Question

I have a view which would like to be notified about all the currently opened editors. Where can I add a listener to achieve this?

I was expecting WorkbenchPage or EditorManager to have some appropriate listener registry, but I couldn’t find it.

Answer 1

Does your view uses a org.eclipse.ui.IPartListener2 ?

That is what is using this EditorListener, whose job is to react, for a given view, to Editor events (including open and close)

public class EditorListener implements ISelectionListener, IFileBufferListener, IPartListener2 {     protected BytecodeOutlineView view;      EditorListener(BytecodeOutlineView view){         this.view = view;     }  [...]       /**      * @see org.eclipse.ui.IPartListener2#partOpened(org.eclipse.ui.IWorkbenchPartReference)      */     public void partOpened(IWorkbenchPartReference partRef) {         view.handlePartVisible(partRef.getPart(false));     } 

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Now if your ViewPart directly implements an IPartListener2, it can register itself to the various Editors, like this BytecodeReferenceView

public class BytecodeReferenceView extends ViewPart implements IPartListener2, ISelectionListener {      [...]      public void createPartControl(Composite parent) {         browser = new Browser(parent, SWT.BORDER);         browser.setText(BytecodeOutlinePlugin.getResourceString(NLS_PREFIX             + 'empty.selection.text'));         final IWorkbenchWindow workbenchWindow = getSite().getWorkbenchWindow();         workbenchWindow.getPartService().addPartListener(this);     [...]