Refactoring of the client-side input pipeline and scaling dimension management.

remoting/client/mouse_input_filter.cc

+// Copyright (c) 2011 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/client/mouse_input_filter.h"
+
+#include "remoting/proto/event.pb.h"
+
+namespace remoting {
+
+MouseInputFilter::MouseInputFilter(protocol::InputStub* input_stub)
+    : input_stub_(input_stub) {
+  input_size_.setEmpty();
+  output_size_.setEmpty();
+}
+
+MouseInputFilter::~MouseInputFilter() {
+}
+
+void MouseInputFilter::InjectKeyEvent(const protocol::KeyEvent& event) {
+  input_stub_->InjectKeyEvent(event);
+}
+
+void MouseInputFilter::InjectMouseEvent(const protocol::MouseEvent& event) {
+  if (input_size_.isZero() || output_size_.isZero())
+    return;
+
+  protocol::MouseEvent out_event(event);
+  if (out_event.has_x()) {
+    int x = (out_event.x() * output_size_.width()) / input_size_.width();
+    out_event.set_x(std::max(0, std::min(output_size_.width() - 1, x)));
+  }
+  if (out_event.has_y()) {
+    int y = (out_event.y() * output_size_.height()) / input_size_.height();
+    out_event.set_y(std::max(0, std::min(output_size_.height() - 1, y)));
+  }
+
+  input_stub_->InjectMouseEvent(out_event);
+}
+
+void MouseInputFilter::set_input_size(const SkISize& size) {
+  input_size_ = size;
+}
+
+void MouseInputFilter::set_output_size(const SkISize& size) {
+  output_size_ = size;
+}
+
+}  // namespace remoting