Quentin
3271fee5cc
服务：Spring Boot 3.2 + docx4j 8.3.9，POST /api/v3/server_office_file/file/parse
接受 .docx，返回 HTML（公式 → LaTeX，图片 → RustFS 外链）
公式支持三类来源：
- OMML（Word 2007+ 公式） → Python omml_mathml2latex
- MathType OLE 对象 → Ruby mathtype2mathml → MathML → LaTeX
- Word EQ 域（老教辅主力） → EqToLatexUtil（本次新增）
本次改动：
1. 新增 java-svc/.../core/EqToLatexUtil.java：
移植自 jby backend-services office-core，EQ 语法 → LaTeX
（\f→\dfrac、\r→\sqrt、\i→\int/\sum/\prod、\s→^{}/_{}、\b→\left\right、
\a→array、\x→\boxed/\overline、\o\al 堆叠、圈码、化学符号、极限、连等式）
品牌标记 JBYU* → WPU*，与采集端一致
2. CtoMathFinder：接上 EQ 分支（原为 not-ported 桩），域代码经
EqToLatexUtil.convert 转 LaTeX 写入 eqLatexMap（WPEQNUM 占位符）
3. WordParseUtil.dealPlaceholder：EQ 的 LaTeX 同样加 \( \) 包裹
（原先因 WPEQNUM 例外不加包裹，前端/MathJax 不渲染）
修前症状：教辅 Word 里分式/方程组/上下标整段丢失（如 {−1/3, 1} 变成 {－，1}）
修后实测：46 份教辅 2908 处 EQ 域全部还原，公式总数 2954 处、零未包裹残留
安全：application.yml（含 RustFS 密钥）不入库，提供 application.yml.example；
OssService 的 @Value 默认密钥已清空
202 lines
7.8 KiB
Python
202 lines
7.8 KiB
Python
r"""
|
|
Visitor for <mroot> (nth root) MathML elements.
|
|
|
|
The <mroot> element represents nth roots with explicit index.
|
|
The LaTeX conversion uses \sqrt[n]{...} notation.
|
|
|
|
Note: When index is 2, optimizes to \sqrt{...} (standard square root).
|
|
"""
|
|
|
|
from lxml import etree as ET
|
|
from ..core.interfaces import Visitor, Strategy
|
|
from ..utils import text_content as _text_content, local_name as _local
|
|
|
|
|
|
class MrootVisitor(Visitor):
|
|
r"""
|
|
Handles <mroot> (nth root) MathML elements.
|
|
|
|
Converts nth root expressions to LaTeX \sqrt[n]{...} notation.
|
|
Optimizes square roots (index=2) to \sqrt{...}.
|
|
|
|
Examples:
|
|
Cube root:
|
|
<mroot><mi>x</mi><mn>3</mn></mroot> → \sqrt[3]{x}
|
|
|
|
Fourth root:
|
|
<mroot><mn>16</mn><mn>4</mn></mroot> → \sqrt[4]{16}
|
|
|
|
Square root (optimized):
|
|
<mroot><mi>x</mi><mn>2</mn></mroot> → \sqrt{x}
|
|
|
|
Variable index:
|
|
<mroot><mi>x</mi><mi>n</mi></mroot> → \sqrt[n]{x}
|
|
|
|
Complex base:
|
|
<mroot>
|
|
<mrow><mi>x</mi><mo>+</mo><mn>1</mn></mrow>
|
|
<mn>3</mn>
|
|
</mroot>
|
|
→ \sqrt[3]{x + 1}
|
|
"""
|
|
|
|
def __init__(self, strategy: Strategy):
|
|
"""Initialize the Mroot visitor."""
|
|
super().__init__(strategy)
|
|
|
|
def visit(self, node: ET.Element) -> str:
|
|
r"""
|
|
Convert <mroot> element to LaTeX.
|
|
|
|
Args:
|
|
node: The <mroot> element to convert
|
|
|
|
Returns:
|
|
LaTeX nth root string (\sqrt[n]{content} or \sqrt{content})
|
|
|
|
Raises:
|
|
ValueError: If node is not an <mroot> element
|
|
ValueError: If mroot has fewer than 2 children
|
|
"""
|
|
if not self.can_handle(node):
|
|
raise ValueError(f"MrootVisitor cannot handle element '{node.tag}'")
|
|
|
|
children = list(node)
|
|
|
|
# mroot must have exactly 2 children: base and index
|
|
# Handle malformed input gracefully for MathJax compatibility
|
|
if len(children) < 2:
|
|
if len(children) == 0:
|
|
return "\\sqrt{}"
|
|
elif len(children) == 1:
|
|
# Only base provided, assume square root
|
|
base = self._convert_child(children[0])
|
|
return f"\\sqrt{self._brace(base)}"
|
|
|
|
# Convert base (radicand) and index (root degree)
|
|
base = self._convert_child(children[0])
|
|
index = self._convert_child(children[1])
|
|
|
|
# Optimize: omit [2] for square roots (standard mathematical notation)
|
|
# Also omit empty brackets [] when index is empty
|
|
index_stripped = index.strip()
|
|
if index_stripped == "2" or not index_stripped:
|
|
return f"\\sqrt{self._brace(base)}"
|
|
else:
|
|
return f"\\sqrt[{index}]{self._brace(base)}"
|
|
|
|
def _convert_child(self, child: ET.Element) -> str:
|
|
"""Convert a child element to LaTeX."""
|
|
tag = _local(child.tag)
|
|
|
|
# Import visitors as needed to avoid circular imports
|
|
if tag == 'mi':
|
|
from .mi_visitor import MiVisitor
|
|
return MiVisitor(self.strategy).visit(child)
|
|
elif tag == 'mo':
|
|
from .mo_visitor import MoVisitor
|
|
return MoVisitor(self.strategy).visit(child)
|
|
elif tag == 'mn':
|
|
from .mn_visitor import MnVisitor
|
|
return MnVisitor(self.strategy).visit(child)
|
|
elif tag == 'mfrac':
|
|
from .mfrac_visitor import MfracVisitor
|
|
return MfracVisitor(self.strategy).visit(child)
|
|
elif tag == 'msup':
|
|
from .msup_visitor import MsupVisitor
|
|
return MsupVisitor(self.strategy).visit(child)
|
|
elif tag == 'msub':
|
|
from .msub_visitor import MsubVisitor
|
|
return MsubVisitor(self.strategy).visit(child)
|
|
elif tag == 'mrow':
|
|
from .mrow_visitor import MrowVisitor
|
|
return MrowVisitor(self.strategy).visit(child)
|
|
elif tag == 'msqrt':
|
|
from .msqrt_visitor import MsqrtVisitor
|
|
return MsqrtVisitor(self.strategy).visit(child)
|
|
elif tag == 'mroot':
|
|
from .mroot_visitor import MrootVisitor
|
|
return MrootVisitor(self.strategy).visit(child)
|
|
elif tag == 'msubsup':
|
|
from .msubsup_visitor import MsubsupVisitor
|
|
return MsubsupVisitor(self.strategy).visit(child)
|
|
elif tag == 'munder':
|
|
from .munder_visitor import MunderVisitor
|
|
return MunderVisitor(self.strategy).visit(child)
|
|
elif tag == 'mover':
|
|
from .mover_visitor import MoverVisitor
|
|
return MoverVisitor(self.strategy).visit(child)
|
|
elif tag == 'munderover':
|
|
from .munderover_visitor import MunderoverVisitor
|
|
return MunderoverVisitor(self.strategy).visit(child)
|
|
elif tag == 'mfenced':
|
|
from .mfenced_visitor import MfencedVisitor
|
|
return MfencedVisitor(self.strategy).visit(child)
|
|
elif tag == 'mtable':
|
|
from .mtable_visitor import MtableVisitor
|
|
return MtableVisitor(self.strategy).visit(child)
|
|
elif tag == 'mtext':
|
|
from .mtext_visitor import MtextVisitor
|
|
return MtextVisitor(self.strategy).visit(child)
|
|
elif tag == 'mstyle':
|
|
from .mstyle_visitor import MstyleVisitor
|
|
return MstyleVisitor(self.strategy).visit(child)
|
|
elif tag == 'mspace':
|
|
from .mspace_visitor import MspaceVisitor
|
|
return MspaceVisitor(self.strategy).visit(child)
|
|
elif tag == 'menclose':
|
|
from .menclose_visitor import MencloseVisitor
|
|
return MencloseVisitor(self.strategy).visit(child)
|
|
elif tag == 'mmultiscripts':
|
|
from .mmultiscripts_visitor import MmultiscriptsVisitor
|
|
return MmultiscriptsVisitor(self.strategy).visit(child)
|
|
elif tag == 'maction':
|
|
from .maction_visitor import MactionVisitor
|
|
return MactionVisitor(self.strategy).visit(child)
|
|
elif tag == 'merror':
|
|
from .merror_visitor import MerrorVisitor
|
|
return MerrorVisitor(self.strategy).visit(child)
|
|
elif tag == 'mpadded':
|
|
from .mpadded_visitor import MpaddedVisitor
|
|
return MpaddedVisitor(self.strategy).visit(child)
|
|
elif tag == 'mphantom':
|
|
from .mphantom_visitor import MphantomVisitor
|
|
return MphantomVisitor(self.strategy).visit(child)
|
|
elif tag == 'ms':
|
|
from .ms_visitor import MsVisitor
|
|
return MsVisitor(self.strategy).visit(child)
|
|
elif tag == 'mglyph':
|
|
from .mglyph_visitor import MglyphVisitor
|
|
return MglyphVisitor(self.strategy).visit(child)
|
|
elif tag == 'maligngroup':
|
|
from .maligngroup_visitor import MaligngroupVisitor
|
|
return MaligngroupVisitor(self.strategy).visit(child)
|
|
elif tag == 'malignmark':
|
|
from .malignmark_visitor import MalignmarkVisitor
|
|
return MalignmarkVisitor(self.strategy).visit(child)
|
|
elif tag == 'mlabeledtr':
|
|
from .mlabeledtr_visitor import MlabeledtrVisitor
|
|
return MlabeledtrVisitor(self.strategy).visit(child)
|
|
else:
|
|
# Fallback: return text content for unknown elements
|
|
import sys
|
|
print(f"[WARNING] Unknown element <{tag}> in mroot, using text fallback", file=sys.stderr)
|
|
return _text_content(child)
|
|
|
|
def _brace(self, content: str) -> str:
|
|
"""Wrap content in braces."""
|
|
return f"{{{content}}}"
|
|
|
|
def can_handle(self, node: ET.Element) -> bool:
|
|
"""Check if this visitor can handle the given node."""
|
|
return _local(node.tag) == 'mroot'
|
|
|
|
@property
|
|
def element_name(self) -> str:
|
|
"""Get the element name this visitor handles."""
|
|
return 'mroot'
|
|
|
|
def __repr__(self) -> str:
|
|
"""String representation for debugging."""
|
|
return f"MrootVisitor(strategy={self.strategy.name})"
|