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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_INPUT_TOUCH_EVENT_STREAM_VALIDATOR_H_
#define COMPONENTS_INPUT_TOUCH_EVENT_STREAM_VALIDATOR_H_
#include <string>
#include "base/component_export.h"
#include "third_party/blink/public/common/input/web_touch_event.h"
namespace input {
// Utility class for validating a stream of WebTouchEvents.
class COMPONENT_EXPORT(INPUT) TouchEventStreamValidator {
public:
TouchEventStreamValidator();
TouchEventStreamValidator(const TouchEventStreamValidator&) = delete;
TouchEventStreamValidator& operator=(const TouchEventStreamValidator&) =
delete;
~TouchEventStreamValidator();
// If |event| is valid for the current stream, returns true.
// Otherwise, returns false with a corresponding error message.
bool Validate(const blink::WebTouchEvent& event, std::string* error_msg);
private:
blink::WebTouchEvent previous_event_;
};
} // namespace input
#endif // COMPONENTS_INPUT_TOUCH_EVENT_STREAM_VALIDATOR_H_