Function getIsInPiecewiseRange

src/chart/heatmap/HeatmapView.ts:42–80

(
    dataExtent: number[],
    pieceList: ReturnType<PiecewiseModel['getPieceList']>,
    selected: Dictionary<boolean>
)

function getIsInPiecewiseRange(
    dataExtent: number[],
    pieceList: ReturnType<PiecewiseModel['getPieceList']>,
    selected: Dictionary<boolean>
) {
    const dataSpan = dataExtent[1] - dataExtent[0];
    pieceList = zrUtil.map(pieceList, function (piece) {
        return {
            interval: [
                (piece.interval[0] - dataExtent[0]) / dataSpan,
                (piece.interval[1] - dataExtent[0]) / dataSpan
            ]
        };
    });
    const len = pieceList.length;
    let lastIndex = 0;

    return function (val: number) {
        let i;
        // Try to find in the location of the last found
        for (i = lastIndex; i < len; i++) {
            const interval = pieceList[i].interval;
            if (interval[0] <= val && val <= interval[1]) {
                lastIndex = i;
                break;
            }
        }
        if (i === len) { // Not found, back interation
            for (i = lastIndex - 1; i >= 0; i--) {
                const interval = pieceList[i].interval;
                if (interval[0] <= val && val <= interval[1]) {
                    lastIndex = i;
                    break;
                }
            }
        }
        return i >= 0 && i < len && selected[i];
    };
}

function getIsInContinuousRange(dataExtent: number[], range: number[]) {
    const dataSpan = dataExtent[1] - dataExtent[0];