Backport changes to v5.0.x branch

PR #21679.

src/gui/advancedsettings.cpp

@@ -588,6 +588,7 @@ void AdvancedSettings::loadAdvancedSettings()
     m_comboBoxDiskIOType.addItem(tr("Default"), QVariant::fromValue(BitTorrent::DiskIOType::Default));
     m_comboBoxDiskIOType.addItem(tr("Memory mapped files"), QVariant::fromValue(BitTorrent::DiskIOType::MMap));
     m_comboBoxDiskIOType.addItem(tr("POSIX-compliant"), QVariant::fromValue(BitTorrent::DiskIOType::Posix));
+    m_comboBoxDiskIOType.addItem(tr("Simple pread/pwrite"), QVariant::fromValue(BitTorrent::DiskIOType::SimplePreadPwrite));
     m_comboBoxDiskIOType.setCurrentIndex(m_comboBoxDiskIOType.findData(QVariant::fromValue(session->diskIOType())));
     addRow(DISK_IO_TYPE, tr("Disk IO type (requires restart)") + u' ' + makeLink(u"https://www.libtorrent.org/single-page-ref.html#default-disk-io-constructor", u"(?)")
            , &m_comboBoxDiskIOType);

src/gui/guiaddtorrentmanager.cpp

@@ -175,7 +175,8 @@ void GUIAddTorrentManager::onMetadataDownloaded(const BitTorrent::TorrentInfo &m
     }
 }
 
-bool GUIAddTorrentManager::processTorrent(const QString &source, const BitTorrent::TorrentDescriptor &torrentDescr, const BitTorrent::AddTorrentParams &params)
+bool GUIAddTorrentManager::processTorrent(const QString &source
+        , const BitTorrent::TorrentDescriptor &torrentDescr, const BitTorrent::AddTorrentParams &params)
 {
     const bool hasMetadata = torrentDescr.info().has_value();
     const BitTorrent::InfoHash infoHash = torrentDescr.infoHash();
@@ -183,32 +184,39 @@ bool GUIAddTorrentManager::processTorrent(const QString &source, const BitTorren
     // Prevent showing the dialog if download is already present
     if (BitTorrent::Torrent *torrent = btSession()->findTorrent(infoHash))
     {
-        if (hasMetadata)
+        if (Preferences::instance()->confirmMergeTrackers())
         {
-            // Trying to set metadata to existing torrent in case if it has none
-            torrent->setMetadata(*torrentDescr.info());
-        }
+            if (hasMetadata)
+            {
+                // Trying to set metadata to existing torrent in case if it has none
+                torrent->setMetadata(*torrentDescr.info());
+            }
 
-        if (torrent->isPrivate() || (hasMetadata && torrentDescr.info()->isPrivate()))
-        {
-            handleDuplicateTorrent(source, torrent, tr("Trackers cannot be merged because it is a private torrent"));
+            const bool isPrivate = torrent->isPrivate() || (hasMetadata && torrentDescr.info()->isPrivate());
+            const QString dialogCaption = tr("Torrent is already present");
+            if (isPrivate)
+            {
+                // We cannot merge trackers for private torrent but we still notify user
+                // about duplicate torrent if confirmation dialog is enabled.
+                RaisedMessageBox::warning(app()->mainWindow(), dialogCaption
+                        , tr("Trackers cannot be merged because it is a private torrent."));
+            }
+            else
+            {
+                const bool mergeTrackers = btSession()->isMergeTrackersEnabled();
+                const QMessageBox::StandardButton btn = RaisedMessageBox::question(app()->mainWindow(), dialogCaption
+                        , tr("Torrent '%1' is already in the transfer list. Do you want to merge trackers from new source?").arg(torrent->name())
+                        , (QMessageBox::Yes | QMessageBox::No), (mergeTrackers ? QMessageBox::Yes : QMessageBox::No));
+                if (btn == QMessageBox::Yes)
+                {
+                    torrent->addTrackers(torrentDescr.trackers());
+                    torrent->addUrlSeeds(torrentDescr.urlSeeds());
+                }
+            }
         }
         else
         {
-            bool mergeTrackers = btSession()->isMergeTrackersEnabled();
-            if (Preferences::instance()->confirmMergeTrackers())
-            {
-                const QMessageBox::StandardButton btn = RaisedMessageBox::question(app()->mainWindow(), tr("Torrent is already present")
-                        , tr("Torrent '%1' is already in the transfer list. Do you want to merge trackers from new source?").arg(torrent->name())
-                        , (QMessageBox::Yes | QMessageBox::No), QMessageBox::Yes);
-                mergeTrackers = (btn == QMessageBox::Yes);
-            }
-
-            if (mergeTrackers)
-            {
-                torrent->addTrackers(torrentDescr.trackers());
-                torrent->addUrlSeeds(torrentDescr.urlSeeds());
-            }
+            handleDuplicateTorrent(source, torrentDescr, torrent);
         }
 
         return false;

src/gui/optionsdialog.cpp

@@ -30,6 +30,7 @@
 
 #include "optionsdialog.h"
 
+#include <algorithm>
 #include <chrono>
 #include <cstdlib>
 #include <limits>
@@ -44,6 +45,10 @@
 #include <QSystemTrayIcon>
 #include <QTranslator>
 
+#ifdef Q_OS_WIN
+#include <QStyleFactory>
+#endif
+
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/sharelimitaction.h"
 #include "base/exceptions.h"
@@ -56,6 +61,7 @@
 #include "base/rss/rss_session.h"
 #include "base/torrentfileguard.h"
 #include "base/torrentfileswatcher.h"
+#include "base/utils/compare.h"
 #include "base/utils/io.h"
 #include "base/utils/misc.h"
 #include "base/utils/net.h"
@@ -236,6 +242,8 @@ void OptionsDialog::loadBehaviorTabOptions()
     initializeLanguageCombo();
     setLocale(pref->getLocale());
 
+    initializeStyleCombo();
+
     m_ui->checkUseCustomTheme->setChecked(Preferences::instance()->useCustomUITheme());
     m_ui->customThemeFilePath->setSelectedPath(Preferences::instance()->customUIThemePath());
     m_ui->customThemeFilePath->setMode(FileSystemPathEdit::Mode::FileOpen);
@@ -345,7 +353,11 @@ void OptionsDialog::loadBehaviorTabOptions()
 
     m_ui->checkBoxPerformanceWarning->setChecked(session->isPerformanceWarningEnabled());
 
-    connect(m_ui->comboI18n, qComboBoxCurrentIndexChanged, this, &ThisType::enableApplyButton);
+    connect(m_ui->comboLanguage, qComboBoxCurrentIndexChanged, this, &ThisType::enableApplyButton);
+
+#ifdef Q_OS_WIN
+    connect(m_ui->comboStyle, qComboBoxCurrentIndexChanged, this, &ThisType::enableApplyButton);
+#endif
 
 #if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS))
     connect(m_ui->checkUseSystemIcon, &QAbstractButton::toggled, this, &ThisType::enableApplyButton);
@@ -443,6 +455,13 @@ void OptionsDialog::saveBehaviorTabOptions() const
     }
     pref->setLocale(locale);
 
+#ifdef Q_OS_WIN
+    if (const QVariant systemStyle = m_ui->comboStyle->currentData(); systemStyle.isValid())
+        pref->setStyle(systemStyle.toString());
+    else
+        pref->setStyle(m_ui->comboStyle->currentText());
+#endif
+
 #if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS))
     pref->useSystemIcons(m_ui->checkUseSystemIcon->isChecked());
 #endif
@@ -1387,7 +1406,7 @@ void OptionsDialog::initializeLanguageCombo()
     for (const QString &langFile : langFiles)
     {
         const QString langCode = QStringView(langFile).sliced(12).chopped(3).toString(); // remove "qbittorrent_" and ".qm"
-        m_ui->comboI18n->addItem(Utils::Misc::languageToLocalizedString(langCode), langCode);
+        m_ui->comboLanguage->addItem(Utils::Misc::languageToLocalizedString(langCode), langCode);
     }
 }
 
@@ -1672,6 +1691,33 @@ bool OptionsDialog::isSplashScreenDisabled() const
     return !m_ui->checkShowSplash->isChecked();
 }
 
+void OptionsDialog::initializeStyleCombo()
+{
+#ifdef Q_OS_WIN
+    m_ui->labelStyleHint->setText(tr("%1 is recommended for best compatibility with Windows dark mode"
+                        , "Fusion is recommended for best compatibility with Windows dark mode").arg(u"Fusion"_s));
+    m_ui->comboStyle->addItem(tr("System", "System default Qt style"), u"system"_s);
+    m_ui->comboStyle->setItemData(0, tr("Let Qt decide the style for this system"), Qt::ToolTipRole);
+    m_ui->comboStyle->insertSeparator(1);
+
+    QStringList styleNames = QStyleFactory::keys();
+    std::sort(styleNames.begin(), styleNames.end(), Utils::Compare::NaturalLessThan<Qt::CaseInsensitive>());
+    m_ui->comboStyle->addItems(styleNames);
+    const QString prefStyleName = Preferences::instance()->getStyle();
+    const QString selectedStyleName = prefStyleName.isEmpty() ? QApplication::style()->name() : prefStyleName;
+
+    if (selectedStyleName.compare(u"system"_s, Qt::CaseInsensitive) != 0)
+        m_ui->comboStyle->setCurrentText(selectedStyleName);
+#else
+    m_ui->labelStyle->hide();
+    m_ui->comboStyle->hide();
+    m_ui->labelStyleHint->hide();
+    m_ui->UISettingsBoxLayout->removeWidget(m_ui->labelStyle);
+    m_ui->UISettingsBoxLayout->removeWidget(m_ui->comboStyle);
+    m_ui->UISettingsBoxLayout->removeWidget(m_ui->labelStyleHint);
+#endif
+}
+
 #ifdef Q_OS_WIN
 bool OptionsDialog::WinStartup() const
 {
@@ -1721,7 +1767,7 @@ QString OptionsDialog::getProxyPassword() const
 // Locale Settings
 QString OptionsDialog::getLocale() const
 {
-    return m_ui->comboI18n->itemData(m_ui->comboI18n->currentIndex(), Qt::UserRole).toString();
+    return m_ui->comboLanguage->itemData(m_ui->comboLanguage->currentIndex(), Qt::UserRole).toString();
 }
 
 void OptionsDialog::setLocale(const QString &localeStr)
@@ -1746,7 +1792,7 @@ void OptionsDialog::setLocale(const QString &localeStr)
             name = locale.name();
     }
     // Attempt to find exact match
-    int index = m_ui->comboI18n->findData(name, Qt::UserRole);
+    int index = m_ui->comboLanguage->findData(name, Qt::UserRole);
     if (index < 0)
     {
         //Attempt to find a language match without a country
@@ -1754,16 +1800,16 @@ void OptionsDialog::setLocale(const QString &localeStr)
         if (pos > -1)
         {
             QString lang = name.left(pos);
-            index = m_ui->comboI18n->findData(lang, Qt::UserRole);
+            index = m_ui->comboLanguage->findData(lang, Qt::UserRole);
         }
     }
     if (index < 0)
     {
         // Unrecognized, use US English
-        index = m_ui->comboI18n->findData(u"en"_s, Qt::UserRole);
+        index = m_ui->comboLanguage->findData(u"en"_s, Qt::UserRole);
         Q_ASSERT(index >= 0);
     }
-    m_ui->comboI18n->setCurrentIndex(index);
+    m_ui->comboLanguage->setCurrentIndex(index);
 }
 
 Path OptionsDialog::getTorrentExportDir() const
@@ -1869,7 +1915,7 @@ Path OptionsDialog::getFilter() const
 void OptionsDialog::webUIHttpsCertChanged(const Path &path)
 {
     const auto readResult = Utils::IO::readFile(path, Utils::Net::MAX_SSL_FILE_SIZE);
-    const bool isCertValid = !Utils::SSLKey::load(readResult.value_or(QByteArray())).isNull();
+    const bool isCertValid = Utils::Net::isSSLCertificatesValid(readResult.value_or(QByteArray()));
 
     m_ui->textWebUIHttpsCert->setSelectedPath(path);
     m_ui->lblSslCertStatus->setPixmap(UIThemeManager::instance()->getScaledPixmap(

src/gui/optionsdialog.h

@@ -1,6 +1,6 @@
 /*
  * Bittorrent Client using Qt and libtorrent.
- * Copyright (C) 2023  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2023-2024  Vladimir Golovnev <glassez@yandex.ru>
  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
  *
  * This program is free software; you can redistribute it and/or
@@ -143,6 +143,7 @@ private:
 
     // General options
     void initializeLanguageCombo();
+    void initializeStyleCombo();
     QString getLocale() const;
     bool isSplashScreenDisabled() const;
 #ifdef Q_OS_WIN

src/gui/optionsdialog.ui

@@ -132,9 +132,9 @@
               <property name="title">
                <string>Interface</string>
               </property>
-              <layout class="QGridLayout" name="gridLayout_81">
+              <layout class="QGridLayout" name="UISettingsBoxLayout">
                <item row="0" column="0" colspan="3">
-                <widget class="QLabel" name="label_15">
+                <widget class="QLabel" name="labelRestartRequired">
                  <property name="font">
                   <font>
                    <italic>true</italic>
@@ -146,17 +146,17 @@
                 </widget>
                </item>
                <item row="1" column="0">
-                <widget class="QLabel" name="label_9">
+                <widget class="QLabel" name="labelLanguage">
                  <property name="text">
                   <string>Language:</string>
                  </property>
                 </widget>
                </item>
                <item row="1" column="1">
-                <widget class="QComboBox" name="comboI18n"/>
+                <widget class="QComboBox" name="comboLanguage"/>
                </item>
                <item row="1" column="2">
-                <spacer name="horizontalSpacer_111">
+                <spacer name="spacerLanguage">
                  <property name="orientation">
                   <enum>Qt::Horizontal</enum>
                  </property>
@@ -168,7 +168,26 @@
                  </property>
                 </spacer>
                </item>
-               <item row="2" column="0" colspan="3">
+               <item row="2" column="0">
+                <widget class="QLabel" name="labelStyle">
+                 <property name="text">
+                  <string>Style:</string>
+                 </property>
+                </widget>
+               </item>
+               <item row="2" column="1">
+                <widget class="QComboBox" name="comboStyle"/>
+               </item>
+               <item row="2" column="2">
+                <widget class="QLabel" name="labelStyleHint">
+                 <property name="font">
+                  <font>
+                   <italic>true</italic>
+                  </font>
+                 </property>
+                </widget>
+               </item>
+               <item row="3" column="0" colspan="3">
                 <widget class="QGroupBox" name="checkUseCustomTheme">
                  <property name="title">
                   <string>Use custom UI Theme</string>
@@ -190,14 +209,14 @@
                  </layout>
                 </widget>
                </item>
-               <item row="3" column="0" colspan="2">
+               <item row="4" column="0" colspan="2">
                 <widget class="QCheckBox" name="checkUseSystemIcon">
                  <property name="text">
                   <string>Use icons from system theme</string>
                  </property>
                 </widget>
                </item>
-               <item row="4" column="0" colspan="2">
+               <item row="5" column="0" colspan="2">
                 <widget class="QPushButton" name="buttonCustomizeUITheme">
                  <property name="text">
                   <string>Customize UI Theme...</string>
@@ -3881,7 +3900,7 @@ Use ';' to split multiple entries. Can use wildcard '*'.</string>
  </customwidgets>
  <tabstops>
   <tabstop>tabOption</tabstop>
-  <tabstop>comboI18n</tabstop>
+  <tabstop>comboLanguage</tabstop>
   <tabstop>checkUseCustomTheme</tabstop>
   <tabstop>customThemeFilePath</tabstop>
   <tabstop>checkAddStopped</tabstop>

src/gui/properties/piecesbar.cpp

@@ -42,7 +42,6 @@
 #include "base/indexrange.h"
 #include "base/path.h"
 #include "base/utils/misc.h"
-#include "gui/uithememanager.h"
 
 namespace
 {
@@ -119,13 +118,7 @@ PiecesBar::PiecesBar(QWidget *parent)
     : QWidget(parent)
 {
     setMouseTracking(true);
-
     updateColorsImpl();
-    connect(UIThemeManager::instance(), &UIThemeManager::themeChanged, this, [this]
-    {
-        updateColors();
-        redraw();
-    });
 }
 
 void PiecesBar::setTorrent(const BitTorrent::Torrent *torrent)
@@ -143,12 +136,19 @@ void PiecesBar::clear()
 
 bool PiecesBar::event(QEvent *e)
 {
-    if (e->type() == QEvent::ToolTip)
+    const QEvent::Type eventType = e->type();
+    if (eventType == QEvent::ToolTip)
     {
         showToolTip(static_cast<QHelpEvent *>(e));
         return true;
     }
 
+    if (eventType == QEvent::PaletteChange)
+    {
+        updateColors();
+        redraw();
+    }
+
     return base::event(e);
 }
 

src/gui/rss/rsswidget.cpp

@@ -126,6 +126,8 @@ RSSWidget::RSSWidget(IGUIApplication *app, QWidget *parent)
             , this, &RSSWidget::handleSessionProcessingStateChanged);
     connect(RSS::Session::instance()->rootFolder(), &RSS::Folder::unreadCountChanged
             , this, &RSSWidget::handleUnreadCountChanged);
+
+    m_ui->textBrowser->installEventFilter(this);
 }
 
 RSSWidget::~RSSWidget()
@@ -494,60 +496,11 @@ void RSSWidget::handleCurrentArticleItemChanged(QListWidgetItem *currentItem, QL
         article->markAsRead();
     }
 
-    if (!currentItem) return;
+    if (!currentItem)
+        return;
 
     auto *article = m_articleListWidget->getRSSArticle(currentItem);
-    Q_ASSERT(article);
-
-    const QString highlightedBaseColor = m_ui->textBrowser->palette().color(QPalette::Highlight).name();
-    const QString highlightedBaseTextColor = m_ui->textBrowser->palette().color(QPalette::HighlightedText).name();
-    const QString alternateBaseColor = m_ui->textBrowser->palette().color(QPalette::AlternateBase).name();
-
-    QString html =
-        u"<div style='border: 2px solid red; margin-left: 5px; margin-right: 5px; margin-bottom: 5px;'>" +
-        u"<div style='background-color: \"%1\"; font-weight: bold; color: \"%2\";'>%3</div>"_s.arg(highlightedBaseColor, highlightedBaseTextColor, article->title());
-    if (article->date().isValid())
-        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Date: "), QLocale::system().toString(article->date().toLocalTime()));
-    if (m_feedListWidget->currentItem() == m_feedListWidget->stickyUnreadItem())
-        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Feed: "), article->feed()->title());
-    if (!article->author().isEmpty())
-        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Author: "), article->author());
-    html += u"</div>"
-            u"<div style='margin-left: 5px; margin-right: 5px;'>";
-    if (Qt::mightBeRichText(article->description()))
-    {
-        html += article->description();
-    }
-    else
-    {
-        QString description = article->description();
-        QRegularExpression rx;
-        // If description is plain text, replace BBCode tags with HTML and wrap everything in <pre></pre> so it looks nice
-        rx.setPatternOptions(QRegularExpression::InvertedGreedinessOption
-            | QRegularExpression::CaseInsensitiveOption);
-
-        rx.setPattern(u"\\[img\\](.+)\\[/img\\]"_s);
-        description = description.replace(rx, u"<img src=\"\\1\">"_s);
-
-        rx.setPattern(u"\\[url=(\")?(.+)\\1\\]"_s);
-        description = description.replace(rx, u"<a href=\"\\2\">"_s);
-        description = description.replace(u"[/url]"_s, u"</a>"_s, Qt::CaseInsensitive);
-
-        rx.setPattern(u"\\[(/)?([bius])\\]"_s);
-        description = description.replace(rx, u"<\\1\\2>"_s);
-
-        rx.setPattern(u"\\[color=(\")?(.+)\\1\\]"_s);
-        description = description.replace(rx, u"<span style=\"color:\\2\">"_s);
-        description = description.replace(u"[/color]"_s, u"</span>"_s, Qt::CaseInsensitive);
-
-        rx.setPattern(u"\\[size=(\")?(.+)\\d\\1\\]"_s);
-        description = description.replace(rx, u"<span style=\"font-size:\\2px\">"_s);
-        description = description.replace(u"[/size]"_s, u"</span>"_s, Qt::CaseInsensitive);
-
-        html += u"<pre>" + description + u"</pre>";
-    }
-    html += u"</div>";
-    m_ui->textBrowser->setHtml(html);
+    renderArticle(article);
 }
 
 void RSSWidget::saveSlidersPosition()
@@ -590,3 +543,73 @@ void RSSWidget::handleUnreadCountChanged()
 {
     emit unreadCountUpdated(RSS::Session::instance()->rootFolder()->unreadCount());
 }
+
+bool RSSWidget::eventFilter(QObject *obj, QEvent *event)
+{
+    if ((obj == m_ui->textBrowser) && (event->type() == QEvent::PaletteChange))
+    {
+        QListWidgetItem *currentItem = m_articleListWidget->currentItem();
+        if (currentItem)
+        {
+            const RSS::Article *article = m_articleListWidget->getRSSArticle(currentItem);
+            renderArticle(article);
+        }
+    }
+
+    return false;
+}
+
+void RSSWidget::renderArticle(const RSS::Article *article) const
+{
+    Q_ASSERT(article);
+
+    const QString highlightedBaseColor = m_ui->textBrowser->palette().color(QPalette::Active, QPalette::Highlight).name();
+    const QString highlightedBaseTextColor = m_ui->textBrowser->palette().color(QPalette::Active, QPalette::HighlightedText).name();
+    const QString alternateBaseColor = m_ui->textBrowser->palette().color(QPalette::Active, QPalette::AlternateBase).name();
+
+    QString html =
+        u"<div style='border: 2px solid red; margin-left: 5px; margin-right: 5px; margin-bottom: 5px;'>" +
+        u"<div style='background-color: \"%1\"; font-weight: bold; color: \"%2\";'>%3</div>"_s.arg(highlightedBaseColor, highlightedBaseTextColor, article->title());
+    if (article->date().isValid())
+        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Date: "), QLocale::system().toString(article->date().toLocalTime()));
+    if (m_feedListWidget->currentItem() == m_feedListWidget->stickyUnreadItem())
+        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Feed: "), article->feed()->title());
+    if (!article->author().isEmpty())
+        html += u"<div style='background-color: \"%1\";'><b>%2</b>%3</div>"_s.arg(alternateBaseColor, tr("Author: "), article->author());
+    html += u"</div>"
+            u"<div style='margin-left: 5px; margin-right: 5px;'>";
+    if (Qt::mightBeRichText(article->description()))
+    {
+        html += article->description();
+    }
+    else
+    {
+        QString description = article->description();
+        QRegularExpression rx;
+        // If description is plain text, replace BBCode tags with HTML and wrap everything in <pre></pre> so it looks nice
+        rx.setPatternOptions(QRegularExpression::InvertedGreedinessOption
+                             | QRegularExpression::CaseInsensitiveOption);
+
+        rx.setPattern(u"\\[img\\](.+)\\[/img\\]"_s);
+        description = description.replace(rx, u"<img src=\"\\1\">"_s);
+
+        rx.setPattern(u"\\[url=(\")?(.+)\\1\\]"_s);
+        description = description.replace(rx, u"<a href=\"\\2\">"_s);
+        description = description.replace(u"[/url]"_s, u"</a>"_s, Qt::CaseInsensitive);
+
+        rx.setPattern(u"\\[(/)?([bius])\\]"_s);
+        description = description.replace(rx, u"<\\1\\2>"_s);
+
+        rx.setPattern(u"\\[color=(\")?(.+)\\1\\]"_s);
+        description = description.replace(rx, u"<span style=\"color:\\2\">"_s);
+        description = description.replace(u"[/color]"_s, u"</span>"_s, Qt::CaseInsensitive);
+
+        rx.setPattern(u"\\[size=(\")?(.+)\\d\\1\\]"_s);
+        description = description.replace(rx, u"<span style=\"font-size:\\2px\">"_s);
+        description = description.replace(u"[/size]"_s, u"</span>"_s, Qt::CaseInsensitive);
+
+        html += u"<pre>" + description + u"</pre>";
+    }
+    html += u"</div>";
+    m_ui->textBrowser->setHtml(html);
+}

src/gui/rss/rsswidget.h

@@ -40,6 +40,11 @@ class QTreeWidgetItem;
 class ArticleListWidget;
 class FeedListWidget;
 
+namespace RSS
+{
+    class Article;
+}
+
 namespace Ui
 {
     class RSSWidget;
@@ -85,6 +90,9 @@ private slots:
     void handleUnreadCountChanged();
 
 private:
+    bool eventFilter(QObject *obj, QEvent *event) override;
+    void renderArticle(const RSS::Article *article) const;
+
     Ui::RSSWidget *m_ui = nullptr;
     ArticleListWidget *m_articleListWidget = nullptr;
     FeedListWidget *m_feedListWidget = nullptr;

src/gui/torrentcreatordialog.cpp

@@ -84,11 +84,7 @@ TorrentCreatorDialog::TorrentCreatorDialog(QWidget *parent, const Path &defaultP
     m_ui->setupUi(this);
 
     m_ui->comboPieceSize->addItem(tr("Auto"), 0);
-#ifdef QBT_USES_LIBTORRENT2
-    for (int i = 4; i <= 18; ++i)
-#else
     for (int i = 4; i <= 17; ++i)
-#endif
     {
         const int size = 1024 << i;
         const QString displaySize = Utils::Misc::friendlyUnit(size, false, 0);

src/gui/uithememanager.cpp

@@ -80,6 +80,14 @@ UIThemeManager::UIThemeManager()
     , m_useSystemIcons {Preferences::instance()->useSystemIcons()}
 #endif
 {
+#ifdef Q_OS_WIN
+    if (const QString styleName = Preferences::instance()->getStyle(); styleName.compare(u"system", Qt::CaseInsensitive) != 0)
+    {
+        if (!QApplication::setStyle(styleName.isEmpty() ? u"Fusion"_s : styleName))
+            LogMsg(tr("Set app style failed. Unknown style: \"%1\"").arg(styleName), Log::WARNING);
+    }
+#endif
+
     // NOTE: Qt::QueuedConnection can be omitted as soon as support for Qt 6.5 is dropped
     connect(QApplication::styleHints(), &QStyleHints::colorSchemeChanged, this, &UIThemeManager::onColorSchemeChanged, Qt::QueuedConnection);