Function doCreateOrUpdateAttachedTx

src/chart/custom/CustomView.ts:1183–1247

(
    el: Element,
    dataIndex: number,
    elOption: CustomElementOption,
    seriesModel: CustomSeriesModel,
    isInit: boolean,
    attachedTxInfo: AttachedTxInfo
)

}

function doCreateOrUpdateAttachedTx(
    el: Element,
    dataIndex: number,
    elOption: CustomElementOption,
    seriesModel: CustomSeriesModel,
    isInit: boolean,
    attachedTxInfo: AttachedTxInfo
): void {
    // Group does not support textContent temporarily until necessary.
    if (el.isGroup || el.type === 'compoundPath') {
        return;
    }

    // Normal must be called before emphasis, for `isLegacy` detection.
    processTxInfo(elOption, null, attachedTxInfo);
    processTxInfo(elOption, EMPHASIS, attachedTxInfo);

    // If `elOption.textConfig` or `elOption.textContent` is null/undefined, it does not make sense.
    // So for simplicity, if "elOption hasOwnProperty of them but be null/undefined", we do not
    // trade them as set to null to el.
    // Especially:
    // `elOption.textContent: false` means remove textContent.
    // `elOption.textContent.emphasis.style: false` means remove the style from emphasis state.
    let txConOptNormal = attachedTxInfo.normal.conOpt as CustomElementOption | false;
    const txConOptEmphasis = attachedTxInfo.emphasis.conOpt as CustomElementOptionOnState;
    const txConOptBlur = attachedTxInfo.blur.conOpt as CustomElementOptionOnState;
    const txConOptSelect = attachedTxInfo.select.conOpt as CustomElementOptionOnState;

    if (txConOptNormal != null || txConOptEmphasis != null || txConOptSelect != null || txConOptBlur != null) {
        let textContent = el.getTextContent();
        if (txConOptNormal === false) {
            textContent && el.removeTextContent();
        }
        else {
            txConOptNormal = attachedTxInfo.normal.conOpt = txConOptNormal || {type: 'text'};
            if (!textContent) {
                textContent = createEl(txConOptNormal) as graphicUtil.Text;
                el.setTextContent(textContent);
            }
            else {
                // If in some case the performance issue arised, consider
                // do not clearState but update cached normal state directly.
                textContent.clearStates();
            }

            updateElNormal(null, textContent, dataIndex, txConOptNormal, null, seriesModel, isInit);
            const txConStlOptNormal = txConOptNormal && (txConOptNormal as CustomDisplayableOption).style;
            for (let i = 0; i < STATES.length; i++) {
                const stateName = STATES[i];
                if (stateName !== NORMAL) {
                    const txConOptOtherState = attachedTxInfo[stateName].conOpt as CustomElementOptionOnState;
                    updateElOnState(
                        stateName,
                        textContent,
                        txConOptOtherState,
                        retrieveStyleOptionOnState(txConOptNormal, txConOptOtherState, stateName),
                        null
                    );