Create working scaffolding of Component Inflater

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/base/BaseWidget.java

@@ -53,17 +53,17 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setWidth(float width) {
+   public void setWidth(Float width) {
       this.width = width;
    }
 
    @Override
-   public void setHeight(float height) {
+   public void setHeight(Float height) {
       this.height = height;
    }
 
    @Override
-   public void setSize(float width, float height) {
+   public void setSize(Float width, Float height) {
       this.width = width;
       this.height = height;
    }
@@ -115,23 +115,23 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setX(float x) {
+   public void setX(Float x) {
       this.x = x;
    }
 
    @Override
-   public void setY(float y) {
+   public void setY(Float y) {
       this.y = y;
    }
 
    @Override
-   public void setPosition(float x, float y) {
+   public void setPosition(Float x, Float y) {
       this.x = x;
       this.y = y;
    }
 
    @Override
-   public void setMargin(float top, float right, float bottom, float left) {
+   public void setMargin(Float top, Float right, Float bottom, Float left) {
       this.marginTop = top;
       this.marginRight = right;
       this.marginBottom = bottom;
@@ -139,7 +139,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setMargin(float top, float rightLeft, float bottom) {
+   public void setMargin(Float top, Float rightLeft, Float bottom) {
       this.marginTop = top;
       this.marginRight = rightLeft;
       this.marginBottom = bottom;
@@ -147,7 +147,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setMargin(float topBottom, float rightLeft) {
+   public void setMargin(Float topBottom, Float rightLeft) {
       this.marginTop = topBottom;
       this.marginRight = rightLeft;
       this.marginBottom = topBottom;
@@ -155,7 +155,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setMargin(float all) {
+   public void setMargin(Float all) {
       this.marginTop = all;
       this.marginRight = all;
       this.marginBottom = all;
@@ -163,22 +163,22 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setMarginTop(float margin) {
+   public void setMarginTop(Float margin) {
       this.marginTop = margin;
    }
 
    @Override
-   public void setMarginRight(float margin) {
+   public void setMarginRight(Float margin) {
       this.marginRight = margin;
    }
 
    @Override
-   public void setMarginBottom(float margin) {
+   public void setMarginBottom(Float margin) {
       this.marginBottom = margin;
    }
 
    @Override
-   public void setMarginLeft(float margin) {
+   public void setMarginLeft(Float margin) {
       this.marginLeft = margin;
    }
 
@@ -203,7 +203,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setPadding(float top, float right, float bottom, float left) {
+   public void setPadding(Float top, Float right, Float bottom, Float left) {
       this.paddingTop = top;
       this.paddingRight = right;
       this.paddingBottom = bottom;
@@ -211,7 +211,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setPadding(float top, float rightLeft, float bottom) {
+   public void setPadding(Float top, Float rightLeft, Float bottom) {
       this.paddingTop = top;
       this.paddingRight = rightLeft;
       this.paddingBottom = bottom;
@@ -219,7 +219,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setPadding(float topBottom, float rightLeft) {
+   public void setPadding(Float topBottom, Float rightLeft) {
       this.paddingTop = topBottom;
       this.paddingRight = rightLeft;
       this.paddingBottom = topBottom;
@@ -227,7 +227,7 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setPadding(float all) {
+   public void setPadding(Float all) {
       this.paddingTop = all;
       this.paddingRight = all;
       this.paddingBottom = all;
@@ -235,22 +235,22 @@ public abstract class BaseWidget implements Widget {
    }
 
    @Override
-   public void setPaddingTop(float padding) {
+   public void setPaddingTop(Float padding) {
       this.paddingTop = padding;
    }
 
    @Override
-   public void setPaddingRight(float padding) {
+   public void setPaddingRight(Float padding) {
       this.paddingRight = padding;
    }
 
    @Override
-   public void setPaddingBottom(float padding) {
+   public void setPaddingBottom(Float padding) {
       this.paddingBottom = padding;
    }
 
    @Override
-   public void setPaddingLeft(float padding) {
+   public void setPaddingLeft(Float padding) {
       this.paddingLeft = padding;
    }
 

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/base/Widget.java

@@ -12,11 +12,11 @@ public interface Widget extends KeyEventHandler {
 
    float getY();
 
-   void setX(float x);
+   void setX(Float x);
 
-   void setY(float y);
+   void setY(Float y);
 
-   void setPosition(float x, float y);
+   void setPosition(Float x, Float y);
 
    float getWidth();
 
@@ -26,11 +26,11 @@ public interface Widget extends KeyEventHandler {
 
    float getActualHeight();
 
-   void setWidth(float width);
+   void setWidth(Float width);
 
-   void setHeight(float height);
+   void setHeight(Float height);
 
-   void setSize(float width, float height);
+   void setSize(Float width, Float height);
 
    SizeMode getWidthMode();
 
@@ -42,21 +42,21 @@ public interface Widget extends KeyEventHandler {
 
    void setSizeMode(SizeMode widthMode, SizeMode heightMode);
 
-   void setMargin(float top, float right, float bottom, float left);
+   void setMargin(Float top, Float right, Float bottom, Float left);
 
-   void setMargin(float top, float rightLeft, float bottom);
+   void setMargin(Float top, Float rightLeft, Float bottom);
 
-   void setMargin(float topBottom, float rightLeft);
+   void setMargin(Float topBottom, Float rightLeft);
 
-   void setMargin(float all);
+   void setMargin(Float all);
 
-   void setMarginTop(float margin);
+   void setMarginTop(Float margin);
 
-   void setMarginRight(float margin);
+   void setMarginRight(Float margin);
 
-   void setMarginBottom(float margin);
+   void setMarginBottom(Float margin);
 
-   void setMarginLeft(float margin);
+   void setMarginLeft(Float margin);
 
    float getMarginTop();
 
@@ -66,21 +66,21 @@ public interface Widget extends KeyEventHandler {
 
    float getMarginLeft();
 
-   void setPadding(float top, float right, float bottom, float left);
+   void setPadding(Float top, Float right, Float bottom, Float left);
 
-   void setPadding(float top, float rightLeft, float bottom);
+   void setPadding(Float top, Float rightLeft, Float bottom);
 
-   void setPadding(float topBottom, float rightLeft);
+   void setPadding(Float topBottom, Float rightLeft);
 
-   void setPadding(float all);
+   void setPadding(Float all);
 
-   void setPaddingTop(float padding);
+   void setPaddingTop(Float padding);
 
-   void setPaddingRight(float padding);
+   void setPaddingRight(Float padding);
 
-   void setPaddingBottom(float padding);
+   void setPaddingBottom(Float padding);
 
-   void setPaddingLeft(float padding);
+   void setPaddingLeft(Float padding);
 
    float getPaddingTop();
 

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/component/BaseComponent.java

@@ -2,9 +2,26 @@ package com.bartlomiejpluta.base.api.game.gui.component;
 
 import com.bartlomiejpluta.base.api.game.gui.base.BaseWidget;
 
+import static java.util.Collections.emptyList;
+
 public abstract class BaseComponent extends BaseWidget implements Component {
    protected boolean focused;
 
+   @Override
+   public Iterable<Component> getChildren() {
+      return emptyList();
+   }
+
+   @Override
+   public void add(Component component) {
+      throw new UnsupportedOperationException();
+   }
+
+   @Override
+   public void remove(Component component) {
+      throw new UnsupportedOperationException();
+   }
+
    @Override
    public boolean isFocused() {
       return focused;

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/component/BaseContainer.java

@@ -5,8 +5,16 @@ import com.bartlomiejpluta.base.api.game.input.KeyEvent;
 import java.util.LinkedList;
 import java.util.List;
 
+import static java.util.Collections.unmodifiableList;
+
 public abstract class BaseContainer extends BaseComponent implements Container {
    protected final List<Component> children = new LinkedList<>();
+   private final List<Component> readOnlyChildren = unmodifiableList(children);
+
+   @Override
+   public Iterable<Component> getChildren() {
+      return readOnlyChildren;
+   }
 
    @Override
    public void add(Component component) {

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/component/Component.java

@@ -3,6 +3,12 @@ package com.bartlomiejpluta.base.api.game.gui.component;
 import com.bartlomiejpluta.base.api.game.gui.base.Widget;
 
 public interface Component extends Widget {
+   Iterable<Component> getChildren();
+
+   void add(Component component);
+
+   void remove(Component component);
+
    boolean isFocused();
 
    void focus();

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/component/Container.java

@@ -1,7 +1,4 @@
 package com.bartlomiejpluta.base.api.game.gui.component;
 
 public interface Container extends Component {
-   void add(Component component);
-
-   void remove(Component component);
 }

api/src/main/java/com/bartlomiejpluta/base/api/game/gui/component/Label.java

@@ -7,23 +7,27 @@ import com.bartlomiejpluta.base.api.game.screen.Screen;
 import static java.util.Objects.requireNonNull;
 
 public class Label extends BaseComponent {
-   private final GUI gui;
+//   private final GUI gui;
 
    private String text = "";
    private String font;
    private float fontSize;
    private int alignment = GUI.ALIGN_LEFT;
-   private final Color color;
+   private Color color;
 
    private final float[] bounds = new float[4];
 
-   public Label(GUI gui, String font) {
+   public Label() {
-      this.gui = requireNonNull(gui);
-      this.font = requireNonNull(font);
 
-      this.color = this.gui.createColor();
    }
 
+//   public Label(GUI gui, String font) {
+//      this.gui = requireNonNull(gui);
+//      this.font = requireNonNull(font);
+//
+//      this.color = this.gui.createColor();
+//   }
+
    public String getText() {
       return text;
    }
@@ -44,7 +48,7 @@ public class Label extends BaseComponent {
       return fontSize;
    }
 
-   public void setFontSize(float fontSize) {
+   public void setFontSize(Float fontSize) {
       this.fontSize = fontSize;
    }
 
@@ -52,7 +56,7 @@ public class Label extends BaseComponent {
       return alignment;
    }
 
-   public void setAlignment(int alignment) {
+   public void setAlignment(Integer alignment) {
       this.alignment = alignment;
    }
 
@@ -60,7 +64,7 @@ public class Label extends BaseComponent {
       return color.getRed();
    }
 
-   public void setRed(float value) {
+   public void setRed(Float value) {
       color.setRed(value);
    }
 
@@ -68,7 +72,7 @@ public class Label extends BaseComponent {
       return color.getGreen();
    }
 
-   public void setGreen(float value) {
+   public void setGreen(Float value) {
       color.setGreen(value);
    }
 
@@ -76,7 +80,7 @@ public class Label extends BaseComponent {
       return color.getBlue();
    }
 
-   public void setBlue(float value) {
+   public void setBlue(Float value) {
       color.setBlue(value);
    }
 
@@ -84,15 +88,15 @@ public class Label extends BaseComponent {
       return color.getAlpha();
    }
 
-   public void setAlpha(float value) {
+   public void setAlpha(Float value) {
       color.setAlpha(value);
    }
 
-   public void setColor(float red, float green, float blue, float alpha) {
+   public void setColor(Float red, Float green, Float blue, Float alpha) {
       color.setRGBA(red, green, blue, alpha);
    }
 
-   public void setColor(float red, float green, float blue) {
+   public void setColor(Float red, Float green, Float blue) {
       color.setRGB(red, green, blue);
    }
 
@@ -116,4 +120,9 @@ public class Label extends BaseComponent {
       gui.fill();
       gui.putTextBox(x + paddingLeft, y + paddingTop, getWidth() - paddingLeft - paddingRight, text, bounds);
    }
+
+   @Override
+   public String toString() {
+      return "Label[" + text + "]";
+   }
 }

engine/build.gradle

@@ -86,6 +86,9 @@ dependencies {
     compileOnly 'org.projectlombok:lombok'
     annotationProcessor 'org.projectlombok:lombok'
 
+    implementation "org.codehaus.janino:janino:${janinoVersion}"
+    implementation "org.codehaus.janino:commons-compiler:${janinoVersion}"
+
     // This dependency is used by the application.
     implementation "org.joml:joml:${jomlVersion}"
 }

engine/src/main/java/com/bartlomiejpluta/base/engine/gui/widget/ScreenWidget.java

@@ -58,32 +58,32 @@ public class ScreenWidget implements Widget {
    }
 
    @Override
-   public void setX(float x) {
+   public void setX(Float x) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setY(float y) {
+   public void setY(Float y) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPosition(float x, float y) {
+   public void setPosition(Float x, Float y) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setWidth(float width) {
+   public void setWidth(Float width) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setHeight(float height) {
+   public void setHeight(Float height) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setSize(float width, float height) {
+   public void setSize(Float width, Float height) {
       throw new UnsupportedOperationException();
    }
 
@@ -113,42 +113,42 @@ public class ScreenWidget implements Widget {
    }
 
    @Override
-   public void setMargin(float top, float right, float bottom, float left) {
+   public void setMargin(Float top, Float right, Float bottom, Float left) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMargin(float top, float rightLeft, float bottom) {
+   public void setMargin(Float top, Float rightLeft, Float bottom) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMargin(float topBottom, float rightLeft) {
+   public void setMargin(Float topBottom, Float rightLeft) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMargin(float all) {
+   public void setMargin(Float all) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMarginTop(float margin) {
+   public void setMarginTop(Float margin) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMarginRight(float margin) {
+   public void setMarginRight(Float margin) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMarginBottom(float margin) {
+   public void setMarginBottom(Float margin) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setMarginLeft(float margin) {
+   public void setMarginLeft(Float margin) {
       throw new UnsupportedOperationException();
    }
 
@@ -173,42 +173,42 @@ public class ScreenWidget implements Widget {
    }
 
    @Override
-   public void setPadding(float top, float right, float bottom, float left) {
+   public void setPadding(Float top, Float right, Float bottom, Float left) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPadding(float top, float rightLeft, float bottom) {
+   public void setPadding(Float top, Float rightLeft, Float bottom) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPadding(float topBottom, float rightLeft) {
+   public void setPadding(Float topBottom, Float rightLeft) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPadding(float all) {
+   public void setPadding(Float all) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPaddingTop(float padding) {
+   public void setPaddingTop(Float padding) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPaddingRight(float padding) {
+   public void setPaddingRight(Float padding) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPaddingBottom(float padding) {
+   public void setPaddingBottom(Float padding) {
       throw new UnsupportedOperationException();
    }
 
    @Override
-   public void setPaddingLeft(float padding) {
+   public void setPaddingLeft(Float padding) {
       throw new UnsupportedOperationException();
    }
 

engine/src/main/java/com/bartlomiejpluta/base/engine/gui/xml/inflater/ComponentInflater.java

@@ -0,0 +1,126 @@
+package com.bartlomiejpluta.base.engine.gui.xml.inflater;
+
+import com.bartlomiejpluta.base.api.game.gui.base.GUI;
+import com.bartlomiejpluta.base.api.game.gui.base.SizeMode;
+import com.bartlomiejpluta.base.api.game.gui.component.Component;
+import com.bartlomiejpluta.base.engine.util.reflection.ClassLoader;
+import lombok.SneakyThrows;
+import org.codehaus.janino.ExpressionEvaluator;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import java.io.File;
+import java.io.InputStream;
+import java.util.stream.Stream;
+
+@org.springframework.stereotype.Component
+public class ComponentInflater {
+   private static final String[] IMPORTS = Stream.of(GUI.class, SizeMode.class).map(Class::getCanonicalName).toArray(String[]::new);
+   private final DocumentBuilder builder;
+   private final ClassLoader loader;
+
+   @Autowired
+   @SneakyThrows
+   public ComponentInflater(ClassLoader loader) {
+      this.loader = loader;
+
+      var factory = DocumentBuilderFactory.newInstance();
+      factory.setNamespaceAware(true);
+      this.builder = factory.newDocumentBuilder();
+   }
+
+   @SneakyThrows
+   public Component inflate(String xml) {
+      var document = builder.parse(xml);
+      return parseNode(document.getDocumentElement());
+   }
+
+   @SneakyThrows
+   public Component inflate(File file) {
+      var document = builder.parse(file);
+      return parseNode(document.getDocumentElement());
+   }
+
+   @SneakyThrows
+   public Component inflate(InputStream is) {
+      var document = builder.parse(is);
+      return parseNode(document.getDocumentElement());
+   }
+
+   @SneakyThrows
+   private Component parseNode(Node node) {
+      var uri = node.getNamespaceURI();
+      var name = node.getLocalName();
+
+      if (uri != null) {
+         name = uri + "." + name;
+      }
+
+      var canonicalName = name.replaceAll("\\*", "").replaceAll("\\.+", ".");
+
+      var componentClass = loader.loadClass(canonicalName);
+      var component = createComponent(componentClass, node.getAttributes());
+
+      var children = node.getChildNodes();
+
+      // The component is text-like node (e.g. <Label>Some text</Label>)
+      if (children.getLength() == 1) {
+         var child = children.item(0);
+         if (child.getNodeType() == Node.TEXT_NODE) {
+            var textSetter = componentClass.getMethod("setText", String.class);
+            textSetter.invoke(component, child.getNodeValue());
+            return component;
+         }
+      }
+
+      // The component has non-text children (e.g. <HLayout><Label>Some text</Label></HLayout>)
+      for (int i = 0; i < children.getLength(); ++i) {
+         var childNode = children.item(i);
+
+         if (childNode.getNodeType() != Node.ELEMENT_NODE) {
+            continue;
+         }
+
+         component.add(parseNode(childNode));
+      }
+
+      return component;
+   }
+
+   @SneakyThrows
+   private Component createComponent(Class<?> componentClass, NamedNodeMap attributes) {
+      var component = (Component) componentClass.getConstructor().newInstance();
+
+      // Set attributes via setter methods
+      for (int i = 0; i < attributes.getLength(); ++i) {
+         var attribute = attributes.item(i);
+
+         // Ignore namespaces definitions
+         if ("xmlns".equals(attribute.getPrefix())) {
+            continue;
+         }
+
+         var setterName = createSetterMethodName(attribute.getLocalName());
+         var value = parseValue(attribute.getNodeValue());
+         var setter = componentClass.getMethod(setterName, value.getClass());
+         setter.invoke(component, value);
+      }
+
+      return component;
+   }
+
+   private static String createSetterMethodName(String name) {
+      return "set" + name.substring(0, 1).toUpperCase() + name.substring(1);
+   }
+
+   @SneakyThrows
+   private Object parseValue(String value) {
+      var evaluator = new ExpressionEvaluator();
+      evaluator.setDefaultImports(IMPORTS);
+      evaluator.cook(value);
+      return evaluator.evaluate();
+   }
+}