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


#include <svx/ShapeTypeHandler.hxx>
#include <svx/SvxShapeTypes.hxx>
#include <svx/AccessibleShapeInfo.hxx>
#include <com/sun/star/drawing/XShapeDescriptor.hpp>
#include <vcl/svapp.hxx>
#include <svx/dialmgr.hxx>

#include <svx/unoshape.hxx>
#include <svx/svdoashp.hxx>
#include <svx/unoapi.hxx>

#include <svx/strings.hrc>

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

namespace accessibility {

// Pointer to the shape type handler singleton.
ShapeTypeHandler* ShapeTypeHandler::instance = nullptr;


// Create an empty reference to an accessible object.
static AccessibleShape*
    CreateEmptyShapeReference (
        const AccessibleShapeInfo& /*rShapeInfo*/,
        const AccessibleShapeTreeInfo& /*rShapeTreeInfo*/,
        ShapeTypeId /*nId*/)
{
    return nullptr;
}


ShapeTypeHandler& ShapeTypeHandler::Instance()
{
    // Using double check pattern to make sure that exactly one instance of
    // the shape type handler is instantiated.
    if (instance == nullptr)<--- outer condition: instance==nullptr
    {
        SolarMutexGuard aGuard;
        if (instance == nullptr)<--- identical inner condition: instance==nullptr
        {
            // Create the single instance of the shape type handler.
            instance = new ShapeTypeHandler;

            // Register the basic SVX shape types.
            RegisterDrawShapeTypes ();
        }
    }

    return *instance;
}


/** The given service name is first transformed into a slot id that
    identifies the place of the type descriptor.  From that descriptor the
    shape type id is returned.
*/
ShapeTypeId ShapeTypeHandler::GetTypeId (const OUString& aServiceName) const
{
    tServiceNameToSlotId::const_iterator I (maServiceNameToSlotId.find (aServiceName));
    if (I != maServiceNameToSlotId.end())
    {
        return maShapeTypeDescriptorList[I->second].mnShapeTypeId;
    }
    else
        return -1;
}


/** Extract the specified shape's service name and forward the request to
    the appropriate method.
*/
ShapeTypeId ShapeTypeHandler::GetTypeId (const uno::Reference<drawing::XShape>& rxShape) const
{
    uno::Reference<drawing::XShapeDescriptor> xDescriptor (rxShape, uno::UNO_QUERY);
    if (xDescriptor.is())
        return GetTypeId (xDescriptor->getShapeType());
    else
        return -1;
}


/** This factory method determines the type descriptor for the type of the
    given shape, then calls the descriptor's create function, and finally
    initializes the new object.
*/
rtl::Reference<AccessibleShape>
    ShapeTypeHandler::CreateAccessibleObject (
        const AccessibleShapeInfo& rShapeInfo,
        const AccessibleShapeTreeInfo& rShapeTreeInfo) const
{
    ShapeTypeId nSlotId (GetSlotId (rShapeInfo.mxShape));
    rtl::Reference<AccessibleShape> pShape(
        maShapeTypeDescriptorList[nSlotId].maCreateFunction (
            rShapeInfo,
            rShapeTreeInfo,
            maShapeTypeDescriptorList[nSlotId].mnShapeTypeId));
    return pShape;
}


/** Create the single instance of this class and initialize its list of
    type descriptors with an entry of an unknown type.
*/
ShapeTypeHandler::ShapeTypeHandler()
    : maShapeTypeDescriptorList (1)
{
    // Make sure that at least the UNKNOWN entry is present.
    // Resize the list, if necessary, so that the new type can be inserted.
    maShapeTypeDescriptorList[0].mnShapeTypeId = UNKNOWN_SHAPE_TYPE;
    maShapeTypeDescriptorList[0].msServiceName = "UNKNOWN_SHAPE_TYPE";
    maShapeTypeDescriptorList[0].maCreateFunction = CreateEmptyShapeReference;
    maServiceNameToSlotId[maShapeTypeDescriptorList[0].msServiceName] = 0;
}


ShapeTypeHandler::~ShapeTypeHandler()
{
    //  Because this class is a singleton and the only instance, whose
    //  destructor has just been called, is pointed to from instance,
    //  we reset the static variable instance, so that further calls to
    //  getInstance do not return an undefined object but create a new
    //  singleton.
    instance = nullptr;
}


void ShapeTypeHandler::AddShapeTypeList (int nDescriptorCount,
    ShapeTypeDescriptor const aDescriptorList[])
{
    SolarMutexGuard aGuard;

    // Determine first id of new type descriptor(s).
    int nFirstId = maShapeTypeDescriptorList.size();

    // Resize the list, if necessary, so that the types can be inserted.
    maShapeTypeDescriptorList.resize (nFirstId + nDescriptorCount);

    for (int i=0; i<nDescriptorCount; i++)
    {
        // Fill Type descriptor.
        maShapeTypeDescriptorList[nFirstId+i].mnShapeTypeId = aDescriptorList[i].mnShapeTypeId;
        maShapeTypeDescriptorList[nFirstId+i].msServiceName = aDescriptorList[i].msServiceName;
        maShapeTypeDescriptorList[nFirstId+i].maCreateFunction = aDescriptorList[i].maCreateFunction;

        // Update inverse mapping from service name to the descriptor's position.
        maServiceNameToSlotId[aDescriptorList[i].msServiceName] = nFirstId+i;
    }
}


long ShapeTypeHandler::GetSlotId (const OUString& aServiceName) const
{
    tServiceNameToSlotId::const_iterator I (maServiceNameToSlotId.find (aServiceName));
    if (I != maServiceNameToSlotId.end())
        return I->second;
    else
        return 0;
}


// Extract the given shape's service name and forward request to appropriate
// method.
long ShapeTypeHandler::GetSlotId (const uno::Reference<drawing::XShape>& rxShape) const
{
    uno::Reference<drawing::XShapeDescriptor> xDescriptor (rxShape, uno::UNO_QUERY);
    if (xDescriptor.is())
        return GetSlotId (xDescriptor->getShapeType());
    else
        return 0;
}

/// get the accessible base name for an object
OUString ShapeTypeHandler::CreateAccessibleBaseName (const uno::Reference<drawing::XShape>& rxShape)
{
    const char* pResourceId;
    OUString sName;

    switch (ShapeTypeHandler::Instance().GetTypeId (rxShape))
    {
      // case DRAWING_3D_POLYGON: was removed in original code in
      // AccessibleShape::CreateAccessibleBaseName.  See issue 11190 for details.
      // Id can be removed from SvxShapeTypes.hxx as well.
        case DRAWING_3D_CUBE:
            pResourceId = STR_ObjNameSingulCube3d;
            break;
        case DRAWING_3D_EXTRUDE:
            pResourceId = STR_ObjNameSingulExtrude3d;
            break;
        case DRAWING_3D_LATHE:
            pResourceId = STR_ObjNameSingulLathe3d;
            break;
        case DRAWING_3D_SCENE:
            pResourceId = STR_ObjNameSingulScene3d;
            break;
        case DRAWING_3D_SPHERE:
            pResourceId = STR_ObjNameSingulSphere3d;
            break;
        case DRAWING_CAPTION:
            pResourceId = STR_ObjNameSingulCAPTION;
            break;
        case DRAWING_CLOSED_BEZIER:
            pResourceId = STR_ObjNameSingulPATHFILL;
            break;
        case DRAWING_CLOSED_FREEHAND:
            pResourceId = STR_ObjNameSingulFREEFILL;
            break;
        case DRAWING_CONNECTOR:
            pResourceId = STR_ObjNameSingulEDGE;
            break;
        case DRAWING_CONTROL:
            pResourceId = STR_ObjNameSingulUno;
            break;
        case DRAWING_ELLIPSE:
            pResourceId = STR_ObjNameSingulCIRCE;
            break;
        case DRAWING_GROUP:
            pResourceId = STR_ObjNameSingulGRUP;
            break;
        case DRAWING_LINE:
            pResourceId = STR_ObjNameSingulLINE;
            break;
        case DRAWING_MEASURE:
            pResourceId = STR_ObjNameSingulMEASURE;
            break;
        case DRAWING_OPEN_BEZIER:
            pResourceId = STR_ObjNameSingulPATHLINE;
            break;
        case DRAWING_OPEN_FREEHAND:
            pResourceId = STR_ObjNameSingulFREELINE;
            break;
        case DRAWING_PAGE:
            pResourceId = STR_ObjNameSingulPAGE;
            break;
        case DRAWING_POLY_LINE:
            pResourceId = STR_ObjNameSingulPLIN;
            break;
        case DRAWING_POLY_LINE_PATH:
            pResourceId = STR_ObjNameSingulPLIN;
            break;
        case DRAWING_POLY_POLYGON:
            pResourceId = STR_ObjNameSingulPOLY;
            break;
        case DRAWING_POLY_POLYGON_PATH:
            pResourceId = STR_ObjNameSingulPOLY;
            break;
        case DRAWING_RECTANGLE:
            pResourceId = STR_ObjNameSingulRECT;
            break;
        case DRAWING_CUSTOM:
            pResourceId = STR_ObjNameSingulCUSTOMSHAPE;

            if (SvxShape* pShape = SvxShape::getImplementation(rxShape))
            {
                if (auto pCustomShape = dynamic_cast<SdrObjCustomShape*>(pShape->GetSdrObject()))
                {
                    if (pCustomShape->IsTextPath())
                        pResourceId = STR_ObjNameSingulFONTWORK;
                    else
                    {
                        pResourceId = nullptr;
                        sName = pCustomShape->GetCustomShapeName();
                    }
                }
            }
            break;
        case DRAWING_TEXT:
            pResourceId = STR_ObjNameSingulTEXT;
            break;
        default:
            pResourceId = nullptr;
            sName = "UnknownAccessibleShape";
            uno::Reference<drawing::XShapeDescriptor> xDescriptor (rxShape, uno::UNO_QUERY);
            if (xDescriptor.is())
                sName += ": " + xDescriptor->getShapeType();
            break;
    }

    if (pResourceId)
    {
        SolarMutexGuard aGuard;
        sName = SvxResId(pResourceId);
    }

    return sName;
}

} // end of namespace accessibility

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