JSVision

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Viewport and large documents ​

The viewport projects only visible rows and clamps horizontal and vertical scroll state after every resize. Document-size classification separately decides which expensive capabilities remain enabled, degraded, suspended, or confirmation-gated.

Focused usage ​

ts
import { classifyDocumentSize } from '@jsvision/code-editor';

const tier = classifyDocumentSize({ bytes: sourceBytes, lines: lineCount });

Responsive viewport and mouse ​

Mouse coordinates are translated through frame, gutter, scroll, visual-column, and folded-row geometry before they become document positions. Resize the containing Template1Dialog to test that projection under both compact and maximized layouts.

Resize or maximize the dialog, then run a real selection check with line numbers and viewport status visible.

Large-document tiers ​

Classification distinguishes normal operation from large and confirmation-gated documents. Degradation must be visible and reversible; it should not silently pretend syntax, folding, or language intelligence is current when work was suspended.

Switch from a full document to a bounded large fixture and inspect its explicit degradation notice.

Limits and practices ​

  • Build synthetic docs fixtures under a strict byte and line ceiling.
  • Measure viewport work independently from full-document analysis.
  • Preserve editing, navigation, selection, save, and close as essential capabilities.
  • Reclassify after content size changes and clear stale degraded results when returning to full mode.