Function saveTooltipAxisInfo

src/component/axisPointer/modelHelper.ts:169–229

(
            fromTooltip: boolean | 'cross',
            triggerTooltip: boolean,
            axis: Axis
        )

        // fromTooltip: true | false | 'cross'
        // triggerTooltip: true | false | null
        function saveTooltipAxisInfo(
            fromTooltip: boolean | 'cross',
            triggerTooltip: boolean,
            axis: Axis
        ) {
            let axisPointerModel = axis.model.getModel(
                'axisPointer', globalAxisPointerModel
            ) as Model<CommonAxisPointerOption>;

            const axisPointerShow = axisPointerModel.get('show');
            if (!axisPointerShow || (
                axisPointerShow === 'auto'
                && !fromTooltip
                && !isHandleTrigger(axisPointerModel)
            )) {
                return;
            }

            if (triggerTooltip == null) {
                triggerTooltip = axisPointerModel.get('triggerTooltip');
            }

            axisPointerModel = fromTooltip
                ? makeAxisPointerModel(
                    axis, baseTooltipModel, globalAxisPointerModel, ecModel,
                    fromTooltip, triggerTooltip
                )
                : axisPointerModel;

            const snap = axisPointerModel.get('snap');
            const triggerEmphasis = axisPointerModel.get('triggerEmphasis');
            const axisKey = makeKey(axis.model);
            const involveSeries = triggerTooltip || snap || axis.type === 'category';

            // If result.axesInfo[key] exist, override it (tooltip has higher priority).
            const axisInfo: AxisInfo = result.axesInfo[axisKey] = {
                key: axisKey,
                axis: axis,
                coordSys: coordSys,
                axisPointerModel: axisPointerModel,
                triggerTooltip: triggerTooltip,
                triggerEmphasis: triggerEmphasis,
                involveSeries: involveSeries,
                snap: snap,
                useHandle: isHandleTrigger(axisPointerModel),
                seriesModels: [],

                linkGroup: null
            };
            axesInfoInCoordSys[axisKey] = axisInfo;
            result.seriesInvolved = result.seriesInvolved || involveSeries;

            const groupIndex = getLinkGroupIndex(linksOption, axis);
            if (groupIndex != null) {
                const linkGroup: LinkGroup = linkGroups[groupIndex]
                    || (linkGroups[groupIndex] = {axesInfo: {}} as LinkGroup);
                linkGroup.axesInfo[axisKey] = axisInfo;
                linkGroup.mapper = linksOption[groupIndex].mapper;