[gtk/ebassi/a11y-text-extents] a11y: Transform GetCharacterExtents coords to native surface ones

[Carlos Garnacho <carlosg src gnome org>]

commit e895f7dd7018e1af3f238c7f4fd0bd5f1fafe1df
Author: Carlos Garnacho <carlosg gnome org>
Date:   Thu Jun 2 14:32:41 2022 +0200

    a11y: Transform GetCharacterExtents coords to native surface ones
    
    These coordinates are "window"-relative, so transform textview coordinates
    to the coordinate system of the GtkNative containing it.

 gtk/a11y/gtkatspitext.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/gtk/a11y/gtkatspitext.c b/gtk/a11y/gtkatspitext.c
index 5bac320813..e4a6140298 100644
--- a/gtk/a11y/gtkatspitext.c
+++ b/gtk/a11y/gtkatspitext.c
@@ -1126,6 +1126,13 @@ text_view_handle_method (GDBusConnection       *connection,
                                              rect.x, rect.y,
                                              &x, &y);
 
+      double dx, dy;
+      gtk_widget_translate_coordinates (widget,
+                                        GTK_WIDGET (gtk_widget_get_native (widget)),
+                                        (double) x, (double) y, &dx, &dy);
+      x = floor (dx);
+      y = floor (dy);
+
       g_dbus_method_invocation_return_value (invocation,
                                              g_variant_new ("(iiii)",
                                                             x,