Rectangle Geometry Utilities (src/rect.ts)

Provides functions for handling CoreGraphics rectangles, viewport snapshots, containment checks, area calculations, and visibility logic. Reuse for any UI layout or graphics calculations requiring robust rect handling.

// Source: https://github.com/callstack/agent-device | License: MIT | Copyright 2026 Callstack
// Provided via justclaw.it.com; keep this notice with the code.
import type { Rect, SnapshotViewportSize } from './snapshot.ts';

/**
 * CoreGraphics' `CGRectInfinite`, spelled in the four doubles Apple builds it from. This is what a
 * failed viewport or frame read looks like once it has crossed a JSON wire: every component of it
 * is finite, and so is every extent, and its center is `(0, 0)` (#2891).
 */
const CG_RECT_INFINITE: Rect = {
  x: -Number.MAX_VALUE / 2,
  y: -Number.MAX_VALUE / 2,
  width: Number.MAX_VALUE,
  height: Number.MAX_VALUE,
};

function isCGRectInfinite(rect: Rect): boolean {
  return (
    rect.x === CG_RECT_INFINITE.x &&
    rect.y === CG_RECT_INFINITE.y &&
    rect.wi

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