[TabWidget] Make sure current tab is loaded on session restore

Fixes issue with current tab not being loaded on session restore
with "don't load tabs until selected" option.
It was needed to switch to other tab and then switch back to first tab
to actually load it.

Also pause updates of the whole browser window when restoring session.

src/lib/app/mainapplication.cpp

@@ -361,6 +361,7 @@ bool MainApplication::restoreSession(BrowserWindow* window, RestoreData restoreD
     m_isRestoring = true;
     setOverrideCursor(Qt::BusyCursor);
 
+    window->setUpdatesEnabled(false);
     window->tabWidget()->closeRecoveryTab();
 
     if (window->tabWidget()->normalTabsCount() > 1) {
@@ -369,9 +370,10 @@ bool MainApplication::restoreSession(BrowserWindow* window, RestoreData restoreD
         // Don't restore tabs in current window as user already opened
         // some new tabs.
         // Instead create new one and restore pinned tabs there
-
         BrowserWindow* newWin = createWindow(Qz::BW_OtherRestoredWindow);
+        newWin->setUpdatesEnabled(false);
         newWin->restoreWindowState(restoreData.first());
+        newWin->setUpdatesEnabled(true);
         restoreData.remove(0);
     }
     else {
@@ -383,15 +385,18 @@ bool MainApplication::restoreSession(BrowserWindow* window, RestoreData restoreD
         RestoreManager::WindowData data = restoreData.first();
         data.currentTab += tabCount;
         restoreData.remove(0);
-
         window->restoreWindowState(data);
     }
 
+    window->setUpdatesEnabled(true);
+
     processEvents();
 
     foreach (const RestoreManager::WindowData &data, restoreData) {
         BrowserWindow* window = createWindow(Qz::BW_OtherRestoredWindow);
+        window->setUpdatesEnabled(false);
         window->restoreWindowState(data);
+        window->setUpdatesEnabled(true);
 
         processEvents();
     }

src/lib/tabwidget/tabwidget.cpp

@@ -117,7 +117,6 @@ TabWidget::TabWidget(BrowserWindow* window, QWidget* parent)
     , m_lastTabIndex(-1)
     , m_lastBackgroundTabIndex(-1)
     , m_isClosingToLastTabIndex(false)
-    , m_isRestoringState(false)
 {
     setObjectName(QSL("tabwidget"));
 
@@ -331,8 +330,6 @@ int TabWidget::addView(const LoadRequest &req, const QString &title, const Qz::N
         QtWin::extendFrameIntoClientArea(m_window);
     }
 #endif
-    setUpdatesEnabled(false);
-
     QUrl url = req.url();
     m_lastTabIndex = currentIndex();
 
@@ -412,8 +409,6 @@ int TabWidget::addView(const LoadRequest &req, const QString &title, const Qz::N
         m_tabBar->ensureVisible(index);
     }
 
-    setUpdatesEnabled(true);
-
     emit changed();
 
 #ifdef Q_OS_WIN
@@ -513,9 +508,8 @@ void TabWidget::closeTab(int index, bool force)
 
 void TabWidget::currentTabChanged(int index)
 {
-    if (!validIndex(index) || m_isRestoringState) {
+    if (!validIndex(index))
         return;
-    }
 
     m_isClosingToLastTabIndex = m_lastBackgroundTabIndex == index;
     m_lastBackgroundTabIndex = -1;
@@ -827,8 +821,6 @@ void TabWidget::restorePinnedTabs()
     QList<QByteArray> tabHistory;
     stream >> tabHistory;
 
-    m_isRestoringState = true;
-
     for (int i = 0; i < pinnedTabs.count(); ++i) {
         QUrl url = QUrl::fromEncoded(pinnedTabs.at(i).toUtf8());
 
@@ -852,8 +844,6 @@ void TabWidget::restorePinnedTabs()
 
         m_tabBar->updatePinnedTabCloseButton(addedIndex);
     }
-
-    m_isRestoringState = false;
 }
 
 QByteArray TabWidget::saveState()
@@ -886,8 +876,6 @@ QByteArray TabWidget::saveState()
 
 bool TabWidget::restoreState(const QVector<WebTab::SavedTab> &tabs, int currentTab)
 {
-    m_isRestoringState = true;
-
     Qz::BrowserWindowType type = m_window->windowType();
 
     if (type == Qz::BW_FirstAppWindow || type == Qz::BW_MacFirstWindow) {
@@ -901,10 +889,11 @@ bool TabWidget::restoreState(const QVector<WebTab::SavedTab> &tabs, int currentT
         weTab(index)->restoreTab(tab);
     }
 
-    m_isRestoringState = false;
-
     setCurrentIndex(currentTab);
-    currentTabChanged(currentTab);
+
+    // WebTab is restoring state on showEvent
+    weTab()->hide();
+    weTab()->show();
 
     return true;
 }

src/lib/tabwidget/tabwidget.h

@@ -156,7 +156,6 @@ private:
     int m_lastTabIndex;
     int m_lastBackgroundTabIndex;
     bool m_isClosingToLastTabIndex;
-    bool m_isRestoringState;
 
     bool m_dontCloseWithOneTab;
     bool m_showClosedTabsButton;