content/browser/renderer_host/render_widget_host_impl.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_host_impl.h"
   6
   7 #include <math.h>
   8 #include <set>
   9 #include <utility>
  10
  11 #include "base/auto_reset.h"
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/containers/hash_tables.h"
  15 #include "base/i18n/rtl.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/location.h"
  18 #include "base/metrics/field_trial.h"
  19 #include "base/metrics/histogram.h"
  20 #include "base/single_thread_task_runner.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/thread_task_runner_handle.h"
  24 #include "base/trace_event/trace_event.h"
  25 #include "cc/base/switches.h"
  26 #include "cc/output/compositor_frame.h"
  27 #include "cc/output/compositor_frame_ack.h"
  28 #include "content/browser/accessibility/accessibility_mode_helper.h"
  29 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  30 #include "content/browser/bad_message.h"
  31 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  32 #include "content/browser/gpu/compositor_util.h"
  33 #include "content/browser/gpu/gpu_process_host.h"
  34 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  35 #include "content/browser/gpu/gpu_surface_tracker.h"
  36 #include "content/browser/renderer_host/dip_util.h"
  37 #include "content/browser/renderer_host/frame_metadata_util.h"
  38 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  39 #include "content/browser/renderer_host/input/input_router_impl.h"
  40 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  41 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  42 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  43 #include "content/browser/renderer_host/input/timeout_monitor.h"
  44 #include "content/browser/renderer_host/input/touch_emulator.h"
  45 #include "content/browser/renderer_host/render_process_host_impl.h"
  46 #include "content/browser/renderer_host/render_view_host_impl.h"
  47 #include "content/browser/renderer_host/render_widget_helper.h"
  48 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  49 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  50 #include "content/browser/renderer_host/render_widget_resize_helper.h"
  51 #include "content/common/content_constants_internal.h"
  52 #include "content/common/cursors/webcursor.h"
  53 #include "content/common/frame_messages.h"
  54 #include "content/common/gpu/gpu_messages.h"
  55 #include "content/common/host_shared_bitmap_manager.h"
  56 #include "content/common/input_messages.h"
  57 #include "content/common/view_messages.h"
  58 #include "content/public/browser/native_web_keyboard_event.h"
  59 #include "content/public/browser/notification_service.h"
  60 #include "content/public/browser/notification_types.h"
  61 #include "content/public/browser/render_widget_host_iterator.h"
  62 #include "content/public/common/content_constants.h"
  63 #include "content/public/common/content_switches.h"
  64 #include "content/public/common/result_codes.h"
  65 #include "content/public/common/web_preferences.h"
  66 #include "gpu/GLES2/gl2extchromium.h"
  67 #include "gpu/command_buffer/service/gpu_switches.h"
  68 #include "skia/ext/image_operations.h"
  69 #include "skia/ext/platform_canvas.h"
  70 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  71 #include "ui/events/event.h"
  72 #include "ui/events/keycodes/keyboard_codes.h"
  73 #include "ui/gfx/geometry/size_conversions.h"
  74 #include "ui/gfx/geometry/vector2d_conversions.h"
  75 #include "ui/gfx/skbitmap_operations.h"
  76 #include "ui/snapshot/snapshot.h"
  77
  78 #if defined(OS_WIN)
  79 #include "content/common/plugin_constants_win.h"
  80 #endif
  81
  82 using base::Time;
  83 using base::TimeDelta;
  84 using base::TimeTicks;
  85 using blink::WebGestureEvent;
  86 using blink::WebInputEvent;
  87 using blink::WebKeyboardEvent;
  88 using blink::WebMouseEvent;
  89 using blink::WebMouseWheelEvent;
  90 using blink::WebTextDirection;
  91
  92 namespace content {
  93 namespace {
  94
  95 bool g_check_for_pending_resize_ack = true;
  96
  97 typedef std::pair<int32, int32> RenderWidgetHostID;
  98 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
  99     RoutingIDWidgetMap;
 100 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 101     LAZY_INSTANCE_INITIALIZER;
 102
 103 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 104 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 105 // iteration (or NULL if there isn't any left).
 106 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 107  public:
 108   RenderWidgetHostIteratorImpl()
 109       : current_index_(0) {
 110   }
 111
 112   ~RenderWidgetHostIteratorImpl() override {}
 113
 114   void Add(RenderWidgetHost* host) {
 115     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 116                                         host->GetRoutingID()));
 117   }
 118
 119   // RenderWidgetHostIterator:
 120   RenderWidgetHost* GetNextHost() override {
 121     RenderWidgetHost* host = NULL;
 122     while (current_index_ < hosts_.size() && !host) {
 123       RenderWidgetHostID id = hosts_[current_index_];
 124       host = RenderWidgetHost::FromID(id.first, id.second);
 125       ++current_index_;
 126     }
 127     return host;
 128   }
 129
 130  private:
 131   std::vector<RenderWidgetHostID> hosts_;
 132   size_t current_index_;
 133
 134   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 135 };
 136
 137 }  // namespace
 138
 139 ///////////////////////////////////////////////////////////////////////////////
 140 // RenderWidgetHostImpl
 141
 142 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 143                                            RenderProcessHost* process,
 144                                            int32 routing_id,
 145                                            int32 surface_id,
 146                                            bool hidden)
 147     : view_(NULL),
 148       hung_renderer_delay_(
 149           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs)),
 150       renderer_initialized_(false),
 151       delegate_(delegate),
 152       process_(process),
 153       routing_id_(routing_id),
 154       surface_id_(surface_id),
 155       is_loading_(false),
 156       is_hidden_(hidden),
 157       repaint_ack_pending_(false),
 158       resize_ack_pending_(false),
 159       color_profile_out_of_date_(false),
 160       auto_resize_enabled_(false),
 161       waiting_for_screen_rects_ack_(false),
 162       needs_repainting_on_restore_(false),
 163       is_unresponsive_(false),
 164       in_flight_event_count_(0),
 165       in_get_backing_store_(false),
 166       ignore_input_events_(false),
 167       text_direction_updated_(false),
 168       text_direction_(blink::WebTextDirectionLeftToRight),
 169       text_direction_canceled_(false),
 170       suppress_next_char_events_(false),
 171       pending_mouse_lock_request_(false),
 172       allow_privileged_mouse_lock_(false),
 173       has_touch_handler_(false),
 174       next_browser_snapshot_id_(1),
 175       owned_by_render_frame_host_(false),
 176       is_focused_(false),
 177       weak_factory_(this) {
 178   CHECK(delegate_);
 179   CHECK_NE(MSG_ROUTING_NONE, routing_id_);
 180   DCHECK_EQ(surface_id_, GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 181                              process_->GetID(), routing_id_));
 182
 183   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 184       g_routing_id_widget_map.Get().insert(std::make_pair(
 185           RenderWidgetHostID(process->GetID(), routing_id_), this));
 186   CHECK(result.second) << "Inserting a duplicate item!";
 187   process_->AddRoute(routing_id_, this);
 188
 189   // If we're initially visible, tell the process host that we're alive.
 190   // Otherwise we'll notify the process host when we are first shown.
 191   if (!hidden)
 192     process_->WidgetRestored();
 193
 194   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 195
 196   input_router_.reset(new InputRouterImpl(
 197       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 198
 199   touch_emulator_.reset();
 200
 201   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 202       IsRenderView() ? RenderViewHost::From(this) : NULL);
 203   if (BrowserPluginGuest::IsGuest(rvh) ||
 204       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 205           switches::kDisableHangMonitor)) {
 206     hang_monitor_timeout_.reset(new TimeoutMonitor(
 207         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 208                    weak_factory_.GetWeakPtr())));
 209   }
 210 }
 211
 212 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 213   if (view_weak_)
 214     view_weak_->RenderWidgetHostGone();
 215   SetView(NULL);
 216
 217   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 218   surface_id_ = 0;
 219
 220   process_->RemoveRoute(routing_id_);
 221   g_routing_id_widget_map.Get().erase(
 222       RenderWidgetHostID(process_->GetID(), routing_id_));
 223
 224   if (delegate_)
 225     delegate_->RenderWidgetDeleted(this);
 226 }
 227
 228 // static
 229 RenderWidgetHost* RenderWidgetHost::FromID(
 230     int32 process_id,
 231     int32 routing_id) {
 232   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 233 }
 234
 235 // static
 236 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 237     int32 process_id,
 238     int32 routing_id) {
 239   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 240   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 241   RoutingIDWidgetMap::iterator it = widgets->find(
 242       RenderWidgetHostID(process_id, routing_id));
 243   return it == widgets->end() ? NULL : it->second;
 244 }
 245
 246 // static
 247 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 248   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 249   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 250   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 251        it != widgets->end();
 252        ++it) {
 253     RenderWidgetHost* widget = it->second;
 254
 255     if (!widget->IsRenderView()) {
 256       hosts->Add(widget);
 257       continue;
 258     }
 259
 260     // Add only active RenderViewHosts.
 261     RenderViewHost* rvh = RenderViewHost::From(widget);
 262     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 263       hosts->Add(widget);
 264   }
 265
 266   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 267 }
 268
 269 // static
 270 scoped_ptr<RenderWidgetHostIterator>
 271 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 272   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 273   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 274   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 275        it != widgets->end();
 276        ++it) {
 277     hosts->Add(it->second);
 278   }
 279
 280   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 281 }
 282
 283 // static
 284 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 285   return rwh->AsRenderWidgetHostImpl();
 286 }
 287
 288 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 289   if (view)
 290     view_weak_ = view->GetWeakPtr();
 291   else
 292     view_weak_.reset();
 293   view_ = view;
 294
 295   // If the renderer has not yet been initialized, then the surface ID
 296   // namespace will be sent during initialization.
 297   if (view_ && renderer_initialized_) {
 298     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 299                                            view_->GetSurfaceIdNamespace()));
 300   }
 301
 302   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 303       surface_id_, GetCompositingSurface());
 304
 305   synthetic_gesture_controller_.reset();
 306 }
 307
 308 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 309   return process_;
 310 }
 311
 312 int RenderWidgetHostImpl::GetRoutingID() const {
 313   return routing_id_;
 314 }
 315
 316 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 317   return view_;
 318 }
 319
 320 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 321   return this;
 322 }
 323
 324 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 325   if (view_)
 326     return view_->GetNativeViewId();
 327   return 0;
 328 }
 329
 330 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 331   if (view_)
 332     return view_->GetCompositingSurface();
 333   return gfx::GLSurfaceHandle();
 334 }
 335
 336 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 337   resize_ack_pending_ = false;
 338   if (repaint_ack_pending_) {
 339     TRACE_EVENT_ASYNC_END0(
 340         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 341   }
 342   repaint_ack_pending_ = false;
 343   if (old_resize_params_)
 344     old_resize_params_->new_size = gfx::Size();
 345 }
 346
 347 void RenderWidgetHostImpl::SendScreenRects() {
 348   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 349     return;
 350
 351   if (is_hidden_) {
 352     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 353     // happens on Win & Mac, and when the view is shown it'll call this again.
 354     return;
 355   }
 356
 357   if (!view_)
 358     return;
 359
 360   last_view_screen_rect_ = view_->GetViewBounds();
 361   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 362   Send(new ViewMsg_UpdateScreenRects(
 363       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 364   if (delegate_)
 365     delegate_->DidSendScreenRects(this);
 366   waiting_for_screen_rects_ack_ = true;
 367 }
 368
 369 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 370   suppress_next_char_events_ = true;
 371 }
 372
 373 void RenderWidgetHostImpl::FlushInput() {
 374   input_router_->RequestNotificationWhenFlushed();
 375   if (synthetic_gesture_controller_)
 376     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 377 }
 378
 379 void RenderWidgetHostImpl::SetNeedsFlush() {
 380   if (view_)
 381     view_->OnSetNeedsFlushInput();
 382 }
 383
 384 void RenderWidgetHostImpl::Init() {
 385   DCHECK(process_->HasConnection());
 386
 387   renderer_initialized_ = true;
 388
 389   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 390       surface_id_, GetCompositingSurface());
 391
 392   // Send the ack along with the information on placement.
 393   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 394   GetProcess()->ResumeRequestsForView(routing_id_);
 395
 396   // If the RWHV has not yet been set, the surface ID namespace will get
 397   // passed down by the call to SetView().
 398   if (view_) {
 399     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 400                                            view_->GetSurfaceIdNamespace()));
 401   }
 402
 403   WasResized();
 404 }
 405
 406 void RenderWidgetHostImpl::InitForFrame() {
 407   DCHECK(process_->HasConnection());
 408   renderer_initialized_ = true;
 409 }
 410
 411 void RenderWidgetHostImpl::Shutdown() {
 412   RejectMouseLockOrUnlockIfNecessary();
 413
 414   if (process_->HasConnection()) {
 415     // Tell the renderer object to close.
 416     bool rv = Send(new ViewMsg_Close(routing_id_));
 417     DCHECK(rv);
 418   }
 419
 420   Destroy();
 421 }
 422
 423 bool RenderWidgetHostImpl::IsLoading() const {
 424   return is_loading_;
 425 }
 426
 427 bool RenderWidgetHostImpl::IsRenderView() const {
 428   return false;
 429 }
 430
 431 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 432   bool handled = true;
 433   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 434     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 435     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 436                         OnQueueSyntheticGesture)
 437     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 438                         OnImeCancelComposition)
 439     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 440     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 441     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 442                         OnUpdateScreenRectsAck)
 443     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 444     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 445     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 446                                 OnSwapCompositorFrame(msg))
 447     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 448     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 449     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 450     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 451     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
 452                         OnTextInputStateChanged)
 453     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 456                         OnShowDisambiguationPopup)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 459                         OnSelectionBoundsChanged)
 460 #if defined(OS_WIN)
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 462                         OnWindowlessPluginDummyWindowCreated)
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 464                         OnWindowlessPluginDummyWindowDestroyed)
 465 #endif
 466     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 467                         OnImeCompositionRangeChanged)
 468     IPC_MESSAGE_UNHANDLED(handled = false)
 469   IPC_END_MESSAGE_MAP()
 470
 471   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 472     return true;
 473
 474   if (!handled && view_ && view_->OnMessageReceived(msg))
 475     return true;
 476
 477   return handled;
 478 }
 479
 480 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 481   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 482     return input_router_->SendInput(make_scoped_ptr(msg));
 483
 484   return process_->Send(msg);
 485 }
 486
 487 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 488   is_loading_ = is_loading;
 489   if (!view_)
 490     return;
 491   view_->SetIsLoading(is_loading);
 492 }
 493
 494 void RenderWidgetHostImpl::WasHidden() {
 495   if (is_hidden_)
 496     return;
 497
 498   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
 499   is_hidden_ = true;
 500
 501   // Don't bother reporting hung state when we aren't active.
 502   StopHangMonitorTimeout();
 503
 504   // If we have a renderer, then inform it that we are being hidden so it can
 505   // reduce its resource utilization.
 506   Send(new ViewMsg_WasHidden(routing_id_));
 507
 508   // Tell the RenderProcessHost we were hidden.
 509   process_->WidgetHidden();
 510
 511   bool is_visible = false;
 512   NotificationService::current()->Notify(
 513       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 514       Source<RenderWidgetHost>(this),
 515       Details<bool>(&is_visible));
 516 }
 517
 518 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 519   if (!is_hidden_)
 520     return;
 521
 522   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasShown");
 523   is_hidden_ = false;
 524
 525   SendScreenRects();
 526
 527   // When hidden, timeout monitoring for input events is disabled. Restore it
 528   // now to ensure consistent hang detection.
 529   if (in_flight_event_count_)
 530     RestartHangMonitorTimeout();
 531
 532   // Always repaint on restore.
 533   bool needs_repainting = true;
 534   needs_repainting_on_restore_ = false;
 535   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 536
 537   process_->WidgetRestored();
 538
 539   bool is_visible = true;
 540   NotificationService::current()->Notify(
 541       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 542       Source<RenderWidgetHost>(this),
 543       Details<bool>(&is_visible));
 544
 545   // It's possible for our size to be out of sync with the renderer. The
 546   // following is one case that leads to this:
 547   // 1. WasResized -> Send ViewMsg_Resize to render
 548   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 549   // 3. WasHidden
 550   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 551   //    is hidden. Now renderer/browser out of sync with what they think size
 552   //    is.
 553   // By invoking WasResized the renderer is updated as necessary. WasResized
 554   // does nothing if the sizes are already in sync.
 555   //
 556   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 557   // could handle both the restore and resize at once. This isn't that big a
 558   // deal as RenderWidget::WasShown delays updating, so that the resize from
 559   // WasResized is usually processed before the renderer is painted.
 560   WasResized();
 561 }
 562
 563 bool RenderWidgetHostImpl::GetResizeParams(
 564     ViewMsg_Resize_Params* resize_params) {
 565   *resize_params = ViewMsg_Resize_Params();
 566
 567   GetWebScreenInfo(&resize_params->screen_info);
 568   resize_params->resizer_rect = GetRootWindowResizerRect();
 569
 570   if (view_) {
 571     resize_params->new_size = view_->GetRequestedRendererSize();
 572     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 573     resize_params->top_controls_height = view_->GetTopControlsHeight();
 574     resize_params->top_controls_shrink_blink_size =
 575         view_->DoTopControlsShrinkBlinkSize();
 576     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 577     resize_params->is_fullscreen_granted = IsFullscreenGranted();
 578     resize_params->display_mode = GetDisplayMode();
 579   }
 580
 581   const bool size_changed =
 582       !old_resize_params_ ||
 583       old_resize_params_->new_size != resize_params->new_size ||
 584       (old_resize_params_->physical_backing_size.IsEmpty() &&
 585        !resize_params->physical_backing_size.IsEmpty());
 586   bool dirty = size_changed ||
 587       old_resize_params_->screen_info != resize_params->screen_info ||
 588       old_resize_params_->physical_backing_size !=
 589           resize_params->physical_backing_size ||
 590       old_resize_params_->is_fullscreen_granted !=
 591           resize_params->is_fullscreen_granted ||
 592       old_resize_params_->display_mode != resize_params->display_mode ||
 593       old_resize_params_->top_controls_height !=
 594           resize_params->top_controls_height ||
 595       old_resize_params_->top_controls_shrink_blink_size !=
 596           resize_params->top_controls_shrink_blink_size ||
 597       old_resize_params_->visible_viewport_size !=
 598           resize_params->visible_viewport_size;
 599
 600   // We don't expect to receive an ACK when the requested size or the physical
 601   // backing size is empty, or when the main viewport size didn't change.
 602   resize_params->needs_resize_ack =
 603       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 604       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 605
 606   return dirty;
 607 }
 608
 609 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 610     const ViewMsg_Resize_Params& resize_params) {
 611   resize_ack_pending_ = resize_params.needs_resize_ack;
 612
 613   old_resize_params_ =
 614       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 615 }
 616
 617 void RenderWidgetHostImpl::WasResized() {
 618   // Skip if the |delegate_| has already been detached because
 619   // it's web contents is being deleted.
 620   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 621       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 622     if (resize_ack_pending_ && color_profile_out_of_date_)
 623       DispatchColorProfile();
 624     return;
 625   }
 626
 627   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 628   if (color_profile_out_of_date_)
 629     DispatchColorProfile();
 630   if (!GetResizeParams(params.get()))
 631     return;
 632
 633   bool width_changed =
 634       !old_resize_params_ ||
 635       old_resize_params_->new_size.width() != params->new_size.width();
 636   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 637     resize_ack_pending_ = params->needs_resize_ack;
 638     old_resize_params_.swap(params);
 639   }
 640
 641   if (delegate_)
 642     delegate_->RenderWidgetWasResized(this, width_changed);
 643 }
 644
 645 void RenderWidgetHostImpl::DispatchColorProfile() {
 646 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
 647   static bool image_profiles = base::CommandLine::ForCurrentProcess()->
 648      HasSwitch(switches::kEnableImageColorProfiles);
 649   if (!image_profiles)
 650     return;
 651 #if defined(OS_WIN)
 652   // Windows will read disk to get the color profile data if needed, so
 653   // dispatch the SendColorProfile() work off the UI thread.
 654   BrowserThread::PostBlockingPoolTask(
 655       FROM_HERE,
 656       base::Bind(&RenderWidgetHostImpl::SendColorProfile,
 657                  weak_factory_.GetWeakPtr()));
 658 #elif !defined(OS_CHROMEOS) && !defined(OS_IOS) && !defined(OS_ANDROID)
 659   // Only support desktop Mac and Linux at this time.
 660   SendColorProfile();
 661 #endif
 662 #endif
 663 }
 664
 665 void RenderWidgetHostImpl::SendColorProfile() {
 666   if (!view_ || !delegate_)
 667     return;
 668   DCHECK(!view_->GetRequestedRendererSize().IsEmpty());
 669 #if defined(OS_WIN)
 670   DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
 671   DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
 672 #endif
 673   std::vector<char> color_profile;
 674   if (!GetScreenColorProfile(&color_profile))
 675     return;
 676   if (!renderer_initialized_ || !process_->HasConnection())
 677     return;
 678   if (!Send(new ViewMsg_ColorProfile(routing_id_, color_profile)))
 679     return;
 680   color_profile_out_of_date_ = false;
 681 }
 682
 683 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 684   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 685 }
 686
 687 void RenderWidgetHostImpl::GotFocus() {
 688   Focus();
 689   if (delegate_)
 690     delegate_->RenderWidgetGotFocus(this);
 691 }
 692
 693 void RenderWidgetHostImpl::Focus() {
 694   is_focused_ = true;
 695
 696   Send(new InputMsg_SetFocus(routing_id_, true));
 697 }
 698
 699 void RenderWidgetHostImpl::Blur() {
 700   is_focused_ = false;
 701
 702   // If there is a pending mouse lock request, we don't want to reject it at
 703   // this point. The user can switch focus back to this view and approve the
 704   // request later.
 705   if (IsMouseLocked())
 706     view_->UnlockMouse();
 707
 708   if (touch_emulator_)
 709     touch_emulator_->CancelTouch();
 710
 711   Send(new InputMsg_SetFocus(routing_id_, false));
 712 }
 713
 714 void RenderWidgetHostImpl::LostCapture() {
 715   if (touch_emulator_)
 716     touch_emulator_->CancelTouch();
 717
 718   Send(new InputMsg_MouseCaptureLost(routing_id_));
 719 }
 720
 721 void RenderWidgetHostImpl::SetActive(bool active) {
 722   Send(new ViewMsg_SetActive(routing_id_, active));
 723 }
 724
 725 void RenderWidgetHostImpl::LostMouseLock() {
 726   Send(new ViewMsg_MouseLockLost(routing_id_));
 727 }
 728
 729 void RenderWidgetHostImpl::ViewDestroyed() {
 730   RejectMouseLockOrUnlockIfNecessary();
 731
 732   // TODO(evanm): tracking this may no longer be necessary;
 733   // eliminate this function if so.
 734   SetView(NULL);
 735 }
 736
 737 void RenderWidgetHostImpl::CopyFromBackingStore(
 738     const gfx::Rect& src_subrect,
 739     const gfx::Size& accelerated_dst_size,
 740     ReadbackRequestCallback& callback,
 741     const SkColorType preferred_color_type) {
 742   if (view_) {
 743     TRACE_EVENT0("browser",
 744         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 745     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 746         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 747     view_->CopyFromCompositingSurface(accelerated_copy_rect,
 748                                       accelerated_dst_size, callback,
 749                                       preferred_color_type);
 750     return;
 751   }
 752
 753   callback.Run(SkBitmap(), content::READBACK_FAILED);
 754 }
 755
 756 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 757   if (view_)
 758     return view_->IsSurfaceAvailableForCopy();
 759   return false;
 760 }
 761
 762 #if defined(OS_ANDROID)
 763 void RenderWidgetHostImpl::LockBackingStore() {
 764   if (view_)
 765     view_->LockCompositingSurface();
 766 }
 767
 768 void RenderWidgetHostImpl::UnlockBackingStore() {
 769   if (view_)
 770     view_->UnlockCompositingSurface();
 771 }
 772 #endif
 773
 774 #if defined(OS_MACOSX)
 775 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 776   TRACE_EVENT0("browser",
 777       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 778
 779   if (!CanPauseForPendingResizeOrRepaints())
 780     return;
 781
 782   WaitForSurface();
 783 }
 784
 785 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 786   // Do not pause if the view is hidden.
 787   if (is_hidden())
 788     return false;
 789
 790   // Do not pause if there is not a paint or resize already coming.
 791   if (!repaint_ack_pending_ && !resize_ack_pending_)
 792     return false;
 793
 794   return true;
 795 }
 796
 797 void RenderWidgetHostImpl::WaitForSurface() {
 798   // How long to (synchronously) wait for the renderer to respond with a
 799   // new frame when our current frame doesn't exist or is the wrong size.
 800   // This timeout impacts the "choppiness" of our window resize.
 801   const int kPaintMsgTimeoutMS = 50;
 802
 803   if (!view_)
 804     return;
 805
 806   // The view_size will be current_size_ for auto-sized views and otherwise the
 807   // size of the view_. (For auto-sized views, current_size_ is updated during
 808   // UpdateRect messages.)
 809   gfx::Size view_size = current_size_;
 810   if (!auto_resize_enabled_) {
 811     // Get the desired size from the current view bounds.
 812     gfx::Rect view_rect = view_->GetViewBounds();
 813     if (view_rect.IsEmpty())
 814       return;
 815     view_size = view_rect.size();
 816   }
 817
 818   TRACE_EVENT2("renderer_host",
 819                "RenderWidgetHostImpl::WaitForSurface",
 820                "width",
 821                base::IntToString(view_size.width()),
 822                "height",
 823                base::IntToString(view_size.height()));
 824
 825   // We should not be asked to paint while we are hidden.  If we are hidden,
 826   // then it means that our consumer failed to call WasShown.
 827   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 828
 829   // We should never be called recursively; this can theoretically lead to
 830   // infinite recursion and almost certainly leads to lower performance.
 831   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 832   base::AutoReset<bool> auto_reset_in_get_backing_store(
 833       &in_get_backing_store_, true);
 834
 835   // We might have a surface that we can use already.
 836   if (view_->HasAcceleratedSurface(view_size))
 837     return;
 838
 839   // Request that the renderer produce a frame of the right size, if it
 840   // hasn't been requested already.
 841   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 842     repaint_start_time_ = TimeTicks::Now();
 843     repaint_ack_pending_ = true;
 844     TRACE_EVENT_ASYNC_BEGIN0(
 845         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 846     Send(new ViewMsg_Repaint(routing_id_, view_size));
 847   }
 848
 849   // Pump a nested message loop until we time out or get a frame of the right
 850   // size.
 851   TimeTicks start_time = TimeTicks::Now();
 852   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 853   TimeTicks timeout_time = start_time + time_left;
 854   while (1) {
 855     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 856     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 857       // For auto-resized views, current_size_ determines the view_size and it
 858       // may have changed during the handling of an UpdateRect message.
 859       if (auto_resize_enabled_)
 860         view_size = current_size_;
 861       if (view_->HasAcceleratedSurface(view_size))
 862         break;
 863     }
 864     time_left = timeout_time - TimeTicks::Now();
 865     if (time_left <= TimeDelta::FromSeconds(0)) {
 866       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 867       break;
 868     }
 869   }
 870
 871   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 872                              TimeTicks::Now() - start_time,
 873                              TimeDelta::FromMilliseconds(1),
 874                              TimeDelta::FromMilliseconds(200), 50);
 875 }
 876 #endif
 877
 878 bool RenderWidgetHostImpl::ScheduleComposite() {
 879   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 880       resize_ack_pending_) {
 881     return false;
 882   }
 883
 884   // Send out a request to the renderer to paint the view if required.
 885   repaint_start_time_ = TimeTicks::Now();
 886   repaint_ack_pending_ = true;
 887   TRACE_EVENT_ASYNC_BEGIN0(
 888       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 889   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 890   return true;
 891 }
 892
 893 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 894   if (hang_monitor_timeout_)
 895     hang_monitor_timeout_->Start(delay);
 896 }
 897
 898 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 899   if (hang_monitor_timeout_)
 900     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 901 }
 902
 903 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 904   if (hang_monitor_timeout_)
 905     hang_monitor_timeout_->Stop();
 906   RendererIsResponsive();
 907 }
 908
 909 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 910   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 911 }
 912
 913 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 914       const blink::WebMouseEvent& mouse_event,
 915       const ui::LatencyInfo& ui_latency) {
 916   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 917                "x", mouse_event.x, "y", mouse_event.y);
 918
 919   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 920     if (mouse_event_callbacks_[i].Run(mouse_event))
 921       return;
 922   }
 923
 924   if (IgnoreInputEvents())
 925     return;
 926
 927   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 928     return;
 929
 930   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 931   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 932   input_router_->SendMouseEvent(mouse_with_latency);
 933
 934   // Pass mouse state to gpu service if the subscribe uniform
 935   // extension is enabled.
 936   if (process_->SubscribeUniformEnabled()) {
 937     gpu::ValueState state;
 938     state.int_value[0] = mouse_event.x;
 939     state.int_value[1] = mouse_event.y;
 940     // TODO(orglofch) Separate the mapping of pending value states to the
 941     // Gpu Service to be per RWH not per process
 942     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 943   }
 944 }
 945
 946 void RenderWidgetHostImpl::ForwardWheelEvent(
 947     const WebMouseWheelEvent& wheel_event) {
 948   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 949 }
 950
 951 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 952       const blink::WebMouseWheelEvent& wheel_event,
 953       const ui::LatencyInfo& ui_latency) {
 954   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardWheelEvent",
 955                "dx", wheel_event.deltaX, "dy", wheel_event.deltaY);
 956
 957   if (IgnoreInputEvents())
 958     return;
 959
 960   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 961     return;
 962
 963   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 964   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 965   input_router_->SendWheelEvent(wheel_with_latency);
 966 }
 967
 968 void RenderWidgetHostImpl::ForwardGestureEvent(
 969     const blink::WebGestureEvent& gesture_event) {
 970   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 971 }
 972
 973 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 974     const blink::WebGestureEvent& gesture_event,
 975     const ui::LatencyInfo& ui_latency) {
 976   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 977   // Early out if necessary, prior to performing latency logic.
 978   if (IgnoreInputEvents())
 979     return;
 980
 981   if (delegate_->PreHandleGestureEvent(gesture_event))
 982     return;
 983
 984   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 985   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 986   input_router_->SendGestureEvent(gesture_with_latency);
 987 }
 988
 989 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 990       const blink::WebTouchEvent& touch_event) {
 991   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 992
 993   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 994   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 995   input_router_->SendTouchEvent(touch_with_latency);
 996 }
 997
 998 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 999       const blink::WebTouchEvent& touch_event,
1000       const ui::LatencyInfo& ui_latency) {
1001   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
1002
1003   // Always forward TouchEvents for touch stream consistency. They will be
1004   // ignored if appropriate in FilterInputEvent().
1005
1006   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
1007   if (touch_emulator_ &&
1008       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
1009     if (view_) {
1010       view_->ProcessAckedTouchEvent(
1011           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
1012     }
1013     return;
1014   }
1015
1016   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
1017   input_router_->SendTouchEvent(touch_with_latency);
1018 }
1019
1020 void RenderWidgetHostImpl::ForwardKeyboardEvent(
1021     const NativeWebKeyboardEvent& key_event) {
1022   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
1023   if (IgnoreInputEvents())
1024     return;
1025
1026   if (!process_->HasConnection())
1027     return;
1028
1029   // First, let keypress listeners take a shot at handling the event.  If a
1030   // listener handles the event, it should not be propagated to the renderer.
1031   if (KeyPressListenersHandleEvent(key_event)) {
1032     // Some keypresses that are accepted by the listener might have follow up
1033     // char events, which should be ignored.
1034     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1035       suppress_next_char_events_ = true;
1036     return;
1037   }
1038
1039   if (key_event.type == WebKeyboardEvent::Char &&
1040       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1041        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1042     OnUserGesture();
1043   }
1044
1045   // Double check the type to make sure caller hasn't sent us nonsense that
1046   // will mess up our key queue.
1047   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1048     return;
1049
1050   if (suppress_next_char_events_) {
1051     // If preceding RawKeyDown event was handled by the browser, then we need
1052     // suppress all Char events generated by it. Please note that, one
1053     // RawKeyDown event may generate multiple Char events, so we can't reset
1054     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1055     if (key_event.type == WebKeyboardEvent::Char)
1056       return;
1057     // We get a KeyUp or a RawKeyDown event.
1058     suppress_next_char_events_ = false;
1059   }
1060
1061   bool is_shortcut = false;
1062
1063   // Only pre-handle the key event if it's not handled by the input method.
1064   if (delegate_ && !key_event.skip_in_browser) {
1065     // We need to set |suppress_next_char_events_| to true if
1066     // PreHandleKeyboardEvent() returns true, but |this| may already be
1067     // destroyed at that time. So set |suppress_next_char_events_| true here,
1068     // then revert it afterwards when necessary.
1069     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1070       suppress_next_char_events_ = true;
1071
1072     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1073     // a hung/malicious renderer from interfering.
1074     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1075       return;
1076
1077     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1078       suppress_next_char_events_ = false;
1079   }
1080
1081   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1082     return;
1083
1084   NativeWebKeyboardEventWithLatencyInfo key_event_with_latency(key_event);
1085   latency_tracker_.OnInputEvent(key_event, &key_event_with_latency.latency);
1086   input_router_->SendKeyboardEvent(key_event_with_latency, is_shortcut);
1087 }
1088
1089 void RenderWidgetHostImpl::QueueSyntheticGesture(
1090     scoped_ptr<SyntheticGesture> synthetic_gesture,
1091     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1092   if (!synthetic_gesture_controller_ && view_) {
1093     synthetic_gesture_controller_.reset(
1094         new SyntheticGestureController(
1095             view_->CreateSyntheticGestureTarget().Pass()));
1096   }
1097   if (synthetic_gesture_controller_) {
1098     synthetic_gesture_controller_->QueueSyntheticGesture(
1099         synthetic_gesture.Pass(), on_complete);
1100   }
1101 }
1102
1103 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1104   if (!view_)
1105     return;
1106   view_->UpdateCursor(cursor);
1107 }
1108
1109 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1110   Send(new ViewMsg_ShowContextMenu(
1111       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1112 }
1113
1114 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1115   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1116 }
1117
1118 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1119   return latency_tracker_.latency_component_id();
1120 }
1121
1122 // static
1123 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1124   g_check_for_pending_resize_ack = false;
1125 }
1126
1127 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1128     const KeyPressEventCallback& callback) {
1129   key_press_event_callbacks_.push_back(callback);
1130 }
1131
1132 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1133     const KeyPressEventCallback& callback) {
1134   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1135     if (key_press_event_callbacks_[i].Equals(callback)) {
1136       key_press_event_callbacks_.erase(
1137           key_press_event_callbacks_.begin() + i);
1138       return;
1139     }
1140   }
1141 }
1142
1143 void RenderWidgetHostImpl::AddMouseEventCallback(
1144     const MouseEventCallback& callback) {
1145   mouse_event_callbacks_.push_back(callback);
1146 }
1147
1148 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1149     const MouseEventCallback& callback) {
1150   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1151     if (mouse_event_callbacks_[i].Equals(callback)) {
1152       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1153       return;
1154     }
1155   }
1156 }
1157
1158 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1159   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1160   if (view_)
1161     view_->GetScreenInfo(result);
1162   else
1163     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1164   // TODO(sievers): find a way to make this done another way so the method
1165   // can be const.
1166   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1167 }
1168
1169 bool RenderWidgetHostImpl::GetScreenColorProfile(
1170     std::vector<char>* color_profile) {
1171   DCHECK(color_profile->empty());
1172   if (view_)
1173     return view_->GetScreenColorProfile(color_profile);
1174   return false;
1175 }
1176
1177 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1178   color_profile_out_of_date_ = true;
1179
1180   if (delegate_)
1181     delegate_->ScreenInfoChanged();
1182
1183   // The resize message (which may not happen immediately) will carry with it
1184   // the screen info as well as the new size (if the screen has changed scale
1185   // factor).
1186   WasResized();
1187 }
1188
1189 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1190     const base::Callback<void(const unsigned char*,size_t)> callback) {
1191   int id = next_browser_snapshot_id_++;
1192   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1193   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1194 }
1195
1196 const NativeWebKeyboardEvent*
1197     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1198   return input_router_->GetLastKeyboardEvent();
1199 }
1200
1201 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1202                                               size_t offset,
1203                                               const gfx::Range& range) {
1204   if (view_)
1205     view_->SelectionChanged(text, offset, range);
1206 }
1207
1208 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1209     const ViewHostMsg_SelectionBounds_Params& params) {
1210   if (view_) {
1211     view_->SelectionBoundsChanged(params);
1212   }
1213 }
1214
1215 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1216                                                  base::TimeDelta interval) {
1217   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1218 }
1219
1220 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1221                                           int exit_code) {
1222   if (!renderer_initialized_)
1223     return;
1224
1225   // Clearing this flag causes us to re-create the renderer when recovering
1226   // from a crashed renderer.
1227   renderer_initialized_ = false;
1228
1229   waiting_for_screen_rects_ack_ = false;
1230
1231   // Must reset these to ensure that keyboard events work with a new renderer.
1232   suppress_next_char_events_ = false;
1233
1234   // Reset some fields in preparation for recovering from a crash.
1235   ResetSizeAndRepaintPendingFlags();
1236   current_size_.SetSize(0, 0);
1237   // After the renderer crashes, the view is destroyed and so the
1238   // RenderWidgetHost cannot track its visibility anymore. We assume such
1239   // RenderWidgetHost to be visible for the sake of internal accounting - be
1240   // careful about changing this - see http://crbug.com/401859.
1241   //
1242   // We need to at least make sure that the RenderProcessHost is notified about
1243   // the |is_hidden_| change, so that the renderer will have correct visibility
1244   // set when respawned.
1245   if (is_hidden_) {
1246     process_->WidgetRestored();
1247     is_hidden_ = false;
1248   }
1249
1250   // Reset this to ensure the hung renderer mechanism is working properly.
1251   in_flight_event_count_ = 0;
1252   StopHangMonitorTimeout();
1253
1254   if (view_) {
1255     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1256                                                gfx::GLSurfaceHandle());
1257     view_->RenderProcessGone(status, exit_code);
1258     view_ = NULL; // The View should be deleted by RenderProcessGone.
1259     view_weak_.reset();
1260   }
1261
1262   // Reconstruct the input router to ensure that it has fresh state for a new
1263   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1264   // event. (In particular, the above call to view_->RenderProcessGone will
1265   // destroy the aura window, which may dispatch a synthetic mouse move.)
1266   input_router_.reset(new InputRouterImpl(
1267       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1268
1269   synthetic_gesture_controller_.reset();
1270 }
1271
1272 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1273   text_direction_updated_ = true;
1274   text_direction_ = direction;
1275 }
1276
1277 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1278   if (text_direction_updated_)
1279     text_direction_canceled_ = true;
1280 }
1281
1282 void RenderWidgetHostImpl::NotifyTextDirection() {
1283   if (text_direction_updated_) {
1284     if (!text_direction_canceled_)
1285       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1286     text_direction_updated_ = false;
1287     text_direction_canceled_ = false;
1288   }
1289 }
1290
1291 void RenderWidgetHostImpl::ImeSetComposition(
1292     const base::string16& text,
1293     const std::vector<blink::WebCompositionUnderline>& underlines,
1294     int selection_start,
1295     int selection_end) {
1296   Send(new InputMsg_ImeSetComposition(
1297             GetRoutingID(), text, underlines, selection_start, selection_end));
1298 }
1299
1300 void RenderWidgetHostImpl::ImeConfirmComposition(
1301     const base::string16& text,
1302     const gfx::Range& replacement_range,
1303     bool keep_selection) {
1304   Send(new InputMsg_ImeConfirmComposition(
1305         GetRoutingID(), text, replacement_range, keep_selection));
1306 }
1307
1308 void RenderWidgetHostImpl::ImeCancelComposition() {
1309   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1310             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1311 }
1312
1313 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1314   return gfx::Rect();
1315 }
1316
1317 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1318                                               bool last_unlocked_by_target) {
1319   // Directly reject to lock the mouse. Subclass can override this method to
1320   // decide whether to allow mouse lock or not.
1321   GotResponseToLockMouseRequest(false);
1322 }
1323
1324 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1325   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1326   if (pending_mouse_lock_request_) {
1327     pending_mouse_lock_request_ = false;
1328     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1329   } else if (IsMouseLocked()) {
1330     view_->UnlockMouse();
1331   }
1332 }
1333
1334 bool RenderWidgetHostImpl::IsMouseLocked() const {
1335   return view_ ? view_->IsMouseLocked() : false;
1336 }
1337
1338 bool RenderWidgetHostImpl::IsFullscreenGranted() const {
1339   return false;
1340 }
1341
1342 blink::WebDisplayMode RenderWidgetHostImpl::GetDisplayMode() const {
1343   return blink::WebDisplayModeBrowser;
1344 }
1345
1346 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1347                                          const gfx::Size& min_size,
1348                                          const gfx::Size& max_size) {
1349   auto_resize_enabled_ = enable;
1350   min_size_for_auto_resize_ = min_size;
1351   max_size_for_auto_resize_ = max_size;
1352 }
1353
1354 void RenderWidgetHostImpl::Destroy() {
1355   NotificationService::current()->Notify(
1356       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1357       Source<RenderWidgetHost>(this),
1358       NotificationService::NoDetails());
1359
1360   // Tell the view to die.
1361   // Note that in the process of the view shutting down, it can call a ton
1362   // of other messages on us.  So if you do any other deinitialization here,
1363   // do it after this call to view_->Destroy().
1364   if (view_) {
1365     view_->Destroy();
1366     view_ = nullptr;
1367   }
1368
1369   delete this;
1370 }
1371
1372 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1373   NotificationService::current()->Notify(
1374       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1375       Source<RenderWidgetHost>(this),
1376       NotificationService::NoDetails());
1377   is_unresponsive_ = true;
1378   NotifyRendererUnresponsive();
1379 }
1380
1381 void RenderWidgetHostImpl::RendererIsResponsive() {
1382   if (is_unresponsive_) {
1383     is_unresponsive_ = false;
1384     NotifyRendererResponsive();
1385   }
1386 }
1387
1388 void RenderWidgetHostImpl::OnRenderViewReady() {
1389   SendScreenRects();
1390   WasResized();
1391 }
1392
1393 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1394   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1395   // it handles destruction.
1396   if (!owned_by_render_frame_host_) {
1397     // TODO(evanm): This synchronously ends up calling "delete this".
1398     // Is that really what we want in response to this message?  I'm matching
1399     // previous behavior of the code here.
1400     Destroy();
1401   } else {
1402     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1403   }
1404 }
1405
1406 void RenderWidgetHostImpl::OnClose() {
1407   Shutdown();
1408 }
1409
1410 void RenderWidgetHostImpl::OnSetTooltipText(
1411     const base::string16& tooltip_text,
1412     WebTextDirection text_direction_hint) {
1413   // First, add directionality marks around tooltip text if necessary.
1414   // A naive solution would be to simply always wrap the text. However, on
1415   // windows, Unicode directional embedding characters can't be displayed on
1416   // systems that lack RTL fonts and are instead displayed as empty squares.
1417   //
1418   // To get around this we only wrap the string when we deem it necessary i.e.
1419   // when the locale direction is different than the tooltip direction hint.
1420   //
1421   // Currently, we use element's directionality as the tooltip direction hint.
1422   // An alternate solution would be to set the overall directionality based on
1423   // trying to detect the directionality from the tooltip text rather than the
1424   // element direction.  One could argue that would be a preferable solution
1425   // but we use the current approach to match Fx & IE's behavior.
1426   base::string16 wrapped_tooltip_text = tooltip_text;
1427   if (!tooltip_text.empty()) {
1428     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1429       // Force the tooltip to have LTR directionality.
1430       wrapped_tooltip_text =
1431           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1432     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1433                !base::i18n::IsRTL()) {
1434       // Force the tooltip to have RTL directionality.
1435       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1436     }
1437   }
1438   if (GetView())
1439     view_->SetTooltipText(wrapped_tooltip_text);
1440 }
1441
1442 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1443   waiting_for_screen_rects_ack_ = false;
1444   if (!view_)
1445     return;
1446
1447   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1448       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1449     return;
1450   }
1451
1452   SendScreenRects();
1453 }
1454
1455 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1456   if (view_) {
1457     view_->SetBounds(pos);
1458     Send(new ViewMsg_Move_ACK(routing_id_));
1459   }
1460 }
1461
1462 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1463     const IPC::Message& message) {
1464   // This trace event is used in
1465   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1466   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1467   ViewHostMsg_SwapCompositorFrame::Param param;
1468   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1469     return false;
1470   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1471   uint32 output_surface_id = base::get<0>(param);
1472   base::get<1>(param).AssignTo(frame.get());
1473   std::vector<IPC::Message> messages_to_deliver_with_frame;
1474   messages_to_deliver_with_frame.swap(base::get<2>(param));
1475
1476   if (!ui::LatencyInfo::Verify(frame->metadata.latency_info,
1477                                "RenderWidgetHostImpl::OnSwapCompositorFrame"))
1478     return false;
1479
1480   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1481
1482   bool is_mobile_optimized = IsMobileOptimizedFrame(frame->metadata);
1483   input_router_->NotifySiteIsMobileOptimized(is_mobile_optimized);
1484   if (touch_emulator_)
1485     touch_emulator_->SetDoubleTapSupportForPageEnabled(!is_mobile_optimized);
1486
1487   if (view_) {
1488     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1489     view_->DidReceiveRendererFrame();
1490   } else {
1491     cc::CompositorFrameAck ack;
1492     if (frame->gl_frame_data) {
1493       ack.gl_frame_data = frame->gl_frame_data.Pass();
1494       ack.gl_frame_data->sync_point = 0;
1495     } else if (frame->delegated_frame_data) {
1496       cc::TransferableResource::ReturnResources(
1497           frame->delegated_frame_data->resource_list,
1498           &ack.resources);
1499     }
1500     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1501                                process_->GetID(), ack);
1502   }
1503
1504   RenderProcessHost* rph = GetProcess();
1505   for (std::vector<IPC::Message>::const_iterator i =
1506            messages_to_deliver_with_frame.begin();
1507        i != messages_to_deliver_with_frame.end();
1508        ++i) {
1509     rph->OnMessageReceived(*i);
1510     if (i->dispatch_error())
1511       rph->OnBadMessageReceived(*i);
1512   }
1513   messages_to_deliver_with_frame.clear();
1514
1515   return true;
1516 }
1517
1518 void RenderWidgetHostImpl::OnUpdateRect(
1519     const ViewHostMsg_UpdateRect_Params& params) {
1520   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1521   TimeTicks paint_start = TimeTicks::Now();
1522
1523   // Update our knowledge of the RenderWidget's size.
1524   current_size_ = params.view_size;
1525
1526   bool is_resize_ack =
1527       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1528
1529   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1530   // that will end up reaching GetBackingStore.
1531   if (is_resize_ack) {
1532     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1533     resize_ack_pending_ = false;
1534   }
1535
1536   bool is_repaint_ack =
1537       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1538   if (is_repaint_ack) {
1539     DCHECK(repaint_ack_pending_);
1540     TRACE_EVENT_ASYNC_END0(
1541         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1542     repaint_ack_pending_ = false;
1543     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1544     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1545   }
1546
1547   DCHECK(!params.view_size.IsEmpty());
1548
1549   DidUpdateBackingStore(params, paint_start);
1550
1551   if (auto_resize_enabled_) {
1552     bool post_callback = new_auto_size_.IsEmpty();
1553     new_auto_size_ = params.view_size;
1554     if (post_callback) {
1555       base::ThreadTaskRunnerHandle::Get()->PostTask(
1556           FROM_HERE, base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1557                                 weak_factory_.GetWeakPtr()));
1558     }
1559   }
1560
1561   // Log the time delta for processing a paint message. On platforms that don't
1562   // support asynchronous painting, this is equivalent to
1563   // MPArch.RWH_TotalPaintTime.
1564   TimeDelta delta = TimeTicks::Now() - paint_start;
1565   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1566 }
1567
1568 void RenderWidgetHostImpl::DidUpdateBackingStore(
1569     const ViewHostMsg_UpdateRect_Params& params,
1570     const TimeTicks& paint_start) {
1571   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1572   TimeTicks update_start = TimeTicks::Now();
1573
1574   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1575   // will not be re-issued, so must move them now, regardless of whether we
1576   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1577   // in the process could dispatch other window messages which could cause the
1578   // view to be destroyed.
1579   if (view_)
1580     view_->MovePluginWindows(params.plugin_window_moves);
1581
1582   NotificationService::current()->Notify(
1583       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1584       Source<RenderWidgetHost>(this),
1585       NotificationService::NoDetails());
1586
1587   // We don't need to update the view if the view is hidden. We must do this
1588   // early return after the ACK is sent, however, or the renderer will not send
1589   // us more data.
1590   if (is_hidden_)
1591     return;
1592
1593   // If we got a resize ack, then perhaps we have another resize to send?
1594   bool is_resize_ack =
1595       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1596   if (is_resize_ack)
1597     WasResized();
1598
1599   // Log the time delta for processing a paint message.
1600   TimeTicks now = TimeTicks::Now();
1601   TimeDelta delta = now - update_start;
1602   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1603 }
1604
1605 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1606     const SyntheticGesturePacket& gesture_packet) {
1607   // Only allow untrustworthy gestures if explicitly enabled.
1608   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1609           cc::switches::kEnableGpuBenchmarking)) {
1610     bad_message::ReceivedBadMessage(GetProcess(),
1611                                     bad_message::RWH_SYNTHETIC_GESTURE);
1612     return;
1613   }
1614
1615   QueueSyntheticGesture(
1616         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1617         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1618                    weak_factory_.GetWeakPtr()));
1619 }
1620
1621 void RenderWidgetHostImpl::OnFocus() {
1622   // Only RenderViewHost can deal with that message.
1623   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1624 }
1625
1626 void RenderWidgetHostImpl::OnBlur() {
1627   // Only RenderViewHost can deal with that message.
1628   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1629 }
1630
1631 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1632   SetCursor(cursor);
1633 }
1634
1635 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1636     bool enabled, ui::GestureProviderConfigType config_type) {
1637   if (enabled) {
1638     if (!touch_emulator_) {
1639       touch_emulator_.reset(new TouchEmulator(
1640           this, view_ ? content::GetScaleFactorForView(view_) : 1.0f));
1641     }
1642     touch_emulator_->Enable(config_type);
1643   } else {
1644     if (touch_emulator_)
1645       touch_emulator_->Disable();
1646   }
1647 }
1648
1649 void RenderWidgetHostImpl::OnTextInputStateChanged(
1650     const ViewHostMsg_TextInputState_Params& params) {
1651   if (view_)
1652     view_->TextInputStateChanged(params);
1653 }
1654
1655 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1656     const gfx::Range& range,
1657     const std::vector<gfx::Rect>& character_bounds) {
1658   if (view_)
1659     view_->ImeCompositionRangeChanged(range, character_bounds);
1660 }
1661
1662 void RenderWidgetHostImpl::OnImeCancelComposition() {
1663   if (view_)
1664     view_->ImeCancelComposition();
1665 }
1666
1667 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1668                                        bool last_unlocked_by_target,
1669                                        bool privileged) {
1670
1671   if (pending_mouse_lock_request_) {
1672     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1673     return;
1674   } else if (IsMouseLocked()) {
1675     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1676     return;
1677   }
1678
1679   pending_mouse_lock_request_ = true;
1680   if (privileged && allow_privileged_mouse_lock_) {
1681     // Directly approve to lock the mouse.
1682     GotResponseToLockMouseRequest(true);
1683   } else {
1684     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1685   }
1686 }
1687
1688 void RenderWidgetHostImpl::OnUnlockMouse() {
1689   RejectMouseLockOrUnlockIfNecessary();
1690 }
1691
1692 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1693     const gfx::Rect& rect_pixels,
1694     const gfx::Size& size,
1695     const cc::SharedBitmapId& id) {
1696   DCHECK(!rect_pixels.IsEmpty());
1697   DCHECK(!size.IsEmpty());
1698
1699   scoped_ptr<cc::SharedBitmap> bitmap =
1700       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1701   if (!bitmap) {
1702     bad_message::ReceivedBadMessage(GetProcess(),
1703                                     bad_message::RWH_SHARED_BITMAP);
1704     return;
1705   }
1706
1707   DCHECK(bitmap->pixels());
1708
1709   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1710   SkBitmap zoomed_bitmap;
1711   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1712
1713   // Note that |rect| is in coordinates of pixels relative to the window origin.
1714   // Aura-based systems will want to convert this to DIPs.
1715   if (view_)
1716     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1717
1718   // It is assumed that the disambiguation popup will make a copy of the
1719   // provided zoomed image, so we delete this one.
1720   zoomed_bitmap.setPixels(0);
1721   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1722 }
1723
1724 #if defined(OS_WIN)
1725 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1726     gfx::NativeViewId dummy_activation_window) {
1727   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1728
1729   // This may happen as a result of a race condition when the plugin is going
1730   // away.
1731   wchar_t window_title[MAX_PATH + 1] = {0};
1732   if (!IsWindow(hwnd) ||
1733       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1734       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1735     return;
1736   }
1737
1738 #if defined(USE_AURA)
1739   SetParent(hwnd,
1740             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1741 #else
1742   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1743 #endif
1744   dummy_windows_for_activation_.push_back(hwnd);
1745 }
1746
1747 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1748     gfx::NativeViewId dummy_activation_window) {
1749   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1750   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1751   for (; i != dummy_windows_for_activation_.end(); ++i) {
1752     if ((*i) == hwnd) {
1753       dummy_windows_for_activation_.erase(i);
1754       return;
1755     }
1756   }
1757   NOTREACHED() << "Unknown dummy window";
1758 }
1759 #endif
1760
1761 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1762   ignore_input_events_ = ignore_input_events;
1763 }
1764
1765 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1766     const NativeWebKeyboardEvent& event) {
1767   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1768     return false;
1769
1770   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1771     size_t original_size = key_press_event_callbacks_.size();
1772     if (key_press_event_callbacks_[i].Run(event))
1773       return true;
1774
1775     // Check whether the callback that just ran removed itself, in which case
1776     // the iterator needs to be decremented to properly account for the removal.
1777     size_t current_size = key_press_event_callbacks_.size();
1778     if (current_size != original_size) {
1779       DCHECK_EQ(original_size - 1, current_size);
1780       --i;
1781     }
1782   }
1783
1784   return false;
1785 }
1786
1787 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1788     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1789   // Don't ignore touch cancel events, since they may be sent while input
1790   // events are being ignored in order to keep the renderer from getting
1791   // confused about how many touches are active.
1792   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1793     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1794
1795   if (!process_->HasConnection())
1796     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1797
1798   if (event.type == WebInputEvent::MouseDown ||
1799       event.type == WebInputEvent::GestureTapDown) {
1800     OnUserGesture();
1801   }
1802
1803   return view_ ? view_->FilterInputEvent(event)
1804                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1805 }
1806
1807 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1808   increment_in_flight_event_count();
1809   if (!is_hidden_)
1810     StartHangMonitorTimeout(hung_renderer_delay_);
1811 }
1812
1813 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1814   if (decrement_in_flight_event_count() <= 0) {
1815     // Cancel pending hung renderer checks since the renderer is responsive.
1816     StopHangMonitorTimeout();
1817   } else {
1818     // The renderer is responsive, but there are in-flight events to wait for.
1819     if (!is_hidden_)
1820       RestartHangMonitorTimeout();
1821   }
1822 }
1823
1824 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1825   has_touch_handler_ = has_handlers;
1826 }
1827
1828 void RenderWidgetHostImpl::DidFlush() {
1829   if (synthetic_gesture_controller_)
1830     synthetic_gesture_controller_->OnDidFlushInput();
1831 }
1832
1833 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1834   if (view_)
1835     view_->DidOverscroll(params);
1836 }
1837
1838 void RenderWidgetHostImpl::DidStopFlinging() {
1839   if (view_)
1840     view_->DidStopFlinging();
1841 }
1842
1843 void RenderWidgetHostImpl::OnKeyboardEventAck(
1844       const NativeWebKeyboardEventWithLatencyInfo& event,
1845       InputEventAckState ack_result) {
1846   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1847
1848 #if defined(OS_MACOSX)
1849   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event.event))
1850     return;
1851 #endif
1852
1853   // We only send unprocessed key event upwards if we are not hidden,
1854   // because the user has moved away from us and no longer expect any effect
1855   // of this key event.
1856   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1857   if (delegate_ && !processed && !is_hidden() && !event.event.skip_in_browser) {
1858     delegate_->HandleKeyboardEvent(event.event);
1859
1860     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1861     // (i.e.  in the case of Ctrl+W, where the call to
1862     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1863   }
1864 }
1865
1866 void RenderWidgetHostImpl::OnMouseEventAck(
1867     const MouseEventWithLatencyInfo& mouse_event,
1868     InputEventAckState ack_result) {
1869   latency_tracker_.OnInputEventAck(mouse_event.event, &mouse_event.latency);
1870 }
1871
1872 void RenderWidgetHostImpl::OnWheelEventAck(
1873     const MouseWheelEventWithLatencyInfo& wheel_event,
1874     InputEventAckState ack_result) {
1875   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1876
1877   if (!is_hidden() && view_) {
1878     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1879         delegate_->HandleWheelEvent(wheel_event.event)) {
1880       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1881     }
1882     view_->WheelEventAck(wheel_event.event, ack_result);
1883   }
1884 }
1885
1886 void RenderWidgetHostImpl::OnGestureEventAck(
1887     const GestureEventWithLatencyInfo& event,
1888     InputEventAckState ack_result) {
1889   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1890
1891   if (view_)
1892     view_->GestureEventAck(event.event, ack_result);
1893 }
1894
1895 void RenderWidgetHostImpl::OnTouchEventAck(
1896     const TouchEventWithLatencyInfo& event,
1897     InputEventAckState ack_result) {
1898   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1899
1900   if (touch_emulator_ &&
1901       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1902     return;
1903   }
1904
1905   if (view_)
1906     view_->ProcessAckedTouchEvent(event, ack_result);
1907 }
1908
1909 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1910   if (type == BAD_ACK_MESSAGE) {
1911     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1912   } else if (type == UNEXPECTED_EVENT_TYPE) {
1913     suppress_next_char_events_ = false;
1914   }
1915 }
1916
1917 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1918     SyntheticGesture::Result result) {
1919   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1920 }
1921
1922 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1923   return ignore_input_events_ || process_->IgnoreInputEvents();
1924 }
1925
1926 void RenderWidgetHostImpl::StartUserGesture() {
1927   OnUserGesture();
1928 }
1929
1930 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1931   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1932 }
1933
1934 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1935     const std::vector<EditCommand>& commands) {
1936   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1937 }
1938
1939 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1940                                               const std::string& value) {
1941   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1942 }
1943
1944 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1945     const gfx::Rect& rect) {
1946   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1947 }
1948
1949 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1950   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1951 }
1952
1953 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1954   if (!allowed) {
1955     RejectMouseLockOrUnlockIfNecessary();
1956     return false;
1957   } else {
1958     if (!pending_mouse_lock_request_) {
1959       // This is possible, e.g., the plugin sends us an unlock request before
1960       // the user allows to lock to mouse.
1961       return false;
1962     }
1963
1964     pending_mouse_lock_request_ = false;
1965     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1966       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1967       return false;
1968     } else {
1969       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1970       return true;
1971     }
1972   }
1973 }
1974
1975 // static
1976 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1977     int32 route_id,
1978     uint32 output_surface_id,
1979     int renderer_host_id,
1980     const cc::CompositorFrameAck& ack) {
1981   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1982   if (!host)
1983     return;
1984   host->Send(new ViewMsg_SwapCompositorFrameAck(
1985       route_id, output_surface_id, ack));
1986 }
1987
1988 // static
1989 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1990     int32 route_id,
1991     uint32 output_surface_id,
1992     int renderer_host_id,
1993     const cc::CompositorFrameAck& ack) {
1994   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1995   if (!host)
1996     return;
1997   host->Send(
1998       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1999 }
2000
2001 void RenderWidgetHostImpl::DelayedAutoResized() {
2002   gfx::Size new_size = new_auto_size_;
2003   // Clear the new_auto_size_ since the empty value is used as a flag to
2004   // indicate that no callback is in progress (i.e. without this line
2005   // DelayedAutoResized will not get called again).
2006   new_auto_size_.SetSize(0, 0);
2007   if (!auto_resize_enabled_)
2008     return;
2009
2010   OnRenderAutoResized(new_size);
2011 }
2012
2013 void RenderWidgetHostImpl::DetachDelegate() {
2014   delegate_ = NULL;
2015 }
2016
2017 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
2018   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2019   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2020                                GetLatencyComponentId(),
2021                                &window_snapshot_component)) {
2022     int sequence_number = static_cast<int>(
2023         window_snapshot_component.sequence_number);
2024 #if defined(OS_MACOSX)
2025     // On Mac, when using CoreAnmation, there is a delay between when content
2026     // is drawn to the screen, and when the snapshot will actually pick up
2027     // that content. Insert a manual delay of 1/6th of a second (to simulate
2028     // 10 frames at 60 fps) before actually taking the snapshot.
2029     base::MessageLoop::current()->PostDelayedTask(
2030         FROM_HERE,
2031         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2032                    weak_factory_.GetWeakPtr(),
2033                    sequence_number),
2034         base::TimeDelta::FromSecondsD(1. / 6));
2035 #else
2036     WindowSnapshotReachedScreen(sequence_number);
2037 #endif
2038   }
2039
2040   latency_tracker_.OnFrameSwapped(latency_info);
2041 }
2042
2043 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2044   view_->DidReceiveRendererFrame();
2045 }
2046
2047 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2048   DCHECK(base::MessageLoopForUI::IsCurrent());
2049
2050   gfx::Rect view_bounds = GetView()->GetViewBounds();
2051   gfx::Rect snapshot_bounds(view_bounds.size());
2052
2053   std::vector<unsigned char> png;
2054   if (ui::GrabViewSnapshot(
2055       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2056     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2057     return;
2058   }
2059
2060   ui::GrabViewSnapshotAsync(
2061       GetView()->GetNativeView(),
2062       snapshot_bounds,
2063       base::ThreadTaskRunnerHandle::Get(),
2064       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2065                  weak_factory_.GetWeakPtr(),
2066                  snapshot_id));
2067 }
2068
2069 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2070                                                   const unsigned char* data,
2071                                                   size_t size) {
2072   // Any pending snapshots with a lower ID than the one received are considered
2073   // to be implicitly complete, and returned the same snapshot data.
2074   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2075   while(it != pending_browser_snapshots_.end()) {
2076       if (it->first <= snapshot_id) {
2077         it->second.Run(data, size);
2078         pending_browser_snapshots_.erase(it++);
2079       } else {
2080         ++it;
2081       }
2082   }
2083 }
2084
2085 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2086     int snapshot_id,
2087     scoped_refptr<base::RefCountedBytes> png_data) {
2088   if (png_data.get())
2089     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2090   else
2091     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2092 }
2093
2094 // static
2095 void RenderWidgetHostImpl::CompositorFrameDrawn(
2096     const std::vector<ui::LatencyInfo>& latency_info) {
2097   for (size_t i = 0; i < latency_info.size(); i++) {
2098     std::set<RenderWidgetHostImpl*> rwhi_set;
2099     for (const auto& lc : latency_info[i].latency_components()) {
2100       if (lc.first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2101           lc.first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2102           lc.first.first == ui::TAB_SHOW_COMPONENT) {
2103         // Matches with GetLatencyComponentId
2104         int routing_id = lc.first.second & 0xffffffff;
2105         int process_id = (lc.first.second >> 32) & 0xffffffff;
2106         RenderWidgetHost* rwh =
2107             RenderWidgetHost::FromID(process_id, routing_id);
2108         if (!rwh) {
2109           continue;
2110         }
2111         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2112         if (rwhi_set.insert(rwhi).second)
2113           rwhi->FrameSwapped(latency_info[i]);
2114       }
2115     }
2116   }
2117 }
2118
2119 BrowserAccessibilityManager*
2120     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2121   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2122 }
2123
2124 BrowserAccessibilityManager*
2125     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2126   return delegate_ ?
2127       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2128 }
2129
2130 #if defined(OS_WIN)
2131 gfx::NativeViewAccessible
2132     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2133   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2134 }
2135 #endif
2136
2137 }  // namespace content