fix(plot): 修复复审问题(2 P2 + 1 P3)
- P2 复杂表达式绕过异常回退:解析与渲染共同纳入局部异常回退; AST 深度/节点数上限拦截 RecursionError - P2 极端有限范围生成 nan SVG:校验坐标跨度有限且 >0,回退安全范围; _polyline 拒绝非有限像素坐标 - P3 更新接口契约文档:function-plot 静态 SVG 已实现 Co-Authored-By: Claude Code <noreply@anthropic.com>
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@@ -203,16 +203,17 @@ class HtmlExporter:
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return f"函数图像:{diag.message}{loc}"
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def _render_function_plot(self, node: DocumentNode, warnings: list[str]) -> str:
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# 解析 fenced 源码:有合法 plot 且无 error → 内嵌静态 SVG;否则回退占位并转诊断
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parsed = parse_source(node.text)
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for diag in parsed.diagnostics:
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warnings.append(self._format_plot_diagnostic(diag))
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if parsed.plot is None:
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return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
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# 解析与渲染共同纳入局部异常回退:单个图像失败只回退占位 + warning,
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# 绝不阻断整篇导出(含复杂表达式触发的 RecursionError 等异常)。
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try:
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parsed = parse_source(node.text)
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for diag in parsed.diagnostics:
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warnings.append(self._format_plot_diagnostic(diag))
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if parsed.plot is None:
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return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
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rendered = render_svg(parsed.plot)
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except Exception as exc: # 渲染异常回退占位,绝不阻断整篇导出
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warnings.append(f"函数图像:渲染失败,已回退占位({exc})")
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except Exception as exc:
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warnings.append(f"函数图像:解析或渲染失败,已回退占位({exc})")
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return f'<pre class="function-plot">{html.escape(node.text)}</pre>'
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warnings.extend(rendered.warnings)
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return f'<figure class="function-plot">{rendered.content}</figure>'
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