public MergeSourceViewer(
SourceViewer sourceViewer, ResourceBundle bundle, ICompareContainer container) {
Assert.isNotNull(sourceViewer);
fSourceViewer = sourceViewer;
fResourceBundle = bundle;
fContainer = container;
MenuManager menu = new MenuManager();
menu.setRemoveAllWhenShown(true);
menu.addMenuListener(this);
StyledText te = getSourceViewer().getTextWidget();
te.setMenu(menu.createContextMenu(te));
fContainer.registerContextMenu(menu, getSourceViewer());
// for listening to editor show/hide line number preference value
fPreferenceChangeListener =
new IPropertyChangeListener() {
public void propertyChange(PropertyChangeEvent event) {
MergeSourceViewer.this.handlePropertyChangeEvent(event);
}
};
EditorsUI.getPreferenceStore().addPropertyChangeListener(fPreferenceChangeListener);
fShowLineNumber =
EditorsUI.getPreferenceStore()
.getBoolean(AbstractDecoratedTextEditorPreferenceConstants.EDITOR_LINE_NUMBER_RULER);
if (fShowLineNumber) {
updateLineNumberRuler();
}
IOperationHistory history = getHistory();
if (history != null) history.addOperationHistoryListener(this);
// don't add save when in a dialog, IWorkbenchPart is null in dialog containers
fAddSaveAction = fContainer.getWorkbenchPart() != null;
}
/**
* Internal hook method called when the input to this viewer is initially set or subsequently
* changed.
*
* <p>The <code>ContentMergeViewer</code> implementation of this <code>Viewer</code> method tries
* to save the old input by calling <code>doSave(...)</code> and then calls <code>
* internalRefresh(...)</code> .
*
* @param input the new input of this viewer, or <code>null</code> if there is no new input
* @param oldInput the old input element, or <code>null</code> if there was previously no input
*/
protected final void inputChanged(Object input, Object oldInput) {
if (input != oldInput && oldInput != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.removeListener(labelChangeListener);
}
if (input != oldInput && oldInput instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.removeCompareInputChangeListener(
(ICompareInput) oldInput, fCompareInputChangeListener);
}
boolean success = doSave(input, oldInput);
if (input != oldInput && input instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.addCompareInputChangeListener((ICompareInput) input, fCompareInputChangeListener);
}
if (input != oldInput && input != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.addListener(labelChangeListener);
}
if (success) {
setLeftDirty(false);
setRightDirty(false);
}
if (input != oldInput) internalRefresh(input);
}
/**
* Called on the viewer disposal. Unregisters from the compare configuration. Clients may extend
* if they have to do additional cleanup.
*
* @see org.eclipse.jface.viewers.ContentViewer#handleDispose(org.eclipse.swt.events.DisposeEvent)
*/
protected void handleDispose(DisposeEvent event) {
if (fHandlerService != null) fHandlerService.dispose();
Object input = getInput();
if (input instanceof ICompareInput) {
ICompareContainer container = getCompareConfiguration().getContainer();
container.removeCompareInputChangeListener(
(ICompareInput) input, fCompareInputChangeListener);
}
if (input != null) {
ICompareInputLabelProvider lp = getCompareConfiguration().getLabelProvider();
if (lp != null) lp.removeListener(labelChangeListener);
}
if (fPropertyChangeListener != null) {
fCompareConfiguration.removePropertyChangeListener(fPropertyChangeListener);
fPropertyChangeListener = null;
}
fAncestorLabel = null;
fLeftLabel = null;
fDirectionLabel = null;
fRightLabel = null;
fCenter = null;
if (fRightArrow != null) {
fRightArrow.dispose();
fRightArrow = null;
}
if (fLeftArrow != null) {
fLeftArrow.dispose();
fLeftArrow = null;
}
if (fBothArrow != null) {
fBothArrow.dispose();
fBothArrow = null;
}
if (fNormalCursor != null) {
fNormalCursor.dispose();
fNormalCursor = null;
}
if (fHSashCursor != null) {
fHSashCursor.dispose();
fHSashCursor = null;
}
if (fVSashCursor != null) {
fVSashCursor.dispose();
fVSashCursor = null;
}
if (fHVSashCursor != null) {
fHVSashCursor.dispose();
fHVSashCursor = null;
}
super.handleDispose(event);
}
public static CompareHandlerService createFor(ICompareContainer container, Shell shell) {
IServiceLocator serviceLocator = container.getServiceLocator();
if (serviceLocator != null) {
IHandlerService service = (IHandlerService) serviceLocator.getService(IHandlerService.class);
if (service != null) return new CompareHandlerService(container, null);
}
if (container.getWorkbenchPart() == null && shell != null) {
// We're in a dialog so we can use an active shell expression
IHandlerService service =
(IHandlerService) PlatformUI.getWorkbench().getService(IHandlerService.class);
if (service != null) {
Expression e = new ActiveShellExpression(shell);
return new CompareHandlerService(container, e);
}
}
return new CompareHandlerService(null, null);
}
private void initialize() {
if (fHandlerService == null) {
IServiceLocator serviceLocator = fContainer.getServiceLocator();
if (serviceLocator != null) {
IHandlerService service =
(IHandlerService) serviceLocator.getService(IHandlerService.class);
if (service != null) fHandlerService = service;
}
if (fHandlerService == null && fContainer.getWorkbenchPart() == null && fExpression != null) {
// We're in a dialog so we can use an active shell expression
IHandlerService service =
(IHandlerService) PlatformUI.getWorkbench().getService(IHandlerService.class);
if (service != null) {
fHandlerService = service;
}
}
}
}
private void addSave(IMenuManager menu) {
ICommandService commandService =
(ICommandService) fContainer.getWorkbenchPart().getSite().getService(ICommandService.class);
final Command command = commandService.getCommand(IWorkbenchCommandConstants.FILE_SAVE);
final IHandler handler = command.getHandler();
if (handler != null) {
if (fSaveContributionItem == null) {
fSaveContributionItem =
new CommandContributionItem(
new CommandContributionItemParameter(
fContainer.getWorkbenchPart().getSite(),
null,
command.getId(),
CommandContributionItem.STYLE_PUSH));
}
// save is an editable dependent action, ie add only when edit
// is possible
if (handler.isHandled() && getSourceViewer().isEditable()) menu.add(fSaveContributionItem);
}
}
private IActionBars getActionBars() {
return fContainer.getActionBars();
}
