mirror of
https://github.com/kovidgoyal/calibre.git
synced 2025-07-09 03:04:10 -04:00
Basic plucker working (text, non-composite images).
This commit is contained in:
John Schember
parent
0f62ea111c
commit
0f3228e658
@ -10,9 +10,13 @@ import os
|
||||
import struct
|
||||
import zlib
|
||||
|
||||
from collections import OrderedDict
|
||||
|
||||
from calibre import CurrentDir
|
||||
from calibre.ebooks.metadata.opf2 import OPFCreator
|
||||
from calibre.ebooks.pdb.formatreader import FormatReader
|
||||
from calibre.ptempfile import TemporaryFile
|
||||
from calibre.utils.magick import Image
|
||||
|
||||
DATATYPE_PHTML = 0
|
||||
DATATYPE_PHTML_COMPRESSED = 1
|
||||
@ -38,6 +42,100 @@ DATATYPE_EXT_ANCHOR_INDEX = 20
|
||||
DATATYPE_EXT_ANCHOR = 21
|
||||
DATATYPE_EXT_ANCHOR_COMPRESSED = 22
|
||||
|
||||
# IETF IANA MIBenum value for the character set.
|
||||
# See the http://www.iana.org/assignments/character-sets for valid values.
|
||||
# Not all character sets are handled by Python. This is a small subset that
|
||||
# the MIBenum maps to Python standard encodings
|
||||
# from http://docs.python.org/library/codecs.html#standard-encodings
|
||||
MIBNUM_TO_NAME = {
|
||||
3: 'ascii',
|
||||
4: 'latin_1',
|
||||
5: 'iso8859_2',
|
||||
6: 'iso8859_3',
|
||||
7: 'iso8859_4',
|
||||
8: 'iso8859_5',
|
||||
9: 'iso8859_6',
|
||||
10: 'iso8859_7',
|
||||
11: 'iso8859_8',
|
||||
12: 'iso8859_9',
|
||||
13: 'iso8859_10',
|
||||
17: 'shift_jis',
|
||||
18: 'euc_jp',
|
||||
27: 'utf_7',
|
||||
36: 'euc_kr',
|
||||
37: 'iso2022_kr',
|
||||
38: 'euc_kr',
|
||||
39: 'iso2022_jp',
|
||||
40: 'iso2022_jp_2',
|
||||
106: 'utf-8',
|
||||
109: 'iso8859_13',
|
||||
110: 'iso8859_14',
|
||||
111: 'iso8859_15',
|
||||
112: 'iso8859_16',
|
||||
1013: 'utf_16_be',
|
||||
1014: 'utf_16_le',
|
||||
1015: 'utf_16',
|
||||
2009: 'cp850',
|
||||
2010: 'cp852',
|
||||
2011: 'cp437',
|
||||
2013: 'cp862',
|
||||
2025: 'gb2312',
|
||||
2026: 'big5',
|
||||
2028: 'cp037',
|
||||
2043: 'cp424',
|
||||
2044: 'cp500',
|
||||
2046: 'cp855',
|
||||
2047: 'cp857',
|
||||
2048: 'cp860',
|
||||
2049: 'cp861',
|
||||
2050: 'cp863',
|
||||
2051: 'cp864',
|
||||
2052: 'cp865',
|
||||
2054: 'cp869',
|
||||
2063: 'cp1026',
|
||||
2085: 'hz',
|
||||
2086: 'cp866',
|
||||
2087: 'cp775',
|
||||
2089: 'cp858',
|
||||
2091: 'cp1140',
|
||||
2102: 'big5hkscs',
|
||||
2250: 'cp1250',
|
||||
2251: 'cp1251',
|
||||
2252: 'cp1252',
|
||||
2253: 'cp1253',
|
||||
2254: 'cp1254',
|
||||
2255: 'cp1255',
|
||||
2256: 'cp1256',
|
||||
2257: 'cp1257',
|
||||
2258: 'cp1258',
|
||||
}
|
||||
|
||||
def decompress_doc(data):
|
||||
buffer = [ord(i) for i in data]
|
||||
res = []
|
||||
i = 0
|
||||
while i < len(buffer):
|
||||
c = buffer[i]
|
||||
i += 1
|
||||
if c >= 1 and c <= 8:
|
||||
res.extend(buffer[i:i+c])
|
||||
i += c
|
||||
elif c <= 0x7f:
|
||||
res.append(c)
|
||||
elif c >= 0xc0:
|
||||
res.extend( (ord(' '), c^0x80) )
|
||||
else:
|
||||
c = (c << 8) + buffer[i]
|
||||
i += 1
|
||||
di = (c & 0x3fff) >> 3
|
||||
j = len(res)
|
||||
num = (c & ((1 << 3) - 1)) + 3
|
||||
|
||||
for k in range( num ):
|
||||
res.append(res[j - di+k])
|
||||
|
||||
return ''.join([chr(i) for i in res])
|
||||
|
||||
class HeaderRecord(object):
|
||||
|
||||
def __init__(self, raw):
|
||||
@ -68,14 +166,62 @@ class SectionHeader(object):
|
||||
|
||||
class SectionHeaderText(object):
|
||||
|
||||
def __init__(self, data_header, raw):
|
||||
def __init__(self, section_header, raw):
|
||||
self.sizes = []
|
||||
self.attributes = []
|
||||
|
||||
for i in xrange(data_header.paragraphs):
|
||||
for i in xrange(section_header.paragraphs):
|
||||
adv = 4*i
|
||||
self.sizes.append(struct.unpack('>H', raw[8+adv:10+adv])[0])
|
||||
self.attributes.append(struct.unpack('>H', raw[10+adv:12+adv])[0])
|
||||
self.sizes.append(struct.unpack('>H', raw[adv:2+adv])[0])
|
||||
self.attributes.append(struct.unpack('>H', raw[2+adv:4+adv])[0])
|
||||
|
||||
class SectionMetadata(object):
|
||||
|
||||
def __init__(self, raw):
|
||||
self.default_encoding = 'utf-8'
|
||||
self.exceptional_uid_encodings = {}
|
||||
self.owner_id = None
|
||||
|
||||
record_count, = struct.unpack('>H', raw[0:2])
|
||||
|
||||
adv = 0
|
||||
for i in xrange(record_count):
|
||||
type, = struct.unpack('>H', raw[2+adv:4+adv])
|
||||
length, = struct.unpack('>H', raw[4+adv:6+adv])
|
||||
|
||||
# CharSet
|
||||
if type == 1:
|
||||
val, = struct.unpack('>H', raw[6+adv:8+adv])
|
||||
self.default_encoding = MIBNUM_TO_NAME.get(val, 'utf-8')
|
||||
# ExceptionalCharSets
|
||||
elif type == 2:
|
||||
ii_adv = 0
|
||||
for ii in xrange(length / 2):
|
||||
uid, = struct.unpack('>H', raw[6+adv+ii_adv:8+adv+ii_adv])
|
||||
mib, = struct.unpack('>H', raw[8+adv+ii_adv:10+adv+ii_adv])
|
||||
self.exceptional_uid_encodings[uid] = MIBNUM_TO_NAME.get(mib, 'utf-8')
|
||||
ii_adv += 4
|
||||
# OwnerID
|
||||
elif type == 3:
|
||||
self.owner_id = struct.unpack('>I', raw[6+adv:10+adv])
|
||||
# Author, Title, PubDate
|
||||
# Ignored here. The metadata reader plugin
|
||||
# will get this info because if it's missing
|
||||
# the metadata reader plugin will use fall
|
||||
# back data from elsewhere in the file.
|
||||
elif type in (4, 5, 6):
|
||||
pass
|
||||
# Linked Documents
|
||||
elif type == 7:
|
||||
pass
|
||||
|
||||
adv += 2*length
|
||||
|
||||
class SectionText(object):
|
||||
|
||||
def __init__(self, section_header, raw):
|
||||
self.header = SectionHeaderText(section_header, raw)
|
||||
self.data = raw[section_header.paragraphs * 4:]
|
||||
|
||||
|
||||
class Reader(FormatReader):
|
||||
@ -85,52 +231,301 @@ class Reader(FormatReader):
|
||||
self.log = log
|
||||
self.options = options
|
||||
|
||||
# Mapping of section uid to our internal
|
||||
# list of sections.
|
||||
self.uid_section_number = OrderedDict()
|
||||
self.uid_text_secion_number = OrderedDict()
|
||||
self.uid_text_secion_encoding = {}
|
||||
self.uid_image_section_number = {}
|
||||
self.metadata_section_number = None
|
||||
self.default_encoding = 'utf-8'
|
||||
self.owner_id = None
|
||||
self.sections = []
|
||||
for i in range(1, header.num_sections):
|
||||
start = 8
|
||||
raw_data = header.section_data(i)
|
||||
data_header = SectionHeader(raw_data)
|
||||
sub_header = None
|
||||
if data_header.type in (DATATYPE_PHTML, DATATYPE_PHTML_COMPRESSED):
|
||||
sub_header = SectionHeaderText(data_header, raw_data)
|
||||
start += data_header.paragraphs * 4
|
||||
self.sections.append((data_header, sub_header, raw_data[start:]))
|
||||
|
||||
self.header_record = HeaderRecord(header.section_data(0))
|
||||
|
||||
for i in range(1, header.num_sections):
|
||||
section_number = i - 1
|
||||
start = 8
|
||||
section = None
|
||||
|
||||
raw_data = header.section_data(i)
|
||||
section_header = SectionHeader(raw_data)
|
||||
|
||||
self.uid_section_number[section_header.uid] = section_number
|
||||
|
||||
if section_header.type in (DATATYPE_PHTML, DATATYPE_PHTML_COMPRESSED):
|
||||
self.uid_text_secion_number[section_header.uid] = section_number
|
||||
section = SectionText(section_header, raw_data[start:])
|
||||
elif section_header.type in (DATATYPE_TBMP, DATATYPE_TBMP_COMPRESSED):
|
||||
self.uid_image_section_number[section_header.uid] = section_number
|
||||
section = raw_data[start:]
|
||||
elif section_header.type == DATATYPE_METADATA:
|
||||
self.metadata_section_number = section_number
|
||||
section = SectionMetadata(raw_data[start:])
|
||||
elif section_header.type == DATATYPE_COMPOSITE_IMAGE:
|
||||
|
||||
|
||||
self.sections.append((section_header, section))
|
||||
|
||||
if self.metadata_section_number:
|
||||
mdata_section = self.sections[self.metadata_section_number][1]
|
||||
for k, v in mdata_section.exceptional_uid_encodings.items():
|
||||
self.uid_text_secion_encoding[k] = v
|
||||
self.default_encoding = mdata_section.default_encoding
|
||||
self.owner_id = mdata_section.owner_id
|
||||
|
||||
from calibre.ebooks.metadata.pdb import get_metadata
|
||||
self.mi = get_metadata(stream, False)
|
||||
|
||||
def extract_content(self, output_dir):
|
||||
html = u''
|
||||
html = u'<html><body>'
|
||||
images = []
|
||||
|
||||
for header, sub_header, data in self.sections:
|
||||
if header.type == DATATYPE_PHTML:
|
||||
html += data
|
||||
elif header.type == DATATYPE_PHTML_COMPRESSED:
|
||||
d = self.decompress_phtml(data).decode('latin-1', 'replace')
|
||||
print len(d) == header.size
|
||||
html += d
|
||||
for uid, num in self.uid_text_secion_number.items():
|
||||
section_header, section_data = self.sections[num]
|
||||
if section_header.type == DATATYPE_PHTML:
|
||||
html += self.process_phtml(section_data.header, section_data.data.decode(self.get_text_uid_encoding(section_header.uid), 'replace'))
|
||||
elif section_header.type == DATATYPE_PHTML_COMPRESSED:
|
||||
d = self.decompress_phtml(section_data.data).decode(self.get_text_uid_encoding(section_header.uid), 'replace')
|
||||
html += self.process_phtml(section_data.header, d)
|
||||
|
||||
html += '</body></html>'
|
||||
|
||||
print html
|
||||
with CurrentDir(output_dir):
|
||||
with open('index.html', 'wb') as index:
|
||||
self.log.debug('Writing text to index.html')
|
||||
index.write(html.encode('utf-8'))
|
||||
|
||||
if not os.path.exists(os.path.join(output_dir, 'images/')):
|
||||
os.makedirs(os.path.join(output_dir, 'images/'))
|
||||
with CurrentDir(os.path.join(output_dir, 'images/')):
|
||||
#im.read('/Users/john/Tmp/plkr/apnx.palm')
|
||||
for uid, num in self.uid_image_section_number.items():
|
||||
section_header, section_data = self.sections[num]
|
||||
if section_data:
|
||||
idata = None
|
||||
if section_header.type == DATATYPE_TBMP:
|
||||
idata = section_data
|
||||
elif section_header.type == DATATYPE_TBMP_COMPRESSED:
|
||||
if self.header_record.compression == 1:
|
||||
idata = decompress_doc(section_data)
|
||||
elif self.header_record.compression == 2:
|
||||
idata = zlib.decompress(section_data)
|
||||
try:
|
||||
with TemporaryFile(suffix='.palm') as itn:
|
||||
with open(itn, 'wb') as itf:
|
||||
itf.write(idata)
|
||||
im = Image()
|
||||
im.read(itn)
|
||||
im.set_compression_quality(70)
|
||||
im.save('%s.jpg' % uid)
|
||||
self.log.debug('Wrote image with uid %s to images/%s.jpg' % (uid, uid))
|
||||
except Exception as e:
|
||||
self.log.error('Failed to write image with uid %s: %s' % (uid, e))
|
||||
images.append('%s.jpg' % uid)
|
||||
else:
|
||||
self.log.error('Failed to write image with uid %s: No data.' % uid)
|
||||
|
||||
opf_path = self.create_opf(output_dir, images)
|
||||
|
||||
return opf_path
|
||||
|
||||
def decompress_phtml(self, data):
|
||||
if self.header_record.compression == 2:
|
||||
raise NotImplementedError
|
||||
#return zlib.decompress(data)
|
||||
if self.owner_id:
|
||||
raise NotImplementedError
|
||||
return zlib.decompress(data)
|
||||
elif self.header_record.compression == 1:
|
||||
from calibre.ebooks.compression.palmdoc import decompress_doc
|
||||
#from calibre.ebooks.compression.palmdoc import decompress_doc
|
||||
return decompress_doc(data)
|
||||
|
||||
def process_phtml(self, sub_header, d):
|
||||
html = u''
|
||||
offset = 0
|
||||
paragraph_open = False
|
||||
paragraph_offsets = []
|
||||
running_offset = 0
|
||||
for size in sub_header.sizes:
|
||||
running_offset += size
|
||||
paragraph_offsets.append(running_offset)
|
||||
|
||||
while offset < len(d):
|
||||
if not paragraph_open:
|
||||
html += u'<p>'
|
||||
paragraph_open = True
|
||||
|
||||
c = ord(d[offset])
|
||||
if c == 0x0:
|
||||
offset += 1
|
||||
c = ord(d[offset])
|
||||
# Page link begins
|
||||
# 2 Bytes
|
||||
# record ID
|
||||
if c == 0x0a:
|
||||
offset += 2
|
||||
# Targeted page link begins
|
||||
# 3 Bytes
|
||||
# record ID, target
|
||||
elif c == 0x0b:
|
||||
offset += 3
|
||||
# Paragraph link begins
|
||||
# 4 Bytes
|
||||
# record ID, paragraph number
|
||||
elif c == 0x0c:
|
||||
offset += 4
|
||||
# Targeted paragraph link begins
|
||||
# 5 Bytes
|
||||
# record ID, paragraph number, target
|
||||
elif c == 0x0d:
|
||||
offset += 5
|
||||
# Link ends
|
||||
# 0 Bytes
|
||||
elif c == 0x08:
|
||||
pass
|
||||
# Set font
|
||||
# 1 Bytes
|
||||
# font specifier
|
||||
elif c == 0x11:
|
||||
offset += 1
|
||||
# Embedded image
|
||||
# 2 Bytes
|
||||
# image record ID
|
||||
elif c == 0x1a:
|
||||
offset += 1
|
||||
uid = struct.unpack('>H', d[offset:offset+2])[0]
|
||||
html += '<img src="images/%s.jpg" />' % uid
|
||||
offset += 1
|
||||
# Set margin
|
||||
# 2 Bytes
|
||||
# left margin, right margin
|
||||
elif c == 0x22:
|
||||
offset += 2
|
||||
# Alignment of text
|
||||
# 1 Bytes
|
||||
# alignment
|
||||
elif c == 0x29:
|
||||
offset += 1
|
||||
# Horizontal rule
|
||||
# 3 Bytes
|
||||
# 8-bit height, 8-bit width (pixels), 8-bit width (%, 1-100)
|
||||
elif c == 0x33:
|
||||
offset += 3
|
||||
if paragraph_open:
|
||||
html += u'</p>'
|
||||
paragraph_open = False
|
||||
html += u'<hr />'
|
||||
# New line
|
||||
# 0 Bytes
|
||||
elif c == 0x38:
|
||||
if paragraph_open:
|
||||
html += u'</p>\n'
|
||||
paragraph_open = False
|
||||
# Italic text begins
|
||||
# 0 Bytes
|
||||
elif c == 0x40:
|
||||
html += u'<i>'
|
||||
# Italic text ends
|
||||
# 0 Bytes
|
||||
elif c == 0x48:
|
||||
html += u'</i>'
|
||||
# Set text color
|
||||
# 3 Bytes
|
||||
# 8-bit red, 8-bit green, 8-bit blue
|
||||
elif c == 0x53:
|
||||
offset += 3
|
||||
# Multiple embedded image
|
||||
# 4 Bytes
|
||||
# alternate image record ID, image record ID
|
||||
elif c == 0x5c:
|
||||
offset += 4
|
||||
# Underline text begins
|
||||
# 0 Bytes
|
||||
elif c == 0x60:
|
||||
html += u'<u>'
|
||||
# Underline text ends
|
||||
# 0 Bytes
|
||||
elif c == 0x68:
|
||||
html += u'</u>'
|
||||
# Strike-through text begins
|
||||
# 0 Bytes
|
||||
elif c == 0x70:
|
||||
html += u'<s>'
|
||||
# Strike-through text ends
|
||||
# 0 Bytes
|
||||
elif c == 0x78:
|
||||
html += u'</s>'
|
||||
# 16-bit Unicode character
|
||||
# 3 Bytes
|
||||
# alternate text length, 16-bit unicode character
|
||||
elif c == 0x83:
|
||||
#offset += 2
|
||||
#c16 = d[offset:offset+2]
|
||||
#html += c16.decode('utf-16')
|
||||
#offset += 1
|
||||
offset += 3
|
||||
# 32-bit Unicode character
|
||||
# 5 Bytes
|
||||
# alternate text length, 32-bit unicode character
|
||||
elif c == 0x85:
|
||||
#offset += 2
|
||||
#c32 = d[offset:offset+4]
|
||||
#html += c32.decode('utf-32')
|
||||
#offset += 3
|
||||
offset += 5
|
||||
# Begin custom font span
|
||||
# 6 Bytes
|
||||
# font page record ID, X page position, Y page position
|
||||
elif c == 0x8e:
|
||||
offset += 6
|
||||
# Adjust custom font glyph position
|
||||
# 4 Bytes
|
||||
# X page position, Y page position
|
||||
elif c == 0x8c:
|
||||
offset += 4
|
||||
# Change font page
|
||||
# 2 Bytes
|
||||
# font record ID
|
||||
elif c == 0x8a:
|
||||
offset += 2
|
||||
# End custom font span
|
||||
# 0 Bytes
|
||||
elif c == 0x88:
|
||||
pass
|
||||
# Begin new table row
|
||||
# 0 Bytes
|
||||
elif c == 0x90:
|
||||
pass
|
||||
# Insert table (or table link)
|
||||
# 2 Bytes
|
||||
# table record ID
|
||||
elif c == 0x92:
|
||||
offset += 2
|
||||
# Table cell data
|
||||
# 7 Bytes
|
||||
# 8-bit alignment, 16-bit image record ID, 8-bit columns, 8-bit rows, 16-bit text length
|
||||
elif c == 0x97:
|
||||
offset += 7
|
||||
# Exact link modifier
|
||||
# 2 Bytes
|
||||
# Paragraph Offset (The Exact Link Modifier modifies a Paragraph Link or Targeted Paragraph Link function to specify an exact byte offset within the paragraph. This function must be followed immediately by the function it modifies).
|
||||
elif c == 0x9a:
|
||||
offset += 2
|
||||
else:
|
||||
html += unichr(c)
|
||||
offset += 1
|
||||
if offset in paragraph_offsets:
|
||||
if paragraph_open:
|
||||
html += u'</p>\n'
|
||||
paragraph_open = False
|
||||
|
||||
if paragraph_open:
|
||||
html += u'</p>'
|
||||
|
||||
return html
|
||||
|
||||
def get_text_uid_encoding(self, uid):
|
||||
return self.uid_text_secion_encoding.get(uid, self.default_encoding)
|
||||
|
||||
def create_opf(self, output_dir, images):
|
||||
with CurrentDir(output_dir):
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user