Added Show source of selection feature. However, in Qt 4.8 beta it is

buggy, so it is disabled until it will be fixed

src/app/qupzilla.cpp

@@ -911,9 +911,9 @@ void QupZilla::showPreferences()
     prefs->show();
 }
 
-void QupZilla::showSource()
+void QupZilla::showSource(const QString &selectedHtml)
 {
-    SourceViewer* source = new SourceViewer(weView()->page());
+    SourceViewer* source = new SourceViewer(weView()->page(), selectedHtml);
     source->show();
 }
 

src/app/qupzilla.h

@@ -127,7 +127,7 @@ public slots:
     void loadActionUrl();
     void bookmarkPage();
     void loadAddress(QUrl url) { weView()->load(url); locationBar()->setText(url.toEncoded()); }
-    void showSource();
+    void showSource(const QString& selectedHtml = "");
     void showPageInfo();
     void receiveMessage(MainApplication::MessageType mes, bool state);
 

src/other/sourceviewer.cpp

@@ -20,8 +20,8 @@
 #include "htmlhighlighter.h"
 #include "sourceviewersearch.h"
 
-SourceViewer::SourceViewer(QWebPage* page, QWidget* parent) :
-    QWidget(parent)
+SourceViewer::SourceViewer(QWebPage* page, const QString &selectedHtml) :
+    QWidget(0)
     ,m_page(page)
 {
     setAttribute(Qt::WA_DeleteOnClose);
@@ -94,6 +94,10 @@ SourceViewer::SourceViewer(QWebPage* page, QWidget* parent) :
     const QRect screen = QApplication::desktop()->screenGeometry();
     const QRect &size = QWidget::geometry();
     QWidget::move( (screen.width()-size.width())/2, (screen.height()-size.height())/2 );
+
+    //Highlight selectedHtml
+    if (!selectedHtml.isEmpty())
+        m_sourceEdit->find(selectedHtml, QTextDocument::FindWholeWords);
 }
 
 void SourceViewer::save()

src/other/sourceviewer.h

@@ -38,7 +38,7 @@ class SourceViewer : public QWidget
 {
     Q_OBJECT
 public:
-    explicit SourceViewer(QWebPage* page, QWidget* parent = 0);
+    explicit SourceViewer(QWebPage* page, const QString &selectedHtml);
     QTextEdit* sourceEdit() { return m_sourceEdit; }
 signals:
 

src/webview/webview.cpp

@@ -468,7 +468,7 @@ void WebView::contextMenuEvent(QContextMenuEvent* event)
         menu->addAction(tr("Send link..."), this, SLOT(sendLinkByMail()))->setData(r.linkUrl());
         menu->addAction(QIcon::fromTheme("edit-copy"), tr("&Copy link address"), this, SLOT(copyLinkToClipboard()))->setData(r.linkUrl());
         menu->addSeparator();
-        if (!page()->selectedText().isEmpty())
+        if (!selectedText().isEmpty())
             menu->addAction(pageAction(QWebPage::Copy));
     }
 
@@ -483,7 +483,7 @@ void WebView::contextMenuEvent(QContextMenuEvent* event)
         menu->addAction(tr("Send image..."), this, SLOT(sendLinkByMail()))->setData(r.linkUrl());
         menu->addSeparator();
         //menu->addAction(tr("Block image"), this, SLOT(blockImage()))->setData(r.imageUrl().toString());
-        if (!page()->selectedText().isEmpty())
+        if (!selectedText().isEmpty())
             menu->addAction(pageAction(QWebPage::Copy));
     }
 
@@ -534,7 +534,7 @@ void WebView::contextMenuEvent(QContextMenuEvent* event)
         menu->addAction(tr("Send page..."), this, SLOT(sendLinkByMail()))->setData(url());
         menu->addSeparator();
         menu->addAction(QIcon::fromTheme("edit-select-all"), tr("Select &all"), this, SLOT(selectAll()));
-        if (!page()->selectedText().isEmpty())
+        if (!selectedText().isEmpty())
             menu->addAction(pageAction(QWebPage::Copy));
 
         menu->addSeparator();
@@ -545,13 +545,18 @@ void WebView::contextMenuEvent(QContextMenuEvent* event)
 
     mApp->plugins()->populateWebViewMenu(menu, this, r);
 
-    if (!page()->selectedText().isEmpty()) {
+    if (!selectedText().isEmpty()) {
         menu->addSeparator();
         QString selectedText = page()->selectedText();
         selectedText.truncate(20);
         menu->addAction(QIcon(":icons/menu/google.png"), tr("Search \"%1 ..\" on &Google").arg(selectedText), this, SLOT(searchOnGoogle()))->setData(page()->selectedText());
     }
 
+#if QT_VERSION == 0x040800
+//    if (!selectedHtml().isEmpty())
+//        menu->addAction(tr("Show source of selection"), this, SLOT(showSourceOfSelection()));
+#endif
+
     if (!menu->isEmpty()) {
         //Prevent choosing first option with double rightclick
         QPoint pos = QCursor::pos();
@@ -635,6 +640,11 @@ void WebView::showSource()
     p_QupZilla->showSource();
 }
 
+void WebView::showSourceOfSelection()
+{
+    p_QupZilla->showSource(selectedHtml());
+}
+
 void WebView::downloadLinkToDisk()
 {
     if (QAction* action = qobject_cast<QAction*>(sender())) {

src/webview/webview.h

@@ -101,6 +101,7 @@ private slots:
     void sendLinkByMail();
     void bookmarkLink();
     void showSource();
+    void showSourceOfSelection();
     void showSiteInfo();
     void getFocus(const QUrl &urla);
     void showInspector();