From f46c3bbdd29191654b009c26a28cf99a90484fec Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <valhalla@trueelena.org>
Date: Sat, 12 Aug 2023 10:22:29 +0200
Subject: Moved page manipulation scripts into a subdirectory

---
 page_manipulation/a6_book.py | 90 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100755 page_manipulation/a6_book.py

(limited to 'page_manipulation/a6_book.py')

diff --git a/page_manipulation/a6_book.py b/page_manipulation/a6_book.py
new file mode 100755
index 0000000..059a717
--- /dev/null
+++ b/page_manipulation/a6_book.py
@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+
+import argparse
+import os.path
+import subprocess
+
+
+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,
+)
+
+
+def get_parser():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "--file", '-f',
+        help="Name of the PDF file",
+    )
+    parser.add_argument(
+        "--double", "-d",
+        action="store_true",
+        help="Put two signatures on 4 A4 sheet. Pages should be a "
+        "multiple of 32",
+    )
+    parser.add_argument(
+        "pagespec",
+        help="Page selection. At the moment only '<start>-<end>' is supported"
+    )
+    return parser
+
+
+def main():
+    parser = get_parser()
+    args = parser.parse_args()
+    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
+    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()
-- 
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