tdf#117028 sw: conditionally consider fill of shape for in-textbox auto color

Commit f966767e1ccfa432da33e1a0fd6de69e17a36bc3 (tdf#116925 sw: consider
fill styles of shape for in-textbox auto color, 2018-04-10) did this
unconditionally, but there are two cases:

1) Shape (with textbox) has a fill, in that case auto text color of
textbox should consider the shape fill.

2) Shape has no fill, in that case the shape fill should not be
considered when counting the background of a transparent fly frame.

Fix 2) without breaking 1) by making the change to
SwFrame::GetBackgroundBrush() opt-in, and only use it for auto font
color, not in other cases.

Change-Id: I761a1b7d6ecf47586edbe5641ec012f22f6a53d7
Reviewed-on: https://gerrit.libreoffice.org/52941
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

2 files changed, 24 insertions, 0 deletions

diff --git a/sw/qa/extras/layout/data/tdf117028.docx b/sw/qa/extras/layout/data/tdf117028.docx
new file mode 100644
index 000000000000..877264b4db33
--- /dev/null
+++ b/sw/qa/extras/layout/data/tdf117028.docx
diff --git a/sw/qa/extras/layout/layout.cxx b/sw/qa/extras/layout/layout.cxx
index 3709e306f53d..9a73e2025147 100644
--- a/sw/qa/extras/layout/layout.cxx
+++ b/sw/qa/extras/layout/layout.cxx
@@ -18,10 +18,12 @@ class SwLayoutWriter : public SwModelTestBase
 public:
     void testTdf116830();
     void testTdf116925();
+    void testTdf117028();
 
     CPPUNIT_TEST_SUITE(SwLayoutWriter);
     CPPUNIT_TEST(testTdf116830);
     CPPUNIT_TEST(testTdf116925);
+    CPPUNIT_TEST(testTdf117028);
     CPPUNIT_TEST_SUITE_END();
 
 private:
@@ -84,6 +86,28 @@ void SwLayoutWriter::testTdf116925()
         "/metafile/push[1]/push[1]/push[1]/push[4]/push[1]/push[3]/textcolor[@color='#ffffff']", 1);
 }
 
+void SwLayoutWriter::testTdf117028()
+{
+    SwDoc* pDoc = createDoc("tdf117028.docx");
+    SwDocShell* pShell = pDoc->GetDocShell();
+
+    // Dump the rendering of the first page as an XML file.
+    std::shared_ptr<GDIMetaFile> xMetaFile = pShell->GetPreviewMetaFile();
+    MetafileXmlDump dumper;
+    xmlDocPtr pXmlDoc = dumper.dumpAndParse(*xMetaFile);
+    CPPUNIT_ASSERT(pXmlDoc);
+
+    // The only polypolygon in the rendering result was the white background we
+    // want to avoid.
+    xmlXPathObjectPtr pXmlObj = getXPathNode(pXmlDoc, "//polypolygon");
+    xmlNodeSetPtr pXmlNodes = pXmlObj->nodesetval;
+    CPPUNIT_ASSERT_EQUAL(0, xmlXPathNodeSetGetLength(pXmlNodes));
+    xmlXPathFreeObject(pXmlObj);
+
+    // Make sure the text is still rendered.
+    assertXPathContent(pXmlDoc, "//textarray/text", "Hello");
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(SwLayoutWriter);
 CPPUNIT_PLUGIN_IMPLEMENT();