[partition] Initialize partition layout from config file

In order to keep the partition layout during calamares' execution, we
add a PartitionLayout object instance to PartitionCoreModule. This class
will therefore be used to initialize the PartitionLayout object and
interact with it thoughout the program's execution.

When no partition layout is present in the config file, we initialize
the layout with a single ext4 partition mounted on '/', as it was
previously done.

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>

src/modules/partition/core/PartitionCoreModule.cpp

@@ -43,6 +43,7 @@
 #include "jobs/ResizePartitionJob.h"
 #include "jobs/ResizeVolumeGroupJob.h"
 #include "jobs/SetPartitionFlagsJob.h"
+#include "utils/CalamaresUtils.h"
 
 #include "Typedefs.h"
 #include "utils/Logger.h"
@@ -760,6 +761,32 @@ PartitionCoreModule::setBootLoaderInstallPath( const QString& path )
     m_bootLoaderInstallPath = path;
 }
 
+void
+PartitionCoreModule::initLayout()
+{
+    m_partLayout = new PartitionLayout();
+
+    m_partLayout->addEntry( QString("/"), QString("100%") );
+}
+
+void
+PartitionCoreModule::initLayout( const QVariantList& config )
+{
+    m_partLayout = new PartitionLayout();
+
+    for ( const auto& r : config )
+    {
+        QVariantMap pentry = r.toMap();
+
+        m_partLayout->addEntry( CalamaresUtils::getString( pentry, "name" ),
+                                CalamaresUtils::getString( pentry, "mountPoint" ),
+                                CalamaresUtils::getString( pentry, "filesystem" ),
+                                CalamaresUtils::getString( pentry, "size" ),
+                                CalamaresUtils::getString( pentry, "minSize" )
+                              );
+    }
+}
+
 void
 PartitionCoreModule::revert()
 {

src/modules/partition/core/PartitionCoreModule.h

@@ -20,6 +20,7 @@
 #ifndef PARTITIONCOREMODULE_H
 #define PARTITIONCOREMODULE_H
 
+#include "core/PartitionLayout.h"
 #include "core/PartitionModel.h"
 #include "Typedefs.h"
 
@@ -155,6 +156,9 @@ public:
 
     void setBootLoaderInstallPath( const QString& path );
 
+    void initLayout();
+    void initLayout( const QVariantList& config );
+
     /**
      * @brief jobs creates and returns a list of jobs which can then apply the changes
      * requested by the user.
@@ -246,6 +250,7 @@ private:
     bool m_hasRootMountPoint = false;
     bool m_isDirty = false;
     QString m_bootLoaderInstallPath;
+    PartitionLayout* m_partLayout;
 
     void doInit();
     void updateHasRootMountPoint();

src/modules/partition/gui/PartitionViewStep.cpp

@@ -610,6 +610,15 @@ PartitionViewStep::setConfigurationMap( const QVariantMap& configurationMap )
     QFuture< void > future =
             QtConcurrent::run( this, &PartitionViewStep::initPartitionCoreModule );
     watcher->setFuture( future );
+
+    if ( configurationMap.contains( "partitionLayout" ) )
+    {
+        m_core->initLayout( configurationMap.values( "partitionLayout" ).at(0).toList() );
+    }
+    else
+    {
+        m_core->initLayout();
+    }
 }