two version of R2R are hereHEADmaster

1 files changed, 51 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/pypdf/papersizes.py b/.venv/lib/python3.12/site-packages/pypdf/papersizes.py
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+++ b/.venv/lib/python3.12/site-packages/pypdf/papersizes.py
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+"""Helper to get paper sizes."""
+
+from typing import NamedTuple
+
+
+class Dimensions(NamedTuple):
+    width: int
+    height: int
+
+
+class PaperSize:
+    """(width, height) of the paper in portrait mode in pixels at 72 ppi."""
+
+    # Notes how to calculate it:
+    # 1. Get the size of the paper in mm
+    # 2. Convert it to inches (25.4 millimeters are equal to 1 inches)
+    # 3. Convert it to pixels ad 72dpi (1 inch is equal to 72 pixels)
+
+    # All Din-A paper sizes follow this pattern:
+    # 2xA(n-1) = A(n)
+    # So the height of the next bigger one is the width of the smaller one
+    # The ratio is always approximately the ratio 1:2**0.5
+    # Additionally, A0 is defined to have an area of 1 m**2
+    # Be aware of rounding issues!
+    A0 = Dimensions(2384, 3370)  # 841mm x 1189mm
+    A1 = Dimensions(1684, 2384)
+    A2 = Dimensions(1191, 1684)
+    A3 = Dimensions(842, 1191)
+    A4 = Dimensions(
+        595, 842
+    )  # Printer paper, documents - this is by far the most common
+    A5 = Dimensions(420, 595)  # Paperback books
+    A6 = Dimensions(298, 420)  # Postcards
+    A7 = Dimensions(210, 298)
+    A8 = Dimensions(147, 210)
+
+    # Envelopes
+    C4 = Dimensions(649, 918)
+
+
+_din_a = (
+    PaperSize.A0,
+    PaperSize.A1,
+    PaperSize.A2,
+    PaperSize.A3,
+    PaperSize.A4,
+    PaperSize.A5,
+    PaperSize.A6,
+    PaperSize.A7,
+    PaperSize.A8,
+)