function areRectsOnOneLine()

in src/component/selection/expandRangeToStartOfLine.js [55:87]

• 24 lines of code
• 6 McCabe index (conditional complexity)

function areRectsOnOneLine(
  rects: Array<ClientRect>,
  lineHeight: number,
): boolean {
  let minTop = Infinity;
  let minBottom = Infinity;
  let maxTop = -Infinity;
  let maxBottom = -Infinity;

  for (let ii = 0; ii < rects.length; ii++) {
    const rect = rects[ii];
    if (rect.width === 0 || rect.width === 1) {
      // When a range starts or ends a soft wrap, many browsers (Chrome, IE,
      // Safari) include an empty rect on the previous or next line. When the
      // text lies in a container whose position is not integral (e.g., from
      // margin: auto), Safari makes these empty rects have width 1 (instead of
      // 0). Having one-pixel-wide characters seems unlikely (and most browsers
      // report widths in subpixel precision anyway) so it's relatively safe to
      // skip over them.
      continue;
    }
    minTop = Math.min(minTop, rect.top);
    minBottom = Math.min(minBottom, rect.bottom);
    maxTop = Math.max(maxTop, rect.top);
    maxBottom = Math.max(maxBottom, rect.bottom);
  }

  return (
    maxTop <= minBottom &&
    maxTop - minTop < lineHeight &&
    maxBottom - minBottom < lineHeight
  );
}