org.eclipse.ui.texteditor.IDocumentProvider#addElementStateListener ( )源码实例Demo

/**
 * Register the element state listener to react on the changes to the state (saved, dirty:=not saved) 
 */
protected void setDocumentProvider(IEditorInput input)
{
    super.setDocumentProvider(input);

    IDocumentProvider provider = getDocumentProvider();
    if (provider != null)
    {
        provider.addElementStateListener(new ElementStateAdapter() {
            public void elementDirtyStateChanged(Object element, boolean isDirty)
            {
                if (isDirty)
                {
                    contextService.deactivateContext(contextActivation);
                } else
                {
                    contextActivation = contextService.activateContext("toolbox.contexts.cleaneditor");
                }
            }
        });
    }
}
 

private void saveListener(ITextEditor textEditor) {
	IDocumentProvider provider = textEditor.getDocumentProvider();
	IEditorInput input = textEditor.getEditorInput();

	provider.addElementStateListener(new ResourceElementEventListener(input));
}
 

public void register(IDocumentProvider documentProvider, IEditorInput input) {

    Set<IEditorInput> inputs = documentProviders.get(documentProvider);

    if (inputs == null) {
      inputs = new HashSet<IEditorInput>();
      documentProviders.put(documentProvider, inputs);
    }

    if (inputs.contains(input)) return;

    if (inputs.size() == 0) documentProvider.addElementStateListener(this);

    inputs.add(input);
  }