Add support for KDE Web Shortcus

There is a submenu in the context menu for searching selected text using
any of the enabled search provider and opening the result in the default
web browser.

This could be useful for searching compilation failure messages, warning
messages in logfile, etc.

DIGEST:
FEATURE:
FIXED-IN: 4.9.0
REVIEW: 104493

src/SessionController.cpp

@@ -36,6 +36,7 @@
 #include <KMessageBox>
 #include <KRun>
 #include <KShell>
+#include <KToolInvocation>
 #include <KStandardDirs>
 #include <KToggleAction>
 #include <KSelectAction>
@@ -44,6 +45,8 @@
 #include <KXMLGUIFactory>
 #include <KXMLGUIBuilder>
 #include <KDebug>
+#include <KUriFilter>
+#include <KStringHandler>
 #include <kcodecaction.h>
 
 // Konsole
@@ -97,6 +100,7 @@ SessionController::SessionController(Session* session , TerminalDisplay* view, Q
     , _searchBar(0)
     , _codecAction(0)
     , _switchProfileMenu(0)
+    , _webSearchMenu(0)
     , _listenForScreenWindowUpdates(false)
     , _preventClose(false)
     , _keepIconUntilInteraction(false)
@@ -332,13 +336,87 @@ void SessionController::setupPrimaryScreenSpecificActions(bool use)
     selectAllAction->setEnabled(use);
 }
 
-void SessionController::updateCopyAction(const QString& text)
+void SessionController::selectionChanged(const QString& selectedText)
 {
-    KActionCollection* collection = actionCollection();
-    QAction* copyAction = collection->action("edit_copy");
+    _selectedText = selectedText;
+    updateCopyAction(selectedText);
+    updateWebSearchMenu();
+}
 
-    // copy action is meaningful only when some text is selcted.
-    copyAction->setEnabled(!text.isEmpty());
+void SessionController::updateCopyAction(const QString& selectedText)
+{
+    QAction* copyAction = actionCollection()->action("edit_copy");
+
+    // copy action is meaningful only when some text is selected.
+    copyAction->setEnabled(!selectedText.isEmpty());
+}
+
+void SessionController::updateWebSearchMenu()
+{
+    // reset
+    _webSearchMenu->setVisible(false);
+    _webSearchMenu->menu()->clear();
+
+    if ( _selectedText.isEmpty() )
+        return ;
+
+    QString searchText = _selectedText;
+    searchText = searchText.replace('\n', ' ').replace('\r', ' ').simplified();
+
+    if (searchText.isEmpty())
+        return;
+
+    KUriFilterData filterData(searchText);
+    filterData.setSearchFilteringOptions(KUriFilterData::RetrievePreferredSearchProvidersOnly);
+
+    if (KUriFilter::self()->filterSearchUri(filterData, KUriFilter::NormalTextFilter)) {
+        const QStringList searchProviders = filterData.preferredSearchProviders();
+        if (!searchProviders.isEmpty()) {
+
+            _webSearchMenu->setText(i18n("Search for '%1' with",  KStringHandler::rsqueeze(searchText, 16)));
+
+            KAction* action = 0;
+
+            foreach(const QString& searchProvider, searchProviders)
+            {
+                action = new KAction(searchProvider, _webSearchMenu);
+                action->setIcon(KIcon(filterData.iconNameForPreferredSearchProvider(searchProvider)));
+                action->setData(filterData.queryForPreferredSearchProvider(searchProvider));
+                connect(action, SIGNAL(triggered()), this, SLOT(handleWebShortcutAction()));
+                _webSearchMenu->addAction(action);
+            }
+
+            _webSearchMenu->addSeparator();
+
+            action = new KAction(i18n("Configure Web Shortcuts..."), _webSearchMenu);
+            action->setIcon(KIcon("configure"));
+            connect(action, SIGNAL(triggered()), this, SLOT(configureWebShortcuts()));
+            _webSearchMenu->addAction(action);
+
+            _webSearchMenu->setVisible(true);
+        }
+
+    }
+
+}
+
+void SessionController::handleWebShortcutAction()
+{
+    KAction* action = qobject_cast<KAction*>(sender());
+    if (!action)
+        return;
+
+    KUriFilterData filterData(action->data().toString());
+
+    if (KUriFilter::self()->filterUri(filterData, QStringList() << "kurisearchfilter")) {
+        const KUrl& url = filterData.uri();
+        new KRun(url, QApplication::activeWindow(), 0, true, true);
+    }
+}
+
+void SessionController::configureWebShortcuts()
+{
+    KToolInvocation::kdeinitExec("kcmshell4", QStringList() << "ebrowsing");
 }
 
 bool SessionController::eventFilter(QObject* watched , QEvent* event)
@@ -469,6 +547,12 @@ void SessionController::setupCommonActions()
     action->setText(i18n("Paste Selection"));
     action->setShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_Insert));
 
+    _webSearchMenu = new KActionMenu(i18n("Web Search"), _view);
+    _webSearchMenu->setIcon(KIcon("preferences-web-browser-shortcuts"));
+    _webSearchMenu->setVisible(false);
+    collection->addAction("web-search", _webSearchMenu);
+
+
     action = collection->addAction("select-all", this, SLOT(selectAll()));
     action->setText(i18n("&Select All"));
     action->setIcon(KIcon("edit-select-all"));
@@ -1189,10 +1273,15 @@ void SessionController::showDisplayContextMenu(const QPoint& position)
         QAction* contentSeparator = new QAction(popup);
         contentSeparator->setSeparator(true);
         contentActions << contentSeparator;
+        popup->insertActions(popup->actions().value(0, 0), contentActions);
+
+        // always update this submenu before showing the context menu,
+        // because the available search services might have changed
+        // since the context menu is shown last time
+        updateWebSearchMenu();
 
         _preventClose = true;
 
-        popup->insertActions(popup->actions().value(0, 0), contentActions);
         QAction* chosen = popup->exec(_view->mapToGlobal(position));
 
         // check for validity of the pointer to the popup menu