Feature #152 and potential fix #320

- Added Lua scripts hud.open, inventory.create and inventory.remove
- Window now resizes even if it is not focused

src/frontend/hud.cpp

@@ -388,6 +388,39 @@ void Hud::openInventory() {
     add(HudElement(hud_element_mode::inventory_bound, nullptr, exchangeSlot, false));
 }
 
+void Hud::openInventory(
+    UiDocument* doc,
+    std::shared_ptr<Inventory> inv,
+    bool playerInventory
+) {
+    if (inv == nullptr) {
+        // why try to open nox-existent inventory??
+        return;
+    }
+
+    if (isInventoryOpen()) {
+        closeInventory();
+    }
+    auto level = frontend->getLevel();
+    auto content = level->content;
+    secondInvView = std::dynamic_pointer_cast<InventoryView>(doc->getRoot());
+    if (secondInvView == nullptr) {
+        throw std::runtime_error("secondary UI root element must be 'inventory'");
+    }
+    secondUI = secondInvView;
+
+    if (playerInventory) {
+        openInventory();
+    } else {
+        inventoryOpen = true;
+    }
+    if (inv == nullptr) {
+        inv = level->inventories->createVirtual(secondInvView->getSlotsCount());
+    }
+    secondInvView->bind(inv, content);
+    add(HudElement(hud_element_mode::inventory_bound, doc, secondUI, false));
+}
+
 void Hud::openInventory(
     glm::ivec3 block, 
     UiDocument* doc, 

src/frontend/hud.hpp

@@ -102,6 +102,8 @@ class Hud : public util::ObjectsKeeper {
     std::shared_ptr<gui::InventoryView> inventoryView = nullptr;
     /// @brief Block inventory view
     std::shared_ptr<gui::InventoryView> blockUI = nullptr;
+    /// @brief Secondary inventory view
+    std::shared_ptr<gui::InventoryView> secondInvView = nullptr;
     /// @brief Position of the block open
     glm::ivec3 blockPos {};
     /// @brief Id of the block open (used to detect block destruction or replacement)
@@ -145,6 +147,16 @@ public:
 
     /// @brief Show player inventory in inventory-mode
     void openInventory();
+
+    /// @brief Show inventory in inventory-mode
+    /// @param doc ui layout
+    /// @param inv inventory
+    /// @param playerInventory show player inventory too
+    void openInventory(
+        UiDocument* doc,
+        std::shared_ptr<Inventory> inv,
+        bool playerInventory
+    );
     
     /// @brief Show block inventory in inventory-mode
     /// @param block block position

src/logic/scripting/lua/libs/libhud.cpp

@@ -36,6 +36,26 @@ static int l_close_inventory(lua::State*) {
     return 0;
 }
 
+static int l_open(lua::State* L) {
+    auto invid = lua::tointeger(L, 1);
+    auto layoutid = lua::require_string(L, 2);
+    bool playerInventory = !lua::toboolean(L, 3);
+
+    auto assets = engine->getAssets();
+    auto layout = assets->get<UiDocument>(layoutid);
+    if (layout == nullptr) {
+        throw std::runtime_error("there is no ui layout " + util::quote(layoutid));
+    }
+
+    hud->openInventory(
+        layout,
+        level->inventories->get(invid),
+        playerInventory
+    );
+
+    return 0;
+}
+
 static int l_open_block(lua::State* L) {
     auto x = lua::tointeger(L, 1);
     auto y = lua::tointeger(L, 2);
@@ -154,6 +174,7 @@ static int l_set_debug_cheats(lua::State* L) {
 const luaL_Reg hudlib[] = {
     {"open_inventory", lua::wrap<l_open_inventory>},
     {"close_inventory", lua::wrap<l_close_inventory>},
+    {"open", lua::wrap<l_open>},
     {"open_block", lua::wrap<l_open_block>},
     {"open_permanent", lua::wrap<l_open_permanent>},
     {"show_overlay", lua::wrap<l_show_overlay>},

src/logic/scripting/lua/libs/libinventory.cpp

@@ -109,6 +109,26 @@ static int l_inventory_unbind_block(lua::State* L) {
     return 0;
 }
 
+static int l_inventory_create(lua::State* L) {
+    auto invsize = lua::tointeger(L, 1);
+    auto inv = level->inventories->create(invsize);
+    if (inv == nullptr) {
+        return lua::pushinteger(L, 0);
+    }
+    return lua::pushinteger(L, inv->getId());
+}
+
+static int l_inventory_remove(lua::State* L) {
+    auto invid = lua::tointeger(L, 1);
+    auto inv = get_inventory(invid);
+    if (inv == nullptr) {
+        return 0;
+    }
+
+    level->inventories->remove(invid);
+    return 0;
+}
+
 static int l_inventory_clone(lua::State* L) {
     auto id = lua::tointeger(L, 1);
     auto clone = level->inventories->clone(id);
@@ -145,5 +165,7 @@ const luaL_Reg inventorylib[] = {
     {"get_block", lua::wrap<l_inventory_get_block>},
     {"bind_block", lua::wrap<l_inventory_bind_block>},
     {"unbind_block", lua::wrap<l_inventory_unbind_block>},
+    {"create", lua::wrap<l_inventory_create>},
+    {"remove", lua::wrap<l_inventory_remove>},
     {"clone", lua::wrap<l_inventory_clone>},
     {NULL, NULL}};

src/voxels/Chunk.cpp

@@ -13,7 +13,7 @@ Chunk::Chunk(int xpos, int zpos) : x(xpos), z(zpos) {
     top = CHUNK_H;
 }
 
-bool Chunk::isEmpty() {
+bool Chunk::isEmpty() const {
     int id = -1;
     for (uint i = 0; i < CHUNK_VOL; i++) {
         if (voxels[i].id != id) {

src/voxels/Chunk.hpp

@@ -44,7 +44,7 @@ public:
 
     Chunk(int x, int z);
 
-    bool isEmpty();
+    bool isEmpty() const;
 
     void updateHeights();
 

src/window/Window.cpp

@@ -72,11 +72,9 @@ bool Window::isFocused() {
 
 void window_size_callback(GLFWwindow*, int width, int height) {
     if (width && height) {
-        if (Window::isFocused()) {
-            glViewport(0, 0, width, height);
-            Window::width = width;
-            Window::height = height;
-        }
+        glViewport(0, 0, width, height);
+        Window::width = width;
+        Window::height = height;
 
         if (!Window::isFullscreen() && !Window::isMaximized()) {
             Window::getSettings()->width.set(width);