Feat: add more chunking method (#11413)

### What problem does this PR solve?

Feat: add more chunking method #11311

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

rag/app/paper.py

@@ -21,8 +21,10 @@ import re
 from deepdoc.parser.figure_parser import vision_figure_parser_pdf_wrapper
 from common.constants import ParserType
 from rag.nlp import rag_tokenizer, tokenize, tokenize_table, add_positions, bullets_category, title_frequency, tokenize_chunks
-from deepdoc.parser import PdfParser, PlainParser
+from deepdoc.parser import PdfParser
 import numpy as np
+from rag.app.naive import by_plaintext, PARSERS
+
 
 class Pdf(PdfParser):
     def __init__(self):
@@ -147,19 +149,40 @@ def chunk(filename, binary=None, from_page=0, to_page=100000,
         "parser_config", {
             "chunk_token_num": 512, "delimiter": "\n!?。；！？", "layout_recognize": "DeepDOC"})
     if re.search(r"\.pdf$", filename, re.IGNORECASE):
-        if parser_config.get("layout_recognize", "DeepDOC") == "Plain Text":
-            pdf_parser = PlainParser()
+        layout_recognizer = parser_config.get("layout_recognize", "DeepDOC")
+        
+        if isinstance(layout_recognizer, bool):
+            layout_recognizer = "DeepDOC" if layout_recognizer else "Plain Text"
+
+        name = layout_recognizer.strip().lower()
+        pdf_parser = PARSERS.get(name, by_plaintext)
+        callback(0.1, "Start to parse.")
+
+        if name == "deepdoc":
+            pdf_parser = Pdf()
+            paper = pdf_parser(filename if not binary else binary,
+                               from_page=from_page, to_page=to_page, callback=callback)
+        else:
+            sections, tables, pdf_parser = pdf_parser(
+                filename=filename,
+                binary=binary,
+                from_page=from_page,
+                to_page=to_page,
+                lang=lang,
+                callback=callback,
+                pdf_cls=Pdf,
+                parse_method="paper",
+                **kwargs
+            )
+
             paper = {
                 "title": filename,
                 "authors": " ",
                 "abstract": "",
-                "sections": pdf_parser(filename if not binary else binary, from_page=from_page, to_page=to_page)[0],
-                "tables": []
+                "sections": sections,
+                "tables": tables
             }
-        else:
-            pdf_parser = Pdf()
-            paper = pdf_parser(filename if not binary else binary,
-                               from_page=from_page, to_page=to_page, callback=callback)
+
         tbls=paper["tables"]
         tbls=vision_figure_parser_pdf_wrapper(tbls=tbls,callback=callback,**kwargs)
         paper["tables"] = tbls