/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#define QT_FATAL_ASSERT+
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+
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#include "qplatformdefs.h"+
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+
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#include "qfont.h"+
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#include "qapplication.h"+
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#include "qfontinfo.h"+
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#include "qfontdatabase.h"+
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#include "qfontmetrics.h"+
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#include "qpaintdevice.h"+
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#include "qtextcodec.h"+
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#include "qiodevice.h"+
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#include "qhash.h"+
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+
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#include <private/qunicodetables_p.h>+
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#include "qfont_p.h"+
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#include "qfontengine_p.h"+
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#include "qfontengine_x11_p.h"+
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#include "qtextengine_p.h"+
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+
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#include <private/qt_x11_p.h>+
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#include "qx11info_x11.h"+
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+
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#include <time.h>+
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#include <stdlib.h>+
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#include <ctype.h>+
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+
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#define QFONTLOADER_DEBUG+
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#define QFONTLOADER_DEBUG_VERBOSE+
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+
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QT_BEGIN_NAMESPACE+
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+
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double qt_pixelSize(double pointSize, int dpi)+
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{+
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    if (pointSize < 0)+
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        return -1.;+
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    if (dpi == 75) // the stupid 75 dpi setting on X11+
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        dpi = 72;+
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    return (pointSize * dpi) /72.;+
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}+
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+
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double qt_pointSize(double pixelSize, int dpi)+
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{+
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    if (pixelSize < 0)+
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        return -1.;+
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    if (dpi == 75) // the stupid 75 dpi setting on X11+
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        dpi = 72;+
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    return pixelSize * 72. / ((double) dpi);+
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}+
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+
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/*+
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  Removes wildcards from an XLFD.+
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+
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  Returns \a xlfd with all wildcards removed if a match for \a xlfd is+
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  found, otherwise it returns \a xlfd.+
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*/+
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static QByteArray qt_fixXLFD(const QByteArray &xlfd)+
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{+
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    QByteArray ret = xlfd;+
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    int count = 0;+
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    char **fontNames =+
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        XListFonts(QX11Info::display(), xlfd, 32768, &count);+
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    if (count > 0)+
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        ret = fontNames[0];+
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    XFreeFontNames(fontNames);+
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    return ret ;+
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}+
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+
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typedef QHash<int, QString> FallBackHash;+
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Q_GLOBAL_STATIC(FallBackHash, fallBackHash)+
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+
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// Returns the user-configured fallback family for the specified script.+
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QString qt_fallback_font_family(int script)+
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{+
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    FallBackHash *hash = fallBackHash();+
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    return hash->value(script);+
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}+
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+
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// Sets the fallback family for the specified script.+
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Q_GUI_EXPORT void qt_x11_set_fallback_font_family(int script, const QString &family)+
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{+
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    FallBackHash *hash = fallBackHash();+
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    if (!family.isEmpty())+
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        hash->insert(script, family);+
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    else+
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        hash->remove(script);+
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}+
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+
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int QFontPrivate::defaultEncodingID = -1;+
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+
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void QFont::initialize()+
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{+
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    extern int qt_encoding_id_for_mib(int mib); // from qfontdatabase_x11.cpp+
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    QTextCodec *codec = QTextCodec::codecForLocale();+
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    // determine the default encoding id using the locale, otherwise+
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    // fallback to latin1 (mib == 4)+
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    int mib = codec ? codec->mibEnum() : 4;+
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+
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    // for asian locales, use the mib for the font codec instead of the locale codec+
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    switch (mib) {+
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    case 38: // eucKR+
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        mib = 36;+
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        break;+
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+
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    case 2025: // GB2312+
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        mib = 57;+
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        break;+
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+
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    case 113: // GBK+
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        mib = -113;+
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        break;+
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+
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    case 114: // GB18030+
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        mib = -114;+
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        break;+
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+
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    case 2026: // Big5+
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        mib = -2026;+
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        break;+
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+
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    case 2101: // Big5-HKSCS+
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        mib = -2101;+
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        break;+
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+
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    case 16: // JIS7+
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        mib = 15;+
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        break;+
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+
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    case 17: // SJIS+
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    case 18: // eucJP+
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        mib = 63;+
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        break;+
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    }+
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+
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    // get the default encoding id for the locale encoding...+
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    QFontPrivate::defaultEncodingID = qt_encoding_id_for_mib(mib);+
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}+
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+
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void QFont::cleanup()+
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{+
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    QFontCache::cleanup();+
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}+
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+
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/*!+
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  \internal+
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  X11 Only: Returns the screen with which this font is associated.+
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*/+
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int QFont::x11Screen() const+
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{+
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    return d->screen;+
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}+
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+
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/*! \internal+
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    X11 Only: Associate the font with the specified \a screen.+
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*/+
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void QFont::x11SetScreen(int screen)+
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{+
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    if (screen < 0) // assume default+
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        screen = QX11Info::appScreen();+
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+
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    if (screen == d->screen)+
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        return; // nothing to do+
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+
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    detach();+
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    d->screen = screen;+
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}+
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+
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Qt::HANDLE QFont::handle() const+
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{+
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    QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);+
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    Q_ASSERT(engine != 0);+
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    if (engine->type() == QFontEngine::Multi)+
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        engine = static_cast<QFontEngineMulti *>(engine)->engine(0);+
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    if (engine->type() == QFontEngine::XLFD)+
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        return static_cast<QFontEngineXLFD *>(engine)->fontStruct()->fid;+
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    return 0;+
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}+
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+
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+
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FT_Face QFont::freetypeFace() const+
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{+
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#ifndef QT_NO_FREETYPE+
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    QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);+
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    if (engine->type() == QFontEngine::Multi)+
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        engine = static_cast<QFontEngineMulti *>(engine)->engine(0);+
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#ifndef QT_NO_FONTCONFIG+
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    if (engine->type() == QFontEngine::Freetype) {+
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        const QFontEngineFT *ft = static_cast<const QFontEngineFT *>(engine);+
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        return ft->non_locked_face();+
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    } else+
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#endif+
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    if (engine->type() == QFontEngine::XLFD) {+
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        const QFontEngineXLFD *xlfd = static_cast<const QFontEngineXLFD *>(engine);+
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        return xlfd->non_locked_face();+
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    }+
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#endif+
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    return 0;+
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}+
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+
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QString QFont::rawName() const+
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{+
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    QFontEngine *engine = d->engineForScript(QUnicodeTables::Common);+
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    Q_ASSERT(engine != 0);+
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    if (engine->type() == QFontEngine::Multi)+
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        engine = static_cast<QFontEngineMulti *>(engine)->engine(0);+
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    if (engine->type() == QFontEngine::XLFD)+
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        return QString::fromLatin1(engine->name());+
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    return QString();+
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}+
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struct QtFontDesc;+
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+
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void QFont::setRawName(const QString &name)+
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{+
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    detach();+
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+
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    // from qfontdatabase_x11.cpp+
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    extern bool qt_fillFontDef(const QByteArray &xlfd, QFontDef *fd, int dpi, QtFontDesc *desc);+
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+
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    if (!qt_fillFontDef(qt_fixXLFD(name.toLatin1()), &d->request, d->dpi, 0)) {+
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        qWarning("QFont::setRawName: Invalid XLFD: \"%s\"", name.toLatin1().constData());+
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+
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        setFamily(name);+
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        setRawMode(true);+
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    } else {+
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        resolve_mask = QFont::AllPropertiesResolved;+
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    }+
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}+
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+
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QString QFont::lastResortFamily() const+
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{+
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    return QString::fromLatin1("Helvetica");+
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}+
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+
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QString QFont::defaultFamily() const+
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{+
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    switch (d->request.styleHint) {+
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    case QFont::Times:+
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        return QString::fromLatin1("Times");+
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+
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    case QFont::Courier:+
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        return QString::fromLatin1("Courier");+
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+
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    case QFont::Decorative:+
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        return QString::fromLatin1("Old English");+
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+
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    case QFont::Helvetica:+
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    case QFont::System:+
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    default:+
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        return QString::fromLatin1("Helvetica");+
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    }+
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}+
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+
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/*+
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  Returns a last resort raw font name for the font matching algorithm.+
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  This is used if even the last resort family is not available. It+
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  returns \e something, almost no matter what.  The current+
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  implementation tries a wide variety of common fonts, returning the+
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  first one it finds. The implementation may change at any time.+
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*/+
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static const char * const tryFonts[] = {+
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    "-*-helvetica-medium-r-*-*-*-120-*-*-*-*-*-*",+
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    "-*-courier-medium-r-*-*-*-120-*-*-*-*-*-*",+
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    "-*-times-medium-r-*-*-*-120-*-*-*-*-*-*",+
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    "-*-lucida-medium-r-*-*-*-120-*-*-*-*-*-*",+
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    "-*-helvetica-*-*-*-*-*-120-*-*-*-*-*-*",+
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    "-*-courier-*-*-*-*-*-120-*-*-*-*-*-*",+
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    "-*-times-*-*-*-*-*-120-*-*-*-*-*-*",+
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    "-*-lucida-*-*-*-*-*-120-*-*-*-*-*-*",+
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    "-*-helvetica-*-*-*-*-*-*-*-*-*-*-*-*",+
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    "-*-courier-*-*-*-*-*-*-*-*-*-*-*-*",+
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    "-*-times-*-*-*-*-*-*-*-*-*-*-*-*",+
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    "-*-lucida-*-*-*-*-*-*-*-*-*-*-*-*",+
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    "-*-fixed-*-*-*-*-*-*-*-*-*-*-*-*",+
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    "6x13",+
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    "7x13",+
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    "8x13",+
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    "9x15",+
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    "fixed",+
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    0+
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};+
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+
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// Returns true if the font exists, false otherwise+
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static bool fontExists(const QString &fontName)+
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{+
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    int count;+
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    char **fontNames = XListFonts(QX11Info::display(), (char*)fontName.toLatin1().constData(), 32768, &count);+
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    if (fontNames) XFreeFontNames(fontNames);+
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+
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    return count != 0;+
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}+
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+
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QString QFont::lastResortFont() const+
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{+
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    static QString last;+
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+
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    // already found+
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    if (! last.isNull())+
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        return last;+
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+
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    int i = 0;+
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    const char* f;+
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+
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    while ((f = tryFonts[i])) {+
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        last = QString::fromLatin1(f);+
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+
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        if (fontExists(last))+
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            return last;+
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+
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        i++;+
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    }+
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+
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#if defined(CHECK_NULL)+
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    qFatal("QFontPrivate::lastResortFont: Cannot find any reasonable font");+
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#endif+
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    return last;+
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}+
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+
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QT_END_NAMESPACE+
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