[partition] Move BootLoaderModel convenience functions

- These were hidden inside PartitionPage, but are useful elsewhere.

src/modules/partition/core/BootLoaderModel.cpp

@@ -23,9 +23,13 @@
 #include "core/PartitionInfo.h"
 #include "core/KPMHelpers.h"
 
+#include "utils/Logger.h"
+
 // KPMcore
 #include <kpmcore/core/device.h>
 
+#include <QComboBox>
+
 static QStandardItem*
 createBootLoaderItem( const QString& description, const QString& path, bool isPartition )
 {
@@ -148,3 +152,48 @@ BootLoaderModel::data( const QModelIndex& index, int role ) const
     }
     return QStandardItemModel::data( index, role );
 }
+
+namespace Calamares
+{
+int
+findBootloader( const QAbstractItemModel* model, const QString& path )
+{
+    for ( int i = 0; i < model->rowCount(); ++i)
+    {
+        const auto index = model->index( i, 0, QModelIndex() );
+        if ( !index.isValid() )
+            continue;
+        QVariant var = model->data( index, BootLoaderModel::BootLoaderPathRole );
+        if ( var.isValid() && var.toString() == path )
+            return i;
+    }
+
+    return -1;
+}
+
+void
+restoreSelectedBootLoader( QComboBox& combo, const QString& path )
+{
+    const auto* model = combo.model();
+    if ( model->rowCount() < 1 )
+    {
+        cDebug() << "No items in BootLoaderModel";
+        return;
+    }
+
+    int r = -1;
+    if ( path.isEmpty() )
+    {
+        combo.setCurrentIndex( 0 );
+    }
+    else if ( (r = findBootloader( model, path )) >= 0 )
+    {
+        combo.setCurrentIndex( r );
+    }
+    else
+    {
+        combo.setCurrentIndex( 0 );
+    }
+}
+
+}  // namespace

src/modules/partition/core/BootLoaderModel.h

@@ -25,6 +25,7 @@
 #include <QStandardItemModel>
 
 class Device;
+class QComboBox;
 
 /**
  * This model contains one entry for each device MBR plus one entry for the
@@ -63,4 +64,20 @@ private:
     void updateInternal();
 };
 
+namespace Calamares
+{
+    /** @brief Returns the row number of boot-loader @p path (e.g. /dev/sda)
+     *
+     * Assuming the @p model is a BootLoaderModel, will return a row number
+     * in the model. Returns -1 otherwise.
+     */
+    int findBootloader( const QAbstractItemModel* model, const QString& path );
+
+    /** @brief Tries to set @p path as selected item in @p combo
+     *
+     * Matches a boot-loader install path (e.g. /dev/sda) with a model
+     * row and sets that as the current row.
+     */
+    void restoreSelectedBootLoader( QComboBox& combo, const QString& path );
+}  // namespace
 #endif /* BOOTLOADERMODEL_H */

src/modules/partition/gui/PartitionPage.cpp

@@ -511,45 +511,10 @@ PartitionPage::updateSelectedBootLoaderIndex()
     cDebug() << "Selected bootloader index" << m_lastSelectedBootLoaderIndex;
 }
 
-int
-findBootloader( const QAbstractItemModel* model, const QString& path )
-{
-    for ( int i = 0; i < model->rowCount(); ++i)
-    {
-        const auto index = model->index( i, 0, QModelIndex() );
-        if ( !index.isValid() )
-            continue;
-        QVariant var = model->data( index, BootLoaderModel::BootLoaderPathRole );
-        if ( var.isValid() && var.toString() == path )
-            return i;
-    }
-
-    return -1;
-}
-
 void
 PartitionPage::restoreSelectedBootLoader()
 {
-    const auto* model = m_ui->bootLoaderComboBox->model();
-    if ( model->rowCount() < 1 )
-    {
-        cDebug() << "No items in BootLoaderModel";
-        return;
-    }
-
-    int r = -1;
-    if ( m_core->bootLoaderInstallPath().isEmpty() )
-    {
-        m_ui->bootLoaderComboBox->setCurrentIndex( 0 );
-    }
-    else if ( (r = findBootloader( model, m_core->bootLoaderInstallPath() )) >= 0 )
-    {
-        m_ui->bootLoaderComboBox->setCurrentIndex( r );
-    }
-    else
-    {
-        m_ui->bootLoaderComboBox->setCurrentIndex( 0 );
-    }
+    Calamares::restoreSelectedBootLoader( *(m_ui->bootLoaderComboBox), m_core->bootLoaderInstallPath() );
 }