allow <CTRL/C> to be typed; aborts last typed char

 * CTRL/C will be a command so it is important to be able to type it directly
 * aborting character processing is important because it allows aborting infinite loops
 * since the loop interruption currently relies on SIGINT handling, there is only limited
   support for XCurses and GTK - CTRL/C has to be typed in the terminal window.
   later support for input queue polling might be added

1 files changed, 8 insertions, 0 deletions

diff --git a/src/interface.h b/src/interface.h
index 28be9fe..38cd725 100644
--- a/src/interface.h
+++ b/src/interface.h
@@ -19,6 +19,7 @@
 #define __INTERFACE_H
 
 #include <stdarg.h>
+#include <signal.h>
 
 #include <glib.h>
 
@@ -29,6 +30,7 @@
 /* avoid include dependency conflict */
 class QRegister;
 class Buffer;
+extern sig_atomic_t sigint_occurred;
 
 /*
  * Base class for all user interfaces - used mereley as a class interface.
@@ -107,6 +109,12 @@ public:
 	virtual void popup_show(void) = 0;
 	virtual void popup_clear(void) = 0;
 
+	virtual inline bool
+	is_interrupted(void)
+	{
+		return sigint_occurred != FALSE;
+	}
+
 	/* main entry point */
 	virtual void event_loop(void) = 0;