ b/third_party/rust/clap_builder/src/output/textwrap/wrap_algorithms.rs @@ -0,0 +1,63 @@ +use super::core::display_width; + +#[derive(Debug)] +pub(crate) struct LineWrapper<'w> { + hard_width: usize, + line_width: usize, + carryover: Option<&'w str>, +} + +impl<'w> LineWrapper<'w> { + pub(crate) fn new(hard_width: usize) -> Self { + Self { + hard_width, + line_width: 0, + carryover: None, + } + } + + pub(crate) fn reset(&mut self) { + self.line_width = 0; + self.carryover = None; + } + + pub(crate) fn wrap(&mut self, mut words: Vec<&'w str>) -> Vec<&'w str> { + if self.carryover.is_none() { + if let Some(word) = words.first() { + if word.trim().is_empty() { + self.carryover = Some(*word); + } else { + self.carryover = Some(""); + } + } + } + + let mut i = 0; + while i < words.len() { + let word = &words[i]; + let trimmed = word.trim_end(); + let word_width = display_width(trimmed); + let trimmed_delta = word.len() - trimmed.len(); + if i != 0 && self.hard_width < self.line_width + word_width { + if 0 < i { + let last = i - 1; + let trimmed = words[last].trim_end(); + words[last] = trimmed; + } + + self.line_width = 0; + words.insert(i, "\n"); + i += 1; + if let Some(carryover) = self.carryover { + words.insert(i, carryover); + self.line_width += carryover.len(); + i += 1; + } + } + self.line_width += word_width + trimmed_delta; + + i += 1; + } + words + } +} |