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https://github.com/infiniflow/ragflow.git
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69264b3a70
### What problem does this PR solve? ### Type of change - [x] New Feature (non-breaking change which adds functionality) - [x] Refactoring --------- Co-authored-by: Zhichang Yu <yuzhichang@gmail.com> Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
130 lines
4.2 KiB
Python
130 lines
4.2 KiB
Python
#
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# Copyright 2025 The InfiniFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from rag.flow.chunker.title_chunker.common import (
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BaseTitleChunker,
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resolve_target_level,
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)
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class _ChunkNode:
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def __init__(self, level, title_indexes=None, body_indexes=None):
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self.level = level
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self.title_indexes = title_indexes or []
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self.body_indexes = body_indexes or []
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self.children = []
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def add_child(self, child):
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self.children.append(child)
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def add_body_index(self, index):
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self.body_indexes.append(index)
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def build_tree(self, indexed_lines, depth):
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stack = [self]
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for level, index in indexed_lines:
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if level > depth:
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stack[-1].add_body_index(index)
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continue
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while len(stack) > 1 and level <= stack[-1].level:
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stack.pop()
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node = _ChunkNode(level, title_indexes=[index])
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stack[-1].add_child(node)
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stack.append(node)
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return self
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def get_paths(self, depth, include_heading_content):
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chunk_paths = []
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self._dfs(chunk_paths, [], depth, include_heading_content)
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return chunk_paths
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def _dfs(self, chunk_paths, titles, depth, include_heading_content):
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if self.level == 0 and self.body_indexes:
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chunk_paths.append(titles + self.body_indexes)
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if include_heading_content:
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path_titles = titles + self.title_indexes if 1 <= self.level <= depth else titles
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if self.body_indexes and 1 <= self.level <= depth:
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chunk_paths.append(path_titles + self.body_indexes)
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elif not self.children and 1 <= self.level <= depth:
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chunk_paths.append(path_titles)
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else:
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path_titles = (
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titles + self.title_indexes + self.body_indexes
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if 1 <= self.level <= depth
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else titles
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)
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if not self.children and 1 <= self.level <= depth:
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chunk_paths.append(path_titles)
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for child in self.children:
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child._dfs(chunk_paths, path_titles, depth, include_heading_content)
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class HierarchyTitleChunker(BaseTitleChunker):
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start_message = "Start to merge hierarchically."
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def resolve_levels(self, line_records):
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return self.resolve_title_levels(line_records)
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def build_chunks(self, line_records, resolved):
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record_groups = []
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text_records = []
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text_levels = []
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def flush_text_records():
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if not text_records:
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return
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target_level = resolve_target_level(text_levels, self.param.hierarchy)
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if target_level is None:
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record_groups.append(text_records.copy())
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else:
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root = _ChunkNode(0)
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root.build_tree(list(zip(text_levels, range(len(text_records)))), target_level)
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record_groups.extend(
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[text_records[index] for index in path]
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for path in root.get_paths(
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target_level,
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self.param.include_heading_content,
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)
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if path
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)
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text_records.clear()
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text_levels.clear()
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for record, level in zip(line_records, resolved["levels"]):
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if record["doc_type_kwd"] == "text":
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text_records.append(record)
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text_levels.append(level)
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continue
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flush_text_records()
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record_groups.append([record])
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flush_text_records()
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return self.build_chunks_from_record_groups(record_groups)
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