Function resetLabelForRegion

src/component/helper/MapDraw.ts:679–763

(
    mapOrGeoModel: MapOrGeoModel,
    data: SeriesData | NullUndefined,
    el: Element,
    regionName: string,
    regionModel: RegionModel,
    // Exist only if `viewBuildCtx.data` exists.
    dataIdx: number,
    // If labelXY not provided, use `textConfig.position: 'inside'`
    labelXY: number[]
)

}

function resetLabelForRegion(
    mapOrGeoModel: MapOrGeoModel,
    data: SeriesData | NullUndefined,
    el: Element,
    regionName: string,
    regionModel: RegionModel,
    // Exist only if `viewBuildCtx.data` exists.
    dataIdx: number,
    // If labelXY not provided, use `textConfig.position: 'inside'`
    labelXY: number[]
): void {
    const isDataNaN = data && isNaN(data.get(data.mapDimension('value'), dataIdx) as number);
    const itemLayout = data && data.getItemLayout(dataIdx);

    // In the following cases label will be drawn
    // 1. In map series and data value is NaN
    // 2. In geo component
    // 3. Region has no series legendIcon, which will be add a showLabel flag in mapSymbolLayout
    if (
        ((isGeoModel(mapOrGeoModel) || isDataNaN))
        || (itemLayout && itemLayout.showLabel)
    ) {

        const query = !isGeoModel(mapOrGeoModel) ? dataIdx : regionName;
        let labelFetcher;

        // Consider dataIdx not found.
        if (!data || dataIdx >= 0) {
            labelFetcher = mapOrGeoModel;
        }

        const specifiedTextOpt: Partial<Record<DisplayState, TextStyleProps>> = labelXY ? {
            normal: {
                align: 'center',
                verticalAlign: 'middle'
            }
        } : null;

        // Caveat: must be called after `setDefaultStateProxy(el);` called.
        // because textContent will be assign with `el.stateProxy` inside.
        setLabelStyle<typeof query>(
            el,
            getLabelStatesModels(regionModel),
            {
                labelFetcher,
                labelDataIndex: query,
                defaultText: regionName
            },
            specifiedTextOpt
        );

        const textEl = el.getTextContent();
        if (textEl) {
            mapLabelRaw(textEl).ignore = textEl.ignore;

            if (el.textConfig && labelXY) {
                // Compute a relative offset based on the el bounding rect.
                const rect = el.getBoundingRect().clone();