Add support for child and popup windows in OSR

atom/browser/api/atom_api_web_contents.cc

@@ -48,6 +48,7 @@
 #include "chrome/browser/ssl/security_state_tab_helper.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
+#include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/favicon_status.h"
@@ -315,6 +316,9 @@ WebContents::WebContents(v8::Isolate* isolate, const mate::Dictionary& options)
   else if (options.Get("offscreen", &b) && b)
     type_ = OFF_SCREEN;
 
+  // Init embedder earlier
+  options.Get("embedder", &embedder_);
+
   // Whether to enable DevTools.
   options.Get("devTools", &enable_devtools_);
 
@@ -339,7 +343,18 @@ WebContents::WebContents(v8::Isolate* isolate, const mate::Dictionary& options)
         session->browser_context(), site_instance);
     guest_delegate_.reset(new WebViewGuestDelegate);
     params.guest_delegate = guest_delegate_.get();
+    
+    if (embedder_ && embedder_->IsOffScreen()) {
+      auto* view = new OffScreenWebContentsView(false, 
+          base::Bind(&WebContents::OnPaint, base::Unretained(this)));
+      params.view = view;
+      params.delegate_view = view;
+      
       web_contents = content::WebContents::Create(params);
+      view->SetWebContents(web_contents);
+    } else {
+      web_contents = content::WebContents::Create(params);
+    }
   } else if (IsOffScreen()) {
     bool transparent = false;
     options.Get("transparent", &transparent);
@@ -389,7 +404,7 @@ void WebContents::InitWithSessionAndOptions(v8::Isolate* isolate,
     guest_delegate_->Initialize(this);
 
     NativeWindow* owner_window = nullptr;
-    if (options.Get("embedder", &embedder_) && embedder_) {
+    if (embedder_) {
       // New WebContents's owner_window is the embedder's owner_window.
       auto relay =
           NativeWindowRelay::FromWebContents(embedder_->web_contents());
@@ -1402,18 +1417,16 @@ bool WebContents::SendIPCMessage(bool all_frames,
 
 void WebContents::SendInputEvent(v8::Isolate* isolate,
                                  v8::Local<v8::Value> input_event) {
-  const auto view = web_contents()->GetRenderWidgetHostView();
+  const auto view = static_cast<content::RenderWidgetHostViewBase*>(
+    web_contents()->GetRenderWidgetHostView());
   if (!view)
     return;
-  const auto host = view->GetRenderWidgetHost();
-  if (!host)
-    return;
 
   int type = mate::GetWebInputEventType(isolate, input_event);
   if (blink::WebInputEvent::isMouseEventType(type)) {
     blink::WebMouseEvent mouse_event;
     if (mate::ConvertFromV8(isolate, input_event, &mouse_event)) {
-      host->ForwardMouseEvent(mouse_event);
+      view->ProcessMouseEvent(mouse_event, ui::LatencyInfo());
       return;
     }
   } else if (blink::WebInputEvent::isKeyboardEventType(type)) {
@@ -1422,13 +1435,13 @@ void WebContents::SendInputEvent(v8::Isolate* isolate,
         blink::WebInputEvent::NoModifiers,
         ui::EventTimeForNow());
     if (mate::ConvertFromV8(isolate, input_event, &keyboard_event)) {
-      host->ForwardKeyboardEvent(keyboard_event);
+      view->ProcessKeyboardEvent(keyboard_event);
       return;
     }
   } else if (type == blink::WebInputEvent::MouseWheel) {
     blink::WebMouseWheelEvent mouse_wheel_event;
     if (mate::ConvertFromV8(isolate, input_event, &mouse_wheel_event)) {
-      host->ForwardWheelEvent(mouse_wheel_event);
+      view->ProcessMouseEvent(mouse_wheel_event, ui::LatencyInfo());
       return;
     }
   }
@@ -1631,6 +1644,16 @@ void WebContents::Invalidate() {
   }
 }
 
+gfx::Size WebContents::GetSizeForNewRenderView(
+    content::WebContents* web_contents) const {
+  auto relay = NativeWindowRelay::FromWebContents(web_contents);
+  if (relay) {
+    return relay->window->GetSize();
+  }
+  
+  return gfx::Size();
+}
+
 void WebContents::SetZoomLevel(double level) {
   zoom_controller_->SetZoomLevel(level);
 }

atom/browser/api/atom_api_web_contents.h

@@ -183,6 +183,7 @@ class WebContents : public mate::TrackableObject<WebContents>,
   void SetFrameRate(int frame_rate);
   int GetFrameRate() const;
   void Invalidate();
+  gfx::Size GetSizeForNewRenderView(content::WebContents*) const override;
 
   // Methods for zoom handling.
   void SetZoomLevel(double level);

atom/browser/native_window.h

@@ -147,6 +147,7 @@ class NativeWindow : public base::SupportsUserData,
   virtual void SetMenu(AtomMenuModel* menu);
   virtual void SetParentWindow(NativeWindow* parent);
   virtual void SetBrowserView(NativeBrowserView* browser_view) = 0;
+  virtual gfx::NativeView GetNativeView() = 0;
   virtual gfx::NativeWindow GetNativeWindow() = 0;
   virtual gfx::AcceleratedWidget GetAcceleratedWidget() = 0;
 

atom/browser/native_window_views.cc

@@ -924,6 +924,10 @@ void NativeWindowViews::SetParentWindow(NativeWindow* parent) {
 #endif
 }
 
+gfx::NativeView NativeWindowViews::GetNativeView() {
+  return window_->GetNativeView();
+}
+
 gfx::NativeWindow NativeWindowViews::GetNativeWindow() {
   return window_->GetNativeWindow();
 }

atom/browser/native_window_views.h

@@ -106,6 +106,7 @@ class NativeWindowViews : public NativeWindow,
   void SetMenu(AtomMenuModel* menu_model) override;
   void SetBrowserView(NativeBrowserView* browser_view) override;
   void SetParentWindow(NativeWindow* parent) override;
+  gfx::NativeView GetNativeView() override;
   gfx::NativeWindow GetNativeWindow() override;
   void SetOverlayIcon(const gfx::Image& overlay,
                       const std::string& description) override;

atom/browser/osr/osr_render_widget_host_view.cc

@@ -17,6 +17,7 @@
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_frame_subscriber.h"
+#include "content/browser/renderer_host/resize_lock.h"
 #include "content/common/view_messages.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/context_factory.h"
@@ -25,6 +26,7 @@
 #include "ui/compositor/layer.h"
 #include "ui/compositor/layer_type.h"
 #include "ui/events/latency_info.h"
+#include "ui/gfx/skbitmap_operations.h"
 #include "ui/gfx/geometry/dip_util.h"
 #include "ui/gfx/native_widget_types.h"
 
@@ -35,6 +37,66 @@ namespace {
 const float kDefaultScaleFactor = 1.0;
 const int kFrameRetryLimit = 2;
 
+#if !defined(OS_MACOSX)
+
+const int kResizeLockTimeoutMs = 67;
+
+class AtomResizeLock : public content::ResizeLock {
+ public:
+  AtomResizeLock(OffScreenRenderWidgetHostView* host,
+                const gfx::Size new_size,
+                bool defer_compositor_lock)
+      : ResizeLock(new_size, defer_compositor_lock),
+        host_(host),
+        cancelled_(false),
+        weak_ptr_factory_(this) {
+    DCHECK(host_);
+    host_->HoldResize();
+
+    content::BrowserThread::PostDelayedTask(content::BrowserThread::UI, 
+      FROM_HERE, base::Bind(&AtomResizeLock::CancelLock,
+        weak_ptr_factory_.GetWeakPtr()), 
+        base::TimeDelta::FromMilliseconds(kResizeLockTimeoutMs));
+  }
+
+  ~AtomResizeLock() override {
+    CancelLock();
+  }
+
+  bool GrabDeferredLock() override {
+    return ResizeLock::GrabDeferredLock();
+  }
+
+  void UnlockCompositor() override {
+    ResizeLock::UnlockCompositor();
+    compositor_lock_ = NULL;
+  }
+
+ protected:
+  void LockCompositor() override {
+    ResizeLock::LockCompositor();
+    compositor_lock_ = host_->GetCompositor()->GetCompositorLock();
+  }
+
+  void CancelLock() {
+    if (cancelled_)
+      return;
+    cancelled_ = true;
+    UnlockCompositor();
+    host_->ReleaseResize();
+  }
+
+ private:
+  OffScreenRenderWidgetHostView* host_;
+  scoped_refptr<ui::CompositorLock> compositor_lock_;
+  bool cancelled_;
+  base::WeakPtrFactory<AtomResizeLock> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AtomResizeLock);
+};
+
+#endif  // !defined(OS_MACOSX)
+
 }  // namespace
 
 class AtomCopyFrameGenerator {
@@ -338,24 +400,30 @@ OffScreenRenderWidgetHostView::OffScreenRenderWidgetHostView(
     bool transparent,
     const OnPaintCallback& callback,
     content::RenderWidgetHost* host,
-    bool is_guest_view_hack,
+    OffScreenRenderWidgetHostView* parent_host_view,
     NativeWindow* native_window)
     : render_widget_host_(content::RenderWidgetHostImpl::From(host)),
+      parent_host_view_(parent_host_view),
+      popup_host_view_(nullptr),
+      child_host_view_(nullptr),
       native_window_(native_window),
       software_output_device_(nullptr),
       transparent_(transparent),
       callback_(callback),
+      parent_callback_(nullptr),
       frame_rate_(60),
       frame_rate_threshold_ms_(0),
       last_time_(base::Time::Now()),
       scale_factor_(kDefaultScaleFactor),
-      is_showing_(!render_widget_host_->is_hidden()),
-      size_(native_window->GetSize()),
       painting_(true),
+      is_showing_(!render_widget_host_->is_hidden()),
+      is_destroyed_(false),
+      popup_position_(gfx::Rect()),
+      hold_resize_(false),
+      pending_resize_(false),
+      size_(native_window->GetSize()),
       weak_ptr_factory_(this) {
   DCHECK(render_widget_host_);
-  render_widget_host_->SetView(this);
-
 #if !defined(OS_MACOSX)
   delegated_frame_host_ = base::MakeUnique<content::DelegatedFrameHost>(
       AllocateFrameSinkId(is_guest_view_hack), this);
@@ -383,6 +451,8 @@ OffScreenRenderWidgetHostView::OffScreenRenderWidgetHostView(
   native_window_->AddObserver(this);
 
   ResizeRootLayer();
+  render_widget_host_->SetView(this);
+  InstallTransparency();
 }
 
 OffScreenRenderWidgetHostView::~OffScreenRenderWidgetHostView() {
@@ -400,8 +470,15 @@ OffScreenRenderWidgetHostView::~OffScreenRenderWidgetHostView() {
   delegated_frame_host_->ResetCompositor();
 #endif
 
+  if (copy_frame_generator_.get())
+    copy_frame_generator_.reset(NULL);
+    
 #if defined(OS_MACOSX)
   DestroyPlatformWidget();
+#else
+  delegated_frame_host_.reset(NULL);
+  compositor_.reset(NULL);
+  root_layer_.reset(NULL);
 #endif
 }
 
@@ -461,6 +538,17 @@ bool OffScreenRenderWidgetHostView::OnMessageReceived(
 }
 
 void OffScreenRenderWidgetHostView::InitAsChild(gfx::NativeView) {
+  DCHECK(parent_host_view_);
+
+  if (parent_host_view_->child_host_view_) {
+    parent_host_view_->child_host_view_->CancelWidget();
+  }
+  
+  parent_host_view_->set_child_host_view(this);
+  parent_host_view_->Hide();
+
+  ResizeRootLayer();
+  Show();
 }
 
 content::RenderWidgetHost* OffScreenRenderWidgetHostView::GetRenderWidgetHost()
@@ -470,14 +558,11 @@ content::RenderWidgetHost* OffScreenRenderWidgetHostView::GetRenderWidgetHost()
 
 void OffScreenRenderWidgetHostView::SetSize(const gfx::Size& size) {
   size_ = size;
-
+  WasResized();
-  ResizeRootLayer();
-  if (render_widget_host_)
-    render_widget_host_->WasResized();
-  GetDelegatedFrameHost()->WasResized();
 }
 
 void OffScreenRenderWidgetHostView::SetBounds(const gfx::Rect& new_bounds) {
+  SetSize(new_bounds.size());
 }
 
 gfx::Vector2dF OffScreenRenderWidgetHostView::GetLastScrollOffset() const {
@@ -547,6 +632,9 @@ bool OffScreenRenderWidgetHostView::IsShowing() {
 }
 
 gfx::Rect OffScreenRenderWidgetHostView::GetViewBounds() const {
+  if (IsPopupWidget())
+    return popup_position_;
+
   return gfx::Rect(size_);
 }
 
@@ -587,7 +675,7 @@ void OffScreenRenderWidgetHostView::OnSwapCompositorFrame(
 
   if (!frame.render_pass_list.empty()) {
     if (software_output_device_) {
-      if (!begin_frame_timer_.get()) {
+      if (!begin_frame_timer_.get() || IsPopupWidget()) {
         software_output_device_->SetActive(painting_);
       }
 
@@ -631,6 +719,21 @@ void OffScreenRenderWidgetHostView::ClearCompositorFrame() {
 
 void OffScreenRenderWidgetHostView::InitAsPopup(
     content::RenderWidgetHostView* parent_host_view, const gfx::Rect& pos) {
+  DCHECK_EQ(parent_host_view_, parent_host_view);
+  
+  if (parent_host_view_->popup_host_view_) {
+    parent_host_view_->popup_host_view_->CancelWidget();
+  }
+  
+  parent_host_view_->set_popup_host_view(this);
+  parent_host_view_->popup_bitmap_.reset(new SkBitmap);
+  parent_callback_ = base::Bind(&OffScreenRenderWidgetHostView::OnPopupPaint,
+      parent_host_view_->weak_ptr_factory_.GetWeakPtr());
+  
+  popup_position_ = pos;
+  
+  ResizeRootLayer();
+  Show();
 }
 
 void OffScreenRenderWidgetHostView::InitAsFullscreen(
@@ -656,6 +759,23 @@ void OffScreenRenderWidgetHostView::RenderProcessGone(base::TerminationStatus,
 }
 
 void OffScreenRenderWidgetHostView::Destroy() {
+  if (!is_destroyed_) {
+    is_destroyed_ = true;
+
+    if (parent_host_view_ != NULL) {
+      CancelWidget();
+    } else {
+      if (popup_host_view_)
+        popup_host_view_->CancelWidget();
+      popup_bitmap_.reset();
+      if (child_host_view_)
+        child_host_view_->CancelWidget();
+      for (auto guest_host_view : guest_host_views_)
+        guest_host_view->CancelWidget();
+      Hide();
+    }
+  }
+  
   delete this;
 }
 
@@ -692,6 +812,13 @@ void OffScreenRenderWidgetHostView::EndFrameSubscription() {
   GetDelegatedFrameHost()->EndFrameSubscription();
 }
 
+void OffScreenRenderWidgetHostView::InitAsGuest(
+    content::RenderWidgetHostView* parent_host_view, 
+    content::RenderWidgetHostViewGuest* guest_view) {  
+  parent_host_view_->AddGuestHostView(this);
+  parent_host_view_->RegisterGuestViewFrameSwappedCallback(guest_view);
+}
+
 bool OffScreenRenderWidgetHostView::HasAcceleratedSurface(const gfx::Size &) {
   return false;
 }
@@ -705,11 +832,11 @@ void OffScreenRenderWidgetHostView::ImeCompositionRangeChanged(
 }
 
 gfx::Size OffScreenRenderWidgetHostView::GetPhysicalBackingSize() const {
-  return size_;
+  return gfx::ConvertSizeToPixel(scale_factor_, GetRequestedRendererSize());
 }
 
 gfx::Size OffScreenRenderWidgetHostView::GetRequestedRendererSize() const {
-  return size_;
+  return GetDelegatedFrameHost()->GetRequestedRendererSize();
 }
 
 #if !defined(OS_MACOSX)
@@ -723,22 +850,29 @@ bool OffScreenRenderWidgetHostView::DelegatedFrameHostIsVisible() const {
 
 SkColor OffScreenRenderWidgetHostView::DelegatedFrameHostGetGutterColor(
     SkColor color) const {
+  if (render_widget_host_->delegate() &&
+      render_widget_host_->delegate()->IsFullscreenForCurrentTab()) {
+    return SK_ColorBLACK;
+  }
   return color;
 }
 
 gfx::Size OffScreenRenderWidgetHostView::DelegatedFrameHostDesiredSizeInDIP()
   const {
-  return size_;
+  return GetRootLayer()->bounds().size();
 }
 
 bool OffScreenRenderWidgetHostView::DelegatedFrameCanCreateResizeLock() const {
-  return false;
+  return !render_widget_host_->auto_resize_enabled();
 }
 
 std::unique_ptr<content::ResizeLock>
   OffScreenRenderWidgetHostView::DelegatedFrameHostCreateResizeLock(
       bool defer_compositor_lock) {
-  return nullptr;
+  return std::unique_ptr<content::ResizeLock>(new AtomResizeLock(
+    this,
+    DelegatedFrameHostDesiredSizeInDIP(),
+    defer_compositor_lock));
 }
 
 void OffScreenRenderWidgetHostView::DelegatedFrameHostResizeLockWasReleased() {
@@ -795,6 +929,57 @@ bool OffScreenRenderWidgetHostView::TransformPointToCoordSpaceForView(
       point, target_view, transformed_point);
 }
 
+void OffScreenRenderWidgetHostView::CancelWidget() {
+  if (render_widget_host_)
+    render_widget_host_->LostCapture();  
+  Hide();
+  
+  if (parent_host_view_) {
+    if (parent_host_view_->popup_host_view_ == this) {
+      parent_host_view_->set_popup_host_view(NULL);
+      parent_host_view_->popup_bitmap_.reset();
+    } else if (parent_host_view_->child_host_view_ == this) {
+      parent_host_view_->set_child_host_view(NULL);
+      parent_host_view_->Show();
+    } else {
+      parent_host_view_->RemoveGuestHostView(this);
+    }
+    parent_host_view_ = NULL;
+  }
+  
+  if (render_widget_host_ && !is_destroyed_) {
+    is_destroyed_ = true;
+    // Results in a call to Destroy().
+    render_widget_host_->ShutdownAndDestroyWidget(true);
+  }
+}
+
+void OffScreenRenderWidgetHostView::AddGuestHostView(
+    OffScreenRenderWidgetHostView* guest_host) {
+  guest_host_views_.insert(guest_host);
+}
+
+void OffScreenRenderWidgetHostView::RemoveGuestHostView(
+    OffScreenRenderWidgetHostView* guest_host) {
+  guest_host_views_.erase(guest_host);
+}
+
+void OffScreenRenderWidgetHostView::RegisterGuestViewFrameSwappedCallback(
+    content::RenderWidgetHostViewGuest* guest_host_view) {
+  guest_host_view->RegisterFrameSwappedCallback(base::MakeUnique<base::Closure>(
+    base::Bind(&OffScreenRenderWidgetHostView::OnGuestViewFrameSwapped,
+               weak_ptr_factory_.GetWeakPtr(),
+               base::Unretained(guest_host_view))));
+}
+
+void OffScreenRenderWidgetHostView::OnGuestViewFrameSwapped(
+    content::RenderWidgetHostViewGuest* guest_host_view) {
+  InvalidateBounds(
+    gfx::ConvertRectToPixel(scale_factor_, guest_host_view->GetViewBounds()));
+  
+  RegisterGuestViewFrameSwappedCallback(guest_host_view);
+}
+
 std::unique_ptr<cc::SoftwareOutputDevice>
   OffScreenRenderWidgetHostView::CreateSoftwareOutputDevice(
     ui::Compositor* compositor) {
@@ -823,7 +1008,7 @@ bool OffScreenRenderWidgetHostView::InstallTransparency() {
 }
 
 bool OffScreenRenderWidgetHostView::IsAutoResizeEnabled() const {
-  return false;
+  return render_widget_host_->auto_resize_enabled();
 }
 
 void OffScreenRenderWidgetHostView::SetNeedsBeginFrames(
@@ -837,10 +1022,143 @@ void OffScreenRenderWidgetHostView::SetNeedsBeginFrames(
   }
 }
 
+void CopyBitmapTo(
+    const SkBitmap& destination, 
+    const SkBitmap& source, 
+    const gfx::Rect& pos) {
+  SkAutoLockPixels source_pixels_lock(source);
+  SkAutoLockPixels destination_pixels_lock(destination);
+  
+  char* src = static_cast<char*>(source.getPixels());
+  char* dest = static_cast<char*>(destination.getPixels());
+  int pixelsize = source.bytesPerPixel();
+  
+  if (pos.x() + pos.width() <= destination.width() &&
+    pos.y() + pos.height() <= destination.height()) {
+    for (int i = 0; i < pos.height(); i++) {
+      memcpy(dest + ((pos.y() + i) * destination.width() + pos.x()) * pixelsize,
+        src + (i * source.width()) * pixelsize,
+        source.width() * pixelsize);
+    }
+  }
+  
+  destination.notifyPixelsChanged();
+}
+
 void OffScreenRenderWidgetHostView::OnPaint(
     const gfx::Rect& damage_rect, const SkBitmap& bitmap) {
   TRACE_EVENT0("electron", "OffScreenRenderWidgetHostView::OnPaint");
+  
+  HoldResize();
+  
+  if (parent_callback_)
+    parent_callback_.Run(damage_rect, bitmap);
+  else if (popup_host_view_ && popup_bitmap_.get()) {
+    gfx::Rect pos = popup_host_view_->popup_position_;
+    SkBitmap copy = SkBitmapOperations::CreateTiledBitmap(bitmap,
+      pos.x(), pos.y(), pos.width(), pos.height());
+    
+    CopyBitmapTo(bitmap, *popup_bitmap_, pos);
     callback_.Run(damage_rect, bitmap);
+    CopyBitmapTo(bitmap, copy, pos);
+  } else {
+    callback_.Run(damage_rect, bitmap);
+  }
+  
+  ReleaseResize();
+}
+
+void OffScreenRenderWidgetHostView::OnPopupPaint(
+    const gfx::Rect& damage_rect, const SkBitmap& bitmap) {
+  if (popup_host_view_ && popup_bitmap_.get())
+    bitmap.deepCopyTo(popup_bitmap_.get());
+}
+
+void OffScreenRenderWidgetHostView::HoldResize() {
+  if (!hold_resize_)
+    hold_resize_ = true;
+}
+
+void OffScreenRenderWidgetHostView::ReleaseResize() {
+  if (!hold_resize_)
+    return;
+
+  hold_resize_ = false;
+  if (pending_resize_) {
+    pending_resize_ = false;
+    content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+        base::Bind(&OffScreenRenderWidgetHostView::WasResized,
+                   weak_ptr_factory_.GetWeakPtr()));
+  }
+}
+
+void OffScreenRenderWidgetHostView::WasResized() {
+  if (hold_resize_) {
+    if (!pending_resize_)
+      pending_resize_ = true;
+    return;
+  }
+  
+  ResizeRootLayer();
+  if (render_widget_host_)
+    render_widget_host_->WasResized();
+  GetDelegatedFrameHost()->WasResized();
+}
+
+void OffScreenRenderWidgetHostView::ProcessKeyboardEvent(
+    const content::NativeWebKeyboardEvent& event) {
+  if (!render_widget_host_)
+    return;
+  render_widget_host_->ForwardKeyboardEvent(event);
+}
+
+void OffScreenRenderWidgetHostView::ProcessMouseEvent(
+    const blink::WebMouseEvent& event,
+    const ui::LatencyInfo& latency) {
+  if (!IsPopupWidget()) {
+    if (popup_host_view_ &&
+        popup_host_view_->popup_position_.Contains(event.x, event.y)) {
+      blink::WebMouseEvent popup_event(event);
+      popup_event.x -= popup_host_view_->popup_position_.x();
+      popup_event.y -= popup_host_view_->popup_position_.y();
+      popup_event.windowX = popup_event.x;
+      popup_event.windowY = popup_event.y;
+
+      popup_host_view_->ProcessMouseEvent(popup_event, latency);
+      return;
+    }
+  }
+  if (!render_widget_host_)
+    return;
+  render_widget_host_->ForwardMouseEvent(event);
+}
+
+void OffScreenRenderWidgetHostView::ProcessMouseWheelEvent(
+    const blink::WebMouseWheelEvent& event,
+    const ui::LatencyInfo& latency) {
+  if (!IsPopupWidget()) {
+    if (popup_host_view_) {
+      if (popup_host_view_->popup_position_.Contains(event.x, event.y)) {
+        blink::WebMouseWheelEvent popup_event(event);
+        popup_event.x -= popup_host_view_->popup_position_.x();
+        popup_event.y -= popup_host_view_->popup_position_.y();
+        popup_event.windowX = popup_event.x;
+        popup_event.windowY = popup_event.y;
+        popup_host_view_->ProcessMouseWheelEvent(popup_event, latency);
+        return;
+      } else {
+        // Scrolling outside of the popup widget so destroy it.
+        // Execute asynchronously to avoid deleting the widget from inside some
+        // other callback.
+        content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
+            base::Bind(&OffScreenRenderWidgetHostView::CancelWidget,
+                       popup_host_view_->weak_ptr_factory_.GetWeakPtr()));
+      }
+    }
+  }
+  if (!render_widget_host_)
+    return;
+  render_widget_host_->ForwardWheelEvent(event);
 }
 
 void OffScreenRenderWidgetHostView::SetPainting(bool painting) {
@@ -856,12 +1174,22 @@ bool OffScreenRenderWidgetHostView::IsPainting() const {
 }
 
 void OffScreenRenderWidgetHostView::SetFrameRate(int frame_rate) {
+  if (parent_host_view_) {
+    if (parent_host_view_->GetFrameRate() == GetFrameRate())
+      return;
+
+    frame_rate_ = parent_host_view_->GetFrameRate();
+  } else {
     if (frame_rate <= 0)
       frame_rate = 1;
     if (frame_rate > 60)
       frame_rate = 60;
   
     frame_rate_ = frame_rate;
+  }
+  
+  for (auto guest_host_view : guest_host_views_)
+    guest_host_view->SetFrameRate(frame_rate);
 
   SetupFrameRate(true);
 }
@@ -910,8 +1238,10 @@ void OffScreenRenderWidgetHostView::SetupFrameRate(bool force) {
 }
 
 void OffScreenRenderWidgetHostView::Invalidate() {
-  const gfx::Rect& bounds_in_pixels = GetViewBounds();
+  InvalidateBounds(GetViewBounds());
+}
 
+void OffScreenRenderWidgetHostView::InvalidateBounds(const gfx::Rect& bounds) {
   if (software_output_device_) {
     software_output_device_->OnPaint(bounds_in_pixels);
   } else if (copy_frame_generator_) {
@@ -925,7 +1255,11 @@ void OffScreenRenderWidgetHostView::ResizeRootLayer() {
   const float orgScaleFactor = scale_factor_;
   const bool scaleFactorDidChange = (orgScaleFactor != scale_factor_);
 
-  gfx::Size size = GetViewBounds().size();
+  gfx::Size size;
+  if (!IsPopupWidget())
+    size = GetViewBounds().size();
+  else
+    size = popup_position_.size();
 
   if (!scaleFactorDidChange && size == GetRootLayer()->bounds().size())
     return;

atom/browser/osr/osr_render_widget_host_view.h

@@ -20,10 +20,12 @@
 #include "base/time/time.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/scheduler/begin_frame_source.h"
+#include "content/browser/frame_host/render_widget_host_view_guest.h"
 #include "content/browser/renderer_host/delegated_frame_host.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/resize_lock.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/compositor/compositor.h"
@@ -69,7 +71,7 @@ class OffScreenRenderWidgetHostView
   OffScreenRenderWidgetHostView(bool transparent,
                                 const OnPaintCallback& callback,
                                 content::RenderWidgetHost* render_widget_host,
-                                bool is_guest_view_hack,
+                                OffScreenRenderWidgetHostView* parent_host_view,
                                 NativeWindow* native_window);
   ~OffScreenRenderWidgetHostView() override;
 
@@ -139,6 +141,9 @@ class OffScreenRenderWidgetHostView
   void BeginFrameSubscription(
     std::unique_ptr<content::RenderWidgetHostViewFrameSubscriber>) override;
   void EndFrameSubscription() override;
+  void InitAsGuest(
+    content::RenderWidgetHostView*, 
+    content::RenderWidgetHostViewGuest*) override;
   bool HasAcceleratedSurface(const gfx::Size &) override;
   gfx::Rect GetBoundsInRootWindow(void) override;
   void ImeCompositionRangeChanged(
@@ -193,7 +198,32 @@ class OffScreenRenderWidgetHostView
   void DestroyPlatformWidget();
 #endif
 
+  void CancelWidget();
+  void AddGuestHostView(OffScreenRenderWidgetHostView* guest_host);
+  void RemoveGuestHostView(OffScreenRenderWidgetHostView* guest_host);
+
+  void RegisterGuestViewFrameSwappedCallback(
+      content::RenderWidgetHostViewGuest* guest_host_view);
+  void OnGuestViewFrameSwapped(
+      content::RenderWidgetHostViewGuest* guest_host_view);
+
   void OnPaint(const gfx::Rect& damage_rect, const SkBitmap& bitmap);
+  void OnPopupPaint(const gfx::Rect& damage_rect, const SkBitmap& bitmap);
+  
+  bool IsPopupWidget() const {
+    return popup_type_ != blink::WebPopupTypeNone;
+  }
+  
+  void HoldResize();
+  void ReleaseResize();
+  void WasResized();
+  
+  void ProcessKeyboardEvent(
+      const content::NativeWebKeyboardEvent& event) override;
+  void ProcessMouseEvent(const blink::WebMouseEvent& event,
+      const ui::LatencyInfo& latency) override;
+  void ProcessMouseWheelEvent(const blink::WebMouseWheelEvent& event,
+      const ui::LatencyInfo& latency) override;
 
   void SetPainting(bool painting);
   bool IsPainting() const;
@@ -206,6 +236,7 @@ class OffScreenRenderWidgetHostView
   content::DelegatedFrameHost* GetDelegatedFrameHost() const;
 
   void Invalidate();
+  void InvalidateBounds(const gfx::Rect&);
 
   content::RenderWidgetHostImpl* render_widget_host() const
       { return render_widget_host_; }
@@ -213,6 +244,14 @@ class OffScreenRenderWidgetHostView
   gfx::Size size() const { return size_; }
   float scale_factor() const { return scale_factor_; }
 
+  void set_popup_host_view(OffScreenRenderWidgetHostView* popup_view) {
+    popup_host_view_ = popup_view;
+  }
+  
+  void set_child_host_view(OffScreenRenderWidgetHostView* child_view) {
+    child_host_view_ = child_view;
+  }
+
  private:
   void SetupFrameRate(bool force);
   void ResizeRootLayer();
@@ -221,11 +260,19 @@ class OffScreenRenderWidgetHostView
 
   // Weak ptrs.
   content::RenderWidgetHostImpl* render_widget_host_;
+  
+  OffScreenRenderWidgetHostView* parent_host_view_;
+  OffScreenRenderWidgetHostView* popup_host_view_;
+  std::unique_ptr<SkBitmap> popup_bitmap_;
+  OffScreenRenderWidgetHostView* child_host_view_;
+  std::set<OffScreenRenderWidgetHostView*> guest_host_views_;
+  
   NativeWindow* native_window_;
   OffScreenOutputDevice* software_output_device_;
 
   const bool transparent_;
   OnPaintCallback callback_;
+  OnPaintCallback parent_callback_;
 
   int frame_rate_;
   int frame_rate_threshold_ms_;
@@ -233,11 +280,17 @@ class OffScreenRenderWidgetHostView
   base::Time last_time_;
 
   float scale_factor_;
-  bool is_showing_;
   gfx::Vector2dF last_scroll_offset_;
   gfx::Size size_;
   bool painting_;
   
+  bool is_showing_;
+  bool is_destroyed_;
+  gfx::Rect popup_position_;
+
+  bool hold_resize_;
+  bool pending_resize_;
+
   std::unique_ptr<ui::Layer> root_layer_;
   std::unique_ptr<ui::Compositor> compositor_;
   std::unique_ptr<content::DelegatedFrameHost> delegated_frame_host_;

atom/browser/osr/osr_web_contents_view.cc

@@ -4,7 +4,9 @@
 
 #include "atom/browser/osr/osr_web_contents_view.h"
 
+#include "content/public/browser/render_view_host.h"
 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
+#include "ui/display/screen.h"
 
 namespace atom {
 
@@ -31,15 +33,27 @@ void OffScreenWebContentsView::SetWebContents(
 
 #if !defined(OS_MACOSX)
 gfx::NativeView OffScreenWebContentsView::GetNativeView() const {
-  return gfx::NativeView();
+  if (!web_contents_) return gfx::NativeView();
+  
+  auto relay = NativeWindowRelay::FromWebContents(web_contents_);
+  if (!relay) return gfx::NativeView();
+  return relay->window->GetNativeView();
 }
 
 gfx::NativeView OffScreenWebContentsView::GetContentNativeView() const {
-  return gfx::NativeView();
+  if (!web_contents_) return gfx::NativeView();
+  
+  auto relay = NativeWindowRelay::FromWebContents(web_contents_);
+  if (!relay) return gfx::NativeView();
+  return relay->window->GetNativeView();
 }
 
 gfx::NativeWindow OffScreenWebContentsView::GetTopLevelNativeWindow() const {
-  return gfx::NativeWindow();
+  if (!web_contents_) return gfx::NativeWindow();
+  
+  auto relay = NativeWindowRelay::FromWebContents(web_contents_);
+  if (!relay) return gfx::NativeWindow();
+  return relay->window->GetNativeWindow();
 }
 #endif
 
@@ -67,7 +81,7 @@ content::DropData* OffScreenWebContentsView::GetDropData() const {
 }
 
 gfx::Rect OffScreenWebContentsView::GetViewBounds() const {
-  return view_ ? view_->GetViewBounds() : gfx::Rect();
+  return GetView() ? GetView()->GetViewBounds() : gfx::Rect();
 }
 
 void OffScreenWebContentsView::CreateView(const gfx::Size& initial_size,
@@ -77,20 +91,54 @@ void OffScreenWebContentsView::CreateView(const gfx::Size& initial_size,
 content::RenderWidgetHostViewBase*
   OffScreenWebContentsView::CreateViewForWidget(
     content::RenderWidgetHost* render_widget_host, bool is_guest_view_hack) {  
+  if (render_widget_host->GetView()) {
+    return static_cast<content::RenderWidgetHostViewBase*>(
+        render_widget_host->GetView());
+  }
+  
   auto relay = NativeWindowRelay::FromWebContents(web_contents_);
-  view_ = new OffScreenRenderWidgetHostView(
+  return new OffScreenRenderWidgetHostView(
-      transparent_, callback_, render_widget_host,
+      transparent_, 
-      is_guest_view_hack, relay->window.get());
+      callback_, 
-  return view_;
+      render_widget_host, 
+      nullptr, 
+      relay->window.get());
+}
+
+content::RenderWidgetHostViewBase*
+  OffScreenWebContentsView::CreateViewForWidget(
+    content::RenderWidgetHost* render_widget_host,
+    content::RenderWidgetHost* embedder_render_widget_host) {
+  if (render_widget_host->GetView()) {
+    return static_cast<content::RenderWidgetHostViewBase*>(
+        render_widget_host->GetView());
+  }
+  
+  OffScreenRenderWidgetHostView* embedder_host_view = nullptr;
+  if (embedder_render_widget_host) {
+    embedder_host_view = static_cast<OffScreenRenderWidgetHostView*>(
+        embedder_render_widget_host->GetView());
+  }
+  
+  auto relay = NativeWindowRelay::FromWebContents(web_contents_);
+  return new OffScreenRenderWidgetHostView(
+      transparent_, 
+      callback_, 
+      render_widget_host, 
+      embedder_host_view, 
+      relay->window.get());
 }
 
 content::RenderWidgetHostViewBase*
   OffScreenWebContentsView::CreateViewForPopupWidget(
     content::RenderWidgetHost* render_widget_host) {
   auto relay = NativeWindowRelay::FromWebContents(web_contents_);
-  view_ = new OffScreenRenderWidgetHostView(
+  return new OffScreenRenderWidgetHostView(
-      transparent_, callback_, render_widget_host, false, relay->window.get());
+      transparent_, 
-  return view_;
+      callback_, 
+      render_widget_host, 
+      GetView(), 
+      relay->window.get());
 }
 
 void OffScreenWebContentsView::SetPageTitle(const base::string16& title) {
@@ -98,8 +146,8 @@ void OffScreenWebContentsView::SetPageTitle(const base::string16& title) {
 
 void OffScreenWebContentsView::RenderViewCreated(
     content::RenderViewHost* host) {
-  if (view_)
+  if (GetView())
-    view_->InstallTransparency();
+    GetView()->InstallTransparency();
 }
 
 void OffScreenWebContentsView::RenderViewSwappedIn(
@@ -111,14 +159,23 @@ void OffScreenWebContentsView::SetOverscrollControllerEnabled(bool enabled) {
 
 void OffScreenWebContentsView::GetScreenInfo(
     content::ScreenInfo* screen_info) const {
-  screen_info->rect = gfx::Rect(view_->size());
-  screen_info->available_rect = gfx::Rect(view_->size());
   screen_info->depth = 24;
   screen_info->depth_per_component = 8;
-  screen_info->device_scale_factor = view_->scale_factor();
   screen_info->orientation_angle = 0;
   screen_info->orientation_type =
       content::SCREEN_ORIENTATION_VALUES_LANDSCAPE_PRIMARY;
+      
+  if (GetView()) {
+    screen_info->rect = gfx::Rect(GetView()->size());
+    screen_info->available_rect = gfx::Rect(GetView()->size());
+    screen_info->device_scale_factor = GetView()->scale_factor();
+  } else {
+    const display::Display display = 
+      display::Screen::GetScreen()->GetPrimaryDisplay();
+    screen_info->rect = display.bounds();
+    screen_info->available_rect = display.work_area();
+    screen_info->device_scale_factor = display.device_scale_factor();
+  }
 }
 
 #if defined(OS_MACOSX)
@@ -152,4 +209,12 @@ void OffScreenWebContentsView::UpdateDragCursor(
     blink::WebDragOperation operation) {
 }
 
+OffScreenRenderWidgetHostView* OffScreenWebContentsView::GetView() const {
+  if (web_contents_) {
+    return static_cast<OffScreenRenderWidgetHostView*>(
+        web_contents_->GetRenderViewHost()->GetWidget()->GetView());
+  }
+  return nullptr;
+}
+
 }  // namespace atom

atom/browser/osr/osr_web_contents_view.h

@@ -45,6 +45,9 @@ class OffScreenWebContentsView : public content::WebContentsView,
   content::RenderWidgetHostViewBase* CreateViewForWidget(
       content::RenderWidgetHost* render_widget_host,
       bool is_guest_view_hack) override;
+  content::RenderWidgetHostViewBase* CreateViewForWidget(
+      content::RenderWidgetHost* render_widget_host,
+      content::RenderWidgetHost* embedder_render_widget_host) override;
   content::RenderWidgetHostViewBase* CreateViewForPopupWidget(
       content::RenderWidgetHost* render_widget_host) override;
   void SetPageTitle(const base::string16& title) override;
@@ -75,11 +78,12 @@ class OffScreenWebContentsView : public content::WebContentsView,
   void PlatformDestroy();
 #endif
 
+  OffScreenRenderWidgetHostView* GetView() const;
+
   const bool transparent_;
   OnPaintCallback callback_;
 
   // Weak refs.
-  OffScreenRenderWidgetHostView* view_;
   content::WebContents* web_contents_;
 
 #if defined(OS_MACOSX)