// -*- C++ -*-
/**
 * \file src/FontInfo.h
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Lars Gullik Bjønnes
 * \author Jean-Marc Lasgouttes
 * \author Angus Leeming
 * \author Dekel Tsur
 *
 * Full author contact details are available in file CREDITS.
 */

#ifndef FONT_PROPERTIES_H
#define FONT_PROPERTIES_H

#include "Color.h"
#include "ColorCode.h"
#include "FontEnums.h"

#include "support/Changer.h"
#include "support/strfwd.h"


namespace lyx {

namespace support { class Lexer; }

///
class FontInfo
{
public:
	///
	FontInfo();
	///
	FontInfo(
		FontFamily family,
		FontSeries series,
		FontShape  shape,
		FontSize   size,
		MathStyle  style,
		ColorCode  color,
		ColorCode  background,
		FontState  emph,
		FontState  underbar,
		FontState  strikeout,
		FontState  xout,
		FontState  uuline,
		FontState  uwave,
		FontState  noun,
		FontState  number,
		FontState  nospellcheck)
		: family_(family), series_(series), shape_(shape), size_(size),
		style_(style), color_(color), background_(background), emph_(emph),
		underbar_(underbar), strikeout_(strikeout), xout_(xout), uuline_(uuline),
		uwave_(uwave), noun_(noun), number_(number), nospellcheck_(nospellcheck)
	{}

	/// Decreases font size by one
	FontInfo & decSize();
	/// Increases font size by one
	FontInfo & incSize();

	/// \name Accessor methods
	//@{
	FontFamily family() const { return family_; }
	void setFamily(FontFamily f) { family_ = f; }
	FontSeries series() const { return series_; }
	void setSeries(FontSeries s) { series_ = s; }
	FontShape shape() const { return shape_; }
	void setShape(FontShape s) { shape_ = s; }
	FontSize size() const { return size_; }
	void setSize(FontSize s) { size_ = s; }
	MathStyle style() const {return style_; }
	void setStyle(MathStyle s) { style_ = s; }
	FontState emph() const { return emph_; }
	void setEmph(FontState e) { emph_ = e; }
	FontState underbar() const { return underbar_; }
	void setUnderbar(FontState u) { underbar_ = u; }
	FontState strikeout() const { return strikeout_; }
	void setStrikeout(FontState s) { strikeout_ = s; }
	FontState xout() const { return xout_; }
	void setXout(FontState s) { xout_ = s; }
	FontState uuline() const { return uuline_; }
	void setUuline(FontState s) { uuline_ = s; }
	FontState uwave() const { return uwave_; }
	void setUwave(FontState s) { uwave_ = s; }
	FontState noun() const { return noun_; }
	void setNoun(FontState n) { noun_ = n; }
	FontState number() const { return number_; }
	void setNumber(FontState n) { number_ = n; }
	ColorCode color() const { return color_; }
	void setColor(ColorCode c) { color_ = c; }
	ColorCode background() const { return background_; }
	void setBackground(ColorCode b) { background_ = b; }
	FontState nospellcheck() const { return nospellcheck_; }
	void setNoSpellcheck(FontState n) { nospellcheck_ = n; }
	//@}

	///
	void update(FontInfo const & newfont, bool toggleall);

	/** Reduce font to fall back to template where possible.
	    Equal fields are reduced to INHERIT */
	void reduce(FontInfo const & tmplt);

	/// Realize font from a template (INHERIT are realized)
	FontInfo & realize(FontInfo const & tmplt);
	/// Is a given font fully resolved?
	bool resolved() const;

	/// The real color of the font. This can be the color that is
	/// set for painting, the color of the font or a default color.
	Color realColor() const;
	/// Sets the color which is used during painting
	void setPaintColor(Color c) { paint_color_ = c; }

	/// Compute the font size, taking size and math style into account.
	double realSize() const;

	///
	docstring asCSS() const;

	/// Converts logical attributes to concrete shape attribute
	/// Try hard to inline this as it shows up with 4.6 % in the profiler.
	FontShape realShape() const
	{
		if (noun_ == FONT_ON)
			return SMALLCAPS_SHAPE;
		if (emph_ == FONT_ON)
			return (shape_ == ITALIC_SHAPE || shape_ == SLANTED_SHAPE)
				? UP_SHAPE : ITALIC_SHAPE;
		return shape_;
	}

	bool isSymbolFont() const
	{
		switch (family_) {
		case SYMBOL_FAMILY:
		case CMSY_FAMILY:
		case CMM_FAMILY:
		case CMEX_FAMILY:
		case MSA_FAMILY:
		case MSB_FAMILY:
		case STMARY_FAMILY:
		case WASY_FAMILY:
		case ESINT_FAMILY:
			return true;
		default:
			return false;
		}
	}

	/// Temporarily replace the color with \param color.
	Changer changeColor(ColorCode const color);
	/// Temporarily replace the shape with \param shape.
	Changer changeShape(FontShape const shape);
	/// Temporarily replace the style
	Changer changeStyle(MathStyle style);
	/// Temporarily replace the FontInfo with \param font, and optionally
	/// \param realize the \param font against the current FontInfo.
	Changer change(FontInfo font, bool realize = false);

	/// Build GUI description of font state
	docstring const stateText(bool const terse = false) const;

private:
	friend bool operator==(FontInfo const & lhs, FontInfo const & rhs);

	///
	FontFamily family_;
	///
	FontSeries series_;
	///
	FontShape shape_;
	///
	FontSize size_;
	///
	MathStyle style_;
	///
	ColorCode color_;
	///
	ColorCode background_;
	/// The color used for painting
	Color paint_color_;
	///
	FontState emph_;
	///
	FontState underbar_;
	///
	FontState strikeout_;
	///
	FontState xout_;
	///
	FontState uuline_;
	///
	FontState uwave_;
	///
	FontState noun_;
	///
	FontState number_;
	///
	FontState nospellcheck_;
};


inline bool operator==(FontInfo const & lhs, FontInfo const & rhs)
{
	return lhs.family_ == rhs.family_
		&& lhs.series_ == rhs.series_
		&& lhs.shape_ == rhs.shape_
		&& lhs.size_ == rhs.size_
		&& lhs.style_ == rhs.style_
		&& lhs.color_ == rhs.color_
		&& lhs.background_ == rhs.background_
		&& lhs.emph_ == rhs.emph_
		&& lhs.underbar_ == rhs.underbar_
		&& lhs.strikeout_ == rhs.strikeout_
		&& lhs.xout_ == rhs.xout_
		&& lhs.uuline_ == rhs.uuline_
		&& lhs.uwave_ == rhs.uwave_
		&& lhs.noun_ == rhs.noun_
		&& lhs.number_ == rhs.number_
		&& lhs.nospellcheck_ == rhs.nospellcheck_;
}


inline bool operator!=(FontInfo const & lhs, FontInfo const & rhs)
{
	return !operator==(lhs, rhs);
}

/// Sane font.
extern FontInfo const sane_font;
/// All inherit font.
extern FontInfo const inherit_font;
/// All ignore font.
extern FontInfo const ignore_font;

/// Set family after LyX text format
void setLyXFamily(std::string const &, FontInfo &);

/// Set series after LyX text format
void setLyXSeries(std::string const &, FontInfo &);

/// Set shape after LyX text format
void setLyXShape(std::string const &, FontInfo &);

/// Set size after LyX text format
void setLyXSize(std::string const &, FontInfo &);

/// Sets color after LyX text format
void setLyXColor(std::string const &, FontInfo &);

/// Returns misc flag after LyX text format
FontState setLyXMisc(std::string const &);

/// Read a font specification from Lexer. Used for layout files.
FontInfo lyxRead(support::Lexer &, FontInfo const & fi = sane_font);

/// Write a font specification. Used for layout files.
void lyxWrite(std::ostream &, FontInfo const &, std::string const &, int);

} // namespace lyx

#endif