Implement basic virtual keyboard support

- Listener for clicks inside of text fields and other text-based screens
- Virtual keyboard screen in a QWERTY layout

common/src/main/java/eu/midnightdust/midnightcontrols/client/MidnightControlsClient.java

@@ -204,6 +204,7 @@ public class MidnightControlsClient extends MidnightControls {
         RainbowColor.tick();
         TouchInput.tick();
     }
+
     /**
      * Called when opening a screen.
      */

common/src/main/java/eu/midnightdust/midnightcontrols/client/gui/VirtualKeyboardScreen.java

@@ -0,0 +1,108 @@
+package eu.midnightdust.midnightcontrols.client.gui;
+
+import net.minecraft.client.gui.DrawContext;
+import net.minecraft.client.gui.widget.TextFieldWidget;
+import net.minecraft.text.Text;
+import org.thinkingstudio.obsidianui.Position;
+import org.thinkingstudio.obsidianui.SpruceTexts;
+import org.thinkingstudio.obsidianui.screen.SpruceScreen;
+import org.thinkingstudio.obsidianui.widget.SpruceButtonWidget;
+import org.thinkingstudio.obsidianui.widget.container.SpruceContainerWidget;
+
+public class VirtualKeyboardScreen extends SpruceScreen {
+    private SpruceContainerWidget container;
+    private TextFieldWidget bufferDisplay;
+    private final StringBuilder buffer;
+    private final CloseCallback closeCallback;
+
+    @FunctionalInterface
+    public interface CloseCallback {
+        void onClose(String text);
+    }
+
+    public VirtualKeyboardScreen(String initialText, CloseCallback closeCallback) {
+        super(Text.literal("Virtual Keyboard"));
+
+        this.buffer = new StringBuilder(initialText);
+        this.closeCallback = closeCallback;
+    }
+
+    @Override
+    protected void init() {
+        super.init();
+
+        this.bufferDisplay = new TextFieldWidget(this.textRenderer, this.width / 2 - 100, this.height / 4 - 40, 200, 20, Text.literal(""));
+        this.bufferDisplay.setEditable(false);
+        this.bufferDisplay.setMaxLength(1024);
+        this.bufferDisplay.setText(buffer.toString());
+        this.addDrawableChild(this.bufferDisplay);
+
+        rebuildKeyboard();
+
+        this.addDrawableChild(container);
+        this.addDrawableChild(new SpruceButtonWidget(Position.of(this, this.width / 2 - 50, this.height - 30), 100, 20, SpruceTexts.GUI_DONE, btn -> this.close()));
+    }
+
+    @Override
+    public void render(DrawContext drawContext, int mouseX, int mouseY, float delta) {
+        super.render(drawContext, mouseX, mouseY, delta);
+        drawContext.drawCenteredTextWithShadow(this.textRenderer, this.title, this.width / 2, 10, 0xFFFFFF);
+    }
+
+
+    private void rebuildKeyboard() {
+        this.container = new SpruceContainerWidget(Position.of(0, this.height / 4 - 10), this.width, this.height / 2);
+
+
+        var row1 = new String[]{"q", "w", "e", "r", "t", "y", "u", "i", "o", "p"};
+        var row2 = new String[]{"a", "s", "d", "f", "g", "h", "j", "k", "l"};
+        var row3 = new String[]{"z", "x", "c", "v", "b", "n", "m"};
+
+        addKeyRow(0, row1);
+        addKeyRow(1, row2);
+        addKeyRow(2, row3);
+    }
+
+    private void addKeyRow(int rowOffset, String... keys) {
+        int keyWidth = 20;
+        int spacing = 2;
+        int totalWidth = (keyWidth + spacing) * keys.length - spacing;
+        int startX = (this.width - totalWidth) / 2;
+        int y = this.height / 4 + rowOffset * 24;
+
+        for (int i = 0; i < keys.length; i++) {
+            String key = keys[i];
+            this.container.addChild(new SpruceButtonWidget(Position.of(startX + i * (keyWidth + spacing), y), keyWidth, 20, Text.literal(key), btn -> handleKeyPress(key)));
+        }
+    }
+
+    private void handleKeyPress(String key) {
+        if (this.client == null) return;
+
+        // TODO
+        if (key.equals("\b")) {
+            if (!buffer.isEmpty()) {
+                buffer.deleteCharAt(buffer.length() - 1);
+            }
+        } else {
+            buffer.append(key);
+        }
+
+        if (this.bufferDisplay != null) {
+            this.bufferDisplay.setText(buffer.toString());
+        }
+    }
+
+    @Override
+    public boolean shouldPause() {
+        return false;
+    }
+
+    @Override
+    public void close() {
+        super.close();
+        if (closeCallback != null) {
+            closeCallback.onClose(buffer.toString());
+        }
+    }
+}

common/src/main/java/eu/midnightdust/midnightcontrols/client/mixin/AbstractSignEditScreenAccessor.java

@@ -0,0 +1,15 @@
+package eu.midnightdust.midnightcontrols.client.mixin;
+
+import net.minecraft.block.entity.SignText;
+import net.minecraft.client.gui.screen.ingame.AbstractSignEditScreen;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(AbstractSignEditScreen.class)
+public interface AbstractSignEditScreenAccessor {
+    @Accessor("text")
+    SignText midnightcontrols$getText();
+
+    @Accessor("text")
+    void midnightcontrols$setText(SignText text);
+}

common/src/main/java/eu/midnightdust/midnightcontrols/client/mixin/BookEditScreenAccessor.java

@@ -0,0 +1,24 @@
+package eu.midnightdust.midnightcontrols.client.mixin;
+
+import net.minecraft.client.gui.screen.ingame.BookEditScreen;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+@Mixin(BookEditScreen.class)
+public interface BookEditScreenAccessor {
+    @Accessor("signing")
+    boolean midnightcontrols$isSigning();
+
+    @Accessor("title")
+    String midnightcontrols$getTitle();
+
+    @Accessor("title")
+    void midnightcontrols$setTitle(String title);
+
+    @Invoker("getCurrentPageContent")
+    String midnightcontrols$getCurrentPageContent();
+
+    @Invoker("setPageContent")
+    void midnightcontrols$setPageContent(String newContent);
+}

common/src/main/java/eu/midnightdust/midnightcontrols/client/mixin/CreativeInventoryScreenAccessor.java

@@ -58,4 +58,10 @@ public interface CreativeInventoryScreenAccessor {
      */
     @Invoker("hasScrollbar")
     boolean midnightcontrols$hasScrollbar();
+
+    /**
+     * Triggers searching the creative inventory from the current value of the internal {@link net.minecraft.client.gui.widget.TextFieldWidget}
+     */
+    @Invoker("search")
+    void midnightcontrols$search();
 }

common/src/main/resources/midnightcontrols.mixins.json

@@ -4,6 +4,7 @@
   "compatibilityLevel": "JAVA_21",
   "client": [
     "AdvancementsScreenAccessor",
+    "BookEditScreenAccessor",
     "ChatScreenMixin",
     "ClickableWidgetAccessor",
     "ClientPlayerEntityMixin",
@@ -22,6 +23,7 @@
     "RecipeBookScreenAccessor",
     "RecipeBookWidgetAccessor",
     "ScreenMixin",
+    "AbstractSignEditScreenAccessor",
     "TabNavigationWidgetAccessor",
     "WorldRendererMixin"
   ],