Add core library and element classes for Basalt framework

src/libraries/colorHex.lua

@@ -0,0 +1,8 @@
+local colorHex = {}
+
+for i = 0, 15 do
+    colorHex[2^i] = ("%x"):format(i)
+    colorHex[("%x"):format(i)] = 2^i
+end
+
+return colorHex

src/libraries/expect.lua

@@ -0,0 +1,35 @@
+local errorManager = require("errorManager")
+
+-- Simple type checking without stack traces
+local function expect(position, value, expectedType)
+    local valueType = type(value)
+
+    if expectedType == "element" then
+        if valueType == "table" and value.get("type") ~= nil then
+            return true
+        end
+    end
+
+    if expectedType == "color" then
+        if valueType == "number" and value >= 1 and value <= 32768 then
+            return true
+        end
+        if valueType == "string" and colors[value] then
+            return true
+        end
+    end
+
+    if valueType ~= expectedType then
+        errorManager.header = "Basalt Type Error"
+        errorManager.error(string.format(
+            "Bad argument #%d: expected %s, got %s",
+            position,
+            expectedType,
+            valueType
+        ))
+    end
+
+    return true
+end
+
+return expect

src/libraries/utils.lua

@@ -0,0 +1,27 @@
+local floor, len = math.floor, string.len
+
+local utils = {}
+
+function utils.getCenteredPosition(text, totalWidth, totalHeight)
+    local textLength = len(text)
+
+    local x = floor((totalWidth - textLength+1) / 2 + 0.5)
+    local y = floor(totalHeight / 2 + 0.5)
+
+    return x, y
+end
+
+function utils.deepCopy(obj)
+    if type(obj) ~= "table" then
+        return obj
+    end
+
+    local copy = {}
+    for k, v in pairs(obj) do
+        copy[utils.deepCopy(k)] = utils.deepCopy(v)
+    end
+
+    return copy
+end
+
+return utils