39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
"""Pure folder-scan layer for Folder Image Loader. Stdlib only — no torch."""
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import os
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import re
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from pathlib import Path
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IMAGE_EXTS = {".png", ".jpg", ".jpeg", ".webp", ".bmp", ".tif", ".tiff"}
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def natural_key(s):
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return [int(t) if t.isdigit() else t.lower() for t in re.split(r"(\d+)", s)]
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def list_images(folder, depth=0):
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root = Path(folder)
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if not root.is_dir():
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raise NotADirectoryError(f"Not a folder: {folder}")
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root_depth = len(root.parts)
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results = []
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for dirpath, dirnames, filenames in os.walk(root):
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cur = Path(dirpath)
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rel_depth = len(cur.parts) - root_depth
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if depth >= 0 and rel_depth >= depth:
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dirnames[:] = [] # don't descend past `depth`
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if depth >= 0 and rel_depth > depth:
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continue
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for name in filenames:
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if Path(name).suffix.lower() in IMAGE_EXTS:
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results.append(str(cur / name))
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results.sort(key=lambda p: natural_key(os.path.relpath(p, root)))
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return results
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def resolve_index(count, index):
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if count == 0:
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raise FileNotFoundError("No images found in folder")
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if index < 0 or index >= count:
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raise IndexError(f"index {index} out of range: {count} images")
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return index
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