function pathArc()

in Hands-on lab/lab-files/starter-project/NorthwindMVC/wwwroot/lib/Chart.js/chart.js [8727:8777]
51 lines of code
10 McCabe index (conditional complexity)

function pathArc(ctx, element, offset, spacing, end) {
  const {x, y, startAngle: start, pixelMargin, innerRadius: innerR} = element;
  const outerRadius = Math.max(element.outerRadius + spacing + offset - pixelMargin, 0);
  const innerRadius = innerR > 0 ? innerR + spacing + offset + pixelMargin : 0;
  let spacingOffset = 0;
  const alpha = end - start;
  if (spacing) {
    const noSpacingInnerRadius = innerR > 0 ? innerR - spacing : 0;
    const noSpacingOuterRadius = outerRadius > 0 ? outerRadius - spacing : 0;
    const avNogSpacingRadius = (noSpacingInnerRadius + noSpacingOuterRadius) / 2;
    const adjustedAngle = avNogSpacingRadius !== 0 ? (alpha * avNogSpacingRadius) / (avNogSpacingRadius + spacing) : alpha;
    spacingOffset = (alpha - adjustedAngle) / 2;
  }
  const beta = Math.max(0.001, alpha * outerRadius - offset / PI) / outerRadius;
  const angleOffset = (alpha - beta) / 2;
  const startAngle = start + angleOffset + spacingOffset;
  const endAngle = end - angleOffset - spacingOffset;
  const {outerStart, outerEnd, innerStart, innerEnd} = parseBorderRadius$1(element, innerRadius, outerRadius, endAngle - startAngle);
  const outerStartAdjustedRadius = outerRadius - outerStart;
  const outerEndAdjustedRadius = outerRadius - outerEnd;
  const outerStartAdjustedAngle = startAngle + outerStart / outerStartAdjustedRadius;
  const outerEndAdjustedAngle = endAngle - outerEnd / outerEndAdjustedRadius;
  const innerStartAdjustedRadius = innerRadius + innerStart;
  const innerEndAdjustedRadius = innerRadius + innerEnd;
  const innerStartAdjustedAngle = startAngle + innerStart / innerStartAdjustedRadius;
  const innerEndAdjustedAngle = endAngle - innerEnd / innerEndAdjustedRadius;
  ctx.beginPath();
  ctx.arc(x, y, outerRadius, outerStartAdjustedAngle, outerEndAdjustedAngle);
  if (outerEnd > 0) {
    const pCenter = rThetaToXY(outerEndAdjustedRadius, outerEndAdjustedAngle, x, y);
    ctx.arc(pCenter.x, pCenter.y, outerEnd, outerEndAdjustedAngle, endAngle + HALF_PI);
  }
  const p4 = rThetaToXY(innerEndAdjustedRadius, endAngle, x, y);
  ctx.lineTo(p4.x, p4.y);
  if (innerEnd > 0) {
    const pCenter = rThetaToXY(innerEndAdjustedRadius, innerEndAdjustedAngle, x, y);
    ctx.arc(pCenter.x, pCenter.y, innerEnd, endAngle + HALF_PI, innerEndAdjustedAngle + Math.PI);
  }
  ctx.arc(x, y, innerRadius, endAngle - (innerEnd / innerRadius), startAngle + (innerStart / innerRadius), true);
  if (innerStart > 0) {
    const pCenter = rThetaToXY(innerStartAdjustedRadius, innerStartAdjustedAngle, x, y);
    ctx.arc(pCenter.x, pCenter.y, innerStart, innerStartAdjustedAngle + Math.PI, startAngle - HALF_PI);
  }
  const p8 = rThetaToXY(outerStartAdjustedRadius, startAngle, x, y);
  ctx.lineTo(p8.x, p8.y);
  if (outerStart > 0) {
    const pCenter = rThetaToXY(outerStartAdjustedRadius, outerStartAdjustedAngle, x, y);
    ctx.arc(pCenter.x, pCenter.y, outerStart, startAngle - HALF_PI, outerStartAdjustedAngle);
  }
  ctx.closePath();
}