use std::io::BufRead;
use std::iter::Iterator;
-pub struct Config {}
+pub struct Config {
+ pub column_threshold: usize,
+}
const HEADER: &str = r#"<!DOCTYPE html>
<html>
tr.key > th > div { width: 1em; }
tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
td { border: thin solid gray; }
+ td.leftover { text-align: left; border: none; padding-left: .4em; }
td.yes { border: thin solid gray; background-color: #ddd; }
/* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
.highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
entries: HashMap<String, Vec<Option<String>>>,
}
+#[derive(Debug, PartialEq, Eq)]
+enum Rowlike {
+ Row(Row),
+ Spacer,
+}
+
struct Reader<Input: Iterator<Item = Result<String, std::io::Error>>> {
input: std::iter::Enumerate<Input>,
row: Option<Row>,
}
}
impl<Input: Iterator<Item = Result<String, std::io::Error>>> Iterator for Reader<Input> {
- type Item = Result<Row, std::io::Error>;
+ type Item = Result<Rowlike, std::io::Error>;
fn next(&mut self) -> Option<Self::Item> {
loop {
match self.input.next() {
- None => return Ok(std::mem::take(&mut self.row)).transpose(),
+ None => return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose(),
Some((_, Err(e))) => return Some(Err(e)),
Some((n, Ok(line))) => match InputLine::from(line.as_ref()) {
InputLine::Blank if self.row.is_some() => {
- return Ok(std::mem::take(&mut self.row)).transpose()
+ return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose()
}
InputLine::Blank => {}
InputLine::Entry(col, instance) => match &mut self.row {
entries: HashMap::new(),
});
if prev.is_some() {
- return Ok(prev).transpose();
+ return Ok(prev.map(Rowlike::Row)).transpose();
}
}
},
}
}
-fn read_rows(input: impl std::io::Read) -> impl Iterator<Item = Result<Row, std::io::Error>> {
+fn read_rows(input: impl std::io::Read) -> impl Iterator<Item = Result<Rowlike, std::io::Error>> {
Reader::new(std::io::BufReader::new(input).lines())
}
-fn column_counts(rows: &[Row]) -> Vec<(usize, String)> {
+fn column_counts(rows: &[Rowlike]) -> Vec<(usize, String)> {
+ let empty = HashMap::new();
let mut counts: Vec<_> = rows
.iter()
- .flat_map(|r| r.entries.keys())
+ .flat_map(|rl| match rl {
+ Rowlike::Row(r) => r.entries.keys(),
+ Rowlike::Spacer => empty.keys(),
+ })
.fold(HashMap::new(), |mut cs, col| {
cs.entry(col.to_owned())
.and_modify(|n| *n += 1)
counts.sort_unstable_by(|(an, acol), (bn, bcol)| bn.cmp(an).then(acol.cmp(bcol)));
counts
}
-fn column_order(rows: &[Row]) -> Vec<String> {
+fn column_order(config: &Config, rows: &[Rowlike]) -> Vec<String> {
column_counts(rows)
.into_iter()
- .map(|(_, col)| col)
+ .filter_map(|(n, col)| (n >= config.column_threshold).then_some(col))
.collect()
}
)
}
-fn render_row(columns: &[String], row: &mut Row) -> HTML {
- let row_label = HTML::escape(row.label.as_ref());
- let cells = columns
- .iter()
- .map(|col| render_cell(col, row))
- .collect::<HTML>();
- let leftovers = render_all_leftovers(row);
- HTML(format!(
- "<tr><th id=\"{row_label}\">{row_label}</th>{cells}<td onmouseover=\"highlight('{row_label}')\" onmouseout=\"clear_highlight('{row_label}')\">{leftovers}</td></tr>\n"
- ))
+fn render_row(columns: &[String], rowlike: &mut Rowlike) -> HTML {
+ match rowlike {
+ Rowlike::Spacer => HTML::from("<tr><td> </td></tr>"),
+ Rowlike::Row(row) => {
+ let row_label = HTML::escape(row.label.as_ref());
+ let cells = columns
+ .iter()
+ .map(|col| render_cell(col, row))
+ .collect::<HTML>();
+ let leftovers = render_all_leftovers(row);
+ HTML(format!(
+ "<tr><th id=\"{row_label}\">{row_label}</th>{cells}<td class=\"leftover\" onmouseover=\"highlight('{row_label}')\" onmouseout=\"clear_highlight('{row_label}')\">{leftovers}</td></tr>\n"
+ ))
+ }
+ }
}
fn render_column_headers(columns: &[String]) -> HTML {
/// * an indented line with no preceding non-indented line
pub fn tablify(config: &Config, input: impl std::io::Read) -> Result<HTML, std::io::Error> {
let rows = read_rows(input).collect::<Result<Vec<_>, _>>()?;
- let columns = column_order(&rows);
+ let columns = column_order(config, &rows);
Ok(HTML(format!(
"{HEADER}{}{}{FOOTER}",
render_column_headers(&columns),
fn test_read_rows() {
assert_eq!(
read_rows(&b"foo"[..]).flatten().collect::<Vec<_>>(),
- vec![Row {
+ vec![Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::new(),
- }]
+ })]
);
assert_eq!(
read_rows(&b"bar"[..]).flatten().collect::<Vec<_>>(),
- vec![Row {
+ vec![Rowlike::Row(Row {
label: "bar".to_owned(),
entries: HashMap::new(),
- }]
+ })]
);
assert_eq!(
read_rows(&b"foo\nbar\n"[..]).flatten().collect::<Vec<_>>(),
vec![
- Row {
+ Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::new(),
- },
- Row {
+ }),
+ Rowlike::Row(Row {
label: "bar".to_owned(),
entries: HashMap::new(),
- }
+ })
]
);
assert_eq!(
read_rows(&b"foo\n bar\n"[..]).flatten().collect::<Vec<_>>(),
- vec![Row {
+ vec![Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::from([("bar".to_owned(), vec![None])]),
- }]
+ })]
);
assert_eq!(
read_rows(&b"foo\n bar\n baz\n"[..])
.flatten()
.collect::<Vec<_>>(),
- vec![Row {
+ vec![Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::from([
("bar".to_owned(), vec![None]),
("baz".to_owned(), vec![None])
]),
- }]
+ })]
);
assert_eq!(
read_rows(&b"foo\n\nbar\n"[..])
.flatten()
.collect::<Vec<_>>(),
vec![
- Row {
+ Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::new(),
- },
- Row {
+ }),
+ Rowlike::Row(Row {
label: "bar".to_owned(),
entries: HashMap::new(),
- }
+ })
]
);
assert_eq!(
.flatten()
.collect::<Vec<_>>(),
vec![
- Row {
+ Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::new(),
- },
- Row {
+ }),
+ Rowlike::Row(Row {
label: "bar".to_owned(),
entries: HashMap::new(),
- }
+ })
]
);
assert_eq!(
read_rows(&b"foo \n bar \n"[..])
.flatten()
.collect::<Vec<_>>(),
- vec![Row {
+ vec![Rowlike::Row(Row {
label: "foo".to_owned(),
entries: HashMap::from([("bar".to_owned(), vec![None])]),
- }]
+ })]
);
let bad = read_rows(&b" foo"[..]).next().unwrap();
assert_eq!(
render_row(
&["foo".to_owned()],
- &mut Row {
+ &mut Rowlike::Row(Row {
label: "nope".to_owned(),
entries: HashMap::from([("bar".to_owned(), vec![None])]),
- }
+ })
),
HTML::from(
- r#"<tr><th id="nope">nope</th><td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td><td onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')">bar</td></tr>
+ r#"<tr><th id="nope">nope</th><td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')">bar</td></tr>
"#
)
);
projects / tablify / blobdiff