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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.
100 lines
3.6 KiB
C++
100 lines
3.6 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_TEXT_INPUT_PLUGIN_H_
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#define FLUTTER_SHELL_PLATFORM_WINDOWS_TEXT_INPUT_PLUGIN_H_
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#include <array>
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#include <map>
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#include <memory>
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#include "flutter/shell/platform/common/cpp/client_wrapper/include/flutter/binary_messenger.h"
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#include "flutter/shell/platform/common/cpp/client_wrapper/include/flutter/method_channel.h"
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#include "flutter/shell/platform/common/cpp/geometry.h"
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#include "flutter/shell/platform/common/cpp/json_method_codec.h"
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#include "flutter/shell/platform/common/cpp/text_input_model.h"
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#include "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 "flutter/shell/platform/windows/text_input_plugin_delegate.h"
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namespace flutter {
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class FlutterWindowsView;
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// Implements a text input plugin.
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//
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// Specifically handles window events within windows.
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class TextInputPlugin : public KeyboardHookHandler {
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public:
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explicit TextInputPlugin(flutter::BinaryMessenger* messenger,
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TextInputPluginDelegate* delegate);
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virtual ~TextInputPlugin();
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// |KeyboardHookHandler|
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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) override;
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// |KeyboardHookHandler|
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void TextHook(FlutterWindowsView* view, const std::u16string& text) override;
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private:
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// Sends the current state of the given model to the Flutter engine.
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void SendStateUpdate(const TextInputModel& model);
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// Sends an action triggered by the Enter key to the Flutter engine.
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void EnterPressed(TextInputModel* model);
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// Called when a method is called on |channel_|;
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void HandleMethodCall(
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const flutter::MethodCall<rapidjson::Document>& method_call,
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std::unique_ptr<flutter::MethodResult<rapidjson::Document>> result);
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// Returns the composing rect, or if IME composing mode is not active, the
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// cursor rect in the PipelineOwner root coordinate system.
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Rect GetCursorRect() const;
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// The MethodChannel used for communication with the Flutter engine.
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std::unique_ptr<flutter::MethodChannel<rapidjson::Document>> channel_;
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// The associated |TextInputPluginDelegate|.
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TextInputPluginDelegate* delegate_;
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// The active client id.
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int client_id_;
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// The active model. nullptr if not set.
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std::unique_ptr<TextInputModel> active_model_;
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// Keyboard type of the client. See available options:
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// https://api.flutter.dev/flutter/services/TextInputType-class.html
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std::string input_type_;
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// An action requested by the user on the input client. See available options:
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// https://api.flutter.dev/flutter/services/TextInputAction-class.html
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std::string input_action_;
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// The smallest rect, in local coordinates, of the text in the composing
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// range, or of the caret in the case where there is no current composing
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// range. This value is updated via `TextInput.setMarkedTextRect` messages
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// over the text input channel.
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Rect composing_rect_;
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// A 4x4 matrix that maps from `EditableText` local coordinates to the
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// coordinate system of `PipelineOwner.rootNode`.
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std::array<std::array<double, 4>, 4> editabletext_transform_ = {
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0.0, 0.0, 0.0, 0.0, //
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0.0, 0.0, 0.0, 0.0, //
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0.0, 0.0, 0.0, 0.0, //
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0.0, 0.0, 0.0, 0.0};
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_TEXT_INPUT_PLUGIN_H_
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