Add support for Schema.org/Recipe

java/org/chromium/distiller/DomUtil.java

Index: java/org/chromium/distiller/DomUtil.java
diff --git a/java/org/chromium/distiller/DomUtil.java b/java/org/chromium/distiller/DomUtil.java
index b99f73df029ec3df3ddff1c0e62f472a3e3bebdf..ea3e348a1c712b8e52e36ad566f33f3998484cdf 100644
--- a/java/org/chromium/distiller/DomUtil.java
+++ b/java/org/chromium/distiller/DomUtil.java
@@ -15,6 +15,8 @@ import com.google.gwt.dom.client.NodeList;
 import com.google.gwt.dom.client.Style;
 import com.google.gwt.dom.client.VideoElement;
 import com.google.gwt.http.client.URL;
+import com.google.gwt.regexp.shared.MatchResult;
+import com.google.gwt.regexp.shared.RegExp;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -433,6 +435,38 @@ public class DomUtil {
         return nodes;
     }
 
+    public static String formatDuration(String duration) {

[wychen, 2016/03/14 22:58:42]

I18n and l10n might be difficult. Singular/plural forms are also tricky. These
"(s)" are not appealing. To get around these issues, why don't we just keep
what's shown in the tag instead of generating the text from structured data?

+        RegExp pattern = RegExp.compile("^P(?:([0-9]+)Y)?" +
+                "(?:([0-9]+)M)?(?:([0-9]+)W)?(?:([0-9]+)D)?" +
+                "(T(?:([0-9]+)H)?(?:([0-9]+)M)?(?:([0-9]+)S)?)?$", "i");
+        MatchResult matchResult = pattern.exec(duration);
+        List<String> result = new ArrayList<>();
+        if (matchResult != null) {
+            if (matchResult.getGroup(1) != null) {
+                result.add(matchResult.getGroup(1) + " year(s)");
+            }
+            if (matchResult.getGroup(2) != null) {
+                result.add(matchResult.getGroup(2) + " month(s)");
+            }
+            if (matchResult.getGroup(3) != null) {
+                result.add(matchResult.getGroup(3) + " week(s)");
+            }
+            if (matchResult.getGroup(4) != null) {
+                result.add(matchResult.getGroup(4) + " day(s)");
+            }
+            if (matchResult.getGroup(6) != null) {
+                result.add(matchResult.getGroup(6) + " hour(s)");
+            }
+            if (matchResult.getGroup(7) != null) {
+                result.add(matchResult.getGroup(7) + " minute(s)");
+            }
+            if (matchResult.getGroup(8) != null) {
+                result.add(matchResult.getGroup(8) + " second(s)");
+            }
+        }
+        return join(result.toArray(), " ");
+    }
+
     /**
      * Generate HTML/text output for a given node tree/subree. This will ignore hidden
      * elements.
@@ -461,4 +495,8 @@ public class DomUtil {
     public static native Element getFirstElementChild(Document document) /*-{
         return document.firstElementChild;
     }-*/;
+
+    public static native String join(Object[] list, String conjunction) /*-{
+      return list.join(conjunction);
+    }-*/;
 }