Add attributes to self closing element

1 files changed, 25 insertions, 1 deletions

diff --git a/src/main/java/org/zwobble/mammoth/html/HtmlWriter.java b/src/main/java/org/zwobble/mammoth/html/HtmlWriter.java
index fdf1e6c..4262e03 100644
--- a/src/main/java/org/zwobble/mammoth/html/HtmlWriter.java
+++ b/src/main/java/org/zwobble/mammoth/html/HtmlWriter.java
@@ -1,11 +1,35 @@
 package org.zwobble.mammoth.html;
 
+import com.google.common.base.Function;
+import com.google.common.collect.Ordering;
+
+import java.util.List;
+import java.util.Map;
+
 public class HtmlWriter {
     public static String escapeText(String text) {
         return text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;");
     }
 
-    public static String escapeAttributeValue(String value) {
+    private static String escapeAttributeValue(String value) {
         return escapeText(value).replace("\"", "&quot;");
     }
+
+    public static void generateAttributes(Map<String, String> attributes, StringBuilder builder) {
+        List<Map.Entry<String, String>> sortedAttributes = orderBy(Map.Entry<String, String>::getKey)
+            .sortedCopy(attributes.entrySet());
+
+        for (Map.Entry<String, String> attribute : sortedAttributes) {
+            builder
+                .append(" ")
+                .append(attribute.getKey())
+                .append("=\"")
+                .append(HtmlWriter.escapeAttributeValue(attribute.getValue()))
+                .append("\"");
+        }
+    }
+
+    private static <T, R extends Comparable<R>> Ordering<T> orderBy(Function<T, R> getKey) {
+        return Ordering.from((first, second) -> getKey.apply(first).compareTo(getKey.apply(second)));
+    }
 }