ui/gtk: copy to clipboard support

This adds a menu item to copy current selection to clipboard.
Seems handy for copying out guest error messages.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Message-id: 1460924740-24513-1-git-send-email-mst@redhat.com

[ kraxel: fix build with CONFIG_VTE=n ]
[ kraxel: fix build with CONFIG_VTE=n, now for real ]
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

ui/gtk.c

@@ -139,6 +139,7 @@ struct GtkDisplayState {
     GtkWidget *view_menu_item;
     GtkWidget *view_menu;
     GtkWidget *full_screen_item;
+    GtkWidget *copy_item;
     GtkWidget *zoom_in_item;
     GtkWidget *zoom_out_item;
     GtkWidget *zoom_fixed_item;
@@ -1589,6 +1590,14 @@ static GSList *gd_vc_menu_init(GtkDisplayState *s, VirtualConsole *vc,
 }
 
 #if defined(CONFIG_VTE)
+static void gd_menu_copy(GtkMenuItem *item, void *opaque)
+{
+    GtkDisplayState *s = opaque;
+    VirtualConsole *vc = gd_vc_find_current(s);
+
+    vte_terminal_copy_clipboard(VTE_TERMINAL(vc->vte.terminal));
+}
+
 static void gd_vc_adjustment_changed(GtkAdjustment *adjustment, void *opaque)
 {
     VirtualConsole *vc = opaque;
@@ -1825,6 +1834,10 @@ static void gd_connect_signals(GtkDisplayState *s)
                      G_CALLBACK(gd_menu_powerdown), s);
     g_signal_connect(s->quit_item, "activate",
                      G_CALLBACK(gd_menu_quit), s);
+#if defined(CONFIG_VTE)
+    g_signal_connect(s->copy_item, "activate",
+                     G_CALLBACK(gd_menu_copy), s);
+#endif
     g_signal_connect(s->full_screen_item, "activate",
                      G_CALLBACK(gd_menu_full_screen), s);
     g_signal_connect(s->zoom_in_item, "activate",
@@ -1958,6 +1971,11 @@ static GtkWidget *gd_create_menu_view(GtkDisplayState *s)
 
     s->full_screen_item = gtk_menu_item_new_with_mnemonic(_("_Fullscreen"));
 
+#if defined(CONFIG_VTE)
+    s->copy_item = gtk_menu_item_new_with_mnemonic(_("_Copy"));
+    gtk_menu_shell_append(GTK_MENU_SHELL(view_menu), s->copy_item);
+#endif
+
     gtk_accel_group_connect(s->accel_group, GDK_KEY_f, HOTKEY_MODIFIERS, 0,
             g_cclosure_new_swap(G_CALLBACK(gd_accel_full_screen), s, NULL));
 #if GTK_CHECK_VERSION(3, 8, 0)