Don't crash on exiting print preview with Notebookbar

Crash caused by this sequence (tested in Writer):

1. Closing print preview, frame is attached to controller;
2. This calls SfxNotebookBar::StateMethod
3. There notebookbar's listener is added to list of the controller's
   context change event listeners
4. Then in SwPagePreview::~SwPagePreview, notebookbar's listener is
   added to that list again
5. ContextChangeEventMultiplexer::addContextChangeEventListener
   detects second addition, and throws an unhandled exception.

I don't know why starting listening is needed in SwPagePreview dtor;
unfortunately commit d05b7b32d9ecb6fcb4a268eb68cdcee09bafa6dd doesn't
say much about context and reasons.

ControlListener is renamed to ControlListenerForCurrentController to
emphasize that it operates on the current controller of notebookbar's
frame; and its bListen parameter meaning was reverted: previously its
"true" value awkwardly meant "stop listening". All direct operations
with listener of notebookbar are replaced with calls to notebookbar's
methods.

In ContextChangeEventMultiplexer::addContextChangeEventListener,
uno::UNO_QUERY_THROW was replaced with uno::UNO_QUERY, because not
only chart controller may appear here, and it's not an error: e.g.
SfxBaseController doesn't implement lang::XServiceInfo.

Regression after commit d05b7b32d9ecb6fcb4a268eb68cdcee09bafa6dd.

Change-Id: Ief1aed188d8f02a6cfe3ea25f4d082dfdf449f32
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/86257
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

1 files changed, 25 insertions, 7 deletions

diff --git a/vcl/source/control/notebookbar.cxx b/vcl/source/control/notebookbar.cxx
index 6ddc1c662c91..08f82b49a772 100644
--- a/vcl/source/control/notebookbar.cxx
+++ b/vcl/source/control/notebookbar.cxx
@@ -97,6 +97,7 @@ void NotebookBar::dispose()
         m_pSystemWindow->GetTaskPaneList()->RemoveWindow(this);
     m_pSystemWindow.clear();
     disposeBuilder();
+    assert(m_alisteningControllers.empty());
     m_pEventListener.clear();
     Control::dispose();
 }
@@ -180,24 +181,41 @@ void SAL_CALL NotebookBarContextChangeEventListener::notifyContextChangeEvent(co
     }
 }
 
-void NotebookBar::ControlListener(bool bListen)
+void NotebookBar::ControlListenerForCurrentController(bool bListen)
 {
+    auto xController = mxFrame->getController();
     if(bListen)
     {
-        // remove listeners
-        css::uno::Reference<css::ui::XContextChangeEventMultiplexer> xMultiplexer (css::ui::ContextChangeEventMultiplexer::get(
+        // add listeners
+        if (m_alisteningControllers.count(xController) == 0)
+        {
+            auto xMultiplexer(css::ui::ContextChangeEventMultiplexer::get(
                 ::comphelper::getProcessComponentContext()));
-        xMultiplexer->removeContextChangeEventListener(getContextChangeEventListener(),mxFrame->getController());
+            xMultiplexer->addContextChangeEventListener(m_pEventListener, xController);
+            m_alisteningControllers.insert(xController);
+        }
     }
     else
     {
-        // add listeners
-        css::uno::Reference<css::ui::XContextChangeEventMultiplexer> xMultiplexer (css::ui::ContextChangeEventMultiplexer::get(
+        // remove listeners
+        if (m_alisteningControllers.count(xController))
+        {
+            auto xMultiplexer(css::ui::ContextChangeEventMultiplexer::get(
                 ::comphelper::getProcessComponentContext()));
-        xMultiplexer->addContextChangeEventListener(getContextChangeEventListener(),mxFrame->getController());
+            xMultiplexer->removeContextChangeEventListener(m_pEventListener, xController);
+            m_alisteningControllers.erase(xController);
+        }
     }
 }
 
+void NotebookBar::StopListeningAllControllers()
+{
+    auto xMultiplexer(
+        css::ui::ContextChangeEventMultiplexer::get(comphelper::getProcessComponentContext()));
+    xMultiplexer->removeAllContextChangeEventListeners(m_pEventListener);
+    m_alisteningControllers.clear();
+}
+
 void SAL_CALL NotebookBarContextChangeEventListener::disposing(const ::css::lang::EventObject&)
 {
     mpParent.clear();