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commit 20d2845a203ca97afd5f95bd557066376cc293f0
Author: Emanuele Giaquinta 
Date:   Sat May 14 08:31:26 2016 +0000

    Implement xterm focus reporting mode.

    Patch by Daniel Hahler.

diff --git a/doc/rxvt.7.pod b/doc/rxvt.7.pod

--- a/doc/rxvt.7.pod
+++ b/doc/rxvt.7.pod
@@ -1934,12 +1934,12 @@ X

 =end table

-=item B<< C >> (X11 XTerm focus in/focus out events) I
+=item B<< C >> (X11 XTerm focus in/focus out events)

 =begin table

 	B<< C >>	Send Mouse focus in/focus out events.
-	B<< C >>	Don'T send focus events.
+	B<< C >>	Don't send focus events.

 =end table

@@ -2469,6 +2469,7 @@ in combination with other switches) is:
   compile in built-in block graphics
   skip builtin block graphics (-sbg)
   separate highlight colour (-highlightColor, -highlightTextColor)
+  focus reporting mode (1004).
   extended mouse reporting modes (1005 and 1015).
   visual selection via -visual and -depth.

diff --git a/src/command.C b/src/command.C

--- a/src/command.C
+++ b/src/command.C
@@ -1789,6 +1789,9 @@ rxvt_term::focus_in ()
 #if ENABLE_FRILLS
       if (option (Opt_urgentOnBell))
         set_urgency (0);
+
+      if (priv_modes & PrivMode_FocusEvent)
+        tt_printf ("\x1b[I");
 #endif

       HOOK_INVOKE ((this, HOOK_FOCUS_IN, DT_END));
@@ -1806,6 +1809,9 @@ rxvt_term::focus_out ()
 #if ENABLE_FRILLS
       if (option (Opt_urgentOnBell))
         set_urgency (0);
+
+      if (priv_modes & PrivMode_FocusEvent)
+        tt_printf ("\x1b[O");
 #endif
 #if ENABLE_FRILLS || ISO_14755
       if (iso14755buf)
@@ -3709,6 +3715,7 @@ rxvt_term::process_terminal_mode (int mode, int priv ecb_unused, unsigned int na
                   { 1002, PrivMode_MouseBtnEvent },
                   { 1003, PrivMode_MouseAnyEvent },
 #if ENABLE_FRILLS
+                  { 1004, PrivMode_FocusEvent },
                   { 1005, PrivMode_ExtModeMouse },
 #endif
                   { 1010, PrivMode_TtyOutputInh }, // rxvt extension
diff --git a/src/rxvt.h b/src/rxvt.h

--- a/src/rxvt.h
+++ b/src/rxvt.h
@@ -645,6 +645,7 @@ enum {
 #define PrivMode_ExtModeMouse   (1UL<<23) // xterm pseudo-utf-8 hack
 #define PrivMode_ExtMouseRight  (1UL<<24) // xterm pseudo-utf-8, but works in non-utf-8-locales
 #define PrivMode_BlinkingCursor (1UL<<25)
+#define PrivMode_FocusEvent     (1UL<<26)

 #define PrivMode_mouse_report   (PrivMode_MouseX10|PrivMode_MouseX11|PrivMode_MouseBtnEvent|PrivMode_MouseAnyEvent)

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