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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_INPUT_STYLUS_HANDWRITING_CALLBACK_SINK_WIN_H_
#define CONTENT_BROWSER_RENDERER_HOST_INPUT_STYLUS_HANDWRITING_CALLBACK_SINK_WIN_H_
#include "base/functional/callback.h"
#include "content/browser/renderer_host/input/stylus_handwriting_controller_win.h"
namespace content {
// Handles the callback from Shell Handwriting service.
class CONTENT_EXPORT StylusHandwritingCallbackSinkWin
: public Microsoft::WRL::RuntimeClass<
Microsoft::WRL::RuntimeClassFlags<Microsoft::WRL::ClassicCom>,
::ITfHandwritingSink> {
public:
using OnFocusHandwritingTargetCallback =
StylusHandwritingControllerWin::OnFocusHandwritingTargetCallback;
// The constructor is public for `MakeAndInitialize` and should not be called
// directly.
StylusHandwritingCallbackSinkWin();
StylusHandwritingCallbackSinkWin(const StylusHandwritingCallbackSinkWin&) =
delete;
StylusHandwritingCallbackSinkWin& operator=(
const StylusHandwritingCallbackSinkWin&) = delete;
~StylusHandwritingCallbackSinkWin() override;
// Called during `MakeAndInitialize`.
HRESULT STDMETHODCALLTYPE RuntimeClassInitialize();
// ITfHandwritingSink:
HRESULT STDMETHODCALLTYPE DetermineProximateHandwritingTarget(
::ITfDetermineProximateHandwritingTargetArgs* args) override;
// ITfHandwritingSink:
HRESULT STDMETHODCALLTYPE
FocusHandwritingTarget(::ITfFocusHandwritingTargetArgs* args) override;
void SetCallback(OnFocusHandwritingTargetCallback callback) {
handwriting_callback_ = std::move(callback);
}
void OnFocusHandled();
void OnFocusFailed();
private:
// Stores the callback to request setting the renderer focus based on the
// target area of the pointer input and the distance threshold.
OnFocusHandwritingTargetCallback handwriting_callback_;
// The ITfSource interface is implemented by the TSF manager obtained from the
// ITfThreadMgr instance. Used to install and uninstall the ITfHandwritingSink
// so Shell Handwriting can call this controller instance, in particular
// FocusHandwritingTarget to set the target focus.
Microsoft::WRL::ComPtr<ITfSource> source_;
// Args passed during FocusHandwritingTarget() call by Shell Handwriting
// which help to retrieve pointer input details and specify the response
// about focus handling back to Shell Handwriting.
Microsoft::WRL::ComPtr<::ITfFocusHandwritingTargetArgs> pending_target_args_;
// Stores the address of a DWORD valued used to correctly uninstall the advise
// sink on the object destruction.
DWORD sink_cookie_ = TF_INVALID_COOKIE;
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_INPUT_STYLUS_HANDWRITING_CALLBACK_SINK_WIN_H_
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