Function avoidOverlap

src/chart/pie/labelLayout.ts:149–257

(
    labelLayoutList: LabelLayout[],
    cx: number,
    cy: number,
    r: number,
    viewWidth: number,
    viewHeight: number,
    viewLeft: number,
    viewTop: number
)

}

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;
                }
            }