sc-perf: bundle SdrObject::BroadcastObjectChange() calls during Save

Test doc https://bugs.documentfoundation.org/attachment.cgi?id=128252 from
https://bugs.documentfoundation.org/show_bug.cgi?id=103493

ScPostIt::CreateCaptionFromInitData() called through
ScDocument::CreateAllNoteCaptions()

Incl.     Self  Called
Before:
326,418,830,114  487,308   6,645
After:
145,055,889,118  511,681   6,645

Reduced to 44% or speed-up by factor 2.25

Overall ScDocShell::SaveXML()
Before: 370,433,720,090
After: 189,120,982,786

Reduced to 51% or speed-up by factor 1.96

There's still too much broadcasting to accessibility going on though..

Change-Id: I50555fd9751ac24006cc96b2fa8e82b32aba0748

1 files changed, 20 insertions, 0 deletions

diff --git a/include/svx/svdobj.hxx b/include/svx/svdobj.hxx
index 48558684c3b8..b398a19071aa 100644
--- a/include/svx/svdobj.hxx
+++ b/include/svx/svdobj.hxx
@@ -295,6 +295,7 @@ private:
     friend class                SdrObjListIter;
     friend class                SdrVirtObj;
     friend class                SdrRectObj;
+    friend class                SdrDelayBroadcastObjectChange;
 
 protected:
     Rectangle                   aOutRect;     // surrounding rectangle for Paint (incl. LineWdt, ...)
@@ -351,6 +352,11 @@ protected:
     // #i25616#
     bool                        mbSupportTextIndentingOnLineWidthChange : 1;
 
+private:
+    bool                        mbDelayBroadcastObjectChange : 1;
+    mutable bool                mbBroadcastObjectChangePending : 1;
+
+protected:
     // on import of OLE object from MS documents the BLIP size might be retrieved,
     // in this case the following member is initialized as nonempty rectangle
     Rectangle                   maBLIPSizeRectangle;
@@ -968,6 +974,20 @@ private:
     bool mbDoNotInsertIntoPageAutomatically;
 };
 
+/** Suppress BroadcastObjectChange() until destruction of the (last) instance.
+    Prevents multiple broadcasts for a sequence of calls that would trigger a
+    broadcast each. Instances may be nested in levels, the outer instance will
+    trigger the final broadcast.
+ */
+class SVX_DLLPUBLIC SdrDelayBroadcastObjectChange
+{
+    SdrObject&  mrObj;
+    bool        mbOldDelayBroadcastObjectChange;
+public:
+    SdrDelayBroadcastObjectChange( SdrObject& rObj );
+    ~SdrDelayBroadcastObjectChange();
+};
+
 struct SdrObjCreatorParams
 {
     sal_uInt32 nInventor;