Add window manager component.

wm/host/foreign_window_host_linux.cc

+// Copyright (c) 2013 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 "wm/host/foreign_window_host_linux.h"
+
+#include <X11/extensions/Xdamage.h>
+
+#include "wm/host/foreign_window_host_delegate.h"
+
+namespace wm {
+
+ForeignWindowHostLinux::ForeignWindowHostLinux(
+    gfx::PluginWindowHandle window_handle) :
+    xdisplay_(base::MessagePumpAuraX11::GetDefaultXDisplay()),
+    window_handle_(window_handle),
+    delegate_(NULL) {
+  DCHECK(window_handle_);
+  // Damage resource is automatically freed when the window is destroyed or
+  // we close our connection to the X server.
+  // TODO(reveman): Ignore possible X error.
+  XDamageCreate(xdisplay_, window_handle_, XDamageReportRawRectangles);
+  base::MessagePumpAuraX11::Current()->AddDispatcherForWindow(
+      this, window_handle_);
+}
+
+ForeignWindowHostLinux::~ForeignWindowHostLinux() {
+  if (window_handle_) {
+    base::MessagePumpAuraX11::Current()->RemoveDispatcherForWindow(
+        window_handle_);
+  }
+}
+
+void ForeignWindowHostLinux::SetDelegate(ForeignWindowHostDelegate* delegate) {
+  DCHECK(!delegate_);
+  delegate_ = delegate;
+}
+
+gfx::PluginWindowHandle ForeignWindowHostLinux::GetWindowHandle() const {
+  return window_handle_;
+}
+
+void ForeignWindowHostLinux::Close() {
+  DCHECK(window_handle_);
+  // TODO(reveman): Close managed window by sending a client message.
+}
+
+void ForeignWindowHostLinux::OnWindowDestroyed() {
+  DCHECK(window_handle_);
+  base::MessagePumpAuraX11::Current()->RemoveDispatcherForWindow(
+      window_handle_);
+  window_handle_ = 0;
+}
+
+bool ForeignWindowHostLinux::Dispatch(const base::NativeEvent& event) {
+  DCHECK(window_handle_);
+  // TODO(reveman): Only schedule repaint of the area that was damaged.
+  delegate_->OnWindowContentsChanged();
+  return true;
+}
+
+// static
+ForeignWindowHost* ForeignWindowHost::Create(
+    gfx::PluginWindowHandle window_handle) {
+  return new ForeignWindowHostLinux(window_handle);
+}
+
+}  // namespace wm