/**
 * \file PDFoptions.cpp
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Pavel Sanda
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "PDFOptions.h"

#include "Lexer.h"

#include "support/convert.h"
#include "support/debug.h"
#include "support/lstrings.h"

#include <sstream>
#include <string>

using namespace std;
using namespace lyx::support;

namespace lyx {


const string PDFOptions::pagemode_fullscreen("FullScreen");

bool PDFOptions::empty() const
{
	PDFOptions x; //implicit hyperref settings

	return  author == x.author
		&& title == x.title
		&& subject == x.subject
		&& keywords == x.keywords
		&& pagemode == x.pagemode
		&& quoted_options == x.quoted_options
		&& bookmarks == x.bookmarks
		&& bookmarksnumbered == x.bookmarksnumbered
		&& bookmarksopen == x.bookmarksopen
		&& bookmarksopenlevel == x.bookmarksopenlevel
		&& breaklinks == x.breaklinks
		&& pdfborder == x.pdfborder
		&& colorlinks == x.colorlinks
		&& backref == x.backref
		&& pdfusetitle == x.pdfusetitle;
}


void PDFOptions::writeFile(ostream & os) const
{
	os << "\\use_hyperref " << convert<string>(use_hyperref) << '\n';
	if (!use_hyperref && empty())
		return;
	
	if (!title.empty() )
		os << "\\pdf_title \"" << title << "\"\n";
	if (!author.empty())
		os << "\\pdf_author \"" << author << "\"\n";
	if (!subject.empty())
		os << "\\pdf_subject \"" << subject << "\"\n";
	if (!keywords.empty())
		os << "\\pdf_keywords \"" << keywords << "\"\n";
	
	
	os << "\\pdf_bookmarks " << convert<string>(bookmarks) << '\n';
	os << "\\pdf_bookmarksnumbered " << convert<string>(bookmarksnumbered) << '\n';
	os << "\\pdf_bookmarksopen " << convert<string>(bookmarksopen) << '\n';
	os << "\\pdf_bookmarksopenlevel " << bookmarksopenlevel << '\n';
	
	os << "\\pdf_breaklinks "  << convert<string>(breaklinks)  << '\n';
	os << "\\pdf_pdfborder "   << convert<string>(pdfborder)   << '\n';
	os << "\\pdf_colorlinks "  << convert<string>(colorlinks)  << '\n';
	os << "\\pdf_backref "     << backref << '\n';
	os << "\\pdf_pdfusetitle " << convert<string>(pdfusetitle) << '\n';
	
	if (!pagemode.empty())
		os << "\\pdf_pagemode " << pagemode << '\n';
	
	if (!quoted_options.empty())
		os << "\\pdf_quoted_options \"" << quoted_options << "\"\n";
}


void PDFOptions::writeLaTeX(odocstream & os, bool hyperref_already_provided) const
{
	string opt;
	
	// since LyX uses unicode, also set the PDF strings to unicode strings with the
	// hyperref option "unicode"
	opt += "unicode=true, ";
	
	// try to extract author and title from document when none is
	// explicitly given
	if (pdfusetitle && title.empty() && author.empty())
		opt += "pdfusetitle,";
	opt += "\n ";

	opt += "bookmarks=" + convert<string>(bookmarks) + ',';
	if (bookmarks) {
		opt += "bookmarksnumbered=" + convert<string>(bookmarksnumbered) + ',';
		opt += "bookmarksopen=" + convert<string>(bookmarksopen) + ',';
		if (bookmarksopen)
			opt += "bookmarksopenlevel=" + convert<string>(bookmarksopenlevel) + ',';
	}
	opt += "\n ";
	opt += "breaklinks="     + convert<string>(breaklinks) + ',';

	opt += "pdfborder={0 0 " ;
	opt += (pdfborder ?'0':'1');
	opt += "},";

	opt += "backref=" + backref + ',';
	opt += "colorlinks="     + convert<string>(colorlinks) + ',';
	if (!pagemode.empty())
		opt += "pdfpagemode=" + pagemode + ',';
	


	// load the pdftitle etc. as hypersetup, otherwise you'll get
	// LaTeX-errors when using non-latin characters
	string hyperset;
	if (!title.empty())
		hyperset += "pdftitle={"   + title + "},";
	if (!author.empty())
		hyperset += "\n pdfauthor={"  + author + "},";
	if (!subject.empty())
		hyperset += "\n pdfsubject={" + subject + "},";
	if (!keywords.empty())
		hyperset += "\n pdfkeywords={" + keywords + "},";
	if (!quoted_options.empty()){
		hyperset += "\n ";
		hyperset += quoted_options;
	}
	hyperset = rtrim(hyperset,",");


	// use in \\usepackage parameter as not all options can be handled inside \\hypersetup
	if (!hyperref_already_provided) {
		opt = rtrim(opt,",");
		opt = "\\usepackage[" + opt + "]\n {hyperref}\n";

		if (!hyperset.empty())
			opt += "\\hypersetup{" + hyperset + "}\n ";
	} else
		// only in case hyperref is already loaded by the current text class
		// try to put it into hyperset
		//
		// FIXME: this still does not fix the cases where hyperref is loaded
		//        and the option is active only when part of usepackage parameter
		//        (e.g. pdfusetitle).
		{
			opt = "\\hypersetup{" + opt + hyperset + "}\n ";
		}
	
	// FIXME UNICODE
	os << from_utf8(opt);
}


string PDFOptions::readToken(Lexer &lex, string const & token)
{
	if (token == "\\use_hyperref") {
		lex >> use_hyperref;
	} else if (token == "\\pdf_title") {
		lex >> title;
	} else if (token == "\\pdf_author") {
		lex >> author;
	} else if (token == "\\pdf_subject") {
		lex >> subject;
	} else if (token == "\\pdf_keywords") {
		lex >> keywords;
	} else if (token == "\\pdf_bookmarks") {
		lex >> bookmarks;
	} else if (token == "\\pdf_bookmarksnumbered") {
		lex >> bookmarksnumbered;
	} else if (token == "\\pdf_bookmarksopen") {
		lex >> bookmarksopen;
	} else if (token == "\\pdf_bookmarksopenlevel") {
		lex >> bookmarksopenlevel;
	} else if (token == "\\pdf_breaklinks") {
		lex >> breaklinks;
	} else if (token == "\\pdf_pdfborder") {
		lex >> pdfborder;
	} else if (token == "\\pdf_colorlinks") {
		lex >> colorlinks;
	} else if (token == "\\pdf_backref") {
		lex >> backref;
	} else if (token == "\\pdf_pdfusetitle") {
		lex >> pdfusetitle;
	} else if (token == "\\pdf_pagemode") {
		lex >> pagemode;
	} else if (token == "\\pdf_quoted_options") {
		lex >> quoted_options;
	} else {
		return token;
	}
	return string();
}


// check the string from UI
string PDFOptions::quoted_options_check(string const str) const
{
	return subst(str, "\n", "");
}


// set implicit settings for hyperref
void PDFOptions::clear()
{
	use_hyperref            = false;
	title.clear();
	author.clear();
	subject.clear();
	keywords.clear();
	bookmarks               = true;
	bookmarksnumbered       = false;
	bookmarksopen           = false;
	bookmarksopenlevel	= 1;
	breaklinks              = false;
	pdfborder               = false;
	colorlinks              = false;
	backref                 = "false";
	pagemode.clear();
	quoted_options.clear();
	pdfusetitle             = true;  //in contrast with hyperref
}

} // namespace lyx