Cross-platform plumbing for resize-to-client

remoting/host/desktop_resizer.cc

+// 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/host/desktop_resizer.h"
+
+namespace remoting {
+
+DesktopResizer::~DesktopResizer() {
+}
+
+DesktopResizer::HostStatusObserver::HostStatusObserver(
+    DesktopResizer* desktop_resizer)
+    : desktop_resizer_(desktop_resizer),
+      original_size_(SkISize::Make(0, 0)) {
+}
+
+void DesktopResizer::HostStatusObserver::OnClientAuthenticated(
+    const std::string& jid) {
+  original_size_ = desktop_resizer_->GetSize();
+}
+
+void DesktopResizer::HostStatusObserver::OnClientDisconnected(
+    const std::string& jid) {
+  SkISize zero = SkISize::Make(0, 0);
+  if (original_size_ != zero) {
+    desktop_resizer_->SetSize(original_size_);
+    original_size_ = zero;
+  }
+}
+
+void DesktopResizer::HostStatusObserver::OnClientDimensionsChanged(
+    const SkISize& size) {
+  // Set a sensible minimum size for the host desktop. Note that the
+  // implementation is free to impose a stricter minimum size and/or
+  // a maximum size in addition to this.
+  const int kMinWidth = 640;
+  const int kMinHeight = 480;
+  SkISize new_size(SkISize::Make(std::max(kMinWidth, size.width()),
+                                 std::max(kMinHeight, size.height())));
+  desktop_resizer_->SetSize(new_size);
+}
+
+}  // namespace remoting