Current File : //lib/calibre/calibre/ebooks/lrf/__init__.py
__license__ = 'GPL v3'
__copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
"""
This package contains logic to read and write LRF files.
The LRF file format is documented at U{http://www.sven.de/librie/Librie/LrfFormat}.
"""
from calibre.ebooks.lrf.pylrs.pylrs import Book as _Book
from calibre.ebooks.lrf.pylrs.pylrs import TextBlock, Header, \
TextStyle, BlockStyle
from calibre.ebooks.lrf.fonts import FONT_FILE_MAP
from calibre.ebooks import ConversionError
__docformat__ = "epytext"
class LRFParseError(Exception):
pass
class PRS500_PROFILE:
screen_width = 600
screen_height = 775
dpi = 166
# Number of pixels to subtract from screen_height when calculating height of text area
fudge = 0
font_size = 10 #: Default (in pt)
parindent = 10 #: Default (in pt)
line_space = 1.2 # : Default (in pt)
header_font_size = 6 #: In pt
header_height = 30 # : In px
default_fonts = {'sans': "Swis721 BT Roman", 'mono': "Courier10 BT Roman",
'serif': "Dutch801 Rm BT Roman"}
name = 'prs500'
def find_custom_fonts(options, logger):
from calibre.utils.fonts.scanner import font_scanner
fonts = {'serif' : None, 'sans' : None, 'mono' : None}
def family(cmd):
return cmd.split(',')[-1].strip()
if options.serif_family:
f = family(options.serif_family)
fonts['serif'] = font_scanner.legacy_fonts_for_family(f)
if not fonts['serif']:
logger.warn('Unable to find serif family %s'%f)
if options.sans_family:
f = family(options.sans_family)
fonts['sans'] = font_scanner.legacy_fonts_for_family(f)
if not fonts['sans']:
logger.warn('Unable to find sans family %s'%f)
if options.mono_family:
f = family(options.mono_family)
fonts['mono'] = font_scanner.legacy_fonts_for_family(f)
if not fonts['mono']:
logger.warn('Unable to find mono family %s'%f)
return fonts
def Book(options, logger, font_delta=0, header=None,
profile=PRS500_PROFILE, **settings):
from uuid import uuid4
ps = {}
ps['topmargin'] = options.top_margin
ps['evensidemargin'] = options.left_margin
ps['oddsidemargin'] = options.left_margin
ps['textwidth'] = profile.screen_width - (options.left_margin + options.right_margin)
ps['textheight'] = profile.screen_height - (options.top_margin + options.bottom_margin) \
- profile.fudge
if header:
hdr = Header()
hb = TextBlock(textStyle=TextStyle(align='foot',
fontsize=int(profile.header_font_size*10)),
blockStyle=BlockStyle(blockwidth=ps['textwidth']))
hb.append(header)
hdr.PutObj(hb)
ps['headheight'] = profile.header_height
ps['headsep'] = options.header_separation
ps['header'] = hdr
ps['topmargin'] = 0
ps['textheight'] = profile.screen_height - (options.bottom_margin + ps['topmargin']) \
- ps['headheight'] - ps['headsep'] - profile.fudge
fontsize = int(10*profile.font_size+font_delta*20)
baselineskip = fontsize + 20
fonts = find_custom_fonts(options, logger)
tsd = dict(fontsize=fontsize,
parindent=int(10*profile.parindent),
linespace=int(10*profile.line_space),
baselineskip=baselineskip,
wordspace=10*options.wordspace)
if fonts['serif'] and 'normal' in fonts['serif']:
tsd['fontfacename'] = fonts['serif']['normal'][1]
book = _Book(textstyledefault=tsd,
pagestyledefault=ps,
blockstyledefault=dict(blockwidth=ps['textwidth']),
bookid=uuid4().hex,
**settings)
for family in fonts.keys():
if fonts[family]:
for font in fonts[family].values():
book.embed_font(*font)
FONT_FILE_MAP[font[1]] = font[0]
for family in ['serif', 'sans', 'mono']:
if not fonts[family]:
fonts[family] = {'normal' : (None, profile.default_fonts[family])}
elif 'normal' not in fonts[family]:
raise ConversionError('Could not find the normal version of the ' + family + ' font')
return book, fonts
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