Fix #401 Upgrade canvas proformence

[Anchel123]

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Name	Status	Preview	Comments	Updated (UTC)
code-graph	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Mar 10, 2025 8:50am

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[gemini-code-assist]

Hello @Anchel123, 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!

Summary of Changes

This pull request addresses a performance issue related to the canvas rendering of graph links, specifically the labels on those links. The primary change involves optimizing the calculation and rendering of link labels within the graphView.tsx component. It also introduces a Label interface and corresponding changes in model.ts to store and reuse text width and height measurements for labels, avoiding redundant calculations. The changes aim to improve the rendering speed and overall performance of the graph view.

Highlights

• Performance Improvement: The main goal is to enhance the performance of the graph rendering, particularly the link labels, by caching label dimensions.
• Link Label Rendering Optimization: The pull request optimizes the way link labels are positioned, rotated, and rendered on the canvas, including adding a background for better readability.
• Code Refactoring: The code related to label positioning and rendering has been refactored for clarity and efficiency.
• Model Enhancement: A new Label interface has been added to model.ts to store label-related data (width, height) for performance reasons.

Changelog

Click here to see the changelog

• app/components/graphView.tsx
  • Refactored link label rendering logic to improve performance.
  • Calculates text position and rotation more efficiently.
  • Adds a white background to link labels for better readability.
  • Caches text width and height to avoid redundant calculations.
  • Introduces angle variable to avoid redundant calculations
• app/components/model.ts
  • Introduces a Label interface to store label dimensions.
  • Adds labels and labelsMap properties to the Graph class to manage label data.
  • Modifies the Graph.empty() method to initialize the new label-related properties.
  • Updates the Graph.create() method to populate the labelsMap with label data.

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[gemini-code-assist]

Code Review

The pull request introduces several improvements to the code graph application, including performance enhancements, bug fixes, and new features. The changes are generally well-structured and easy to follow. However, there are a few areas that could be improved to enhance code quality, maintainability, and test reliability.

Summary of Findings

• Refactor handleExpand function: The handleExpand function in code-graph.tsx could be refactored to improve readability and maintainability by extracting the common logic for expanding and collapsing nodes into separate helper functions.
• Improve error handling in handleDownloadImage: The handleDownloadImage function in code-graph.tsx could benefit from more specific error handling to provide more informative error messages to the user.
• Type safety in DataPanel component: The DataPanel component's obj prop should be more strictly typed to avoid potential runtime errors when accessing properties specific to Node or Link objects.
• Replace delay with explicit waits in e2e tests: The e2e tests rely heavily on delay which is not a reliable way to wait for elements to be visible or stable. Replace these with explicit waits using waitForElementToBeVisible or waitForStableText.

Merge Readiness

The pull request is not yet ready for merging. The e2e tests need to be updated to use explicit waits instead of delay. The handleExpand function in code-graph.tsx could be refactored to improve readability and maintainability. The handleDownloadImage function in code-graph.tsx could benefit from more specific error handling to provide more informative error messages to the user. The DataPanel component's obj prop should be more strictly typed to avoid potential runtime errors when accessing properties specific to Node or Link objects. I am unable to approve this pull request, and users should have others review and approve this code before merging.