Function buildTooltipModel

src/component/tooltip/TooltipView.ts:1071–1111

* From top to bottom. (the last one should be globalTooltipModel);

(
    modelCascade: TooltipModelOptionCascade[],
    globalTooltipModel: TooltipModel,
    defaultTooltipOption?: CommonTooltipOption<unknown>
)

 * From top to bottom. (the last one should be globalTooltipModel);
 */
function buildTooltipModel(
    modelCascade: TooltipModelOptionCascade[],
    globalTooltipModel: TooltipModel,
    defaultTooltipOption?: CommonTooltipOption<unknown>
): Model<TooltipOption & ComponentItemTooltipOption<unknown>> {
    // Last is always tooltip model.
    const ecModel = globalTooltipModel.ecModel;
    let resultModel: Model<TooltipOption & ComponentItemTooltipOption<unknown>>;

    if (defaultTooltipOption) {
        resultModel = new Model(defaultTooltipOption, ecModel, ecModel);
        resultModel = new Model(globalTooltipModel.option, resultModel, ecModel);
    }
    else {
        resultModel = globalTooltipModel as Model<TooltipOption & ComponentItemTooltipOption<unknown>>;
    }

    for (let i = modelCascade.length - 1; i >= 0; i--) {
        let tooltipOpt = modelCascade[i];
        if (tooltipOpt) {
            if (tooltipOpt instanceof Model) {
                tooltipOpt = (tooltipOpt as Model<TooltipableOption>).get('tooltip', true);
            }
            // In each data item tooltip can be simply write:
            // {
            //  value: 10,
            //  tooltip: 'Something you need to know'
            // }
            if (isString(tooltipOpt)) {
                tooltipOpt = {
                    formatter: tooltipOpt
                };
            }
            if (tooltipOpt) {
                resultModel = new Model(tooltipOpt, resultModel, ecModel);
            }
        }
    }

    return resultModel as Model<TooltipOption & ComponentItemTooltipOption<unknown>>;
}

function makeDispatchAction(payload: ShowTipPayload | HideTipPayload, api: ExtensionAPI) {
    return payload.dispatchAction || bind(api.dispatchAction, api);