refactor: Implement Compose without global state

Thanks to the previous commit, a modifier key can now be more complex
than just a KeyValue.Modifier. This allows a more elegant implementation
of the compose key, that could be taken as a base for other features
(eg. unicode hex entry, hangul)

The COMPOSE_PENDING modifier is removed as keys of kind Compose_pending
can act as a modifier. This has the advantage of highlighting the key
that was last pressed in the sequence.

Rules are added to Pointers: Non-special but latchable keys must clear
latches and cannot be locked with a long press. These rules were not
needed before but were intended.

1 files changed, 10 insertions, 5 deletions

diff --git a/srcs/juloo.keyboard2/KeyValue.java b/srcs/juloo.keyboard2/KeyValue.java
index f63f558..2a00a59 100644
--- a/srcs/juloo.keyboard2/KeyValue.java
+++ b/srcs/juloo.keyboard2/KeyValue.java
@@ -26,7 +26,6 @@ public final class KeyValue implements Comparable<KeyValue>
   // Must be evaluated in the reverse order of their values.
   public static enum Modifier
   {
-    COMPOSE_PENDING,
     SHIFT,
     CTRL,
     ALT,
@@ -89,8 +88,8 @@ public final class KeyValue implements Comparable<KeyValue>
 
   public static enum Kind
   {
-    Char, String, Keyevent, Event, Modifier, Editing, Placeholder,
-    Compose_pending
+    Char, String, Keyevent, Event, Compose_pending, Modifier, Editing,
+    Placeholder
   }
 
   private static final int FLAGS_OFFSET = 19;
@@ -340,7 +339,13 @@ public final class KeyValue implements Comparable<KeyValue>
   public static KeyValue makeComposePending(String symbol, int state, int flags)
   {
     return new KeyValue(symbol, Kind.Compose_pending, state,
-        flags | FLAG_SPECIAL);
+        flags | FLAG_LATCH);
+  }
+
+  public static KeyValue makeComposePending(int symbol, int state, int flags)
+  {
+    return makeComposePending(String.valueOf((char)symbol), state,
+        flags | FLAG_KEY_FONT);
   }
 
   /** Make a key that types a string. A char key is returned for a string of
@@ -505,7 +510,7 @@ public final class KeyValue implements Comparable<KeyValue>
       case "autofill": return editingKey("auto", Editing.AUTOFILL);
 
       /* The compose key */
-      case "compose": return modifierKey(0xE016, Modifier.COMPOSE_PENDING, FLAG_SECONDARY | FLAG_SMALLER_FONT);
+      case "compose": return makeComposePending(0xE016, 0, FLAG_SECONDARY | FLAG_SMALLER_FONT | FLAG_SPECIAL);
 
       /* Placeholder keys */
       case "removed": return placeholderKey(Placeholder.REMOVED);