mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-16 07:55:41 +00:00
a9eb87a89d
Move math style to FontInfo and compute the font sizes for scriptstyle and
scriptscriptstyle according to standard proportions: 0.73 and 0.55.
This is simpler and more accurate. It also fixes the font size of
${\scriptscriptstyle {\textstyle A}}A$ which exposed the limitations of the
previous approach.
451 lines
10 KiB
C++
451 lines
10 KiB
C++
/**
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* \file FontLoader.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Asger Alstrup
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* \author John Levon
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "FontLoader.h"
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#include "FontInfo.h"
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#include "GuiFontMetrics.h"
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#include "qt_helpers.h"
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#include "LyXRC.h"
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#include "support/debug.h"
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#include "support/filetools.h"
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#include "support/gettext.h"
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#include "support/lstrings.h"
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#include "support/Systemcall.h"
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#include "support/Package.h"
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#include "support/os.h"
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#include <QFontInfo>
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#include <QFontDatabase>
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#include "support/lassert.h"
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using namespace std;
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using namespace lyx::support;
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QString const math_fonts[] = {"cmex10", "cmmi10", "cmr10", "cmsy10",
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"esint10", "eufm10", "msam10", "msbm10", "rsfs10", "stmary10",
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"wasy10"};
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int const num_math_fonts = sizeof(math_fonts) / sizeof(*math_fonts);
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namespace lyx {
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extern docstring const stateText(FontInfo const & f);
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namespace frontend {
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/**
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* Matches Fonts against
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* actual QFont instances, and also caches metrics.
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*/
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class GuiFontInfo
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{
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public:
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GuiFontInfo(FontInfo const & f);
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/// The font instance
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QFont font;
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/// Metrics on the font
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GuiFontMetrics metrics;
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};
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namespace {
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struct SymbolFont {
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FontFamily lyx_family;
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QString family;
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QString xlfd;
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};
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SymbolFont symbol_fonts[] = {
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{ SYMBOL_FAMILY,"symbol", "-*-symbol-*-*-*-*-*-*-*-*-*-*-adobe-fontspecific"},
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{ CMR_FAMILY, "cmr10", "-*-cmr10-medium-*-*-*-*-*-*-*-*-*-*-*" },
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{ CMSY_FAMILY, "cmsy10", "-*-cmsy10-*-*-*-*-*-*-*-*-*-*-*-*" },
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{ CMM_FAMILY, "cmmi10", "-*-cmmi10-medium-*-*-*-*-*-*-*-*-*-*-*" },
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{ CMEX_FAMILY, "cmex10", "-*-cmex10-*-*-*-*-*-*-*-*-*-*-*-*" },
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{ MSA_FAMILY, "msam10", "-*-msam10-*-*-*-*-*-*-*-*-*-*-*-*" },
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{ MSB_FAMILY, "msbm10", "-*-msbm10-*-*-*-*-*-*-*-*-*-*-*-*" },
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{ EUFRAK_FAMILY,"eufm10", "-*-eufm10-medium-*-*-*-*-*-*-*-*-*-*-*" },
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{ RSFS_FAMILY, "rsfs10", "-*-rsfs10-medium-*-*-*-*-*-*-*-*-*-*-*" },
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{ STMARY_FAMILY,"stmary10","-*-stmary10-medium-*-*-*-*-*-*-*-*-*-*-*" },
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{ WASY_FAMILY, "wasy10", "-*-wasy10-medium-*-*-*-*-*-*-*-*-*-*-*" },
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{ ESINT_FAMILY, "esint10","-*-esint10-medium-*-*-*-*-*-*-*-*-*-*-*" }
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};
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size_t const nr_symbol_fonts = sizeof(symbol_fonts) / sizeof(symbol_fonts[0]);
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/// BUTT ugly !
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static GuiFontInfo *
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fontinfo_[NUM_FAMILIES][NUM_SERIES][NUM_SHAPE][NUM_SIZE][NUM_STYLE];
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// returns a reference to the pointer type (GuiFontInfo *) in the
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// fontinfo_ table.
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GuiFontInfo * & fontinfo_ptr(FontInfo const & f)
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{
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// The display font and the text font are the same
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size_t const style = (f.style() == LM_ST_DISPLAY) ? LM_ST_TEXT : f.style();
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return fontinfo_[f.family()][f.series()][f.realShape()][f.size()][style];
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}
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// Get font info (font + metrics) for the given LyX font.
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// if not cached, create it.
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GuiFontInfo & fontinfo(FontInfo const & f)
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{
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bool const fontIsRealized =
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(f.family() < NUM_FAMILIES) &&
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(f.series() < NUM_SERIES) &&
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(f.realShape() < NUM_SHAPE) &&
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(f.size() < NUM_SIZE);
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if (!fontIsRealized) {
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// We can reset the font to something sensible in release mode.
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LATTEST(false);
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LYXERR0("Unrealized font!");
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FontInfo f2 = f;
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f2.realize(sane_font);
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GuiFontInfo * & fi = fontinfo_ptr(f2);
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if (!fi)
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fi = new GuiFontInfo(f2);
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return *fi;
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}
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GuiFontInfo * & fi = fontinfo_ptr(f);
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if (!fi)
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fi = new GuiFontInfo(f);
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return *fi;
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}
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QString rawName(QString const & family)
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{
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for (size_t i = 0; i < nr_symbol_fonts; ++i)
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if (family == symbol_fonts[i].family)
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return symbol_fonts[i].xlfd;
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LYXERR(Debug::FONT, "BUG: family not found !");
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return QString();
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}
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QString symbolFamily(FontFamily family)
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{
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for (size_t i = 0; i < nr_symbol_fonts; ++i) {
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if (family == symbol_fonts[i].lyx_family)
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return symbol_fonts[i].family;
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}
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return QString();
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}
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#if 0
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bool isSymbolFamily(FontFamily family)
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{
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return family >= SYMBOL_FAMILY && family <= ESINT_FAMILY;
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}
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#endif
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static bool isChosenFont(QFont & font, QString const & family,
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QString const & style)
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{
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// QFontInfo won't find a font that has only a few glyphs at unusual
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// positions, e.g. the original esint10 font.
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// The workaround is to add dummy glyphs at least at all ASCII
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// positions.
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QFontInfo fi(font);
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LYXERR(Debug::FONT, "got: " << fi.family());
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if (fi.family().contains(family)
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#if QT_VERSION >= 0x040800
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&& (style.isEmpty() || fi.styleName().contains(style))
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#endif
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) {
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LYXERR(Debug::FONT, " got it ");
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return true;
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}
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return false;
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}
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QFont symbolFont(QString const & family, bool * ok)
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{
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LYXERR(Debug::FONT, "Looking for font family " << family << " ... ");
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QString upper = family;
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upper[0] = family[0].toUpper();
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QFont font;
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font.setFamily(family);
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#if QT_VERSION >= 0x040800
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font.setStyleName("LyX");
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if (isChosenFont(font, family, "LyX")) {
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LYXERR(Debug::FONT, "lyx!");
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*ok = true;
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return font;
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}
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LYXERR(Debug::FONT, "Trying normal " << family << " ... ");
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font.setStyleName(QString());
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#endif
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if (isChosenFont(font, family, QString())) {
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LYXERR(Debug::FONT, "normal!");
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*ok = true;
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return font;
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}
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LYXERR(Debug::FONT, "Trying " << upper << " ... ");
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font.setFamily(upper);
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if (isChosenFont(font, upper, QString())) {
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LYXERR(Debug::FONT, "upper!");
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*ok = true;
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return font;
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}
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// A simple setFamily() fails on Qt 2
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QString const raw = rawName(family);
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LYXERR(Debug::FONT, "Trying " << raw << " ... ");
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font.setRawName(raw);
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if (isChosenFont(font, family, QString())) {
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LYXERR(Debug::FONT, "raw version!");
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*ok = true;
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return font;
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}
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LYXERR(Debug::FONT, " FAILED :-(");
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*ok = false;
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return font;
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}
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} // namespace anon
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FontLoader::FontLoader()
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{
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QString const fonts_dir =
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toqstr(addPath(package().system_support().absFileName(), "fonts"));
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for (int i = 0 ; i < num_math_fonts; ++i) {
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QString const font_file = fonts_dir + math_fonts[i] + ".ttf";
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int fontID = QFontDatabase::addApplicationFont(font_file);
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LYXERR(Debug::FONT, "Adding font " << font_file
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<< (fontID < 0 ? " FAIL" : " OK"));
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}
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for (int i1 = 0; i1 < NUM_FAMILIES; ++i1)
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for (int i2 = 0; i2 < NUM_SERIES; ++i2)
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for (int i3 = 0; i3 < NUM_SHAPE; ++i3)
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for (int i4 = 0; i4 < NUM_SIZE; ++i4)
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for (int i5 = 0; i5 < NUM_STYLE; ++i5)
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fontinfo_[i1][i2][i3][i4][i5] = 0;
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}
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void FontLoader::update()
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{
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for (int i1 = 0; i1 < NUM_FAMILIES; ++i1)
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for (int i2 = 0; i2 < NUM_SERIES; ++i2)
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for (int i3 = 0; i3 < NUM_SHAPE; ++i3)
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for (int i4 = 0; i4 < NUM_SIZE; ++i4)
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for (int i5 = 0; i5 < NUM_STYLE; ++i5) {
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delete fontinfo_[i1][i2][i3][i4][i5];
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fontinfo_[i1][i2][i3][i4][i5] = 0;
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}
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}
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FontLoader::~FontLoader()
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{
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update();
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}
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/////////////////////////////////////////////////
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namespace {
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QString makeFontName(QString const & family, QString const & foundry)
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{
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QString res = family;
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if (!foundry.isEmpty())
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res += " [" + foundry + ']';
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return res;
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}
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QFont makeQFont(FontInfo const & f)
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{
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QFont font;
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QString const pat = symbolFamily(f.family());
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if (!pat.isEmpty()) {
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bool ok;
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font = symbolFont(pat, &ok);
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} else {
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switch (f.family()) {
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case ROMAN_FAMILY: {
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QString family = makeFontName(toqstr(lyxrc.roman_font_name),
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toqstr(lyxrc.roman_font_foundry));
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font.setFamily(family);
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#ifdef Q_OS_MAC
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#if QT_VERSION >= 0x040300 //&& QT_VERSION < 0x040800
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// Workaround for a Qt bug, see http://www.lyx.org/trac/ticket/3684
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// and http://bugreports.qt.nokia.com/browse/QTBUG-11145.
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// FIXME: Check whether this is really fixed in Qt 4.8
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if (family == "Times" && !font.exactMatch())
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font.setFamily("Times New Roman");
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#endif
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#endif
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break;
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}
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case SANS_FAMILY:
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font.setFamily(makeFontName(toqstr(lyxrc.sans_font_name),
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toqstr(lyxrc.sans_font_foundry)));
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break;
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case TYPEWRITER_FAMILY:
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font.setFamily(makeFontName(toqstr(lyxrc.typewriter_font_name),
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toqstr(lyxrc.typewriter_font_foundry)));
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break;
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default:
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break;
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}
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}
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switch (f.series()) {
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case MEDIUM_SERIES:
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font.setWeight(QFont::Normal);
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break;
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case BOLD_SERIES:
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font.setWeight(QFont::Bold);
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break;
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default:
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break;
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}
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switch (f.realShape()) {
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case ITALIC_SHAPE:
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font.setStyle(QFont::StyleItalic);
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break;
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case SLANTED_SHAPE:
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font.setStyle(QFont::StyleOblique);
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break;
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case SMALLCAPS_SHAPE:
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font.setCapitalization(QFont::SmallCaps);
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break;
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default:
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break;
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}
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LYXERR(Debug::FONT, "Font '" << stateText(f)
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<< "' matched by\n" << font.family());
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// Is this an exact match?
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if (font.exactMatch())
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LYXERR(Debug::FONT, "This font is an exact match");
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else
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LYXERR(Debug::FONT, "This font is NOT an exact match");
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LYXERR(Debug::FONT, "XFLD: " << font.rawName());
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font.setPointSizeF(f.realSize() * lyxrc.zoom / 100.0);
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LYXERR(Debug::FONT, "The font has size: " << font.pointSizeF());
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return font;
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}
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} // anon namespace
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GuiFontInfo::GuiFontInfo(FontInfo const & f)
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: font(makeQFont(f)), metrics(font)
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{}
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bool FontLoader::available(FontInfo const & f)
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{
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// FIXME THREAD
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static vector<int> cache_set(NUM_FAMILIES, false);
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static vector<int> cache(NUM_FAMILIES, false);
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FontFamily family = f.family();
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#ifdef Q_OS_MAC
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// Apple ships a font name "Symbol", which has more or less the same
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// glyphs as the original PostScript Symbol font, but it uses a different
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// encoding (see https://en.wikipedia.org/wiki/Symbol_(typeface)#cite_note-2).
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// Since we expect the font specific encoding of the original
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// PostScript Symbol font, we can't use the one provided on OS X.
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// See also the discussion in bug 7954.
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if (f.family() == SYMBOL_FAMILY)
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return false;
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#endif
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if (cache_set[family])
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return cache[family];
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cache_set[family] = true;
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QString const pat = symbolFamily(family);
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if (pat.isEmpty())
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// We don't care about non-symbol fonts
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return false;
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bool ok;
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symbolFont(pat, &ok);
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if (!ok)
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return false;
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cache[family] = true;
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return true;
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}
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bool FontLoader::canBeDisplayed(char_type c)
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{
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// bug 8493
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if (c == 0x0009)
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// FIXME check whether this is still needed for Qt5
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return false;
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#if QT_VERSION < 0x050000 && defined(QT_MAC_USE_COCOA) && (QT_MAC_USE_COCOA > 0)
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// bug 7954, see also comment in GuiPainter::text()
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if (c == 0x00ad)
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return false;
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#endif
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return true;
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}
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FontMetrics const & FontLoader::metrics(FontInfo const & f)
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{
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return fontinfo(f).metrics;
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}
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GuiFontMetrics const & getFontMetrics(FontInfo const & f)
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{
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return fontinfo(f).metrics;
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}
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QFont const & getFont(FontInfo const & f)
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{
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return fontinfo(f).font;
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}
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} // namespace frontend
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} // namespace lyx
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