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https://github.com/gryf/ebook-converter.git
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gryf
1465e4267f
Every mime related function in main __init__.py has a flag check for the check if initialization has already done. This is nonsense, since it should be done implicitly early on the converter is starting. This commit straight the things out, and initialization is done in cli module. Also, function guess_type was removed, since it's just a proxy for mimetypes.guess_type function.
133 lines
5.0 KiB
Python
133 lines
5.0 KiB
Python
import mimetypes
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import textwrap
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import urllib.parse
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from lxml import etree
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from ebook_converter.utils.imghdr import identify
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from ebook_converter.polyglot.urllib import unquote
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class CoverManager(object):
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SVG_TEMPLATE = textwrap.dedent('''\
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta name="calibre:cover" content="true" />
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<title>Cover</title>
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<style type="text/css" title="override_css">
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@page {padding: 0pt; margin:0pt}
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body { text-align: center; padding:0pt; margin: 0pt; }
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</style>
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</head>
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<body>
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<div>
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<svg version="1.1" xmlns="http://www.w3.org/2000/svg"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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width="100%%" height="100%%" viewBox="__viewbox__"
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preserveAspectRatio="__ar__">
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<image width="__width__" height="__height__" xlink:href="%s"/>
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</svg>
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</div>
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</body>
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</html>''')
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NONSVG_TEMPLATE = textwrap.dedent('''\
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta name="calibre:cover" content="true" />
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<title>Cover</title>
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<style type="text/css" title="override_css">
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@page {padding: 0pt; margin:0pt}
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body { text-align: center; padding:0pt; margin: 0pt }
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div { padding:0pt; margin: 0pt }
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img { padding:0pt; margin: 0pt }
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</style>
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</head>
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<body>
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<div>
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<img src="%s" alt="cover" __style__ />
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</div>
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</body>
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</html>
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''')
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def __init__(self, no_default_cover=False, no_svg_cover=False,
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preserve_aspect_ratio=False, fixed_size=None):
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self.no_default_cover = no_default_cover
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self.no_svg_cover = no_svg_cover
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self.preserve_aspect_ratio = preserve_aspect_ratio
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ar = 'xMidYMid meet' if preserve_aspect_ratio else 'none'
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self.svg_template = self.SVG_TEMPLATE.replace('__ar__', ar)
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if fixed_size is None:
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style = 'style="height: 100%%"'
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else:
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width, height = fixed_size
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style = 'style="height: %s; width: %s"' % (height, width)
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self.non_svg_template = self.NONSVG_TEMPLATE.replace('__style__',
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style)
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def __call__(self, oeb, opts, log):
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self.oeb = oeb
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self.log = log
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self.insert_cover()
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def inspect_cover(self, href):
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from ebook_converter.ebooks.oeb.base import urlnormalize
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for x in self.oeb.manifest:
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if x.href == urlnormalize(href):
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try:
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raw = x.data
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return identify(raw)[1:]
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except Exception:
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self.log.exception('Failed to read cover image dimensions')
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return -1, -1
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def insert_cover(self):
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g, m = self.oeb.guide, self.oeb.manifest
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item = None
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href = None
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if 'titlepage' not in g:
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if 'cover' in g:
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href = g['cover'].href
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if href is None:
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return
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width, height = self.inspect_cover(href)
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if width == -1 or height == -1:
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self.log.warning('Failed to read cover dimensions')
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width, height = 600, 800
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# if self.preserve_aspect_ratio:
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# width, height = 600, 800
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self.svg_template = self.svg_template.replace('__viewbox__',
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'0 0 %d %d' %
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(width, height))
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self.svg_template = self.svg_template.replace('__width__',
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str(width))
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self.svg_template = self.svg_template.replace('__height__',
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str(height))
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if href is not None:
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templ = self.non_svg_template if self.no_svg_cover \
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else self.svg_template
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tp = templ % unquote(href)
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id, href = m.generate('titlepage', 'titlepage.xhtml')
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item = m.add(id, href, mimetypes.guess_type('t.xhtml')[0],
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data=etree.fromstring(tp))
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else:
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key = urllib.parse.urldefrag(self.oeb.guide['titlepage'].href)[0]
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item = self.oeb.manifest.hrefs[key]
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if item is not None:
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self.oeb.spine.insert(0, item, True)
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if 'cover' not in self.oeb.guide.refs:
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self.oeb.guide.add('cover', 'Title Page', 'a')
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self.oeb.guide.refs['cover'].href = item.href
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if 'titlepage' in self.oeb.guide.refs:
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self.oeb.guide.refs['titlepage'].href = item.href
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titem = getattr(self.oeb.toc, 'item_that_refers_to_cover', None)
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if titem is not None:
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titem.href = item.href
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