34 lines
1.7 KiB
Python
34 lines
1.7 KiB
Python
#!/usr/bin/env python3
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"""Generate synthetic read-only comment keyboard fixtures, without dependencies."""
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from pathlib import Path
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objects = [
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b'<< /Type /Catalog /Pages 2 0 R >>',
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b'<< /Type /Pages /Kids [3 0 R] /Count 1 >>',
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b'<< /Type /Page /Parent 2 0 R /MediaBox [0 0 240 260] /CropBox [20 30 220 230] /Annots [4 0 R 5 0 R] /Resources << >> >>',
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b'<< /Type /Annot /Subtype /Text /Rect [100 100 120 120] /Contents (<b>Literal comment</b>) /F 4 >>',
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b'<< /Type /Annot /Subtype /Text /Rect [1000 1000 1020 1020] /Contents (Outside CropBox comment) /F 4 >>',
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]
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data = bytearray(b'%PDF-1.7\n%\xe2\xe3\xcf\xd3\n')
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offsets = [0]
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for index, obj in enumerate(objects, 1):
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offsets.append(len(data))
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data += f'{index} 0 obj\n'.encode() + obj + b'\nendobj\n'
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xref = len(data)
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data += f'xref\n0 {len(offsets)}\n0000000000 65535 f \n'.encode()
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for offset in offsets[1:]:
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data += f'{offset:010d} 00000 n \n'.encode()
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data += f'trailer\n<< /Size {len(offsets)} /Root 1 0 R >>\nstartxref\n{xref}\n%%EOF\n'.encode()
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Path(__file__).with_name('comments.pdf').write_bytes(data)
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# Sub-pixel page at 25% zoom: keyboard focus must not invert scroll bounds.
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tiny = bytes(data)
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for original, replacement in [(b'[0 0 240 260]', b'[0 0 1 1]'),
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(b'[20 30 220 230]', b'[0 0 1 1]'),
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(b'[100 100 120 120]', b'[0 0 0.5 0.5]'),
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(b'[1000 1000 1020 1020]', b'[0 0 0.5 0.5]')]:
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tiny = tiny.replace(original, replacement.ljust(len(original), b' '))
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# Preserve fixed byte widths so the original xref remains exact.
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assert len(tiny) == len(data)
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Path(__file__).with_name('tiny-comments.pdf').write_bytes(tiny)
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