--- /dev/null	2015-04-26 06:51:08.003313989 -0700
+++ new/jdk/src/jdk.internal.le/share/classes/jdk/internal/jline/console/completer/CandidateListCompletionHandler.java	2015-07-02 08:21:36.284694611 -0700
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2002-2012, the original author or authors.
+ *
+ * This software is distributable under the BSD license. See the terms of the
+ * BSD license in the documentation provided with this software.
+ *
+ * http://www.opensource.org/licenses/bsd-license.php
+ */
+package jdk.internal.jline.console.completer;
+
+import jdk.internal.jline.console.ConsoleReader;
+import jdk.internal.jline.console.CursorBuffer;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.ResourceBundle;
+import java.util.Set;
+
+/**
+ * A {@link CompletionHandler} that deals with multiple distinct completions
+ * by outputting the complete list of possibilities to the console. This
+ * mimics the behavior of the
+ * <a href="http://www.gnu.org/directory/readline.html">readline</a> library.
+ *
+ * @author <a href="mailto:mwp1@cornell.edu">Marc Prud'hommeaux</a>
+ * @author <a href="mailto:jason@planet57.com">Jason Dillon</a>
+ * @since 2.3
+ */
+public class CandidateListCompletionHandler
+    implements CompletionHandler
+{
+    // TODO: handle quotes and escaped quotes && enable automatic escaping of whitespace
+
+    public boolean complete(final ConsoleReader reader, final List<CharSequence> candidates, final int pos) throws
+        IOException
+    {
+        CursorBuffer buf = reader.getCursorBuffer();
+
+        // if there is only one completion, then fill in the buffer
+        if (candidates.size() == 1) {
+            CharSequence value = candidates.get(0);
+
+            // fail if the only candidate is the same as the current buffer
+            if (value.equals(buf.toString())) {
+                return false;
+            }
+
+            setBuffer(reader, value, pos);
+
+            return true;
+        }
+        else if (candidates.size() > 1) {
+            String value = getUnambiguousCompletions(candidates);
+            setBuffer(reader, value, pos);
+        }
+
+        printCandidates(reader, candidates);
+
+        // redraw the current console buffer
+        reader.drawLine();
+
+        return true;
+    }
+
+    public static void setBuffer(final ConsoleReader reader, final CharSequence value, final int offset) throws
+        IOException
+    {
+        while ((reader.getCursorBuffer().cursor > offset) && reader.backspace()) {
+            // empty
+        }
+
+        reader.putString(value);
+        reader.setCursorPosition(offset + value.length());
+    }
+
+    /**
+     * Print out the candidates. If the size of the candidates is greater than the
+     * {@link ConsoleReader#getAutoprintThreshold}, they prompt with a warning.
+     *
+     * @param candidates the list of candidates to print
+     */
+    public static void printCandidates(final ConsoleReader reader, Collection<CharSequence> candidates) throws
+        IOException
+    {
+        Set<CharSequence> distinct = new HashSet<CharSequence>(candidates);
+
+        if (distinct.size() > reader.getAutoprintThreshold()) {
+            //noinspection StringConcatenation
+            reader.print(Messages.DISPLAY_CANDIDATES.format(candidates.size()));
+            reader.flush();
+
+            int c;
+
+            String noOpt = Messages.DISPLAY_CANDIDATES_NO.format();
+            String yesOpt = Messages.DISPLAY_CANDIDATES_YES.format();
+            char[] allowed = {yesOpt.charAt(0), noOpt.charAt(0)};
+
+            while ((c = reader.readCharacter(allowed)) != -1) {
+                String tmp = new String(new char[]{(char) c});
+
+                if (noOpt.startsWith(tmp)) {
+                    reader.println();
+                    return;
+                }
+                else if (yesOpt.startsWith(tmp)) {
+                    break;
+                }
+                else {
+                    reader.beep();
+                }
+            }
+        }
+
+        // copy the values and make them distinct, without otherwise affecting the ordering. Only do it if the sizes differ.
+        if (distinct.size() != candidates.size()) {
+            Collection<CharSequence> copy = new ArrayList<CharSequence>();
+
+            for (CharSequence next : candidates) {
+                if (!copy.contains(next)) {
+                    copy.add(next);
+                }
+            }
+
+            candidates = copy;
+        }
+
+        reader.println();
+        reader.printColumns(candidates);
+    }
+
+    /**
+     * Returns a root that matches all the {@link String} elements of the specified {@link List},
+     * or null if there are no commonalities. For example, if the list contains
+     * <i>foobar</i>, <i>foobaz</i>, <i>foobuz</i>, the method will return <i>foob</i>.
+     */
+    private String getUnambiguousCompletions(final List<CharSequence> candidates) {
+        if (candidates == null || candidates.isEmpty()) {
+            return null;
+        }
+
+        // convert to an array for speed
+        String[] strings = candidates.toArray(new String[candidates.size()]);
+
+        String first = strings[0];
+        StringBuilder candidate = new StringBuilder();
+
+        for (int i = 0; i < first.length(); i++) {
+            if (startsWith(first.substring(0, i + 1), strings)) {
+                candidate.append(first.charAt(i));
+            }
+            else {
+                break;
+            }
+        }
+
+        return candidate.toString();
+    }
+
+    /**
+     * @return true is all the elements of <i>candidates</i> start with <i>starts</i>
+     */
+    private boolean startsWith(final String starts, final String[] candidates) {
+        for (String candidate : candidates) {
+            if (!candidate.startsWith(starts)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private static enum Messages
+    {
+        DISPLAY_CANDIDATES,
+        DISPLAY_CANDIDATES_YES,
+        DISPLAY_CANDIDATES_NO,;
+
+        private static final
+        ResourceBundle
+            bundle =
+            ResourceBundle.getBundle(CandidateListCompletionHandler.class.getName(), Locale.getDefault());
+
+        public String format(final Object... args) {
+            if (bundle == null)
+                return "";
+            else
+                return String.format(bundle.getString(name()), args);
+        }
+    }
+}