tdf#118058 sw, sections in tables: no split for multiple columns

The original use-case was "group a few paragraphs together" for the
split sections inside tables, i.e. it's safe to not split when the
section has multiple columns.

And the multiple columns case would mean that we don't find where to put
the follow section inside a table, resulting in a layout loop.

Reviewed-on: https://gerrit.libreoffice.org/58951
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
(cherry picked from commit d2d996db4806e84ae0bf6aef1c285b498f2d2867)

Conflicts:
	sw/qa/extras/layout/layout.cxx

Change-Id: Ifab220e582439d2e757b5645f3167b55a051a379
Reviewed-on: https://gerrit.libreoffice.org/59686
Tested-by: Jenkins
Reviewed-by: Andras Timar <andras.timar@collabora.com>

3 files changed, 61 insertions, 1 deletions

diff --git a/sw/qa/extras/layout/data/tdf118058.fodt b/sw/qa/extras/layout/data/tdf118058.fodt
new file mode 100644
index 000000000000..dbdf26bf519f
--- /dev/null
+++ b/sw/qa/extras/layout/data/tdf118058.fodt
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" office:version="1.2" office:mimetype="application/vnd.oasis.opendocument.text">
+  <office:styles>
+    <style:default-style style:family="paragraph">
+      <style:paragraph-properties fo:orphans="2" fo:widows="2" fo:hyphenation-ladder-count="no-limit" style:text-autospace="ideograph-alpha" style:punctuation-wrap="hanging"/>
+    </style:default-style>
+  </office:styles>
+  <office:automatic-styles>
+    <style:style style:name="Checklist" style:family="table">
+      <style:table-properties style:width="12.338cm" table:align="margins"/>
+    </style:style>
+    <style:style style:name="Checklist.A" style:family="table-column">
+      <style:table-column-properties style:column-width="12.338cm" style:rel-column-width="65535*"/>
+    </style:style>
+    <style:style style:name="Checklist.1" style:family="table-row">
+      <style:table-row-properties fo:background-color="#ffff00">
+        <style:background-image/>
+      </style:table-row-properties>
+    </style:style>
+    <style:style style:name="Checklist.A1" style:family="table-cell">
+      <style:table-cell-properties fo:padding-left="0.25cm" fo:padding-right="0.101cm" fo:padding-top="0.101cm" fo:padding-bottom="0.101cm" fo:border="0.05pt solid #000000"/>
+    </style:style>
+    <style:style style:name="Sect1" style:family="section">
+      <style:section-properties text:dont-balance-text-columns="false" style:editable="false">
+        <style:columns fo:column-count="2" fo:column-gap="0.497cm">
+          <style:column style:rel-width="32767*" fo:start-indent="0cm" fo:end-indent="0.249cm"/>
+          <style:column style:rel-width="32768*" fo:start-indent="0.249cm" fo:end-indent="0cm"/>
+        </style:columns>
+      </style:section-properties>
+    </style:style>
+  </office:automatic-styles>
+  <office:body>
+    <office:text text:use-soft-page-breaks="true">
+      <text:p text:style-name="P5"><draw:frame draw:style-name="fr1" draw:name="Rámec2" text:anchor-type="paragraph" svg:x="-0.039cm" svg:y="1.914cm" svg:width="12.338cm" svg:height="15.399cm" draw:z-index="0"><draw:text-box><table:table table:name="Checklist" table:style-name="Checklist"><table:table-column table:style-name="Checklist.A"/><table:table-row table:style-name="Checklist.1"><table:table-cell table:style-name="Checklist.A1" office:value-type="string"><text:p text:style-name="Table_20_header"/></table:table-cell></table:table-row><table:table-row table:style-name="Checklist.1"><table:table-cell table:style-name="Checklist.A1" office:value-type="string"><text:p text:style-name="P3"/></table:table-cell></table:table-row><table:table-row table:style-name="Checklist.1"><table:table-cell table:style-name="Checklist.A1" office:value-type="string"><text:p text:style-name="Table_20_header"/></table:table-cell></table:table-row><table:table-row><table:table-cell table:style-name="Checklist.A1" office:value-type="string"><text:section text:style-name="Sect1" text:name="Oblasť1"><text:p text:style-name="P4">Para 1.</text:p><text:p text:style-name="P2">No. However, you will not be able to see the colours produced on a black-and-white set.</text:p></text:section></table:table-cell></table:table-row></table:table><text:p text:style-name="P1"/></draw:text-box></draw:frame></text:p>
+    </office:text>
+  </office:body>
+</office:document>
diff --git a/sw/qa/extras/layout/layout.cxx b/sw/qa/extras/layout/layout.cxx
index 9a73e2025147..d7a25e95886c 100644
--- a/sw/qa/extras/layout/layout.cxx
+++ b/sw/qa/extras/layout/layout.cxx
@@ -19,11 +19,13 @@ public:
     void testTdf116830();
     void testTdf116925();
     void testTdf117028();
+    void testTdf118058();
 
     CPPUNIT_TEST_SUITE(SwLayoutWriter);
     CPPUNIT_TEST(testTdf116830);
     CPPUNIT_TEST(testTdf116925);
     CPPUNIT_TEST(testTdf117028);
+    CPPUNIT_TEST(testTdf118058);
     CPPUNIT_TEST_SUITE_END();
 
 private:
@@ -108,6 +110,13 @@ void SwLayoutWriter::testTdf117028()
     assertXPathContent(pXmlDoc, "//textarray/text", "Hello");
 }
 
+void SwLayoutWriter::testTdf118058()
+{
+    SwDoc* pDoc = createDoc("tdf118058.fodt");
+    // This resulted in a layout loop.
+    pDoc->getIDocumentLayoutAccess().GetCurrentViewShell()->CalcLayout();
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(SwLayoutWriter);
 CPPUNIT_PLUGIN_IMPLEMENT();
 
diff --git a/sw/source/core/layout/sectfrm.cxx b/sw/source/core/layout/sectfrm.cxx
index 1030d9ecb0e2..3790c92a199d 100644
--- a/sw/source/core/layout/sectfrm.cxx
+++ b/sw/source/core/layout/sectfrm.cxx
@@ -617,7 +617,21 @@ namespace
             return true;
 
         // The frame is in a table, see if the table is in a section.
-        return !pFrame->FindTabFrame()->IsInSct();
+        bool bRet = !pFrame->FindTabFrame()->IsInSct();
+
+        if (bRet)
+        {
+            // Don't try to split if the frame itself is a section frame with
+            // multiple columns.
+            if (pFrame->IsSctFrame())
+            {
+                const SwFrame* pLower = pFrame->GetLower();
+                if (pLower && pLower->IsColumnFrame())
+                    bRet = false;
+            }
+        }
+
+        return bRet;
     }
 }