[layout] Fix title from name when converting a composition

src/core/layout/qgslayoutmanager.cpp

@@ -189,17 +189,22 @@ bool QgsLayoutManager::readXml( const QDomElement &element, const QDomDocument &
   QDomNodeList composerNodes = element.elementsByTagName( QStringLiteral( "Composer" ) );
   for ( int i = 0; i < composerNodes.size(); ++i )
   {
+    // This legacy title is the Composer "title" (that can be overridden by the Composition "name")
+    QString legacyTitle = composerNodes.at( i ).toElement().attribute( QStringLiteral( "title" ) );
     // Convert compositions to layouts
     QDomNodeList compositionNodes = composerNodes.at( i ).toElement().elementsByTagName( QStringLiteral( "Composition" ) );
     for ( int j = 0; j < compositionNodes.size(); ++j )
     {
       std::unique_ptr< QgsLayout > l( QgsCompositionConverter::createLayoutFromCompositionXml( compositionNodes.at( j ).toElement(), mProject ) );
       if ( l )
-        addLayout( l.release() );
+      {
+        if ( l->name().isEmpty() )
+          l->setName( legacyTitle );
+        result = result && addLayout( l.release() );
+      }
     }
 
-    // legacy import
-    QString legacyTitle = composerNodes.at( i ).toElement().attribute( QStringLiteral( "title" ) );
+    // legacy import (to be removed!)
     QgsComposition *c = createCompositionFromXml( composerNodes.at( i ).toElement(), doc );
     if ( !c )
     {

tests/src/core/testqgscompositionconverter.cpp

@@ -29,6 +29,7 @@
 #include "qgsmultibandcolorrenderer.h"
 #include "qgsrasterlayer.h"
 
+#include "qgslayoutmanager.h"
 #include "qgslayoutpagecollection.h"
 #include "qgslayoutitemlabel.h"
 #include "qgslayoutitemshape.h"
@@ -103,6 +104,12 @@ class TestQgsCompositionConverter: public QObject
      */
     void importComposerTemplate();
 
+    /**
+     * Test automatic conversion from a composer template
+     */
+    void convertComposerTemplate();
+
+
   private:
 
     void checkRenderedImage( QgsLayout *layout, const QString testName, const int pageNumber = 0 );
@@ -441,6 +448,21 @@ void TestQgsCompositionConverter::importComposerTemplateScaleBar()
 
 }
 
+
+void TestQgsCompositionConverter::convertComposerTemplate()
+{
+
+  QgsProject project;
+  project.read( QStringLiteral( TEST_DATA_DIR ) + "/layouts/sample_project.qgs" );
+
+  QgsLayout *layout = project.layoutManager()->layouts().first();
+
+  QVERIFY( layout );
+  QCOMPARE( layout->pageCollection()->pageCount(), 2 );
+  QCOMPARE( layout->name(), QStringLiteral( "composer title" ) );
+
+}
+
 void TestQgsCompositionConverter::importComposerTemplate()
 {
   QDomElement docElem( loadComposition( "2x_template.qpt" ) );