This commit implements the new private browsign mode for rekonq:

- it implements a new KAaction in the Application class to trace changes on
- stops session management and save it, restoring last visited sites on restoring mormal mode
- implements necessary changes to iconmanager, urlbar & application

Please, note that the private browsing mode will definitely work just on KDE SC 4.6, cause of
the needed changes in kdewebkit to eg handle cookies and so on..
.
Hope you like it :)

7 files changed, 87 insertions, 60 deletions

diff --git a/src/application.cpp b/src/application.cpp
index 233be527..cadfa50f 100644
--- a/src/application.cpp
+++ b/src/application.cpp
@@ -55,10 +55,12 @@
 #include <KMessageBox>
 #include <KStandardDirs>
 #include <ThreadWeaver/Weaver>
+#include <KAction>
 
 // Qt Includes
 #include <QVBoxLayout>
 
+
 QWeakPointer<AdBlockManager> Application::s_adblockManager;
 QWeakPointer<BookmarkProvider> Application::s_bookmarkProvider;
 QWeakPointer<HistoryManager> Application::s_historyManager;
@@ -66,13 +68,20 @@ QWeakPointer<IconManager> Application::s_iconManager;
 QWeakPointer<OpenSearchManager> Application::s_opensearchManager;
 QWeakPointer<SessionManager> Application::s_sessionManager;
 
+
 using namespace ThreadWeaver;
 
+
 Application::Application()
         : KUniqueApplication()
+        , _privateBrowsingAction(0)
 {
     connect(Weaver::instance(), SIGNAL(jobDone(ThreadWeaver::Job*)),
             this, SLOT(loadResolvedUrl(ThreadWeaver::Job*)));
+
+    _privateBrowsingAction = new KAction(KIcon("view-media-artist"), i18n("Private &Browsing"), this);
+    _privateBrowsingAction->setCheckable(true);
+    connect(_privateBrowsingAction, SIGNAL(triggered(bool)), this, SLOT(setPrivateBrowsingMode(bool)));
 }
 
 
@@ -575,3 +584,55 @@ bool Application::clearDownloadsHistory()
     QFile downloadFile(downloadFilePath);
     return downloadFile.remove();
 }
+
+
+void Application::setPrivateBrowsingMode(bool b)
+{
+// NOTE
+// to let work nicely Private Browsing, we need the following:
+// - enable WebKit Private Browsing mode :)
+// - treat all cookies as session cookies 
+//  (so that they do not get saved to a persistent storage). Available from KDE SC 4.5.72, see BUG: 250122
+// - favicons (fixed in rekonq 0.5.87)
+// - save actual session (to restore it when Private Mode is closed) and stop storing it
+// - disable history saving
+
+    QWebSettings *settings = QWebSettings::globalSettings();
+    bool isJustEnabled = settings->testAttribute(QWebSettings::PrivateBrowsingEnabled);
+    if(isJustEnabled == b)
+        return;     // uhm... something goes wrong...
+        
+    if (b)
+    {
+        QString caption = i18n("Are you sure you want to turn on private browsing?");
+        QString text = i18n("<b>%1</b>"
+                            "<p>rekonq will save your current tabs for when you'll stop private browsing the net..</p>", caption);
+        
+        int button = KMessageBox::warningContinueCancel(mainWindow(), text, caption, KStandardGuiItem::cont(), KStandardGuiItem::cancel(), i18n("don't ask again") );
+        if (button != KMessageBox::Continue)
+            return;
+        
+        settings->setAttribute(QWebSettings::PrivateBrowsingEnabled, true);
+        _privateBrowsingAction->setChecked(true);
+        
+        Q_FOREACH(const QWeakPointer<MainWindow> &w, m_mainWindows)
+        {
+            w.data()->close();
+        }
+        loadUrl( KUrl("about:home"), Rekonq::NewWindow);
+    }
+    else
+    {
+        Q_FOREACH(const QWeakPointer<MainWindow> &w, m_mainWindows)
+        {
+            w.data()->close();
+        }
+
+        settings->setAttribute(QWebSettings::PrivateBrowsingEnabled, false);
+        _privateBrowsingAction->setChecked(false);
+        
+        loadUrl( KUrl("about:blank"), Rekonq::NewWindow);
+        if(!sessionManager()->restoreSession())
+            loadUrl( KUrl("about:home"), Rekonq::NewWindow);
+    }
+}
diff --git a/src/application.h b/src/application.h
index 8afb956f..b30e337c 100644
--- a/src/application.h
+++ b/src/application.h
@@ -50,6 +50,9 @@ class MainWindow;
 class OpenSearchManager;
 class SessionManager;
 
+class KAction;
+
+
 namespace ThreadWeaver {class Job;}
 
 
@@ -107,6 +110,8 @@ public:
     void addDownload(const QString &srcUrl, const QString &destUrl);
     DownloadList downloads();
     bool clearDownloadsHistory();
+    
+    KAction *privateBrowsingAction() { return _privateBrowsingAction; };
 
 public slots:
     /**
@@ -124,7 +129,6 @@ public slots:
     void removeMainWindow(MainWindow *window);
 
 private slots:
-
     /**
      * Any actions that can be delayed until the window is visible
      */
@@ -134,6 +138,9 @@ private slots:
 
     void updateConfiguration();
 
+    // the general place to set private browsing
+    void setPrivateBrowsingMode(bool);  
+
 private:
     static QWeakPointer<HistoryManager> s_historyManager;
     static QWeakPointer<BookmarkProvider> s_bookmarkProvider;
@@ -143,6 +150,8 @@ private:
     static QWeakPointer<IconManager> s_iconManager;
 
     MainWindowList m_mainWindows;
+
+    KAction *_privateBrowsingAction;
 };
 
 #endif // APPLICATION_H
diff --git a/src/iconmanager.cpp b/src/iconmanager.cpp
index 5086c59d..f5b60ea6 100644
--- a/src/iconmanager.cpp
+++ b/src/iconmanager.cpp
@@ -65,10 +65,6 @@ KIcon IconManager::iconForUrl(const KUrl &url)
     // first things first.. avoid infinite loop at startup
     if (url.isEmpty() || Application::instance()->mainWindowList().isEmpty())
         return KIcon("text-html");
-
-    // no icons in private browsing..
-    if(QWebSettings::globalSettings()->testAttribute(QWebSettings::PrivateBrowsingEnabled))
-        return KIcon("view-media-artist");
     
     QByteArray encodedUrl = url.toEncoded();
     // rekonq icons..
@@ -114,7 +110,7 @@ void IconManager::provideIcon(QWebPage *page, const KUrl &url, bool notify)
         return;
     }
 
-    // no icons in private browsing..
+    // do not load new icons in private browsing..
     if(QWebSettings::globalSettings()->testAttribute(QWebSettings::PrivateBrowsingEnabled))
     {
         kDebug() << "Private browsing, private icon...";
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index 555e58ae..7b4cf8a3 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -408,11 +408,9 @@ void MainWindow::setupActions()
     actionCollection()->addAction(QL1S("page_source"), a);
     connect(a, SIGNAL(triggered(bool)), this, SLOT(viewPageSource()));
 
-    a = new KAction(KIcon("view-media-artist"), i18n("Private &Browsing"), this);
-    a->setCheckable(true);
+    a = Application::instance()->privateBrowsingAction();
     actionCollection()->addAction(QL1S("private_browsing"), a);
-    connect(a, SIGNAL(triggered(bool)), this, SLOT(privateBrowsing(bool)));
-
+    
     a = new KAction(KIcon("edit-clear"), i18n("Clear Private Data..."), this);
     actionCollection()->addAction(QL1S("clear_private_data"), a);
     connect(a, SIGNAL(triggered(bool)), this, SLOT(clearPrivateData()));
@@ -728,42 +726,6 @@ void MainWindow::printRequested(QWebFrame *frame)
 }
 
 
-void MainWindow::privateBrowsing(bool enable)
-{
-    QWebSettings *settings = QWebSettings::globalSettings();
-    if (enable && !settings->testAttribute(QWebSettings::PrivateBrowsingEnabled))
-    {
-        QString title = i18n("Are you sure you want to turn on private browsing?");
-        QString text = i18n("<b>%1</b>"
-                            "<p>When private browsing is turned on,"
-                            " web pages are not added to the history,"
-                            " new cookies are not stored, current cookies cannot be accessed,"
-                            " site icons will not be stored, the session will not be saved."
-                            " Until you close the window, you can still click the Back and Forward buttons"
-                            " to return to the web pages you have opened.</p>", title);
-
-        int button = KMessageBox::warningContinueCancel(this, text, title);
-        if (button == KMessageBox::Continue)
-        {
-            settings->setAttribute(QWebSettings::PrivateBrowsingEnabled, true);
-            m_view->urlBar()->setPrivateMode(true);
-        }
-        else
-        {
-            actionCollection()->action( QL1S("private_browsing") )->setChecked(false);
-        }
-    }
-    else
-    {
-        settings->setAttribute(QWebSettings::PrivateBrowsingEnabled, false);
-        m_view->urlBar()->setPrivateMode(false);
-
-        m_lastSearch.clear();
-        m_view->reloadAllTabs();
-    }
-}
-
-
 void MainWindow::find(const QString & search)
 {
     if (!currentTab())
@@ -1349,6 +1311,10 @@ bool MainWindow::queryClose()
     if(Application::instance()->sessionSaving())
         return true;
 
+    // smooth private browsing mode
+    if(QWebSettings::globalSettings()->testAttribute(QWebSettings::PrivateBrowsingEnabled))
+        return true;
+    
     if (m_view->count() > 1)
     {
         int answer = KMessageBox::questionYesNoCancel(
diff --git a/src/mainwindow.h b/src/mainwindow.h
index ad4fa4b8..0395db4d 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -147,9 +147,6 @@ private slots:
     void viewPageSource();
     void viewFullScreen(bool enable);
 
-    // Tools Menu slots
-    void privateBrowsing(bool enable);
-
     // Settings Menu slot
     void preferences();
 
diff --git a/src/urlbar/urlbar.cpp b/src/urlbar/urlbar.cpp
index 3ec0b2fa..1f4a0367 100644
--- a/src/urlbar/urlbar.cpp
+++ b/src/urlbar/urlbar.cpp
@@ -79,7 +79,6 @@ void IconButton::mouseReleaseEvent(QMouseEvent* event)
 UrlBar::UrlBar(QWidget *parent)
         : KLineEdit(parent)
         , _tab(0)
-        , _privateMode(false)
         , _icon(new IconButton(this))
         , _suggestionTimer(new QTimer(this))
 {
@@ -159,7 +158,7 @@ void UrlBar::paintEvent(QPaintEvent *event)
     QColor backgroundColor;
     QColor foregroundColor;
 
-    if (_privateMode)
+    if (QWebSettings::globalSettings()->testAttribute(QWebSettings::PrivateBrowsingEnabled))
     {
         backgroundColor = QColor(220, 220, 220);  // light gray
         foregroundColor = Qt::black;
@@ -289,12 +288,6 @@ void UrlBar::focusInEvent(QFocusEvent *event)
 }
 
 
-void UrlBar::setPrivateMode(bool on)
-{
-    _privateMode = on;
-}
-
-
 void UrlBar::dropEvent(QDropEvent *event)
 {
     KLineEdit::dropEvent(event);
@@ -505,8 +498,15 @@ void UrlBar::suggest()
 
 void UrlBar::refreshFavicon()
 {
+    if(QWebSettings::globalSettings()->testAttribute(QWebSettings::PrivateBrowsingEnabled))
+    {
+        _icon->setIcon(KIcon("view-media-artist"));
+        return;
+    }
+    
     KUrl u = _tab->url();
-    if(u.scheme() == QL1S("about")) {
+    if(u.scheme() == QL1S("about")) 
+    {
         _icon->setIcon(KIcon("arrow-right"));
         return;
     }
diff --git a/src/urlbar/urlbar.h b/src/urlbar/urlbar.h
index dcd0ba5b..4cdd9d9c 100644
--- a/src/urlbar/urlbar.h
+++ b/src/urlbar/urlbar.h
@@ -89,7 +89,6 @@ public:
     explicit UrlBar(QWidget *parent = 0);
     ~UrlBar();
 
-    void setPrivateMode(bool on);
     void activateSuggestions(bool);
 
 public slots:
@@ -124,7 +123,6 @@ private:
 
     QWeakPointer<CompletionWidget> _box;
     WebTab *_tab;
-    bool _privateMode;
 
     IconButton *_icon;
     IconButtonPointerList _rightIconsList;