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//------------------------------------------------------
/*! Finger Tool : 線のノイズを埋めるツール
*/
#include "tstroke.h"
#include "tools/toolutils.h"
#include "tools/tool.h"
#include "tmathutil.h"
#include "tools/cursors.h"
#include "drawutil.h"
#include "tcolorstyles.h"
#include "tundo.h"
#include "tvectorimage.h"
#include "ttoonzimage.h"
#include "tproperty.h"
#include "toonz/strokegenerator.h"
#include "toonz/ttilesaver.h"
#include "toonz/txshsimplelevel.h"
#include "toonz/observer.h"
#include "toonz/toonzimageutils.h"
#include "toonz/levelproperties.h"
#include "toonz/stage2.h"
#include "toonz/ttileset.h"
#include "toonz/rasterstrokegenerator.h"
#include "tgl.h"
#include "tenv.h"

#include "trop.h"

#include "tinbetween.h"
#include "ttile.h"

#include "toonz/tpalettehandle.h"
#include "toonz/txsheethandle.h"
#include "toonz/txshlevelhandle.h"
#include "toonz/tframehandle.h"
#include "tools/toolhandle.h"
#include "tools/toolutils.h"

// For Qt translation support
#include <QCoreApplication>

#include "tools/stylepicker.h"
#include "toonzqt/tselectionhandle.h"
#include "toonzqt/styleselection.h"
#include "historytypes.h"

using namespace ToolUtils;

TEnv::IntVar FingerInvert("InknpaintFingerInvert", 0);
TEnv::DoubleVar FingerSize("InknpaintFingerSize", 10);

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

const int BackgroundStyle = 0;

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

namespace
{

class FingerUndo : public TRasterUndo
{
	std::vector<TThickPoint> m_points;
	int m_styleId;
	bool m_invert;

public:
	FingerUndo(TTileSetCM32 *tileSet,
			   const std::vector<TThickPoint> &points,
			   int styleId, bool invert,
			   TXshSimpleLevel *level,
			   const TFrameId &frameId)
		: TRasterUndo(tileSet, level, frameId, false, false, 0), m_points(points), m_styleId(styleId), m_invert(invert)
	{
	}

	void redo() const
	{
		TToonzImageP image = m_level->getFrame(m_frameId, true);
		TRasterCM32P ras = image->getRaster();
		RasterStrokeGenerator m_rasterTrack(ras, FINGER, INK, m_styleId, m_points[0], m_invert, 0, false);
		m_rasterTrack.setPointsSequence(m_points);
		m_rasterTrack.generateStroke(true);
		image->setSavebox(image->getSavebox() + m_rasterTrack.getBBox(m_rasterTrack.getPointsSequence()));

		ToolUtils::updateSaveBox();

		TTool::getApplication()->getCurrentXsheet()->notifyXsheetChanged();
		notifyImageChanged();
	}

	int getSize() const
	{
		return sizeof(*this) + TRasterUndo::getSize();
	}

	virtual QString getToolName()
	{
		return QString("Finger Tool");
	}
	int getHistoryType()
	{
		return HistoryType::FingerTool;
	}
};

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

void drawLine(const TPointD &point, const TPointD &centre, bool horizontal, bool isDecimal)
{
	if (!isDecimal) {
		if (horizontal) {
			tglDrawSegment(TPointD(point.x - 1.5, point.y + 0.5) + centre, TPointD(point.x - 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.y - 0.5, -point.x + 1.5) + centre, TPointD(point.y - 0.5, -point.x + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, -point.y + 0.5) + centre, TPointD(-point.x - 0.5, -point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, point.x - 0.5) + centre, TPointD(-point.y - 0.5, point.x + 0.5) + centre);

			tglDrawSegment(TPointD(point.y - 0.5, point.x + 0.5) + centre, TPointD(point.y - 0.5, point.x - 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 0.5, -point.y + 0.5) + centre, TPointD(point.x - 1.5, -point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, -point.x + 0.5) + centre, TPointD(-point.y - 0.5, -point.x + 1.5) + centre);
			tglDrawSegment(TPointD(-point.x - 0.5, point.y + 0.5) + centre, TPointD(-point.x + 0.5, point.y + 0.5) + centre);
		} else {
			tglDrawSegment(TPointD(point.x - 1.5, point.y + 1.5) + centre, TPointD(point.x - 1.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 1.5, point.y + 0.5) + centre, TPointD(point.x - 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 0.5, -point.x + 1.5) + centre, TPointD(point.y - 0.5, -point.x + 1.5) + centre);
			tglDrawSegment(TPointD(point.y - 0.5, -point.x + 1.5) + centre, TPointD(point.y - 0.5, -point.x + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, -point.y - 0.5) + centre, TPointD(-point.x + 0.5, -point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, -point.y + 0.5) + centre, TPointD(-point.x - 0.5, -point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 1.5, point.x - 0.5) + centre, TPointD(-point.y - 0.5, point.x - 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, point.x - 0.5) + centre, TPointD(-point.y - 0.5, point.x + 0.5) + centre);

			tglDrawSegment(TPointD(point.y + 0.5, point.x - 0.5) + centre, TPointD(point.y - 0.5, point.x - 0.5) + centre);
			tglDrawSegment(TPointD(point.y - 0.5, point.x - 0.5) + centre, TPointD(point.y - 0.5, point.x + 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 1.5, -point.y - 0.5) + centre, TPointD(point.x - 1.5, -point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 1.5, -point.y + 0.5) + centre, TPointD(point.x - 0.5, -point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 1.5, -point.x + 1.5) + centre, TPointD(-point.y - 0.5, -point.x + 1.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, -point.x + 1.5) + centre, TPointD(-point.y - 0.5, -point.x + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, point.y + 1.5) + centre, TPointD(-point.x + 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, point.y + 0.5) + centre, TPointD(-point.x - 0.5, point.y + 0.5) + centre);
		}
	} else {
		if (horizontal) {
			tglDrawSegment(TPointD(point.x - 0.5, point.y + 0.5) + centre, TPointD(point.x + 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 0.5, point.x - 0.5) + centre, TPointD(point.y + 0.5, point.x + 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 0.5, -point.x + 0.5) + centre, TPointD(point.y + 0.5, -point.x - 0.5) + centre);
			tglDrawSegment(TPointD(point.x + 0.5, -point.y - 0.5) + centre, TPointD(point.x - 0.5, -point.y - 0.5) + centre);
			tglDrawSegment(TPointD(-point.x - 0.5, -point.y - 0.5) + centre, TPointD(-point.x + 0.5, -point.y - 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, -point.x + 0.5) + centre, TPointD(-point.y - 0.5, -point.x - 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, point.x - 0.5) + centre, TPointD(-point.y - 0.5, point.x + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, point.y + 0.5) + centre, TPointD(-point.x - 0.5, point.y + 0.5) + centre);
		} else {
			tglDrawSegment(TPointD(point.x - 0.5, point.y + 1.5) + centre, TPointD(point.x - 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 0.5, point.y + 0.5) + centre, TPointD(point.x + 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 1.5, point.x - 0.5) + centre, TPointD(point.y + 0.5, point.x - 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 0.5, point.x - 0.5) + centre, TPointD(point.y + 0.5, point.x + 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 1.5, -point.x + 0.5) + centre, TPointD(point.y + 0.5, -point.x + 0.5) + centre);
			tglDrawSegment(TPointD(point.y + 0.5, -point.x + 0.5) + centre, TPointD(point.y + 0.5, -point.x - 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 0.5, -point.y - 1.5) + centre, TPointD(point.x - 0.5, -point.y - 0.5) + centre);
			tglDrawSegment(TPointD(point.x - 0.5, -point.y - 0.5) + centre, TPointD(point.x + 0.5, -point.y - 0.5) + centre);

			tglDrawSegment(TPointD(-point.x + 0.5, -point.y - 1.5) + centre, TPointD(-point.x + 0.5, -point.y - 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, -point.y - 0.5) + centre, TPointD(-point.x - 0.5, -point.y - 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 1.5, -point.x + 0.5) + centre, TPointD(-point.y - 0.5, -point.x + 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, -point.x + 0.5) + centre, TPointD(-point.y - 0.5, -point.x - 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 1.5, point.x - 0.5) + centre, TPointD(-point.y - 0.5, point.x - 0.5) + centre);
			tglDrawSegment(TPointD(-point.y - 0.5, point.x - 0.5) + centre, TPointD(-point.y - 0.5, point.x + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, point.y + 1.5) + centre, TPointD(-point.x + 0.5, point.y + 0.5) + centre);
			tglDrawSegment(TPointD(-point.x + 0.5, point.y + 0.5) + centre, TPointD(-point.x - 0.5, point.y + 0.5) + centre);
		}
	}
}

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

void drawEmptyCircle(int thick, const TPointD &mousePos, bool isPencil, bool isLxEven, bool isLyEven)
{
	TPointD pos = mousePos;
	if (isLxEven)
		pos.x += 0.5;
	if (isLyEven)
		pos.y += 0.5;
	if (!isPencil)
		tglDrawCircle(pos, (thick + 1) * 0.5);
	else {
		int x = 0, y = tround((thick * 0.5) - 0.5);
		int d = 3 - 2 * (int)(thick * 0.5);
		bool horizontal = true, isDecimal = thick % 2 != 0;
		drawLine(TPointD(x, y), pos, horizontal, isDecimal);
		while (y > x) {
			if (d < 0) {
				d = d + 4 * x + 6;
				horizontal = true;
			} else {
				d = d + 4 * (x - y) + 10;
				horizontal = false;
				y--;
			}
			x++;
			drawLine(TPointD(x, y), pos, horizontal, isDecimal);
		}
	}
}

} //namespace

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

class FingerTool : public TTool
{
	Q_DECLARE_TR_FUNCTIONS(FingerTool)

	RasterStrokeGenerator *m_rasterTrack;

	bool m_firstTime;

	double m_pointSize, m_distance2;

	bool m_selecting;
	TTileSaverCM32 *m_tileSaver;

	TPointD m_mousePos;

	TIntProperty m_toolSize;
	TBoolProperty m_invert;
	TPropertyGroup m_prop;
	int m_cursor;

	/*---	作業中のFrameIdをクリック時に保存し、マウスリリース時(Undoの登録時)
			に別のフレームに移動している場合があるため ---*/
	TFrameId m_workingFrameId;

	/*-- 最初のクリックでStyleを切り替える --*/
	void pick(const TPointD &pos);

public:
	FingerTool();

	void draw();
	void update(TToonzImageP ti, TRectD area);

	void updateTranslation();

	void leftButtonDown(const TPointD &pos, const TMouseEvent &e);
	void leftButtonDrag(const TPointD &pos, const TMouseEvent &e);
	void leftButtonUp(const TPointD &pos, const TMouseEvent &);
	void mouseMove(const TPointD &pos, const TMouseEvent &e);
	void onEnter();
	void onLeave();
	void onActivate();
	void onDeactivate();
	bool onPropertyChanged(std::string propertyName);

	TPropertyGroup *getProperties(int targetType) { return &m_prop; }
	ToolType getToolType() const { return TTool::LevelWriteTool; }
	int getCursorId() const { return m_cursor; }

	int getColorClass() const { return 2; }

	/*-- ドラッグ中にツールが切り替わった場合に備え、onDeactivateにもMouseReleaseと同じ処理を行う --*/
	void finishBrush();
};

FingerTool fingerTool;

//=============================================================================
//
//  InkPaintTool implemention
//
//-----------------------------------------------------------------------------

FingerTool::FingerTool()
	: TTool("T_Finger"), m_rasterTrack(0), m_pointSize(-1), m_selecting(false), m_tileSaver(0), m_cursor(ToolCursor::EraserCursor), m_toolSize("Size:", 1, 100, 10, false), m_invert("Invert", false), m_firstTime(true), m_workingFrameId(TFrameId())
{
	bind(TTool::ToonzImage);

	m_prop.bind(m_toolSize);
	m_prop.bind(m_invert);

	m_invert.setId("Invert");
}

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

void FingerTool::updateTranslation()
{
	m_toolSize.setQStringName(tr("Size:"));
	m_invert.setQStringName(tr("Invert", NULL));
}

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

void FingerTool::draw()
{
	if (m_pointSize == -1) {
		return;
	}

	TToonzImageP ti = (TToonzImageP)getImage(false);
	if (!ti)
		return;
	TRasterP ras = ti->getRaster();
	int lx = ras->getLx();
	int ly = ras->getLy();

	if ((ToonzCheck::instance()->getChecks() & ToonzCheck::eInk) || (ToonzCheck::instance()->getChecks() & ToonzCheck::ePaint))
		glColor3d(0.5, 0.8, 0.8);
	else
		glColor3d(1.0, 0.0, 0.0);

	drawEmptyCircle(m_toolSize.getValue(), m_mousePos, true, lx % 2 == 0, ly % 2 == 0);
}

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

const UINT pointCount = 20;

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

bool FingerTool::onPropertyChanged(std::string propertyName)
{
	/*-- サイズ --*/
	if (propertyName == m_toolSize.getName()) {
		FingerSize = m_toolSize.getValue();
		double x = m_toolSize.getValue();

		double minRange = 1;
		double maxRange = 100;

		double minSize = 0.01;
		double maxSize = 100;

		m_pointSize = (x - minRange) / (maxRange - minRange) * (maxSize - minSize) + minSize;
		invalidate();
	}

	//Invert
	else if (propertyName == m_invert.getName()) {
		FingerInvert = (int)(m_invert.getValue());
	}

	return true;
}

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

void FingerTool::leftButtonDown(const TPointD &pos, const TMouseEvent &e)
{
	pick(pos);

	m_selecting = true;
	TImageP image(getImage(true));

	if (TToonzImageP ti = image) {
		TRasterCM32P ras = ti->getRaster();
		if (ras) {
			int thickness = m_toolSize.getValue();
			int styleId = TTool::getApplication()->getCurrentLevelStyleIndex();
			TTileSetCM32 *tileSet = new TTileSetCM32(ras->getSize());
			m_tileSaver = new TTileSaverCM32(ras, tileSet);
			m_rasterTrack = new RasterStrokeGenerator(ras,
													  FINGER,
													  INK,
													  styleId,
													  TThickPoint(pos + convert(ras->getCenter()), thickness),
													  m_invert.getValue(),
													  0,
													  false);

			/*-- 作業中Fidを現在のFIDにする --*/
			m_workingFrameId = getFrameId();

			m_tileSaver->save(m_rasterTrack->getLastRect());
			TRect modifiedBbox = m_rasterTrack->generateLastPieceOfStroke(true);
			invalidate();
		}
	}
}

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

void FingerTool::leftButtonDrag(const TPointD &pos, const TMouseEvent &e)
{
	if (!m_selecting)
		return;

	m_mousePos = pos;
	if (TToonzImageP ri = TImageP(getImage(true))) {
		/*---	マウスを動かしながらショートカットで切り替わった場合、
				いきなりleftButtonDragから呼ばれることがあり、
				m_rasterTrackが無くて落ちることがある。 ---*/
		if (m_rasterTrack) {
			int thickness = m_toolSize.getValue();
			bool isAdded = m_rasterTrack->add(TThickPoint(pos + convert(ri->getRaster()->getCenter()), thickness));
			if (isAdded) {
				m_tileSaver->save(m_rasterTrack->getLastRect());
				TRect modifiedBbox = m_rasterTrack->generateLastPieceOfStroke(true);
				invalidate();
			}
		}
	}
}

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

void FingerTool::leftButtonUp(const TPointD &pos, const TMouseEvent &)
{
	if (!m_selecting)
		return;

	m_mousePos = pos;

	finishBrush();
}

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

void FingerTool::mouseMove(const TPointD &pos, const TMouseEvent &e)
{
	m_mousePos = pos;
	TPointD pp(tround(pos.x), tround(pos.y));
	m_mousePos = pp;
	invalidate();
}

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

void FingerTool::onEnter()
{
	if (m_firstTime) {
		m_invert.setValue(FingerInvert ? 1 : 0);
		m_toolSize.setValue(FingerSize);
		m_firstTime = false;
	}
	double x = m_toolSize.getValue();

	double minRange = 1;
	double maxRange = 100;

	double minSize = 0.01;
	double maxSize = 100;

	m_pointSize = (x - minRange) / (maxRange - minRange) * (maxSize - minSize) + minSize;

	if ((TToonzImageP)getImage(false))
		m_cursor = ToolCursor::PenCursor;
	else
		m_cursor = ToolCursor::CURSOR_NO;
}

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

void FingerTool::onLeave()
{
	m_pointSize = -1;
}

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

void FingerTool::onActivate()
{
	onEnter();
}

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

void FingerTool::onDeactivate()
{
	/*--- マウスドラッグ中(m_selecting=true)にツールが切り替わったときに線を終わらせる ---*/
	if (m_selecting)
		finishBrush();
}

//-----------------------------------------------------------------------------
/*! ドラッグ中にツールが切り替わった場合に備え、onDeactivateにもMouseReleaseと同じ処理を行う
*/
void FingerTool::finishBrush()
{
	if (TToonzImageP ti = (TToonzImageP)getImage(true)) {
		if (m_rasterTrack) {
			int thickness = m_toolSize.getValue();
			bool isAdded = m_rasterTrack->add(TThickPoint(m_mousePos + convert(ti->getRaster()->getCenter()), thickness));
			if (isAdded) {
				m_tileSaver->save(m_rasterTrack->getLastRect());
				TRect modifiedBbox = m_rasterTrack->generateLastPieceOfStroke(true, true);
			}

			TTool::Application *app = TTool::getApplication();
			TXshLevel *level = app->getCurrentLevel()->getLevel();
			TXshSimpleLevelP simLevel = level->getSimpleLevel();

			TFrameId frameId = m_workingFrameId.isEmptyFrame() ? getCurrentFid() : m_workingFrameId;

			TUndoManager::manager()->add(new FingerUndo(m_tileSaver->getTileSet(),
														m_rasterTrack->getPointsSequence(),
														m_rasterTrack->getStyleId(),
														m_rasterTrack->isSelective(),
														simLevel.getPointer(),
														frameId));
			ToolUtils::updateSaveBox();

			/*! FIdを指定して、作業中にフレームが動いても、
				クリック時のFidのサムネイルが更新されるようにする。
			*/
			notifyImageChanged(frameId);

			invalidate();
			delete m_rasterTrack;
			m_rasterTrack = 0;
			delete m_tileSaver;

			/*-- 作業中fIdをリセット --*/
			m_workingFrameId = TFrameId();
		}
	}
	m_selecting = false;
}

void FingerTool::pick(const TPointD &pos)
{
	int modeValue = 2; //LINES

	TImageP image = getImage(false);
	TToonzImageP ti = image;
	TVectorImageP vi = image;
	TXshSimpleLevel *level = getApplication()->getCurrentLevel()->getSimpleLevel();
	if (!ti || !level)
		return;

	/*--- 画面外をpickしても拾えないようにする ---*/
	if (!m_viewer->getGeometry().contains(pos))
		return;

	int subsampling = level->getImageSubsampling(getCurrentFid());

	StylePicker picker(image);

	int styleId = picker.pickStyleId(TScale(1.0 / subsampling) * pos + TPointD(-0.5, -0.5),
									 getPixelSize() * getPixelSize(),
									 modeValue);

	if (styleId < 0)
		return;

	if (modeValue == 2) //LINES
	{
		/*--- pickLineモードのとき、取得Styleが0の場合はカレントStyleを変えない。 ---*/
		if (styleId == 0)
			return;

		/*--- pickLineモードのとき、PurePaintの部分をクリックしてもカレントStyleを変えない ---*/
		if (ti && picker.pickTone(TScale(1.0 / subsampling) * pos + TPointD(-0.5, -0.5)) == 255)
			return;
	}

	/*--- Styleを選択している場合は選択を解除する ---*/
	TSelection *selection = TTool::getApplication()->getCurrentSelection()->getSelection();
	if (selection) {
		TStyleSelection *styleSelection = dynamic_cast<TStyleSelection *>(selection);
		if (styleSelection)
			styleSelection->selectNone();
	}

	getApplication()->setCurrentLevelStyleIndex(styleId);
}