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Use a generated image cover for coverless EPUB files as well

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Kovid Goyal 2019-09-30 19:25:57 +05:30
parent d9d20f0310
commit 6bed097e07
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GPG Key ID: 06BC317B515ACE7C
2 changed files with 24 additions and 8 deletions
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9
src/calibre/ebooks/oeb/polish/cover.py
View File

@ -440,7 +440,7 @@ def remove_cover_image_in_page(container, page, cover_images):
break
def set_epub_cover(container, cover_path, report, options=None):
def set_epub_cover(container, cover_path, report, options=None, image_callback=None):
existing_image = options is not None and options.get('existing_image', False)
if existing_image:
existing_image = cover_path
@ -455,6 +455,7 @@ def set_epub_cover(container, cover_path, report, options=None):
# TODO: Handle possible_removals and also iterate over links in the removed
# pages and handle possibly removing stylesheets referred to by them.
image_callback_called = False
spine_items = tuple(container.spine_items)
if cover_page is None and spine_items:
# Check if the first item in the spine is a simple cover wrapper
@ -490,9 +491,15 @@ def set_epub_cover(container, cover_path, report, options=None):
log('Existing cover page {} is a simple wrapper, removing it'.format(cover_page))
container.remove_item(cover_page)
if wrapped_image != existing_image:
if image_callback is not None and not image_callback_called:
image_callback(cover_image, wrapped_image)
image_callback_called = True
container.remove_item(wrapped_image)
updated = True
if image_callback is not None and not image_callback_called:
image_callback_called = True
image_callback(cover_image, wrapped_image)
if cover_image and cover_image != wrapped_image:
# Remove the old cover image
if cover_image != existing_image:

23
src/calibre/srv/render_book.py
View File

@ -277,10 +277,21 @@ class Container(ContainerBase):
return BLANK_JPEG
if input_fmt == 'epub':
def image_callback(cover_image, wrapped_image):
if cover_image:
image_callback.cover_data = self.raw_data(cover_image, decode=False)
if wrapped_image and not getattr(image_callback, 'cover_data', None):
image_callback.cover_data = self.raw_data(wrapped_image, decode=False)
def cover_path(action, data):
if action == 'write_image':
data.write(generic_cover())
raster_cover_name, titlepage_name = set_epub_cover(self, cover_path, (lambda *a: None), options={'template':templ})
cdata = getattr(image_callback, 'cover_data', None) or generic_cover()
data.write(cdata)
raster_cover_name, titlepage_name = set_epub_cover(
self, cover_path, (lambda *a: None), options={'template':templ},
image_callback=image_callback)
else:
raster_cover_name = find_cover_image(self, strict=True)
if raster_cover_name is None:
@ -611,18 +622,16 @@ def render(pathtoebook, output_dir, book_hash=None, serialize_metadata=False, ex
mi = None
if serialize_metadata:
from calibre.ebooks.metadata.meta import get_metadata
with lopen(pathtoebook, 'rb') as f:
from calibre.customize.ui import quick_metadata
with lopen(pathtoebook, 'rb') as f, quick_metadata:
mi = get_metadata(f, os.path.splitext(pathtoebook)[1][1:].lower())
container = Container(pathtoebook, output_dir, book_hash=book_hash, save_bookmark_data=extract_annotations, book_metadata=mi)
if serialize_metadata:
from calibre.utils.serialize import json_dumps
from calibre.ebooks.metadata.book.serialize import metadata_as_dict
d = metadata_as_dict(mi)
d.pop('cover_data', None)
serialize_datetimes(d), serialize_datetimes(d.get('user_metadata', {}))
cdata = d.pop('cover_data', None)
if cdata and cdata[1] and container.book_render_data['raster_cover_name']:
with lopen(os.path.join(output_dir, container.book_render_data['raster_cover_name']), 'wb') as f:
f.write(cdata[1])
with lopen(os.path.join(output_dir, 'calibre-book-metadata.json'), 'wb') as f:
f.write(json_dumps(d))
if extract_annotations: