Added a forms() convenience method to Elements

This allows one to get at FormElements without casting.

src/main/java/org/jsoup/select/Elements.java

@@ -2,6 +2,7 @@
 
 import org.jsoup.helper.Validate;
 import org.jsoup.nodes.Element;
+import org.jsoup.nodes.FormElement;
 import org.jsoup.nodes.Node;
 
 import java.util.*;
@@ -487,6 +488,19 @@ public Elements traverse(NodeVisitor nodeVisitor) {
         return this;
     }
 
+    /**
+     * Get the {@link FormElement} forms from the selected elements, if any.
+     * @return a list of FormElements pulled from the matched elements. The list will be empty if the elements contain
+     * no forms.
+     */
+    public List<FormElement> forms() {
+        ArrayList<FormElement> forms = new ArrayList<FormElement>();
+        for (Element el: contents)
+            if (el instanceof FormElement)
+                forms.add((FormElement) el);
+        return forms;
+    }
+
     // implements List<Element> delegates:
     public int size() {return contents.size();}
 

src/test/java/org/jsoup/select/ElementsTest.java

@@ -3,8 +3,12 @@
 import org.jsoup.Jsoup;
 import org.jsoup.TextUtil;
 import org.jsoup.nodes.Document;
+import org.jsoup.nodes.FormElement;
 import org.jsoup.nodes.Node;
 import org.junit.Test;
+
+import java.util.List;
+
 import static org.junit.Assert.*;
 
 /**
@@ -252,4 +256,17 @@ public void tail(Node node, int depth) {
         });
         assertEquals("<div><p><#text></#text></p></div><div><#text></#text></div>", accum.toString());
     }
+
+    @Test public void forms() {
+        Document doc = Jsoup.parse("<form id=1><input name=q></form><div /><form id=2><input name=f></form>");
+        Elements els = doc.select("*");
+        assertEquals(9, els.size());
+
+        List<FormElement> forms = els.forms();
+        assertEquals(2, forms.size());
+        assertTrue(forms.get(0) != null);
+        assertTrue(forms.get(1) != null);
+        assertEquals("1", forms.get(0).id());
+        assertEquals("2", forms.get(1).id());
+    }
 }