/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <vcl/fixed.hxx>
#include <vcl/layout.hxx>
#include <vcl/tabctrl.hxx>
#include <vcl/tabdlg.hxx>
#include <vcl/tabpage.hxx>

void TabDialog::ImplInitTabDialogData()
{
    mpFixedLine     = nullptr;
    mpViewWindow    = nullptr;
    meViewAlign     = WindowAlign::Left;
    mbPosControls   = true;
}

void TabDialog::ImplPosControls()
{
    if (isLayoutEnabled())
        return;

    Size        aCtrlSize( IMPL_MINSIZE_BUTTON_WIDTH, IMPL_MINSIZE_BUTTON_HEIGHT );
    long        nDownCtrl = 0;
    long        nOffY = 0;
    vcl::Window*     pTabControl = nullptr;

    vcl::Window* pChild = GetWindow( GetWindowType::FirstChild );
    while ( pChild )
    {
        if ( pChild->IsVisible() && (pChild != mpViewWindow) )
        {
            if (pChild->GetType() == WindowType::TABCONTROL || isContainerWindow(*pChild))
                pTabControl = pChild;
            else if ( pTabControl )
            {
                Size aOptimalSize(pChild->get_preferred_size());
                long nTxtWidth = aOptimalSize.Width();
                if ( nTxtWidth > aCtrlSize.Width() )
                    aCtrlSize.setWidth( nTxtWidth );
                long nTxtHeight = aOptimalSize.Height();
                if ( nTxtHeight > aCtrlSize.Height() )
                    aCtrlSize.setHeight( nTxtHeight );
                nDownCtrl++;
            }
            else
            {
                long nHeight = pChild->GetSizePixel().Height();
                if ( nHeight > nOffY )
                    nOffY = nHeight;
            }
        }

        pChild = pChild->GetWindow( GetWindowType::Next );
    }

    // do we have a TabControl ?
    if ( pTabControl )
    {
        // adapt offset for other controls by an extra distance
        if ( nOffY )
            nOffY += IMPL_DIALOG_BAR_OFFSET*2 + 2;

        Point   aTabOffset( IMPL_DIALOG_OFFSET, IMPL_DIALOG_OFFSET+nOffY );

        if (isContainerWindow(*pTabControl))
            pTabControl->SetSizePixel(pTabControl->get_preferred_size());

        Size    aTabSize = pTabControl->GetSizePixel();

        Size    aDlgSize( aTabSize.Width() + IMPL_DIALOG_OFFSET*2,
                          aTabSize.Height() + IMPL_DIALOG_OFFSET*2 + nOffY );
        long    nBtnEx = 0;

        // consider preview window and adapt the sizes/offsets
        if ( mpViewWindow && mpViewWindow->IsVisible() )
        {
            long    nViewOffX = 0;
            long    nViewOffY = 0;
            long    nViewWidth = 0;
            long    nViewHeight = 0;
            PosSizeFlags nViewPosFlags = PosSizeFlags::Pos;
            Size    aViewSize = mpViewWindow->GetSizePixel();
            if (  meViewAlign == WindowAlign::Top )
            {
                nViewOffX       = aTabOffset.X();
                nViewOffY       = nOffY+IMPL_DIALOG_OFFSET;
                nViewWidth      = aTabSize.Width();
                nViewPosFlags  |= PosSizeFlags::Width;
                aTabOffset.AdjustY(aViewSize.Height()+IMPL_DIALOG_OFFSET );
                aDlgSize.AdjustHeight(aViewSize.Height()+IMPL_DIALOG_OFFSET );
            }
            else if (  meViewAlign == WindowAlign::Bottom )
            {
                nViewOffX       = aTabOffset.X();
                nViewOffY       = aTabOffset.Y()+aTabSize.Height()+IMPL_DIALOG_OFFSET;
                nViewWidth      = aTabSize.Width();
                nViewPosFlags  |= PosSizeFlags::Width;
                aDlgSize.AdjustHeight(aViewSize.Height()+IMPL_DIALOG_OFFSET );
            }
            else if (  meViewAlign == WindowAlign::Right )
            {
                nViewOffX       = aTabOffset.X()+aTabSize.Width()+IMPL_DIALOG_OFFSET;
                nViewOffY       = aTabOffset.Y();
                nViewHeight     = aTabSize.Height();
                nViewPosFlags  |= PosSizeFlags::Height;
                aDlgSize.AdjustWidth(aViewSize.Width()+IMPL_DIALOG_OFFSET );
                nBtnEx          = aViewSize.Width()+IMPL_DIALOG_OFFSET;
            }
            else // meViewAlign == WindowAlign::Left
            {
                nViewOffX       = IMPL_DIALOG_OFFSET;
                nViewOffY       = aTabOffset.Y();
                nViewHeight     = aTabSize.Height();
                nViewPosFlags  |= PosSizeFlags::Height;
                aTabOffset.AdjustX(aViewSize.Width()+IMPL_DIALOG_OFFSET );
                aDlgSize.AdjustWidth(aViewSize.Width()+IMPL_DIALOG_OFFSET );
                nBtnEx          = aViewSize.Width()+IMPL_DIALOG_OFFSET;
            }

            mpViewWindow->setPosSizePixel( nViewOffX, nViewOffY,
                                           nViewWidth, nViewHeight,
                                           nViewPosFlags );
        }

        // adapt positioning
        pTabControl->SetPosPixel( aTabOffset );

        // position all other Children
        bool bTabCtrl   = false;
        int  nLines     = 0;
        long nX;
        long nY         = aDlgSize.Height();
        long nTopX      = IMPL_DIALOG_OFFSET;

        // all buttons are right aligned under Windows 95
        nX = IMPL_DIALOG_OFFSET;
        long nCtrlBarWidth = ((aCtrlSize.Width()+IMPL_DIALOG_OFFSET)*nDownCtrl)-IMPL_DIALOG_OFFSET;
        if ( nCtrlBarWidth <= (aTabSize.Width()+nBtnEx) )
            nX = (aTabSize.Width()+nBtnEx) - nCtrlBarWidth + IMPL_DIALOG_OFFSET;

        vcl::Window* pChild2 = GetWindow( GetWindowType::FirstChild );
        while ( pChild2 )
        {
            if ( pChild2->IsVisible() && (pChild2 != mpViewWindow) )
            {
                if ( pChild2 == pTabControl )
                    bTabCtrl = true;
                else if ( bTabCtrl )
                {
                    if ( !nLines )
                        nLines = 1;

                    if ( nX+aCtrlSize.Width()-IMPL_DIALOG_OFFSET > (aTabSize.Width()+nBtnEx) )
                    {
                        nY += aCtrlSize.Height()+IMPL_DIALOG_OFFSET;
                        nX  = IMPL_DIALOG_OFFSET;
                        nLines++;
                    }

                    pChild2->SetPosSizePixel( Point( nX, nY ), aCtrlSize );
                    nX += aCtrlSize.Width()+IMPL_DIALOG_OFFSET;
                }
                else
                {
                    Size aChildSize = pChild2->GetSizePixel();
                    pChild2->SetPosPixel( Point( nTopX, (nOffY-aChildSize.Height())/2 ) );
                    nTopX += aChildSize.Width()+2;
                }
            }

            pChild2 = pChild2->GetWindow( GetWindowType::Next );
        }

        aDlgSize.AdjustHeight(nLines * (aCtrlSize.Height()+IMPL_DIALOG_OFFSET) );
        SetOutputSizePixel( aDlgSize );
    }

    // store offset
    if ( nOffY )
    {
        Size aDlgSize = GetOutputSizePixel();
        if ( !mpFixedLine )
            mpFixedLine = VclPtr<FixedLine>::Create( this );
        mpFixedLine->SetPosSizePixel( Point( 0, nOffY ),
                                      Size( aDlgSize.Width(), 2 ) );
        mpFixedLine->Show();
    }

    mbPosControls = false;
}

TabDialog::TabDialog( vcl::Window* pParent, WinBits nStyle ) :
    Dialog( WindowType::TABDIALOG )
{
    ImplInitTabDialogData();
    ImplInit( pParent, nStyle );
}

TabDialog::TabDialog( vcl::Window* pParent, const OUString& rID, const OUString& rUIXMLDescription ) :
    Dialog(pParent, rID, rUIXMLDescription, WindowType::TABDIALOG)
{
    ImplInitTabDialogData();
}

TabDialog::~TabDialog()
{
    disposeOnce();
}

void TabDialog::dispose()
{
    mpFixedLine.disposeAndClear();
    mpViewWindow.clear();
    Dialog::dispose();
}

void TabDialog::StateChanged( StateChangedType nType )
{
    if ( nType == StateChangedType::InitShow )
    {
        // Calculate the Layout only for the initialized state
        if ( mbPosControls )
            ImplPosControls();
    }
    Dialog::StateChanged( nType );
}

static vcl::Window* findTabControl(vcl::Window* pCurrent)
{
    if (!pCurrent)
    {
        return nullptr;
    }

    if (pCurrent->GetType() == WindowType::TABCONTROL)
    {
        return pCurrent;
    }

    vcl::Window* pChild = pCurrent->GetWindow(GetWindowType::FirstChild);

    while (pChild)
    {

        vcl::Window* pInorderChild = findTabControl(pChild);

        if (pInorderChild)
        {
            return pInorderChild;
        }

        pChild = pChild->GetWindow(GetWindowType::Next);
    }

    return nullptr;
}

std::vector<OString> TabDialog::getAllPageUIXMLDescriptions() const
{
    std::vector<OString> aRetval;

    const TabControl* pTabCtrl = dynamic_cast<TabControl*>(findTabControl(const_cast<TabDialog*>(this)));

    if (pTabCtrl)
    {
        for (sal_uInt16 a(0); a < pTabCtrl->GetPageCount(); a++)
        {
            const sal_uInt16 nPageId(pTabCtrl->GetPageId(a));

            if (TAB_PAGE_NOTFOUND != nPageId)
            {
                TabPage* pCandidate = pTabCtrl->GetTabPage(nPageId);

                if (pCandidate)
                {
                    OString aNewName(pCandidate->getUIFile());

                    if (!aNewName.isEmpty())
                    {
                        // we have to check for double entries, this may happen e.g.
                        // in the HeaderFooterDialog which has two times the same
                        // tabPage added. Add the PageID as hint to the name, separated
                        // by a token (using "|" here). Do not do this for 1st occurrence,
                        // that is used for detection and is not necessary.
                        // Use the UIXMLDescription without trailing '.ui', with one trailing '/'
                        bool bAlreadyAdded(false);

                        for (auto const& elem : aRetval)
                        {
                            bAlreadyAdded = (elem == aNewName);
                            if (bAlreadyAdded)
                                break;
                        }

                        if (bAlreadyAdded)
                        {
                            // add the PageId to be able to detect the correct tabPage in
                            // selectPageByUIXMLDescription below
                            aNewName = aNewName + "|" + OString::number(nPageId);
                        }

                        aRetval.push_back(aNewName);
                    }
                }
            }
        }
    }

    return aRetval;
}

bool TabDialog::selectPageByUIXMLDescription(const OString& rUIXMLDescription)
{
    TabControl* pTabCtrl = dynamic_cast<TabControl*>(findTabControl(this));

    if (pTabCtrl)
    {
        sal_uInt32 nTargetPageId(0);
        OString aTargetName(rUIXMLDescription);
        const sal_Int32 nIndexOfSeparator(rUIXMLDescription.indexOf("|"));

        if (-1 != nIndexOfSeparator)
        {
            // more than one tabPage with that UXMLDescription is added to this dialog,
            // see getAllPageUIXMLDescriptions() above. Extract target PageId and
            // strip the UXMLDescription name for comparison
            nTargetPageId = rUIXMLDescription.copy(nIndexOfSeparator + 1).toUInt32();
            aTargetName = rUIXMLDescription.copy(0, nIndexOfSeparator);
        }

        for (sal_uInt16 a(0); a < pTabCtrl->GetPageCount(); a++)
        {
            const sal_uInt16 nPageId(pTabCtrl->GetPageId(a));

            if (TAB_PAGE_NOTFOUND != nPageId)
            {
                TabPage* pCandidate = pTabCtrl->GetTabPage(nPageId);

                if (pCandidate)
                {
                    if (pCandidate->getUIFile() == aTargetName)
                    {
                        if (nTargetPageId)
                        {
                            // when multiple versions may exist, name is not sufficient. Also
                            // check for the given PageId to select the correct tabPage
                            // for cases where the same TabPage is used more than once
                            // in a tabDialog (e.g. HeaderFooterDialog)
                            if (nTargetPageId == nPageId)
                            {
                                pTabCtrl->SelectTabPage(nPageId);
                                return true;
                            }
                        }
                        else
                        {
                            // select that tabPage
                            pTabCtrl->SelectTabPage(nPageId);
                            return true;
                        }
                    }
                }
            }
        }
    }

    return false;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */