tdf#136453 sw_redlinehide: SwUndoDelete: only create extra frames...

... at the start if the section nodes were at the start.

m_bBackSp and m_bJoinNext can't both be true.

(regression from 740f1796504f66408b692225a9676c9ee3d63722)

Change-Id: I999ed3809ca8f527bc3e754b229df02da4576825
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104891
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@cib.de>
(cherry picked from commit c4967928475f2be20ac2d79e3fa84ac435a7e560)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104920
Tested-by: Michael Stahl <michael.stahl@cib.de>
(cherry picked from commit 0e0c7616bace9f64079fe9c19c06aca823815666)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/106529
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Andras Timar <andras.timar@collabora.com>

3 files changed, 119 insertions, 1 deletions

diff --git a/sw/qa/extras/uiwriter/data/tdf136453.fodt b/sw/qa/extras/uiwriter/data/tdf136453.fodt
new file mode 100644
index 000000000000..2234957e1db8
--- /dev/null
+++ b/sw/qa/extras/uiwriter/data/tdf136453.fodt
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<office:document xmlns:css3t="http://www.w3.org/TR/css3-text/" xmlns:chart="urn:oasis:names:tc:opendocument:xmlns:chart:1.0" xmlns:svg="urn:oasis:names:tc:opendocument:xmlns:svg-compatible:1.0" xmlns:text="urn:oasis:names:tc:opendocument:xmlns:text:1.0" xmlns:oooc="http://openoffice.org/2004/calc" xmlns:style="urn:oasis:names:tc:opendocument:xmlns:style:1.0" xmlns:ooow="http://openoffice.org/2004/writer" xmlns:meta="urn:oasis:names:tc:opendocument:xmlns:meta:1.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rpt="http://openoffice.org/2005/report" xmlns:draw="urn:oasis:names:tc:opendocument:xmlns:drawing:1.0" xmlns:config="urn:oasis:names:tc:opendocument:xmlns:config:1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fo="urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0" xmlns:ooo="http://openoffice.org/2004/office" xmlns:office="urn:oasis:names:tc:opendocument:xmlns:office:1.0" xmlns:formx="urn:openoffice:names:experimental:ooxml-odf-interop:xmlns:form:1.0" xmlns:dr3d="urn:oasis:names:tc:opendocument:xmlns:dr3d:1.0" xmlns:table="urn:oasis:names:tc:opendocument:xmlns:table:1.0" xmlns:number="urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0" xmlns:of="urn:oasis:names:tc:opendocument:xmlns:of:1.2" xmlns:math="http://www.w3.org/1998/Math/MathML" xmlns:form="urn:oasis:names:tc:opendocument:xmlns:form:1.0" xmlns:script="urn:oasis:names:tc:opendocument:xmlns:script:1.0" xmlns:dom="http://www.w3.org/2001/xml-events" xmlns:xforms="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:grddl="http://www.w3.org/2003/g/data-view#" office:version="1.3" office:mimetype="application/vnd.oasis.opendocument.text">
+ <office:font-face-decls>
+  <style:font-face style:name="Liberation Serif" svg:font-family="&apos;Liberation Serif&apos;" style:font-family-generic="roman" style:font-pitch="variable"/>
+  <style:font-face style:name="Lohit Devanagari" svg:font-family="&apos;Lohit Devanagari&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+  <style:font-face style:name="Source Han Serif CN" svg:font-family="&apos;Source Han Serif CN&apos;" style:font-family-generic="system" style:font-pitch="variable"/>
+ </office:font-face-decls>
+ <office:styles>
+  <style:default-style style:family="graphic">
+   <style:graphic-properties svg:stroke-color="#3465a4" draw:fill-color="#729fcf" fo:wrap-option="no-wrap" draw:shadow-offset-x="0.3cm" draw:shadow-offset-y="0.3cm" draw:start-line-spacing-horizontal="0.283cm" draw:start-line-spacing-vertical="0.283cm" draw:end-line-spacing-horizontal="0.283cm" draw:end-line-spacing-vertical="0.283cm" style:flow-with-text="false"/>
+   <style:paragraph-properties style:text-autospace="ideograph-alpha" style:line-break="strict" style:writing-mode="lr-tb" style:font-independent-line-spacing="false">
+    <style:tab-stops/>
+   </style:paragraph-properties>
+   <style:text-properties style:use-window-font-color="true" loext:opacity="0%" style:font-name="Liberation Serif" fo:font-size="12pt" fo:language="de" fo:country="DE" style:letter-kerning="true" style:font-name-asian="Source Han Serif CN" style:font-size-asian="10.5pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Lohit Devanagari" style:font-size-complex="12pt" style:language-complex="hi" style:country-complex="IN"/>
+  </style:default-style>
+  <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:line-break="strict" style:tab-stop-distance="1.251cm" style:writing-mode="page"/>
+   <style:text-properties style:use-window-font-color="true" loext:opacity="0%" style:font-name="Liberation Serif" fo:font-size="12pt" fo:language="de" fo:country="DE" style:letter-kerning="true" style:font-name-asian="Source Han Serif CN" style:font-size-asian="10.5pt" style:language-asian="zh" style:country-asian="CN" style:font-name-complex="Lohit Devanagari" style:font-size-complex="12pt" style:language-complex="hi" style:country-complex="IN" fo:hyphenate="false" fo:hyphenation-remain-char-count="2" fo:hyphenation-push-char-count="2" loext:hyphenation-no-caps="false"/>
+  </style:default-style>
+  <style:default-style style:family="table">
+   <style:table-properties table:border-model="collapsing"/>
+  </style:default-style>
+  <style:default-style style:family="table-row">
+   <style:table-row-properties fo:keep-together="auto"/>
+  </style:default-style>
+  <style:style style:name="Standard" style:family="paragraph" style:class="text"/>
+  <text:notes-configuration text:note-class="footnote" style:num-format="1" text:start-value="0" text:footnotes-position="page" text:start-numbering-at="document"/>
+  <text:notes-configuration text:note-class="endnote" style:num-format="i" text:start-value="0"/>
+  <text:linenumbering-configuration text:number-lines="false" text:offset="0.499cm" style:num-format="1" text:number-position="left" text:increment="5"/>
+ </office:styles>
+ <office:automatic-styles>
+  <style:style style:name="Sect1" style:family="section">
+   <style:section-properties fo:background-color="#81d41a" style:editable="false">
+    <style:columns fo:column-count="1" fo:column-gap="0cm"/>
+    <style:background-image/>
+   </style:section-properties>
+  </style:style>
+  <style:page-layout style:name="pm1">
+   <style:page-layout-properties fo:page-width="21.001cm" fo:page-height="29.7cm" style:num-format="1" style:print-orientation="portrait" fo:margin-top="2cm" fo:margin-bottom="2cm" fo:margin-left="2cm" fo:margin-right="2cm" style:writing-mode="lr-tb" style:layout-grid-color="#c0c0c0" style:layout-grid-lines="20" style:layout-grid-base-height="0.706cm" style:layout-grid-ruby-height="0.353cm" style:layout-grid-mode="none" style:layout-grid-ruby-below="false" style:layout-grid-print="false" style:layout-grid-display="false" style:footnote-max-height="0cm">
+    <style:footnote-sep style:width="0.018cm" style:distance-before-sep="0.101cm" style:distance-after-sep="0.101cm" style:line-style="solid" style:adjustment="left" style:rel-width="25%" style:color="#000000"/>
+   </style:page-layout-properties>
+   <style:header-style/>
+   <style:footer-style/>
+  </style:page-layout>
+ </office:automatic-styles>
+ <office:master-styles>
+  <style:master-page style:name="Standard" style:page-layout-name="pm1"/>
+ </office:master-styles>
+ <office:body>
+  <office:text>
+   <text:sequence-decls>
+    <text:sequence-decl text:display-outline-level="0" text:name="Illustration"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Table"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Text"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Drawing"/>
+    <text:sequence-decl text:display-outline-level="0" text:name="Figure"/>
+   </text:sequence-decls>
+   <text:p text:style-name="Standard"/>
+   <text:p text:style-name="Standard">foo</text:p>
+   <text:p text:style-name="Standard">bar</text:p>
+   <text:section text:style-name="Sect1" text:name="Section1">
+    <text:p text:style-name="Standard">baz</text:p>
+   </text:section>
+  </office:text>
+ </office:body>
+</office:document>
diff --git a/sw/qa/extras/uiwriter/uiwriter.cxx b/sw/qa/extras/uiwriter/uiwriter.cxx
index f2e88e03b3c5..bdac0ce90ebf 100644
--- a/sw/qa/extras/uiwriter/uiwriter.cxx
+++ b/sw/qa/extras/uiwriter/uiwriter.cxx
@@ -1135,6 +1135,57 @@ void SwUiWriterTest::testWatermarkDOCX()
     CPPUNIT_ASSERT_EQUAL(sal_Int16(50), pWatermark->GetTransparency());
 }
 
+CPPUNIT_TEST_FIXTURE(SwUiWriterTest, testTdf136453)
+{
+    load(DATA_DIRECTORY, "tdf136453.fodt");
+
+    SwXTextDocument *const pTextDoc(dynamic_cast<SwXTextDocument*>(mxComponent.get()));
+    CPPUNIT_ASSERT(pTextDoc);
+    SwDoc* const pDoc(pTextDoc->GetDocShell()->GetDoc());
+    SwWrtShell *const pWrtShell(pDoc->GetDocShell()->GetWrtShell());
+
+    sal_uLong const nNodes(pDoc->GetNodes().Count());
+
+    pWrtShell->SttEndDoc(false);
+    pWrtShell->SetMark();
+    pWrtShell->Up(true, 1);
+    pWrtShell->SttPara(true);
+    pWrtShell->Delete();
+
+    // one paragraph deleted, section is gone
+    CPPUNIT_ASSERT_EQUAL(nNodes - 3, pDoc->GetNodes().Count());
+
+    pWrtShell->Undo();
+
+    CPPUNIT_ASSERT_EQUAL(nNodes, pDoc->GetNodes().Count());
+
+    // check that every node has 1 frame
+    xmlDocPtr pXmlDoc = parseLayoutDump();
+    assertXPath(pXmlDoc, "/root/page[1]/body/txt", 3);
+    assertXPath(pXmlDoc, "/root/page[1]/body/section", 1);
+    assertXPath(pXmlDoc, "/root/page[1]/body/section/txt", 1);
+
+    pWrtShell->Redo();
+
+    // one paragraph deleted, section is gone
+    CPPUNIT_ASSERT_EQUAL(nNodes - 3, pDoc->GetNodes().Count());
+
+    discardDumpedLayout();
+    pXmlDoc = parseLayoutDump();
+    assertXPath(pXmlDoc, "/root/page[1]/body/txt", 3);
+    assertXPath(pXmlDoc, "/root/page[1]/body/section", 0);
+
+    pWrtShell->Undo();
+
+    CPPUNIT_ASSERT_EQUAL(nNodes, pDoc->GetNodes().Count());
+
+    discardDumpedLayout();
+    pXmlDoc = parseLayoutDump();
+    assertXPath(pXmlDoc, "/root/page[1]/body/txt", 3);
+    assertXPath(pXmlDoc, "/root/page[1]/body/section", 1);
+    assertXPath(pXmlDoc, "/root/page[1]/body/section/txt", 1);
+}
+
 void SwUiWriterTest::testWatermarkPosition()
 {
     // tdf#108494 Watermark inserted in the document with page break was outside the first page
diff --git a/sw/source/core/undo/undel.cxx b/sw/source/core/undo/undel.cxx
index 5cf415feab3a..4e55a46196b4 100644
--- a/sw/source/core/undo/undel.cxx
+++ b/sw/source/core/undo/undel.cxx
@@ -1115,7 +1115,8 @@ void SwUndoDelete::UndoImpl(::sw::UndoRedoContext & rContext)
     // create frames after SetSaveData has recreated redlines
     if (0 != m_nNode)
     {
-        if (m_nReplaceDummy != 0)
+        // tdf#136453 only if section nodes at the start
+        if (m_bBackSp && m_nReplaceDummy != 0)
         {
             // tdf#134252 *first* create outer section frames
             // note: text node m_nSttNode currently has frame with an upper;