XamlLoader.h

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#pragma once
 
#include "UI/Layout/BaseNode.h"
 
#include <cstddef>
#include <memory>
#include <string>
#include <string_view>
 
namespace z8::ui {
class ControlFactory;
class Layout;
 
struct XamlLoadResult {
  std::unique_ptr<BaseNode> Root;
  std::string Error;
  // 错误的位置
  size_t ErrorOffset = 0;
 
  // LoadInto 成功后 Root 会移交给 Layout，因此成功与否只由 Error 表示。
  explicit operator bool() const { return Error.empty(); }
};
 
class XamlLoader {
public:
  explicit XamlLoader(ControlFactory& factory);
  XamlLoader();
 
  XamlLoadResult Load(std::string_view source) const;
  XamlLoadResult LoadInto(Layout& layout, std::string_view source) const;
  XamlLoadResult LoadFileInto(Layout& layout, const std::string& fileName) const;
 
private:
  ControlFactory* Factory;
};
} // namespace z8::ui