aura: A few changes to have aura_demo compile and run on linux.

aura/desktop_host_linux.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 "aura/desktop_host.h"
 
 #include "aura/desktop.h"
+#include "aura/event.h"
 #include "base/message_loop.h"
 #include "base/message_pump_x.h"
 
 #include <X11/Xlib.h>
 
 namespace aura {
 
 namespace {
 
 class DesktopHostLinux : public DesktopHost {
  public:
   explicit DesktopHostLinux(const gfx::Rect& bounds);
   virtual ~DesktopHostLinux();
 
  private:
   // base::MessageLoop::Dispatcher Override.
   virtual DispatchStatus Dispatch(XEvent* xev) OVERRIDE;
 
   // DesktopHost Overrides.
   virtual void SetDesktop(Desktop* desktop) OVERRIDE;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual gfx::Size GetSize() OVERRIDE;
+  virtual void SetSize(const gfx::Size& size) OVERRIDE;
 
   Desktop* desktop_;
 
   // The display and the native X window hosting the desktop.
   Display* xdisplay_;
   ::Window xwindow_;
 
   // The size of |xwindow_|.
   gfx::Rect bounds_;
 
@@ skipping 20 matching lines @@
   XSelectInput(xdisplay_, xwindow_, event_mask);
   XFlush(xdisplay_);
 }
 
 DesktopHostLinux::~DesktopHostLinux() {
   XDestroyWindow(xdisplay_, xwindow_);
 }
 
 base::MessagePumpDispatcher::DispatchStatus DesktopHostLinux::Dispatch(
     XEvent* xev) {
-  // TODO(sad): Create events and dispatch to the appropriate window.
+  bool handled = false;
   switch (xev->type) {
     case Expose:
       desktop_->Draw();
+      handled = true;
       break;
+    case KeyPress:
+    case KeyRelease: {
+      KeyEvent keyev(xev);
+      handled = desktop_->OnKeyEvent(keyev);
+      break;
+    }
+    case ButtonPress:
+    case ButtonRelease:
+    case MotionNotify: {
+      MouseEvent mouseev(xev);
+      handled = desktop_->OnMouseEvent(mouseev);
+      break;
+    }
   }
-  return EVENT_IGNORED;
+  return handled ? EVENT_PROCESSED : EVENT_IGNORED;
 }
 
 void DesktopHostLinux::SetDesktop(Desktop* desktop) {
   desktop_ = desktop;
 }
 
 gfx::AcceleratedWidget DesktopHostLinux::GetAcceleratedWidget() {
   return xwindow_;
 }
 
 void DesktopHostLinux::Show() {
 }
 
 gfx::Size DesktopHostLinux::GetSize() {
   return bounds_.size();
 }
 
+void DesktopHostLinux::SetSize(const gfx::Size& size) {
+  XResizeWindow(xdisplay_, xwindow_, size.width(), size.height());
+}
+
 }  // namespace
 
 // static
 DesktopHost* DesktopHost::Create(const gfx::Rect& bounds) {
   return new DesktopHostLinux(bounds);
 }
 
 }  // namespace aura