lyx_mirror/src/font.C
Lars Gullik Bjønnes 8283e978f8 ws cleanup
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3803 a592a061-630c-0410-9148-cb99ea01b6c8
2002-03-21 17:27:08 +00:00

238 lines
5.4 KiB
C

/* This file is part of
* ======================================================
*
* LyX, The Document Processor
*
* Copyright 1995 Matthias Ettrich
* Copyright 1995-2001 The LyX Team.
*
* ====================================================== */
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "support/lstrings.h"
#include "font.h"
#include "FontLoader.h"
#include "lyxrc.h"
#include "encoding.h"
#include "language.h"
#include <boost/smart_ptr.hpp>
namespace {
inline
XFontStruct * getXFontstruct(LyXFont const & f)
{
return fontloader.load(f.family(), f.series(),
f.realShape(), f.size());
}
inline
XID getFontID(LyXFont const & f)
{
return getXFontstruct(f)->fid;
}
} // namespace anon
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+256*finfo->max_byte1)
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+256*finfo->max_byte1)
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+256*finfo->max_byte1)
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+256*finfo->max_byte1)
return finfo->per_char[uc - finfo->min_char_or_byte2].rbearing;
else
return width(c, f);
}
int lyxfont::width(char const * s, size_t n, LyXFont const & f)
{
if (!lyxrc.use_gui)
return n;
if (lyxrc.font_norm_type == LyXRC::ISO_10646_1) {
boost::scoped_array<XChar2b> xs(new XChar2b[n]);
Encoding const * encoding = f.language()->encoding();
LyXFont font(f);
if (f.isSymbolFont()) {
#ifdef USE_UNICODE_FOR_SYMBOLS
font.setFamily(LyXFont::ROMAN_FAMILY);
font.setShape(LyXFont::UP_SHAPE);
#endif
encoding = encodings.symbol_encoding();
}
for (size_t i = 0; i < n; ++i) {
Uchar c = encoding->ucs(s[i]);
xs[i].byte1 = c >> 8;
xs[i].byte2 = c & 0xff;
}
int result = width(xs.get(), n, font);
return result;
}
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;
LyXFont smallfont(f);
smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
for (size_t i = 0; i < n; ++i) {
char const c = uppercase(s[i]);
if (c != s[i]) {
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[0] == '-')
return -width(s.substr(1, s.length() - 1), f);
else
return width(s, f);
}
//int lyxfont::width(wstring const & s, int n, LyXFont const & f)
int lyxfont::width(XChar2b const * s, int n, LyXFont const & f)
{
if (!lyxrc.use_gui)
return n;
if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
return ::XTextWidth16(getXFontstruct(f), s, n);
} else {
// emulate smallcaps since X doesn't support this
unsigned int result = 0;
static XChar2b c;
LyXFont smallfont(f);
smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
for (int i = 0; i < n; ++i) {
if (s[i].byte1)
c = s[i];
else {
c.byte1 = s[i].byte1;
c.byte2 = uppercase(s[i].byte2);
}
if (c.byte2 != s[i].byte2) {
result += ::XTextWidth16(getXFontstruct(smallfont), &c, 1);
} else {
result += ::XTextWidth16(getXFontstruct(f), &s[i], 1);
}
}
return result;
}
}
int lyxfont::XTextWidth(LyXFont const & f, char const * str, int count)
{
return ::XTextWidth(getXFontstruct(f), str, count);
}
int lyxfont::XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
{
return ::XTextWidth16(getXFontstruct(f), str, count);
}
void lyxfont::XSetFont(Display * display, GC gc, LyXFont const & f)
{
::XSetFont(display, gc, getFontID(f));
}
void lyxfont::rectText(string const & str, LyXFont const & font,
int & width, int & ascent, int & descent)
{
static int const d = 2;
width = lyxfont::width(str, font) + d * 2 + 2;
ascent = lyxfont::maxAscent(font) + d;
descent = lyxfont::maxDescent(font) + d;
}
void lyxfont::buttonText(string const & str, LyXFont const & font,
int & width, int & ascent, int & descent)
{
static int const d = 3;
width = lyxfont::width(str, font) + d * 2 + 2;
ascent = lyxfont::maxAscent(font) + d;
descent = lyxfont::maxDescent(font) + d;
}
//} // end of namespace font
//} // end of namespace lyx