[vte] ring: Invert colors for the stream's cells if debugging the ring

[Egmont Koblinger <egmontkob src gnome org>]

commit 83674b1b09d0ee695d0577e86849d42f82ab5942
Author: Egmont Koblinger <egmont gmail com>
Date:   Tue Apr 25 01:11:10 2017 +0200

    ring: Invert colors for the stream's cells if debugging the ring
    
    If debugging the ring (or soon the hyperlink), make cells that are already written
    to the stream appear with reverse colors. This is so that the boundary is more
    prominent because this boundary is a potential source of problems.

 src/ring.cc |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/ring.cc b/src/ring.cc
index 36d82e1..1243f62 100644
--- a/src/ring.cc
+++ b/src/ring.cc
@@ -256,6 +256,12 @@ _vte_ring_thaw_row (VteRing *ring, gulong position, VteRowData *row, gboolean do
                }
 
                cell.attr = attr;
+                _VTE_DEBUG_IF(VTE_DEBUG_RING) {
+                        /* Debug: Reverse the colors for the stream's contents. */
+                        if (!do_truncate) {
+                                cell.attr.reverse = !cell.attr.reverse;
+                        }
+                }
                cell.c = g_utf8_get_char (p);
 
                q = g_utf8_next_char (p);