/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

#include <QtInstanceScrolledWindow.hxx>
#include <QtInstanceScrolledWindow.moc>

#include <QtWidgets/QScrollBar>

QtInstanceScrolledWindow::QtInstanceScrolledWindow(QScrollArea* pScrollArea)
    : QtInstanceWidget(pScrollArea)
    , m_pScrollArea(pScrollArea)
{
    assert(m_pScrollArea);
}

void QtInstanceScrolledWindow::move(weld::Widget*, weld::Container*)
{
    assert(false && "Not implemented yet");
}

css::uno::Reference<css::awt::XWindow> QtInstanceScrolledWindow::CreateChildFrame()
{
    assert(false && "Not implemented yet");
    return nullptr;
}

void QtInstanceScrolledWindow::child_grab_focus() { assert(false && "Not implemented yet"); }

void QtInstanceScrolledWindow::hadjustment_configure(int nValue, int nLower, int nUpper,
                                                     int nStepIncrement, int nPageIncrement,
                                                     int nPageSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar();
        if (!pScrollBar)
            return;

        pScrollBar->setValue(nValue);
        pScrollBar->setMinimum(nLower);
        pScrollBar->setMaximum(nUpper);
        pScrollBar->setSingleStep(nStepIncrement);
        pScrollBar->setPageStep(nPageIncrement);
        if (QWidget* pWidget = m_pScrollArea->widget())
            pWidget->resize(nPageSize, pWidget->height());
    });
}

int QtInstanceScrolledWindow::hadjustment_get_value() const
{
    SolarMutexGuard g;

    int nValue = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar())
            nValue = pScrollBar->value();
    });

    return nValue;
}

void QtInstanceScrolledWindow::hadjustment_set_value(int nValue)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar())
            pScrollBar->setValue(nValue);
    });
}

int QtInstanceScrolledWindow::hadjustment_get_upper() const
{
    SolarMutexGuard g;

    int nMax = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar())
            nMax = pScrollBar->maximum();
    });

    return nMax;
}

void QtInstanceScrolledWindow::hadjustment_set_upper(int nUpper)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar())
            pScrollBar->setMaximum(nUpper);
    });
}

int QtInstanceScrolledWindow::hadjustment_get_page_size() const
{
    SolarMutexGuard g;

    int nPageSize = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QWidget* pWidget = m_pScrollArea->widget())
            nPageSize = pWidget->width();
    });

    return nPageSize;
}

void QtInstanceScrolledWindow::hadjustment_set_page_size(int nSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QWidget* pWidget = m_pScrollArea->widget())
            pWidget->resize(nSize, pWidget->height());
    });
}

void QtInstanceScrolledWindow::hadjustment_set_page_increment(int nSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar())
            pScrollBar->setPageStep(nSize);
    });
}

void QtInstanceScrolledWindow::hadjustment_set_step_increment(int nSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->horizontalScrollBar())
            pScrollBar->setSingleStep(nSize);
    });
}

void QtInstanceScrolledWindow::set_hpolicy(VclPolicyType eHPolicy)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread(
        [&] { m_pScrollArea->setHorizontalScrollBarPolicy(toQtPolicy(eHPolicy)); });
}

VclPolicyType QtInstanceScrolledWindow::get_hpolicy() const
{
    SolarMutexGuard g;

    VclPolicyType ePolicy = VclPolicyType::AUTOMATIC;
    GetQtInstance().RunInMainThread(
        [&] { ePolicy = toVclPolicy(m_pScrollArea->horizontalScrollBarPolicy()); });

    return ePolicy;
}

void QtInstanceScrolledWindow::vadjustment_configure(int nValue, int nLower, int nUpper,
                                                     int nStepIncrement, int nPageIncrement,
                                                     int nPageSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar();
        if (!pScrollBar)
            return;

        pScrollBar->setValue(nValue);
        pScrollBar->setMinimum(nLower);
        pScrollBar->setMaximum(nUpper);
        pScrollBar->setSingleStep(nStepIncrement);
        pScrollBar->setPageStep(nPageIncrement);
        if (QWidget* pWidget = m_pScrollArea->widget())
            pWidget->resize(pWidget->width(), nPageSize);
    });
}

int QtInstanceScrolledWindow::vadjustment_get_value() const
{
    SolarMutexGuard g;

    int nValue = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            nValue = pScrollBar->value();
    });

    return nValue;
}

void QtInstanceScrolledWindow::vadjustment_set_value(int nValue)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            pScrollBar->setValue(nValue);
    });
}

int QtInstanceScrolledWindow::vadjustment_get_upper() const
{
    SolarMutexGuard g;

    int nMax = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            nMax = pScrollBar->maximum();
    });

    return nMax;
}

void QtInstanceScrolledWindow::vadjustment_set_upper(int nUpper)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            pScrollBar->setMaximum(nUpper);
    });
}

int QtInstanceScrolledWindow::vadjustment_get_page_size() const
{
    SolarMutexGuard g;

    int nPageSize = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QWidget* pWidget = m_pScrollArea->widget())
            nPageSize = pWidget->height();
    });

    return nPageSize;
}

void QtInstanceScrolledWindow::vadjustment_set_page_size(int nSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QWidget* pWidget = m_pScrollArea->widget())
            pWidget->resize(pWidget->width(), nSize);
    });
}

void QtInstanceScrolledWindow::vadjustment_set_page_increment(int nSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            pScrollBar->setPageStep(nSize);
    });
}

void QtInstanceScrolledWindow::vadjustment_set_step_increment(int nSize)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            pScrollBar->setSingleStep(nSize);
    });
}

int QtInstanceScrolledWindow::vadjustment_get_lower() const
{
    SolarMutexGuard g;

    int nMin = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            nMin = pScrollBar->minimum();
    });

    return nMin;
}

void QtInstanceScrolledWindow::vadjustment_set_lower(int nLower)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pScrollBar = m_pScrollArea->verticalScrollBar())
            pScrollBar->setMinimum(nLower);
    });
}

void QtInstanceScrolledWindow::set_vpolicy(VclPolicyType eVPolicy)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread(
        [&] { m_pScrollArea->setVerticalScrollBarPolicy(toQtPolicy(eVPolicy)); });
}

VclPolicyType QtInstanceScrolledWindow::get_vpolicy() const
{
    SolarMutexGuard g;

    VclPolicyType ePolicy = VclPolicyType::AUTOMATIC;
    GetQtInstance().RunInMainThread(
        [&] { ePolicy = toVclPolicy(m_pScrollArea->verticalScrollBarPolicy()); });

    return ePolicy;
}

int QtInstanceScrolledWindow::get_scroll_thickness() const
{
    SolarMutexGuard g;

    int nThickness = 0;
    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pVerticalScrollBar = m_pScrollArea->verticalScrollBar())
            nThickness = pVerticalScrollBar->width();
        else if (QScrollBar* pHorizontalScrollBar = m_pScrollArea->horizontalScrollBar())
            nThickness = pHorizontalScrollBar->height();
    });

    return nThickness;
}

void QtInstanceScrolledWindow::set_scroll_thickness(int nThickness)
{
    SolarMutexGuard g;

    GetQtInstance().RunInMainThread([&] {
        if (QScrollBar* pVerticalScrollBar = m_pScrollArea->verticalScrollBar())
            pVerticalScrollBar->resize(nThickness, pVerticalScrollBar->height());
        else if (QScrollBar* pHorizontalScrollBar = m_pScrollArea->horizontalScrollBar())
            pHorizontalScrollBar->resize(pHorizontalScrollBar->width(), nThickness);
    });
}

void QtInstanceScrolledWindow::customize_scrollbars(const Color&, const Color&, const Color&)
{
    assert(false && "Not implemented yet");
}

Qt::ScrollBarPolicy QtInstanceScrolledWindow::toQtPolicy(VclPolicyType eVclPolicy)
{
    switch (eVclPolicy)
    {
        case VclPolicyType::ALWAYS:
            return Qt::ScrollBarAlwaysOn;
        case VclPolicyType::AUTOMATIC:
            return Qt::ScrollBarAsNeeded;
        case VclPolicyType::NEVER:
            return Qt::ScrollBarAlwaysOff;
        default:
            assert(false && "Unhandled scroll bar policy");
            return Qt::ScrollBarAsNeeded;
    }
}

VclPolicyType QtInstanceScrolledWindow::toVclPolicy(Qt::ScrollBarPolicy eQtPolicy)
{
    switch (eQtPolicy)
    {
        case Qt::ScrollBarAlwaysOn:
            return VclPolicyType::ALWAYS;
        case Qt::ScrollBarAsNeeded:
            return VclPolicyType::AUTOMATIC;
        case Qt::ScrollBarAlwaysOff:
            return VclPolicyType::NEVER;
        default:
            assert(false && "Unhandled scroll bar policy");
            return VclPolicyType::AUTOMATIC;
    }
}

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