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MOBI Output: When the input document does not explicitly specify a size for images, set the size to be the natural size of the image. This works around Amazon's *truly wonderful* MOBI renderer's tendency to expand images that do not have a width and height specified.

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This commit is contained in:
Kovid Goyal 2010-12-01 20:35:08 -07:00
parent b343837f65
commit 63ef5a5425
1 changed files with 38 additions and 3 deletions
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41
src/calibre/ebooks/mobi/mobiml.py
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@ -10,9 +10,10 @@ import copy
import re
from lxml import etree
from calibre.ebooks.oeb.base import namespace, barename
from calibre.ebooks.oeb.base import XHTML, XHTML_NS, OEB_DOCS
from calibre.ebooks.oeb.base import XHTML, XHTML_NS, OEB_DOCS, urlnormalize
from calibre.ebooks.oeb.stylizer import Stylizer
from calibre.ebooks.oeb.transforms.flatcss import KeyMapper
from calibre.utils.magick.draw import identify_data
MBP_NS = 'http://mobipocket.com/ns/mbp'
def MBP(name): return '{%s}%s' % (MBP_NS, name)
@ -121,6 +122,7 @@ class MobiMLizer(object):
body = item.data.find(XHTML('body'))
nroot = etree.Element(XHTML('html'), nsmap=MOBI_NSMAP)
nbody = etree.SubElement(nroot, XHTML('body'))
self.current_spine_item = item
self.mobimlize_elem(body, stylizer, BlockState(nbody),
[FormatState()])
item.data = nroot
@ -357,8 +359,9 @@ class MobiMLizer(object):
if tag == 'img' and 'src' in elem.attrib:
istate.attrib['src'] = elem.attrib['src']
istate.attrib['align'] = 'baseline'
cssdict = style.cssdict()
for prop in ('width', 'height'):
if style[prop] != 'auto':
if cssdict[prop] != 'auto':
value = style[prop]
if value == getattr(self.profile, prop):
result = '100%'
@ -371,8 +374,40 @@ class MobiMLizer(object):
(72./self.profile.dpi)))
except:
continue
result = "%d"%pixs
result = str(pixs)
istate.attrib[prop] = result
if 'width' not in istate.attrib or 'height' not in istate.attrib:
href = self.current_spine_item.abshref(elem.attrib['src'])
try:
item = self.oeb.manifest.hrefs[urlnormalize(href)]
except:
self.oeb.logger.warn('Failed to find image:',
href)
else:
try:
width, height = identify_data(item.data)[:2]
except:
self.oeb.logger.warn('Invalid image:', href)
else:
if 'width' not in istate.attrib and 'height' not in \
istate.attrib:
istate.attrib['width'] = str(width)
istate.attrib['height'] = str(height)
else:
ar = float(width)/float(height)
if 'width' not in istate.attrib:
try:
width = int(istate.attrib['height'])*ar
except:
pass
istate.attrib['width'] = str(int(width))
else:
try:
height = int(istate.attrib['width'])/ar
except:
pass
istate.attrib['height'] = str(int(height))
item.unload_data_from_memory()
elif tag == 'hr' and asfloat(style['width']) > 0:
prop = style['width'] / self.profile.width
istate.attrib['width'] = "%d%%" % int(round(prop * 100))