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📝 WalkthroughWalkthroughThis PR adds Mermaid diagram rendering capabilities to the UI by introducing a new reusable Changes
Sequence Diagram(s)sequenceDiagram
participant App
participant MermaidDiagram
participant Mermaid as Mermaid Library
App->>MermaidDiagram: Render with code & theme
activate MermaidDiagram
MermaidDiagram->>MermaidDiagram: Generate unique renderId
MermaidDiagram->>Mermaid: Initialize with config
MermaidDiagram->>Mermaid: Call mermaid.render(code)
Mermaid-->>MermaidDiagram: Return SVG
MermaidDiagram->>MermaidDiagram: Inject SVG into container
MermaidDiagram->>MermaidDiagram: Handle errors (fallback)
deactivate MermaidDiagram
MermaidDiagram-->>App: Rendered diagram display
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Poem
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🧬 Code graph analysis (2)src/ui/src/components/mermaid-diagram.tsx (1)
src/ui/src/App.tsx (2)
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🔇 Additional comments (8)
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Summary of ChangesHello @venikman, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request significantly enhances the UI by integrating interactive protocol diagrams and a comprehensive comparison matrix. By leveraging the Mermaid library, it provides clear visual representations of different protocol scenarios like Streamdown, A2UI, MCP, and json-render, alongside a structured table detailing their key features. This addition aims to improve understanding and reference for these complex systems directly within the application. Highlights
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Pull request overview
This PR adds Mermaid diagram rendering capabilities to the UI to visualize protocol interaction flows for a "protocol bakeoff" comparison (Streamdown, A2UI, MCP, and json-render). It introduces a new React component for rendering Mermaid diagrams, adds protocol diagram definitions and a comparison matrix, and displays them in a new section of the UI.
Changes:
- Added
mermaidlibrary (v11.12.2) as a dependency with its extensive transitive dependencies - Created a reusable
MermaidDiagramReact component with theme support and error handling - Added protocol diagram definitions and comparison matrix data in a new content file
Reviewed changes
Copilot reviewed 5 out of 6 changed files in this pull request and generated 5 comments.
Show a summary per file
| File | Description |
|---|---|
| src/ui/package.json | Added mermaid dependency and reordered shiki dependency |
| src/ui/package-lock.json | Extensive dependency tree additions for mermaid and its 60+ transitive dependencies |
| src/ui/src/components/mermaid-diagram.tsx | New React component for rendering Mermaid diagrams with theme support |
| src/ui/src/content/protocol-bakeoff.ts | New file containing protocol diagram definitions and comparison matrix data |
| src/ui/src/App.tsx | Added new "Protocol Bakeoff" section with diagrams and comparison table |
| src/ui/src/styles.css | Added CSS rule for responsive SVG sizing in Mermaid diagrams |
Files not reviewed (1)
- src/ui/package-lock.json: Language not supported
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| mermaid.initialize({ | ||
| ...mermaidConfig, | ||
| theme: theme === "dark" ? "dark" : "neutral", | ||
| }); |
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Calling mermaid.initialize() on every render when the theme changes can cause performance issues. Consider moving the initialization outside the useEffect or memoizing it to avoid unnecessary re-initializations of the Mermaid library, especially when multiple diagrams are rendered on the same page.
| const renderId = useMemo( | ||
| () => `mermaid-${Math.random().toString(36).slice(2, 10)}`, | ||
| [], | ||
| ); |
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Using Math.random() for generating IDs can potentially cause collisions, especially with multiple diagrams. Consider using a more robust approach like React's useId() hook (available in React 18+) or a library like nanoid, which is already in the project dependencies.
| try { | ||
| const { svg, bindFunctions } = await mermaid.render(renderId, code); | ||
| if (cancelled || !containerRef.current) return; | ||
| containerRef.current.innerHTML = svg; |
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Setting innerHTML with SVG content from mermaid.render() could pose XSS risks if the diagram code contains malicious content. While Mermaid's 'strict' securityLevel provides some protection, consider additional sanitization or using DOMPurify (which is already a transitive dependency of mermaid) explicitly to ensure the SVG is safe before injecting it into the DOM.
| export type ProtocolDiagram = { | ||
| id: string; | ||
| title: string; | ||
| subtitle: string; | ||
| code: string; | ||
| }; |
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The ProtocolDiagram type and protocolMatrix structure lack documentation. Consider adding JSDoc comments to explain the purpose of these types and the expected format of the 'code' field (Mermaid syntax), especially since this is a new content module.
| "media-chrome": "^4.17.2", | ||
| "mermaid": "^11.12.2", | ||
| "motion": "^12.26.2", |
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The shiki dependency was reordered from line 38 to line 39 in the package.json. While this doesn't affect functionality, the change appears unintentional as it's not mentioned in the PR description. Dependencies should maintain a consistent order (alphabetical is preferred) to avoid unnecessary diff noise in version control.
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Code Review
This pull request introduces Mermaid diagrams and a comparison matrix to the UI for the protocol bakeoff. The implementation is solid, with a new MermaidDiagram component to handle rendering. I've provided a few suggestions to improve the new component's robustness and maintainability, such as using React's useId hook for generating unique IDs, adding error logging for easier debugging, and removing hardcoded styles from the diagram definitions to better support theming.
| const renderId = useMemo( | ||
| () => `mermaid-${Math.random().toString(36).slice(2, 10)}`, | ||
| [], | ||
| ); |
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For generating unique IDs in React, it's better to use the useId hook, which is available in React 19 and is designed for this purpose. It avoids potential issues with server-side rendering and hydration that can occur with Math.random(). It also makes the intent of the code clearer.
To make this change, you'll also need to update the import statement on line 2 from import { useEffect, useMemo, useRef } from "react"; to import { useEffect, useId, useRef } from "react";.
const renderId = useId();
| } catch (_error) { | ||
| if (!cancelled && containerRef.current) { | ||
| containerRef.current.textContent = "Diagram failed to render."; | ||
| } | ||
| } |
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The error from mermaid.render is currently being ignored. It would be beneficial for debugging to log this error to the console. This will help diagnose issues with diagram rendering in the future.
} catch (error) {
console.error('Failed to render Mermaid diagram:', error);
if (!cancelled && containerRef.current) {
containerRef.current.textContent = 'Diagram failed to render.';
}
}
| style A fill:#fef3c7,stroke:#f59e0b | ||
| style B fill:#dbeafe,stroke:#3b82f6 | ||
| style C fill:#dcfce7,stroke:#22c55e | ||
| style D fill:#f3e8ff,stroke:#a855f7`, |
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These hardcoded style directives will override the Mermaid theme set in the MermaidDiagram component. This can lead to poor contrast, especially in light mode, and makes the diagrams less maintainable if the application's theme colors change. It's better to remove these and let the selected Mermaid theme (dark or neutral) handle the styling for consistency.
|
Superseded by #18 |
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