mirror of
https://github.com/github/awesome-copilot.git
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177 lines
6.6 KiB
Python
Executable File
177 lines
6.6 KiB
Python
Executable File
#!/usr/bin/env python3
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"""Convert a PDF to an HTML presentation.
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Each page is rendered as a PNG image (via pdftoppm). Supports external assets
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mode for large files to avoid huge single-file HTML.
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Requirements: poppler-utils (pdftoppm)
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"""
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import argparse
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import base64
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import glob
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import os
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import subprocess
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import sys
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import tempfile
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from pathlib import Path
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def get_page_count(pdf_path):
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"""Get page count using pdfinfo if available."""
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try:
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result = subprocess.run(["pdfinfo", pdf_path], capture_output=True, text=True)
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for line in result.stdout.splitlines():
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if line.startswith("Pages:"):
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return int(line.split(":")[1].strip())
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except:
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pass
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return None
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def convert(pdf_path: str, output_path: str | None = None, dpi: int = 150, external_assets=None):
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pdf_path = str(Path(pdf_path).resolve())
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if not Path(pdf_path).exists():
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print(f"Error: {pdf_path} not found")
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sys.exit(1)
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if subprocess.run(["which", "pdftoppm"], capture_output=True).returncode != 0:
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print("Error: pdftoppm not found. Install poppler-utils:")
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print(" apt install poppler-utils # Debian/Ubuntu")
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print(" brew install poppler # macOS")
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sys.exit(1)
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file_size_mb = os.path.getsize(pdf_path) / (1024 * 1024)
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if file_size_mb > 150:
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print(f"WARNING: PDF is {file_size_mb:.0f}MB — conversion may be slow and memory-intensive.")
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page_count = get_page_count(pdf_path)
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# Auto-detect external assets mode
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if external_assets is None:
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external_assets = file_size_mb > 20 or (page_count is not None and page_count > 50)
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if external_assets:
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print(f"Auto-enabling external assets mode (file: {file_size_mb:.1f}MB, pages: {page_count or 'unknown'})")
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output = output_path or str(Path(pdf_path).with_suffix('.html'))
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output_dir = Path(output).parent
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if external_assets:
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assets_dir = output_dir / "assets"
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assets_dir.mkdir(parents=True, exist_ok=True)
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with tempfile.TemporaryDirectory() as tmpdir:
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prefix = os.path.join(tmpdir, "page")
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result = subprocess.run(
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["pdftoppm", "-png", "-r", str(dpi), pdf_path, prefix],
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capture_output=True, text=True
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)
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if result.returncode != 0:
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print(f"Error converting PDF: {result.stderr}")
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sys.exit(1)
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pages = sorted(glob.glob(f"{prefix}-*.png"))
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if not pages:
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print("Error: No pages rendered from PDF")
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sys.exit(1)
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slides_html = []
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for i, page_path in enumerate(pages, 1):
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with open(page_path, "rb") as f:
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page_bytes = f.read()
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if external_assets:
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img_name = f"img-{i:03d}.png"
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(assets_dir / img_name).write_bytes(page_bytes)
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src = f"assets/{img_name}"
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else:
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b64 = base64.b64encode(page_bytes).decode()
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src = f"data:image/png;base64,{b64}"
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slides_html.append(
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f'<section class="slide">'
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f'<div class="slide-inner">'
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f'<img src="{src}" alt="Page {i}">'
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f'</div></section>'
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)
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title = Path(pdf_path).stem.replace("-", " ").replace("_", " ")
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html = f'''<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>{title}</title>
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<style>
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* {{ margin: 0; padding: 0; box-sizing: border-box; }}
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html, body {{ height: 100%; overflow: hidden; background: #000; }}
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.slide {{ width: 100vw; height: 100vh; display: none; align-items: center; justify-content: center; }}
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.slide.active {{ display: flex; }}
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.slide-inner {{ display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; }}
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.slide-inner img {{ max-width: 100%; max-height: 100%; object-fit: contain; }}
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.progress {{ position: fixed; bottom: 0; left: 0; height: 4px; background: #0366d6; transition: width 0.3s; z-index: 100; }}
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.counter {{ position: fixed; bottom: 12px; right: 20px; font-size: 14px; color: rgba(255,255,255,0.4); z-index: 100; }}
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</style>
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</head>
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<body>
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{chr(10).join(slides_html)}
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<div class="progress" id="progress"></div>
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<div class="counter" id="counter"></div>
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<script>
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const slides = document.querySelectorAll('.slide');
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let current = 0;
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function show(n) {{
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slides.forEach(s => s.classList.remove('active'));
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current = Math.max(0, Math.min(n, slides.length - 1));
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slides[current].classList.add('active');
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document.getElementById('progress').style.width = ((current + 1) / slides.length * 100) + '%';
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document.getElementById('counter').textContent = (current + 1) + ' / ' + slides.length;
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}}
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document.addEventListener('keydown', e => {{
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if (e.key === 'ArrowRight' || e.key === ' ') {{ e.preventDefault(); show(current + 1); }}
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if (e.key === 'ArrowLeft') {{ e.preventDefault(); show(current - 1); }}
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}});
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let touchStartX = 0;
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document.addEventListener('touchstart', e => {{ touchStartX = e.changedTouches[0].screenX; }});
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document.addEventListener('touchend', e => {{
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const diff = e.changedTouches[0].screenX - touchStartX;
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if (Math.abs(diff) > 50) {{ diff > 0 ? show(current - 1) : show(current + 1); }}
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}});
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document.addEventListener('click', e => {{
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if (e.clientX > window.innerWidth / 2) show(current + 1);
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else show(current - 1);
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}});
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show(0);
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</script>
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</body></html>'''
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Path(output).write_text(html, encoding='utf-8')
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output_size = os.path.getsize(output)
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print(f"Converted to: {output}")
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print(f"Pages: {len(slides_html)}")
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print(f"Output size: {output_size / (1024*1024):.1f}MB")
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print(f"External assets: {'yes' if external_assets else 'no'}")
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if __name__ == "__main__":
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parser = argparse.ArgumentParser(description="Convert PDF to HTML presentation")
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parser.add_argument("input", help="Path to .pdf file")
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parser.add_argument("output", nargs="?", help="Output HTML path (default: same name with .html)")
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parser.add_argument("--external-assets", action="store_true", default=None,
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help="Save page images as separate files in assets/ directory (auto-detected for large files)")
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parser.add_argument("--no-external-assets", action="store_true",
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help="Force inline base64 even for large files")
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parser.add_argument("--dpi", type=int, default=150, help="Render DPI (default: 150)")
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args = parser.parse_args()
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ext_assets = None
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if args.external_assets:
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ext_assets = True
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elif args.no_external_assets:
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ext_assets = False
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convert(args.input, args.output, dpi=args.dpi, external_assets=ext_assets)
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