org/jsampler/DefaultLSConsoleModel.java

/*
 *   JSampler - a java front-end for LinuxSampler
 *
 *   Copyright (C) 2005-2008 Grigor Iliev <grigor@grigoriliev.com>
 *
 *   This file is part of JSampler.
 *
 *   JSampler is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2
 *   as published by the Free Software Foundation.
 *
 *   JSampler 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 for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with JSampler; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *   MA  02111-1307  USA
 */

package org.jsampler;

import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import java.net.Socket;

import java.util.LinkedList;
import java.util.Vector;

import java.util.logging.Level;

import net.sf.juife.PDUtils;
import net.sf.juife.event.GenericEvent;
import net.sf.juife.event.GenericListener;
import net.sf.juife.event.TaskEvent;
import net.sf.juife.event.TaskListener;

import org.jsampler.event.LSConsoleEvent;
import org.jsampler.event.LSConsoleListener;

import org.jsampler.task.LSConsoleConnect;

import static org.jsampler.JSI18n.i18n;


/**
 * This class provides default implementation of the <code>LSConsoleModel</code> interface.
 * @author Grigor Iliev
 */
public class DefaultLSConsoleModel implements LSConsoleModel {
        private Socket socket;
        private LscpOutputStream out;
        
        private final String[] cmdList = LscpUtils.getCommandList();
        
        private String cmdLine = "";
        
        /**
         * Contains the global command history, excluding blank lines and comments.
         */
        private final LinkedList<String> cmdHistory = new LinkedList<String>();
        
        private int cmdHistoryIdx = -1;
        
        private int commandHistorySize = 1000;
        
        private final LSConsoleThread lsConsoleThread = new LSConsoleThread();
        
        /**
         * Contains the command history of the current
         * session, including blank lines and comments.
         */
        private final Vector<String> sessionHistory = new Vector<String>();
        
        /** Used to hold the current command when browsing through command history, etc. */
        private String currentCmd = "";
        
        private final Vector<LSConsoleListener> listeners = new Vector<LSConsoleListener>();
        
        
        /** Creates a new instance of <code>DefaultLSConsoleModel</code>. */
        public
        DefaultLSConsoleModel() {
                CC.addReconnectListener(new GenericListener() {
                        public void
                        jobDone(GenericEvent e) { reconnect(); }
                });
                
                lsConsoleThread.start();
        }
        
        private Socket
        getSocket() { return socket; }
        
        private void
        setSocket(Socket socket) { this.socket = socket; }
        
        private void
        reconnect() {
                final LSConsoleConnect cnt = new LSConsoleConnect(getSocket());
                
                cnt.addTaskListener(new TaskListener() {
                        public void
                        taskPerformed(TaskEvent e) { changeSocket(cnt.getResult()); }
                });
                
                CC.getTaskQueue().add(cnt);
        }
        
        public void
        disconnect() {
                try { if(getSocket() != null) getSocket().close(); }
                catch(Exception x) { CC.getLogger().info(HF.getErrorMessage(x)); }
        }
        
        private void
        changeSocket(Socket sock) {
                setSocket(sock);
                
                try {
                        LscpInputStream in;
                        in = sock == null ? null : new LscpInputStream(sock.getInputStream());
                        out = sock == null ? null : new LscpOutputStream(sock.getOutputStream());
                        
                        lsConsoleThread.setInputStream(in);
                } catch(Exception x) { CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x); }
        }
        
        /**
         * Registers the specified listener for receiving event messages.
         * @param l The <code>LSConsoleListener</code> to register.
         */
        @Override
        public void
        addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
        
        /**
         * Removes the specified listener.
         * @param l The <code>LSConsoleListener</code> to remove.
         */
        @Override
        public void
        removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
        
        /** Executes the command specified in the command line. */
        @Override
        public void
        execCommand() {
                String cmd = getCommandLineText();
                sessionHistory.add(cmd);
                if(cmd.trim().length() > 0 && !cmd.startsWith("#")) addToCommandHistory(cmd);
                while(cmdHistory.size() > getCommandHistorySize()) cmdHistory.removeFirst();
                
                setCommandLineText("");
                currentCmd = "";
                cmdHistoryIdx = -1;
                
                if( getSocket() == null || getSocket().isClosed() || !getSocket().isConnected() 
                        || getSocket().isOutputShutdown() || out == null ) {
                        
                        fireResponseReceived(i18n.getMessage("DefaultLSConsoleModel.notConnected"));
                } else {
                        CC.getTaskQueue().add(new LSConsoleExecCommand(cmd));
                }
                
                fireCommandExecuted();
        }
        
        /**
         * Gets the last executed command.
         * @return The last command executed in the LS Console.
         */
        @Override
        public String
        getLastExecutedCommand() {
                int size = sessionHistory.size();
                return size == 0 ? "" : sessionHistory.get(size - 1);
        }
        
        /**
         * Sets the text in the command line.
         * @param cmdLine The new command line text.
         */
        @Override
        public void
        setCommandLineText(String cmdLine) {
                if(this.cmdLine.equals(cmdLine)) return;
                
                String oldCmdLine = this.cmdLine;
                this.cmdLine = cmdLine;
                fireCommandLineTextChanged(oldCmdLine);
        }
        
        /**
         * Gets the text in the command line.
         * @return The command line's text.
         */
        @Override
        public String
        getCommandLineText() { return cmdLine; }
        
        /**
         * Gets the command history of the current session, including blank lines and comments.
         * @return The command history of the current session, including blank lines and comments.
         */
        @Override
        public String[]
        getSessionHistory() {
                return sessionHistory.toArray(new String[sessionHistory.size()]);
        }
        
        /**
         * Clears the session history.
         * @see #getSessionHistory
         */
        @Override
        public void
        clearSessionHistory() { sessionHistory.removeAllElements(); }
        
        /**
         * Adds the specified <code>command</code> to command history.
         * @param command The command to be added to command history.
         */
        @Override
        public void
        addToCommandHistory(String command) { cmdHistory.add(command); }
        
        /**
         * Gets the complete command history, excluding blank lines and comments.
         * @return The complete command history, excluding blank lines and comments.
         */
        @Override
        public String[]
        getCommandHistory() {
                return cmdHistory.toArray(new String[cmdHistory.size()]);
        }
        
        /**
         * Clears the complete/multisession command history.
         * @see #getCommandHistory
         */
        @Override
        public void
        clearCommandHistory() {
                cmdHistory.clear();
                cmdHistoryIdx = -1;
        }
        
        /**
         * Determines the maximum number of lines to be kept in the command history.
         * @return The maximum number of lines to be kept in the command history.
         */
        @Override
        public int
        getCommandHistorySize() { return commandHistorySize; }
        
        /**
         * Sets the maximum number of lines to be kept in the command history.
         * @param size Determines the maximum number of lines to be kept in the command history.
         */
        @Override
        public void
        setCommandHistorySize(int size) { commandHistorySize = size; }
        
        /**
         * Gets a list of all LSCP commands.
         * @return A list of all LSCP commands.
         */
        @Override
        public String[]
        getCommandList() { return cmdList; }
        
        /** Browses the command history one line up. */
        @Override
        public void
        browseCommandHistoryUp() {
                if(cmdHistory.size() == 0) return;
                        
                if(cmdHistoryIdx == -1) {
                        currentCmd = getCommandLineText();
                        cmdHistoryIdx = cmdHistory.size() - 1;
                        setCommandLineText(cmdHistory.get(cmdHistoryIdx));
                        return;
                }
                
                if(cmdHistoryIdx == 0) return;
                
                setCommandLineText(cmdHistory.get(--cmdHistoryIdx));
        }
        
        /** Browses the command history one line down. */
        @Override
        public void
        browseCommandHistoryDown() {
                if(cmdHistory.size() == 0 || cmdHistoryIdx == -1) return;
                if(cmdHistoryIdx == cmdHistory.size() - 1) {
                        cmdHistoryIdx = -1;
                        setCommandLineText(currentCmd);
                        currentCmd = "";
                        return;
                }
                
                setCommandLineText(cmdHistory.get(++cmdHistoryIdx));
        }
        
        /** Browses to the first line of the command history. */
        @Override
        public void
        browseCommandHistoryFirst() {
                if(cmdHistory.size() == 0) return;
                cmdHistoryIdx = 0;
                setCommandLineText(cmdHistory.get(cmdHistoryIdx));
        }
        
        /** Browses to the last line of the command history. */
        @Override
        public void
        browseCommandHistoryLast() {
                if(cmdHistory.size() == 0) return;
                cmdHistoryIdx = cmdHistory.size() - 1;
                setCommandLineText(cmdHistory.get(cmdHistoryIdx));
        }
        
        private Vector<String> tmpVector = new Vector<String>();
        
        /**
         * Searches the command history for commands
         * containing the string returned by {@link #getCommandLineText}.
         * @return All commands that contains the string returned by {@link #getCommandLineText}.
         * @see #getCommandHistory
         */
        @Override
        public String[]
        searchCommandHistory() { return searchCommandHistory(getCommandLineText()); }
        
        /**
         * Searches the command history for commands containing <code>substring</code>.
         * @param substring The substring to be used to perform the search.
         * @return All commands that contains <code>substring</code>.
         * @see #getCommandList
         */
        @Override
        public String[]
        searchCommandHistory(String substring) {
                tmpVector.removeAllElements();
                for(String s : cmdHistory) if(s.indexOf(substring) != -1) tmpVector.add(s);
                
                return tmpVector.toArray(new String[tmpVector.size()]);
        }
        
        /**
         * Searches the LSCP command list for commands
         * containing the string returned by {@link #getCommandLineText}.
         * @return All commands that contains the string returned by {@link #getCommandLineText}.
         * @see #getCommandList
         */
        @Override
        public String[]
        searchCommandList() { return searchCommandList(getCommandLineText()); }
        
        /**
         * Searches the LSCP command list for commands containing <code>substring</code>.
         * @param substring The substring to be used to perform the search.
         * @return All commands that contains <code>substring</code>.
         * @see #getCommandList
         */
        @Override
        public String[]
        searchCommandList(String substring) {
                tmpVector.removeAllElements();
                for(String s : cmdList) if(s.indexOf(substring) != -1) tmpVector.add(s);
                
                return tmpVector.toArray(new String[tmpVector.size()]);
        }
        
        public void
        quit() { disconnect(); }
        
        /** Notifies listeners that the text in the command line has changed. */
        private void
        fireCommandLineTextChanged(String oldCmdLine) {
                LSConsoleEvent e = new LSConsoleEvent(this, null, oldCmdLine);
                for(LSConsoleListener l : listeners) l.commandLineTextChanged(e);
        }
        
        /** Notifies listeners that the command in the command line has been executed. */
        private void
        fireCommandExecuted() {
                LSConsoleEvent e = new LSConsoleEvent(this);
                for(LSConsoleListener l : listeners) l.commandExecuted(e);
        }
        
        /**
         * Notifies listeners that response is received from LinuxSampler.
         * @param response The response received from LinuxSampler.
         */
        private void
        fireResponseReceived(final String response) {
                PDUtils.runOnUiThread(new Runnable() {
                        public void
                        run() {
                                LSConsoleEvent e = new LSConsoleEvent(this, response);
                                for(LSConsoleListener l : listeners) l.responseReceived(e);
                        }
                });
        }
        
        /** Executes LS Console command. */
        private class LSConsoleExecCommand extends org.jsampler.task.EnhancedTask {
                private String cmd;
                
                /** Creates a new instance of <code>LSConsoleExecCommand</code>. */
                public
                LSConsoleExecCommand(String cmd) {
                        setTitle("LSConsoleExecCommand_task");
                        setDescription(i18n.getMessage("LSConsoleExecCommand.description"));
                        this.cmd = cmd;
                }
        
                /** The entry point of the task. */
                public void
                exec() throws Exception { out.writeLine(cmd); }
        }

        class LSConsoleThread extends Thread {
                LscpInputStream in;
                private boolean terminate = false;
                
                LSConsoleThread() {super("LS-Console-Thread"); }
                
                @Override
                public void
                run() {
                        while(!mustTerminate()) {
                                try { processInput(); }
                                catch(Exception x) {
                                        CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
                                }
                                
                                try { synchronized(this) { wait(100); } }
                                catch(Exception x) {
                                        CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
                                }
                        }
                }
        
                private synchronized boolean
                mustTerminate() { return terminate; }
                
                public synchronized void
                terminate() {
                        terminate = true;
                        this.notifyAll();
                }
                
                /** Processes the input sent by LinuxSampler */
                private synchronized void
                processInput() throws IOException {
                        while(in != null && in.available() > 0) {
                                String response = in.readLine();
                                fireResponseReceived(response); 
                        }
                }
                
                public synchronized void
                setInputStream(LscpInputStream in) { this.in = in; }
        }
        
        class LscpInputStream {
                private InputStream in;
                private StringBuffer buf = new StringBuffer();
                
                /**
                 * Creates a new instance of LscpInputStream.
                 *
                 */
                public
                LscpInputStream(InputStream in) {
                        this.in = in;
                }
        
                /**
                 * Reads a line. 
                 * This method is thread safe.
                 * 
                 * @return A string containing the next line readed from the stream or
                 * <code>null</code> if the end of the stream has been reached.
                 * @throws IOException If an I/O error occurs.
                 */
                public synchronized String
                readLine() throws IOException {
                        int i;
                        buf.setLength(0);
                
                        while((i = in.read()) != -1) {
                                if(i == '\r') {
                                        checkLF();
                                        break;
                                }
                                buf.append((char)i);
                        }
                
                        if(i == -1) {
                                if(buf.length() > 0)
                                        throw new IOException("Unexpected end of line!");
                                return null;
                        }
                        return buf.toString();
                }
        
                /**
                 * Returns the number of bytes that can
                 * be read from this input stream without blocking.
                 *
                 * @return The number of bytes that can
                 * be read from this input stream without blocking.
                 * @throws IOException If an I/O error occurs.
                 */
                public synchronized int
                available() throws IOException { return in.available(); }
        
                private void
                checkLF() throws IOException {
                        int i = in.read();
                        if(i == -1) throw new IOException("Unexpected end of file!");
                        if(i != '\n') throw new IOException("Unexpected end of line!");
                }
        }
        
        class LscpOutputStream {
                private OutputStream out;
        
                /** Creates a new instance of LscpOutputStream */
                public
                LscpOutputStream(OutputStream out) { this.out = out; }
        
                /*
                 * Writes a line.
                 * @param line a string to be written.
                 */
                public void
                writeLine(String line) throws IOException {
                        try {
                                out.write(line.getBytes("US-ASCII"));
                                out.write('\r');
                                out.write('\n');
                                out.flush();
                        } catch(UnsupportedEncodingException x) { 
                                CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
                        }
                }
        }
}
1	/*
2	* JSampler - a java front-end for LinuxSampler
3	*
4	* Copyright (C) 2005-2008 Grigor Iliev <grigor@grigoriliev.com>
5	*
6	* This file is part of JSampler.
7	*
8	* JSampler is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License version 2
10	* as published by the Free Software Foundation.
11	*
12	* JSampler is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with JSampler; if not, write to the Free Software
19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20	* MA 02111-1307 USA
21	*/
22
23	package org.jsampler;
24
25	import java.io.InputStream;
26	import java.io.IOException;
27	import java.io.OutputStream;
28	import java.io.UnsupportedEncodingException;
29
30	import java.net.Socket;
31
32	import java.util.LinkedList;
33	import java.util.Vector;
34
35	import java.util.logging.Level;
36
37	import net.sf.juife.PDUtils;
38	import net.sf.juife.event.GenericEvent;
39	import net.sf.juife.event.GenericListener;
40	import net.sf.juife.event.TaskEvent;
41	import net.sf.juife.event.TaskListener;
42
43	import org.jsampler.event.LSConsoleEvent;
44	import org.jsampler.event.LSConsoleListener;
45
46	import org.jsampler.task.LSConsoleConnect;
47
48	import static org.jsampler.JSI18n.i18n;
49
50
51	/**
52	* This class provides default implementation of the <code>LSConsoleModel</code> interface.
53	* @author Grigor Iliev
54	*/
55	public class DefaultLSConsoleModel implements LSConsoleModel {
56	private Socket socket;
57	private LscpOutputStream out;
58
59	private final String[] cmdList = LscpUtils.getCommandList();
60
61	private String cmdLine = "";
62
63	/**
64	* Contains the global command history, excluding blank lines and comments.
65	*/
66	private final LinkedList<String> cmdHistory = new LinkedList<String>();
67
68	private int cmdHistoryIdx = -1;
69
70	private int commandHistorySize = 1000;
71
72	private final LSConsoleThread lsConsoleThread = new LSConsoleThread();
73
74	/**
75	* Contains the command history of the current
76	* session, including blank lines and comments.
77	*/
78	private final Vector<String> sessionHistory = new Vector<String>();
79
80	/** Used to hold the current command when browsing through command history, etc. */
81	private String currentCmd = "";
82
83	private final Vector<LSConsoleListener> listeners = new Vector<LSConsoleListener>();
84
85
86	/** Creates a new instance of <code>DefaultLSConsoleModel</code>. */
87	public
88	DefaultLSConsoleModel() {
89	CC.addReconnectListener(new GenericListener() {
90	public void
91	jobDone(GenericEvent e) { reconnect(); }
92	});
93
94	lsConsoleThread.start();
95	}
96
97	private Socket
98	getSocket() { return socket; }
99
100	private void
101	setSocket(Socket socket) { this.socket = socket; }
102
103	private void
104	reconnect() {
105	final LSConsoleConnect cnt = new LSConsoleConnect(getSocket());
106
107	cnt.addTaskListener(new TaskListener() {
108	public void
109	taskPerformed(TaskEvent e) { changeSocket(cnt.getResult()); }
110	});
111
112	CC.getTaskQueue().add(cnt);
113	}
114
115	public void
116	disconnect() {
117	try { if(getSocket() != null) getSocket().close(); }
118	catch(Exception x) { CC.getLogger().info(HF.getErrorMessage(x)); }
119	}
120
121	private void
122	changeSocket(Socket sock) {
123	setSocket(sock);
124
125	try {
126	LscpInputStream in;
127	in = sock == null ? null : new LscpInputStream(sock.getInputStream());
128	out = sock == null ? null : new LscpOutputStream(sock.getOutputStream());
129
130	lsConsoleThread.setInputStream(in);
131	} catch(Exception x) { CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x); }
132	}
133
134	/**
135	* Registers the specified listener for receiving event messages.
136	* @param l The <code>LSConsoleListener</code> to register.
137	*/
138	@Override
139	public void
140	addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
141
142	/**
143	* Removes the specified listener.
144	* @param l The <code>LSConsoleListener</code> to remove.
145	*/
146	@Override
147	public void
148	removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
149
150	/** Executes the command specified in the command line. */
151	@Override
152	public void
153	execCommand() {
154	String cmd = getCommandLineText();
155	sessionHistory.add(cmd);
156	if(cmd.trim().length() > 0 && !cmd.startsWith("#")) addToCommandHistory(cmd);
157	while(cmdHistory.size() > getCommandHistorySize()) cmdHistory.removeFirst();
158
159	setCommandLineText("");
160	currentCmd = "";
161	cmdHistoryIdx = -1;
162
163	if( getSocket() == null \|\| getSocket().isClosed() \|\| !getSocket().isConnected()
164	\|\| getSocket().isOutputShutdown() \|\| out == null ) {
165
166	fireResponseReceived(i18n.getMessage("DefaultLSConsoleModel.notConnected"));
167	} else {
168	CC.getTaskQueue().add(new LSConsoleExecCommand(cmd));
169	}
170
171	fireCommandExecuted();
172	}
173
174	/**
175	* Gets the last executed command.
176	* @return The last command executed in the LS Console.
177	*/
178	@Override
179	public String
180	getLastExecutedCommand() {
181	int size = sessionHistory.size();
182	return size == 0 ? "" : sessionHistory.get(size - 1);
183	}
184
185	/**
186	* Sets the text in the command line.
187	* @param cmdLine The new command line text.
188	*/
189	@Override
190	public void
191	setCommandLineText(String cmdLine) {
192	if(this.cmdLine.equals(cmdLine)) return;
193
194	String oldCmdLine = this.cmdLine;
195	this.cmdLine = cmdLine;
196	fireCommandLineTextChanged(oldCmdLine);
197	}
198
199	/**
200	* Gets the text in the command line.
201	* @return The command line's text.
202	*/
203	@Override
204	public String
205	getCommandLineText() { return cmdLine; }
206
207	/**
208	* Gets the command history of the current session, including blank lines and comments.
209	* @return The command history of the current session, including blank lines and comments.
210	*/
211	@Override
212	public String[]
213	getSessionHistory() {
214	return sessionHistory.toArray(new String[sessionHistory.size()]);
215	}
216
217	/**
218	* Clears the session history.
219	* @see #getSessionHistory
220	*/
221	@Override
222	public void
223	clearSessionHistory() { sessionHistory.removeAllElements(); }
224
225	/**
226	* Adds the specified <code>command</code> to command history.
227	* @param command The command to be added to command history.
228	*/
229	@Override
230	public void
231	addToCommandHistory(String command) { cmdHistory.add(command); }
232
233	/**
234	* Gets the complete command history, excluding blank lines and comments.
235	* @return The complete command history, excluding blank lines and comments.
236	*/
237	@Override
238	public String[]
239	getCommandHistory() {
240	return cmdHistory.toArray(new String[cmdHistory.size()]);
241	}
242
243	/**
244	* Clears the complete/multisession command history.
245	* @see #getCommandHistory
246	*/
247	@Override
248	public void
249	clearCommandHistory() {
250	cmdHistory.clear();
251	cmdHistoryIdx = -1;
252	}
253
254	/**
255	* Determines the maximum number of lines to be kept in the command history.
256	* @return The maximum number of lines to be kept in the command history.
257	*/
258	@Override
259	public int
260	getCommandHistorySize() { return commandHistorySize; }
261
262	/**
263	* Sets the maximum number of lines to be kept in the command history.
264	* @param size Determines the maximum number of lines to be kept in the command history.
265	*/
266	@Override
267	public void
268	setCommandHistorySize(int size) { commandHistorySize = size; }
269
270	/**
271	* Gets a list of all LSCP commands.
272	* @return A list of all LSCP commands.
273	*/
274	@Override
275	public String[]
276	getCommandList() { return cmdList; }
277
278	/** Browses the command history one line up. */
279	@Override
280	public void
281	browseCommandHistoryUp() {
282	if(cmdHistory.size() == 0) return;
283
284	if(cmdHistoryIdx == -1) {
285	currentCmd = getCommandLineText();
286	cmdHistoryIdx = cmdHistory.size() - 1;
287	setCommandLineText(cmdHistory.get(cmdHistoryIdx));
288	return;
289	}
290
291	if(cmdHistoryIdx == 0) return;
292
293	setCommandLineText(cmdHistory.get(--cmdHistoryIdx));
294	}
295
296	/** Browses the command history one line down. */
297	@Override
298	public void
299	browseCommandHistoryDown() {
300	if(cmdHistory.size() == 0 \|\| cmdHistoryIdx == -1) return;
301	if(cmdHistoryIdx == cmdHistory.size() - 1) {
302	cmdHistoryIdx = -1;
303	setCommandLineText(currentCmd);
304	currentCmd = "";
305	return;
306	}
307
308	setCommandLineText(cmdHistory.get(++cmdHistoryIdx));
309	}
310
311	/** Browses to the first line of the command history. */
312	@Override
313	public void
314	browseCommandHistoryFirst() {
315	if(cmdHistory.size() == 0) return;
316	cmdHistoryIdx = 0;
317	setCommandLineText(cmdHistory.get(cmdHistoryIdx));
318	}
319
320	/** Browses to the last line of the command history. */
321	@Override
322	public void
323	browseCommandHistoryLast() {
324	if(cmdHistory.size() == 0) return;
325	cmdHistoryIdx = cmdHistory.size() - 1;
326	setCommandLineText(cmdHistory.get(cmdHistoryIdx));
327	}
328
329	private Vector<String> tmpVector = new Vector<String>();
330
331	/**
332	* Searches the command history for commands
333	* containing the string returned by {@link #getCommandLineText}.
334	* @return All commands that contains the string returned by {@link #getCommandLineText}.
335	* @see #getCommandHistory
336	*/
337	@Override
338	public String[]
339	searchCommandHistory() { return searchCommandHistory(getCommandLineText()); }
340
341	/**
342	* Searches the command history for commands containing <code>substring</code>.
343	* @param substring The substring to be used to perform the search.
344	* @return All commands that contains <code>substring</code>.
345	* @see #getCommandList
346	*/
347	@Override
348	public String[]
349	searchCommandHistory(String substring) {
350	tmpVector.removeAllElements();
351	for(String s : cmdHistory) if(s.indexOf(substring) != -1) tmpVector.add(s);
352
353	return tmpVector.toArray(new String[tmpVector.size()]);
354	}
355
356	/**
357	* Searches the LSCP command list for commands
358	* containing the string returned by {@link #getCommandLineText}.
359	* @return All commands that contains the string returned by {@link #getCommandLineText}.
360	* @see #getCommandList
361	*/
362	@Override
363	public String[]
364	searchCommandList() { return searchCommandList(getCommandLineText()); }
365
366	/**
367	* Searches the LSCP command list for commands containing <code>substring</code>.
368	* @param substring The substring to be used to perform the search.
369	* @return All commands that contains <code>substring</code>.
370	* @see #getCommandList
371	*/
372	@Override
373	public String[]
374	searchCommandList(String substring) {
375	tmpVector.removeAllElements();
376	for(String s : cmdList) if(s.indexOf(substring) != -1) tmpVector.add(s);
377
378	return tmpVector.toArray(new String[tmpVector.size()]);
379	}
380
381	public void
382	quit() { disconnect(); }
383
384	/** Notifies listeners that the text in the command line has changed. */
385	private void
386	fireCommandLineTextChanged(String oldCmdLine) {
387	LSConsoleEvent e = new LSConsoleEvent(this, null, oldCmdLine);
388	for(LSConsoleListener l : listeners) l.commandLineTextChanged(e);
389	}
390
391	/** Notifies listeners that the command in the command line has been executed. */
392	private void
393	fireCommandExecuted() {
394	LSConsoleEvent e = new LSConsoleEvent(this);
395	for(LSConsoleListener l : listeners) l.commandExecuted(e);
396	}
397
398	/**
399	* Notifies listeners that response is received from LinuxSampler.
400	* @param response The response received from LinuxSampler.
401	*/
402	private void
403	fireResponseReceived(final String response) {
404	PDUtils.runOnUiThread(new Runnable() {
405	public void
406	run() {
407	LSConsoleEvent e = new LSConsoleEvent(this, response);
408	for(LSConsoleListener l : listeners) l.responseReceived(e);
409	}
410	});
411	}
412
413	/** Executes LS Console command. */
414	private class LSConsoleExecCommand extends org.jsampler.task.EnhancedTask {
415	private String cmd;
416
417	/** Creates a new instance of <code>LSConsoleExecCommand</code>. */
418	public
419	LSConsoleExecCommand(String cmd) {
420	setTitle("LSConsoleExecCommand_task");
421	setDescription(i18n.getMessage("LSConsoleExecCommand.description"));
422	this.cmd = cmd;
423	}
424
425	/** The entry point of the task. */
426	public void
427	exec() throws Exception { out.writeLine(cmd); }
428	}
429
430	class LSConsoleThread extends Thread {
431	LscpInputStream in;
432	private boolean terminate = false;
433
434	LSConsoleThread() {super("LS-Console-Thread"); }
435
436	@Override
437	public void
438	run() {
439	while(!mustTerminate()) {
440	try { processInput(); }
441	catch(Exception x) {
442	CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
443	}
444
445	try { synchronized(this) { wait(100); } }
446	catch(Exception x) {
447	CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
448	}
449	}
450	}
451
452	private synchronized boolean
453	mustTerminate() { return terminate; }
454
455	public synchronized void
456	terminate() {
457	terminate = true;
458	this.notifyAll();
459	}
460
461	/** Processes the input sent by LinuxSampler */
462	private synchronized void
463	processInput() throws IOException {
464	while(in != null && in.available() > 0) {
465	String response = in.readLine();
466	fireResponseReceived(response);
467	}
468	}
469
470	public synchronized void
471	setInputStream(LscpInputStream in) { this.in = in; }
472	}
473
474	class LscpInputStream {
475	private InputStream in;
476	private StringBuffer buf = new StringBuffer();
477
478	/**
479	* Creates a new instance of LscpInputStream.
480	*
481	*/
482	public
483	LscpInputStream(InputStream in) {
484	this.in = in;
485	}
486
487	/**
488	* Reads a line.
489	* This method is thread safe.
490	*
491	* @return A string containing the next line readed from the stream or
492	* <code>null</code> if the end of the stream has been reached.
493	* @throws IOException If an I/O error occurs.
494	*/
495	public synchronized String
496	readLine() throws IOException {
497	int i;
498	buf.setLength(0);
499
500	while((i = in.read()) != -1) {
501	if(i == '\r') {
502	checkLF();
503	break;
504	}
505	buf.append((char)i);
506	}
507
508	if(i == -1) {
509	if(buf.length() > 0)
510	throw new IOException("Unexpected end of line!");
511	return null;
512	}
513	return buf.toString();
514	}
515
516	/**
517	* Returns the number of bytes that can
518	* be read from this input stream without blocking.
519	*
520	* @return The number of bytes that can
521	* be read from this input stream without blocking.
522	* @throws IOException If an I/O error occurs.
523	*/
524	public synchronized int
525	available() throws IOException { return in.available(); }
526
527	private void
528	checkLF() throws IOException {
529	int i = in.read();
530	if(i == -1) throw new IOException("Unexpected end of file!");
531	if(i != '\n') throw new IOException("Unexpected end of line!");
532	}
533	}
534
535	class LscpOutputStream {
536	private OutputStream out;
537
538	/** Creates a new instance of LscpOutputStream */
539	public
540	LscpOutputStream(OutputStream out) { this.out = out; }
541
542	/*
543	* Writes a line.
544	* @param line a string to be written.
545	*/
546	public void
547	writeLine(String line) throws IOException {
548	try {
549	out.write(line.getBytes("US-ASCII"));
550	out.write('\r');
551	out.write('\n');
552	out.flush();
553	} catch(UnsupportedEncodingException x) {
554	CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
555	}
556	}
557	}
558	}