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.awt.event.ActionEvent;
import java.awt.event.ActionListener;

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 javax.swing.SwingUtilities;

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 ActionListener() {
                        public void
                        actionPerformed(ActionEvent 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()]);
        }
        
        /** 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) {
                SwingUtilities.invokeLater(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	iliev	913	/*
2			* JSampler - a java front-end for LinuxSampler
3			*
4	iliev	1786	* Copyright (C) 2005-2008 Grigor Iliev <grigor@grigoriliev.com>
5	iliev	913	*
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.awt.event.ActionEvent;
26			import java.awt.event.ActionListener;
27
28			import java.io.InputStream;
29			import java.io.IOException;
30			import java.io.OutputStream;
31			import java.io.UnsupportedEncodingException;
32
33			import java.net.Socket;
34
35			import java.util.LinkedList;
36			import java.util.Vector;
37
38			import java.util.logging.Level;
39
40			import javax.swing.SwingUtilities;
41
42			import net.sf.juife.event.TaskEvent;
43			import net.sf.juife.event.TaskListener;
44
45			import org.jsampler.event.LSConsoleEvent;
46			import org.jsampler.event.LSConsoleListener;
47
48			import org.jsampler.task.LSConsoleConnect;
49
50			import static org.jsampler.JSI18n.i18n;
51
52
53			/**
54			* This class provides default implementation of the <code>LSConsoleModel</code> interface.
55			* @author Grigor Iliev
56			*/
57			public class DefaultLSConsoleModel implements LSConsoleModel {
58			private Socket socket;
59			private LscpOutputStream out;
60
61			private final String[] cmdList = LscpUtils.getCommandList();
62
63			private String cmdLine = "";
64
65			/**
66			* Contains the global command history, excluding blank lines and comments.
67			*/
68			private final LinkedList<String> cmdHistory = new LinkedList<String>();
69
70			private int cmdHistoryIdx = -1;
71
72			private int commandHistorySize = 1000;
73
74			private final LSConsoleThread lsConsoleThread = new LSConsoleThread();
75
76			/**
77			* Contains the command history of the current
78			* session, including blank lines and comments.
79			*/
80			private final Vector<String> sessionHistory = new Vector<String>();
81
82			/** Used to hold the current command when browsing through command history, etc. */
83			private String currentCmd = "";
84
85			private final Vector<LSConsoleListener> listeners = new Vector<LSConsoleListener>();
86
87
88			/** Creates a new instance of <code>DefaultLSConsoleModel</code>. */
89			public
90			DefaultLSConsoleModel() {
91			CC.addReconnectListener(new ActionListener() {
92			public void
93			actionPerformed(ActionEvent e) { reconnect(); }
94			});
95
96			lsConsoleThread.start();
97			}
98
99			private Socket
100			getSocket() { return socket; }
101
102			private void
103			setSocket(Socket socket) { this.socket = socket; }
104
105			private void
106			reconnect() {
107			final LSConsoleConnect cnt = new LSConsoleConnect(getSocket());
108
109			cnt.addTaskListener(new TaskListener() {
110			public void
111			taskPerformed(TaskEvent e) { changeSocket(cnt.getResult()); }
112			});
113
114			CC.getTaskQueue().add(cnt);
115			}
116
117	iliev	1786	public void
118			disconnect() {
119			try { if(getSocket() != null) getSocket().close(); }
120			catch(Exception x) { CC.getLogger().info(HF.getErrorMessage(x)); }
121			}
122
123	iliev	913	private void
124			changeSocket(Socket sock) {
125			setSocket(sock);
126
127			try {
128			LscpInputStream in;
129			in = sock == null ? null : new LscpInputStream(sock.getInputStream());
130			out = sock == null ? null : new LscpOutputStream(sock.getOutputStream());
131
132			lsConsoleThread.setInputStream(in);
133			} catch(Exception x) { CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x); }
134			}
135
136			/**
137			* Registers the specified listener for receiving event messages.
138			* @param l The <code>LSConsoleListener</code> to register.
139			*/
140	iliev	1786	@Override
141	iliev	913	public void
142			addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
143
144			/**
145			* Removes the specified listener.
146			* @param l The <code>LSConsoleListener</code> to remove.
147			*/
148	iliev	1786	@Override
149	iliev	913	public void
150			removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
151
152			/** Executes the command specified in the command line. */
153	iliev	1786	@Override
154	iliev	913	public void
155			execCommand() {
156			String cmd = getCommandLineText();
157			sessionHistory.add(cmd);
158			if(cmd.trim().length() > 0 && !cmd.startsWith("#")) addToCommandHistory(cmd);
159			while(cmdHistory.size() > getCommandHistorySize()) cmdHistory.removeFirst();
160
161			setCommandLineText("");
162			currentCmd = "";
163			cmdHistoryIdx = -1;
164
165			if( getSocket() == null \|\| getSocket().isClosed() \|\| !getSocket().isConnected()
166			\|\| getSocket().isOutputShutdown() \|\| out == null ) {
167
168			fireResponseReceived(i18n.getMessage("DefaultLSConsoleModel.notConnected"));
169			} else {
170			CC.getTaskQueue().add(new LSConsoleExecCommand(cmd));
171			}
172
173			fireCommandExecuted();
174			}
175
176			/**
177			* Gets the last executed command.
178			* @return The last command executed in the LS Console.
179			*/
180	iliev	1786	@Override
181	iliev	913	public String
182			getLastExecutedCommand() {
183			int size = sessionHistory.size();
184			return size == 0 ? "" : sessionHistory.get(size - 1);
185			}
186
187			/**
188			* Sets the text in the command line.
189			* @param cmdLine The new command line text.
190			*/
191	iliev	1786	@Override
192	iliev	913	public void
193			setCommandLineText(String cmdLine) {
194			if(this.cmdLine.equals(cmdLine)) return;
195
196			String oldCmdLine = this.cmdLine;
197			this.cmdLine = cmdLine;
198			fireCommandLineTextChanged(oldCmdLine);
199			}
200
201			/**
202			* Gets the text in the command line.
203			* @return The command line's text.
204			*/
205	iliev	1786	@Override
206	iliev	913	public String
207			getCommandLineText() { return cmdLine; }
208
209			/**
210			* Gets the command history of the current session, including blank lines and comments.
211			* @return The command history of the current session, including blank lines and comments.
212			*/
213	iliev	1786	@Override
214	iliev	913	public String[]
215			getSessionHistory() {
216			return sessionHistory.toArray(new String[sessionHistory.size()]);
217			}
218
219			/**
220			* Clears the session history.
221			* @see #getSessionHistory
222			*/
223	iliev	1786	@Override
224	iliev	913	public void
225			clearSessionHistory() { sessionHistory.removeAllElements(); }
226
227			/**
228			* Adds the specified <code>command</code> to command history.
229			* @param command The command to be added to command history.
230			*/
231	iliev	1786	@Override
232	iliev	913	public void
233			addToCommandHistory(String command) { cmdHistory.add(command); }
234
235			/**
236			* Gets the complete command history, excluding blank lines and comments.
237			* @return The complete command history, excluding blank lines and comments.
238			*/
239	iliev	1786	@Override
240	iliev	913	public String[]
241			getCommandHistory() {
242			return cmdHistory.toArray(new String[cmdHistory.size()]);
243			}
244
245			/**
246			* Clears the complete/multisession command history.
247			* @see #getCommandHistory
248			*/
249	iliev	1786	@Override
250	iliev	913	public void
251			clearCommandHistory() {
252			cmdHistory.clear();
253			cmdHistoryIdx = -1;
254			}
255
256			/**
257			* Determines the maximum number of lines to be kept in the command history.
258			* @return The maximum number of lines to be kept in the command history.
259			*/
260	iliev	1786	@Override
261	iliev	913	public int
262			getCommandHistorySize() { return commandHistorySize; }
263
264			/**
265			* Sets the maximum number of lines to be kept in the command history.
266			* @param size Determines the maximum number of lines to be kept in the command history.
267			*/
268	iliev	1786	@Override
269	iliev	913	public void
270			setCommandHistorySize(int size) { commandHistorySize = size; }
271
272			/**
273			* Gets a list of all LSCP commands.
274			* @return A list of all LSCP commands.
275			*/
276	iliev	1786	@Override
277	iliev	913	public String[]
278			getCommandList() { return cmdList; }
279
280			/** Browses the command history one line up. */
281	iliev	1786	@Override
282	iliev	913	public void
283			browseCommandHistoryUp() {
284			if(cmdHistory.size() == 0) return;
285
286			if(cmdHistoryIdx == -1) {
287			currentCmd = getCommandLineText();
288			cmdHistoryIdx = cmdHistory.size() - 1;
289			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
290			return;
291			}
292
293			if(cmdHistoryIdx == 0) return;
294
295			setCommandLineText(cmdHistory.get(--cmdHistoryIdx));
296			}
297
298			/** Browses the command history one line down. */
299	iliev	1786	@Override
300	iliev	913	public void
301			browseCommandHistoryDown() {
302			if(cmdHistory.size() == 0 \|\| cmdHistoryIdx == -1) return;
303			if(cmdHistoryIdx == cmdHistory.size() - 1) {
304			cmdHistoryIdx = -1;
305			setCommandLineText(currentCmd);
306			currentCmd = "";
307			return;
308			}
309
310			setCommandLineText(cmdHistory.get(++cmdHistoryIdx));
311			}
312
313			/** Browses to the first line of the command history. */
314	iliev	1786	@Override
315	iliev	913	public void
316			browseCommandHistoryFirst() {
317			if(cmdHistory.size() == 0) return;
318			cmdHistoryIdx = 0;
319			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
320			}
321
322			/** Browses to the last line of the command history. */
323	iliev	1786	@Override
324	iliev	913	public void
325			browseCommandHistoryLast() {
326			if(cmdHistory.size() == 0) return;
327			cmdHistoryIdx = cmdHistory.size() - 1;
328			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
329			}
330
331			private Vector<String> tmpVector = new Vector<String>();
332
333			/**
334			* Searches the command history for commands
335			* containing the string returned by {@link #getCommandLineText}.
336			* @return All commands that contains the string returned by {@link #getCommandLineText}.
337			* @see #getCommandHistory
338			*/
339	iliev	1786	@Override
340	iliev	913	public String[]
341			searchCommandHistory() { return searchCommandHistory(getCommandLineText()); }
342
343			/**
344			* Searches the command history for commands containing <code>substring</code>.
345			* @param substring The substring to be used to perform the search.
346			* @return All commands that contains <code>substring</code>.
347			* @see #getCommandList
348			*/
349	iliev	1786	@Override
350	iliev	913	public String[]
351			searchCommandHistory(String substring) {
352			tmpVector.removeAllElements();
353			for(String s : cmdHistory) if(s.indexOf(substring) != -1) tmpVector.add(s);
354
355			return tmpVector.toArray(new String[tmpVector.size()]);
356			}
357
358			/**
359			* Searches the LSCP command list for commands
360			* containing the string returned by {@link #getCommandLineText}.
361			* @return All commands that contains the string returned by {@link #getCommandLineText}.
362			* @see #getCommandList
363			*/
364	iliev	1786	@Override
365	iliev	913	public String[]
366			searchCommandList() { return searchCommandList(getCommandLineText()); }
367
368			/**
369			* Searches the LSCP command list for commands containing <code>substring</code>.
370			* @param substring The substring to be used to perform the search.
371			* @return All commands that contains <code>substring</code>.
372			* @see #getCommandList
373			*/
374	iliev	1786	@Override
375	iliev	913	public String[]
376			searchCommandList(String substring) {
377			tmpVector.removeAllElements();
378			for(String s : cmdList) if(s.indexOf(substring) != -1) tmpVector.add(s);
379
380			return tmpVector.toArray(new String[tmpVector.size()]);
381			}
382
383			/** Notifies listeners that the text in the command line has changed. */
384			private void
385			fireCommandLineTextChanged(String oldCmdLine) {
386			LSConsoleEvent e = new LSConsoleEvent(this, null, oldCmdLine);
387			for(LSConsoleListener l : listeners) l.commandLineTextChanged(e);
388			}
389
390			/** Notifies listeners that the command in the command line has been executed. */
391			private void
392			fireCommandExecuted() {
393			LSConsoleEvent e = new LSConsoleEvent(this);
394			for(LSConsoleListener l : listeners) l.commandExecuted(e);
395			}
396
397			/**
398			* Notifies listeners that response is received from LinuxSampler.
399			* @param response The response received from LinuxSampler.
400			*/
401			private void
402			fireResponseReceived(final String response) {
403			SwingUtilities.invokeLater(new Runnable() {
404			public void
405			run() {
406			LSConsoleEvent e = new LSConsoleEvent(this, response);
407			for(LSConsoleListener l : listeners) l.responseReceived(e);
408			}
409			});
410			}
411
412			/** Executes LS Console command. */
413			private class LSConsoleExecCommand extends org.jsampler.task.EnhancedTask {
414			private String cmd;
415
416			/** Creates a new instance of <code>LSConsoleExecCommand</code>. */
417			public
418			LSConsoleExecCommand(String cmd) {
419			setTitle("LSConsoleExecCommand_task");
420			setDescription(i18n.getMessage("LSConsoleExecCommand.description"));
421			this.cmd = cmd;
422			}
423
424			/** The entry point of the task. */
425			public void
426	iliev	1867	exec() throws Exception { out.writeLine(cmd); }
427	iliev	913	}
428
429			class LSConsoleThread extends Thread {
430			LscpInputStream in;
431			private boolean terminate = false;
432
433			LSConsoleThread() {super("LS-Console-Thread"); }
434
435	iliev	1786	@Override
436	iliev	913	public void
437			run() {
438			while(!mustTerminate()) {
439			try { processInput(); }
440			catch(Exception x) {
441			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
442			}
443
444			try { synchronized(this) { wait(100); } }
445			catch(Exception x) {
446			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
447			}
448			}
449			}
450
451			private synchronized boolean
452			mustTerminate() { return terminate; }
453
454			public synchronized void
455			terminate() {
456			terminate = true;
457			this.notifyAll();
458			}
459
460			/** Processes the input sent by LinuxSampler */
461			private synchronized void
462			processInput() throws IOException {
463			while(in != null && in.available() > 0) {
464			String response = in.readLine();
465			fireResponseReceived(response);
466			}
467			}
468
469			public synchronized void
470			setInputStream(LscpInputStream in) { this.in = in; }
471			}
472
473			class LscpInputStream {
474			private InputStream in;
475			private StringBuffer buf = new StringBuffer();
476
477			/**
478			* Creates a new instance of LscpInputStream.
479			*
480			*/
481			public
482			LscpInputStream(InputStream in) {
483			this.in = in;
484			}
485
486			/**
487			* Reads a line.
488			* This method is thread safe.
489			*
490			* @return A string containing the next line readed from the stream or
491			* <code>null</code> if the end of the stream has been reached.
492			* @throws IOException If an I/O error occurs.
493			*/
494			public synchronized String
495			readLine() throws IOException {
496			int i;
497			buf.setLength(0);
498
499			while((i = in.read()) != -1) {
500			if(i == '\r') {
501			checkLF();
502			break;
503			}
504			buf.append((char)i);
505			}
506
507			if(i == -1) {
508			if(buf.length() > 0)
509			throw new IOException("Unexpected end of line!");
510			return null;
511			}
512			return buf.toString();
513			}
514
515			/**
516			* Returns the number of bytes that can
517			* be read from this input stream without blocking.
518			*
519			* @return The number of bytes that can
520			* be read from this input stream without blocking.
521			* @throws IOException If an I/O error occurs.
522			*/
523			public synchronized int
524			available() throws IOException { return in.available(); }
525
526			private void
527			checkLF() throws IOException {
528			int i = in.read();
529			if(i == -1) throw new IOException("Unexpected end of file!");
530			if(i != '\n') throw new IOException("Unexpected end of line!");
531			}
532			}
533
534			class LscpOutputStream {
535			private OutputStream out;
536
537			/** Creates a new instance of LscpOutputStream */
538			public
539			LscpOutputStream(OutputStream out) { this.out = out; }
540
541			/*
542			* Writes a line.
543			* @param line a string to be written.
544			*/
545			public void
546			writeLine(String line) throws IOException {
547			try {
548			out.write(line.getBytes("US-ASCII"));
549			out.write('\r');
550			out.write('\n');
551			out.flush();
552			} catch(UnsupportedEncodingException x) {
553			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
554			}
555			}
556			}
557			}