fix document global for external Lua scripts in designer and Android

test-apps/com.mosis.sandbox-test/app.lua

@@ -3,34 +3,11 @@
 
 local results = {}
 local logCounter = 0
-local currentDocument = nil  -- Cache the document reference
 
--- Helper to get document (try multiple methods)
+-- Helper to get document (use global set by C++)
 local function getDocument()
-    -- First try the cached document
-    if currentDocument then
-        return currentDocument
-    end
-    -- Try the global document
-    if document then
-        currentDocument = document
-        return document
-    end
-    -- Try to get from RmlUi context (our context is named "default")
-    if rmlui and rmlui.contexts then
-        -- Try both "default" and "main" context names
-        local ctx = rmlui.contexts["default"] or rmlui.contexts.main
-        if ctx and ctx.documents then
-            -- documents is a proxy, iterate to get first doc
-            for i, doc in ipairs(ctx.documents) do
-                if doc then
-                    currentDocument = doc
-                    return currentDocument
-                end
-            end
-        end
-    end
-    return nil
+    -- The C++ code sets 'document' global after loading
+    return document
 end
 
 local function log(msg)
@@ -241,10 +218,6 @@ function testStorage()
     end
 end
 
--- Initialize: cache the document when script loads
-if document then
-    currentDocument = document
-    print("[LUA] Document cached on load")
-end
+-- Initialize
 log("Sandbox Test App loaded")
 log("Lua version: " .. (_VERSION or "unknown"))