lua: gui library (WIP)

res/layouts/inventory.xml

@@ -1,3 +1,10 @@
-<inventory color="#1F1F1FE0" size="400,0">
+<inventory color="#1F1F1FE0" size="0,400">
     <slots-grid rows="4" count="40" sharefunc="inventory_share_func"/>
+    <button id="btn" 
+            coord="8,300" 
+            size="140,30" 
+            z-index="1" 
+            onclick="document.btn.text = tostring(time.uptime())">
+            -----
+    </button>
 </inventory>

res/layouts/inventory.xml.lua

@@ -1,9 +1,12 @@
-function on_open(inv)
-    print("OPEN", inv)
+local Document = require("core:document")
+document = Document.new(DOC_NAME)
+
+function on_open(invid)
+    print("OPEN", invid)
 end
 
-function on_close(inv)
-    print("CLOSE", inv)
+function on_close(invid)
+    print("CLOSE", invid)
 end
 
 function inventory_share_func(invid, slotid)

res/modules/document.lua

@@ -0,0 +1,22 @@
+local Element = {}
+function Element.new(docname, name)
+    return setmetatable({docname=docname, name=name}, {
+        __index=function(self, k)
+            return gui.getattr(self.docname, self.name, k)
+        end,
+        __newindex=function(self, k, v)
+            gui.setattr(self.docname, self.name, k, v)
+        end
+    })
+end
+
+local Document = {}
+function Document.new(docname)
+    return setmetatable({name=docname}, {
+        __index=function(self, k)
+            return Element.new(self.name, k)
+        end
+    })
+end
+
+return Document

res/scripts/stdlib.lua

@@ -91,3 +91,23 @@ end
 function pack.is_installed(packid)
     return file.isfile(packid..":package.json")
 end
+
+vec2_mt = {}
+function vec2_mt.__tostring(self)
+    return "vec2("..self[1]..", "..self[2]..")"
+end
+
+vec3_mt = {}
+function vec3_mt.__tostring(self)
+    return "vec3("..self[1]..", "..self[2]..", "..self[3]..")"
+end
+
+vec4_mt = {}
+function vec4_mt.__tostring(self)
+    return "vec4("..self[1]..", "..self[2]..", "..self[3]..", "..self[4]..")"
+end
+
+color_mt = {}
+function color_mt.__tostring(self)
+    return "rgba("..self[1]..", "..self[2]..", "..self[3]..", "..self[4]..")"
+end

src/frontend/UiDocument.cpp

@@ -30,6 +30,14 @@ const std::shared_ptr<gui::UINode> UiDocument::getRoot() const {
     return root;
 }
 
+const std::shared_ptr<gui::UINode> UiDocument::get(const std::string& id) const {
+    auto found = map.find(id);
+    if (found == map.end()) {
+        return nullptr;
+    }
+    return found->second;
+}
+
 const uidocscript& UiDocument::getScript() const {
     return script;
 }

src/frontend/UiDocument.h

@@ -43,6 +43,7 @@ public:
     const std::string& getId() const;
     const uinodes_map& getMap() const;
     const std::shared_ptr<gui::UINode> getRoot() const;
+    const std::shared_ptr<gui::UINode> get(const std::string& id) const;
     const uidocscript& getScript() const;
     int getEnvironment() const;
     /* Collect map of all uinodes having identifiers */

src/frontend/gui/UINode.cpp

@@ -110,6 +110,10 @@ void UINode::setCoord(glm::vec2 coord) {
     this->coord = coord;
 }
 
+glm::vec2 UINode::getCoord() const {
+    return coord;
+}
+
 glm::vec2 UINode::getSize() const {
     return size;
 }

src/frontend/gui/UINode.h

@@ -112,6 +112,7 @@ namespace gui {
         /* Calculate screen position of the element */
         virtual glm::vec2 calcCoord() const;
         virtual void setCoord(glm::vec2 coord);
+        glm::vec2 getCoord() const;
         virtual glm::vec2 getSize() const;
         virtual void setSize(glm::vec2 size);
         virtual void refresh() {};

src/logic/scripting/LuaState.cpp

@@ -1,6 +1,7 @@
 #include "LuaState.h"
 
-#include "api_lua.h"
+#include "api/api_lua.h"
+#include "api/libgui.h"
 #include "../../util/stringutil.h"
 
 lua::luaerror::luaerror(const std::string& message) : std::runtime_error(message) {
@@ -98,6 +99,7 @@ void lua::LuaState::createFuncs() {
     openlib("item", itemlib, 0);
     openlib("time", timelib, 0);
     openlib("file", filelib, 0);
+    openlib("gui", guilib, 0);
 
     addfunc("print", l_print);
 

src/logic/scripting/api/api_lua.h

@@ -1,29 +1,29 @@
 #ifndef LOGIC_SCRIPTING_API_LUA_H_
 #define LOGIC_SCRIPTING_API_LUA_H_
 
-#include "scripting.h"
-#include "lua_util.h"
+#include "../scripting.h"
+#include "../lua_util.h"
 
 #include <glm/glm.hpp>
 #include <iostream>
 
-#include "../../files/files.h"
-#include "../../physics/Hitbox.h"
-#include "../../objects/Player.h"
-#include "../../world/Level.h"
-#include "../../world/World.h"
-#include "../../content/Content.h"
-#include "../../voxels/Block.h"
-#include "../../voxels/Chunks.h"
-#include "../../voxels/voxel.h"
-#include "../../items/ItemDef.h"
-#include "../../items/ItemStack.h"
-#include "../../items/Inventory.h"
-#include "../../items/Inventories.h"
-#include "../../lighting/Lighting.h"
-#include "../../logic/BlocksController.h"
-#include "../../window/Window.h"
-#include "../../engine.h"
+#include "../../../files/files.h"
+#include "../../../physics/Hitbox.h"
+#include "../../../objects/Player.h"
+#include "../../../world/Level.h"
+#include "../../../world/World.h"
+#include "../../../content/Content.h"
+#include "../../../voxels/Block.h"
+#include "../../../voxels/Chunks.h"
+#include "../../../voxels/voxel.h"
+#include "../../../items/ItemDef.h"
+#include "../../../items/ItemStack.h"
+#include "../../../items/Inventory.h"
+#include "../../../items/Inventories.h"
+#include "../../../lighting/Lighting.h"
+#include "../../../logic/BlocksController.h"
+#include "../../../window/Window.h"
+#include "../../../engine.h"
 
 /* == file library == */
 static int l_file_resolve(lua_State* L) {

src/logic/scripting/api/libgui.cpp

@@ -0,0 +1,77 @@
+#include "libgui.h"
+
+#include <iostream>
+#include "../scripting.h"
+#include "../lua_util.h"
+
+#include "../../../engine.h"
+#include "../../../assets/Assets.h"
+#include "../../../frontend/gui/UINode.h"
+#include "../../../frontend/gui/controls.h"
+#include "../../../frontend/UiDocument.h"
+#include "../../../util/stringutil.h"
+
+static gui::UINode* getDocumentNode(lua_State* L, const std::string& name, const std::string& nodeName) {
+    auto doc = scripting::engine->getAssets()->getLayout(name);
+    if (doc == nullptr) {
+        luaL_error(L, "document '%s' not found", name.c_str());
+    }
+    auto node = doc->get(nodeName);
+    if (node == nullptr) {
+        luaL_error(L, "document '%s' has no element with id '%s'", name.c_str(), nodeName.c_str());
+    }
+    return node.get();
+}
+
+static bool getattr(lua_State* L, gui::Button* button, const std::string& attr) {
+    if (button == nullptr)
+        return false;
+    if (attr == "text") {
+        lua_pushstring(L, util::wstr2str_utf8(button->getText()).c_str());
+        return true;
+    }
+    return false;
+}
+
+static bool setattr(lua_State* L, gui::Button* button, const std::string& attr) {
+    if (button == nullptr)
+        return false;
+    if (attr == "text") {
+        button->setText(util::str2wstr_utf8(lua_tostring(L, 4)));
+        return true;
+    }
+    return false;
+}
+
+int l_gui_getattr(lua_State* L) {
+    auto docname = lua_tostring(L, 1);
+    auto element = lua_tostring(L, 2);
+    const std::string attr = lua_tostring(L, 3);
+    auto node = getDocumentNode(L, docname, element);
+
+    if (attr == "color") {
+        return lua::pushcolor_arr(L, node->getColor());
+    } else if (attr == "coord") {
+        return lua::pushvec2_arr(L, node->getCoord());
+    } else if (attr == "size") {
+        return lua::pushvec2_arr(L, node->getSize());
+    }
+
+    if (getattr(L, dynamic_cast<gui::Button*>(node), attr))
+        return 1;
+
+    return 0;
+}
+
+int l_gui_setattr(lua_State* L) {
+    auto docname = lua_tostring(L, 1);
+    auto element = lua_tostring(L, 2);
+    const std::string attr = lua_tostring(L, 3);
+
+    auto node = getDocumentNode(L, docname, element);
+
+    if (setattr(L, dynamic_cast<gui::Button*>(node), attr))
+        return 0;
+
+    return 0;
+}

src/logic/scripting/api/libgui.h

@@ -0,0 +1,15 @@
+#ifndef LOGIC_SCRIPTING_API_LIBGUI_H_
+#define LOGIC_SCRIPTING_API_LIBGUI_H_
+
+#include <lua.hpp>
+
+extern int l_gui_getattr(lua_State* L);
+extern int l_gui_setattr(lua_State* L);
+
+static const luaL_Reg guilib [] = {
+    {"getattr", l_gui_getattr},
+    {"setattr", l_gui_setattr},
+    {NULL, NULL}
+};
+
+#endif // LOGIC_SCRIPTING_API_LIBGUI_H_

src/logic/scripting/lua_util.h

@@ -2,6 +2,8 @@
 #define LOGIC_SCRIPTING_LUA_UTIL_H_
 
 #include <lua.hpp>
+#include <glm/glm.hpp>
+#include "LuaState.h"
 
 namespace lua {
     inline int pushivec3(lua_State* L, luaint x, luaint y, luaint z) {
@@ -10,6 +12,79 @@ namespace lua {
         lua_pushinteger(L, z);
         return 3;
     }
+
+    inline int pushvec3(lua_State* L, glm::vec3 vec) {
+        lua_pushnumber(L, vec.x);
+        lua_pushnumber(L, vec.y);
+        lua_pushnumber(L, vec.z);
+        return 3;
+    }
+
+    inline int pushvec4(lua_State* L, glm::vec4 vec) {
+        lua_pushnumber(L, vec.x);
+        lua_pushnumber(L, vec.y);
+        lua_pushnumber(L, vec.z);
+        lua_pushnumber(L, vec.w);
+        return 4;
+    }
+
+    inline int pushvec2_arr(lua_State* L, glm::vec2 vec) {
+        lua_createtable(L, 2, 0);
+        lua_getglobal(L, "vec2_mt");
+        lua_setmetatable(L, -2);
+
+        lua_pushnumber(L, vec.x);
+        lua_rawseti(L, -2, 1);
+        lua_pushnumber(L, vec.y);
+        lua_rawseti(L, -2, 2);
+        return 1;
+    }
+
+    inline int pushvec3_arr(lua_State* L, glm::vec3 vec) {
+        lua_createtable(L, 3, 0);
+        lua_getglobal(L, "vec3_mt");
+        lua_setmetatable(L, -2);
+
+        lua_pushnumber(L, vec.x);
+        lua_rawseti(L, -2, 1);
+        lua_pushnumber(L, vec.y);
+        lua_rawseti(L, -2, 2);
+        lua_pushnumber(L, vec.z);
+        lua_rawseti(L, -2, 3);
+        return 1;
+    }
+
+    inline int pushvec4_arr(lua_State* L, glm::vec4 vec) {
+        lua_createtable(L, 4, 0);
+        lua_getglobal(L, "vec4_mt");
+        lua_setmetatable(L, -2);
+
+        lua_pushnumber(L, vec.x);
+        lua_rawseti(L, -2, 1);
+        lua_pushnumber(L, vec.y);
+        lua_rawseti(L, -2, 2);
+        lua_pushnumber(L, vec.z);
+        lua_rawseti(L, -2, 3);
+        lua_pushnumber(L, vec.w);
+        lua_rawseti(L, -2, 4);
+        return 1;
+    }
+
+    inline int pushcolor_arr(lua_State* L, glm::vec4 vec) {
+        lua_createtable(L, 4, 0);
+        lua_getglobal(L, "color_mt");
+        lua_setmetatable(L, -2);
+
+        lua_pushinteger(L, vec.x*255);
+        lua_rawseti(L, -2, 1);
+        lua_pushinteger(L, vec.y*255);
+        lua_rawseti(L, -2, 2);
+        lua_pushinteger(L, vec.z*255);
+        lua_rawseti(L, -2, 3);
+        lua_pushinteger(L, vec.w*255);
+        lua_rawseti(L, -2, 4);
+        return 1;
+    }
 }
 
 #endif // LOGIC_SCRIPTING_LUA_UTIL_H_

src/logic/scripting/scripting.cpp

@@ -16,6 +16,7 @@
 #include "../../engine.h"
 #include "LuaState.h"
 #include "../../util/stringutil.h"
+#include "../../util/timeutil.h"
 
 using namespace scripting;
 
@@ -245,6 +246,7 @@ bool scripting::on_item_break_block(Player* player, const ItemDef* item, int x,
 }
 
 void scripting::on_ui_open(UiDocument* layout, Inventory* inventory) {
+    timeutil::ScopeLogTimer log(555);
     std::string name = layout->getId()+".open";
     if (state->getglobal(name)) {
         state->pushinteger(inventory->getId());