@Inject
public StartStopScanningAction(
ScannerDispatcherThreadFactory scannerThreadFactory,
StateMachine stateMachine,
ResultTable resultTable,
StatusBar statusBar,
FeederGUIRegistry feederRegistry,
PingerRegistry pingerRegistry,
@Named("startStopButton") Button startStopButton,
GUIConfig guiConfig) {
this(startStopButton.getDisplay());
this.scannerThreadFactory = scannerThreadFactory;
this.resultTable = resultTable;
this.statusBar = statusBar;
this.feederRegistry = feederRegistry;
this.pingerRegistry = pingerRegistry;
this.button = startStopButton;
this.stateMachine = stateMachine;
this.guiConfig = guiConfig;
// add listeners to all state changes
stateMachine.addTransitionListener(this);
// set the default image
ScanningState state = stateMachine.getState();
button.setImage(buttonImages[state.ordinal()]);
button.setText(buttonTexts[state.ordinal()]);
}
public void transitionTo(final ScanningState state, final Transition transition) {
if (statusBar.isDisposed() || transition == Transition.INIT) return;
// TODO: separate GUI and non-GUI stuff
switch (state) {
case IDLE:
// reset state text
button.setEnabled(true);
updateProgress(null, 0, 0);
statusBar.setStatusText(null);
break;
case STARTING:
// start the scan from scratch!
resultTable.removeAll();
try {
scannerThread =
scannerThreadFactory.createScannerThread(
feederRegistry.createFeeder(),
StartStopScanningAction.this,
createResultsCallback(state));
stateMachine.startScanning();
mainWindowTitle = statusBar.getShell().getText();
} catch (RuntimeException e) {
stateMachine.reset();
throw e;
}
break;
case RESTARTING:
// restart the scanning - rescan
resultTable.resetSelection();
try {
scannerThread =
scannerThreadFactory.createScannerThread(
feederRegistry.createRescanFeeder(resultTable.getSelection()),
StartStopScanningAction.this,
createResultsCallback(state));
stateMachine.startScanning();
mainWindowTitle = statusBar.getShell().getText();
} catch (RuntimeException e) {
stateMachine.reset();
throw e;
}
break;
case SCANNING:
scannerThread.start();
break;
case STOPPING:
statusBar.setStatusText(Labels.getLabel("state.waitForThreads"));
break;
case KILLING:
button.setEnabled(false);
statusBar.setStatusText(Labels.getLabel("state.killingThreads"));
break;
}
// change button image
button.setImage(buttonImages[state.ordinal()]);
button.setText(buttonTexts[state.ordinal()]);
}
/**
* Start/Stop button action class. It listens to presses on the buttons as well as updates gui
* statuses
*
* @author Anton Keks
*/
@Singleton
public class StartStopScanningAction
implements SelectionListener, ScanningProgressCallback, StateTransitionListener {
private ScannerDispatcherThreadFactory scannerThreadFactory;
private ScannerDispatcherThread scannerThread;
private GUIConfig guiConfig;
private PingerRegistry pingerRegistry;
private String mainWindowTitle;
private StatusBar statusBar;
private ResultTable resultTable;
private FeederGUIRegistry feederRegistry;
private Button button;
Image[] buttonImages = new Image[ScanningState.values().length];
String[] buttonTexts = new String[ScanningState.values().length];
private Display display;
private StateMachine stateMachine;
/** Creates internal stuff independent from all other external dependencies */
StartStopScanningAction(Display display) {
this.display = display;
// preload button images
buttonImages[ScanningState.IDLE.ordinal()] =
new Image(display, Labels.getInstance().getImageAsStream("button.start.img"));
buttonImages[ScanningState.SCANNING.ordinal()] =
new Image(display, Labels.getInstance().getImageAsStream("button.stop.img"));
buttonImages[ScanningState.STARTING.ordinal()] = buttonImages[ScanningState.SCANNING.ordinal()];
buttonImages[ScanningState.RESTARTING.ordinal()] =
buttonImages[ScanningState.SCANNING.ordinal()];
buttonImages[ScanningState.STOPPING.ordinal()] =
new Image(display, Labels.getInstance().getImageAsStream("button.kill.img"));
buttonImages[ScanningState.KILLING.ordinal()] = buttonImages[ScanningState.STOPPING.ordinal()];
// preload button texts
buttonTexts[ScanningState.IDLE.ordinal()] = Labels.getLabel("button.start");
buttonTexts[ScanningState.SCANNING.ordinal()] = Labels.getLabel("button.stop");
buttonTexts[ScanningState.STARTING.ordinal()] = buttonTexts[ScanningState.SCANNING.ordinal()];
buttonTexts[ScanningState.RESTARTING.ordinal()] = buttonTexts[ScanningState.SCANNING.ordinal()];
buttonTexts[ScanningState.STOPPING.ordinal()] = Labels.getLabel("button.kill");
buttonTexts[ScanningState.KILLING.ordinal()] = Labels.getLabel("button.kill");
}
@Inject
public StartStopScanningAction(
ScannerDispatcherThreadFactory scannerThreadFactory,
StateMachine stateMachine,
ResultTable resultTable,
StatusBar statusBar,
FeederGUIRegistry feederRegistry,
PingerRegistry pingerRegistry,
@Named("startStopButton") Button startStopButton,
GUIConfig guiConfig) {
this(startStopButton.getDisplay());
this.scannerThreadFactory = scannerThreadFactory;
this.resultTable = resultTable;
this.statusBar = statusBar;
this.feederRegistry = feederRegistry;
this.pingerRegistry = pingerRegistry;
this.button = startStopButton;
this.stateMachine = stateMachine;
this.guiConfig = guiConfig;
// add listeners to all state changes
stateMachine.addTransitionListener(this);
// set the default image
ScanningState state = stateMachine.getState();
button.setImage(buttonImages[state.ordinal()]);
button.setText(buttonTexts[state.ordinal()]);
}
/** Called when scanning button is clicked */
public void widgetDefaultSelected(SelectionEvent e) {
widgetSelected(e);
}
/** Called when scanning button is clicked */
public void widgetSelected(SelectionEvent event) {
// ask for confirmation before erasing scanning results
if (stateMachine.inState(ScanningState.IDLE)) {
if (!preScanChecks()) return;
}
ScanMenuActions.isLoadedFromFile = false;
stateMachine.transitionToNext();
}
private boolean preScanChecks() {
// autodetect usable pingers and silently ignore any changes -
// user should see any errors only if they have explicitly selected a pinger
pingerRegistry.checkSelectedPinger();
// ask user for confirmation if needed
if (guiConfig.askScanConfirmation && resultTable.getItemCount() > 0) {
MessageBox box =
new MessageBox(resultTable.getShell(), SWT.ICON_QUESTION | SWT.YES | SWT.NO | SWT.SHEET);
box.setText(Labels.getLabel("text.scan.new"));
box.setMessage(Labels.getLabel("text.scan.confirmation"));
if (box.open() != SWT.YES) {
return false;
}
}
return true;
}
public void transitionTo(final ScanningState state, final Transition transition) {
if (statusBar.isDisposed() || transition == Transition.INIT) return;
// TODO: separate GUI and non-GUI stuff
switch (state) {
case IDLE:
// reset state text
button.setEnabled(true);
updateProgress(null, 0, 0);
statusBar.setStatusText(null);
break;
case STARTING:
// start the scan from scratch!
resultTable.removeAll();
try {
scannerThread =
scannerThreadFactory.createScannerThread(
feederRegistry.createFeeder(),
StartStopScanningAction.this,
createResultsCallback(state));
stateMachine.startScanning();
mainWindowTitle = statusBar.getShell().getText();
} catch (RuntimeException e) {
stateMachine.reset();
throw e;
}
break;
case RESTARTING:
// restart the scanning - rescan
resultTable.resetSelection();
try {
scannerThread =
scannerThreadFactory.createScannerThread(
feederRegistry.createRescanFeeder(resultTable.getSelection()),
StartStopScanningAction.this,
createResultsCallback(state));
stateMachine.startScanning();
mainWindowTitle = statusBar.getShell().getText();
} catch (RuntimeException e) {
stateMachine.reset();
throw e;
}
break;
case SCANNING:
scannerThread.start();
break;
case STOPPING:
statusBar.setStatusText(Labels.getLabel("state.waitForThreads"));
break;
case KILLING:
button.setEnabled(false);
statusBar.setStatusText(Labels.getLabel("state.killingThreads"));
break;
}
// change button image
button.setImage(buttonImages[state.ordinal()]);
button.setText(buttonTexts[state.ordinal()]);
}
/**
* @return the appropriate ResultsCallback instance, depending on the configured display method.
*/
private ScanningResultCallback createResultsCallback(ScanningState state) {
// rescanning must follow the same strategy of displaying all hosts (even the dead ones),
// because the results are already in the list
if (guiConfig.displayMethod == DisplayMethod.ALL || state == ScanningState.RESTARTING) {
return new ScanningResultCallback() {
public void prepareForResults(ScanningResult result) {
resultTable.addOrUpdateResultRow(result);
}
public void consumeResults(ScanningResult result) {
resultTable.addOrUpdateResultRow(result);
}
};
}
if (guiConfig.displayMethod == DisplayMethod.ALIVE) {
return new ScanningResultCallback() {
public void prepareForResults(ScanningResult result) {}
public void consumeResults(ScanningResult result) {
if (result.getType().ordinal() >= ResultType.ALIVE.ordinal())
resultTable.addOrUpdateResultRow(result);
}
};
}
if (guiConfig.displayMethod == DisplayMethod.PORTS) {
return new ScanningResultCallback() {
public void prepareForResults(ScanningResult result) {}
public void consumeResults(ScanningResult result) {
if (result.getType() == ResultType.WITH_PORTS) resultTable.addOrUpdateResultRow(result);
}
};
}
throw new UnsupportedOperationException(guiConfig.displayMethod.toString());
}
public void updateProgress(
final InetAddress currentAddress, final int runningThreads, final int percentageComplete) {
if (display.isDisposed()) return;
display.asyncExec(
new Runnable() {
public void run() {
if (statusBar.isDisposed()) return;
// update status bar
if (currentAddress != null) {
statusBar.setStatusText(
Labels.getLabel("state.scanning") + currentAddress.getHostAddress());
}
statusBar.setRunningThreads(runningThreads);
statusBar.setProgress(percentageComplete);
// show percentage in main window title
if (!stateMachine.inState(ScanningState.IDLE))
statusBar.getShell().setText(percentageComplete + "% - " + mainWindowTitle);
else statusBar.getShell().setText(mainWindowTitle);
// change button image according to the current state
button.setImage(buttonImages[stateMachine.getState().ordinal()]);
}
});
}
}