Function endTextLayout

src/component/axis/AxisBuilder.ts:1022–1055

(
    rotation: number, textPosition: AxisBaseOptionCommon['nameLocation'], textRotate: number, extent: number[]
)

};

function endTextLayout(
    rotation: number, textPosition: AxisBaseOptionCommon['nameLocation'], textRotate: number, extent: number[]
) {
    const rotationDiff = remRadian(textRotate - rotation);
    let textAlign: ZRTextAlign;
    let textVerticalAlign: ZRTextVerticalAlign;
    const inverse = extent[0] > extent[1];
    const onLeft = (textPosition === 'start' && !inverse)
        || (textPosition !== 'start' && inverse);

    if (isRadianAroundZero(rotationDiff - PI / 2)) {
        textVerticalAlign = onLeft ? 'bottom' : 'top';
        textAlign = 'center';
    }
    else if (isRadianAroundZero(rotationDiff - PI * 1.5)) {
        textVerticalAlign = onLeft ? 'top' : 'bottom';
        textAlign = 'center';
    }
    else {
        textVerticalAlign = 'middle';
        if (rotationDiff < PI * 1.5 && rotationDiff > PI / 2) {
            textAlign = onLeft ? 'left' : 'right';
        }
        else {
            textAlign = onLeft ? 'right' : 'left';
        }
    }

    return {
        rotation: rotationDiff,
        textAlign: textAlign,
        textVerticalAlign: textVerticalAlign
    };
}

/**
 * Assume `labelLayoutList` has no `label.ignore: true`.