// 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 "content/browser/renderer_host/render_frame_host_impl.h"

#include "base/containers/hash_tables.h"
#include "base/lazy_instance.h"
#include "content/browser/renderer_host/render_view_host_impl.h"

namespace content {

// The (process id, routing id) pair that identifies one RenderFrame.
typedef std::pair<int32, int32> RenderFrameHostID;
typedef base::hash_map<RenderFrameHostID, RenderFrameHostImpl*>
    RoutingIDFrameMap;
static base::LazyInstance<RoutingIDFrameMap> g_routing_id_frame_map =
    LAZY_INSTANCE_INITIALIZER;

// static
RenderFrameHostImpl* RenderFrameHostImpl::FromID(
    int process_id, int routing_id) {
  RoutingIDFrameMap* frames = g_routing_id_frame_map.Pointer();
  RoutingIDFrameMap::iterator it = frames->find(
      RenderFrameHostID(process_id, routing_id));
  return it == frames->end() ? NULL : it->second;
}

RenderFrameHostImpl::RenderFrameHostImpl(
    RenderViewHostImpl* render_view_host,
    int routing_id,
    bool is_swapped_out)
    : render_view_host_(render_view_host),
      routing_id_(routing_id),
      is_swapped_out_(is_swapped_out) {
  GetProcess()->AddRoute(routing_id_, this);
  g_routing_id_frame_map.Get().insert(std::make_pair(
      RenderFrameHostID(GetProcess()->GetID(), routing_id_),
      this));
}

RenderFrameHostImpl::~RenderFrameHostImpl() {
  GetProcess()->RemoveRoute(routing_id_);
  g_routing_id_frame_map.Get().erase(
      RenderFrameHostID(GetProcess()->GetID(), routing_id_));

}

bool RenderFrameHostImpl::Send(IPC::Message* message) {
  return GetProcess()->Send(message);
}

bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
  return false;
}

void RenderFrameHostImpl::Init() {
  GetProcess()->ResumeRequestsForView(routing_id());
}

RenderProcessHost* RenderFrameHostImpl::GetProcess() const {
  // TODO(ajwong): This should return its own process once cross-process
  // subframe navigations are supported.
  return render_view_host_->GetProcess();
}

}  // namespace content