Improve ODF enhanced-path command moveTo to follow spec

ODF 1.2 section 19.145 says 'If a moveto is followed by multiple
pairs of coordinates, they are treated as lineto.' The patch does
this on import.

Change-Id: Ib493ca49288cdb2d34b7ee801bd052281617d2e8
Reviewed-on: https://gerrit.libreoffice.org/66888
Tested-by: Jenkins
Reviewed-by: Regina Henschel <rb.henschel@t-online.de>

svx/qa/unit/customshapes.cxx

@@ -50,11 +50,13 @@ public:
     void testViewBoxLeftTop();
     void testAccuracyCommandX();
     void testToggleCommandXY();
+    void testMultipleMoveTo();
 
     CPPUNIT_TEST_SUITE(CustomshapesTest);
     CPPUNIT_TEST(testViewBoxLeftTop);
     CPPUNIT_TEST(testAccuracyCommandX);
     CPPUNIT_TEST(testToggleCommandXY);
+    CPPUNIT_TEST(testMultipleMoveTo);
     CPPUNIT_TEST_SUITE_END();
 };
 
@@ -161,6 +163,33 @@ void CustomshapesTest::testToggleCommandXY()
     CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE("segment height out of tolerance", 5871.0, fHeight, 16.0);
 }
 
+void CustomshapesTest::testMultipleMoveTo()
+{
+    // tdf122964 Multiple moveTo has to be treated as lineTo in draw:enhanced-path
+    // Load a document with path "M 0 0 5 10 10 0 N"
+    OUString aURL = m_directories.getURLFromSrc(sDataDirectory) + "tdf122964_MultipleMoveTo.odg";
+    mxComponent = loadFromDesktop(aURL, "com.sun.star.comp.drawing.DrawingDocument");
+    CPPUNIT_ASSERT_MESSAGE("Could not load document", mxComponent.is());
+
+    uno::Reference<drawing::XDrawPagesSupplier> xDrawPagesSupplier(mxComponent,
+                                                                   uno::UNO_QUERY_THROW);
+    CPPUNIT_ASSERT_MESSAGE("Could not get XDrawPagesSupplier", xDrawPagesSupplier.is());
+    uno::Reference<drawing::XDrawPages> xDrawPages(xDrawPagesSupplier->getDrawPages());
+    uno::Reference<drawing::XDrawPage> xDrawPage(xDrawPages->getByIndex(0), uno::UNO_QUERY_THROW);
+
+    // Error was, that the second and further parameter pairs were treated as moveTo,
+    // and so the generated path was empty, resulting in zero width and height of the
+    // bounding box. It has to be treated same as "M 0 0 L 5 10 10 0 N".
+    uno::Reference<drawing::XShape> xShape(xDrawPage->getByIndex(0), uno::UNO_QUERY);
+    CPPUNIT_ASSERT_MESSAGE("Could not get the shape", xShape.is());
+    uno::Reference<beans::XPropertySet> xShapeProps(xShape, uno::UNO_QUERY);
+    CPPUNIT_ASSERT_MESSAGE("Could not get the shape properties", xShapeProps.is());
+    awt::Rectangle aBoundRect;
+    xShapeProps->getPropertyValue(UNO_NAME_MISC_OBJ_BOUNDRECT) >>= aBoundRect;
+    bool bIsZero(aBoundRect.Height == 0 && aBoundRect.Width == 0);
+    CPPUNIT_ASSERT_MESSAGE("Path is empty", !bIsZero);
+}
+
 CPPUNIT_TEST_SUITE_REGISTRATION(CustomshapesTest);
 }
 

xmloff/source/draw/ximpcustomshape.cxx

@@ -792,16 +792,33 @@ static void GetEnhancedPath( std::vector< css::beans::PropertyValue >& rDest,
         }
         else if ( nParameterCount >= nParametersNeeded )
         {
-            // check if the last command is identical,
-            // if so, we just need to increment the count
-            if ( !vSegments.empty() && ( vSegments[ vSegments.size() - 1 ].Command == nLatestSegmentCommand ) )
-                vSegments[ vSegments.size() -1 ].Count++;
-            else
+            // Special rule for moveto in ODF 1.2 section 19.145
+            // "If a moveto is followed by multiple pairs of coordinates, they are treated as lineto."
+            if ( nLatestSegmentCommand == css::drawing::EnhancedCustomShapeSegmentCommand::MOVETO )
             {
                 css::drawing::EnhancedCustomShapeSegment aSegment;
-                aSegment.Command = nLatestSegmentCommand;
+                aSegment.Command = css::drawing::EnhancedCustomShapeSegmentCommand::MOVETO;
                 aSegment.Count = 1;
                 vSegments.push_back( aSegment );
+                nIndex--;
+                nLatestSegmentCommand = css::drawing::EnhancedCustomShapeSegmentCommand::LINETO;
+                nParametersNeeded = 1;
+            }
+            else
+            {
+                // General rule in ODF 1.2. section 19.145
+                // "If a command is repeated multiple times, all repeated command characters
+                // except the first one may be omitted." Thus check if the last command is identical,
+                // if so, we just need to increment the count
+                if ( !vSegments.empty() && ( vSegments[ vSegments.size() - 1 ].Command == nLatestSegmentCommand ) )
+                    vSegments[ vSegments.size() -1 ].Count++;
+                else
+                {
+                    css::drawing::EnhancedCustomShapeSegment aSegment;
+                    aSegment.Command = nLatestSegmentCommand;
+                    aSegment.Count = 1;
+                    vSegments.push_back( aSegment );
+                }
             }
             nParameterCount = 0;
         }