content/browser/renderer_host/render_widget_host_impl.cc

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