Function getTooltipMarker

libs/echarts/echarts.simple.js:19427–19458

* @param {Object|string} [opt] If string, means color. * @param {string} [opt.color] * @param {string} [opt.extraCssText] * @param {string} [opt.type='item'] 'item' or 'subItem' * @param {string} [opt.renderMode='html'] render mode of tooltip, 'html' or 'richText' * @param {string} [opt.markerI

(opt, extraCssText)

 * @return {string}
 */
function getTooltipMarker(opt, extraCssText) {
    opt = isString(opt) ? {color: opt, extraCssText: extraCssText} : (opt || {});
    var color = opt.color;
    var type = opt.type;
    var extraCssText = opt.extraCssText;
    var renderMode = opt.renderMode || 'html';
    var markerId = opt.markerId || 'X';

    if (!color) {
        return '';
    }

    if (renderMode === 'html') {
        return type === 'subItem'
        ? '<span style="display:inline-block;vertical-align:middle;margin-right:8px;margin-left:3px;'
            + 'border-radius:4px;width:4px;height:4px;background-color:'
            + encodeHTML(color) + ';' + (extraCssText || '') + '"></span>'
        : '<span style="display:inline-block;margin-right:5px;'
            + 'border-radius:10px;width:10px;height:10px;background-color:'
            + encodeHTML(color) + ';' + (extraCssText || '') + '"></span>';
    }
    else {
        // Space for rich element marker
        return {
            renderMode: renderMode,
            content: '{marker' + markerId + '|}  ',
            style: {
                color: color
            }
        };
    }
}

function pad(str, len) {
    str += '';