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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.maven.jline;
20  
21  import java.util.function.Consumer;
22  
23  import org.apache.maven.api.services.MessageBuilder;
24  import org.apache.maven.api.services.MessageBuilderFactory;
25  import org.jline.jansi.AnsiConsole;
26  import org.jline.reader.LineReader;
27  import org.jline.reader.LineReaderBuilder;
28  import org.jline.terminal.Terminal;
29  import org.jline.terminal.TerminalBuilder;
30  
31  public class MessageUtils {
32  
33      static Terminal terminal;
34      static LineReader reader;
35      static MessageBuilderFactory messageBuilderFactory = new JLineMessageBuilderFactory();
36      static boolean colorEnabled = true;
37      static Thread shutdownHook;
38      static final Object STARTUP_SHUTDOWN_MONITOR = new Object();
39  
40      public static void systemInstall(Terminal terminal) {
41          MessageUtils.terminal = terminal;
42          MessageUtils.reader = createReader(terminal);
43      }
44  
45      public static void systemInstall() {
46          systemInstall(null, null);
47      }
48  
49      public static void systemInstall(Consumer<TerminalBuilder> builderConsumer, Consumer<Terminal> terminalConsumer) {
50          MessageUtils.terminal = new FastTerminal(
51                  () -> {
52                      TerminalBuilder builder =
53                              TerminalBuilder.builder().name("Maven").dumb(true);
54                      if (builderConsumer != null) {
55                          builderConsumer.accept(builder);
56                      }
57                      return builder.build();
58                  },
59                  terminal -> {
60                      MessageUtils.reader = createReader(terminal);
61                      AnsiConsole.setTerminal(terminal);
62                      AnsiConsole.systemInstall();
63                      if (terminalConsumer != null) {
64                          terminalConsumer.accept(terminal);
65                      }
66                  });
67      }
68  
69      private static LineReader createReader(Terminal terminal) {
70          return LineReaderBuilder.builder().terminal(terminal).build();
71      }
72  
73      public static void registerShutdownHook() {
74          if (shutdownHook == null) {
75              shutdownHook = new Thread(() -> {
76                  synchronized (MessageUtils.STARTUP_SHUTDOWN_MONITOR) {
77                      MessageUtils.doSystemUninstall();
78                  }
79              });
80              Runtime.getRuntime().addShutdownHook(shutdownHook);
81          }
82      }
83  
84      public static void systemUninstall() {
85          doSystemUninstall();
86          if (shutdownHook != null) {
87              try {
88                  Runtime.getRuntime().removeShutdownHook(shutdownHook);
89              } catch (IllegalStateException var3) {
90                  // ignore
91              }
92          }
93      }
94  
95      private static void doSystemUninstall() {
96          try {
97              AnsiConsole.systemUninstall();
98          } finally {
99              terminal = null;
100         }
101     }
102 
103     public static void setColorEnabled(boolean enabled) {
104         colorEnabled = enabled;
105     }
106 
107     public static boolean isColorEnabled() {
108         return colorEnabled && terminal != null;
109     }
110 
111     public static int getTerminalWidth() {
112         return terminal != null ? terminal.getWidth() : -1;
113     }
114 
115     public static MessageBuilder builder() {
116         return messageBuilderFactory.builder();
117     }
118 
119     public static Terminal getTerminal() {
120         return terminal;
121     }
122 }