Class EdgeFactory

components/dash-table/src/dash-table/components/EdgeFactory.tsx:42–408

type EdgesMatricesOp = EdgesMatrices | undefined;

export default class EdgeFactory {
    private readonly dataStyles = derivedRelevantCellStyles();
    private readonly filterStyles = derivedRelevantFilterStyles();
    private readonly headerStyles = derivedRelevantHeaderStyles();

    private readonly getPartialDataEdges = derivedPartialDataEdges();
    private readonly getDataEdges = derivedDataEdges();
    private readonly getDataOpEdges = derivedDataOpEdges();
    private readonly getFilterEdges = derivedFilterEdges();
    private readonly getFilterOpEdges = derivedFilterOpEdges();
    private readonly getHeaderEdges = derivedHeaderEdges();
    private readonly getHeaderOpEdges = derivedHeaderOpEdges();

    private static clone(target: EdgesMatricesOp) {
        return target && target.clone();
    }

    private static hasPrecedence(
        target: number,
        other: number,
        cutoff: number
    ): boolean {
        return (other <= cutoff || target === Infinity) && other <= target;
    }

    private hOverride(
        previous: EdgesMatricesOp,
        target: EdgesMatricesOp,
        cutoffWeight: number
    ) {
        if (!previous || !target) {
            return;
        }

        const hPrevious = previous.getMatrices().horizontal;
        const hTarget = target.getMatrices().horizontal;

        const iPrevious = hPrevious.rows - 1;
        const iTarget = 0;

        for (let j = 0; j < hPrevious.columns; j++) {
            if (
                EdgeFactory.hasPrecedence(
                    hPrevious.getWeight(iPrevious, j),
                    hTarget.getWeight(iTarget, j),
                    cutoffWeight
                )
            ) {
                hTarget.setEdge(
                    iTarget,
                    j,
                    hPrevious.getEdge(iPrevious, j),
                    Infinity,
                    true
                );
            }
            hPrevious.setEdge(iPrevious, j, 'none', -Infinity, true);
        }