/****************************************************************************
**
** This file is part of the LibreCAD project, a 2D CAD program
**
** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
**
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file gpl-2.0.txt included in the
** packaging of this file.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
**
** This copyright notice MUST APPEAR in all copies of the script!
**
**********************************************************************/


#ifndef RS_MTEXT_H
#define RS_MTEXT_H

#include <iosfwd>
#include "rs_entitycontainer.h"

class RS_Font;

/**
 * Holds the data that defines a text entity.
 */
struct RS_MTextData {
	/**
	 * Vertical alignments.
	 */
	enum VAlign {
		VATop,      /**< Top. */
		VAMiddle,   /**< Middle */
		VABottom    /**< Bottom */
	};

	/**
	 * Horizontal alignments.
	 */
	enum HAlign {
		HALeft,     /**< Left */
		HACenter,   /**< Centered */
		HARight     /**< Right */
	};

	/**
	 * MText drawing direction.
	 */
	enum MTextDrawingDirection {
		LeftToRight,     /**< Left to right */
		TopToBottom,     /**< Top to bottom */
		ByStyle          /**< Inherited from associated text style */
	};

	/**
	 * Line spacing style for MTexts.
	 */
	enum MTextLineSpacingStyle {
		AtLeast,        /**< Taller characters will override */
		Exact           /**< Taller characters will not override */
	};

	/**
	 * Default constructor. Leaves the data object uninitialized.
	 */
	RS_MTextData() = default;

	/**
	 * Constructor with initialisation.
	 *
	 * @param insertionPoint Insertion point
	 * @param height Nominal (initial) text height
	 * @param width Reference rectangle width
	 * @param valign Vertical alignment
	 * @param halign Horizontal alignment
	 * @param drawingDirection Drawing direction
	 * @param lineSpacingStyle Line spacing style
	 * @param lineSpacingFactor Line spacing factor
	 * @param text Text string
	 * @param style Text style name
	 * @param angle Rotation angle
	 * @param updateMode RS2::Update will update the text entity instantly
	 *    RS2::NoUpdate will not update the entity. You can update
	 *    it later manually using the update() method. This is
	 *    often the case since you might want to adjust attributes
	 *    after creating a text entity.
	 */
	RS_MTextData(const RS_Vector& insertionPoint,
				 double height,
				 double width,
				 VAlign valign,
				 HAlign halign,
				 MTextDrawingDirection drawingDirection,
				 MTextLineSpacingStyle lineSpacingStyle,
				 double lineSpacingFactor,
				 const QString& text,
				 const QString& style,
				 double angle,
				 RS2::UpdateMode updateMode = RS2::Update);

	/** Insertion point */
	RS_Vector insertionPoint;
	/** Nominal (initial) text height */
    double height = 0.;
	/** Reference rectangle width */
    double width = 0.;
    /** Vertical alignment */
    VAlign valign = VATop;
	/** Horizontal alignment */
    HAlign halign = HALeft;
	/** Drawing direction */
    MTextDrawingDirection drawingDirection = LeftToRight;
	/** Line spacing style */
    MTextLineSpacingStyle lineSpacingStyle = AtLeast;
	/** Line spacing factor */
    double lineSpacingFactor = 1.;
	/** Text string */
	QString text;
	/** Text style name */
	QString style;
	/** Rotation angle */
    double angle = 0.;
	/** Update mode */
    RS2::UpdateMode updateMode = RS2::NoUpdate;
};

std::ostream& operator << (std::ostream& os, const RS_MTextData& td);


/**
 * Class for a text entity.
 * Please note that text strings can contain special
 * characters such as %%c for a diameter sign as well as unicode
 * characters. Line feeds are stored as real line feeds in the string.
 *
 * @author Andrew Mustun
 */
class RS_MText : public RS_EntityContainer {
public:
    RS_MText(RS_EntityContainer* parent,
            const RS_MTextData& d);
	virtual ~RS_MText() = default;

    virtual RS_Entity* clone() const override;

    /**	@return RS2::EntityText */
    virtual RS2::EntityType rtti() const override{
        return RS2::EntityMText;
    }

    /** @return Copy of data that defines the text. */
    RS_MTextData getData() const {
        return data;
    }

    void update() override;

    int getNumberOfLines();


    RS_Vector getInsertionPoint() {
        return data.insertionPoint;
    }
    double getHeight() {
        return data.height;
    }
    void setHeight(double h) {
        data.height = h;
    }
    double getWidth() {
        return data.width;
    }
    void setAlignment(int a);
    int getAlignment();
    RS_MTextData::VAlign getVAlign() {
        return data.valign;
    }
    void setVAlign(RS_MTextData::VAlign va) {
        data.valign = va;
    }
    RS_MTextData::HAlign getHAlign() {
        return data.halign;
    }
    void setHAlign(RS_MTextData::HAlign ha) {
        data.halign = ha;
    }
    RS_MTextData::MTextDrawingDirection getDrawingDirection() {
        return data.drawingDirection;
    }
    RS_MTextData::MTextLineSpacingStyle getLineSpacingStyle() {
        return data.lineSpacingStyle;
    }
    void setLineSpacingFactor(double f) {
        data.lineSpacingFactor = f;
    }
    double getLineSpacingFactor() {
        return data.lineSpacingFactor;
    }
    void setText(const QString& t);
    QString getText() {
        return data.text;
    }
    void setStyle(const QString& s) {
        data.style = s;
    }
    QString getStyle() {
        return data.style;
    }
    void setAngle(double a) {
        data.angle = a;
    }
    double getAngle() {
        return data.angle;
    }
    double getUsedTextWidth() {
        return usedTextWidth;
    }
    double getUsedTextHeight() {
        return usedTextHeight;
    }

//	virtual double getLength() const {
//		return -1.0;
//	}

    /**
     * @return The insertion point as endpoint.
     */
    virtual RS_Vector getNearestEndpoint(const RS_Vector& coord,
                                         double* dist = NULL)const override;
    virtual RS_VectorSolutions getRefPoints() const override;

    virtual void move(const RS_Vector& offset) override;
    virtual void rotate(const RS_Vector& center, const double& angle) override;
    virtual void rotate(const RS_Vector& center, const RS_Vector& angleVector) override;
    virtual void scale(const RS_Vector& center, const RS_Vector& factor) override;
    virtual void mirror(const RS_Vector& axisPoint1, const RS_Vector& axisPoint2) override;
    virtual bool hasEndpointsWithinWindow(const RS_Vector& v1, const RS_Vector& v2) override;
    virtual void stretch(const RS_Vector& firstCorner,
                         const RS_Vector& secondCorner,
                         const RS_Vector& offset) override;

    friend std::ostream& operator << (std::ostream& os, const RS_Text& p);

    void draw(RS_Painter* painter, RS_GraphicView* view, double& patternOffset) override;

private:
    double updateAddLine(RS_EntityContainer* textLine, int lineCounter);

    void addLetter(RS_EntityContainer& oneLine, QChar letter, RS_Font& font, const RS_Vector& letterSpace, RS_Vector& letterPosition);

protected:
    RS_MTextData data;

    /**
     * Text width used by the current contents of this text entity.
     * This property is updated by the update method.
     * @see update
     */
    double usedTextWidth = 0.;
    /**
     * Text height used by the current contents of this text entity.
     * This property is updated by the update method.
     * @see update
     */
    double usedTextHeight = 0.;
};

#endif
