Dump received character width overlay for debugging.

Author: cgull

src/terminal/parseraction.cc

@@ -30,8 +30,12 @@
     also delete it here.
 */
 
+#include <unistd.h>
 #include <wctype.h>
 
+#include <fstream>
+#include <sstream>
+
 #include "parseraction.h"
 #include "terminal.h"
 
@@ -101,6 +105,13 @@ void Resize::act_on_terminal( Terminal::Emulator *emu ) const
 void ChWidthOverlay::act_on_terminal( Terminal::Emulator *emu ) const
 {
   emu->chwidth_overlay( overlay );
+  // XXX debug/exposition-- drop a copy of the overlay.
+  {
+    std::ostringstream s;
+    s << "/tmp/chwidth_overlay_" << getpid();
+    std::ofstream f(s.str().c_str());
+    f << overlay;
+  }
 }
 
 void HoldSession::act_on_terminal( Terminal::Emulator *emu ) const