plugin: Grab keyboard focus when the plugin window is clicked

src/backends/input.cpp

@@ -94,9 +94,13 @@ bool InputThread::worker(GdkEvent *event)
 		}
 		case GDK_BUTTON_PRESS:
 		{
-			//Grab focus, to receive keypresses
 			if(event->button.button == 1)
+			{
+				//Grab focus, to receive keypresses
+				engineData->grabFocus();
+
 				handleMouseDown(event->button.x,event->button.y);
+			}
 			ret=TRUE;
 			break;
 		}

src/main.cpp

@@ -84,6 +84,11 @@ class StandaloneEngineData: public EngineData
 	{
 		return true;
 	}
+        void grabFocus()
+	{
+		/* Nothing to do because the standalone main window is
+		 * always focused */
+	}
 };
 
 int main(int argc, char* argv[])

src/platforms/engineutils.h

@@ -78,6 +78,8 @@ class DLL_PUBLIC EngineData
 	 * It fills this->widget and this->window.
          */
 	void showWindow(uint32_t w, uint32_t h);
+	/* This function must be called within gdk_threads_enter/leave */
+        virtual void grabFocus()=0;
 	static gboolean inputDispatch(GtkWidget *widget, GdkEvent *event, EngineData* e)
 	{
 		RecMutex::Lock l(e->mutex);

src/plugin/plugin.cpp

@@ -482,6 +482,14 @@ GtkWidget* PluginEngineData::createGtkWidget()
 }
 #endif
 
+void PluginEngineData::grabFocus()
+{
+	if (!widget)
+		return;
+
+	gtk_widget_grab_focus(widget);
+}
+
 NPError nsPluginInstance::SetWindow(NPWindow* aWindow)
 {
 	if(aWindow == NULL)

src/plugin/plugin.h

@@ -88,6 +88,8 @@ class PluginEngineData:	public EngineData
 	GdkNativeWindow getWindowForGnash();
 	/* must be called within the gtk_main() thread and within gdk_threads_enter/leave */
 	GtkWidget* createGtkWidget();
+	/* must be called within the gtk_main() thread and within gdk_threads_enter/leave */
+        void grabFocus();
 };
 
 class nsPluginInstance : public nsPluginInstanceBase