/* -*- 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 <dialmgr.hxx>
#include <sfx2/docfile.hxx>
#include <unotools/viewoptions.hxx>
#include <vcl/svapp.hxx>
#include <vcl/settings.hxx>
#include <vcl/wrkwin.hxx>
#include <vcl/builderfactory.hxx>

// UNO-Stuff
#include <comphelper/processfactory.hxx>
#include <comphelper/sequence.hxx>
#include <com/sun/star/awt/XBitmap.hpp>
#include <com/sun/star/frame/Desktop.hpp>
#include <com/sun/star/frame/XComponentLoader.hpp>
#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/beans/PropertyValue.hpp>
#include <com/sun/star/document/XLinkTargetSupplier.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/io/IOException.hpp>

#include <toolkit/helper/vclunohelper.hxx>
#include <vcl/treelistentry.hxx>

#include <strings.hrc>
#include <hlmarkwn.hxx>
#include <hltpbase.hxx>

using namespace ::com::sun::star;

// Userdata-struct for tree-entries
struct TargetData
{
    OUString aUStrLinkname;
    bool     bIsTarget;

    TargetData (const OUString& aUStrLName, bool bTarget)
        : bIsTarget(bTarget)
    {
        if (bIsTarget)
            aUStrLinkname = aUStrLName;
    }
};

// Tree-Window
SvxHlmarkTreeLBox::SvxHlmarkTreeLBox(vcl::Window* pParent, WinBits nStyle)
    : SvTreeListBox(pParent, nStyle)
    , mpParentWnd(nullptr)
{
    SetNodeDefaultImages();
}

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

void SvxHlmarkTreeLBox::dispose()
{
    mpParentWnd.clear();
    SvTreeListBox::dispose();
}

VCL_BUILDER_FACTORY_CONSTRUCTOR(SvxHlmarkTreeLBox, WB_TABSTOP)

Size SvxHlmarkTreeLBox::GetOptimalSize() const
{
    return LogicToPixel(Size(103, 162), MapMode(MapUnit::MapAppFont));
}

void SvxHlmarkTreeLBox::Paint(vcl::RenderContext& rRenderContext, const ::tools::Rectangle& rRect)
{
    if (!mpParentWnd || mpParentWnd->mnError == LERR_NOERROR)
    {
        SvTreeListBox::Paint(rRenderContext, rRect);
    }
    else
    {
        Erase(rRenderContext);

        ::tools::Rectangle aDrawRect(Point( 0, 0 ), GetSizePixel());

        OUString aStrMessage;

        switch (mpParentWnd->mnError)
        {
        case LERR_NOENTRIES :
            aStrMessage = CuiResId( RID_SVXSTR_HYPDLG_ERR_LERR_NOENTRIES );
            break;
        case LERR_DOCNOTOPEN :
            aStrMessage = CuiResId( RID_SVXSTR_HYPDLG_ERR_LERR_DOCNOTOPEN );
            break;
        }

        rRenderContext.DrawText(aDrawRect, aStrMessage, DrawTextFlags::Left
                | DrawTextFlags::MultiLine | DrawTextFlags::WordBreak);
    }
}


//*** Window-Class ***
// Constructor / Destructor
SvxHlinkDlgMarkWnd::SvxHlinkDlgMarkWnd( SvxHyperlinkTabPageBase *pParent )
    : FloatingWindow(pParent, "HyperlinkMark", "cui/ui/hyperlinkmarkdialog.ui")
    , mbUserMoved(false)
    , mpParent(pParent)
    , mnError(LERR_NOERROR)
{
    get(mpBtApply, "apply");
    get(mpBtClose, "close");
    get(mpLbTree, "TreeListBox");
    mpLbTree->SetParentWnd(this);

    mpBtApply->SetClickHdl          ( LINK ( this, SvxHlinkDlgMarkWnd, ClickApplyHdl_Impl ) );
    mpBtClose->SetClickHdl       ( LINK ( this, SvxHlinkDlgMarkWnd, ClickCloseHdl_Impl ) );
    mpLbTree->SetDoubleClickHdl  ( LINK ( this, SvxHlinkDlgMarkWnd, DoubleClickApplyHdl_Impl ) );

    // add lines to the Tree-ListBox
    mpLbTree->SetStyle( mpLbTree->GetStyle() | WB_TABSTOP | WB_BORDER | WB_HASLINES |
                            WB_HASBUTTONS |  //WB_HASLINESATROOT |
                            WB_HSCROLL | WB_HASBUTTONSATROOT );
}

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

void SvxHlinkDlgMarkWnd::dispose()
{
    ClearTree();
    mpBtApply.clear();
    mpBtClose.clear();
    mpLbTree.clear();
    mpParent.clear();
    FloatingWindow::dispose();
}

// Set an errorstatus
sal_uInt16 SvxHlinkDlgMarkWnd::SetError( sal_uInt16 nError)
{
    sal_uInt16 nOldError = mnError;
    mnError = nError;

    if( mnError != LERR_NOERROR )
        ClearTree();

    mpLbTree->Invalidate();

    return nOldError;
}

// Move window
bool SvxHlinkDlgMarkWnd::MoveTo ( Point aNewPos )
{
    if ( !mbUserMoved )
    {
        bool bOldStatus = mbUserMoved;
        SetPosPixel ( aNewPos );
        mbUserMoved = bOldStatus;
    }

    return mbUserMoved;
}

void SvxHlinkDlgMarkWnd::Move ()
{
    Window::Move();

    if ( IsReallyVisible() )
        mbUserMoved = true;
}

bool SvxHlinkDlgMarkWnd::ConnectToDialog()
{
    bool bOldStatus = mbUserMoved;

    mbUserMoved = true;

    return bOldStatus;
}

namespace
{
    void SelectPath(SvTreeListEntry *pEntry, SvxHlmarkTreeLBox &rLbTree,
        std::deque<OUString> &rLastSelectedPath)
    {
        OUString sTitle(rLastSelectedPath.front());
        rLastSelectedPath.pop_front();
        if (sTitle.isEmpty())
            return;
        while (pEntry)
        {
            if (sTitle == rLbTree.GetEntryText(pEntry))
            {
                rLbTree.Select(pEntry);
                rLbTree.MakeVisible(pEntry);
                if (!rLastSelectedPath.empty())
                {
                    rLbTree.Expand(pEntry);
                    SelectPath(rLbTree.FirstChild(pEntry), rLbTree, rLastSelectedPath);
                }
                break;
            }
            pEntry = pEntry->NextSibling();
        }
    }
}

#define TG_SETTING_MANAGER  "TargetInDocument"
#define TG_SETTING_LASTMARK "LastSelectedMark"
#define TG_SETTING_LASTPATH "LastSelectedPath"

void SvxHlinkDlgMarkWnd::RestoreLastSelection()
{
    bool bSelectedEntry = false;

    OUString sLastSelectedMark;
    std::deque<OUString> aLastSelectedPath;
    SvtViewOptions aViewSettings( EViewType::Dialog, TG_SETTING_MANAGER );
    if (aViewSettings.Exists())
    {
        //Maybe we might want to have some sort of mru list and keep a mapping
        //per document, rather than the current reuse of "the last thing
        //selected, regardless of the document"
        aViewSettings.GetUserItem(TG_SETTING_LASTMARK) >>= sLastSelectedMark;
        uno::Sequence<OUString> aTmp;
        aViewSettings.GetUserItem(TG_SETTING_LASTPATH) >>= aTmp;
        aLastSelectedPath = comphelper::sequenceToContainer< std::deque<OUString> >(aTmp);
    }
    //fallback to previous entry selected the last time we executed this dialog.
    //First see if the exact mark exists and re-use that
    if (!sLastSelectedMark.isEmpty())
        bSelectedEntry = SelectEntry(sLastSelectedMark);
    //Otherwise just select the closest path available
    //now to what was available at dialog close time
    if (!bSelectedEntry && !aLastSelectedPath.empty())
    {
        std::deque<OUString> aTmpSelectedPath(aLastSelectedPath);
        SelectPath(mpLbTree->First(), *mpLbTree, aTmpSelectedPath);
    }
}

// Interface to refresh tree
void SvxHlinkDlgMarkWnd::RefreshTree (const OUString& aStrURL)
{
    OUString aUStrURL;

    EnterWait();

    ClearTree();

    sal_Int32 nPos = aStrURL.indexOf('#');

    if (nPos != 0)
        aUStrURL = aStrURL;

    if (!RefreshFromDoc(aUStrURL))
        mpLbTree->Invalidate();

    bool bSelectedEntry = false;

    if ( nPos != -1 )
    {
        OUString aStrMark = aStrURL.copy(nPos+1);
        bSelectedEntry = SelectEntry(aStrMark);
    }

    if (!bSelectedEntry)
        RestoreLastSelection();

    LeaveWait();
}

// get links from document
bool SvxHlinkDlgMarkWnd::RefreshFromDoc(const OUString& aURL)
{
    mnError = LERR_NOERROR;

    uno::Reference< frame::XDesktop2 > xDesktop = frame::Desktop::create( ::comphelper::getProcessComponentContext() );
    uno::Reference< lang::XComponent > xComp;

    if( !aURL.isEmpty() )
    {
        // load from url
        uno::Reference< frame::XComponentLoader > xLoader( xDesktop, uno::UNO_QUERY );
        if( xLoader.is() )
        {
            try
            {
                uno::Sequence< beans::PropertyValue > aArg(1);
                aArg.getArray()[0].Name = "Hidden";
                aArg.getArray()[0].Value <<= true;
                xComp = xLoader->loadComponentFromURL( aURL, "_blank", 0, aArg );
            }
            catch( const io::IOException& )
            {

            }
            catch( const lang::IllegalArgumentException& )
            {

            }
        }
    }
    else
    {
        // the component with user focus ( current document )
        xComp = xDesktop->getCurrentComponent();
    }

    if( xComp.is() )
    {
        uno::Reference< document::XLinkTargetSupplier > xLTS( xComp, uno::UNO_QUERY );

        if( xLTS.is() )
        {
            if( FillTree( xLTS->getLinks() ) == 0 )
                mnError = LERR_NOENTRIES;
        }
        else
            mnError = LERR_DOCNOTOPEN;

        if ( !aURL.isEmpty() )
            xComp->dispose();
    }
    else
    {
        if( !aURL.isEmpty() )
            mnError=LERR_DOCNOTOPEN;
    }
    return (mnError==0);
}

// Fill Tree-Control
int SvxHlinkDlgMarkWnd::FillTree( const uno::Reference< container::XNameAccess >& xLinks, SvTreeListEntry* pParentEntry )
{
    int nEntries=0;
    const uno::Sequence< OUString > aNames( xLinks->getElementNames() );
    const sal_uLong nLinks = aNames.getLength();
    const OUString* pNames = aNames.getConstArray();

    const OUString aProp_LinkDisplayName( "LinkDisplayName" );
    const OUString aProp_LinkTarget( "com.sun.star.document.LinkTarget" );
    const OUString aProp_LinkDisplayBitmap( "LinkDisplayBitmap" );
    for( sal_uLong i = 0; i < nLinks; i++ )
    {
        uno::Any aAny;
        OUString aLink( *pNames++ );

        bool bError = false;
        try
        {
            aAny = xLinks->getByName( aLink );
        }
        catch(const uno::Exception&)
        {
            // if the name of the target was invalid (like empty headings)
            // no object can be provided
            bError = true;
        }
        if(bError)
            continue;

        uno::Reference< beans::XPropertySet > xTarget;

        if( aAny >>= xTarget )
        {
            try
            {
                // get name to display
                aAny = xTarget->getPropertyValue( aProp_LinkDisplayName );
                OUString aDisplayName;
                aAny >>= aDisplayName;
                OUString aStrDisplayname ( aDisplayName );

                // is it a target ?
                uno::Reference< lang::XServiceInfo > xSI( xTarget, uno::UNO_QUERY );
                bool bIsTarget = xSI->supportsService( aProp_LinkTarget );

                // create userdata
                TargetData *pData = new TargetData ( aLink, bIsTarget );

                SvTreeListEntry* pEntry;

                try
                {
                    // get bitmap for the tree-entry
                    uno::Reference< awt::XBitmap >
                        aXBitmap( xTarget->getPropertyValue( aProp_LinkDisplayBitmap ), uno::UNO_QUERY );
                    if( aXBitmap.is() )
                    {
                        Image aBmp(BitmapEx(VCLUnoHelper::GetBitmap(aXBitmap).GetBitmap(), /*mask*/COL_LIGHTMAGENTA));
                        // insert Displayname into treelist with bitmaps
                        pEntry = mpLbTree->InsertEntry ( aStrDisplayname,
                                                        aBmp, aBmp,
                                                        pParentEntry,
                                                        false, TREELIST_APPEND,
                                                        static_cast<void*>(pData) );
                        nEntries++;
                    }
                    else
                    {
                        // insert Displayname into treelist without bitmaps
                        pEntry = mpLbTree->InsertEntry ( aStrDisplayname,
                                                        pParentEntry,
                                                        false, TREELIST_APPEND,
                                                        static_cast<void*>(pData) );
                        nEntries++;
                    }
                }
                catch(const css::uno::Exception&)
                {
                    // insert Displayname into treelist without bitmaps
                    pEntry = mpLbTree->InsertEntry ( aStrDisplayname,
                                                    pParentEntry,
                                                    false, TREELIST_APPEND,
                                                    static_cast<void*>(pData) );
                    nEntries++;
                }

                uno::Reference< document::XLinkTargetSupplier > xLTS( xTarget, uno::UNO_QUERY );
                if( xLTS.is() )
                    nEntries += FillTree( xLTS->getLinks(), pEntry );
            }
            catch(const css::uno::Exception&)
            {
            }
        }
    }

    return nEntries;
}

// Clear Tree
void SvxHlinkDlgMarkWnd::ClearTree()
{
    SvTreeListEntry* pEntry = mpLbTree->First();

    while ( pEntry )
    {
        TargetData* pUserData = static_cast<TargetData *>(pEntry->GetUserData());
        delete pUserData;

        pEntry = mpLbTree->Next( pEntry );
    }

    mpLbTree->Clear();
}

// Find Entry for String
SvTreeListEntry* SvxHlinkDlgMarkWnd::FindEntry (const OUString& aStrName)
{
    bool bFound=false;
    SvTreeListEntry* pEntry = mpLbTree->First();

    while ( pEntry && !bFound )
    {
        TargetData* pUserData = static_cast<TargetData *>(pEntry->GetUserData ());
        if (aStrName == pUserData->aUStrLinkname)
            bFound = true;
        else
            pEntry = mpLbTree->Next( pEntry );
    }

    return pEntry;
}

// Select Entry
bool SvxHlinkDlgMarkWnd::SelectEntry(const OUString& aStrMark)
{
    SvTreeListEntry* pEntry = FindEntry(aStrMark);
    if (!pEntry)
        return false;
    mpLbTree->Select(pEntry);
    mpLbTree->MakeVisible (pEntry);
    return true;
}

// Click on Apply-Button / Double-click on item in tree
IMPL_LINK_NOARG(SvxHlinkDlgMarkWnd, DoubleClickApplyHdl_Impl, SvTreeListBox*, bool)
{
    ClickApplyHdl_Impl(nullptr);
    return false;
}

IMPL_LINK_NOARG(SvxHlinkDlgMarkWnd, ClickApplyHdl_Impl, Button*, void)
{
    SvTreeListEntry* pEntry = mpLbTree->GetCurEntry();

    if ( pEntry )
    {
        TargetData *pData = static_cast<TargetData *>(pEntry->GetUserData());

        if ( pData->bIsTarget )
        {
            mpParent->SetMarkStr(pData->aUStrLinkname);
        }
    }
}

// Click on Close-Button
IMPL_LINK_NOARG(SvxHlinkDlgMarkWnd, ClickCloseHdl_Impl, Button*, void)
{
    SvTreeListEntry* pEntry = mpLbTree->GetCurEntry();
    if ( pEntry )
    {
        TargetData* pUserData = static_cast<TargetData *>(pEntry->GetUserData());
        OUString sLastSelectedMark = pUserData->aUStrLinkname;

        std::deque<OUString> aLastSelectedPath;
        if (pEntry)
        {
            //If the bottommost entry is expanded but nothing
            //underneath it is selected leave a dummy entry
            if (mpLbTree->IsExpanded(pEntry))
                aLastSelectedPath.push_front(OUString());
            while (pEntry)
            {
                aLastSelectedPath.push_front(mpLbTree->GetEntryText(pEntry));
                pEntry = mpLbTree->GetParent(pEntry);
            }
        }

        uno::Sequence< beans::NamedValue > aSettings
        {
            { TG_SETTING_LASTMARK, css::uno::Any(sLastSelectedMark) },
            { TG_SETTING_LASTPATH, css::uno::Any(comphelper::containerToSequence(aLastSelectedPath)) }
        };

        // write
        SvtViewOptions aViewSettings( EViewType::Dialog, TG_SETTING_MANAGER );
        aViewSettings.SetUserData( aSettings );
    }

    Close();
}

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