text: // Copyright (c) 2015 GitHub, Inc.
  // Use of this source code is governed by the MIT license that can be
  // found in the LICENSE file.
  
  #include "atom/renderer/guest_view_container.h"
  
  #include <map>
  
  #include "base/bind.h"
  #include "base/lazy_instance.h"
  #include "base/threading/thread_task_runner_handle.h"
  #include "ui/gfx/geometry/size.h"
  
  namespace atom {
  
  namespace {
  
  using GuestViewContainerMap = std::map<int, GuestViewContainer*>;
  static base::LazyInstance<GuestViewContainerMap> g_guest_view_container_map =
      LAZY_INSTANCE_INITIALIZER;
  
  }  // namespace
  
  GuestViewContainer::GuestViewContainer(content::RenderFrame* render_frame)
      : weak_ptr_factory_(this) {
  }
  
  GuestViewContainer::~GuestViewContainer() {
    if (element_instance_id_ > 0)
      g_guest_view_container_map.Get().erase(element_instance_id_);
  }
  
  // static
  GuestViewContainer* GuestViewContainer::FromID(int element_instance_id) {
    GuestViewContainerMap* guest_view_containers =
        g_guest_view_container_map.Pointer();
    auto it = guest_view_containers->find(element_instance_id);
    return it == guest_view_containers->end() ? nullptr : it->second;
  }
  
  void GuestViewContainer::RegisterElementResizeCallback(
      const ResizeCallback& callback) {
    element_resize_callback_ = callback;
  }
  
  void GuestViewContainer::SetElementInstanceID(int element_instance_id) {
    element_instance_id_ = element_instance_id;
    g_guest_view_container_map.Get().insert(
        std::make_pair(element_instance_id, this));
  }
  
  void GuestViewContainer::DidResizeElement(const gfx::Size& new_size) {
    if (element_resize_callback_.is_null())
      return;
  
    base::ThreadTaskRunnerHandle::Get()->PostTask(
        FROM_HERE, base::Bind(element_resize_callback_, new_size));
  }
  
  base::WeakPtr<content::BrowserPluginDelegate> GuestViewContainer::GetWeakPtr() {
    return weak_ptr_factory_.GetWeakPtr();
  }
  
  }  // namespace atom
  