[gtk/text-node-tweak] textview: Tweak render nodes

[Matthias Clasen <matthiasc src gnome org>]

commit a75c038e09db83277bedae8783dc698a4e934078
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Mar 28 10:59:55 2021 -0400

    textview: Tweak render nodes
    
    Arrange for the contents to be in a single transform
    node that is updated as we scroll. This makes the job
    of the render node differ a lot easier, since it does
    not have to compare to big containers one-by-one.

 gtk/gtktextlayout.c | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/gtk/gtktextlayout.c b/gtk/gtktextlayout.c
index b90e6d12f1..05d9fa9b2a 100644
--- a/gtk/gtktextlayout.c
+++ b/gtk/gtktextlayout.c
@@ -4160,6 +4160,9 @@ gtk_text_layout_snapshot (GtkTextLayout      *layout,
   if (line_list == NULL)
     return; /* nothing on the screen */
 
+  gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (0, offset_y));
+  offset_y = 0;
+
   cursor_snapshot = gtk_snapshot_new ();
 
   crenderer = gsk_pango_renderer_acquire ();