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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "remoting/protocol/mouse_input_filter.h"
- #include <algorithm>
- #include "base/cxx17_backports.h"
- #include "base/logging.h"
- #include "remoting/base/logging.h"
- #include "remoting/proto/event.pb.h"
- namespace remoting {
- namespace protocol {
- MouseInputFilter::MouseInputFilter() = default;
- MouseInputFilter::MouseInputFilter(InputStub* input_stub)
- : InputFilter(input_stub) {}
- MouseInputFilter::~MouseInputFilter() = default;
- void MouseInputFilter::InjectMouseEvent(const MouseEvent& event) {
- if (input_bounds_.is_zero() || output_bounds_.is_zero()) {
- return;
- }
- // We scale based on the max input and output coordinates (which are equal
- // to size-1), rather than the input and output sizes, so that it's possible
- // to reach the edge of the output when up-scaling. We also take care to
- // round up or down correctly, which is important when down-scaling.
- // After scaling, we offset by the output rect origin. This is normally
- // (0,0), but may be non-zero when there are multiple displays and we are
- // showing a single display.
- MouseEvent out_event(event);
- if (out_event.has_x()) {
- out_event.set_x(output_offset_.x() + GetScaledX(out_event.x()));
- }
- if (out_event.has_y()) {
- out_event.set_y(output_offset_.y() + GetScaledY(out_event.y()));
- }
- InputFilter::InjectMouseEvent(out_event);
- }
- void MouseInputFilter::set_input_size(const int32_t x, const int32_t y) {
- input_bounds_ = webrtc::DesktopVector(std::max(x - 1, 0), std::max(y - 1, 0));
- HOST_LOG << "Setting MouseInputFilter input boundary to " << input_bounds_.x()
- << "," << input_bounds_.y();
- }
- void MouseInputFilter::set_output_size(const int32_t x, const int32_t y) {
- output_bounds_ =
- webrtc::DesktopVector(std::max(x - 1, 0), std::max(y - 1, 0));
- HOST_LOG << "Setting MouseInputFilter output boundary to "
- << output_bounds_.x() << "," << output_bounds_.y();
- }
- void MouseInputFilter::set_output_offset(const webrtc::DesktopVector& v) {
- output_offset_ = webrtc::DesktopVector(v.x(), v.y());
- HOST_LOG << "Setting MouseInputFilter output_offset to " << output_offset_.x()
- << "," << output_offset_.y();
- }
- int32_t MouseInputFilter::GetScaledX(int32_t x) {
- if (output_bounds_.x() != input_bounds_.x()) {
- x = ((x * output_bounds_.x()) + (input_bounds_.x() / 2)) /
- input_bounds_.x();
- }
- return base::clamp(x, 0, output_bounds_.x());
- }
- int32_t MouseInputFilter::GetScaledY(int32_t y) {
- if (output_bounds_.y() != input_bounds_.y()) {
- y = ((y * output_bounds_.y()) + (input_bounds_.y() / 2)) /
- input_bounds_.y();
- }
- return base::clamp(y, 0, output_bounds_.y());
- }
- } // namespace protocol
- } // namespace remoting
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