Resolves: rhbz#1401082 gnome hangs opening a certain .docx

this seems to be a problem since....

commit 199eb08b
Author: Miklos Vajna <vmiklos@collabora.co.uk>
Date:   Thu Jun 5 16:25:01 2014 +0200

    SwAnchoredDrawObject::GetObjBoundRect: avoid SwDoc::SetModified()

    This is a const method, but it does a const_cast to still resize an
    object... if that's so, then we should ensure that the "is modified"
    flag of SwDoc is untouched.

    CppunitTest_sw_ooxmlimport's testChartSize is a reproducer for this,
    when shape text is imported as textbox.

(note under gtk3 and wayland this isn't as noticable, there use
export GDK_BACKEND=x11 to reproduce the freeze effect where even
the mouse cursor doesn't move during part of the load)

Change-Id: Ic0bd98b032dfe1255d79d8070d50f65fcfa676dd
Reviewed-on: https://gerrit.libreoffice.org/31687Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

sw/inc/IDocumentState.hxx

@@ -49,6 +49,9 @@ public:
 
     virtual void SetLoaded() = 0;
 
+    virtual bool IsEnableSetModified() const = 0;
+    virtual void SetEnableSetModified(bool bEnableSetModified) = 0;
+
 protected:
     virtual ~IDocumentState() {};
 };

sw/source/core/doc/DocumentStateManager.cxx

@@ -29,6 +29,7 @@ namespace sw
 
 DocumentStateManager::DocumentStateManager( SwDoc& i_rSwdoc ) :
     m_rDoc( i_rSwdoc ),
+    mbEnableSetModified(true),
     mbModified(false),
     mbLoaded(false),
     mbUpdateExpField(false),
@@ -39,6 +40,9 @@ DocumentStateManager::DocumentStateManager( SwDoc& i_rSwdoc ) :
 
 void DocumentStateManager::SetModified()
 {
+    if (!IsEnableSetModified())
+        return;
+
     m_rDoc.GetDocumentLayoutManager().ClearSwLayouterEntries();
     mbModified = true;
     m_rDoc.GetDocumentStatisticsManager().SetDocStatModified( true );
@@ -75,6 +79,16 @@ bool DocumentStateManager::IsModified() const
     return mbModified;
 }
 
+bool DocumentStateManager::IsEnableSetModified() const
+{
+    return mbEnableSetModified;
+}
+
+void DocumentStateManager::SetEnableSetModified(bool bEnableSetModified)
+{
+    mbEnableSetModified = bEnableSetModified;
+}
+
 bool DocumentStateManager::IsInCallModified() const
 {
     return mbInCallModified;

sw/source/core/inc/DocumentStateManager.hxx

@@ -36,6 +36,8 @@ public:
     void SetModified() override;
     void ResetModified() override;
     bool IsModified() const override;
+    bool IsEnableSetModified() const override;
+    void SetEnableSetModified(bool bEnableSetModified) override;
     bool IsInCallModified() const override;
     bool IsUpdateExpField() const override;
     bool IsNewDoc() const override;
@@ -50,9 +52,10 @@ private:
 
     SwDoc& m_rDoc;
 
+    bool mbEnableSetModified; //< FALSE: changing document modification status (temporarily) locked
     bool mbModified      ;    //< TRUE: document has changed.
     bool mbLoaded        ;    //< TRUE: Doc loaded.
-    bool mbUpdateExpField  ;    //< TRUE: Update expression fields.
+    bool mbUpdateExpField;    //< TRUE: Update expression fields.
     bool mbNewDoc        ;    //< TRUE: new Doc.
     bool mbInCallModified;    //< TRUE: in Set/Reset-Modified link.
 };

sw/source/core/layout/anchoreddrawobject.cxx

@@ -660,12 +660,13 @@ const SwRect SwAnchoredDrawObject::GetObjBoundRect() const
         if ( nTargetWidth != aCurrObjRect.GetWidth( ) || nTargetHeight != aCurrObjRect.GetHeight( ) )
         {
             SwDoc* pDoc = const_cast<SwDoc*>(GetPageFrame()->GetFormat()->GetDoc());
-            bool bModified = pDoc->getIDocumentState().IsModified();
+
+            bool bEnableSetModified = pDoc->getIDocumentState().IsEnableSetModified();
+            pDoc->getIDocumentState().SetEnableSetModified(false);
             const_cast< SdrObject* >( GetDrawObj() )->Resize( aCurrObjRect.TopLeft(),
                     Fraction( nTargetWidth, aCurrObjRect.GetWidth() ),
                     Fraction( nTargetHeight, aCurrObjRect.GetHeight() ), false );
-            if (!bModified)
-                pDoc->getIDocumentState().ResetModified();
+            pDoc->getIDocumentState().SetEnableSetModified(bEnableSetModified);
         }
     }
     return GetDrawObj()->GetCurrentBoundRect();