git.scottworley.com Git - tablify/blob - src/lib.rs

   1 use std::borrow::ToOwned;
   2 use std::collections::{HashMap, HashSet};
   3 use std::fmt::Write;
   4 use std::io::BufRead;
   5 use std::iter::Iterator;
   6
   7 #[derive(PartialEq, Eq, Debug)]
   8 struct Config {
   9     column_threshold: usize,
  10     static_columns: Vec<Option<String>>,
  11 }
  12 impl Config {
  13     fn apply_command(&mut self, line_num: usize, cmd: &str) -> Result<(), std::io::Error> {
  14         if let Some(threshold) = cmd.strip_prefix("col_threshold ") {
  15             self.column_threshold = threshold.parse().map_err(|e| {
  16                 std::io::Error::new(
  17                     std::io::ErrorKind::InvalidInput,
  18                     format!("line {line_num}: col_threshold must be numeric: {e}"),
  19                 )
  20             })?;
  21         } else if let Some(col) = cmd.strip_prefix("col ") {
  22             self.static_columns.push(Some(col.to_owned()));
  23         } else if cmd == "colsep" {
  24             self.static_columns.push(None);
  25         } else {
  26             return Err(std::io::Error::new(
  27                 std::io::ErrorKind::InvalidInput,
  28                 format!("line {line_num}: Unknown command: {cmd}"),
  29             ));
  30         }
  31         Ok(())
  32     }
  33 }
  34
  35 const HEADER: &str = r#"<!DOCTYPE html>
  36 <html>
  37 <head>
  38   <meta charset="utf-8">
  39   <meta name="viewport" content="width=device-width, initial-scale=1">
  40   <style>
  41     td { text-align: center; }
  42     /* h/t https://wabain.github.io/2019/10/13/css-rotated-table-header.html */
  43     th, td { white-space: nowrap; }
  44     th { text-align: left; font-weight: normal; }
  45     th.spacer_row { height: .3em; }
  46     .spacer_col { border: none; width: .2em; }
  47     table { border-collapse: collapse }
  48     tr.key > th { height: 10em; vertical-align: bottom; line-height: 1 }
  49     tr.key > th > div { width: 1em; }
  50     tr.key > th > div > div { width: 5em; transform-origin: bottom left; transform: translateX(1em) rotate(-65deg) }
  51     td { border: thin solid gray; }
  52     td.leftover { text-align: left; border: none; padding-left: .4em; }
  53     td.yes { border: thin solid gray; background-color: #ddd; }
  54     /* h/t https://stackoverflow.com/questions/5687035/css-bolding-some-text-without-changing-its-containers-size/46452396#46452396 */
  55     .highlight { text-shadow: -0.06ex 0 black, 0.06ex 0 black; }
  56   </style>
  57   <script>
  58     function highlight(id)       { const e = document.getElementById(id); if (e) { e.classList.add(   "highlight"); } }
  59     function clear_highlight(id) { const e = document.getElementById(id); if (e) { e.classList.remove("highlight"); } }
  60     function h2(a, b)  {       highlight(a);       highlight(b); }
  61     function ch2(a, b) { clear_highlight(a); clear_highlight(b); }
  62   </script>
  63 </head>
  64 <body>
  65   <table>
  66     <tbody>
  67 "#;
  68 const FOOTER: &str = "    </tbody>
  69   </table>
  70 </body>
  71 </html>";
  72
  73 #[derive(PartialEq, Eq, Debug)]
  74 pub struct HTML(String);
  75 impl HTML {
  76     fn escape(value: &str) -> HTML {
  77         let mut escaped: String = String::new();
  78         for c in value.chars() {
  79             match c {
  80                 '>' => escaped.push_str("&gt;"),
  81                 '<' => escaped.push_str("&lt;"),
  82                 '\'' => escaped.push_str("&#39;"),
  83                 '"' => escaped.push_str("&quot;"),
  84                 '&' => escaped.push_str("&amp;"),
  85                 ok_c => escaped.push(ok_c),
  86             }
  87         }
  88         HTML(escaped)
  89     }
  90 }
  91 impl From<&str> for HTML {
  92     fn from(value: &str) -> HTML {
  93         HTML(String::from(value))
  94     }
  95 }
  96 impl FromIterator<HTML> for HTML {
  97     fn from_iter<T>(iter: T) -> HTML
  98     where
  99         T: IntoIterator<Item = HTML>,
 100     {
 101         HTML(iter.into_iter().map(|html| html.0).collect::<String>())
 102     }
 103 }
 104 impl std::fmt::Display for HTML {
 105     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
 106         write!(f, "{}", self.0)
 107     }
 108 }
 109
 110 #[derive(Debug, PartialEq, Eq)]
 111 enum InputLine<'a> {
 112     Blank,
 113     RowHeader(&'a str),
 114     Entry(&'a str, Option<&'a str>),
 115     Command(&'a str),
 116 }
 117 impl<'a> From<&'a str> for InputLine<'a> {
 118     fn from(value: &'a str) -> InputLine<'a> {
 119         let trimmed = value.trim_end();
 120         if trimmed.is_empty() {
 121             InputLine::Blank
 122         } else if let Some(cmd) = trimmed.strip_prefix('!') {
 123             InputLine::Command(cmd)
 124         } else if !trimmed.starts_with(' ') {
 125             InputLine::RowHeader(value.trim())
 126         } else {
 127             match value.split_once(':') {
 128                 None => InputLine::Entry(value.trim(), None),
 129                 Some((col, instance)) => InputLine::Entry(col.trim(), Some(instance.trim())),
 130             }
 131         }
 132     }
 133 }
 134
 135 #[derive(Debug, PartialEq, Eq)]
 136 struct Row {
 137     label: String,
 138     entries: HashMap<String, Vec<Option<String>>>,
 139 }
 140
 141 #[derive(Debug, PartialEq, Eq)]
 142 enum Rowlike {
 143     Row(Row),
 144     Spacer,
 145 }
 146
 147 struct Reader<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> {
 148     input: std::iter::Enumerate<Input>,
 149     row: Option<Row>,
 150     config: &'cfg mut Config,
 151 }
 152 impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Reader<'cfg, Input> {
 153     fn new(config: &'cfg mut Config, input: Input) -> Self {
 154         Self {
 155             input: input.enumerate(),
 156             row: None,
 157             config,
 158         }
 159     }
 160 }
 161 impl<'cfg, Input: Iterator<Item = Result<String, std::io::Error>>> Iterator
 162     for Reader<'cfg, Input>
 163 {
 164     type Item = Result<Rowlike, std::io::Error>;
 165     fn next(&mut self) -> Option<Self::Item> {
 166         loop {
 167             match self.input.next() {
 168                 None => return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose(),
 169                 Some((_, Err(e))) => return Some(Err(e)),
 170                 Some((n, Ok(line))) => match InputLine::from(line.as_ref()) {
 171                     InputLine::Command(cmd) => {
 172                         if let Err(e) = self.config.apply_command(n + 1, cmd) {
 173                             return Some(Err(e));
 174                         }
 175                     }
 176                     InputLine::Blank if self.row.is_some() => {
 177                         return Ok(std::mem::take(&mut self.row).map(Rowlike::Row)).transpose()
 178                     }
 179                     InputLine::Blank => return Some(Ok(Rowlike::Spacer)),
 180                     InputLine::Entry(col, instance) => match &mut self.row {
 181                         None => {
 182                             return Some(Err(std::io::Error::other(format!(
 183                                 "line {}: Entry with no header",
 184                                 n + 1
 185                             ))))
 186                         }
 187                         Some(ref mut row) => {
 188                             row.entries
 189                                 .entry(col.to_owned())
 190                                 .and_modify(|is| is.push(instance.map(ToOwned::to_owned)))
 191                                 .or_insert_with(|| vec![instance.map(ToOwned::to_owned)]);
 192                         }
 193                     },
 194                     InputLine::RowHeader(row) => {
 195                         let prev = std::mem::take(&mut self.row);
 196                         self.row = Some(Row {
 197                             label: row.to_owned(),
 198                             entries: HashMap::new(),
 199                         });
 200                         if prev.is_some() {
 201                             return Ok(prev.map(Rowlike::Row)).transpose();
 202                         }
 203                     }
 204                 },
 205             }
 206         }
 207     }
 208 }
 209
 210 fn read_input(input: impl std::io::Read) -> Result<(Vec<Rowlike>, Config), std::io::Error> {
 211     let mut config = Config {
 212         column_threshold: 2,
 213         static_columns: vec![],
 214     };
 215     let reader = Reader::new(&mut config, std::io::BufReader::new(input).lines());
 216     reader
 217         .collect::<Result<Vec<_>, _>>()
 218         .map(|rows| (rows, config))
 219 }
 220
 221 fn column_counts(rows: &[Rowlike]) -> Vec<(usize, String)> {
 222     let empty = HashMap::new();
 223     let mut counts: Vec<_> = rows
 224         .iter()
 225         .flat_map(|rl| match rl {
 226             Rowlike::Row(r) => r.entries.keys(),
 227             Rowlike::Spacer => empty.keys(),
 228         })
 229         .fold(HashMap::new(), |mut cs, col| {
 230             cs.entry(col.to_owned())
 231                 .and_modify(|n| *n += 1)
 232                 .or_insert(1);
 233             cs
 234         })
 235         .into_iter()
 236         .map(|(col, n)| (n, col))
 237         .collect();
 238     counts.sort_unstable_by(|(an, acol), (bn, bcol)| bn.cmp(an).then(acol.cmp(bcol)));
 239     counts
 240 }
 241 fn column_order(config: &Config, rows: &[Rowlike]) -> Vec<String> {
 242     let static_columns: HashSet<&str> = config
 243         .static_columns
 244         .iter()
 245         .flatten()
 246         .map(std::string::String::as_str)
 247         .collect();
 248     column_counts(rows)
 249         .into_iter()
 250         .filter_map(|(n, col)| {
 251             (n >= config.column_threshold && !static_columns.contains(col.as_str())).then_some(col)
 252         })
 253         .collect()
 254 }
 255
 256 fn render_one_instance(instance: &Option<String>) -> HTML {
 257     match instance {
 258         None => HTML::from("✓"),
 259         Some(instance) => HTML::escape(instance.as_ref()),
 260     }
 261 }
 262
 263 fn render_instances(instances: &[Option<String>]) -> HTML {
 264     let all_empty = instances.iter().all(Option::is_none);
 265     if all_empty && instances.len() == 1 {
 266         HTML::from("")
 267     } else if all_empty {
 268         HTML(format!("{}", instances.len()))
 269     } else {
 270         HTML(
 271             instances
 272                 .iter()
 273                 .map(render_one_instance)
 274                 .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
 275                 .collect::<Vec<_>>()
 276                 .join(" "),
 277         )
 278     }
 279 }
 280
 281 fn render_cell(col: &str, row: &mut Row) -> HTML {
 282     let row_label = HTML::escape(row.label.as_ref());
 283     let col_label = HTML::escape(col);
 284     let instances: Option<&Vec<Option<String>>> = row.entries.get(col);
 285     let class = HTML::from(if instances.is_none() { "" } else { "yes" });
 286     let contents = match instances {
 287         None => HTML::from(""),
 288         Some(is) => render_instances(is),
 289     };
 290     row.entries.remove(col);
 291     HTML(format!(
 292         r#"<td class="{class}" onmouseover="h2('{row_label}','{col_label}')" onmouseout="ch2('{row_label}','{col_label}')">{contents}</td>"#
 293     ))
 294 }
 295
 296 fn render_leftover(notcol: &str, instances: &[Option<String>]) -> HTML {
 297     let label = HTML::escape(notcol);
 298     let rest = render_instances(instances);
 299     if rest == HTML::from("") {
 300         HTML(format!("{label}"))
 301     } else {
 302         HTML(format!("{label}: {rest}"))
 303     }
 304 }
 305
 306 fn render_all_leftovers(row: &Row) -> HTML {
 307     let mut order: Vec<_> = row.entries.keys().collect();
 308     order.sort_unstable();
 309     HTML(
 310         order
 311             .into_iter()
 312             .map(|notcol| render_leftover(notcol, row.entries.get(notcol).expect("Key vanished?!")))
 313             .map(|html| html.0) // Waiting for slice_concat_trait to stabilize
 314             .collect::<Vec<_>>()
 315             .join(", "),
 316     )
 317 }
 318
 319 fn render_row(config: &Config, columns: &[String], rowlike: &mut Rowlike) -> HTML {
 320     match rowlike {
 321         Rowlike::Spacer => HTML::from("<tr><th class=\"spacer_row\"></th></tr>\n"),
 322         Rowlike::Row(row) => {
 323             let row_label = HTML::escape(row.label.as_ref());
 324             let static_cells = config
 325                 .static_columns
 326                 .iter()
 327                 .map(|ocol| match ocol {
 328                     Some(col) => render_cell(col, row),
 329                     None => HTML::from(r#"<td class="spacer_col"></td>"#),
 330                 })
 331                 .collect::<HTML>();
 332             let dynamic_cells = columns
 333                 .iter()
 334                 .map(|col| render_cell(col, row))
 335                 .collect::<HTML>();
 336             let leftovers = render_all_leftovers(row);
 337             HTML(format!(
 338                 "<tr><th id=\"{row_label}\">{row_label}</th>{static_cells}{dynamic_cells}<td class=\"leftover\" onmouseover=\"highlight('{row_label}')\" onmouseout=\"clear_highlight('{row_label}')\">{leftovers}</td></tr>\n"
 339             ))
 340         }
 341     }
 342 }
 343
 344 fn render_column_headers(config: &Config, columns: &[String]) -> HTML {
 345     let static_columns = config.static_columns.iter().map(|oc| oc.as_ref());
 346     let dynamic_columns = columns.iter().map(Some);
 347     HTML(
 348         String::from(r#"<tr class="key"><th></th>"#)
 349             + &static_columns
 350                 .chain(dynamic_columns)
 351                 .fold(String::new(), |mut acc, ocol| {
 352                     match ocol {
 353                         Some(col) => {
 354                             let col_header = HTML::escape(col);
 355                             write!(
 356                                 &mut acc,
 357                                 r#"<th id="{col_header}"><div><div>{col_header}</div></div></th>"#
 358                             )
 359                         }
 360                         None => write!(&mut acc, r#"<th class="col_spacer"></th>"#),
 361                     }
 362                     .unwrap();
 363                     acc
 364                 })
 365             + "</tr>\n",
 366     )
 367 }
 368
 369 /// # Errors
 370 ///
 371 /// Will return `Err` if
 372 ///   * there's an i/o error while reading `input`
 373 ///   * the log has invalid syntax:
 374 ///     * an indented line with no preceding non-indented line
 375 pub fn tablify(input: impl std::io::Read) -> Result<HTML, std::io::Error> {
 376     let (rows, config) = read_input(input)?;
 377     let columns = column_order(&config, &rows);
 378     Ok(HTML(format!(
 379         "{HEADER}{}{}{FOOTER}",
 380         render_column_headers(&config, &columns),
 381         rows.into_iter()
 382             .map(|mut r| render_row(&config, &columns, &mut r))
 383             .collect::<HTML>()
 384     )))
 385 }
 386
 387 #[cfg(test)]
 388 mod tests {
 389     use super::*;
 390
 391     #[test]
 392     fn test_parse_line() {
 393         assert_eq!(InputLine::from(""), InputLine::Blank);
 394         assert_eq!(InputLine::from(" "), InputLine::Blank);
 395         assert_eq!(InputLine::from("foo"), InputLine::RowHeader("foo"));
 396         assert_eq!(InputLine::from("foo "), InputLine::RowHeader("foo"));
 397         assert_eq!(InputLine::from(" foo"), InputLine::Entry("foo", None));
 398         assert_eq!(
 399             InputLine::from(" foo:bar"),
 400             InputLine::Entry("foo", Some("bar"))
 401         );
 402         assert_eq!(
 403             InputLine::from(" foo: bar"),
 404             InputLine::Entry("foo", Some("bar"))
 405         );
 406         assert_eq!(
 407             InputLine::from(" foo: bar "),
 408             InputLine::Entry("foo", Some("bar"))
 409         );
 410         assert_eq!(
 411             InputLine::from(" foo:  bar "),
 412             InputLine::Entry("foo", Some("bar"))
 413         );
 414         assert_eq!(
 415             InputLine::from(" foo :  bar "),
 416             InputLine::Entry("foo", Some("bar"))
 417         );
 418     }
 419
 420     fn read_rows(input: impl std::io::Read) -> Result<Vec<Rowlike>, std::io::Error> {
 421         read_input(input).map(|(rows, _)| rows)
 422     }
 423     fn read_config(input: impl std::io::Read) -> Result<Config, std::io::Error> {
 424         read_input(input).map(|(_, config)| config)
 425     }
 426     #[test]
 427     fn test_read_rows() {
 428         assert_eq!(
 429             read_rows(&b"foo"[..]).unwrap(),
 430             vec![Rowlike::Row(Row {
 431                 label: "foo".to_owned(),
 432                 entries: HashMap::new(),
 433             })]
 434         );
 435         assert_eq!(
 436             read_rows(&b"bar"[..]).unwrap(),
 437             vec![Rowlike::Row(Row {
 438                 label: "bar".to_owned(),
 439                 entries: HashMap::new(),
 440             })]
 441         );
 442         assert_eq!(
 443             read_rows(&b"foo\nbar\n"[..]).unwrap(),
 444             vec![
 445                 Rowlike::Row(Row {
 446                     label: "foo".to_owned(),
 447                     entries: HashMap::new(),
 448                 }),
 449                 Rowlike::Row(Row {
 450                     label: "bar".to_owned(),
 451                     entries: HashMap::new(),
 452                 })
 453             ]
 454         );
 455         assert_eq!(
 456             read_rows(&b"foo\n bar\n"[..]).unwrap(),
 457             vec![Rowlike::Row(Row {
 458                 label: "foo".to_owned(),
 459                 entries: HashMap::from([("bar".to_owned(), vec![None])]),
 460             })]
 461         );
 462         assert_eq!(
 463             read_rows(&b"foo\n bar\n baz\n"[..]).unwrap(),
 464             vec![Rowlike::Row(Row {
 465                 label: "foo".to_owned(),
 466                 entries: HashMap::from([
 467                     ("bar".to_owned(), vec![None]),
 468                     ("baz".to_owned(), vec![None])
 469                 ]),
 470             })]
 471         );
 472         assert_eq!(
 473             read_rows(&b"foo\n\nbar\n"[..]).unwrap(),
 474             vec![
 475                 Rowlike::Row(Row {
 476                     label: "foo".to_owned(),
 477                     entries: HashMap::new(),
 478                 }),
 479                 Rowlike::Row(Row {
 480                     label: "bar".to_owned(),
 481                     entries: HashMap::new(),
 482                 })
 483             ]
 484         );
 485         assert_eq!(
 486             read_rows(&b"foo\n\n\nbar\n"[..]).unwrap(),
 487             vec![
 488                 Rowlike::Row(Row {
 489                     label: "foo".to_owned(),
 490                     entries: HashMap::new(),
 491                 }),
 492                 Rowlike::Spacer,
 493                 Rowlike::Row(Row {
 494                     label: "bar".to_owned(),
 495                     entries: HashMap::new(),
 496                 })
 497             ]
 498         );
 499         assert_eq!(
 500             read_rows(&b"foo\n \nbar\n"[..]).unwrap(),
 501             vec![
 502                 Rowlike::Row(Row {
 503                     label: "foo".to_owned(),
 504                     entries: HashMap::new(),
 505                 }),
 506                 Rowlike::Row(Row {
 507                     label: "bar".to_owned(),
 508                     entries: HashMap::new(),
 509                 })
 510             ]
 511         );
 512         assert_eq!(
 513             read_rows(&b"foo  \n bar  \n"[..]).unwrap(),
 514             vec![Rowlike::Row(Row {
 515                 label: "foo".to_owned(),
 516                 entries: HashMap::from([("bar".to_owned(), vec![None])]),
 517             })]
 518         );
 519
 520         let bad = read_rows(&b" foo"[..]);
 521         assert!(bad.is_err());
 522         assert!(format!("{bad:?}").contains("line 1: Entry with no header"));
 523
 524         let bad2 = read_rows(&b"foo\n\n bar"[..]);
 525         assert!(bad2.is_err());
 526         assert!(format!("{bad2:?}").contains("line 3: Entry with no header"));
 527     }
 528
 529     #[test]
 530     fn test_read_config() {
 531         assert_eq!(
 532             read_config(&b"!col_threshold 10"[..])
 533                 .unwrap()
 534                 .column_threshold,
 535             10
 536         );
 537         assert_eq!(
 538             read_config(&b"!col foo"[..]).unwrap().static_columns,
 539             vec![Some("foo".to_owned())]
 540         );
 541
 542         let bad_command = read_config(&b"!no such command"[..]);
 543         assert!(bad_command.is_err());
 544         assert!(format!("{bad_command:?}").contains("line 1: Unknown command"));
 545
 546         let bad_num = read_config(&b"!col_threshold foo"[..]);
 547         assert!(bad_num.is_err());
 548         assert!(format!("{bad_num:?}").contains("line 1: col_threshold must be numeric"));
 549     }
 550
 551     #[test]
 552     fn test_column_counts() {
 553         assert_eq!(
 554             column_counts(&read_rows(&b"foo\n bar\n baz\n"[..]).unwrap()),
 555             vec![(1, String::from("bar")), (1, String::from("baz"))]
 556         );
 557         assert_eq!(
 558             column_counts(&read_rows(&b"foo\n bar\n baz\nquux\n baz"[..]).unwrap()),
 559             vec![(2, String::from("baz")), (1, String::from("bar"))]
 560         );
 561         assert_eq!(
 562             column_counts(&read_rows(&b"foo\n bar\n bar\n baz\n bar\nquux\n baz"[..]).unwrap()),
 563             vec![(2, String::from("baz")), (1, String::from("bar"))]
 564         );
 565         assert_eq!(
 566             column_counts(
 567                 &read_rows(&b"foo\n bar: 1\n bar: 2\n baz\n bar\nquux\n baz"[..]).unwrap()
 568             ),
 569             vec![(2, String::from("baz")), (1, String::from("bar"))]
 570         );
 571     }
 572
 573     #[test]
 574     fn test_render_cell() {
 575         assert_eq!(
 576             render_cell(
 577                 "foo",
 578                 &mut Row {
 579                     label: "nope".to_owned(),
 580                     entries: HashMap::new(),
 581                 }
 582             ),
 583             HTML::from(
 584                 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 585             )
 586         );
 587         assert_eq!(
 588             render_cell(
 589                 "foo",
 590                 &mut Row {
 591                     label: "nope".to_owned(),
 592                     entries: HashMap::from([("bar".to_owned(), vec![None])]),
 593                 }
 594             ),
 595             HTML::from(
 596                 r#"<td class="" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 597             )
 598         );
 599         assert_eq!(
 600             render_cell(
 601                 "foo",
 602                 &mut Row {
 603                     label: "nope".to_owned(),
 604                     entries: HashMap::from([("foo".to_owned(), vec![None])]),
 605                 }
 606             ),
 607             HTML::from(
 608                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')"></td>"#
 609             )
 610         );
 611         assert_eq!(
 612             render_cell(
 613                 "foo",
 614                 &mut Row {
 615                     label: "nope".to_owned(),
 616                     entries: HashMap::from([("foo".to_owned(), vec![None, None])]),
 617                 }
 618             ),
 619             HTML::from(
 620                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">2</td>"#
 621             )
 622         );
 623         assert_eq!(
 624             render_cell(
 625                 "foo",
 626                 &mut Row {
 627                     label: "nope".to_owned(),
 628                     entries: HashMap::from([(
 629                         "foo".to_owned(),
 630                         vec![Some("5".to_owned()), Some("10".to_owned())]
 631                     )]),
 632                 }
 633             ),
 634             HTML::from(
 635                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 10</td>"#
 636             )
 637         );
 638         assert_eq!(
 639             render_cell(
 640                 "foo",
 641                 &mut Row {
 642                     label: "nope".to_owned(),
 643                     entries: HashMap::from([("foo".to_owned(), vec![Some("5".to_owned()), None])]),
 644                 }
 645             ),
 646             HTML::from(
 647                 r#"<td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">5 ✓</td>"#
 648             )
 649         );
 650         assert_eq!(
 651             render_cell(
 652                 "heart",
 653                 &mut Row {
 654                     label: "nope".to_owned(),
 655                     entries: HashMap::from([("heart".to_owned(), vec![Some("<3".to_owned())])]),
 656                 }
 657             ),
 658             HTML::from(
 659                 r#"<td class="yes" onmouseover="h2('nope','heart')" onmouseout="ch2('nope','heart')">&lt;3</td>"#
 660             )
 661         );
 662         assert_eq!(
 663             render_cell(
 664                 "foo",
 665                 &mut Row {
 666                     label: "bob's".to_owned(),
 667                     entries: HashMap::from([("foo".to_owned(), vec![None])]),
 668                 }
 669             ),
 670             HTML::from(
 671                 r#"<td class="yes" onmouseover="h2('bob&#39;s','foo')" onmouseout="ch2('bob&#39;s','foo')"></td>"#
 672             )
 673         );
 674         let mut r = Row {
 675             label: "nope".to_owned(),
 676             entries: HashMap::from([
 677                 ("foo".to_owned(), vec![None]),
 678                 ("baz".to_owned(), vec![None]),
 679             ]),
 680         };
 681         assert_eq!(r.entries.len(), 2);
 682         render_cell("foo", &mut r);
 683         assert_eq!(r.entries.len(), 1);
 684         render_cell("bar", &mut r);
 685         assert_eq!(r.entries.len(), 1);
 686         render_cell("baz", &mut r);
 687         assert_eq!(r.entries.len(), 0);
 688     }
 689
 690     #[test]
 691     fn test_render_leftovers() {
 692         assert_eq!(
 693             render_all_leftovers(&Row {
 694                 label: "nope".to_owned(),
 695                 entries: HashMap::from([("foo".to_owned(), vec![None])]),
 696             }),
 697             HTML::from("foo")
 698         );
 699         assert_eq!(
 700             render_all_leftovers(&Row {
 701                 label: "nope".to_owned(),
 702                 entries: HashMap::from([
 703                     ("foo".to_owned(), vec![None]),
 704                     ("bar".to_owned(), vec![None])
 705                 ]),
 706             }),
 707             HTML::from("bar, foo")
 708         );
 709         assert_eq!(
 710             render_all_leftovers(&Row {
 711                 label: "nope".to_owned(),
 712                 entries: HashMap::from([
 713                     ("foo".to_owned(), vec![None]),
 714                     ("bar".to_owned(), vec![None, None])
 715                 ]),
 716             }),
 717             HTML::from("bar: 2, foo")
 718         );
 719     }
 720
 721     #[test]
 722     fn test_render_row() {
 723         assert_eq!(
 724             render_row(
 725                 &Config {
 726                     column_threshold: 0,
 727                     static_columns: vec![],
 728                 },
 729                 &["foo".to_owned()],
 730                 &mut Rowlike::Row(Row {
 731                     label: "nope".to_owned(),
 732                     entries: HashMap::from([("bar".to_owned(), vec![None])]),
 733                 })
 734             ),
 735             HTML::from(
 736                 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>
 737 "#
 738             )
 739         );
 740         assert_eq!(
 741             render_row(
 742                 &Config {
 743                     column_threshold: 0,
 744                     static_columns: vec![Some("foo".to_owned()), Some("bar".to_owned())],
 745                 },
 746                 &["baz".to_owned()],
 747                 &mut Rowlike::Row(Row {
 748                     label: "nope".to_owned(),
 749                     entries: HashMap::from([
 750                         ("bar".to_owned(), vec![Some("r".to_owned())]),
 751                         ("baz".to_owned(), vec![Some("z".to_owned())]),
 752                         ("foo".to_owned(), vec![Some("f".to_owned())]),
 753                     ]),
 754                 })
 755             ),
 756             HTML::from(
 757                 r#"<tr><th id="nope">nope</th><td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">f</td><td class="yes" onmouseover="h2('nope','bar')" onmouseout="ch2('nope','bar')">r</td><td class="yes" onmouseover="h2('nope','baz')" onmouseout="ch2('nope','baz')">z</td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')"></td></tr>
 758 "#
 759             )
 760         );
 761         assert_eq!(
 762             render_row(
 763                 &Config {
 764                     column_threshold: 0,
 765                     static_columns: vec![Some("foo".to_owned()), None, Some("bar".to_owned())],
 766                 },
 767                 &[],
 768                 &mut Rowlike::Row(Row {
 769                     label: "nope".to_owned(),
 770                     entries: HashMap::from([
 771                         ("bar".to_owned(), vec![Some("r".to_owned())]),
 772                         ("foo".to_owned(), vec![Some("f".to_owned())]),
 773                     ]),
 774                 })
 775             ),
 776             HTML::from(
 777                 r#"<tr><th id="nope">nope</th><td class="yes" onmouseover="h2('nope','foo')" onmouseout="ch2('nope','foo')">f</td><td class="spacer_col"></td><td class="yes" onmouseover="h2('nope','bar')" onmouseout="ch2('nope','bar')">r</td><td class="leftover" onmouseover="highlight('nope')" onmouseout="clear_highlight('nope')"></td></tr>
 778 "#
 779             )
 780         );
 781     }
 782 }