fix: Keep the data frame in view when you reduce its size.

[Artmann]

Fixes #218

Summary by CodeRabbit

• New Features
  • Enhanced visibility: The notebook cell automatically centers in the viewport after navigating to a different dataframe page or changing the page size.

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📝 Walkthrough

Walkthrough

The changes enhance the dataframe controller to auto-reveal notebook cells after execution. When goToPage and selectPageSize handlers re-execute cells, the code now creates a NotebookRange for each affected cell and calls editor.revealRange() with NotebookEditorRevealType.InCenterIfOutsideViewport, centering the cell in the viewport if it's currently out of view.

Pre-merge checks

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding auto-reveal behavior for notebook cells after dataframe operations (goToPage and selectPageSize) to keep them visible when size changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0%. Comparing base (e1ec0a7) to head (a7d830e).

Additional details and impacted files

@@     Coverage Diff     @@
##   main   #251   +/-   ##
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Actionable comments posted: 1

📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between e1ec0a7 and a7d830e.

📒 Files selected for processing (1)

• src/webviews/extension-side/dataframe/dataframeController.ts (3 hunks)

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📓 Path-based instructions (3)

**/*.{ts,tsx}

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**/*.{ts,tsx}: Use l10n.t() for all user-facing strings in TypeScript files
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Files:

• src/webviews/extension-side/dataframe/dataframeController.ts

**/*.ts

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Files:

• src/webviews/extension-side/dataframe/dataframeController.ts

src/**/*.{ts,tsx}

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src/**/*.{ts,tsx}: Don't add the Microsoft copyright header to new files
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Follow established patterns when importing new packages, using helper imports rather than direct imports (e.g., use import { generateUuid } from '../platform/common/uuid' instead of importing uuid directly)
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Files:

• src/webviews/extension-side/dataframe/dataframeController.ts

🧬 Code graph analysis (1)

src/webviews/extension-side/dataframe/dataframeController.ts (1)

src/test/mocks/vsc/extHostedTypes.ts (1)

• NotebookRange (2437-2467)

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🔇 Additional comments (1)

src/webviews/extension-side/dataframe/dataframeController.ts (1)

7-8: New VS Code notebook imports look appropriate

NotebookEditorRevealType and NotebookRange are used correctly below to reveal the executing cell; no issues from a typing or usage standpoint.

Please confirm your minimum VS Code engine version supports these APIs (they’re fairly recent in the notebook API surface).