[file-roller/wip/jtojnar/gtk4] wip: Correct return values of signal handlers




commit 1518f651c74e24ed93a3161c5135e10c5a425279
Author: Jan Tojnar <jtojnar gmail com>
Date:   Tue Dec 21 04:42:49 2021 +0100

    wip: Correct return values of signal handlers
    
    I verified using the following semantic patch that there are no signals that return a value in File 
Roller, and very little in GLib and GTK: 
https://gitlab.gnome.org/jtojnar/glib-refactoring/-/blob/5d70945511ce1f924f2f3eae59cb382bf39caeb7/patches/find-non-void-signals.cocci
    
    Then I ran this semantic patch to set return values of all handlers to void:
    
https://gitlab.gnome.org/jtojnar/glib-refactoring/-/blob/d0451e42055daef4de72354f110256aeab8dfd89/patches/voidize-signal-handlers.cocci
    
    ⚠ Still need to verify with Tartan that there were no false positives.

 src/eggtreemultidnd.c         |  22 +++---
 src/fr-application.c          |   4 +-
 src/fr-command.c              |   4 +-
 src/fr-file-selector-dialog.c |   6 +-
 src/fr-window.c               | 152 +++++++++++++++++++++---------------------
 5 files changed, 93 insertions(+), 95 deletions(-)
---
diff --git a/src/eggtreemultidnd.c b/src/eggtreemultidnd.c
index 3c43cb2c..7cb2a2d8 100644
--- a/src/eggtreemultidnd.c
+++ b/src/eggtreemultidnd.c
@@ -165,7 +165,7 @@ stop_drag_check (GtkWidget *widget)
 }
 
 
-static gboolean
+static void
 egg_tree_multi_drag_button_release_event (GtkWidget      *widget,
                                          GdkEventButton *event,
                                          gpointer        data)
@@ -175,7 +175,7 @@ egg_tree_multi_drag_button_release_event (GtkWidget      *widget,
 
   priv_data = g_object_get_data (G_OBJECT (widget), EGG_TREE_MULTI_DND_STRING);
   if (priv_data == NULL)
-    return FALSE;
+    return;
 
   priv_data->button_released = TRUE;
 
@@ -184,7 +184,7 @@ egg_tree_multi_drag_button_release_event (GtkWidget      *widget,
 
   stop_drag_check (widget);
 
-  return FALSE;
+  return;
 }
 
 
@@ -429,7 +429,7 @@ egg_tree_multi_drag_motion_event (GtkWidget      *widget,
 }
 
 
-static gboolean
+static void
 egg_tree_multi_drag_button_press_event (GtkWidget      *widget,
                                        GdkEventButton *event,
                                        gpointer        data)
@@ -442,10 +442,10 @@ egg_tree_multi_drag_button_press_event (GtkWidget      *widget,
   EggTreeMultiDndData *priv_data;
 
   if (event->window != gtk_tree_view_get_bin_window (GTK_TREE_VIEW (widget)))
-    return FALSE;
+    return;
 
   if (event->button == 3)
-    return FALSE;
+    return;
 
   tree_view = GTK_TREE_VIEW (widget);
   priv_data = g_object_get_data (G_OBJECT (tree_view), EGG_TREE_MULTI_DND_STRING);
@@ -459,18 +459,18 @@ egg_tree_multi_drag_button_press_event (GtkWidget      *widget,
     }
 
   if (g_slist_find (priv_data->event_list, event))
-    return FALSE;
+    return;
 
   if (priv_data->pending_event)
     {
       /* save the event to be propagated in order */
       priv_data->event_list = g_slist_append (priv_data->event_list,
                                              gdk_event_copy ((GdkEvent*)event));
-      return TRUE;
+      return;
     }
 
   if (event->type == GDK_2BUTTON_PRESS)
-    return FALSE;
+    return;
 
   gtk_tree_view_get_path_at_pos (tree_view,
                                 event->x, event->y,
@@ -523,10 +523,10 @@ egg_tree_multi_drag_button_press_event (GtkWidget      *widget,
       priv_data->button_released = FALSE;
       gtk_tree_path_free (path);
       /* We called the default handler so we don't let the default handler run */
-      return TRUE;
+      return;
     }
 
-  return FALSE;
+  return;
 }
 
 
diff --git a/src/fr-application.c b/src/fr-application.c
index 2721955b..104b13b8 100644
--- a/src/fr-application.c
+++ b/src/fr-application.c
@@ -133,7 +133,7 @@ window_ready_cb (GtkWidget *widget,
 }
 
 
-static gboolean
+static void
 window_progress_cb (FrWindow *window,
                    double    fraction,
                    char     *details,
@@ -151,7 +151,7 @@ window_progress_cb (FrWindow *window,
                                                      details),
                                       NULL);
 
-       return TRUE;
+       return;
 }
 
 
diff --git a/src/fr-command.c b/src/fr-command.c
index 1a271554..377130ce 100644
--- a/src/fr-command.c
+++ b/src/fr-command.c
@@ -385,14 +385,14 @@ fr_command_handle_process_error (FrCommand     *self,
 /* -- _fr_command_set_process -- */
 
 
-static gboolean
+static void
 process_sticky_only_cb (FrProcess *process,
                         gpointer   user_data)
 {
        FrArchive *archive = user_data;
 
        fr_archive_set_stoppable (archive, FALSE);
-        return TRUE;
+        return;
 }
 
 
diff --git a/src/fr-file-selector-dialog.c b/src/fr-file-selector-dialog.c
index c99df840..5bd4afbb 100644
--- a/src/fr-file-selector-dialog.c
+++ b/src/fr-file-selector-dialog.c
@@ -571,7 +571,7 @@ places_sidebar_open_location_cb (GtkPlacesSidebar  *sidebar,
 }
 
 
-static gboolean
+static void
 files_treeview_button_press_event_cb (GtkWidget      *widget,
                                      GdkEventButton *event,
                                      gpointer        user_data)
@@ -584,10 +584,10 @@ files_treeview_button_press_event_cb (GtkWidget      *widget,
                gtk_tree_view_convert_bin_window_to_widget_coords (GTK_TREE_VIEW (widget), event->x, 
event->y, &wx, &wy);
                _gtk_popover_popup_at_position (self->file_context_menu, wx, wy);
 
-               return TRUE;
+               return;
        }
 
-       return FALSE;
+       return;
 }
 
 
diff --git a/src/fr-window.c b/src/fr-window.c
index a6b36aaa..a63c39c0 100644
--- a/src/fr-window.c
+++ b/src/fr-window.c
@@ -2100,7 +2100,7 @@ close_progress_dialog (FrWindow *window,
 }
 
 
-static gboolean
+static void
 progress_dialog_delete_event (GtkWidget *caller,
                              GdkEvent  *event,
                              FrWindow  *window)
@@ -2110,7 +2110,7 @@ progress_dialog_delete_event (GtkWidget *caller,
                close_progress_dialog (window, TRUE);
        }
 
-       return TRUE;
+       return;
 }
 
 
@@ -2441,7 +2441,7 @@ progress_dialog_update_action_description (FrWindow *window)
 }
 
 
-static gboolean
+static void
 fr_window_working_archive_cb (FrArchive  *archive,
                              const char *archive_uri,
                              FrWindow   *window)
@@ -2451,11 +2451,11 @@ fr_window_working_archive_cb (FrArchive  *archive,
                window->priv->working_archive = g_file_new_for_uri (archive_uri);
        progress_dialog_update_action_description (window);
 
-       return TRUE;
+       return;
 }
 
 
-static gboolean
+static void
 fr_archive_message_cb (FrArchive  *archive,
                       const char *msg,
                       FrWindow   *window)
@@ -2466,7 +2466,7 @@ fr_archive_message_cb (FrArchive  *archive,
        }
 
        if (window->priv->progress_dialog == NULL)
-               return TRUE;
+               return;
 
        if (msg != NULL) {
                while (*msg == ' ')
@@ -2483,7 +2483,7 @@ fr_archive_message_cb (FrArchive  *archive,
                else
                        utf8_msg = g_strdup (msg);
                if (utf8_msg == NULL)
-                       return TRUE;
+                       return;
 
                if (g_utf8_validate (utf8_msg, -1, NULL)) {
                        gtk_label_set_text (GTK_LABEL (window->priv->pd_message), utf8_msg);
@@ -2510,7 +2510,7 @@ fr_archive_message_cb (FrArchive  *archive,
 
        progress_dialog_update_action_description (window);
 
-       return TRUE;
+       return;
 }
 
 
@@ -2654,7 +2654,7 @@ open_progress_dialog (FrWindow *window,
 }
 
 
-static gboolean
+static void
 fr_archive_progress_cb (FrArchive *archive,
                        double     fraction,
                        FrWindow  *window)
@@ -2710,7 +2710,7 @@ fr_archive_progress_cb (FrArchive *archive,
                g_print ("progress > %2.2f\n", fraction);
 #endif
        }
-       return TRUE;
+       return;
 }
 
 
@@ -2763,13 +2763,13 @@ confirmation_dialog_response (GtkDialog *dialog,
 }
 
 
-static gboolean
+static void
 confirmation_dialog_delete_event (GtkWidget *dialog,
                                  GdkEvent  *event,
                                  FrWindow  *window)
 {
        fr_window_close_confirmation_dialog (window, GTK_DIALOG (dialog));
-       return TRUE;
+       return;
 }
 
 
@@ -3575,7 +3575,7 @@ fr_window_get_n_selected_files (FrWindow *window)
 /**/
 
 
-static int
+static void
 dir_tree_button_press_cb (GtkWidget      *widget,
                          GdkEventButton *event,
                          gpointer        data)
@@ -3584,11 +3584,11 @@ dir_tree_button_press_cb (GtkWidget      *widget,
        GtkTreeSelection *selection;
 
        if (event->window != gtk_tree_view_get_bin_window (GTK_TREE_VIEW (window->priv->tree_view)))
-               return FALSE;
+               return;
 
        selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (window->priv->tree_view));
        if (selection == NULL)
-               return FALSE;
+               return;
 
        if ((event->type == GDK_BUTTON_PRESS) && (event->button == 3)) {
                GtkTreePath *path;
@@ -3602,7 +3602,7 @@ dir_tree_button_press_cb (GtkWidget      *widget,
 
                        if (! gtk_tree_model_get_iter (GTK_TREE_MODEL (window->priv->tree_store), &iter, 
path)) {
                                gtk_tree_path_free (path);
-                               return FALSE;
+                               return;
                        }
                        gtk_tree_path_free (path);
 
@@ -3617,18 +3617,18 @@ dir_tree_button_press_cb (GtkWidget      *widget,
                else
                        gtk_tree_selection_unselect_all (selection);
 
-               return TRUE;
+               return;
        }
        else if ((event->type == GDK_BUTTON_PRESS) && (event->button == 8)) {
                fr_window_go_back (window);
-               return TRUE;
+               return;
        }
        else if ((event->type == GDK_BUTTON_PRESS) && (event->button == 9)) {
                fr_window_go_forward (window);
-               return TRUE;
+               return;
        }
 
-       return FALSE;
+       return;
 }
 
 
@@ -3717,7 +3717,7 @@ fr_window_current_folder_activated (FrWindow *window,
 }
 
 
-static gboolean
+static void
 row_activated_cb (GtkTreeView       *tree_view,
                  GtkTreePath       *path,
                  GtkTreeViewColumn *column,
@@ -3730,7 +3730,7 @@ row_activated_cb (GtkTreeView       *tree_view,
        if (! gtk_tree_model_get_iter (GTK_TREE_MODEL (window->priv->list_store),
                                       &iter,
                                       path))
-               return FALSE;
+               return;
 
        gtk_tree_model_get (GTK_TREE_MODEL (window->priv->list_store), &iter,
                            COLUMN_FILE_DATA, &fdata,
@@ -3751,11 +3751,11 @@ row_activated_cb (GtkTreeView       *tree_view,
                g_free (new_dir);
        }
 
-       return FALSE;
+       return;
 }
 
 
-static int
+static void
 file_button_press_cb (GtkWidget      *widget,
                      GdkEventButton *event,
                      gpointer        data)
@@ -3764,11 +3764,11 @@ file_button_press_cb (GtkWidget      *widget,
        GtkTreeSelection *selection;
 
        if (event->window != gtk_tree_view_get_bin_window (GTK_TREE_VIEW (window->priv->list_view)))
-               return FALSE;
+               return;
 
        selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (window->priv->list_view));
        if (selection == NULL)
-               return FALSE;
+               return;
 
        if (window->priv->path_clicked != NULL) {
                gtk_tree_path_free (window->priv->path_clicked);
@@ -3788,7 +3788,7 @@ file_button_press_cb (GtkWidget      *widget,
 
                        if (! gtk_tree_model_get_iter (GTK_TREE_MODEL (window->priv->list_store), &iter, 
path)) {
                                gtk_tree_path_free (path);
-                               return FALSE;
+                               return;
                        }
                        gtk_tree_path_free (path);
 
@@ -3806,7 +3806,7 @@ file_button_press_cb (GtkWidget      *widget,
                        _gtk_popover_popup_at_position (GTK_POPOVER (window->priv->folder_popup_menu), wx, 
wy);
                else
                        _gtk_popover_popup_at_position (GTK_POPOVER (window->priv->file_popup_menu), wx, wy);
-               return TRUE;
+               return;
        }
        else if ((event->type == GDK_BUTTON_PRESS) && (event->button == 1)) {
                GtkTreePath *path = NULL;
@@ -3827,24 +3827,24 @@ file_button_press_cb (GtkWidget      *widget,
                        gtk_tree_path_free (path);
                }
 
-               return FALSE;
+               return;
        }
        else if ((event->type == GDK_BUTTON_PRESS) && (event->button == 8)) {
                // go back
                fr_window_go_back (window);
-               return TRUE;
+               return;
        }
        else if ((event->type == GDK_BUTTON_PRESS) && (event->button == 9)) {
                // go forward
                fr_window_go_forward (window);
-               return TRUE;
+               return;
        }
 
-       return FALSE;
+       return;
 }
 
 
-static int
+static void
 file_button_release_cb (GtkWidget      *widget,
                        GdkEventButton *event,
                        gpointer        data)
@@ -3853,14 +3853,14 @@ file_button_release_cb (GtkWidget      *widget,
        GtkTreeSelection *selection;
 
        if (event->window != gtk_tree_view_get_bin_window (GTK_TREE_VIEW (window->priv->list_view)))
-               return FALSE;
+               return;
 
        selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (window->priv->list_view));
        if (selection == NULL)
-               return FALSE;
+               return;
 
        if (window->priv->path_clicked == NULL)
-               return FALSE;
+               return;
 
        if ((event->type == GDK_BUTTON_RELEASE)
            && (event->button == 1)
@@ -3893,11 +3893,11 @@ file_button_release_cb (GtkWidget      *widget,
                window->priv->path_clicked = NULL;
        }
 
-       return FALSE;
+       return;
 }
 
 
-static gboolean
+static void
 file_motion_notify_callback (GtkWidget *widget,
                             GdkEventMotion *event,
                             gpointer user_data)
@@ -3908,10 +3908,10 @@ file_motion_notify_callback (GtkWidget *widget,
        GtkTreeIter  iter;
 
        if (! window->priv->single_click)
-               return FALSE;
+               return;
 
        if (event->window != gtk_tree_view_get_bin_window (GTK_TREE_VIEW (window->priv->list_view)))
-               return FALSE;
+               return;
 
        last_hover_path = window->priv->list_hover_path;
 
@@ -3953,11 +3953,11 @@ file_motion_notify_callback (GtkWidget *widget,
 
        gtk_tree_path_free (last_hover_path);
 
-       return FALSE;
+       return;
 }
 
 
-static gboolean
+static void
 file_leave_notify_callback (GtkWidget *widget,
                            GdkEventCrossing *event,
                            gpointer user_data)
@@ -3977,7 +3977,7 @@ file_leave_notify_callback (GtkWidget *widget,
                window->priv->list_hover_path = NULL;
        }
 
-       return FALSE;
+       return;
 }
 
 
@@ -4003,7 +4003,7 @@ get_file_list_from_selection_data (char *uri_list)
 }
 
 
-static gboolean
+static void
 fr_window_drag_motion (GtkWidget      *widget,
                       GdkDragContext *context,
                       gint            x,
@@ -4017,10 +4017,10 @@ fr_window_drag_motion (GtkWidget      *widget,
            || (gtk_drag_get_source_widget (context) == window->priv->tree_view))
        {
                gdk_drag_status (context, 0, time);
-               return FALSE;
+               return;
        }
 
-       return TRUE;
+       return;
 }
 
 
@@ -4367,31 +4367,29 @@ tree_view_drag_begin (GtkWidget          *widget,
 }
 
 
-static gboolean
+static void
 file_list_drag_begin (GtkWidget          *widget,
                      GdkDragContext     *context,
                      gpointer            data)
 {
        FrWindow *window = data;
-       return tree_view_drag_begin (widget,
-                                    context,
-                                    GTK_TREE_MODEL (window->priv->list_store),
-                                    COLUMN_NAME,
-                                    data);
+       tree_view_drag_begin(widget, context,
+                            GTK_TREE_MODEL(window->priv->list_store),
+                            COLUMN_NAME, data);
+       return;
 }
 
 
-static gboolean
+static void
 folde_tree_drag_begin (GtkWidget          *widget,
                       GdkDragContext     *context,
                       gpointer            data)
 {
        FrWindow *window = data;
-       return tree_view_drag_begin (widget,
-                                    context,
-                                    GTK_TREE_MODEL (window->priv->tree_store),
-                                    TREE_COLUMN_NAME,
-                                    data);
+       tree_view_drag_begin(widget, context,
+                            GTK_TREE_MODEL(window->priv->tree_store),
+                            TREE_COLUMN_NAME, data);
+       return;
 }
 
 
@@ -4572,7 +4570,7 @@ wait_dnd_extraction (FrWindow *window)
 }
 
 
-static gboolean
+static void
 fr_window_folder_tree_drag_data_get (GtkWidget        *widget,
                                     GdkDragContext   *context,
                                     GtkSelectionData *selection_data,
@@ -4590,11 +4588,11 @@ fr_window_folder_tree_drag_data_get (GtkWidget        *widget,
        debug (DEBUG_INFO, "::DragDataGet -->\n");
 
        if (window->priv->activity_ref > 0)
-               return FALSE;
+               return;
 
        file_list = fr_window_get_folder_tree_selection (window, TRUE, NULL);
        if (file_list == NULL)
-               return FALSE;
+               return;
 
        if (gtk_selection_data_get_target (selection_data) == XFR_ATOM) {
                FrClipboardData *tmp;
@@ -4611,14 +4609,14 @@ fr_window_folder_tree_drag_data_get (GtkWidget        *widget,
                fr_clipboard_data_unref (tmp);
                g_free (data);
 
-               return TRUE;
+               return;
        }
 
        if (! nautilus_xds_dnd_is_valid_xds_context (context))
-               return FALSE;
+               return;
 
        uri  = get_xds_atom_value (context);
-       g_return_val_if_fail (uri != NULL, FALSE);
+       g_return_if_fail(uri != NULL);
 
        destination = g_file_new_for_uri (uri);
        destination_folder = g_file_get_parent (destination);
@@ -4667,7 +4665,7 @@ fr_window_folder_tree_drag_data_get (GtkWidget        *widget,
 
        debug (DEBUG_INFO, "::DragDataGet <--\n");
 
-       return TRUE;
+       return;
 }
 
 
@@ -4890,7 +4888,7 @@ key_press_cb (GtkWidget   *widget,
 }
 
 
-static gboolean
+static void
 dir_tree_selection_changed_cb (GtkTreeSelection *selection,
                               gpointer          user_data)
 {
@@ -4908,11 +4906,11 @@ dir_tree_selection_changed_cb (GtkTreeSelection *selection,
                g_free (path);
        }
 
-       return FALSE;
+       return;
 }
 
 
-static gboolean
+static void
 selection_changed_cb (GtkTreeSelection *selection,
                      gpointer          user_data)
 {
@@ -4920,17 +4918,17 @@ selection_changed_cb (GtkTreeSelection *selection,
 
        fr_window_update_sensitivity (window);
 
-       return FALSE;
+       return;
 }
 
 
-static gboolean
+static void
 fr_window_delete_event_cb (GtkWidget *caller,
                           GdkEvent  *event,
                           FrWindow  *window)
 {
        fr_window_close (window);
-       return TRUE;
+       return;
 }
 
 
@@ -5292,7 +5290,7 @@ path_column_sort_func (GtkTreeModel *model,
 }
 
 
-static gboolean
+static void
 fr_window_show_cb (GtkWidget *widget,
                   FrWindow  *window)
 {
@@ -5303,7 +5301,7 @@ fr_window_show_cb (GtkWidget *widget,
 
        gtk_widget_hide (window->priv->filter_bar);
 
-       return TRUE;
+       return;
 }
 
 
@@ -5376,7 +5374,7 @@ theme_changed_cb (GtkIconTheme *theme,
 }
 
 
-static gboolean
+static void
 fr_archive_stoppable_cb (FrArchive *archive,
                         gboolean   stoppable,
                         FrWindow  *window)
@@ -5386,7 +5384,7 @@ fr_archive_stoppable_cb (FrArchive *archive,
                gtk_dialog_set_response_sensitive (GTK_DIALOG (window->priv->progress_dialog),
                                                   GTK_RESPONSE_OK,
                                                   stoppable);
-       return TRUE;
+       return;
 }
 
 
@@ -8038,12 +8036,12 @@ fr_window_archive_encrypt (FrWindow   *window,
 /* -- fr_window_view_last_output  -- */
 
 
-static gboolean
+static void
 last_output_window__unrealize_cb (GtkWidget  *widget,
                                  gpointer    data)
 {
        pref_util_save_window_geometry (GTK_WINDOW (widget), LAST_OUTPUT_SCHEMA_NAME);
-       return FALSE;
+       return;
 }
 
 


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