.pragma library

// The caller supplies its viewport; focus never guesses a parent hierarchy.
function revealIn(item, viewport) {
    const top = item.mapToItem(viewport.contentItem, 0, 0).y;
    const target = top < viewport.contentY ? top : Math.max(viewport.contentY, top + item.height - viewport.height);
    viewport.contentY = Math.max(0, Math.min(target, viewport.contentHeight - viewport.height));
}

function parseJson(text, valueWhenInvalid) {
    try {
        return JSON.parse(String(text));
    } catch (error) {
        return valueWhenInvalid;
    }
}