Merge pull request #4049 from boundlessgeo/master-SldRotationFix

Tests and fix to read sld:Rotation when does not have ogc sub tags

src/core/qgsogcutils.cpp

@@ -1603,6 +1603,16 @@ QgsExpression* QgsOgcUtils::expressionFromOgcFilter( const QDomElement& element
 
   QgsExpression *expr = new QgsExpression();
 
+  // check if it is a single string value not having DOM elements
+  // that express OGC operators
+  if ( element.firstChild().nodeType() == QDomNode::TextNode )
+  {
+    expr->setExpression( element.firstChild().nodeValue() );
+    return expr;
+  }
+
+  // then check OGC DOM elements that contain OGC tags specifying
+  // OGC operators.
   QDomElement childElem = element.firstChildElement();
   while ( !childElem.isNull() )
   {

src/core/symbology-ng/qgssymbollayerutils.cpp

@@ -2499,6 +2499,7 @@ bool QgsSymbolLayerUtils::createFunctionElement( QDomDocument &doc, QDomElement
 
 bool QgsSymbolLayerUtils::functionFromSldElement( QDomElement &element, QString &function )
 {
+  // check if ogc:Filter or containe ogc:Filters
   QDomElement elem = element;
   if ( element.tagName() != QLatin1String( "Filter" ) )
   {
@@ -2514,7 +2515,7 @@ bool QgsSymbolLayerUtils::functionFromSldElement( QDomElement &element, QString
     return false;
   }
 
-
+  // parse ogc:Filter
   QgsExpression *expr = QgsOgcUtils::expressionFromOgcFilter( elem );
   if ( !expr )
     return false;

tests/src/python/test_qgssymbollayer_readsld.py

@@ -87,5 +87,31 @@ class TestQgsSymbolLayerReadSld(unittest.TestCase):
         testLineWidth()
         testLineOpacity()
 
+    def testSimpleMarkerRotation(self):
+        """
+        Test if pointMarker property sld:Rotation value can be read if format is:
+        <sld:Rotation>50.0</sld:Rotation>
+        or
+        <se:Rotation><ogc:Literal>50</ogc:Literal></se:Rotation>
+        """
+        # technically it's not necessary to use a real shape, but a empty memory
+        # layer. In case these tests will upgrate to a rendering where to
+        # compare also rendering not only properties
+        #myShpFile = os.path.join(unitTestDataPath(), 'points.shp')
+        #layer = QgsVectorLayer(myShpFile, 'points', 'ogr')
+        layer = QgsVectorLayer("Point", "addfeat", "memory")
+        assert(layer.isValid())
+        # test if able to read <sld:Rotation>50.0</sld:Rotation>
+        mFilePath = os.path.join(unitTestDataPath(), 'symbol_layer/external_sld/testSimpleMarkerRotation-directValue.sld')
+        layer.loadSldStyle(mFilePath)
+        props = layer.renderer().symbol().symbolLayers()[0].properties()
+        self.assertEqual(props['angle'], '50')
+        # test if able to read <se:Rotation><ogc:Literal>50</ogc:Literal></se:Rotation>
+        mFilePath = os.path.join(unitTestDataPath(), 'symbol_layer/external_sld/testSimpleMarkerRotation-ogcLiteral.sld')
+        layer.loadSldStyle(mFilePath)
+        props = layer.renderer().symbol().symbolLayers()[0].properties()
+        self.assertEqual(props['angle'], '50')
+
+
 if __name__ == '__main__':
     unittest.main()

tests/testdata/symbol_layer/external_sld/testSimpleMarkerRotation-directValue.sld

@@ -0,0 +1,30 @@
+<?xml version="1.0" ?>
+<sld:StyledLayerDescriptor version="1.0.0" xmlns="http://www.opengis.net/sld" xmlns:gml="http://www.opengis.net/gml" xmlns:ogc="http://www.opengis.net/ogc" xmlns:sld="http://www.opengis.net/sld">
+	<sld:NamedLayer>
+		<sld:Name>testSimpleMarkerRotation</sld:Name>
+		<sld:UserStyle>
+			<sld:Name>testSimpleMarkerRotation</sld:Name>
+			<sld:FeatureTypeStyle>
+				<sld:Name>name</sld:Name>
+				<sld:Rule>
+					<sld:Name>Single symbol</sld:Name>
+					<sld:PointSymbolizer>
+						<sld:Graphic>
+							<sld:Mark>
+								<sld:WellKnownName>star</sld:WellKnownName>
+								<sld:Fill>
+									<sld:CssParameter name="fill">#ff0000</sld:CssParameter>
+								</sld:Fill>
+								<sld:Stroke>
+									<sld:CssParameter name="stroke">#00ff00</sld:CssParameter>
+								</sld:Stroke>
+							</sld:Mark>
+							<sld:Size>36</sld:Size>
+							<sld:Rotation>50.0</sld:Rotation>
+						</sld:Graphic>
+					</sld:PointSymbolizer>
+				</sld:Rule>
+			</sld:FeatureTypeStyle>
+		</sld:UserStyle>
+	</sld:NamedLayer>
+</sld:StyledLayerDescriptor>

tests/testdata/symbol_layer/external_sld/testSimpleMarkerRotation-ogcLiteral.sld

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.1.0" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="http://www.opengis.net/sld http://schemas.opengis.net/sld/1.1.0/StyledLayerDescriptor.xsd" xmlns:se="http://www.opengis.net/se">
+  <NamedLayer>
+    <se:Name>points</se:Name>
+    <UserStyle>
+      <se:Name>points</se:Name>
+      <se:FeatureTypeStyle>
+        <se:Rule>
+          <se:Name>Single symbol</se:Name>
+          <se:PointSymbolizer>
+            <se:Graphic>
+              <se:Mark>
+                <se:WellKnownName>regular_star</se:WellKnownName>
+                <se:Fill>
+                  <se:SvgParameter name="fill">#ff0000</se:SvgParameter>
+                </se:Fill>
+                <se:Stroke>
+                  <se:SvgParameter name="stroke">#00ff00</se:SvgParameter>
+                </se:Stroke>
+              </se:Mark>
+              <se:Size>10</se:Size>
+              <se:Rotation>
+                <ogc:Literal>50</ogc:Literal>
+              </se:Rotation>
+            </se:Graphic>
+          </se:PointSymbolizer>
+        </se:Rule>
+      </se:FeatureTypeStyle>
+    </UserStyle>
+  </NamedLayer>
+</StyledLayerDescriptor>