kicad/common/font/fontconfig.cpp

223 lines
7.0 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2021 Ola Rinta-Koski
* Copyright (C) 2021-2022 KiCad Developers, see AUTHORS.txt for contributors.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, either version 3 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fontconfig/fontconfig.h>
#include <font/fontconfig.h>
#include <pgm_base.h>
#include <wx/log.h>
#include <trace_helpers.h>
using namespace fontconfig;
static FONTCONFIG* g_config = nullptr;
inline static FcChar8* wxStringToFcChar8( const wxString& str )
{
wxScopedCharBuffer const fcBuffer = str.ToUTF8();
return (FcChar8*) fcBuffer.data();
}
wxString FONTCONFIG::Version()
{
return wxString::Format( "%d.%d.%d", FC_MAJOR, FC_MINOR, FC_REVISION );
}
FONTCONFIG::FONTCONFIG()
{
(void) FcInitLoadConfigAndFonts();
};
FONTCONFIG* Fontconfig()
{
if( !g_config )
{
FcInit();
g_config = new FONTCONFIG();
}
return g_config;
}
bool FONTCONFIG::FindFont( const wxString& aFontName, wxString& aFontFile )
{
FcPattern* pat = FcNameParse( wxStringToFcChar8( aFontName ) );
FcConfigSubstitute( nullptr, pat, FcMatchPattern );
FcDefaultSubstitute( pat );
FcResult r = FcResultNoMatch;
FcPattern* font = FcFontMatch( nullptr, pat, &r );
wxString fontName;
bool ok = false;
bool substituted = false;
if( font )
{
FcChar8* file = nullptr;
if( FcPatternGetString( font, FC_FILE, 0, &file ) == FcResultMatch )
{
aFontFile = wxString::FromUTF8( (char*) file );
FcChar8* family = nullptr;
FcChar8* style = nullptr;
if( FcPatternGetString( font, FC_FAMILY, 0, &family ) == FcResultMatch )
{
fontName = wxString::FromUTF8( (char*) family );
if( FcPatternGetString( font, FC_STYLE, 0, &style ) == FcResultMatch )
{
wxString styleStr = wxString::FromUTF8( (char*) style );
if( !styleStr.IsEmpty() )
{
styleStr.Replace( wxS( " " ), wxS( ":" ) );
fontName += ":" + styleStr;
}
}
// TODO: report Regular vs Book, Italic vs Oblique, etc. or filter them out?
if( aFontName.Contains( ":" ) )
substituted = aFontName.CmpNoCase( fontName ) != 0;
else
substituted = !fontName.StartsWith( aFontName );
}
ok = true;
}
FcPatternDestroy( font );
}
if( !ok )
wxLogWarning( _( "Error loading font '%s'." ), aFontName );
else if( substituted )
wxLogWarning( _( "Font '%s' not found; substituting '%s'." ), aFontName, fontName );
FcPatternDestroy( pat );
return ok;
}
void FONTCONFIG::ListFonts( std::vector<std::string>& aFonts )
{
if( m_fonts.empty() )
{
FcPattern* pat = FcPatternCreate();
FcObjectSet* os = FcObjectSetBuild( FC_FAMILY, FC_STYLE, FC_LANG, FC_FILE, FC_OUTLINE,
nullptr );
FcFontSet* fs = FcFontList( nullptr, pat, os );
for( int i = 0; fs && i < fs->nfont; ++i )
{
FcPattern* font = fs->fonts[i];
FcChar8* file;
FcChar8* style;
FcChar8* family;
FcLangSet* langSet;
FcBool outline;
if( FcPatternGetString( font, FC_FILE, 0, &file ) == FcResultMatch
&& FcPatternGetString( font, FC_FAMILY, 0, &family ) == FcResultMatch
&& FcPatternGetString( font, FC_STYLE, 0, &style ) == FcResultMatch
&& FcPatternGetLangSet( font, FC_LANG, 0, &langSet ) == FcResultMatch
&& FcPatternGetBool( font, FC_OUTLINE, 0, &outline ) == FcResultMatch )
{
if( !outline )
continue;
std::string theFamily( reinterpret_cast<char *>( family ) );
#ifdef __WXMAC__
// On Mac (at least) some of the font names are in their own language. If
// the OS doesn't support this language then we get a bunch of garbage names
// in the font menu.
//
// GTK, on the other hand, doesn't appear to support wxLocale::IsAvailable(),
// so we can't run these checks.
FcStrSet* langStrSet = FcLangSetGetLangs( langSet );
FcStrList* langStrList = FcStrListCreate( langStrSet );
FcChar8* langStr = FcStrListNext( langStrList );
bool langSupported = false;
if( !langStr )
{
// Symbol fonts (Wingdings, etc.) have no language
langSupported = true;
}
else while( langStr )
{
wxString langWxStr( reinterpret_cast<char *>( langStr ) );
const wxLanguageInfo* langInfo = wxLocale::FindLanguageInfo( langWxStr );
if( langInfo && wxLocale::IsAvailable( langInfo->Language ) )
{
langSupported = true;
break;
}
else
{
wxLogTrace( traceFonts, "Font '%s' language '%s' not supported by OS.",
theFamily, langWxStr );
}
langStr = FcStrListNext( langStrList );
}
FcStrListDone( langStrList );
FcStrSetDestroy( langStrSet );
if( !langSupported )
continue;
#endif
std::string theFile( reinterpret_cast<char *>( file ) );
std::string theStyle( reinterpret_cast<char *>( style ) );
FONTINFO fontInfo( theFile, theStyle, theFamily );
if( theFamily.length() > 0 && theFamily.front() == '.' )
continue;
std::map<std::string, FONTINFO>::iterator it = m_fonts.find( theFamily );
if( it == m_fonts.end() )
m_fonts.emplace( theFamily, fontInfo );
else
it->second.Children().push_back( fontInfo );
}
}
if( fs )
FcFontSetDestroy( fs );
}
for( const std::pair<const std::string, FONTINFO>& entry : m_fonts )
aFonts.push_back( entry.second.Family() );
}