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Cache the lengths of formatting-striped fields

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The code could do with some comments, but it works.
This commit is contained in:
Ben S 2014-05-25 17:14:50 +01:00
parent b116889abc
commit ff0bef66e5
1 changed files with 11 additions and 5 deletions
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16
exa.rs
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@ -64,25 +64,31 @@ fn list(options: Options, path: Path) {
}
let columns = defaultColumns();
let num_columns = columns.len();
let table: Vec<Vec<StrBuf>> = files.iter()
.filter(|&f| options.show(f))
.map(|f| columns.iter().map(|c| f.display(c)).collect())
.collect();
let maxes: Vec<uint> = range(0, columns.len())
.map(|n| table.iter().map(|row| colours::strip_formatting(row.get(n)).len()).max().unwrap())
let lengths: Vec<Vec<uint>> = table.iter()
.map(|row| row.iter().map( |col| colours::strip_formatting(col).len() ).collect())
.collect();
for row in table.iter() {
let maxes: Vec<uint> = range(0, num_columns)
.map(|n| lengths.iter().map(|row| *row.get(n)).max().unwrap())
.collect();
for (field_lengths, row) in lengths.iter().zip(table.iter()) {
let mut first = true;
for (length, cell) in maxes.iter().zip(row.iter()) {
for ((column_length, cell), field_length) in maxes.iter().zip(row.iter()).zip(field_lengths.iter()) {
if first {
first = false;
} else {
print!(" ");
}
print!("{}", cell.as_slice());
for _ in range(colours::strip_formatting(cell).len(), *length) {
for _ in range(*field_length, *column_length) {
print!(" ");
}
}