Crs (#5908)

Gustry · timlinux · commit bf45d0b61811 · 2017-12-20T10:46:00.000+02:00
* fix display of CRS if invalid CRS * fix #17455 set an empty CRS if the read CRS from XML is wrong * add warning about empty CRS node when reading XML
diff --git a/python/core/qgscoordinatereferencesystem.sip b/python/core/qgscoordinatereferencesystem.sip
@@ -515,6 +515,7 @@ Returns opposite bool value to operator ==
     bool readXml( const QDomNode &node );
 %Docstring
 Restores state from the given DOM node.
+If it fails or if the node is empty, a default not empty CRS will be returned.
 
 :param node: The node from which state will be restored
 
diff --git a/src/core/metadata/qgslayermetadata.cpp b/src/core/metadata/qgslayermetadata.cpp
@@ -366,7 +366,8 @@ bool QgsLayerMetadata::readMetadataXml( const QDomElement &metadataElement )
 
   // crs
   mnl = metadataElement.namedItem( QStringLiteral( "crs" ) );
-  mCrs.readXml( mnl );
+  if ( !mCrs.readXml( mnl ) )
+    mCrs = QgsCoordinateReferenceSystem();
 
   // extent
   mnl = metadataElement.namedItem( QStringLiteral( "extent" ) );
diff --git a/src/core/qgscoordinatereferencesystem.h b/src/core/qgscoordinatereferencesystem.h
@@ -466,6 +466,7 @@ class CORE_EXPORT QgsCoordinateReferenceSystem
 
     /**
      * Restores state from the given DOM node.
+     * If it fails or if the node is empty, a default not empty CRS will be returned.
      * \param node The node from which state will be restored
      * \returns bool True on success, False on failure
      */
diff --git a/src/core/qgsvectorlayer.cpp b/src/core/qgsvectorlayer.cpp
@@ -4032,12 +4032,16 @@ QString QgsVectorLayer::htmlMetadata() const
   }
 
   // EPSG
-  myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) + tr( "CRS" ) + QStringLiteral( "</td><td>" ) + crs().authid() + QStringLiteral( " - " );
-  myMetadata += crs().description() + QStringLiteral( " - " );
-  if ( crs().isGeographic() )
-    myMetadata += tr( "Geographic" );
-  else
-    myMetadata += tr( "Projected" );
+  myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) + tr( "CRS" ) + QStringLiteral( "</td><td>" );
+  if ( crs().isValid() )
+  {
+    myMetadata += crs().authid() + QStringLiteral( " - " );
+    myMetadata += crs().description() + QStringLiteral( " - " );
+    if ( crs().isGeographic() )
+      myMetadata += tr( "Geographic" );
+    else
+      myMetadata += tr( "Projected" );
+  }
   myMetadata += QLatin1String( "</td></tr>\n" );
 
   // Extent
diff --git a/src/core/raster/qgsrasterlayer.cpp b/src/core/raster/qgsrasterlayer.cpp
@@ -324,12 +324,16 @@ QString QgsRasterLayer::htmlMetadata() const
   myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) + tr( "Provider" ) + QStringLiteral( "</td><td>" ) + providerType() + QStringLiteral( "</td></tr>\n" );
 
   // EPSG
-  myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) + tr( "CRS" ) + QStringLiteral( "</td><td>" ) + crs().authid() + QStringLiteral( " - " );
-  myMetadata += crs().description() + QStringLiteral( " - " );
-  if ( crs().isGeographic() )
-    myMetadata += tr( "Geographic" );
-  else
-    myMetadata += tr( "Projected" );
+  myMetadata += QStringLiteral( "<tr><td class=\"highlight\">" ) + tr( "CRS" ) + QStringLiteral( "</td><td>" );
+  if ( crs().isValid() )
+  {
+    myMetadata += crs().authid() + QStringLiteral( " - " );
+    myMetadata += crs().description() + QStringLiteral( " - " );
+    if ( crs().isGeographic() )
+      myMetadata += tr( "Geographic" );
+    else
+      myMetadata += tr( "Projected" );
+  }
   myMetadata += QLatin1String( "</td></tr>\n" );
 
   // Extent
