More work on kepubify

src/calibre/ebooks/oeb/polish/kepubify.py

@@ -315,7 +315,7 @@ def add_dummy_title_page(container: Container, cover_image_name: str) -> None:
     __CONTENT__
     </div></div></body></html>
 '''
-    titlepage_name = container.add_file(f'{DUMMY_TITLE_PAGE_NAME}.html', modify_name_if_needed=True)
+    titlepage_name = container.add_file(f'{DUMMY_TITLE_PAGE_NAME}.xhtml', modify_name_if_needed=True, spine_index=0)
     if cover_image_name:
         cover_href = container.name_to_href(cover_image_name, titlepage_name)
         html = html.replace('__CONTENT__', f'<img src="{cover_href}" alt="cover" style="height: 100%" />')
@@ -329,10 +329,11 @@ def add_dummy_title_page(container: Container, cover_image_name: str) -> None:
     with container.open(titlepage_name, 'w') as f:
         f.write(html)
     container.apply_unique_properties(titlepage_name, 'calibre:title-page')
+    return titlepage_name
 
 
 def remove_dummy_title_page(container: Container) -> None:
-    for name, is_linear in container.spine_names():
+    for name, is_linear in container.spine_names:
         if is_linear:
             if DUMMY_TITLE_PAGE_NAME in name:
                 container.remove_item(name)
@@ -400,7 +401,7 @@ def kepubify_path(path, outpath='', max_workers=0, allow_overwrite=False, opts:
     while not allow_overwrite and outpath == path:
         c += 1
         outpath = f'{base} - {c}.kepub'
-    container.commit(output=outpath)
+    container.commit(outpath=outpath)
     return outpath
 
 

src/calibre/ebooks/oeb/polish/tests/base.py

@@ -58,12 +58,7 @@ def add_resources(raw, rmap):
     return raw
 
 
-def get_simple_book(fmt='epub'):
-    cache = get_cache()
-    ans = os.path.join(cache, 'simple.'+fmt)
-    src = os.path.join(os.path.dirname(__file__), 'simple.html')
-    if needs_recompile(ans, src):
-        with TemporaryDirectory('bpt') as tdir, CurrentDir(tdir):
+def setup_simple_book(src):
     with open(src, 'rb') as sf:
         raw = sf.read().decode('utf-8')
     raw = add_resources(raw, {
@@ -76,6 +71,16 @@ def get_simple_book(fmt='epub'):
     x = 'index.html'
     with open(x, 'wb') as f:
         f.write(raw.encode('utf-8'))
+    return x
+
+
+def get_simple_book(fmt='epub'):
+    cache = get_cache()
+    ans = os.path.join(cache, 'simple.'+fmt)
+    src = os.path.join(os.path.dirname(__file__), 'simple.html')
+    if needs_recompile(ans, src):
+        with TemporaryDirectory('bpt') as tdir, CurrentDir(tdir):
+            x = setup_simple_book(src)
             build_book(x, ans, args=[
                 '--level1-toc=//h:h2', '--language=en', '--authors=Kovid Goyal', '--cover=lt.png'])
     return ans
@@ -99,6 +104,29 @@ def get_split_book(fmt='epub'):
     return ans
 
 
+def get_book_for_kepubify(has_cover=True, epub_version='3'):
+    cache = get_cache()
+    ans = os.path.join(cache, f'kepubify-{has_cover}-{epub_version}.epub')
+    src = os.path.join(os.path.dirname(__file__), 'simple.html')
+    if needs_recompile(ans, src):
+        with TemporaryDirectory('bpt') as tdir, CurrentDir(tdir):
+            index_html = setup_simple_book(src)
+            args = ['--level1-toc=//h:h2', '--language=en', '--authors=Kovid Goyal', f'--epub-version={epub_version}']
+            if has_cover:
+                args.append('--cover=lt.png')
+            else:
+                args.append('--no-default-epub-cover')
+            build_book(index_html, ans, args=args)
+    c = pc.get_container(ans)
+    with c.open('page_styles.css', 'r+') as f:
+        css = f.read()
+        css += '\n\ndiv { widows: 13; orphans: 12; color: red; }'
+        f.seek(0), f.truncate(), f.write(css)
+    c.commit()
+
+    return ans
+
+
 devnull = DevNull()
 
 

src/calibre/ebooks/oeb/polish/tests/kepubify.py

@@ -2,13 +2,33 @@
 # License: GPLv3 Copyright: 2025, Kovid Goyal <kovid at kovidgoyal.net>
 
 
-from calibre.ebooks.oeb.polish.kepubify import Options, kepubify_html_data, remove_kobo_markup_from_html, serialize_html
+from calibre.ebooks.oeb.polish.container import get_container
+from calibre.ebooks.oeb.polish.kepubify import DUMMY_TITLE_PAGE_NAME, Options, kepubify_html_data, kepubify_path, remove_kobo_markup_from_html, serialize_html
 from calibre.ebooks.oeb.polish.parsing import parse
-from calibre.ebooks.oeb.polish.tests.base import BaseTest
+from calibre.ebooks.oeb.polish.tests.base import BaseTest, get_book_for_kepubify
 
 
 class KepubifyTests(BaseTest):
 
+    def test_kepubify_container(self):
+        def b(has_cover=True, epub_version='3'):
+            path = get_book_for_kepubify(has_cover=has_cover, epub_version=epub_version)
+            opts = Options()
+            opts = opts._replace(remove_widows_and_orphans=True)
+            opts = opts._replace(remove_at_page_rules=True)
+            outpath = kepubify_path(path, opts=opts, allow_overwrite=True)
+            c = get_container(outpath, tweak_mode=True)
+            spine_names = tuple(n for n, is_linear in c.spine_names)
+            cname = 'titlepage.xhtml' if has_cover else f'{DUMMY_TITLE_PAGE_NAME}.xhtml'
+            self.assertEqual(spine_names, (cname, 'index_split_000.html', 'index_split_001.html'))
+            ps = c.open('page_styles.css', 'r').read()
+            for q in ('@page', 'widows', 'orphans'):
+                self.assertNotIn(q, ps)
+            cimage = ('cover.png',) if has_cover else ()
+            self.assertEqual(cimage, tuple(c.manifest_items_with_property('cover-image')))
+        b()
+        b(has_cover=False)
+
     def test_kepubify_html(self):
         prefix = '''<?xml version='1.0' encoding='utf-8'?>
 <html xmlns="http://www.w3.org/1999/xhtml"><head><style type="text/css" class="kobostylehacks">\