Quelle FontInfo.h Sprache: C

// -*- C++ -*-
/* This file is part of
* ======================================================
*
*           LyX, The Document Processor
*
*     Copyright (C) 1997 Asger Alstrup
*           and the LyX Team.
*
*======================================================*/

#ifndef _FONTINFO_H_
#define _FONTINFO_H_

#ifdef __GNUG__
#pragma interface
#endif

#include "LString.h"

/** This class manages a font.
The idea is to create a FontInfo object with a font name pattern with a
wildcard at the size field. Then this object can host request for font-
instances of any given size. If no exact match is found, the closest size
is chosen instead. If the font is scalable, the flag lyxrc->use_scalable_fonts
determines whether to allow scalable fonts to give an exact match. */
class FontInfo {
public:
///
FontInfo() { init(); }

///
FontInfo(LString const & pat)
: pattern(pat) { init(); }

/// Destructor
~FontInfo() { release(); }

/// Does any font match our pattern?
bool exist() {
  query();
  return matches != 0;
}

/// Is this font scalable?
bool isScalable() {
  query();
  return scalable;
}

/// Get existing pattern
LString getPattern() const { return pattern; }

/// Set new pattern
void setPattern(LString const & pat);

/** Return full name of font close to this size.
  If impossible, result is the empty string */
LString getFontname(int size);
private:
/// Font pattern (with wildcard for size)
LString pattern;

/// Available size list
int * sizes;

/// Corresponding name list
LString * strings;

/// Number of matches
int matches;

/// Did we query X about this font?
bool queried;

/// Is this font scalable?
bool scalable;

/// Which index points to scalable font entry?
int scaleindex;

/// Initialize empty record
void init()
{
  sizes = 0;
  strings = 0;
  matches = 0;
  queried = false;
  scalable = false;
  scaleindex = -1;
}

/// Release allocated stuff
void release();

/// Ask X11 about this font pattern
void query();

/// Build newly sized font string
LString resize(LString const &, int size) const;
};
#endif

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