Experiment with PDF generation

Signed-off-by: David Young <davidy@funkypenguin.co.nz>

not_pdf_event_hook/__init__.py

@@ -0,0 +1,56 @@
+import logging
+
+from bs4 import BeautifulSoup
+from mkdocs.structure.pages import Page
+
+
+def inject_link(html: str, href: str,
+                page: Page, logger: logging) -> str:
+    """Adding PDF View button on navigation bar(using material theme)"""
+
+    def _pdf_icon():
+        _ICON = '''
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+<path d="M128,0c-17.6,0-32,14.4-32,32v448c0,17.6,14.4,32,32,32h320c17.6,0,32-14.4,32-32V128L352,0H128z" fill="#E2E5E7"/>
+<path d="m384 128h96l-128-128v96c0 17.6 14.4 32 32 32z" fill="#B0B7BD"/>
+<polygon points="480 224 384 128 480 128" fill="#CAD1D8"/>
+<path d="M416,416c0,8.8-7.2,16-16,16H48c-8.8,0-16-7.2-16-16V256c0-8.8,7.2-16,16-16h352c8.8,0,16,7.2,16,16  V416z" fill="#F15642"/>
+<g fill="#fff">
+<path d="m101.74 303.15c0-4.224 3.328-8.832 8.688-8.832h29.552c16.64 0 31.616 11.136 31.616 32.48 0 20.224-14.976 31.488-31.616 31.488h-21.36v16.896c0 5.632-3.584 8.816-8.192 8.816-4.224 0-8.688-3.184-8.688-8.816v-72.032zm16.88 7.28v31.872h21.36c8.576 0 15.36-7.568 15.36-15.504 0-8.944-6.784-16.368-15.36-16.368h-21.36z"/>
+<path d="m196.66 384c-4.224 0-8.832-2.304-8.832-7.92v-72.672c0-4.592 4.608-7.936 8.832-7.936h29.296c58.464 0 57.184 88.528 1.152 88.528h-30.448zm8.064-72.912v57.312h21.232c34.544 0 36.08-57.312 0-57.312h-21.232z"/>
+<path d="m303.87 312.11v20.336h32.624c4.608 0 9.216 4.608 9.216 9.072 0 4.224-4.608 7.68-9.216 7.68h-32.624v26.864c0 4.48-3.184 7.92-7.664 7.92-5.632 0-9.072-3.44-9.072-7.92v-72.672c0-4.592 3.456-7.936 9.072-7.936h44.912c5.632 0 8.96 3.344 8.96 7.936 0 4.096-3.328 8.704-8.96 8.704h-37.248v0.016z"/>
+</g>
+<path d="m400 432h-304v16h304c8.8 0 16-7.2 16-16v-16c0 8.8-7.2 16-16 16z" fill="#CAD1D8"/>
+</svg>
+'''  # noqa: E501
+        return BeautifulSoup(_ICON, 'html.parser')
+
+    logger.info('(hook on inject_link: %s)', page.title)
+    soup = BeautifulSoup(html, 'html.parser')
+
+    nav = soup.find(class_='md-header-nav')
+    if not nav:
+        # after 7.x
+        nav = soup.find('nav', class_='md-header__inner')
+    if nav:
+        a = soup.new_tag('a', href=href, title='PDF',
+                         **{'class': 'md-header-nav__button md-icon'})
+        a.append(_pdf_icon())
+        nav.append(a)
+        return str(soup)
+
+    return html
+
+
+# def pre_js_render(soup: BeautifulSoup, logger: logging) -> BeautifulSoup:
+#     logger.info('(hook on pre_js_render)')
+#     return soup
+
+
+# def pre_pdf_render(soup: BeautifulSoup, logger: logging) -> BeautifulSoup:
+#     logger.info('(hook on pre_pdf_render)')
+#     tag = soup.find(lambda tag: tag.name ==
+#                     'body' and 'data-md-color-scheme' in tag.attrs)
+#     if tag:
+#         tag['data-md-color-scheme'] = 'print'
+#     return soup