tdf#127235 break if object is larger than page

We will always have an overlap if the object is larger than the whole page.
Look for the next page style: if it is missing or the same as the current,
we simply stop.

Change-Id: I699d5146d215f17b4775dbcb32811fa5b6ebf60d
Reviewed-on: https://gerrit.libreoffice.org/78696
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/79104

3 files changed, 28 insertions, 2 deletions

diff --git a/sw/qa/extras/layout/data/tdf127235.odt b/sw/qa/extras/layout/data/tdf127235.odt
new file mode 100644
index 000000000000..5b27c921cf17
--- /dev/null
+++ b/sw/qa/extras/layout/data/tdf127235.odt
diff --git a/sw/qa/extras/layout/layout.cxx b/sw/qa/extras/layout/layout.cxx
index c2c6d2cd5b9d..ec568d69f767 100644
--- a/sw/qa/extras/layout/layout.cxx
+++ b/sw/qa/extras/layout/layout.cxx
@@ -67,6 +67,7 @@ public:
     void testTdf122878();
     void testTdf115094();
     void testTdf118719();
+    void testTdf127235();
 
     CPPUNIT_TEST_SUITE(SwLayoutWriter);
     CPPUNIT_TEST(testRedlineFootnotes);
@@ -106,6 +107,7 @@ public:
     CPPUNIT_TEST(testTdf122878);
     CPPUNIT_TEST(testTdf115094);
     CPPUNIT_TEST(testTdf118719);
+    CPPUNIT_TEST(testTdf127235);
     CPPUNIT_TEST_SUITE_END();
 
 private:
@@ -2728,6 +2730,13 @@ void SwLayoutWriter::testTdf118719()
     CPPUNIT_ASSERT_GREATER(nOther, nLast);
 }
 
+void SwLayoutWriter::testTdf127235()
+{
+    SwDoc* pDoc = createDoc("tdf127235.odt");
+    // This resulted in a layout loop.
+    pDoc->getIDocumentLayoutAccess().GetCurrentViewShell()->CalcLayout();
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(SwLayoutWriter);
 CPPUNIT_PLUGIN_IMPLEMENT();
 
diff --git a/sw/source/core/text/txtfly.cxx b/sw/source/core/text/txtfly.cxx
index e16cd878ce75..18bec6284a57 100644
--- a/sw/source/core/text/txtfly.cxx
+++ b/sw/source/core/text/txtfly.cxx
@@ -998,6 +998,24 @@ bool SwTextFly::ForEach( const SwRect &rRect, SwRect* pRect, bool bAvoid ) const
 {
     SwSwapIfSwapped swap(const_cast<SwTextFrame *>(m_pCurrFrame));
 
+    // Optimization
+    SwRectFnSet aRectFnSet(m_pCurrFrame);
+
+    // tdf#127235 stop if the area is larger than the page
+    if( aRectFnSet.GetHeight(pPage->getFrameArea()) < aRectFnSet.GetHeight(rRect))
+    {
+        // get the doc model description
+        const SwPageDesc* pPageDesc = pPage->GetPageDesc();
+
+        // if there is no next page style or it is the same as the current
+        // => stop trying to place the frame (it would end in an infinite loop)
+        if( pPageDesc &&
+            ( !pPageDesc->GetFollow() || pPageDesc->GetFollow() == pPageDesc) )
+        {
+            return false;
+        }
+    }
+
     bool bRet = false;
     // #i68520#
     const SwAnchoredObjList::size_type nCount( bOn ? GetAnchoredObjList()->size() : 0 );
@@ -1010,10 +1028,9 @@ bool SwTextFly::ForEach( const SwRect &rRect, SwRect* pRect, bool bAvoid ) const
 
             SwRect aRect( pAnchoredObj->GetObjRectWithSpaces() );
 
-            // Optimization
-            SwRectFnSet aRectFnSet(m_pCurrFrame);
             if( aRectFnSet.GetLeft(aRect) > aRectFnSet.GetRight(rRect) )
                 break;
+
             // #i68520#
             if ( mpCurrAnchoredObj != pAnchoredObj && aRect.IsOver( rRect ) )
             {