window-slot: Handle file activation on FileChooser

The view handles activation through mime-actions.c functions, which
allow, among other things, opening files in other apps.

We don't want that in the FileChooser modes. Opening folders is okay,
but what we want to do when double-clicking a file depends on the
exact mode and the filters that apply.

Prepare to handle activation at a higher lever: the expected action
will be implemented by the upcoming NautilusFileChooser, by handling
the new NautilusWindowSlot::activate-files signal.

src/nautilus-files-view.c

@@ -1311,7 +1311,13 @@ nautilus_files_view_activate_files (NautilusFilesView *view,
                                     NautilusOpenFlags  flags,
                                     gboolean           confirm_multiple)
 {
-    NautilusFilesViewPrivate *priv;
+    NautilusFilesViewPrivate *priv = nautilus_files_view_get_instance_private (view);
+
+    if (nautilus_window_slot_handle_activate_files (priv->slot, files))
+    {
+        return;
+    }
+
     GList *files_to_extract;
     GList *files_to_activate;
     char *path;
@@ -1321,8 +1327,6 @@ nautilus_files_view_activate_files (NautilusFilesView *view,
         return;
     }
 
-    priv = nautilus_files_view_get_instance_private (view);
-
     files_to_extract = nautilus_file_list_filter (files,
                                                   &files_to_activate,
                                                   (NautilusFileFilterFunc) nautilus_mime_file_extracts,

src/nautilus-window-slot.c

@@ -67,6 +67,16 @@ enum
     NUM_PROPERTIES
 };
 
+static GParamSpec *properties[NUM_PROPERTIES];
+
+enum
+{
+    SIGNAL_ACTIVATE_FILES,
+    LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
+
 struct _NautilusWindowSlot
 {
     AdwBin parent_instance;
@@ -150,8 +160,6 @@ struct _NautilusWindowSlot
 
 G_DEFINE_TYPE (NautilusWindowSlot, nautilus_window_slot, ADW_TYPE_BIN);
 
-static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
-
 static const GtkPadActionEntry pad_actions[] =
 {
     { GTK_PAD_ACTION_BUTTON, 3, -1, N_("Parent folder"), "up" },
@@ -567,6 +575,27 @@ nautilus_window_slot_search (NautilusWindowSlot *self,
     }
 }
 
+gboolean
+nautilus_window_slot_handle_activate_files (NautilusWindowSlot *self,
+                                            GList              *files)
+{
+    if (self->mode == NAUTILUS_MODE_BROWSE)
+    {
+        return FALSE;
+    }
+
+    if (files != NULL && files->next == NULL &&
+        nautilus_file_opens_in_view (NAUTILUS_FILE (files->data)))
+    {
+        /* Single folder or folder-like item is always handled by the view. */
+        return FALSE;
+    }
+
+    g_signal_emit (self, signals[SIGNAL_ACTIVATE_FILES], 0, files);
+
+    return TRUE;
+}
+
 gboolean
 nautilus_window_slot_handle_event (NautilusWindowSlot    *self,
                                    GtkEventControllerKey *controller,
@@ -2997,6 +3026,12 @@ nautilus_window_slot_class_init (NautilusWindowSlotClass *klass)
                              G_PARAM_READABLE | G_PARAM_STATIC_STRINGS);
 
     g_object_class_install_properties (oclass, NUM_PROPERTIES, properties);
+
+    signals[SIGNAL_ACTIVATE_FILES] = g_signal_new ("activate-files",
+                                                   G_TYPE_FROM_CLASS (oclass),
+                                                   G_SIGNAL_RUN_LAST, 0, NULL, NULL,
+                                                   g_cclosure_marshal_VOID__POINTER,
+                                                   G_TYPE_NONE, 1, G_TYPE_POINTER);
 }
 
 GFile *

src/nautilus-window-slot.h

@@ -71,6 +71,8 @@ void     nautilus_window_slot_stop_loading                 (NautilusWindowSlot *
 const gchar *nautilus_window_slot_get_title                (NautilusWindowSlot *slot);
 void         nautilus_window_slot_update_title		   (NautilusWindowSlot *slot);
 
+gboolean nautilus_window_slot_handle_activate_files        (NautilusWindowSlot *slot,
+                                                            GList              *files);
 gboolean nautilus_window_slot_handle_event       	   (NautilusWindowSlot    *slot,
 							    GtkEventControllerKey *controller,
 							    guint                  keyval,