Follow up of #88243, and the work is now happening in #86632 . We will build a solid implementation of Notebook Editor in the core this iteration based on the feature list we curated.

We will focus on the rendering of inputs/outputs and basic cell manipulation commands first and then explore how to support editor features in native notebook editor. At the same time we should move off workarounds in the prototype to ensure the PR in a mergeable state.

• Rendering
  • Outputs Mimetypes
    • 🏃 LaTeX (see details Notebook implementation in core (rendering / editor features) #90382 (comment)).
    • application/json.
    • image/*. We render PNG and JEPG in core but svg and gifs should be rendered in webview/iframe. (GIF support is a must as we don't support videos).
    • application/scripts.
  • Metadata
    • Cell metadata which controls the renderings of cells, like editable, execution_count
    • Output metadata, like whether the output should be rendered in an isolated context.
• Cell Manipulation
  • run cell, select below
  • run cell and insert below
  • insert cell above
  • insert cell below
  • cut selected cells
  • copy selected cells
  • paste
• Editor features
  • Save/SaveAs/AutoSave
  • Hot Exit
  • View States preserve and restore
  • Cursor movement across cells
• Engineering
  • List View
    • Dynamic height update
    • isRendering state
    • Optional List Item Height style
    • Willscroll event
    • Backing layer
  • Webview
    • body height/width 100%
    • wheel event handler
    • Event for initial layout (for dimensions info)
  • CodeEditorWidget
    • Remove DOM safely