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#!/usr/bin/env python3
import argparse
import os.path
import subprocess
try:
import pypdf
except ImportError:
pypdf = None
SIGNATURE = (
15, 0, 13, 2,
1, 14, 3, 12,
11, 4, 9, 6,
5, 10, 7, 8,
)
SIGNATURE_32 = (
15, 0, 31, 16,
1, 14, 17, 30,
13, 2, 29, 18,
3, 12, 19, 28,
11, 4, 27, 20,
5, 10, 21, 26,
9, 6, 25, 22,
7, 8, 23, 24,
)
SIGNATURE_64 = (
63, 0, 61, 2, 1, 62, 3, 60,
59, 4, 57, 6, 5, 58, 7, 56,
55, 8, 53, 10, 9, 54, 11, 52,
51, 12, 49, 14, 13, 50, 15, 48,
47, 16, 45, 18, 17, 46, 19, 44,
43, 20, 41, 22, 21, 42, 23, 40,
39, 24, 37, 26, 25, 38, 27, 36,
35, 28, 33, 30, 29, 34, 31, 32,
)
def get_parser():
parser = argparse.ArgumentParser()
parser.add_argument(
"--double", "-d",
action="store_true",
help="Put two signatures on 4 A4 sheet. Pages will be a "
"multiple of 32",
)
parser.add_argument(
"--quadruple", "-q",
action="store_true",
help="Put four signatures on 8 A4 sheet. Pages will be a "
"multiple of 64",
)
parser.add_argument(
"--pagespec",
help="Page selection. At the moment only '<start>-<end>' is supported",
default=None,
)
parser.add_argument(
"file",
help="Name of the PDF file",
)
return parser
def main():
parser = get_parser()
args = parser.parse_args()
if not args.pagespec:
if not pypdf:
print("Detecting the number of pages in the pdf requires pypdf")
sys.exit(1)
reader = pypdf.PdfReader(args.file)
start = 1
end = end = len(reader.pages)
else:
pspec = args.pagespec.split('-')
try:
start = int(pspec[0])
end = int(pspec[1])
except ValueError:
parser.print_usage()
except IndexError:
parser.print_usage()
if args.double:
signature = SIGNATURE_32
elif args.quadruple:
signature = SIGNATURE_64
else:
signature = SIGNATURE
sig_len = len(signature)
pages = [str(i) for i in range(start, end+1)]
if len(pages) % sig_len != 0:
empty = sig_len - len(pages) % sig_len
pages = pages + ["{}"] * empty
rearranged = []
while pages:
for i in signature:
rearranged.append(pages[i])
pages = pages[sig_len:]
base, ext = os.path.splitext(args.file)
out_fname = base + '-book' + ext
subprocess.run([
'pdfjam',
'--nup', '2x2',
#'--no-tidy',
'-o', out_fname,
args.file,
','.join(rearranged)
])
if __name__ == "__main__":
main()
|
