[partition] Refactor filling combobox with moint points

- Move to one place which handles the standard mount points
 - While here, introduce explicit "(no mount point)" string
   into the combo box. This is prep-work for issue #951.

src/modules/partition/CMakeLists.txt

@@ -38,6 +38,7 @@ if ( KPMcore_FOUND )
             gui/DeviceInfoWidget.cpp
             gui/EditExistingPartitionDialog.cpp
             gui/EncryptWidget.cpp
+            gui/MountPoints.cpp
             gui/PartitionPage.cpp
             gui/PartitionBarsView.cpp
             gui/PartitionLabelsView.cpp

src/modules/partition/gui/CreatePartitionDialog.cpp

@@ -23,6 +23,7 @@
 #include "core/PartitionInfo.h"
 #include "core/PartUtils.h"
 #include "core/KPMHelpers.h"
+#include "gui/MountPoints.h"
 #include "gui/PartitionSizeController.h"
 
 #include "ui_CreatePartitionDialog.h"
@@ -81,12 +82,7 @@ CreatePartitionDialog::CreatePartitionDialog( Device* device, PartitionNode* par
         m_ui->lvNameLineEdit->setValidator(validator);
     }
 
-    QStringList mountPoints = { "/", "/boot", "/home", "/opt", "/usr", "/var" };
-    if ( PartUtils::isEfiSystem() )
-        mountPoints << Calamares::JobQueue::instance()->globalStorage()->value( "efiSystemPartition" ).toString();
-    mountPoints.removeDuplicates();
-    mountPoints.sort();
-    m_ui->mountPointComboBox->addItems( mountPoints );
+    standardMountPoints( *(m_ui->mountPointComboBox) );
 
     if ( device->partitionTable()->type() == PartitionTable::msdos ||
          device->partitionTable()->type() == PartitionTable::msdos_sectorbased )

src/modules/partition/gui/EditExistingPartitionDialog.cpp

@@ -28,6 +28,7 @@
 #include <core/PartitionInfo.h>
 #include "core/PartUtils.h"
 #include <core/KPMHelpers.h>
+#include "gui/MountPoints.h"
 #include <gui/PartitionSizeController.h>
 
 #include <ui_EditExistingPartitionDialog.h>
@@ -55,13 +56,7 @@ EditExistingPartitionDialog::EditExistingPartitionDialog( Device* device, Partit
     , m_usedMountPoints( usedMountPoints )
 {
     m_ui->setupUi( this );
-
-    QStringList mountPoints = { "/", "/boot", "/home", "/opt", "/usr", "/var" };
-    if ( PartUtils::isEfiSystem() )
-        mountPoints << Calamares::JobQueue::instance()->globalStorage()->value( "efiSystemPartition" ).toString();
-    mountPoints.removeDuplicates();
-    mountPoints.sort();
-    m_ui->mountPointComboBox->addItems( mountPoints );
+    standardMountPoints( *(m_ui->mountPointComboBox) );
 
     QColor color = ColorUtils::colorForPartition( m_partition );
     m_partitionSizeController->init( m_device, m_partition, color );

src/modules/partition/gui/MountPoints.cpp

@@ -0,0 +1,48 @@
+/* === This file is part of Calamares - <https://github.com/calamares> ===
+ *
+ *   Copyright 2014, Aurélien Gâteau <agateau@kde.org>
+ *   Copyright 2016, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2018, Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "MountPoints.h"
+
+#include "core/PartUtils.h"
+
+#include "GlobalStorage.h"
+#include "JobQueue.h"
+
+#include <QComboBox>
+
+QStringList
+standardMountPoints()
+{
+    QStringList mountPoints{ "/", "/boot", "/home", "/opt", "/usr", "/var" };
+    if ( PartUtils::isEfiSystem() )
+        mountPoints << Calamares::JobQueue::instance()->globalStorage()->value( "efiSystemPartition" ).toString();
+    mountPoints.removeDuplicates();
+    mountPoints.sort();
+    return mountPoints;
+}
+
+void
+standardMountPoints(QComboBox& combo)
+{
+    combo.clear();
+    combo.addItem( combo.tr( "(no mount point)" ) );
+    combo.addItems( standardMountPoints() );
+}
+

src/modules/partition/gui/MountPoints.h

@@ -0,0 +1,41 @@
+/* === This file is part of Calamares - <https://github.com/calamares> ===
+ *
+ *   Copyright 2014, Aurélien Gâteau <agateau@kde.org>
+ *   Copyright 2016, Teo Mrnjavac <teo@kde.org>
+ *   Copyright 2018, Adriaan de Groot <groot@kde.org>
+ *
+ *   Calamares is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Calamares is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with Calamares. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PARTITION_GUI_MOUNTPOINTS
+#define PARTITION_GUI_MOUNTPOINTS
+
+#include <QStringList>
+
+class QComboBox;
+
+/**
+ * Returns a list of standard mount points (e.g. /, /usr, ...).
+ * This also includes the EFI mount point if that is necessary
+ * on the target system.
+ */
+QStringList standardMountPoints();
+
+/**
+ * Clears the combobox and fills it with "(no mount point)"
+ * and the elements of standardMountPoints(), above.
+ */
+void standardMountPoints( QComboBox& );
+
+#endif