Fix #10858 - Set relative path to QLR save folder. Load relative to QLR file

Author: NathanW2

python/core/qgsproject.sip

@@ -231,7 +231,7 @@ class QgsProject : QObject
 
     /** prepare a filename to save it to the project file
       @note added in 1.3 */
-    QString writePath( QString filename ) const;
+    QString writePath( QString filename, QString relativeBasePath = QString::null ) const;
 
     /** turn filename read from the project file to an absolute path
       @note added in 1.3 */

src/app/qgisapp.cpp

@@ -4917,8 +4917,9 @@ void QgisApp::saveAsLayerDefinition()
   if ( !path.endsWith( ".qlr" ) )
     path = path.append( ".qlr" );
 
-  QDomDocument doc = QgsMapLayer::asLayerDefinition( layers );
   QFile file( path );
+  QFileInfo fileinfo( file );
+  QDomDocument doc = QgsMapLayer::asLayerDefinition( layers, fileinfo.canonicalFilePath() );
   if ( file.open( QFile::WriteOnly | QFile::Truncate ) )
   {
     QTextStream qlayerstream( &file );

src/core/qgsmaplayer.cpp

@@ -432,7 +432,7 @@ bool QgsMapLayer::readXml( const QDomNode& layer_node )
 
 
 
-bool QgsMapLayer::writeLayerXML( QDomElement& layerElement, QDomDocument& document )
+bool QgsMapLayer::writeLayerXML( QDomElement& layerElement, QDomDocument& document, QString relativeBasePath )
 {
   // use scale dependent visibility flag
   layerElement.setAttribute( "hasScaleBasedVisibilityFlag", hasScaleBasedVisibility() ? 1 : 0 );
@@ -456,26 +456,26 @@ bool QgsMapLayer::writeLayerXML( QDomElement& layerElement, QDomDocument& docume
   if ( vlayer && vlayer->providerType() == "spatialite" )
   {
     QgsDataSourceURI uri( src );
-    QString database = QgsProject::instance()->writePath( uri.database() );
+    QString database = QgsProject::instance()->writePath( uri.database(), relativeBasePath );
     uri.setConnection( uri.host(), uri.port(), database, uri.username(), uri.password() );
     src = uri.uri();
   }
   else if ( vlayer && vlayer->providerType() == "ogr" )
   {
     QStringList theURIParts = src.split( "|" );
-    theURIParts[0] = QgsProject::instance()->writePath( theURIParts[0] );
+    theURIParts[0] = QgsProject::instance()->writePath( theURIParts[0], relativeBasePath );
     src = theURIParts.join( "|" );
   }
   else if ( vlayer && vlayer->providerType() == "delimitedtext" )
   {
     QUrl urlSource = QUrl::fromEncoded( src.toAscii() );
-    QUrl urlDest = QUrl::fromLocalFile( QgsProject::instance()->writePath( urlSource.toLocalFile() ) );
+    QUrl urlDest = QUrl::fromLocalFile( QgsProject::instance()->writePath( urlSource.toLocalFile(), relativeBasePath ) );
     urlDest.setQueryItems( urlSource.queryItems() );
     src = QString::fromAscii( urlDest.toEncoded() );
   }
   else
   {
-    src = QgsProject::instance()->writePath( src );
+    src = QgsProject::instance()->writePath( src, relativeBasePath );
   }
 
   QDomText dataSourceText = document.createTextNode( src );
@@ -599,14 +599,14 @@ bool QgsMapLayer::writeLayerXML( QDomElement& layerElement, QDomDocument& docume
 
 } // bool QgsMapLayer::writeXML
 
-QDomDocument QgsMapLayer::asLayerDefinition( QList<QgsMapLayer *> layers )
+QDomDocument QgsMapLayer::asLayerDefinition( QList<QgsMapLayer *> layers, QString relativeBasePath )
 {
   QDomDocument doc( "qgis-layer-definition" );
   QDomElement layerselm = doc.createElement( "maplayers" );
   foreach ( QgsMapLayer* layer, layers )
   {
     QDomElement layerelm = doc.createElement( "maplayer" );
-    layer->writeLayerXML( layerelm, doc );
+    layer->writeLayerXML( layerelm, doc, relativeBasePath  );
     layerelm.removeChild( layerelm.firstChildElement( "id" ) );
     layerselm.appendChild( layerelm );
   }
@@ -664,6 +664,8 @@ QList<QgsMapLayer *> QgsMapLayer::fromLayerDefinitionFile( const QString qlrfile
     return QList<QgsMapLayer*>();
   }
 
+  QFileInfo fileinfo( file );
+  QDir::setCurrent( fileinfo.absoluteDir().path() );
   return QgsMapLayer::fromLayerDefinition( doc );
 }
 

src/core/qgsmaplayer.h

@@ -217,14 +217,14 @@ class CORE_EXPORT QgsMapLayer : public QObject
 
        @returns true if successful
     */
-    bool writeLayerXML( QDomElement& layerElement, QDomDocument& document );
+    bool writeLayerXML( QDomElement& layerElement, QDomDocument& document, QString relativeBasePath = QString::null );
 
     /** 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( QList<QgsMapLayer*> layers );
+    static QDomDocument asLayerDefinition( QList<QgsMapLayer*> layers, QString relativeBasePath = QString::null );
 
     /** Creates a new layer from a layer defininition document
     */

src/core/qgsproject.cpp

@@ -1561,7 +1561,7 @@ QString QgsProject::readPath( QString src ) const
 }
 
 // return the absolute or relative path to write it to the project file
-QString QgsProject::writePath( QString src ) const
+QString QgsProject::writePath( QString src, QString relativeBasePath ) const
 {
   if ( readBoolEntry( "Paths", "/Absolute", false ) || src.isEmpty() )
   {
@@ -1573,6 +1573,11 @@ QString QgsProject::writePath( QString src ) const
   QString srcPath = srcFileInfo.canonicalFilePath();
   QString projPath = projFileInfo.canonicalFilePath();
 
+  if ( !relativeBasePath.isNull() )
+  {
+    projPath = relativeBasePath;
+  }
+
   if ( projPath.isEmpty() )
   {
     return src;

src/core/qgsproject.h

@@ -276,7 +276,7 @@ class CORE_EXPORT QgsProject : public QObject
 
     /** prepare a filename to save it to the project file
       @note added in 1.3 */
-    QString writePath( QString filename ) const;
+    QString writePath( QString filename, QString relativeBasePath = QString::null ) const;
 
     /** turn filename read from the project file to an absolute path
       @note added in 1.3 */