Added runtime localization change support

- Label.update() now invokes requestReassembly() method

src/main/java/ru/windcorp/progressia/client/graphics/gui/Label.java

@@ -1,12 +1,12 @@
 package ru.windcorp.progressia.client.graphics.gui;
 
-import java.util.function.Supplier;
-
 import glm.mat._4.Mat4;
 import glm.vec._2.i.Vec2i;
 import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
 import ru.windcorp.progressia.client.graphics.font.Font;
 
+import java.util.function.Supplier;
+
 public class Label extends Component {
 	
 	private Font font;
@@ -28,6 +28,7 @@ public class Label extends Component {
 	public void update() {
 		currentText = contents.get();
 		currentSize = font.getSize(currentText, Integer.MAX_VALUE, null).mul(2);
+		requestReassembly();
 	}
 	
 	@Override

src/main/java/ru/windcorp/progressia/client/graphics/gui/LayerTestGUI.java

@@ -18,8 +18,8 @@
 package ru.windcorp.progressia.client.graphics.gui;
 
 import com.google.common.eventbus.Subscribe;
-
 import glm.vec._2.i.Vec2i;
+import org.lwjgl.glfw.GLFW;
 import ru.windcorp.progressia.client.graphics.Colors;
 import ru.windcorp.progressia.client.graphics.flat.RenderTarget;
 import ru.windcorp.progressia.client.graphics.font.Font;
@@ -28,6 +28,8 @@ import ru.windcorp.progressia.client.graphics.gui.layout.LayoutAlign;
 import ru.windcorp.progressia.client.graphics.gui.layout.LayoutVertical;
 import ru.windcorp.progressia.client.graphics.input.KeyEvent;
 import ru.windcorp.progressia.client.localization.Localizer;
+import ru.windcorp.progressia.client.localization.MutableString;
+import ru.windcorp.progressia.client.localization.MutableStringLocalized;
 
 public class LayerTestGUI extends GUILayer {
 	
@@ -51,7 +53,9 @@ public class LayerTestGUI extends GUILayer {
 		}
 		
 		private boolean onClicked(KeyEvent event) {
-			if (event.isPress() && event.isLeftMouseButton()) {
+			if (!event.isMouse()) {
+				return false;
+			} else if (event.isPress() && event.isLeftMouseButton()) {
 				System.out.println("You pressed a Component!");
 			}
 			return true;
@@ -81,12 +85,14 @@ public class LayerTestGUI extends GUILayer {
 
 		//Debug
 		Localizer.getInstance().setLanguage("ru-RU");
+		MutableString epsilon = new MutableStringLocalized("Epsilon")
+				.addListener(() -> ((Label)charlie.getChild(0)).update()).format(34, "thirty-four");
 		// These two are swapped in code due to a bug in layouts, fixing ATM
 		charlie.addChild(
 				new Label(
 						"Epsilon",
 						new Font().withColor(0x4444BB).deriveItalic(),
-						Localizer.getInstance().getValue("Epsilon")+"\u269b"
+						() -> epsilon.get().concat("\u269b")
 				)
 		);
 		charlie.addChild(
@@ -97,7 +103,22 @@ public class LayerTestGUI extends GUILayer {
 				)
 		);
 		panel.addChild(charlie);
-		
+
+
+		charlie.addListener(KeyEvent.class, e -> {
+			if(e.isPress() && e.getKey() == GLFW.GLFW_KEY_L) {
+				Localizer localizer = Localizer.getInstance();
+				if (localizer.getLanguage().equals("ru-RU")) {
+					localizer.setLanguage("en-US");
+				} else {
+					localizer.setLanguage("ru-RU");
+				}
+				return true;
+			} return false;
+		});
+		charlie.setFocusable(true);
+		charlie.takeFocus();
+
 		getRoot().addChild(panel);
 	}
 

src/main/java/ru/windcorp/progressia/client/localization/Localizer.java

@@ -64,6 +64,7 @@ public class Localizer {
 	}
 
 	private void pokeListeners(String newLanguage) {
+		//TODO extract as weak bus listener class
 		synchronized (listeners) {
 			Iterator<WeakReference<LocaleListener>> iterator = listeners.iterator();
 			while (iterator.hasNext()) {

src/main/java/ru/windcorp/progressia/client/localization/MutableString.java

@@ -0,0 +1,83 @@
+package ru.windcorp.progressia.client.localization;
+
+import java.lang.ref.WeakReference;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.function.Function;
+
+public abstract class MutableString {
+	public interface Listener {
+		void onUpdate();
+	}
+
+	protected String data;
+
+	protected final Collection<WeakReference<Listener>> listeners =
+			Collections.synchronizedCollection(new LinkedList<>());
+
+	protected void pokeListeners() {
+		//TODO extract as weak bus listener class
+		synchronized (listeners) {
+			Iterator<WeakReference<Listener>> iterator = listeners.iterator();
+			while (iterator.hasNext()) {
+				Listener listenerOrNull = iterator.next().get();
+				if (listenerOrNull == null) {
+					iterator.remove();
+				} else {
+					listenerOrNull.onUpdate();
+				}
+			}
+		}
+	}
+
+	public MutableString addListener(Listener listener) {
+		listeners.add(new WeakReference<>(listener));
+		return this;
+	}
+
+	public MutableString removeListener(Listener listener) {
+		listeners.removeIf(ref -> listener.equals(ref.get()));
+		return this;
+	}
+
+	protected void listen(Object obj) {
+		if (obj instanceof MutableString) {
+			((MutableString) obj).addListener(this::update);
+		}
+	}
+
+	public String get() {
+		if (data == null) {
+			data = compute();
+		}
+		return data;
+	}
+
+	public String toString() {
+		return get();
+	}
+
+	public MutableString apply(Function<String, String> f) {
+		return new MutableStringFunc(this, f);
+	}
+
+	public void update() {
+		data = compute();
+		pokeListeners();
+	}
+	protected abstract String compute();
+
+	public static MutableString formatted(Object format, Object... args) {
+		return new MutableStringFormatter(format, args);
+	}
+
+	public MutableString format(Object... args) {
+		return formatted(this, args);
+	}
+
+	public MutableString append(Object... objects) {
+		return new MutableStringConcat(this, objects);
+	}
+}

src/main/java/ru/windcorp/progressia/client/localization/MutableStringConcat.java

@@ -0,0 +1,25 @@
+package ru.windcorp.progressia.client.localization;
+
+public class MutableStringConcat extends MutableString {
+	private final Object part0;
+	private final Object[] parts;
+
+	public MutableStringConcat(Object object, Object... partsToConcat) {
+		this.part0 = object;
+		this.parts = partsToConcat;
+
+		listen(object);
+		for (Object part : partsToConcat) {
+			listen(part);
+		}
+	}
+
+	@Override
+	protected  String compute() {
+		StringBuilder sb = new StringBuilder(String.valueOf(part0));
+		for  (Object part : parts) {
+			sb.append(part);
+		}
+		return sb.toString();
+	}
+}

src/main/java/ru/windcorp/progressia/client/localization/MutableStringFormatter.java

@@ -0,0 +1,29 @@
+package ru.windcorp.progressia.client.localization;
+
+import java.util.IllegalFormatException;
+
+public class MutableStringFormatter extends MutableString {
+	private final Object format;
+	private final Object[] args;
+
+	public MutableStringFormatter(Object format, Object[] args) {
+		this.format = format;
+		this.args = args;
+		listen(format);
+
+		for (Object arg : args) {
+			listen(arg);
+		}
+	}
+
+	@Override
+	protected String compute() {
+		String format = this.format.toString();
+		try {
+			return String.format(format, this.args);
+		} catch (IllegalFormatException e) {
+			return format;
+		}
+	}
+
+}

src/main/java/ru/windcorp/progressia/client/localization/MutableStringFunc.java

@@ -0,0 +1,17 @@
+package ru.windcorp.progressia.client.localization;
+
+import java.util.function.Function;
+
+public class MutableStringFunc extends MutableStringParented {
+	private final Function<String, String> function;
+
+	public MutableStringFunc(MutableString parent, Function<String, String> f) {
+		super(parent);
+		this.function = f;
+	}
+
+	@Override
+	protected String compute() {
+		return function.apply(getParent().get());
+	}
+}

src/main/java/ru/windcorp/progressia/client/localization/MutableStringLocalized.java

@@ -0,0 +1,18 @@
+package ru.windcorp.progressia.client.localization;
+
+public class MutableStringLocalized extends MutableString {
+	private final String key;
+
+	LocaleListener listener = l -> update();
+
+	public MutableStringLocalized(String key) {
+		this.key = key;
+		Localizer.getInstance().addListener(listener);
+		update();
+	}
+
+	@Override
+	protected String compute() {
+		return Localizer.getInstance().getValue(key);
+	}
+}

src/main/java/ru/windcorp/progressia/client/localization/MutableStringParented.java

@@ -0,0 +1,14 @@
+package ru.windcorp.progressia.client.localization;
+
+public abstract class MutableStringParented  extends MutableString {
+	private final MutableString parent;
+
+	public MutableStringParented(MutableString parent) {
+		this.parent = parent;
+		listen(parent);
+	}
+
+	public MutableString getParent() {
+		return parent;
+	}
+}