@Override
protected void showInformationControl(Rectangle subjectArea) {
    if (fControl instanceof IWidgetTokenOwnerExtension && fControl instanceof IWidgetTokenOwner) {
        IWidgetTokenOwnerExtension extension = (IWidgetTokenOwnerExtension) fControl;
        if (extension.requestWidgetToken(this, WIDGET_PRIORITY)) {
            super.showInformationControl(subjectArea);
        }
    } else if (fControl instanceof IWidgetTokenOwner) {
        IWidgetTokenOwner owner = (IWidgetTokenOwner) fControl;
        if (owner.requestWidgetToken(this)) {
            super.showInformationControl(subjectArea);
        }

    } else {
        super.showInformationControl(subjectArea);
    }
}
 

protected void releaseWidgetToken() {
	ISourceViewer viewer = editor.getInternalSourceViewer();
	if (viewer instanceof IWidgetTokenOwner) {
		IWidgetTokenOwner widgetTokenOwner = (IWidgetTokenOwner) viewer;
		widgetTokenOwner.releaseWidgetToken(this);
	}
}
 

private void releaseWidgetToken() {
	ISourceViewer viewer= fEditor.getViewer();
	if (viewer instanceof IWidgetTokenOwner) {
		IWidgetTokenOwner widgetTokenOwner= (IWidgetTokenOwner) viewer;
		widgetTokenOwner.releaseWidgetToken(this);
	}
}
 

@Override
public boolean requestWidgetToken(IWidgetTokenOwner owner, int priority) {
	if (priority > WIDGET_PRIORITY) {
		if (fPopup != null && !fPopup.isDisposed()) {
			fPopup.setVisible(false);
		}
		return true;
	}
	return false;
}
 

/**
 * @see org.eclipse.jface.text.IWidgetTokenKeeperExtension#requestWidgetToken(org.eclipse.jface.text.IWidgetTokenOwner,
 *      int)
 */
public boolean requestWidgetToken(IWidgetTokenOwner owner, int priority)
{
	if (priority > WIDGET_PRIORITY)
	{
		hide();
		return true;
	}
	return false;
}
 

/**
 * @see org.eclipse.jface.text.IWidgetTokenKeeperExtension#setFocus(org.eclipse.jface.text.IWidgetTokenOwner)
 */
public boolean setFocus(IWidgetTokenOwner owner)
{
	if (fProposalPopup != null)
	{
		fProposalPopup.setFocus();
		return fProposalPopup.hasFocus();
	}
	return false;
}
 

private void releaseWidgetToken() {
	ISourceViewer viewer= fEditor.getViewer();
	if (viewer instanceof IWidgetTokenOwner) {
		IWidgetTokenOwner widgetTokenOwner= (IWidgetTokenOwner) viewer;
		widgetTokenOwner.releaseWidgetToken(this);
	}
}
 

public boolean requestWidgetToken(IWidgetTokenOwner owner, int priority) {
	if (priority > WIDGET_PRIORITY) {
		if (fPopup != null && !fPopup.isDisposed()) {
			fPopup.setVisible(false);
		}
		return true;
	}
	return false;
}
 

@Override
protected void handleInformationControlDisposed() {
    try {
        super.handleInformationControlDisposed();
    } finally {
        if (fControl instanceof IWidgetTokenOwner) {
            IWidgetTokenOwner owner = (IWidgetTokenOwner) fControl;
            owner.releaseWidgetToken(this);
        }
    }
}
 

@Override
public boolean requestWidgetToken(IWidgetTokenOwner owner, int priority) {
	return false;
}
 

@Override
public boolean setFocus(IWidgetTokenOwner owner) {
	if (toolBar != null && !toolBar.isDisposed())
		showMenu(toolBar);
	return true;
}
 

@Override
public boolean requestWidgetToken(IWidgetTokenOwner owner) {
	return false;
}
 

@Override
public boolean requestWidgetToken(IWidgetTokenOwner owner) {
	return false;
}
 

@Override
public boolean setFocus(IWidgetTokenOwner owner) {
	if (fToolBar != null && ! fToolBar.isDisposed())
		showMenu(fToolBar);
	return true;
}
 

/**
 * @see org.eclipse.jface.text.IWidgetTokenKeeper#requestWidgetToken(org.eclipse.jface.text.IWidgetTokenOwner)
 */
public boolean requestWidgetToken(IWidgetTokenOwner owner)
{
	return false;
}
 

public boolean requestWidgetToken(IWidgetTokenOwner owner) {
	return false;
}
 

public boolean setFocus(IWidgetTokenOwner owner) {
	if (fToolBar != null && ! fToolBar.isDisposed())
		showMenu(fToolBar);
	return true;
}
 

@Override
public void hideInformationControl(boolean activateEditor, boolean restoreFocus) {
    //When hiding it may call hide again (because as it gets hidden our handlers are still connected).
    if (this.onHide) {
        return;
    }
    this.onHide = true;
    try {
        try {
            super.hideInformationControl();
        } finally {
            if (fControl instanceof IWidgetTokenOwner) {
                IWidgetTokenOwner owner = (IWidgetTokenOwner) fControl;
                owner.releaseWidgetToken(this);
            }
        }
        this.disposeInformationControl();

        //Restore previous active shell?
        if (this.fInitiallyActiveShell != null && !this.fInitiallyActiveShell.isDisposed()) {
            if (restoreFocus) {
                this.fInitiallyActiveShell.setActive();
            }
            this.fInitiallyActiveShell = null;
        }

        if (this.fFocusControl != null && !this.fFocusControl.isDisposed()) {
            if (restoreFocus) {
                this.fFocusControl.setFocus();
            }
            this.fFocusControl = null;
        }

        if (activateEditor) {
            KeyBindingHelper.executeCommand("org.eclipse.ui.window.activateEditor");
        }
    } finally {
        this.onHide = false;
    }

}
 

@Override
public boolean requestWidgetToken(IWidgetTokenOwner owner) {
    return false;
}
 

@Override
public boolean requestWidgetToken(IWidgetTokenOwner owner, int priority) {
    return false;
}
 

@Override
public boolean setFocus(IWidgetTokenOwner owner) {
    return false;
}