SaveTool: implement weapon copying.

This is necessary to add weapon copying.

src/Mass/Mass.h

@@ -101,6 +101,42 @@ struct WeaponPart {
 };
 
 struct Weapon {
+    Weapon() = default;
+
+    Weapon(const Weapon& other) {
+        name = other.name;
+        type = other.type;
+        parts = Containers::Array<WeaponPart>{other.parts.size()};
+        for(UnsignedInt i = 0; i < parts.size(); i++) {
+            parts[i] = other.parts[i];
+        }
+        customStyles = other.customStyles;
+        attached = other.attached;
+        damageType = other.damageType;
+        dualWield = other.dualWield;
+        effectColourMode = other.effectColourMode;
+        effectColour = other.effectColour;
+    }
+    Weapon& operator=(const Weapon& other) {
+        name = other.name;
+        type = other.type;
+        parts = Containers::Array<WeaponPart>{other.parts.size()};
+        for(UnsignedInt i = 0; i < parts.size(); i++) {
+            parts[i] = other.parts[i];
+        }
+        customStyles = other.customStyles;
+        attached = other.attached;
+        damageType = other.damageType;
+        dualWield = other.dualWield;
+        effectColourMode = other.effectColourMode;
+        effectColour = other.effectColour;
+
+        return *this;
+    }
+
+    Weapon(Weapon&& other) = default;
+    Weapon& operator=(Weapon&& other) = default;
+
     std::string name;
     std::string type;
     Containers::Array<WeaponPart> parts;

src/SaveTool/SaveTool_MassViewer.cpp

@@ -651,13 +651,19 @@ void SaveTool::drawWeapons() {
         }                                                                                   \
         if(ImGui::BeginDragDropSource()) {                                                  \
             ImGui::SetDragDropPayload(payload_type, &i, sizeof(UnsignedInt));               \
+            if(ImGui::GetIO().KeyCtrl) {                                                    \
+                ImGui::Text(payload_tooltip " %i - %s (copy)", i + 1, weapon.name.c_str()); \
+            }                                                                               \
+            else {                                                                          \
                 ImGui::Text(payload_tooltip " %i - %s", i + 1, weapon.name.c_str());        \
+            }                                                                               \
             ImGui::EndDragDropSource();                                                     \
         }                                                                                   \
         if(ImGui::BeginDragDropTarget()) {                                                  \
             if(const ImGuiPayload* payload = ImGui::AcceptDragDropPayload(payload_type)) {  \
                 int index = *static_cast<int*>(payload->Data);                              \
                                                                                             \
+                if(!ImGui::GetIO().KeyCtrl) {                                               \
                     if(current_weapon == &_currentMass->array()[index]) {                   \
                         current_weapon = &_currentMass->array()[i];                         \
                     }                                                                       \
@@ -666,6 +672,10 @@ void SaveTool::drawWeapons() {
                     }                                                                       \
                                                                                             \
                     std::swap(_currentMass->array()[index], _currentMass->array()[i]);      \
+                }                                                                           \
+                else {                                                                      \
+                    _currentMass->array()[i] = _currentMass->array()[index];                \
+                }                                                                           \
                 (dirty) = true;                                                             \
             }                                                                               \
                                                                                             \