function getTooltipSize()

in Hands-on lab/lab-files/starter-project/NorthwindMVC/wwwroot/lib/Chart.js/chart.js [10883:10935]
50 lines of code
6 McCabe index (conditional complexity)

function getTooltipSize(tooltip, options) {
  const ctx = tooltip._chart.ctx;
  const {body, footer, title} = tooltip;
  const {boxWidth, boxHeight} = options;
  const bodyFont = toFont(options.bodyFont);
  const titleFont = toFont(options.titleFont);
  const footerFont = toFont(options.footerFont);
  const titleLineCount = title.length;
  const footerLineCount = footer.length;
  const bodyLineItemCount = body.length;
  const padding = toPadding(options.padding);
  let height = padding.height;
  let width = 0;
  let combinedBodyLength = body.reduce((count, bodyItem) => count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);
  combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;
  if (titleLineCount) {
    height += titleLineCount * titleFont.lineHeight
			+ (titleLineCount - 1) * options.titleSpacing
			+ options.titleMarginBottom;
  }
  if (combinedBodyLength) {
    const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;
    height += bodyLineItemCount * bodyLineHeight
			+ (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight
			+ (combinedBodyLength - 1) * options.bodySpacing;
  }
  if (footerLineCount) {
    height += options.footerMarginTop
			+ footerLineCount * footerFont.lineHeight
			+ (footerLineCount - 1) * options.footerSpacing;
  }
  let widthPadding = 0;
  const maxLineWidth = function(line) {
    width = Math.max(width, ctx.measureText(line).width + widthPadding);
  };
  ctx.save();
  ctx.font = titleFont.string;
  each(tooltip.title, maxLineWidth);
  ctx.font = bodyFont.string;
  each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);
  widthPadding = options.displayColors ? (boxWidth + 2) : 0;
  each(body, (bodyItem) => {
    each(bodyItem.before, maxLineWidth);
    each(bodyItem.lines, maxLineWidth);
    each(bodyItem.after, maxLineWidth);
  });
  widthPadding = 0;
  ctx.font = footerFont.string;
  each(tooltip.footer, maxLineWidth);
  ctx.restore();
  width += padding.width;
  return {width, height};
}