Function dataTransform

src/component/marker/markerHelper.ts:105–174

(
    seriesModel: SeriesModel,
    item: MarkerPositionOption
)

 * 2. Convert `item.xAxis`, `item.yAxis` to `item.coord` array
 */
export function dataTransform(
    seriesModel: SeriesModel,
    item: MarkerPositionOption
) {
    if (!item) {
        return;
    }

    const data = seriesModel.getData();
    const coordSys = seriesModel.coordinateSystem;
    const dims = coordSys && coordSys.dimensions;

    // 1. If not specify the position with pixel directly
    // 2. If `coord` is not a data array. Which uses `xAxis`,
    // `yAxis` to specify the coord on each dimension

    // parseFloat first because item.x and item.y can be percent string like '20%'
    if (!hasXAndY(item) && !isArray(item.coord) && isArray(dims)) {
        const axisInfo = getAxisInfo(item, data, coordSys, seriesModel);

        // Clone the option
        // Transform the properties xAxis, yAxis, radiusAxis, angleAxis, geoCoord to value
        item = clone(item);

        if (item.type
            && markerTypeCalculator[item.type]
            && axisInfo.baseAxis && axisInfo.valueAxis
        ) {
            const otherCoordIndex = indexOf(dims, axisInfo.baseAxis.dim);
            const targetCoordIndex = indexOf(dims, axisInfo.valueAxis.dim);

            const coordInfo = markerTypeCalculator[item.type](
                data, axisInfo.valueAxis.dim, axisInfo.baseDataDim, axisInfo.valueDataDim,
                otherCoordIndex, targetCoordIndex
            );
            item.coord = coordInfo[0];
            // Force to use the value of calculated value.
            // let item use the value without stack.
            item.value = coordInfo[1];
        }
        else {
            // FIXME Only has one of xAxis and yAxis.
            item.coord = [
                item.xAxis != null ? item.xAxis : item.radiusAxis,
                item.yAxis != null ? item.yAxis : item.angleAxis
            ];
        }
    }
    // x y is provided
    if (item.coord == null || !isArray(dims)) {
        item.coord = [];
        const baseAxis = seriesModel.getBaseAxis();
        if (baseAxis && item.type && markerTypeCalculator[item.type]) {
            const otherAxis = coordSys.getOtherAxis(baseAxis);
            if (otherAxis) {
                item.value = numCalculate(data, data.mapDimension(otherAxis.dim), item.type);
            }
        }