use more OInterfaceContainerHelper3 in SvxShapeCollection

which requires adding a getInterface method to OInterfaceContainerHelper3

Change-Id: I0962aa42c19859d7b78c998b8b4448a7ebfc19e4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/125981
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/comphelper/interfacecontainer3.hxx b/include/comphelper/interfacecontainer3.hxx
index 82fa1f5e6b3d..9d4709918024 100644
--- a/include/comphelper/interfacecontainer3.hxx
+++ b/include/comphelper/interfacecontainer3.hxx
@@ -166,6 +166,9 @@ public:
                 the new count of elements in the container
     */
     sal_Int32 removeInterface(const css::uno::Reference<ListenerT>& rxIFace);
+    /** Return an interface by index
+    */
+    const css::uno::Reference<ListenerT>& getInterface(sal_Int32 nIndex) const;
     /**
       Call disposing on all object in the container that
       support XEventListener. Then clear the container.
@@ -320,6 +323,15 @@ sal_Int32 OInterfaceContainerHelper3<ListenerT>::removeInterface(
 }
 
 template <class ListenerT>
+const css::uno::Reference<ListenerT>&
+OInterfaceContainerHelper3<ListenerT>::getInterface(sal_Int32 nIndex) const
+{
+    osl::MutexGuard aGuard(rMutex);
+
+    return (*maData)[nIndex];
+}
+
+template <class ListenerT>
 void OInterfaceContainerHelper3<ListenerT>::disposeAndClear(const css::lang::EventObject& rEvt)
 {
     osl::ClearableMutexGuard aGuard(rMutex);