File indexing completed on 2024-04-28 03:59:05

 /*
     SPDX-FileCopyrightText: 1996 Bernd Johannes Wuebben <wuebben@kde.org>
     SPDX-FileCopyrightText: 1999 Preston Brown <pbrown@kde.org>
     SPDX-FileCopyrightText: 1999 Mario Weilguni <mweilguni@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kfontchooser.h"
 #include "fonthelpers_p.h"
 #include "ui_kfontchooserwidget.h"
 
 #include "loggingcategory.h"
 
 #include <QCheckBox>
 #include <QDoubleSpinBox>
 #include <QFontDatabase>
 #include <QGroupBox>
 #include <QGuiApplication>
 #include <QLabel>
 #include <QLayout>
 #include <QListWidget>
 #include <QLocale>
 #include <QScrollBar>
 #include <QSplitter>
 #include <QTextEdit>
 
 #include <algorithm>
 #include <cmath>
 
 // When message extraction needs to be avoided.
 #define TR_NOX tr
 
 static int minimumListWidth(const QListWidget *list)
 {
     QFontMetrics fm = list->fontMetrics();
 
     const int extraSpace = fm.horizontalAdvance(QLatin1Char(' ')) * 2;
 
     // Minimum initial size
     int width = 40;
     for (int i = 0, rows = list->count(); i < rows; ++i) {
         int itemWidth = fm.horizontalAdvance(list->item(i)->text());
         // ...and add a space on both sides for a not too tight look.
         itemWidth += extraSpace;
         width = std::max(width, itemWidth);
     }
 
     width += list->frameWidth() * 2;
     width += list->verticalScrollBar()->sizeHint().width();
     return width;
 }
 
 static int minimumListHeight(const QListWidget *list, int numVisibleEntry)
 {
     int w = list->count() > 0 ? list->visualItemRect(list->item(0)).height() : list->fontMetrics().lineSpacing();
 
     if (w < 0) {
         w = 10;
     }
     if (numVisibleEntry <= 0) {
         numVisibleEntry = 4;
     }
     return (w * numVisibleEntry + 2 * list->frameWidth());
 }
 
 static QString formatFontSize(qreal size)
 {
     return QLocale::system().toString(size, 'f', (size == floor(size)) ? 0 : 1);
 }
 
 class KFontChooserPrivate
 {
     Q_DECLARE_TR_FUNCTIONS(KFontChooser)
 
 public:
     KFontChooserPrivate(KFontChooser::DisplayFlags flags, KFontChooser *qq)
         : q(qq)
         , m_flags(flags)
     {
         m_palette.setColor(QPalette::Active, QPalette::Text, Qt::black);
         m_palette.setColor(QPalette::Active, QPalette::Base, Qt::white);
     }
 
     void init();
     void setFamilyBoxItems(const QStringList &fonts = {});
     int nearestSizeRow(qreal val, bool customize);
     qreal fillSizeList(const QList<qreal> &sizes = QList<qreal>());
     qreal setupSizeListBox(const QString &family, const QString &style);
 
     void setupDisplay();
     QString styleIdentifier(const QFont &font);
 
     void slotFamilySelected(const QString &);
     void slotSizeSelected(const QString &);
     void slotStyleSelected(const QString &);
     void displaySample(const QFont &font);
     void slotSizeValue(double);
 
     KFontChooser *q;
 
     std::unique_ptr<Ui_KFontChooserWidget> m_ui;
 
     KFontChooser::DisplayFlags m_flags = KFontChooser::NoDisplayFlags;
 
     QPalette m_palette;
 
     QFont m_selectedFont;
 
     QString m_selectedStyle;
     qreal m_selectedSize = -1.0;
 
     QString m_standardSizeAtCustom;
     int m_customSizeRow = -1;
 
     bool m_signalsAllowed = true;
     bool m_usingFixed = false;
 
     // Mappings of translated to Qt originated family and style strings.
     FontFamiliesMap m_qtFamilies;
     std::map<QString, QString> m_qtStyles;
     // Mapping of translated style strings to internal style identifiers.
     std::map<QString, QString> m_styleIDs;
 };
 
 KFontChooser::KFontChooser(QWidget *parent)
     : QWidget(parent)
     , d(new KFontChooserPrivate(KFontChooser::DisplayFrame, this))
 {
     d->init();
 }
 
 KFontChooser::KFontChooser(const DisplayFlags flags, QWidget *parent)
     : QWidget(parent)
     , d(new KFontChooserPrivate(flags, this))
 {
     d->init();
 }
 
 KFontChooser::~KFontChooser() = default;
 
 void KFontChooserPrivate::init()
 {
     m_usingFixed = m_flags & KFontChooser::FixedFontsOnly;
 
     // The main layout is divided horizontally into a top part with
     // the font attribute widgets (family, style, size) and a bottom
     // part with a preview of the selected font
     QVBoxLayout *mainLayout = new QVBoxLayout(q);
     mainLayout->setContentsMargins(0, 0, 0, 0);
 
     QWidget *page = m_flags & KFontChooser::DisplayFrame ? new QGroupBox(KFontChooser::tr("Requested Font", "@title:group"), q) : new QWidget(q);
     mainLayout->addWidget(page);
 
     m_ui.reset(new Ui_KFontChooserWidget);
     m_ui->setupUi(page);
     // Increase spacing on top of the preview field and then reset the other layouts
     // back to a standard value.
     m_ui->sampleTextEditLayout->setSpacing(q->style()->pixelMetric(QStyle::PM_LayoutVerticalSpacing));
     m_ui->mainHorizontalLayout->setSpacing(q->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing));
     m_ui->gridLayout->setVerticalSpacing(q->style()->pixelMetric(QStyle::PM_LayoutVerticalSpacing) * 2);
     m_ui->gridLayout->setHorizontalSpacing(q->style()->pixelMetric(QStyle::PM_LayoutHorizontalSpacing));
 
     // Deprecated, we'll call show() if building with deprecated code
     m_ui->sizeIsRelativeCheckBox->hide();
 
     const bool isDiffMode = m_flags & KFontChooser::ShowDifferences;
 
     QObject::connect(m_ui->familyListWidget, &QListWidget::currentTextChanged, [this](const QString &family) {
         slotFamilySelected(family);
     });
 
     if (isDiffMode) {
         m_ui->familyLabel->hide();
         m_ui->familyListWidget->setEnabled(false);
         QObject::connect(m_ui->familyCheckBox, &QCheckBox::toggled, m_ui->familyListWidget, &QWidget::setEnabled);
     } else {
         m_ui->familyCheckBox->hide();
     }
 
     setFamilyBoxItems();
 
     // If the calling app sets FixedFontsOnly, don't show the "show fixed only" checkbox
     m_ui->onlyFixedCheckBox->setVisible(!m_usingFixed);
 
     if (!m_ui->onlyFixedCheckBox->isHidden()) {
         QObject::connect(m_ui->onlyFixedCheckBox, &QCheckBox::toggled, q, [this](const bool state) {
             q->setFont(m_selectedFont, state);
         });
 
         if (isDiffMode) { // In this mode follow the state of the m_ui->familyCheckBox
             m_ui->onlyFixedCheckBox->setEnabled(false);
             QObject::connect(m_ui->familyCheckBox, &QCheckBox::toggled, m_ui->onlyFixedCheckBox, &QWidget::setEnabled);
         }
     }
 
     // Populate usual styles, to determine minimum list width;
     // will be replaced later with correct styles.
     m_ui->styleListWidget->addItem(KFontChooser::tr("Normal", "@item font"));
     m_ui->styleListWidget->addItem(KFontChooser::tr("Italic", "@item font"));
     m_ui->styleListWidget->addItem(KFontChooser::tr("Oblique", "@item font"));
     m_ui->styleListWidget->addItem(KFontChooser::tr("Bold", "@item font"));
     m_ui->styleListWidget->addItem(KFontChooser::tr("Bold Condensed Oblique", "@item font"));
     m_ui->styleListWidget->setMinimumWidth(minimumListWidth(m_ui->styleListWidget));
 
     QObject::connect(m_ui->styleListWidget, &QListWidget::currentTextChanged, [this](const QString &style) {
         slotStyleSelected(style);
     });
 
     if (isDiffMode) {
         m_ui->styleLabel->hide();
         m_ui->styleListWidget->setEnabled(false);
         QObject::connect(m_ui->styleCheckBox, &QCheckBox::toggled, m_ui->styleListWidget, &QWidget::setEnabled);
     } else {
         m_ui->styleCheckBox->hide();
     }
 
     // Populate with usual sizes, to determine minimum list width;
     // will be replaced later with correct sizes.
     fillSizeList();
 
     QObject::connect(m_ui->sizeSpinBox, &QDoubleSpinBox::valueChanged, [this](const double size) {
         slotSizeValue(size);
     });
 
     QObject::connect(m_ui->sizeListWidget, &QListWidget::currentTextChanged, [this](const QString &size) {
         slotSizeSelected(size);
     });
 
     if (isDiffMode) {
         m_ui->sizeLabel->hide();
         m_ui->sizeListWidget->setEnabled(false);
         m_ui->sizeSpinBox->setEnabled(false);
         QObject::connect(m_ui->sizeCheckBox, &QCheckBox::toggled, m_ui->sizeListWidget, &QWidget::setEnabled);
         QObject::connect(m_ui->sizeCheckBox, &QCheckBox::toggled, m_ui->sizeSpinBox, &QWidget::setEnabled);
     } else {
         m_ui->sizeCheckBox->hide();
     }
 
     QFont tmpFont(q->font().family(), 64, QFont::Black);
     m_ui->sampleTextEdit->setFont(tmpFont);
     m_ui->sampleTextEdit->setMinimumHeight(m_ui->sampleTextEdit->fontMetrics().lineSpacing());
     // tr: A classical test phrase, with all letters of the English alphabet.
     // Replace it with a sample text in your language, such that it is
     // representative of language's writing system.
     // If you wish, you can input several lines of text separated by \n.
     q->setSampleText(KFontChooser::tr("The Quick Brown Fox Jumps Over The Lazy Dog"));
     m_ui->sampleTextEdit->setTextCursor(QTextCursor(m_ui->sampleTextEdit->document()));
 
     QObject::connect(q, &KFontChooser::fontSelected, q, [this](const QFont &font) {
         displaySample(font);
     });
 
     // lets initialize the display if possible
     if (m_usingFixed) {
         q->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont), true);
     } else {
         q->setFont(QGuiApplication::font(), false);
     }
 
     // Set the minimum height for the list widgets
     q->setMinVisibleItems(4);
 
     // Set focus to the size list as this is the most commonly changed property
     m_ui->sizeListWidget->setFocus();
 }
 
 void KFontChooser::setColor(const QColor &col)
 {
     d->m_palette.setColor(QPalette::Active, QPalette::Text, col);
     QPalette pal = d->m_ui->sampleTextEdit->palette();
     pal.setColor(QPalette::Active, QPalette::Text, col);
     d->m_ui->sampleTextEdit->setPalette(pal);
     QTextCursor cursor = d->m_ui->sampleTextEdit->textCursor();
     d->m_ui->sampleTextEdit->selectAll();
     d->m_ui->sampleTextEdit->setTextColor(col);
     d->m_ui->sampleTextEdit->setTextCursor(cursor);
 }
 
 QColor KFontChooser::color() const
 {
     return d->m_palette.color(QPalette::Active, QPalette::Text);
 }
 
 void KFontChooser::setBackgroundColor(const QColor &col)
 {
     d->m_palette.setColor(QPalette::Active, QPalette::Base, col);
     QPalette pal = d->m_ui->sampleTextEdit->palette();
     pal.setColor(QPalette::Active, QPalette::Base, col);
     d->m_ui->sampleTextEdit->setPalette(pal);
 }
 
 QColor KFontChooser::backgroundColor() const
 {
     return d->m_palette.color(QPalette::Active, QPalette::Base);
 }
 
 QString KFontChooser::sampleText() const
 {
     return d->m_ui->sampleTextEdit->toPlainText();
 }
 
 void KFontChooser::setSampleText(const QString &text)
 {
     d->m_ui->sampleTextEdit->setPlainText(text);
 }
 
 void KFontChooser::setSampleBoxVisible(bool visible)
 {
     d->m_ui->sampleTextEdit->setVisible(visible);
 }
 
 QSize KFontChooser::sizeHint(void) const
 {
     return minimumSizeHint();
 }
 
 void KFontChooser::enableColumn(int column, bool state)
 {
     if (column & FamilyList) {
         d->m_ui->familyListWidget->setEnabled(state);
     }
     if (column & StyleList) {
         d->m_ui->styleListWidget->setEnabled(state);
     }
     if (column & SizeList) {
         d->m_ui->sizeListWidget->setEnabled(state);
         d->m_ui->sizeSpinBox->setEnabled(state);
     }
 }
 
 void KFontChooser::setFont(const QFont &aFont, bool onlyFixed)
 {
     d->m_selectedFont = aFont;
     d->m_selectedSize = aFont.pointSizeF();
     if (d->m_selectedSize == -1) {
         d->m_selectedSize = QFontInfo(aFont).pointSizeF();
     }
 
     if (onlyFixed != d->m_usingFixed) {
         d->m_usingFixed = onlyFixed;
         d->setFamilyBoxItems();
     }
     d->setupDisplay();
 }
 
 KFontChooser::FontDiffFlags KFontChooser::fontDiffFlags() const
 {
     FontDiffFlags diffFlags = NoFontDiffFlags;
 
     if (d->m_ui->familyCheckBox->isChecked()) {
         diffFlags |= FontDiffFamily;
     }
 
     if (d->m_ui->styleCheckBox->isChecked()) {
         diffFlags |= FontDiffStyle;
     }
 
     if (d->m_ui->sizeCheckBox->isChecked()) {
         diffFlags |= FontDiffSize;
     }
 
     return diffFlags;
 }
 
 QFont KFontChooser::font() const
 {
     return d->m_selectedFont;
 }
 
 static bool isDefaultFontStyleName(const QString &style)
 {
     /* clang-format off */
     // Ordered by commonness, i.e. "Regular" is the most common
     return style == QLatin1String("Regular")
         || style == QLatin1String("Normal")
         || style == QLatin1String("Book")
         || style == QLatin1String("Roman");
     /* clang-format on */
 }
 
 void KFontChooserPrivate::slotFamilySelected(const QString &family)
 {
     if (!m_signalsAllowed) {
         return;
     }
     m_signalsAllowed = false;
 
     QString currentFamily;
     if (family.isEmpty()) {
         Q_ASSERT(m_ui->familyListWidget->currentItem());
         if (m_ui->familyListWidget->currentItem()) {
             currentFamily = m_qtFamilies[m_ui->familyListWidget->currentItem()->text()];
         }
     } else {
         currentFamily = m_qtFamilies[family];
     }
 
     // Get the list of styles available in this family.
     QStringList styles = QFontDatabase::styles(currentFamily);
     if (styles.isEmpty()) {
         // Avoid extraction, it is in kdeqt.po
         styles.append(TR_NOX("Normal", "QFontDatabase"));
     }
 
     // Always prepend Regular, Normal, Book or Roman, this way if "m_selectedStyle"
     // in the code below is empty, selecting index 0 should work better
     std::sort(styles.begin(), styles.end(), [](const QString &a, const QString &b) {
         if (isDefaultFontStyleName(a)) {
             return true;
         } else if (isDefaultFontStyleName(b)) {
             return false;
         }
         return false;
     });
 
     // Filter style strings and add to the listbox.
     QString pureFamily;
     splitFontString(family, &pureFamily);
     QStringList filteredStyles;
     m_qtStyles.clear();
     m_styleIDs.clear();
 
     const QStringList origStyles = styles;
     for (const QString &style : origStyles) {
         // Sometimes the font database will report an invalid style,
         // that falls back back to another when set.
         // Remove such styles, by checking set/get round-trip.
         QFont testFont = QFontDatabase::font(currentFamily, style, 10);
         if (QFontDatabase::styleString(testFont) != style) {
             styles.removeAll(style);
             continue;
         }
 
         QString fstyle = tr("%1", "@item Font style").arg(style);
         if (!filteredStyles.contains(fstyle)) {
             filteredStyles.append(fstyle);
             m_qtStyles.insert({fstyle, style});
             m_styleIDs.insert({fstyle, styleIdentifier(testFont)});
         }
     }
     m_ui->styleListWidget->clear();
     m_ui->styleListWidget->addItems(filteredStyles);
 
     // Try to set the current style in the listbox to that previous.
     int listPos = filteredStyles.indexOf(m_selectedStyle.isEmpty() ? TR_NOX("Normal", "QFontDatabase") : m_selectedStyle);
     if (listPos < 0) {
         // Make extra effort to have Italic selected when Oblique was chosen,
         // and vice versa, as that is what the user would probably want.
         QString styleIt = tr("Italic", "@item font");
         QString styleOb = tr("Oblique", "@item font");
         for (int i = 0; i < 2; ++i) {
             int pos = m_selectedStyle.indexOf(styleIt);
             if (pos >= 0) {
                 QString style = m_selectedStyle;
                 style.replace(pos, styleIt.length(), styleOb);
                 listPos = filteredStyles.indexOf(style);
                 if (listPos >= 0) {
                     break;
                 }
             }
             qSwap(styleIt, styleOb);
         }
     }
     m_ui->styleListWidget->setCurrentRow(listPos >= 0 ? listPos : 0);
     const QString currentStyle = m_qtStyles[m_ui->styleListWidget->currentItem()->text()];
 
     // Recompute the size listbox for this family/style.
     qreal currentSize = setupSizeListBox(currentFamily, currentStyle);
     m_ui->sizeSpinBox->setValue(currentSize);
 
     m_selectedFont = QFontDatabase::font(currentFamily, currentStyle, static_cast<int>(currentSize));
     if (QFontDatabase::isSmoothlyScalable(currentFamily, currentStyle) && m_selectedFont.pointSize() == floor(currentSize)) {
         m_selectedFont.setPointSizeF(currentSize);
     }
     Q_EMIT q->fontSelected(m_selectedFont);
 
     m_signalsAllowed = true;
 }
 
 void KFontChooserPrivate::slotStyleSelected(const QString &style)
 {
     if (!m_signalsAllowed) {
         return;
     }
     m_signalsAllowed = false;
 
     const QString currentFamily = m_qtFamilies[m_ui->familyListWidget->currentItem()->text()];
     const QString currentStyle = !style.isEmpty() ? m_qtStyles[style] : m_qtStyles[m_ui->styleListWidget->currentItem()->text()];
 
     // Recompute the size listbox for this family/style.
     qreal currentSize = setupSizeListBox(currentFamily, currentStyle);
     m_ui->sizeSpinBox->setValue(currentSize);
 
     m_selectedFont = QFontDatabase::font(currentFamily, currentStyle, static_cast<int>(currentSize));
     if (QFontDatabase::isSmoothlyScalable(currentFamily, currentStyle) && m_selectedFont.pointSize() == floor(currentSize)) {
         m_selectedFont.setPointSizeF(currentSize);
     }
     Q_EMIT q->fontSelected(m_selectedFont);
 
     if (!style.isEmpty()) {
         m_selectedStyle = currentStyle;
     }
 
     m_signalsAllowed = true;
 }
 
 void KFontChooserPrivate::slotSizeSelected(const QString &size)
 {
     if (!m_signalsAllowed) {
         return;
     }
 
     m_signalsAllowed = false;
 
     qreal currentSize = 0.0;
     if (size.isEmpty()) {
         currentSize = QLocale::system().toDouble(m_ui->sizeListWidget->currentItem()->text());
     } else {
         currentSize = QLocale::system().toDouble(size);
     }
 
     // Reset the customized size slot in the list if not needed.
     if (m_customSizeRow >= 0 && m_selectedFont.pointSizeF() != currentSize) {
         m_ui->sizeListWidget->item(m_customSizeRow)->setText(m_standardSizeAtCustom);
         m_customSizeRow = -1;
     }
 
     m_ui->sizeSpinBox->setValue(currentSize);
     m_selectedFont.setPointSizeF(currentSize);
     Q_EMIT q->fontSelected(m_selectedFont);
 
     if (!size.isEmpty()) {
         m_selectedSize = currentSize;
     }
 
     m_signalsAllowed = true;
 }
 
 void KFontChooserPrivate::slotSizeValue(double dval)
 {
     if (!m_signalsAllowed) {
         return;
     }
     m_signalsAllowed = false;
 
     // We compare with qreal, so convert for platforms where qreal != double.
     qreal val = qreal(dval);
 
     // Reset current size slot in list if it was customized.
     if (m_customSizeRow >= 0 && m_ui->sizeListWidget->currentRow() == m_customSizeRow) {
         m_ui->sizeListWidget->item(m_customSizeRow)->setText(m_standardSizeAtCustom);
         m_customSizeRow = -1;
     }
 
     bool canCustomize = true;
 
     const QString family = m_qtFamilies[m_ui->familyListWidget->currentItem()->text()];
     const QString style = m_qtStyles[m_ui->styleListWidget->currentItem()->text()];
 
     // For Qt-bad-sizes workaround: skip this block unconditionally
     if (!QFontDatabase::isSmoothlyScalable(family, style)) {
         // Bitmap font, allow only discrete sizes.
         // Determine the nearest in the direction of change.
         canCustomize = false;
         int nrows = m_ui->sizeListWidget->count();
         int row = m_ui->sizeListWidget->currentRow();
         int nrow;
         if (val - m_selectedFont.pointSizeF() > 0) {
             for (nrow = row + 1; nrow < nrows; ++nrow) {
                 if (QLocale::system().toDouble(m_ui->sizeListWidget->item(nrow)->text()) >= val) {
                     break;
                 }
             }
         } else {
             for (nrow = row - 1; nrow >= 0; --nrow) {
                 if (QLocale::system().toDouble(m_ui->sizeListWidget->item(nrow)->text()) <= val) {
                     break;
                 }
             }
         }
         // Make sure the new row is not out of bounds.
         nrow = nrow < 0 ? 0 : nrow >= nrows ? nrows - 1 : nrow;
         // Get the size from the new row and set the spinbox to that size.
         val = QLocale::system().toDouble(m_ui->sizeListWidget->item(nrow)->text());
         m_ui->sizeSpinBox->setValue(val);
     }
 
     // Set the current size in the size listbox.
     int row = nearestSizeRow(val, canCustomize);
     m_ui->sizeListWidget->setCurrentRow(row);
 
     m_selectedSize = val;
     m_selectedFont.setPointSizeF(val);
     Q_EMIT q->fontSelected(m_selectedFont);
 
     m_signalsAllowed = true;
 }
 
 void KFontChooserPrivate::displaySample(const QFont &font)
 {
     m_ui->sampleTextEdit->setFont(font);
 }
 
 int KFontChooserPrivate::nearestSizeRow(qreal val, bool customize)
 {
     qreal diff = 1000;
     int row = 0;
     for (int r = 0; r < m_ui->sizeListWidget->count(); ++r) {
         qreal cval = QLocale::system().toDouble(m_ui->sizeListWidget->item(r)->text());
         if (qAbs(cval - val) < diff) {
             diff = qAbs(cval - val);
             row = r;
         }
     }
     // For Qt-bad-sizes workaround: ignore value of customize, use true
     if (customize && diff > 0) {
         m_customSizeRow = row;
         m_standardSizeAtCustom = m_ui->sizeListWidget->item(row)->text();
         m_ui->sizeListWidget->item(row)->setText(formatFontSize(val));
     }
     return row;
 }
 
 qreal KFontChooserPrivate::fillSizeList(const QList<qreal> &sizes_)
 {
     if (m_ui->sizeListWidget->isHidden()) {
         qCWarning(KWidgetsAddonsLog) << "Trying to fill the font size listwidget, but the widget is hidden.";
         return 0.0;
     }
 
     QList<qreal> sizes = sizes_;
     bool canCustomize = false;
     if (sizes.isEmpty()) {
         static const int c[] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28, 32, 48, 64, 72, 80, 96, 128, 0};
         for (int i = 0; c[i]; ++i) {
             sizes.append(c[i]);
         }
         // Since sizes were not supplied, this is a vector font,
         // and size slot customization is allowed.
         canCustomize = true;
     }
 
     // Insert sizes into the listbox.
     m_ui->sizeListWidget->clear();
     std::sort(sizes.begin(), sizes.end());
     for (qreal size : std::as_const(sizes)) {
         m_ui->sizeListWidget->addItem(formatFontSize(size));
     }
 
     // Return the nearest to selected size.
     // If the font is vector, the nearest size is always same as selected,
     // thus size slot customization is allowed.
     // If the font is bitmap, the nearest size need not be same as selected,
     // thus size slot customization is not allowed.
     m_customSizeRow = -1;
     int row = nearestSizeRow(m_selectedSize, canCustomize);
     return QLocale::system().toDouble(m_ui->sizeListWidget->item(row)->text());
 }
 
 qreal KFontChooserPrivate::setupSizeListBox(const QString &family, const QString &style)
 {
     QList<qreal> sizes;
     const bool smoothlyScalable = QFontDatabase::isSmoothlyScalable(family, style);
     if (!smoothlyScalable) {
         const QList<int> smoothSizes = QFontDatabase::smoothSizes(family, style);
         for (int size : smoothSizes) {
             sizes.append(size);
         }
     }
 
     // Fill the listbox (uses default list of sizes if the given is empty).
     // Collect the best fitting size to selected size, to use if not smooth.
     qreal bestFitSize = fillSizeList(sizes);
 
     // Set the best fit size as current in the listbox if available.
     const QList<QListWidgetItem *> selectedSizeList = m_ui->sizeListWidget->findItems(formatFontSize(bestFitSize), Qt::MatchExactly);
     if (!selectedSizeList.isEmpty()) {
         m_ui->sizeListWidget->setCurrentItem(selectedSizeList.first());
     }
 
     return bestFitSize;
 }
 
 void KFontChooserPrivate::setupDisplay()
 {
     qreal size = m_selectedFont.pointSizeF();
     if (size == -1) {
         size = QFontInfo(m_selectedFont).pointSizeF();
     }
 
     int numEntries;
     int i;
 
     // Get the styleID here before familyListWidget->setCurrentRow() is called
     // as it may change the font style
     const QString styleID = styleIdentifier(m_selectedFont);
 
     QString family = m_selectedFont.family().toLower();
     // Direct family match.
     numEntries = m_ui->familyListWidget->count();
     for (i = 0; i < numEntries; ++i) {
         if (family == m_qtFamilies[m_ui->familyListWidget->item(i)->text()].toLower()) {
             m_ui->familyListWidget->setCurrentRow(i);
             break;
         }
     }
 
     // 1st family fallback.
     if (i == numEntries) {
         const int bracketPos = family.indexOf(QLatin1Char('['));
         if (bracketPos != -1) {
             family = QStringView(family).left(bracketPos).trimmed().toString();
             for (i = 0; i < numEntries; ++i) {
                 if (family == m_qtFamilies[m_ui->familyListWidget->item(i)->text()].toLower()) {
                     m_ui->familyListWidget->setCurrentRow(i);
                     break;
                 }
             }
         }
     }
 
     // 2nd family fallback.
     if (i == numEntries) {
         QString fallback = family + QLatin1String(" [");
         for (i = 0; i < numEntries; ++i) {
             if (m_qtFamilies[m_ui->familyListWidget->item(i)->text()].toLower().startsWith(fallback)) {
                 m_ui->familyListWidget->setCurrentRow(i);
                 break;
             }
         }
     }
 
     // 3rd family fallback.
     if (i == numEntries) {
         for (i = 0; i < numEntries; ++i) {
             if (m_qtFamilies[m_ui->familyListWidget->item(i)->text()].toLower().startsWith(family)) {
                 m_ui->familyListWidget->setCurrentRow(i);
                 break;
             }
         }
     }
 
     // Family fallback in case nothing matched. Otherwise, diff doesn't work
     if (i == numEntries) {
         m_ui->familyListWidget->setCurrentRow(0);
     }
 
     // By setting the current item in the family box, the available
     // styles and sizes for that family have been collected.
     // Try now to set the current items in the style and size boxes.
 
     // Set current style in the listbox.
     numEntries = m_ui->styleListWidget->count();
     for (i = 0; i < numEntries; ++i) {
         if (styleID == m_styleIDs[m_ui->styleListWidget->item(i)->text()]) {
             m_ui->styleListWidget->setCurrentRow(i);
             break;
         }
     }
     if (i == numEntries) {
         // Style not found, fallback.
         m_ui->styleListWidget->setCurrentRow(0);
     }
 
     // Set current size in the listbox.
     // If smoothly scalable, allow customizing one of the standard size slots,
     // otherwise just select the nearest available size.
     const QString currentFamily = m_qtFamilies[m_ui->familyListWidget->currentItem()->text()];
     const QString currentStyle = m_qtStyles[m_ui->styleListWidget->currentItem()->text()];
     const bool canCustomize = QFontDatabase::isSmoothlyScalable(currentFamily, currentStyle);
     m_ui->sizeListWidget->setCurrentRow(nearestSizeRow(size, canCustomize));
 
     // Set current size in the spinbox.
     m_ui->sizeSpinBox->setValue(QLocale::system().toDouble(m_ui->sizeListWidget->currentItem()->text()));
 }
 
 // static
 QStringList KFontChooser::createFontList(uint fontListCriteria)
 {
     QStringList lstSys(QFontDatabase::families());
 
     // if we have criteria; then check fonts before adding
     if (fontListCriteria) {
         QStringList lstFonts;
         for (const QString &family : std::as_const(lstSys)) {
             if ((fontListCriteria & FixedWidthFonts) > 0 && !QFontDatabase::isFixedPitch(family)) {
                 continue;
             }
             if (((fontListCriteria & (SmoothScalableFonts | ScalableFonts)) == ScalableFonts) && !QFontDatabase::isBitmapScalable(family)) {
                 continue;
             }
             if ((fontListCriteria & SmoothScalableFonts) > 0 && !QFontDatabase::isSmoothlyScalable(family)) {
                 continue;
             }
             lstFonts.append(family);
         }
 
         if ((fontListCriteria & FixedWidthFonts) > 0) {
             // Fallback.. if there are no fixed fonts found, it's probably a
             // bug in the font server or Qt.  In this case, just use 'fixed'
             if (lstFonts.isEmpty()) {
                 lstFonts.append(QStringLiteral("fixed"));
             }
         }
 
         lstSys = lstFonts;
     }
 
     lstSys.sort();
 
     return lstSys;
 }
 
 void KFontChooser::setFontListItems(const QStringList &fontList)
 {
     d->setFamilyBoxItems(fontList);
 }
 
 void KFontChooserPrivate::setFamilyBoxItems(const QStringList &fonts)
 {
     m_signalsAllowed = false;
 
     m_ui->familyListWidget->clear();
 
     m_qtFamilies = translateFontNameList(!fonts.isEmpty() ? fonts : KFontChooser::createFontList(m_usingFixed ? KFontChooser::FixedWidthFonts : 0));
 
     QStringList list;
     list.reserve(m_qtFamilies.size());
 
     // Generic font names
     const QStringList genericTranslatedNames{
         translateFontName(QStringLiteral("Sans Serif")),
         translateFontName(QStringLiteral("Serif")),
         translateFontName(QStringLiteral("Monospace")),
     };
 
     // Add generic family names to the top of the list
     for (const QString &s : genericTranslatedNames) {
         auto nIt = m_qtFamilies.find(s);
         if (nIt != m_qtFamilies.cend()) {
             list.push_back(s);
         }
     }
 
     for (auto it = m_qtFamilies.cbegin(); it != m_qtFamilies.cend(); ++it) {
         const QString &name = it->first;
         if (genericTranslatedNames.contains(name)) {
             continue;
         }
 
         list.push_back(name);
     }
 
     m_ui->familyListWidget->addItems(list);
     m_ui->familyListWidget->setMinimumWidth(minimumListWidth(m_ui->familyListWidget));
 
     m_signalsAllowed = true;
 }
 
 void KFontChooser::setMinVisibleItems(int visibleItems)
 {
     for (auto *widget : {d->m_ui->familyListWidget, d->m_ui->styleListWidget, d->m_ui->sizeListWidget}) {
         widget->setMinimumHeight(minimumListHeight(widget, visibleItems));
     }
 }
 
 // Human-readable style identifiers returned by QFontDatabase::styleString()
 // do not always survive round trip of QFont serialization/deserialization,
 // causing wrong style in the style box to be highlighted when
 // the chooser dialog is opened. This will cause the style to be changed
 // when the dialog is closed and the user did not touch the style box.
 // Hence, construct custom style identifiers sufficient for the purpose.
 QString KFontChooserPrivate::styleIdentifier(const QFont &font)
 {
     const int weight = font.weight();
     QString styleName = font.styleName();
     // If the styleName property is empty and the weight is QFont::Normal, that
     // could mean it's a "Regular"-like style with the styleName part stripped
     // so that subsequent calls to setBold(true) can work properly (i.e. selecting
     // the "Bold" style provided by the font itself) without resorting to font
     // "emboldening" which looks ugly.
     // See also KConfigGroupGui::writeEntryGui().
     if (styleName.isEmpty() && weight == QFont::Normal) {
         const QStringList styles = QFontDatabase::styles(font.family());
         for (const QString &style : styles) {
             if (isDefaultFontStyleName(style)) {
                 styleName = style;
                 break;
             } else {
                 // nothing more we can do
             }
         }
     }
 
     const QChar comma(QLatin1Char(','));
     return QString::number(weight) + comma //
         + QString::number((int)font.style()) + comma //
         + QString::number(font.stretch()) + comma //
         + styleName;
 }
 
 #include "moc_kfontchooser.cpp"