Make Gradio launch arguments version-compatible for 5.x/6.x

app.py

@@ -6,6 +6,7 @@ import os
 import sys
 import tempfile
 import shutil
+import inspect
 from PIL import Image, ImageDraw, ImageFont, ImageOps
 import fitz
 import re
@@ -1368,7 +1369,14 @@ def update_page_selector(file_path):
                         label=f"Select Page (1-{page_count})")
     return gr.update(visible=False)
 
-with gr.Blocks(title="DeepSeek-OCR-2") as demo:
+blocks_kwargs = {"title": "DeepSeek-OCR-2"}
+if hasattr(gr, "themes") and hasattr(gr.themes, "Soft"):
+    try:
+        blocks_kwargs["theme"] = gr.themes.Soft()
+    except Exception:
+        pass
+
+with gr.Blocks(**blocks_kwargs) as demo:
     gr.Markdown("""
     # 🧮 DeepSeek-OCR-2 — Math Rendering Edition
     **Convert documents to markdown, extract text, parse figures, and locate specific content with bounding boxes.**
@@ -1669,9 +1677,13 @@ if __name__ == "__main__":
     # server_name="0.0.0.0" is needed locally (WSL2 → Windows access)
     # On HuggingFace Spaces, SPACE_ID is set and Gradio handles binding automatically
     local = not os.environ.get("SPACE_ID")
-    demo.queue(max_size=20).launch(
-        theme=gr.themes.Soft(),
-        server_name="0.0.0.0" if local else None,
-        head=PREVIEW_CSS,
-        ssr_mode=False,      # SSR is experimental in Gradio 6 and breaks HF Spaces routing
-    )
+    queued = demo.queue(max_size=20)
+    launch_sig = inspect.signature(queued.launch)
+    launch_kwargs = {}
+    if "server_name" in launch_sig.parameters:
+        launch_kwargs["server_name"] = "0.0.0.0" if local else None
+    if "head" in launch_sig.parameters:
+        launch_kwargs["head"] = PREVIEW_CSS
+    if "ssr_mode" in launch_sig.parameters:
+        launch_kwargs["ssr_mode"] = False  # SSR breaks HF Spaces routing in Gradio 6
+    queued.launch(**launch_kwargs)