Function calculateTextPosition

libs/echarts/echarts.simple.js:7722–7817

* Follow same interface to `Displayable.prototype.calculateTextPosition`. * @public * @param {Obejct} [out] Prepared out object. If not input, auto created in the method. * @param {module:zrender/graphic/Style} style where `textPosition` and `textDistance` are visited. * @param {Object} rect {x,

(out, style, rect)

 * @return {Object} The input `out`. Set: {x, y, textAlign, textVerticalAlign}
 */
function calculateTextPosition(out, style, rect) {
    var textPosition = style.textPosition;
    var distance = style.textDistance;

    var x = rect.x;
    var y = rect.y;
    distance = distance || 0;

    var height = rect.height;
    var width = rect.width;
    var halfHeight = height / 2;

    var textAlign = 'left';
    var textVerticalAlign = 'top';

    switch (textPosition) {
        case 'left':
            x -= distance;
            y += halfHeight;
            textAlign = 'right';
            textVerticalAlign = 'middle';
            break;
        case 'right':
            x += distance + width;
            y += halfHeight;
            textVerticalAlign = 'middle';
            break;
        case 'top':
            x += width / 2;
            y -= distance;
            textAlign = 'center';
            textVerticalAlign = 'bottom';
            break;
        case 'bottom':
            x += width / 2;
            y += height + distance;
            textAlign = 'center';
            break;
        case 'inside':
            x += width / 2;
            y += halfHeight;
            textAlign = 'center';
            textVerticalAlign = 'middle';
            break;
        case 'insideLeft':
            x += distance;
            y += halfHeight;
            textVerticalAlign = 'middle';
            break;
        case 'insideRight':
            x += width - distance;
            y += halfHeight;
            textAlign = 'right';
            textVerticalAlign = 'middle';
            break;
        case 'insideTop':
            x += width / 2;
            y += distance;