textview: Don't leave embedded children behind

When scrolling embedded widgets out of view,
they sometimes get left behind because we don't
reallocated them. To avoid that, move _all_ children
out of view in size_allocate, and let the current
child allocation plumbing move the visible ones
back in place.

1 files changed, 11 insertions, 0 deletions

diff --git a/gtk/gtktextview.c b/gtk/gtktextview.c
index 340d12b2d9..db23e9ad86 100644
--- a/gtk/gtktextview.c
+++ b/gtk/gtktextview.c
@@ -4409,6 +4409,8 @@ gtk_text_view_allocate_children (GtkTextView *text_view)
     {
       const AnchoredChild *child = iter->data;
       GtkTextIter child_loc;
+      GtkRequisition child_req;
+      GtkAllocation allocation;
 
       /* We need to force-validate the regions containing children. */
       gtk_text_buffer_get_iter_at_child_anchor (get_buffer (text_view),
@@ -4429,6 +4431,15 @@ gtk_text_view_allocate_children (GtkTextView *text_view)
         }
 
       gtk_text_layout_validate_yrange (priv->layout, &child_loc, 0, 1);
+
+      gtk_widget_get_preferred_size (child->widget, &child_req, NULL);
+
+      allocation.x = - child_req.width;
+      allocation.y = - child_req.height;
+      allocation.width = child_req.width;
+      allocation.height = child_req.height;
+
+      gtk_widget_size_allocate (child->widget, &allocation, -1);
     }
 }