/usr/include/root/TGFont.h is in libroot-gui-dev 5.34.14-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Author: Fons Rademakers 20/5/2003
/*************************************************************************
* Copyright (C) 1995-2003, Rene Brun and Fons Rademakers. *
* All rights reserved. *
* *
* For the licensing terms see $ROOTSYS/LICENSE. *
* For the list of contributors see $ROOTSYS/README/CREDITS. *
*************************************************************************/
#ifndef ROOT_TGFont
#define ROOT_TGFont
//////////////////////////////////////////////////////////////////////////
// //
// TGFont and TGFontPool //
// //
// Encapsulate fonts used in the GUI system. //
// TGFontPool provides a pool of fonts. //
// //
//////////////////////////////////////////////////////////////////////////
#ifndef ROOT_TNamed
#include "TNamed.h"
#endif
#ifndef ROOT_TGObject
#include "TGObject.h"
#endif
#ifndef ROOT_TRefCnt
#include "TRefCnt.h"
#endif
class THashTable;
class TObjString;
class TGFont;
// Flags passed to TGFont::MeasureChars and TGFont::ComputeTextLayout
enum ETextLayoutFlags {
kTextWholeWords = BIT(0),
kTextAtLeastOne = BIT(1),
kTextPartialOK = BIT(2),
kTextIgnoreTabs = BIT(3),
kTextIgnoreNewlines = BIT(4)
};
enum EFontWeight {
kFontWeightNormal = 0,
kFontWeightMedium = 0,
kFontWeightBold = 1,
kFontWeightLight = 2,
kFontWeightDemibold = 3,
kFontWeightBlack = 4,
kFontWeightUnknown = -1
};
enum EFontSlant {
kFontSlantRoman = 0,
kFontSlantItalic = 1,
kFontSlantOblique = 2,
kFontSlantUnknown = -1
};
struct FontMetrics_t {
Int_t fAscent; // from baseline to top of font
Int_t fDescent; // from baseline to bottom of font
Int_t fLinespace; // the sum of the ascent and descent
Int_t fMaxWidth; // width of widest character in font
Bool_t fFixed; // true if monospace, false otherwise
};
struct FontAttributes_t {
const char *fFamily; // Font family. The most important field.
Int_t fPointsize; // Pointsize of font, 0 for default size, or negative number meaning pixel size.
Int_t fWeight; // Weight flag; see below for def'n.
Int_t fSlant; // Slant flag; see below for def'n.
Int_t fUnderline; // Non-zero for underline font.
Int_t fOverstrike; // Non-zero for overstrike font.
FontAttributes_t(): // default constructor
fFamily (0),
fPointsize (0),
fWeight (kFontWeightNormal),
fSlant (kFontSlantRoman),
fUnderline (0),
fOverstrike(0) { }
FontAttributes_t(const FontAttributes_t& f): // copy constructor
fFamily (f.fFamily),
fPointsize (f.fPointsize),
fWeight (f.fWeight),
fSlant (f.fSlant),
fUnderline (f.fUnderline),
fOverstrike(f.fOverstrike) { }
FontAttributes_t& operator=(const FontAttributes_t& f) // assignment operator
{
if (this != &f) {
fFamily = f.fFamily;
fPointsize = f.fPointsize;
fWeight = f.fWeight;
fSlant = f.fSlant;
fUnderline = f.fUnderline;
fOverstrike = f.fOverstrike;
}
return *this;
}
};
struct LayoutChunk_t;
class TGTextLayout : public TObject {
friend class TGFont;
protected:
const TGFont *fFont; // The font used when laying out the text.
const char *fString; // The string that was layed out.
Int_t fWidth; // The maximum width of all lines in the text layout.
Int_t fNumChunks; // Number of chunks actually used in following array.
LayoutChunk_t *fChunks; // Array of chunks. The actual size will be maxChunks.
TGTextLayout(const TGTextLayout &tlayout); // not implemented
void operator=(const TGTextLayout &tlayout); // not implemented
public:
TGTextLayout(): fFont(NULL), fString(""), fWidth(0), fNumChunks(0), fChunks(NULL) {}
virtual ~TGTextLayout();
void DrawText(Drawable_t dst, GContext_t gc, Int_t x, Int_t y,
Int_t firstChar, Int_t lastChar) const;
void UnderlineChar(Drawable_t dst, GContext_t gc,
Int_t x, Int_t y, Int_t underline) const;
Int_t PointToChar(Int_t x, Int_t y) const;
Int_t CharBbox(Int_t index, Int_t *x, Int_t *y, Int_t *w, Int_t *h) const;
Int_t DistanceToText(Int_t x, Int_t y) const;
Int_t IntersectText(Int_t x, Int_t y, Int_t w, Int_t h) const;
void ToPostscript(TString *dst) const;
ClassDef(TGTextLayout,0) // Keep track of string measurement information.
};
// The following class is used to keep track of the generic information about a font.
class TGFont : public TNamed, public TRefCnt {
friend class TGFontPool;
friend class TGTextLayout;
private:
FontStruct_t fFontStruct; // Low level graphics fontstruct
FontH_t fFontH; // Font handle (derived from fontstruct)
FontMetrics_t fFM; // Cached font metrics
FontAttributes_t fFA; // Actual font attributes obtained when the font was created
TObjString *fNamedHash; // Pointer to the named object TGFont was based on
Int_t fTabWidth; // Width of tabs in this font (pixels).
Int_t fUnderlinePos; // Offset from baseline to origin of underline bar
// (used for drawing underlines on a non-underlined font).
Int_t fUnderlineHeight; // Height of underline bar (used for drawing
// underlines on a non-underlined font).
char fTypes[256]; // Array giving types of all characters in
// the font, used when displaying control characters.
Int_t fWidths[256]; // Array giving widths of all possible characters in the font.
Int_t fBarHeight; // Height of underline or overstrike bar
// (used for simulating a native underlined or strikeout font).
protected:
TGFont(const char *name)
: TNamed(name,""), TRefCnt(), fFontStruct(0), fFontH(0), fFM(),
fFA(), fNamedHash(0), fTabWidth(0), fUnderlinePos(0), fUnderlineHeight(0), fBarHeight(0)
{
SetRefCount(1);
for (Int_t i=0; i<256; i++) {
fWidths[i] = 0;
fTypes[i] = ' ';
}
}
TGFont(const TGFont &font); // not implemented
void operator=(const TGFont &font); // not implemented
LayoutChunk_t *NewChunk(TGTextLayout *layout, int *maxPtr,
const char *start, int numChars,
int curX, int newX, int y) const;
public:
virtual ~TGFont();
FontH_t GetFontHandle() const { return fFontH; }
FontStruct_t GetFontStruct() const { return fFontStruct; }
FontStruct_t operator()() const;
void GetFontMetrics(FontMetrics_t *m) const;
FontAttributes_t GetFontAttributes() const { return fFA; }
Int_t PostscriptFontName(TString *dst) const;
Int_t TextWidth(const char *string, Int_t numChars = -1) const;
Int_t XTextWidth(const char *string, Int_t numChars = -1) const;
Int_t TextHeight() const { return fFM.fLinespace; }
void UnderlineChars(Drawable_t dst, GContext_t gc,
const char *string, Int_t x, Int_t y,
Int_t firstChar, Int_t lastChar) const;
TGTextLayout *ComputeTextLayout(const char *string, Int_t numChars,
Int_t wrapLength, Int_t justify, Int_t flags,
UInt_t *width, UInt_t *height) const;
Int_t MeasureChars(const char *source, Int_t numChars, Int_t maxLength,
Int_t flags, Int_t *length) const;
void DrawCharsExp(Drawable_t dst, GContext_t gc, const char *source,
Int_t numChars, Int_t x, Int_t y) const;
void DrawChars(Drawable_t dst, GContext_t gc, const char *source,
Int_t numChars, Int_t x, Int_t y) const;
void Print(Option_t *option="") const;
virtual void SavePrimitive(ostream &out, Option_t * = "");
ClassDef(TGFont,0) // GUI font description
};
struct FontStateMap_t;
struct XLFDAttributes_t;
class TGFontPool : public TGObject {
private:
THashTable *fList; // TGFont objects pool
THashTable *fUidTable; // Hash table for some used string values like family names, etc.
THashTable *fNamedTable; // Map a name to a set of attributes for a font
TGFontPool(const TGFontPool& fp); // not implemented
TGFontPool& operator=(const TGFontPool& fp); // not implemented
protected:
const char *GetUid(const char *string);
Bool_t ParseXLFD(const char *string, XLFDAttributes_t *xa);
TGFont *GetFontFromAttributes(FontAttributes_t *fa, TGFont *fontPtr);
int FindStateNum(const FontStateMap_t *map, const char *strKey);
const char *FindStateString(const FontStateMap_t *map, int numKey);
Bool_t FieldSpecified(const char *field);
TGFont *GetNativeFont(const char *name, Bool_t fixedDefault = kTRUE);
TGFont *MakeFont(TGFont *font, FontStruct_t fontStruct, const char *fontName);
public:
TGFontPool(TGClient *client);
virtual ~TGFontPool();
TGFont *GetFont(const char *font, Bool_t fixedDefault = kTRUE);
TGFont *GetFont(const TGFont *font);
TGFont *GetFont(FontStruct_t font);
TGFont *GetFont(const char *family, Int_t ptsize, Int_t weight, Int_t slant);
void FreeFont(const TGFont *font);
TGFont *FindFont(FontStruct_t font) const;
TGFont *FindFontByHandle(FontH_t font) const;
char **GetAttributeInfo(const FontAttributes_t *fa);
void FreeAttributeInfo(char **info);
char **GetFontFamilies();
void FreeFontFamilies(char **f);
Bool_t ParseFontName(const char *string, FontAttributes_t *fa);
const char *NameOfFont(TGFont *font);
void Print(Option_t *option="") const;
ClassDef(TGFontPool,0) // Font pool
};
#endif
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