TXFALayoutEngine.Create

单元：HPDFXFALayout

constructor Create(ADoc: TXFADocument; APageW, APageH: Double;
  AWarnings: TStringList; AMeasureText: TXFAMeasureTextFunc = nil;
  AResolveText: TXFAResolveLayoutTextFunc = nil; AMaxFieldItems: Integer = 0;
  AMaxLayoutOperations: Integer = 200000;
  AResolveProperty: TXFAResolveInstanceProperty = nil;
  AResolveScope: TXFAResolveInstanceScope = nil);

末尾的可选 resolver 参数增加 per-instance property 和 repeat-parent 绑定；传 nil 时保持既有调用方行为；布局引擎保持与 HPDFDoc 无关

绑定与选择器规则、支持的事件语法、预算默认值、事务式发布、持久化、绘制和兼容性边界，见 动态 XFA 实例呈现