tdf#116179 Support reading "auto" colour from docx

In docx a colour value is represented as a 6-digit hex RGB value, or
alternatively the word "auto" to represent automatic colour.

- Add support for reading the value "auto" as COL_AUTO.  Previously
this would be read as if it were a hex value, stopping at the
letter 'u' which is not a valid hex digit, resulting in the colour
0x00000A - a very dark blue, which looks close enough to black that
it went unnoticed for a long time :-)

- Remove code which tried to handle this wrong 0x00000A value,
including the constant OOXML_COLOR_AUTO, as it is no longer needed
and will cause surprises for anyone who really wanted this exact
shade of dark blue

- Fix unit tests that were checking for 0x00000A

Reviewed-on: https://gerrit.libreoffice.org/50995
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Reviewed-on: https://gerrit.libreoffice.org/51461
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
(cherry picked from commit 3967aebca94be9ceea3e36b43f7f53589473ad4e)

Change-Id: I6000070341931147ff9341ad6281cd3b53c02b46

4 files changed, 21 insertions, 10 deletions

diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport.cxx
index a767a6e5955a..0c2a84620139 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport.cxx
@@ -694,7 +694,7 @@ DECLARE_OOXMLEXPORT_TEST(testNumOverrideLvltext, "num-override-lvltext.docx")
     CPPUNIT_ASSERT_EQUAL(sal_Int16(2), comphelper::SequenceAsHashMap(xRules->getByIndex(1))["ParentNumbering"].get<sal_Int16>());
 
     // The paragraph marker's red font color was inherited by the number portion, this was ff0000.
-    CPPUNIT_ASSERT_EQUAL(OUString("00000a"), parseDump("//Special[@nType='POR_NUMBER']/SwFont", "color"));
+    CPPUNIT_ASSERT_EQUAL(OUString("ffffffff"), parseDump("//Special[@nType='POR_NUMBER']/SwFont", "color"));
 }
 
 DECLARE_OOXMLEXPORT_TEST(testNumOverrideStart, "num-override-start.docx")
diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx
index 0796a20f2502..fb5fcfba122d 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport5.cxx
@@ -654,43 +654,43 @@ DECLARE_OOXMLEXPORT_TEST(testfdo80097, "fdo80097.docx")
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:top[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:top[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:top[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:top[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:top[@w:color = 'auto']", 1);
 
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:bottom[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:bottom[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:bottom[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:bottom[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:bottom[@w:color = 'auto']", 1);
 
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideH[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideH[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideH[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideH[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideH[@w:color = 'auto']", 1);
 
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideV[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideV[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideV[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideV[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tblPr/w:tblBorders/w:insideV[@w:color = 'auto']", 1);
 
     //Table Cell Borders
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:top[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:top[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:top[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:top[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:top[@w:color = 'auto']", 1);
 
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:bottom[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:bottom[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:bottom[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:bottom[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:bottom[@w:color = 'auto']", 1);
 
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideH[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideH[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideH[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideH[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideH[@w:color = 'auto']", 1);
 
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideV[@w:val = 'single']",1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideV[@w:sz = 4]", 1);
     assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideV[@w:space = 0]", 1);
-    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideV[@w:color = '00000A']", 1);
+    assertXPath(pXmlDocument, "/w:document/w:body/w:tbl/w:tr[1]/w:tc[1]/w:tbl/w:tr[1]/w:tc[1]/w:tcPr/w:tcBorders/w:insideV[@w:color = 'auto']", 1);
 }
 
 DECLARE_OOXMLEXPORT_TEST(testFdo77129, "fdo77129.docx")
diff --git a/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx b/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx
index fba031390ecc..ddcce371d885 100644
--- a/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx
+++ b/sw/qa/extras/ooxmlexport/ooxmlexport9.cxx
@@ -394,6 +394,16 @@ DECLARE_OOXMLEXPORT_TEST(testUnbalancedColumns, "unbalanced-columns.docx")
     CPPUNIT_ASSERT_EQUAL(true, getProperty<bool>(xTextSections->getByIndex(2), "DontBalanceTextColumns"));
 }
 
+DECLARE_OOXMLEXPORT_TEST(testTdf107035, "tdf107035.docx")
+{
+    // Select the second run containing the page number field
+    auto xPgNumRun = getRun(getParagraph(1), 2, "1");
+
+    // Check that the page number field colour is set to "automatic".
+    sal_Int32 nPgNumColour = getProperty<sal_Int32>(xPgNumRun, "CharColor");
+    CPPUNIT_ASSERT_EQUAL(sal_Int32(COL_AUTO), nPgNumColour);
+}
+
 DECLARE_OOXMLEXPORT_TEST(testTdf107889, "tdf107889.docx")
 {
     uno::Reference<drawing::XDrawPageSupplier> xDrawPageSupplier(mxComponent, uno::UNO_QUERY);
diff --git a/sw/source/core/text/xmldump.cxx b/sw/source/core/text/xmldump.cxx
index 7161ac719b78..10eeca1af78a 100644
--- a/sw/source/core/text/xmldump.cxx
+++ b/sw/source/core/text/xmldump.cxx
@@ -443,7 +443,8 @@ void SwFont::dumpAsXml(xmlTextWriterPtr writer) const
 {
     xmlTextWriterStartElement(writer, BAD_CAST("SwFont"));
     xmlTextWriterWriteFormatAttribute(writer, BAD_CAST("ptr"), "%p", this);
-    xmlTextWriterWriteFormatAttribute(writer, BAD_CAST("color"), "%s", GetColor().AsRGBHexString().toUtf8().getStr());
+    // do not use Color::AsRGBHexString() as that omits the transparency
+    xmlTextWriterWriteFormatAttribute(writer, BAD_CAST("color"), "%08x", GetColor().GetColor());
     xmlTextWriterEndElement(writer);
 }