To Bookmaker, add margin definition.

[misc] / bookmaker.py

diff --git a/bookmaker.py b/bookmaker.py
index e6c8d2aa7a0375452bcd305973f43e9e30ad408f..2e5085f71191ec4db48f39b830d38e0ded4dd6e0 100755 (executable)
--- a/bookmaker.py
+++ b/bookmaker.py
@@ -15,6 +15,7 @@ parser.add_argument("-a", "--analyze", dest="analyze", action="store_true", help
 parser.add_argument("-t", "--symmetry", dest="symmetry", action="store_true", help="alternate horizontal crops between odd and even pages")
 parser.add_argument("-s", "--second", dest="second", help="append second file as input to append")
 parser.add_argument("-r", "--rotate", dest="rotate", help="rotate page of number by 90°")
+parser.add_argument("-m", "--margin", type=float, default=4.3, help="print margin (default 4.3)")
 args = parser.parse_args()
 
 with open(args.input_file, 'rb') as file:
@@ -85,9 +86,9 @@ with open(args.input_file, 'rb') as file:
         odd_page = True
         for page in pages_to_add:
             if args.symmetry and odd_page:
-                page.add_transformation(pypdf.Transformation().translate(tx=-crop_left, ty=-crop_bottom))
-            else:
                 page.add_transformation(pypdf.Transformation().translate(tx=-crop_right, ty=-crop_bottom))
+            else:
+                page.add_transformation(pypdf.Transformation().translate(tx=-crop_left, ty=-crop_bottom))
             page.add_transformation(pypdf.Transformation().scale(zoom, zoom))
             page.mediabox.right = cropped_width * zoom
             page.mediabox.top = cropped_height * zoom
@@ -96,7 +97,7 @@ with open(args.input_file, 'rb') as file:
     else:
         n_pages_per_axis = 2
         points_per_mm = 2.83465
-        printable_margin = 4.3 * points_per_mm
+        printable_margin = args.margin * points_per_mm
         printable_scale = (a4_width - 2*printable_margin)/a4_width
         spine_limit = 10 * points_per_mm
         half_width = a4_width / n_pages_per_axis 
@@ -138,11 +139,14 @@ with open(args.input_file, 'rb') as file:
             page.add_transformation(pypdf.Transformation().translate(ty=(a4_height / zoom - (a4_height - crop_top))))
             if i == 0 or i == 2:
                 if args.symmetry:
-                    page.add_transformation(pypdf.Transformation().translate(tx=-crop_right))
-                else:
                     page.add_transformation(pypdf.Transformation().translate(tx=-crop_left))
+                else:
+                    page.add_transformation(pypdf.Transformation().translate(tx=-crop_right))
             elif i == 1 or i == 3:
-                page.add_transformation(pypdf.Transformation().translate(tx=(a4_width / zoom - (a4_width - crop_right))))
+                if args.symmetry:
+                    page.add_transformation(pypdf.Transformation().translate(tx=(a4_width / zoom - (a4_width - crop_left))))
+                else:
+                    page.add_transformation(pypdf.Transformation().translate(tx=(a4_width / zoom - (a4_width - crop_right))))
             page.add_transformation(pypdf.Transformation().scale(zoom * bonus_shrink_factor, zoom * bonus_shrink_factor))
             if i == 2 or i == 3:
                 page.add_transformation(pypdf.Transformation().translate(ty=-2*printable_margin/printable_scale))