Revert part of "textview: Remove extra magic for drawing children"

This partially reverts commit df37446f9b.
The commit changed API that was public (or at least semi-public) and
it's not worth changing that.

The original bug should still be fixed.

https://bugzilla.gnome.org/show_bug.cgi?id=673839

gtk/gtktextdisplay.c

@@ -108,6 +108,7 @@ struct _GtkTextRenderer
   cairo_t *cr;
   
   GdkRGBA *error_color;	/* Error underline color for this widget */
+  GList *widgets;      	/* widgets encountered when drawing */
 
   GdkRGBA rgba[4];
   guint8  rgba_set[4];
@@ -422,7 +423,12 @@ gtk_text_renderer_draw_shape (PangoRenderer   *renderer,
     }
   else if (GTK_IS_WIDGET (attr->data))
     {
-      /* nothing to do */
+      GtkWidget *widget;
+      
+      widget = GTK_WIDGET (attr->data);
+
+      text_renderer->widgets = g_list_prepend (text_renderer->widgets,
+					       g_object_ref (widget));
     }
   else
     g_assert_not_reached (); /* not a pixbuf or widget */
@@ -491,10 +497,11 @@ text_renderer_begin (GtkTextRenderer *text_renderer,
 
 /* Returns a GSList of (referenced) widgets encountered while drawing.
  */
-static void
+static GList *
 text_renderer_end (GtkTextRenderer *text_renderer)
 {
   GtkStyleContext *context;
+  GList *widgets = text_renderer->widgets;
 
   cairo_restore (text_renderer->cr);
 
@@ -505,11 +512,15 @@ text_renderer_end (GtkTextRenderer *text_renderer)
   text_renderer->widget = NULL;
   text_renderer->cr = NULL;
 
+  text_renderer->widgets = NULL;
+
   if (text_renderer->error_color)
     {
       gdk_rgba_free (text_renderer->error_color);
       text_renderer->error_color = NULL;
     }
+
+  return widgets;
 }
 
 static cairo_region_t *
@@ -805,7 +816,8 @@ get_text_renderer (void)
 void
 gtk_text_layout_draw (GtkTextLayout *layout,
                       GtkWidget *widget,
-                      cairo_t *cr)
+                      cairo_t *cr,
+                      GList **widgets)
 {
   GtkStyleContext *context;
   gint offset_y;
@@ -814,6 +826,7 @@ gtk_text_layout_draw (GtkTextLayout *layout,
   gboolean have_selection;
   GSList *line_list;
   GSList *tmp_list;
+  GList *tmp_widgets;
   GdkRectangle clip;
 
   g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
@@ -918,7 +931,11 @@ gtk_text_layout_draw (GtkTextLayout *layout,
 
   gtk_text_layout_wrap_loop_end (layout);
 
-  text_renderer_end (text_renderer);
+  tmp_widgets = text_renderer_end (text_renderer);
+  if (widgets)
+    *widgets = tmp_widgets;
+  else
+    g_list_free_full (tmp_widgets, g_object_unref);
 
   g_slist_free (line_list);
 }

gtk/gtktextdisplay.h

@@ -92,7 +92,8 @@ G_BEGIN_DECLS
  */
 void gtk_text_layout_draw (GtkTextLayout        *layout,
                            GtkWidget            *widget,
-                           cairo_t              *cr);
+                           cairo_t              *cr,
+                           GList               **widgets);
 
 
 G_END_DECLS

gtk/gtktextutil.c

@@ -398,7 +398,7 @@ _gtk_text_util_create_rich_drag_icon (GtkWidget     *widget,
    cairo_save (cr);
 
    cairo_translate (cr, 1 + DRAG_ICON_LAYOUT_BORDER, 1 + DRAG_ICON_LAYOUT_BORDER);
-   gtk_text_layout_draw (layout, widget, cr);
+   gtk_text_layout_draw (layout, widget, cr, NULL);
 
    cairo_restore (cr);
 

gtk/gtktextview.c

@@ -4836,7 +4836,8 @@ gtk_text_view_paint (GtkWidget      *widget,
 
   gtk_text_layout_draw (priv->layout,
                         widget,
-                        cr);
+                        cr,
+                        NULL);
 
   cairo_restore (cr);
 }