/* -*- 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/.
 */

#include <config_folders.h>

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include <algorithm>
#include <memory>
#include <iostream>
#include <boost/property_tree/json_parser.hpp>

#include <LibreOfficeKit/LibreOfficeKit.h>
#include <LibreOfficeKit/LibreOfficeKitEnums.h>

#include <sal/log.hxx>
#include <vcl/errinf.hxx>
#include <osl/file.hxx>
#include <osl/process.h>
#include <osl/thread.h>
#include <rtl/bootstrap.hxx>
#include <rtl/strbuf.hxx>
#include <rtl/uri.hxx>
#include <cppuhelper/bootstrap.hxx>
#include <comphelper/dispatchcommand.hxx>
#include <comphelper/lok.hxx>
#include <comphelper/processfactory.hxx>
#include <comphelper/string.hxx>
#include <comphelper/propertysequence.hxx>
#include <comphelper/scopeguard.hxx>

#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/container/XNameAccess.hpp>
#include <com/sun/star/frame/Desktop.hpp>
#include <com/sun/star/frame/DispatchResultEvent.hpp>
#include <com/sun/star/frame/DispatchResultState.hpp>
#include <com/sun/star/frame/XDispatchProvider.hpp>
#include <com/sun/star/frame/XSynchronousDispatch.hpp>
#include <com/sun/star/frame/XStorable.hpp>
#include <com/sun/star/lang/Locale.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/style/XStyleFamiliesSupplier.hpp>
#include <com/sun/star/ucb/XContentProvider.hpp>
#include <com/sun/star/ucb/XUniversalContentBroker.hpp>
#include <com/sun/star/util/URLTransformer.hpp>
#include <com/sun/star/datatransfer/clipboard/XClipboard.hpp>
#include <com/sun/star/text/TextContentAnchorType.hpp>
#include <com/sun/star/document/XRedlinesSupplier.hpp>

#include <com/sun/star/linguistic2/LinguServiceManager.hpp>
#include <com/sun/star/linguistic2/XSpellChecker.hpp>

#include <editeng/fontitem.hxx>
#include <editeng/flstitem.hxx>
#include <sfx2/objsh.hxx>
#include <sfx2/viewsh.hxx>
#include <sfx2/viewfrm.hxx>
#include <sfx2/msgpool.hxx>
#include <sfx2/dispatch.hxx>
#include <sfx2/lokhelper.hxx>
#include <svx/dialmgr.hxx>
#include <svx/dialogs.hrc>
#include <svx/strings.hrc>
#include <svx/ruler.hxx>
#include <svx/svxids.hrc>
#include <svx/ucsubset.hxx>
#include <vcl/vclevent.hxx>
#include <vcl/svapp.hxx>
#include <unotools/resmgr.hxx>
#include <tools/fract.hxx>
#include <svtools/ctrltool.hxx>
#include <svtools/langtab.hxx>
#include <vcl/fontcharmap.hxx>
#include <vcl/graphicfilter.hxx>
#include <vcl/ptrstyle.hxx>
#include <vcl/sysdata.hxx>
#include <vcl/virdev.hxx>
#include <vcl/ITiledRenderable.hxx>
#include <vcl/IDialogRenderable.hxx>
#include <unicode/uchar.h>
#include <unotools/configmgr.hxx>
#include <unotools/syslocaleoptions.hxx>
#include <unotools/mediadescriptor.hxx>
#include <osl/module.hxx>
#include <comphelper/sequence.hxx>
#include <sfx2/sfxbasemodel.hxx>
#include <svl/undo.hxx>
#include <unotools/datetime.hxx>
#include <android/compatibility.hxx>

#include <app.hxx>

#include "../app/cmdlineargs.hxx"
// We also need to hackily be able to start the main libreoffice thread:
#include "../app/sofficemain.h"
#include "../app/officeipcthread.hxx"
#include <lib/init.hxx>

#include "lokinteractionhandler.hxx"
#include "lokclipboard.hxx"

using namespace css;
using namespace vcl;
using namespace desktop;
using namespace utl;

static LibLibreOffice_Impl *gImpl = nullptr;
static std::weak_ptr< LibreOfficeKitClass > gOfficeClass;
static std::weak_ptr< LibreOfficeKitDocumentClass > gDocumentClass;

typedef struct
{
    const char *extn;
    const char *filterName;
} ExtensionMap;

static const ExtensionMap aWriterExtensionMap[] =
{
    { "doc",   "MS Word 97" },
    { "docm",  "MS Word 2007 XML VBA" },
    { "docx",  "MS Word 2007 XML" },
    { "fodt",  "OpenDocument Text Flat XML" },
    { "html",  "HTML (StarWriter)" },
    { "odt",   "writer8" },
    { "ott",   "writer8_template" },
    { "pdf",   "writer_pdf_Export" },
    { "rtf",   "Rich Text Format" },
    { "txt",   "Text" },
    { "xhtml", "XHTML Writer File" },
    { "png",   "writer_png_Export" },
    { nullptr, nullptr }
};

static const ExtensionMap aCalcExtensionMap[] =
{
    { "csv",   "Text - txt - csv (StarCalc)" },
    { "fods",  "OpenDocument Spreadsheet Flat XML" },
    { "html",  "HTML (StarCalc)" },
    { "ods",   "calc8" },
    { "ots",   "calc8_template" },
    { "pdf",   "calc_pdf_Export" },
    { "xhtml", "XHTML Calc File" },
    { "xls",   "MS Excel 97" },
    { "xlsm",  "Calc MS Excel 2007 VBA XML" },
    { "xlsx",  "Calc MS Excel 2007 XML" },
    { "png",   "calc_png_Export" },
    { nullptr, nullptr }
};

static const ExtensionMap aImpressExtensionMap[] =
{
    { "fodp",  "OpenDocument Presentation Flat XML" },
    { "html",  "impress_html_Export" },
    { "odg",   "impress8_draw" },
    { "odp",   "impress8" },
    { "otp",   "impress8_template" },
    { "pdf",   "impress_pdf_Export" },
    { "potm",  "Impress MS PowerPoint 2007 XML Template" },
    { "pot",   "MS PowerPoint 97 Vorlage" },
    { "pptm",  "Impress MS PowerPoint 2007 XML VBA" },
    { "pptx",  "Impress MS PowerPoint 2007 XML" },
    { "pps",   "MS PowerPoint 97 Autoplay" },
    { "ppt",   "MS PowerPoint 97" },
    { "svg",   "impress_svg_Export" },
    { "swf",   "impress_flash_Export" },
    { "xhtml", "XHTML Impress File" },
    { "png",   "impress_png_Export"},
    { nullptr, nullptr }
};

static const ExtensionMap aDrawExtensionMap[] =
{
    { "fodg",  "draw_ODG_FlatXML" },
    { "html",  "draw_html_Export" },
    { "odg",   "draw8" },
    { "pdf",   "draw_pdf_Export" },
    { "svg",   "draw_svg_Export" },
    { "swf",   "draw_flash_Export" },
    { "xhtml", "XHTML Draw File" },
    { "png",   "draw_png_Export"},
    { nullptr, nullptr }
};

/*
 * Map directly to css cursor styles to avoid further mapping in the client.
 * Gtk (via gdk_cursor_new_from_name) also supports the same css cursor styles.
 *
 * This was created partially with help of the mappings in gtkdata.cxx.
 * The list is incomplete as some cursor style simply aren't supported
 * by css, it might turn out to be worth mapping some of these missing cursors
 * to available cursors?
 */
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning( disable : 4592)
#endif
static const std::map <PointerStyle, OString> aPointerMap {
    { PointerStyle::Arrow, "default" },
    // PointerStyle::Null ?
    { PointerStyle::Wait, "wait" },
    { PointerStyle::Text, "text" },
    { PointerStyle::Help, "help" },
    { PointerStyle::Cross, "crosshair" },
    { PointerStyle::Fill, "fill" },
    { PointerStyle::Move, "move" },
    { PointerStyle::NSize, "n-resize" },
    { PointerStyle::SSize, "s-resize" },
    { PointerStyle::WSize, "w-resize" },
    { PointerStyle::ESize, "e-resize" },
    { PointerStyle::NWSize, "ne-resize" },
    { PointerStyle::NESize, "ne-resize" },
    { PointerStyle::SWSize, "sw-resize" },
    { PointerStyle::SESize, "se-resize" },
    // WindowNSize through WindowSESize
    { PointerStyle::HSplit, "col-resize" },
    { PointerStyle::VSplit, "row-resize" },
    { PointerStyle::HSizeBar, "col-resize" },
    { PointerStyle::VSizeBar, "row-resize" },
    { PointerStyle::Hand, "grab" },
    { PointerStyle::RefHand, "grabbing" },
    // Pen, Magnify, Fill, Rotate
    // HShear, VShear
    // Mirror, Crook, Crop, MovePoint, MoveBezierWeight
    // MoveData
    { PointerStyle::CopyData, "copy" },
    { PointerStyle::LinkData, "alias" },
    // MoveDataLink, CopyDataLink
    //MoveFile, CopyFile, LinkFile
    // MoveFileLink, CopyFileLink, MoveFiless, CopyFiles
    { PointerStyle::NotAllowed, "not-allowed" },
    // DrawLine through DrawCaption
    // Chart, Detective, PivotCol, PivotRow, PivotField, Chain, ChainNotAllowed
    // AutoScrollN through AutoScrollNSWE
    { PointerStyle::TextVertical, "vertical-text" }
    // Pivot Delete, TabSelectS through TabSelectSW
    // PaintBrush, HideWhiteSpace, ShowWhiteSpace
};
#ifdef _MSC_VER
#pragma warning(pop)
#endif

static OUString getUString(const char* pString)
{
    if (pString == nullptr)
        return OUString();

    OString sString(pString, strlen(pString));
    return OStringToOUString(sString, RTL_TEXTENCODING_UTF8);
}

/// Try to convert a relative URL to an absolute one, unless it already looks like an URL.
static OUString getAbsoluteURL(const char* pURL)
{
    OUString aURL(getUString(pURL));
    if (aURL.isEmpty())
        return aURL;

    // convert relative paths to absolute ones
    OUString aWorkingDir;
    osl_getProcessWorkingDir(&aWorkingDir.pData);
    if (!aWorkingDir.endsWith("/"))
        aWorkingDir += "/";

    try
    {
        return rtl::Uri::convertRelToAbs(aWorkingDir, aURL);
    }
    catch (const rtl::MalformedUriException &)
    {
    }

    return OUString();
}

static std::vector<beans::PropertyValue> jsonToPropertyValuesVector(const char* pJSON)
{
    std::vector<beans::PropertyValue> aArguments;
    if (pJSON && pJSON[0] != '\0')
    {
        boost::property_tree::ptree aTree;
        std::stringstream aStream(pJSON);
        boost::property_tree::read_json(aStream, aTree);

        for (const auto& rPair : aTree)
        {
            const std::string& rType = rPair.second.get<std::string>("type");
            const std::string& rValue = rPair.second.get<std::string>("value");

            beans::PropertyValue aValue;
            aValue.Name = OUString::fromUtf8(rPair.first.c_str());
            if (rType == "string")
                aValue.Value <<= OUString::fromUtf8(rValue.c_str());
            else if (rType == "boolean")
                aValue.Value <<= OString(rValue.c_str()).toBoolean();
            else if (rType == "float")
                aValue.Value <<= OString(rValue.c_str()).toFloat();
            else if (rType == "long")
                aValue.Value <<= OString(rValue.c_str()).toInt32();
            else if (rType == "unsigned short")
                aValue.Value <<= static_cast<sal_uInt16>(OString(rValue.c_str()).toUInt32());
            else
                SAL_WARN("desktop.lib", "jsonToPropertyValuesVector: unhandled type '"<<rType<<"'");
            aArguments.push_back(aValue);
        }
    }
    return aArguments;
}

static boost::property_tree::ptree unoAnyToPropertyTree(const uno::Any& anyItem)
{
    boost::property_tree::ptree aTree;
    OUString aType = anyItem.getValueTypeName();
    aTree.put("type", aType.toUtf8().getStr());

    if (aType == "string")
        aTree.put("value", anyItem.get<OUString>().toUtf8().getStr());
    else if (aType == "unsigned long")
        aTree.put("value", OString::number(anyItem.get<sal_uInt32>()).getStr());
    else if (aType == "long")
        aTree.put("value", OString::number(anyItem.get<sal_Int32>()).getStr());

    // TODO: Add more as required

    return aTree;
}

namespace {

/// Represents an invalidated rectangle inside a given document part.
struct RectangleAndPart
{
    tools::Rectangle m_aRectangle;
    int m_nPart;

    RectangleAndPart()
        : m_nPart(INT_MIN)  // -1 is reserved to mean "all parts".
    {
    }

    OString toString() const
    {
        std::stringstream ss;
        ss << m_aRectangle.toString();
        if (m_nPart >= -1)
            ss << ", " << m_nPart;
        return ss.str().c_str();
    }

    /// Infinite Rectangle is both sides are
    /// equal or longer than SfxLokHelper::MaxTwips.
    bool isInfinite() const
    {
        return m_aRectangle.GetWidth() >= SfxLokHelper::MaxTwips &&
               m_aRectangle.GetHeight() >= SfxLokHelper::MaxTwips;
    }

    /// Empty Rectangle is when it has zero dimensions.
    bool isEmpty() const
    {
        return m_aRectangle.IsEmpty();
    }

    static RectangleAndPart Create(const std::string& rPayload)
    {
        RectangleAndPart aRet;
        if (rPayload.compare(0, 5, "EMPTY") == 0) // payload starts with "EMPTY"
        {
            aRet.m_aRectangle = tools::Rectangle(0, 0, SfxLokHelper::MaxTwips, SfxLokHelper::MaxTwips);
            if (comphelper::LibreOfficeKit::isPartInInvalidation())
                aRet.m_nPart = std::stol(rPayload.substr(6));

            return aRet;
        }

        std::istringstream aStream(rPayload);
        long nLeft, nTop, nWidth, nHeight;
        long nPart = INT_MIN;
        char nComma;
        if (comphelper::LibreOfficeKit::isPartInInvalidation())
        {
            aStream >> nLeft >> nComma >> nTop >> nComma >> nWidth >> nComma >> nHeight >> nComma >> nPart;
        }
        else
        {
            aStream >> nLeft >> nComma >> nTop >> nComma >> nWidth >> nComma >> nHeight;
        }

        if (nWidth > 0 && nHeight > 0)
        {
            // The top-left corner starts at (0, 0).
            // Anything negative is invalid.
            if (nLeft < 0)
            {
                nWidth += nLeft;
                nLeft = 0;
            }

            if (nTop < 0)
            {
                nHeight += nTop;
                nTop = 0;
            }

            if (nWidth > 0 && nHeight > 0)
            {
                aRet.m_aRectangle = tools::Rectangle(nLeft, nTop, nLeft + nWidth, nTop + nHeight);
            }
        }
        // else leave empty rect.

        aRet.m_nPart = nPart;
        return aRet;
    }
};

bool lcl_isViewCallbackType(const int type)
{
    switch (type)
    {
        case LOK_CALLBACK_CELL_VIEW_CURSOR:
        case LOK_CALLBACK_GRAPHIC_VIEW_SELECTION:
        case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR:
        case LOK_CALLBACK_TEXT_VIEW_SELECTION:
        case LOK_CALLBACK_VIEW_CURSOR_VISIBLE:
            return true;

        default:
            return false;
    }
}

int lcl_getViewId(const std::string& payload)
{
    // this is a cheap way how to get the viewId from a JSON message; proper
    // parsing is terribly expensive, and we just need the viewId here
    size_t viewIdPos = payload.find("viewId");
    if (viewIdPos == std::string::npos)
        return 0;

    size_t numberPos = payload.find(":", viewIdPos + 6);
    if (numberPos == std::string::npos)
        return 0;

    for (++numberPos; numberPos < payload.length(); ++numberPos)
    {
        if (payload[numberPos] == ',' || payload[numberPos] == '}' || (payload[numberPos] >= '0' && payload[numberPos] <= '9'))
            break;
    }

    if (numberPos < payload.length() && payload[numberPos] >= '0' && payload[numberPos] <= '9')
        return strtol(payload.substr(numberPos).c_str(), nullptr, 10);

    return 0;
}

}  // end anonymous namespace

// Could be anonymous in principle, but for the unit testing purposes, we
// declare it in init.hxx.
OUString desktop::extractParameter(OUString& rOptions, const OUString& rName)
{
    OUString aValue;

    OUString aNameEquals(rName + "=");
    OUString aCommaNameEquals("," + rName + "=");

    int nIndex = -1;
    if (rOptions.startsWith(aNameEquals))
    {
        size_t nLen = aNameEquals.getLength();
        int nComma = rOptions.indexOf(",", nLen);
        if (nComma >= 0)
        {
            aValue = rOptions.copy(nLen, nComma - nLen);
            rOptions = rOptions.copy(nComma + 1);
        }
        else
        {
            aValue = rOptions.copy(nLen);
            rOptions.clear();
        }
    }
    else if ((nIndex = rOptions.indexOf(aCommaNameEquals)) >= 0)
    {
        size_t nLen = aCommaNameEquals.getLength();
        int nComma = rOptions.indexOf(",", nIndex + nLen);
        if (nComma >= 0)
        {
            aValue = rOptions.copy(nIndex + nLen, nComma - nIndex - nLen);
            rOptions = rOptions.copy(0, nIndex) + rOptions.copy(nComma);
        }
        else
        {
            aValue = rOptions.copy(nIndex + nLen);
            rOptions = rOptions.copy(0, nIndex);
        }
    }

    return aValue;
}

extern "C"
{

static void doc_destroy(LibreOfficeKitDocument* pThis);
static int doc_saveAs(LibreOfficeKitDocument* pThis, const char* pUrl, const char* pFormat, const char* pFilterOptions);
static int doc_getDocumentType(LibreOfficeKitDocument* pThis);
static int doc_getParts(LibreOfficeKitDocument* pThis);
static char* doc_getPartPageRectangles(LibreOfficeKitDocument* pThis);
static int doc_getPart(LibreOfficeKitDocument* pThis);
static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart);
static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart);
static void doc_setPartMode(LibreOfficeKitDocument* pThis, int nPartMode);
static void doc_paintTile(LibreOfficeKitDocument* pThis,
                          unsigned char* pBuffer,
                          const int nCanvasWidth, const int nCanvasHeight,
                          const int nTilePosX, const int nTilePosY,
                          const int nTileWidth, const int nTileHeight);
static void doc_paintPartTile(LibreOfficeKitDocument* pThis,
                              unsigned char* pBuffer,
                              const int nPart,
                              const int nCanvasWidth, const int nCanvasHeight,
                              const int nTilePosX, const int nTilePosY,
                              const int nTileWidth, const int nTileHeight);
static int doc_getTileMode(LibreOfficeKitDocument* pThis);
static void doc_getDocumentSize(LibreOfficeKitDocument* pThis,
                                long* pWidth,
                                long* pHeight);
static void doc_initializeForRendering(LibreOfficeKitDocument* pThis,
                                       const char* pArguments);

static void doc_registerCallback(LibreOfficeKitDocument* pThis,
                                LibreOfficeKitCallback pCallback,
                                void* pData);
static void doc_postKeyEvent(LibreOfficeKitDocument* pThis,
                             int nType,
                             int nCharCode,
                             int nKeyCode);
static void doc_postWindowKeyEvent(LibreOfficeKitDocument* pThis,
                                   unsigned nLOKWindowId,
                                   int nType,
                                   int nCharCode,
                                   int nKeyCode);
static void doc_postMouseEvent (LibreOfficeKitDocument* pThis,
                                int nType,
                                int nX,
                                int nY,
                                int nCount,
                                int nButtons,
                                int nModifier);
static void doc_postWindowMouseEvent (LibreOfficeKitDocument* pThis,
                                      unsigned nLOKWindowId,
                                      int nType,
                                      int nX,
                                      int nY,
                                      int nCount,
                                      int nButtons,
                                      int nModifier);
static void doc_postUnoCommand(LibreOfficeKitDocument* pThis,
                               const char* pCommand,
                               const char* pArguments,
                               bool bNotifyWhenFinished);
static void doc_setTextSelection (LibreOfficeKitDocument* pThis,
                                  int nType,
                                  int nX,
                                  int nY);
static char* doc_getTextSelection(LibreOfficeKitDocument* pThis,
                                  const char* pMimeType,
                                  char** pUsedMimeType);
static bool doc_paste(LibreOfficeKitDocument* pThis,
                      const char* pMimeType,
                      const char* pData,
                      size_t nSize);
static void doc_setGraphicSelection (LibreOfficeKitDocument* pThis,
                                  int nType,
                                  int nX,
                                  int nY);
static void doc_resetSelection (LibreOfficeKitDocument* pThis);
static char* doc_getCommandValues(LibreOfficeKitDocument* pThis, const char* pCommand);
static void doc_setClientZoom(LibreOfficeKitDocument* pThis,
                                    int nTilePixelWidth,
                                    int nTilePixelHeight,
                                    int nTileTwipWidth,
                                    int nTileTwipHeight);
static void doc_setClientVisibleArea(LibreOfficeKitDocument* pThis, int nX, int nY, int nWidth, int nHeight);
static void doc_setOutlineState(LibreOfficeKitDocument* pThis, bool bColumn, int nLevel, int nIndex, bool bHidden);
static int doc_createView(LibreOfficeKitDocument* pThis);
static void doc_destroyView(LibreOfficeKitDocument* pThis, int nId);
static void doc_setView(LibreOfficeKitDocument* pThis, int nId);
static int doc_getView(LibreOfficeKitDocument* pThis);
static int doc_getViewsCount(LibreOfficeKitDocument* pThis);
static bool doc_getViewIds(LibreOfficeKitDocument* pThis, int* pArray, size_t nSize);
static void doc_setViewLanguage(LibreOfficeKitDocument* pThis, int nId, const char* language);
static unsigned char* doc_renderFont(LibreOfficeKitDocument* pThis,
                          const char *pFontName,
                          const char *pChar,
                          int* pFontWidth,
                          int* pFontHeight);
static char* doc_getPartHash(LibreOfficeKitDocument* pThis, int nPart);

static void doc_paintWindow(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, unsigned char* pBuffer,
                            const int nX, const int nY,
                            const int nWidth, const int nHeight);

static void doc_postWindow(LibreOfficeKitDocument* pThis, unsigned nLOKWindowId, int nAction);

LibLODocument_Impl::LibLODocument_Impl(const uno::Reference <css::lang::XComponent> &xComponent)
    : mxComponent(xComponent)
{
    if (!(m_pDocumentClass = gDocumentClass.lock()))
    {
        m_pDocumentClass.reset(new LibreOfficeKitDocumentClass);

        m_pDocumentClass->nSize = sizeof(LibreOfficeKitDocument);

        m_pDocumentClass->destroy = doc_destroy;
        m_pDocumentClass->saveAs = doc_saveAs;
        m_pDocumentClass->getDocumentType = doc_getDocumentType;
        m_pDocumentClass->getParts = doc_getParts;
        m_pDocumentClass->getPartPageRectangles = doc_getPartPageRectangles;
        m_pDocumentClass->getPart = doc_getPart;
        m_pDocumentClass->setPart = doc_setPart;
        m_pDocumentClass->getPartName = doc_getPartName;
        m_pDocumentClass->setPartMode = doc_setPartMode;
        m_pDocumentClass->paintTile = doc_paintTile;
        m_pDocumentClass->paintPartTile = doc_paintPartTile;
        m_pDocumentClass->getTileMode = doc_getTileMode;
        m_pDocumentClass->getDocumentSize = doc_getDocumentSize;
        m_pDocumentClass->initializeForRendering = doc_initializeForRendering;
        m_pDocumentClass->registerCallback = doc_registerCallback;
        m_pDocumentClass->postKeyEvent = doc_postKeyEvent;
        m_pDocumentClass->postWindowKeyEvent = doc_postWindowKeyEvent;
        m_pDocumentClass->postMouseEvent = doc_postMouseEvent;
        m_pDocumentClass->postWindowMouseEvent = doc_postWindowMouseEvent;
        m_pDocumentClass->postUnoCommand = doc_postUnoCommand;
        m_pDocumentClass->setTextSelection = doc_setTextSelection;
        m_pDocumentClass->getTextSelection = doc_getTextSelection;
        m_pDocumentClass->paste = doc_paste;
        m_pDocumentClass->setGraphicSelection = doc_setGraphicSelection;
        m_pDocumentClass->resetSelection = doc_resetSelection;
        m_pDocumentClass->getCommandValues = doc_getCommandValues;
        m_pDocumentClass->setClientZoom = doc_setClientZoom;
        m_pDocumentClass->setClientVisibleArea = doc_setClientVisibleArea;
        m_pDocumentClass->setOutlineState = doc_setOutlineState;

        m_pDocumentClass->createView = doc_createView;
        m_pDocumentClass->destroyView = doc_destroyView;
        m_pDocumentClass->setView = doc_setView;
        m_pDocumentClass->getView = doc_getView;
        m_pDocumentClass->getViewsCount = doc_getViewsCount;
        m_pDocumentClass->getViewIds = doc_getViewIds;

        m_pDocumentClass->renderFont = doc_renderFont;
        m_pDocumentClass->getPartHash = doc_getPartHash;

        m_pDocumentClass->paintWindow = doc_paintWindow;
        m_pDocumentClass->postWindow = doc_postWindow;

        m_pDocumentClass->setViewLanguage = doc_setViewLanguage;

        gDocumentClass = m_pDocumentClass;
    }
    pClass = m_pDocumentClass.get();
}

LibLODocument_Impl::~LibLODocument_Impl()
{
    mxComponent->dispose();
}

CallbackFlushHandler::CallbackFlushHandler(LibreOfficeKitDocument* pDocument, LibreOfficeKitCallback pCallback, void* pData)
    : Idle( "lokit timer callback" ),
      m_pDocument(pDocument),
      m_pCallback(pCallback),
      m_pData(pData),
      m_bPartTilePainting(false),
      m_bEventLatch(false)
{
    SetPriority(TaskPriority::POST_PAINT);

    // Add the states that are safe to skip duplicates on,
    // even when not consequent.
    m_states.emplace(LOK_CALLBACK_TEXT_SELECTION_START, "NIL");
    m_states.emplace(LOK_CALLBACK_TEXT_SELECTION_END, "NIL");
    m_states.emplace(LOK_CALLBACK_TEXT_SELECTION, "NIL");
    m_states.emplace(LOK_CALLBACK_GRAPHIC_SELECTION, "NIL");
    m_states.emplace(LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR, "NIL");
    m_states.emplace(LOK_CALLBACK_STATE_CHANGED, "NIL");
    m_states.emplace(LOK_CALLBACK_MOUSE_POINTER, "NIL");
    m_states.emplace(LOK_CALLBACK_CELL_CURSOR, "NIL");
    m_states.emplace(LOK_CALLBACK_CELL_FORMULA, "NIL");
    m_states.emplace(LOK_CALLBACK_CELL_ADDRESS, "NIL");
    m_states.emplace(LOK_CALLBACK_CURSOR_VISIBLE, "NIL");
    m_states.emplace(LOK_CALLBACK_SET_PART, "NIL");

    Start();
}

CallbackFlushHandler::~CallbackFlushHandler()
{
    Stop();
}

void CallbackFlushHandler::callback(const int type, const char* payload, void* data)
{
    CallbackFlushHandler* self = static_cast<CallbackFlushHandler*>(data);
    if (self)
    {
        self->queue(type, payload);
    }
}

void CallbackFlushHandler::queue(const int type, const char* data)
{
    std::string payload(data ? data : "(nil)");
    SAL_INFO("lok", "Queue: " << type << " : " << payload);

    if (m_bPartTilePainting)
    {
        // We drop notifications when this is set, except for important ones.
        // When we issue a complex command (such as .uno:InsertAnnotation)
        // there will be multiple notifications. On the first invalidation
        // we will start painting, but other events will get fired
        // while the complex command in question executes.
        // We don't want to suppress everything here on the wrong assumption
        // that no new events are fired during painting.
        if (type != LOK_CALLBACK_STATE_CHANGED &&
            type != LOK_CALLBACK_INVALIDATE_TILES &&
            type != LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR &&
            type != LOK_CALLBACK_CURSOR_VISIBLE &&
            type != LOK_CALLBACK_VIEW_CURSOR_VISIBLE &&
            type != LOK_CALLBACK_TEXT_SELECTION)
        {
            SAL_INFO("lok", "Skipping while painting [" << type << "]: [" << payload << "].");
            return;
        }

        // In Writer we drop all notifications during painting.
        if (doc_getDocumentType(m_pDocument) == LOK_DOCTYPE_TEXT)
            return;
    }

    // Suppress invalid payloads.
    if (type == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR &&
        payload.find(", 0, 0, ") != std::string::npos)
    {
        // The cursor position is often the relative coordinates of the widget
        // issuing it, instead of the absolute one that we expect.
        // This is temporary however, and, once the control is created and initialized
        // correctly, it eventually emits the correct absolute coordinates.
        SAL_INFO("lok", "Skipping invalid event [" << type << "]: [" << payload << "].");
        return;
    }

    std::unique_lock<std::mutex> lock(m_mutex);

    // drop duplicate callbacks for the listed types
    switch (type)
    {
        case LOK_CALLBACK_TEXT_SELECTION_START:
        case LOK_CALLBACK_TEXT_SELECTION_END:
        case LOK_CALLBACK_TEXT_SELECTION:
        case LOK_CALLBACK_GRAPHIC_SELECTION:
        case LOK_CALLBACK_GRAPHIC_VIEW_SELECTION:
        case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
        case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR :
        case LOK_CALLBACK_STATE_CHANGED:
        case LOK_CALLBACK_MOUSE_POINTER:
        case LOK_CALLBACK_CELL_CURSOR:
        case LOK_CALLBACK_CELL_VIEW_CURSOR:
        case LOK_CALLBACK_CELL_FORMULA:
        case LOK_CALLBACK_CELL_ADDRESS:
        case LOK_CALLBACK_CURSOR_VISIBLE:
        case LOK_CALLBACK_VIEW_CURSOR_VISIBLE:
        case LOK_CALLBACK_SET_PART:
        case LOK_CALLBACK_TEXT_VIEW_SELECTION:
        case LOK_CALLBACK_INVALIDATE_HEADER:
        case LOK_CALLBACK_WINDOW:
        {
            const auto& pos = std::find_if(m_queue.rbegin(), m_queue.rend(),
                    [type] (const queue_type::value_type& elem) { return (elem.first == type); });

            if (pos != m_queue.rend() && pos->second == payload)
            {
                SAL_INFO("lok", "Skipping queue duplicate [" << type << + "]: [" << payload << "].");
                return;
            }
        }
        break;
    }

    if (type == LOK_CALLBACK_TEXT_SELECTION && payload.empty())
    {
        const auto& posStart = std::find_if(m_queue.rbegin(), m_queue.rend(),
                [] (const queue_type::value_type& elem) { return (elem.first == LOK_CALLBACK_TEXT_SELECTION_START); });
        if (posStart != m_queue.rend())
            posStart->second = "";

        const auto& posEnd = std::find_if(m_queue.rbegin(), m_queue.rend(),
                [] (const queue_type::value_type& elem) { return (elem.first == LOK_CALLBACK_TEXT_SELECTION_END); });
        if (posEnd != m_queue.rend())
            posEnd->second = "";
    }

    // When payload is empty discards any previous state.
    if (payload.empty())
    {
        switch (type)
        {
            case LOK_CALLBACK_TEXT_SELECTION_START:
            case LOK_CALLBACK_TEXT_SELECTION_END:
            case LOK_CALLBACK_TEXT_SELECTION:
            case LOK_CALLBACK_GRAPHIC_SELECTION:
            case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
            case LOK_CALLBACK_INVALIDATE_TILES:
                SAL_INFO("lok", "Removing dups of [" << type << "]: [" << payload << "].");
                removeAll([type] (const queue_type::value_type& elem) { return (elem.first == type); });
            break;
        }
    }
    else
    {
        switch (type)
        {
            // These are safe to use the latest state and ignore previous
            // ones (if any) since the last overrides previous ones.
            case LOK_CALLBACK_TEXT_SELECTION_START:
            case LOK_CALLBACK_TEXT_SELECTION_END:
            case LOK_CALLBACK_TEXT_SELECTION:
            case LOK_CALLBACK_GRAPHIC_SELECTION:
            case LOK_CALLBACK_MOUSE_POINTER:
            case LOK_CALLBACK_CELL_CURSOR:
            case LOK_CALLBACK_CELL_FORMULA:
            case LOK_CALLBACK_CELL_ADDRESS:
            case LOK_CALLBACK_CURSOR_VISIBLE:
            case LOK_CALLBACK_SET_PART:
            case LOK_CALLBACK_STATUS_INDICATOR_SET_VALUE:
            case LOK_CALLBACK_RULER_UPDATE:
            {
                removeAll([type] (const queue_type::value_type& elem) { return (elem.first == type); });
            }
            break;

            // These are safe to use the latest state and ignore previous
            // ones (if any) since the last overrides previous ones,
            // but only if the view is the same.
            case LOK_CALLBACK_CELL_VIEW_CURSOR:
            case LOK_CALLBACK_GRAPHIC_VIEW_SELECTION:
            case LOK_CALLBACK_INVALIDATE_VIEW_CURSOR:
            case LOK_CALLBACK_TEXT_VIEW_SELECTION:
            case LOK_CALLBACK_VIEW_CURSOR_VISIBLE:
            {
                const int nViewId = lcl_getViewId(payload);
                removeAll(
                    [type, nViewId] (const queue_type::value_type& elem) {
                        return (elem.first == type && nViewId == lcl_getViewId(elem.second));
                    }
                );
            }
            break;

            case LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR:
            {
                removeAll(
                    [type, &payload] (const queue_type::value_type& elem) {
                        return (elem.first == type && elem.second == payload);
                    }
                );
            }
            break;

            case LOK_CALLBACK_INVALIDATE_TILES:
            {
                RectangleAndPart rcNew = RectangleAndPart::Create(payload);
                if (rcNew.isEmpty())
                {
                    SAL_INFO("lok", "Skipping invalid event [" << type << "]: [" << payload << "].");
                    return;
                }

                // If we have to invalidate all tiles, we can skip any new tile invalidation.
                // Find the last INVALIDATE_TILES entry, if any to see if it's invalidate-all.
                const auto& pos = std::find_if(m_queue.rbegin(), m_queue.rend(),
                        [] (const queue_type::value_type& elem) { return (elem.first == LOK_CALLBACK_INVALIDATE_TILES); });
                if (pos != m_queue.rend())
                {
                    RectangleAndPart rcOld = RectangleAndPart::Create(pos->second);
                    if (rcOld.isInfinite() && (rcOld.m_nPart == -1 || rcOld.m_nPart == rcNew.m_nPart))
                    {
                        SAL_INFO("lok", "Skipping queue [" << type << "]: [" << payload << "] since all tiles need to be invalidated.");
                        return;
                    }

                    if (rcOld.m_nPart == -1 || rcOld.m_nPart == rcNew.m_nPart)
                    {
                        // If fully overlapping.
                        if (rcOld.m_aRectangle.IsInside(rcNew.m_aRectangle))
                        {
                            SAL_INFO("lok", "Skipping queue [" << type << "]: [" << payload << "] since overlaps existing all-parts.");
                            return;
                        }
                    }
                }

                if (rcNew.isInfinite())
                {
                    SAL_INFO("lok", "Have Empty [" << type << "]: [" << payload << "] so removing all with part " << rcNew.m_nPart << ".");
                    removeAll(
                        [&rcNew] (const queue_type::value_type& elem) {
                            if (elem.first == LOK_CALLBACK_INVALIDATE_TILES)
                            {
                                // Remove exiting if new is all-encompassing, or if of the same part.
                                const RectangleAndPart rcOld = RectangleAndPart::Create(elem.second);
                                return (rcNew.m_nPart == -1 || rcOld.m_nPart == rcNew.m_nPart);
                            }

                            // Keep others.
                            return false;
                        }
                    );
                }
                else
                {
                    const auto rcOrig = rcNew;

                    SAL_INFO("lok", "Have [" << type << "]: [" << payload << "] so merging overlapping.");
                    removeAll(
                        [&rcNew] (const queue_type::value_type& elem) {
                            if (elem.first == LOK_CALLBACK_INVALIDATE_TILES)
                            {
                                const RectangleAndPart rcOld = RectangleAndPart::Create(elem.second);
                                if (rcNew.m_nPart != -1 && rcOld.m_nPart != -1 && rcOld.m_nPart != rcNew.m_nPart)
                                {
                                    SAL_INFO("lok", "Nothing to merge between new: " << rcNew.toString() << ", and old: " << rcOld.toString());
                                    return false;
                                }

                                if (rcNew.m_nPart == -1)
                                {
                                    // Don't merge unless fully overlaped.
                                    SAL_INFO("lok", "New " << rcNew.toString() << " has " << rcOld.toString() << "?");
                                    if (rcNew.m_aRectangle.IsInside(rcOld.m_aRectangle))
                                    {
                                        SAL_INFO("lok", "New " << rcNew.toString() << " engulfs old " << rcOld.toString() << ".");
                                        return true;
                                    }
                                }
                                else if (rcOld.m_nPart == -1)
                                {
                                    // Don't merge unless fully overlaped.
                                    SAL_INFO("lok", "Old " << rcOld.toString() << " has " << rcNew.toString() << "?");
                                    if (rcOld.m_aRectangle.IsInside(rcNew.m_aRectangle))
                                    {
                                        SAL_INFO("lok", "New " << rcNew.toString() << " engulfs old " << rcOld.toString() << ".");
                                        return true;
                                    }
                                }
                                else
                                {
                                    const tools::Rectangle rcOverlap = rcNew.m_aRectangle.GetIntersection(rcOld.m_aRectangle);
                                    const bool bOverlap = !rcOverlap.IsEmpty();
                                    SAL_INFO("lok", "Merging " << rcNew.toString() << " & " << rcOld.toString() << " => " <<
                                            rcOverlap.toString() << " Overlap: " << bOverlap);
                                    if (bOverlap)
                                    {
                                        rcNew.m_aRectangle.Union(rcOld.m_aRectangle);
                                        SAL_INFO("lok", "Merged: " << rcNew.toString());
                                        return true;
                                    }
                                }
                            }

                            // Keep others.
                            return false;
                        }
                    );

                    if (rcNew.m_aRectangle != rcOrig.m_aRectangle)
                    {
                        SAL_INFO("lok", "Replacing: " << rcOrig.toString() << " by " << rcNew.toString());
                        if (rcNew.m_aRectangle.GetWidth() < rcOrig.m_aRectangle.GetWidth() ||
                            rcNew.m_aRectangle.GetHeight() < rcOrig.m_aRectangle.GetHeight())
                        {
                            SAL_WARN("lok", "Error: merged rect smaller.");
                        }
                    }
                }

                payload = rcNew.toString().getStr();
            }
            break;

            // State changes with same name override previous ones with a different value.
            // Ex. ".uno:PageStatus=Slide 20 of 83" overwrites any previous PageStatus.
            case LOK_CALLBACK_STATE_CHANGED:
            {
                // Compare the state name=value and overwrite earlier entries with same name.
                const auto pos = payload.find('=');
                if (pos != std::string::npos)
                {
                    const std::string name = payload.substr(0, pos + 1);
                    removeAll(
                        [type, &name] (const queue_type::value_type& elem) {
                            return (elem.first == type) && (elem.second.compare(0, name.size(), name) == 0);
                        }
                    );
                }
            }
            break;

            case LOK_CALLBACK_WINDOW:
            {
                // reading JSON by boost might be slow?
                boost::property_tree::ptree aTree;
                std::stringstream aStream(payload);
                boost::property_tree::read_json(aStream, aTree);
                const unsigned nLOKWindowId = aTree.get<unsigned>("id", 0);
                if (aTree.get<std::string>("action", "") == "invalidate")
                {
                    std::string aRectStr = aTree.get<std::string>("rectangle", "");
                    // no 'rectangle' field => invalidate all of the window =>
                    // remove all previous window part invalidations
                    if (aRectStr.empty())
                    {
                        removeAll([&nLOKWindowId] (const queue_type::value_type& elem) {
                                if (elem.first == LOK_CALLBACK_WINDOW)
                                {
                                    boost::property_tree::ptree aOldTree;
                                    std::stringstream aOldStream(elem.second);
                                    boost::property_tree::read_json(aOldStream, aOldTree);
                                    const unsigned nOldDialogId = aOldTree.get<unsigned>("id", 0);
                                    if (aOldTree.get<std::string>("action", "") == "invalidate" &&
                                        nLOKWindowId == nOldDialogId)
                                    {
                                        return true;
                                    }
                                }
                                return false;
                            });
                    }
                    else
                    {
                        // if we have to invalidate all of the window, ignore
                        // any part invalidation message
                        const auto& pos = std::find_if(m_queue.rbegin(), m_queue.rend(),
                                                       [&nLOKWindowId] (const queue_type::value_type& elem)
                                                       {
                                                           if (elem.first != LOK_CALLBACK_WINDOW)
                                                               return false;

                                                           boost::property_tree::ptree aOldTree;
                                                           std::stringstream aOldStream(elem.second);
                                                           boost::property_tree::read_json(aOldStream, aOldTree);
                                                           const unsigned nOldDialogId = aOldTree.get<unsigned>("id", 0);
                                                           if (aOldTree.get<std::string>("action", "") == "invalidate" &&
                                                               nLOKWindowId == nOldDialogId &&
                                                               aOldTree.get<std::string>("rectangle", "").empty())
                                                           {
                                                               return true;
                                                           }
                                                           return false;
                                                       });

                        // we found a invalidate-all window callback
                        if (pos != m_queue.rend())
                        {
                            SAL_INFO("lok.dialog", "Skipping queue [" << type << "]: [" << payload << "] since whole window needs to be invalidated.");
                            return;
                        }

                        std::istringstream aRectStream(aRectStr);
                        long nLeft, nTop, nWidth, nHeight;
                        char nComma;
                        aRectStream >> nLeft >> nComma >> nTop >> nComma >> nWidth >> nComma >> nHeight;
                        tools::Rectangle aNewRect = tools::Rectangle(nLeft, nTop, nLeft + nWidth, nTop + nHeight);
                        bool currentIsRedundant = false;
                        removeAll([&aNewRect, &nLOKWindowId, &currentIsRedundant] (const queue_type::value_type& elem) {
                                if (elem.first != LOK_CALLBACK_WINDOW)
                                    return false;

                                boost::property_tree::ptree aOldTree;
                                std::stringstream aOldStream(elem.second);
                                boost::property_tree::read_json(aOldStream, aOldTree);
                                if (aOldTree.get<std::string>("action", "") == "invalidate")
                                {
                                    const unsigned nOldDialogId = aOldTree.get<unsigned>("id", 0);
                                    std::string aOldRectStr = aOldTree.get<std::string>("rectangle", "");
                                    // not possible that we encounter an empty
                                    // rectangle here; we already handled this
                                    // case before
                                    std::istringstream aOldRectStream(aOldRectStr);
                                    long nOldLeft, nOldTop, nOldWidth, nOldHeight;
                                    char nOldComma;
                                    aOldRectStream >> nOldLeft >> nOldComma >> nOldTop >> nOldComma >> nOldWidth >> nOldComma >> nOldHeight;
                                    tools::Rectangle aOldRect = tools::Rectangle(nOldLeft, nOldTop, nOldLeft + nOldWidth, nOldTop + nOldHeight);

                                    if (nLOKWindowId == nOldDialogId)
                                    {
                                        // new one engulfs the old one?
                                        if (aNewRect.IsInside(aOldRect))
                                        {
                                            SAL_INFO("lok.dialog", "New " << aNewRect.toString() << " engulfs old " << aOldRect.toString() << ".");
                                            return true;
                                        }
                                        // old one engulfs the new one?
                                        else if (aOldRect.IsInside(aNewRect))
                                        {
                                            SAL_INFO("lok.dialog", "Old " << aOldRect.toString() << " engulfs new " << aNewRect.toString() << ".");
                                            // we have a rectangle in the queue
                                            // already that makes the current
                                            // Callback useless
                                            currentIsRedundant = true;
                                            return false;
                                        }
                                        else
                                        {
                                            SAL_INFO("lok.dialog", "Merging " << aNewRect.toString() << " & " << aOldRect.toString());
                                            aNewRect.Union(aOldRect);
                                            SAL_INFO("lok.dialog", "Merged: " << aNewRect.toString());
                                            return true;
                                        }
                                    }
                                }

                                // keep rest
                                return false;
                            });

                        if (currentIsRedundant)
                        {
                            SAL_INFO("lok.dialog", "Current payload is engulfed by one already in the queue. Skipping redundant payload: " << aNewRect.toString());
                            return;
                        }

                        aTree.put("rectangle", aNewRect.toString().getStr());
                        std::stringstream aJSONStream;
                        boost::property_tree::write_json(aJSONStream, aTree);
                        payload = aJSONStream.str();
                    }
                }
            }
            break;
        }
    }

    m_queue.emplace_back(type, payload);
    SAL_INFO("lok", "Queued #" << (m_queue.size() - 1) <<
             " [" << type << "]: [" << payload << "] to have " << m_queue.size() << " entries.");

    lock.unlock();
    if (!IsActive())
    {
        Start();
    }
}

void CallbackFlushHandler::Invoke()
{
    if (m_pCallback && !m_bEventLatch)
    {
        std::unique_lock<std::mutex> lock(m_mutex);

        SAL_INFO("lok", "Flushing " << m_queue.size() << " elements.");
        for (auto& pair : m_queue)
        {
            const int type = pair.first;
            const auto& payload = pair.second;
            const int viewId = lcl_isViewCallbackType(type) ? lcl_getViewId(payload) : -1;

            if (viewId == -1)
            {
                const auto stateIt = m_states.find(type);
                if (stateIt != m_states.end())
                {
                    // If the state didn't change, it's safe to ignore.
                    if (stateIt->second == payload)
                    {
                        SAL_INFO("lok", "Skipping duplicate [" << type << "]: [" << payload << "].");
                        continue;
                    }

                    stateIt->second = payload;
                }
            }
            else
            {
                const auto statesIt = m_viewStates.find(viewId);
                if (statesIt != m_viewStates.end())
                {
                    auto& states = statesIt->second;
                    const auto stateIt = states.find(type);
                    if (stateIt != states.end())
                    {
                        // If the state didn't change, it's safe to ignore.
                        if (stateIt->second == payload)
                        {
                            SAL_INFO("lok", "Skipping view duplicate [" << type << ',' << viewId << "]: [" << payload << "].");
                            continue;
                        }

                        SAL_INFO("lok", "Replacing an element in view states [" << type << ',' << viewId << "]: [" << payload << "].");
                        stateIt->second = payload;
                    }
                    else
                    {
                        SAL_INFO("lok", "Inserted a new element in view states: [" << type << ',' << viewId << "]: [" << payload << "]");
                        states.emplace(type, payload);

                    }
                }
            }

            m_pCallback(type, payload.c_str(), m_pData);
        }

        m_queue.clear();
    }
}

void CallbackFlushHandler::removeAll(const std::function<bool (const CallbackFlushHandler::queue_type::value_type&)>& rTestFunc)
{
    auto newEnd = std::remove_if(m_queue.begin(), m_queue.end(), rTestFunc);
    m_queue.erase(newEnd, m_queue.end());
}

void CallbackFlushHandler::addViewStates(int viewId)
{
    const auto& result = m_viewStates.emplace(viewId, decltype(m_viewStates)::mapped_type());
    if (!result.second && result.first != m_viewStates.end())
    {
        result.first->second.clear();
    }
}

void CallbackFlushHandler::removeViewStates(int viewId)
{
    m_viewStates.erase(viewId);
}


static void doc_destroy(LibreOfficeKitDocument *pThis)
{
    SolarMutexGuard aGuard;

    LibLODocument_Impl *pDocument = static_cast<LibLODocument_Impl*>(pThis);
    delete pDocument;
}

static void                    lo_destroy       (LibreOfficeKit* pThis);
static int                     lo_initialize    (LibreOfficeKit* pThis, const char* pInstallPath, const char* pUserProfilePath);
static LibreOfficeKitDocument* lo_documentLoad  (LibreOfficeKit* pThis, const char* pURL);
static char *                  lo_getError      (LibreOfficeKit* pThis);
static void                    lo_freeError     (char* pFree);
static LibreOfficeKitDocument* lo_documentLoadWithOptions  (LibreOfficeKit* pThis,
                                                           const char* pURL,
                                                           const char* pOptions);
static void                    lo_registerCallback (LibreOfficeKit* pThis,
                                                    LibreOfficeKitCallback pCallback,
                                                    void* pData);
static char* lo_getFilterTypes(LibreOfficeKit* pThis);
static void                    lo_setOptionalFeatures(LibreOfficeKit* pThis, unsigned long long features);
static void                    lo_setDocumentPassword(LibreOfficeKit* pThis,
                                                       const char* pURL,
                                                       const char* pPassword);
static char*                   lo_getVersionInfo(LibreOfficeKit* pThis);
static int                     lo_runMacro      (LibreOfficeKit* pThis, const char* pURL);

LibLibreOffice_Impl::LibLibreOffice_Impl()
    : m_pOfficeClass( gOfficeClass.lock() )
    , maThread(nullptr)
    , mpCallback(nullptr)
    , mpCallbackData(nullptr)
    , mOptionalFeatures(0)
{
    if(!m_pOfficeClass) {
        m_pOfficeClass.reset(new LibreOfficeKitClass);
        m_pOfficeClass->nSize = sizeof(LibreOfficeKitClass);

        m_pOfficeClass->destroy = lo_destroy;
        m_pOfficeClass->documentLoad = lo_documentLoad;
        m_pOfficeClass->getError = lo_getError;
        m_pOfficeClass->freeError = lo_freeError;
        m_pOfficeClass->documentLoadWithOptions = lo_documentLoadWithOptions;
        m_pOfficeClass->registerCallback = lo_registerCallback;
        m_pOfficeClass->getFilterTypes = lo_getFilterTypes;
        m_pOfficeClass->setOptionalFeatures = lo_setOptionalFeatures;
        m_pOfficeClass->setDocumentPassword = lo_setDocumentPassword;
        m_pOfficeClass->getVersionInfo = lo_getVersionInfo;
        m_pOfficeClass->runMacro = lo_runMacro;

        gOfficeClass = m_pOfficeClass;
    }

    pClass = m_pOfficeClass.get();
}

LibLibreOffice_Impl::~LibLibreOffice_Impl()
{
}

namespace
{

ITiledRenderable* getTiledRenderable(LibreOfficeKitDocument* pThis)
{
    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
    return dynamic_cast<ITiledRenderable*>(pDocument->mxComponent.get());
}

} // anonymous namespace

// Wonder global state ...
static uno::Reference<css::uno::XComponentContext> xContext;
static uno::Reference<css::lang::XMultiServiceFactory> xSFactory;
static uno::Reference<css::lang::XMultiComponentFactory> xFactory;

static LibreOfficeKitDocument* lo_documentLoad(LibreOfficeKit* pThis, const char* pURL)
{
    return lo_documentLoadWithOptions(pThis, pURL, nullptr);
}

static LibreOfficeKitDocument* lo_documentLoadWithOptions(LibreOfficeKit* pThis, const char* pURL, const char* pOptions)
{
    SolarMutexGuard aGuard;

    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);

    OUString aURL(getAbsoluteURL(pURL));
    if (aURL.isEmpty())
    {
        pLib->maLastExceptionMsg = "Filename to load was not provided.";
        SAL_INFO("lok", "URL for load is empty");
        return nullptr;
    }

    pLib->maLastExceptionMsg.clear();

    if (!xContext.is())
    {
        pLib->maLastExceptionMsg = "ComponentContext is not available";
        SAL_INFO("lok", "ComponentContext is not available");
        return nullptr;
    }

    uno::Reference<frame::XDesktop2> xComponentLoader = frame::Desktop::create(xContext);

    if (!xComponentLoader.is())
    {
        pLib->maLastExceptionMsg = "ComponentLoader is not available";
        SAL_INFO("lok", "ComponentLoader is not available");
        return nullptr;
    }

    try
    {
        // 'Language=...' is an option that LOK consumes by itself, and does
        // not pass it as a parameter to the filter
        OUString aOptions = getUString(pOptions);
        OUString aLanguage = extractParameter(aOptions, "Language");

        if (!aLanguage.isEmpty())
        {
            // use with care - it sets it for the entire core, not just the
            // document
            SvtSysLocaleOptions aSysLocaleOptions;
            aSysLocaleOptions.SetLocaleConfigString(aLanguage);
            aSysLocaleOptions.SetUILocaleConfigString(aLanguage);
        }

        uno::Sequence<css::beans::PropertyValue> aFilterOptions(2);
        aFilterOptions[0] = css::beans::PropertyValue( "FilterOptions",
                                                       0,
                                                       uno::makeAny(aOptions),
                                                       beans::PropertyState_DIRECT_VALUE);

        rtl::Reference<LOKInteractionHandler> const pInteraction(
            new LOKInteractionHandler("load", pLib));
        auto const pair(pLib->mInteractionMap.insert(std::make_pair(aURL.toUtf8(), pInteraction)));
        comphelper::ScopeGuard const g([&] () {
                if (pair.second)
                {
                    pLib->mInteractionMap.erase(aURL.toUtf8());
                }
            });
        uno::Reference<task::XInteractionHandler2> const xInteraction(pInteraction.get());
        aFilterOptions[1].Name = "InteractionHandler";
        aFilterOptions[1].Value <<= xInteraction;

        /* TODO
        sal_Int16 nMacroExecMode = document::MacroExecMode::USE_CONFIG;
        aFilterOptions[2].Name = "MacroExecutionMode";
        aFilterOptions[2].Value <<= nMacroExecMode;

        sal_Int16 nUpdateDoc = document::UpdateDocMode::ACCORDING_TO_CONFIG;
        aFilterOptions[3].Name = "UpdateDocMode";
        aFilterOptions[3].Value <<= nUpdateDoc;
        */

        uno::Reference<lang::XComponent> xComponent;
        xComponent = xComponentLoader->loadComponentFromURL(
                                            aURL, "_blank", 0,
                                            aFilterOptions);

        assert(!xComponent.is() || pair.second); // concurrent loading of same URL ought to fail

        if (!xComponent.is())
        {
            pLib->maLastExceptionMsg = "loadComponentFromURL returned an empty reference";
            SAL_INFO("lok", "Document can't be loaded - " << pLib->maLastExceptionMsg);
            return nullptr;
        }

        return new LibLODocument_Impl(xComponent);

    }
    catch (const uno::Exception& exception)
    {
        pLib->maLastExceptionMsg = exception.Message;
        SAL_INFO("lok", "Document can't be loaded: " << exception);
    }

    return nullptr;
}

static int lo_runMacro(LibreOfficeKit* pThis, const char *pURL)
{
    SolarMutexGuard aGuard;

    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);

    OUString sURL( pURL, strlen(pURL), RTL_TEXTENCODING_UTF8 );
    if (sURL.isEmpty())
    {
        pLib->maLastExceptionMsg = "Macro to run was not provided.";
        SAL_INFO("lok", "Macro URL is empty");
        return false;
    }

    if (!sURL.startsWith("macro://"))
    {
        pLib->maLastExceptionMsg = "This doesn't look like macro URL";
        SAL_INFO("lok", "Macro URL is invalid");
        return false;
    }

    pLib->maLastExceptionMsg.clear();

    if (!xContext.is())
    {
        pLib->maLastExceptionMsg = "ComponentContext is not available";
        SAL_INFO("lok", "ComponentContext is not available");
        return false;
    }

    util::URL aURL;
    aURL.Complete = sURL;

    uno::Reference < util::XURLTransformer > xParser( util::URLTransformer::create( xContext ) );

    if( xParser.is() )
        xParser->parseStrict( aURL );

    uno::Reference<frame::XDesktop2> xComponentLoader = frame::Desktop::create(xContext);

    if (!xComponentLoader.is())
    {
        pLib->maLastExceptionMsg = "ComponentLoader is not available";
        SAL_INFO("lok", "ComponentLoader is not available");
        return false;
    }

    xFactory = xContext->getServiceManager();

    if (xFactory.is())
    {
        uno::Reference<frame::XDispatchProvider> xDP;
        xSFactory.set(xFactory, uno::UNO_QUERY_THROW);
        xDP.set( xSFactory->createInstance("com.sun.star.comp.sfx2.SfxMacroLoader"), uno::UNO_QUERY );
        uno::Reference<frame::XDispatch> xD = xDP->queryDispatch( aURL, OUString(), 0);

        if (!xD.is())
        {
            pLib->maLastExceptionMsg = "Macro loader is not available";
            SAL_INFO("lok", "Macro loader is not available");
            return false;
        }

        uno::Reference < frame::XSynchronousDispatch > xSyncDisp( xD, uno::UNO_QUERY_THROW );
        uno::Sequence<css::beans::PropertyValue> aEmpty;
        css::beans::PropertyValue aErr;
        uno::Any aRet;

        aRet = xSyncDisp->dispatchWithReturnValue( aURL, aEmpty );
        aRet >>= aErr;

        if (aErr.Name == "ErrorCode")
        {
            sal_uInt32 nErrCode = 0; // ERRCODE_NONE
            aErr.Value >>= nErrCode;

            pLib->maLastExceptionMsg = "An error occurred running macro (error code: " + OUString::number( nErrCode ) + ")";
            SAL_INFO("lok", "Macro execution terminated with error code " << nErrCode);

            return false;
        }

        return true;
    }

    return false;
}

static void lo_registerCallback (LibreOfficeKit* pThis,
                                 LibreOfficeKitCallback pCallback,
                                 void* pData)
{
    SolarMutexGuard aGuard;

    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);

    pLib->mpCallback = pCallback;
    pLib->mpCallbackData = pData;
}

static int doc_saveAs(LibreOfficeKitDocument* pThis, const char* sUrl, const char* pFormat, const char* pFilterOptions)
{
    SolarMutexGuard aGuard;

    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    OUString sFormat = getUString(pFormat);
    OUString aURL(getAbsoluteURL(sUrl));
    if (aURL.isEmpty())
    {
        gImpl->maLastExceptionMsg = "Filename to save to was not provided.";
        SAL_INFO("lok", "URL for save is empty");
        return false;
    }

    try
    {
        const ExtensionMap* pMap;

        switch (doc_getDocumentType(pThis))
        {
        case LOK_DOCTYPE_SPREADSHEET:
            pMap = aCalcExtensionMap;
            break;
        case LOK_DOCTYPE_PRESENTATION:
            pMap = aImpressExtensionMap;
            break;
        case LOK_DOCTYPE_DRAWING:
            pMap = aDrawExtensionMap;
            break;
        case LOK_DOCTYPE_TEXT:
            pMap = aWriterExtensionMap;
            break;
        case LOK_DOCTYPE_OTHER:
        default:
            SAL_INFO("lok", "Can't save document - unsupported document type.");
            return false;
        }

        if (pFormat == nullptr)
        {
            // sniff from the extension
            sal_Int32 idx = aURL.lastIndexOf(".");
            if( idx > 0 )
            {
                sFormat = aURL.copy( idx + 1 );
            }
            else
            {
                gImpl->maLastExceptionMsg = "input filename without a suffix";
                return false;
            }
        }

        OUString aFilterName;
        for (sal_Int32 i = 0; pMap[i].extn; ++i)
        {
            if (sFormat.equalsIgnoreAsciiCaseAscii(pMap[i].extn))
            {
                aFilterName = getUString(pMap[i].filterName);
                break;
            }
        }
        if (aFilterName.isEmpty())
        {
            gImpl->maLastExceptionMsg = "no output filter found for provided suffix";
            return false;
        }

        OUString aFilterOptions = getUString(pFilterOptions);

        // 'TakeOwnership' == this is a 'real' SaveAs (that is, the document
        // gets a new name).  When this is not provided, the meaning of
        // saveAs() is more like save-a-copy, which allows saving to any
        // random format like PDF or PNG.
        // It is not a real filter option, so we have to filter it out.
        bool bTakeOwnership = false;
        int nIndex = -1;
        if (aFilterOptions == "TakeOwnership")
        {
            bTakeOwnership = true;
            aFilterOptions.clear();
        }
        else if ((nIndex = aFilterOptions.indexOf(",TakeOwnership")) >= 0 || (nIndex = aFilterOptions.indexOf("TakeOwnership,")) >= 0)
        {
            OUString aFiltered;
            if (nIndex > 0)
                aFiltered = aFilterOptions.copy(0, nIndex);
            if (nIndex + 14 < aFilterOptions.getLength())
                aFiltered = aFiltered + aFilterOptions.copy(nIndex + 14);

            bTakeOwnership = true;
            aFilterOptions = aFiltered;
        }

        MediaDescriptor aSaveMediaDescriptor;
        aSaveMediaDescriptor["Overwrite"] <<= true;
        aSaveMediaDescriptor["FilterName"] <<= aFilterName;
        aSaveMediaDescriptor[MediaDescriptor::PROP_FILTEROPTIONS()] <<= aFilterOptions;

        // add interaction handler too
        if (gImpl)
        {
            // gImpl does not have to exist when running from a unit test
            rtl::Reference<LOKInteractionHandler> const pInteraction(
                    new LOKInteractionHandler("saveas", gImpl, pDocument));
            uno::Reference<task::XInteractionHandler2> const xInteraction(pInteraction.get());

            aSaveMediaDescriptor[MediaDescriptor::PROP_INTERACTIONHANDLER()] <<= xInteraction;
        }

        uno::Reference<frame::XStorable> xStorable(pDocument->mxComponent, uno::UNO_QUERY_THROW);

        if (bTakeOwnership)
            xStorable->storeAsURL(aURL, aSaveMediaDescriptor.getAsConstPropertyValueList());
        else
            xStorable->storeToURL(aURL, aSaveMediaDescriptor.getAsConstPropertyValueList());

        return true;
    }
    catch (const uno::Exception& exception)
    {
        gImpl->maLastExceptionMsg = "exception: " + exception.Message;
    }
    return false;
}

static void doc_iniUnoCommands ()
{
    SolarMutexGuard aGuard;

    OUString sUnoCommands[] =
    {
        OUString(".uno:AlignLeft"),
        OUString(".uno:AlignHorizontalCenter"),
        OUString(".uno:AlignRight"),
        OUString(".uno:BackColor"),
        OUString(".uno:BackgroundColor"),
        OUString(".uno:Bold"),
        OUString(".uno:CenterPara"),
        OUString(".uno:CharBackColor"),
        OUString(".uno:CharBackgroundExt"),
        OUString(".uno:CharFontName"),
        OUString(".uno:Color"),
        OUString(".uno:ControlCodes"),
        OUString(".uno:DecrementIndent"),
        OUString(".uno:DefaultBullet"),
        OUString(".uno:DefaultNumbering"),
        OUString(".uno:FontColor"),
        OUString(".uno:FontHeight"),
        OUString(".uno:IncrementIndent"),
        OUString(".uno:Italic"),
        OUString(".uno:JustifyPara"),
        OUString(".uno:OutlineFont"),
        OUString(".uno:LeftPara"),
        OUString(".uno:LanguageStatus"),
        OUString(".uno:RightPara"),
        OUString(".uno:Shadowed"),
        OUString(".uno:SubScript"),
        OUString(".uno:SuperScript"),
        OUString(".uno:Strikeout"),
        OUString(".uno:StyleApply"),
        OUString(".uno:Underline"),
        OUString(".uno:ModifiedStatus"),
        OUString(".uno:Undo"),
        OUString(".uno:Redo"),
        OUString(".uno:InsertPage"),
        OUString(".uno:DeletePage"),
        OUString(".uno:DuplicatePage"),
        OUString(".uno:Cut"),
        OUString(".uno:Copy"),
        OUString(".uno:Paste"),
        OUString(".uno:SelectAll"),
        OUString(".uno:InsertAnnotation"),
        OUString(".uno:DeleteAnnotation"),
        OUString(".uno:ReplyComment"),
        OUString(".uno:InsertRowsBefore"),
        OUString(".uno:InsertRowsAfter"),
        OUString(".uno:InsertColumnsBefore"),
        OUString(".uno:InsertColumnsAfter"),
        OUString(".uno:DeleteRows"),
        OUString(".uno:DeleteColumns"),
        OUString(".uno:DeleteTable"),
        OUString(".uno:SelectTable"),
        OUString(".uno:EntireRow"),
        OUString(".uno:EntireColumn"),
        OUString(".uno:EntireCell"),
        OUString(".uno:AssignLayout"),
        OUString(".uno:StatusDocPos"),
        OUString(".uno:RowColSelCount"),
        OUString(".uno:StatusPageStyle"),
        OUString(".uno:InsertMode"),
        OUString(".uno:SpellOnline"),
        OUString(".uno:StatusSelectionMode"),
        OUString(".uno:StateTableCell"),
        OUString(".uno:StatusBarFunc"),
        OUString(".uno:StatePageNumber"),
        OUString(".uno:StateWordCount"),
        OUString(".uno:SelectionMode"),
        OUString(".uno:PageStatus"),
        OUString(".uno:LayoutStatus"),
        OUString(".uno:Context"),
        OUString(".uno:WrapText"),
        OUString(".uno:ToggleMergeCells"),
        OUString(".uno:NumberFormatCurrency"),
        OUString(".uno:NumberFormatPercent"),
        OUString(".uno:NumberFormatDate"),
        OUString(".uno:SortAscending"),
        OUString(".uno:SortDescending"),
        OUString(".uno:TrackChanges"),
        OUString(".uno:ShowTrackedChanges"),
        OUString(".uno:NextTrackedChange"),
        OUString(".uno:PreviousTrackedChange"),
        OUString(".uno:AcceptAllTrackedChanges"),
        OUString(".uno:RejectAllTrackedChanges"),
        OUString(".uno:TableDialog"),
        OUString(".uno:FormatCellDialog"),
        OUString(".uno:FontDialog"),
        OUString(".uno:ParagraphDialog"),
        OUString(".uno:OutlineBullet"),
        OUString(".uno:InsertIndexesEntry"),
        OUString(".uno:DocumentRepair"),
        OUString(".uno:InsertPageHeader"),
        OUString(".uno:InsertPageFooter")
    };

    util::URL aCommandURL;
    SfxViewShell* pViewShell = SfxViewShell::Current();
    SfxViewFrame* pViewFrame = pViewShell? pViewShell->GetViewFrame(): nullptr;

    // check if Frame-Controller were created.
    if (!pViewShell && !pViewFrame)
    {
        SAL_WARN("lok", "iniUnoCommands: No Frame-Controller created.");
        return;
    }

    if (!xContext.is())
        xContext = comphelper::getProcessComponentContext();
    if (!xContext.is())
    {
        SAL_WARN("lok", "iniUnoCommands: Component context is not available");
        return;
    }

    SfxSlotPool& rSlotPool = SfxSlotPool::GetSlotPool(pViewFrame);
    uno::Reference<util::XURLTransformer> xParser(util::URLTransformer::create(xContext));

    for (const auto & sUnoCommand : sUnoCommands)
    {
        const SfxSlot* pSlot = nullptr;

        aCommandURL.Complete = sUnoCommand;
        xParser->parseStrict(aCommandURL);
        pSlot = rSlotPool.GetUnoSlot(aCommandURL.Path);

        // when null, this command is not supported by the given component
        // (like eg. Calc does not have ".uno:DefaultBullet" etc.)
        if (pSlot)
        {
            // Initialize slot to dispatch .uno: Command.
            pViewFrame->GetBindings().GetDispatch(pSlot, aCommandURL, false);
        }
    }
}

static int doc_getDocumentType (LibreOfficeKitDocument* pThis)
{
    SolarMutexGuard aGuard;

    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    try
    {
        uno::Reference<lang::XServiceInfo> xDocument(pDocument->mxComponent, uno::UNO_QUERY_THROW);

        if (xDocument->supportsService("com.sun.star.sheet.SpreadsheetDocument"))
        {
            return LOK_DOCTYPE_SPREADSHEET;
        }
        else if (xDocument->supportsService("com.sun.star.presentation.PresentationDocument"))
        {
            return LOK_DOCTYPE_PRESENTATION;
        }
        else if (xDocument->supportsService("com.sun.star.drawing.DrawingDocument"))
        {
            return LOK_DOCTYPE_DRAWING;
        }
        else if (xDocument->supportsService("com.sun.star.text.TextDocument") || xDocument->supportsService("com.sun.star.text.WebDocument"))
        {
            return LOK_DOCTYPE_TEXT;
        }
        else
        {
            gImpl->maLastExceptionMsg = "unknown document type";
        }
    }
    catch (const uno::Exception& exception)
    {
        gImpl->maLastExceptionMsg = "exception: " + exception.Message;
    }
    return LOK_DOCTYPE_OTHER;
}

static int doc_getParts (LibreOfficeKitDocument* pThis)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return 0;
    }

    return pDoc->getParts();
}

static int doc_getPart (LibreOfficeKitDocument* pThis)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return 0;
    }

    return pDoc->getPart();
}

static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->setPart( nPart );
}

static char* doc_getPartPageRectangles(LibreOfficeKitDocument* pThis)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }

    OUString sRectangles = pDoc->getPartPageRectangles();
    OString aString = OUStringToOString(sRectangles, RTL_TEXTENCODING_UTF8);
    char* pMemory = static_cast<char*>(malloc(aString.getLength() + 1));
    strcpy(pMemory, aString.getStr());
    return pMemory;

}

static char* doc_getPartName(LibreOfficeKitDocument* pThis, int nPart)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }

    OUString sName = pDoc->getPartName( nPart );
    OString aString = OUStringToOString(sName, RTL_TEXTENCODING_UTF8);
    char* pMemory = static_cast<char*>(malloc(aString.getLength() + 1));
    strcpy(pMemory, aString.getStr());
    return pMemory;

}

static char* doc_getPartHash(LibreOfficeKitDocument* pThis, int nPart)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }

    OUString sHash = pDoc->getPartHash(nPart);
    OString aString = OUStringToOString(sHash, RTL_TEXTENCODING_UTF8);
    char* pMemory = static_cast<char*>(malloc(aString.getLength() + 1));
    strcpy(pMemory, aString.getStr());
    return pMemory;

}

static void doc_setPartMode(LibreOfficeKitDocument* pThis,
                            int nPartMode)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }


    int nCurrentPart = pDoc->getPart();

    pDoc->setPartMode(nPartMode);

    // We need to make sure the internal state is updated, just changing the mode
    // might not update the relevant shells (i.e. impress will keep rendering the
    // previous mode unless we do this).
    // TODO: we might want to do this within the relevant components rather than
    // here, but that's also dependent on how we implement embedded object
    // rendering I guess?
    // TODO: we could be clever and e.g. set to 0 when we change to/from
    // embedded object mode, and not when changing between slide/notes/combined
    // modes?
    if ( nCurrentPart < pDoc->getParts() )
    {
        pDoc->setPart( nCurrentPart );
    }
    else
    {
        pDoc->setPart( 0 );
    }
}

static void doc_paintTile(LibreOfficeKitDocument* pThis,
                          unsigned char* pBuffer,
                          const int nCanvasWidth, const int nCanvasHeight,
                          const int nTilePosX, const int nTilePosY,
                          const int nTileWidth, const int nTileHeight)
{
    SolarMutexGuard aGuard;

    SAL_INFO( "lok.tiledrendering", "paintTile: painting [" << nTileWidth << "x" << nTileHeight <<
              "]@(" << nTilePosX << ", " << nTilePosY << ") to [" <<
              nCanvasWidth << "x" << nCanvasHeight << "]px" );

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

#if defined(UNX) && !defined(MACOSX) && !defined(ENABLE_HEADLESS)

#if defined(IOS)
    SystemGraphicsData aData;
    aData.rCGContext = reinterpret_cast<CGContextRef>(pBuffer);
    // the Size argument is irrelevant, I hope
    ScopedVclPtrInstance<VirtualDevice> pDevice(&aData, Size(1, 1), DeviceFormat::DEFAULT);

    pDoc->paintTile(*pDevice.get(), nCanvasWidth, nCanvasHeight,
                    nTilePosX, nTilePosY, nTileWidth, nTileHeight);
#else
    ScopedVclPtrInstance< VirtualDevice > pDevice(nullptr, Size(1, 1), DeviceFormat::DEFAULT) ;

#if !defined(ANDROID)
    // Set background to transparent by default.
    pDevice->SetBackground(Wallpaper(Color(COL_TRANSPARENT)));
#endif

    pDevice->SetOutputSizePixelScaleOffsetAndBuffer(
                Size(nCanvasWidth, nCanvasHeight), Fraction(1.0), Point(),
                pBuffer);

    pDoc->paintTile(*pDevice.get(), nCanvasWidth, nCanvasHeight,
                    nTilePosX, nTilePosY, nTileWidth, nTileHeight);
#endif

#else
    (void) pBuffer;
#endif
}


static void doc_paintPartTile(LibreOfficeKitDocument* pThis,
                              unsigned char* pBuffer,
                              const int nPart,
                              const int nCanvasWidth, const int nCanvasHeight,
                              const int nTilePosX, const int nTilePosY,
                              const int nTileWidth, const int nTileHeight)
{
    SolarMutexGuard aGuard;

    SAL_INFO( "lok.tiledrendering", "paintPartTile: painting @ " << nPart << " ["
               << nTileWidth << "x" << nTileHeight << "]@("
               << nTilePosX << ", " << nTilePosY << ") to ["
               << nCanvasWidth << "x" << nCanvasHeight << "]px" );

    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
    int nOrigViewId = doc_getView(pThis);

    if (nOrigViewId < 0)
    {
        // tile painting always needs a SfxViewShell::Current(), but actually
        // it does not really matter which one - all of them should paint the
        // same thing.
        int viewCount = doc_getViewsCount(pThis);
        if (viewCount == 0)
            return;

        std::vector<int> viewIds(viewCount);
        doc_getViewIds(pThis, viewIds.data(), viewCount);

        nOrigViewId = viewIds[0];
        doc_setView(pThis, nOrigViewId);
    }

    // Disable callbacks while we are painting.
    if (nOrigViewId >= 0 && pDocument->mpCallbackFlushHandlers[nOrigViewId])
        pDocument->mpCallbackFlushHandlers[nOrigViewId]->setPartTilePainting(true);

    try
    {
        // Text documents have a single coordinate system; don't change part.
        int nOrigPart = 0;
        const bool isText = (doc_getDocumentType(pThis) == LOK_DOCTYPE_TEXT);
        int nViewId = nOrigViewId;
        if (!isText)
        {
            // Check if just switching to an other view is enough, that has
            // less side-effects.
            if (nPart != doc_getPart(pThis))
            {
                SfxViewShell* pViewShell = SfxViewShell::GetFirst();
                while (pViewShell)
                {
                    if (pViewShell->getPart() == nPart)
                    {
                        nViewId = (sal_Int32)pViewShell->GetViewShellId();
                        doc_setView(pThis, nViewId);
                        break;
                    }
                    pViewShell = SfxViewShell::GetNext(*pViewShell);
                }
            }

            nOrigPart = doc_getPart(pThis);
            if (nPart != nOrigPart)
            {
                doc_setPart(pThis, nPart);
            }
        }

        doc_paintTile(pThis, pBuffer, nCanvasWidth, nCanvasHeight, nTilePosX, nTilePosY, nTileWidth, nTileHeight);

        if (!isText && nPart != nOrigPart)
        {
            doc_setPart(pThis, nOrigPart);
        }
        if (!isText && nViewId != nOrigViewId)
        {
            doc_setView(pThis, nOrigViewId);
        }
    }
    catch (const std::exception&)
    {
        // Nothing to do but restore the PartTilePainting flag.
    }

    if (nOrigViewId >= 0 && pDocument->mpCallbackFlushHandlers[nOrigViewId])
        pDocument->mpCallbackFlushHandlers[nOrigViewId]->setPartTilePainting(false);
}

static int doc_getTileMode(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/)
{
    return LOK_TILEMODE_BGRA;
}

static void doc_getDocumentSize(LibreOfficeKitDocument* pThis,
                                long* pWidth,
                                long* pHeight)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (pDoc)
    {
        Size aDocumentSize = pDoc->getDocumentSize();
        *pWidth = aDocumentSize.Width();
        *pHeight = aDocumentSize.Height();
    }
    else
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
    }
}

static void doc_initializeForRendering(LibreOfficeKitDocument* pThis,
                                       const char* pArguments)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (pDoc)
    {
        doc_iniUnoCommands();
        pDoc->initializeForTiledRendering(
                comphelper::containerToSequence(jsonToPropertyValuesVector(pArguments)));
    }
}

static void doc_registerCallback(LibreOfficeKitDocument* pThis,
                                 LibreOfficeKitCallback pCallback,
                                 void* pData)
{
    SolarMutexGuard aGuard;

    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    int nView = SfxLokHelper::getView();
    if (nView < 0)
        return;

    if (pCallback != nullptr)
    {
        size_t nId = nView;
        for (auto& pair : pDocument->mpCallbackFlushHandlers)
        {
            if (pair.first == nId)
                continue;

            pair.second->addViewStates(nView);
        }
    }
    else
    {
        size_t nId = nView;
        for (auto& pair : pDocument->mpCallbackFlushHandlers)
        {
            if (pair.first == nId)
                continue;

            pair.second->removeViewStates(nView);
        }
    }

    pDocument->mpCallbackFlushHandlers[nView].reset(new CallbackFlushHandler(pThis, pCallback, pData));

    if (pCallback != nullptr)
    {
        size_t nId = nView;
        for (const auto& pair : pDocument->mpCallbackFlushHandlers)
        {
            if (pair.first == nId)
                continue;

            pDocument->mpCallbackFlushHandlers[nView]->addViewStates(pair.first);
        }
    }

    if (SfxViewShell* pViewShell = SfxViewShell::Current())
    {
        pViewShell->registerLibreOfficeKitViewCallback(CallbackFlushHandler::callback, pDocument->mpCallbackFlushHandlers[nView].get());
    }
}

/// Returns the JSON representation of all the comments in the document
static char* getPostIts(LibreOfficeKitDocument* pThis)
{
    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }
    OUString aComments = pDoc->getPostIts();
    return strdup(aComments.toUtf8().getStr());
}

/// Returns the JSON representation of the positions of all the comments in the document
static char* getPostItsPos(LibreOfficeKitDocument* pThis)
{
    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }
    OUString aComments = pDoc->getPostItsPos();
    return strdup(aComments.toUtf8().getStr());
}

static char* getRulerState(LibreOfficeKitDocument* pThis)
{
    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }
    OUString state = pDoc->getRulerState();
    return strdup(state.toUtf8().getStr());
}

static void doc_postKeyEvent(LibreOfficeKitDocument* pThis, int nType, int nCharCode, int nKeyCode)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }
    pDoc->postKeyEvent(nType, nCharCode, nKeyCode);
}

static void doc_postWindowKeyEvent(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nType, int nCharCode, int nKeyCode)
{
    SolarMutexGuard aGuard;

    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
    if (!pWindow)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support dialog rendering, or window not found.";
        return;
    }

    KeyEvent aEvent(nCharCode, nKeyCode, 0);

    switch (nType)
    {
        case LOK_KEYEVENT_KEYINPUT:
            Application::PostKeyEvent(VclEventId::WindowKeyInput, pWindow, &aEvent);
            break;
        case LOK_KEYEVENT_KEYUP:
            Application::PostKeyEvent(VclEventId::WindowKeyUp, pWindow, &aEvent);
            break;
        default:
            assert(false);
            break;
    }
}

/** Class to react on finishing of a dispatched command.

    This will call a LOK_COMMAND_FINISHED callback when postUnoCommand was
    called with the parameter requesting the notification.

    @see LibreOfficeKitCallbackType::LOK_CALLBACK_UNO_COMMAND_RESULT.
*/
class DispatchResultListener : public cppu::WeakImplHelper<css::frame::XDispatchResultListener>
{
    OString maCommand;                 ///< Command for which this is the result.
    std::shared_ptr<CallbackFlushHandler> mpCallback; ///< Callback to call.

public:
    DispatchResultListener(const char* pCommand, std::shared_ptr<CallbackFlushHandler> const & pCallback)
        : maCommand(pCommand)
        , mpCallback(pCallback)
    {
        assert(mpCallback);
    }

    virtual void SAL_CALL dispatchFinished(const css::frame::DispatchResultEvent& rEvent) override
    {
        boost::property_tree::ptree aTree;
        aTree.put("commandName", maCommand.getStr());

        if (rEvent.State != frame::DispatchResultState::DONTKNOW)
        {
            bool bSuccess = (rEvent.State == frame::DispatchResultState::SUCCESS);
            aTree.put("success", bSuccess);
        }

        aTree.add_child("result", unoAnyToPropertyTree(rEvent.Result));

        std::stringstream aStream;
        boost::property_tree::write_json(aStream, aTree);
        OString aPayload = aStream.str().c_str();
        mpCallback->queue(LOK_CALLBACK_UNO_COMMAND_RESULT, aPayload.getStr());
    }

    virtual void SAL_CALL disposing(const css::lang::EventObject&) override {}
};

static void doc_postUnoCommand(LibreOfficeKitDocument* pThis, const char* pCommand, const char* pArguments, bool bNotifyWhenFinished)
{
    SolarMutexGuard aGuard;

    SfxObjectShell* pDocSh = SfxObjectShell::Current();
    OUString aCommand(pCommand, strlen(pCommand), RTL_TEXTENCODING_UTF8);
    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    std::vector<beans::PropertyValue> aPropertyValuesVector(jsonToPropertyValuesVector(pArguments));

    beans::PropertyValue aSynchronMode;
    aSynchronMode.Name = "SynchronMode";
    aSynchronMode.Value <<= false;
    aPropertyValuesVector.push_back(aSynchronMode);

    int nView = SfxLokHelper::getView();
    if (nView < 0)
        return;

    // handle potential interaction
    if (gImpl && aCommand == ".uno:Save")
    {
        rtl::Reference<LOKInteractionHandler> const pInteraction(
            new LOKInteractionHandler("save", gImpl, pDocument));
        uno::Reference<task::XInteractionHandler2> const xInteraction(pInteraction.get());

        beans::PropertyValue aValue;
        aValue.Name = "InteractionHandler";
        aValue.Value <<= xInteraction;
        aPropertyValuesVector.push_back(aValue);

        bool bDontSaveIfUnmodified = false;
        aPropertyValuesVector.erase(std::remove_if(aPropertyValuesVector.begin(),
                                                   aPropertyValuesVector.end(),
                                                   [&bDontSaveIfUnmodified](const beans::PropertyValue& aItem){
                                                       if (aItem.Name == "DontSaveIfUnmodified")
                                                       {
                                                           bDontSaveIfUnmodified = aItem.Value.get<bool>();
                                                           return true;
                                                       }
                                                       return false;
                                                   }), aPropertyValuesVector.end());

        // skip saving and tell the result via UNO_COMMAND_RESULT
        if (bDontSaveIfUnmodified && !pDocSh->IsModified())
        {
            boost::property_tree::ptree aTree;
            aTree.put("commandName", pCommand);
            aTree.put("success", false);

            // Add the reason for not saving
            const uno::Any aResultValue = uno::makeAny(OUString("unmodified"));
            aTree.add_child("result", unoAnyToPropertyTree(aResultValue));

            std::stringstream aStream;
            boost::property_tree::write_json(aStream, aTree);
            OString aPayload = aStream.str().c_str();
            pDocument->mpCallbackFlushHandlers[nView]->queue(LOK_CALLBACK_UNO_COMMAND_RESULT, aPayload.getStr());
            return;
        }
    }

    bool bResult = false;
    if (bNotifyWhenFinished && pDocument->mpCallbackFlushHandlers[nView])
    {
        bResult = comphelper::dispatchCommand(aCommand, comphelper::containerToSequence(aPropertyValuesVector),
                new DispatchResultListener(pCommand, pDocument->mpCallbackFlushHandlers[nView]));
    }
    else
        bResult = comphelper::dispatchCommand(aCommand, comphelper::containerToSequence(aPropertyValuesVector));

    if (!bResult)
    {
        gImpl->maLastExceptionMsg = "Failed to dispatch the .uno: command";
    }
}

static void doc_postMouseEvent(LibreOfficeKitDocument* pThis, int nType, int nX, int nY, int nCount, int nButtons, int nModifier)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->postMouseEvent(nType, nX, nY, nCount, nButtons, nModifier);

    Pointer aPointer = pDoc->getPointer();
    // We don't map all possible pointers hence we need a default
    OString aPointerString = "default";
    auto aIt = aPointerMap.find(aPointer.GetStyle());
    if (aIt != aPointerMap.end())
    {
        aPointerString = aIt->second;
    }

    LibLODocument_Impl* pLib = static_cast<LibLODocument_Impl*>(pThis);
    int nView = SfxLokHelper::getView();
    if (nView < 0)
        return;

    if (pLib->mpCallbackFlushHandlers[nView])
    {
        pLib->mpCallbackFlushHandlers[nView]->queue(LOK_CALLBACK_MOUSE_POINTER, aPointerString.getStr());
    }
}

static void doc_postWindowMouseEvent(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nType, int nX, int nY, int nCount, int nButtons, int nModifier)
{
    SolarMutexGuard aGuard;

    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
    if (!pWindow)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support dialog rendering, or window not found.";
        return;
    }

    Point aPos(nX, nY);
    MouseEvent aEvent(aPos, nCount, MouseEventModifiers::SIMPLECLICK, nButtons, nModifier);

    if (Dialog* pDialog = dynamic_cast<Dialog*>(pWindow.get()))
    {
        pDialog->EnableInput();
    }

    switch (nType)
    {
        case LOK_MOUSEEVENT_MOUSEBUTTONDOWN:
            Application::PostMouseEvent(VclEventId::WindowMouseButtonDown, pWindow, &aEvent);
            break;
        case LOK_MOUSEEVENT_MOUSEBUTTONUP:
            Application::PostMouseEvent(VclEventId::WindowMouseButtonUp, pWindow, &aEvent);
            break;
        case LOK_MOUSEEVENT_MOUSEMOVE:
            Application::PostMouseEvent(VclEventId::WindowMouseMove, pWindow, &aEvent);
            break;
        default:
            assert(false);
            break;
    }
}

static void doc_setTextSelection(LibreOfficeKitDocument* pThis, int nType, int nX, int nY)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->setTextSelection(nType, nX, nY);
}

static char* doc_getTextSelection(LibreOfficeKitDocument* pThis, const char* pMimeType, char** pUsedMimeType)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }

    OString aUsedMimeType;
    OString aRet = pDoc->getTextSelection(pMimeType, aUsedMimeType);
    if (aUsedMimeType.isEmpty())
        aRet = pDoc->getTextSelection("text/plain;charset=utf-8", aUsedMimeType);

    char* pMemory = static_cast<char*>(malloc(aRet.getLength() + 1));
    strcpy(pMemory, aRet.getStr());

    if (pUsedMimeType)
    {
        *pUsedMimeType = static_cast<char*>(malloc(aUsedMimeType.getLength() + 1));
        strcpy(*pUsedMimeType, aUsedMimeType.getStr());
    }

    return pMemory;
}

static bool doc_paste(LibreOfficeKitDocument* pThis, const char* pMimeType, const char* pData, size_t nSize)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return false;
    }

    uno::Reference<datatransfer::XTransferable> xTransferable(new LOKTransferable(pMimeType, pData, nSize));
    uno::Reference<datatransfer::clipboard::XClipboard> xClipboard(new LOKClipboard);
    xClipboard->setContents(xTransferable, uno::Reference<datatransfer::clipboard::XClipboardOwner>());
    pDoc->setClipboard(xClipboard);
    if (!pDoc->isMimeTypeSupported())
    {
        if (gImpl)
            gImpl->maLastExceptionMsg = "Document doesn't support this mime type";
        return false;
    }

    uno::Sequence<beans::PropertyValue> aPropertyValues(comphelper::InitPropertySequence(
    {
        {"AnchorType", uno::makeAny(static_cast<sal_uInt16>(text::TextContentAnchorType_AS_CHARACTER))},
    }));
    if (!comphelper::dispatchCommand(".uno:Paste", aPropertyValues))
    {
        gImpl->maLastExceptionMsg = "Failed to dispatch the .uno: command";
        return false;
    }

    return true;
}

static void doc_setGraphicSelection(LibreOfficeKitDocument* pThis, int nType, int nX, int nY)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->setGraphicSelection(nType, nX, nY);
}

static void doc_resetSelection(LibreOfficeKitDocument* pThis)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->resetSelection();
}

static char* getLanguages(const char* pCommand)
{
    css::uno::Sequence< css::lang::Locale > aLocales;

    if (xContext.is())
    {
        css::uno::Reference<css::linguistic2::XLinguServiceManager2> xLangSrv = css::linguistic2::LinguServiceManager::create(xContext);
        if (xLangSrv.is())
        {
            css::uno::Reference<css::linguistic2::XSpellChecker> xSpell(xLangSrv->getSpellChecker(), css::uno::UNO_QUERY);
            css::uno::Reference<css::linguistic2::XSupportedLocales> xLocales(xSpell, css::uno::UNO_QUERY);

            if (xLocales.is())
                aLocales = xLocales->getLocales();
        }
    }

    boost::property_tree::ptree aTree;
    aTree.put("commandName", pCommand);
    boost::property_tree::ptree aValues;
    boost::property_tree::ptree aChild;
    OUString sLanguage;
    for ( sal_Int32 itLocale = 0; itLocale < aLocales.getLength(); itLocale++ )
    {
        sLanguage = SvtLanguageTable::GetLanguageString(LanguageTag::convertToLanguageType(aLocales[itLocale]));
        if (sLanguage.startsWith("{") && sLanguage.endsWith("}"))
            continue;

        aChild.put("", sLanguage.toUtf8());
        aValues.push_back(std::make_pair("", aChild));
    }
    aTree.add_child("commandValues", aValues);
    std::stringstream aStream;
    boost::property_tree::write_json(aStream, aTree);
    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
    strcpy(pJson, aStream.str().c_str());
    pJson[aStream.str().size()] = '\0';
    return pJson;
}

static char* getFonts (const char* pCommand)
{
    SfxObjectShell* pDocSh = SfxObjectShell::Current();
    const SvxFontListItem* pFonts = static_cast<const SvxFontListItem*>(
        pDocSh->GetItem(SID_ATTR_CHAR_FONTLIST));
    const FontList* pList = pFonts ? pFonts->GetFontList() : nullptr;

    boost::property_tree::ptree aTree;
    aTree.put("commandName", pCommand);
    boost::property_tree::ptree aValues;
    if ( pList )
    {
        sal_uInt16 nFontCount = pList->GetFontNameCount();
        for (sal_uInt16 i = 0; i < nFontCount; ++i)
        {
            boost::property_tree::ptree aChildren;
            const FontMetric& rFontMetric = pList->GetFontName(i);
            const sal_IntPtr* pAry = pList->GetSizeAry(rFontMetric);
            sal_uInt16 nSizeCount = 0;
            while (pAry[nSizeCount])
            {
                boost::property_tree::ptree aChild;
                aChild.put("", (float)pAry[nSizeCount] / 10);
                aChildren.push_back(std::make_pair("", aChild));
                nSizeCount++;
            }
            aValues.add_child(rFontMetric.GetFamilyName().toUtf8().getStr(), aChildren);
        }
    }
    aTree.add_child("commandValues", aValues);
    std::stringstream aStream;
    boost::property_tree::write_json(aStream, aTree);
    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
    strcpy(pJson, aStream.str().c_str());
    pJson[aStream.str().size()] = '\0';
    return pJson;
}

static char* getFontSubset (const OString& aFontName)
{
    OUString aFoundFont(::rtl::Uri::decode(OStringToOUString(aFontName, RTL_TEXTENCODING_UTF8), rtl_UriDecodeStrict, RTL_TEXTENCODING_UTF8));
    SfxObjectShell* pDocSh = SfxObjectShell::Current();
    const SvxFontListItem* pFonts = static_cast<const SvxFontListItem*>(
        pDocSh->GetItem(SID_ATTR_CHAR_FONTLIST));
    const FontList* pList = pFonts ? pFonts->GetFontList() : nullptr;

    boost::property_tree::ptree aTree;
    aTree.put("commandName", ".uno:FontSubset");
    boost::property_tree::ptree aValues;

    if ( pList && !aFoundFont.isEmpty() )
    {
        sal_uInt16 nFontCount = pList->GetFontNameCount();
        sal_uInt16 nItFont = 0;
        for (; nItFont < nFontCount; ++nItFont)
        {
            if (aFoundFont == pList->GetFontName(nItFont).GetFamilyName())
            {
                break;
            }
        }

        if ( nItFont < nFontCount )
        {
            FontCharMapRef xFontCharMap (new FontCharMap());
            auto aDevice(VclPtr<VirtualDevice>::Create(nullptr, Size(1, 1), DeviceFormat::DEFAULT));
            vcl::Font aFont(pList->GetFontName(nItFont));

            aDevice->SetFont(aFont);
            aDevice->GetFontCharMap(xFontCharMap);
            SubsetMap aSubMap(xFontCharMap);

            for (auto const& subset : aSubMap.GetSubsetMap())
            {
                boost::property_tree::ptree aChild;
                aChild.put("", static_cast<int>(ublock_getCode(subset.GetRangeMin())));
                aValues.push_back(std::make_pair("", aChild));
            }
        }
    }

    aTree.add_child("commandValues", aValues);
    std::stringstream aStream;
    boost::property_tree::write_json(aStream, aTree);
    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
    strcpy(pJson, aStream.str().c_str());
    pJson[aStream.str().size()] = '\0';
    return pJson;
}

static char* getStyles(LibreOfficeKitDocument* pThis, const char* pCommand)
{
    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    boost::property_tree::ptree aTree;
    aTree.put("commandName", pCommand);
    uno::Reference<css::style::XStyleFamiliesSupplier> xStyleFamiliesSupplier(pDocument->mxComponent, uno::UNO_QUERY);
    uno::Reference<container::XNameAccess> xStyleFamilies(xStyleFamiliesSupplier->getStyleFamilies(), uno::UNO_QUERY);
    uno::Sequence<OUString> aStyleFamilies = xStyleFamilies->getElementNames();

    static const std::vector<OUString> aWriterStyles =
    {
        "Text body",
        "Quotations",
        "Title",
        "Subtitle",
        "Heading 1",
        "Heading 2",
        "Heading 3"
    };

    // We need to keep a list of the default style names
    // in order to filter these out later when processing
    // the full list of styles.
    std::set<OUString> aDefaultStyleNames;

    boost::property_tree::ptree aValues;
    for (sal_Int32 nStyleFam = 0; nStyleFam < aStyleFamilies.getLength(); ++nStyleFam)
    {
        boost::property_tree::ptree aChildren;
        OUString sStyleFam = aStyleFamilies[nStyleFam];
        uno::Reference<container::XNameAccess> xStyleFamily(xStyleFamilies->getByName(sStyleFam), uno::UNO_QUERY);

        // Writer provides a huge number of styles, we have a list of 7 "default" styles which
        // should be shown in the normal dropdown, which we should add to the start of the list
        // to simplify their selection.
        if (sStyleFam == "ParagraphStyles"
            && doc_getDocumentType(pThis) == LOK_DOCTYPE_TEXT)
        {
            for (const OUString& rStyle: aWriterStyles)
            {
                aDefaultStyleNames.insert( rStyle );

                boost::property_tree::ptree aChild;
                aChild.put("", rStyle.toUtf8());
                aChildren.push_back(std::make_pair("", aChild));
            }
        }

        uno::Sequence<OUString> aStyles = xStyleFamily->getElementNames();
        for (const OUString& rStyle: aStyles )
        {
            // Filter out the default styles - they are already at the top
            // of the list
            if (aDefaultStyleNames.find(rStyle) == aDefaultStyleNames.end() ||
                (sStyleFam != "ParagraphStyles" || doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT) )
            {
                boost::property_tree::ptree aChild;
                aChild.put("", rStyle.toUtf8());
                aChildren.push_back(std::make_pair("", aChild));
            }
        }
        aValues.add_child(sStyleFam.toUtf8().getStr(), aChildren);
    }

    {
        boost::property_tree::ptree aCommandList;

        {
            boost::property_tree::ptree aChild;

            OUString sClearFormat = SvxResId(RID_SVXSTR_CLEARFORM);

            boost::property_tree::ptree aName;
            aName.put("", sClearFormat.toUtf8());
            aChild.push_back(std::make_pair("text", aName));

            boost::property_tree::ptree aCommand;
            aCommand.put("", ".uno:ResetAttributes");
            aChild.push_back(std::make_pair("id", aCommand));

            aCommandList.push_back(std::make_pair("", aChild));
        }

        aValues.add_child("Commands", aCommandList);
    }

    aTree.add_child("commandValues", aValues);
    std::stringstream aStream;
    boost::property_tree::write_json(aStream, aTree);
    char* pJson = static_cast<char*>(malloc(aStream.str().size() + 1));
    strcpy(pJson, aStream.str().c_str());
    pJson[aStream.str().size()] = '\0';
    return pJson;
}

enum class UndoOrRedo
{
    UNDO,
    REDO
};

/// Returns the JSON representation of either an undo or a redo stack.
static char* getUndoOrRedo(LibreOfficeKitDocument* pThis, UndoOrRedo eCommand)
{
    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    auto pBaseModel = dynamic_cast<SfxBaseModel*>(pDocument->mxComponent.get());
    if (!pBaseModel)
        return nullptr;

    SfxObjectShell* pObjectShell = pBaseModel->GetObjectShell();
    if (!pObjectShell)
        return nullptr;

    svl::IUndoManager* pUndoManager = pObjectShell->GetUndoManager();
    if (!pUndoManager)
        return nullptr;

    OUString aString;
    if (eCommand == UndoOrRedo::UNDO)
        aString = pUndoManager->GetUndoActionsInfo();
    else
        aString = pUndoManager->GetRedoActionsInfo();
    char* pJson = strdup(aString.toUtf8().getStr());
    return pJson;
}

/// Returns the JSON representation of the redline stack.
static char* getTrackedChanges(LibreOfficeKitDocument* pThis)
{
    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);

    uno::Reference<document::XRedlinesSupplier> xRedlinesSupplier(pDocument->mxComponent, uno::UNO_QUERY);
    std::stringstream aStream;
    // We want positions of the track changes also which is not possible from
    // UNO. Enable positioning information for text documents only for now, so
    // construct the tracked changes JSON from inside the sw/, not here using UNO
    if (doc_getDocumentType(pThis) != LOK_DOCTYPE_TEXT && xRedlinesSupplier.is())
    {
        uno::Reference<container::XEnumeration> xRedlines = xRedlinesSupplier->getRedlines()->createEnumeration();
        boost::property_tree::ptree aRedlines;
        for (size_t nIndex = 0; xRedlines->hasMoreElements(); ++nIndex)
        {
            uno::Reference<beans::XPropertySet> xRedline(xRedlines->nextElement(), uno::UNO_QUERY);
            boost::property_tree::ptree aRedline;
            aRedline.put("index", nIndex);

            OUString sAuthor;
            xRedline->getPropertyValue("RedlineAuthor") >>= sAuthor;
            aRedline.put("author", sAuthor.toUtf8().getStr());

            OUString sType;
            xRedline->getPropertyValue("RedlineType") >>= sType;
            aRedline.put("type", sType.toUtf8().getStr());

            OUString sComment;
            xRedline->getPropertyValue("RedlineComment") >>= sComment;
            aRedline.put("comment", sComment.toUtf8().getStr());

            OUString sDescription;
            xRedline->getPropertyValue("RedlineDescription") >>= sDescription;
            aRedline.put("description", sDescription.toUtf8().getStr());

            util::DateTime aDateTime;
            xRedline->getPropertyValue("RedlineDateTime") >>= aDateTime;
            OUString sDateTime = utl::toISO8601(aDateTime);
            aRedline.put("dateTime", sDateTime.toUtf8().getStr());

            aRedlines.push_back(std::make_pair("", aRedline));
        }

        boost::property_tree::ptree aTree;
        aTree.add_child("redlines", aRedlines);
        boost::property_tree::write_json(aStream, aTree);
    }
    else
    {
        ITiledRenderable* pDoc = getTiledRenderable(pThis);
        if (!pDoc)
        {
            gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
            return nullptr;
        }
        OUString aTrackedChanges = pDoc->getTrackedChanges();
        aStream << aTrackedChanges.toUtf8();
    }

    char* pJson = strdup(aStream.str().c_str());
    return pJson;
}


/// Returns the JSON representation of the redline author table.
static char* getTrackedChangeAuthors(LibreOfficeKitDocument* pThis)
{
    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return nullptr;
    }
    OUString aAuthors = pDoc->getTrackedChangeAuthors();
    return strdup(aAuthors.toUtf8().getStr());
}

static char* doc_getCommandValues(LibreOfficeKitDocument* pThis, const char* pCommand)
{
    SolarMutexGuard aGuard;

    OString aCommand(pCommand);
    static const OString aViewRowColumnHeaders(".uno:ViewRowColumnHeaders");
    static const OString aCellCursor(".uno:CellCursor");
    static const OString aFontSubset(".uno:FontSubset&name=");

    if (!strcmp(pCommand, ".uno:LanguageStatus"))
    {
        return getLanguages(pCommand);
    }
    else if (!strcmp(pCommand, ".uno:CharFontName"))
    {
        return getFonts(pCommand);
    }
    else if (!strcmp(pCommand, ".uno:StyleApply"))
    {
        return getStyles(pThis, pCommand);
    }
    else if (aCommand == ".uno:Undo")
    {
        return getUndoOrRedo(pThis, UndoOrRedo::UNDO);
    }
    else if (aCommand == ".uno:Redo")
    {
        return getUndoOrRedo(pThis, UndoOrRedo::REDO);
    }
    else if (aCommand == ".uno:AcceptTrackedChanges")
    {
        return getTrackedChanges(pThis);
    }
    else if (aCommand == ".uno:TrackedChangeAuthors")
    {
        return getTrackedChangeAuthors(pThis);
    }
    else if (aCommand == ".uno:ViewAnnotations")
    {
        return getPostIts(pThis);
    }
    else if (aCommand == ".uno:ViewAnnotationsPosition")
    {
        return getPostItsPos(pThis);
    }
    else if (aCommand == ".uno:RulerState")
    {
        return getRulerState(pThis);
    }
    else if (aCommand.startsWith(aViewRowColumnHeaders))
    {
        ITiledRenderable* pDoc = getTiledRenderable(pThis);
        if (!pDoc)
        {
            gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
            return nullptr;
        }

        tools::Rectangle aRectangle;
        if (aCommand.getLength() > aViewRowColumnHeaders.getLength())
        {
            // Command has parameters.
            int nX = 0;
            int nY = 0;
            int nWidth = 0;
            int nHeight = 0;
            OString aArguments = aCommand.copy(aViewRowColumnHeaders.getLength() + 1);
            sal_Int32 nParamIndex = 0;
            do
            {
                OString aParamToken = aArguments.getToken(0, '&', nParamIndex);
                sal_Int32 nIndex = 0;
                OString aKey;
                OString aValue;
                do
                {
                    OString aToken = aParamToken.getToken(0, '=', nIndex);
                    if (!aKey.getLength())
                        aKey = aToken;
                    else
                        aValue = aToken;
                }
                while (nIndex >= 0);
                if (aKey == "x")
                    nX = aValue.toInt32();
                else if (aKey == "y")
                    nY = aValue.toInt32();
                else if (aKey == "width")
                    nWidth = aValue.toInt32();
                else if (aKey == "height")
                    nHeight = aValue.toInt32();
            }
            while (nParamIndex >= 0);

            aRectangle = tools::Rectangle(nX, nY, nX + nWidth, nY + nHeight);
        }

        OUString aHeaders = pDoc->getRowColumnHeaders(aRectangle);
        OString aString = OUStringToOString(aHeaders, RTL_TEXTENCODING_UTF8);

        char* pMemory = static_cast<char*>(malloc(aString.getLength() + 1));
        strcpy(pMemory, aString.getStr());
        return pMemory;
    }
    else if (aCommand.startsWith(aCellCursor))
    {
        ITiledRenderable* pDoc = getTiledRenderable(pThis);
        if (!pDoc)
        {
            gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
            return nullptr;
        }

        // Command has parameters.
        int nOutputWidth = 0;
        int nOutputHeight = 0;
        long nTileWidth = 0;
        long nTileHeight = 0;
        if (aCommand.getLength() > aCellCursor.getLength())
        {
            OString aArguments = aCommand.copy(aCellCursor.getLength() + 1);
            sal_Int32 nParamIndex = 0;
            do
            {
                OString aParamToken = aArguments.getToken(0, '&', nParamIndex);
                sal_Int32 nIndex = 0;
                OString aKey;
                OString aValue;
                do
                {
                    OString aToken = aParamToken.getToken(0, '=', nIndex);
                    if (!aKey.getLength())
                        aKey = aToken;
                    else
                        aValue = aToken;
                }
                while (nIndex >= 0);
                if (aKey == "outputWidth")
                    nOutputWidth = aValue.toInt32();
                else if (aKey == "outputHeight")
                    nOutputHeight = aValue.toInt32();
                else if (aKey == "tileWidth")
                    nTileWidth = aValue.toInt64();
                else if (aKey == "tileHeight")
                    nTileHeight = aValue.toInt64();
            }
            while (nParamIndex >= 0);
        }

        OString aString = pDoc->getCellCursor(nOutputWidth, nOutputHeight, nTileWidth, nTileHeight);

        char* pMemory = static_cast<char*>(malloc(aString.getLength() + 1));
        strcpy(pMemory, aString.getStr());
        return pMemory;
    }
    else if (aCommand.startsWith(aFontSubset))
    {
        return getFontSubset(OString(pCommand + aFontSubset.getLength()));
    }
    else
    {
        gImpl->maLastExceptionMsg = "Unknown command, no values returned";
        return nullptr;
    }
}

static void doc_setClientZoom(LibreOfficeKitDocument* pThis, int nTilePixelWidth, int nTilePixelHeight,
        int nTileTwipWidth, int nTileTwipHeight)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->setClientZoom(nTilePixelWidth, nTilePixelHeight, nTileTwipWidth, nTileTwipHeight);
}

static void doc_setClientVisibleArea(LibreOfficeKitDocument* pThis, int nX, int nY, int nWidth, int nHeight)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    tools::Rectangle aRectangle(Point(nX, nY), Size(nWidth, nHeight));
    pDoc->setClientVisibleArea(aRectangle);
}

static void doc_setOutlineState(LibreOfficeKitDocument* pThis, bool bColumn, int nLevel, int nIndex, bool bHidden)
{
    SolarMutexGuard aGuard;

    ITiledRenderable* pDoc = getTiledRenderable(pThis);
    if (!pDoc)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support tiled rendering";
        return;
    }

    pDoc->setOutlineState(bColumn, nLevel, nIndex, bHidden);
}

static int doc_createView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/)
{
    SolarMutexGuard aGuard;

    return SfxLokHelper::createView();
}

static void doc_destroyView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/, int nId)
{
    SolarMutexGuard aGuard;

    SfxLokHelper::destroyView(nId);
}

static void doc_setView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/, int nId)
{
    SolarMutexGuard aGuard;

    SfxLokHelper::setView(nId);
}

static int doc_getView(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/)
{
    SolarMutexGuard aGuard;

    return SfxLokHelper::getView();
}

static int doc_getViewsCount(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/)
{
    SolarMutexGuard aGuard;

    return SfxLokHelper::getViewsCount();
}

static bool doc_getViewIds(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/, int* pArray, size_t nSize)
{
    SolarMutexGuard aGuard;

    return SfxLokHelper::getViewIds(pArray, nSize);
}

static void doc_setViewLanguage(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/, int nId, const char* language)
{
    SolarMutexGuard aGuard;

    SfxLokHelper::setViewLanguage(nId, OStringToOUString(language, RTL_TEXTENCODING_UTF8));
}

unsigned char* doc_renderFont(SAL_UNUSED_PARAMETER LibreOfficeKitDocument* /*pThis*/,
                    const char* pFontName,
                    const char* pChar,
                    int* pFontWidth,
                    int* pFontHeight)
{
    SolarMutexGuard aGuard;

    OString aSearchedFontName(pFontName);
    OUString aText(OStringToOUString(pChar, RTL_TEXTENCODING_UTF8));
    SfxObjectShell* pDocSh = SfxObjectShell::Current();
    const SvxFontListItem* pFonts = static_cast<const SvxFontListItem*>(
        pDocSh->GetItem(SID_ATTR_CHAR_FONTLIST));
    const FontList* pList = pFonts ? pFonts->GetFontList() : nullptr;

    const int nDefaultFontSize = 25;

    if ( pList )
    {
        sal_uInt16 nFontCount = pList->GetFontNameCount();
        for (sal_uInt16 i = 0; i < nFontCount; ++i)
        {
            const FontMetric& rFontMetric = pList->GetFontName(i);
            const OUString& aFontName = rFontMetric.GetFamilyName();
            if (aSearchedFontName != aFontName.toUtf8())
                continue;

            if (aText.isEmpty())
                aText = rFontMetric.GetFamilyName();

            auto aDevice(
                VclPtr<VirtualDevice>::Create(
                    nullptr, Size(1, 1), DeviceFormat::DEFAULT));
            ::tools::Rectangle aRect;
            vcl::Font aFont(rFontMetric);
            aFont.SetFontSize(Size(0, nDefaultFontSize));
            aDevice->SetFont(aFont);
            aDevice->GetTextBoundRect(aRect, aText);
            if (aRect.IsEmpty())
                break;

            int nFontWidth = aRect.BottomRight().X() + 1;
            int nFontHeight = aRect.BottomRight().Y() + 1;

            if (!(nFontWidth > 0 && nFontHeight > 0))
                break;

            if (*pFontWidth > 0 && *pFontHeight > 0)
            {
                double fScaleX = *pFontWidth / static_cast<double>(nFontWidth);
                double fScaleY = *pFontHeight / static_cast<double>(nFontHeight);

                double fScale = std::min(fScaleX, fScaleY);

                if (fScale >= 1.0)
                {
                    int nFontSize = fScale * nDefaultFontSize;
                    aFont.SetFontSize(Size(0, nFontSize));
                    aDevice->SetFont(aFont);
                }

                aRect = tools::Rectangle(0, 0, *pFontWidth, *pFontHeight);

                nFontWidth = *pFontWidth;
                nFontHeight = *pFontHeight;

            }

            unsigned char* pBuffer = static_cast<unsigned char*>(malloc(4 * nFontWidth * nFontHeight));
            if (!pBuffer)
                break;

            memset(pBuffer, 0, nFontWidth * nFontHeight * 4);
            aDevice->SetBackground(Wallpaper(COL_TRANSPARENT));
            aDevice->SetOutputSizePixelScaleOffsetAndBuffer(
                        Size(nFontWidth, nFontHeight), Fraction(1.0), Point(),
                        pBuffer);

            if (*pFontWidth > 0 && *pFontHeight > 0)
            {
                DrawTextFlags nStyle =
                        DrawTextFlags::Center
                        | DrawTextFlags::VCenter
                        | DrawTextFlags::MultiLine
                        | DrawTextFlags::WordBreakHyphenation;// | DrawTextFlags::WordBreak ;

                aDevice->DrawText(aRect, aText, nStyle);
            }
            else
            {
                *pFontWidth = nFontWidth;
                *pFontHeight = nFontHeight;

                aDevice->DrawText(Point(0,0), aText);
            }


            return pBuffer;
        }
    }
    return nullptr;
}

static void doc_paintWindow(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId,
                            unsigned char* pBuffer,
                            const int nX, const int nY,
                            const int nWidth, const int nHeight)
{
    SolarMutexGuard aGuard;

    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
    if (!pWindow)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support dialog rendering, or window not found.";
        return;
    }

    ScopedVclPtrInstance<VirtualDevice> pDevice(nullptr, Size(1, 1), DeviceFormat::DEFAULT);
    pDevice->SetBackground(Wallpaper(Color(COL_TRANSPARENT)));

    pDevice->SetOutputSizePixelScaleOffsetAndBuffer(Size(nWidth, nHeight), Fraction(1.0), Point(), pBuffer);

    MapMode aMapMode(pDevice->GetMapMode());
    aMapMode.SetOrigin(Point(-nX, -nY));
    pDevice->SetMapMode(aMapMode);

    comphelper::LibreOfficeKit::setDialogPainting(true);
    pWindow->PaintToDevice(pDevice.get(), Point(0, 0), Size());
    comphelper::LibreOfficeKit::setDialogPainting(false);
}

static void doc_postWindow(LibreOfficeKitDocument* /*pThis*/, unsigned nLOKWindowId, int nAction)
{
    SolarMutexGuard aGuard;

    VclPtr<Window> pWindow = vcl::Window::FindLOKWindow(nLOKWindowId);
    if (!pWindow)
    {
        gImpl->maLastExceptionMsg = "Document doesn't support dialog rendering, or window not found.";
        return;
    }

    if (Dialog* pDialog = dynamic_cast<Dialog*>(pWindow.get()))
    {
        if (nAction == LOK_WINDOW_CLOSE)
            pDialog->Close();
    }
}

static char* lo_getError (LibreOfficeKit *pThis)
{
    SolarMutexGuard aGuard;

    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
    OString aString = OUStringToOString(pLib->maLastExceptionMsg, RTL_TEXTENCODING_UTF8);
    char* pMemory = static_cast<char*>(malloc(aString.getLength() + 1));
    strcpy(pMemory, aString.getStr());
    return pMemory;
}

static void lo_freeError(char* pFree)
{
    free(pFree);
}

static char* lo_getFilterTypes(LibreOfficeKit* pThis)
{
    SolarMutexGuard aGuard;

    LibLibreOffice_Impl* pImpl = static_cast<LibLibreOffice_Impl*>(pThis);

    if (!xSFactory.is())
        xSFactory = comphelper::getProcessServiceFactory();

    if (!xSFactory.is())
    {
        pImpl->maLastExceptionMsg = "Service factory is not available";
        return nullptr;
    }

    uno::Reference<container::XNameAccess> xTypeDetection(xSFactory->createInstance("com.sun.star.document.TypeDetection"), uno::UNO_QUERY);
    uno::Sequence<OUString> aTypes = xTypeDetection->getElementNames();
    boost::property_tree::ptree aTree;
    for (const OUString& rType : aTypes)
    {
        uno::Sequence<beans::PropertyValue> aValues;
        if (xTypeDetection->getByName(rType) >>= aValues)
        {
            auto it = std::find_if(aValues.begin(), aValues.end(), [](const beans::PropertyValue& rValue) { return rValue.Name == "MediaType"; });
            OUString aValue;
            if (it != aValues.end() && (it->Value >>= aValue) && !aValue.isEmpty())
            {
                boost::property_tree::ptree aChild;
                aChild.put("MediaType", aValue.toUtf8());
                aTree.add_child(rType.toUtf8().getStr(), aChild);
            }
        }
    }
    std::stringstream aStream;
    boost::property_tree::write_json(aStream, aTree);
    return strdup(aStream.str().c_str());
}

static void lo_setOptionalFeatures(LibreOfficeKit* pThis, unsigned long long const features)
{
    SolarMutexGuard aGuard;

    LibLibreOffice_Impl *const pLib = static_cast<LibLibreOffice_Impl*>(pThis);
    pLib->mOptionalFeatures = features;
    if (features & LOK_FEATURE_PART_IN_INVALIDATION_CALLBACK)
        comphelper::LibreOfficeKit::setPartInInvalidation(true);
    if (features & LOK_FEATURE_NO_TILED_ANNOTATIONS)
        comphelper::LibreOfficeKit::setTiledAnnotations(false);
    if (features & LOK_FEATURE_RANGE_HEADERS)
        comphelper::LibreOfficeKit::setRangeHeaders(true);
}

static void lo_setDocumentPassword(LibreOfficeKit* pThis,
        const char* pURL, const char* pPassword)
{
    SolarMutexGuard aGuard;

    assert(pThis);
    assert(pURL);
    LibLibreOffice_Impl *const pLib = static_cast<LibLibreOffice_Impl*>(pThis);
    assert(pLib->mInteractionMap.find(OString(pURL)) != pLib->mInteractionMap.end());
    pLib->mInteractionMap.find(OString(pURL))->second->SetPassword(pPassword);
}

static char* lo_getVersionInfo(SAL_UNUSED_PARAMETER LibreOfficeKit* /*pThis*/)
{
    const OUString sVersionStrTemplate(
        "{ "
        "\"ProductName\": \"%PRODUCTNAME\", "
        "\"ProductVersion\": \"%PRODUCTVERSION\", "
        "\"ProductExtension\": \"%PRODUCTEXTENSION\", "
        "\"BuildId\": \"%BUILDID\" "
        "}"
    );
    const OString sVersionStr = OUStringToOString(ReplaceStringHookProc(sVersionStrTemplate), RTL_TEXTENCODING_UTF8);

    char* pVersion = static_cast<char*>(malloc(sVersionStr.getLength() + 1));
    strcpy(pVersion, sVersionStr.getStr());
    return pVersion;
}

static void force_c_locale()
{
    // force locale (and resource files loaded) to en-US
    OUString aLangISO("en-US");
    SvtSysLocaleOptions aLocalOptions;
    aLocalOptions.SetLocaleConfigString(aLangISO);
    aLocalOptions.SetUILocaleConfigString(aLangISO);
}

static void aBasicErrorFunc(const OUString& rError, const OUString& rAction)
{
    OStringBuffer aBuffer("Unexpected dialog: ");
    aBuffer.append(OUStringToOString(rAction, RTL_TEXTENCODING_ASCII_US));
    aBuffer.append(" Error: ");
    aBuffer.append(OUStringToOString(rError, RTL_TEXTENCODING_ASCII_US));

    fprintf(stderr, "Unexpected basic error dialog '%s'\n", aBuffer.getStr());
}

static bool initialize_uno(const OUString& aAppProgramURL)
{
#ifdef IOS
    // For iOS we already hardcode the inifile as "rc" in the .app directory.
    rtl::Bootstrap::setIniFilename(aAppProgramURL + "/" SAL_CONFIGFILE("fundamental"));
    xContext = cppu::defaultBootstrap_InitialComponentContext(aAppProgramURL + "/rc");
#elif defined MACOSX
    rtl::Bootstrap::setIniFilename(aAppProgramURL + "/../Resources/" SAL_CONFIGFILE("soffice"));
    xContext = cppu::defaultBootstrap_InitialComponentContext();
#else
    rtl::Bootstrap::setIniFilename(aAppProgramURL + "/" SAL_CONFIGFILE("soffice"));
    xContext = cppu::defaultBootstrap_InitialComponentContext();
#endif

    if (!xContext.is())
    {
        gImpl->maLastExceptionMsg = "XComponentContext could not be created";
        SAL_INFO("lok", "XComponentContext could not be created");
        return false;
    }

    xFactory = xContext->getServiceManager();
    if (!xFactory.is())
    {
        gImpl->maLastExceptionMsg = "XMultiComponentFactory could not be created";
        SAL_INFO("lok", "XMultiComponentFactory could not be created");
        return false;
    }

    xSFactory.set(xFactory, uno::UNO_QUERY_THROW);
    comphelper::setProcessServiceFactory(xSFactory);

    SAL_INFO("lok", "Uno initialized  - " <<  xContext.is());

    // set UserInstallation to user profile dir in test/user-template
//    rtl::Bootstrap aDefaultVars;
//    aDefaultVars.set(OUString("UserInstallation"), aAppProgramURL + "../registry" );
    // configmgr setup ?

    return true;
}

#ifndef IOS
static void lo_startmain(void*)
{
    osl_setThreadName("lo_startmain");

    if (comphelper::SolarMutex::get())
        Application::GetSolarMutex().tryToAcquire();

    soffice_main();

    Application::ReleaseSolarMutex();
}
#endif

static bool bInitialized = false;

static void lo_status_indicator_callback(void *data, comphelper::LibreOfficeKit::statusIndicatorCallbackType type, int percent)
{
    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(data);

    if (!pLib->mpCallback)
        return;

    switch (type)
    {
    case comphelper::LibreOfficeKit::statusIndicatorCallbackType::Start:
        pLib->mpCallback(LOK_CALLBACK_STATUS_INDICATOR_START, nullptr, pLib->mpCallbackData);
        break;
    case comphelper::LibreOfficeKit::statusIndicatorCallbackType::SetValue:
        pLib->mpCallback(LOK_CALLBACK_STATUS_INDICATOR_SET_VALUE, OUString::number(percent).toUtf8().getStr(), pLib->mpCallbackData);
        break;
    case comphelper::LibreOfficeKit::statusIndicatorCallbackType::Finish:
        pLib->mpCallback(LOK_CALLBACK_STATUS_INDICATOR_FINISH, nullptr, pLib->mpCallbackData);
        break;
    }
}

/// Used only by LibreOfficeKit when used by Online to pre-initialize
static void preloadData()
{
    // First: sit down and read all dictionaries: yum.
    css::uno::Reference<css::linguistic2::XLinguServiceManager> xLngSvcMgr =
        css::linguistic2::LinguServiceManager::create(comphelper::getProcessComponentContext());
    css::uno::Reference<linguistic2::XSpellChecker> xSpellChecker(xLngSvcMgr->getSpellChecker());

    css::uno::Reference<linguistic2::XSupportedLocales> xLocales(xSpellChecker, css::uno::UNO_QUERY_THROW);
    uno::Sequence< css::lang::Locale > aLocales = xLocales->getLocales();
    std::cerr << "Preloading dictionaries: ";
    for (auto &it : aLocales)
    {
        std::cerr << it.Language << "_" << it.Country << " ";
        css::beans::PropertyValues aNone;
        xSpellChecker->isValid("forcefed", it, aNone);
    }
    std::cerr << "\n";
}

static int lo_initialize(LibreOfficeKit* pThis, const char* pAppPath, const char* pUserProfileUrl)
{
    enum {
        PRE_INIT,     // setup shared data in master process
        SECOND_INIT,  // complete init. after fork
        FULL_INIT     // do a standard complete init.
    } eStage;

    // Did we do a pre-initialize
    static bool bPreInited = false;

    // What stage are we at ?
    if (pThis == nullptr)
        eStage = PRE_INIT;
    else if (bPreInited)
        eStage = SECOND_INIT;
    else
        eStage = FULL_INIT;

    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);

    if (bInitialized)
        return 1;

    if (eStage == PRE_INIT)
        rtl_alloc_preInit(rtlAllocPreInitStart);
    else if (eStage == SECOND_INIT)
        rtl_alloc_preInit(rtlAllocPreInitEnd);

    if (eStage != SECOND_INIT)
        comphelper::LibreOfficeKit::setActive();

    if (eStage != PRE_INIT)
        comphelper::LibreOfficeKit::setStatusIndicatorCallback(lo_status_indicator_callback, pLib);

    if (pUserProfileUrl)
    {
        OUString url(
            pUserProfileUrl, strlen(pUserProfileUrl), RTL_TEXTENCODING_UTF8);
        OUString path;
        if (url.startsWithIgnoreAsciiCase("vnd.sun.star.pathname:", &path))
        {
            OUString url2;
            osl::FileBase::RC e = osl::FileBase::getFileURLFromSystemPath(
                path, url2);
            if (e == osl::FileBase::E_None)
                url = url2;
            else
                SAL_WARN("lok", "resolving <" << url << "> failed with " << +e);
        }
        rtl::Bootstrap::set("UserInstallation", url);
        if (eStage == SECOND_INIT)
            utl::Bootstrap::reloadData();
    }

    OUString aAppPath;
    if (pAppPath)
    {
        aAppPath = OUString(pAppPath, strlen(pAppPath), RTL_TEXTENCODING_UTF8);
    }
    else
    {
        // Fun conversion dance back and forth between URLs and system paths...
        OUString aAppURL;
        ::osl::Module::getUrlFromAddress( reinterpret_cast< oslGenericFunction >(lo_initialize),
                                          aAppURL);
        osl::FileBase::getSystemPathFromFileURL( aAppURL, aAppPath );
    }

    OUString aAppURL;
    if (osl::FileBase::getFileURLFromSystemPath(aAppPath, aAppURL) != osl::FileBase::E_None)
        return 0;

    try
    {
        if (eStage != SECOND_INIT)
        {
            SAL_INFO("lok", "Attempting to initialize UNO");

            if (!initialize_uno(aAppURL))
                return false;

            // Force headless -- this is only for bitmap rendering.
            rtl::Bootstrap::set("SAL_USE_VCLPLUGIN", "svp");

            // We specifically need to make sure we have the "headless"
            // command arg set (various code specifically checks via
            // CommandLineArgs):
            desktop::Desktop::GetCommandLineArgs().setHeadless();

#ifdef IOS
            // mpDefInst need to be initialized, which only happens in InitVCL(),
            // there might be more elegant ways to get InitVCL() called, but
            // this one works :-)
            InitVCL();
            SfxApplication::GetOrCreate();
#endif

            if (eStage == PRE_INIT)
            {
                std::cerr << "Init vcl\n";
                InitVCL();

                // pre-load all component libraries.
                if (!xContext.is())
                    throw css::uno::DeploymentException("preInit: XComponentContext is not created");

                css::uno::Reference< css::uno::XInterface > xService;
                xContext->getValueByName("/singletons/com.sun.star.lang.theServiceManager") >>= xService;
                if (!xService.is())
                    throw css::uno::DeploymentException("preInit: XMultiComponentFactory is not created");

                css::uno::Reference<css::lang::XInitialization> aService(
                    xService, css::uno::UNO_QUERY_THROW);

                // pre-requisites:
                // In order to load implementations and invoke
                // component factory it is required:
                // 1) defaultBootstrap_InitialComponentContext()
                // 2) comphelper::setProcessServiceFactory(xSFactory);
                // 3) InitVCL()
                aService->initialize({css::uno::makeAny<OUString>("preload")});

                preloadData();

                // Release Solar Mutex, lo_startmain thread should acquire it.
                Application::ReleaseSolarMutex();
            }

            force_c_locale();
        }

        // We could use InitVCL() here -- and used to before using soffice_main,
        // however that now deals with the initialisation for us (and it's not
        // possible to try to set up VCL twice.

        // Instead VCL init is done for us by soffice_main in a separate thread,
        // however we specifically can't proceed until this setup is complete
        // (or you get segfaults trying to use VCL and/or deadlocks due to other
        //  setup within soffice_main). Specifically the various Application::
        // functions depend on VCL being ready -- the deadlocks would happen
        // if you try to use loadDocument too early.

        // The RequestHandler is specifically set to be ready when all the other
        // init in Desktop::Main (run from soffice_main) is done. We can enable
        // the RequestHandler here (without starting any IPC thread;
        // shortcutting the invocation in Desktop::Main that would start the IPC
        // thread), and can then use it to wait until we're definitely ready to
        // continue.

        if (eStage != PRE_INIT)
        {
            SAL_INFO("lok", "Enabling RequestHandler");
#ifdef IOS
            RequestHandler::Enable(true);
#else
            RequestHandler::Enable(false);
            SAL_INFO("lok", "Starting soffice_main");
            RequestHandler::SetReady(false);
            pLib->maThread = osl_createThread(lo_startmain, nullptr);
            SAL_INFO("lok", "Waiting for RequestHandler");
            RequestHandler::WaitForReady();
#endif
            SAL_INFO("lok", "RequestHandler ready -- continuing");
        }

        if (eStage != SECOND_INIT)
            ErrorRegistry::RegisterDisplay(aBasicErrorFunc);

        SAL_INFO("lok", "LOK Initialized");
        if (eStage == PRE_INIT)
            bPreInited = true;
        else
            bInitialized = true;
    }
    catch (css::uno::Exception& exception)
    {
        fprintf(stderr, "Bootstrapping exception '%s'\n",
                 OUStringToOString(exception.Message, RTL_TEXTENCODING_UTF8).getStr());
    }

    if (eStage == PRE_INIT)
        rtl_alloc_preInit(rtlAllocPostInit);

    return bInitialized;
}

// Undo our clever trick of having SAL_DLLPUBLIC_EXPORT actually not
// meaning what is says in for the DISABLE_DYNLOADING case. See
// <sal/types.h>. Normally, when building just one big dylib (Android)
// or executable (iOS), most of our "public" symbols don't need to be
// visible outside that resulting dylib/executable. But
// libreofficekit_hook must be exported for dlsym() to find it,
// though, at least on iOS.

#if defined(__GNUC__) && defined(DISABLE_DYNLOADING)
__attribute__ ((visibility("default")))
#else
SAL_DLLPUBLIC_EXPORT
#endif
LibreOfficeKit *libreofficekit_hook_2(const char* install_path, const char* user_profile_path)
{
    if (!gImpl)
    {
        SAL_INFO("lok", "Create libreoffice object");

        gImpl = new LibLibreOffice_Impl();
        if (!lo_initialize(gImpl, install_path, user_profile_path))
        {
            lo_destroy(gImpl);
        }
    }
    return static_cast<LibreOfficeKit*>(gImpl);
}

#if defined(__GNUC__) && defined(DISABLE_DYNLOADING)
__attribute__ ((visibility("default")))
#else
SAL_DLLPUBLIC_EXPORT
#endif
LibreOfficeKit *libreofficekit_hook(const char* install_path)
{
    return libreofficekit_hook_2(install_path, nullptr);
}

SAL_JNI_EXPORT
int lok_preinit(const char* install_path, const char* user_profile_path)
{
    return lo_initialize(nullptr, install_path, user_profile_path);
}

static void lo_destroy(LibreOfficeKit* pThis)
{
    SolarMutexClearableGuard aGuard;

    bool bSuccess = false;
    LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);
    gImpl = nullptr;

    SAL_INFO("lok", "LO Destroy");

    comphelper::LibreOfficeKit::setStatusIndicatorCallback(nullptr, nullptr);
    uno::Reference <frame::XDesktop2> xDesktop = frame::Desktop::create ( ::comphelper::getProcessComponentContext() );
    // FIXME: the terminate() call here is a no-op because it detects
    // that LibreOfficeKit::isActive() and then returns early!
    bSuccess = xDesktop.is() && xDesktop->terminate();

    if (!bSuccess)
    {
        bSuccess = GetpApp() && GetpApp()->QueryExit();
    }

    if (!bSuccess)
    {
        Application::Quit();
    }

    aGuard.clear();

    osl_joinWithThread(pLib->maThread);
    osl_destroyThread(pLib->maThread);

    delete pLib;
    bInitialized = false;
    SAL_INFO("lok", "LO Destroy Done");
}

}

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