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/****************************************************************************
**
** Copyright (C) 1993-2009 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "RuntimePrefix.h"
#include "Qt3DSElementHelper.h"
#include "Qt3DSPresentation.h"
#include "Qt3DSApplication.h"
#include "Qt3DSCommandEventTypes.h"
using namespace qt3ds;
namespace Q3DStudio {
const char PRESENTATION_DELIMITER = ':';
const char NODE_DELIMITER = '.';
const TStringHash RESERVED_THIS = CHash::HashString("this");
const TStringHash RESERVED_PARENT = CHash::HashString("parent");
const TStringHash RESERVED_SCENE = CHash::HashString("Scene");
CElementHelper::CElementHelper()
{
}
CElementHelper::~CElementHelper()
{
}
TElement *CElementHelper::GetElement(qt3ds::runtime::IApplication &inApplication,
IPresentation *inDefaultPresentation, const char *inPath,
TElement *inStartElement)
{
if (!inPath || *inPath == 0)
return nullptr;
const char *thePath(inPath);
const char *theSubPath = nullptr;
IPresentation *thePresentation = nullptr;
size_t thePathLength = ::strlen(thePath) + 1;
char *theToken = Q3DStudio_allocate_desc(CHAR, thePathLength, "Token:TempPath");
// Try to get the specified presentation
theSubPath = ::strchr(thePath, PRESENTATION_DELIMITER);
TElement *theElement = inStartElement;
if (theSubPath) {
UINT32 theSubPathLength = static_cast<UINT32>(theSubPath - thePath);
::strncpy(theToken, thePath, theSubPathLength);
theToken[theSubPathLength] = '\0';
thePath = theSubPath + 1;
const CHAR *thePresentationName = theToken;
thePresentation = inApplication.GetPresentationById(thePresentationName);
}
if (!thePresentation)
thePresentation = inDefaultPresentation;
// Return nil if the inStartElement is not in the specified presentation
if (theElement
&& (!theSubPath && theElement->GetBelongedPresentation() != thePresentation)) {
thePresentation = theElement->GetBelongedPresentation();
}
if (!thePresentation)
return nullptr;
TStringHash theName;
INT32 theParseCounter = 0;
while (thePath && thePath[0] != '\0') {
++theParseCounter;
// Do some strtok() work here
theSubPath = ::strchr(thePath, NODE_DELIMITER);
if (theSubPath) {
UINT32 theSubPathLength = static_cast<UINT32>(theSubPath - thePath);
Q3DStudio_ASSERT(theSubPathLength < thePathLength);
::strncpy(theToken, thePath, theSubPathLength);
theToken[theSubPathLength] = '\0';
thePath = theSubPath + 1;
} else {
::strcpy(theToken, thePath);
thePath = nullptr;
}
// Hash the token and do some element searching
theName = CHash::HashString(theToken);
if (theName == RESERVED_PARENT) {
if (theElement)
theElement = theElement->GetParent();
} else if (theName == RESERVED_THIS) {
;
} else {
if (theName == RESERVED_SCENE && theParseCounter == 1) {
// theElement is nullptr, so using absolute path
theElement = thePresentation->GetRoot();
} else if (theElement) {
// Using relative path
theElement = theElement->FindChild(theName);
}
}
if (!theElement)
thePath = nullptr;
} // while
Q3DStudio_free(theToken, CHAR, thePathLength);
return theElement;
}
} // namespace Q3DStudio
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