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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_SHELL_PLATFORM_WINDOWS_KEYBOARD_HOOK_HANDLER_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_KEYBOARD_HOOK_HANDLER_H_
#include <string>
namespace flutter {
// Interface for classes that handles keyboard input events.
//
// Keyboard handlers are added to |FlutterWindowsView| in a chain.
// When a key event arrives, |KeyboardHook| is called on each handler
// until the first one that returns true. Then the proper text hooks
// are called on each handler.
class KeyboardHandlerBase {
public:
using KeyEventCallback = std::function<void(bool)>;
virtual ~KeyboardHandlerBase() = default;
// A function for hooking into keyboard input.
virtual void KeyboardHook(int key,
int scancode,
int action,
char32_t character,
bool extended,
bool was_down,
KeyEventCallback callback) = 0;
};
} // namespace flutter
#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_KEYBOARD_HOOK_HANDLER_H_