| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.jshell.tool; |
| |
| import java.util.List; |
| import static java.util.Comparator.comparing; |
| import java.util.Map; |
| import java.util.function.BiPredicate; |
| import java.util.function.Supplier; |
| import static java.util.stream.Collectors.toList; |
| import java.util.stream.Stream; |
| import jdk.internal.jshell.tool.JShellTool.CompletionProvider; |
| import jdk.jshell.SourceCodeAnalysis; |
| import jdk.jshell.SourceCodeAnalysis.Suggestion; |
| |
| class ContinuousCompletionProvider implements CompletionProvider { |
| |
| static final BiPredicate<String, String> STARTSWITH_MATCHER = String::startsWith; |
| static final BiPredicate<String, String> PERFECT_MATCHER = String::equals; |
| |
| private final Supplier<Map<String, CompletionProvider>> wordCompletionProviderSupplier; |
| private final BiPredicate<String, String> matcher; |
| |
| ContinuousCompletionProvider( |
| Map<String, CompletionProvider> wordCompletionProvider, |
| BiPredicate<String, String> matcher) { |
| this(() -> wordCompletionProvider, matcher); |
| } |
| |
| ContinuousCompletionProvider( |
| Supplier<Map<String, CompletionProvider>> wordCompletionProviderSupplier, |
| BiPredicate<String, String> matcher) { |
| this.wordCompletionProviderSupplier = wordCompletionProviderSupplier; |
| this.matcher = matcher; |
| } |
| |
| @Override |
| public List<Suggestion> completionSuggestions(String input, int cursor, int[] anchor) { |
| String prefix = input.substring(0, cursor); |
| int space = prefix.indexOf(' '); |
| |
| Stream<SourceCodeAnalysis.Suggestion> result; |
| |
| Map<String, CompletionProvider> wordCompletionProvider = wordCompletionProviderSupplier.get(); |
| |
| if (space == (-1)) { |
| result = wordCompletionProvider.keySet().stream() |
| .distinct() |
| .filter(key -> key.startsWith(prefix)) |
| .map(key -> new JShellTool.ArgSuggestion(key + " ")); |
| anchor[0] = 0; |
| } else { |
| String rest = prefix.substring(space + 1); |
| String word = prefix.substring(0, space); |
| |
| List<CompletionProvider> candidates = wordCompletionProvider.entrySet().stream() |
| .filter(e -> matcher.test(e.getKey(), word)) |
| .map(Map.Entry::getValue) |
| .collect(toList()); |
| if (candidates.size() == 1) { |
| result = candidates.get(0).completionSuggestions(rest, cursor - space - 1, anchor).stream(); |
| } else { |
| result = Stream.empty(); |
| } |
| anchor[0] += space + 1; |
| } |
| |
| return result.sorted(comparing(Suggestion::continuation)) |
| .collect(toList()); |
| } |
| |
| } |