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c8620c3fc1
This changes the Windows text handling so that keyboard events are sent to the framework first for handling, and then passed to the text input plugin, so that the framework has a chance to handle keys before they get given to the text field. This is complicated by the async nature of the interaction with the framework, since Windows wants a synchronous response. So, in this change, I always tell Windows that the event was handled, and if the framework (eventually) responds that it wasn't, then I synthesize a new event and send it with SendEvent. I also added support for detecting "extended" keys, since that was missing, and converted the OnKey handlers in the API to return a bool to indicate whether or not they have handled the event.
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef FLUTTER_SHELL_PLATFORM_WINDOWS_KEYBOARD_HOOK_HANDLER_H_
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#define FLUTTER_SHELL_PLATFORM_WINDOWS_KEYBOARD_HOOK_HANDLER_H_
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#include "flutter/shell/platform/windows/public/flutter_windows.h"
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#include <string>
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namespace flutter {
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class FlutterWindowsView;
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// Abstract class for handling keyboard input events.
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class KeyboardHookHandler {
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public:
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virtual ~KeyboardHookHandler() = default;
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// A function for hooking into keyboard input.
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//
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// Returns true if the key event has been handled, to indicate that other
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// handlers should not be called for this event.
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virtual bool KeyboardHook(FlutterWindowsView* view,
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int key,
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int scancode,
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int action,
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char32_t character,
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bool extended) = 0;
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// A function for hooking into Unicode text input.
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virtual void TextHook(FlutterWindowsView* view,
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const std::u16string& text) = 0;
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_KEYBOARD_HOOK_HANDLER_H_
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