Console.java revision 1384:5beae9dfcdb9 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.nashorn.tools.jjs;
27
28import java.io.File;
29import java.io.IOException;
30import java.io.InputStream;
31import java.io.PrintStream;
32import java.util.ArrayList;
33import java.util.Arrays;
34import java.util.Collections;
35import java.util.Iterator;
36import java.util.List;
37import jdk.internal.jline.NoInterruptUnixTerminal;
38import jdk.internal.jline.Terminal;
39import jdk.internal.jline.TerminalFactory;
40import jdk.internal.jline.TerminalFactory.Flavor;
41import jdk.internal.jline.WindowsTerminal;
42import jdk.internal.jline.console.ConsoleReader;
43import jdk.internal.jline.console.completer.Completer;
44import jdk.internal.jline.console.history.FileHistory;
45
46class Console implements AutoCloseable {
47    private final ConsoleReader in;
48    private final FileHistory history;
49
50    Console(final InputStream cmdin, final PrintStream cmdout, final File historyFile,
51            final Completer completer) throws IOException {
52        in = new ConsoleReader(cmdin, cmdout);
53        TerminalFactory.registerFlavor(Flavor.WINDOWS, JJSWindowsTerminal :: new);
54        TerminalFactory.registerFlavor(Flavor.UNIX, JJSUnixTerminal :: new);
55        in.setExpandEvents(false);
56        in.setHandleUserInterrupt(true);
57        in.setBellEnabled(true);
58        in.setHistory(history = new FileHistory(historyFile));
59        in.addCompleter(completer);
60        Runtime.getRuntime().addShutdownHook(new Thread((Runnable)this::saveHistory));
61    }
62
63    String readLine(final String prompt) throws IOException {
64        return in.readLine(prompt);
65    }
66
67    @Override
68    public void close() {
69        saveHistory();
70    }
71
72    private void saveHistory() {
73        try {
74            getHistory().flush();
75        } catch (final IOException exp) {}
76    }
77
78    FileHistory getHistory() {
79        return (FileHistory) in.getHistory();
80    }
81
82    boolean terminalEditorRunning() {
83        Terminal terminal = in.getTerminal();
84        if (terminal instanceof JJSUnixTerminal) {
85            return ((JJSUnixTerminal) terminal).isRaw();
86        }
87        return false;
88    }
89
90    void suspend() {
91        try {
92            in.getTerminal().restore();
93        } catch (Exception ex) {
94            throw new IllegalStateException(ex);
95        }
96    }
97
98    void resume() {
99        try {
100            in.getTerminal().init();
101        } catch (Exception ex) {
102            throw new IllegalStateException(ex);
103        }
104    }
105
106    static final class JJSUnixTerminal extends NoInterruptUnixTerminal {
107        JJSUnixTerminal() throws Exception {
108        }
109
110        boolean isRaw() {
111            try {
112                return getSettings().get("-a").contains("-icanon");
113            } catch (IOException | InterruptedException ex) {
114                return false;
115            }
116        }
117
118        @Override
119        public void disableInterruptCharacter() {
120        }
121
122        @Override
123        public void enableInterruptCharacter() {
124        }
125    }
126
127    static final class JJSWindowsTerminal extends WindowsTerminal {
128        public JJSWindowsTerminal() throws Exception {
129        }
130
131        @Override
132        public void init() throws Exception {
133            super.init();
134            setAnsiSupported(false);
135        }
136    }
137}
138