LOK: queue-up events while processing client calls

To prevent feedback effects and improve performance,
we now queue up events fired during the processing
of a client call on the LOK API.

This has the advantage of giving us a chance to
compress redundant events and to combine others
(where possible) into fewer ones.

Change-Id: I2f6ea12c5d85205e6495cb130f6a6262534b6bb2
Reviewed-on: https://gerrit.libreoffice.org/28311
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>

1 files changed, 11 insertions, 2 deletions

diff --git a/desktop/inc/lib/init.hxx b/desktop/inc/lib/init.hxx
index 815f1ac6b4da..da03cfaf8843 100644
--- a/desktop/inc/lib/init.hxx
+++ b/desktop/inc/lib/init.hxx
@@ -35,8 +35,16 @@ namespace desktop {
         virtual void Invoke() override;
         static void callback(const int type, const char* payload, void* data);
         void queue(const int type, const char* data);
-        void setPartTilePainting(const bool bPartPainting);
-        bool isPartTilePainting() const;
+
+        /// When enabled events are queued but callback not invoked.
+        void setEventLatch(const bool bEventLatch)
+        {
+            m_bEventLatch = bEventLatch;
+        }
+
+        bool isEventLatchOn() const { return m_bEventLatch; }
+        void setPartTilePainting(const bool bPartPainting) { m_bPartTilePainting = bPartPainting; }
+        bool isPartTilePainting() const { return m_bPartTilePainting; }
 
     private:
         void flush();
@@ -48,6 +56,7 @@ namespace desktop {
         LibreOfficeKitCallback m_pCallback;
         void *m_pData;
         bool m_bPartTilePainting;
+        bool m_bEventLatch;
         std::mutex m_mutex;
     };