lua: added hud.open_permanent(layoutid)

src/frontend/hud.cpp

@@ -319,6 +319,16 @@ void Hud::drawDebug(int fps){
     fpsMax = max(fps, fpsMax);
 }
 
+/**
+ * Remove all elements marked as removed
+ */
+void Hud::cleanup() {
+    auto it = std::remove_if(elements.begin(), elements.end(), [](const HudElement& e) {
+        return e.isRemoved();
+    });
+    elements.erase(it, elements.end());
+} 
+
 void Hud::update(bool visible) {
     auto level = frontend->getLevel();
     auto player = level->player;
@@ -383,10 +393,7 @@ void Hud::update(bool visible) {
             remove(element);
         }
     }
-    auto it = std::remove_if(elements.begin(), elements.end(), [](const HudElement& e) {
-        return e.isRemoved();
-    });
-    elements.erase(it, elements.end());
+    cleanup();
 }
 
 /** 
@@ -429,6 +436,15 @@ void Hud::openInventory(glm::ivec3 block, UiDocument* doc, std::shared_ptr<Inven
     add(HudElement(hud_element_mode::inventory_bound, doc, blockUI, false));
 }
 
+/** 
+ * Add element as permanent overlay
+ * @param doc element layout document
+ */
+void Hud::openPermanent(UiDocument* doc) {
+    remove(doc->getRoot());
+    add(HudElement(hud_element_mode::permanent, doc, doc->getRoot(), false));
+}
+
 /**
  * Hide inventory and turn off inventory mode
  */
@@ -477,6 +493,17 @@ void Hud::remove(HudElement& element) {
     gui->remove(element.getNode());
 }
 
+// todo: refactor this garbage
+void Hud::remove(std::shared_ptr<UINode> node) {
+    for (auto& element : elements) {
+        if (element.getNode() == node) {
+            element.setRemoved();
+            remove(element);
+        }
+    }
+    cleanup();
+}
+
 void Hud::draw(const GfxContext& ctx){
     auto level = frontend->getLevel();
     auto player = level->player;

src/frontend/hud.h

@@ -55,6 +55,10 @@ public:
 	UiDocument* getDocument() const;
 	std::shared_ptr<gui::UINode> getNode() const;
 
+    void setRemoved() {
+        removed = true;
+    }
+
 	bool isRemoved() const {
 		return removed;
 	}
@@ -90,6 +94,8 @@ class Hud {
     std::shared_ptr<gui::UINode> createDebugPanel(Engine* engine);
     std::shared_ptr<InventoryView> createContentAccess();
     std::shared_ptr<InventoryView> createHotbar();
+
+    void cleanup();
 public:
 	Hud(Engine* engine, LevelFrontend* frontend);
 	~Hud();
@@ -105,9 +111,11 @@ public:
     void openInventory();
 	void openInventory(glm::ivec3 block, UiDocument* doc, std::shared_ptr<Inventory> blockInv);
     void closeInventory();
+    void openPermanent(UiDocument* doc);
 
 	void add(HudElement element);
 	void remove(HudElement& element);
+    void remove(std::shared_ptr<gui::UINode> node);
 };
 
 #endif /* SRC_HUD_H_ */

src/logic/scripting/lua/libhud.cpp

@@ -63,3 +63,14 @@ int l_hud_open_block(lua_State* L) {
     lua_pushstring(L, def->uiLayout.c_str());
     return 2;
 }
+
+int l_hud_open_permanent(lua_State* L) {
+    auto assets = scripting::engine->getAssets();
+    auto name = lua_tostring(L, 1);
+    auto layout = assets->getLayout(name);
+    if (layout == nullptr) {
+        luaL_error(L, "layout '%s' is not found", name);
+    }
+    scripting::hud->openPermanent(layout);
+    return 0;
+}

src/logic/scripting/lua/libhud.h

@@ -6,11 +6,13 @@
 extern int l_hud_open_inventory(lua_State* L);
 extern int l_hud_close_inventory(lua_State* L);
 extern int l_hud_open_block(lua_State* L);
+extern int l_hud_open_permanent(lua_State* L);
 
 static const luaL_Reg hudlib [] = {
     {"open_inventory", l_hud_open_inventory},
     {"close_inventory", l_hud_close_inventory},
     {"open_block", l_hud_open_block},
+    {"open_permanent", l_hud_open_permanent},
     {NULL, NULL}
 };