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During multi-step text input composing, such as with Chinese, Japanese, and Korean text input, the framework sends embedders cursor rect updates in the form of two messages: * TextInput.setMarkedTextRect: notifies the embedder the size and position of the composing text rect (or cursor when not composing) in local coordinates. * TextInput.setEditableSizeAndTransform: notifies the embedder of the size of the EditableText and 4x4 transform matrix from local to PipelineOwner.rootNode coordinates. On receipt of either message, we cache a local copy on the TextInputPlugin and notify the Win32FlutterWindow of the updated cursor rect. In a followup patch, we update Win32FlutterWindow to implement the Win32 input manager (IMM) calls required to position the IME candidates window while editing.
22 lines
697 B
C++
22 lines
697 B
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_DELEGATE_H_
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#define FLUTTER_SHELL_PLATFORM_WINDOWS_TEXT_INPUT_PLUGIN_DELEGATE_H_
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#include "flutter/shell/platform/common/cpp/geometry.h"
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#include "flutter/shell/platform/embedder/embedder.h"
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namespace flutter {
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class TextInputPluginDelegate {
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public:
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// Notifies delegate that the cursor position has changed.
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virtual void OnCursorRectUpdated(const Rect& rect) = 0;
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};
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} // namespace flutter
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#endif // FLUTTER_SHELL_PLATFORM_WINDOWS_TEXT_INPUT_PLUGIN_DELEGATE_H_
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