lyx_mirror/src/font.C
Jean-Marc Lasgouttes 1a0b18b01c Small changes needed by dec cxx
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@639 a592a061-630c-0410-9148-cb99ea01b6c8
2000-04-06 09:17:40 +00:00

160 lines
3.5 KiB
C

#include <config.h>
#include <cctype>
#include "font.h"
#include "FontLoader.h"
#include "lyxrc.h"
extern LyXRC lyxrc;
// namespace {
static inline
XFontStruct * getXFontstruct(LyXFont const & f)
{
return fontloader.load(f.family(), f.series(),
f.realShape(), f.size());
}
static inline
XID getFontID(LyXFont const & f)
{
return getXFontstruct(f)->fid;
}
// } // end of anon namespace
int lyxfont::maxAscent(LyXFont const & f)
{
return getXFontstruct(f)->ascent;
}
int lyxfont::maxDescent(LyXFont const & f)
{
return getXFontstruct(f)->descent;
}
int lyxfont::ascent(char c, LyXFont const & f)
{
XFontStruct * finfo = getXFontstruct(f);
unsigned int uc = static_cast<unsigned char>(c);
if (finfo->per_char
&& uc >= finfo->min_char_or_byte2
&& uc <= finfo->max_char_or_byte2)
return finfo->per_char[uc - finfo->min_char_or_byte2].ascent;
else
return finfo->ascent;
}
int lyxfont::descent(char c, LyXFont const & f)
{
XFontStruct * finfo = getXFontstruct(f);
unsigned int uc = static_cast<unsigned char>(c);
if (finfo->per_char
&& uc >= finfo->min_char_or_byte2
&& uc <= finfo->max_char_or_byte2)
return finfo->per_char[uc - finfo->min_char_or_byte2].descent;
else
return finfo->descent;
}
int lyxfont::lbearing(char c, LyXFont const & f)
{
XFontStruct * finfo = getXFontstruct(f);
unsigned int uc = static_cast<unsigned char>(c);
if (finfo->per_char
&& uc >= finfo->min_char_or_byte2
&& uc <= finfo->max_char_or_byte2)
return finfo->per_char[uc - finfo->min_char_or_byte2].lbearing;
else
return 0;
}
int lyxfont::rbearing(char c, LyXFont const & f)
{
XFontStruct * finfo = getXFontstruct(f);
unsigned int uc = static_cast<unsigned char>(c);
if (finfo->per_char
&& uc >= finfo->min_char_or_byte2
&& uc <= finfo->max_char_or_byte2)
return finfo->per_char[uc - finfo->min_char_or_byte2].rbearing;
else
return width(c, f);
}
int lyxfont::width(char c, LyXFont const & f)
{
if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
return lyxrc.use_gui ? ::XTextWidth(getXFontstruct(f), &c, 1)
: 1;
} else {
LyXFont smallfont(f);
smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
if (islower(static_cast<unsigned char>(c))) {
c = toupper(c);
return ::XTextWidth(getXFontstruct(smallfont), &c, 1);
} else {
return ::XTextWidth(getXFontstruct(f), &c, 1);
}
}
}
int lyxfont::width(char const * s, int n, LyXFont const & f)
{
if (!lyxrc.use_gui)
return n;
if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
return ::XTextWidth(getXFontstruct(f), s, n);
} else {
// emulate smallcaps since X doesn't support this
unsigned int result = 0;
char c;
LyXFont smallfont(f);
smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
for (int i = 0; i < n; ++i) {
c = s[i];
// when islower is a macro, the cast is needed (JMarc)
if (islower(static_cast<unsigned char>(c))) {
c = toupper(c);
result += ::XTextWidth(getXFontstruct(smallfont), &c, 1);
} else {
result += ::XTextWidth(getXFontstruct(f), &c, 1);
}
}
return result;
}
}
int lyxfont::signedWidth(string const & s, LyXFont const & f)
{
if (s.empty()) return 0;
if (s.c_str()[0] == '-')
return -width(s.c_str() + 1, s.length() - 1, f);
else
return width(s.c_str(), s.length(), f);
}
int lyxfont::XTextWidth(LyXFont const & f, char * str, int count)
{
return ::XTextWidth(getXFontstruct(f), str, count);
}
void lyxfont::XSetFont(Display * display, GC gc, LyXFont const & f)
{
::XSetFont(display, gc, getFontID(f));
}
//} // end of namespace font
//} // end of namespace lyx