%PDF-
%PDF-
Mini Shell
Mini Shell
#!/usr/bin/env python3
__license__ = 'GPL v3'
__copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
__docformat__ = 'restructuredtext en'
import textwrap
from calibre import guess_type
from calibre.utils.imghdr import identify
from calibre.utils.xml_parse import safe_xml_fromstring
from polyglot.urllib import unquote
class CoverManager:
SVG_TEMPLATE = textwrap.dedent('''\
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="calibre:cover" content="true" />
<title>Cover</title>
<style type="text/css" title="override_css">
@page {padding: 0pt; margin:0pt}
body { text-align: center; padding:0pt; margin: 0pt; }
</style>
</head>
<body>
<div>
<svg version="1.1" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
width="100%%" height="100%%" viewBox="__viewbox__"
preserveAspectRatio="__ar__">
<image width="__width__" height="__height__" xlink:href="%s"/>
</svg>
</div>
</body>
</html>
''')
NONSVG_TEMPLATE = textwrap.dedent('''\
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="calibre:cover" content="true" />
<title>Cover</title>
<style type="text/css" title="override_css">
@page {padding: 0pt; margin:0pt}
body { text-align: center; padding:0pt; margin: 0pt }
div { padding:0pt; margin: 0pt }
img { padding:0pt; margin: 0pt }
</style>
</head>
<body>
<div>
<img src="%s" alt="cover" __style__ />
</div>
</body>
</html>
''')
def __init__(self, no_default_cover=False, no_svg_cover=False,
preserve_aspect_ratio=False, fixed_size=None):
self.no_default_cover = no_default_cover
self.no_svg_cover = no_svg_cover
self.preserve_aspect_ratio = preserve_aspect_ratio
ar = 'xMidYMid meet' if preserve_aspect_ratio else 'none'
self.svg_template = self.SVG_TEMPLATE.replace('__ar__', ar)
if fixed_size is None:
style = 'style="height: 100%%"'
else:
width, height = fixed_size
style = 'style="height: %s; width: %s"'%(height, width)
self.non_svg_template = self.NONSVG_TEMPLATE.replace('__style__',
style)
def __call__(self, oeb, opts, log):
self.oeb = oeb
self.log = log
self.insert_cover()
def default_cover(self):
'''
Create a generic cover for books that dont have a cover
'''
if self.no_default_cover:
return None
self.log('Generating default cover')
m = self.oeb.metadata
title = str(m.title[0])
authors = [str(x) for x in m.creator if x.role == 'aut']
try:
from calibre.ebooks.covers import create_cover
series = series_index = None
if m.series:
try:
series, series_index = str(m.series[0]), m.series_index[0]
except IndexError:
pass
img_data = create_cover(title, authors, series, series_index)
id, href = self.oeb.manifest.generate('cover',
'cover_image.jpg')
item = self.oeb.manifest.add(id, href, guess_type('t.jpg')[0],
data=img_data)
m.clear('cover')
m.add('cover', item.id)
return item.href
except:
self.log.exception('Failed to generate default cover')
return None
def inspect_cover(self, href):
from calibre.ebooks.oeb.base import urlnormalize
for x in self.oeb.manifest:
if x.href == urlnormalize(href):
try:
raw = x.data
return identify(raw)[1:]
except Exception:
self.log.exception('Failed to read cover image dimensions')
return -1, -1
def insert_cover(self):
from calibre.ebooks.oeb.base import urldefrag
g, m = self.oeb.guide, self.oeb.manifest
item = None
if 'titlepage' not in g:
if 'cover' in g:
href = g['cover'].href
else:
href = self.default_cover()
if href is None:
return
width, height = self.inspect_cover(href)
if width == -1 or height == -1:
self.log.warning('Failed to read cover dimensions')
width, height = 600, 800
# if self.preserve_aspect_ratio:
# width, height = 600, 800
self.svg_template = self.svg_template.replace('__viewbox__',
'0 0 %d %d'%(width, height))
self.svg_template = self.svg_template.replace('__width__',
str(width))
self.svg_template = self.svg_template.replace('__height__',
str(height))
if href is not None:
templ = self.non_svg_template if self.no_svg_cover \
else self.svg_template
tp = templ%unquote(href)
id, href = m.generate('titlepage', 'titlepage.xhtml')
item = m.add(id, href, guess_type('t.xhtml')[0],
data=safe_xml_fromstring(tp))
else:
item = self.oeb.manifest.hrefs[
urldefrag(self.oeb.guide['titlepage'].href)[0]]
if item is not None:
self.oeb.spine.insert(0, item, True)
if 'cover' not in self.oeb.guide.refs:
self.oeb.guide.add('cover', 'Title page', 'a')
self.oeb.guide.refs['cover'].href = item.href
if 'titlepage' in self.oeb.guide.refs:
self.oeb.guide.refs['titlepage'].href = item.href
titem = getattr(self.oeb.toc, 'item_that_refers_to_cover', None)
if titem is not None:
titem.href = item.href
Zerion Mini Shell 1.0