87 lines
3.4 KiB
Python
87 lines
3.4 KiB
Python
# flake8: noqa
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# yapf: disable
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import sys
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from dataclasses import dataclass
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import json
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# Script to check that the `fields.json` file that Claude creates when analyzing PDFs
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# does not have overlapping bounding boxes. See forms.md.
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@dataclass
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class RectAndField:
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rect: list[float]
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rect_type: str
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field: dict
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# Returns a list of messages that are printed to stdout for Claude to read.
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def get_bounding_box_messages(fields_json_stream) -> list[str]:
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messages = []
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fields = json.load(fields_json_stream)
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messages.append(f"Read {len(fields['form_fields'])} fields")
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def rects_intersect(r1, r2):
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disjoint_horizontal = r1[0] >= r2[2] or r1[2] <= r2[0]
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disjoint_vertical = r1[1] >= r2[3] or r1[3] <= r2[1]
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return not (disjoint_horizontal or disjoint_vertical)
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rects_and_fields = []
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for f in fields['form_fields']:
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rects_and_fields.append(
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RectAndField(f['label_bounding_box'], 'label', f))
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rects_and_fields.append(
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RectAndField(f['entry_bounding_box'], 'entry', f))
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has_error = False
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for i, ri in enumerate(rects_and_fields):
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# This is O(N^2); we can optimize if it becomes a problem.
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for j in range(i + 1, len(rects_and_fields)):
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rj = rects_and_fields[j]
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if ri.field['page_number'] == rj.field[
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'page_number'] and rects_intersect(ri.rect, rj.rect):
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has_error = True
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if ri.field is rj.field:
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messages.append(
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f"FAILURE: intersection between label and entry bounding boxes for `{ri.field['description']}` ({ri.rect}, {rj.rect})"
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)
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else:
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messages.append(
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f"FAILURE: intersection between {ri.rect_type} bounding box for `{ri.field['description']}` ({ri.rect}) and {rj.rect_type} bounding box for `{rj.field['description']}` ({rj.rect})"
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)
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if len(messages) >= 20:
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messages.append(
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'Aborting further checks; fix bounding boxes and try again'
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)
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return messages
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if ri.rect_type == 'entry':
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if 'entry_text' in ri.field:
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font_size = ri.field['entry_text'].get('font_size', 14)
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entry_height = ri.rect[3] - ri.rect[1]
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if entry_height < font_size:
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has_error = True
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messages.append(
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f"FAILURE: entry bounding box height ({entry_height}) for `{ri.field['description']}` is too short for the text content (font size: {font_size}). Increase the box height or decrease the font size."
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)
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if len(messages) >= 20:
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messages.append(
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'Aborting further checks; fix bounding boxes and try again'
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)
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return messages
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if not has_error:
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messages.append('SUCCESS: All bounding boxes are valid')
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return messages
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if __name__ == '__main__':
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if len(sys.argv) != 2:
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print('Usage: check_bounding_boxes.py [fields.json]')
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sys.exit(1)
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# Input file should be in the `fields.json` format described in forms.md.
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with open(sys.argv[1]) as f:
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messages = get_bounding_box_messages(f)
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for msg in messages:
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print(msg)
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