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cli: extract helpers from show_color_words_context_lines()

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This should make the next patch a bit easier to read.
This commit is contained in:
Yuya Nishihara 2024-10-05 12:18:05 +09:00
parent 6877ec4316
commit 1eeeb1462a
1 changed files with 28 additions and 18 deletions
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30
cli/src/diff_util.rs
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@ -583,30 +583,40 @@ fn show_color_words_context_lines(
num_before: usize,
) -> io::Result<DiffLineNumber> {
const SKIPPED_CONTEXT_LINE: &str = " ...\n";
let extract = || -> (Vec<&[u8]>, Vec<&[u8]>, u32) {
let mut lines = contents
.iter()
.flat_map(|content| content.split_inclusive(|b| *b == b'\n'))
.fuse();
for line in lines.by_ref().take(num_after) {
show_color_words_line_number(formatter, Some(line_number.left), Some(line_number.right))?;
let after_lines = lines.by_ref().take(num_after).collect();
let before_lines = lines.by_ref().rev().take(num_before + 1).collect();
let num_skipped: u32 = lines.count().try_into().unwrap();
(after_lines, before_lines, num_skipped)
};
let show = |formatter: &mut dyn Formatter, lines: &[&[u8]], mut line_number: DiffLineNumber| {
for line in lines {
show_color_words_line_number(
formatter,
Some(line_number.left),
Some(line_number.right),
)?;
show_color_words_inline_hunks(formatter, &[(DiffLineHunkSide::Both, line.as_ref())])?;
line_number.left += 1;
line_number.right += 1;
}
let mut before_lines = lines.by_ref().rev().take(num_before + 1).collect_vec();
let num_skipped: u32 = lines.count().try_into().unwrap();
io::Result::Ok(line_number)
};
let (after_lines, mut before_lines, num_skipped) = extract();
line_number = show(formatter, &after_lines, line_number)?;
if num_skipped > 0 {
write!(formatter, "{SKIPPED_CONTEXT_LINE}")?;
before_lines.pop();
line_number.left += num_skipped + 1;
line_number.right += num_skipped + 1;
}
for line in before_lines.into_iter().rev() {
show_color_words_line_number(formatter, Some(line_number.left), Some(line_number.right))?;
show_color_words_inline_hunks(formatter, &[(DiffLineHunkSide::Both, line.as_ref())])?;
line_number.left += 1;
line_number.right += 1;
}
before_lines.reverse();
line_number = show(formatter, &before_lines, line_number)?;
Ok(line_number)
}