content/browser/renderer_host/render_widget_helper.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/render_widget_helper.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/lazy_instance.h"
  10 #include "base/posix/eintr_wrapper.h"
  11 #include "base/threading/thread.h"
  12 #include "base/threading/thread_restrictions.h"
  13 #include "content/browser/dom_storage/session_storage_namespace_impl.h"
  14 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  15 #include "content/browser/gpu/gpu_surface_tracker.h"
  16 #include "content/browser/loader/resource_dispatcher_host_impl.h"
  17 #include "content/browser/renderer_host/render_process_host_impl.h"
  18 #include "content/browser/renderer_host/render_view_host_impl.h"
  19 #include "content/common/view_messages.h"
  20
  21 namespace content {
  22 namespace {
  23
  24 typedef std::map<int, RenderWidgetHelper*> WidgetHelperMap;
  25 base::LazyInstance<WidgetHelperMap> g_widget_helpers =
  26     LAZY_INSTANCE_INITIALIZER;
  27
  28 void AddWidgetHelper(int render_process_id,
  29                      const scoped_refptr<RenderWidgetHelper>& widget_helper) {
  30   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  31   // We don't care if RenderWidgetHelpers overwrite an existing process_id. Just
  32   // want this to be up to date.
  33   g_widget_helpers.Get()[render_process_id] = widget_helper.get();
  34 }
  35
  36 }  // namespace
  37
  38 RenderWidgetHelper::RenderWidgetHelper()
  39     : render_process_id_(-1),
  40       resource_dispatcher_host_(NULL) {
  41 }
  42
  43 RenderWidgetHelper::~RenderWidgetHelper() {
  44   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  45
  46   // Delete this RWH from the map if it is found.
  47   WidgetHelperMap& widget_map = g_widget_helpers.Get();
  48   WidgetHelperMap::iterator it = widget_map.find(render_process_id_);
  49   if (it != widget_map.end() && it->second == this)
  50     widget_map.erase(it);
  51 }
  52
  53 void RenderWidgetHelper::Init(
  54     int render_process_id,
  55     ResourceDispatcherHostImpl* resource_dispatcher_host) {
  56   render_process_id_ = render_process_id;
  57   resource_dispatcher_host_ = resource_dispatcher_host;
  58
  59   BrowserThread::PostTask(
  60       BrowserThread::IO, FROM_HERE,
  61       base::Bind(&AddWidgetHelper,
  62                  render_process_id_, make_scoped_refptr(this)));
  63 }
  64
  65 int RenderWidgetHelper::GetNextRoutingID() {
  66   return next_routing_id_.GetNext() + 1;
  67 }
  68
  69 // static
  70 RenderWidgetHelper* RenderWidgetHelper::FromProcessHostID(
  71     int render_process_host_id) {
  72   DCHECK_CURRENTLY_ON(BrowserThread::IO);
  73   WidgetHelperMap::const_iterator ci = g_widget_helpers.Get().find(
  74       render_process_host_id);
  75   return (ci == g_widget_helpers.Get().end())? NULL : ci->second;
  76 }
  77
  78 void RenderWidgetHelper::ResumeDeferredNavigation(
  79     const GlobalRequestID& request_id) {
  80   BrowserThread::PostTask(
  81       BrowserThread::IO, FROM_HERE,
  82       base::Bind(&RenderWidgetHelper::OnResumeDeferredNavigation,
  83                  this,
  84                  request_id));
  85 }
  86
  87 void RenderWidgetHelper::ResumeRequestsForView(int route_id) {
  88   // We only need to resume blocked requests if we used a valid route_id.
  89   // See CreateNewWindow.
  90   if (route_id != MSG_ROUTING_NONE) {
  91     BrowserThread::PostTask(
  92         BrowserThread::IO, FROM_HERE,
  93         base::Bind(&RenderWidgetHelper::OnResumeRequestsForView,
  94             this, route_id));
  95   }
  96 }
  97
  98 void RenderWidgetHelper::OnResumeDeferredNavigation(
  99     const GlobalRequestID& request_id) {
 100   resource_dispatcher_host_->ResumeDeferredNavigation(request_id);
 101 }
 102
 103 void RenderWidgetHelper::CreateNewWindow(
 104     const ViewHostMsg_CreateWindow_Params& params,
 105     bool no_javascript_access,
 106     base::ProcessHandle render_process,
 107     int* route_id,
 108     int* main_frame_route_id,
 109     int* surface_id,
 110     SessionStorageNamespace* session_storage_namespace) {
 111   if (params.opener_suppressed || no_javascript_access) {
 112     // If the opener is supppressed or script access is disallowed, we should
 113     // open the window in a new BrowsingInstance, and thus a new process. That
 114     // means the current renderer process will not be able to route messages to
 115     // it. Because of this, we will immediately show and navigate the window
 116     // in OnCreateWindowOnUI, using the params provided here.
 117     *route_id = MSG_ROUTING_NONE;
 118     *main_frame_route_id = MSG_ROUTING_NONE;
 119     *surface_id = 0;
 120   } else {
 121     *route_id = GetNextRoutingID();
 122     *main_frame_route_id = GetNextRoutingID();
 123     *surface_id = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 124         render_process_id_, *route_id);
 125     // Block resource requests until the view is created, since the HWND might
 126     // be needed if a response ends up creating a plugin.
 127     resource_dispatcher_host_->BlockRequestsForRoute(
 128         render_process_id_, *route_id);
 129     resource_dispatcher_host_->BlockRequestsForRoute(
 130         render_process_id_, *main_frame_route_id);
 131   }
 132
 133   BrowserThread::PostTask(
 134       BrowserThread::UI, FROM_HERE,
 135       base::Bind(&RenderWidgetHelper::OnCreateWindowOnUI,
 136                  this, params, *route_id, *main_frame_route_id,
 137                  make_scoped_refptr(session_storage_namespace)));
 138 }
 139
 140 void RenderWidgetHelper::OnCreateWindowOnUI(
 141     const ViewHostMsg_CreateWindow_Params& params,
 142     int route_id,
 143     int main_frame_route_id,
 144     SessionStorageNamespace* session_storage_namespace) {
 145   RenderViewHostImpl* host =
 146       RenderViewHostImpl::FromID(render_process_id_, params.opener_id);
 147   if (host)
 148     host->CreateNewWindow(route_id, main_frame_route_id, params,
 149         session_storage_namespace);
 150 }
 151
 152 void RenderWidgetHelper::OnResumeRequestsForView(int route_id) {
 153   resource_dispatcher_host_->ResumeBlockedRequestsForRoute(
 154       render_process_id_, route_id);
 155 }
 156
 157 void RenderWidgetHelper::CreateNewWidget(int opener_id,
 158                                          blink::WebPopupType popup_type,
 159                                          int* route_id,
 160                                          int* surface_id) {
 161   *route_id = GetNextRoutingID();
 162   *surface_id = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 163       render_process_id_, *route_id);
 164   BrowserThread::PostTask(
 165       BrowserThread::UI, FROM_HERE,
 166       base::Bind(
 167           &RenderWidgetHelper::OnCreateWidgetOnUI, this, opener_id, *route_id,
 168           popup_type));
 169 }
 170
 171 void RenderWidgetHelper::CreateNewFullscreenWidget(int opener_id,
 172                                                    int* route_id,
 173                                                    int* surface_id) {
 174   *route_id = GetNextRoutingID();
 175   *surface_id = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 176       render_process_id_, *route_id);
 177   BrowserThread::PostTask(
 178       BrowserThread::UI, FROM_HERE,
 179       base::Bind(
 180           &RenderWidgetHelper::OnCreateFullscreenWidgetOnUI, this,
 181           opener_id, *route_id));
 182 }
 183
 184 void RenderWidgetHelper::OnCreateWidgetOnUI(
 185     int opener_id, int route_id, blink::WebPopupType popup_type) {
 186   RenderViewHostImpl* host = RenderViewHostImpl::FromID(
 187       render_process_id_, opener_id);
 188   if (host)
 189     host->CreateNewWidget(route_id, popup_type);
 190 }
 191
 192 void RenderWidgetHelper::OnCreateFullscreenWidgetOnUI(int opener_id,
 193                                                       int route_id) {
 194   RenderViewHostImpl* host = RenderViewHostImpl::FromID(
 195       render_process_id_, opener_id);
 196   if (host)
 197     host->CreateNewFullscreenWidget(route_id);
 198 }
 199
 200 }  // namespace content