first try

app/dts/bindings/behaviors/zmk,behavior-hold-tap.yaml

@@ -28,5 +28,6 @@ properties:
       - "hold-preferred"
       - "balanced"
       - "tap-preferred"
+      - "tap-unless-interrupted"
   retro-tap:
     type: boolean

app/src/behaviors/behavior_hold_tap.c

@@ -1,4 +1,5 @@
 /*
+
  * Copyright (c) 2020 The ZMK Contributors
  *
  * SPDX-License-Identifier: MIT
@@ -34,6 +35,7 @@ enum flavor {
     FLAVOR_HOLD_PREFERRED,
     FLAVOR_BALANCED,
     FLAVOR_TAP_PREFERRED,
+    FLAVOR_TAP_UNLESS_INTERRUPTED,
 };
 
 enum status {
@@ -252,6 +254,26 @@ static void decide_tap_preferred(struct active_hold_tap *hold_tap, enum decision
     }
 }
 
+static void decide_tap_unless_interrupted(struct active_hold_tap *hold_tap,
+                                          enum decision_moment event) {
+    switch (event) {
+    case HT_KEY_UP:
+        hold_tap->status = STATUS_TAP;
+        return;
+    case HT_OTHER_KEY_DOWN:
+        hold_tap->status = STATUS_HOLD_INTERRUPT;
+        return;
+    case HT_TIMER_EVENT:
+        hold_tap->status = STATUS_TAP;
+        return;
+    case HT_QUICK_TAP:
+        hold_tap->status = STATUS_TAP;
+        return;
+    default:
+        return;
+    }
+}
+
 static void decide_hold_preferred(struct active_hold_tap *hold_tap, enum decision_moment event) {
     switch (event) {
     case HT_KEY_UP:
@@ -279,6 +301,8 @@ static inline const char *flavor_str(enum flavor flavor) {
         return "balanced";
     case FLAVOR_TAP_PREFERRED:
         return "tap-preferred";
+    case FLAVOR_TAP_UNLESS_INTERRUPTED:
+        return "tap-unless-interrupted";
     default:
         return "UNKNOWN FLAVOR";
     }
@@ -377,6 +401,8 @@ static void decide_hold_tap(struct active_hold_tap *hold_tap,
         decide_balanced(hold_tap, decision_moment);
     case FLAVOR_TAP_PREFERRED:
         decide_tap_preferred(hold_tap, decision_moment);
+    case FLAVOR_TAP_UNLESS_INTERRUPTED:
+        decide_tap_unless_interrupted(hold_tap, decision_moment);
     }
 
     if (hold_tap->status == STATUS_UNDECIDED) {
@@ -611,4 +637,4 @@ static struct behavior_hold_tap_data behavior_hold_tap_data;
 
 DT_INST_FOREACH_STATUS_OKAY(KP_INST)
 
-#endif /* DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) */
+#endif /* DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) */

app/tests/hold-tap/tap-unless-interrupted/1-dn-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/1-dn-up/keycode_events.snapshot

@@ -0,0 +1,5 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment key-up)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/1-dn-up/native_posix.keymap

@@ -0,0 +1,11 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,10) 
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/2-dn-timer-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/2-dn-timer-up/keycode_events.snapshot

@@ -0,0 +1,5 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment timer)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/2-dn-timer-up/native_posix.keymap

@@ -0,0 +1,11 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,500) 
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/3a-moddn-dn-modup-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/3a-moddn-dn-modup-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+kp_pressed: usage_page 0x07 keycode 0xe4 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment key-up)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0xe4 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/3a-moddn-dn-modup-up/native_posix.keymap

@@ -0,0 +1,13 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(1,1,10) /*ctrl*/
+		ZMK_MOCK_PRESS(0,0,100)  /*mt f-shift */
+		ZMK_MOCK_RELEASE(1,1,10)
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/3b-moddn-dn-modup-timer-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/3b-moddn-dn-modup-timer-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+kp_pressed: usage_page 0x07 keycode 0xe4 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment timer)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0xe4 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/3b-moddn-dn-modup-timer-up/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(1,1,10) /*ctrl*/
+		ZMK_MOCK_PRESS(0,0,50)  /*mt f-shift */
+		ZMK_MOCK_RELEASE(1,1,300)
+		/*timer*/
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/3c-kcdn-dn-kcup-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/3c-kcdn-dn-kcup-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+kp_pressed: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_pressed: 0 new undecided hold_tap
+kp_released: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment key-up)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/3c-kcdn-dn-kcup-up/native_posix.keymap

@@ -0,0 +1,13 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(1,0,10) /*d*/
+		ZMK_MOCK_PRESS(0,0,100)  /*mt f-shift */
+		ZMK_MOCK_RELEASE(1,0,10)
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/3d-kcdn-dn-kcup-timer-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/3d-kcdn-dn-kcup-timer-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+kp_pressed: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_pressed: 0 new undecided hold_tap
+kp_released: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment timer)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/3d-kcdn-dn-kcup-timer-up/native_posix.keymap

@@ -0,0 +1,13 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(1,0,10) /* d */
+		ZMK_MOCK_PRESS(0,0,100) /* mt f-shift */
+		ZMK_MOCK_RELEASE(1,0,400)
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/4a-dn-htdn-timer-htup-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/4a-dn-htdn-timer-htup-up/keycode_events.snapshot

@@ -0,0 +1,10 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided hold-interrupt (tap-unless-interrupted decision moment other-key-down)
+kp_pressed: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_pressed: 1 new undecided hold_tap
+ht_decide: 1 decided tap (tap-unless-interrupted decision moment key-up)
+kp_pressed: usage_page 0x07 keycode 0x0d implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x0d implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 1 cleaning up hold-tap
+kp_released: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/4a-dn-htdn-timer-htup-up/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,200)
+		ZMK_MOCK_PRESS(0,1,200)
+		/* timer fires */ 
+		ZMK_MOCK_RELEASE(0,1,10)
+		ZMK_MOCK_RELEASE(0,0,10)
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/4a-dn-kcdn-timer-kcup-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/4a-dn-kcdn-timer-kcup-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided hold-interrupt (tap-unless-interrupted decision moment other-key-down)
+kp_pressed: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+kp_pressed: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/4a-dn-kcdn-timer-kcup-up/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,200)
+		ZMK_MOCK_PRESS(1,0,200)
+		/* timer fires */ 
+		ZMK_MOCK_RELEASE(1,0,10)
+		ZMK_MOCK_RELEASE(0,0,10)
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/4b-dn-kcdn-kcup-timer-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/4b-dn-kcdn-kcup-timer-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided hold-interrupt (tap-unless-interrupted decision moment other-key-down)
+kp_pressed: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+kp_pressed: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/4b-dn-kcdn-kcup-timer-up/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,100)
+		ZMK_MOCK_PRESS(1,0,100)
+		ZMK_MOCK_RELEASE(1,0,200)
+		/* timer fires */ 
+		ZMK_MOCK_RELEASE(0,0,10)
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/4c-dn-kcdn-kcup-up/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/4c-dn-kcdn-kcup-up/keycode_events.snapshot

@@ -0,0 +1,7 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided hold-interrupt (tap-unless-interrupted decision moment other-key-down)
+kp_pressed: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+kp_pressed: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/4c-dn-kcdn-kcup-up/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,10)
+		ZMK_MOCK_PRESS(1,0,10)
+		ZMK_MOCK_RELEASE(1,0,10)
+		ZMK_MOCK_RELEASE(0,0,10)
+		/* timer */ 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/4d-dn-kcdn-timer-up-kcup/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/4d-dn-kcdn-timer-up-kcup/keycode_events.snapshot

@@ -0,0 +1,7 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided hold-interrupt (tap-unless-interrupted decision moment other-key-down)
+kp_pressed: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+kp_pressed: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0xe1 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap
+kp_released: usage_page 0x07 keycode 0x07 implicit_mods 0x00 explicit_mods 0x00

app/tests/hold-tap/tap-unless-interrupted/4d-dn-kcdn-timer-up-kcup/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,100)
+		ZMK_MOCK_PRESS(1,0,100)
+		ZMK_MOCK_RELEASE(0,0,200)
+		/* timer fires */
+		ZMK_MOCK_RELEASE(1,0,10)
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/5-quick-tap/events.patterns

@@ -0,0 +1,4 @@
+s/.*hid_listener_keycode/kp/p
+s/.*mo_keymap_binding/mo/p
+s/.*on_hold_tap_binding/ht_binding/p
+s/.*decide_hold_tap/ht_decide/p

app/tests/hold-tap/tap-unless-interrupted/5-quick-tap/keycode_events.snapshot

@@ -0,0 +1,10 @@
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment key-up)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap
+ht_binding_pressed: 0 new undecided hold_tap
+ht_decide: 0 decided tap (tap-unless-interrupted decision moment quick-tap)
+kp_pressed: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+kp_released: usage_page 0x07 keycode 0x09 implicit_mods 0x00 explicit_mods 0x00
+ht_binding_released: 0 cleaning up hold-tap

app/tests/hold-tap/tap-unless-interrupted/5-quick-tap/native_posix.keymap

@@ -0,0 +1,14 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+#include "../behavior_keymap.dtsi"
+
+
+&kscan {
+	events = <
+		ZMK_MOCK_PRESS(0,0,10) 
+		ZMK_MOCK_RELEASE(0,0,10) 
+		ZMK_MOCK_PRESS(0,0,400)
+		ZMK_MOCK_RELEASE(0,0,10) 
+	>;
+};

app/tests/hold-tap/tap-unless-interrupted/behavior_keymap.dtsi

@@ -0,0 +1,30 @@
+#include <dt-bindings/zmk/keys.h>
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/kscan_mock.h>
+
+
+
+/ {
+	behaviors {
+		ht_tui: behavior_hold_tap_tap_unless_interrupted {
+			compatible = "zmk,behavior-hold-tap";
+			label = "hold_tap_tap_unless_interrupted";
+			#binding-cells = <2>;
+			flavor = "tap-unless-interrupted";
+			tapping-term-ms = <300>;
+			quick-tap-ms = <200>;
+			bindings = <&kp>, <&kp>;
+		};
+	};
+
+	keymap {
+		compatible = "zmk,keymap";
+		label ="Default keymap";
+
+		default_layer {
+			bindings = <
+				&ht_tui LEFT_SHIFT F      &ht_tui LEFT_CONTROL J
+				&kp D      &kp RIGHT_CONTROL>;
+		};
+	};
+};

docs/docs/behaviors/hold-tap.md

@@ -26,6 +26,7 @@ We call this the 'hold-preferred' flavor of hold-taps. While this flavor may wor
 - The 'hold-preferred' flavor triggers the hold behavior when the `tapping-term-ms` has expired or another key is pressed.
 - The 'balanced' flavor will trigger the hold behavior when the `tapping-term-ms` has expired or another key is pressed and released.
 - The 'tap-preferred' flavor triggers the hold behavior when the `tapping-term-ms` has expired. It triggers the tap behavior when another key is pressed.
+- The 'tap-unless-interrupted' flavor triggers a hold behavior only when another key is pressed before `tapping-term-ms` has expired. It triggers the tap behavior in all other situations.
 
 When the hold-tap key is released and the hold behavior has not been triggered, the tap behavior will trigger.