Add scrolling via mouse

src/main/java/de/zonlykroks/advancedscripts/screen/ScriptEditScreen.java

@@ -34,6 +34,7 @@ public class ScriptEditScreen extends Screen {
     private Hand hand;
 
     private List<String> lines = new ArrayList<>();
+    private int scroll = 0;
     private int cursorY = 0;
     private int cursorX = 0;
 
@@ -113,10 +114,10 @@ public class ScriptEditScreen extends Screen {
 
         int lineNumberLength = textRenderer.getWidth(lines.size() + "");
 
-        int lineNumberText = 1;
+        int lineNumberText = scroll + 1;
         MutableInt lineNumber = new MutableInt();
         TextHandler textHandler = this.textRenderer.getTextHandler();
-        for (int i = 0; i < lines.size(); i++) {
+        for (int i = scroll; i < lines.size(); i++) {
             String s = lines.get(i);
 
             if (lineNumber.getValue() * 9 + 25 > this.height - 66) {
@@ -350,6 +351,23 @@ public class ScriptEditScreen extends Screen {
         return cursorX == lines.get(cursorY).length();
     }
 
+    @Override
+    public boolean mouseScrolled(double mouseX, double mouseY, double amount) {
+        scroll -= amount / 10;
+        if (scroll > lines.size() - 1) {
+            scroll = lines.size() - 1;
+        }
+        if (scroll < 0) {
+            scroll = 0;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean mouseDragged(double mouseX, double mouseY, int button, double deltaX, double deltaY) {
+        return super.mouseDragged(mouseX, mouseY, button, deltaX, deltaY);
+    }
+
     @Override
     public boolean mouseClicked(double mouseX, double mouseY, int button) {
         return super.mouseClicked(mouseX, mouseY, button);