third_party/blink/public/web/web_scoped_user_gesture.h

/*
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#ifndef THIRD_PARTY_BLINK_PUBLIC_WEB_WEB_SCOPED_USER_GESTURE_H_
#define THIRD_PARTY_BLINK_PUBLIC_WEB_WEB_SCOPED_USER_GESTURE_H_

#include <memory>
#include "third_party/blink/public/platform/web_common.h"

namespace blink {

class UserGestureIndicator;
class WebLocalFrame;
class WebUserGestureToken;

// An instance of this class, while kept alive, will indicate that we are in
// the context of a known user gesture. To use, create one, perform whatever
// actions were done under color of a known user gesture, and then delete it.
// Usually this will be done on the stack.
//
// SECURITY WARNING: Do not create several instances of this class for the same
// user gesture. Doing so might enable malicious code to work around certain
// restrictions such as opening multiple windows.
// Instead, obtain the current WebUserGestureToken from the
// WebUserGestureIndicator, and use this token to create a
// WebScopedUserGesture. If the token was alrady consumed, the new
// WebScopedUserGesture will not indicate that we are in the context of a user
// gesture.
class WebScopedUserGesture {
 public:
  BLINK_EXPORT explicit WebScopedUserGesture(const WebUserGestureToken& token);
  BLINK_EXPORT WebScopedUserGesture(WebLocalFrame*);
  BLINK_EXPORT ~WebScopedUserGesture();

 private:
  std::unique_ptr<UserGestureIndicator> indicator_;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_PUBLIC_WEB_WEB_SCOPED_USER_GESTURE_H_