add rules & add 'show-content-access' rule

res/scripts/stdcmd.lua

@@ -223,3 +223,35 @@ console.add_command(
         fragment:place({x, y, z}, rotation)
     end
 )
+
+console.add_command(
+    "rule.set name:str value:bool",
+    "Set rule value",
+    function(args, kwargs)
+        local name = args[1]
+        local value = args[2]
+        rules.set(name, value)
+        return "rule '"..name.."' set to "..tostring(value)
+    end
+)
+
+console.add_command(
+    "rule.list",
+    "Show registered rules list",
+    function(args, kwargs)
+        local names = ""
+        for name, rule in pairs(rules.rules) do
+            if #names > 0 then
+                names = names .. "\n  "
+            else
+                names = "  "
+            end
+            local value = rule.value
+            if value == nil then
+                value = "not set"
+            end
+            names = names .. name .. ":\t" .. tostring(value)
+        end
+        return "registered rules:\n" .. names
+    end
+)

res/scripts/stdlib.lua

@@ -168,6 +168,64 @@ end
 
 math.randomseed(time.uptime() * 1536227939)
 
+rules = {nexid = 1, rules = {}}
+local _rules = rules
+
+function _rules.get_rule(name)
+    local rule = _rules.rules[name]
+    if rule == nil then
+        rule = {listeners={}}
+        _rules.rules[name] = rule
+    end
+    return rule
+end
+
+function _rules.get(name)
+    local rule = _rules.rules[name]
+    if rule == nil then
+        return nil
+    end
+    return rule.value
+end
+
+function _rules.set(name, value)
+    local rule = _rules.get_rule(name)
+    rule.value = value
+    for _, handler in pairs(rule.listeners) do
+        handler(value)
+    end
+end
+
+function _rules.listen(name, handler)
+    local rule = _rules.get_rule(name)
+    local id = _rules.nexid
+    _rules.nextid = _rules.nexid + 1
+    rule.listeners[utf8.encode(id)] = handler
+    return id
+end
+
+function _rules.create(name, value, handler)
+    print(name, value, handler)
+    _rules.set(name, value)
+    return _rules.listen(name, handler)
+end
+
+function _rules.unlisten(name, id)
+    local rule = _rules.get_rule(name)
+    rule.listeners[utf8.encode(id)] = nil
+end
+
+function _rules.clear()
+    _rules.rules = {}
+    _rules.nextid = 1
+end
+
+function __vc_create_hud_rules()
+    _rules.create("show-content-access", hud._is_content_access(), function(value)
+        hud._set_content_access(value)
+    end)
+end
+
 -- --------- Deprecated functions ------ --
 local function wrap_deprecated(func, name, alternatives)
     return function (...)

src/frontend/hud.cpp

@@ -348,7 +348,7 @@ void Hud::update(bool visible) {
     }
 
     glm::vec2 invSize = contentAccessPanel->getSize();
-    contentAccessPanel->setVisible(inventoryView != nullptr);
+    contentAccessPanel->setVisible(inventoryView != nullptr && showContentPanel);
     contentAccessPanel->setSize(glm::vec2(invSize.x, Window::height));
     contentAccess->setMinSize(glm::vec2(1, Window::height));
     hotbarView->setVisible(visible && !(secondUI && !inventoryView));
@@ -553,7 +553,9 @@ void Hud::updateElementsPosition(const Viewport& viewport) {
     const uint height = viewport.getHeight();
     
     if (inventoryOpen) {
-        float caWidth = inventoryView ? contentAccess->getSize().x : 0.0f;
+        float caWidth = inventoryView && showContentPanel
+                            ? contentAccess->getSize().x
+                            : 0.0f;
         contentAccessPanel->setPos(glm::vec2(width-caWidth, 0));
 
         glm::vec2 invSize = inventoryView ? inventoryView->getSize() : glm::vec2();
@@ -628,3 +630,11 @@ std::shared_ptr<Inventory> Hud::getBlockInventory() {
     }
     return blockUI->getInventory();
 }
+
+bool Hud::isContentAccess() const {
+    return showContentPanel;
+}
+
+void Hud::setContentAccess(bool flag) {
+    showContentPanel = flag;
+}

src/frontend/hud.hpp

@@ -105,6 +105,8 @@ class Hud : public util::ObjectsKeeper {
     glm::ivec3 blockPos {};
     /// @brief Id of the block open (used to detect block destruction or replacement)
     blockid_t currentblockid = 0;
+    /// @brief Show content access panel
+    bool showContentPanel = true;
 
     /// @brief UI element will be dynamicly positioned near to inventory or in screen center
     std::shared_ptr<gui::UINode> secondUI = nullptr;
@@ -172,6 +174,10 @@ public:
 
     std::shared_ptr<Inventory> getBlockInventory();
 
+    bool isContentAccess() const;
+
+    void setContentAccess(bool flag);
+
     static bool showGeneratorMinimap;
 
     /// @brief Runtime updating debug visualization texture

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

@@ -22,21 +22,21 @@ namespace scripting {
 }
 using namespace scripting;
 
-static int l_hud_open_inventory(lua::State*) {
+static int l_open_inventory(lua::State*) {
     if (!hud->isInventoryOpen()) {
         hud->openInventory();
     }
     return 0;
 }
 
-static int l_hud_close_inventory(lua::State*) {
+static int l_close_inventory(lua::State*) {
     if (hud->isInventoryOpen()) {
         hud->closeInventory();
     }
     return 0;
 }
 
-static int l_hud_open_block(lua::State* L) {
+static int l_open_block(lua::State* L) {
     auto x = lua::tointeger(L, 1);
     auto y = lua::tointeger(L, 2);
     auto z = lua::tointeger(L, 3);
@@ -69,7 +69,7 @@ static int l_hud_open_block(lua::State* L) {
     return 2;
 }
 
-static int l_hud_show_overlay(lua::State* L) {
+static int l_show_overlay(lua::State* L) {
     auto name = lua::require_string(L, 1);
     bool playerInventory = lua::toboolean(L, 2);
 
@@ -93,29 +93,29 @@ static UiDocument* require_layout(const char* name) {
     return layout;
 }
 
-static int l_hud_open_permanent(lua::State* L) {
+static int l_open_permanent(lua::State* L) {
     auto layout = require_layout(lua::require_string(L, 1));
     hud->openPermanent(layout);
     return 0;
 }
 
-static int l_hud_close(lua::State* L) {
+static int l_close(lua::State* L) {
     auto layout = require_layout(lua::require_string(L, 1));
     hud->remove(layout->getRoot());
     return 0;
 }
 
-static int l_hud_pause(lua::State*) {
+static int l_pause(lua::State*) {
     hud->setPause(true);
     return 0;
 }
 
-static int l_hud_resume(lua::State*) {
+static int l_resume(lua::State*) {
     hud->setPause(false);
     return 0;
 }
 
-static int l_hud_get_block_inventory(lua::State* L) {
+static int l_get_block_inventory(lua::State* L) {
     auto inventory = hud->getBlockInventory();
     if (inventory == nullptr) {
         return lua::pushinteger(L, 0);
@@ -124,30 +124,41 @@ static int l_hud_get_block_inventory(lua::State* L) {
     }
 }
 
-static int l_hud_get_player(lua::State* L) {
+static int l_get_player(lua::State* L) {
     auto player = hud->getPlayer();
     return lua::pushinteger(L, player->getId());
 }
 
-static int l_hud_is_paused(lua::State* L) {
+static int l_is_paused(lua::State* L) {
     return lua::pushboolean(L, hud->isPause());
 }
 
-static int l_hud_is_inventory_open(lua::State* L) {
+static int l_is_inventory_open(lua::State* L) {
     return lua::pushboolean(L, hud->isInventoryOpen());
 }
 
+static int l_is_content_access(lua::State* L) {
+    return lua::pushboolean(L, hud->isContentAccess());
+}
+
+static int l_set_content_access(lua::State* L) {
+    hud->setContentAccess(lua::toboolean(L, 1));
+    return 0;
+}
+
 const luaL_Reg hudlib[] = {
-    {"open_inventory", lua::wrap<l_hud_open_inventory>},
-    {"close_inventory", lua::wrap<l_hud_close_inventory>},
-    {"open_block", lua::wrap<l_hud_open_block>},
-    {"open_permanent", lua::wrap<l_hud_open_permanent>},
-    {"show_overlay", lua::wrap<l_hud_show_overlay>},
-    {"get_block_inventory", lua::wrap<l_hud_get_block_inventory>},
-    {"close", lua::wrap<l_hud_close>},
-    {"pause", lua::wrap<l_hud_pause>},
-    {"resume", lua::wrap<l_hud_resume>},
-    {"is_paused", lua::wrap<l_hud_is_paused>},
-    {"is_inventory_open", lua::wrap<l_hud_is_inventory_open>},
-    {"get_player", lua::wrap<l_hud_get_player>},
+    {"open_inventory", lua::wrap<l_open_inventory>},
+    {"close_inventory", lua::wrap<l_close_inventory>},
+    {"open_block", lua::wrap<l_open_block>},
+    {"open_permanent", lua::wrap<l_open_permanent>},
+    {"show_overlay", lua::wrap<l_show_overlay>},
+    {"get_block_inventory", lua::wrap<l_get_block_inventory>},
+    {"close", lua::wrap<l_close>},
+    {"pause", lua::wrap<l_pause>},
+    {"resume", lua::wrap<l_resume>},
+    {"is_paused", lua::wrap<l_is_paused>},
+    {"is_inventory_open", lua::wrap<l_is_inventory_open>},
+    {"get_player", lua::wrap<l_get_player>},
+    {"_is_content_access", lua::wrap<l_is_content_access>},
+    {"_set_content_access", lua::wrap<l_set_content_access>},
     {NULL, NULL}};

src/logic/scripting/scripting.cpp

@@ -204,6 +204,11 @@ void scripting::cleanup() {
     }
     lua::pop(L);
 
+    lua::getglobal(L, "rules");
+    lua::getfield(L, "clear");
+    lua::call_nothrow(L, 0);
+    lua::pop(L);
+
     if (lua::getglobal(L, "__scripts_cleanup")) {
         lua::call_nothrow(L, 0);
     }

src/logic/scripting/scripting_hud.cpp

@@ -21,8 +21,14 @@ void scripting::on_frontend_init(Hud* hud, WorldRenderer* renderer) {
     scripting::hud = hud;
     scripting::renderer = renderer;
 
-    lua::openlib(lua::get_main_state(), "hud", hudlib);
-    lua::openlib(lua::get_main_state(), "particles", particleslib);
+    auto L = lua::get_main_state();
+
+    lua::openlib(L, "hud", hudlib);
+    lua::openlib(L, "particles", particleslib);
+
+    if (lua::getglobal(L, "__vc_create_hud_rules")) {
+        lua::call_nothrow(L, 0, 0);
+    }
 
     for (auto& pack : engine->getContentPacks()) {
         lua::emit_event(