Fix deck export and mana group ordering

cockatrice/src/interface/deck_loader/deck_loader.cpp

@@ -38,6 +38,7 @@
 #include <QTextTableFormat>
 #include <QVector>
 #include <QtConcurrentRun>
+#include <algorithm>
 #include <functional>
 #include <libcockatrice/card/database/card_database_manager.h>
 #include <libcockatrice/card/import/card_name_normalizer.h>
@@ -371,8 +372,12 @@ bool DeckLoader::saveToStream_Plain(QTextStream &out,
         saveToStream_DeckHeader(out, deckList);
     }
 
-    // loop zones
+    // Plain deck readers expect the main deck before the sideboard. Reorder a
-    for (auto zoneNode : deckList.getZoneNodes()) {
+    // copy so native saves and the relative order of other zones stay intact.
+    auto zones = deckList.getZoneNodes();
+    std::stable_partition(zones.begin(), zones.end(),
+                          [](const auto *zone) { return zone->getName() == DECK_ZONE_MAIN; });
+    for (auto zoneNode : zones) {
         saveToStream_DeckZone(out, zoneNode, addComments, addSetNameAndNumber);
 
         // end of zone

cockatrice/src/interface/widgets/cards/deck_card_zone_display_widget.cpp

@@ -69,6 +69,7 @@ DeckCardZoneDisplayWidget::DeckCardZoneDisplayWidget(QWidget *parent,
     updateZoneCardCount();
 
     connect(deckListModel, &QAbstractItemModel::rowsInserted, this, &DeckCardZoneDisplayWidget::onCategoryAddition);
+    connect(deckListModel, &QAbstractItemModel::layoutChanged, this, &DeckCardZoneDisplayWidget::displayCards);
     if (selectionModel) {
         connect(selectionModel, &QItemSelectionModel::selectionChanged, this,
                 &DeckCardZoneDisplayWidget::onSelectionChanged);
@@ -174,6 +175,9 @@ void DeckCardZoneDisplayWidget::displayCards()
 
     for (const QPersistentModelIndex &persistent : rows) {
         constructAppropriateWidget(persistent);
+        // Reuse existing widgets when a model sort moves their persistent rows.
+        // This preserves collapsed groups and card selection during live edits.
+        cardGroupLayout->insertWidget(persistent.row(), indexToWidgetMap.value(persistent));
     }
 }
 

libcockatrice_deck_list/libcockatrice/deck_list/deck_list.cpp

@@ -340,7 +340,17 @@ bool DeckList::saveToStream_Plain(QTextStream &stream, bool prefixSideboardCards
         }
     };
 
-    forEachCard(writeToStream);
+    // Export the main deck first without changing the saved tree's zone order.
+    forEachCard([&](const auto node, const auto card) {
+        if (node->getName() == DECK_ZONE_MAIN) {
+            writeToStream(node, card);
+        }
+    });
+    forEachCard([&](const auto node, const auto card) {
+        if (node->getName() != DECK_ZONE_MAIN) {
+            writeToStream(node, card);
+        }
+    });
     return true;
 }
 

libcockatrice_models/libcockatrice/models/deck_list/deck_list_model.cpp

@@ -739,7 +739,8 @@ QModelIndex DeckListModel::nodeToIndex(AbstractDecklistNode *node) const
 void DeckListModel::sortShadowTree(InnerDecklistNode *node, Qt::SortOrder order)
 {
     // The mapping is not needed: fresh shadow nodes have no persistent indices yet.
-    (void)DeckListModelCustomZones::sortWithCustomZonesLast(root, node, order);
+    (void)DeckListModelCustomZones::sortWithCustomZonesLast(
+        root, node, order, activeGroupCriteria == DeckListModelGroupCriteria::MANA_COST && lastKnownColumn != 0);
 
     for (int i = node->size() - 1; i >= 0; --i) {
         if (auto *subNode = dynamic_cast<InnerDecklistNode *>(node->at(i))) {
@@ -752,7 +753,8 @@ void DeckListModel::sortHelper(InnerDecklistNode *node, Qt::SortOrder order)
 {
     // Sort children (custom zones always sorted after groups within a board) and
     // use the movement mapping to update the list of persistent indices.
-    const auto mapping = DeckListModelCustomZones::sortWithCustomZonesLast(root, node, order);
+    const auto mapping = DeckListModelCustomZones::sortWithCustomZonesLast(
+        root, node, order, activeGroupCriteria == DeckListModelGroupCriteria::MANA_COST && lastKnownColumn != 0);
 
     QModelIndexList from, to;
     int columns = columnCount();

libcockatrice_models/libcockatrice/models/deck_list/deck_list_model_custom_zones.cpp

@@ -8,6 +8,8 @@
 #include <QHash>
 #include <QSharedPointer>
 #include <QVector>
+#include <algorithm>
+#include <cmath>
 #include <utility>
 
 namespace DeckListModelCustomZones
@@ -111,7 +113,7 @@ QList<QPair<int, int>> plainSort(InnerDecklistNode *node, Qt::SortOrder order)
  *
  * @return The (preSortRow, finalRow) mapping covering both the sort and the shift.
  */
-QList<QPair<int, int>> boardSort(InnerDecklistNode *node, Qt::SortOrder order)
+QList<QPair<int, int>> boardSort(InnerDecklistNode *node, Qt::SortOrder order, bool numericGroups)
 {
     const QVector<QPair<int, int>> sortResult = node->sort(order);
 
@@ -132,6 +134,27 @@ QList<QPair<int, int>> boardSort(InnerDecklistNode *node, Qt::SortOrder order)
         }
     }
 
+    if (numericGroups) {
+        // Only criteria groups are numeric. Mixing numeric and lexical fallback
+        // comparisons with custom zone names would not define a strict ordering.
+        std::sort(groups.begin(), groups.end(), [order](const auto *left, const auto *right) {
+            const QString leftName = left->getName();
+            const QString rightName = right->getName();
+            bool leftIsNumber, rightIsNumber;
+            const double leftValue = leftName.toDouble(&leftIsNumber);
+            const double rightValue = rightName.toDouble(&rightIsNumber);
+            leftIsNumber = leftIsNumber && std::isfinite(leftValue);
+            rightIsNumber = rightIsNumber && std::isfinite(rightValue);
+            if (leftIsNumber != rightIsNumber) {
+                return leftIsNumber;
+            }
+            if (leftIsNumber && leftValue != rightValue) {
+                return order == Qt::AscendingOrder ? leftValue < rightValue : leftValue > rightValue;
+            }
+            return order == Qt::AscendingOrder ? leftName < rightName : leftName > rightName;
+        });
+    }
+
     QVector<AbstractDecklistNode *> ordered = groups + customZones;
     for (int i = 0; i < ordered.size(); ++i) {
         node->replace(i, ordered[i]);
@@ -147,10 +170,11 @@ QList<QPair<int, int>> boardSort(InnerDecklistNode *node, Qt::SortOrder order)
 
 } // namespace
 
-QList<QPair<int, int>> sortWithCustomZonesLast(InnerDecklistNode *root, InnerDecklistNode *node, Qt::SortOrder order)
+QList<QPair<int, int>>
+sortWithCustomZonesLast(InnerDecklistNode *root, InnerDecklistNode *node, Qt::SortOrder order, bool numericGroups)
 {
     const bool isBoardZone = (node != root) && (node->getParent() == root);
-    return isBoardZone ? boardSort(node, order) : plainSort(node, order);
+    return isBoardZone ? boardSort(node, order, numericGroups) : plainSort(node, order);
 }
 
 } // namespace DeckListModelCustomZones

libcockatrice_models/libcockatrice/models/deck_list/deck_list_model_custom_zones.h

@@ -91,10 +91,15 @@ void mirrorCustomZones(const InnerDecklistNode *deckBoardZone, InnerDecklistNode
  * @param root Root of the shadow tree (used to classify board zones).
  * @param node The shadow node whose children are reordered.
  * @param order Sort order to apply.
+ * @param numericGroups Compare criteria-group names as mana values. Custom zone
+ * names and card names retain their normal comparison; nonnumeric groups follow
+ * numeric groups in either sort direction.
  * @return A list of (preSortRow, finalRow) pairs describing how each node moved.
  */
-[[nodiscard]] QList<QPair<int, int>>
+[[nodiscard]] QList<QPair<int, int>> sortWithCustomZonesLast(InnerDecklistNode *root,
-sortWithCustomZonesLast(InnerDecklistNode *root, InnerDecklistNode *node, Qt::SortOrder order);
+                                                             InnerDecklistNode *node,
+                                                             Qt::SortOrder order,
+                                                             bool numericGroups = false);
 
 } // namespace DeckListModelCustomZones
 

tests/deck_list_model/deck_list_model_custom_zones_test.cpp

@@ -278,6 +278,37 @@ TEST(DeckListModelCustomZones, SortPlainNodeDoesNotReorderCustomZones)
     EXPECT_EQ(mapping[1].second, 1);
 }
 
+TEST(DeckListModelCustomZones, ManaGroupsUseNumericOrderWithoutChangingOtherNodes)
+{
+    InnerDecklistNode root;
+    auto *board = new InnerDecklistNode(DECK_ZONE_MAIN, &root);
+    const QStringList original = {"10", "2", "0.5", "1000000", "1", "unknown", "nan"};
+    for (const auto &name : original) {
+        new InnerDecklistNode(name, board);
+    }
+    auto *custom = new DecklistModelSubZoneNode("1x", board);
+    new InnerDecklistNode("10", custom);
+    new InnerDecklistNode("2", custom);
+    root.setSortMethod(DeckSortMethod::ByName);
+
+    const auto mapping = DeckListModelCustomZones::sortWithCustomZonesLast(&root, board, Qt::AscendingOrder, true);
+    EXPECT_EQ(childNames(board), (QStringList{"0.5", "1", "2", "10", "1000000", "nan", "unknown", "1x"}));
+    QStringList before = original;
+    before.append("1x");
+    for (const auto &move : mapping) {
+        EXPECT_EQ(board->at(move.second)->getName(), before.at(move.first));
+    }
+
+    (void)DeckListModelCustomZones::sortWithCustomZonesLast(&root, board, Qt::DescendingOrder, true);
+    EXPECT_EQ(childNames(board), (QStringList{"1000000", "10", "2", "1", "0.5", "unknown", "nan", "1x"}));
+
+    // The numeric flag only affects groups directly under a board.
+    (void)DeckListModelCustomZones::sortWithCustomZonesLast(&root, custom, Qt::AscendingOrder, true);
+    EXPECT_EQ(childNames(custom), (QStringList{"10", "2"}));
+    (void)DeckListModelCustomZones::sortWithCustomZonesLast(&root, board, Qt::AscendingOrder);
+    EXPECT_EQ(childNames(board), (QStringList{"0.5", "1", "10", "1000000", "2", "nan", "unknown", "1x"}));
+}
+
 int main(int argc, char **argv)
 {
     ::testing::InitGoogleTest(&argc, argv);

tests/deck_list_zones/deck_list_zones_test.cpp

@@ -393,6 +393,28 @@ TEST(DeckListZones, MaybeboardCustomZoneCardsAreExcludedFromHash)
     EXPECT_EQ(deck.getDeckHash(), expected.getDeckHash());
 }
 
+TEST(DeckListZones, PlainExportPutsMainFirstWithoutReorderingSavedZones)
+{
+    DeckList deck;
+    auto *tree = deck.getTree();
+    ASSERT_NE(tree->addCustomZone(DECK_ZONE_SIDE, "Side Tech"), nullptr);
+    tree->addCard("Side Card", 2, "Side Tech", -1);
+    tree->addCard("Token Card", 1, DECK_ZONE_TOKENS, -1);
+    ASSERT_NE(tree->addCustomZone(DECK_ZONE_MAIN, "Removal"), nullptr);
+    tree->addCard("Main Card", 3, "Removal", -1);
+    ASSERT_NE(tree->addCustomZone(DECK_ZONE_MAYBEBOARD, "Candidates"), nullptr);
+    tree->addCard("Maybe Card", 4, "Candidates", -1);
+
+    const QString native = deck.writeToString_Native();
+    EXPECT_EQ(deck.writeToString_Plain(true, false), QString("3 Main Card\nSB: 2 Side Card\n1 Token Card\n"));
+    EXPECT_EQ(deck.writeToString_Plain(false, false), QString("3 Main Card\n2 Side Card\n1 Token Card\n"));
+    EXPECT_EQ(deck.writeToString_Native(), native);
+
+    DeckList reopened(native);
+    EXPECT_EQ(reopened.getZoneNodes().first()->getName(), DECK_ZONE_SIDE);
+    EXPECT_EQ(reopened.writeToString_Plain(true, false), deck.writeToString_Plain(true, false));
+}
+
 int main(int argc, char **argv)
 {
     ::testing::InitGoogleTest(&argc, argv);