pdf2zine.py: add rudimentary landscape option

pdf2zine.py

@@ -31,31 +31,22 @@ def get_arguments():
         action='store',
         default=0,
         help='')
-    parser.add_argument('-l', '--landscape', 
-        dest='landscape', 
-        type=int,
-        action='store',
-        default=0,
-        help='')
+    parser.add_argument('-l', '--landscape', action='store_true', default=0)
     args = parser.parse_args()
     return args
-args = get_arguments()
-
-signature_size=args.signature
-if signature_size < 0 : 
-#    print("signature size must be greater than 0!")
-    print("signature size must be non-negative integer!")
-    exit(1)
-
-reader = PdfReader(args.pdf_file)
-number_of_pages = len(reader.pages)
-#page = reader.pages[0]
-#text = page.extract_text()
 
+def get_landscape_seq(number_of_pages: int, signature_size: int):
     pages=number_of_pages
-#print(pages)
+    sheets=int(pages/4)+1
+    n=sheets
+    page_sequence=[]
+    for i in range(n): 
+        page_sequence.append(2*i+1)
+        page_sequence.append(2*i+1+2*n)
+        page_sequence.append(2*i+2); 
+        page_sequence.append(2*i+2+2*n);
+    return page_sequence
 
-lst=[]
 
 def get_reorder(number_of_pages: int, signature_size: int):
     # TODO:
@@ -230,9 +221,29 @@ def make_zine(reader, lst):
     #        )
     return writer
 
+args = get_arguments()
 
+signature_size=args.signature
+if signature_size < 0 : 
+#    print("signature size must be greater than 0!")
+    print("signature size must be non-negative integer!")
+    exit(1)
+
+reader = PdfReader(args.pdf_file)
+number_of_pages = len(reader.pages)
+#page = reader.pages[0]
+#text = page.extract_text()
+
+pages=number_of_pages
+#print(pages)
+
+lst=[]
 
 lst=get_reorder(number_of_pages, signature_size)
+#lst=get_reorder(number_of_pages, signature_size)
+if args.landscape:
+    lst=get_landscape_seq(number_of_pages, signature_size)
+    
 if args.zine :
     if number_of_pages != 16:
         #TODO: if number of pages%16 != 0 : fill up with blank pages