Features from old diff editor:

• Inline View
• Support audio cues
• Diff Review (for screen readers)
• Arrow gutter buttons to undo changes in side-by-side view
• Restoring view state should work
• Correct alignment for wrapped lines
• Correct alignment when peek window is opened
• Staging changes should work
• First diff should reveal automatically when opening a diff editor

New features:

• Collapsing Unmodified Code
  • First prototype
  • Figure out button names
  • Polishing style
  • Word-wrap doesn't confuse alignment when there is collapsed unmodified code
  • Handle unchanged files gracefully
  • Open File Should Jump To Same Line
  • Typing In unfolded code shouldn't cause flickering
  • Persist View State
• Update diff synchronously with incoming edits
• Moved Code Detection
  • First prototype
  • Typing in a moved code block should work
  • Polish Move UX

Under discussion:

• Review Mode as third mode, additionally to Inline/Side-By-Side modes? (currently it is a modal)
• Should Inline-Mode be renamed to Unified-Mode? (IntelliJ and diff use this term)