[gitg/wip/albfan/diff-long-lines: 3/3] TextView needs to be wrapped in a scroll view

[Alberto Fanjul <albfan src gnome org>]

commit 17e8d52899d391ce6247a5dc3c705c83320e10c7
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Tue Nov 9 08:05:17 2021 +0100

    TextView needs to be wrapped in a scroll view

 libgitg/gitg-diff-view-file.vala            | 23 +++++++++++++----------
 libgitg/resources/ui/gitg-diff-view-file.ui |  8 ++++++++
 2 files changed, 21 insertions(+), 10 deletions(-)
---
diff --git a/libgitg/gitg-diff-view-file.vala b/libgitg/gitg-diff-view-file.vala
index fc2ae1bd..112085c3 100644
--- a/libgitg/gitg-diff-view-file.vala
+++ b/libgitg/gitg-diff-view-file.vala
@@ -32,36 +32,39 @@ class Gitg.DiffViewFile : Gtk.Grid
        [GtkChild( name = "revealer_content" )]
        private unowned Gtk.Revealer d_revealer_content;
 
+       [GtkChild( name = "scrolled_window" )]
+       private unowned Gtk.ScrolledWindow? scrolled_window;
+
        private bool d_expanded;
 
        private Binding? d_vexpand_binding;
 
+       private DiffViewFileRenderer? _renderer;
+
        public DiffViewFileRenderer? renderer
        {
                owned get
                {
-                       return d_revealer_content.get_child() as DiffViewFileRenderer;
+                       return _renderer;
                }
 
                construct set
                {
-                       var current = this.renderer;
-
-                       if (current != value)
+                       if (_renderer != value)
                        {
+                               if (_renderer != null)
+                                       scrolled_window.remove(_renderer);
+
+                               _renderer = value;
                                if (d_vexpand_binding != null)
                                {
                                        d_vexpand_binding.unbind();
                                        d_vexpand_binding = null;
                                }
 
-                               if (current != null)
-                               {
-                                       d_revealer_content.remove(current);
-                               }
+                               scrolled_window.add (_renderer);
 
-                               d_revealer_content.add(value);
-                               d_vexpand_binding = this.bind_property("vexpand", value, "vexpand", 
BindingFlags.SYNC_CREATE);
+                               d_vexpand_binding = this.bind_property("vexpand", _renderer, "vexpand", 
BindingFlags.SYNC_CREATE);
                        }
                }
        }
diff --git a/libgitg/resources/ui/gitg-diff-view-file.ui b/libgitg/resources/ui/gitg-diff-view-file.ui
index a55a7c5f..3a7aa76b 100644
--- a/libgitg/resources/ui/gitg-diff-view-file.ui
+++ b/libgitg/resources/ui/gitg-diff-view-file.ui
@@ -57,6 +57,14 @@
         <property name="visible">True</property>
         <property name="can_focus">False</property>
         <property name="transition_type">slide-down</property>
+        <child>
+          <object class="GtkScrolledWindow" id="scrolled_window">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="hexpand">True</property>
+            <property name="vexpand">True</property>
+          </object>
+        </child>
       </object>
     </child>
   </template>