org/jsampler/DefaultLSConsoleModel.java

/*
 *   JSampler - a java front-end for LinuxSampler
 *
 *   Copyright (C) 2005-2006 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);
        }
        
        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.
         */
        public void
        addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
        
        /**
         * Removes the specified listener.
         * @param l The <code>LSConsoleListener</code> to remove.
         */
        public void
        removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
        
        /** Executes the command specified in the command line. */
        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.
         */
        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.
         */
        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.
         */
        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.
         */
        public String[]
        getSessionHistory() {
                return sessionHistory.toArray(new String[sessionHistory.size()]);
        }
        
        /**
         * Clears the session history.
         * @see #getSessionHistory
         */
        public void
        clearSessionHistory() { sessionHistory.removeAllElements(); }
        
        /**
         * Adds the specified <code>command</code> to command history.
         * @param command The command to be added to command history.
         */
        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.
         */
        public String[]
        getCommandHistory() {
                return cmdHistory.toArray(new String[cmdHistory.size()]);
        }
        
        /**
         * Clears the complete/multisession command history.
         * @see #getCommandHistory
         */
        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.
         */
        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.
         */
        public void
        setCommandHistorySize(int size) { commandHistorySize = size; }
        
        /**
         * Gets a list of all LSCP commands.
         * @return A list of all LSCP commands.
         */
        public String[]
        getCommandList() { return cmdList; }
        
        /** Browses the command history one line up. */
        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. */
        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. */
        public void
        browseCommandHistoryFirst() {
                if(cmdHistory.size() == 0) return;
                cmdHistoryIdx = 0;
                setCommandLineText(cmdHistory.get(cmdHistoryIdx));
        }
        
        /** Browses to the last line of the command history. */
        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
         */
        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
         */
        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
         */
        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
         */
        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
                run() {
                        try { out.writeLine(cmd); }
                        catch(Exception x) {
                                setErrorMessage(getDescription() + ": " + HF.getErrorMessage(x));
                                CC.getLogger().log(Level.FINE, getErrorMessage(), x);
                        }
                }
        }

        class LSConsoleThread extends Thread {
                LscpInputStream in;
                private boolean terminate = false;
                
                LSConsoleThread() {super("LS-Console-Thread"); }
                
                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	1143	* Copyright (C) 2005-2006 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			private void
118			changeSocket(Socket sock) {
119			setSocket(sock);
120
121			try {
122			LscpInputStream in;
123			in = sock == null ? null : new LscpInputStream(sock.getInputStream());
124			out = sock == null ? null : new LscpOutputStream(sock.getOutputStream());
125
126			lsConsoleThread.setInputStream(in);
127			} catch(Exception x) { CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x); }
128			}
129
130			/**
131			* Registers the specified listener for receiving event messages.
132			* @param l The <code>LSConsoleListener</code> to register.
133			*/
134			public void
135			addLSConsoleListener(LSConsoleListener l) { listeners.add(l); }
136
137			/**
138			* Removes the specified listener.
139			* @param l The <code>LSConsoleListener</code> to remove.
140			*/
141			public void
142			removeLSConsoleListener(LSConsoleListener l) { listeners.remove(l); }
143
144			/** Executes the command specified in the command line. */
145			public void
146			execCommand() {
147			String cmd = getCommandLineText();
148			sessionHistory.add(cmd);
149			if(cmd.trim().length() > 0 && !cmd.startsWith("#")) addToCommandHistory(cmd);
150			while(cmdHistory.size() > getCommandHistorySize()) cmdHistory.removeFirst();
151
152			setCommandLineText("");
153			currentCmd = "";
154			cmdHistoryIdx = -1;
155
156			if( getSocket() == null \|\| getSocket().isClosed() \|\| !getSocket().isConnected()
157			\|\| getSocket().isOutputShutdown() \|\| out == null ) {
158
159			fireResponseReceived(i18n.getMessage("DefaultLSConsoleModel.notConnected"));
160			} else {
161			CC.getTaskQueue().add(new LSConsoleExecCommand(cmd));
162			}
163
164			fireCommandExecuted();
165			}
166
167			/**
168			* Gets the last executed command.
169			* @return The last command executed in the LS Console.
170			*/
171			public String
172			getLastExecutedCommand() {
173			int size = sessionHistory.size();
174			return size == 0 ? "" : sessionHistory.get(size - 1);
175			}
176
177			/**
178			* Sets the text in the command line.
179			* @param cmdLine The new command line text.
180			*/
181			public void
182			setCommandLineText(String cmdLine) {
183			if(this.cmdLine.equals(cmdLine)) return;
184
185			String oldCmdLine = this.cmdLine;
186			this.cmdLine = cmdLine;
187			fireCommandLineTextChanged(oldCmdLine);
188			}
189
190			/**
191			* Gets the text in the command line.
192			* @return The command line's text.
193			*/
194			public String
195			getCommandLineText() { return cmdLine; }
196
197			/**
198			* Gets the command history of the current session, including blank lines and comments.
199			* @return The command history of the current session, including blank lines and comments.
200			*/
201			public String[]
202			getSessionHistory() {
203			return sessionHistory.toArray(new String[sessionHistory.size()]);
204			}
205
206			/**
207			* Clears the session history.
208			* @see #getSessionHistory
209			*/
210			public void
211			clearSessionHistory() { sessionHistory.removeAllElements(); }
212
213			/**
214			* Adds the specified <code>command</code> to command history.
215			* @param command The command to be added to command history.
216			*/
217			public void
218			addToCommandHistory(String command) { cmdHistory.add(command); }
219
220			/**
221			* Gets the complete command history, excluding blank lines and comments.
222			* @return The complete command history, excluding blank lines and comments.
223			*/
224			public String[]
225			getCommandHistory() {
226			return cmdHistory.toArray(new String[cmdHistory.size()]);
227			}
228
229			/**
230			* Clears the complete/multisession command history.
231			* @see #getCommandHistory
232			*/
233			public void
234			clearCommandHistory() {
235			cmdHistory.clear();
236			cmdHistoryIdx = -1;
237			}
238
239			/**
240			* Determines the maximum number of lines to be kept in the command history.
241			* @return The maximum number of lines to be kept in the command history.
242			*/
243			public int
244			getCommandHistorySize() { return commandHistorySize; }
245
246			/**
247			* Sets the maximum number of lines to be kept in the command history.
248			* @param size Determines the maximum number of lines to be kept in the command history.
249			*/
250			public void
251			setCommandHistorySize(int size) { commandHistorySize = size; }
252
253			/**
254			* Gets a list of all LSCP commands.
255			* @return A list of all LSCP commands.
256			*/
257			public String[]
258			getCommandList() { return cmdList; }
259
260			/** Browses the command history one line up. */
261			public void
262			browseCommandHistoryUp() {
263			if(cmdHistory.size() == 0) return;
264
265			if(cmdHistoryIdx == -1) {
266			currentCmd = getCommandLineText();
267			cmdHistoryIdx = cmdHistory.size() - 1;
268			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
269			return;
270			}
271
272			if(cmdHistoryIdx == 0) return;
273
274			setCommandLineText(cmdHistory.get(--cmdHistoryIdx));
275			}
276
277			/** Browses the command history one line down. */
278			public void
279			browseCommandHistoryDown() {
280			if(cmdHistory.size() == 0 \|\| cmdHistoryIdx == -1) return;
281			if(cmdHistoryIdx == cmdHistory.size() - 1) {
282			cmdHistoryIdx = -1;
283			setCommandLineText(currentCmd);
284			currentCmd = "";
285			return;
286			}
287
288			setCommandLineText(cmdHistory.get(++cmdHistoryIdx));
289			}
290
291			/** Browses to the first line of the command history. */
292			public void
293			browseCommandHistoryFirst() {
294			if(cmdHistory.size() == 0) return;
295			cmdHistoryIdx = 0;
296			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
297			}
298
299			/** Browses to the last line of the command history. */
300			public void
301			browseCommandHistoryLast() {
302			if(cmdHistory.size() == 0) return;
303			cmdHistoryIdx = cmdHistory.size() - 1;
304			setCommandLineText(cmdHistory.get(cmdHistoryIdx));
305			}
306
307			private Vector<String> tmpVector = new Vector<String>();
308
309			/**
310			* Searches the command history for commands
311			* containing the string returned by {@link #getCommandLineText}.
312			* @return All commands that contains the string returned by {@link #getCommandLineText}.
313			* @see #getCommandHistory
314			*/
315			public String[]
316			searchCommandHistory() { return searchCommandHistory(getCommandLineText()); }
317
318			/**
319			* Searches the command history for commands containing <code>substring</code>.
320			* @param substring The substring to be used to perform the search.
321			* @return All commands that contains <code>substring</code>.
322			* @see #getCommandList
323			*/
324			public String[]
325			searchCommandHistory(String substring) {
326			tmpVector.removeAllElements();
327			for(String s : cmdHistory) if(s.indexOf(substring) != -1) tmpVector.add(s);
328
329			return tmpVector.toArray(new String[tmpVector.size()]);
330			}
331
332			/**
333			* Searches the LSCP command list for commands
334			* containing the string returned by {@link #getCommandLineText}.
335			* @return All commands that contains the string returned by {@link #getCommandLineText}.
336			* @see #getCommandList
337			*/
338			public String[]
339			searchCommandList() { return searchCommandList(getCommandLineText()); }
340
341			/**
342			* Searches the LSCP command list 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			public String[]
348			searchCommandList(String substring) {
349			tmpVector.removeAllElements();
350			for(String s : cmdList) if(s.indexOf(substring) != -1) tmpVector.add(s);
351
352			return tmpVector.toArray(new String[tmpVector.size()]);
353			}
354
355			/** Notifies listeners that the text in the command line has changed. */
356			private void
357			fireCommandLineTextChanged(String oldCmdLine) {
358			LSConsoleEvent e = new LSConsoleEvent(this, null, oldCmdLine);
359			for(LSConsoleListener l : listeners) l.commandLineTextChanged(e);
360			}
361
362			/** Notifies listeners that the command in the command line has been executed. */
363			private void
364			fireCommandExecuted() {
365			LSConsoleEvent e = new LSConsoleEvent(this);
366			for(LSConsoleListener l : listeners) l.commandExecuted(e);
367			}
368
369			/**
370			* Notifies listeners that response is received from LinuxSampler.
371			* @param response The response received from LinuxSampler.
372			*/
373			private void
374			fireResponseReceived(final String response) {
375			SwingUtilities.invokeLater(new Runnable() {
376			public void
377			run() {
378			LSConsoleEvent e = new LSConsoleEvent(this, response);
379			for(LSConsoleListener l : listeners) l.responseReceived(e);
380			}
381			});
382			}
383
384			/** Executes LS Console command. */
385			private class LSConsoleExecCommand extends org.jsampler.task.EnhancedTask {
386			private String cmd;
387
388			/** Creates a new instance of <code>LSConsoleExecCommand</code>. */
389			public
390			LSConsoleExecCommand(String cmd) {
391			setTitle("LSConsoleExecCommand_task");
392			setDescription(i18n.getMessage("LSConsoleExecCommand.description"));
393			this.cmd = cmd;
394			}
395
396			/** The entry point of the task. */
397			public void
398			run() {
399			try { out.writeLine(cmd); }
400			catch(Exception x) {
401			setErrorMessage(getDescription() + ": " + HF.getErrorMessage(x));
402			CC.getLogger().log(Level.FINE, getErrorMessage(), x);
403			}
404			}
405			}
406
407			class LSConsoleThread extends Thread {
408			LscpInputStream in;
409			private boolean terminate = false;
410
411			LSConsoleThread() {super("LS-Console-Thread"); }
412
413			public void
414			run() {
415			while(!mustTerminate()) {
416			try { processInput(); }
417			catch(Exception x) {
418			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
419			}
420
421			try { synchronized(this) { wait(100); } }
422			catch(Exception x) {
423			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
424			}
425			}
426			}
427
428			private synchronized boolean
429			mustTerminate() { return terminate; }
430
431			public synchronized void
432			terminate() {
433			terminate = true;
434			this.notifyAll();
435			}
436
437			/** Processes the input sent by LinuxSampler */
438			private synchronized void
439			processInput() throws IOException {
440			while(in != null && in.available() > 0) {
441			String response = in.readLine();
442			fireResponseReceived(response);
443			}
444			}
445
446			public synchronized void
447			setInputStream(LscpInputStream in) { this.in = in; }
448			}
449
450			class LscpInputStream {
451			private InputStream in;
452			private StringBuffer buf = new StringBuffer();
453
454			/**
455			* Creates a new instance of LscpInputStream.
456			*
457			*/
458			public
459			LscpInputStream(InputStream in) {
460			this.in = in;
461			}
462
463			/**
464			* Reads a line.
465			* This method is thread safe.
466			*
467			* @return A string containing the next line readed from the stream or
468			* <code>null</code> if the end of the stream has been reached.
469			* @throws IOException If an I/O error occurs.
470			*/
471			public synchronized String
472			readLine() throws IOException {
473			int i;
474			buf.setLength(0);
475
476			while((i = in.read()) != -1) {
477			if(i == '\r') {
478			checkLF();
479			break;
480			}
481			buf.append((char)i);
482			}
483
484			if(i == -1) {
485			if(buf.length() > 0)
486			throw new IOException("Unexpected end of line!");
487			return null;
488			}
489			return buf.toString();
490			}
491
492			/**
493			* Returns the number of bytes that can
494			* be read from this input stream without blocking.
495			*
496			* @return The number of bytes that can
497			* be read from this input stream without blocking.
498			* @throws IOException If an I/O error occurs.
499			*/
500			public synchronized int
501			available() throws IOException { return in.available(); }
502
503			private void
504			checkLF() throws IOException {
505			int i = in.read();
506			if(i == -1) throw new IOException("Unexpected end of file!");
507			if(i != '\n') throw new IOException("Unexpected end of line!");
508			}
509			}
510
511			class LscpOutputStream {
512			private OutputStream out;
513
514			/** Creates a new instance of LscpOutputStream */
515			public
516			LscpOutputStream(OutputStream out) { this.out = out; }
517
518			/*
519			* Writes a line.
520			* @param line a string to be written.
521			*/
522			public void
523			writeLine(String line) throws IOException {
524			try {
525			out.write(line.getBytes("US-ASCII"));
526			out.write('\r');
527			out.write('\n');
528			out.flush();
529			} catch(UnsupportedEncodingException x) {
530			CC.getLogger().log(Level.INFO, HF.getErrorMessage(x), x);
531			}
532			}
533			}
534			}