+/* 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 "xfont_metrics.h"
+#include "FontLoader.h"
+#include "lyxrc.h"
+#include "encoding.h"
+#include "language.h"
+
+#include <boost/scoped_array.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 font_metrics::maxAscent(LyXFont const & f)
+{
+ return getXFontstruct(f)->ascent;
+}
+
+
+int font_metrics::maxDescent(LyXFont const & f)
+{
+ return getXFontstruct(f)->descent;
+}
+
+
+int font_metrics::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 font_metrics::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 font_metrics::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 font_metrics::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 font_metrics::width(char c, LyXFont const & f)
+{
+ return width(&c, 1, f);
+}
+
+
+int font_metrics::width(string const & s, LyXFont const & f)
+{
+ if (s.empty()) return 0;
+ return width(s.data(), s.length(), f);
+}
+
+
+int font_metrics::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 font_metrics::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 font_metrics::width(wstring const & s, int n, LyXFont const & f)
+int font_metrics::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 font_metrics::XTextWidth(LyXFont const & f, char const * str, int count)
+{
+ return ::XTextWidth(getXFontstruct(f), str, count);
+}
+
+
+int font_metrics::XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
+{
+ return ::XTextWidth16(getXFontstruct(f), str, count);
+}
+
+
+void font_metrics::XSetFont(Display * display, GC gc, LyXFont const & f)
+{
+ ::XSetFont(display, gc, getFontID(f));
+}
+
+
+void font_metrics::rectText(string const & str, LyXFont const & font,
+ int & width, int & ascent, int & descent)
+{
+ static int const d = 2;
+ width = font_metrics::width(str, font) + d * 2 + 2;
+ ascent = font_metrics::maxAscent(font) + d;
+ descent = font_metrics::maxDescent(font) + d;
+}
+
+
+
+void font_metrics::buttonText(string const & str, LyXFont const & font,
+ int & width, int & ascent, int & descent)
+{
+ static int const d = 3;
+
+ width = font_metrics::width(str, font) + d * 2 + 2;
+ ascent = font_metrics::maxAscent(font) + d;
+ descent = font_metrics::maxDescent(font) + d;
+}
+
+
+//} // end of namespace font
+//} // end of namespace lyx