FDO#74430: File Corruption due to repetition of docPr Id

Issue :
- If there is a scenario where a chart is followed by a shape
(may it be in the footer or on a different page )
which is being exported as an alternate content then, the
docPr Id is being repeated, ECMA 20.4.2.5 says that the
docPr Id should be unique.
- Two different variables were been used as counters for the
docPr Id, hence there were repitions in the docPr Id.

Implementation :
- ensured that a single counter is used to track the docPr Id.

Conflicts:
chart2/qa/extras/chart2export.cxx
Reviewed on:
https://gerrit.libreoffice.org/7916

Change-Id: I1c105be184d045ef058423f03259eb8c634fcbbe

4 files changed, 29 insertions, 3 deletions

diff --git a/chart2/qa/extras/chart2export.cxx b/chart2/qa/extras/chart2export.cxx
index 6288d3d3f74e..c15f5af2f5c1 100644
--- a/chart2/qa/extras/chart2export.cxx
+++ b/chart2/qa/extras/chart2export.cxx
@@ -46,6 +46,7 @@ public:
     void testFdo74115WallGradientFill();
     void testFdo74115WallBitmapFill();
     void testBarChartRotation();
+    void testShapeFollowedByChart();
 
     CPPUNIT_TEST_SUITE(Chart2ExportTest);
     CPPUNIT_TEST(test);
@@ -64,6 +65,7 @@ public:
     // CPPUNIT_TEST(testFdo74115WallGradientFill);
     CPPUNIT_TEST(testFdo74115WallBitmapFill);
     CPPUNIT_TEST(testBarChartRotation);
+    CPPUNIT_TEST(testShapeFollowedByChart);
     CPPUNIT_TEST_SUITE_END();
 
 protected:
@@ -169,6 +171,10 @@ xmlNodeSetPtr Chart2ExportTest::getXPathNode(xmlDocPtr pXmlDoc, const OString& r
     xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("v"), BAD_CAST("urn:schemas-microsoft-com:vml"));
     xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("c"), BAD_CAST("http://schemas.openxmlformats.org/drawingml/2006/chart"));
     xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("a"), BAD_CAST("http://schemas.openxmlformats.org/drawingml/2006/main"));
+    xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("mc"), BAD_CAST("http://schemas.openxmlformats.org/markup-compatibility/2006"));
+    xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("wps"), BAD_CAST("http://schemas.microsoft.com/office/word/2010/wordprocessingShape"));
+    xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("wpg"), BAD_CAST("http://schemas.microsoft.com/office/word/2010/wordprocessingGroup"));
+    xmlXPathRegisterNs(pXmlXpathCtx, BAD_CAST("wp"), BAD_CAST("http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing"));
     xmlXPathObjectPtr pXmlXpathObj = xmlXPathEvalExpression(BAD_CAST(rXPath.getStr()), pXmlXpathCtx);
     return pXmlXpathObj->nodesetval;
 }
@@ -578,6 +584,23 @@ void Chart2ExportTest::testBarChartRotation()
     assertXPath(pXmlDoc, "/c:chartSpace/c:chart/c:view3D/c:rotY", "val", "50");
 }
 
+void Chart2ExportTest::testShapeFollowedByChart()
+{
+    /* If there is a scenario where a chart is followed by a shape
+       which is being exported as an alternate content then, the
+       docPr Id is being repeated, ECMA 20.4.2.5 says that the
+       docPr Id should be unique, ensuring the same here.
+    */
+    load("/chart2/qa/extras/data/docx/", "FDO74430.docx");
+    xmlDocPtr pXmlDoc = parseExport("word/document", "Office Open XML Text" );
+    CPPUNIT_ASSERT(pXmlDoc);
+
+    OUString aValueOfFirstDocPR = getXPath(pXmlDoc, "/w:document/w:body/w:p[3]/w:r[1]/w:drawing[1]/wp:inline[1]/wp:docPr[1]", "id");
+    OUString aValueOfSecondDocPR = getXPath(pXmlDoc, "/w:document/w:body/w:p[3]/w:r[2]/mc:AlternateContent[1]/mc:Choice[1]/w:drawing[1]/wp:anchor[1]/wp:docPr[1]", "id");
+    CPPUNIT_ASSERT( aValueOfFirstDocPR != aValueOfSecondDocPR );
+
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(Chart2ExportTest);
 
 CPPUNIT_PLUGIN_IMPLEMENT();
diff --git a/chart2/qa/extras/data/docx/FDO74430.docx b/chart2/qa/extras/data/docx/FDO74430.docx
new file mode 100644
index 000000000000..f4a68b519db2
--- /dev/null
+++ b/chart2/qa/extras/data/docx/FDO74430.docx
diff --git a/sw/source/filter/ww8/docxattributeoutput.cxx b/sw/source/filter/ww8/docxattributeoutput.cxx
index 78b01dcbd8d1..1467692bac2a 100644
--- a/sw/source/filter/ww8/docxattributeoutput.cxx
+++ b/sw/source/filter/ww8/docxattributeoutput.cxx
@@ -3211,8 +3211,13 @@ void DocxAttributeOutput::WritePostponedChart()
         if( xNamed.is() )
             sName = xNamed->getName();
 
+        /* If there is a scenario where a chart is followed by a shape
+           which is being exported as an alternate content then, the
+           docPr Id is being repeated, ECMA 20.4.2.5 says that the
+           docPr Id should be unique, ensuring the same here.
+        */
         m_pSerializer->singleElementNS( XML_wp, XML_docPr,
-            XML_id, I32S( ++m_docPrID ),
+            XML_id, I32S( m_anchorId++ ),
             XML_name, USS( sName ),
             FSEND );
 
@@ -6281,7 +6286,6 @@ DocxAttributeOutput::DocxAttributeOutput( DocxExport &rExport, FSHelperPtr pSeri
       m_pFootnotesList( new ::docx::FootnotesList() ),
       m_pEndnotesList( new ::docx::FootnotesList() ),
       m_footnoteEndnoteRefTag( 0 ),
-      m_docPrID(0),
       m_pSectionInfo( NULL ),
       m_pRedlineData( NULL ),
       m_nRedlineId( 0 ),
diff --git a/sw/source/filter/ww8/docxattributeoutput.hxx b/sw/source/filter/ww8/docxattributeoutput.hxx
index c7965c8f6ca4..8d167c0dc92a 100644
--- a/sw/source/filter/ww8/docxattributeoutput.hxx
+++ b/sw/source/filter/ww8/docxattributeoutput.hxx
@@ -691,7 +691,6 @@ private:
     ::docx::FootnotesList *m_pFootnotesList;
     ::docx::FootnotesList *m_pEndnotesList;
     int m_footnoteEndnoteRefTag;
-    int m_docPrID;
     boost::scoped_ptr< const WW8_SepInfo > m_pSectionInfo;
 
     /// Redline data to remember in the text run.