use furigana for extra examples

3 files changed, 181 insertions, 24 deletions

diff --git a/src/format.rs b/src/format.rs
index 1cdde1b..88c81c3 100644
--- a/src/format.rs
+++ b/src/format.rs
@@ -1,3 +1,4 @@
+use std::collections::HashSet;
 use std::fs;
 
 use anyhow::Result;
@@ -142,32 +143,19 @@ fn format_batch_aux<'a>(
         r#"<details><summary>Extra examples (reading practice)</summary><table class="extratable">"#
     )?;
     for ex in batch.extra_examples.iter() {
-        let mut expl1 = Vec::new();
-        let mut expl2 = Vec::new();
-        for word in ex.expl.split(|c| c == ' ' || c == '~') {
-            let (keb, reb) = expl_clean_word(word);
-            let wchars = Charset::new(keb);
-            if !wchars.intersects(&ex.chars) {
-                continue;
-            }
-            if let Some(ents) = dict_idx.get(keb) {
-                for ent in ents.iter() {
-                    if let Some(s) = dict_str_short(keb, reb, ent) {
-                        if wchars.intersects(&batch.chars) {
-                            expl1.push(s);
-                        } else {
-                            expl2.push(s);
-                        }
-                    }
-                }
-            }
-        }
-        expl1.extend(expl2.into_iter());
-        let expl = expl1.join("<br />");
+        let furi = format_ex_furigana(dict_idx, ex);
+        // println!(
+        //     "FURIGANA: {}\n       => {}",
+        //     ex.ja,
+        //     format_ex_furigana(dict_idx, ex)
+        // );
         writeln!(
             f,
-            r#"<tr><td><details><summary class="tab_large2 font_ja">&nbsp;&nbsp;{}&nbsp;&nbsp;</summary><div style="text-align: center">{}<br />{}</div></details></td></tr>"#,
-            ex.ja, ex.en, expl
+            r#"<tr><td><div class="extra_example"><div class="extra_ja font_ja">{}</div><div class="extra_en">{}</div></div></td></tr>"#,
+            furi.replace("[[", "<ruby>")
+                .replace("||", "<rt>")
+                .replace("]]", "</rt></ruby>"),
+            ex.en
         )?;
     }
     writeln!(f, r#"</table></details>"#)?;
@@ -199,6 +187,151 @@ fn format_vocab(f: &mut impl Write, vocab: &[&JlptVocab], t: &str) -> Result<()>
     Ok(())
 }
 
+fn format_ex_furigana<'a>(dict_idx: &DictIndex<'a>, ex: &Example) -> String {
+    use std::fmt::Write;
+
+    let mut remainder = ex.ja.as_str();
+    let mut ret = String::new();
+
+    for word in ex.expl.split(|c| c == ' ' || c == '~') {
+        let (keb, reb) = expl_clean_word(word);
+        let word = word
+            .split_once('{')
+            .and_then(|(_, r)| r.split_once('}'))
+            .map(|(p, _)| p)
+            .unwrap_or(keb);
+
+        if let Some(i) = remainder.find(word) {
+            ret += &remainder[..i];
+            remainder = &remainder[i..];
+        }
+
+        let mut new_word = String::new();
+        for c in word.chars() {
+            if remainder.starts_with(c) {
+                remainder = remainder.strip_prefix(c).unwrap();
+                new_word.push(c);
+            } else {
+                eprintln!("!!!! Char {} is not in remainder !!!!", c);
+            }
+        }
+        let word = &new_word;
+
+        if !Charset::new(word).intersects(&ex.chars) {
+            ret += word;
+            continue;
+        }
+
+        let reb = match reb {
+            Some(reb) => reb,
+            None => {
+                let ents = dict_idx.get(keb).map(|x| &x[..]).unwrap_or_default();
+                let matches = ents
+                    .iter()
+                    .map(|ent| {
+                        let r_ele = ent.children().find(|x| x.has_tag_name("r_ele")).unwrap();
+                        let reb = r_ele.children().find(|x| x.has_tag_name("reb")).unwrap();
+                        reb.text().unwrap().trim()
+                    })
+                    .collect::<HashSet<_>>();
+                if matches.len() == 1 {
+                    *matches.iter().next().unwrap()
+                } else {
+                    println!("- word without reb: {}", word);
+                    ret += &word;
+                    continue;
+                }
+            }
+        };
+
+        //println!("+ word: {}, keb: {}, reb: {}", word, keb, reb);
+        let common_cnt = word
+            .chars()
+            .zip(keb.chars())
+            .take_while(|(x, y)| x == y)
+            .count();
+        if common_cnt == 0 {
+            // Strange cases
+            write!(&mut ret, "[[{}||{}]]", word, reb).unwrap();
+            continue;
+        }
+
+        let keb_suffix = keb.chars().skip(common_cnt).collect::<String>();
+        let reb = reb.strip_suffix(&keb_suffix).unwrap_or(reb);
+        //println!("     >> common reb: {}, common_word: {}", reb, word.chars().take(common_cnt).collect::<String>());
+
+        let wchars = Vec::from_iter(word.chars().take(common_cnt));
+        let rchars = Vec::from_iter(reb.chars());
+
+        // We shall invoke Levhenstein distance
+        let mut dynrow0 = vec![(0, 0, 0, false)];
+        for ri in 0..rchars.len() {
+            dynrow0.push((0, ri, 100 + ri + 1, false));
+        }
+        let mut dyntab = vec![dynrow0];
+
+        for (wi, wc) in wchars.iter().enumerate() {
+            let mut dynrow = vec![(wi, 0, 100 + wi + 1, false)];
+
+            for (ri, rc) in rchars.iter().enumerate() {
+                let mut x = vec![];
+                if dyntab[wi][ri + 1].3 {
+                    x.push((wi, ri + 1, dyntab[wi][ri + 1].2 + 1, true));
+                }
+                if dynrow[ri].3 {
+                    x.push((wi + 1, ri, dynrow[ri].2 + 1, true));
+                }
+                if wc == rc {
+                    x.push((wi, ri, dyntab[wi][ri].2, false));
+                } else {
+                    x.push((wi, ri, dyntab[wi][ri].2 + 1, true));
+                }
+                dynrow.push(x.into_iter().min_by_key(|(_, _, w, _)| *w).unwrap());
+            }
+            dyntab.push(dynrow);
+        }
+        //eprintln!("DYN TAB: {:?}", dyntab);
+
+        let mut path = vec![(wchars.len(), rchars.len())];
+        loop {
+            let (wi, ri) = *path.last().unwrap();
+            let (wi2, ri2, _, _) = dyntab[wi][ri];
+            path.push((wi2, ri2));
+            if wi2 == 0 && ri2 == 0 {
+                break;
+            }
+        }
+        path.reverse();
+        //eprintln!("DYN PATH: {:?}", path);
+
+        let mut wbuf = String::new();
+        let mut rbuf = String::new();
+        for ((wi1, ri1), (wi2, ri2)) in path.iter().copied().zip(path.iter().copied().skip(1)) {
+            if wi2 > wi1 && ri2 > ri1 && wchars[wi1] == rchars[ri1] {
+                if !wbuf.is_empty() || !rbuf.is_empty() {
+                    write!(&mut ret, "[[{}||{}]]", wbuf, rbuf).unwrap();
+                    wbuf.clear();
+                    rbuf.clear();
+                }
+                ret.push(wchars[wi1]);
+            } else {
+                if wi2 > wi1 {
+                    wbuf.push(wchars[wi1]);
+                }
+                if ri2 > ri1 {
+                    rbuf.push(rchars[ri1]);
+                }
+            }
+        }
+        if !wbuf.is_empty() || !rbuf.is_empty() {
+            write!(&mut ret, "[[{}||{}]]", wbuf, rbuf).unwrap();
+        }
+
+        ret.extend(word.chars().skip(common_cnt));
+    }
+    ret
+}
+
 fn expl_clean_word(w: &str) -> (&str, Option<&str>) {
     let mut ret = w;
     for delim in ['(', '{', '['] {
diff --git a/src/main.rs b/src/main.rs
index 5d6b7d7..f6f286a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -189,6 +189,8 @@ fn main() {
             batches
                 .iter()
                 .enumerate()
+                //.skip(23)
+                //.take(1)
                 .for_each(|x| format_batch(&jmdict_idx, batches.len(), x));
 
             let kanji_levels = read_kanji_levels().expect("read_kanji_levels");
diff --git a/static/style.css b/static/style.css
index 4c066d9..0b708f6 100644
--- a/static/style.css
+++ b/static/style.css
@@ -99,3 +99,25 @@ details .chars {
 .font_ja {
     font-family: 'MS PGothic', Osaka, Arial, sans-serif;
 }
+
+.extra_example {
+    text-align: center;
+}
+
+.extra_ja {
+    font-size: 1.5em;
+}
+
+.extra_en {
+    margin: 4px;
+    visibility: hidden;
+}
+
+.extra_ja rt {
+    visibility: hidden;
+}
+
+.extra_example:hover .extra_ja rt, .extra_example:hover .extra_en {
+    visibility: visible;
+}
+