Added Abbreviate renderers

lib/src/main/java/rife/render/Abbreviate.java

@@ -0,0 +1,61 @@
+/*
+ *  Copyright 2023 the original author or authors.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ */
+
+package rife.render;
+
+import rife.template.Template;
+import rife.template.ValueRenderer;
+
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.Properties;
+
+/**
+ * <p>Abbreviate a template value with ellipses.</p>
+ *
+ * <p>Usage:</p>
+ *
+ * <pre>
+ *   &lt;!--v render:rife.render.Abbreviate:valueId/--&gt;
+ *   {{v render:rife.render.Abbreviate:valueId/}}
+ * </pre>
+ *
+ * @author <a href="https://erik.thauvin.net/">Erik C. Thauvin</a>
+ * @see <a href="https://github.com/rife2/rife2-template-renderers/wiki/rife.render.Abbreviate">rife.render.Abbreviate</a>
+ * @since 1.0
+ */
+public class Abbreviate implements ValueRenderer {
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String render(Template template, String valueId, String differentiator) {
+        var mark = "...";
+        var max = 0;
+        if (template.hasDefaultValue(valueId)) {
+            var properties = new Properties();
+            try {
+                properties.load(new StringReader(template.getDefaultValue(valueId)));
+                mark = properties.getProperty("mark", mark);
+                max = Integer.parseInt(properties.getProperty("max", String.valueOf(max)));
+            } catch (IOException | NumberFormatException ignore) {
+                // do nothing
+            }
+        }
+        return RenderUtils.abbreviate(template.getValueOrAttribute(differentiator), max, mark);
+    }
+}