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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/protocol/fractional_input_filter.h"
#include <algorithm>
#include "base/check.h"
#include "remoting/proto/event.pb.h"
namespace remoting::protocol {
FractionalInputFilter::FractionalInputFilter(
InputStub* input_stub,
const CoordinateConverter* converter)
: InputFilter(input_stub), converter_(converter) {
DCHECK(converter_);
}
FractionalInputFilter::~FractionalInputFilter() = default;
void FractionalInputFilter::InjectMouseEvent(const MouseEvent& event) {
if (!event.has_fractional_coordinate()) {
InputFilter::InjectMouseEvent(event);
return;
}
auto result =
converter_->ToGlobalAbsoluteCoordinate(event.fractional_coordinate());
if (result) {
MouseEvent new_event(event);
new_event.set_x(result->x());
new_event.set_y(result->y());
InputFilter::InjectMouseEvent(new_event);
}
}
void FractionalInputFilter::InjectTouchEvent(const TouchEvent& event) {
// Copy the event, so it can be mutated. This could be optimized for cases
// where mutation is not needed. But in the longer term, the TouchEvents will
// all have fractional coordinates, and then a copy is needed anyway.
TouchEvent new_event(event);
for (TouchEventPoint& touch_point : *(new_event.mutable_touch_points())) {
// Events with no fractional-coordinates should be passed through unchanged.
if (touch_point.has_fractional_coordinate()) {
auto result = converter_->ToGlobalAbsoluteCoordinate(
touch_point.fractional_coordinate());
if (!result) {
// A fractional coordinate was found, but the calculation failed, so
// drop the event completely. ComputeXY() will already log a failure in
// this case.
return;
}
touch_point.set_x(result->x());
touch_point.set_y(result->y());
}
}
InputFilter::InjectTouchEvent(new_event);
}
} // namespace remoting::protocol
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