flutter_flutter/shell/platform/windows/key_event_handler.h
shoryukenn 38d545ee17 Improve Unicode handling on Windows (#11899)
Significantly improves the behavior of non-ASCII text input on Windows. Correctly
processes incoming character events as UTF-16, and for now uses UTF-32 for
the text model so that the existing index-based logic will work much more often.

Future work is still needed, but this will handle far more cases correctly.
2019-09-08 12:13:59 -07:00

47 lines
1.5 KiB
C++

// 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_KEY_EVENT_HANDLER_H_
#define FLUTTER_SHELL_PLATFORM_WINDOWS_KEY_EVENT_HANDLER_H_
#include <memory>
#include "flutter/shell/platform/common/cpp/client_wrapper/include/flutter/basic_message_channel.h"
#include "flutter/shell/platform/common/cpp/client_wrapper/include/flutter/binary_messenger.h"
#include "flutter/shell/platform/windows/keyboard_hook_handler.h"
#include "flutter/shell/platform/windows/public/flutter_windows.h"
#include "rapidjson/document.h"
namespace flutter {
class Win32FlutterWindow;
// Implements a KeyboardHookHandler
//
// Handles key events and forwards them to the Flutter engine.
class KeyEventHandler : public KeyboardHookHandler {
public:
explicit KeyEventHandler(flutter::BinaryMessenger* messenger);
virtual ~KeyEventHandler();
// |KeyboardHookHandler|
void KeyboardHook(Win32FlutterWindow* window,
int key,
int scancode,
int action,
int mods) override;
// |KeyboardHookHandler|
void CharHook(Win32FlutterWindow* window, char32_t code_point) override;
private:
// The Flutter system channel for key event messages.
std::unique_ptr<flutter::BasicMessageChannel<rapidjson::Document>> channel_;
};
} // namespace flutter
#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_KEY_EVENT_HANDLER_H_