Namespace Editor Rendering

The pipeline flows: VisualLineBuilder → CellVisualLine (composed of CellVisualLineElements such as TextRunElement, TabElement, NewlineGlyphElement, and FoldingMarkerElement).

Extension Points

• IVisualLineTransformer — mutates element attributes (syntax highlighting, fold markers)
• IBackgroundRenderer — paints cell rectangles (selection, current line, search hits)
• IOverlayRenderer — draws overlays above the text (multi-caret indicators)

Visual lines are cached with LRU eviction and selectively invalidated from document change events.