Adds a few magic to make the parser more tolerant of typos and allows…

… the creation of empty geometry using empty parentheses like 'LineString ( )'.
qgis · Aug 24, 2020 · d349fc4 · d349fc4
1 parent 7212fec
commit d349fc4
Show file tree

Hide file tree

Showing 7 changed files with 39 additions and 27 deletions.
diff --git a/src/core/geometry/qgscircularstring.cpp b/src/core/geometry/qgscircularstring.cpp
@@ -314,12 +314,13 @@ bool QgsCircularString::fromWkt( const QString &wkt )
     return false;
   mWkbType = parts.first;
 
-  if ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 )
+  parts.second = parts.second.remove( '(' ).remove( ')' );
+  QString secondWithoutParentheses = parts.second;
+  secondWithoutParentheses = secondWithoutParentheses.simplified().remove( ' ' );
+  if ( ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 ) ||
+       secondWithoutParentheses.isEmpty() )
     return true;
 
-  if ( parts.second.compare( QLatin1String( "NULL" ), Qt::CaseInsensitive ) == 0 )
-    return false;
-
   QgsPointSequence points = QgsGeometryUtils::pointsFromWKT( parts.second, is3D(), isMeasure() );
   if ( points.isEmpty() )
     return false;

diff --git a/src/core/geometry/qgscompoundcurve.cpp b/src/core/geometry/qgscompoundcurve.cpp
@@ -179,12 +179,12 @@ bool QgsCompoundCurve::fromWkt( const QString &wkt )
     return false;
   mWkbType = parts.first;
 
-  if ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 )
+  QString secondWithoutParentheses = parts.second;
+  secondWithoutParentheses = secondWithoutParentheses.remove( '(' ).remove( ')' ).simplified().remove( ' ' );
+  if ( ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 ) ||
+       secondWithoutParentheses.isEmpty() )
     return true;
 
-  if ( parts.second.compare( QLatin1String( "NULL" ), Qt::CaseInsensitive ) == 0 )
-    return false;
-
   QString defaultChildWkbType = QStringLiteral( "LineString%1%2" ).arg( is3D() ? QStringLiteral( "Z" ) : QString(), isMeasure() ? QStringLiteral( "M" ) : QString() );
 
   const QStringList blocks = QgsGeometryUtils::wktGetChildBlocks( parts.second, defaultChildWkbType );

diff --git a/src/core/geometry/qgscurvepolygon.cpp b/src/core/geometry/qgscurvepolygon.cpp
@@ -215,12 +215,12 @@ bool QgsCurvePolygon::fromWkt( const QString &wkt )
 
   mWkbType = parts.first;
 
-  if ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 )
+  QString secondWithoutParentheses = parts.second;
+  secondWithoutParentheses = secondWithoutParentheses.remove( '(' ).remove( ')' ).simplified().remove( ' ' );
+  if ( ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 ) ||
+       secondWithoutParentheses.isEmpty() )
     return true;
 
-  if ( parts.second.compare( QLatin1String( "NULL" ), Qt::CaseInsensitive ) == 0 )
-    return false;
-
   QString defaultChildWkbType = QStringLiteral( "LineString%1%2" ).arg( is3D() ? QStringLiteral( "Z" ) : QString(), isMeasure() ? QStringLiteral( "M" ) : QString() );
 
   const QStringList blocks = QgsGeometryUtils::wktGetChildBlocks( parts.second, defaultChildWkbType );

diff --git a/src/core/geometry/qgsgeometrycollection.cpp b/src/core/geometry/qgsgeometrycollection.cpp
@@ -698,12 +698,12 @@ bool QgsGeometryCollection::fromCollectionWkt( const QString &wkt, const QVector
   }
   mWkbType = parts.first;
 
-  if ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 )
+  QString secondWithoutParentheses = parts.second;
+  secondWithoutParentheses = secondWithoutParentheses.remove( '(' ).remove( ')' ).simplified().remove( ' ' );
+  if ( ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 ) ||
+       secondWithoutParentheses.isEmpty() )
     return true;
 
-  if ( parts.second.compare( QLatin1String( "NULL" ), Qt::CaseInsensitive ) == 0 )
-    return false;
-
   QString defChildWkbType = QStringLiteral( "%1%2%3 " ).arg( defaultChildWkbType, is3D() ? QStringLiteral( "Z" ) : QString(), isMeasure() ? QStringLiteral( "M" ) : QString() );
 
   const QStringList blocks = QgsGeometryUtils::wktGetChildBlocks( parts.second, defChildWkbType );

diff --git a/src/core/geometry/qgsgeometryutils.cpp b/src/core/geometry/qgsgeometryutils.cpp
@@ -1100,6 +1100,7 @@ QgsPointSequence QgsGeometryUtils::pointsFromWKT( const QString &wktCoordinateLi
 {
   int dim = 2 + is3D + isMeasure;
   QgsPointSequence points;
+
   const QStringList coordList = wktCoordinateList.split( ',', QString::SkipEmptyParts );
 
   //first scan through for extra unexpected dimensions
@@ -1306,9 +1307,7 @@ QPair<QgsWkbTypes::Type, QString> QgsGeometryUtils::wktReadBlock( const QString
 {
   QString wktParsed = wkt;
   QString contents;
-  if ( wktParsed.count( '(' ) != wktParsed.count( ')' ) ) // if unbalanced parenthesis will returns false
+  if ( wkt.contains( QString( "EMPTY" ), Qt::CaseInsensitive ) )
-    contents = QStringLiteral( "NULL" );
-  else if ( wkt.contains( QString( "EMPTY" ), Qt::CaseInsensitive ) )
   {
     QRegularExpression wktRegEx( QStringLiteral( "^\\s*(\\w+)\\s+(\\w+)\\s*$" ) );
     wktRegEx.setPatternOptions( QRegularExpression::DotMatchesEverythingOption );
@@ -1321,6 +1320,14 @@ QPair<QgsWkbTypes::Type, QString> QgsGeometryUtils::wktReadBlock( const QString
   }
   else
   {
+    const int openedParenthesisCount = wktParsed.count( '(' );
+    const int closedParenthesisCount = wktParsed.count( ')' );
+    // closes missing parentheses
+    for ( int i = 0 ;  i < openedParenthesisCount - closedParenthesisCount; ++i )
+      wktParsed.push_back( ')' );
+    // removes extra parentheses
+    wktParsed.truncate( wktParsed.size() - ( closedParenthesisCount - openedParenthesisCount ) );
+
     QRegularExpression cooRegEx( QStringLiteral( "^[^\\(]*\\((.*)\\)[^\\)]*$" ) );
     cooRegEx.setPatternOptions( QRegularExpression::DotMatchesEverythingOption );
     QRegularExpressionMatch match = cooRegEx.match( wktParsed );

diff --git a/src/core/geometry/qgslinestring.cpp b/src/core/geometry/qgslinestring.cpp
@@ -434,13 +434,16 @@ bool QgsLineString::fromWkt( const QString &wkt )
     return false;
   mWkbType = parts.first;
 
-  if ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 )
+  QString secondWithoutParentheses = parts.second;
+  secondWithoutParentheses = secondWithoutParentheses.remove( '(' ).remove( ')' ).simplified().remove( ' ' );
+  parts.second = parts.second.remove( '(' ).remove( ')' );
+  if ( ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 ) ||
+       secondWithoutParentheses.isEmpty() )
     return true;
 
-  if ( parts.second.compare( QLatin1String( "NULL" ), Qt::CaseInsensitive ) == 0 )
-    return false;
-
   QgsPointSequence points = QgsGeometryUtils::pointsFromWKT( parts.second, is3D(), isMeasure() );
+  // There is a non number in the coordinates sequence
+  // LineString ( A b, 1 2)
   if ( points.isEmpty() )
     return false;
 

diff --git a/src/core/geometry/qgspoint.cpp b/src/core/geometry/qgspoint.cpp
@@ -169,12 +169,13 @@ bool QgsPoint::fromWkt( const QString &wkt )
     return false;
   mWkbType = parts.first;
 
-  if ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 )
+  QString secondWithoutParentheses = parts.second;
+  secondWithoutParentheses = secondWithoutParentheses.remove( '(' ).remove( ')' ).simplified().remove( ' ' );
+  parts.second = parts.second.remove( '(' ).remove( ')' );
+  if ( ( parts.second.compare( QLatin1String( "EMPTY" ), Qt::CaseInsensitive ) == 0 ) ||
+       secondWithoutParentheses.isEmpty() )
     return true;
 
-  if ( parts.second.compare( QLatin1String( "NULL" ), Qt::CaseInsensitive ) == 0 )
-    return false;
-
   QRegularExpression rx( QStringLiteral( "\\s" ) );
   QStringList coordinates = parts.second.split( rx, QString::SkipEmptyParts );