Make setting or releasing a lock break an active latch

For example, if `Caps_Lock` is on the second level of some key,
and `Shift` is latched, pressing the key will lock `Caps`
while also breaking the `Shift` latch, ensuring that the next character
is properly uppercase. (Prior to this commit, both `Shift` and
`Caps` would be active, so the next character would be lowercase.)

Signed-off-by: Jules Bertholet <[email protected]>

changes/api/+locks-break-latches.breaking.md

@@ -0,0 +1,3 @@
+Changed modifier and group latches so that setting or releasing a lock now breaks them.
+This enables implementing a key that, for example, latches `Shift`
+when pressed once, but locks `Caps` when pressed twice in succession.

src/state.c

@@ -313,16 +313,20 @@ xkb_filter_group_lock_func(struct xkb_state *state,
 }
 
 static bool
-xkb_action_breaks_latch(const union xkb_action *action)
+xkb_action_breaks_latch(const union xkb_action *action, bool is_group_latch)
 {
     switch (action->type) {
     case ACTION_TYPE_NONE:
+    case ACTION_TYPE_MOD_LOCK:
+    case ACTION_TYPE_GROUP_LOCK:
+    case ACTION_TYPE_PTR_MOVE:
     case ACTION_TYPE_PTR_BUTTON:
     case ACTION_TYPE_PTR_LOCK:
+    case ACTION_TYPE_PTR_DEFAULT:
+    case ACTION_TYPE_TERMINATE:
+    case ACTION_TYPE_SWITCH_VT:
     case ACTION_TYPE_CTRL_SET:
     case ACTION_TYPE_CTRL_LOCK:
-    case ACTION_TYPE_SWITCH_VT:
-    case ACTION_TYPE_TERMINATE:
         return true;
     default:
         return false;