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
289 lines
10 KiB
Python
289 lines
10 KiB
Python
r"""
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Visitor for <mmultiscripts> (tensor notation) MathML elements.
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The <mmultiscripts> element is used to attach prescripts and postscripts to a base element.
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It's commonly used in physics and chemistry for tensor notation, nuclear notation, etc.
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Structure:
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<mmultiscripts>
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<base/> <!-- Base element -->
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<sub1/> <sup1/> <!-- First postscript pair -->
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<sub2/> <sup2/> <!-- Second postscript pair -->
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<mprescripts/> <!-- Separator -->
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<presub1/> <presup1/> <!-- First prescript pair -->
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<presub2/> <presup2/> <!-- Second prescript pair -->
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</mmultiscripts>
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This visitor handles both prescripts (left side) and postscripts (right side) with \sideset.
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"""
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from lxml import etree as ET
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from ..core.interfaces import Visitor, Strategy
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from ..utils import local_name as _local
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class MmultiscriptsVisitor(Visitor):
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r"""
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Handles <mmultiscripts> (tensor notation) MathML elements.
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Converts prescripts and postscripts to LaTeX using \sideset for bidirectional scripts.
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Examples:
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Only postscripts:
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<mmultiscripts>
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<mi>R</mi>
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<mn>1</mn><mn>2</mn>
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</mmultiscripts>
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→ R_{1}^{2}
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Only prescripts:
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<mmultiscripts>
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<mi>R</mi>
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<mprescripts/>
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<mn>1</mn><mn>2</mn>
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</mmultiscripts>
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→ _{1}^{2}R
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Both prescripts and postscripts:
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<mmultiscripts>
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<mi>R</mi>
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<mn>3</mn><mn>4</mn>
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<mprescripts/>
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<mn>1</mn><mn>2</mn>
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</mmultiscripts>
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→ \sideset{_{1}^{2}}{_{3}^{4}}{R}
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Multiple postscripts:
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<mmultiscripts>
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<mi>R</mi>
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<mi>i</mi><mi>j</mi>
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<mi>k</mi><mi>l</mi>
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</mmultiscripts>
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→ R_{i}^{j}_{k}^{l}
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None elements (empty script positions):
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<mmultiscripts>
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<mi>R</mi>
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<none/><mn>2</mn>
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<mprescripts/>
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<mn>1</mn><none/>
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</mmultiscripts>
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→ \sideset{_{1}}{^{2}}{R}
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"""
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def __init__(self, strategy: Strategy):
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"""Initialize the Mmultiscripts visitor."""
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super().__init__(strategy)
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def visit(self, node: ET.Element) -> str:
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r"""
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Convert <mmultiscripts> element to LaTeX with tensor notation.
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Args:
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node: The <mmultiscripts> element to convert
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Returns:
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LaTeX string with prescripts and postscripts
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Raises:
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ValueError: If node is not a <mmultiscripts> element
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"""
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if not self.can_handle(node):
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raise ValueError(f"MmultiscriptsVisitor cannot handle element '{node.tag}'")
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if len(node) == 0:
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return ""
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# First child is the base element
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base = self._convert_child(node[0])
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scripts = list(node)[1:] # Skip base element
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# Find mprescripts separator
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prescript_idx = None
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for i, child in enumerate(scripts):
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if _local(child.tag) == "mprescripts":
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prescript_idx = i
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break
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if prescript_idx is None:
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# Only postscripts
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postscripts = scripts
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prescripts = []
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else:
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postscripts = scripts[:prescript_idx]
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prescripts = scripts[prescript_idx + 1:]
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# Process postscripts (pairs of sub/sup)
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postscript_parts = self._process_script_pairs(postscripts)
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# Process prescripts (pairs of sub/sup)
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prescript_parts = self._process_script_pairs(prescripts)
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# Use \sideset when there are scripts on both sides
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if prescript_parts and postscript_parts:
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left_scripts = "".join(prescript_parts)
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right_scripts = "".join(postscript_parts)
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return f"\\sideset{{{left_scripts}}}{{{right_scripts}}}{{{base}}}"
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elif prescript_parts:
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# Only left scripts - direct positioning
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return f"{''.join(prescript_parts)}{base}"
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elif postscript_parts:
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# Only right scripts
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return f"{base}{''.join(postscript_parts)}"
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else:
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return base
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def _process_script_pairs(self, scripts: list) -> list:
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"""
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Process script pairs (sub/sup) from the scripts list.
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Scripts come in pairs: subscript, superscript, subscript, superscript, ...
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<none/> elements represent empty positions.
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Args:
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scripts: List of script elements (pairs of sub/sup)
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Returns:
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List of LaTeX script strings
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"""
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parts = []
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for i in range(0, len(scripts), 2):
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sub = self._convert_script(scripts[i]) if i < len(scripts) else ""
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sup = self._convert_script(scripts[i + 1]) if i + 1 < len(scripts) else ""
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if sub and sup:
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parts.append(f"_{{{sub}}}^{{{sup}}}")
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elif sub:
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parts.append(f"_{{{sub}}}")
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elif sup:
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parts.append(f"^{{{sup}}}")
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return parts
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def _convert_script(self, child: ET.Element) -> str:
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"""
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Convert a script element to LaTeX.
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Handles <none/> elements (empty script positions).
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Args:
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child: Script element to convert
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Returns:
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LaTeX string for the script (empty for <none/>)
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"""
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if _local(child.tag) == "none":
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return ""
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return self._convert_child(child)
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def _convert_child(self, child: ET.Element) -> str:
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"""Convert a child element to LaTeX."""
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tag = _local(child.tag)
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# Import visitors as needed to avoid circular imports
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if tag == 'mi':
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from .mi_visitor import MiVisitor
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return MiVisitor(self.strategy).visit(child)
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elif tag == 'mo':
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from .mo_visitor import MoVisitor
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return MoVisitor(self.strategy).visit(child)
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elif tag == 'mn':
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from .mn_visitor import MnVisitor
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return MnVisitor(self.strategy).visit(child)
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elif tag == 'mfrac':
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from .mfrac_visitor import MfracVisitor
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return MfracVisitor(self.strategy).visit(child)
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elif tag == 'msup':
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from .msup_visitor import MsupVisitor
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return MsupVisitor(self.strategy).visit(child)
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elif tag == 'msub':
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from .msub_visitor import MsubVisitor
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return MsubVisitor(self.strategy).visit(child)
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elif tag == 'mrow':
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from .mrow_visitor import MrowVisitor
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return MrowVisitor(self.strategy).visit(child)
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elif tag == 'msqrt':
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from .msqrt_visitor import MsqrtVisitor
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return MsqrtVisitor(self.strategy).visit(child)
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elif tag == 'mroot':
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from .mroot_visitor import MrootVisitor
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return MrootVisitor(self.strategy).visit(child)
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elif tag == 'msubsup':
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from .msubsup_visitor import MsubsupVisitor
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return MsubsupVisitor(self.strategy).visit(child)
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elif tag == 'munder':
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from .munder_visitor import MunderVisitor
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return MunderVisitor(self.strategy).visit(child)
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elif tag == 'mover':
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from .mover_visitor import MoverVisitor
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return MoverVisitor(self.strategy).visit(child)
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elif tag == 'munderover':
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from .munderover_visitor import MunderoverVisitor
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return MunderoverVisitor(self.strategy).visit(child)
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elif tag == 'mfenced':
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from .mfenced_visitor import MfencedVisitor
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return MfencedVisitor(self.strategy).visit(child)
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elif tag == 'mtable':
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from .mtable_visitor import MtableVisitor
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return MtableVisitor(self.strategy).visit(child)
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elif tag == 'mtext':
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from .mtext_visitor import MtextVisitor
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return MtextVisitor(self.strategy).visit(child)
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elif tag == 'mstyle':
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from .mstyle_visitor import MstyleVisitor
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return MstyleVisitor(self.strategy).visit(child)
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elif tag == 'mspace':
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from .mspace_visitor import MspaceVisitor
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return MspaceVisitor(self.strategy).visit(child)
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elif tag == 'menclose':
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from .menclose_visitor import MencloseVisitor
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return MencloseVisitor(self.strategy).visit(child)
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elif tag == 'mmultiscripts':
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from .mmultiscripts_visitor import MmultiscriptsVisitor
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return MmultiscriptsVisitor(self.strategy).visit(child)
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elif tag == 'maction':
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from .maction_visitor import MactionVisitor
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return MactionVisitor(self.strategy).visit(child)
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elif tag == 'merror':
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from .merror_visitor import MerrorVisitor
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return MerrorVisitor(self.strategy).visit(child)
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elif tag == 'mpadded':
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from .mpadded_visitor import MpaddedVisitor
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return MpaddedVisitor(self.strategy).visit(child)
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elif tag == 'mphantom':
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from .mphantom_visitor import MphantomVisitor
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return MphantomVisitor(self.strategy).visit(child)
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elif tag == 'ms':
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from .ms_visitor import MsVisitor
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return MsVisitor(self.strategy).visit(child)
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elif tag == 'mglyph':
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from .mglyph_visitor import MglyphVisitor
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return MglyphVisitor(self.strategy).visit(child)
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elif tag == 'maligngroup':
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from .maligngroup_visitor import MaligngroupVisitor
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return MaligngroupVisitor(self.strategy).visit(child)
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elif tag == 'malignmark':
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from .malignmark_visitor import MalignmarkVisitor
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return MalignmarkVisitor(self.strategy).visit(child)
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elif tag == 'mlabeledtr':
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from .mlabeledtr_visitor import MlabeledtrVisitor
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return MlabeledtrVisitor(self.strategy).visit(child)
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else:
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# Fallback: return text content for unknown elements
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import sys
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print(f"[WARNING] Unknown element <{tag}> in mmultiscripts, using text fallback", file=sys.stderr)
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return _text_content(child)
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def can_handle(self, node: ET.Element) -> bool:
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"""Check if this visitor can handle the given node."""
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return _local(node.tag) == 'mmultiscripts'
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@property
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def element_name(self) -> str:
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"""Get the element name this visitor handles."""
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return 'mmultiscripts'
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def __repr__(self) -> str:
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"""String representation for debugging."""
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return f"MmultiscriptsVisitor(strategy={self.strategy.name})"
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