Add new implementation to accommodate Color and background helper

https://getbootstrap.com/docs/5.3/helpers/color-background/

bootstrap-core/src/main/java/de/agilecoders/wicket/core/markup/html/bootstrap/helpers/ColorAndBackgroundBehavior.java

@@ -0,0 +1,142 @@
+package de.agilecoders.wicket.core.markup.html.bootstrap.helpers;
+
+import org.apache.wicket.Component;
+import org.apache.wicket.markup.ComponentTag;
+
+import de.agilecoders.wicket.core.markup.html.bootstrap.behavior.BootstrapBaseBehavior;
+import de.agilecoders.wicket.core.util.Attributes;
+
+/**
+ * Color and background helpers combine the power of our .text-* utilities and .bg-* utilities in one class.
+ */
+public class ColorAndBackgroundBehavior extends BootstrapBaseBehavior {
+
+    /**
+     * Enumeration of all possible background colors.
+     */
+    public enum Color {
+        Primary("primary"),
+        Secondary("secondary"),
+        Success("success"),
+        Danger("danger"),
+        Warning("warning"),
+        Info("info"),
+        Light("light"),
+        Dark("dark");
+
+        private final String value;
+
+        Color(String value) {
+            this.value = value;
+        }
+
+        /**
+         * Css class associated with this background color.
+         * @return Css class associated with this background color.
+         */
+        public String cssClassName() {
+            return String.format("text-bg-%s", value);
+        }
+    }
+
+    /**
+     * Background color that should be added to component.
+     */
+    private Color color;
+
+
+    /**
+     * Constructs new instance for given color.
+     * @param color the background color that should be added to component.
+     */
+    public ColorAndBackgroundBehavior(Color color) {
+        this.color = color;
+    }
+
+    @Override
+    public void onComponentTag(Component component, ComponentTag tag) {
+        super.onComponentTag(component, tag);
+
+        Attributes.addClass(tag, color.cssClassName());
+    }
+
+    public void color(Color color) {
+        this.color = color;
+    }
+
+    public Color getColor() {
+        return this.color;
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Primary} to component
+     *
+     * @return behavior that adds primary background color to component
+     */
+    public static ColorAndBackgroundBehavior primary() {
+        return new ColorAndBackgroundBehavior(Color.Primary);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Secondary} to component
+     *
+     * @return behavior that adds secondary background color to component
+     */
+    public static ColorAndBackgroundBehavior secondary() {
+        return new ColorAndBackgroundBehavior(Color.Secondary);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Success} to component
+     *
+     * @return behavior that adds success background color to component
+     */
+    public static ColorAndBackgroundBehavior success() {
+        return new ColorAndBackgroundBehavior(Color.Success);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Danger} to component
+     *
+     * @return behavior that adds danger background color to component
+     */
+    public static ColorAndBackgroundBehavior danger() {
+        return new ColorAndBackgroundBehavior(Color.Danger);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Warning} to component
+     *
+     * @return behavior that adds warning background color to component
+     */
+    public static ColorAndBackgroundBehavior warning() {
+        return new ColorAndBackgroundBehavior(Color.Warning);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Info} to component
+     *
+     * @return behavior that adds info background color to component
+     */
+    public static ColorAndBackgroundBehavior info() {
+        return new ColorAndBackgroundBehavior(Color.Info);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Light} to component
+     *
+     * @return behavior that adds light background color to component
+     */
+    public static ColorAndBackgroundBehavior light() {
+        return new ColorAndBackgroundBehavior(Color.Light);
+    }
+
+    /**
+     * Constructs new behavior that adds {@link ColorAndBackgroundBehavior.Color#Dark} to component
+     *
+     * @return behavior that adds dark background color to component
+     */
+    public static ColorAndBackgroundBehavior dark() {
+        return new ColorAndBackgroundBehavior(Color.Dark);
+    }
+}