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.

diff --git a/gtk/gtktextlayout.c b/gtk/gtktextlayout.c
index b90e6d12f1e921ff4bacd8018140921e3f489b81..05d9fa9b2a897c3a5259141083d0bc3c617b78a8 100644 (file)
--- 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 ();