[PATCH] [BUGFIX] Load layer from definition does not use qlr as relat…

…ive path

Fixes #15656 Loading QLR file with relative path does not work correctly

python/core/qgslayerdefinition.sip

@@ -14,11 +14,11 @@ class QgsLayerDefinition
     /** Loads the QLR at path into QGIS.  New layers are added to rootGroup and the map layer registry*/
     static bool loadLayerDefinition( const QString & path, QgsLayerTreeGroup* rootGroup, QString &errorMessage /Out/ );
     /** Loads the QLR from the XML document.  New layers are added to rootGroup and the map layer registry */
-    static bool loadLayerDefinition( QDomDocument doc, QgsLayerTreeGroup* rootGroup, QString &errorMessage /Out/ );
+    static bool loadLayerDefinition( QDomDocument doc, QgsLayerTreeGroup* rootGroup, QString &errorMessage, const QString& relativeBasePath = QString() );
     /** Export the selected layer tree nodes to a QLR file */
     static bool exportLayerDefinition( QString path, const QList<QgsLayerTreeNode*>& selectedTreeNodes, QString &errorMessage /Out/ );
     /** Export the selected layer tree nodes to a QLR-XML document */
-    static bool exportLayerDefinition( QDomDocument doc, const QList<QgsLayerTreeNode*>& selectedTreeNodes, QString &errorMessage, const QString& relativeBasePath = QString::null );
+    static bool exportLayerDefinition( QDomDocument doc, const QList<QgsLayerTreeNode*>& selectedTreeNodes, QString &errorMessage, const QString& relativeBasePath = QString() );
 
     /**
      * Class used to work with layer dependencies stored in a XML project or layer definition file

python/core/qgsmaplayer.sip

@@ -288,6 +288,7 @@ class QgsMapLayer : QObject
 
     /** Sets state from Dom document
        @param layerElement The Dom element corresponding to ``maplayer'' tag
+       @param relativeBasePath base path for relative paths
        @note
 
        The Dom node corresponds to a Dom document project file XML element read
@@ -300,7 +301,7 @@ class QgsMapLayer : QObject
 
        @returns true if successful
      */
-    bool readLayerXML( const QDomElement& layerElement );
+    bool readLayerXML( const QDomElement& layerElement, const QString& relativeBasePath = QString() );
 
 
     /** Stores state in Dom node
@@ -319,18 +320,18 @@ class QgsMapLayer : QObject
      *
      * @returns true if successful
      */
-    bool writeLayerXML( QDomElement& layerElement, QDomDocument& document, const QString& relativeBasePath = QString::null );
+    bool writeLayerXML( QDomElement& layerElement, QDomDocument& document, const QString& relativeBasePath = QString() );
 
     /** Returns the given layer as a layer definition document
      *  Layer definitions store the data source as well as styling and custom properties.
      *
      *  Layer definitions can be used to load a layer and styling all from a single file.
      */
-    static QDomDocument asLayerDefinition( const QList<QgsMapLayer*>& layers, const QString& relativeBasePath = QString::null );
+    static QDomDocument asLayerDefinition( const QList<QgsMapLayer*>& layers, const QString& relativeBasePath = QString() );
 
     /** Creates a new layer from a layer defininition document
      */
-    static QList<QgsMapLayer*> fromLayerDefinition( QDomDocument& document, bool addToRegistry = false, bool addToLegend = false );
+    static QList<QgsMapLayer*> fromLayerDefinition( QDomDocument& document, bool addToRegistry = false, bool addToLegend = false, const QString& relativeBasePath = QString() );
     static QList<QgsMapLayer*> fromLayerDefinitionFile( const QString &qlrfile );
 
     /** Set a custom property for layer. Properties are stored in a map and saved in project file. */

python/core/qgsproject.sip

@@ -198,10 +198,10 @@ class QgsProject : QObject
     void dumpProperties() const;
 
     /** Prepare a filename to save it to the project file */
-    QString writePath( const QString& filename, const QString& relativeBasePath = QString::null ) const;
+    QString writePath( const QString& filename, const QString& relativeBasePath = QString() ) const;
 
     /** Turn filename read from the project file to an absolute path */
-    QString readPath( QString filename ) const;
+    QString readPath( QString filename, const QString& relativeBasePath = QString() ) const;
 
     /** Return error message from previous read/write */
     QString error() const;

src/core/qgslayerdefinition.cpp

@@ -45,10 +45,10 @@ bool QgsLayerDefinition::loadLayerDefinition( const QString &path, QgsLayerTreeG
   QFileInfo fileinfo( file );
   QDir::setCurrent( fileinfo.absoluteDir().path() );
 
-  return loadLayerDefinition( doc, rootGroup, errorMessage );
+  return loadLayerDefinition( doc, rootGroup, errorMessage, fileinfo.canonicalFilePath() );
 }
 
-bool QgsLayerDefinition::loadLayerDefinition( QDomDocument doc, QgsLayerTreeGroup *rootGroup, QString &errorMessage )
+bool QgsLayerDefinition::loadLayerDefinition( QDomDocument doc, QgsLayerTreeGroup *rootGroup, QString &errorMessage, const QString& relativeBasePath )
 {
   Q_UNUSED( errorMessage );
 
@@ -121,7 +121,7 @@ bool QgsLayerDefinition::loadLayerDefinition( QDomDocument doc, QgsLayerTreeGrou
     loadInLegend = false;
   }
 
-  QList<QgsMapLayer*> layers = QgsMapLayer::fromLayerDefinition( doc, /*addToRegistry*/ true, loadInLegend );
+  QList<QgsMapLayer*> layers = QgsMapLayer::fromLayerDefinition( doc, /*addToRegistry*/ true, loadInLegend, relativeBasePath );
 
   // Now that all layers are loaded, refresh the vectorjoins to get the joined fields
   Q_FOREACH ( QgsMapLayer* layer, layers )

src/core/qgslayerdefinition.h

@@ -30,11 +30,11 @@ class CORE_EXPORT QgsLayerDefinition
     /** Loads the QLR at path into QGIS.  New layers are added to rootGroup and the map layer registry*/
     static bool loadLayerDefinition( const QString & path, QgsLayerTreeGroup* rootGroup, QString &errorMessage );
     /** Loads the QLR from the XML document.  New layers are added to rootGroup and the map layer registry */
-    static bool loadLayerDefinition( QDomDocument doc, QgsLayerTreeGroup* rootGroup, QString &errorMessage );
+    static bool loadLayerDefinition( QDomDocument doc, QgsLayerTreeGroup* rootGroup, QString &errorMessage, const QString& relativeBasePath = QString() );
     /** Export the selected layer tree nodes to a QLR file */
     static bool exportLayerDefinition( QString path, const QList<QgsLayerTreeNode*>& selectedTreeNodes, QString &errorMessage );
     /** Export the selected layer tree nodes to a QLR-XML document */
-    static bool exportLayerDefinition( QDomDocument doc, const QList<QgsLayerTreeNode*>& selectedTreeNodes, QString &errorMessage, const QString& relativeBasePath = QString::null );
+    static bool exportLayerDefinition( QDomDocument doc, const QList<QgsLayerTreeNode*>& selectedTreeNodes, QString &errorMessage, const QString& relativeBasePath = QString() );
 
     /**
      * \ingroup core

src/core/qgsmaplayer.cpp

@@ -174,7 +174,7 @@ void QgsMapLayer::drawLabels( QgsRenderContext& rendererContext )
   Q_UNUSED( rendererContext );
 }
 
-bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
+bool QgsMapLayer::readLayerXML( const QDomElement& layerElement, const QString& relativeBasePath )
 {
   bool layerError;
 
@@ -205,19 +205,19 @@ bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
   if ( provider == "spatialite" )
   {
     QgsDataSourceURI uri( mDataSource );
-    uri.setDatabase( QgsProject::instance()->readPath( uri.database() ) );
+    uri.setDatabase( QgsProject::instance()->readPath( uri.database(), relativeBasePath ) );
     mDataSource = uri.uri();
   }
   else if ( provider == "ogr" )
   {
     QStringList theURIParts = mDataSource.split( '|' );
-    theURIParts[0] = QgsProject::instance()->readPath( theURIParts[0] );
+    theURIParts[0] = QgsProject::instance()->readPath( theURIParts[0], relativeBasePath );
     mDataSource = theURIParts.join( "|" );
   }
   else if ( provider == "gpx" )
   {
     QStringList theURIParts = mDataSource.split( '?' );
-    theURIParts[0] = QgsProject::instance()->readPath( theURIParts[0] );
+    theURIParts[0] = QgsProject::instance()->readPath( theURIParts[0], relativeBasePath );
     mDataSource = theURIParts.join( "?" );
   }
   else if ( provider == "delimitedtext" )
@@ -231,7 +231,7 @@ bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
       urlSource.setPath( file.path() );
     }
 
-    QUrl urlDest = QUrl::fromLocalFile( QgsProject::instance()->readPath( urlSource.toLocalFile() ) );
+    QUrl urlDest = QUrl::fromLocalFile( QgsProject::instance()->readPath( urlSource.toLocalFile(), relativeBasePath ) );
     urlDest.setQueryItems( urlSource.queryItems() );
     mDataSource = QString::fromAscii( urlDest.toEncoded() );
   }
@@ -329,7 +329,7 @@ bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
           QString filename = r.cap( 1 );
           if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
             filename = filename.mid( 1, filename.length() - 2 );
-          mDataSource = "NETCDF:\"" + QgsProject::instance()->readPath( filename ) + "\":" + r.cap( 2 );
+          mDataSource = "NETCDF:\"" + QgsProject::instance()->readPath( filename, relativeBasePath ) + "\":" + r.cap( 2 );
           handled = true;
         }
       }
@@ -343,7 +343,7 @@ bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
           QString filename = r.cap( 2 );
           if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
             filename = filename.mid( 1, filename.length() - 2 );
-          mDataSource = "HDF4_SDS:" + r.cap( 1 ) + ":\"" + QgsProject::instance()->readPath( filename ) + "\":" + r.cap( 3 );
+          mDataSource = "HDF4_SDS:" + r.cap( 1 ) + ":\"" + QgsProject::instance()->readPath( filename, relativeBasePath ) + "\":" + r.cap( 3 );
           handled = true;
         }
       }
@@ -357,7 +357,7 @@ bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
           QString filename = r.cap( 1 );
           if ( filename.startsWith( '"' ) && filename.endsWith( '"' ) )
             filename = filename.mid( 1, filename.length() - 2 );
-          mDataSource = "HDF5:\"" + QgsProject::instance()->readPath( filename ) + "\":" + r.cap( 2 );
+          mDataSource = "HDF5:\"" + QgsProject::instance()->readPath( filename, relativeBasePath ) + "\":" + r.cap( 2 );
           handled = true;
         }
       }
@@ -368,14 +368,14 @@ bool QgsMapLayer::readLayerXML( const QDomElement& layerElement )
         QRegExp r( "([^:]+):([^:]+):(.+)" );
         if ( r.exactMatch( mDataSource ) )
         {
-          mDataSource = r.cap( 1 ) + ':' + r.cap( 2 ) + ':' + QgsProject::instance()->readPath( r.cap( 3 ) );
+          mDataSource = r.cap( 1 ) + ':' + r.cap( 2 ) + ':' + QgsProject::instance()->readPath( r.cap( 3 ), relativeBasePath );
           handled = true;
         }
       }
     }
 
     if ( !handled )
-      mDataSource = QgsProject::instance()->readPath( mDataSource );
+      mDataSource = QgsProject::instance()->readPath( mDataSource, relativeBasePath );
   }
 
   // Set the CRS from project file, asking the user if necessary.
@@ -817,7 +817,7 @@ QDomDocument QgsMapLayer::asLayerDefinition( const QList<QgsMapLayer *>& layers,
   return doc;
 }
 
-QList<QgsMapLayer*> QgsMapLayer::fromLayerDefinition( QDomDocument& document, bool addToRegistry, bool addToLegend )
+QList<QgsMapLayer*> QgsMapLayer::fromLayerDefinition( QDomDocument& document, bool addToRegistry, bool addToLegend, const QString& relativeBasePath )
 {
   QList<QgsMapLayer*> layers;
   QDomNodeList layernodes = document.elementsByTagName( "maplayer" );
@@ -847,7 +847,7 @@ QList<QgsMapLayer*> QgsMapLayer::fromLayerDefinition( QDomDocument& document, bo
     if ( !layer )
       continue;
 
-    bool ok = layer->readLayerXML( layerElem );
+    bool ok = layer->readLayerXML( layerElem, relativeBasePath );
     if ( ok )
     {
       layers << layer;

src/core/qgsmaplayer.h

@@ -310,6 +310,7 @@ class CORE_EXPORT QgsMapLayer : public QObject
 
     /** Sets state from Dom document
        @param layerElement The Dom element corresponding to ``maplayer'' tag
+       @param relativeBasePath base path for relative paths
        @note
 
        The Dom node corresponds to a Dom document project file XML element read
@@ -322,7 +323,7 @@ class CORE_EXPORT QgsMapLayer : public QObject
 
        @returns true if successful
      */
-    bool readLayerXML( const QDomElement& layerElement );
+    bool readLayerXML( const QDomElement& layerElement, const QString& relativeBasePath = QString() );
 
 
     /** Stores state in Dom node
@@ -341,18 +342,18 @@ class CORE_EXPORT QgsMapLayer : public QObject
      *
      * @returns true if successful
      */
-    bool writeLayerXML( QDomElement& layerElement, QDomDocument& document, const QString& relativeBasePath = QString::null );
+    bool writeLayerXML( QDomElement& layerElement, QDomDocument& document, const QString& relativeBasePath = QString() );
 
     /** Returns the given layer as a layer definition document
      *  Layer definitions store the data source as well as styling and custom properties.
      *
      *  Layer definitions can be used to load a layer and styling all from a single file.
      */
-    static QDomDocument asLayerDefinition( const QList<QgsMapLayer*>& layers, const QString& relativeBasePath = QString::null );
+    static QDomDocument asLayerDefinition( const QList<QgsMapLayer*>& layers, const QString& relativeBasePath = QString() );
 
     /** Creates a new layer from a layer defininition document
      */
-    static QList<QgsMapLayer*> fromLayerDefinition( QDomDocument& document, bool addToRegistry = false, bool addToLegend = false );
+    static QList<QgsMapLayer*> fromLayerDefinition( QDomDocument& document, bool addToRegistry = false, bool addToLegend = false, const QString& relativeBasePath = QString() );
     static QList<QgsMapLayer*> fromLayerDefinitionFile( const QString &qlrfile );
 
     /** Set a custom property for layer. Properties are stored in a map and saved in project file. */

src/core/qgsproject.cpp

@@ -1432,7 +1432,7 @@ void QgsProject::dumpProperties() const
   dump_( imp_->properties_ );
 }
 
-QString QgsProject::readPath( QString src ) const
+QString QgsProject::readPath( QString src, const QString& relativeBasePath ) const
 {
   if ( readBoolEntry( "Paths", "/Absolute", false ) )
   {
@@ -1493,6 +1493,11 @@ QString QgsProject::readPath( QString src ) const
   QString srcPath = src;
   QString projPath = fileName();
 
+  if ( !relativeBasePath.isNull() )
+  {
+    projPath = relativeBasePath;
+  }
+
   if ( projPath.isEmpty() )
   {
     return vsiPrefix + src;

src/core/qgsproject.h

@@ -256,10 +256,10 @@ class CORE_EXPORT QgsProject : public QObject
     /** Prepare a filename to save it to the project file. Creates an absolute or relative path to writes
      * it to the project file.
     */
-    QString writePath( const QString& filename, const QString& relativeBasePath = QString::null ) const;
+    QString writePath( const QString& filename, const QString& relativeBasePath = QString() ) const;
 
     /** Turn filename read from the project file to an absolute path */
-    QString readPath( QString filename ) const;
+    QString readPath( QString filename, const QString& relativeBasePath = QString() ) const;
 
     /** Return error message from previous read/write */
     QString error() const;