Merge pull request 'Improve GUI' (#79) from improveGUI into master

Reviewed-by: YoyoNow <jwsteam@nidido.de>

SpigotCore_14/src/de/steamwar/inventory/SWItem_14.java

@@ -27,6 +27,8 @@ class SWItem_14 {
     private SWItem_14(){}
 
     static Material getMaterial(String material) {
+        if("CAULDRON_ITEM".equals(material))
+            return Material.CAULDRON;
         try{
             return Material.valueOf(material);
         }catch(IllegalArgumentException e){

SpigotCore_Main/src/de/steamwar/inventory/SWListInv.java

@@ -33,6 +33,7 @@ public class SWListInv<T> extends SWInventory {
     private final List<SWListEntry<T>> elements;
 
     private final Map<Integer, SWItem> customItems = new HashMap<>();
+    private final boolean dynamicSize;
     private ListCallback<T> callback;
     private int page;
     private boolean opened = false;
@@ -46,6 +47,7 @@ public class SWListInv<T> extends SWInventory {
         callback = c;
         elements = l;
         page = 0;
+        this.dynamicSize = dynamicSize;
     }
 
     @Override
@@ -55,7 +57,7 @@ public class SWListInv<T> extends SWInventory {
         callbacks.clear();
         setCallback(-999, (ClickType click) -> player.closeInventory());
 
-        if(elements.size() > 54){
+        if(sizeBiggerMax()){
             if(page != 0)
                 setItem(45, SWItem.getDye(10), (byte)10, "§eSeite zurück", (ClickType click) -> {
                     page--;
@@ -73,7 +75,7 @@ public class SWListInv<T> extends SWInventory {
         }
 
         int ipageLimit = elements.size() - page*45;
-        if(ipageLimit > 45 && elements.size() > 54){
+        if(ipageLimit > 45 && sizeBiggerMax()){
             ipageLimit = 45;
         }
         int i = page*45;
@@ -133,6 +135,10 @@ public class SWListInv<T> extends SWInventory {
         }
         return schemList;
     }
+    
+    private boolean sizeBiggerMax(){
+        return dynamicSize ? elements.size() > 45 : elements.size() > 54;
+    }
 
     private static int dynamicSize(int size){
         return (size>45) ? 54 : (size + 9-size%9);