Add KAM sequence

This sequence lock/unlock the keyboard ignoring all the key pressing events
from X server.
---
 st.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/st.c b/st.c
index 83edbb8..538ed9a 100644 (file)
--- a/st.c
+++ b/st.c
@@ -110,7 +110,8 @@ enum term_mode {
        MODE_MOUSEBTN    = 32,
        MODE_MOUSEMOTION = 64,
        MODE_MOUSE       = 32|64,
-       MODE_REVERSE     = 128
+       MODE_REVERSE     = 128,
+       MODE_KBDLOCK     = 256
 };
 
 enum escape_state {
@@ -1328,6 +1329,9 @@ tsetmode(bool priv, bool set, int *args, int narg) {
                        }
                } else {
                        switch(*args) {
+                       case 2:
+                               MODBIT(term.mode, set, MODE_KBDLOCK);
+                               break;
                        case 4:
                                MODBIT(term.mode, set, MODE_INSERT);
                                break;
@@ -2257,6 +2261,8 @@ kpress(XEvent *ev) {
        int shift;
        Status status;
 
+       if (IS_SET(MODE_KBDLOCK))
+               return;
        meta = e->state & Mod1Mask;
        shift = e->state & ShiftMask;
        len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);