Chamilo is a learning management system focused on ease of use and accessibility
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chamilo-lms/main/app_share/RecordingFrame.java

322 lines
8.4 KiB

//
// Copyright (C) 2002 Constantin Kaplinsky. All Rights Reserved.
//
// This is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This software 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 this software; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
//
// Recording frame. It allows to control recording RFB sessions into
// FBS (FrameBuffer Stream) files.
//
import java.awt.Button;
import java.awt.Color;
import java.awt.FileDialog;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.io.File;
class RecordingFrame extends Frame
implements WindowListener, ActionListener {
boolean recording;
TextField fnameField;
Button browseButton;
Label statusLabel;
Button recordButton, nextButton, closeButton;
VncViewer viewer;
//
// Check if current security manager allows to create a
// RecordingFrame object.
//
public static boolean checkSecurity() {
SecurityManager security = System.getSecurityManager();
if (security != null) {
try {
security.checkPropertyAccess("user.dir");
security.checkPropertyAccess("file.separator");
} catch (SecurityException e) {
System.out.println("SecurityManager restricts session recording.");
return false;
}
}
return true;
}
//
// Constructor.
//
RecordingFrame(VncViewer v) {
super("TightVNC Session Recording");
viewer = v;
// Determine initial filename for next saved session.
// FIXME: Check SecurityManager.
String fname = nextNewFilename(System.getProperty("user.dir") +
System.getProperty("file.separator") +
"vncsession.fbs");
// Construct new panel with file name field and "Browse" button.
Panel fnamePanel = new Panel();
GridBagLayout fnameGridbag = new GridBagLayout();
fnamePanel.setLayout(fnameGridbag);
GridBagConstraints fnameConstraints = new GridBagConstraints();
fnameConstraints.gridwidth = GridBagConstraints.RELATIVE;
fnameConstraints.fill = GridBagConstraints.BOTH;
fnameConstraints.weightx = 4.0;
fnameField = new TextField(fname, 64);
fnameGridbag.setConstraints(fnameField, fnameConstraints);
fnamePanel.add(fnameField);
fnameField.addActionListener(this);
fnameConstraints.gridwidth = GridBagConstraints.REMAINDER;
fnameConstraints.weightx = 1.0;
browseButton = new Button("Browse");
fnameGridbag.setConstraints(browseButton, fnameConstraints);
fnamePanel.add(browseButton);
browseButton.addActionListener(this);
// Construct the frame.
GridBagLayout gridbag = new GridBagLayout();
setLayout(gridbag);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.fill = GridBagConstraints.BOTH;
gbc.weighty = 1.0;
gbc.insets = new Insets(10, 0, 0, 0);
Label helpLabel =
new Label("File name to save next recorded session in:", Label.CENTER);
gridbag.setConstraints(helpLabel, gbc);
add(helpLabel);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weighty = 0.0;
gbc.insets = new Insets(0, 0, 0, 0);
gridbag.setConstraints(fnamePanel, gbc);
add(fnamePanel);
gbc.fill = GridBagConstraints.BOTH;
gbc.weighty = 1.0;
gbc.insets = new Insets(10, 0, 10, 0);
statusLabel = new Label("", Label.CENTER);
gridbag.setConstraints(statusLabel, gbc);
add(statusLabel);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gbc.gridwidth = 1;
gbc.insets = new Insets(0, 0, 0, 0);
recordButton = new Button("Record");
gridbag.setConstraints(recordButton, gbc);
add(recordButton);
recordButton.addActionListener(this);
nextButton = new Button("Next file");
gridbag.setConstraints(nextButton, gbc);
add(nextButton);
nextButton.addActionListener(this);
closeButton = new Button("Close");
gridbag.setConstraints(closeButton, gbc);
add(closeButton);
closeButton.addActionListener(this);
// Set correct text, font and color for the statusLabel.
stopRecording();
pack();
addWindowListener(this);
}
//
// If the given string ends with ".NNN" where NNN is a decimal
// number, increase this number by one. Otherwise, append ".001"
// to the given string.
//
protected String nextFilename(String fname) {
int len = fname.length();
int suffixPos = len;
int suffixNum = 1;
if (len > 4 && fname.charAt(len - 4) == '.') {
try {
suffixNum = Integer.parseInt(fname.substring(len - 3, len)) + 1;
suffixPos = len - 4;
} catch (NumberFormatException e) { }
}
char[] zeroes = {'0', '0', '0'};
String suffix = String.valueOf(suffixNum);
if (suffix.length() < 3) {
suffix = new String(zeroes, 0, 3 - suffix.length()) + suffix;
}
return fname.substring(0, suffixPos) + '.' + suffix;
}
//
// Find next name of a file which does not exist yet.
//
protected String nextNewFilename(String fname) {
String newName = fname;
File f;
try {
do {
newName = nextFilename(newName);
f = new File(newName);
} while (f.exists());
} catch (SecurityException e) { }
return newName;
}
//
// Let the user choose a file name showing a FileDialog.
//
protected boolean browseFile() {
File currentFile = new File(fnameField.getText());
FileDialog fd =
new FileDialog(this, "Save next session as...", FileDialog.SAVE);
fd.setDirectory(currentFile.getParent());
fd.setVisible(true);
if (fd.getFile() != null) {
String newDir = fd.getDirectory();
String sep = System.getProperty("file.separator");
if (newDir.length() > 0) {
if (!sep.equals(newDir.substring(newDir.length() - sep.length())))
newDir += sep;
}
String newFname = newDir + fd.getFile();
if (newFname.equals(fnameField.getText())) {
fnameField.setText(newFname);
return true;
}
}
return false;
}
//
// Start recording.
//
public void startRecording() {
statusLabel.setText("Status: Recording...");
statusLabel.setFont(new Font("Helvetica", Font.BOLD, 12));
statusLabel.setForeground(Color.red);
recordButton.setLabel("Stop recording");
recording = true;
viewer.setRecordingStatus(fnameField.getText());
}
//
// Stop recording.
//
public void stopRecording() {
statusLabel.setText("Status: Not recording.");
statusLabel.setFont(new Font("Helvetica", Font.PLAIN, 12));
statusLabel.setForeground(Color.black);
recordButton.setLabel("Record");
recording = false;
viewer.setRecordingStatus(null);
}
//
// Close our window properly.
//
public void windowClosing(WindowEvent evt) {
setVisible(false);
}
//
// Ignore window events we're not interested in.
//
public void windowActivated(WindowEvent evt) {}
public void windowDeactivated (WindowEvent evt) {}
public void windowOpened(WindowEvent evt) {}
public void windowClosed(WindowEvent evt) {}
public void windowIconified(WindowEvent evt) {}
public void windowDeiconified(WindowEvent evt) {}
//
// Respond to button presses
//
public void actionPerformed(ActionEvent evt) {
if (evt.getSource() == browseButton) {
if (browseFile() && recording)
startRecording();
} else if (evt.getSource() == recordButton) {
if (!recording) {
startRecording();
} else {
stopRecording();
fnameField.setText(nextNewFilename(fnameField.getText()));
}
} else if (evt.getSource() == nextButton) {
fnameField.setText(nextNewFilename(fnameField.getText()));
if (recording)
startRecording();
} else if (evt.getSource() == closeButton) {
setVisible(false);
}
}
}