usage: Port "Clear File History?" to AdwAlertDialog

Also:
- Move the dialog to the .ui file, as this dialog is UI-related
- Don't destroy/force close the dialog, as it will be closed
automatically after the responses are triggered

panels/privacy/usage/cc-usage-page.c

@@ -33,6 +33,7 @@ struct _CcUsagePage
 
   AdwSwitchRow *recently_used_row;
   AdwComboRow *retain_history_combo;
+  AdwDialog   *clear_file_history_dialog;
 
   AdwSwitchRow   *purge_trash_row;
   AdwSwitchRow   *purge_temp_row;
@@ -323,31 +324,9 @@ cc_usage_page_init (CcUsagePage *self)
 }
 
 static void
-on_clear_recent_warning_response_cb (GtkDialog   *dialog,
+on_clear_history_response_cb (void)
-                                     gint         response,
-                                     CcUsagePage *self)
 {
-  if (response == GTK_RESPONSE_OK)
+  gtk_recent_manager_purge_items (gtk_recent_manager_get_default (), NULL);
-    gtk_recent_manager_purge_items (gtk_recent_manager_get_default (), NULL);
-
-  gtk_window_destroy (GTK_WINDOW (dialog));
-}
-
-static void
-clear_recent (CcUsagePage *self)
-{
-  GtkDialog *dialog;
-
-  dialog = run_warning (self,
-                        _("Clear File History?"),
-                        _("After clearing, lists of recently used files will appear empty."),
-                        _("Clear _History"));
-
-  g_signal_connect_object (dialog,
-                           "response",
-                           G_CALLBACK (on_clear_recent_warning_response_cb),
-                           self,
-                           0);
 }
 
 static void
@@ -361,6 +340,7 @@ cc_usage_page_class_init (CcUsagePageClass *klass)
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/control-center/privacy/usage/cc-usage-page.ui");
 
   gtk_widget_class_bind_template_child (widget_class, CcUsagePage, purge_after_combo);
+  gtk_widget_class_bind_template_child (widget_class, CcUsagePage, clear_file_history_dialog);
   gtk_widget_class_bind_template_child (widget_class, CcUsagePage, purge_temp_row);
   gtk_widget_class_bind_template_child (widget_class, CcUsagePage, purge_trash_button);
   gtk_widget_class_bind_template_child (widget_class, CcUsagePage, purge_trash_row);
@@ -368,7 +348,7 @@ cc_usage_page_class_init (CcUsagePageClass *klass)
   gtk_widget_class_bind_template_child (widget_class, CcUsagePage, recently_used_row);
   gtk_widget_class_bind_template_child (widget_class, CcUsagePage, retain_history_combo);
 
-  gtk_widget_class_bind_template_callback (widget_class, clear_recent);
+  gtk_widget_class_bind_template_callback (widget_class, on_clear_history_response_cb);
   gtk_widget_class_bind_template_callback (widget_class, retain_history_name_cb);
   gtk_widget_class_bind_template_callback (widget_class, retain_history_combo_changed_cb);
   gtk_widget_class_bind_template_callback (widget_class, purge_after_name_cb);

panels/privacy/usage/cc-usage-page.ui

@@ -48,7 +48,7 @@
                         <property name="label" translatable="yes">_Clear History…</property>
                         <property name="can-shrink">True</property>
                         <property name="use_underline">1</property>
-                        <signal name="clicked" handler="clear_recent" swapped="yes"/>
+                        <signal name="clicked" handler="adw_dialog_present" object="clear_file_history_dialog"/>
                         <style>
                           <class name="destructive-action"/>
                         </style>
@@ -129,4 +129,15 @@
       </object>
     </property>
   </template>
+  <object class="AdwAlertDialog" id="clear_file_history_dialog">
+    <property name="heading" translatable="yes">Clear File History?</property>
+    <property name="body" translatable="yes">After clearing, lists of recently used files will appear empty.</property>
+    <property name="default-response">cancel</property>
+    <property name="close-response">cancel</property>
+    <signal name="response::clear-history" handler="on_clear_history_response_cb"/>
+    <responses>
+      <response id="cancel" translatable="yes">_Cancel</response>
+      <response id="clear-history" translatable="yes" appearance="destructive">Clear _History</response>
+    </responses>
+  </object>
 </interface>