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#include "curveio.h"
#include "tsystem.h"
#include "tstream.h"
#include "tdoubleparam.h"
#include "tfilepath_io.h"
#include "toonz/tproject.h"
#include "tconvert.h"
#include "filebrowserpopup.h"
#include "tundo.h"

//=============================================================================

class LoadCurveUndo : public TUndo
{
	TDoubleParamP m_curve;
	TDoubleParamP m_oldCurve, m_newCurve;

public:
	LoadCurveUndo(TDoubleParam *curve) : m_curve(curve)
	{
		m_oldCurve = static_cast<TDoubleParam *>(curve->clone());
	}
	void onAdd()
	{
		m_newCurve = static_cast<TDoubleParam *>(m_curve->clone());
	}

	void undo() const
	{
		m_curve->copy(m_oldCurve.getPointer());
	}
	void redo() const
	{
		m_curve->copy(m_newCurve.getPointer());
	}
	int getSize() const
	{
		return sizeof(*this) + 2 * sizeof(TDoubleParam); // not very accurate
	}
};

//=============================================================================

class CurvePopup : public FileBrowserPopup
{
	TFilePath m_folderPath;
	TDoubleParam *m_curve;

public:
	CurvePopup(const QString name, const TFilePath folderPath, TDoubleParam *curve)
		: FileBrowserPopup(name), m_folderPath(folderPath), m_curve(curve)
	{
		curve->addRef();
	}

	~CurvePopup() { m_curve->release(); }

	void setFilterType(QString type)
	{
		QStringList sl;
		sl << type;
		setFilterTypes(sl);
	}

	void initFolder() { setFolder(m_folderPath); }

	bool checkOverride(const TFilePath &fp) const
	{
		if (TFileStatus(fp).doesExist()) {
			QString question = QObject::tr("Are you sure you want to override ") + QString::fromStdWString(fp.getLevelNameW()) + "?";
			int ret = DVGui::MsgBox(question, QObject::tr("Override"), QObject::tr("Cancel"), 1);
			return ret == 1;
		} else
			return true;
	}

	TDoubleParam *getCurve() const { return m_curve; }
};

//=============================================================================

class SaveCurvePopup : public CurvePopup
{
public:
	SaveCurvePopup(const TFilePath folderPath, TDoubleParam *curve)
		: CurvePopup(tr("Save Curve"), folderPath, curve)
	{
		setOkText(tr("Save"));
		setFilterType("curve");
	}

	bool execute();
};

//-----------------------------------------------------------------------------

bool SaveCurvePopup::execute()
{
	if (m_selectedPaths.empty())
		return false;

	TFilePath fp(*m_selectedPaths.begin());

	if (fp.getType() == "")
		fp = fp.withType("curve");

	if (!checkOverride(fp))
		return false;

	try {
		TSystem::touchParentDir(fp);
		TOStream os(fp);
		getCurve()->saveData(os);
		return true;
	} catch (...) {
		DVGui::warning(QObject::tr("It is not possible to save the curve."));
		return false;
	}
}

//=============================================================================

class LoadCurvePopup : public CurvePopup
{
public:
	LoadCurvePopup(const TFilePath folderPath, TDoubleParam *curve)
		: CurvePopup(tr("Load Curve"), folderPath, curve)
	{
		setOkText(tr("Load"));
		setFilterType("curve");
	}

	bool execute();
};

//-----------------------------------------------------------------------------

bool LoadCurvePopup::execute()
{
	if (m_selectedPaths.empty())
		return false;

	TFilePath fp(*m_selectedPaths.begin());

	if (fp.getType() == "")
		fp = fp.withType("curve");

	if (!TFileStatus(fp).doesExist())
		return false;

	try {
		TIStream is(fp);
		//default value must be kept the same!!!
		TDoubleParam *curve = getCurve();
		double defaultValue = curve->getDefaultValue();
		LoadCurveUndo *undo = new LoadCurveUndo(curve);
		curve->loadData(is);
		curve->setDefaultValue(defaultValue);
		TUndoManager::manager()->add(undo);
	} catch (...) {
		DVGui::warning(QObject::tr("It is not possible to load the curve."));
		return false;
	}

	return true;
}

//=============================================================================

class ExportCurvePopup : public CurvePopup
{
	std::string m_name;

public:
	ExportCurvePopup(const TFilePath folderPath, TDoubleParam *curve, const std::string &name)
		: CurvePopup(tr("Export Curve"), folderPath, curve), m_name(name)
	{
		setOkText(tr("Export"));
		setFilterType("dat");
	}

	bool execute();
};

//-----------------------------------------------------------------------------

bool ExportCurvePopup::execute()
{
	if (m_selectedPaths.empty())
		return false;

	TFilePath fp(*m_selectedPaths.begin());

	if (fp.getType() == "")
		fp = fp.withType("dat");

	if (!checkOverride(fp))
		return false;

	try {
		TSystem::touchParentDir(fp);
		Tofstream os(fp);
		os << "# RELEASE:      5.0" << std::endl;
		os << "# FILE NAME:    " << toString(fp.getWideString()) << std::endl;
		os << "# COMPOSED BY:  " << TSystem::getUserName().toStdString() << std::endl;
		os << "# MACHINE NAME: " << TSystem::getHostName().toStdString() << std::endl;
		// os << "# DATE:         " << TSystem::getCurrentTime() << endl;
		os << std::endl
		   << std::endl;

		int frameCount = 1;
		TDoubleParam *curve = getCurve();
		if (curve->getKeyframeCount() > 0)
			frameCount = curve->keyframeIndexToFrame(curve->getKeyframeCount() - 1) + 1;

		os << "# Dump of:     " << m_name << std::endl;
		os << "# Frame range: 1 " << frameCount << std::endl;
		os << std::endl;

		for (int i = 0; i < frameCount; i++) {
			os.setf(std::ios::fixed, std::ios::floatfield);
			os.setf(std::ios::showpoint);
			os.precision(5);
			os.width(12);
			os << curve->getValue(i) << std::endl;
		}
	} catch (...) {
		DVGui::warning(QObject::tr("It is not possible to export data."));
		return false;
	}

	return true;
}

//------------------------------------------

void saveCurve(TDoubleParam *curve)
{
#ifdef BRAVODEMO
	DVGui::featureNotAvelaible();
	return false;
#endif
	TFilePath folderPath = TProjectManager::instance()->getCurrentProject()->getScenesPath();
	SaveCurvePopup popup(folderPath, curve);
	popup.exec();
}

//------------------------------------------

void loadCurve(TDoubleParam *curve)
{
#ifdef BRAVODEMO
	DVGui::featureNotAvelaible();
	return false;
#endif
	TFilePath folderPath = TProjectManager::instance()->getCurrentProject()->getScenesPath();
	LoadCurvePopup popup(folderPath, curve);
	popup.exec();
}

//------------------------------------------

void exportCurve(TDoubleParam *curve, const std::string &name)
{
#ifdef BRAVODEMO
	DVGui::featureNotAvelaible();
	return false;
#endif
	TFilePath folderPath = TProjectManager::instance()->getCurrentProject()->getScenesPath();
	ExportCurvePopup popup(folderPath, curve, name);
	popup.exec();
}