Fixed the rebasing-mess

homann · homann · commit 1f1448d4144c · 2012-09-04T12:10:04.000+02:00
diff --git a/src/core/qgsexpression.cpp b/src/core/qgsexpression.cpp
@@ -787,6 +787,18 @@ static QVariant fcnRound( const QVariantList& values , QgsFeature *f, QgsExpress
   return QVariant();
 }
 
+static QVariant fcnScale( const QVariantList&, QgsFeature*, QgsExpression* parent )
+{
+  return QVariant( parent->scale() );
+}
+
+static QVariant fcnFormatNumber( const QVariantList& values, QgsFeature*, QgsExpression* parent )
+{
+  double value = getDoubleValue( values.at( 0 ), parent );
+  int places = getIntValue( values.at( 1 ), parent );
+  return QString( "%L1" ).arg( value, 0, 'f', places );
+}
+
 QList<QgsExpression::FunctionDef> QgsExpression::gmBuiltinFunctions;
 
 const QList<QgsExpression::FunctionDef> &QgsExpression::BuiltinFunctions()
@@ -842,6 +854,7 @@ const QList<QgsExpression::FunctionDef> &QgsExpression::BuiltinFunctions()
     << FunctionDef( "right", 2, fcnRight, QObject::tr( "String" ) )
     << FunctionDef( "rpad", 3, fcnRPad, QObject::tr( "String" ) )
     << FunctionDef( "lpad", 3, fcnLPad, QObject::tr( "String" ) )
+    << FunctionDef( "format_number", 2, fcnFormatNumber, QObject::tr( "String" ) )
 
     // geometry accessors
     << FunctionDef( "xat", 1, fcnXat, QObject::tr( "Geometry" ), "", true )
@@ -854,6 +867,7 @@ const QList<QgsExpression::FunctionDef> &QgsExpression::BuiltinFunctions()
     // special columns
     << FunctionDef( "$rownum", 0, fcnRowNumber, QObject::tr( "Record" ) )
     << FunctionDef( "$id", 0, fcnFeatureId, QObject::tr( "Record" ) )
+    << FunctionDef( "$scale", 0, fcnScale, QObject::tr( "Record" ) )
     ;
   }
 
@@ -887,7 +901,7 @@ QgsExpression::QgsExpression( const QString& expr )
     : mExpression( expr )
     , mRowNumber( 0 )
     , mScale( 0 )
-   
+
 {
   initGeomCalculator();
 
@@ -902,7 +916,6 @@ QgsExpression::QgsExpression( const QString& expr )
 QgsExpression::~QgsExpression()
 {
   delete mRootNode;
-  delete mCalc;
 }
 
 QStringList QgsExpression::referencedColumns()
@@ -1041,6 +1054,56 @@ void QgsExpression::acceptVisitor( QgsExpression::Visitor& v )
     mRootNode->accept( v );
 }
 
+QString QgsExpression::replaceExpressionText( QString action, QgsFeature &feat,
+    QgsVectorLayer* layer,
+    const QMap<QString, QVariant> *substitutionMap )
+{
+  QString expr_action;
+
+  int index = 0;
+  while ( index < action.size() )
+  {
+    QRegExp rx = QRegExp( "\\[%([^\\]]+)%\\]" );
+
+    int pos = rx.indexIn( action, index );
+    if ( pos < 0 )
+      break;
+
+    int start = index;
+    index = pos + rx.matchedLength();
+    QString to_replace = rx.cap( 1 ).trimmed();
+    QgsDebugMsg( "Found expression: " + to_replace );
+
+    if ( substitutionMap && substitutionMap->contains( to_replace ) )
+    {
+      expr_action += action.mid( start, pos - start ) + substitutionMap->value( to_replace ).toString();
+      continue;
+    }
+
+    QgsExpression exp( to_replace );
+    if ( exp.hasParserError() )
+    {
+      QgsDebugMsg( "Expression parser error: " + exp.parserErrorString() );
+      expr_action += action.mid( start, index - start );
+      continue;
+    }
+
+    QVariant result = exp.evaluate( &feat, layer->pendingFields() );
+    if ( exp.hasEvalError() )
+    {
+      QgsDebugMsg( "Expression parser eval error: " + exp.evalErrorString() );
+      expr_action += action.mid( start, index - start );
+      continue;
+    }
+
+    QgsDebugMsg( "Expression result is: " + result.toString() );
+    expr_action += action.mid( start, pos - start ) + result.toString();
+  }
+
+  expr_action += action.mid( index );
+  return expr_action;
+}
+
 
 QgsExpression::Node* QgsExpression::Node::createFromOgcFilter( QDomElement &element, QString &errorMessage )
 {
diff --git a/src/core/qgsexpression.h b/src/core/qgsexpression.h
@@ -532,7 +532,6 @@ class CORE_EXPORT QgsExpression
     int mRowNumber;
     double mScale;
 
-    void initGeomCalculator();
     QgsDistanceArea mCalc;
 };
 
