def convert(self, oeb_book, output_path, input_plugin, opts, log):
from lxml import etree
from calibre.ebooks.snb.snbfile import SNBFile
from calibre.ebooks.snb.snbml import SNBMLizer, ProcessFileName
self.opts = opts
from calibre.ebooks.oeb.transforms.rasterize import SVGRasterizer, Unavailable
try:
rasterizer = SVGRasterizer()
rasterizer(oeb_book, opts)
except Unavailable:
log.warn('SVG rasterizer unavailable, SVG will not be converted')
# Create temp dir
with TemporaryDirectory('_snb_output') as tdir:
# Create stub directories
snbfDir = os.path.join(tdir, 'snbf')
snbcDir = os.path.join(tdir, 'snbc')
snbiDir = os.path.join(tdir, 'snbc/images')
os.mkdir(snbfDir)
os.mkdir(snbcDir)
os.mkdir(snbiDir)
# Process Meta data
meta = oeb_book.metadata
if meta.title:
title = str(meta.title[0])
else:
title = ''
authors = [str(x) for x in meta.creator if x.role == 'aut']
if meta.publisher:
publishers = str(meta.publisher[0])
else:
publishers = ''
if meta.language:
lang = str(meta.language[0]).upper()
else:
lang = ''
if meta.description:
abstract = str(meta.description[0])
else:
abstract = ''
# Process Cover
g, m, s = oeb_book.guide, oeb_book.manifest, oeb_book.spine
href = None
if 'titlepage' not in g:
if 'cover' in g:
href = g['cover'].href
# Output book info file
bookInfoTree = etree.Element("book-snbf", version="1.0")
headTree = etree.SubElement(bookInfoTree, "head")
etree.SubElement(headTree, "name").text = title
etree.SubElement(headTree, "author").text = ' '.join(authors)
etree.SubElement(headTree, "language").text = lang
etree.SubElement(headTree, "rights")
etree.SubElement(headTree, "publisher").text = publishers
etree.SubElement(
headTree, "generator").text = __appname__ + ' ' + __version__
etree.SubElement(headTree, "created")
etree.SubElement(headTree, "abstract").text = abstract
if href is not None:
etree.SubElement(headTree,
"cover").text = ProcessFileName(href)
else:
etree.SubElement(headTree, "cover")
with open(os.path.join(snbfDir, 'book.snbf'), 'wb') as f:
f.write(
etree.tostring(bookInfoTree,
pretty_print=True,
encoding='utf-8'))
# Output TOC
tocInfoTree = etree.Element("toc-snbf")
tocHead = etree.SubElement(tocInfoTree, "head")
tocBody = etree.SubElement(tocInfoTree, "body")
outputFiles = {}
if oeb_book.toc.count() == 0:
log.warn('This SNB file has no Table of Contents. '
'Creating a default TOC')
first = next(iter(oeb_book.spine))
oeb_book.toc.add(_('Start page'), first.href)
else:
first = next(iter(oeb_book.spine))
if oeb_book.toc[0].href != first.href:
# The pages before the fist item in toc will be stored as
# "Cover Pages".
# oeb_book.toc does not support "insert", so we generate
# the tocInfoTree directly instead of modifying the toc
ch = etree.SubElement(tocBody, "chapter")
ch.set("src", ProcessFileName(first.href) + ".snbc")
ch.text = _('Cover pages')
outputFiles[first.href] = []
outputFiles[first.href].append(("", _("Cover pages")))
for tocitem in oeb_book.toc:
if tocitem.href.find('#') != -1:
item = tocitem.href.split('#')
if len(item) != 2:
log.error('Error in TOC item: %s' % tocitem)
else:
if item[0] in outputFiles:
outputFiles[item[0]].append(
(item[1], tocitem.title))
else:
outputFiles[item[0]] = []
if "" not in outputFiles[item[0]]:
outputFiles[item[0]].append(
("", tocitem.title + _(" (Preface)")))
ch = etree.SubElement(tocBody, "chapter")
ch.set("src",
ProcessFileName(item[0]) + ".snbc")
ch.text = tocitem.title + _(" (Preface)")
outputFiles[item[0]].append(
(item[1], tocitem.title))
else:
if tocitem.href in outputFiles:
outputFiles[tocitem.href].append(("", tocitem.title))
else:
outputFiles[tocitem.href] = []
outputFiles[tocitem.href].append(("", tocitem.title))
ch = etree.SubElement(tocBody, "chapter")
ch.set("src", ProcessFileName(tocitem.href) + ".snbc")
ch.text = tocitem.title
etree.SubElement(tocHead, "chapters").text = '%d' % len(tocBody)
with open(os.path.join(snbfDir, 'toc.snbf'), 'wb') as f:
f.write(
etree.tostring(tocInfoTree,
pretty_print=True,
encoding='utf-8'))
# Output Files
oldTree = None
mergeLast = False
lastName = None
for item in s:
from calibre.ebooks.oeb.base import OEB_DOCS, OEB_IMAGES
if m.hrefs[item.href].media_type in OEB_DOCS:
if item.href not in outputFiles:
log.debug(
'File %s is unused in TOC. Continue in last chapter'
% item.href)
mergeLast = True
else:
if oldTree is not None and mergeLast:
log.debug('Output the modified chapter again: %s' %
lastName)
with open(os.path.join(snbcDir, lastName),
'wb') as f:
f.write(
etree.tostring(oldTree,
pretty_print=True,
encoding='utf-8'))
mergeLast = False
log.debug('Converting %s to snbc...' % item.href)
snbwriter = SNBMLizer(log)
snbcTrees = None
if not mergeLast:
snbcTrees = snbwriter.extract_content(
oeb_book, item, outputFiles[item.href], opts)
for subName in snbcTrees:
postfix = ''
if subName != '':
postfix = '_' + subName
lastName = ProcessFileName(item.href + postfix +
".snbc")
oldTree = snbcTrees[subName]
with open(os.path.join(snbcDir, lastName),
'wb') as f:
f.write(
etree.tostring(oldTree,
pretty_print=True,
encoding='utf-8'))
else:
log.debug('Merge %s with last TOC item...' % item.href)
snbwriter.merge_content(oldTree, oeb_book, item,
[('', _("Start"))], opts)
# Output the last one if needed
log.debug('Output the last modified chapter again: %s' % lastName)
if oldTree is not None and mergeLast:
with open(os.path.join(snbcDir, lastName), 'wb') as f:
f.write(
etree.tostring(oldTree,
pretty_print=True,
encoding='utf-8'))
mergeLast = False
for item in m:
if m.hrefs[item.href].media_type in OEB_IMAGES:
log.debug('Converting image: %s ...' % item.href)
content = m.hrefs[item.href].data
# Convert & Resize image
self.HandleImage(
content,
os.path.join(snbiDir, ProcessFileName(item.href)))
# Package as SNB File
snbFile = SNBFile()
snbFile.FromDir(tdir)
snbFile.Output(output_path)
def convert(self, oeb_book, output_path, input_plugin, opts, log):
from lxml import etree
from calibre.ebooks.snb.snbfile import SNBFile
from calibre.ebooks.snb.snbml import SNBMLizer, ProcessFileName
self.opts = opts
from calibre.ebooks.oeb.transforms.rasterize import SVGRasterizer, Unavailable
try:
rasterizer = SVGRasterizer()
rasterizer(oeb_book, opts)
except Unavailable:
log.warn('SVG rasterizer unavailable, SVG will not be converted')
# Create temp dir
with TemporaryDirectory('_snb_output') as tdir:
# Create stub directories
snbfDir = os.path.join(tdir, 'snbf')
snbcDir = os.path.join(tdir, 'snbc')
snbiDir = os.path.join(tdir, 'snbc/images')
os.mkdir(snbfDir)
os.mkdir(snbcDir)
os.mkdir(snbiDir)
# Process Meta data
meta = oeb_book.metadata
if meta.title:
title = unicode(meta.title[0])
else:
title = ''
authors = [unicode(x) for x in meta.creator if x.role == 'aut']
if meta.publisher:
publishers = unicode(meta.publisher[0])
else:
publishers = ''
if meta.language:
lang = unicode(meta.language[0]).upper()
else:
lang = ''
if meta.description:
abstract = unicode(meta.description[0])
else:
abstract = ''
# Process Cover
g, m, s = oeb_book.guide, oeb_book.manifest, oeb_book.spine
href = None
if 'titlepage' not in g:
if 'cover' in g:
href = g['cover'].href
# Output book info file
bookInfoTree = etree.Element("book-snbf", version="1.0")
headTree = etree.SubElement(bookInfoTree, "head")
etree.SubElement(headTree, "name").text = title
etree.SubElement(headTree, "author").text = ' '.join(authors)
etree.SubElement(headTree, "language").text = lang
etree.SubElement(headTree, "rights")
etree.SubElement(headTree, "publisher").text = publishers
etree.SubElement(headTree, "generator").text = __appname__ + ' ' + __version__
etree.SubElement(headTree, "created")
etree.SubElement(headTree, "abstract").text = abstract
if href is not None:
etree.SubElement(headTree, "cover").text = ProcessFileName(href)
else:
etree.SubElement(headTree, "cover")
bookInfoFile = open(os.path.join(snbfDir, 'book.snbf'), 'wb')
bookInfoFile.write(etree.tostring(bookInfoTree, pretty_print=True, encoding='utf-8'))
bookInfoFile.close()
# Output TOC
tocInfoTree = etree.Element("toc-snbf")
tocHead = etree.SubElement(tocInfoTree, "head")
tocBody = etree.SubElement(tocInfoTree, "body")
outputFiles = {}
if oeb_book.toc.count() == 0:
log.warn('This SNB file has no Table of Contents. '
'Creating a default TOC')
first = iter(oeb_book.spine).next()
oeb_book.toc.add(_('Start page'), first.href)
else:
first = iter(oeb_book.spine).next()
if oeb_book.toc[0].href != first.href:
# The pages before the fist item in toc will be stored as
# "Cover Pages".
# oeb_book.toc does not support "insert", so we generate
# the tocInfoTree directly instead of modifying the toc
ch = etree.SubElement(tocBody, "chapter")
ch.set("src", ProcessFileName(first.href) + ".snbc")
ch.text = _('Cover pages')
outputFiles[first.href] = []
outputFiles[first.href].append(("", _("Cover pages")))
for tocitem in oeb_book.toc:
if tocitem.href.find('#') != -1:
item = string.split(tocitem.href, '#')
if len(item) != 2:
log.error('Error in TOC item: %s' % tocitem)
else:
if item[0] in outputFiles:
outputFiles[item[0]].append((item[1], tocitem.title))
else:
outputFiles[item[0]] = []
if "" not in outputFiles[item[0]]:
outputFiles[item[0]].append(("", tocitem.title + _(" (Preface)")))
ch = etree.SubElement(tocBody, "chapter")
ch.set("src", ProcessFileName(item[0]) + ".snbc")
ch.text = tocitem.title + _(" (Preface)")
outputFiles[item[0]].append((item[1], tocitem.title))
else:
if tocitem.href in outputFiles:
outputFiles[tocitem.href].append(("", tocitem.title))
else:
outputFiles[tocitem.href] = []
outputFiles[tocitem.href].append(("", tocitem.title))
ch = etree.SubElement(tocBody, "chapter")
ch.set("src", ProcessFileName(tocitem.href) + ".snbc")
ch.text = tocitem.title
etree.SubElement(tocHead, "chapters").text = '%d' % len(tocBody)
tocInfoFile = open(os.path.join(snbfDir, 'toc.snbf'), 'wb')
tocInfoFile.write(etree.tostring(tocInfoTree, pretty_print=True, encoding='utf-8'))
tocInfoFile.close()
# Output Files
oldTree = None
mergeLast = False
lastName = None
for item in s:
from calibre.ebooks.oeb.base import OEB_DOCS, OEB_IMAGES
if m.hrefs[item.href].media_type in OEB_DOCS:
if item.href not in outputFiles:
log.debug('File %s is unused in TOC. Continue in last chapter' % item.href)
mergeLast = True
else:
if oldTree is not None and mergeLast:
log.debug('Output the modified chapter again: %s' % lastName)
outputFile = open(os.path.join(snbcDir, lastName), 'wb')
outputFile.write(etree.tostring(oldTree, pretty_print=True, encoding='utf-8'))
outputFile.close()
mergeLast = False
log.debug('Converting %s to snbc...' % item.href)
snbwriter = SNBMLizer(log)
snbcTrees = None
if not mergeLast:
snbcTrees = snbwriter.extract_content(oeb_book, item, outputFiles[item.href], opts)
for subName in snbcTrees:
postfix = ''
if subName != '':
postfix = '_' + subName
lastName = ProcessFileName(item.href + postfix + ".snbc")
oldTree = snbcTrees[subName]
outputFile = open(os.path.join(snbcDir, lastName), 'wb')
outputFile.write(etree.tostring(oldTree, pretty_print=True, encoding='utf-8'))
outputFile.close()
else:
log.debug('Merge %s with last TOC item...' % item.href)
snbwriter.merge_content(oldTree, oeb_book, item, [('', _("Start"))], opts)
# Output the last one if needed
log.debug('Output the last modified chapter again: %s' % lastName)
if oldTree is not None and mergeLast:
outputFile = open(os.path.join(snbcDir, lastName), 'wb')
outputFile.write(etree.tostring(oldTree, pretty_print=True, encoding='utf-8'))
outputFile.close()
mergeLast = False
for item in m:
if m.hrefs[item.href].media_type in OEB_IMAGES:
log.debug('Converting image: %s ...' % item.href)
content = m.hrefs[item.href].data
# Convert & Resize image
self.HandleImage(content, os.path.join(snbiDir, ProcessFileName(item.href)))
# Package as SNB File
snbFile = SNBFile()
snbFile.FromDir(tdir)
snbFile.Output(output_path)