add anchor link to start page

src/epub_converter/epub_converter.py

@@ -284,6 +284,14 @@ class EpubConverter:
             self.adjacency_list[-1].append(nav_point)
             self.hrefs_added_to_toc.add(file)
 
+    @staticmethod
+    def create_new_anchor_span_start_page(soup: BeautifulSoup, id_: str) -> Tag:
+        new_anchor_span = soup.new_tag("span")
+        new_anchor_span.attrs["id"] = id_
+        new_anchor_span.attrs["class"] = "link-anchor-start"
+        new_anchor_span.string = "\xa0"
+        return new_anchor_span
+
     def label_subchapters_with_lc_tag(self):
         for html_href, soup in self.html_href2html_body_soup.items():
             for i in self.html_href2subchapters_ids[html_href]:
@@ -291,6 +299,12 @@ class EpubConverter:
                 # in order not to lose tags in verification of same level in chapter
                 parent_tags = tag.find_parents(['body', 'p', 'span', 'h1', 'h2', 'h3', 'h4', 'h5'])
                 parent_tag = parent_tags[-1] if parent_tags else tag
+
+                # insert link to page
+                new_unique_id = self.create_unique_id(html_href, '')
+                parent_tag.insert_after(self.create_new_anchor_span_start_page(soup, new_unique_id))
+                self.internal_anchors.add(new_unique_id)
+
                 tmp_tag = soup.new_tag("lc_tmp")
                 tmp_tag.attrs["class"] = "converter-chapter-mark"
                 tmp_tag.attrs["id"] = i
@@ -391,8 +405,11 @@ class EpubConverter:
             for href_from_toc in self.hrefs_added_to_toc:
                 for tag in self.html_href2html_body_soup[href_from_toc].find_all(attrs={"id": re.compile(r".+")}):
                     if tag.attrs.get("class") not in ["converter-chapter-mark", "footnote-element"]:
-                        new_unique_id = self.create_unique_id(
-                            href_from_toc, tag.attrs["id"])
+                        if tag.attrs.get("class") == 'link-anchor-start':
+                            new_unique_id = tag.attrs["id"]
+                            tag.attrs["class"] = 'link-anchor'
+                        else: 
+                            new_unique_id = self.create_unique_id(href_from_toc, tag.attrs["id"])
                         tag.attrs["id"] = new_unique_id
 
         def process_file_anchor():