feat: Answer requirements

.idea/compiler.xml

@@ -34,6 +34,7 @@
           <entry name="$MAVEN_REPOSITORY$/org/projectlombok/lombok/1.18.38/lombok-1.18.38.jar" />
         </processorPath>
         <module name="game (1)" />
+        <module name="game" />
       </profile>
     </annotationProcessing>
   </component>

game/src/main/java/cz/jzitnik/client/events/handlers/DialogEventHandler.java

@@ -7,6 +7,7 @@ import cz.jzitnik.client.annotations.EventHandler;
 import cz.jzitnik.client.annotations.injectors.InjectDependency;
 import cz.jzitnik.client.annotations.injectors.InjectState;
 import cz.jzitnik.client.events.RerenderScreen;
+import cz.jzitnik.client.game.GameState;
 import cz.jzitnik.client.game.dialog.Dialog;
 import cz.jzitnik.client.game.dialog.OnEnd;
 import cz.jzitnik.client.states.DialogState;
@@ -22,8 +23,8 @@ import cz.jzitnik.client.utils.events.EventManager;
 import lombok.extern.slf4j.Slf4j;
 
 import java.awt.*;
-import java.util.List;
 import java.util.ArrayList;
+import java.util.List;
 
 @Slf4j
 @EventHandler(Dialog.class)
@@ -38,6 +39,9 @@ public class DialogEventHandler extends AbstractEventHandler<Dialog> {
     @InjectState
     private ScreenBuffer screenBuffer;
 
+    @InjectState
+    private GameState gameState;
+
     @InjectDependency
     private EventManager eventManager;
 
@@ -56,32 +60,45 @@ public class DialogEventHandler extends AbstractEventHandler<Dialog> {
     public static final int BUTTON_PADDING = 5;
     private static final float FONT_SIZE = 15f;
 
-    public static int calculateButtonHeight(Dialog dialog) {
+    public static int calculateButtonHeight(Dialog dialog, GameState gameState) {
-        if (dialog.getOnEnd() instanceof OnEnd.AskQuestion(OnEnd.AskQuestion.Answer[] answers)) {
+        if (dialog.getOnEnd() instanceof OnEnd.AskQuestion askQuestion) {
-            return answers.length * BUTTON_HEIGHT + (answers.length - 1) * BUTTON_PADDING;
+            int count = askQuestion.answers(gameState).length;
-        } else {
+            return count * BUTTON_HEIGHT + Math.max(0, count - 1) * BUTTON_PADDING;
-            return 0;
         }
+        return 0;
     }
 
     public static int getYStartButtons(TextRenderer textRenderer, Dialog dialog) {
-        var textSize = textRenderer.measureText(dialog.getText(), WIDTH - PADDING * 2, FONT_SIZE);
+        var textSize = textRenderer.measureText(
+                dialog.getText(),
+                WIDTH - PADDING * 2,
+                FONT_SIZE
+        );
 
         return PADDING + textSize.height + BUTTON_PADDING;
     }
 
-    public static TerminalSize getSize(TextRenderer textRenderer, Dialog dialog) {
+    public static TerminalSize getSize(TextRenderer textRenderer, Dialog dialog, GameState gameState) {
-        var textSize = textRenderer.measureText(dialog.getText(), WIDTH - PADDING * 2, FONT_SIZE);
+        var textSize = textRenderer.measureText(
+                dialog.getText(),
+                WIDTH - PADDING * 2,
+                FONT_SIZE
+        );
 
-        return new TerminalSize(300, PADDING + textSize.height + (
+        int buttonsHeight = 0;
-                dialog.getOnEnd() instanceof OnEnd.AskQuestion ? BUTTON_PADDING + calculateButtonHeight(dialog) : 0
+        if (dialog.getOnEnd() instanceof OnEnd.AskQuestion) {
-        ) + PADDING);
+            buttonsHeight = BUTTON_PADDING + calculateButtonHeight(dialog, gameState);
+        }
+
+        return new TerminalSize(
+                300,
+                PADDING + textSize.height + buttonsHeight + PADDING
+        );
     }
 
     public static TerminalPosition getStart(TerminalSize terminalSize, TerminalSize size) {
         int startY = terminalSize.getRows() * 2 - MARGIN_BOTTOM - size.getRows();
         int startX = (terminalSize.getColumns() / 2) - (size.getColumns() / 2);
-
         return new TerminalPosition(startX, startY);
     }
 
@@ -89,58 +106,114 @@ public class DialogEventHandler extends AbstractEventHandler<Dialog> {
     public void handle(Dialog event) {
         boolean onlyLast = dialogState.getCurrentDialog() == event;
         dialogState.setCurrentDialog(event);
+
         TerminalSize terminalSize = terminalState.getTerminalScreen().getTerminalSize();
         var overrideBuffer = screenBuffer.getGlobalOverrideBuffer();
-        var size = getSize(textRenderer, event);
+        var size = getSize(textRenderer, event, gameState);
-
         var start = getStart(terminalSize, size);
 
-        var animation = textRenderer.renderTypingAnimation(event.getText(), size.getColumns() - PADDING * 2, size.getRows() - PADDING * 2, Color.WHITE, FONT_SIZE);
+        var animation = textRenderer.renderTypingAnimation(
-        var textSize = textRenderer.measureText(event.getText(), size.getColumns() - PADDING * 2, FONT_SIZE);
+                event.getText(),
+                size.getColumns() - PADDING * 2,
+                size.getRows() - PADDING * 2,
+                Color.WHITE,
+                FONT_SIZE
+        );
+
+        var textSize = textRenderer.measureText(
+                event.getText(),
+                size.getColumns() - PADDING * 2,
+                FONT_SIZE
+        );
+
         OnEnd onEnd = event.getOnEnd();
 
         List<AlphaPixel[][]> answersBuf = new ArrayList<>();
+        OnEnd.AskQuestion askQuestion = null;
 
-        if (onEnd instanceof OnEnd.AskQuestion(
+        if (onEnd instanceof OnEnd.AskQuestion aq) {
-                OnEnd.AskQuestion.Answer[] answers
+            askQuestion = aq;
-        )) {
+            for (OnEnd.AskQuestion.Answer answer : aq.answers(gameState)) {
-            for (OnEnd.AskQuestion.Answer answer : answers) {
+                answersBuf.add(
-                answersBuf.add(textRenderer.renderText(answer.answer(), size.getColumns() - PADDING * 2, BUTTON_HEIGHT, Color.BLACK, FONT_SIZE, false));
+                        textRenderer.renderText(
+                                answer.answer(),
+                                size.getColumns() - PADDING * 2,
+                                BUTTON_HEIGHT,
+                                Color.BLACK,
+                                FONT_SIZE,
+                                false
+                        )
+                );
             }
         }
 
         dialogState.setRenderInProgress(true);
+
         try {
             for (int i = onlyLast ? animation.length : 0; i <= animation.length; i++) {
                 var buf = animation[Math.min(i, animation.length - 1)];
+
                 for (int y = 0; y < size.getRows(); y++) {
                     for (int x = 0; x < size.getColumns(); x++) {
-                        var textPixel = buf[Math.min(Math.max(0, y - PADDING), buf.length - 1)][Math.min(Math.max(0, x - PADDING), buf[0].length - 1)];
+
-                        if (textPixel instanceof Empty || y < PADDING || x < PADDING || x >= size.getColumns() - PADDING || y >= size.getRows() - PADDING) {
+                        var textPixel = buf[
-                            if (i == animation.length && y - 2 > textSize.height + QUESTION_ACTIONS_GAP && onEnd instanceof OnEnd.AskQuestion(
+                                Math.min(Math.max(0, y - PADDING), buf.length - 1)
-                                    OnEnd.AskQuestion.Answer[] answers
+                                ][
-                            )) {
+                                Math.min(Math.max(0, x - PADDING), buf[0].length - 1)
+                                ];
+
+                        if (textPixel instanceof Empty
+                                || y < PADDING
+                                || x < PADDING
+                                || x >= size.getColumns() - PADDING
+                                || y >= size.getRows() - PADDING) {
+
+                            if (i == animation.length
+                                    && askQuestion != null
+                                    && y - 2 > textSize.height + QUESTION_ACTIONS_GAP) {
+
+                                var answers = askQuestion.answers(gameState);
+
                                 int buttonsY = y - textSize.height - QUESTION_ACTIONS_GAP - 2;
                                 int buttonIndex = buttonsY / (BUTTON_HEIGHT + BUTTON_PADDING);
                                 int rest = buttonsY % (BUTTON_HEIGHT + BUTTON_PADDING);
 
-                                if (buttonIndex < answers.length && rest < BUTTON_HEIGHT && x >= PADDING && x < size.getColumns() - PADDING) {
+                                if (buttonIndex < answers.length
+                                        && rest < BUTTON_HEIGHT
+                                        && x >= PADDING
+                                        && x < size.getColumns() - PADDING) {
+
                                     int localY = rest - BUTTON_TEXT_PADDING;
                                     int localX = x - PADDING - BUTTON_TEXT_PADDING;
+
                                     var buttonBuf = answersBuf.get(buttonIndex);
-                                    var buttonTextPixel = buttonBuf[Math.min(Math.max(0, localY), buttonBuf.length - 1)][Math.min(Math.max(0, localX), buttonBuf[0].length - 1)];
+                                    var buttonTextPixel = buttonBuf[
+                                            Math.min(Math.max(0, localY), buttonBuf.length - 1)
+                                            ][
+                                            Math.min(Math.max(0, localX), buttonBuf[0].length - 1)
+                                            ];
 
-                                    if (buttonTextPixel instanceof Empty || localY < 0 || localX < 0 || localY >= buttonBuf.length || localX >= buttonBuf[0].length) {
+                                    if (buttonTextPixel instanceof Empty
-                                        overrideBuffer[start.getRow() + y][start.getColumn() + x] = new ColoredPixel(new TextColor.RGB(255, 255, 255), dialogState.getHoveredButtonIndex() == buttonIndex ? 0.8f : 0.6f);
+                                            || localY < 0
+                                            || localX < 0
+                                            || localY >= buttonBuf.length
+                                            || localX >= buttonBuf[0].length) {
+
+                                        overrideBuffer[start.getRow() + y][start.getColumn() + x] =
+                                                new ColoredPixel(
+                                                        new TextColor.RGB(255, 255, 255),
+                                                        dialogState.getHoveredButtonIndex() == buttonIndex ? 0.8f : 0.6f
+                                                );
                                     } else {
-                                        overrideBuffer[start.getRow() + y][start.getColumn() + x] = buttonTextPixel;
+                                        overrideBuffer[start.getRow() + y][start.getColumn() + x] =
+                                                buttonTextPixel;
                                     }
-
                                     continue;
                                 }
                             }
 
-                            overrideBuffer[start.getRow() + y][start.getColumn() + x] = new ColoredPixel(new TextColor.RGB(0, 0, 0), 0.6f);
+                            overrideBuffer[start.getRow() + y][start.getColumn() + x] =
+                                    new ColoredPixel(new TextColor.RGB(0, 0, 0), 0.6f);
                             continue;
                         }
 
@@ -152,7 +225,10 @@ public class DialogEventHandler extends AbstractEventHandler<Dialog> {
                         new RerenderScreen(
                                 new RerenderScreen.ScreenPart(
                                         start,
-                                        new TerminalPosition(start.getColumn() + size.getColumns(), start.getRow() + size.getRows())
+                                        new TerminalPosition(
+                                                start.getColumn() + size.getColumns(),
+                                                start.getRow() + size.getRows()
+                                        )
                                 )
                         )
                 );
@@ -161,7 +237,6 @@ public class DialogEventHandler extends AbstractEventHandler<Dialog> {
             }
 
             dialogState.setRenderInProgress(false);
-
             next(onEnd, start, size);
 
         } catch (InterruptedException e) {
@@ -171,34 +246,38 @@ public class DialogEventHandler extends AbstractEventHandler<Dialog> {
 
     private void next(OnEnd onEnd, TerminalPosition start, TerminalSize size) throws InterruptedException {
         Thread.sleep(1000);
-        if (onEnd instanceof OnEnd.Continue(Dialog nextDialog)) {
-            for (int y = start.getRow(); y < start.getRow() + size.getRows(); y++) {
-                for (int x = start.getColumn(); x < start.getColumn() + size.getColumns(); x++) {
-                    screenBuffer.getGlobalOverrideBuffer()[y][x] = new Empty();
-                }
-            }
 
+        if (onEnd instanceof OnEnd.Continue(Dialog nextDialog)) {
+            clear(start, size);
             eventManager.emitEvent(nextDialog);
+
         } else if (onEnd instanceof OnEnd.RunCode(Runnable runnable, OnEnd end)) {
             dependencyManager.inject(runnable);
             runnable.run();
             next(end, start, size);
-        } else if (onEnd instanceof OnEnd.End) {
-            for (int y = start.getRow(); y < start.getRow() + size.getRows(); y++) {
-                for (int x = start.getColumn(); x < start.getColumn() + size.getColumns(); x++) {
-                    screenBuffer.getGlobalOverrideBuffer()[y][x] = new Empty();
-                }
-            }
 
+        } else if (onEnd instanceof OnEnd.End) {
+            clear(start, size);
             dialogState.setCurrentDialog(null);
             eventManager.emitEvent(
                     new RerenderScreen(
                             new RerenderScreen.ScreenPart(
                                     start,
-                                    new TerminalPosition(start.getColumn() + size.getColumns(), start.getRow() + size.getRows())
+                                    new TerminalPosition(
+                                            start.getColumn() + size.getColumns(),
+                                            start.getRow() + size.getRows()
+                                    )
                             )
                     )
             );
         }
     }
+
+    private void clear(TerminalPosition start, TerminalSize size) {
+        for (int y = start.getRow(); y < start.getRow() + size.getRows(); y++) {
+            for (int x = start.getColumn(); x < start.getColumn() + size.getColumns(); x++) {
+                screenBuffer.getGlobalOverrideBuffer()[y][x] = new Empty();
+            }
+        }
+    }
 }

game/src/main/java/cz/jzitnik/client/game/dialog/OnEnd.java

@@ -4,6 +4,11 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import cz.jzitnik.client.game.GameState;
+import cz.jzitnik.client.game.Requirement;
+
+import java.util.Arrays;
+import java.util.Optional;
 
 @JsonTypeInfo(
         use = JsonTypeInfo.Id.NAME,
@@ -15,9 +20,11 @@ import com.fasterxml.jackson.annotation.JsonTypeInfo;
         @JsonSubTypes.Type(value = OnEnd.End.class, name = "end"),
 })
 public interface OnEnd {
-    record End() implements OnEnd {}
+    record End() implements OnEnd {
+    }
 
-    record RunCode(Runnable runnable, OnEnd onEnd) implements OnEnd {} // TODO: Serialize
+    record RunCode(Runnable runnable, OnEnd onEnd) implements OnEnd {
+    } // TODO: Serialize
 
     record Continue(Dialog nextDialog) implements OnEnd {
         @JsonCreator
@@ -32,15 +39,46 @@ public interface OnEnd {
             this.answers = answers;
         }
 
-        public record Answer(String answer, Dialog dialog) {
+        public record Answer(
+                String answer,
+                Dialog dialog,
+                Optional<Requirement> requirement
+        ) {
             @JsonCreator
             public Answer(
                     @JsonProperty("answer") String answer,
-                    @JsonProperty("dialog") Dialog dialog
+                    @JsonProperty("dialog") Dialog dialog,
+                    @JsonProperty("requirement") Requirement requirement
             ) {
-                this.answer = answer;
+                this(answer, dialog, Optional.ofNullable(requirement));
-                this.dialog = dialog;
+            }
-            }
+
+            private boolean isValid(GameState gameState) {
+                if (requirement.isPresent()) {
+                    Requirement requirement = requirement().get();
+                    if (requirement.itemType() != null) {
+                        if (Arrays.stream(gameState.getPlayer().getInventory()).noneMatch(item -> {
+                            if (item == null) {
+                                return false;
+                            }
+
+                            return item.getType().getItemType().getSimpleName().equals(requirement.itemType());
+                        })) {
+                            return false;
+                        }
+                    }
+
+                    return true;
+                }
+
+                return true;
+            }
+        }
+
+        public Answer[] answers(GameState gameState) {
+            return Arrays.stream(answers)
+                    .filter(answer -> answer.isValid(gameState))
+                    .toArray(Answer[]::new);
         }
     }
 }

game/src/main/java/cz/jzitnik/client/ui/DialogUI.java

@@ -11,6 +11,7 @@ import cz.jzitnik.client.annotations.ui.UI;
 import cz.jzitnik.client.events.MouseAction;
 import cz.jzitnik.client.events.RerenderScreen;
 import cz.jzitnik.client.events.handlers.DialogEventHandler;
+import cz.jzitnik.client.game.GameState;
 import cz.jzitnik.client.game.dialog.OnEnd;
 import cz.jzitnik.client.states.DialogState;
 import cz.jzitnik.client.states.ScreenBuffer;
@@ -27,42 +28,57 @@ import static cz.jzitnik.client.events.handlers.DialogEventHandler.*;
 @UI
 @Dependency
 public class DialogUI {
+
     @InjectState
     private DialogState dialogState;
 
     @InjectState
     private TerminalState terminalState;
 
+    @InjectState
+    private ScreenBuffer screenBuffer;
+
+    @InjectState
+    private GameState gameState;
+
     @InjectDependency
     private TextRenderer textRenderer;
 
     @InjectDependency
     private EventManager eventManager;
 
-    @InjectState
-    private ScreenBuffer screenBuffer;
-
     @MouseHandler(MouseHandlerType.CLICK)
     public boolean handleClick(MouseAction mouseAction) {
         if (dialogState.getCurrentDialog() == null || dialogState.isRenderInProgress()) {
             return false;
         }
 
-        TerminalSize size = DialogEventHandler.getSize(textRenderer, dialogState.getCurrentDialog());
+        var dialog = dialogState.getCurrentDialog();
-        TerminalPosition start = DialogEventHandler.getStart(terminalState.getTerminalScreen().getTerminalSize(), size);
+        TerminalSize size = DialogEventHandler.getSize(textRenderer, dialog, gameState);
+        TerminalPosition start = DialogEventHandler.getStart(
+                terminalState.getTerminalScreen().getTerminalSize(),
+                size
+        );
 
-        if (!(dialogState.getCurrentDialog().getOnEnd() instanceof OnEnd.AskQuestion(
+        if (!(dialog.getOnEnd() instanceof OnEnd.AskQuestion askQuestion)) {
-                OnEnd.AskQuestion.Answer[] answers
-        ))) {
             setHoveredButtonIndex(-1);
             return false;
         }
 
+        var answers = askQuestion.answers(gameState);
+
         TerminalPosition mouse = mouseAction.getPosition();
-        TerminalPosition mouseNormalized = new TerminalPosition(mouse.getColumn(), mouse.getRow() * 2);
+        TerminalPosition mouseNormalized = new TerminalPosition(
+                mouse.getColumn(),
+                mouse.getRow() * 2
+        );
+
         RerenderScreen.ScreenPart part = new RerenderScreen.ScreenPart(
                 start,
-                new TerminalPosition(start.getColumn() + size.getColumns(), start.getRow() + size.getRows())
+                new TerminalPosition(
+                        start.getColumn() + size.getColumns(),
+                        start.getRow() + size.getRows()
+                )
         );
 
         if (!part.isWithin(mouseNormalized)) {
@@ -70,9 +86,13 @@ public class DialogUI {
             return false;
         }
 
-        int buttonsStartY = DialogEventHandler.getYStartButtons(textRenderer, dialogState.getCurrentDialog());
+        int buttonsStartY = DialogEventHandler.getYStartButtons(textRenderer, dialog);
-        TerminalPosition localPosition = new TerminalPosition(mouseNormalized.getColumn() - start.getColumn(), mouseNormalized.getRow() - start.getRow() - buttonsStartY);
+        TerminalPosition localPosition = new TerminalPosition(
-        int buttonsHeight = DialogEventHandler.calculateButtonHeight(dialogState.getCurrentDialog());
+                mouseNormalized.getColumn() - start.getColumn(),
+                mouseNormalized.getRow() - start.getRow() - buttonsStartY
+        );
+
+        int buttonsHeight = DialogEventHandler.calculateButtonHeight(dialog, gameState);
 
         if (localPosition.getRow() < 0 || localPosition.getRow() >= buttonsHeight) {
             setHoveredButtonIndex(-1);
@@ -82,23 +102,27 @@ public class DialogUI {
         int buttonIndex = localPosition.getRow() / (BUTTON_HEIGHT + BUTTON_PADDING);
         int rest = localPosition.getRow() % (BUTTON_HEIGHT + BUTTON_PADDING);
 
-        if (buttonIndex < answers.length && rest < BUTTON_HEIGHT && localPosition.getColumn() >= PADDING && localPosition.getColumn() < size.getColumns() - PADDING) {
+        if (buttonIndex < answers.length
-            for (int y = start.getRow(); y < start.getRow() + size.getRows(); y++) {
+                && rest < BUTTON_HEIGHT
-                for (int x = start.getColumn(); x < start.getColumn() + size.getColumns(); x++) {
+                && localPosition.getColumn() >= PADDING
-                    screenBuffer.getGlobalOverrideBuffer()[y][x] = new Empty();
+                && localPosition.getColumn() < size.getColumns() - PADDING) {
-                }
+
-            }
+            clearDialog(start, size);
 
             eventManager.emitEvent(
                     new Event[]{
                             new RerenderScreen(
                                     new RerenderScreen.ScreenPart(
                                             start,
-                                            new TerminalPosition(start.getColumn() + size.getColumns(), start.getRow() + size.getRows())
+                                            new TerminalPosition(
+                                                    start.getColumn() + size.getColumns(),
+                                                    start.getRow() + size.getRows()
+                                            )
                                     )
                             ),
-                            answers[buttonIndex].dialog(),
+                            answers[buttonIndex].dialog()
-                    });
+                    }
+            );
 
             return true;
         }
@@ -112,21 +136,32 @@ public class DialogUI {
             return false;
         }
 
-        TerminalSize size = DialogEventHandler.getSize(textRenderer, dialogState.getCurrentDialog());
+        var dialog = dialogState.getCurrentDialog();
-        TerminalPosition start = DialogEventHandler.getStart(terminalState.getTerminalScreen().getTerminalSize(), size);
+        TerminalSize size = DialogEventHandler.getSize(textRenderer, dialog, gameState);
+        TerminalPosition start = DialogEventHandler.getStart(
+                terminalState.getTerminalScreen().getTerminalSize(),
+                size
+        );
 
-        if (!(dialogState.getCurrentDialog().getOnEnd() instanceof OnEnd.AskQuestion(
+        if (!(dialog.getOnEnd() instanceof OnEnd.AskQuestion askQuestion)) {
-                OnEnd.AskQuestion.Answer[] answers
-        ))) {
             setHoveredButtonIndex(-1);
             return false;
         }
 
+        var answers = askQuestion.answers(gameState);
+
         TerminalPosition mouse = mouseAction.getPosition();
-        TerminalPosition mouseNormalized = new TerminalPosition(mouse.getColumn(), mouse.getRow() * 2);
+        TerminalPosition mouseNormalized = new TerminalPosition(
+                mouse.getColumn(),
+                mouse.getRow() * 2
+        );
+
         RerenderScreen.ScreenPart part = new RerenderScreen.ScreenPart(
                 start,
-                new TerminalPosition(start.getColumn() + size.getColumns(), start.getRow() + size.getRows())
+                new TerminalPosition(
+                        start.getColumn() + size.getColumns(),
+                        start.getRow() + size.getRows()
+                )
         );
 
         if (!part.isWithin(mouseNormalized)) {
@@ -134,9 +169,13 @@ public class DialogUI {
             return false;
         }
 
-        int buttonsStartY = DialogEventHandler.getYStartButtons(textRenderer, dialogState.getCurrentDialog());
+        int buttonsStartY = DialogEventHandler.getYStartButtons(textRenderer, dialog);
-        TerminalPosition localPosition = new TerminalPosition(mouseNormalized.getColumn() - start.getColumn(), mouseNormalized.getRow() - start.getRow() - buttonsStartY);
+        TerminalPosition localPosition = new TerminalPosition(
-        int buttonsHeight = DialogEventHandler.calculateButtonHeight(dialogState.getCurrentDialog());
+                mouseNormalized.getColumn() - start.getColumn(),
+                mouseNormalized.getRow() - start.getRow() - buttonsStartY
+        );
+
+        int buttonsHeight = DialogEventHandler.calculateButtonHeight(dialog, gameState);
 
         if (localPosition.getRow() < 0 || localPosition.getRow() >= buttonsHeight) {
             setHoveredButtonIndex(-1);
@@ -146,7 +185,11 @@ public class DialogUI {
         int buttonIndex = localPosition.getRow() / (BUTTON_HEIGHT + BUTTON_PADDING);
         int rest = localPosition.getRow() % (BUTTON_HEIGHT + BUTTON_PADDING);
 
-        if (buttonIndex < answers.length && rest < BUTTON_HEIGHT && localPosition.getColumn() >= PADDING && localPosition.getColumn() < size.getColumns() - PADDING) {
+        if (buttonIndex < answers.length
+                && rest < BUTTON_HEIGHT
+                && localPosition.getColumn() >= PADDING
+                && localPosition.getColumn() < size.getColumns() - PADDING) {
+
             setHoveredButtonIndex(buttonIndex);
             return true;
         }
@@ -161,4 +204,12 @@ public class DialogUI {
             eventManager.emitEvent(dialogState.getCurrentDialog());
         }
     }
+
+    private void clearDialog(TerminalPosition start, TerminalSize size) {
+        for (int y = start.getRow(); y < start.getRow() + size.getRows(); y++) {
+            for (int x = start.getColumn(); x < start.getColumn() + size.getColumns(); x++) {
+                screenBuffer.getGlobalOverrideBuffer()[y][x] = new Empty();
+            }
+        }
+    }
 }