sankoku8 bugfix: account for images in headwords

Affects ビャンビャンめん, さんだつ (簒奪), and some words with hypens
such as J-POP and CD-ROM.

bot/entries/sankoku8/base_entry.py

@@ -67,6 +67,7 @@ class BaseEntry(SanseidoEntry):
     def _find_expressions(self, soup):
         expressions = []
         for hyouki in soup.find_all(self._hyouki_name):
+            self._fill_alts(hyouki)
             for expression in parse_hyouki_soup(hyouki, [""]):
                 expressions.append(expression)
         return expressions
@@ -95,3 +96,9 @@ class BaseEntry(SanseidoEntry):
         ]
         for name in unused_nodes:
             Soup.delete_soup_nodes(soup, name)
+
+    @staticmethod
+    def _fill_alts(soup):
+        for img in soup.find_all("img"):
+            if img.has_attr("alt"):
+                img.string = img.attrs["alt"]

bot/entries/sankoku8/preprocess.py

@@ -4,9 +4,17 @@ from bs4 import BeautifulSoup
 from bot.data import get_adobe_glyph
 
 
+__GAIJI = {
+    "svg-gaiji/byan.svg": "𰻞",
+    "svg-gaiji/G16EF.svg": "簒",
+}
+
+
 def preprocess_page(page):
     soup = BeautifulSoup(page, features="xml")
     __replace_glyph_codes(soup)
+    __add_image_alt_text(soup)
+    __replace_tatehyphen(soup)
     page = __strip_page(soup)
     return page
 
@@ -20,6 +28,21 @@ def __replace_glyph_codes(soup):
             geta.replace_with(glyph)
 
 
+def __add_image_alt_text(soup):
+    for img in soup.find_all("img"):
+        if not img.has_attr("src"):
+            continue
+        src = img.attrs["src"]
+        if src in __GAIJI:
+            img.attrs["alt"] = __GAIJI[src]
+
+
+def __replace_tatehyphen(soup):
+    for img in soup.find_all("img", {"src": "svg-gaiji/tatehyphen.svg"}):
+        img.string = "−"
+        img.unwrap()
+
+
 def __strip_page(soup):
     koumoku = soup.find(["項目"])
     if koumoku is not None: