File indexing completed on 2024-05-12 03:54:27

 /*
     This file is part of the KDE libraries
     SPDX-FileCopyrightText: 2007 Thiago Macieira <thiago@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kconfiggui_export.h"
 #include <kconfiggroup.h>
 
 #include <QColor>
 #include <QDebug>
 #include <QFont>
 
 #include <kconfiggroup_p.h>
 
 /**
  * Try to read a GUI type from config group @p cg at key @p key.
  * @p input is the default value and also indicates the type to be read.
  * @p output is to be set with the value that has been read.
  *
  * @returns true if something was handled (even if output was set to clear or default)
  *          or false if nothing was handled (e.g., Core type)
  */
 static bool readEntryGui(const QByteArray &data, const char *key, const QVariant &input, QVariant &output)
 {
     const auto errString = [&]() {
         return QStringLiteral("\"%1\" - conversion from \"%3\" to %2 failed")
             .arg(QLatin1String(key), QLatin1String(input.typeName()), QLatin1String(data.constData()));
     };
 
     // set in case of failure
     output = input;
 
     switch (static_cast<QMetaType::Type>(input.userType())) {
     case QMetaType::QColor: {
         if (data.isEmpty() || data == "invalid") {
             output = QColor(); // return what was stored
             return true;
         } else if (data.at(0) == '#') {
             QColor col = QColor::fromString(QUtf8StringView(data.constData(), data.length()));
             if (!col.isValid()) {
                 qCritical() << qPrintable(errString());
             }
             output = col;
             return true;
         } else if (!data.contains(',')) {
             QColor col = QColor::fromString(QUtf8StringView(data.constData(), data.length()));
             if (!col.isValid()) {
                 qCritical() << qPrintable(errString());
             }
             output = col;
             return true;
         } else {
             const QList<QByteArray> list = data.split(',');
             const int count = list.count();
 
             if (count != 3 && count != 4) {
                 qCritical() //
                     << qPrintable(errString()) //
                     << qPrintable(QStringLiteral(" (wrong format: expected '%1' items, read '%2')").arg(QStringLiteral("3' or '4")).arg(count));
                 return true; // return default
             }
 
             int temp[4];
             // bounds check components
             for (int i = 0; i < count; i++) {
                 bool ok;
                 const int j = temp[i] = list.at(i).toInt(&ok);
                 if (!ok) { // failed to convert to int
                     qCritical() << qPrintable(errString()) << " (integer conversion failed)";
                     return true; // return default
                 }
                 if (j < 0 || j > 255) {
                     static const char *const components[] = {"red", "green", "blue", "alpha"};
                     qCritical() << qPrintable(errString())
                                 << qPrintable(QStringLiteral(" (bounds error: %1 component %2)")
                                                   .arg(QLatin1String(components[i]), //
                                                        j < 0 ? QStringLiteral("< 0") : QStringLiteral("> 255")));
                     return true; // return default
                 }
             }
             QColor aColor(temp[0], temp[1], temp[2]);
             if (count == 4) {
                 aColor.setAlpha(temp[3]);
             }
 
             if (aColor.isValid()) {
                 output = aColor;
             } else {
                 qCritical() << qPrintable(errString());
             }
             return true;
         }
     }
 
     case QMetaType::QFont: {
         QVariant tmp = QString::fromUtf8(data.constData(), data.length());
         if (tmp.canConvert<QFont>()) {
             output = tmp;
         } else {
             qCritical() << qPrintable(errString());
         }
         return true;
     }
     case QMetaType::QPixmap:
     case QMetaType::QImage:
     case QMetaType::QBrush:
     case QMetaType::QPalette:
     case QMetaType::QIcon:
     case QMetaType::QRegion:
     case QMetaType::QBitmap:
     case QMetaType::QCursor:
     case QMetaType::QSizePolicy:
     case QMetaType::QPen:
         // we may want to handle these in the future
 
     default:
         break;
     }
 
     return false; // not handled
 }
 
 /**
  * Try to write a GUI type @p prop to config group @p cg at key @p key.
  *
  * @returns true if something was handled (even if an empty value was written)
  *          or false if nothing was handled (e.g., Core type)
  */
 static bool writeEntryGui(KConfigGroup *cg, const char *key, const QVariant &prop, KConfigGroup::WriteConfigFlags pFlags)
 {
     switch (static_cast<QMetaType::Type>(prop.userType())) {
     case QMetaType::QColor: {
         const QColor rColor = prop.value<QColor>();
 
         if (!rColor.isValid()) {
             cg->writeEntry(key, "invalid", pFlags);
             return true;
         }
 
         QList<int> list;
         list.insert(0, rColor.red());
         list.insert(1, rColor.green());
         list.insert(2, rColor.blue());
         if (rColor.alpha() != 255) {
             list.insert(3, rColor.alpha());
         }
 
         cg->writeEntry(key, list, pFlags);
         return true;
     }
     case QMetaType::QFont: {
         QFont f = prop.value<QFont>();
         // If the styleName property is set for a QFont, using setBold(true) would
         // lead to Qt using an "emboldended"/synthetic font style instead of using
         // the bold style provided by the font itself; the latter looks much better
         // than the former. For more details see:
         // https://bugreports.qt.io/browse/QTBUG-63792
         // https://bugs.kde.org/show_bug.cgi?id=378523
         /* clang-format off */
         if (f.weight() == QFont::Normal
             && (f.styleName() == QLatin1String("Regular")
                 || f.styleName() == QLatin1String("Normal")
                 || f.styleName() == QLatin1String("Book")
                 || f.styleName() == QLatin1String("Roman"))) { /* clang-format on */
             f.setStyleName(QString());
         }
         cg->writeEntry(key, f.toString().toUtf8(), pFlags);
         return true;
     }
     case QMetaType::QPixmap:
     case QMetaType::QImage:
     case QMetaType::QBrush:
     case QMetaType::QPalette:
     case QMetaType::QIcon:
     case QMetaType::QRegion:
     case QMetaType::QBitmap:
     case QMetaType::QCursor:
     case QMetaType::QSizePolicy:
     case QMetaType::QPen:
         // we may want to handle one of these in the future
         break;
 
     default:
         break;
     }
 
     return false;
 }
 
 // Not static, because for static builds we use it in the kconfigguistaticinitializer.cpp file
 // Exported as we need this to force linking in consumers that read GUI types from KConfig, but
 // which are otherwise not using this library (and thus linking with --as-needed or MSVC would
 // break things)
 KCONFIGGUI_EXPORT int initKConfigGroupGui()
 {
     _kde_internal_KConfigGroupGui.readEntryGui = readEntryGui;
     _kde_internal_KConfigGroupGui.writeEntryGui = writeEntryGui;
     return 42; // because 42 is nicer than 1 or 0
 }
 
 #ifdef Q_CONSTRUCTOR_FUNCTION
 Q_CONSTRUCTOR_FUNCTION(initKConfigGroupGui)
 #else
 static int dummyKConfigGroupGui = initKConfigGroupGui();
 #endif