src/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/debug/trace_event.h"
  16 #include "base/i18n/rtl.h"
  17 #include "base/lazy_instance.h"
  18 #include "base/message_loop/message_loop.h"
  19 #include "base/metrics/field_trial.h"
  20 #include "base/metrics/histogram.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 "cc/base/switches.h"
  25 #include "cc/output/compositor_frame.h"
  26 #include "cc/output/compositor_frame_ack.h"
  27 #include "content/browser/accessibility/accessibility_mode_helper.h"
  28 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  29 #include "content/browser/gpu/compositor_util.h"
  30 #include "content/browser/gpu/gpu_process_host.h"
  31 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  32 #include "content/browser/gpu/gpu_surface_tracker.h"
  33 #include "content/browser/renderer_host/backing_store.h"
  34 #include "content/browser/renderer_host/backing_store_manager.h"
  35 #include "content/browser/renderer_host/dip_util.h"
  36 #include "content/browser/renderer_host/input/input_router_impl.h"
  37 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  38 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  39 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  40 #include "content/browser/renderer_host/input/timeout_monitor.h"
  41 #include "content/browser/renderer_host/overscroll_controller.h"
  42 #include "content/browser/renderer_host/render_process_host_impl.h"
  43 #include "content/browser/renderer_host/render_view_host_impl.h"
  44 #include "content/browser/renderer_host/render_widget_helper.h"
  45 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  46 #include "content/common/accessibility_messages.h"
  47 #include "content/common/content_constants_internal.h"
  48 #include "content/common/cursors/webcursor.h"
  49 #include "content/common/gpu/gpu_messages.h"
  50 #include "content/common/input_messages.h"
  51 #include "content/common/view_messages.h"
  52 #include "content/port/browser/render_widget_host_view_port.h"
  53 #include "content/public/browser/native_web_keyboard_event.h"
  54 #include "content/public/browser/notification_service.h"
  55 #include "content/public/browser/notification_types.h"
  56 #include "content/public/browser/render_widget_host_iterator.h"
  57 #include "content/public/browser/user_metrics.h"
  58 #include "content/public/common/content_constants.h"
  59 #include "content/public/common/content_switches.h"
  60 #include "content/public/common/result_codes.h"
  61 #include "skia/ext/image_operations.h"
  62 #include "skia/ext/platform_canvas.h"
  63 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  64 #include "ui/events/event.h"
  65 #include "ui/events/keycodes/keyboard_codes.h"
  66 #include "ui/gfx/size_conversions.h"
  67 #include "ui/gfx/skbitmap_operations.h"
  68 #include "ui/gfx/vector2d_conversions.h"
  69 #include "ui/snapshot/snapshot.h"
  70 #include "webkit/common/webpreferences.h"
  71
  72 #if defined(TOOLKIT_GTK)
  73 #include "content/browser/renderer_host/backing_store_gtk.h"
  74 #elif defined(OS_MACOSX)
  75 #include "content/browser/renderer_host/backing_store_mac.h"
  76 #elif defined(OS_WIN)
  77 #include "content/common/plugin_constants_win.h"
  78 #endif
  79
  80 using base::Time;
  81 using base::TimeDelta;
  82 using base::TimeTicks;
  83 using blink::WebGestureEvent;
  84 using blink::WebInputEvent;
  85 using blink::WebKeyboardEvent;
  86 using blink::WebMouseEvent;
  87 using blink::WebMouseWheelEvent;
  88 using blink::WebTextDirection;
  89
  90 namespace content {
  91 namespace {
  92
  93 bool g_check_for_pending_resize_ack = true;
  94
  95 // How long to (synchronously) wait for the renderer to respond with a
  96 // PaintRect message, when our backing-store is invalid, before giving up and
  97 // returning a null or incorrectly sized backing-store from GetBackingStore.
  98 // This timeout impacts the "choppiness" of our window resize perf.
  99 const int kPaintMsgTimeoutMS = 50;
 100
 101 typedef std::pair<int32, int32> RenderWidgetHostID;
 102 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
 103     RoutingIDWidgetMap;
 104 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 105     LAZY_INSTANCE_INITIALIZER;
 106
 107 int GetInputRouterViewFlagsFromCompositorFrameMetadata(
 108     const cc::CompositorFrameMetadata metadata) {
 109   int view_flags = InputRouter::VIEW_FLAGS_NONE;
 110
 111   if (metadata.min_page_scale_factor == metadata.max_page_scale_factor)
 112     view_flags |= InputRouter::FIXED_PAGE_SCALE;
 113
 114   const float window_width_dip =
 115       std::ceil(metadata.page_scale_factor * metadata.viewport_size.width());
 116   const float content_width_css = metadata.root_layer_size.width();
 117   if (content_width_css <= window_width_dip)
 118     view_flags |= InputRouter::MOBILE_VIEWPORT;
 119
 120   return view_flags;
 121 }
 122
 123 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 124 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 125 // iteration (or NULL if there isn't any left).
 126 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 127  public:
 128   RenderWidgetHostIteratorImpl()
 129       : current_index_(0) {
 130   }
 131
 132   virtual ~RenderWidgetHostIteratorImpl() {
 133   }
 134
 135   void Add(RenderWidgetHost* host) {
 136     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 137                                         host->GetRoutingID()));
 138   }
 139
 140   // RenderWidgetHostIterator:
 141   virtual RenderWidgetHost* GetNextHost() OVERRIDE {
 142     RenderWidgetHost* host = NULL;
 143     while (current_index_ < hosts_.size() && !host) {
 144       RenderWidgetHostID id = hosts_[current_index_];
 145       host = RenderWidgetHost::FromID(id.first, id.second);
 146       ++current_index_;
 147     }
 148     return host;
 149   }
 150
 151  private:
 152   std::vector<RenderWidgetHostID> hosts_;
 153   size_t current_index_;
 154
 155   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 156 };
 157
 158 }  // namespace
 159
 160
 161 // static
 162 size_t RenderWidgetHost::BackingStoreMemorySize() {
 163   return BackingStoreManager::MemorySize();
 164 }
 165
 166 ///////////////////////////////////////////////////////////////////////////////
 167 // RenderWidgetHostImpl
 168
 169 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 170                                            RenderProcessHost* process,
 171                                            int routing_id,
 172                                            bool hidden)
 173     : view_(NULL),
 174       renderer_initialized_(false),
 175       hung_renderer_delay_ms_(kHungRendererDelayMs),
 176       delegate_(delegate),
 177       process_(process),
 178       routing_id_(routing_id),
 179       surface_id_(0),
 180       is_loading_(false),
 181       is_hidden_(hidden),
 182       is_fullscreen_(false),
 183       is_accelerated_compositing_active_(false),
 184       repaint_ack_pending_(false),
 185       resize_ack_pending_(false),
 186       screen_info_out_of_date_(false),
 187       overdraw_bottom_height_(0.f),
 188       should_auto_resize_(false),
 189       waiting_for_screen_rects_ack_(false),
 190       accessibility_mode_(AccessibilityModeOff),
 191       needs_repainting_on_restore_(false),
 192       is_unresponsive_(false),
 193       in_flight_event_count_(0),
 194       in_get_backing_store_(false),
 195       abort_get_backing_store_(false),
 196       view_being_painted_(false),
 197       ignore_input_events_(false),
 198       input_method_active_(false),
 199       text_direction_updated_(false),
 200       text_direction_(blink::WebTextDirectionLeftToRight),
 201       text_direction_canceled_(false),
 202       suppress_next_char_events_(false),
 203       pending_mouse_lock_request_(false),
 204       allow_privileged_mouse_lock_(false),
 205       has_touch_handler_(false),
 206       weak_factory_(this),
 207       last_input_number_(static_cast<int64>(GetProcess()->GetID()) << 32) {
 208   CHECK(delegate_);
 209   if (routing_id_ == MSG_ROUTING_NONE) {
 210     routing_id_ = process_->GetNextRoutingID();
 211     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 212         process_->GetID(),
 213         routing_id_);
 214   } else {
 215     // TODO(piman): This is a O(N) lookup, where we could forward the
 216     // information from the RenderWidgetHelper. The problem is that doing so
 217     // currently leaks outside of content all the way to chrome classes, and
 218     // would be a layering violation. Since we don't expect more than a few
 219     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 220     // problem, for example by tracking in the RenderWidgetHelper the routing id
 221     // (and surface id) that have been created, but whose RWH haven't yet.
 222     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 223         process_->GetID(),
 224         routing_id_);
 225     DCHECK(surface_id_);
 226   }
 227
 228   is_threaded_compositing_enabled_ = IsThreadedCompositingEnabled();
 229
 230   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 231       g_routing_id_widget_map.Get().insert(std::make_pair(
 232           RenderWidgetHostID(process->GetID(), routing_id_), this));
 233   CHECK(result.second) << "Inserting a duplicate item!";
 234   process_->AddRoute(routing_id_, this);
 235
 236   // If we're initially visible, tell the process host that we're alive.
 237   // Otherwise we'll notify the process host when we are first shown.
 238   if (!hidden)
 239     process_->WidgetRestored();
 240
 241   accessibility_mode_ =
 242       BrowserAccessibilityStateImpl::GetInstance()->accessibility_mode();
 243
 244   input_router_.reset(new InputRouterImpl(process_, this, this, routing_id_));
 245
 246 #if defined(USE_AURA)
 247   bool overscroll_enabled = CommandLine::ForCurrentProcess()->
 248       GetSwitchValueASCII(switches::kOverscrollHistoryNavigation) != "0";
 249   SetOverscrollControllerEnabled(overscroll_enabled);
 250 #endif
 251
 252   if (GetProcess()->IsGuest() || !CommandLine::ForCurrentProcess()->HasSwitch(
 253           switches::kDisableHangMonitor)) {
 254     hang_monitor_timeout_.reset(new TimeoutMonitor(
 255         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 256                    weak_factory_.GetWeakPtr())));
 257   }
 258 }
 259
 260 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 261   SetView(NULL);
 262
 263   // Clear our current or cached backing store if either remains.
 264   BackingStoreManager::RemoveBackingStore(this);
 265
 266   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 267   surface_id_ = 0;
 268
 269   process_->RemoveRoute(routing_id_);
 270   g_routing_id_widget_map.Get().erase(
 271       RenderWidgetHostID(process_->GetID(), routing_id_));
 272
 273   if (delegate_)
 274     delegate_->RenderWidgetDeleted(this);
 275 }
 276
 277 // static
 278 RenderWidgetHost* RenderWidgetHost::FromID(
 279     int32 process_id,
 280     int32 routing_id) {
 281   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 282 }
 283
 284 // static
 285 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 286     int32 process_id,
 287     int32 routing_id) {
 288   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 289   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 290   RoutingIDWidgetMap::iterator it = widgets->find(
 291       RenderWidgetHostID(process_id, routing_id));
 292   return it == widgets->end() ? NULL : it->second;
 293 }
 294
 295 // static
 296 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 297   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 298   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 299   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 300        it != widgets->end();
 301        ++it) {
 302     RenderWidgetHost* widget = it->second;
 303
 304     if (!widget->IsRenderView()) {
 305       hosts->Add(widget);
 306       continue;
 307     }
 308
 309     // Add only active RenderViewHosts.
 310     RenderViewHost* rvh = RenderViewHost::From(widget);
 311     if (RenderViewHostImpl::IsRVHStateActive(
 312             static_cast<RenderViewHostImpl*>(rvh)->rvh_state()))
 313       hosts->Add(widget);
 314   }
 315
 316   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 317 }
 318
 319 // static
 320 scoped_ptr<RenderWidgetHostIterator>
 321 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 322   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 323   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 324   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 325        it != widgets->end();
 326        ++it) {
 327     hosts->Add(it->second);
 328   }
 329
 330   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 331 }
 332
 333 // static
 334 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 335   return rwh->AsRenderWidgetHostImpl();
 336 }
 337
 338 void RenderWidgetHostImpl::SetView(RenderWidgetHostView* view) {
 339   view_ = RenderWidgetHostViewPort::FromRWHV(view);
 340
 341   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 342       surface_id_, GetCompositingSurface());
 343
 344   synthetic_gesture_controller_.reset();
 345 }
 346
 347 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 348   return process_;
 349 }
 350
 351 int RenderWidgetHostImpl::GetRoutingID() const {
 352   return routing_id_;
 353 }
 354
 355 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 356   return view_;
 357 }
 358
 359 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 360   return this;
 361 }
 362
 363 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 364   if (view_)
 365     return view_->GetNativeViewId();
 366   return 0;
 367 }
 368
 369 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 370   if (view_)
 371     return view_->GetCompositingSurface();
 372   return gfx::GLSurfaceHandle();
 373 }
 374
 375 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 376   resize_ack_pending_ = false;
 377   if (repaint_ack_pending_) {
 378     TRACE_EVENT_ASYNC_END0(
 379         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 380   }
 381   repaint_ack_pending_ = false;
 382   last_requested_size_.SetSize(0, 0);
 383 }
 384
 385 void RenderWidgetHostImpl::SendScreenRects() {
 386   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 387     return;
 388
 389   if (is_hidden_) {
 390     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 391     // happens on Win & Mac, and when the view is shown it'll call this again.
 392     return;
 393   }
 394
 395   if (!view_)
 396     return;
 397
 398   last_view_screen_rect_ = view_->GetViewBounds();
 399   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 400   Send(new ViewMsg_UpdateScreenRects(
 401       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 402   if (delegate_)
 403     delegate_->DidSendScreenRects(this);
 404   waiting_for_screen_rects_ack_ = true;
 405 }
 406
 407 void RenderWidgetHostImpl::SetOverscrollControllerEnabled(bool enabled) {
 408   if (!enabled)
 409     overscroll_controller_.reset();
 410   else if (!overscroll_controller_)
 411     overscroll_controller_.reset(new OverscrollController());
 412 }
 413
 414 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 415   suppress_next_char_events_ = true;
 416 }
 417
 418 void RenderWidgetHostImpl::FlushInput() {
 419   input_router_->Flush();
 420   if (synthetic_gesture_controller_)
 421     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 422 }
 423
 424 void RenderWidgetHostImpl::SetNeedsFlush() {
 425   if (view_)
 426     view_->OnSetNeedsFlushInput();
 427 }
 428
 429 void RenderWidgetHostImpl::Init() {
 430   DCHECK(process_->HasConnection());
 431
 432   renderer_initialized_ = true;
 433
 434   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 435       surface_id_, GetCompositingSurface());
 436
 437   // Send the ack along with the information on placement.
 438   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 439   GetProcess()->ResumeRequestsForView(routing_id_);
 440
 441   WasResized();
 442 }
 443
 444 void RenderWidgetHostImpl::Shutdown() {
 445   RejectMouseLockOrUnlockIfNecessary();
 446
 447   if (process_->HasConnection()) {
 448     // Tell the renderer object to close.
 449     bool rv = Send(new ViewMsg_Close(routing_id_));
 450     DCHECK(rv);
 451   }
 452
 453   Destroy();
 454 }
 455
 456 bool RenderWidgetHostImpl::IsLoading() const {
 457   return is_loading_;
 458 }
 459
 460 bool RenderWidgetHostImpl::IsRenderView() const {
 461   return false;
 462 }
 463
 464 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 465   bool handled = true;
 466   bool msg_is_ok = true;
 467   IPC_BEGIN_MESSAGE_MAP_EX(RenderWidgetHostImpl, msg, msg_is_ok)
 468     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 469                         OnQueueSyntheticGesture)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 471     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderProcessGone, OnRenderProcessGone)
 472     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 473     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 474                         OnUpdateScreenRectsAck)
 475     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 476     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 477     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 478                                 msg_is_ok = OnSwapCompositorFrame(msg))
 479     IPC_MESSAGE_HANDLER(ViewHostMsg_DidOverscroll, OnOverscrolled)
 480     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
 481     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 482     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateIsDelayed, OnUpdateIsDelayed)
 483     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 484     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 485     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 486     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
 487                         OnTextInputTypeChanged)
 488     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCancelComposition,
 489                         OnImeCancelComposition)
 490     IPC_MESSAGE_HANDLER(ViewHostMsg_DidActivateAcceleratedCompositing,
 491                         OnDidActivateAcceleratedCompositing)
 492     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 493     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 494     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 495                         OnShowDisambiguationPopup)
 496     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 497     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 498                         OnSelectionBoundsChanged)
 499     IPC_MESSAGE_HANDLER(ViewHostMsg_Snapshot, OnSnapshot)
 500 #if defined(OS_WIN)
 501     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 502                         OnWindowlessPluginDummyWindowCreated)
 503     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 504                         OnWindowlessPluginDummyWindowDestroyed)
 505 #endif
 506 #if defined(OS_MACOSX)
 507     IPC_MESSAGE_HANDLER(ViewHostMsg_CompositorSurfaceBuffersSwapped,
 508                         OnCompositorSurfaceBuffersSwapped)
 509 #endif
 510 #if defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_AURA)
 511     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCompositionRangeChanged,
 512                         OnImeCompositionRangeChanged)
 513 #endif
 514     IPC_MESSAGE_UNHANDLED(handled = false)
 515   IPC_END_MESSAGE_MAP_EX()
 516
 517   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 518     return true;
 519
 520   if (!handled && view_ && view_->OnMessageReceived(msg))
 521     return true;
 522
 523   if (!msg_is_ok) {
 524     // The message de-serialization failed. Kill the renderer process.
 525     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH"));
 526     GetProcess()->ReceivedBadMessage();
 527   }
 528   return handled;
 529 }
 530
 531 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 532   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 533     return input_router_->SendInput(make_scoped_ptr(msg));
 534
 535   return process_->Send(msg);
 536 }
 537
 538 void RenderWidgetHostImpl::WasHidden() {
 539   if (is_hidden_)
 540     return;
 541
 542   is_hidden_ = true;
 543
 544   // Don't bother reporting hung state when we aren't active.
 545   StopHangMonitorTimeout();
 546
 547   // If we have a renderer, then inform it that we are being hidden so it can
 548   // reduce its resource utilization.
 549   Send(new ViewMsg_WasHidden(routing_id_));
 550
 551   // Tell the RenderProcessHost we were hidden.
 552   process_->WidgetHidden();
 553
 554   bool is_visible = false;
 555   NotificationService::current()->Notify(
 556       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 557       Source<RenderWidgetHost>(this),
 558       Details<bool>(&is_visible));
 559 }
 560
 561 void RenderWidgetHostImpl::WasShown() {
 562   if (!is_hidden_)
 563     return;
 564   is_hidden_ = false;
 565
 566   SendScreenRects();
 567
 568   BackingStore* backing_store = BackingStoreManager::Lookup(this);
 569   // If we already have a backing store for this widget, then we don't need to
 570   // repaint on restore _unless_ we know that our backing store is invalid.
 571   // When accelerated compositing is on, we must always repaint, even when
 572   // the backing store exists.
 573   bool needs_repainting;
 574   if (needs_repainting_on_restore_ || !backing_store ||
 575       is_accelerated_compositing_active()) {
 576     needs_repainting = true;
 577     needs_repainting_on_restore_ = false;
 578   } else {
 579     needs_repainting = false;
 580   }
 581   Send(new ViewMsg_WasShown(routing_id_, needs_repainting));
 582
 583   process_->WidgetRestored();
 584
 585   bool is_visible = true;
 586   NotificationService::current()->Notify(
 587       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 588       Source<RenderWidgetHost>(this),
 589       Details<bool>(&is_visible));
 590
 591   // It's possible for our size to be out of sync with the renderer. The
 592   // following is one case that leads to this:
 593   // 1. WasResized -> Send ViewMsg_Resize to render
 594   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 595   // 3. WasHidden
 596   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 597   //    is hidden. Now renderer/browser out of sync with what they think size
 598   //    is.
 599   // By invoking WasResized the renderer is updated as necessary. WasResized
 600   // does nothing if the sizes are already in sync.
 601   //
 602   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 603   // could handle both the restore and resize at once. This isn't that big a
 604   // deal as RenderWidget::WasShown delays updating, so that the resize from
 605   // WasResized is usually processed before the renderer is painted.
 606   WasResized();
 607 }
 608
 609 void RenderWidgetHostImpl::WasResized() {
 610   // Skip if the |delegate_| has already been detached because
 611   // it's web contents is being deleted.
 612   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 613       !renderer_initialized_ || should_auto_resize_ || !delegate_) {
 614     return;
 615   }
 616
 617   gfx::Rect view_bounds = view_->GetViewBounds();
 618   gfx::Size new_size(view_bounds.size());
 619
 620   gfx::Size old_physical_backing_size = physical_backing_size_;
 621   physical_backing_size_ = view_->GetPhysicalBackingSize();
 622   bool was_fullscreen = is_fullscreen_;
 623   is_fullscreen_ = IsFullscreen();
 624   float old_overdraw_bottom_height = overdraw_bottom_height_;
 625   overdraw_bottom_height_ = view_->GetOverdrawBottomHeight();
 626
 627   bool size_changed = new_size != last_requested_size_;
 628   bool side_payload_changed =
 629       screen_info_out_of_date_ ||
 630       old_physical_backing_size != physical_backing_size_ ||
 631       was_fullscreen != is_fullscreen_ ||
 632       old_overdraw_bottom_height != overdraw_bottom_height_;
 633
 634   if (!size_changed && !side_payload_changed)
 635     return;
 636
 637   if (!screen_info_) {
 638     screen_info_.reset(new blink::WebScreenInfo);
 639     GetWebScreenInfo(screen_info_.get());
 640   }
 641
 642   // We don't expect to receive an ACK when the requested size or the physical
 643   // backing size is empty, or when the main viewport size didn't change.
 644   if (!new_size.IsEmpty() && !physical_backing_size_.IsEmpty() && size_changed)
 645     resize_ack_pending_ = g_check_for_pending_resize_ack;
 646
 647   ViewMsg_Resize_Params params;
 648   params.screen_info = *screen_info_;
 649   params.new_size = new_size;
 650   params.physical_backing_size = physical_backing_size_;
 651   params.overdraw_bottom_height = overdraw_bottom_height_;
 652   params.resizer_rect = GetRootWindowResizerRect();
 653   params.is_fullscreen = is_fullscreen_;
 654   if (!Send(new ViewMsg_Resize(routing_id_, params))) {
 655     resize_ack_pending_ = false;
 656   } else {
 657     last_requested_size_ = new_size;
 658   }
 659 }
 660
 661 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 662   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 663 }
 664
 665 void RenderWidgetHostImpl::GotFocus() {
 666   Focus();
 667 }
 668
 669 void RenderWidgetHostImpl::Focus() {
 670   Send(new InputMsg_SetFocus(routing_id_, true));
 671 }
 672
 673 void RenderWidgetHostImpl::Blur() {
 674   // If there is a pending mouse lock request, we don't want to reject it at
 675   // this point. The user can switch focus back to this view and approve the
 676   // request later.
 677   if (IsMouseLocked())
 678     view_->UnlockMouse();
 679
 680   // If there is a pending overscroll, then that should be cancelled.
 681   if (overscroll_controller_)
 682     overscroll_controller_->Cancel();
 683
 684   Send(new InputMsg_SetFocus(routing_id_, false));
 685 }
 686
 687 void RenderWidgetHostImpl::LostCapture() {
 688   Send(new InputMsg_MouseCaptureLost(routing_id_));
 689 }
 690
 691 void RenderWidgetHostImpl::SetActive(bool active) {
 692   Send(new ViewMsg_SetActive(routing_id_, active));
 693 }
 694
 695 void RenderWidgetHostImpl::LostMouseLock() {
 696   Send(new ViewMsg_MouseLockLost(routing_id_));
 697 }
 698
 699 void RenderWidgetHostImpl::ViewDestroyed() {
 700   RejectMouseLockOrUnlockIfNecessary();
 701
 702   // TODO(evanm): tracking this may no longer be necessary;
 703   // eliminate this function if so.
 704   SetView(NULL);
 705 }
 706
 707 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 708   is_loading_ = is_loading;
 709   if (!view_)
 710     return;
 711   view_->SetIsLoading(is_loading);
 712 }
 713
 714 void RenderWidgetHostImpl::CopyFromBackingStore(
 715     const gfx::Rect& src_subrect,
 716     const gfx::Size& accelerated_dst_size,
 717     const base::Callback<void(bool, const SkBitmap&)>& callback,
 718     const SkBitmap::Config& bitmap_config) {
 719   if (view_ && is_accelerated_compositing_active_) {
 720     TRACE_EVENT0("browser",
 721         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 722     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 723         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 724     view_->CopyFromCompositingSurface(
 725         accelerated_copy_rect, accelerated_dst_size, callback, bitmap_config);
 726     return;
 727   }
 728
 729   BackingStore* backing_store = GetBackingStore(false);
 730   if (!backing_store) {
 731     callback.Run(false, SkBitmap());
 732     return;
 733   }
 734
 735   TRACE_EVENT0("browser",
 736       "RenderWidgetHostImpl::CopyFromBackingStore::FromBackingStore");
 737   gfx::Rect copy_rect = src_subrect.IsEmpty() ?
 738       gfx::Rect(backing_store->size()) : src_subrect;
 739   // When the result size is equal to the backing store size, copy from the
 740   // backing store directly to the output canvas.
 741   skia::PlatformBitmap output;
 742   bool result = backing_store->CopyFromBackingStore(copy_rect, &output);
 743   callback.Run(result, output.GetBitmap());
 744 }
 745
 746 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 747   if (view_)
 748     return view_->IsSurfaceAvailableForCopy();
 749   return false;
 750 }
 751
 752 #if defined(OS_ANDROID)
 753 void RenderWidgetHostImpl::LockBackingStore() {
 754   if (view_)
 755     view_->LockCompositingSurface();
 756 }
 757
 758 void RenderWidgetHostImpl::UnlockBackingStore() {
 759   if (view_)
 760     view_->UnlockCompositingSurface();
 761 }
 762 #endif
 763
 764 #if defined(TOOLKIT_GTK)
 765 bool RenderWidgetHostImpl::CopyFromBackingStoreToGtkWindow(
 766     const gfx::Rect& dest_rect, GdkWindow* target) {
 767   BackingStore* backing_store = GetBackingStore(false);
 768   if (!backing_store)
 769     return false;
 770   (static_cast<BackingStoreGtk*>(backing_store))->PaintToRect(
 771       dest_rect, target);
 772   return true;
 773 }
 774 #elif defined(OS_MACOSX)
 775 gfx::Size RenderWidgetHostImpl::GetBackingStoreSize() {
 776   BackingStore* backing_store = GetBackingStore(false);
 777   return backing_store ? backing_store->size() : gfx::Size();
 778 }
 779
 780 bool RenderWidgetHostImpl::CopyFromBackingStoreToCGContext(
 781     const CGRect& dest_rect, CGContextRef target) {
 782   BackingStore* backing_store = GetBackingStore(false);
 783   if (!backing_store)
 784     return false;
 785   (static_cast<BackingStoreMac*>(backing_store))->
 786       CopyFromBackingStoreToCGContext(dest_rect, target);
 787   return true;
 788 }
 789 #endif
 790
 791 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 792   TRACE_EVENT0("browser",
 793       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 794
 795   // Do not pause if the view is hidden.
 796   if (is_hidden())
 797     return;
 798
 799   // Do not pause if there is not a paint or resize already coming.
 800   if (!repaint_ack_pending_ && !resize_ack_pending_ && !view_being_painted_)
 801     return;
 802
 803   // Waiting for a backing store will do the wait for us.
 804   ignore_result(GetBackingStore(true));
 805 }
 806
 807 bool RenderWidgetHostImpl::TryGetBackingStore(const gfx::Size& desired_size,
 808                                               BackingStore** backing_store) {
 809   // Check if the view has an accelerated surface of the desired size.
 810   if (view_->HasAcceleratedSurface(desired_size)) {
 811     *backing_store = NULL;
 812     return true;
 813   }
 814
 815   // Check for a software backing store of the desired size.
 816   *backing_store = BackingStoreManager::GetBackingStore(this, desired_size);
 817   return !!*backing_store;
 818 }
 819
 820 BackingStore* RenderWidgetHostImpl::GetBackingStore(bool force_create) {
 821   TRACE_EVENT1("browser", "RenderWidgetHostImpl::GetBackingStore",
 822                "force_create", force_create);
 823
 824   if (!view_)
 825     return NULL;
 826
 827   // The view_size will be current_size_ for auto-sized views and otherwise the
 828   // size of the view_. (For auto-sized views, current_size_ is updated during
 829   // UpdateRect messages.)
 830   gfx::Size view_size = current_size_;
 831   if (!should_auto_resize_) {
 832     // Get the desired size from the current view bounds.
 833     gfx::Rect view_rect = view_->GetViewBounds();
 834     if (view_rect.IsEmpty())
 835       return NULL;
 836     view_size = view_rect.size();
 837   }
 838
 839   TRACE_EVENT2("renderer_host", "RenderWidgetHostImpl::GetBackingStore",
 840                "width", base::IntToString(view_size.width()),
 841                "height", base::IntToString(view_size.height()));
 842
 843   // We should not be asked to paint while we are hidden.  If we are hidden,
 844   // then it means that our consumer failed to call WasShown. If we're not
 845   // force creating the backing store, it's OK since we can feel free to give
 846   // out our cached one if we have it.
 847   DCHECK(!is_hidden_ || !force_create) <<
 848       "GetBackingStore called while hidden!";
 849
 850   // We should never be called recursively; this can theoretically lead to
 851   // infinite recursion and almost certainly leads to lower performance.
 852   DCHECK(!in_get_backing_store_) << "GetBackingStore called recursively!";
 853   base::AutoReset<bool> auto_reset_in_get_backing_store(
 854       &in_get_backing_store_, true);
 855
 856   // We might have a cached backing store that we can reuse!
 857   BackingStore* backing_store = NULL;
 858   if (TryGetBackingStore(view_size, &backing_store) || !force_create)
 859     return backing_store;
 860
 861   // We do not have a suitable backing store in the cache, so send out a
 862   // request to the renderer to paint the view if required.
 863   if (!repaint_ack_pending_ && !resize_ack_pending_ && !view_being_painted_) {
 864     repaint_start_time_ = TimeTicks::Now();
 865     repaint_ack_pending_ = true;
 866     TRACE_EVENT_ASYNC_BEGIN0(
 867         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 868     Send(new ViewMsg_Repaint(routing_id_, view_size));
 869   }
 870
 871   TimeDelta max_delay = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 872   TimeTicks end_time = TimeTicks::Now() + max_delay;
 873   do {
 874     TRACE_EVENT0("renderer_host", "GetBackingStore::WaitForUpdate");
 875
 876     // When we have asked the RenderWidget to resize, and we are still waiting
 877     // on a response, block for a little while to see if we can't get a response
 878     // before returning the old (incorrectly sized) backing store.
 879     IPC::Message msg;
 880     if (process_->WaitForBackingStoreMsg(routing_id_, max_delay, &msg)) {
 881       OnMessageReceived(msg);
 882
 883       // For auto-resized views, current_size_ determines the view_size and it
 884       // may have changed during the handling of an UpdateRect message.
 885       if (should_auto_resize_)
 886         view_size = current_size_;
 887
 888       // Break now if we got a backing store or accelerated surface of the
 889       // correct size.
 890       if (TryGetBackingStore(view_size, &backing_store) ||
 891           abort_get_backing_store_) {
 892         abort_get_backing_store_ = false;
 893         return backing_store;
 894       }
 895     } else {
 896       TRACE_EVENT0("renderer_host", "GetBackingStore::Timeout");
 897       break;
 898     }
 899
 900     // Loop if we still have time left and haven't gotten a properly sized
 901     // BackingStore yet. This is necessary to support the GPU path which
 902     // typically has multiple frames pipelined -- we may need to skip one or two
 903     // BackingStore messages to get to the latest.
 904     max_delay = end_time - TimeTicks::Now();
 905   } while (max_delay > TimeDelta::FromSeconds(0));
 906
 907   // We have failed to get a backing store of view_size. Fall back on
 908   // current_size_ to avoid a white flash while resizing slow pages.
 909   if (view_size != current_size_)
 910     TryGetBackingStore(current_size_, &backing_store);
 911   return backing_store;
 912 }
 913
 914 BackingStore* RenderWidgetHostImpl::AllocBackingStore(const gfx::Size& size) {
 915   if (!view_)
 916     return NULL;
 917   return view_->AllocBackingStore(size);
 918 }
 919
 920 void RenderWidgetHostImpl::DonePaintingToBackingStore() {
 921   Send(new ViewMsg_UpdateRect_ACK(GetRoutingID()));
 922 }
 923
 924 bool RenderWidgetHostImpl::ScheduleComposite() {
 925   if (is_hidden_ || !is_accelerated_compositing_active_ ||
 926       current_size_.IsEmpty() || repaint_ack_pending_ ||
 927       resize_ack_pending_ || view_being_painted_) {
 928     return false;
 929   }
 930
 931   // Send out a request to the renderer to paint the view if required.
 932   repaint_start_time_ = TimeTicks::Now();
 933   repaint_ack_pending_ = true;
 934   TRACE_EVENT_ASYNC_BEGIN0(
 935       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 936   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 937   return true;
 938 }
 939
 940 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 941   if (hang_monitor_timeout_)
 942     hang_monitor_timeout_->Start(delay);
 943 }
 944
 945 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 946   if (hang_monitor_timeout_)
 947     hang_monitor_timeout_->Restart(
 948         base::TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
 949 }
 950
 951 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 952   if (hang_monitor_timeout_)
 953     hang_monitor_timeout_->Stop();
 954   RendererIsResponsive();
 955 }
 956
 957 void RenderWidgetHostImpl::EnableFullAccessibilityMode() {
 958   AddAccessibilityMode(AccessibilityModeComplete);
 959 }
 960
 961 bool RenderWidgetHostImpl::IsFullAccessibilityModeForTesting() {
 962   return accessibility_mode() == AccessibilityModeComplete;
 963 }
 964
 965 void RenderWidgetHostImpl::EnableTreeOnlyAccessibilityMode() {
 966   AddAccessibilityMode(AccessibilityModeTreeOnly);
 967 }
 968
 969 bool RenderWidgetHostImpl::IsTreeOnlyAccessibilityModeForTesting() {
 970   return accessibility_mode() == AccessibilityModeTreeOnly;
 971 }
 972
 973 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 974   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 975 }
 976
 977 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 978       const blink::WebMouseEvent& mouse_event,
 979       const ui::LatencyInfo& ui_latency) {
 980   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 981                "x", mouse_event.x, "y", mouse_event.y);
 982
 983   ui::LatencyInfo latency_info =
 984       CreateRWHLatencyInfoIfNotExist(&ui_latency, mouse_event.type);
 985
 986   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 987     if (mouse_event_callbacks_[i].Run(mouse_event))
 988       return;
 989   }
 990
 991   if (IgnoreInputEvents())
 992     return;
 993
 994   input_router_->SendMouseEvent(MouseEventWithLatencyInfo(mouse_event,
 995                                                           latency_info));
 996 }
 997
 998 void RenderWidgetHostImpl::OnPointerEventActivate() {
 999 }
1000
1001 void RenderWidgetHostImpl::ForwardWheelEvent(
1002     const WebMouseWheelEvent& wheel_event) {
1003   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
1004 }
1005
1006 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
1007       const blink::WebMouseWheelEvent& wheel_event,
1008       const ui::LatencyInfo& ui_latency) {
1009   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
1010
1011   ui::LatencyInfo latency_info =
1012       CreateRWHLatencyInfoIfNotExist(&ui_latency, wheel_event.type);
1013
1014   if (IgnoreInputEvents())
1015     return;
1016
1017   input_router_->SendWheelEvent(MouseWheelEventWithLatencyInfo(wheel_event,
1018                                                                latency_info));
1019 }
1020
1021 void RenderWidgetHostImpl::ForwardGestureEvent(
1022     const blink::WebGestureEvent& gesture_event) {
1023   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
1024 }
1025
1026 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
1027     const blink::WebGestureEvent& gesture_event,
1028     const ui::LatencyInfo& ui_latency) {
1029   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
1030   // Early out if necessary, prior to performing latency logic.
1031   if (IgnoreInputEvents())
1032     return;
1033
1034   if (delegate_->PreHandleGestureEvent(gesture_event))
1035     return;
1036
1037   ui::LatencyInfo latency_info =
1038       CreateRWHLatencyInfoIfNotExist(&ui_latency, gesture_event.type);
1039
1040   if (gesture_event.type == blink::WebInputEvent::GestureScrollUpdate) {
1041     latency_info.AddLatencyNumber(
1042         ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_RWH_COMPONENT,
1043         GetLatencyComponentId(),
1044         ++last_input_number_);
1045
1046     // Make a copy of the INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT with a
1047     // different name INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT.
1048     // So we can track the latency specifically for scroll update events.
1049     ui::LatencyInfo::LatencyComponent original_component;
1050     if (latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
1051                                  0,
1052                                  &original_component)) {
1053       latency_info.AddLatencyNumberWithTimestamp(
1054           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
1055           GetLatencyComponentId(),
1056           original_component.sequence_number,
1057           original_component.event_time,
1058           original_component.event_count);
1059     }
1060   }
1061
1062   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, latency_info);
1063   input_router_->SendGestureEvent(gesture_with_latency);
1064 }
1065
1066 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
1067       const blink::WebTouchEvent& touch_event,
1068       const ui::LatencyInfo& ui_latency) {
1069   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
1070
1071   // Always forward TouchEvents for touch stream consistency. They will be
1072   // ignored if appropriate in FilterInputEvent().
1073
1074   ui::LatencyInfo latency_info =
1075       CreateRWHLatencyInfoIfNotExist(&ui_latency, touch_event.type);
1076   TouchEventWithLatencyInfo touch_with_latency(touch_event, latency_info);
1077   input_router_->SendTouchEvent(touch_with_latency);
1078 }
1079
1080 void RenderWidgetHostImpl::ForwardKeyboardEvent(
1081     const NativeWebKeyboardEvent& key_event) {
1082   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
1083   if (IgnoreInputEvents())
1084     return;
1085
1086   if (!process_->HasConnection())
1087     return;
1088
1089   // First, let keypress listeners take a shot at handling the event.  If a
1090   // listener handles the event, it should not be propagated to the renderer.
1091   if (KeyPressListenersHandleEvent(key_event)) {
1092     // Some keypresses that are accepted by the listener might have follow up
1093     // char events, which should be ignored.
1094     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1095       suppress_next_char_events_ = true;
1096     return;
1097   }
1098
1099   if (key_event.type == WebKeyboardEvent::Char &&
1100       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1101        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1102     OnUserGesture();
1103   }
1104
1105   // Double check the type to make sure caller hasn't sent us nonsense that
1106   // will mess up our key queue.
1107   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1108     return;
1109
1110   if (suppress_next_char_events_) {
1111     // If preceding RawKeyDown event was handled by the browser, then we need
1112     // suppress all Char events generated by it. Please note that, one
1113     // RawKeyDown event may generate multiple Char events, so we can't reset
1114     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1115     if (key_event.type == WebKeyboardEvent::Char)
1116       return;
1117     // We get a KeyUp or a RawKeyDown event.
1118     suppress_next_char_events_ = false;
1119   }
1120
1121   bool is_shortcut = false;
1122
1123   // Only pre-handle the key event if it's not handled by the input method.
1124   if (delegate_ && !key_event.skip_in_browser) {
1125     // We need to set |suppress_next_char_events_| to true if
1126     // PreHandleKeyboardEvent() returns true, but |this| may already be
1127     // destroyed at that time. So set |suppress_next_char_events_| true here,
1128     // then revert it afterwards when necessary.
1129     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1130       suppress_next_char_events_ = true;
1131
1132     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1133     // a hung/malicious renderer from interfering.
1134     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1135       return;
1136
1137     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1138       suppress_next_char_events_ = false;
1139   }
1140
1141   input_router_->SendKeyboardEvent(
1142       key_event,
1143       CreateRWHLatencyInfoIfNotExist(NULL, key_event.type),
1144       is_shortcut);
1145 }
1146
1147 void RenderWidgetHostImpl::QueueSyntheticGesture(
1148     scoped_ptr<SyntheticGesture> synthetic_gesture,
1149     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1150   if (!synthetic_gesture_controller_ && view_) {
1151     synthetic_gesture_controller_.reset(
1152         new SyntheticGestureController(
1153             view_->CreateSyntheticGestureTarget().Pass()));
1154   }
1155   if (synthetic_gesture_controller_) {
1156     synthetic_gesture_controller_->QueueSyntheticGesture(
1157         synthetic_gesture.Pass(), on_complete);
1158   }
1159 }
1160
1161 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1162   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1163 }
1164
1165 int64 RenderWidgetHostImpl::GetLatencyComponentId() {
1166   return GetRoutingID() | (static_cast<int64>(GetProcess()->GetID()) << 32);
1167 }
1168
1169 // static
1170 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1171   g_check_for_pending_resize_ack = false;
1172 }
1173
1174 ui::LatencyInfo RenderWidgetHostImpl::CreateRWHLatencyInfoIfNotExist(
1175     const ui::LatencyInfo* original, WebInputEvent::Type type) {
1176   ui::LatencyInfo info;
1177   if (original)
1178     info = *original;
1179   // In Aura, gesture event will already carry its original touch event's
1180   // INPUT_EVENT_LATENCY_RWH_COMPONENT.
1181   if (!info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
1182                         GetLatencyComponentId(),
1183                         NULL)) {
1184     info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
1185                           GetLatencyComponentId(),
1186                           ++last_input_number_);
1187     info.TraceEventType(WebInputEventTraits::GetName(type));
1188   }
1189   return info;
1190 }
1191
1192
1193 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1194     const KeyPressEventCallback& callback) {
1195   key_press_event_callbacks_.push_back(callback);
1196 }
1197
1198 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1199     const KeyPressEventCallback& callback) {
1200   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1201     if (key_press_event_callbacks_[i].Equals(callback)) {
1202       key_press_event_callbacks_.erase(
1203           key_press_event_callbacks_.begin() + i);
1204       return;
1205     }
1206   }
1207 }
1208
1209 void RenderWidgetHostImpl::AddMouseEventCallback(
1210     const MouseEventCallback& callback) {
1211   mouse_event_callbacks_.push_back(callback);
1212 }
1213
1214 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1215     const MouseEventCallback& callback) {
1216   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1217     if (mouse_event_callbacks_[i].Equals(callback)) {
1218       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1219       return;
1220     }
1221   }
1222 }
1223
1224 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1225   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1226   if (GetView())
1227     static_cast<RenderWidgetHostViewPort*>(GetView())->GetScreenInfo(result);
1228   else
1229     RenderWidgetHostViewPort::GetDefaultScreenInfo(result);
1230   screen_info_out_of_date_ = false;
1231 }
1232
1233 const NativeWebKeyboardEvent*
1234     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1235   return input_router_->GetLastKeyboardEvent();
1236 }
1237
1238 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1239   // The resize message (which may not happen immediately) will carry with it
1240   // the screen info as well as the new size (if the screen has changed scale
1241   // factor).
1242   InvalidateScreenInfo();
1243   WasResized();
1244 }
1245
1246 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1247   screen_info_out_of_date_ = true;
1248   screen_info_.reset();
1249 }
1250
1251 void RenderWidgetHostImpl::GetSnapshotFromRenderer(
1252     const gfx::Rect& src_subrect,
1253     const base::Callback<void(bool, const SkBitmap&)>& callback) {
1254   TRACE_EVENT0("browser", "RenderWidgetHostImpl::GetSnapshotFromRenderer");
1255   if (!view_) {
1256     callback.Run(false, SkBitmap());
1257     return;
1258   }
1259
1260   pending_snapshots_.push(callback);
1261
1262   gfx::Rect copy_rect = src_subrect.IsEmpty() ?
1263       gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
1264
1265   gfx::Rect copy_rect_in_pixel = ConvertViewRectToPixel(view_, copy_rect);
1266   Send(new ViewMsg_Snapshot(GetRoutingID(), copy_rect_in_pixel));
1267 }
1268
1269 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1270                                               size_t offset,
1271                                               const gfx::Range& range) {
1272   if (view_)
1273     view_->SelectionChanged(text, offset, range);
1274 }
1275
1276 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1277     const ViewHostMsg_SelectionBounds_Params& params) {
1278   if (view_) {
1279     view_->SelectionBoundsChanged(params);
1280   }
1281 }
1282
1283 void RenderWidgetHostImpl::OnSnapshot(bool success,
1284                                     const SkBitmap& bitmap) {
1285   if (pending_snapshots_.size() == 0) {
1286     LOG(ERROR) << "RenderWidgetHostImpl::OnSnapshot: "
1287                   "Received a snapshot that was not requested.";
1288     return;
1289   }
1290
1291   base::Callback<void(bool, const SkBitmap&)> callback =
1292       pending_snapshots_.front();
1293   pending_snapshots_.pop();
1294
1295   if (!success) {
1296     callback.Run(success, SkBitmap());
1297     return;
1298   }
1299
1300   callback.Run(success, bitmap);
1301 }
1302
1303 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1304                                                  base::TimeDelta interval) {
1305   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1306 }
1307
1308 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1309                                           int exit_code) {
1310   // Clearing this flag causes us to re-create the renderer when recovering
1311   // from a crashed renderer.
1312   renderer_initialized_ = false;
1313
1314   waiting_for_screen_rects_ack_ = false;
1315
1316   // Reset to ensure that input routing works with a new renderer.
1317   input_router_.reset(new InputRouterImpl(process_, this, this, routing_id_));
1318
1319   if (overscroll_controller_)
1320     overscroll_controller_->Reset();
1321
1322  // Must reset these to ensure that keyboard events work with a new renderer.
1323   suppress_next_char_events_ = false;
1324
1325   // Reset some fields in preparation for recovering from a crash.
1326   ResetSizeAndRepaintPendingFlags();
1327   current_size_.SetSize(0, 0);
1328   is_hidden_ = false;
1329   is_accelerated_compositing_active_ = false;
1330
1331   // Reset this to ensure the hung renderer mechanism is working properly.
1332   in_flight_event_count_ = 0;
1333
1334   if (view_) {
1335     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1336                                                gfx::GLSurfaceHandle());
1337     view_->RenderProcessGone(status, exit_code);
1338     view_ = NULL;  // The View should be deleted by RenderProcessGone.
1339   }
1340
1341   BackingStoreManager::RemoveBackingStore(this);
1342
1343   synthetic_gesture_controller_.reset();
1344 }
1345
1346 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1347   text_direction_updated_ = true;
1348   text_direction_ = direction;
1349 }
1350
1351 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1352   if (text_direction_updated_)
1353     text_direction_canceled_ = true;
1354 }
1355
1356 void RenderWidgetHostImpl::NotifyTextDirection() {
1357   if (text_direction_updated_) {
1358     if (!text_direction_canceled_)
1359       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1360     text_direction_updated_ = false;
1361     text_direction_canceled_ = false;
1362   }
1363 }
1364
1365 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1366   input_method_active_ = activate;
1367   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1368 }
1369
1370 void RenderWidgetHostImpl::CandidateWindowShown() {
1371   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1372 }
1373
1374 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1375   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1376 }
1377
1378 void RenderWidgetHostImpl::CandidateWindowHidden() {
1379   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1380 }
1381
1382 void RenderWidgetHostImpl::ImeSetComposition(
1383     const base::string16& text,
1384     const std::vector<blink::WebCompositionUnderline>& underlines,
1385     int selection_start,
1386     int selection_end) {
1387   Send(new ViewMsg_ImeSetComposition(
1388             GetRoutingID(), text, underlines, selection_start, selection_end));
1389 }
1390
1391 void RenderWidgetHostImpl::ImeConfirmComposition(
1392     const base::string16& text,
1393     const gfx::Range& replacement_range,
1394     bool keep_selection) {
1395   Send(new ViewMsg_ImeConfirmComposition(
1396         GetRoutingID(), text, replacement_range, keep_selection));
1397 }
1398
1399 void RenderWidgetHostImpl::ImeCancelComposition() {
1400   Send(new ViewMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1401             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1402 }
1403
1404 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1405   return gfx::Rect();
1406 }
1407
1408 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1409                                               bool last_unlocked_by_target) {
1410   // Directly reject to lock the mouse. Subclass can override this method to
1411   // decide whether to allow mouse lock or not.
1412   GotResponseToLockMouseRequest(false);
1413 }
1414
1415 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1416   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1417   if (pending_mouse_lock_request_) {
1418     pending_mouse_lock_request_ = false;
1419     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1420   } else if (IsMouseLocked()) {
1421     view_->UnlockMouse();
1422   }
1423 }
1424
1425 bool RenderWidgetHostImpl::IsMouseLocked() const {
1426   return view_ ? view_->IsMouseLocked() : false;
1427 }
1428
1429 bool RenderWidgetHostImpl::IsFullscreen() const {
1430   return false;
1431 }
1432
1433 void RenderWidgetHostImpl::SetShouldAutoResize(bool enable) {
1434   should_auto_resize_ = enable;
1435 }
1436
1437 void RenderWidgetHostImpl::Destroy() {
1438   NotificationService::current()->Notify(
1439       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1440       Source<RenderWidgetHost>(this),
1441       NotificationService::NoDetails());
1442
1443   // Tell the view to die.
1444   // Note that in the process of the view shutting down, it can call a ton
1445   // of other messages on us.  So if you do any other deinitialization here,
1446   // do it after this call to view_->Destroy().
1447   if (view_)
1448     view_->Destroy();
1449
1450   delete this;
1451 }
1452
1453 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1454   NotificationService::current()->Notify(
1455       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1456       Source<RenderWidgetHost>(this),
1457       NotificationService::NoDetails());
1458   is_unresponsive_ = true;
1459   NotifyRendererUnresponsive();
1460 }
1461
1462 void RenderWidgetHostImpl::RendererIsResponsive() {
1463   if (is_unresponsive_) {
1464     is_unresponsive_ = false;
1465     NotifyRendererResponsive();
1466   }
1467 }
1468
1469 void RenderWidgetHostImpl::OnRenderViewReady() {
1470   SendScreenRects();
1471   WasResized();
1472 }
1473
1474 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1475   // TODO(evanm): This synchronously ends up calling "delete this".
1476   // Is that really what we want in response to this message?  I'm matching
1477   // previous behavior of the code here.
1478   Destroy();
1479 }
1480
1481 void RenderWidgetHostImpl::OnClose() {
1482   Shutdown();
1483 }
1484
1485 void RenderWidgetHostImpl::OnSetTooltipText(
1486     const base::string16& tooltip_text,
1487     WebTextDirection text_direction_hint) {
1488   // First, add directionality marks around tooltip text if necessary.
1489   // A naive solution would be to simply always wrap the text. However, on
1490   // windows, Unicode directional embedding characters can't be displayed on
1491   // systems that lack RTL fonts and are instead displayed as empty squares.
1492   //
1493   // To get around this we only wrap the string when we deem it necessary i.e.
1494   // when the locale direction is different than the tooltip direction hint.
1495   //
1496   // Currently, we use element's directionality as the tooltip direction hint.
1497   // An alternate solution would be to set the overall directionality based on
1498   // trying to detect the directionality from the tooltip text rather than the
1499   // element direction.  One could argue that would be a preferable solution
1500   // but we use the current approach to match Fx & IE's behavior.
1501   base::string16 wrapped_tooltip_text = tooltip_text;
1502   if (!tooltip_text.empty()) {
1503     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1504       // Force the tooltip to have LTR directionality.
1505       wrapped_tooltip_text =
1506           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1507     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1508                !base::i18n::IsRTL()) {
1509       // Force the tooltip to have RTL directionality.
1510       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1511     }
1512   }
1513   if (GetView())
1514     view_->SetTooltipText(wrapped_tooltip_text);
1515 }
1516
1517 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1518   waiting_for_screen_rects_ack_ = false;
1519   if (!view_)
1520     return;
1521
1522   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1523       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1524     return;
1525   }
1526
1527   SendScreenRects();
1528 }
1529
1530 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1531   if (view_) {
1532     view_->SetBounds(pos);
1533     Send(new ViewMsg_Move_ACK(routing_id_));
1534   }
1535 }
1536
1537 #if defined(OS_MACOSX)
1538 void RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwapped(
1539       const ViewHostMsg_CompositorSurfaceBuffersSwapped_Params& params) {
1540   TRACE_EVENT0("renderer_host",
1541                "RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwapped");
1542   if (!ui::LatencyInfo::Verify(params.latency_info,
1543                                "ViewHostMsg_CompositorSurfaceBuffersSwapped"))
1544     return;
1545   if (!view_) {
1546     AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
1547     ack_params.sync_point = 0;
1548     RenderWidgetHostImpl::AcknowledgeBufferPresent(params.route_id,
1549                                                    params.gpu_process_host_id,
1550                                                    ack_params);
1551     return;
1552   }
1553   GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params gpu_params;
1554   gpu_params.surface_id = params.surface_id;
1555   gpu_params.surface_handle = params.surface_handle;
1556   gpu_params.route_id = params.route_id;
1557   gpu_params.size = params.size;
1558   gpu_params.scale_factor = params.scale_factor;
1559   gpu_params.latency_info = params.latency_info;
1560   for (size_t i = 0; i < gpu_params.latency_info.size(); i++)
1561     AddLatencyInfoComponentIds(&gpu_params.latency_info[i]);
1562   view_->AcceleratedSurfaceBuffersSwapped(gpu_params,
1563                                           params.gpu_process_host_id);
1564   view_->DidReceiveRendererFrame();
1565 }
1566 #endif  // OS_MACOSX
1567
1568 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1569     const IPC::Message& message) {
1570   ViewHostMsg_SwapCompositorFrame::Param param;
1571   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1572     return false;
1573   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1574   uint32 output_surface_id = param.a;
1575   param.b.AssignTo(frame.get());
1576
1577   for (size_t i = 0; i < frame->metadata.latency_info.size(); i++)
1578     AddLatencyInfoComponentIds(&frame->metadata.latency_info[i]);
1579
1580   input_router_->OnViewUpdated(
1581       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1582
1583   if (view_) {
1584     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1585     view_->DidReceiveRendererFrame();
1586   } else {
1587     cc::CompositorFrameAck ack;
1588     if (frame->gl_frame_data) {
1589       ack.gl_frame_data = frame->gl_frame_data.Pass();
1590       ack.gl_frame_data->sync_point = 0;
1591     } else if (frame->delegated_frame_data) {
1592       cc::TransferableResource::ReturnResources(
1593           frame->delegated_frame_data->resource_list,
1594           &ack.resources);
1595     } else if (frame->software_frame_data) {
1596       ack.last_software_frame_id = frame->software_frame_data->id;
1597     }
1598     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1599                                process_->GetID(), ack);
1600   }
1601   return true;
1602 }
1603
1604 void RenderWidgetHostImpl::OnOverscrolled(
1605     gfx::Vector2dF accumulated_overscroll,
1606     gfx::Vector2dF current_fling_velocity) {
1607   if (view_)
1608     view_->OnOverscrolled(accumulated_overscroll, current_fling_velocity);
1609 }
1610
1611 void RenderWidgetHostImpl::OnFlingingStopped() {
1612   if (view_)
1613     view_->DidStopFlinging();
1614 }
1615
1616 void RenderWidgetHostImpl::OnUpdateRect(
1617     const ViewHostMsg_UpdateRect_Params& params) {
1618   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1619   TimeTicks paint_start = TimeTicks::Now();
1620
1621   // Update our knowledge of the RenderWidget's size.
1622   current_size_ = params.view_size;
1623   // Update our knowledge of the RenderWidget's scroll offset.
1624   last_scroll_offset_ = params.scroll_offset;
1625
1626   bool is_resize_ack =
1627       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1628
1629   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1630   // that will end up reaching GetBackingStore.
1631   if (is_resize_ack) {
1632     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1633     resize_ack_pending_ = false;
1634   }
1635
1636   bool is_repaint_ack =
1637       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1638   if (is_repaint_ack) {
1639     DCHECK(repaint_ack_pending_);
1640     TRACE_EVENT_ASYNC_END0(
1641         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1642     repaint_ack_pending_ = false;
1643     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1644     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1645   }
1646
1647   DCHECK(!params.view_size.IsEmpty());
1648
1649   bool was_async = false;
1650
1651   // If this is a GPU UpdateRect, params.bitmap is invalid and dib will be NULL.
1652   TransportDIB* dib = process_->GetTransportDIB(params.bitmap);
1653
1654   // If gpu process does painting, scroll_rect and copy_rects are always empty
1655   // and backing store is never used.
1656   if (dib) {
1657     DCHECK(!params.bitmap_rect.IsEmpty());
1658     gfx::Size pixel_size = gfx::ToFlooredSize(
1659         gfx::ScaleSize(params.bitmap_rect.size(), params.scale_factor));
1660     const size_t size = pixel_size.height() * pixel_size.width() * 4;
1661     if (dib->size() < size) {
1662       DLOG(WARNING) << "Transport DIB too small for given rectangle";
1663       RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH1"));
1664       GetProcess()->ReceivedBadMessage();
1665     } else {
1666       // Scroll the backing store.
1667       if (!params.scroll_rect.IsEmpty()) {
1668         ScrollBackingStoreRect(params.scroll_delta,
1669                                params.scroll_rect,
1670                                params.view_size);
1671       }
1672
1673       // Paint the backing store. This will update it with the
1674       // renderer-supplied bits. The view will read out of the backing store
1675       // later to actually draw to the screen.
1676       was_async = PaintBackingStoreRect(
1677           params.bitmap,
1678           params.bitmap_rect,
1679           params.copy_rects,
1680           params.view_size,
1681           params.scale_factor,
1682           base::Bind(&RenderWidgetHostImpl::DidUpdateBackingStore,
1683                      weak_factory_.GetWeakPtr(), params, paint_start));
1684     }
1685   }
1686
1687   if (!was_async) {
1688     DidUpdateBackingStore(params, paint_start);
1689   }
1690
1691   if (should_auto_resize_) {
1692     bool post_callback = new_auto_size_.IsEmpty();
1693     new_auto_size_ = params.view_size;
1694     if (post_callback) {
1695       base::MessageLoop::current()->PostTask(
1696           FROM_HERE,
1697           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1698                      weak_factory_.GetWeakPtr()));
1699     }
1700   }
1701
1702   // Log the time delta for processing a paint message. On platforms that don't
1703   // support asynchronous painting, this is equivalent to
1704   // MPArch.RWH_TotalPaintTime.
1705   TimeDelta delta = TimeTicks::Now() - paint_start;
1706   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1707 }
1708
1709 void RenderWidgetHostImpl::OnUpdateIsDelayed() {
1710   if (in_get_backing_store_)
1711     abort_get_backing_store_ = true;
1712 }
1713
1714 void RenderWidgetHostImpl::DidUpdateBackingStore(
1715     const ViewHostMsg_UpdateRect_Params& params,
1716     const TimeTicks& paint_start) {
1717   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1718   TimeTicks update_start = TimeTicks::Now();
1719
1720   if (params.needs_ack) {
1721     // ACK early so we can prefetch the next PaintRect if there is a next one.
1722     // This must be done AFTER we're done painting with the bitmap supplied by
1723     // the renderer. This ACK is a signal to the renderer that the backing store
1724     // can be re-used, so the bitmap may be invalid after this call.
1725     Send(new ViewMsg_UpdateRect_ACK(routing_id_));
1726   }
1727
1728   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1729   // will not be re-issued, so must move them now, regardless of whether we
1730   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1731   // in the process could dispatch other window messages which could cause the
1732   // view to be destroyed.
1733   if (view_)
1734     view_->MovePluginWindows(params.scroll_offset, params.plugin_window_moves);
1735
1736   NotificationService::current()->Notify(
1737       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1738       Source<RenderWidgetHost>(this),
1739       NotificationService::NoDetails());
1740
1741   // We don't need to update the view if the view is hidden. We must do this
1742   // early return after the ACK is sent, however, or the renderer will not send
1743   // us more data.
1744   if (is_hidden_)
1745     return;
1746
1747   // Now paint the view. Watch out: it might be destroyed already.
1748   if (view_ && !is_accelerated_compositing_active_) {
1749
1750     std::vector<ui::LatencyInfo> latency_info;
1751     for (size_t i = 0; i < params.latency_info.size(); i++) {
1752       ui::LatencyInfo info = params.latency_info[i];
1753       AddLatencyInfoComponentIds(&info);
1754       latency_info.push_back(info);
1755     }
1756
1757     view_being_painted_ = true;
1758     view_->DidUpdateBackingStore(params.scroll_rect, params.scroll_delta,
1759                                  params.copy_rects, latency_info);
1760     view_->DidReceiveRendererFrame();
1761     view_being_painted_ = false;
1762   }
1763
1764   // If we got a resize ack, then perhaps we have another resize to send?
1765   bool is_resize_ack =
1766       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1767   if (is_resize_ack)
1768     WasResized();
1769
1770   // Log the time delta for processing a paint message.
1771   TimeTicks now = TimeTicks::Now();
1772   TimeDelta delta = now - update_start;
1773   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1774
1775   // Measures the time from receiving the MsgUpdateRect IPC to completing the
1776   // DidUpdateBackingStore() method.  On platforms which have asynchronous
1777   // painting, such as Linux, this is the sum of MPArch.RWH_OnMsgUpdateRect,
1778   // MPArch.RWH_DidUpdateBackingStore, and the time spent asynchronously
1779   // waiting for the paint to complete.
1780   //
1781   // On other platforms, this will be equivalent to MPArch.RWH_OnMsgUpdateRect.
1782   delta = now - paint_start;
1783   UMA_HISTOGRAM_TIMES("MPArch.RWH_TotalPaintTime", delta);
1784 }
1785
1786 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1787     const SyntheticGesturePacket& gesture_packet) {
1788   // Only allow untrustworthy gestures if explicitly enabled.
1789   if (!CommandLine::ForCurrentProcess()->HasSwitch(
1790           cc::switches::kEnableGpuBenchmarking)) {
1791     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH7"));
1792     GetProcess()->ReceivedBadMessage();
1793     return;
1794   }
1795
1796   QueueSyntheticGesture(
1797         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1798         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1799                    weak_factory_.GetWeakPtr()));
1800 }
1801
1802 void RenderWidgetHostImpl::OnFocus() {
1803   // Only RenderViewHost can deal with that message.
1804   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH4"));
1805   GetProcess()->ReceivedBadMessage();
1806 }
1807
1808 void RenderWidgetHostImpl::OnBlur() {
1809   // Only RenderViewHost can deal with that message.
1810   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
1811   GetProcess()->ReceivedBadMessage();
1812 }
1813
1814 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1815   if (!view_) {
1816     return;
1817   }
1818   view_->UpdateCursor(cursor);
1819 }
1820
1821 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1822     ui::TextInputType type,
1823     ui::TextInputMode input_mode,
1824     bool can_compose_inline) {
1825   if (view_)
1826     view_->TextInputTypeChanged(type, input_mode, can_compose_inline);
1827 }
1828
1829 #if defined(OS_MACOSX) || defined(OS_WIN) || defined(USE_AURA)
1830 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1831     const gfx::Range& range,
1832     const std::vector<gfx::Rect>& character_bounds) {
1833   if (view_)
1834     view_->ImeCompositionRangeChanged(range, character_bounds);
1835 }
1836 #endif
1837
1838 void RenderWidgetHostImpl::OnImeCancelComposition() {
1839   if (view_)
1840     view_->ImeCancelComposition();
1841 }
1842
1843 void RenderWidgetHostImpl::OnDidActivateAcceleratedCompositing(bool activated) {
1844   TRACE_EVENT1("renderer_host",
1845                "RenderWidgetHostImpl::OnDidActivateAcceleratedCompositing",
1846                "activated", activated);
1847   is_accelerated_compositing_active_ = activated;
1848   if (view_)
1849     view_->OnAcceleratedCompositingStateChange();
1850 }
1851
1852 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1853                                        bool last_unlocked_by_target,
1854                                        bool privileged) {
1855
1856   if (pending_mouse_lock_request_) {
1857     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1858     return;
1859   } else if (IsMouseLocked()) {
1860     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1861     return;
1862   }
1863
1864   pending_mouse_lock_request_ = true;
1865   if (privileged && allow_privileged_mouse_lock_) {
1866     // Directly approve to lock the mouse.
1867     GotResponseToLockMouseRequest(true);
1868   } else {
1869     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1870   }
1871 }
1872
1873 void RenderWidgetHostImpl::OnUnlockMouse() {
1874   RejectMouseLockOrUnlockIfNecessary();
1875 }
1876
1877 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1878     const gfx::Rect& rect,
1879     const gfx::Size& size,
1880     const TransportDIB::Id& id) {
1881   DCHECK(!rect.IsEmpty());
1882   DCHECK(!size.IsEmpty());
1883
1884   TransportDIB* dib = process_->GetTransportDIB(id);
1885   if (!dib) {
1886     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH6"));
1887     GetProcess()->ReceivedBadMessage();
1888     return;
1889   }
1890
1891   DCHECK(dib->memory());
1892   DCHECK(dib->size() == SkBitmap::ComputeSize(SkBitmap::kARGB_8888_Config,
1893                                               size.width(), size.height()));
1894
1895   SkBitmap zoomed_bitmap;
1896   zoomed_bitmap.setConfig(SkBitmap::kARGB_8888_Config,
1897       size.width(), size.height());
1898   zoomed_bitmap.setPixels(dib->memory());
1899
1900 #if defined(OS_ANDROID)
1901   if (view_)
1902     view_->ShowDisambiguationPopup(rect, zoomed_bitmap);
1903 #else
1904   NOTIMPLEMENTED();
1905 #endif
1906
1907   zoomed_bitmap.setPixels(0);
1908   Send(new ViewMsg_ReleaseDisambiguationPopupDIB(GetRoutingID(),
1909                                                  dib->handle()));
1910 }
1911
1912 #if defined(OS_WIN)
1913 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1914     gfx::NativeViewId dummy_activation_window) {
1915   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1916
1917   // This may happen as a result of a race condition when the plugin is going
1918   // away.
1919   wchar_t window_title[MAX_PATH + 1] = {0};
1920   if (!IsWindow(hwnd) ||
1921       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1922       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1923     return;
1924   }
1925
1926 #if defined(USE_AURA)
1927   SetParent(hwnd,
1928             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1929 #else
1930   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1931 #endif
1932   dummy_windows_for_activation_.push_back(hwnd);
1933 }
1934
1935 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1936     gfx::NativeViewId dummy_activation_window) {
1937   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1938   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1939   for (; i != dummy_windows_for_activation_.end(); ++i) {
1940     if ((*i) == hwnd) {
1941       dummy_windows_for_activation_.erase(i);
1942       return;
1943     }
1944   }
1945   NOTREACHED() << "Unknown dummy window";
1946 }
1947 #endif
1948
1949 bool RenderWidgetHostImpl::PaintBackingStoreRect(
1950     TransportDIB::Id bitmap,
1951     const gfx::Rect& bitmap_rect,
1952     const std::vector<gfx::Rect>& copy_rects,
1953     const gfx::Size& view_size,
1954     float scale_factor,
1955     const base::Closure& completion_callback) {
1956   // The view may be destroyed already.
1957   if (!view_)
1958     return false;
1959
1960   if (is_hidden_) {
1961     // Don't bother updating the backing store when we're hidden. Just mark it
1962     // as being totally invalid. This will cause a complete repaint when the
1963     // view is restored.
1964     needs_repainting_on_restore_ = true;
1965     return false;
1966   }
1967
1968   bool needs_full_paint = false;
1969   bool scheduled_completion_callback = false;
1970   BackingStoreManager::PrepareBackingStore(this, view_size, bitmap, bitmap_rect,
1971                                            copy_rects, scale_factor,
1972                                            completion_callback,
1973                                            &needs_full_paint,
1974                                            &scheduled_completion_callback);
1975   if (needs_full_paint) {
1976     repaint_start_time_ = TimeTicks::Now();
1977     DCHECK(!repaint_ack_pending_);
1978     repaint_ack_pending_ = true;
1979     TRACE_EVENT_ASYNC_BEGIN0(
1980         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1981     Send(new ViewMsg_Repaint(routing_id_, view_size));
1982   }
1983
1984   return scheduled_completion_callback;
1985 }
1986
1987 void RenderWidgetHostImpl::ScrollBackingStoreRect(const gfx::Vector2d& delta,
1988                                                   const gfx::Rect& clip_rect,
1989                                                   const gfx::Size& view_size) {
1990   if (is_hidden_) {
1991     // Don't bother updating the backing store when we're hidden. Just mark it
1992     // as being totally invalid. This will cause a complete repaint when the
1993     // view is restored.
1994     needs_repainting_on_restore_ = true;
1995     return;
1996   }
1997
1998   // TODO(darin): do we need to do something else if our backing store is not
1999   // the same size as the advertised view?  maybe we just assume there is a
2000   // full paint on its way?
2001   BackingStore* backing_store = BackingStoreManager::Lookup(this);
2002   if (!backing_store || (backing_store->size() != view_size))
2003     return;
2004   backing_store->ScrollBackingStore(delta, clip_rect, view_size);
2005 }
2006
2007 void RenderWidgetHostImpl::Replace(const base::string16& word) {
2008   Send(new InputMsg_Replace(routing_id_, word));
2009 }
2010
2011 void RenderWidgetHostImpl::ReplaceMisspelling(const base::string16& word) {
2012   Send(new InputMsg_ReplaceMisspelling(routing_id_, word));
2013 }
2014
2015 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
2016   ignore_input_events_ = ignore_input_events;
2017 }
2018
2019 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
2020     const NativeWebKeyboardEvent& event) {
2021   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
2022     return false;
2023
2024   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
2025     size_t original_size = key_press_event_callbacks_.size();
2026     if (key_press_event_callbacks_[i].Run(event))
2027       return true;
2028
2029     // Check whether the callback that just ran removed itself, in which case
2030     // the iterator needs to be decremented to properly account for the removal.
2031     size_t current_size = key_press_event_callbacks_.size();
2032     if (current_size != original_size) {
2033       DCHECK_EQ(original_size - 1, current_size);
2034       --i;
2035     }
2036   }
2037
2038   return false;
2039 }
2040
2041 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
2042     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
2043   // Don't ignore touch cancel events, since they may be sent while input
2044   // events are being ignored in order to keep the renderer from getting
2045   // confused about how many touches are active.
2046   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
2047     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
2048
2049   if (!process_->HasConnection())
2050     return INPUT_EVENT_ACK_STATE_UNKNOWN;
2051
2052   if (event.type == WebInputEvent::MouseDown)
2053     OnUserGesture();
2054
2055   return view_ ? view_->FilterInputEvent(event)
2056                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
2057 }
2058
2059 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
2060   StartHangMonitorTimeout(
2061       TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
2062   increment_in_flight_event_count();
2063 }
2064
2065 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
2066   DCHECK(in_flight_event_count_ >= 0);
2067   // Cancel pending hung renderer checks since the renderer is responsive.
2068   if (decrement_in_flight_event_count() <= 0)
2069     StopHangMonitorTimeout();
2070 }
2071
2072 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
2073   has_touch_handler_ = has_handlers;
2074 }
2075
2076 OverscrollController* RenderWidgetHostImpl::GetOverscrollController() const {
2077   return overscroll_controller_.get();
2078 }
2079
2080 void RenderWidgetHostImpl::DidFlush() {
2081   if (view_)
2082     view_->OnDidFlushInput();
2083 }
2084
2085 void RenderWidgetHostImpl::OnKeyboardEventAck(
2086       const NativeWebKeyboardEvent& event,
2087       InputEventAckState ack_result) {
2088 #if defined(OS_MACOSX)
2089   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
2090     return;
2091 #endif
2092
2093   // We only send unprocessed key event upwards if we are not hidden,
2094   // because the user has moved away from us and no longer expect any effect
2095   // of this key event.
2096   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
2097   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
2098     delegate_->HandleKeyboardEvent(event);
2099
2100     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
2101     // (i.e.  in the case of Ctrl+W, where the call to
2102     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
2103   }
2104 }
2105
2106 void RenderWidgetHostImpl::OnWheelEventAck(
2107     const MouseWheelEventWithLatencyInfo& wheel_event,
2108     InputEventAckState ack_result) {
2109   if (!wheel_event.latency.FindLatency(
2110           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
2111     // MouseWheelEvent latency ends when it is acked but does not cause any
2112     // rendering scheduled.
2113     ui::LatencyInfo latency = wheel_event.latency;
2114     latency.AddLatencyNumber(
2115         ui::INPUT_EVENT_LATENCY_TERMINATED_MOUSE_COMPONENT, 0, 0);
2116   }
2117
2118   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
2119   if (!processed && !is_hidden() && view_) {
2120     if (!delegate_->HandleWheelEvent(wheel_event.event))
2121       view_->UnhandledWheelEvent(wheel_event.event);
2122   }
2123 }
2124
2125 void RenderWidgetHostImpl::OnGestureEventAck(
2126     const GestureEventWithLatencyInfo& event,
2127     InputEventAckState ack_result) {
2128   if (!event.latency.FindLatency(
2129           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
2130     // GestureEvent latency ends when it is acked but does not cause any
2131     // rendering scheduled.
2132     ui::LatencyInfo latency = event.latency;
2133     latency.AddLatencyNumber(
2134         ui::INPUT_EVENT_LATENCY_TERMINATED_GESTURE_COMPONENT, 0 ,0);
2135   }
2136
2137   if (view_)
2138     view_->GestureEventAck(event.event, ack_result);
2139 }
2140
2141 void RenderWidgetHostImpl::OnTouchEventAck(
2142     const TouchEventWithLatencyInfo& event,
2143     InputEventAckState ack_result) {
2144   TouchEventWithLatencyInfo touch_event = event;
2145   touch_event.latency.AddLatencyNumber(
2146       ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT, 0, 0);
2147   // TouchEvent latency ends at ack if it didn't cause any rendering.
2148   if (!touch_event.latency.FindLatency(
2149           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
2150     touch_event.latency.AddLatencyNumber(
2151         ui::INPUT_EVENT_LATENCY_TERMINATED_TOUCH_COMPONENT, 0, 0);
2152   }
2153   ComputeTouchLatency(touch_event.latency);
2154   if (view_)
2155     view_->ProcessAckedTouchEvent(touch_event, ack_result);
2156 }
2157
2158 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
2159   if (type == BAD_ACK_MESSAGE) {
2160     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH2"));
2161     process_->ReceivedBadMessage();
2162   } else if (type == UNEXPECTED_EVENT_TYPE) {
2163     suppress_next_char_events_ = false;
2164   }
2165 }
2166
2167 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
2168     SyntheticGesture::Result result) {
2169   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
2170 }
2171
2172 const gfx::Vector2d& RenderWidgetHostImpl::GetLastScrollOffset() const {
2173   return last_scroll_offset_;
2174 }
2175
2176 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
2177   return ignore_input_events_ || process_->IgnoreInputEvents();
2178 }
2179
2180 bool RenderWidgetHostImpl::ShouldForwardTouchEvent() const {
2181   return input_router_->ShouldForwardTouchEvent();
2182 }
2183
2184 void RenderWidgetHostImpl::StartUserGesture() {
2185   OnUserGesture();
2186 }
2187
2188 void RenderWidgetHostImpl::Stop() {
2189   Send(new ViewMsg_Stop(GetRoutingID()));
2190 }
2191
2192 void RenderWidgetHostImpl::SetBackground(const SkBitmap& background) {
2193   Send(new ViewMsg_SetBackground(GetRoutingID(), background));
2194 }
2195
2196 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
2197     const std::vector<EditCommand>& commands) {
2198   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
2199 }
2200
2201 void RenderWidgetHostImpl::AddAccessibilityMode(AccessibilityMode mode) {
2202   SetAccessibilityMode(
2203       content::AddAccessibilityModeTo(accessibility_mode_, mode));
2204 }
2205
2206 void RenderWidgetHostImpl::RemoveAccessibilityMode(AccessibilityMode mode) {
2207   SetAccessibilityMode(
2208       content::RemoveAccessibilityModeFrom(accessibility_mode_, mode));
2209 }
2210
2211 void RenderWidgetHostImpl::ResetAccessibilityMode() {
2212   SetAccessibilityMode(
2213       BrowserAccessibilityStateImpl::GetInstance()->accessibility_mode());
2214 }
2215
2216 void RenderWidgetHostImpl::SetAccessibilityMode(AccessibilityMode mode) {
2217   accessibility_mode_ = mode;
2218   Send(new ViewMsg_SetAccessibilityMode(GetRoutingID(), mode));
2219 }
2220
2221 void RenderWidgetHostImpl::AccessibilityDoDefaultAction(int object_id) {
2222   Send(new AccessibilityMsg_DoDefaultAction(GetRoutingID(), object_id));
2223 }
2224
2225 void RenderWidgetHostImpl::AccessibilitySetFocus(int object_id) {
2226   Send(new AccessibilityMsg_SetFocus(GetRoutingID(), object_id));
2227 }
2228
2229 void RenderWidgetHostImpl::AccessibilityScrollToMakeVisible(
2230     int acc_obj_id, gfx::Rect subfocus) {
2231   Send(new AccessibilityMsg_ScrollToMakeVisible(
2232       GetRoutingID(), acc_obj_id, subfocus));
2233 }
2234
2235 void RenderWidgetHostImpl::AccessibilityScrollToPoint(
2236     int acc_obj_id, gfx::Point point) {
2237   Send(new AccessibilityMsg_ScrollToPoint(
2238       GetRoutingID(), acc_obj_id, point));
2239 }
2240
2241 void RenderWidgetHostImpl::AccessibilitySetTextSelection(
2242     int object_id, int start_offset, int end_offset) {
2243   Send(new AccessibilityMsg_SetTextSelection(
2244       GetRoutingID(), object_id, start_offset, end_offset));
2245 }
2246
2247 void RenderWidgetHostImpl::FatalAccessibilityTreeError() {
2248   Send(new AccessibilityMsg_FatalError(GetRoutingID()));
2249 }
2250
2251 #if defined(OS_WIN)
2252 void RenderWidgetHostImpl::SetParentNativeViewAccessible(
2253     gfx::NativeViewAccessible accessible_parent) {
2254   if (view_)
2255     view_->SetParentNativeViewAccessible(accessible_parent);
2256 }
2257
2258 gfx::NativeViewAccessible
2259 RenderWidgetHostImpl::GetParentNativeViewAccessible() const {
2260   return delegate_->GetParentNativeViewAccessible();
2261 }
2262 #endif
2263
2264 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
2265                                               const std::string& value) {
2266   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
2267 }
2268
2269 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
2270     const gfx::Rect& rect) {
2271   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
2272 }
2273
2274 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
2275   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
2276 }
2277
2278 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
2279   if (!allowed) {
2280     RejectMouseLockOrUnlockIfNecessary();
2281     return false;
2282   } else {
2283     if (!pending_mouse_lock_request_) {
2284       // This is possible, e.g., the plugin sends us an unlock request before
2285       // the user allows to lock to mouse.
2286       return false;
2287     }
2288
2289     pending_mouse_lock_request_ = false;
2290     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
2291       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
2292       return false;
2293     } else {
2294       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
2295       return true;
2296     }
2297   }
2298 }
2299
2300 // static
2301 void RenderWidgetHostImpl::AcknowledgeBufferPresent(
2302     int32 route_id, int gpu_host_id,
2303     const AcceleratedSurfaceMsg_BufferPresented_Params& params) {
2304   GpuProcessHostUIShim* ui_shim = GpuProcessHostUIShim::FromID(gpu_host_id);
2305   if (ui_shim) {
2306     ui_shim->Send(new AcceleratedSurfaceMsg_BufferPresented(route_id,
2307                                                             params));
2308   }
2309 }
2310
2311 // static
2312 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
2313     int32 route_id,
2314     uint32 output_surface_id,
2315     int renderer_host_id,
2316     const cc::CompositorFrameAck& ack) {
2317   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2318   if (!host)
2319     return;
2320   host->Send(new ViewMsg_SwapCompositorFrameAck(
2321       route_id, output_surface_id, ack));
2322 }
2323
2324 // static
2325 void RenderWidgetHostImpl::SendReclaimCompositorResources(
2326     int32 route_id,
2327     uint32 output_surface_id,
2328     int renderer_host_id,
2329     const cc::CompositorFrameAck& ack) {
2330   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2331   if (!host)
2332     return;
2333   host->Send(
2334       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
2335 }
2336
2337 void RenderWidgetHostImpl::AcknowledgeSwapBuffersToRenderer() {
2338   if (!is_threaded_compositing_enabled_)
2339     Send(new ViewMsg_SwapBuffers_ACK(routing_id_));
2340 }
2341
2342 void RenderWidgetHostImpl::DelayedAutoResized() {
2343   gfx::Size new_size = new_auto_size_;
2344   // Clear the new_auto_size_ since the empty value is used as a flag to
2345   // indicate that no callback is in progress (i.e. without this line
2346   // DelayedAutoResized will not get called again).
2347   new_auto_size_.SetSize(0, 0);
2348   if (!should_auto_resize_)
2349     return;
2350
2351   OnRenderAutoResized(new_size);
2352 }
2353
2354 void RenderWidgetHostImpl::DetachDelegate() {
2355   delegate_ = NULL;
2356 }
2357
2358 void RenderWidgetHostImpl::ComputeTouchLatency(
2359     const ui::LatencyInfo& latency_info) {
2360   ui::LatencyInfo::LatencyComponent ui_component;
2361   ui::LatencyInfo::LatencyComponent rwh_component;
2362   ui::LatencyInfo::LatencyComponent acked_component;
2363
2364   if (!latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_UI_COMPONENT,
2365                                 0,
2366                                 &ui_component) ||
2367       !latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
2368                                 GetLatencyComponentId(),
2369                                 &rwh_component))
2370     return;
2371
2372   DCHECK(ui_component.event_count == 1);
2373   DCHECK(rwh_component.event_count == 1);
2374
2375   base::TimeDelta ui_delta =
2376       rwh_component.event_time - ui_component.event_time;
2377   UMA_HISTOGRAM_CUSTOM_COUNTS(
2378       "Event.Latency.Browser.TouchUI",
2379       ui_delta.InMicroseconds(),
2380       1,
2381       20000,
2382       100);
2383
2384   if (latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT,
2385                                0,
2386                                &acked_component)) {
2387     DCHECK(acked_component.event_count == 1);
2388     base::TimeDelta acked_delta =
2389         acked_component.event_time - rwh_component.event_time;
2390     UMA_HISTOGRAM_CUSTOM_COUNTS(
2391         "Event.Latency.Browser.TouchAcked",
2392         acked_delta.InMicroseconds(),
2393         1,
2394         1000000,
2395         100);
2396   }
2397 }
2398
2399 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
2400   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2401   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2402                                GetLatencyComponentId(),
2403                                &window_snapshot_component)) {
2404     WindowSnapshotReachedScreen(
2405         static_cast<int>(window_snapshot_component.sequence_number));
2406   }
2407
2408   ui::LatencyInfo::LatencyComponent rwh_component;
2409   ui::LatencyInfo::LatencyComponent swap_component;
2410   if (!latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
2411                                 GetLatencyComponentId(),
2412                                 &rwh_component) ||
2413       !latency_info.FindLatency(
2414           ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT,
2415           0, &swap_component)) {
2416     return;
2417   }
2418
2419   ui::LatencyInfo::LatencyComponent original_component;
2420   if (latency_info.FindLatency(
2421           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
2422           GetLatencyComponentId(),
2423           &original_component)) {
2424     // This UMA metric tracks the time from when the original touch event is
2425     // created (averaged if there are multiple) to when the scroll gesture
2426     // results in final frame swap.
2427     base::TimeDelta delta =
2428         swap_component.event_time - original_component.event_time;
2429     for (size_t i = 0; i < original_component.event_count; i++) {
2430       UMA_HISTOGRAM_CUSTOM_COUNTS(
2431           "Event.Latency.TouchToScrollUpdateSwap",
2432           delta.InMicroseconds(),
2433           1,
2434           1000000,
2435           100);
2436     }
2437   }
2438 }
2439
2440 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2441   view_->DidReceiveRendererFrame();
2442 }
2443
2444 void RenderWidgetHostImpl::WindowSnapshotAsyncCallback(
2445     int routing_id,
2446     int snapshot_id,
2447     gfx::Size snapshot_size,
2448     scoped_refptr<base::RefCountedBytes> png_data) {
2449   if (!png_data) {
2450     std::vector<unsigned char> png_vector;
2451     Send(new ViewMsg_WindowSnapshotCompleted(
2452         routing_id, snapshot_id, gfx::Size(), png_vector));
2453     return;
2454   }
2455
2456   Send(new ViewMsg_WindowSnapshotCompleted(
2457       routing_id, snapshot_id, snapshot_size, png_data->data()));
2458 }
2459
2460 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2461   DCHECK(base::MessageLoopForUI::IsCurrent());
2462
2463   std::vector<unsigned char> png;
2464
2465   // This feature is behind the kEnableGpuBenchmarking command line switch
2466   // because it poses security concerns and should only be used for testing.
2467   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
2468   if (!command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking)) {
2469     Send(new ViewMsg_WindowSnapshotCompleted(
2470         GetRoutingID(), snapshot_id, gfx::Size(), png));
2471     return;
2472   }
2473
2474   gfx::Rect view_bounds = GetView()->GetViewBounds();
2475   gfx::Rect snapshot_bounds(view_bounds.size());
2476   gfx::Size snapshot_size = snapshot_bounds.size();
2477
2478   if (ui::GrabViewSnapshot(
2479           GetView()->GetNativeView(), &png, snapshot_bounds)) {
2480     Send(new ViewMsg_WindowSnapshotCompleted(
2481         GetRoutingID(), snapshot_id, snapshot_size, png));
2482     return;
2483   }
2484
2485   ui::GrabViewSnapshotAsync(
2486       GetView()->GetNativeView(),
2487       snapshot_bounds,
2488       base::ThreadTaskRunnerHandle::Get(),
2489       base::Bind(&RenderWidgetHostImpl::WindowSnapshotAsyncCallback,
2490                  weak_factory_.GetWeakPtr(),
2491                  GetRoutingID(),
2492                  snapshot_id,
2493                  snapshot_size));
2494 }
2495
2496 // static
2497 void RenderWidgetHostImpl::CompositorFrameDrawn(
2498     const std::vector<ui::LatencyInfo>& latency_info) {
2499   for (size_t i = 0; i < latency_info.size(); i++) {
2500     std::set<RenderWidgetHostImpl*> rwhi_set;
2501     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2502              latency_info[i].latency_components.begin();
2503          b != latency_info[i].latency_components.end();
2504          ++b) {
2505       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2506           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT) {
2507         // Matches with GetLatencyComponentId
2508         int routing_id = b->first.second & 0xffffffff;
2509         int process_id = (b->first.second >> 32) & 0xffffffff;
2510         RenderWidgetHost* rwh =
2511             RenderWidgetHost::FromID(process_id, routing_id);
2512         if (!rwh) {
2513           continue;
2514         }
2515         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2516         if (rwhi_set.insert(rwhi).second)
2517           rwhi->FrameSwapped(latency_info[i]);
2518       }
2519     }
2520   }
2521 }
2522
2523 void RenderWidgetHostImpl::AddLatencyInfoComponentIds(
2524     ui::LatencyInfo* latency_info) {
2525   ui::LatencyInfo::LatencyMap new_components;
2526   ui::LatencyInfo::LatencyMap::iterator lc =
2527       latency_info->latency_components.begin();
2528   while (lc != latency_info->latency_components.end()) {
2529     ui::LatencyComponentType component_type = lc->first.first;
2530     if (component_type == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT) {
2531       // Generate a new component entry with the correct component ID
2532       ui::LatencyInfo::LatencyMap::key_type key =
2533           std::make_pair(component_type, GetLatencyComponentId());
2534       new_components[key] = lc->second;
2535
2536       // Remove the old entry
2537       latency_info->latency_components.erase(lc++);
2538     } else {
2539       ++lc;
2540     }
2541   }
2542
2543   // Add newly generated components into the latency info
2544   for (lc = new_components.begin(); lc != new_components.end(); ++lc) {
2545     latency_info->latency_components[lc->first] = lc->second;
2546   }
2547 }
2548
2549 SkBitmap::Config RenderWidgetHostImpl::PreferredReadbackFormat() {
2550   if (view_)
2551     return view_->PreferredReadbackFormat();
2552   return SkBitmap::kARGB_8888_Config;
2553 }
2554
2555 }  // namespace content