[gnome-text-editor] window: add tooltip to window title

[Christian Hergert <chergert src gnome org>]

commit 823d2c5f1fa5d70c0525f1c540e589ace4d78eb1
Author: Christian Hergert <chergert redhat com>
Date:   Fri Aug 12 12:14:14 2022 -0700

    window: add tooltip to window title

 src/editor-window.c  | 31 +++++++++++++++++++++++++++++++
 src/editor-window.ui |  4 ++++
 2 files changed, 35 insertions(+)
---
diff --git a/src/editor-window.c b/src/editor-window.c
index 2933128..e0c9516 100644
--- a/src/editor-window.c
+++ b/src/editor-window.c
@@ -759,6 +759,36 @@ on_show_help_overlay_cb (GtkWidget  *widget,
     }
 }
 
+static gboolean
+title_query_tooltip_cb (EditorWindow *self,
+                        int           x,
+                        int           y,
+                        gboolean      keyboard,
+                        GtkTooltip   *tooltip)
+{
+  g_autofree char *text = NULL;
+  EditorDocument *document;
+  EditorPage *page;
+  GFile *file;
+
+  g_assert (EDITOR_IS_WINDOW (self));
+  g_assert (GTK_IS_TOOLTIP (tooltip));
+
+  if (!(page = editor_window_get_visible_page (self)) ||
+      !(document = editor_page_get_document (page)) ||
+      !(file = editor_document_get_file (document)))
+    return FALSE;
+
+  if (g_file_is_native (file))
+    text = g_file_get_path (file);
+  else
+    text = g_file_get_uri (file);
+
+  gtk_tooltip_set_text (tooltip, text);
+
+  return TRUE;
+}
+
 static gboolean
 indicator_to_boolean (GBinding     *binding,
                       const GValue *from_value,
@@ -894,6 +924,7 @@ editor_window_class_init (EditorWindowClass *klass)
   gtk_widget_class_bind_template_callback (widget_class, on_tab_view_close_page_cb);
   gtk_widget_class_bind_template_callback (widget_class, on_tab_view_setup_menu_cb);
   gtk_widget_class_bind_template_callback (widget_class, on_tab_view_create_window_cb);
+  gtk_widget_class_bind_template_callback (widget_class, title_query_tooltip_cb);
 
   gtk_widget_class_install_action (widget_class, "win.alternate-help-overlay", NULL, 
on_show_help_overlay_cb);
   gtk_widget_class_install_action (widget_class, "win.undo-close-page", NULL, on_undo_close_page_cb);
diff --git a/src/editor-window.ui b/src/editor-window.ui
index 4eb375a..a602ec7 100644
--- a/src/editor-window.ui
+++ b/src/editor-window.ui
@@ -22,6 +22,8 @@
                 <child>
                   <object class="GtkCenterBox">
                     <property name="hexpand">true</property>
+                    <property name="has-tooltip">true</property>
+                    <signal name="query-tooltip" handler="title_query_tooltip_cb" object="EditorWindow" 
swapped="true"/>
                     <child type="start">
                       <object class="GtkLabel" id="is_modified">
                         <property name="halign">end</property>
@@ -44,6 +46,8 @@
                 </child>
                 <child>
                   <object class="GtkCenterBox">
+                    <property name="has-tooltip">true</property>
+                    <signal name="query-tooltip" handler="title_query_tooltip_cb" object="EditorWindow" 
swapped="true"/>
                     <child type="start">
                       <object class="GtkImage" id="indicator">
                         <property name="hexpand">true</property>