Implement SetViewContents in the client lib

mojo/services/native_viewport/native_viewport_win.cc

 // Copyright 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 "mojo/services/native_viewport/native_viewport.h"
 
 #include "ui/events/event.h"
 #include "ui/gfx/win/msg_util.h"
 #include "ui/gfx/win/window_impl.h"
 
 namespace mojo {
 namespace services {
 namespace {
 
 gfx::Rect GetWindowBoundsForClientBounds(DWORD style, DWORD ex_style,
                                          const gfx::Rect& bounds) {
   RECT wr;
   wr.left = bounds.x();
   wr.top = bounds.y();
   wr.right = bounds.x() + bounds.width();
   wr.bottom = bounds.y() + bounds.height();
   AdjustWindowRectEx(&wr, style, FALSE, ex_style);
-  return gfx::Rect(wr.left, wr.top, wr.right - wr.left, wr.bottom - wr.top);
+
+  // Make sure to keep the window onscreen, as AdjustWindowRectEx() may have
+  // moved part of it offscreen.
+  gfx::Rect window_bounds(wr.left, wr.top,
+                          wr.right - wr.left, wr.bottom - wr.top);
+  window_bounds.set_x(std::max(0, window_bounds.x()));
+  window_bounds.set_y(std::max(0, window_bounds.y()));
+  return window_bounds;
 }
 
 }
 
 class NativeViewportWin : public gfx::WindowImpl,
                           public NativeViewport {
  public:
   explicit NativeViewportWin(NativeViewportDelegate* delegate)
       : delegate_(delegate) {
   }
@@ skipping 114 matching lines @@
 
 // static
 scoped_ptr<NativeViewport> NativeViewport::Create(
     shell::Context* context,
     NativeViewportDelegate* delegate) {
   return scoped_ptr<NativeViewport>(new NativeViewportWin(delegate)).Pass();
 }
 
 }  // namespace services
 }  // namespace mojo