Always use nullptr for zero pointer

Signed-off-by: Juraj Oravec <jurajoravec@mailo.com>

src/lib/3rdparty/lineedit.cpp

@@ -57,8 +57,8 @@ bool SideWidget::event(QEvent* event)
 
 LineEdit::LineEdit(QWidget* parent)
     : QLineEdit(parent)
-    , m_leftLayout(0)
+    , m_leftLayout(nullptr)
-    , m_rightLayout(0)
+    , m_rightLayout(nullptr)
     , m_minHeight(0)
     , m_leftMargin(-1)
     , m_ignoreMousePress(false)
@@ -219,7 +219,7 @@ QMenu* LineEdit::createContextMenu()
     QMenu* tmp = createStandardContextMenu();
     tmp->setParent(popup);
     tmp->hide();
-    QAction* lastAction = !tmp->actions().isEmpty() ? tmp->actions().constLast() : 0;
+    QAction* lastAction = !tmp->actions().isEmpty() ? tmp->actions().constLast() : nullptr;
 
     if (lastAction && lastAction->menu() && lastAction->menu()->inherits("QUnicodeControlCharacterMenu")) {
         popup->addAction(lastAction);

src/lib/3rdparty/qtsingleapplication/qtlocalpeer.h

@@ -52,7 +52,7 @@ class QtLocalPeer : public QObject
     Q_OBJECT
 
 public:
-    QtLocalPeer(QObject *parent = 0, const QString &appId = QString());
+    QtLocalPeer(QObject *parent = nullptr, const QString &appId = QString());
     bool isClient();
     bool sendMessage(const QString &message, int timeout);
     QString applicationId() const

src/lib/3rdparty/qtsingleapplication/qtsingleapplication.cpp

@@ -135,7 +135,7 @@
 
 void QtSingleApplication::sysInit(const QString &appId)
 {
-    actWin = 0;
+    actWin = nullptr;
     peer = new QtLocalPeer(this, appId);
     connect(peer, &QtLocalPeer::messageReceived, this, &QtSingleApplication::messageReceived);
 }

src/lib/adblock/adblockmatcher.cpp

@@ -35,13 +35,13 @@ const AdBlockRule* AdBlockMatcher::match(const QWebEngineUrlRequestInfo &request
 {
     // Exception rules
     if (m_networkExceptionTree.find(request, urlDomain, urlString))
-        return 0;
+        return nullptr;
 
     int count = m_networkExceptionRules.count();
     for (int i = 0; i < count; ++i) {
         const AdBlockRule* rule = m_networkExceptionRules.at(i);
         if (rule->networkMatch(request, urlDomain, urlString))
-            return 0;
+            return nullptr;
     }
 
     // Block rules
@@ -55,7 +55,7 @@ const AdBlockRule* AdBlockMatcher::match(const QWebEngineUrlRequestInfo &request
             return rule;
     }
 
-    return 0;
+    return nullptr;
 }
 
 bool AdBlockMatcher::adBlockDisabledForUrl(const QUrl &url) const

src/lib/adblock/adblocksearchtree.cpp

@@ -73,7 +73,7 @@ const AdBlockRule* AdBlockSearchTree::find(const QWebEngineUrlRequestInfo &reque
     int len = urlString.size();
 
     if (len <= 0) {
-        return 0;
+        return nullptr;
     }
 
     const QChar* string = urlString.constData();
@@ -85,13 +85,13 @@ const AdBlockRule* AdBlockSearchTree::find(const QWebEngineUrlRequestInfo &reque
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 const AdBlockRule* AdBlockSearchTree::prefixSearch(const QWebEngineUrlRequestInfo &request, const QString &domain, const QString &urlString, const QChar* string, int len) const
 {
     if (len <= 0) {
-        return 0;
+        return nullptr;
     }
 
     QChar c = string[0];

src/lib/adblock/adblocksearchtree.h

@@ -44,7 +44,7 @@ private:
         const AdBlockRule* rule;
         QHash<QChar, Node*> children;
 
-        Node() : c(0) , rule(0) { }
+        Node() : c(0) , rule(nullptr) { }
     };
 
     const AdBlockRule* prefixSearch(const QWebEngineUrlRequestInfo &request, const QString &domain,

src/lib/adblock/adblocksubscription.cpp

@@ -167,7 +167,7 @@ void AdBlockSubscription::subscriptionDownloaded()
     }
 
     m_reply->deleteLater();
-    m_reply = 0;
+    m_reply = nullptr;
 
     if (error) {
         Q_EMIT subscriptionError(tr("Cannot load subscription!"));
@@ -412,7 +412,7 @@ bool AdBlockCustomList::removeRule(int offset)
 const AdBlockRule* AdBlockCustomList::replaceRule(AdBlockRule* rule, int offset)
 {
     if (!QzTools::containsIndex(m_rules, offset)) {
-        return 0;
+        return nullptr;
     }
 
     AdBlockRule* oldRule = m_rules.at(offset);

src/lib/adblock/adblocktreewidget.cpp

@@ -27,7 +27,7 @@
 AdBlockTreeWidget::AdBlockTreeWidget(AdBlockSubscription* subscription, QWidget* parent)
     : TreeWidget(parent)
     , m_subscription(subscription)
-    , m_topItem(0)
+    , m_topItem(nullptr)
     , m_itemChangingBlock(false)
 {
     setContextMenuPolicy(Qt::CustomContextMenu);
@@ -266,6 +266,6 @@ void AdBlockTreeWidget::refresh()
         ++index;
     }
 
-    showRule(0);
+    showRule(nullptr);
     m_itemChangingBlock = false;
 }

src/lib/app/browserwindow.cpp

@@ -1565,7 +1565,7 @@ static xcb_connection_t *getXcbConnection()
 {
     const QNativeInterface::QX11Application *x11App = qApp->nativeInterface<QNativeInterface::QX11Application>();
     if (x11App == nullptr)
-        return 0;
+        return nullptr;
     return x11App->connection();
 }
 
@@ -1575,18 +1575,18 @@ int BrowserWindow::getCurrentVirtualDesktop() const
         return 0;
 
     xcb_connection_t *connection = getXcbConnection();
-    if (connection == 0)
+    if (connection == nullptr)
         return 0;
 
     xcb_intern_atom_cookie_t intern_atom;
-    xcb_intern_atom_reply_t *atom_reply = 0;
+    xcb_intern_atom_reply_t *atom_reply = nullptr;
     xcb_atom_t atom;
     xcb_get_property_cookie_t cookie;
-    xcb_get_property_reply_t *reply = 0;
+    xcb_get_property_reply_t *reply = nullptr;
     uint32_t value;
 
     intern_atom = xcb_intern_atom(connection, false, qstrlen("_NET_WM_DESKTOP"), "_NET_WM_DESKTOP");
-    atom_reply = xcb_intern_atom_reply(connection, intern_atom, 0);
+    atom_reply = xcb_intern_atom_reply(connection, intern_atom, nullptr);
 
     if (!atom_reply)
         goto error;
@@ -1594,7 +1594,7 @@ int BrowserWindow::getCurrentVirtualDesktop() const
     atom = atom_reply->atom;
 
     cookie = xcb_get_property(connection, false, winId(), atom, XCB_ATOM_CARDINAL, 0, 1);
-    reply = xcb_get_property_reply(connection, cookie, 0);
+    reply = xcb_get_property_reply(connection, cookie, nullptr);
 
     if (!reply || reply->type != XCB_ATOM_CARDINAL || reply->value_len != 1 || reply->format != sizeof(uint32_t) * 8)
         goto error;
@@ -1621,15 +1621,15 @@ void BrowserWindow::moveToVirtualDesktop(int desktopId)
         return;
 
     xcb_connection_t *connection = getXcbConnection();
-    if (connection == 0)
+    if (connection == nullptr)
         return;
 
     xcb_intern_atom_cookie_t intern_atom;
-    xcb_intern_atom_reply_t *atom_reply = 0;
+    xcb_intern_atom_reply_t *atom_reply = nullptr;
     xcb_atom_t atom;
 
     intern_atom = xcb_intern_atom(connection, false, qstrlen("_NET_WM_DESKTOP"), "_NET_WM_DESKTOP");
-    atom_reply = xcb_intern_atom_reply(connection, intern_atom, 0);
+    atom_reply = xcb_intern_atom_reply(connection, intern_atom, nullptr);
 
     if (!atom_reply)
         goto error;

src/lib/app/browserwindow.h

@@ -155,8 +155,8 @@ public Q_SLOTS:
     void toggleFullScreen();
     void requestHtmlFullScreen(TabbedWebView *view, bool enable);
 
-    void loadActionUrl(QObject* obj = 0);
+    void loadActionUrl(QObject* obj = nullptr);
-    void loadActionUrlInNewTab(QObject* obj = 0);
+    void loadActionUrlInNewTab(QObject* obj = nullptr);
 
     void bookmarkPage();
     void bookmarkAllTabs();

src/lib/app/mainapplication.cpp

@@ -448,7 +448,7 @@ BrowserWindow* MainApplication::getWindow() const
         return m_lastActiveWindow.data();
     }
 
-    return m_windows.isEmpty() ? 0 : m_windows.at(0);
+    return m_windows.isEmpty() ? nullptr : m_windows.at(0);
 }
 
 BrowserWindow* MainApplication::createWindow(Qz::BrowserWindowType type, const QUrl &startUrl)
@@ -516,7 +516,7 @@ void MainApplication::destroyRestoreManager()
     }
 
     delete m_restoreManager;
-    m_restoreManager = 0;
+    m_restoreManager = nullptr;
 }
 
 void MainApplication::reloadSettings()

src/lib/app/profilemanager.cpp

@@ -249,7 +249,7 @@ void ProfileManager::copyDataToProfile()
 
         const QString text = QSL("Incompatible profile version has been detected. To avoid losing your profile data, they were "
                              "backed up in following file:<br/><br/><b>") + browseDataBackup + QSL("<br/></b>");
-        QMessageBox::warning(0, QStringLiteral("Falkon: Incompatible profile version"), text);
+        QMessageBox::warning(nullptr, QStringLiteral("Falkon: Incompatible profile version"), text);
     }
 }
 

src/lib/app/proxystyle.h

@@ -27,7 +27,7 @@ class FALKON_EXPORT ProxyStyle : public QProxyStyle
 public:
     explicit ProxyStyle();
 
-    int styleHint(StyleHint hint, const QStyleOption* option = 0, const QWidget* widget = 0, QStyleHintReturn* returnData = 0) const override;
+    int styleHint(StyleHint hint, const QStyleOption* option = nullptr, const QWidget* widget = nullptr, QStyleHintReturn* returnData = nullptr) const override;
     int pixelMetric(PixelMetric metric, const QStyleOption* option, const QWidget* widget) const override;
     void drawPrimitive(PrimitiveElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget = nullptr) const override;
 

src/lib/app/settings.cpp

@@ -20,8 +20,8 @@
 
 #include <QSettings>
 
-QSettings* Settings::s_settings = 0;
+QSettings* Settings::s_settings = nullptr;
-QzSettings* Settings::s_qzSettings = 0;
+QzSettings* Settings::s_qzSettings = nullptr;
 
 Settings::Settings()
 {

src/lib/autofill/autofillnotification.cpp

@@ -21,7 +21,7 @@
 #include "iconprovider.h"
 
 AutoFillNotification::AutoFillNotification(const QUrl &url, const PageFormData &formData, const PasswordEntry &updateData)
-    : AnimatedWidget(AnimatedWidget::Down, 300, 0)
+    : AnimatedWidget(AnimatedWidget::Down, 300, nullptr)
     , ui(new Ui::AutoFillNotification)
     , m_url(url)
     , m_formData(formData)

src/lib/bookmarks/bookmarksexport/bookmarksexportdialog.cpp

@@ -26,7 +26,7 @@
 BookmarksExportDialog::BookmarksExportDialog(QWidget* parent)
     : QDialog(parent)
     , ui(new Ui::BookmarksExportDialog)
-    , m_currentExporter(0)
+    , m_currentExporter(nullptr)
 {
     setAttribute(Qt::WA_DeleteOnClose);
     ui->setupUi(this);

src/lib/bookmarks/bookmarksicon.cpp

@@ -29,8 +29,8 @@
 
 BookmarksIcon::BookmarksIcon(QWidget* parent)
     : ClickableLabel(parent)
-    , m_view(0)
+    , m_view(nullptr)
-    , m_bookmark(0)
+    , m_bookmark(nullptr)
 {
     setObjectName("locationbar-bookmarkicon");
     setCursor(Qt::PointingHandCursor);
@@ -60,7 +60,7 @@ void BookmarksIcon::checkBookmark(const QUrl &url, bool forceCheck)
     }
 
     QList<BookmarkItem*> items = mApp->bookmarks()->searchBookmarks(url);
-    m_bookmark = items.isEmpty() ? 0 : items.at(0);
+    m_bookmark = items.isEmpty() ? nullptr : items.at(0);
 
     if (m_bookmark || mApp->plugins()->speedDial()->pageForUrl(url).isValid()) {
         setBookmarkSaved();

src/lib/bookmarks/bookmarksimport/operaimporter.cpp

@@ -81,7 +81,7 @@ BookmarkItem* OperaImporter::importBookmarks()
     QList<BookmarkItem*> folders;
     folders.append(root);
 
-    BookmarkItem* item = 0;
+    BookmarkItem* item = nullptr;
 
 #define PARENT folders.isEmpty() ? root : folders.last()
 

src/lib/bookmarks/bookmarksmanager.h

@@ -55,10 +55,10 @@ private Q_SLOTS:
     void bookmarksSelected(const QList<BookmarkItem*> &items);
     void createContextMenu(const QPoint &pos);
 
-    void openBookmark(BookmarkItem* item = 0);
+    void openBookmark(BookmarkItem* item = nullptr);
-    void openBookmarkInNewTab(BookmarkItem* item = 0);
+    void openBookmarkInNewTab(BookmarkItem* item = nullptr);
-    void openBookmarkInNewWindow(BookmarkItem* item = 0);
+    void openBookmarkInNewWindow(BookmarkItem* item = nullptr);
-    void openBookmarkInNewPrivateWindow(BookmarkItem* item = 0);
+    void openBookmarkInNewPrivateWindow(BookmarkItem* item = nullptr);
 
     void addBookmark();
     void addFolder();

src/lib/bookmarks/bookmarksmenu.cpp

@@ -28,7 +28,7 @@
 
 BookmarksMenu::BookmarksMenu(QWidget* parent)
     : Menu(parent)
-    , m_window(0)
+    , m_window(nullptr)
     , m_changed(true)
 {
     init();

src/lib/bookmarks/bookmarkstoolbar.cpp

@@ -36,7 +36,7 @@ BookmarksToolbar::BookmarksToolbar(BrowserWindow* window, QWidget* parent)
     : QWidget(parent)
     , m_window(window)
     , m_bookmarks(mApp->bookmarks())
-    , m_clickedBookmark(0)
+    , m_clickedBookmark(nullptr)
     , m_dropRow(-1)
 {
     setObjectName("bookmarksbar");
@@ -44,10 +44,10 @@ BookmarksToolbar::BookmarksToolbar(BrowserWindow* window, QWidget* parent)
     setContextMenuPolicy(Qt::CustomContextMenu);
 
     m_layout = new QHBoxLayout(this);
-    auto contentsMargin = style()->pixelMetric(QStyle::PM_ToolBarItemMargin, 0, this)
+    auto contentsMargin = style()->pixelMetric(QStyle::PM_ToolBarItemMargin, nullptr, this)
-                        + style()->pixelMetric(QStyle::PM_ToolBarFrameWidth, 0, this);
+                        + style()->pixelMetric(QStyle::PM_ToolBarFrameWidth, nullptr, this);
     m_layout->setContentsMargins(contentsMargin, contentsMargin, contentsMargin, contentsMargin);
-    m_layout->setSpacing(style()->pixelMetric(QStyle::PM_ToolBarItemSpacing, 0, this));
+    m_layout->setSpacing(style()->pixelMetric(QStyle::PM_ToolBarItemSpacing, nullptr, this));
     setLayout(m_layout);
 
     m_updateTimer = new QTimer(this);
@@ -68,7 +68,7 @@ BookmarksToolbar::BookmarksToolbar(BrowserWindow* window, QWidget* parent)
 void BookmarksToolbar::contextMenuRequested(const QPoint &pos)
 {
     BookmarksToolbarButton* button = buttonAt(pos);
-    m_clickedBookmark = button ? button->bookmark() : 0;
+    m_clickedBookmark = button ? button->bookmark() : nullptr;
 
     QMenu menu;
     QAction* actNewTab = menu.addAction(IconProvider::newTabIcon(), tr("Open in new tab"));

src/lib/bookmarks/bookmarkstoolbarbutton.cpp

@@ -38,7 +38,7 @@
 BookmarksToolbarButton::BookmarksToolbarButton(BookmarkItem* bookmark, QWidget* parent)
     : QPushButton(parent)
     , m_bookmark(bookmark)
-    , m_window(0)
+    , m_window(nullptr)
     , m_showOnlyIcon(false)
 {
     init();

src/lib/bookmarks/bookmarkstoolbarbutton.h

@@ -50,9 +50,9 @@ private Q_SLOTS:
 
     void menuAboutToShow();
     void menuMiddleClicked(Menu* menu);
-    void bookmarkActivated(BookmarkItem* item = 0);
+    void bookmarkActivated(BookmarkItem* item = nullptr);
-    void bookmarkCtrlActivated(BookmarkItem* item = 0);
+    void bookmarkCtrlActivated(BookmarkItem* item = nullptr);
-    void bookmarkShiftActivated(BookmarkItem* item = 0);
+    void bookmarkShiftActivated(BookmarkItem* item = nullptr);
 
     void openFolder(BookmarkItem* item);
     void openBookmark(BookmarkItem* item);

src/lib/bookmarks/bookmarkstools.cpp

@@ -40,7 +40,7 @@
 // BookmarksFoldersMenu
 BookmarksFoldersMenu::BookmarksFoldersMenu(QWidget* parent)
     : QMenu(parent)
-    , m_selectedFolder(0)
+    , m_selectedFolder(nullptr)
 {
     init();
 }

src/lib/bookmarks/bookmarkstools.h

@@ -53,7 +53,7 @@ class FALKON_EXPORT BookmarksFoldersButton : public QPushButton
     Q_OBJECT
 
 public:
-    explicit BookmarksFoldersButton(QWidget* parent, BookmarkItem* folder = 0);
+    explicit BookmarksFoldersButton(QWidget* parent, BookmarkItem* folder = nullptr);
 
     BookmarkItem* selectedFolder() const;
 
@@ -79,8 +79,8 @@ class FALKON_EXPORT BookmarksTools
 {
 public:
     // Add Bookmark Dialogs
-    static bool addBookmarkDialog(QWidget* parent, const QUrl &url, const QString &title, BookmarkItem* folder = 0);
+    static bool addBookmarkDialog(QWidget* parent, const QUrl &url, const QString &title, BookmarkItem* folder = nullptr);
-    static bool bookmarkAllTabsDialog(QWidget* parent, TabWidget* tabWidget, BookmarkItem* folder = 0);
+    static bool bookmarkAllTabsDialog(QWidget* parent, TabWidget* tabWidget, BookmarkItem* folder = nullptr);
 
     // Edit Bookmark Dialog
     static bool editBookmarkDialog(QWidget* parent, BookmarkItem* item);

src/lib/bookmarks/bookmarkstreeview.cpp

@@ -78,7 +78,7 @@ void BookmarksTreeView::setViewType(BookmarksTreeView::ViewType type)
 BookmarkItem* BookmarksTreeView::selectedBookmark() const
 {
     QList<BookmarkItem*> items = selectedBookmarks();
-    return items.count() == 1 ? items.at(0) : 0;
+    return items.count() == 1 ? items.at(0) : nullptr;
 }
 
 QList<BookmarkItem*> BookmarksTreeView::selectedBookmarks() const

src/lib/history/history.cpp

@@ -29,7 +29,7 @@
 History::History(QObject* parent)
     : QObject(parent)
     , m_isSaving(true)
-    , m_model(0)
+    , m_model(nullptr)
 {
     loadSettings();
 }

src/lib/history/historyitem.cpp

@@ -97,7 +97,7 @@ HistoryItem* HistoryItem::child(int row) const
         return m_children.at(row);
     }
 
-    return 0;
+    return nullptr;
 }
 
 int HistoryItem::childCount() const

src/lib/history/historymenu.cpp

@@ -73,7 +73,7 @@ void HistoryMenu::showHistoryManager()
 void HistoryMenu::aboutToShow()
 {
     // Set enabled states for Back/Forward actions according to current WebView
-    TabbedWebView* view = m_window ? m_window->weView() : 0;
+    TabbedWebView* view = m_window ? m_window->weView() : nullptr;
 
     if (view) {
         actions().at(0)->setEnabled(view->history()->canGoBack());

src/lib/history/historymodel.cpp

@@ -37,8 +37,8 @@ static QString dateTimeToString(const QDateTime &dateTime)
 
 HistoryModel::HistoryModel(History* history)
     : QAbstractItemModel(history)
-    , m_rootItem(new HistoryItem(0))
+    , m_rootItem(new HistoryItem(nullptr))
-    , m_todayItem(0)
+    , m_todayItem(nullptr)
     , m_history(history)
 {
     init();
@@ -254,7 +254,7 @@ void HistoryModel::removeTopLevelIndexes(const QList<QPersistentModelIndex> &ind
         endRemoveRows();
 
         if (item == m_todayItem) {
-            m_todayItem = 0;
+            m_todayItem = nullptr;
         }
     }
 }
@@ -264,8 +264,8 @@ void HistoryModel::resetHistory()
     beginResetModel();
 
     delete m_rootItem;
-    m_todayItem = 0;
+    m_todayItem = nullptr;
-    m_rootItem = new HistoryItem(0);
+    m_rootItem = new HistoryItem(nullptr);
 
     init();
 
@@ -335,7 +335,7 @@ void HistoryModel::historyEntryAdded(const HistoryEntry &entry)
     if (!m_todayItem) {
         beginInsertRows(QModelIndex(), 0, 0);
 
-        m_todayItem = new HistoryItem(0);
+        m_todayItem = new HistoryItem(nullptr);
         m_todayItem->setStartTimestamp(-1);
         m_todayItem->setEndTimestamp(QDateTime(QDate::currentDate(), QTime(), QTimeZone::systemTimeZone()).toMSecsSinceEpoch());
         m_todayItem->title = tr("Today");
@@ -401,7 +401,7 @@ void HistoryModel::historyEntryEdited(const HistoryEntry &before, const HistoryE
 
 HistoryItem* HistoryModel::findHistoryItem(const HistoryEntry &entry)
 {
-    HistoryItem* parentItem = 0;
+    HistoryItem* parentItem = nullptr;
     qint64 timestamp = entry.date.toMSecsSinceEpoch();
 
     for (int i = 0; i < m_rootItem->childCount(); ++i) {
@@ -414,7 +414,7 @@ HistoryItem* HistoryModel::findHistoryItem(const HistoryEntry &entry)
     }
 
     if (!parentItem) {
-        return 0;
+        return nullptr;
     }
 
     for (int i = 0; i < parentItem->childCount(); ++i) {
@@ -424,7 +424,7 @@ HistoryItem* HistoryModel::findHistoryItem(const HistoryEntry &entry)
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 void HistoryModel::checkEmptyParentItem(HistoryItem* item)
@@ -437,7 +437,7 @@ void HistoryModel::checkEmptyParentItem(HistoryItem* item)
         endRemoveRows();
 
         if (item == m_todayItem) {
-            m_todayItem = 0;
+            m_todayItem = nullptr;
         }
     }
 }

src/lib/navigation/completer/locationcompleter.cpp

@@ -34,13 +34,13 @@
 
 #include <QWindow>
 
-LocationCompleterView* LocationCompleter::s_view = 0;
+LocationCompleterView* LocationCompleter::s_view = nullptr;
-LocationCompleterModel* LocationCompleter::s_model = 0;
+LocationCompleterModel* LocationCompleter::s_model = nullptr;
 
 LocationCompleter::LocationCompleter(QObject* parent)
     : QObject(parent)
-    , m_window(0)
+    , m_window(nullptr)
-    , m_locationBar(0)
+    , m_locationBar(nullptr)
     , m_lastRefreshTimestamp(0)
     , m_popupClosed(false)
 {

src/lib/navigation/completer/locationcompleterdelegate.cpp

@@ -219,7 +219,7 @@ QSize LocationCompleterDelegate::sizeHint(const QStyleOptionViewItem &option, co
 
         const QWidget* w = opt.widget;
         const QStyle* style = w ? w->style() : QApplication::style();
-        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, 0) + 1;
+        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr) + 1;
 
         m_padding = padding > 3 ? padding : 3;
         m_rowHeight = 4 * m_padding + qMax(16, opt.fontMetrics.height());

src/lib/navigation/completer/locationcompleterdelegate.h

@@ -26,7 +26,7 @@ class FALKON_EXPORT LocationCompleterDelegate : public QStyledItemDelegate
 {
     Q_OBJECT
 public:
-    explicit LocationCompleterDelegate(QObject *parent = 0);
+    explicit LocationCompleterDelegate(QObject *parent = nullptr);
 
     void paint(QPainter* painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override;
     QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override;

src/lib/navigation/locationbar.cpp

@@ -46,7 +46,7 @@
 LocationBar::LocationBar(QWidget *parent)
     : LineEdit(parent)
     , m_window(nullptr)
-    , m_webView(0)
+    , m_webView(nullptr)
     , m_holdingAlt(false)
     , m_oldTextLength(0)
     , m_currentTextLength(0)

src/lib/navigation/navigationbar.cpp

@@ -66,10 +66,10 @@ NavigationBar::NavigationBar(BrowserWindow* window)
     setObjectName(QSL("navigationbar"));
 
     m_layout = new QHBoxLayout(this);
-    auto contentsMargin = style()->pixelMetric(QStyle::PM_ToolBarItemMargin, 0, this)
+    auto contentsMargin = style()->pixelMetric(QStyle::PM_ToolBarItemMargin, nullptr, this)
-                        + style()->pixelMetric(QStyle::PM_ToolBarFrameWidth, 0, this);
+                        + style()->pixelMetric(QStyle::PM_ToolBarFrameWidth, nullptr, this);
     m_layout->setContentsMargins(contentsMargin, contentsMargin, contentsMargin, contentsMargin);
-    m_layout->setSpacing(style()->pixelMetric(QStyle::PM_ToolBarItemSpacing, 0, this));
+    m_layout->setSpacing(style()->pixelMetric(QStyle::PM_ToolBarItemSpacing, nullptr, this));
     setLayout(m_layout);
 
     m_buttonBack = new ToolButton(this);

src/lib/navigation/navigationcontainer.cpp

@@ -24,7 +24,7 @@
 
 NavigationContainer::NavigationContainer(QWidget* parent)
     : QWidget(parent)
-    , m_tabBar(0)
+    , m_tabBar(nullptr)
 {
     m_layout = new QVBoxLayout(this);
     m_layout->setContentsMargins(0, 0, 0, 0);

src/lib/navigation/siteicon.cpp

@@ -32,7 +32,7 @@ SiteIcon::SiteIcon(LocationBar *parent)
     : ToolButton(parent)
     , m_window(nullptr)
     , m_locationBar(parent)
-    , m_view(0)
+    , m_view(nullptr)
 {
     setObjectName("locationbar-siteicon");
     setToolButtonStyle(Qt::ToolButtonIconOnly);

src/lib/notifications/desktopnotification.cpp

@@ -22,7 +22,7 @@
 #include <QMouseEvent>
 
 DesktopNotification::DesktopNotification(bool setPosition)
-    : QWidget(0)
+    : QWidget(nullptr)
     , ui(new Ui::DesktopNotification)
     , m_settingPosition(setPosition)
     , m_timeout(6000)

src/lib/opensearch/opensearchengine.cpp

@@ -103,9 +103,9 @@ OpenSearchEngine::OpenSearchEngine(QObject* parent)
     : QObject(parent)
     , m_searchMethod(QLatin1String("get"))
     , m_suggestionsMethod(QLatin1String("get"))
-    , m_networkAccessManager(0)
+    , m_networkAccessManager(nullptr)
-    , m_suggestionsReply(0)
+    , m_suggestionsReply(nullptr)
-    , m_delegate(0)
+    , m_delegate(nullptr)
 {
     m_requestMethods.insert(QLatin1String("get"), QNetworkAccessManager::GetOperation);
     m_requestMethods.insert(QLatin1String("post"), QNetworkAccessManager::PostOperation);
@@ -563,7 +563,7 @@ void OpenSearchEngine::requestSuggestions(const QString &searchTerm)
         m_suggestionsReply->disconnect(this);
         m_suggestionsReply->abort();
         m_suggestionsReply->deleteLater();
-        m_suggestionsReply = 0;
+        m_suggestionsReply = nullptr;
     }
 
     Q_ASSERT(m_requestMethods.contains(m_suggestionsMethod));
@@ -627,7 +627,7 @@ void OpenSearchEngine::suggestionsObtained()
 
     m_suggestionsReply->close();
     m_suggestionsReply->deleteLater();
-    m_suggestionsReply = 0;
+    m_suggestionsReply = nullptr;
 
     QJsonParseError err;
     QJsonDocument json = QJsonDocument::fromJson(response, &err);

src/lib/opensearch/searchenginesmanager.cpp

@@ -398,7 +398,7 @@ void SearchEnginesManager::replyFinished()
 
     if (checkEngine(engine)) {
         addEngine(engine);
-        QMessageBox::information(0, tr("Search Engine Added"), tr("Search Engine \"%1\" has been successfully added.").arg(engine->name()));
+        QMessageBox::information(nullptr, tr("Search Engine Added"), tr("Search Engine \"%1\" has been successfully added.").arg(engine->name()));
     }
 }
 
@@ -406,7 +406,7 @@ bool SearchEnginesManager::checkEngine(OpenSearchEngine* engine)
 {
     if (!engine->isValid()) {
         QString errorString = tr("Search Engine is not valid!");
-        QMessageBox::warning(0, tr("Error"), tr("Error while adding Search Engine <br><b>Error Message: </b> %1").arg(errorString));
+        QMessageBox::warning(nullptr, tr("Error"), tr("Error while adding Search Engine <br><b>Error Message: </b> %1").arg(errorString));
 
         return false;
     }

src/lib/other/protocolhandlerdialog.h

@@ -29,7 +29,7 @@ class ProtocolHandlerDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit ProtocolHandlerDialog(QWidget *parent = 0);
+    explicit ProtocolHandlerDialog(QWidget *parent = nullptr);
     ~ProtocolHandlerDialog();
 
 private:

src/lib/other/registerqappassociation.h

@@ -29,9 +29,9 @@ class FALKON_EXPORT RegisterQAppAssociation : public QObject
 {
     Q_OBJECT
 public:
-    explicit RegisterQAppAssociation(QObject* parent = 0);
+    explicit RegisterQAppAssociation(QObject* parent = nullptr);
     explicit RegisterQAppAssociation(const QString &appRegisteredName, const QString &appPath,
-                                     const QString &appIcon = QString(), const QString &appDesc = QString(), QObject* parent = 0);
+                                     const QString &appIcon = QString(), const QString &appDesc = QString(), QObject* parent = nullptr);
     ~RegisterQAppAssociation();
 
     enum AssociationType {

src/lib/other/siteinfo.cpp

@@ -41,7 +41,7 @@
 SiteInfo::SiteInfo(WebView *view)
     : QDialog(view)
     , ui(new Ui::SiteInfo)
-    , m_certWidget(0)
+    , m_certWidget(nullptr)
     , m_view(view)
     , m_imageReply(nullptr)
     , m_baseUrl(view->url())

src/lib/plugins/plugininterface.h

@@ -47,7 +47,7 @@ public:
     virtual void unload() = 0;
     virtual bool testPlugin() = 0;
 
-    virtual void showSettings(QWidget* parent = 0) { Q_UNUSED(parent) }
+    virtual void showSettings(QWidget* parent = nullptr) { Q_UNUSED(parent) }
 
     virtual void populateWebViewMenu(QMenu* menu, WebView* view, const WebHitTestResult &r) { Q_UNUSED(menu) Q_UNUSED(view) Q_UNUSED(r) }
     virtual void populateExtensionsMenu(QMenu *menu) { Q_UNUSED(menu) }

src/lib/plugins/speeddial.cpp

@@ -283,7 +283,7 @@ void SpeedDial::removeImageForUrl(const QString &url)
 QStringList SpeedDial::getOpenFileName()
 {
     const QString fileTypes = QSL("%3(*.png *.jpg *.jpeg *.bmp *.gif *.svg *.tiff)").arg(tr("Image files"));
-    const QString image = QzTools::getOpenFileName(QSL("SpeedDial-GetOpenFileName"), 0, tr("Click to select image..."), QDir::homePath(), fileTypes);
+    const QString image = QzTools::getOpenFileName(QSL("SpeedDial-GetOpenFileName"), nullptr, tr("Click to select image..."), QDir::homePath(), fileTypes);
 
     if (image.isEmpty())
         return {};

src/lib/popupwindow/popuplocationbar.cpp

@@ -44,7 +44,7 @@ private:
 
 PopupLocationBar::PopupLocationBar(QWidget* parent)
     : LineEdit(parent)
-    , m_view(0)
+    , m_view(nullptr)
 {
     m_siteIcon = new PopupSiteIcon(this);
     m_siteIcon->setIcon(IconProvider::emptyWebIcon());

src/lib/popupwindow/popupwindow.cpp

@@ -35,7 +35,7 @@
 PopupWindow::PopupWindow(PopupWebView* view)
     : QWidget()
     , m_view(view)
-    , m_search(0)
+    , m_search(nullptr)
 {
     m_layout = new QVBoxLayout(this);
     m_layout->setContentsMargins(0, 0, 0, 0);

src/lib/preferences/autofillmanager.cpp

@@ -131,7 +131,7 @@ void AutoFillManager::changePasswordBackend()
 
     // Switch backends
     if (!item.isEmpty()) {
-        PasswordBackend* backend = 0;
+        PasswordBackend* backend = nullptr;
 
         QHashIterator<QString, PasswordBackend*> i(backends);
         while (i.hasNext()) {

src/lib/preferences/pluginlistdelegate.cpp

@@ -111,7 +111,7 @@ QSize PluginListDelegate::sizeHint(const QStyleOptionViewItem &option, const QMo
 
         const QWidget* w = opt.widget;
         const QStyle* style = w ? w->style() : QApplication::style();
-        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, 0) + 1;
+        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr) + 1;
 
         QFont titleFont = opt.font;
         titleFont.setBold(true);

src/lib/preferences/preferences.cpp

@@ -98,8 +98,8 @@ Preferences::Preferences(BrowserWindow* window)
     : QDialog(window)
     , ui(new Ui::Preferences)
     , m_window(window)
-    , m_autoFillManager(0)
+    , m_autoFillManager(nullptr)
-    , m_pluginsList(0)
+    , m_pluginsList(nullptr)
 {
     setAttribute(Qt::WA_DeleteOnClose);
     ui->setupUi(this);
@@ -225,7 +225,7 @@ Preferences::Preferences(BrowserWindow* window)
     connect(ui->instantBookmarksToolbar, &QAbstractButton::toggled, ui->showBookmarksToolbar, &QWidget::setDisabled);
     connect(ui->showBookmarksToolbar, &QAbstractButton::toggled, ui->instantBookmarksToolbar, &QWidget::setDisabled);
     ui->showNavigationToolbar->setChecked(settings.value(QSL("showNavigationToolbar"), true).toBool());
-    int currentSettingsPage = settings.value(QSL("settingsDialogPage"), 0).toInt(0);
+    int currentSettingsPage = settings.value(QSL("settingsDialogPage"), 0).toInt(nullptr);
     settings.endGroup();
 
     //TABS

src/lib/session/sessionmanagerdialog.h

@@ -31,7 +31,7 @@ class SessionManagerDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit SessionManagerDialog(QWidget *parent = 0);
+    explicit SessionManagerDialog(QWidget *parent = nullptr);
     ~SessionManagerDialog() override;
 
 private:

src/lib/sidebar/bookmarkssidebar.h

@@ -44,10 +44,10 @@ private Q_SLOTS:
     void bookmarkCtrlActivated(BookmarkItem* item);
     void bookmarkShiftActivated(BookmarkItem* item);
 
-    void openBookmark(BookmarkItem* item = 0);
+    void openBookmark(BookmarkItem* item = nullptr);
-    void openBookmarkInNewTab(BookmarkItem* item = 0);
+    void openBookmarkInNewTab(BookmarkItem* item = nullptr);
-    void openBookmarkInNewWindow(BookmarkItem* item = 0);
+    void openBookmarkInNewWindow(BookmarkItem* item = nullptr);
-    void openBookmarkInNewPrivateWindow(BookmarkItem* item = 0);
+    void openBookmarkInNewPrivateWindow(BookmarkItem* item = nullptr);
 
     void deleteBookmarks();
     void createContextMenu(const QPoint &pos);

src/lib/sidebar/sidebarinterface.h

@@ -29,7 +29,7 @@ class BrowserWindow;
 class FALKON_EXPORT SideBarInterface : public QObject
 {
 public:
-    explicit SideBarInterface(QObject* parent = 0) : QObject(parent) { }
+    explicit SideBarInterface(QObject* parent = nullptr) : QObject(parent) { }
 
     virtual QString title() const = 0;
 

src/lib/tabwidget/combotabbar.cpp

@@ -45,8 +45,8 @@ public:
 
 ComboTabBar::ComboTabBar(QWidget* parent)
     : QWidget(parent)
-    , m_mainTabBar(0)
+    , m_mainTabBar(nullptr)
-    , m_pinnedTabBar(0)
+    , m_pinnedTabBar(nullptr)
     , m_mainBarOverFlowed(false)
     , m_lastAppliedOverflow(false)
     , m_usesScrollButtons(false)
@@ -755,7 +755,7 @@ QTabBar::ButtonPosition ComboTabBar::iconButtonPosition() const
 
 QTabBar::ButtonPosition ComboTabBar::closeButtonPosition() const
 {
-    return (QTabBar::ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, 0, m_mainTabBar);
+    return (QTabBar::ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, nullptr, m_mainTabBar);
 }
 
 QSize ComboTabBar::iconButtonSize() const
@@ -768,8 +768,8 @@ QSize ComboTabBar::iconButtonSize() const
 
 QSize ComboTabBar::closeButtonSize() const
 {
-    int width = style()->pixelMetric(QStyle::PM_TabCloseIndicatorWidth, 0, this);
+    int width = style()->pixelMetric(QStyle::PM_TabCloseIndicatorWidth, nullptr, this);
-    int height = style()->pixelMetric(QStyle::PM_TabCloseIndicatorHeight, 0, this);
+    int height = style()->pixelMetric(QStyle::PM_TabCloseIndicatorHeight, nullptr, this);
     return QSize(width, height);
 }
 
@@ -1000,7 +1000,7 @@ void ComboTabBar::setMinimumWidths()
 TabBarHelper::TabBarHelper(bool isPinnedTabBar, ComboTabBar* comboTabBar)
     : QTabBar(comboTabBar)
     , m_comboTabBar(comboTabBar)
-    , m_scrollArea(0)
+    , m_scrollArea(nullptr)
     , m_pressedIndex(-1)
     , m_dragInProgress(false)
     , m_activeTabBar(false)
@@ -1851,7 +1851,7 @@ void CloseButton::paintEvent(QPaintEvent*)
 
     if (auto* tb = qobject_cast<TabBarHelper*>(parent())) {
         int index = tb->currentIndex();
-        auto closeSide = (QTabBar::ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, 0, tb);
+        auto closeSide = (QTabBar::ButtonPosition)style()->styleHint(QStyle::SH_TabBar_CloseButtonPosition, nullptr, tb);
         if (tb->tabButton(index, closeSide) == this && tb->isActiveTabBar()) {
             opt.state |= QStyle::State_Selected;
         }

src/lib/tabwidget/tabbar.cpp

@@ -129,7 +129,7 @@ void TabBar::loadSettings()
     settings.beginGroup(QSL("Browser-Tabs-Settings"));
     m_hideTabBarWithOneTab = settings.value(QSL("hideTabsWithOneTab"), false).toBool();
     bool activateLastTab = settings.value(QSL("ActivateLastTabWhenClosingActual"), false).toBool();
-    m_showCloseOnInactive = settings.value(QSL("showCloseOnInactiveTabs"), 0).toInt(0);
+    m_showCloseOnInactive = settings.value(QSL("showCloseOnInactiveTabs"), 0).toInt(nullptr);
     settings.endGroup();
 
     setSelectionBehaviorOnRemove(activateLastTab ? QTabBar::SelectPreviousTab : QTabBar::SelectRightTab);
@@ -367,7 +367,7 @@ void TabBar::hideCloseButton(int index)
         return;
     }
 
-    setTabButton(index, closeButtonPosition(), 0);
+    setTabButton(index, closeButtonPosition(), nullptr);
     button->deleteLater();
 }
 

src/lib/tabwidget/tabicon.cpp

@@ -28,7 +28,7 @@
 
 TabIcon::TabIcon(QWidget* parent)
     : QWidget(parent)
-    , m_tab(0)
+    , m_tab(nullptr)
     , m_currentFrame(0)
     , m_animationRunning(false)
     , m_audioIconDisplayed(false)

src/lib/tabwidget/tabstackedwidget.cpp

@@ -31,8 +31,8 @@
 
 TabStackedWidget::TabStackedWidget(QWidget* parent)
     : QWidget(parent)
-    , m_stack(0)
+    , m_stack(nullptr)
-    , m_tabBar(0)
+    , m_tabBar(nullptr)
     , m_currentIndex(-1)
     , m_previousIndex(-1)
 {
@@ -265,7 +265,7 @@ int TabStackedWidget::pinUnPinTab(int index, const QString &title)
     QString toolTip =  tabToolTip(index);
 
     m_tabBar->m_blockCurrentChangedSignal = true;
-    m_tabBar->setTabButton(index, m_tabBar->iconButtonPosition(), 0);
+    m_tabBar->setTabButton(index, m_tabBar->iconButtonPosition(), nullptr);
 
     m_stack->removeWidget(widget);
     int newIndex = insertTab(makePinned ? 0 : m_tabBar->pinnedTabsCount(), widget, title, makePinned);

src/lib/tabwidget/tabwidget.h

@@ -124,7 +124,7 @@ public Q_SLOTS:
     void detachTab(int index);
     void loadTab(int index);
     void unloadTab(int index);
-    void restoreClosedTab(QObject* obj = 0);
+    void restoreClosedTab(QObject* obj = nullptr);
     void restoreAllClosedTabs();
     void clearClosedTabsList();
 

src/lib/tools/aesinterface.cpp

@@ -71,7 +71,7 @@ bool AesInterface::init(int evpMode, const QByteArray &password, const QByteArra
     // Gen "key" for AES 256 CBC mode. A SHA1 digest is used to hash the supplied
     // key material. nrounds is the number of times that we hash the material.
     // More rounds are more secure but slower.
-    i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha256(), 0, (uchar*)password.data(), password.size(), nrounds, key, 0);
+    i = EVP_BytesToKey(EVP_aes_256_cbc(), EVP_sha256(), nullptr, (uchar*)password.data(), password.size(), nrounds, key, nullptr);
 
     if (i != 32) {
         qWarning("Key size is %d bits - should be 256 bits", i * 8);
@@ -143,7 +143,7 @@ QByteArray AesInterface::decrypt(const QByteArray &cipherData, const QByteArray
     }
 
     if (cipherSections.at(0).toInt() > AesInterface::VERSION) {
-        QMessageBox::information(0, tr("Warning!"), tr("Data has been encrypted with a newer version of Falkon."
+        QMessageBox::information(nullptr, tr("Warning!"), tr("Data has been encrypted with a newer version of Falkon."
                                  "\nPlease install latest version of Falkon."));
         return {};
     }

src/lib/tools/html5permissions/html5permissionsnotification.cpp

@@ -28,7 +28,7 @@
 
 
 HTML5PermissionsNotification::HTML5PermissionsNotification(const QUrl &origin, QWebEnginePage* page, const QWebEnginePage::Feature &feature)
-    : AnimatedWidget(AnimatedWidget::Down, 300, 0)
+    : AnimatedWidget(AnimatedWidget::Down, 300, nullptr)
     , ui(new Ui::HTML5PermissionsNotification)
     , m_origin(origin)
     , m_page(page)

src/lib/tools/listitemdelegate.cpp

@@ -102,7 +102,7 @@ QSize ListItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QMode
 
         const QWidget* w = opt.widget;
         const QStyle* style = w ? w->style() : QApplication::style();
-        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, 0) + 1;
+        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr) + 1;
 
         m_padding = padding > 5 ? padding : 5;
 
@@ -111,7 +111,7 @@ QSize ListItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QMode
         // Update height of parent widget
         QWidget* p = qobject_cast<QWidget*>(parent());
         if (p && m_updateParentHeight) {
-            int frameWidth = p->style()->pixelMetric(QStyle::PM_DefaultFrameWidth, 0, p);
+            int frameWidth = p->style()->pixelMetric(QStyle::PM_DefaultFrameWidth, nullptr, p);
             p->setFixedHeight(m_itemHeight + 2 * frameWidth);
         }
     }

src/lib/tools/qztools.cpp

@@ -851,7 +851,7 @@ bool QzTools::startExternalProcess(const QString &executable, const QString &arg
         info = info.arg(QObject::tr("Executable: "), executable,
                         QObject::tr("Arguments: "), arguments.join(QLatin1Char(' ')));
 
-        QMessageBox::critical(0, QObject::tr("Cannot start external program"),
+        QMessageBox::critical(nullptr, QObject::tr("Cannot start external program"),
                               QObject::tr("Cannot start external program! %1").arg(info));
     }
 
@@ -863,7 +863,7 @@ static xcb_connection_t *getXcbConnection()
 {
     const QNativeInterface::QX11Application *x11App = qApp->nativeInterface<QNativeInterface::QX11Application>();
     if (x11App == nullptr)
-        return 0;
+        return nullptr;
     return x11App->connection();
 }
 #endif
@@ -875,7 +875,7 @@ void QzTools::setWmClass(const QString &name, const QWidget* widget)
         return;
 
     xcb_connection_t *connection = getXcbConnection();
-    if (connection == 0)
+    if (connection == nullptr)
         return;
 
     const QByteArray nameData = name.toUtf8();

src/lib/tools/toolbutton.cpp

@@ -26,7 +26,7 @@
 
 ToolButton::ToolButton(QWidget* parent)
     : QToolButton(parent)
-    , m_menu(0)
+    , m_menu(nullptr)
 {
     setMinimumWidth(16);
 

src/lib/tools/treewidget.cpp

@@ -94,7 +94,7 @@ QList<QTreeWidgetItem*> TreeWidget::allItems()
 {
     if (m_refreshAllItemsNeeded) {
         m_allTreeItems.clear();
-        iterateAllItems(0);
+        iterateAllItems(nullptr);
         m_refreshAllItemsNeeded = false;
     }
 

src/lib/webengine/webpage.cpp

@@ -72,8 +72,8 @@ static const bool kEnableJsNonBlockDialogs = qEnvironmentVariableIsSet("FALKON_E
 
 WebPage::WebPage(QObject* parent)
     : QWebEnginePage(mApp->webProfile(), parent)
-    , m_fileWatcher(0)
+    , m_fileWatcher(nullptr)
-    , m_runningLoop(0)
+    , m_runningLoop(nullptr)
     , m_loadProgress(100)
     , m_blockAlerts(false)
     , m_secureStatus(false)
@@ -132,7 +132,7 @@ WebPage::~WebPage()
 
     if (m_runningLoop) {
         m_runningLoop->exit(1);
-        m_runningLoop = 0;
+        m_runningLoop = nullptr;
     }
 }
 
@@ -555,7 +555,7 @@ bool WebPage::javaScriptPrompt(const QUrl &securityOrigin, const QString &msg, c
     if (eLoop.exec() == 1) {
         return result;
     }
-    m_runningLoop = 0;
+    m_runningLoop = nullptr;
 
     QString x = ui->lineEdit->text();
     bool _result = ui->buttonBox->buttonRole(clicked) == QDialogButtonBox::AcceptRole;
@@ -601,7 +601,7 @@ bool WebPage::javaScriptConfirm(const QUrl &securityOrigin, const QString &msg)
     if (eLoop.exec() == 1) {
         return false;
     }
-    m_runningLoop = 0;
+    m_runningLoop = nullptr;
 
     bool result = ui->buttonBox->buttonRole(clicked) == QDialogButtonBox::AcceptRole;
 
@@ -656,7 +656,7 @@ void WebPage::javaScriptAlert(const QUrl &securityOrigin, const QString &msg)
     if (eLoop.exec() == 1) {
         return;
     }
-    m_runningLoop = 0;
+    m_runningLoop = nullptr;
 
     m_blockAlerts = ui->preventAlerts->isChecked();
 

src/lib/webengine/webscrollbarmanager.h

@@ -31,7 +31,7 @@ class WebScrollBarManager : public QObject
     Q_OBJECT
 
 public:
-    explicit WebScrollBarManager(QObject *parent = 0);
+    explicit WebScrollBarManager(QObject *parent = nullptr);
 
     void loadSettings();
 

src/lib/webengine/webview.cpp

@@ -58,7 +58,7 @@ WebView::WebView(QWidget* parent)
     : QWebEngineView(parent)
     , m_progress(100)
     , m_backgroundActivity(false)
-    , m_page(0)
+    , m_page(nullptr)
     , m_firstLoad(false)
 {
     connect(this, &QWebEngineView::loadStarted, this, &WebView::slotLoadStarted);

src/lib/webtab/tabbedwebview.cpp

@@ -37,7 +37,7 @@
 
 TabbedWebView::TabbedWebView(WebTab* webTab)
     : WebView(webTab)
-    , m_window(0)
+    , m_window(nullptr)
     , m_webTab(webTab)
     , m_menu(new Menu(this))
 {

src/plugins/AutoScroll/autoscroller.cpp

@@ -81,7 +81,7 @@ void ScrollIndicator::paintEvent(QPaintEvent *event)
 
 AutoScroller::AutoScroller(const QString &settingsFile, QObject* parent)
     : QObject(parent)
-    , m_view(0)
+    , m_view(nullptr)
     , m_settingsFile(settingsFile)
 {
     m_indicator = new ScrollIndicator;
@@ -272,7 +272,7 @@ void AutoScroller::stopScrolling()
     QApplication::restoreOverrideCursor();
 
     m_indicator->hide();
-    m_indicator->setParent(0);
+    m_indicator->setParent(nullptr);
     m_frameScroller->stopScrolling();
 }
 

src/plugins/AutoScroll/autoscroller.h

@@ -46,7 +46,7 @@ class AutoScroller : public QObject
 {
     Q_OBJECT
 public:
-    explicit AutoScroller(const QString &settingsFile, QObject* parent = 0);
+    explicit AutoScroller(const QString &settingsFile, QObject* parent = nullptr);
     ~AutoScroller() override;
 
     bool mouseMove(QObject* obj, QMouseEvent* event);

src/plugins/AutoScroll/autoscrollplugin.cpp

@@ -25,7 +25,7 @@
 
 AutoScrollPlugin::AutoScrollPlugin()
     : QObject()
-    , m_scroller(0)
+    , m_scroller(nullptr)
 {
 }
 

src/plugins/AutoScroll/autoscrollsettings.h

@@ -32,7 +32,7 @@ class AutoScrollSettings : public QDialog
     Q_OBJECT
 
 public:
-    explicit AutoScrollSettings(AutoScroller* scroller, QWidget* parent = 0);
+    explicit AutoScrollSettings(AutoScroller* scroller, QWidget* parent = nullptr);
     ~AutoScrollSettings();
 
 private Q_SLOTS:

src/plugins/AutoScroll/framescroller.cpp

@@ -23,7 +23,7 @@
 
 FrameScroller::FrameScroller(QObject* parent)
     : QObject(parent)
-    , m_page(0)
+    , m_page(nullptr)
     , m_lengthX(0)
     , m_lengthY(0)
     , m_divider(8.0)

src/plugins/AutoScroll/framescroller.h

@@ -29,7 +29,7 @@ class FrameScroller : public QObject
     Q_OBJECT
 
 public:
-    explicit FrameScroller(QObject* parent = 0);
+    explicit FrameScroller(QObject* parent = nullptr);
 
     void setPage(WebPage *page);
 

src/plugins/FlashCookieManager/fcm_dialog.h

@@ -39,7 +39,7 @@ class FCM_Dialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit FCM_Dialog(FCM_Plugin* manager, QWidget* parent = 0);
+    explicit FCM_Dialog(FCM_Plugin* manager, QWidget* parent = nullptr);
     ~FCM_Dialog() override;
 
     void refreshView(bool forceReload = false);

src/plugins/FlashCookieManager/fcm_notification.cpp

@@ -21,7 +21,7 @@
 #include "fcm_plugin.h"
 
 FCM_Notification::FCM_Notification(FCM_Plugin* manager, int newOriginsCount)
-    : AnimatedWidget(AnimatedWidget::Down, 300, 0)
+    : AnimatedWidget(AnimatedWidget::Down, 300, nullptr)
     , ui(new Ui::FCM_Notification)
     , m_manager(manager)
 {

src/plugins/FlashCookieManager/fcm_plugin.cpp

@@ -322,7 +322,7 @@ void FCM_Plugin::mainWindowDeleted(BrowserWindow *window)
     }
 
     if (m_fcmDialog && m_fcmDialog->parent() == window) {
-        m_fcmDialog->setParent(0);
+        m_fcmDialog->setParent(nullptr);
     }
 
     window->statusBar()->removeButton(m_statusBarIcons.value(window));

src/plugins/GnomeKeyringPasswords/gnomekeyringplugin.cpp

@@ -26,7 +26,7 @@
 
 GnomeKeyringPlugin::GnomeKeyringPlugin()
     : QObject()
-    , m_backend(0)
+    , m_backend(nullptr)
 {
 }
 

src/plugins/GreaseMonkey/gm_jsobject.cpp

@@ -24,7 +24,7 @@
 
 GM_JSObject::GM_JSObject(QObject* parent)
     : QObject(parent)
-    , m_settings(0)
+    , m_settings(nullptr)
 {
 }
 

src/plugins/GreaseMonkey/gm_jsobject.h

@@ -27,7 +27,7 @@ class GM_JSObject : public QObject
 {
     Q_OBJECT
 public:
-    explicit GM_JSObject(QObject* parent = 0);
+    explicit GM_JSObject(QObject* parent = nullptr);
     ~GM_JSObject();
 
     void setSettingsFile(const QString &name);

src/plugins/GreaseMonkey/gm_manager.h

@@ -36,7 +36,7 @@ class GM_Manager : public QObject
 {
     Q_OBJECT
 public:
-    explicit GM_Manager(const QString &sPath, QObject* parent = 0);
+    explicit GM_Manager(const QString &sPath, QObject* parent = nullptr);
     ~GM_Manager();
 
     void showSettings(QWidget* parent);

src/plugins/GreaseMonkey/gm_notification.cpp

@@ -25,7 +25,7 @@
 #include <QFile>
 
 GM_Notification::GM_Notification(GM_Manager* manager, const QString &tmpfileName, const QString &fileName)
-    : AnimatedWidget(AnimatedWidget::Down, 300, 0)
+    : AnimatedWidget(AnimatedWidget::Down, 300, nullptr)
     , ui(new Ui::GM_Notification)
     , m_manager(manager)
     , m_tmpFileName(tmpfileName)
@@ -47,7 +47,7 @@ void GM_Notification::installScript()
 {
     bool success = false;
 
-    GM_Script* script = 0;
+    GM_Script* script = nullptr;
     QString message = tr("Cannot install script");
 
     if (QFile::copy(m_tmpFileName, m_fileName)) {

src/plugins/GreaseMonkey/gm_plugin.cpp

@@ -29,7 +29,7 @@
 
 GM_Plugin::GM_Plugin()
     : QObject()
-    , m_manager(0)
+    , m_manager(nullptr)
 {
 }
 

src/plugins/GreaseMonkey/gm_plugin.h

@@ -34,7 +34,7 @@ public:
     void init(InitState state, const QString &settingsPath) override;
     void unload() override;
     bool testPlugin() override;
-    void showSettings(QWidget* parent = 0) override;
+    void showSettings(QWidget* parent = nullptr) override;
 
     bool acceptNavigationRequest(WebPage *page, const QUrl &url, QWebEnginePage::NavigationType type, bool isMainFrame) override;
 

src/plugins/GreaseMonkey/settings/gm_settings.cpp

@@ -195,7 +195,7 @@ void GM_Settings::loadScripts()
 GM_Script* GM_Settings::getScript(QListWidgetItem* item)
 {
     if (!item) {
-        return 0;
+        return nullptr;
     }
 
     GM_Script* script = static_cast<GM_Script*>(item->data(Qt::UserRole + 10).value<void*>());

src/plugins/GreaseMonkey/settings/gm_settings.h

@@ -35,7 +35,7 @@ class GM_Settings : public QDialog
     Q_OBJECT
 
 public:
-    explicit GM_Settings(GM_Manager* manager, QWidget* parent = 0);
+    explicit GM_Settings(GM_Manager* manager, QWidget* parent = nullptr);
     ~GM_Settings();
 
 private Q_SLOTS:

src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.cpp

@@ -157,7 +157,7 @@ QSize GM_SettingsListDelegate::sizeHint(const QStyleOptionViewItem &option, cons
 
         const QWidget* w = opt.widget;
         const QStyle* style = w ? w->style() : QApplication::style();
-        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, 0) + 1;
+        const int padding = style->pixelMetric(QStyle::PM_FocusFrameHMargin, nullptr) + 1;
 
         QFont titleFont = opt.font;
         titleFont.setBold(true);

src/plugins/GreaseMonkey/settings/gm_settingslistdelegate.h

@@ -23,7 +23,7 @@
 class GM_SettingsListDelegate : public QStyledItemDelegate
 {
 public:
-    explicit GM_SettingsListDelegate(QObject* parent = 0);
+    explicit GM_SettingsListDelegate(QObject* parent = nullptr);
 
     int padding() const;
 

src/plugins/GreaseMonkey/settings/gm_settingslistwidget.h

@@ -26,7 +26,7 @@ class GM_SettingsListWidget : public QListWidget
 {
     Q_OBJECT
 public:
-    explicit GM_SettingsListWidget(QWidget* parent = 0);
+    explicit GM_SettingsListWidget(QWidget* parent = nullptr);
 
 Q_SIGNALS:
     void removeItemRequested(QListWidgetItem* item);

src/plugins/GreaseMonkey/settings/gm_settingsscriptinfo.h

@@ -32,7 +32,7 @@ class GM_SettingsScriptInfo : public QDialog
     Q_OBJECT
 
 public:
-    explicit GM_SettingsScriptInfo(GM_Script* script, QWidget* parent = 0);
+    explicit GM_SettingsScriptInfo(GM_Script* script, QWidget* parent = nullptr);
     ~GM_SettingsScriptInfo();
 
 private Q_SLOTS:

src/plugins/KDEFrameworksIntegration/kwalletpasswordbackend.cpp

@@ -48,7 +48,7 @@ static QMap<QString, QString> encodeEntry(const PasswordEntry &entry)
 
 KWalletPasswordBackend::KWalletPasswordBackend()
     : PasswordBackend()
-    , m_wallet(0)
+    , m_wallet(nullptr)
 {
 }
 

src/plugins/MouseGestures/3rdparty/QjtMouseGesture.h

@@ -92,7 +92,7 @@ class QjtMouseGesture : public QObject
 {
     Q_OBJECT
 public:
-    QjtMouseGesture(const DirectionList &directions, QObject* parent = 0);
+    QjtMouseGesture(const DirectionList &directions, QObject* parent = nullptr);
     ~QjtMouseGesture();
 
     const DirectionList directions() const;

src/plugins/MouseGestures/3rdparty/QjtMouseGestureFilter.h

@@ -62,7 +62,7 @@ public:
      *  Notice that this all events for this button are
      *  swallowed by the filter.
      */
-    QjtMouseGestureFilter(bool allowDiagonals = false, Qt::MouseButton gestureButton = Qt::RightButton, int minimumMovement = 5, double minimumMatch = 0.9, QObject* parent = 0);
+    QjtMouseGestureFilter(bool allowDiagonals = false, Qt::MouseButton gestureButton = Qt::RightButton, int minimumMovement = 5, double minimumMatch = 0.9, QObject* parent = nullptr);
     ~QjtMouseGestureFilter() override;
 
     /*
@@ -77,9 +77,9 @@ public:
      */
     void clearGestures(bool deleteGestures = false);
 
-    bool mouseButtonPressEvent(QMouseEvent* event, QObject* obj = 0);
+    bool mouseButtonPressEvent(QMouseEvent* event, QObject* obj = nullptr);
-    bool mouseButtonReleaseEvent(QMouseEvent* event, QObject* obj = 0);
+    bool mouseButtonReleaseEvent(QMouseEvent* event, QObject* obj = nullptr);
-    bool mouseMoveEvent(QMouseEvent* event, QObject* obj = 0);
+    bool mouseMoveEvent(QMouseEvent* event, QObject* obj = nullptr);
 
 protected:
     bool eventFilter(QObject* obj, QEvent* event) override;

src/plugins/MouseGestures/3rdparty/ring_buffer.h

@@ -51,7 +51,7 @@ public:
     typedef const T*       const_iterator;
 
     RingBuffer() {
-        array = 0;
+        array = nullptr;
         size = 0;
         read = 0;
         write = 0;

src/plugins/MouseGestures/mousegestures.cpp

@@ -33,7 +33,7 @@
 
 MouseGestures::MouseGestures(const QString &settingsPath, QObject* parent)
     : QObject(parent)
-    , m_filter(0)
+    , m_filter(nullptr)
     , m_settingsFile(settingsPath + QL1S("/extensions.ini"))
     , m_button(Qt::MiddleButton)
 {

src/plugins/MouseGestures/mousegestures.h

@@ -31,7 +31,7 @@ class MouseGestures : public QObject
 {
     Q_OBJECT
 public:
-    explicit MouseGestures(const QString &settingsPath, QObject* parent = 0);
+    explicit MouseGestures(const QString &settingsPath, QObject* parent = nullptr);
     ~MouseGestures();
 
     bool mousePress(QObject* obj, QMouseEvent* event);

src/plugins/MouseGestures/mousegesturessettingsdialog.h

@@ -33,7 +33,7 @@ class MouseGesturesSettingsDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit MouseGesturesSettingsDialog(MouseGestures* gestures, QWidget* parent = 0);
+    explicit MouseGesturesSettingsDialog(MouseGestures* gestures, QWidget* parent = nullptr);
     ~MouseGesturesSettingsDialog();
 
 private Q_SLOTS:

src/plugins/PIM/PIM_handler.h

@@ -35,7 +35,7 @@ class PIM_Handler : public QObject
 {
     Q_OBJECT
 public:
-    explicit PIM_Handler(const QString &sPath, QObject* parent = 0);
+    explicit PIM_Handler(const QString &sPath, QObject* parent = nullptr);
 
     void populateWebViewMenu(QMenu* menu, WebView* view, const WebHitTestResult &hitTest);
     bool keyPress(WebView* view, QKeyEvent* event);
@@ -44,7 +44,7 @@ public:
 
 public Q_SLOTS:
     void webPageCreated(WebPage* page);
-    void showSettings(QWidget* parent = 0);
+    void showSettings(QWidget* parent = nullptr);
 
 private Q_SLOTS:
     void loadSettings();

src/plugins/PIM/PIM_plugin.cpp

@@ -27,7 +27,7 @@
 
 PIM_Plugin::PIM_Plugin()
     : QObject()
-    , m_handler(0)
+    , m_handler(nullptr)
 {
 }
 

src/plugins/PIM/PIM_settings.h

@@ -33,7 +33,7 @@ class PIM_Settings : public QDialog
     Q_OBJECT
 
 public:
-    explicit PIM_Settings(const QString &settingsFile, QWidget* parent = 0);
+    explicit PIM_Settings(const QString &settingsFile, QWidget* parent = nullptr);
     ~PIM_Settings();
 
 private Q_SLOTS: