// listview.cpp：消除重复代码的优化实现
static bool isFocusableItemType(ItemFuncType t)
{
    return t != ItemFuncType_GroupLabel && t != ItemFuncType_ItemLabel;
}

// 提取通用查找逻辑
int ListView::findFocusableIndex(int start, int end, int step)
{
    for (int i = start; i != end + step; i += step) {
        if (i >= 0 && i < m_itemList.count() && isFocusableItemType(m_itemList.at(i)->getFuncType())) {
            return i;
        }
    }
    return -1;
}

int ListView::firstFocusableIndex()
{
    return m_itemList.isEmpty() ? -1 : findFocusableIndex(0, m_itemList.count() - 1, 1);
}

int ListView::lastFocusableIndex()
{
    return m_itemList.isEmpty() ? -1 : findFocusableIndex(m_itemList.count() - 1, 0, -1);
}

int ListView::nextFocusableIndex(int from)
{
    return findFocusableIndex(from + 1, m_itemList.count() - 1, 1);
}

int ListView::prevFocusableIndex(int from)
{
    return findFocusableIndex(from - 1, 0, -1);
}

// remotemanagementpanel.cpp：修复边界fallback逻辑
void RemoteManagementPanel::setFocusInPanel()
{
    if (m_listWidget->isVisible()) {
        qCDebug(remotemanage) << "list widget is visible, setting focus";
        /******** Modify by ut000610 daizhengwen 2020-07-27:bug#39775 Begin***************/
        // 将焦点设置在列表里的第一个可聚焦项
        int idx = m_listWidget->firstFocusableIndex();
        if (idx >= 0) {
            m_listWidget->setCurrentIndex(idx);
        } else {
            // 列表为空或全为不可聚焦项时，直接将焦点设置到添加按钮
            m_pushButton->setFocus();
        }
        /********************* Modify by ut000610 daizhengwen End ************************/
    } else {
        qCDebug(remotemanage) << "setting focus on add button";
        m_pushButton->setFocus();
    }
}