function avoidOverlap()

in src/chart/pie/labelLayout.ts [147:255]
103 lines of code
22 McCabe index (conditional complexity)

function avoidOverlap(
    labelLayoutList: LabelLayout[],
    cx: number,
    cy: number,
    r: number,
    viewWidth: number,
    viewHeight: number,
    viewLeft: number,
    viewTop: number
) {
    const leftList = [];
    const rightList = [];
    let leftmostX = Number.MAX_VALUE;
    let rightmostX = -Number.MAX_VALUE;
    for (let i = 0; i < labelLayoutList.length; i++) {
        const label = labelLayoutList[i].label;
        if (isPositionCenter(labelLayoutList[i])) {
            continue;
        }
        if (label.x < cx) {
            leftmostX = Math.min(leftmostX, label.x);
            leftList.push(labelLayoutList[i]);
        }
        else {
            rightmostX = Math.max(rightmostX, label.x);
            rightList.push(labelLayoutList[i]);
        }
    }

    for (let i = 0; i < labelLayoutList.length; i++) {
        const layout = labelLayoutList[i];
        if (!isPositionCenter(layout) && layout.linePoints) {
            if (layout.labelStyleWidth != null) {
                continue;
            }

            const label = layout.label;
            const linePoints = layout.linePoints;

            let targetTextWidth;
            if (layout.labelAlignTo === 'edge') {
                if (label.x < cx) {
                    targetTextWidth = linePoints[2][0] - layout.labelDistance
                            - viewLeft - layout.edgeDistance;
                }
                else {
                    targetTextWidth = viewLeft + viewWidth - layout.edgeDistance
                            - linePoints[2][0] - layout.labelDistance;
                }
            }
            else if (layout.labelAlignTo === 'labelLine') {
                if (label.x < cx) {
                    targetTextWidth = leftmostX - viewLeft - layout.bleedMargin;
                }
                else {
                    targetTextWidth = viewLeft + viewWidth - rightmostX - layout.bleedMargin;
                }
            }
            else {
                if (label.x < cx) {
                    targetTextWidth = label.x - viewLeft - layout.bleedMargin;
                }
                else {
                    targetTextWidth = viewLeft + viewWidth - label.x - layout.bleedMargin;
                }
            }
            layout.targetTextWidth = targetTextWidth;

            constrainTextWidth(layout, targetTextWidth);
        }
    }

    adjustSingleSide(rightList, cx, cy, r, 1, viewWidth, viewHeight, viewLeft, viewTop, rightmostX);
    adjustSingleSide(leftList, cx, cy, r, -1, viewWidth, viewHeight, viewLeft, viewTop, leftmostX);

    for (let i = 0; i < labelLayoutList.length; i++) {
        const layout = labelLayoutList[i];
        if (!isPositionCenter(layout) && layout.linePoints) {
            const label = layout.label;
            const linePoints = layout.linePoints;
            const isAlignToEdge = layout.labelAlignTo === 'edge';
            const padding = label.style.padding as number[];
            const paddingH = padding ? padding[1] + padding[3] : 0;
            // textRect.width already contains paddingH if bgColor is set
            const extraPaddingH = label.style.backgroundColor ? 0 : paddingH;
            const realTextWidth = layout.rect.width + extraPaddingH;
            const dist = linePoints[1][0] - linePoints[2][0];
            if (isAlignToEdge) {
                if (label.x < cx) {
                    linePoints[2][0] = viewLeft + layout.edgeDistance + realTextWidth + layout.labelDistance;
                }
                else {
                    linePoints[2][0] = viewLeft + viewWidth - layout.edgeDistance
                            - realTextWidth - layout.labelDistance;
                }
            }
            else {
                if (label.x < cx) {
                    linePoints[2][0] = label.x + layout.labelDistance;
                }
                else {
                    linePoints[2][0] = label.x - layout.labelDistance;
                }
                linePoints[1][0] = linePoints[2][0] + dist;
            }
            linePoints[1][1] = linePoints[2][1] = label.y;
        }
    }
}