kfontaction.cpp

/*
    This file is part of the KDE libraries
    SPDX-FileCopyrightText: 1999 Reginald Stadlbauer <reggie@kde.org>
    SPDX-FileCopyrightText: 1999 Simon Hausmann <hausmann@kde.org>
    SPDX-FileCopyrightText: 2000 Nicolas Hadacek <haadcek@kde.org>
    SPDX-FileCopyrightText: 2000 Kurt Granroth <granroth@kde.org>
    SPDX-FileCopyrightText: 2000 Michael Koch <koch@kde.org>
    SPDX-FileCopyrightText: 2001 Holger Freyther <freyther@kde.org>
    SPDX-FileCopyrightText: 2002 Ellis Whitehead <ellis@kde.org>
    SPDX-FileCopyrightText: 2002 Joseph Wenninger <jowenn@kde.org>
    SPDX-FileCopyrightText: 2003 Andras Mantia <amantia@kde.org>
    SPDX-FileCopyrightText: 2005-2006 Hamish Rodda <rodda@kde.org>
    SPDX-FileCopyrightText: 2007 Clarence Dang <dang@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-only
*/
 
#include "kfontaction.h"
 
#include "kselectaction_p.h"
 
#include <QFontComboBox>
 
#include <kfontchooser.h>
 
class KFontActionPrivate : public KSelectActionPrivate
{
    Q_DECLARE_PUBLIC(KFontAction)
 
public:
    KFontActionPrivate(KFontAction *qq)
        : KSelectActionPrivate(qq)
    {
    }
 
    void slotFontChanged(const QFont &font)
    {
        Q_Q(KFontAction);
 
        //        qCDebug(KWidgetsAddonsLog) << "QFontComboBox - slotFontChanged("
        //                 << font.family() << ") settingFont=" << settingFont;
        if (settingFont) {
            return;
        }
 
        const QString fontFamily = font.family();
        q->setFont(fontFamily);
        Q_EMIT q->textTriggered(fontFamily);
 
        //        qCDebug(KWidgetsAddonsLog) << "\tslotFontChanged done";
    }
 
    int settingFont = 0;
    QFontComboBox::FontFilters fontFilters = QFontComboBox::AllFonts;
};
 
QStringList fontList(const QFontComboBox::FontFilters &fontFilters = QFontComboBox::AllFonts)
{
    QStringList families;
    if (fontFilters == QFontComboBox::AllFonts) {
        families = QFontDatabase::families();
    } else {
        const QFontComboBox::FontFilters scalableMask = (QFontComboBox::ScalableFonts | QFontComboBox::NonScalableFonts);
        const QFontComboBox::FontFilters spacingMask = (QFontComboBox::ProportionalFonts | QFontComboBox::MonospacedFonts);
 
        const auto allFamilies = QFontDatabase::families();
        for (const QString &family : allFamilies) {
            if ((fontFilters & scalableMask) && (fontFilters & scalableMask) != scalableMask) {
                if (bool(fontFilters & QFontComboBox::ScalableFonts) != QFontDatabase::isSmoothlyScalable(family)) {
                    continue;
                }
            }
            if ((fontFilters & spacingMask) && (fontFilters & spacingMask) != spacingMask) {
                if (bool(fontFilters & QFontComboBox::MonospacedFonts) != QFontDatabase::isFixedPitch(family)) {
                    continue;
                }
            }
 
            families << family;
        }
    }
 
    families.sort();
    return families;
}
 
KFontAction::KFontAction(uint fontListCriteria, QObject *parent)
    : KSelectAction(*new KFontActionPrivate(this), parent)
{
    Q_D(KFontAction);
 
    if (fontListCriteria & KFontChooser::FixedWidthFonts) {
        d->fontFilters |= QFontComboBox::MonospacedFonts;
    }
 
    if (fontListCriteria & KFontChooser::SmoothScalableFonts) {
        d->fontFilters |= QFontComboBox::ScalableFonts;
    }
 
    KSelectAction::setItems(fontList(d->fontFilters));
    setEditable(true);
}
 
KFontAction::KFontAction(QObject *parent)
    : KSelectAction(*new KFontActionPrivate(this), parent)
{
    KSelectAction::setItems(fontList());
    setEditable(true);
}
 
KFontAction::KFontAction(const QString &text, QObject *parent)
    : KSelectAction(*new KFontActionPrivate(this), parent)
{
    setText(text);
    KSelectAction::setItems(fontList());
    setEditable(true);
}
 
KFontAction::KFontAction(const QIcon &icon, const QString &text, QObject *parent)
    : KSelectAction(*new KFontActionPrivate(this), parent)
{
    setIcon(icon);
    setText(text);
    KSelectAction::setItems(fontList());
    setEditable(true);
}
 
KFontAction::~KFontAction() = default;
 
QString KFontAction::font() const
{
    return currentText();
}
 
QWidget *KFontAction::createWidget(QWidget *parent)
{
    Q_D(KFontAction);
 
    //    qCDebug(KWidgetsAddonsLog) << "KFontAction::createWidget()";
 
    // This is the visual element on the screen.  This method overrides
    // the KSelectAction one, preventing KSelectAction from creating its
    // regular KComboBox.
    QFontComboBox *cb = new QFontComboBox(parent);
    cb->setFontFilters(d->fontFilters);
 
    //    qCDebug(KWidgetsAddonsLog) << "\tset=" << font();
    // Do this before connecting the signal so that nothing will fire.
    cb->setCurrentFont(QFont(font().toLower()));
    //    qCDebug(KWidgetsAddonsLog) << "\tspit back=" << cb->currentFont().family();
 
    connect(cb, &QFontComboBox::currentFontChanged, this, [this](const QFont &ft) {
        Q_D(KFontAction);
        d->slotFontChanged(ft);
    });
    cb->setMinimumWidth(cb->sizeHint().width());
    return cb;
}
 
/*
 * Maintenance note: Keep in sync with QFontComboBox::setCurrentFont()
 */
void KFontAction::setFont(const QString &family)
{
    Q_D(KFontAction);
 
    //    qCDebug(KWidgetsAddonsLog) << "KFontAction::setFont(" << family << ")";
 
    // Suppress triggered(QString) signal and prevent recursive call to ourself.
    d->settingFont++;
 
    const auto createdWidgets = this->createdWidgets();
    for (QWidget *w : createdWidgets) {
        QFontComboBox *cb = qobject_cast<QFontComboBox *>(w);
        //        qCDebug(KWidgetsAddonsLog) << "\tw=" << w << "cb=" << cb;
 
        if (!cb) {
            continue;
        }
 
        cb->setCurrentFont(QFont(family.toLower()));
        //        qCDebug(KWidgetsAddonsLog) << "\t\tw spit back=" << cb->currentFont().family();
    }
 
    d->settingFont--;
 
    //    qCDebug(KWidgetsAddonsLog) << "\tcalling setCurrentAction()";
 
    QString lowerName = family.toLower();
    if (setCurrentAction(lowerName, Qt::CaseInsensitive)) {
        return;
    }
 
    int i = lowerName.indexOf(QLatin1String(" ["));
    if (i > -1) {
        lowerName.truncate(i);
        i = 0;
        if (setCurrentAction(lowerName, Qt::CaseInsensitive)) {
            return;
        }
    }
 
    lowerName += QLatin1String(" [");
    if (setCurrentAction(lowerName, Qt::CaseInsensitive)) {
        return;
    }
 
    // TODO: Inconsistent state if QFontComboBox::setCurrentFont() succeeded
    //       but setCurrentAction() did not and vice-versa.
    //    qCDebug(KWidgetsAddonsLog) << "Font not found " << family.toLower();
}
 
#include "moc_kfontaction.cpp"