[gnome-builder] libide/editor: require formatter for editor.format

[Christian Hergert <chergert src gnome org>]

commit a21881a6e6b7bf1b67eeb04542bbc232094819c5
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 13 16:45:34 2022 -0700

    libide/editor: require formatter for editor.format
    
    This updates the enabled state of page.editor.format based on the
    availability of a formatter from the IdeBuffer.
    
    Fixes #1785

 src/libide/editor/ide-editor-page.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)
---
diff --git a/src/libide/editor/ide-editor-page.c b/src/libide/editor/ide-editor-page.c
index f280dde7c..144dd0ba5 100644
--- a/src/libide/editor/ide-editor-page.c
+++ b/src/libide/editor/ide-editor-page.c
@@ -98,6 +98,23 @@ ide_editor_page_notify_file_cb (IdeEditorPage *self,
                            g_object_ref (self));
 }
 
+static void
+ide_editor_page_notify_formatter_cb (IdeEditorPage *self,
+                                     GParamSpec    *pspec,
+                                     IdeBuffer     *buffer)
+{
+  IdeFormatter *formatter;
+
+  g_assert (IDE_IS_EDITOR_PAGE (self));
+  g_assert (IDE_IS_BUFFER (buffer));
+
+  formatter = ide_buffer_get_formatter (buffer);
+
+  panel_widget_action_set_enabled (PANEL_WIDGET (self),
+                                   "editor.format",
+                                   formatter != NULL);
+}
+
 static void
 ide_editor_page_modified_changed_cb (IdeEditorPage *self,
                                      IdeBuffer     *buffer)
@@ -152,6 +169,12 @@ ide_editor_page_set_buffer (IdeEditorPage *self,
                                self,
                                G_CONNECT_SWAPPED);
 
+      g_signal_connect_object (buffer,
+                               "notify::formatter",
+                               G_CALLBACK (ide_editor_page_notify_formatter_cb),
+                               self,
+                               G_CONNECT_SWAPPED);
+
       g_signal_connect_object (buffer,
                                "notify::file-settings",
                                G_CALLBACK (_ide_editor_page_settings_reload),
@@ -169,6 +192,7 @@ ide_editor_page_set_buffer (IdeEditorPage *self,
                               G_BINDING_SYNC_CREATE);
 
       ide_editor_page_notify_file_cb (self, NULL, buffer);
+      ide_editor_page_notify_formatter_cb (self, NULL, buffer);
       ide_editor_page_modified_changed_cb (self, buffer);
       _ide_editor_page_settings_init (self);
     }