feat: Started implementing screen rendering

And some minor design changes and stuff like that.

src/main/java/cz/jzitnik/Cli.java

@@ -8,11 +8,16 @@ import cz.jzitnik.annotations.Dependency;
 import cz.jzitnik.annotations.injectors.InjectDependency;
 import cz.jzitnik.events.KeyboardPressEvent;
 import cz.jzitnik.events.MouseAction;
+import cz.jzitnik.events.RerenderScreen;
+import cz.jzitnik.events.TerminalResizeEvent;
 import cz.jzitnik.states.RunningState;
 import cz.jzitnik.utils.StateManager;
 import cz.jzitnik.utils.events.EventManager;
-import lombok.SneakyThrows;
+import lombok.extern.slf4j.Slf4j;
 
+import java.io.IOException;
+
+@Slf4j
 @Dependency
 public class Cli implements Runnable {
     @InjectDependency
@@ -21,22 +26,24 @@ public class Cli implements Runnable {
     @InjectDependency
     private StateManager stateManager;
 
-    @SneakyThrows // I know deal with it
     @Override
     public void run() {
         eventManager.start(); // Start event manager thread
 
-        TerminalScreen terminal = new DefaultTerminalFactory()
+        try (TerminalScreen terminal = new DefaultTerminalFactory()
                 .setMouseCaptureMode(MouseCaptureMode.CLICK_RELEASE_DRAG_MOVE)
-                .createScreen();
+                .createScreen()) {
+            stateManager.registerManually(terminal);
 
             terminal.setCursorPosition(null);
             terminal.doResizeIfNecessary();
             terminal.getTerminal().enterPrivateMode();
 
+            terminal.getTerminal().addResizeListener((_, terminalSize) -> eventManager.emitEvent(new TerminalResizeEvent(terminalSize)));
+
             RunningState runningState = stateManager.getOrThrow(RunningState.class);
             while (runningState.isRunning()) {
-            KeyStroke keyStroke = terminal.pollInput();
+                KeyStroke keyStroke = terminal.readInput();
                 if (keyStroke != null) {
                     if (keyStroke instanceof com.googlecode.lanterna.input.MouseAction mouse) {
                         eventManager.emitEvent(new MouseAction(mouse));
@@ -45,9 +52,12 @@ public class Cli implements Runnable {
 
                     eventManager.emitEvent(new KeyboardPressEvent(keyStroke));
                 }
-            Thread.sleep(50);
             }
 
-        terminal.close();
+            eventManager.emitEvent(RerenderScreen.full(terminal.getTerminalSize()));
+        } catch (IOException e) {
+            log.error("Terminal error occurred, shutting down CLI thread.", e);
+            throw new RuntimeException(e);
+        }
     }
 }

src/main/java/cz/jzitnik/config/EventThreadPoolConfig.java

@@ -0,0 +1,10 @@
+package cz.jzitnik.config;
+
+import cz.jzitnik.annotations.Config;
+import lombok.Getter;
+
+@Getter
+@Config
+public class EventThreadPoolConfig {
+    private final int threadCount = 8;
+}

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

@@ -0,0 +1,28 @@
+package cz.jzitnik.events;
+
+import com.googlecode.lanterna.TerminalSize;
+import cz.jzitnik.utils.events.Event;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.awt.*;
+
+public record RerenderScreen(ScreenPart[] parts) implements Event {
+    public static RerenderScreen full(TerminalSize terminalSize) {
+        return new RerenderScreen(
+                new ScreenPart[]{
+                        new ScreenPart(
+                                new Point(0, 0),
+                                new Point(terminalSize.getRows() - 1, terminalSize.getColumns() - 1)
+                        )
+                }
+        );
+    }
+
+    @Data
+    @AllArgsConstructor
+    public static class ScreenPart {
+        private Point start;
+        private Point end;
+    }
+}

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

@@ -0,0 +1,12 @@
+package cz.jzitnik.events;
+
+import com.googlecode.lanterna.TerminalSize;
+import cz.jzitnik.utils.events.Event;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@AllArgsConstructor
+@Getter
+public class TerminalResizeEvent implements Event {
+    private TerminalSize newSize;
+}

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

@@ -0,0 +1,54 @@
+package cz.jzitnik.events.handlers;
+
+import com.googlecode.lanterna.TextCharacter;
+import com.googlecode.lanterna.TextColor;
+import com.googlecode.lanterna.screen.TerminalScreen;
+import cz.jzitnik.annotations.EventHandler;
+import cz.jzitnik.annotations.injectors.InjectState;
+import cz.jzitnik.events.RerenderScreen;
+import cz.jzitnik.states.ScreenBuffer;
+import cz.jzitnik.ui.pixels.Empty;
+import cz.jzitnik.ui.pixels.Pixel;
+import cz.jzitnik.utils.DependencyManager;
+import cz.jzitnik.utils.events.AbstractEventHandler;
+
+import java.awt.*;
+
+@EventHandler(RerenderScreen.class)
+public class CliHandler extends AbstractEventHandler<RerenderScreen> {
+    @InjectState
+    private TerminalScreen terminalScreen;
+
+    @InjectState
+    private ScreenBuffer screenBuffer;
+
+    public CliHandler(DependencyManager dm) {
+        super(dm);
+    }
+
+    @Override
+    public void handle(RerenderScreen event) {
+        var parts = event.parts();
+        var buffer = screenBuffer.getBuffer();
+
+        for (RerenderScreen.ScreenPart part : parts) {
+            Point a = part.getStart();
+            Point b = part.getEnd();
+
+            for (double y = a.getY(); y < b.getY(); y++) {
+                for (double x = a.getX(); x < b.getX(); x++) {
+                    Pixel pixel = buffer[(int) y][(int) x];
+                    terminalScreen.setCharacter(
+                            (int) x,
+                            (int) y,
+                            new TextCharacter(
+                                    ' ',
+                                    TextColor.ANSI.DEFAULT,
+                                    pixel.getClass().equals(Empty.class) ? TextColor.ANSI.DEFAULT : pixel.getColor()
+                            )
+                    );
+                }
+            }
+        }
+    }
+}

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

@@ -24,14 +24,9 @@ public class KeyboardPressEventHandler extends AbstractEventHandler<KeyboardPres
             case Escape:
                 eventManager.emitEvent(new ExitEvent());
                 break;
-            case ArrowUp:
-                System.out.println("Up arrow pressed");
-                break;
             case Character:
-                System.out.println("Key pressed: " + keyStroke.getCharacter());
                 break;
             default:
-                System.out.println("IDK: " + keyStroke.getKeyType());
                 break;
         }
     }

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

@@ -13,6 +13,5 @@ public class MouseActionEventHandler extends AbstractEventHandler<MouseAction> {
 
     @Override
     public void handle(MouseAction event) {
-        System.out.println("ACTION: " + event);
     }
 }

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

@@ -0,0 +1,18 @@
+package cz.jzitnik.events.handlers;
+
+import cz.jzitnik.annotations.EventHandler;
+import cz.jzitnik.events.TerminalResizeEvent;
+import cz.jzitnik.utils.DependencyManager;
+import cz.jzitnik.utils.events.AbstractEventHandler;
+
+@EventHandler(TerminalResizeEvent.class)
+public class TerminalResizeEventHandler extends AbstractEventHandler<TerminalResizeEvent> {
+    public TerminalResizeEventHandler(DependencyManager dm) {
+        super(dm);
+    }
+
+    @Override
+    public void handle(TerminalResizeEvent event) {
+        System.out.println("NEWSIZE: " + event.getNewSize());
+    }
+}

src/main/java/cz/jzitnik/sound/SoundPlayer.java

@@ -0,0 +1,76 @@
+package cz.jzitnik.sound;
+
+import cz.jzitnik.annotations.Dependency;
+import cz.jzitnik.annotations.injectors.InjectDependency;
+import lombok.extern.slf4j.Slf4j;
+
+import javax.sound.sampled.*;
+import java.io.IOException;
+
+@Slf4j
+@Dependency
+public class SoundPlayer {
+    @InjectDependency
+    private ClassLoader classLoader;
+
+    public void playSound(String filePath, int backendVolume, int masterVolume)
+            throws LineUnavailableException, IOException, UnsupportedAudioFileException {
+        if (!filePath.endsWith(".ogg") || masterVolume == 0) {
+            return; // No sound if master volume is 0
+        }
+
+        log.info("Loading resource: {}", "sounds/" + filePath);
+        var file = classLoader.getResourceAsStream("sounds/" + filePath);
+        if (file == null) {
+            return;
+        }
+
+        AudioInputStream audioStream = AudioSystem.getAudioInputStream(file);
+        AudioFormat baseFormat = audioStream.getFormat();
+
+        AudioFormat targetFormat = new AudioFormat(
+                AudioFormat.Encoding.PCM_SIGNED,
+                baseFormat.getSampleRate(),
+                16,
+                baseFormat.getChannels(),
+                baseFormat.getChannels() * 2,
+                baseFormat.getSampleRate(),
+                false
+        );
+
+        AudioInputStream dataIn = AudioSystem.getAudioInputStream(targetFormat, audioStream);
+
+        byte[] buffer = new byte[8192];
+        DataLine.Info info = new DataLine.Info(SourceDataLine.class, targetFormat);
+
+        try (SourceDataLine line = (SourceDataLine) AudioSystem.getLine(info)) {
+            if (line != null) {
+                line.open(targetFormat);
+                line.start();
+
+                float finalVolume = (backendVolume / 100.0f) * (masterVolume / 100.0f);
+                log.info("Applying volume: {} (backend: {}, master: {})", finalVolume, backendVolume, masterVolume);
+
+                int bytesRead;
+                while ((bytesRead = dataIn.read(buffer, 0, buffer.length)) != -1) {
+                    applyVolume(buffer, bytesRead, finalVolume);
+                    line.write(buffer, 0, bytesRead);
+                }
+
+                line.drain();
+            }
+        }
+
+        dataIn.close();
+        audioStream.close();
+    }
+
+    private static void applyVolume(byte[] buffer, int bytesRead, float volume) {
+        for (int i = 0; i < bytesRead; i += 2) { // 16-bit PCM samples are 2 bytes each
+            int sample = (buffer[i] & 0xFF) | (buffer[i + 1] << 8);
+            sample = (int) (sample * volume);
+            buffer[i] = (byte) (sample & 0xFF);
+            buffer[i + 1] = (byte) ((sample >> 8) & 0xFF);
+        }
+    }
+}

src/main/java/cz/jzitnik/states/ScreenBuffer.java

@@ -0,0 +1,11 @@
+package cz.jzitnik.states;
+
+import cz.jzitnik.annotations.State;
+import cz.jzitnik.ui.pixels.Pixel;
+import lombok.Data;
+
+@Data
+@State
+public class ScreenBuffer {
+    private Pixel[][] buffer;
+}

src/main/java/cz/jzitnik/ui/pixels/ColoredPixel.java

@@ -0,0 +1,9 @@
+package cz.jzitnik.ui.pixels;
+
+import com.googlecode.lanterna.TextColor;
+
+public final class ColoredPixel extends Pixel {
+    public ColoredPixel(TextColor color) {
+        super(color);
+    }
+}

src/main/java/cz/jzitnik/ui/pixels/Empty.java

@@ -0,0 +1,7 @@
+package cz.jzitnik.ui.pixels;
+
+public final class Empty extends Pixel {
+    public Empty() {
+        super(null);
+    }
+}

src/main/java/cz/jzitnik/ui/pixels/Pixel.java

@@ -0,0 +1,11 @@
+package cz.jzitnik.ui.pixels;
+
+import com.googlecode.lanterna.TextColor;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public sealed abstract class Pixel permits Empty, ColoredPixel {
+    protected TextColor color;
+}

src/main/java/cz/jzitnik/utils/DependencyManager.java

@@ -1,5 +1,8 @@
 package cz.jzitnik.utils;
 
+// Don't blame me im using field injection instead of construction injection. I just like it more leave me alone.
+// Yes I know I'll suffer in the unit tests.
+
 import cz.jzitnik.annotations.Config;
 import cz.jzitnik.annotations.Dependency;
 import cz.jzitnik.annotations.injectors.InjectConfig;
@@ -47,10 +50,12 @@ public class DependencyManager {
                 var instance = constructor.newInstance();
                 configs.put(configClass, instance);
             } catch (NoSuchMethodException | InvocationTargetException | InstantiationException |
-                     IllegalAccessException _) {
+                     IllegalAccessException e) {
+                log.error("Failed to instantiate config class: {}", configClass.getName(), e);
             }
         }
 
+        data.put(ClassLoader.class, DependencyManager.class.getClassLoader());
         Set<Class<?>> classes = reflections.getTypesAnnotatedWith(Dependency.class);
 
         // Construct all classes
@@ -62,9 +67,7 @@ public class DependencyManager {
 
                 for (int i = 0; i < paramTypes.length; i++) {
                     Class<?> type = paramTypes[i];
-                    if (configs.containsKey(type))
-                        params[i] = configs.get(type);
-                    else if (type == getClass())
+                    if (type == getClass())
                         params[i] = this;
                     else if (type == Reflections.class)
                         params[i] = reflections;
@@ -103,7 +106,7 @@ public class DependencyManager {
 
                     if (!data.containsKey(field.getType())) continue;
 
-                    Object dependency = data.get(field.getType());
+                    Object dependency = field.getType() == getClass() ? this : data.get(field.getType());
 
                     if (!field.getType().isAssignableFrom(dependency.getClass())) continue;
 

src/main/java/cz/jzitnik/utils/StateManager.java

@@ -3,12 +3,14 @@ package cz.jzitnik.utils;
 
 import cz.jzitnik.annotations.Dependency;
 import cz.jzitnik.annotations.State;
+import lombok.extern.slf4j.Slf4j;
 import org.reflections.Reflections;
 
 import java.lang.reflect.InvocationTargetException;
 import java.util.HashMap;
 import java.util.Optional;
 
+@Slf4j
 @Dependency
 public class StateManager {
     private final HashMap<Class<?>, Object> data = new HashMap<>();
@@ -21,11 +23,16 @@ public class StateManager {
                 var instance = clazz.getDeclaredConstructor().newInstance();
                 data.put(clazz, instance);
             } catch (InstantiationException | IllegalAccessException | InvocationTargetException |
-                     NoSuchMethodException _) {
+                     NoSuchMethodException e) {
+                log.error("Failed to instantiate state class: {}", clazz.getName(), e);
             }
         }
     }
 
+    public void registerManually(Object instance) {
+        data.put(instance.getClass(), instance);
+    }
+
     @SuppressWarnings("unchecked")
     public <T> Optional<T> get(Class<T> clazz) {
         return Optional.ofNullable((T) data.get(clazz));

src/main/java/cz/jzitnik/utils/events/EventManager.java

@@ -2,21 +2,28 @@ package cz.jzitnik.utils.events;
 
 import cz.jzitnik.annotations.Dependency;
 import cz.jzitnik.annotations.EventHandler;
+import cz.jzitnik.annotations.injectors.InjectConfig;
 import cz.jzitnik.annotations.injectors.InjectState;
+import cz.jzitnik.config.EventThreadPoolConfig;
 import cz.jzitnik.states.RunningState;
 import cz.jzitnik.utils.DependencyManager;
+import lombok.extern.slf4j.Slf4j;
 import org.reflections.Reflections;
+import org.w3c.dom.events.EventException;
 
 import java.lang.reflect.InvocationTargetException;
 import java.util.HashMap;
-import java.util.concurrent.BlockingQueue;
-import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.*;
 
+@Slf4j
 @Dependency
 public class EventManager extends Thread {
     @InjectState
     private RunningState runningState;
+    @InjectConfig
+    private EventThreadPoolConfig eventThreadPoolConfig;
 
+    private ExecutorService eventExecutor;
     private final HashMap<Class<? extends Event>, AbstractEventHandler<? extends Event>> handlers = new HashMap<>();
     private final BlockingQueue<Event> eventQueue = new LinkedBlockingQueue<>();
 
@@ -29,6 +36,7 @@ public class EventManager extends Thread {
         eventQueue.add(event);
     }
 
+    @SuppressWarnings("unchecked")
     public EventManager(Reflections reflections, DependencyManager dependencyManager) {
         setDaemon(true);
 
@@ -41,34 +49,34 @@ public class EventManager extends Thread {
                 handlers.put(eventHandler.value(), instance);
             } catch (InstantiationException | IllegalAccessException | InvocationTargetException |
                      NoSuchMethodException e) {
+                log.error("Failed to instantiate event handler: {}", clazz.getName(), e);
             }
         }
-
-        try {
-            Thread.sleep(3000);
-        } catch (InterruptedException e) {
-            throw new RuntimeException(e);
-        }
     }
 
     @Override
     public void run() {
+        eventExecutor = Executors.newFixedThreadPool(eventThreadPoolConfig.getThreadCount());
         while (runningState.isRunning()) {
             try {
                 Event event = eventQueue.take();
                 handleEvent(event);
             } catch (InterruptedException e) {
-                // Program stops
+                // The game is shutting down.
+                eventExecutor.shutdownNow();
+                Thread.currentThread().interrupt();
             }
         }
+        eventExecutor.shutdown();
     }
 
     @SuppressWarnings("unchecked")
     private <T extends Event> void handleEvent(Event event) {
-        T typedEvent = (T) event;  // safe because handler is keyed by event.getClass()
+        T typedEvent = (T) event;
         AbstractEventHandler<T> handler = getHandler((Class<T>) event.getClass());
-        Thread thread = new Thread(() -> handler.handle(typedEvent));
-        thread.setDaemon(true);
-        thread.start();
+
+        if (handler != null) {
+            eventExecutor.submit(() -> handler.handle(typedEvent));
+        }
     }
 }