tdf#48041 Chart: do not duplicate major value

axis labels and vertical axis lines. If the same
value labels follow each other, because of
the number format, only display them once.

Change-Id: I3c5577a0e86c475cb2fafb62d63f991cef7229d8
Reviewed-on: https://gerrit.libreoffice.org/73200
Tested-by: Jenkins
Reviewed-by: László Németh <nemeth@numbertext.org>

chart2/qa/extras/chart2import.cxx

@@ -118,6 +118,8 @@ public:
 
     void testTdf116163();
 
+    void testTdf48041();
+
     void testTdf121205();
 
     void testTdf114179();
@@ -199,6 +201,8 @@ public:
 
     CPPUNIT_TEST(testTdf116163);
 
+    CPPUNIT_TEST(testTdf48041);
+
     CPPUNIT_TEST(testTdf121205);
 
     CPPUNIT_TEST(testTdf114179);
@@ -1746,6 +1750,57 @@ void Chart2ImportTest::testTdf116163()
     CPPUNIT_ASSERT_EQUAL(OUString("Dddd..."), xLabel3->getString());
 }
 
+void Chart2ImportTest::testTdf48041()
+{
+    load("/chart2/qa/extras/data/pptx/", "tdf48041.pptx");
+
+    Reference<chart2::XChartDocument> xChartDoc(getChartDocFromDrawImpress(0, 0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xChartDoc.is());
+
+    Reference<chart2::XAxis> xYAxis = getAxisFromDoc(xChartDoc, 0, 1, 0);
+    CPPUNIT_ASSERT(xYAxis.is());
+
+    chart2::ScaleData aScaleData = xYAxis->getScaleData();
+    CPPUNIT_ASSERT(aScaleData.Scaling.is());
+
+    // Check visible text
+    uno::Reference<drawing::XDrawPageSupplier> xDrawPageSupplier(xChartDoc, uno::UNO_QUERY);
+    uno::Reference<drawing::XDrawPage> xDrawPage = xDrawPageSupplier->getDrawPage();
+    uno::Reference<drawing::XShapes> xShapes(xDrawPage->getByIndex(0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT(xShapes.is());
+
+    const OUString sYAxisName = "CID/D=0:CS=0:Axis=1,0"; // Y Axis
+    uno::Reference<drawing::XShape> xYAxisShape = getShapeByName(xShapes, sYAxisName,
+        // Axis occurs twice in chart xshape representation so need to get the one related to labels
+        [](const uno::Reference<drawing::XShape>& rXShape) -> bool
+    {
+        uno::Reference<drawing::XShapes> xAxisShapes(rXShape, uno::UNO_QUERY);
+        CPPUNIT_ASSERT(xAxisShapes.is());
+        uno::Reference<drawing::XShape> xChildShape(xAxisShapes->getByIndex(0), uno::UNO_QUERY);
+        uno::Reference< drawing::XShapeDescriptor > xShapeDescriptor(xChildShape, uno::UNO_QUERY_THROW);
+        return (xShapeDescriptor->getShapeType() == "com.sun.star.drawing.TextShape");
+    });
+    CPPUNIT_ASSERT(xYAxisShape.is());
+
+    // Check label count
+    uno::Reference<container::XIndexAccess> xIndexAccess(xYAxisShape, UNO_QUERY_THROW);
+    CPPUNIT_ASSERT_EQUAL(static_cast<sal_Int32>(6), xIndexAccess->getCount());
+
+    // Check text
+    uno::Reference<text::XTextRange> xLabel0(xIndexAccess->getByIndex(0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(OUString("0"), xLabel0->getString());
+    uno::Reference<text::XTextRange> xLabel1(xIndexAccess->getByIndex(1), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(OUString("1"), xLabel1->getString());
+    uno::Reference<text::XTextRange> xLabel2(xIndexAccess->getByIndex(2), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(OUString("2"), xLabel2->getString());
+    uno::Reference<text::XTextRange> xLabel3(xIndexAccess->getByIndex(3), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(OUString("3"), xLabel3->getString());
+    uno::Reference<text::XTextRange> xLabel4(xIndexAccess->getByIndex(4), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(OUString("4"), xLabel4->getString());
+    uno::Reference<text::XTextRange> xLabel5(xIndexAccess->getByIndex(5), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_EQUAL(OUString("5"), xLabel5->getString());
+}
+
 void Chart2ImportTest::testTdf121205()
 {
     load("/chart2/qa/extras/data/pptx/", "tdf121205.pptx");

chart2/source/view/axes/VCartesianAxis.cxx

@@ -28,6 +28,7 @@
 #include <AxisHelper.hxx>
 #include "Tickmarks_Equidistant.hxx"
 #include <ExplicitCategoriesProvider.hxx>
+#include <com/sun/star/chart2/AxisType.hpp>
 
 #include <rtl/math.hxx>
 #include <tools/color.hxx>
@@ -1551,11 +1552,35 @@ sal_Int32 VCartesianAxis::estimateMaximumAutoMainIncrementCount()
 
     sal_Int32 nTotalAvailable = nMaxHeight;
     sal_Int32 nSingleNeeded = m_nMaximumTextHeightSoFar;
+    sal_Int32 nMaxSameLabel = 0;
 
     //for horizontal axis:
     if( (m_nDimensionIndex == 0 && !m_aAxisProperties.m_bSwapXAndY)
         || (m_nDimensionIndex == 1 && m_aAxisProperties.m_bSwapXAndY) )
     {
+        if (m_aAxisProperties.m_nAxisType != css::chart2::AxisType::DATE)
+        {
+            // tdf#48041: do not duplicate the value labels because of rounding
+            FixedNumberFormatter aFixedNumberFormatterTest(m_xNumberFormatsSupplier, m_aAxisLabelProperties.nNumberFormatKey);
+            OUString sPreviousValueLabel;
+            sal_Int32 nSameLabel = 0;
+            for (sal_Int32 nLabel = 0; nLabel < static_cast<sal_Int32>(m_aAllTickInfos[0].size()); ++nLabel)
+            {
+                Color nColor = COL_AUTO;
+                bool bHasColor = false;
+                OUString sValueLabel = aFixedNumberFormatterTest.getFormattedString(m_aAllTickInfos[0][nLabel].fScaledTickValue, nColor, bHasColor);
+                if (sValueLabel == sPreviousValueLabel)
+                {
+                    nSameLabel++;
+                    if (nSameLabel > nMaxSameLabel)
+                        nMaxSameLabel = nSameLabel;
+                }
+                else
+                    nSameLabel = 0;
+                sPreviousValueLabel = sValueLabel;
+            }
+        }
+
         nTotalAvailable = nMaxWidth;
         nSingleNeeded = m_nMaximumTextWidthSoFar;
     }
@@ -1563,6 +1588,13 @@ sal_Int32 VCartesianAxis::estimateMaximumAutoMainIncrementCount()
     if( nSingleNeeded>0 )
         nRet = nTotalAvailable/nSingleNeeded;
 
+    if ( nMaxSameLabel > 0 )
+    {
+        sal_Int32 nRetNoSameLabel = m_aAllTickInfos[0].size() / (nMaxSameLabel + 1);
+        if ( nRet > nRetNoSameLabel )
+           nRet = nRetNoSameLabel;
+    }
+
     return nRet;
 }