1 files changed, 69 insertions, 0 deletions
diff --git a/include/cru/ui/style/Condition.hpp b/include/cru/ui/style/Condition.hpp
new file mode 100644
index 00000000..b88a338f
--- /dev/null
+++ b/include/cru/ui/style/Condition.hpp
@@ -0,0 +1,69 @@
+#pragma once
+#include "../Base.hpp"
+#include "cru/common/Base.hpp"
+#include "cru/common/Event.hpp"
+#include "cru/ui/controls/IClickableControl.hpp"
+#include "cru/ui/helper/ClickDetector.hpp"
+
+#include <type_traits>
+#include <utility>
+#include <vector>
+
+namespace cru::ui::style {
+class Condition {
+ public:
+  virtual ~Condition() = default;
+
+  virtual std::vector<IBaseEvent*> ChangeOn(
+      controls::Control* control) const = 0;
+  virtual bool Judge(controls::Control* control) const = 0;
+};
+
+class CompoundCondition : public Condition {
+ public:
+  explicit CompoundCondition(std::vector<Condition*> conditions);
+
+  const std::vector<Condition*>& GetConditions() const { return conditions_; }
+
+  std::vector<IBaseEvent*> ChangeOn(controls::Control* control) const override;
+
+ private:
+  std::vector<Condition*> conditions_;
+};
+
+class AndCondition : public CompoundCondition {
+ public:
+  using CompoundCondition::CompoundCondition;
+
+  bool Judge(controls::Control* control) const override;
+};
+
+class OrCondition : public CompoundCondition {
+ public:
+  using CompoundCondition::CompoundCondition;
+
+  bool Judge(controls::Control* control) const override;
+};
+
+class FocusCondition : public Condition {
+ public:
+  explicit FocusCondition(bool has_focus);
+
+  std::vector<IBaseEvent*> ChangeOn(controls::Control* control) const override;
+  bool Judge(controls::Control* control) const override;
+
+ private:
+  bool has_focus_;
+};
+
+class ClickStateCondition : public Condition {
+ public:
+  explicit ClickStateCondition(helper::ClickState click_state);
+
+  std::vector<IBaseEvent*> ChangeOn(controls::Control* control) const override;
+  bool Judge(controls::Control* control) const override;
+
+ private:
+  helper::ClickState click_state_;
+};
+}  // namespace cru::ui::style