src/ldDocument.h

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013, 2014 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/>.
 */

#pragma once
#include <QObject>
#include "main.h"
#include "ldObject.h"
#include "editHistory.h"
#include "glShared.h"

class History;
class OpenProgressDialog;
class LDDocumentPointer;
struct LDGLData;
class GLCompiler;

namespace LDPaths
{
	void initPaths();
	bool tryConfigure (QString path);

	QString ldconfig();
	QString prims();
	QString parts();
	QString getError();
}

//
// Flags for LDDocument
//
enum LDDocumentFlag
{
	DOCF_IsBeingDestroyed = (1 << 0),
};

Q_DECLARE_FLAGS (LDDocumentFlags, LDDocumentFlag)
Q_DECLARE_OPERATORS_FOR_FLAGS (LDDocumentFlags)

// =============================================================================
//
// This class stores a document either as a editable file for the user or for
// subfile caching. Its methods handle file input and output.
//
// A file is implicit when they are opened automatically for caching purposes
// and are hidden from the user. User-opened files are explicit (not implicit).
//
// The default name is a placeholder, initially suggested name for a file. The
// primitive generator uses this to give initial names to primitives.
//
class LDDocument : public QObject
{
	public:
		using ReferenceList = QList<LDDocumentPointer*>;
		using KnownVertexMap = QMap<Vertex, int>;

		Q_OBJECT
		PROPERTY (public,	QString,		name,			setName,			STOCK_WRITE)
		PROPERTY (private,	LDObjectList,	objects, 		setObjects,			STOCK_WRITE)
		PROPERTY (private,	LDObjectList,	cache, 			setCache,			STOCK_WRITE)
		PROPERTY (private,	History*,		history,		setHistory,			STOCK_WRITE)
		PROPERTY (private,	KnownVertexMap,	vertices,		setVertices,		STOCK_WRITE)
		PROPERTY (private,	ReferenceList,	references,		setReferences,		STOCK_WRITE)
		PROPERTY (public,	QString,		fullPath,		setFullPath,		STOCK_WRITE)
		PROPERTY (public,	QString,		defaultName,	setDefaultName,		STOCK_WRITE)
		PROPERTY (public,	bool,			isImplicit,		setImplicit,		STOCK_WRITE)
		PROPERTY (public,	long,			savePosition,	setSavePosition,	STOCK_WRITE)
		PROPERTY (public,	int,			tabIndex,		setTabIndex,		STOCK_WRITE)
		PROPERTY (public,	QList<LDPolygon>,	polygonData,	setPolygonData,	STOCK_WRITE)
		PROPERTY (private,	LDDocumentFlags,	flags,			setFlags,		STOCK_WRITE)

	public:
		LDDocument();
		~LDDocument();

		int addObject (LDObject* obj); // Adds an object to this file at the end of the file.
		void addObjects (const LDObjectList objs);
		void clearSelection();
		void forgetObject (LDObject* obj); // Deletes the given object from the object chain.
		QString getDisplayName();
		const LDObjectList& getSelection() const;
		bool hasUnsavedChanges() const; // Does this document have unsaved changes?
		void initializeGLData();
		LDObjectList inlineContents (bool deep, bool renderinline);
		void insertObj (int pos, LDObject* obj);
		int getObjectCount() const;
		LDObject* getObject (int pos) const;
		bool save (QString path = ""); // Saves this file to disk.
		void swapObjects (LDObject* one, LDObject* other);
		bool isSafeToClose(); // Perform safety checks. Do this before closing any files!
		void setObject (int idx, LDObject* obj);
		void addReference (LDDocumentPointer* ptr);
		void removeReference (LDDocumentPointer* ptr);
		QList<LDPolygon> inlinePolygons();
		void vertexChanged (const Vertex& a, const Vertex& b);
		void addKnownVerticesOf(LDObject* obj);
		void removeKnownVerticesOf (LDObject* sub);

		inline LDDocument& operator<< (LDObject* obj)
		{
			addObject (obj);
			return *this;
		}

		inline void addHistoryStep()
		{
			history()->addStep();
		}

		inline void undo()
		{
			history()->undo();
		}

		inline void redo()
		{
			history()->redo();
		}

		inline void clearHistory()
		{
			history()->clear();
		}

		inline void addToHistory (AbstractHistoryEntry* entry)
		{
			*history() << entry;
		}

		static void closeUnused();
		static LDDocument* current();
		static void setCurrent (LDDocument* f);
		static void closeInitialFile();
		static int countExplicitFiles();

		// Turns a full path into a relative path
		static QString shortenName (QString a);

	protected:
		void addToSelection (LDObject* obj);
		void removeFromSelection (LDObject* obj);

		LDGLData* getGLData()
		{
			return m_gldata;
		}

		friend class LDObject;
		friend class GLRenderer;

	private:
		LDObjectList			m_sel;
		LDGLData*				m_gldata;

		// If set to true, next polygon inline of this document discards the
		// stored polygon data and re-builds it.
		bool					m_needsGLReInit;

		static LDDocument*		m_curdoc;

		void addKnownVertexReference (const Vertex& a);
		void removeKnownVertexReference (const Vertex& a);
};

inline LDDocument* getCurrentDocument()
{
	return LDDocument::current();
}

// Close all current loaded files and start off blank.
void newFile();

// Opens the given file as the main file. Everything is closed first.
void openMainFile (QString path);

// Finds an OpenFile by name or null if not open
LDDocument* findDocument (QString name);

// Opens the given file and parses the LDraw code within. Returns a pointer
// to the opened file or null on error.
LDDocument* openDocument (QString path, bool search, bool implicit);

// Opens the given file and returns a pointer to it, potentially looking in /parts and /p
QFile* openLDrawFile (QString relpath, bool subdirs, QString* pathpointer = null);

// Close all open files, whether user-opened or subfile caches.
void closeAll();

// Parses a string line containing an LDraw object and returns the object parsed.
LDObject* parseLine (QString line);

// Retrieves the pointer to the given document by file name. Document is loaded
// from file if necessary. Can return null if neither succeeds.
LDDocument* getDocument (QString filename);

// Re-caches all subfiles.
void reloadAllSubfiles();

// Is it safe to close all files?
bool safeToCloseAll();

LDObjectList loadFileContents (QFile* f, int* numWarnings, bool* ok = null);

extern QList<LDDocument*> g_loadedFiles;

inline const LDObjectList& selection()
{
	return getCurrentDocument()->getSelection();
}

void addRecentFile (QString path);
void loadLogoedStuds();
QString basename (QString path);
QString dirname (QString path);

extern QList<LDDocument*> g_loadedFiles; // Vector of all currently opened files.

// =============================================================================
//
// LDFileLoader
//
// Loads the given file and parses it to LDObjects using parseLine. It's a
// separate class so as to be able to do the work progressively through the
// event loop, allowing the program to maintain responsivity during loading.
//
class LDFileLoader : public QObject
{
	Q_OBJECT
	PROPERTY (private,	LDObjectList,	objects,		setObjects,			STOCK_WRITE)
	PROPERTY (private,	bool,			isDone,			setDone,			STOCK_WRITE)
	PROPERTY (private,	int,			progress,		setProgress,		STOCK_WRITE)
	PROPERTY (private,	bool,			isAborted,		setAborted,			STOCK_WRITE)
	PROPERTY (public,	QStringList,	lines,			setLines,			STOCK_WRITE)
	PROPERTY (public,	int*,			warnings,		setWarnings,		STOCK_WRITE)
	PROPERTY (public,	bool,			isOnForeground,	setOnForeground,	STOCK_WRITE)

	public slots:
		void start();
		void abort();

	private:
		OpenProgressDialog* dlg;

	private slots:
		void work (int i);

	signals:
		void progressUpdate (int progress);
		void workDone();
};