feat: Handle small terminals

src/main/java/cz/jzitnik/events/TerminalTooSmallEvent.java

@@ -0,0 +1,6 @@
+package cz.jzitnik.events;
+
+import cz.jzitnik.utils.events.Event;
+
+public class TerminalTooSmallEvent implements Event {
+}

src/main/java/cz/jzitnik/events/handlers/FullRoomDrawHandler.java

@@ -9,6 +9,7 @@ import cz.jzitnik.annotations.injectors.InjectDependency;
 import cz.jzitnik.annotations.injectors.InjectState;
 import cz.jzitnik.events.FullRoomDraw;
 import cz.jzitnik.events.RerenderScreen;
+import cz.jzitnik.events.TerminalTooSmallEvent;
 import cz.jzitnik.game.GameRoom;
 import cz.jzitnik.game.GameState;
 import cz.jzitnik.game.Player;
@@ -62,6 +63,7 @@ public class FullRoomDrawHandler extends AbstractEventHandler<FullRoomDraw> {
 
     @Override
     public void handle(FullRoomDraw event) {
+        try {
             log.debug("Rendering full room");
             TerminalScreen terminalScreen = terminalState.getTerminalScreen();
             List<RerenderScreen.ScreenPart> partsToRerender = new ArrayList<>();
@@ -113,5 +115,9 @@ public class FullRoomDrawHandler extends AbstractEventHandler<FullRoomDraw> {
             } else {
                 eventManager.emitEvent(new RerenderScreen(partsToRerender.toArray(RerenderScreen.ScreenPart[]::new)));
             }
+        } catch (ArrayIndexOutOfBoundsException e) {
+            // Screen too small to fit the room
+            eventManager.emitEvent(new TerminalTooSmallEvent());
+        }
     }
 }

src/main/java/cz/jzitnik/events/handlers/TerminalTooSmallEventHandler.java

@@ -0,0 +1,54 @@
+package cz.jzitnik.events.handlers;
+
+import com.googlecode.lanterna.SGR;
+import com.googlecode.lanterna.TerminalSize;
+import com.googlecode.lanterna.TextCharacter;
+import com.googlecode.lanterna.TextColor;
+import com.googlecode.lanterna.screen.Screen;
+import com.googlecode.lanterna.screen.TerminalScreen;
+import cz.jzitnik.annotations.EventHandler;
+import cz.jzitnik.annotations.injectors.InjectState;
+import cz.jzitnik.events.TerminalTooSmallEvent;
+import cz.jzitnik.states.TerminalState;
+import cz.jzitnik.utils.DependencyManager;
+import cz.jzitnik.utils.events.AbstractEventHandler;
+
+import java.io.IOException;
+
+@EventHandler(TerminalTooSmallEvent.class)
+public class TerminalTooSmallEventHandler extends AbstractEventHandler<TerminalTooSmallEvent> {
+    public TerminalTooSmallEventHandler(DependencyManager dm) {
+        super(dm);
+    }
+
+    @InjectState
+    private TerminalState terminalState;
+
+    @Override
+    public void handle(TerminalTooSmallEvent event) {
+        // Directly render message for the user
+        TerminalScreen terminalScreen = terminalState.getTerminalScreen();
+        terminalScreen.clear();
+
+        TerminalSize terminalSize = terminalScreen.getTerminalSize();
+        String text = "Terminal too small!";
+        String subText = "Please resize your terminal";
+
+        int startY = terminalSize.getRows() / 2;
+
+        int textStartX = (terminalSize.getColumns() / 2) - (text.length() / 2);
+        for (char character : text.toCharArray()) {
+            terminalScreen.setCharacter(textStartX++, startY, new TextCharacter(character, TextColor.ANSI.RED, TextColor.ANSI.DEFAULT, SGR.BOLD));
+        }
+        int subTextStartX = (terminalSize.getColumns() / 2) - (subText.length() / 2);
+        for (char character : subText.toCharArray()) {
+            terminalScreen.setCharacter(subTextStartX++, startY + 1, new TextCharacter(character, TextColor.ANSI.BLACK_BRIGHT, TextColor.ANSI.DEFAULT));
+        }
+
+        try {
+            terminalScreen.refresh(Screen.RefreshType.COMPLETE);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}