/**
 * FEWD common js lib functions
 *
 * @module
 */

export {
    auto_resize,
    auto_scroll_to_bottom
};


function
auto_resize
    (checkbox_element : HTMLInputElement,
     target_element   : HTMLTextAreaElement,
     max_height       : number)
    : void
{
    // if the user has manually resized their output, we do nothing
    if (checkbox_element.checked) {
        let target_height: number = target_element.scrollHeight;
        // resize it automagically up to 500px
        if (target_height < max_height)
            target_element.style.height = String(target_height) + 'px';
        else
            target_element.style.height = String(max_height) + 'px';
    }
}


function
auto_scroll_to_bottom
    (checkbox_element : HTMLInputElement,
     target_element   : HTMLTextAreaElement)
    : void
{
    if (checkbox_element.checked) {
        // scroll to bottom
        target_element.scrollTop = target_element.scrollHeight;
    }
}