/* poppler-private.h: qt interface to poppler
 * Copyright (C) 2005, Net Integration Technologies, Inc.
 * Copyright (C) 2006 by Albert Astals Cid <aacid@kde.org>
 * Inspired on code by
 * Copyright (C) 2004 by Albert Astals Cid <tsdgeos@terra.es>
 * Copyright (C) 2004 by Enrico Ros <eros.kde@email.it>
 *
 * 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 2, 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <GfxState.h>
#include <GlobalParams.h>
#include <Link.h>
#include <Outline.h>
#include <PDFDoc.h>
#include <FontInfo.h>
#include <SplashOutputDev.h>
#include <UGooString.h>


namespace Poppler {

    /* borrowed from kpdf */
    static QString unicodeToQString(Unicode* u, int len) {
	QString ret;
	ret.resize(len);
	QChar* qch = (QChar*) ret.unicode();
	for (;len;--len)
	    *qch++ = (QChar) *u++;
	return ret;
    }

    static UGooString *QStringToUGooString(const QString &s) {
	int len = s.length();
	Unicode *u = (Unicode *)gmallocn(s.length(), sizeof(Unicode));
	for (int i = 0; i < len; ++i)
		u[i] = s.at(i).unicode();
	return new UGooString(u, len);
    }

    class LinkDestinationData
    {
        public:
		LinkDestinationData( LinkDest *l, UGooString *nd, Poppler::DocumentData *pdfdoc ) : ld(l), namedDest(nd), doc(pdfdoc)
		{
		}
	
	LinkDest *ld;
	UGooString *namedDest;
	Poppler::DocumentData *doc;
    };

    class DocumentData {
    public:
	DocumentData(GooString *filePath, GooString *ownerPassword, GooString *userPassword) :
	    doc(filePath, ownerPassword, userPassword), m_fontInfoScanner(0), m_splashOutputDev(0)
	    {
		paperColor = Qt::white;
		// It might be more appropriate to delete these in PDFDoc
		delete ownerPassword;
		delete userPassword;
		
		if ( count == 0 ) globalParams = new GlobalParams("/etc/xpdfrc");
		count ++;
	    }
	
	~DocumentData()
	{
		qDeleteAll(m_embeddedFiles);
		delete m_splashOutputDev;
		delete m_fontInfoScanner;
		
		count --;
		if ( count == 0 ) delete globalParams;
	}
	
	SplashOutputDev *getSplashOutputDev()
	{
		if (!m_splashOutputDev)
		{
			SplashColor bgColor;
			bgColor[0] = paperColor.red();
			bgColor[1] = paperColor.green();
			bgColor[2] = paperColor.blue();
			m_splashOutputDev = new SplashOutputDev(splashModeRGB8Qt, 4, gFalse, bgColor);
			m_splashOutputDev->startDoc(doc.getXRef());
		}
		return m_splashOutputDev;
	}
	
	void addTocChildren( QDomDocument * docSyn, QDomNode * parent, GooList * items )
	{
		int numItems = items->getLength();
		for ( int i = 0; i < numItems; ++i )
		{
			// iterate over every object in 'items'
			OutlineItem * outlineItem = (OutlineItem *)items->get( i );
			
			// 1. create element using outlineItem's title as tagName
			QString name;
			Unicode * uniChar = outlineItem->getTitle();
			int titleLength = outlineItem->getTitleLength();
			name = unicodeToQString(uniChar, titleLength);
			if ( name.isEmpty() )
				continue;
			
			QDomElement item = docSyn->createElement( name );
			parent->appendChild( item );
			
			// 2. find the page the link refers to
			::LinkAction * a = outlineItem->getAction();
			if ( a && ( a->getKind() == actionGoTo || a->getKind() == actionGoToR ) )
			{
				// page number is contained/referenced in a LinkGoTo
				LinkGoTo * g = static_cast< LinkGoTo * >( a );
				LinkDest * destination = g->getDest();
				if ( !destination && g->getNamedDest() )
				{
					// no 'destination' but an internal 'named reference'. we could
					// get the destination for the page now, but it's VERY time consuming,
					// so better storing the reference and provide the viewport on demand
					UGooString *s = g->getNamedDest();
					QString aux = unicodeToQString( s->unicode(), s->getLength() );
					item.setAttribute( "DestinationName", aux );
				}
				else if ( destination && destination->isOk() )
				{
					LinkDestinationData ldd(destination, NULL, this);
					item.setAttribute( "Destination", LinkDestination(ldd).toString() );
				}
				if ( a->getKind() == actionGoToR )
				{
					LinkGoToR * g2 = static_cast< LinkGoToR * >( a );
					item.setAttribute( "ExternalFileName", g2->getFileName()->getCString() );
				}
			}
			
			// 3. recursively descend over children
			outlineItem->open();
			GooList * children = outlineItem->getKids();
			if ( children )
				addTocChildren( docSyn, &item, children );
		}
	}
	
	void setPaperColor(const QColor &color)
	{
		if (color != paperColor)
		{
			paperColor = color;
			delete m_splashOutputDev;
			m_splashOutputDev = NULL;
		}
	}

	class PDFDoc doc;
	bool locked;
	FontInfoScanner *m_fontInfoScanner;
	SplashOutputDev *m_splashOutputDev;
	QList<EmbeddedFile*> m_embeddedFiles;
	QColor paperColor;
	static int count;
    };

    class FontInfoData
    {
	public:
		FontInfoData( const FontInfoData &fid )
		{
			fontName = fid.fontName;
			fontFile = fid.fontFile;
			isEmbedded = fid.isEmbedded;
			isSubset = fid.isSubset;
			type = fid.type;
		}
		
		FontInfoData( ::FontInfo* fi )
		{
			if (fi->getName()) fontName = fi->getName()->getCString();
			if (fi->getFile()) fontFile = fi->getFile()->getCString();
			isEmbedded = fi->getEmbedded();
			isSubset = fi->getSubset();
			type = (Poppler::FontInfo::Type)fi->getType();
		}

		QString fontName;
		QString fontFile;
		bool isEmbedded;
		bool isSubset;
		FontInfo::Type type;
    };

    class TextBoxData
    {
	public:
		QString text;
		QRectF bBox;
		TextBox *nextWord;
		QVector<double> edge;	// "near" edge x or y coord of each char
					//   (plus one extra entry for the last char)
		bool hasSpaceAfter;
    };

}