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Use a generated image cover instead of a plain text one

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Kovid Goyal 2019-09-19 20:24:38 +05:30
parent 7bef47a452
commit b4fe349df8
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1 changed files with 12 additions and 27 deletions
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39
src/calibre/srv/render_book.py
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@ -19,16 +19,13 @@ from css_parser.css import CSSRule
from calibre import force_unicode, prepare_string_for_xml from calibre import force_unicode, prepare_string_for_xml
from calibre.ebooks import parse_css_length from calibre.ebooks import parse_css_length
from calibre.ebooks.css_transform_rules import StyleDeclaration from calibre.ebooks.css_transform_rules import StyleDeclaration
from calibre.ebooks.metadata import authors_to_string
from calibre.ebooks.oeb.base import ( from calibre.ebooks.oeb.base import (
EPUB_NS, OEB_DOCS, OEB_STYLES, OPF, XHTML, XHTML_NS, XLINK, XPath, rewrite_links, EPUB_NS, OEB_DOCS, OEB_STYLES, OPF, XHTML, XHTML_NS, XLINK, XPath, rewrite_links,
urlunquote urlunquote
) )
from calibre.ebooks.oeb.iterator.book import extract_book from calibre.ebooks.oeb.iterator.book import extract_book
from calibre.ebooks.oeb.polish.container import Container as ContainerBase from calibre.ebooks.oeb.polish.container import Container as ContainerBase
from calibre.ebooks.oeb.polish.cover import ( from calibre.ebooks.oeb.polish.cover import find_cover_image, set_epub_cover
find_cover_image, find_cover_page, set_epub_cover
)
from calibre.ebooks.oeb.polish.css import transform_css from calibre.ebooks.oeb.polish.css import transform_css
from calibre.ebooks.oeb.polish.toc import get_landmarks, get_toc from calibre.ebooks.oeb.polish.toc import get_landmarks, get_toc
from calibre.ebooks.oeb.polish.utils import extract, guess_type from calibre.ebooks.oeb.polish.utils import extract, guess_type
@ -269,14 +266,19 @@ class Container(ContainerBase):
} }
</style></head><body><img src="%s"/></body></html> </style></head><body><img src="%s"/></body></html>
''' '''
blank = {'q': False}
if input_fmt == 'epub':
if not find_cover_page(self) and not find_cover_image(self):
blank['q'] = True
def generic_cover():
if self.book_metadata is not None:
from calibre.ebooks.covers import create_cover
mi = self.book_metadata
return create_cover(mi.title, mi.authors, mi.series, mi.series_index)
else:
return BLANK_JPEG
if input_fmt == 'epub':
def cover_path(action, data): def cover_path(action, data):
if action == 'write_image': if action == 'write_image':
data.write(BLANK_JPEG) data.write(generic_cover())
raster_cover_name, titlepage_name = set_epub_cover(self, cover_path, (lambda *a: None), options={'template':templ}) raster_cover_name, titlepage_name = set_epub_cover(self, cover_path, (lambda *a: None), options={'template':templ})
else: else:
raster_cover_name = find_cover_image(self, strict=True) raster_cover_name = find_cover_image(self, strict=True)
@ -284,8 +286,7 @@ class Container(ContainerBase):
item = self.generate_item(name='cover.jpeg', id_prefix='cover') item = self.generate_item(name='cover.jpeg', id_prefix='cover')
raster_cover_name = self.href_to_name(item.get('href'), self.opf_name) raster_cover_name = self.href_to_name(item.get('href'), self.opf_name)
with self.open(raster_cover_name, 'wb') as dest: with self.open(raster_cover_name, 'wb') as dest:
dest.write(BLANK_JPEG) dest.write(generic_cover())
blank['q'] = True
item = self.generate_item(name='titlepage.html', id_prefix='titlepage') item = self.generate_item(name='titlepage.html', id_prefix='titlepage')
titlepage_name = self.href_to_name(item.get('href'), self.opf_name) titlepage_name = self.href_to_name(item.get('href'), self.opf_name)
raw = templ % prepare_string_for_xml(self.name_to_href(raster_cover_name, titlepage_name), True) raw = templ % prepare_string_for_xml(self.name_to_href(raster_cover_name, titlepage_name), True)
@ -295,22 +296,6 @@ class Container(ContainerBase):
ref = spine.makeelement(OPF('itemref'), idref=item.get('id')) ref = spine.makeelement(OPF('itemref'), idref=item.get('id'))
self.insert_into_xml(spine, ref, index=0) self.insert_into_xml(spine, ref, index=0)
self.dirty(self.opf_name) self.dirty(self.opf_name)
if blank['q'] and self.book_metadata is not None:
authors = authors_to_string(self.book_metadata.authors)
title = self.book_metadata.title
with self.open(titlepage_name, 'wb') as f:
f.write('''
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head><meta charset="utf-8"/></head>
<body>
<div style="position: fixed; top: 50%; width: 100vw; transform: translateY(-50%)">
<h1 style="text-align: center; margin: auto">{title}</h1>
<p>\xa0</p>
<h3 style="text-align: center; margin: auto; font-style: italic">{authors}</h3>
</div>
</body>
</html>
'''.format(title=title, authors=authors).encode('utf-8'))
return raster_cover_name, titlepage_name return raster_cover_name, titlepage_name
def transform_css(self): def transform_css(self):