function computeCameraVideoSize()

in modules/UI/videolayout/VideoContainer.js [89:145]
51 lines of code
15 McCabe index (conditional complexity)

function computeCameraVideoSize( // eslint-disable-line max-params
        videoWidth,
        videoHeight,
        videoSpaceWidth,
        videoSpaceHeight,
        videoLayoutFit) {
    if (videoWidth === 0 || videoHeight === 0 || videoSpaceWidth === 0 || videoSpaceHeight === 0) {
        // Avoid NaN values caused by division by 0.
        return [ 0, 0 ];
    }

    const aspectRatio = videoWidth / videoHeight;
    const videoSpaceRatio = videoSpaceWidth / videoSpaceHeight;

    switch (videoLayoutFit) {
    case 'height':
        return [ videoSpaceHeight * aspectRatio, videoSpaceHeight ];
    case 'width':
        return [ videoSpaceWidth, videoSpaceWidth / aspectRatio ];
    case 'nocrop':
        return computeCameraVideoSize(
            videoWidth,
            videoHeight,
            videoSpaceWidth,
            videoSpaceHeight,
            videoSpaceRatio < aspectRatio ? 'width' : 'height');
    case 'both': {
        const maxZoomCoefficient = interfaceConfig.MAXIMUM_ZOOMING_COEFFICIENT
            || Infinity;

        if (videoSpaceRatio === aspectRatio) {
            return [ videoSpaceWidth, videoSpaceHeight ];
        }

        let [ width, height ] = computeCameraVideoSize(
            videoWidth,
            videoHeight,
            videoSpaceWidth,
            videoSpaceHeight,
            videoSpaceRatio < aspectRatio ? 'height' : 'width');
        const maxWidth = videoSpaceWidth * maxZoomCoefficient;
        const maxHeight = videoSpaceHeight * maxZoomCoefficient;

        if (width > maxWidth) {
            width = maxWidth;
            height = width / aspectRatio;
        } else if (height > maxHeight) {
            height = maxHeight;
            width = height * aspectRatio;
        }

        return [ width, height ];
    }
    default:
        return [ videoWidth, videoHeight ];
    }
}