A NativeViewHostViews class for embedding views inside NativeHostView instances.

views/controls/native/native_view_host.cc

 // Copyright (c) 2009 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 "views/controls/native/native_view_host.h"
 
 #include "base/logging.h"
 #include "gfx/canvas.h"
 #include "views/controls/native/native_view_host_wrapper.h"
+#include "views/controls/native/native_view_host_views.h"
 #include "views/widget/root_view.h"
 #include "views/widget/widget.h"
 
 namespace views {
 
 // static
 const char NativeViewHost::kViewClassName[] = "views/NativeViewHost";
 
 #if defined(OS_LINUX)
 // GTK renders the focus.
 // static
 const bool NativeViewHost::kRenderNativeControlFocus = false;
 #else
 // static
 const bool NativeViewHost::kRenderNativeControlFocus = true;
 #endif
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeViewHost, public:
 
 NativeViewHost::NativeViewHost()
     : native_view_(NULL),
+      views_view_(NULL),
       fast_resize_(false),
       focus_view_(NULL) {
   // The native widget is placed relative to the root. As such, we need to
   // know when the position of any ancestor changes, or our visibility relative
   // to other views changed as it'll effect our position relative to the root.
   SetNotifyWhenVisibleBoundsInRootChanges(true);
 }
 
 NativeViewHost::~NativeViewHost() {
 }
 
 void NativeViewHost::Attach(gfx::NativeView native_view) {
   DCHECK(native_view);
   DCHECK(!native_view_);
+  DCHECK(!views_view_);
   native_view_ = native_view;
   // If set_focus_view() has not been invoked, this view is the one that should
   // be seen as focused when the native view receives focus.
   if (!focus_view_)
     focus_view_ = this;
   native_wrapper_->NativeViewAttached();
 }
 
+void NativeViewHost::AttachToView(View* view) {
+  if (view == views_view_)
+    return;
+  DCHECK(view);
+  DCHECK(!native_view_);
+  DCHECK(!views_view_);
+  native_wrapper_.reset(new NativeViewHostViews(this));
+  views_view_ = view;
+  // If set_focus_view() has not been invoked, this view is the one that should
+  // be seen as focused when the native view receives focus.
+  if (!focus_view_)
+    focus_view_ = this;
+  native_wrapper_->NativeViewAttached();
+}
+
 void NativeViewHost::Detach() {
   Detach(false);
 }
 
 void NativeViewHost::SetPreferredSize(const gfx::Size& size) {
   preferred_size_ = size;
   PreferredSizeChanged();
 }
 
 void NativeViewHost::NativeViewDestroyed() {
   // Detach so we can clear our state and notify the native_wrapper_ to release
   // ref on the native view.
   Detach(true);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeViewHost, View overrides:
 
 gfx::Size NativeViewHost::GetPreferredSize() {
   return preferred_size_;
 }
 
 void NativeViewHost::Layout() {
-  if (!native_view_ || !native_wrapper_.get())
+  if ((!native_view_ && !views_view_) || !native_wrapper_.get())
     return;
 
   gfx::Rect vis_bounds = GetVisibleBounds();
   bool visible = !vis_bounds.IsEmpty();
 
   if (visible && !fast_resize_) {
     if (vis_bounds.size() != size()) {
       // Only a portion of the Widget is really visible.
       int x = vis_bounds.x();
       int y = vis_bounds.y();
@@ skipping 69 matching lines @@
   return kViewClassName;
 }
 
 void NativeViewHost::Focus() {
   native_wrapper_->SetFocus();
 }
 
 bool NativeViewHost::ContainsNativeView(gfx::NativeView native_view) const {
   if (native_view == native_view_)
     return true;
+  if (!native_view_)
+    return false;
 
   views::Widget* native_widget =
       views::Widget::GetWidgetFromNativeView(native_view_);
   views::RootView* root_view =
       native_widget ? native_widget->GetRootView() : NULL;
   if (root_view && root_view->ContainsNativeView(native_view))
     return true;
 
   return View::ContainsNativeView(native_view);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeViewHost, private:
 
 void NativeViewHost::Detach(bool destroyed) {
-  DCHECK(native_view_);
+  DCHECK(native_view_ || views_view_);
   native_wrapper_->NativeViewDetaching(destroyed);
   native_view_ = NULL;
+  views_view_ = NULL;
 }
 
 }  // namespace views