Circle and round trip gestures (#640)

This implements clockwise/anticlockwise circle and round trip gestures
inspired by Messagease.

The circle gestures start after a small threshold to avoid making the
regular swipe too hard to aim.

The gestures do:

- circle: The center symbol with Shift applied, with a fallback on Fn
- round trip: Same as the circle gesture but applied to a side symbol
- anticlockwise circle: Nothing currently. It is intended to be made
  configurable per-layout in the future.

The new Gesture class keeps track of what the pointer is doing while it moves
on a key. It replaces the 'selected_direction' integer.

1 files changed, 9 insertions, 2 deletions

diff --git a/srcs/juloo.keyboard2/KeyValue.java b/srcs/juloo.keyboard2/KeyValue.java
index 8435cae..e9e66cc 100644
--- a/srcs/juloo.keyboard2/KeyValue.java
+++ b/srcs/juloo.keyboard2/KeyValue.java
@@ -27,6 +27,7 @@ public final class KeyValue implements Comparable<KeyValue>
   public static enum Modifier
   {
     SHIFT,
+    GESTURE,
     CTRL,
     ALT,
     META,
@@ -54,8 +55,8 @@ public final class KeyValue implements Comparable<KeyValue>
     ARROW_RIGHT,
     BREVE,
     BAR,
-    FN, // Must be placed last to be applied first
-  }
+    FN,
+  } // Last is be applied first
 
   public static enum Editing
   {
@@ -404,6 +405,12 @@ public final class KeyValue implements Comparable<KeyValue>
       return new KeyValue(str, Kind.String, 0, flags | FLAG_SMALLER_FONT);
   }
 
+  /** Make a modifier key for passing to [KeyModifier]. */
+  public static KeyValue makeInternalModifier(Modifier mod)
+  {
+    return new KeyValue("", Kind.Modifier, mod.ordinal(), 0);
+  }
+
   public static KeyValue getKeyByName(String name)
   {
     switch (name)