src/ldtypes.h

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 Santeri Piippo
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  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, see <http://www.gnu.org/licenses/>.
 */

#ifndef LDTYPES_H
#define LDTYPES_H

#include "common.h"
#include "types.h"

#define LDOBJ(T) \
public: \
	virtual ~LD##T##Object() {} \
	virtual LDObject::Type getType() const override { \
		return LDObject::T; \
	} \
	virtual str raw(); \
	virtual LD##T##Object* clone() { \
		return new LD##T##Object (*this); \
	} \
	virtual void move (vertex vVector); \
	virtual void invert();

#define LDOBJ_NAME( N )        virtual str typeName() const override { return #N; }
#define LDOBJ_VERTICES( V )    virtual short vertices() const override { return V; }
#define LDOBJ_SETCOLORED( V )  virtual bool isColored() const override { return V; }
#define LDOBJ_COLORED          LDOBJ_SETCOLORED( true )
#define LDOBJ_UNCOLORED        LDOBJ_SETCOLORED( false )

#define LDOBJ_CUSTOM_SCEMANTIC virtual bool isScemantic() const override
#define LDOBJ_SCEMANTIC        LDOBJ_CUSTOM_SCEMANTIC { return true; }
#define LDOBJ_NON_SCEMANTIC    LDOBJ_CUSTOM_SCEMANTIC { return false; }

#define LDOBJ_SETMATRIX(V)     virtual bool hasMatrix() const override { return V; }
#define LDOBJ_HAS_MATRIX       LDOBJ_SETMATRIX( true )
#define LDOBJ_NO_MATRIX        LDOBJ_SETMATRIX( false )

class QListWidgetItem;
class LDSubfileObject;

// =============================================================================
// LDObject
//
// Base class object for all object types. Each LDObject represents a single line
// in the LDraw code file. The virtual method getType returns an enumerator
// which is a token of the object's type. The object can be casted into
// sub-classes based on this enumerator.
// =============================================================================
class LDObject {
	PROPERTY (bool, hidden, setHidden)
	PROPERTY (bool, selected, setSelected)
	PROPERTY (LDObject*, parent, setParent)
	READ_PROPERTY (int, id, setID)
	DECLARE_PROPERTY (short, color, setColor)

public:
	// Object type codes. Codes are sorted in order of significance.
	enum Type {
		Subfile,        // Object represents a sub-file reference
		Quad,           // Object represents a quadrilateral
		Triangle,       // Object represents a triangle
		Line,           // Object represents a line
		CondLine,       // Object represents a conditional line
		Vertex,         // Object is a vertex, LDForge extension object
		BFC,            // Object represents a BFC statement
		Overlay,        // Object contains meta-info about an overlay image.
		Comment,        // Object represents a comment
		Error,          // Object is the result of failed parsing
		Empty,          // Object represents an empty line
		Unidentified,   // Object is an uninitialized (SHOULD NEVER HAPPEN)
		NumTypes        // Amount of object types
	};

	LDObject();
	virtual ~LDObject();
	
	virtual LDObject* clone() {return 0;}      // Creates a new LDObject identical to this one.
	long getIndex (LDOpenFile* file) const;     // Index (i.e. line number) of this object
	virtual LDObject::Type getType() const;    // Type enumerator of this object
	const vertex& getVertex (int i) const;      // Get a vertex by index
	virtual bool hasMatrix() const;            // Does this object have a matrix and position? (see LDMatrixObject)
	virtual void invert();                     // Inverts this object (winding is reversed)
	virtual bool isColored() const;            // Is this object colored?
	virtual bool isScemantic() const;          // Does this object have meaning in the part model?
	virtual void move (vertex vect);            // Moves this object using the given vertex as a movement vector
	LDObject* next() const;                    // Object after this in the current file
	LDObject* prev() const;                    // Object prior to this in the current file
	virtual str raw() { return ""; }           // This object as LDraw code
	void replace (LDObject* other);             // Replace this LDObject with another LDObject. Object is deleted in the process.
	void setVertex (int i, const vertex& vert); // Set a vertex to the given value
	void setVertexCoord (int i, Axis ax, double value); // Set a single coordinate of a vertex
	void swap (LDObject* other);                // Swap this object with another.
	LDObject* topLevelParent();                // What object in the current file ultimately references this?
	virtual str typeName() const;               // Type name of this object
	virtual short vertices() const;            // Number of vertices this object has
	
	static str typeName (LDObject::Type type); // Get type name by enumerator
	static LDObject* getDefault (const LDObject::Type type); // Returns a sample object by the given enumerator
	static void moveObjects (vector<LDObject*> objs, const bool up); // TODO: move this to LDOpenFile?
	static str objectListContents (const vector<LDObject*>& objs); // Get a description of a list of LDObjects
	static LDObject* fromID (int id);
	
	// TODO: make these private!
	// OpenGL list for this object
	uint glLists[4];
	
	// Object list entry for this object
	QListWidgetItem* qObjListEntry;

protected:
	bool m_glinit;
	friend class GLRenderer;

private:
	vertex m_coords[4];
};

// =============================================================================
// LDMatrixObject
// =============================================================================
//
// Common code for objects with matrices. This class is multiple-derived in
// and thus not used directly other than as a common storage point for matrices
// and vertices.
//
// The link pointer is a pointer to this object's LDObject self - since this is
// multiple-derived in, static_cast or dynamic_cast won't budge here.
//
// In 0.1-alpha, there was a separate 'radial' type which had a position and
// matrix as well. Even though right now only LDSubfile uses this, I'm keeping
// this class distinct in case I get new extension ideas. :)
// =============================================================================
class LDMatrixObject {
	DECLARE_PROPERTY (matrix, transform, setTransform)
	DECLARE_PROPERTY (vertex, position, setPosition)
	PROPERTY (LDObject*, linkPointer, setLinkPointer)

public:
	LDMatrixObject() {}
	LDMatrixObject (const matrix& transform, const vertex& pos) :
		PROP_NAME (transform) (transform), PROP_NAME (position) (pos) {}

	const double& setCoordinate (const Axis ax, double value) {
		vertex v = position();
		v[ax] = value;
		setPosition (v);

		return position() [ax];
	}
};

// =============================================================================
// LDErrorObject
//
// Represents a line in the LDraw file that could not be properly parsed. It is
// represented by a (!) ERROR in the code view. It exists for the purpose of
// allowing garbage lines be debugged and corrected within LDForge. The member
// zContent contains the contents of the unparsable line.
// =============================================================================
class LDErrorObject : public LDObject {
	LDOBJ (Error)
	LDOBJ_NAME (error)
	LDOBJ_VERTICES (0)
	LDOBJ_UNCOLORED
	LDOBJ_SCEMANTIC
	LDOBJ_NO_MATRIX

public:
	LDErrorObject();
	LDErrorObject (str contents, str reason) : contents (contents), reason (reason) {}

	// Content of this unknown line
	str contents;

	// Why is this gibberish?
	str reason;
};

// =============================================================================
// LDEmptyObject
//
// Represents an empty line in the LDraw code file.
// =============================================================================
class LDEmptyObject : public LDObject {
	LDOBJ (Empty)
	LDOBJ_VERTICES (0)
	LDOBJ_UNCOLORED
	LDOBJ_NON_SCEMANTIC
	LDOBJ_NO_MATRIX
};

// =============================================================================
// LDCommentObject
//
// Represents a code-0 comment in the LDraw code file. Member text contains
// the text of the comment.
// =============================================================================
class LDCommentObject : public LDObject {
	LDOBJ (Comment)
	LDOBJ_NAME (comment)
	LDOBJ_VERTICES (0)
	LDOBJ_UNCOLORED
	LDOBJ_NON_SCEMANTIC
	LDOBJ_NO_MATRIX

public:
	LDCommentObject() {}
	LDCommentObject (str text) : text (text) {}

	str text; // The text of this comment
};

// =============================================================================
// LDBFCObject
//
// Represents a 0 BFC statement in the LDraw code. eStatement contains the type
// of this statement.
// =============================================================================
class LDBFCObject : public LDObject {
public:
	enum Type {
		CertifyCCW,
		CCW,
		CertifyCW,
		CW,
		NoCertify,
		InvertNext,
		NumStatements
	};
	
	LDOBJ (BFC)
	LDOBJ_NAME (bfc)
	LDOBJ_VERTICES (0)
	LDOBJ_UNCOLORED
	LDOBJ_CUSTOM_SCEMANTIC { return (type == InvertNext); }
	LDOBJ_NO_MATRIX
	
public:
	LDBFCObject() {}
	LDBFCObject (const LDBFCObject::Type type) : type (type) {}

	// Statement strings
	static const char* statements[];

	Type type;
};

// =============================================================================
// LDSubfileObject
//
// Represents a single code-1 subfile reference.
// =============================================================================
class LDSubfileObject : public LDObject, public LDMatrixObject {
	LDOBJ (Subfile)
	LDOBJ_NAME (subfile)
	LDOBJ_VERTICES (0)
	LDOBJ_COLORED
	LDOBJ_SCEMANTIC
	LDOBJ_HAS_MATRIX
	PROPERTY (LDOpenFile*, fileInfo, setFileInfo)

public:
	LDSubfileObject() {
		setLinkPointer (this);
	}

	// Inlines this subfile. Note that return type is an array of heap-allocated
	// LDObject-clones, they must be deleted one way or another.
	vector<LDObject*> inlineContents (bool deep, bool cache);
};

// =============================================================================
// LDLineObject
//
// Represents a single code-2 line in the LDraw code file. v0 and v1 are the end
// points of the line. The line is colored with dColor unless uncolored mode is
// set.
// =============================================================================
class LDLineObject : public LDObject {
	LDOBJ (Line)
	LDOBJ_NAME (line)
	LDOBJ_VERTICES (2)
	LDOBJ_COLORED
	LDOBJ_SCEMANTIC
	LDOBJ_NO_MATRIX

public:
	LDLineObject() {}
	LDLineObject (vertex v1, vertex v2);
};

// =============================================================================
// LDCondLineObject
//
// Represents a single code-5 conditional line. The end-points v0 and v1 are
// inherited from LDLine, c0 and c1 are the control points of this line.
// =============================================================================
class LDCondLineObject : public LDLineObject {
	LDOBJ (CondLine)
	LDOBJ_NAME (condline)
	LDOBJ_VERTICES (4)
	LDOBJ_COLORED
	LDOBJ_SCEMANTIC
	LDOBJ_NO_MATRIX

public:
	LDCondLineObject() {}
	LDLineObject* demote();
};

// =============================================================================
// LDTriangleObject
//
// Represents a single code-3 triangle in the LDraw code file. Vertices v0, v1
// and v2 contain the end-points of this triangle. dColor is the color the
// triangle is colored with.
// =============================================================================
class LDTriangleObject : public LDObject {
	LDOBJ (Triangle)
	LDOBJ_NAME (triangle)
	LDOBJ_VERTICES (3)
	LDOBJ_COLORED
	LDOBJ_SCEMANTIC
	LDOBJ_NO_MATRIX

public:
	LDTriangleObject() {}
	LDTriangleObject (vertex v0, vertex v1, vertex v2) {
		setVertex (0, v0);
		setVertex (1, v1);
		setVertex (2, v2);
	}
};

// =============================================================================
// LDQuadObject
//
// Represents a single code-4 quadrilateral. v0, v1, v2 and v3 are the end points
// of the quad, dColor is the color used for the quad.
// =============================================================================
class LDQuadObject : public LDObject {
public:
	LDOBJ (Quad)
	LDOBJ_NAME (quad)
	LDOBJ_VERTICES (4)
	LDOBJ_COLORED
	LDOBJ_SCEMANTIC
	LDOBJ_NO_MATRIX

	LDQuadObject() {}

	// Split this quad into two triangles (note: heap-allocated)
	vector<LDTriangleObject*> splitToTriangles();
};

// =============================================================================
// LDVertexObject
//
// The vertex is an LDForce-specific extension which represents a single
// vertex which can be used as a parameter to tools or to store coordinates
// with. Vertices are a part authoring tool and they should not appear in
// finished parts.
// =============================================================================
class LDVertexObject : public LDObject {
public:
	LDOBJ (Vertex)
	LDOBJ_NAME (vertex)
	LDOBJ_VERTICES (0) // TODO: move pos to vaCoords[0]
	LDOBJ_COLORED
	LDOBJ_NON_SCEMANTIC
	LDOBJ_NO_MATRIX

	LDVertexObject() {}

	vertex pos;
};

// =============================================================================
// LDOverlayObject
//
// Overlay image meta, stored in the header of parts so as to preserve overlay
// information.
// =============================================================================
class LDOverlayObject : public LDObject {
	LDOBJ (Overlay)
	LDOBJ_NAME (overlay)
	LDOBJ_VERTICES (0)
	LDOBJ_UNCOLORED
	LDOBJ_NON_SCEMANTIC
	LDOBJ_NO_MATRIX
	PROPERTY (int, camera, setCamera)
	PROPERTY (int, x, setX)
	PROPERTY (int, y, setY)
	PROPERTY (int, width, setWidth)
	PROPERTY (int, height, setHeight)
	PROPERTY (str, filename, setFilename)
};

#endif // LDTYPES_H