[libpanel/wip/chergert/fix-14] save-dialog: add discard signal

[Christian Hergert <chergert src gnome org>]

commit 4f01c4eab0dc9216b2ab107ecff39058b94fd127
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 13 10:33:46 2022 -0700

    save-dialog: add discard signal
    
    Implementations are encouraged to use this to rollback changes and/or close
    the page represented by the save delegate.

 src/panel-save-delegate.c | 28 ++++++++++++++++++++++++++++
 src/panel-save-delegate.h |  3 +++
 src/panel-save-dialog.c   |  9 ++++++++-
 3 files changed, 39 insertions(+), 1 deletion(-)
---
diff --git a/src/panel-save-delegate.c b/src/panel-save-delegate.c
index 8e4998d..1821ac7 100644
--- a/src/panel-save-delegate.c
+++ b/src/panel-save-delegate.c
@@ -47,6 +47,7 @@ enum {
 };
 
 enum {
+  DISCARD,
   SAVE,
   N_SIGNALS
 };
@@ -328,6 +329,25 @@ panel_save_delegate_class_init (PanelSaveDelegateClass *klass)
                                  g_signal_accumulator_true_handled, NULL,
                                  NULL,
                                  G_TYPE_BOOLEAN, 1, G_TYPE_TASK);
+
+  /**
+   * PanelSaveDelegate::discard:
+   * @self: a #PanelSaveDelegate
+   *
+   * This signal is emitted when the user has requested that the
+   * delegate discard the changes instead of saving them.
+   *
+   * Implementations are encouraged to connect to this signal (or
+   * implement the virtual method) and revert the document to the
+   * last saved state and/or close the document.
+   */
+  signals [DISCARD] = g_signal_new ("discard",
+                                    G_TYPE_FROM_CLASS (klass),
+                                    G_SIGNAL_RUN_LAST,
+                                    G_STRUCT_OFFSET (PanelSaveDelegateClass, discard),
+                                    NULL, NULL,
+                                    NULL,
+                                    G_TYPE_NONE, 0);
 }
 
 static void
@@ -572,3 +592,11 @@ panel_save_delegate_set_is_draft (PanelSaveDelegate *self,
       g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_IS_DRAFT]);
     }
 }
+
+void
+panel_save_delegate_discard (PanelSaveDelegate *self)
+{
+  g_return_if_fail (PANEL_IS_SAVE_DELEGATE (self));
+
+  g_signal_emit (self, signals [DISCARD], 0);
+}
diff --git a/src/panel-save-delegate.h b/src/panel-save-delegate.h
index 83b5cc7..2a5d2a3 100644
--- a/src/panel-save-delegate.h
+++ b/src/panel-save-delegate.h
@@ -44,6 +44,7 @@ struct _PanelSaveDelegateClass
                            GError            **error);
   gboolean (*save)        (PanelSaveDelegate  *self,
                            GTask              *task);
+  void     (*discard)     (PanelSaveDelegate  *self);
 
   /*< private >*/
   gpointer _reserved[8];
@@ -90,5 +91,7 @@ PANEL_AVAILABLE_IN_ALL
 gboolean           panel_save_delegate_save_finish   (PanelSaveDelegate    *self,
                                                       GAsyncResult         *result,
                                                       GError              **error);
+PANEL_AVAILABLE_IN_ALL
+void               panel_save_delegate_discard       (PanelSaveDelegate    *self);
 
 G_END_DECLS
diff --git a/src/panel-save-dialog.c b/src/panel-save-dialog.c
index 39398dc..d795df7 100644
--- a/src/panel-save-dialog.c
+++ b/src/panel-save-dialog.c
@@ -80,7 +80,14 @@ panel_save_dialog_response_discard_cb (PanelSaveDialog *self,
 
   task = g_steal_pointer (&self->task);
 
-  /* TODO: Discard widgets */
+  for (guint i = 0; i < self->rows->len; i++)
+    {
+      PanelSaveDialogRow *row = g_ptr_array_index (self->rows, i);
+      PanelSaveDelegate *delegate = panel_save_dialog_row_get_delegate (row);
+
+      panel_save_delegate_discard (delegate);
+    }
+
   g_task_return_boolean (task, TRUE);
 
   gtk_window_destroy (GTK_WINDOW (self));