001 /*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019 package org.crsh.shell.impl.command.system;
020
021 import org.crsh.cli.Argument;
022 import org.crsh.cli.Command;
023 import org.crsh.cli.Usage;
024 import org.crsh.cli.descriptor.ParameterDescriptor;
025 import org.crsh.cli.spi.Completion;
026 import org.crsh.command.BaseCommand;
027 import org.crsh.command.InvocationContext;
028 import org.crsh.command.ScriptException;
029 import org.crsh.lang.spi.Language;
030 import org.crsh.lang.impl.script.ScriptRepl;
031 import org.crsh.lang.spi.Repl;
032 import org.crsh.shell.impl.command.ShellSession;
033 import org.crsh.text.Color;
034 import org.crsh.text.Decoration;
035 import org.crsh.text.Style;
036 import org.crsh.text.ui.LabelElement;
037 import org.crsh.text.ui.TableElement;
038
039 import java.util.LinkedHashMap;
040 import java.util.Map;
041
042 /** @author Julien Viet */
043 public class repl extends BaseCommand implements ReplCompleter {
044
045 @Usage("list the repl or change the current repl")
046 @Command
047 public void main(
048 InvocationContext<Object> context,
049 @Argument(completer = ReplCompleter.class)
050 @Usage("the optional repl name")
051 String name) throws Exception {
052 ShellSession session = (ShellSession)context.getSession();
053 Repl current = session.getRepl();
054 if (name != null) {
055 if (name.equals(current.getLanguage().getName())) {
056 context.provide("Using repl " + name);
057 } else {
058 Repl found = null;
059 for (Language lang : session.getContext().getPlugins(Language.class)) {
060 if (lang.getName().equals(name)) {
061 if (lang.isActive()) {
062 found = lang.getRepl();
063 if (found != null) {
064 break;
065 } else {
066 throw new ScriptException("Language " + name + " does not provide a repl");
067 }
068 } else {
069 throw new ScriptException("Language " + name + " not active");
070 }
071 }
072 }
073 if (found != null) {
074 session.setRepl(found);
075 context.provide("Using repl " + name);
076 } else {
077 throw new ScriptException("Repl " + name + " not found");
078 }
079 }
080 } else {
081
082 //
083 LinkedHashMap<Repl, Boolean> repls = new LinkedHashMap<Repl, Boolean>();
084 repls.put(ScriptRepl.getInstance(), true);
085 for (Language lang : session.getContext().getPlugins(Language.class)) {
086 Repl repl = lang.getRepl();
087 if (repl != null) {
088 repls.put(repl, lang.isActive());
089 }
090 }
091
092 //
093 TableElement table = new TableElement().rightCellPadding(1);
094 table.row(
095 new LabelElement("NAME").style(Style.style(Decoration.bold)),
096 new LabelElement("DISPLAY NAME"),
097 new LabelElement("DESCRIPTION"),
098 new LabelElement("ACTIVE")
099 );
100 for (Map.Entry<Repl, Boolean> entry : repls.entrySet()) {
101 Boolean active = entry.getValue();
102 String langDescription = entry.getKey().getDescription();
103 String langDisplayName = entry.getKey().getLanguage().getDisplayName();
104 String langName = entry.getKey().getLanguage().getName();
105 table.row(
106 new LabelElement(langName).style(Style.style(Color.red)),
107 new LabelElement(langDisplayName != null ? langDisplayName : ""),
108 new LabelElement(langDescription != null ? langDescription : ""),
109 new LabelElement(active)
110 );
111 }
112
113 //
114 context.provide(new LabelElement("Current repl is " + current.getLanguage().getName() + "available repl are:\n"));
115 context.provide(table);
116 }
117 }
118
119 @Override
120 public Completion complete(ParameterDescriptor parameter, String prefix) throws Exception {
121 ShellSession session = (ShellSession)context.getSession();
122 Completion.Builder builder = Completion.builder(prefix);
123 for (Language lang : session.getContext().getPlugins(Language.class)) {
124 if (lang.isActive()) {
125 if (lang.getRepl() != null) {
126 String name = lang.getName();
127 if (name.startsWith(prefix)) {
128 builder.add(name.substring(prefix.length()), true);
129 }
130 }
131 }
132 }
133 return builder.build();
134 }
135 }