/**
 * \file insetquotes.C
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Jean-Marc Lasgouttes
 *
 * Full author contact details are available in file CREDITS
 */

#include <config.h>

#include "insetquotes.h"

#include "buffer.h"
#include "BufferView.h"
#include "debug.h"
#include "dimension.h"
#include "language.h"
#include "LaTeXFeatures.h"
#include "latexrunparams.h"
#include "lyxfont.h"
#include "lyxlex.h"
#include "lyxrc.h"
#include "paragraph.h"
#include "metricsinfo.h"
#include "frontends/font_metrics.h"
#include "frontends/Painter.h"
#include "support/LAssert.h"
#include "support/lstrings.h"

using namespace lyx::support;

using std::ostream;
using std::endl;

namespace {

// codes used to read/write quotes to LyX files
char const * const language_char = "esgpfa";
char const * const side_char = "lr" ;
char const * const times_char = "sd";

// List of known quote chars
char const * const quote_char = ",'`<>";

// Index of chars used for the quote. Index is [side, language]
int quote_index[2][6] = {
	{ 2, 1, 0, 0, 3, 4 },    // "'',,<>"
	{ 1, 1, 2, 1, 4, 3 } };  // "`'`'><"

// Corresponding LaTeX code, for double and single quotes.
char const * const latex_quote_t1[2][5] =
{ { "\\quotesinglbase ",  "'", "`",
    "\\guilsinglleft{}", "\\guilsinglright{}" },
  { ",,", "''", "``", "<<", ">>" } };

char const * const latex_quote_ot1[2][5] =
{ { "\\quotesinglbase ",  "'", "`",
    "\\guilsinglleft{}", "\\guilsinglright{}" },
  { "\\quotedblbase ", "''", "``",
    "\\guillemotleft{}", "\\guillemotright{}" } };

char const * const latex_quote_babel[2][5] =
{ { "\\glq ",  "'", "`", "\\flq{}", "\\frq{}" },
  { "\\glqq ", "''", "``", "\\flqq{}", "\\frqq{}" } };

} // namespace anon


InsetQuotes::InsetQuotes(string const & str)
{
	parseString(str);
}


InsetQuotes::InsetQuotes(quote_language l, quote_side s, quote_times t)
	: language_(l), side_(s), times_(t)
{}


InsetQuotes::InsetQuotes(char c, BufferParams const & params)
	: language_(params.quotes_language), times_(params.quotes_times)
{
	// Decide whether left or right
	switch (c) {
	case ' ': case '(':
#warning eh ? I am lost here ...
	//case Paragraph::META_HFILL:
	// case Paragraph::META_NEWLINE:
		side_ = LeftQ;   // left quote
		break;
	default:
		side_ = RightQ;  // right quote
	}
}


void InsetQuotes::parseString(string const & s)
{
	string str(s);
	if (str.length() != 3) {
		lyxerr << "ERROR (InsetQuotes::InsetQuotes):"
			" bad string length." << endl;
		str = "eld";
	}

	int i;

	for (i = 0; i < 6; ++i) {
		if (str[0] == language_char[i]) {
			language_ = quote_language(i);
			break;
		}
	}
	if (i >= 6) {
		lyxerr << "ERROR (InsetQuotes::InsetQuotes):"
			" bad language specification." << endl;
		language_ = EnglishQ;
	}

	for (i = 0; i < 2; ++i) {
		if (str[1] == side_char[i]) {
			side_ = quote_side(i);
			break;
		}
	}
	if (i >= 2) {
		lyxerr << "ERROR (InsetQuotes::InsetQuotes):"
			" bad side specification." << endl;
		side_ = LeftQ;
	}

	for (i = 0; i < 2; ++i) {
		if (str[2] == times_char[i]) {
			times_ = quote_times(i);
			break;
		}
	}
	if (i >= 2) {
		lyxerr << "ERROR (InsetQuotes::InsetQuotes):"
			" bad times specification." << endl;
		times_ = DoubleQ;
	}
}


string const InsetQuotes::dispString(Language const * loclang) const
{
	string disp;
	disp += quote_char[quote_index[side_][language_]];
	if (times_ == DoubleQ)
		disp += disp;

	if (lyxrc.font_norm_type == LyXRC::ISO_8859_1
	    || lyxrc.font_norm_type == LyXRC::ISO_8859_9
	    || lyxrc.font_norm_type == LyXRC::ISO_8859_15) {
		if (disp == "<<")
			disp = '«';
		else if (disp == ">>")
			disp = '»';
	}

	// in french, spaces are added inside double quotes
	if (times_ == DoubleQ && prefixIs(loclang->code(), "fr")) {
		if (side_ == LeftQ)
			disp += ' ';
		else
			disp.insert(string::size_type(0), 1, ' ');
	}

	return disp;
}


void InsetQuotes::metrics(MetricsInfo & mi, Dimension & dim) const
{
	LyXFont & font = mi.base.font;
	dim.asc = font_metrics::maxAscent(font);
	dim.des = font_metrics::maxDescent(font);
	dim.wid = 0;

	string const text = dispString(font.language());
	for (string::size_type i = 0; i < text.length(); ++i) {
		if (text[i] == ' ')
			dim.wid += font_metrics::width('i', font);
		else if (i == 0 || text[i] != text[i - 1])
			dim.wid += font_metrics::width(text[i], font);
		else
			dim.wid += font_metrics::width(',', font);
	}
	dim_ = dim;
}


#if 0
LyXFont const InsetQuotes::convertFont(LyXFont const & f) const
{
#if 1
	return f;
#else
	LyXFont font(f);
	return font;
#endif
}
#endif


void InsetQuotes::draw(PainterInfo & pi, int x, int y) const
{
	string const text = dispString(pi.base.font.language());

	if (text.length() == 2 && text[0] == text[1]) {
		pi.pain.text(x, y, text[0], pi.base.font);
		int const t = font_metrics::width(',', pi.base.font);
		pi.pain.text(x + t, y, text[0], pi.base.font);
	} else {
		pi.pain.text(x, y, text, pi.base.font);
	}
}


void InsetQuotes::write(Buffer const *, ostream & os) const
{
	string text;
	text += language_char[language_];
	text += side_char[side_];
	text += times_char[times_];
	os << "Quotes " << text;
}


void InsetQuotes::read(Buffer const *, LyXLex & lex)
{
	lex.nextToken();
	parseString(lex.getString());
	lex.next();
	if (lex.getString() != "\\end_inset") {
		lex.printError("Missing \\end_inset at this point");
	}
}


int InsetQuotes::latex(Buffer const * buf, ostream & os,
		       LatexRunParams const & runparams) const
{
	// How do we get the local language here??
	lyx::pos_type curr_pos = parOwner()->getPositionOfInset(this);
	Assert(curr_pos != -1);

#warning FIXME. We _must_ find another way to get the language. (Lgb)
#if 0
	// This cannot be used. (Lgb)
	string const curr_lang =
		parOwner()->getFont(buf->params,
				    curr_pos).language()->babel();
#else
	// And this is not the way... (Lgb)
	string const curr_lang = buf->params.language->lang();
#endif
	const int quoteind = quote_index[side_][language_];
	string qstr;

	if (language_ == FrenchQ && times_ == DoubleQ
	    && curr_lang == "frenchb") {
		if (side_ == LeftQ)
			qstr = "\\og "; //the spaces are important here
		else
			qstr = " \\fg{}"; //and here
	} else if (language_ == FrenchQ && times_ == DoubleQ
		   && curr_lang == "french") {
		if (side_ == LeftQ)
			qstr = "<< "; //the spaces are important here
		else
			qstr = " >>"; //and here
	} else if (lyxrc.fontenc == "T1") {
		qstr = latex_quote_t1[times_][quoteind];
#ifdef DO_USE_DEFAULT_LANGUAGE
	} else if (doclang == "default") {
#else
	} else if (!runparams.use_babel) {
#endif
		qstr = latex_quote_ot1[times_][quoteind];
	} else {
		qstr = latex_quote_babel[times_][quoteind];
	}

	// Always guard against unfortunate ligatures (!` ?`)
	if (prefixIs(qstr, "`"))
		qstr.insert(0, "{}");

	os << qstr;
	return 0;
}


int InsetQuotes::ascii(Buffer const *, ostream & os, int) const
{
	os << '"';
	return 0;
}


int InsetQuotes::linuxdoc(Buffer const *, ostream & os) const
{
	os << '"';
	return 0;
}


int InsetQuotes::docbook(Buffer const *, ostream & os, bool) const
{
	if (times_ == DoubleQ) {
		if (side_ == LeftQ)
			os << "&ldquo;";
		else
			os << "&rdquo;";
	} else {
		if (side_ == LeftQ)
			os << "&lsquo;";
		else
			os << "&rsquo;";
	}
	return 0;
}


void InsetQuotes::validate(LaTeXFeatures & features) const
{
	bool const use_babel = features.useBabel();
	char type = quote_char[quote_index[side_][language_]];

#ifdef DO_USE_DEFAULT_LANGUAGE
	if (features.bufferParams().language->lang() == "default"
#else
	if (!use_babel
#endif
	    && lyxrc.fontenc != "T1") {
		if (times_ == SingleQ)
			switch (type) {
				case ',': features.require("quotesinglbase");  break;
			case '<': features.require("guilsinglleft");  break;
			case '>': features.require("guilsinglright"); break;
			default: break;
			}
		else
			switch (type) {
			case ',': features.require("quotedblbase");   break;
			case '<': features.require("guillemotleft");  break;
			case '>': features.require("guillemotright"); break;
			default: break;
			}
	}
}


InsetBase * InsetQuotes::clone() const
{
	return new InsetQuotes(language_, side_, times_);
}


Inset::Code InsetQuotes::lyxCode() const
{
  return Inset::QUOTE_CODE;
}