Rewrote "on player holds item/scrolls hotbar" event in new ScriptEven…

…t format.

src/main/java/net/aufdemrand/denizen/Denizen.java

@@ -572,7 +572,6 @@ public void onEnable() {
             OldEventManager.registerSmartEvent(new EntityInteractSmartEvent());
             OldEventManager.registerSmartEvent(new EntitySpawnSmartEvent());
             OldEventManager.registerSmartEvent(new FlagSmartEvent());
-            OldEventManager.registerSmartEvent(new ItemScrollSmartEvent());
             OldEventManager.registerSmartEvent(new ListPingSmartEvent());
             OldEventManager.registerSmartEvent(new NPCNavigationSmartEvent());
             OldEventManager.registerSmartEvent(new PlayerEquipsArmorSmartEvent());
@@ -598,6 +597,7 @@ public void onEnable() {
             ScriptEvent.registerScriptEvent(new EntityKilledScriptEvent());
             ScriptEvent.registerScriptEvent(new EntityTeleportScriptEvent());
             ScriptEvent.registerScriptEvent(new ItemMoveScriptEvent());
+            ScriptEvent.registerScriptEvent(new ItemScrollScriptEvent());
             ScriptEvent.registerScriptEvent(new LiquidSpreadScriptEvent());
             ScriptEvent.registerScriptEvent(new ResourcePackStatusScriptEvent());
             ScriptEvent.registerScriptEvent(new VehicleMoveScriptEvent());

src/main/java/net/aufdemrand/denizen/events/scriptevents/ItemScrollScriptEvent.java

@@ -0,0 +1,91 @@
+package net.aufdemrand.denizen.events.scriptevents;
+
+import net.aufdemrand.denizencore.objects.Element;
+import net.aufdemrand.denizen.utilities.DenizenAPI;
+import net.aufdemrand.denizencore.events.ScriptEvent;
+import net.aufdemrand.denizencore.objects.dObject;
+import net.aufdemrand.denizencore.scripts.containers.ScriptContainer;
+import net.aufdemrand.denizencore.utilities.CoreUtilities;
+import org.bukkit.event.player.PlayerItemHeldEvent;
+
+import org.bukkit.Bukkit;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+
+import java.util.HashMap;
+
+public class ItemScrollScriptEvent extends ScriptEvent implements Listener {
+
+    // <--[event]
+    // @Events
+    // player scrolls their hotbar
+    // player holds item
+    //
+    // @Cancellable true
+    //
+    // @Triggers when a player scrolls through their hotbar.
+    //
+    // @Context
+    // <context.new_slot> returns the number of the new inventory slot.
+    // <context.previous_slot> returns the number of the old inventory slot.
+    //
+    // -->
+
+    public ItemScrollScriptEvent() {
+        instance = this;
+    }
+    public static ItemScrollScriptEvent instance;
+    public Element new_slot;
+    public Element previous_slot;
+    public PlayerItemHeldEvent event;
+
+    @Override
+    public boolean couldMatch(ScriptContainer scriptContainer, String s) {
+        String lower = CoreUtilities.toLowerCase(s);
+        return lower.equals("player holds item")
+                || lower.equals("player scrolls their hotbar");
+    }
+
+    @Override
+    public boolean matches(ScriptContainer scriptContainer, String s) {
+        return true;
+    }
+
+    @Override
+    public String getName() {
+        return "PlayerScrollsItem";
+    }
+
+    @Override
+    public void init() {
+        Bukkit.getServer().getPluginManager().registerEvents(this, DenizenAPI.getCurrentInstance());
+    }
+
+    @Override
+    public void destroy() {
+        PlayerItemHeldEvent.getHandlerList().unregister(this);
+    }
+
+    @Override
+    public boolean applyDetermination(ScriptContainer container, String determination) {
+        return super.applyDetermination(container, determination);
+    }
+
+    @Override
+    public HashMap<String, dObject> getContext() {
+        HashMap<String, dObject> context = super.getContext();
+        context.put("new_slot", new_slot);
+        context.put("previous_slot", previous_slot);
+        return context;
+    }
+
+    @EventHandler
+    public void onPlayerScrollsHotbar(PlayerItemHeldEvent event) {
+        new_slot = new Element(event.getNewSlot() + 1);
+        previous_slot = new Element(event.getPreviousSlot() + 1);
+        cancelled = event.isCancelled();
+        this.event = event;
+        fire();
+        event.setCancelled(cancelled);
+    }
+}