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