sw/qa/extras/ooxmlexport/data/tdf153128.docx |binary
 sw/qa/extras/ooxmlexport/ooxmlexport18.cxx   |   15 +++++++++++++++
 sw/source/core/text/porlay.cxx               |    8 +++++---
 3 files changed, 20 insertions(+), 3 deletions(-)

New commits:
commit c31267e23603c77e3a3335fa431bb9b74448d5b2
Author:     Mike Kaganski <mike.kagan...@collabora.com>
AuthorDate: Sat Jan 21 08:04:47 2023 +0300
Commit:     Mike Kaganski <mike.kagan...@collabora.com>
CommitDate: Sat Jan 21 11:38:14 2023 +0000

    tdf#153128: do not increase line height, when ignoring whitespace
    
    Since 2006, there is IgnoreTabsAndBlanksForLineCalculation compat flag,
    that handles whitespace-only text portions like in Word, not affecting
    resulting line height.
    
    The implementation, however, did not check if the corrected value is
    no larger than the old one. In the bugdoc, this increased the resulting
    line height.
    
    Change-Id: If855af3e87fd1458d92a36fdbcfa2c681a1075ee
    Reviewed-on: https://gerrit.libreoffice.org/c/core/+/145919
    Tested-by: Jenkins
    Reviewed-by: Mike Kaganski <mike.kagan...@collabora.com>

diff --git a/sw/qa/extras/ooxmlexport/data/tdf153128.docx 
b/sw/qa/extras/ooxmlexport/data/tdf153128.docx
new file mode 100644
index 000000000000..97f08827d956
Binary files /dev/null and b/sw/qa/extras/ooxmlexport/data/tdf153128.docx differ
diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport18.cxx 
b/sw/qa/extras/ooxmlexport/ooxmlexport18.cxx
index 5328c19081fb..e27a1f085b11 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport18.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport18.cxx
@@ -294,6 +294,21 @@ CPPUNIT_TEST_FIXTURE(Test, testTdf153104)
     assertXPath(pXmlNum, numPath + 
"w:lvlOverride[@w:ilvl='1']/w:startOverride", "val", "1");
 }
 
+CPPUNIT_TEST_FIXTURE(Test, testTdf153128)
+{
+    loadAndReload("tdf153128.docx");
+    calcLayout();
+    sal_Int32 nFirstLineHeight
+        = 
parseDump("/root/page/body/txt[1]/SwParaPortion/SwLineLayout/SwParaPortion", 
"height")
+              .toInt32();
+    CPPUNIT_ASSERT_GREATER(sal_Int32(0), nFirstLineHeight);
+
+    // The text height is 1 pt, i.e. 20 twip; without the fix, it would fail 
with
+    // - Expected less than: 30
+    // - Actual  : 414
+    CPPUNIT_ASSERT_LESS(sal_Int32(30), nFirstLineHeight);
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/sw/source/core/text/porlay.cxx b/sw/source/core/text/porlay.cxx
index 8705ac6ecbd1..65f2b4de3bae 100644
--- a/sw/source/core/text/porlay.cxx
+++ b/sw/source/core/text/porlay.cxx
@@ -653,14 +653,16 @@ void SwLineLayout::CalcLine( SwTextFormatter &rLine, 
SwTextFormatInfo &rInf )
         }
     }
 
-    // #i3952#
+    // #i3952# Whitespace does not increase line height
     if ( bHasBlankPortion && bHasOnlyBlankPortions )
     {
         sal_uInt16 nTmpAscent = GetAscent();
         sal_uInt16 nTmpHeight = Height();
         rLine.GetAttrHandler().GetDefaultAscentAndHeight( rInf.GetVsh(), 
*rInf.GetOut(), nTmpAscent, nTmpHeight );
-        SetAscent( nTmpAscent );
-        Height( nTmpHeight, false );
+        if (nTmpAscent < GetAscent() || GetAscent() <= 0)
+            SetAscent(nTmpAscent);
+        if (nTmpHeight < Height() || Height() <= 0)
+            Height(nTmpHeight, false);
     }
 
     // Robust:

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