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8164825: jshell tool: Completion for subcommand
Reviewed-by: jlahoda
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...s/src/jdk.jshell/share/classes/jdk/internal/jshell/tool/ContinuousCompletionProvider.java
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| /* | ||
| * 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; | ||
|
|
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| class ContinuousCompletionProvider implements CompletionProvider { | ||
|
|
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| static final BiPredicate<String, String> STARTSWITH_MATCHER = | ||
| (word, input) -> word.startsWith(input); | ||
| static final BiPredicate<String, String> PERFECT_MATCHER = | ||
| (word, input) -> word.equals(input); | ||
|
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| private final Supplier<Map<String, CompletionProvider>> wordCompletionProviderSupplier; | ||
| private final BiPredicate<String, String> matcher; | ||
|
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| ContinuousCompletionProvider( | ||
| Map<String, CompletionProvider> wordCompletionProvider, | ||
| BiPredicate<String, String> matcher) { | ||
| this(() -> wordCompletionProvider, matcher); | ||
| } | ||
|
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| ContinuousCompletionProvider( | ||
| Supplier<Map<String, CompletionProvider>> wordCompletionProviderSupplier, | ||
| BiPredicate<String, String> matcher) { | ||
| this.wordCompletionProviderSupplier = wordCompletionProviderSupplier; | ||
| this.matcher = matcher; | ||
| } | ||
|
|
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| @Override | ||
| public List<Suggestion> completionSuggestions(String input, int cursor, int[] anchor) { | ||
| String prefix = input.substring(0, cursor); | ||
| int space = prefix.indexOf(' '); | ||
|
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| Stream<SourceCodeAnalysis.Suggestion> result; | ||
|
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| Map<String, CompletionProvider> wordCompletionProvider = wordCompletionProviderSupplier.get(); | ||
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| 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); | ||
|
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| 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; | ||
| } | ||
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| return result.sorted(comparing(Suggestion::continuation)) | ||
| .collect(toList()); | ||
| } | ||
|
|
||
| } |
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