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/message_loop/message_loop.h"
  18 #include "base/metrics/field_trial.h"
  19 #include "base/metrics/histogram.h"
  20 #include "base/strings/string_number_conversions.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/thread_task_runner_handle.h"
  23 #include "base/trace_event/trace_event.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/bad_message.h"
  30 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  31 #include "content/browser/gpu/compositor_util.h"
  32 #include "content/browser/gpu/gpu_process_host.h"
  33 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  34 #include "content/browser/gpu/gpu_surface_tracker.h"
  35 #include "content/browser/renderer_host/dip_util.h"
  36 #include "content/browser/renderer_host/frame_metadata_util.h"
  37 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  38 #include "content/browser/renderer_host/input/input_router_impl.h"
  39 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  40 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  41 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  42 #include "content/browser/renderer_host/input/timeout_monitor.h"
  43 #include "content/browser/renderer_host/input/touch_emulator.h"
  44 #include "content/browser/renderer_host/render_process_host_impl.h"
  45 #include "content/browser/renderer_host/render_view_host_impl.h"
  46 #include "content/browser/renderer_host/render_widget_helper.h"
  47 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  48 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  49 #include "content/browser/renderer_host/render_widget_resize_helper.h"
  50 #include "content/common/content_constants_internal.h"
  51 #include "content/common/cursors/webcursor.h"
  52 #include "content/common/frame_messages.h"
  53 #include "content/common/gpu/gpu_messages.h"
  54 #include "content/common/host_shared_bitmap_manager.h"
  55 #include "content/common/input_messages.h"
  56 #include "content/common/view_messages.h"
  57 #include "content/public/browser/native_web_keyboard_event.h"
  58 #include "content/public/browser/notification_service.h"
  59 #include "content/public/browser/notification_types.h"
  60 #include "content/public/browser/render_widget_host_iterator.h"
  61 #include "content/public/common/content_constants.h"
  62 #include "content/public/common/content_switches.h"
  63 #include "content/public/common/result_codes.h"
  64 #include "content/public/common/web_preferences.h"
  65 #include "gpu/GLES2/gl2extchromium.h"
  66 #include "gpu/command_buffer/service/gpu_switches.h"
  67 #include "skia/ext/image_operations.h"
  68 #include "skia/ext/platform_canvas.h"
  69 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  70 #include "ui/events/event.h"
  71 #include "ui/events/keycodes/keyboard_codes.h"
  72 #include "ui/gfx/geometry/size_conversions.h"
  73 #include "ui/gfx/geometry/vector2d_conversions.h"
  74 #include "ui/gfx/skbitmap_operations.h"
  75 #include "ui/snapshot/snapshot.h"
  76
  77 #if defined(OS_WIN)
  78 #include "content/common/plugin_constants_win.h"
  79 #endif
  80
  81 using base::Time;
  82 using base::TimeDelta;
  83 using base::TimeTicks;
  84 using blink::WebGestureEvent;
  85 using blink::WebInputEvent;
  86 using blink::WebKeyboardEvent;
  87 using blink::WebMouseEvent;
  88 using blink::WebMouseWheelEvent;
  89 using blink::WebTextDirection;
  90
  91 namespace content {
  92 namespace {
  93
  94 bool g_check_for_pending_resize_ack = true;
  95
  96 typedef std::pair<int32, int32> RenderWidgetHostID;
  97 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
  98     RoutingIDWidgetMap;
  99 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 100     LAZY_INSTANCE_INITIALIZER;
 101
 102 int GetInputRouterViewFlagsFromCompositorFrameMetadata(
 103     const cc::CompositorFrameMetadata metadata) {
 104   int view_flags = InputRouter::VIEW_FLAGS_NONE;
 105
 106   if (metadata.min_page_scale_factor == metadata.max_page_scale_factor)
 107     view_flags |= InputRouter::FIXED_PAGE_SCALE;
 108
 109   const float window_width_dip = std::ceil(
 110       metadata.page_scale_factor * metadata.scrollable_viewport_size.width());
 111   const float content_width_css = metadata.root_layer_size.width();
 112   if (content_width_css <= window_width_dip)
 113     view_flags |= InputRouter::MOBILE_VIEWPORT;
 114
 115   return view_flags;
 116 }
 117
 118 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 119 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 120 // iteration (or NULL if there isn't any left).
 121 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 122  public:
 123   RenderWidgetHostIteratorImpl()
 124       : current_index_(0) {
 125   }
 126
 127   ~RenderWidgetHostIteratorImpl() override {}
 128
 129   void Add(RenderWidgetHost* host) {
 130     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 131                                         host->GetRoutingID()));
 132   }
 133
 134   // RenderWidgetHostIterator:
 135   RenderWidgetHost* GetNextHost() override {
 136     RenderWidgetHost* host = NULL;
 137     while (current_index_ < hosts_.size() && !host) {
 138       RenderWidgetHostID id = hosts_[current_index_];
 139       host = RenderWidgetHost::FromID(id.first, id.second);
 140       ++current_index_;
 141     }
 142     return host;
 143   }
 144
 145  private:
 146   std::vector<RenderWidgetHostID> hosts_;
 147   size_t current_index_;
 148
 149   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 150 };
 151
 152 }  // namespace
 153
 154 ///////////////////////////////////////////////////////////////////////////////
 155 // RenderWidgetHostImpl
 156
 157 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 158                                            RenderProcessHost* process,
 159                                            int routing_id,
 160                                            bool hidden)
 161     : view_(NULL),
 162       renderer_initialized_(false),
 163       hung_renderer_delay_(
 164           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs)),
 165       delegate_(delegate),
 166       process_(process),
 167       routing_id_(routing_id),
 168       surface_id_(0),
 169       is_loading_(false),
 170       is_hidden_(hidden),
 171       repaint_ack_pending_(false),
 172       resize_ack_pending_(false),
 173       screen_info_out_of_date_(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   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 326       surface_id_, GetCompositingSurface());
 327
 328   synthetic_gesture_controller_.reset();
 329 }
 330
 331 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 332   return process_;
 333 }
 334
 335 int RenderWidgetHostImpl::GetRoutingID() const {
 336   return routing_id_;
 337 }
 338
 339 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 340   return view_;
 341 }
 342
 343 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 344   return this;
 345 }
 346
 347 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 348   if (view_)
 349     return view_->GetNativeViewId();
 350   return 0;
 351 }
 352
 353 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 354   if (view_)
 355     return view_->GetCompositingSurface();
 356   return gfx::GLSurfaceHandle();
 357 }
 358
 359 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 360   resize_ack_pending_ = false;
 361   if (repaint_ack_pending_) {
 362     TRACE_EVENT_ASYNC_END0(
 363         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 364   }
 365   repaint_ack_pending_ = false;
 366   if (old_resize_params_)
 367     old_resize_params_->new_size = gfx::Size();
 368 }
 369
 370 void RenderWidgetHostImpl::SendScreenRects() {
 371   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 372     return;
 373
 374   if (is_hidden_) {
 375     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 376     // happens on Win & Mac, and when the view is shown it'll call this again.
 377     return;
 378   }
 379
 380   if (!view_)
 381     return;
 382
 383   last_view_screen_rect_ = view_->GetViewBounds();
 384   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 385   Send(new ViewMsg_UpdateScreenRects(
 386       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 387   if (delegate_)
 388     delegate_->DidSendScreenRects(this);
 389   waiting_for_screen_rects_ack_ = true;
 390 }
 391
 392 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 393   suppress_next_char_events_ = true;
 394 }
 395
 396 void RenderWidgetHostImpl::FlushInput() {
 397   input_router_->RequestNotificationWhenFlushed();
 398   if (synthetic_gesture_controller_)
 399     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 400 }
 401
 402 void RenderWidgetHostImpl::SetNeedsFlush() {
 403   if (view_)
 404     view_->OnSetNeedsFlushInput();
 405 }
 406
 407 void RenderWidgetHostImpl::Init() {
 408   DCHECK(process_->HasConnection());
 409
 410   renderer_initialized_ = true;
 411
 412   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 413       surface_id_, GetCompositingSurface());
 414
 415   // Send the ack along with the information on placement.
 416   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 417   GetProcess()->ResumeRequestsForView(routing_id_);
 418
 419   WasResized();
 420 }
 421
 422 void RenderWidgetHostImpl::InitForFrame() {
 423   DCHECK(process_->HasConnection());
 424   renderer_initialized_ = true;
 425 }
 426
 427 void RenderWidgetHostImpl::Shutdown() {
 428   RejectMouseLockOrUnlockIfNecessary();
 429
 430   if (process_->HasConnection()) {
 431     // Tell the renderer object to close.
 432     bool rv = Send(new ViewMsg_Close(routing_id_));
 433     DCHECK(rv);
 434   }
 435
 436   Destroy();
 437 }
 438
 439 bool RenderWidgetHostImpl::IsLoading() const {
 440   return is_loading_;
 441 }
 442
 443 bool RenderWidgetHostImpl::IsRenderView() const {
 444   return false;
 445 }
 446
 447 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 448   bool handled = true;
 449   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 450     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 451     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 452                         OnQueueSyntheticGesture)
 453     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 454                         OnImeCancelComposition)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 456     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 458                         OnUpdateScreenRectsAck)
 459     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 460     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 461     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 462                                 OnSwapCompositorFrame(msg))
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 466     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 467     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
 468                         OnTextInputTypeChanged)
 469     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 471     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 472                         OnShowDisambiguationPopup)
 473     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 474     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 475                         OnSelectionBoundsChanged)
 476 #if defined(OS_WIN)
 477     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 478                         OnWindowlessPluginDummyWindowCreated)
 479     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 480                         OnWindowlessPluginDummyWindowDestroyed)
 481 #endif
 482     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 483                         OnImeCompositionRangeChanged)
 484     IPC_MESSAGE_UNHANDLED(handled = false)
 485   IPC_END_MESSAGE_MAP()
 486
 487   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 488     return true;
 489
 490   if (!handled && view_ && view_->OnMessageReceived(msg))
 491     return true;
 492
 493   return handled;
 494 }
 495
 496 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 497   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 498     return input_router_->SendInput(make_scoped_ptr(msg));
 499
 500   return process_->Send(msg);
 501 }
 502
 503 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 504   is_loading_ = is_loading;
 505   if (!view_)
 506     return;
 507   view_->SetIsLoading(is_loading);
 508 }
 509
 510 void RenderWidgetHostImpl::WasHidden() {
 511   if (is_hidden_)
 512     return;
 513
 514   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
 515   is_hidden_ = true;
 516
 517   // Don't bother reporting hung state when we aren't active.
 518   StopHangMonitorTimeout();
 519
 520   // If we have a renderer, then inform it that we are being hidden so it can
 521   // reduce its resource utilization.
 522   Send(new ViewMsg_WasHidden(routing_id_));
 523
 524   // Tell the RenderProcessHost we were hidden.
 525   process_->WidgetHidden();
 526
 527   bool is_visible = false;
 528   NotificationService::current()->Notify(
 529       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 530       Source<RenderWidgetHost>(this),
 531       Details<bool>(&is_visible));
 532 }
 533
 534 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 535   if (!is_hidden_)
 536     return;
 537
 538   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasShown");
 539   is_hidden_ = false;
 540
 541   SendScreenRects();
 542
 543   // When hidden, timeout monitoring for input events is disabled. Restore it
 544   // now to ensure consistent hang detection.
 545   if (in_flight_event_count_)
 546     RestartHangMonitorTimeout();
 547
 548   // Always repaint on restore.
 549   bool needs_repainting = true;
 550   needs_repainting_on_restore_ = false;
 551   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 552
 553   process_->WidgetRestored();
 554
 555   bool is_visible = true;
 556   NotificationService::current()->Notify(
 557       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 558       Source<RenderWidgetHost>(this),
 559       Details<bool>(&is_visible));
 560
 561   // It's possible for our size to be out of sync with the renderer. The
 562   // following is one case that leads to this:
 563   // 1. WasResized -> Send ViewMsg_Resize to render
 564   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 565   // 3. WasHidden
 566   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 567   //    is hidden. Now renderer/browser out of sync with what they think size
 568   //    is.
 569   // By invoking WasResized the renderer is updated as necessary. WasResized
 570   // does nothing if the sizes are already in sync.
 571   //
 572   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 573   // could handle both the restore and resize at once. This isn't that big a
 574   // deal as RenderWidget::WasShown delays updating, so that the resize from
 575   // WasResized is usually processed before the renderer is painted.
 576   WasResized();
 577 }
 578
 579 bool RenderWidgetHostImpl::GetResizeParams(
 580     ViewMsg_Resize_Params* resize_params) {
 581   *resize_params = ViewMsg_Resize_Params();
 582
 583   if (!screen_info_) {
 584     screen_info_.reset(new blink::WebScreenInfo);
 585     GetWebScreenInfo(screen_info_.get());
 586   }
 587   resize_params->screen_info = *screen_info_;
 588   resize_params->resizer_rect = GetRootWindowResizerRect();
 589
 590   if (view_) {
 591     resize_params->new_size = view_->GetRequestedRendererSize();
 592     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 593     resize_params->top_controls_height = view_->GetTopControlsHeight();
 594     resize_params->top_controls_shrink_blink_size =
 595         view_->DoTopControlsShrinkBlinkSize();
 596     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 597     resize_params->is_fullscreen = IsFullscreen();
 598   }
 599
 600   const bool size_changed =
 601       !old_resize_params_ ||
 602       old_resize_params_->new_size != resize_params->new_size ||
 603       (old_resize_params_->physical_backing_size.IsEmpty() &&
 604        !resize_params->physical_backing_size.IsEmpty());
 605   bool dirty =
 606       size_changed || screen_info_out_of_date_ ||
 607       old_resize_params_->physical_backing_size !=
 608           resize_params->physical_backing_size ||
 609       old_resize_params_->is_fullscreen != resize_params->is_fullscreen ||
 610       old_resize_params_->top_controls_height !=
 611           resize_params->top_controls_height ||
 612       old_resize_params_->top_controls_shrink_blink_size !=
 613           resize_params->top_controls_shrink_blink_size ||
 614       old_resize_params_->visible_viewport_size !=
 615           resize_params->visible_viewport_size;
 616
 617   // We don't expect to receive an ACK when the requested size or the physical
 618   // backing size is empty, or when the main viewport size didn't change.
 619   resize_params->needs_resize_ack =
 620       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 621       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 622
 623   return dirty;
 624 }
 625
 626 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 627     const ViewMsg_Resize_Params& resize_params) {
 628   resize_ack_pending_ = resize_params.needs_resize_ack;
 629
 630   old_resize_params_ =
 631       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 632 }
 633
 634 void RenderWidgetHostImpl::WasResized() {
 635   // Skip if the |delegate_| has already been detached because
 636   // it's web contents is being deleted.
 637   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 638       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 639     return;
 640   }
 641
 642   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 643   if (!GetResizeParams(params.get()))
 644     return;
 645
 646   bool width_changed =
 647       !old_resize_params_ ||
 648       old_resize_params_->new_size.width() != params->new_size.width();
 649   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 650     resize_ack_pending_ = params->needs_resize_ack;
 651     old_resize_params_.swap(params);
 652   }
 653
 654   if (delegate_)
 655     delegate_->RenderWidgetWasResized(this, width_changed);
 656 }
 657
 658 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 659   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 660 }
 661
 662 void RenderWidgetHostImpl::GotFocus() {
 663   Focus();
 664   if (delegate_)
 665     delegate_->RenderWidgetGotFocus(this);
 666 }
 667
 668 void RenderWidgetHostImpl::Focus() {
 669   is_focused_ = true;
 670
 671   Send(new InputMsg_SetFocus(routing_id_, true));
 672 }
 673
 674 void RenderWidgetHostImpl::Blur() {
 675   is_focused_ = false;
 676
 677   // If there is a pending mouse lock request, we don't want to reject it at
 678   // this point. The user can switch focus back to this view and approve the
 679   // request later.
 680   if (IsMouseLocked())
 681     view_->UnlockMouse();
 682
 683   if (touch_emulator_)
 684     touch_emulator_->CancelTouch();
 685
 686   Send(new InputMsg_SetFocus(routing_id_, false));
 687 }
 688
 689 void RenderWidgetHostImpl::LostCapture() {
 690   if (touch_emulator_)
 691     touch_emulator_->CancelTouch();
 692
 693   Send(new InputMsg_MouseCaptureLost(routing_id_));
 694 }
 695
 696 void RenderWidgetHostImpl::SetActive(bool active) {
 697   Send(new ViewMsg_SetActive(routing_id_, active));
 698 }
 699
 700 void RenderWidgetHostImpl::LostMouseLock() {
 701   Send(new ViewMsg_MouseLockLost(routing_id_));
 702 }
 703
 704 void RenderWidgetHostImpl::ViewDestroyed() {
 705   RejectMouseLockOrUnlockIfNecessary();
 706
 707   // TODO(evanm): tracking this may no longer be necessary;
 708   // eliminate this function if so.
 709   SetView(NULL);
 710 }
 711
 712 void RenderWidgetHostImpl::CopyFromBackingStore(
 713     const gfx::Rect& src_subrect,
 714     const gfx::Size& accelerated_dst_size,
 715     ReadbackRequestCallback& callback,
 716     const SkColorType color_type) {
 717   if (view_) {
 718     TRACE_EVENT0("browser",
 719         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 720     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 721         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 722     view_->CopyFromCompositingSurface(
 723         accelerated_copy_rect, accelerated_dst_size, callback, color_type);
 724     return;
 725   }
 726
 727   callback.Run(SkBitmap(), content::READBACK_FAILED);
 728 }
 729
 730 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 731   if (view_)
 732     return view_->IsSurfaceAvailableForCopy();
 733   return false;
 734 }
 735
 736 #if defined(OS_ANDROID)
 737 void RenderWidgetHostImpl::LockBackingStore() {
 738   if (view_)
 739     view_->LockCompositingSurface();
 740 }
 741
 742 void RenderWidgetHostImpl::UnlockBackingStore() {
 743   if (view_)
 744     view_->UnlockCompositingSurface();
 745 }
 746 #endif
 747
 748 #if defined(OS_MACOSX)
 749 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 750   TRACE_EVENT0("browser",
 751       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 752
 753   if (!CanPauseForPendingResizeOrRepaints())
 754     return;
 755
 756   WaitForSurface();
 757 }
 758
 759 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 760   // Do not pause if the view is hidden.
 761   if (is_hidden())
 762     return false;
 763
 764   // Do not pause if there is not a paint or resize already coming.
 765   if (!repaint_ack_pending_ && !resize_ack_pending_)
 766     return false;
 767
 768   return true;
 769 }
 770
 771 void RenderWidgetHostImpl::WaitForSurface() {
 772   // How long to (synchronously) wait for the renderer to respond with a
 773   // new frame when our current frame doesn't exist or is the wrong size.
 774   // This timeout impacts the "choppiness" of our window resize.
 775   const int kPaintMsgTimeoutMS = 50;
 776
 777   if (!view_)
 778     return;
 779
 780   // The view_size will be current_size_ for auto-sized views and otherwise the
 781   // size of the view_. (For auto-sized views, current_size_ is updated during
 782   // UpdateRect messages.)
 783   gfx::Size view_size = current_size_;
 784   if (!auto_resize_enabled_) {
 785     // Get the desired size from the current view bounds.
 786     gfx::Rect view_rect = view_->GetViewBounds();
 787     if (view_rect.IsEmpty())
 788       return;
 789     view_size = view_rect.size();
 790   }
 791
 792   TRACE_EVENT2("renderer_host",
 793                "RenderWidgetHostImpl::WaitForSurface",
 794                "width",
 795                base::IntToString(view_size.width()),
 796                "height",
 797                base::IntToString(view_size.height()));
 798
 799   // We should not be asked to paint while we are hidden.  If we are hidden,
 800   // then it means that our consumer failed to call WasShown.
 801   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 802
 803   // We should never be called recursively; this can theoretically lead to
 804   // infinite recursion and almost certainly leads to lower performance.
 805   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 806   base::AutoReset<bool> auto_reset_in_get_backing_store(
 807       &in_get_backing_store_, true);
 808
 809   // We might have a surface that we can use already.
 810   if (view_->HasAcceleratedSurface(view_size))
 811     return;
 812
 813   // Request that the renderer produce a frame of the right size, if it
 814   // hasn't been requested already.
 815   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 816     repaint_start_time_ = TimeTicks::Now();
 817     repaint_ack_pending_ = true;
 818     TRACE_EVENT_ASYNC_BEGIN0(
 819         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 820     Send(new ViewMsg_Repaint(routing_id_, view_size));
 821   }
 822
 823   // Pump a nested message loop until we time out or get a frame of the right
 824   // size.
 825   TimeTicks start_time = TimeTicks::Now();
 826   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 827   TimeTicks timeout_time = start_time + time_left;
 828   while (1) {
 829     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 830     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 831       // For auto-resized views, current_size_ determines the view_size and it
 832       // may have changed during the handling of an UpdateRect message.
 833       if (auto_resize_enabled_)
 834         view_size = current_size_;
 835       if (view_->HasAcceleratedSurface(view_size))
 836         break;
 837     }
 838     time_left = timeout_time - TimeTicks::Now();
 839     if (time_left <= TimeDelta::FromSeconds(0)) {
 840       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 841       break;
 842     }
 843   }
 844
 845   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 846                              TimeTicks::Now() - start_time,
 847                              TimeDelta::FromMilliseconds(1),
 848                              TimeDelta::FromMilliseconds(200), 50);
 849 }
 850 #endif
 851
 852 bool RenderWidgetHostImpl::ScheduleComposite() {
 853   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 854       resize_ack_pending_) {
 855     return false;
 856   }
 857
 858   // Send out a request to the renderer to paint the view if required.
 859   repaint_start_time_ = TimeTicks::Now();
 860   repaint_ack_pending_ = true;
 861   TRACE_EVENT_ASYNC_BEGIN0(
 862       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 863   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 864   return true;
 865 }
 866
 867 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 868   if (hang_monitor_timeout_)
 869     hang_monitor_timeout_->Start(delay);
 870 }
 871
 872 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 873   if (hang_monitor_timeout_)
 874     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 875 }
 876
 877 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 878   if (hang_monitor_timeout_)
 879     hang_monitor_timeout_->Stop();
 880   RendererIsResponsive();
 881 }
 882
 883 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 884   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 885 }
 886
 887 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 888       const blink::WebMouseEvent& mouse_event,
 889       const ui::LatencyInfo& ui_latency) {
 890   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 891                "x", mouse_event.x, "y", mouse_event.y);
 892
 893   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 894     if (mouse_event_callbacks_[i].Run(mouse_event))
 895       return;
 896   }
 897
 898   if (IgnoreInputEvents())
 899     return;
 900
 901   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 902     return;
 903
 904   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 905   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 906   input_router_->SendMouseEvent(mouse_with_latency);
 907
 908   // Pass mouse state to gpu service if the subscribe uniform
 909   // extension is enabled.
 910   if (process_->SubscribeUniformEnabled()) {
 911     gpu::ValueState state;
 912     state.int_value[0] = mouse_event.x;
 913     state.int_value[1] = mouse_event.y;
 914     // TODO(orglofch) Separate the mapping of pending value states to the
 915     // Gpu Service to be per RWH not per process
 916     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 917   }
 918 }
 919
 920 void RenderWidgetHostImpl::ForwardWheelEvent(
 921     const WebMouseWheelEvent& wheel_event) {
 922   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 923 }
 924
 925 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 926       const blink::WebMouseWheelEvent& wheel_event,
 927       const ui::LatencyInfo& ui_latency) {
 928   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 929
 930   if (IgnoreInputEvents())
 931     return;
 932
 933   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 934     return;
 935
 936   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 937   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 938   input_router_->SendWheelEvent(wheel_with_latency);
 939 }
 940
 941 void RenderWidgetHostImpl::ForwardGestureEvent(
 942     const blink::WebGestureEvent& gesture_event) {
 943   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 944 }
 945
 946 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 947     const blink::WebGestureEvent& gesture_event,
 948     const ui::LatencyInfo& ui_latency) {
 949   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 950   // Early out if necessary, prior to performing latency logic.
 951   if (IgnoreInputEvents())
 952     return;
 953
 954   if (delegate_->PreHandleGestureEvent(gesture_event))
 955     return;
 956
 957   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 958   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 959   input_router_->SendGestureEvent(gesture_with_latency);
 960 }
 961
 962 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 963       const blink::WebTouchEvent& touch_event) {
 964   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 965
 966   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 967   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 968   input_router_->SendTouchEvent(touch_with_latency);
 969 }
 970
 971 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 972       const blink::WebTouchEvent& touch_event,
 973       const ui::LatencyInfo& ui_latency) {
 974   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 975
 976   // Always forward TouchEvents for touch stream consistency. They will be
 977   // ignored if appropriate in FilterInputEvent().
 978
 979   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
 980   if (touch_emulator_ &&
 981       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 982     if (view_) {
 983       view_->ProcessAckedTouchEvent(
 984           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 985     }
 986     return;
 987   }
 988
 989   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 990   input_router_->SendTouchEvent(touch_with_latency);
 991 }
 992
 993 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 994     const NativeWebKeyboardEvent& key_event) {
 995   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 996   if (IgnoreInputEvents())
 997     return;
 998
 999   if (!process_->HasConnection())
1000     return;
1001
1002   // First, let keypress listeners take a shot at handling the event.  If a
1003   // listener handles the event, it should not be propagated to the renderer.
1004   if (KeyPressListenersHandleEvent(key_event)) {
1005     // Some keypresses that are accepted by the listener might have follow up
1006     // char events, which should be ignored.
1007     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1008       suppress_next_char_events_ = true;
1009     return;
1010   }
1011
1012   if (key_event.type == WebKeyboardEvent::Char &&
1013       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1014        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1015     OnUserGesture();
1016   }
1017
1018   // Double check the type to make sure caller hasn't sent us nonsense that
1019   // will mess up our key queue.
1020   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1021     return;
1022
1023   if (suppress_next_char_events_) {
1024     // If preceding RawKeyDown event was handled by the browser, then we need
1025     // suppress all Char events generated by it. Please note that, one
1026     // RawKeyDown event may generate multiple Char events, so we can't reset
1027     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1028     if (key_event.type == WebKeyboardEvent::Char)
1029       return;
1030     // We get a KeyUp or a RawKeyDown event.
1031     suppress_next_char_events_ = false;
1032   }
1033
1034   bool is_shortcut = false;
1035
1036   // Only pre-handle the key event if it's not handled by the input method.
1037   if (delegate_ && !key_event.skip_in_browser) {
1038     // We need to set |suppress_next_char_events_| to true if
1039     // PreHandleKeyboardEvent() returns true, but |this| may already be
1040     // destroyed at that time. So set |suppress_next_char_events_| true here,
1041     // then revert it afterwards when necessary.
1042     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1043       suppress_next_char_events_ = true;
1044
1045     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1046     // a hung/malicious renderer from interfering.
1047     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1048       return;
1049
1050     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1051       suppress_next_char_events_ = false;
1052   }
1053
1054   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1055     return;
1056
1057   ui::LatencyInfo latency;
1058   latency_tracker_.OnInputEvent(key_event, &latency);
1059   input_router_->SendKeyboardEvent(key_event, latency, is_shortcut);
1060 }
1061
1062 void RenderWidgetHostImpl::QueueSyntheticGesture(
1063     scoped_ptr<SyntheticGesture> synthetic_gesture,
1064     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1065   if (!synthetic_gesture_controller_ && view_) {
1066     synthetic_gesture_controller_.reset(
1067         new SyntheticGestureController(
1068             view_->CreateSyntheticGestureTarget().Pass()));
1069   }
1070   if (synthetic_gesture_controller_) {
1071     synthetic_gesture_controller_->QueueSyntheticGesture(
1072         synthetic_gesture.Pass(), on_complete);
1073   }
1074 }
1075
1076 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1077   if (!view_)
1078     return;
1079   view_->UpdateCursor(cursor);
1080 }
1081
1082 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1083   Send(new ViewMsg_ShowContextMenu(
1084       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1085 }
1086
1087 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1088   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1089 }
1090
1091 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1092   return latency_tracker_.latency_component_id();
1093 }
1094
1095 // static
1096 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1097   g_check_for_pending_resize_ack = false;
1098 }
1099
1100 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1101     const KeyPressEventCallback& callback) {
1102   key_press_event_callbacks_.push_back(callback);
1103 }
1104
1105 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1106     const KeyPressEventCallback& callback) {
1107   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1108     if (key_press_event_callbacks_[i].Equals(callback)) {
1109       key_press_event_callbacks_.erase(
1110           key_press_event_callbacks_.begin() + i);
1111       return;
1112     }
1113   }
1114 }
1115
1116 void RenderWidgetHostImpl::AddMouseEventCallback(
1117     const MouseEventCallback& callback) {
1118   mouse_event_callbacks_.push_back(callback);
1119 }
1120
1121 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1122     const MouseEventCallback& callback) {
1123   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1124     if (mouse_event_callbacks_[i].Equals(callback)) {
1125       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1126       return;
1127     }
1128   }
1129 }
1130
1131 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1132   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1133   if (view_)
1134     view_->GetScreenInfo(result);
1135   else
1136     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1137   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1138   screen_info_out_of_date_ = false;
1139 }
1140
1141 const NativeWebKeyboardEvent*
1142     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1143   return input_router_->GetLastKeyboardEvent();
1144 }
1145
1146 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1147   if (delegate_)
1148     delegate_->ScreenInfoChanged();
1149
1150   // The resize message (which may not happen immediately) will carry with it
1151   // the screen info as well as the new size (if the screen has changed scale
1152   // factor).
1153   InvalidateScreenInfo();
1154   WasResized();
1155 }
1156
1157 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1158   screen_info_out_of_date_ = true;
1159   screen_info_.reset();
1160 }
1161
1162 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1163     const base::Callback<void(const unsigned char*,size_t)> callback) {
1164   int id = next_browser_snapshot_id_++;
1165   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1166   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1167 }
1168
1169 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1170                                               size_t offset,
1171                                               const gfx::Range& range) {
1172   if (view_)
1173     view_->SelectionChanged(text, offset, range);
1174 }
1175
1176 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1177     const ViewHostMsg_SelectionBounds_Params& params) {
1178   if (view_) {
1179     view_->SelectionBoundsChanged(params);
1180   }
1181 }
1182
1183 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1184                                                  base::TimeDelta interval) {
1185   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1186 }
1187
1188 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1189                                           int exit_code) {
1190   // Clearing this flag causes us to re-create the renderer when recovering
1191   // from a crashed renderer.
1192   renderer_initialized_ = false;
1193
1194   waiting_for_screen_rects_ack_ = false;
1195
1196   // Must reset these to ensure that keyboard events work with a new renderer.
1197   suppress_next_char_events_ = false;
1198
1199   // Reset some fields in preparation for recovering from a crash.
1200   ResetSizeAndRepaintPendingFlags();
1201   current_size_.SetSize(0, 0);
1202   // After the renderer crashes, the view is destroyed and so the
1203   // RenderWidgetHost cannot track its visibility anymore. We assume such
1204   // RenderWidgetHost to be visible for the sake of internal accounting - be
1205   // careful about changing this - see http://crbug.com/401859.
1206   //
1207   // We need to at least make sure that the RenderProcessHost is notified about
1208   // the |is_hidden_| change, so that the renderer will have correct visibility
1209   // set when respawned.
1210   if (is_hidden_) {
1211     process_->WidgetRestored();
1212     is_hidden_ = false;
1213   }
1214
1215   // Reset this to ensure the hung renderer mechanism is working properly.
1216   in_flight_event_count_ = 0;
1217   StopHangMonitorTimeout();
1218
1219   if (view_) {
1220     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1221                                                gfx::GLSurfaceHandle());
1222     view_->RenderProcessGone(status, exit_code);
1223     view_ = NULL; // The View should be deleted by RenderProcessGone.
1224     view_weak_.reset();
1225   }
1226
1227   // Reconstruct the input router to ensure that it has fresh state for a new
1228   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1229   // event. (In particular, the above call to view_->RenderProcessGone will
1230   // destroy the aura window, which may dispatch a synthetic mouse move.)
1231   input_router_.reset(new InputRouterImpl(
1232       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1233
1234   synthetic_gesture_controller_.reset();
1235 }
1236
1237 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1238   text_direction_updated_ = true;
1239   text_direction_ = direction;
1240 }
1241
1242 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1243   if (text_direction_updated_)
1244     text_direction_canceled_ = true;
1245 }
1246
1247 void RenderWidgetHostImpl::NotifyTextDirection() {
1248   if (text_direction_updated_) {
1249     if (!text_direction_canceled_)
1250       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1251     text_direction_updated_ = false;
1252     text_direction_canceled_ = false;
1253   }
1254 }
1255
1256 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1257   input_method_active_ = activate;
1258   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1259 }
1260
1261 void RenderWidgetHostImpl::CandidateWindowShown() {
1262   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1263 }
1264
1265 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1266   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1267 }
1268
1269 void RenderWidgetHostImpl::CandidateWindowHidden() {
1270   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
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::IsFullscreen() const {
1321   return false;
1322 }
1323
1324 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1325                                          const gfx::Size& min_size,
1326                                          const gfx::Size& max_size) {
1327   auto_resize_enabled_ = enable;
1328   min_size_for_auto_resize_ = min_size;
1329   max_size_for_auto_resize_ = max_size;
1330 }
1331
1332 void RenderWidgetHostImpl::Cleanup() {
1333   if (view_) {
1334     view_->Destroy();
1335     view_ = nullptr;
1336   }
1337 }
1338
1339 void RenderWidgetHostImpl::Destroy() {
1340   NotificationService::current()->Notify(
1341       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1342       Source<RenderWidgetHost>(this),
1343       NotificationService::NoDetails());
1344
1345   // Tell the view to die.
1346   // Note that in the process of the view shutting down, it can call a ton
1347   // of other messages on us.  So if you do any other deinitialization here,
1348   // do it after this call to view_->Destroy().
1349   if (view_) {
1350     view_->Destroy();
1351     view_ = nullptr;
1352   }
1353
1354   delete this;
1355 }
1356
1357 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1358   NotificationService::current()->Notify(
1359       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1360       Source<RenderWidgetHost>(this),
1361       NotificationService::NoDetails());
1362   is_unresponsive_ = true;
1363   NotifyRendererUnresponsive();
1364 }
1365
1366 void RenderWidgetHostImpl::RendererIsResponsive() {
1367   if (is_unresponsive_) {
1368     is_unresponsive_ = false;
1369     NotifyRendererResponsive();
1370   }
1371 }
1372
1373 void RenderWidgetHostImpl::OnRenderViewReady() {
1374   SendScreenRects();
1375   WasResized();
1376 }
1377
1378 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1379   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1380   // it handles destruction.
1381   if (!owned_by_render_frame_host_) {
1382     // TODO(evanm): This synchronously ends up calling "delete this".
1383     // Is that really what we want in response to this message?  I'm matching
1384     // previous behavior of the code here.
1385     Destroy();
1386   } else {
1387     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1388   }
1389 }
1390
1391 void RenderWidgetHostImpl::OnClose() {
1392   Shutdown();
1393 }
1394
1395 void RenderWidgetHostImpl::OnSetTooltipText(
1396     const base::string16& tooltip_text,
1397     WebTextDirection text_direction_hint) {
1398   // First, add directionality marks around tooltip text if necessary.
1399   // A naive solution would be to simply always wrap the text. However, on
1400   // windows, Unicode directional embedding characters can't be displayed on
1401   // systems that lack RTL fonts and are instead displayed as empty squares.
1402   //
1403   // To get around this we only wrap the string when we deem it necessary i.e.
1404   // when the locale direction is different than the tooltip direction hint.
1405   //
1406   // Currently, we use element's directionality as the tooltip direction hint.
1407   // An alternate solution would be to set the overall directionality based on
1408   // trying to detect the directionality from the tooltip text rather than the
1409   // element direction.  One could argue that would be a preferable solution
1410   // but we use the current approach to match Fx & IE's behavior.
1411   base::string16 wrapped_tooltip_text = tooltip_text;
1412   if (!tooltip_text.empty()) {
1413     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1414       // Force the tooltip to have LTR directionality.
1415       wrapped_tooltip_text =
1416           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1417     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1418                !base::i18n::IsRTL()) {
1419       // Force the tooltip to have RTL directionality.
1420       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1421     }
1422   }
1423   if (GetView())
1424     view_->SetTooltipText(wrapped_tooltip_text);
1425 }
1426
1427 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1428   waiting_for_screen_rects_ack_ = false;
1429   if (!view_)
1430     return;
1431
1432   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1433       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1434     return;
1435   }
1436
1437   SendScreenRects();
1438 }
1439
1440 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1441   if (view_) {
1442     view_->SetBounds(pos);
1443     Send(new ViewMsg_Move_ACK(routing_id_));
1444   }
1445 }
1446
1447 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1448     const IPC::Message& message) {
1449   // This trace event is used in
1450   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1451   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1452   ViewHostMsg_SwapCompositorFrame::Param param;
1453   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1454     return false;
1455   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1456   uint32 output_surface_id = get<0>(param);
1457   get<1>(param).AssignTo(frame.get());
1458   std::vector<IPC::Message> messages_to_deliver_with_frame;
1459   messages_to_deliver_with_frame.swap(get<2>(param));
1460
1461   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1462
1463   input_router_->OnViewUpdated(
1464       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1465
1466   if (touch_emulator_) {
1467     touch_emulator_->SetDoubleTapSupportForPageEnabled(
1468         !IsMobileOptimizedFrame(frame->metadata));
1469   }
1470
1471   if (view_) {
1472     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1473     view_->DidReceiveRendererFrame();
1474   } else {
1475     cc::CompositorFrameAck ack;
1476     if (frame->gl_frame_data) {
1477       ack.gl_frame_data = frame->gl_frame_data.Pass();
1478       ack.gl_frame_data->sync_point = 0;
1479     } else if (frame->delegated_frame_data) {
1480       cc::TransferableResource::ReturnResources(
1481           frame->delegated_frame_data->resource_list,
1482           &ack.resources);
1483     } else if (frame->software_frame_data) {
1484       ack.last_software_frame_id = frame->software_frame_data->id;
1485     }
1486     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1487                                process_->GetID(), ack);
1488   }
1489
1490   RenderProcessHost* rph = GetProcess();
1491   for (std::vector<IPC::Message>::const_iterator i =
1492            messages_to_deliver_with_frame.begin();
1493        i != messages_to_deliver_with_frame.end();
1494        ++i) {
1495     rph->OnMessageReceived(*i);
1496     if (i->dispatch_error())
1497       rph->OnBadMessageReceived(*i);
1498   }
1499   messages_to_deliver_with_frame.clear();
1500
1501   return true;
1502 }
1503
1504 void RenderWidgetHostImpl::OnUpdateRect(
1505     const ViewHostMsg_UpdateRect_Params& params) {
1506   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1507   TimeTicks paint_start = TimeTicks::Now();
1508
1509   // Update our knowledge of the RenderWidget's size.
1510   current_size_ = params.view_size;
1511
1512   bool is_resize_ack =
1513       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1514
1515   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1516   // that will end up reaching GetBackingStore.
1517   if (is_resize_ack) {
1518     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1519     resize_ack_pending_ = false;
1520   }
1521
1522   bool is_repaint_ack =
1523       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1524   if (is_repaint_ack) {
1525     DCHECK(repaint_ack_pending_);
1526     TRACE_EVENT_ASYNC_END0(
1527         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1528     repaint_ack_pending_ = false;
1529     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1530     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1531   }
1532
1533   DCHECK(!params.view_size.IsEmpty());
1534
1535   DidUpdateBackingStore(params, paint_start);
1536
1537   if (auto_resize_enabled_) {
1538     bool post_callback = new_auto_size_.IsEmpty();
1539     new_auto_size_ = params.view_size;
1540     if (post_callback) {
1541       base::MessageLoop::current()->PostTask(
1542           FROM_HERE,
1543           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1544                      weak_factory_.GetWeakPtr()));
1545     }
1546   }
1547
1548   // Log the time delta for processing a paint message. On platforms that don't
1549   // support asynchronous painting, this is equivalent to
1550   // MPArch.RWH_TotalPaintTime.
1551   TimeDelta delta = TimeTicks::Now() - paint_start;
1552   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1553 }
1554
1555 void RenderWidgetHostImpl::DidUpdateBackingStore(
1556     const ViewHostMsg_UpdateRect_Params& params,
1557     const TimeTicks& paint_start) {
1558   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1559   TimeTicks update_start = TimeTicks::Now();
1560
1561   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1562   // will not be re-issued, so must move them now, regardless of whether we
1563   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1564   // in the process could dispatch other window messages which could cause the
1565   // view to be destroyed.
1566   if (view_)
1567     view_->MovePluginWindows(params.plugin_window_moves);
1568
1569   NotificationService::current()->Notify(
1570       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1571       Source<RenderWidgetHost>(this),
1572       NotificationService::NoDetails());
1573
1574   // We don't need to update the view if the view is hidden. We must do this
1575   // early return after the ACK is sent, however, or the renderer will not send
1576   // us more data.
1577   if (is_hidden_)
1578     return;
1579
1580   // If we got a resize ack, then perhaps we have another resize to send?
1581   bool is_resize_ack =
1582       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1583   if (is_resize_ack)
1584     WasResized();
1585
1586   // Log the time delta for processing a paint message.
1587   TimeTicks now = TimeTicks::Now();
1588   TimeDelta delta = now - update_start;
1589   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1590 }
1591
1592 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1593     const SyntheticGesturePacket& gesture_packet) {
1594   // Only allow untrustworthy gestures if explicitly enabled.
1595   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1596           cc::switches::kEnableGpuBenchmarking)) {
1597     bad_message::ReceivedBadMessage(GetProcess(),
1598                                     bad_message::RWH_SYNTHETIC_GESTURE);
1599     return;
1600   }
1601
1602   QueueSyntheticGesture(
1603         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1604         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1605                    weak_factory_.GetWeakPtr()));
1606 }
1607
1608 void RenderWidgetHostImpl::OnFocus() {
1609   // Only RenderViewHost can deal with that message.
1610   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1611 }
1612
1613 void RenderWidgetHostImpl::OnBlur() {
1614   // Only RenderViewHost can deal with that message.
1615   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1616 }
1617
1618 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1619   SetCursor(cursor);
1620 }
1621
1622 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1623     bool enabled, ui::GestureProviderConfigType config_type) {
1624   if (enabled) {
1625     if (!touch_emulator_)
1626       touch_emulator_.reset(new TouchEmulator(this));
1627     touch_emulator_->Enable(config_type);
1628   } else {
1629     if (touch_emulator_)
1630       touch_emulator_->Disable();
1631   }
1632 }
1633
1634 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1635     ui::TextInputType type,
1636     ui::TextInputMode input_mode,
1637     bool can_compose_inline,
1638     int flags) {
1639   if (view_)
1640     view_->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
1641 }
1642
1643 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1644     const gfx::Range& range,
1645     const std::vector<gfx::Rect>& character_bounds) {
1646   if (view_)
1647     view_->ImeCompositionRangeChanged(range, character_bounds);
1648 }
1649
1650 void RenderWidgetHostImpl::OnImeCancelComposition() {
1651   if (view_)
1652     view_->ImeCancelComposition();
1653 }
1654
1655 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1656                                        bool last_unlocked_by_target,
1657                                        bool privileged) {
1658
1659   if (pending_mouse_lock_request_) {
1660     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1661     return;
1662   } else if (IsMouseLocked()) {
1663     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1664     return;
1665   }
1666
1667   pending_mouse_lock_request_ = true;
1668   if (privileged && allow_privileged_mouse_lock_) {
1669     // Directly approve to lock the mouse.
1670     GotResponseToLockMouseRequest(true);
1671   } else {
1672     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1673   }
1674 }
1675
1676 void RenderWidgetHostImpl::OnUnlockMouse() {
1677   RejectMouseLockOrUnlockIfNecessary();
1678 }
1679
1680 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1681     const gfx::Rect& rect_pixels,
1682     const gfx::Size& size,
1683     const cc::SharedBitmapId& id) {
1684   DCHECK(!rect_pixels.IsEmpty());
1685   DCHECK(!size.IsEmpty());
1686
1687   scoped_ptr<cc::SharedBitmap> bitmap =
1688       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1689   if (!bitmap) {
1690     bad_message::ReceivedBadMessage(GetProcess(),
1691                                     bad_message::RWH_SHARED_BITMAP);
1692     return;
1693   }
1694
1695   DCHECK(bitmap->pixels());
1696
1697   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1698   SkBitmap zoomed_bitmap;
1699   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1700
1701   // Note that |rect| is in coordinates of pixels relative to the window origin.
1702   // Aura-based systems will want to convert this to DIPs.
1703   if (view_)
1704     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1705
1706   // It is assumed that the disambiguation popup will make a copy of the
1707   // provided zoomed image, so we delete this one.
1708   zoomed_bitmap.setPixels(0);
1709   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1710 }
1711
1712 #if defined(OS_WIN)
1713 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1714     gfx::NativeViewId dummy_activation_window) {
1715   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1716
1717   // This may happen as a result of a race condition when the plugin is going
1718   // away.
1719   wchar_t window_title[MAX_PATH + 1] = {0};
1720   if (!IsWindow(hwnd) ||
1721       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1722       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1723     return;
1724   }
1725
1726 #if defined(USE_AURA)
1727   SetParent(hwnd,
1728             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1729 #else
1730   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1731 #endif
1732   dummy_windows_for_activation_.push_back(hwnd);
1733 }
1734
1735 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1736     gfx::NativeViewId dummy_activation_window) {
1737   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1738   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1739   for (; i != dummy_windows_for_activation_.end(); ++i) {
1740     if ((*i) == hwnd) {
1741       dummy_windows_for_activation_.erase(i);
1742       return;
1743     }
1744   }
1745   NOTREACHED() << "Unknown dummy window";
1746 }
1747 #endif
1748
1749 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1750   ignore_input_events_ = ignore_input_events;
1751 }
1752
1753 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1754     const NativeWebKeyboardEvent& event) {
1755   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1756     return false;
1757
1758   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1759     size_t original_size = key_press_event_callbacks_.size();
1760     if (key_press_event_callbacks_[i].Run(event))
1761       return true;
1762
1763     // Check whether the callback that just ran removed itself, in which case
1764     // the iterator needs to be decremented to properly account for the removal.
1765     size_t current_size = key_press_event_callbacks_.size();
1766     if (current_size != original_size) {
1767       DCHECK_EQ(original_size - 1, current_size);
1768       --i;
1769     }
1770   }
1771
1772   return false;
1773 }
1774
1775 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1776     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1777   // Don't ignore touch cancel events, since they may be sent while input
1778   // events are being ignored in order to keep the renderer from getting
1779   // confused about how many touches are active.
1780   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1781     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1782
1783   if (!process_->HasConnection())
1784     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1785
1786   if (event.type == WebInputEvent::MouseDown)
1787     OnUserGesture();
1788
1789   return view_ ? view_->FilterInputEvent(event)
1790                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1791 }
1792
1793 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1794   increment_in_flight_event_count();
1795   if (!is_hidden_)
1796     StartHangMonitorTimeout(hung_renderer_delay_);
1797 }
1798
1799 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1800   if (decrement_in_flight_event_count() <= 0) {
1801     // Cancel pending hung renderer checks since the renderer is responsive.
1802     StopHangMonitorTimeout();
1803   } else {
1804     // The renderer is responsive, but there are in-flight events to wait for.
1805     if (!is_hidden_)
1806       RestartHangMonitorTimeout();
1807   }
1808 }
1809
1810 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1811   has_touch_handler_ = has_handlers;
1812 }
1813
1814 void RenderWidgetHostImpl::DidFlush() {
1815   if (synthetic_gesture_controller_)
1816     synthetic_gesture_controller_->OnDidFlushInput();
1817 }
1818
1819 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1820   if (view_)
1821     view_->DidOverscroll(params);
1822 }
1823
1824 void RenderWidgetHostImpl::DidStopFlinging() {
1825   if (view_)
1826     view_->DidStopFlinging();
1827 }
1828
1829 void RenderWidgetHostImpl::OnKeyboardEventAck(
1830       const NativeWebKeyboardEvent& event,
1831       InputEventAckState ack_result) {
1832 #if defined(OS_MACOSX)
1833   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1834     return;
1835 #endif
1836
1837   // We only send unprocessed key event upwards if we are not hidden,
1838   // because the user has moved away from us and no longer expect any effect
1839   // of this key event.
1840   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1841   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1842     delegate_->HandleKeyboardEvent(event);
1843
1844     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1845     // (i.e.  in the case of Ctrl+W, where the call to
1846     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1847   }
1848 }
1849
1850 void RenderWidgetHostImpl::OnWheelEventAck(
1851     const MouseWheelEventWithLatencyInfo& wheel_event,
1852     InputEventAckState ack_result) {
1853   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1854
1855   if (!is_hidden() && view_) {
1856     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1857         delegate_->HandleWheelEvent(wheel_event.event)) {
1858       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1859     }
1860     view_->WheelEventAck(wheel_event.event, ack_result);
1861   }
1862 }
1863
1864 void RenderWidgetHostImpl::OnGestureEventAck(
1865     const GestureEventWithLatencyInfo& event,
1866     InputEventAckState ack_result) {
1867   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1868
1869   if (view_)
1870     view_->GestureEventAck(event.event, ack_result);
1871 }
1872
1873 void RenderWidgetHostImpl::OnTouchEventAck(
1874     const TouchEventWithLatencyInfo& event,
1875     InputEventAckState ack_result) {
1876   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1877
1878   if (touch_emulator_ &&
1879       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1880     return;
1881   }
1882
1883   if (view_)
1884     view_->ProcessAckedTouchEvent(event, ack_result);
1885 }
1886
1887 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1888   if (type == BAD_ACK_MESSAGE) {
1889     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1890   } else if (type == UNEXPECTED_EVENT_TYPE) {
1891     suppress_next_char_events_ = false;
1892   }
1893 }
1894
1895 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1896     SyntheticGesture::Result result) {
1897   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1898 }
1899
1900 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1901   return ignore_input_events_ || process_->IgnoreInputEvents();
1902 }
1903
1904 void RenderWidgetHostImpl::StartUserGesture() {
1905   OnUserGesture();
1906 }
1907
1908 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1909   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1910 }
1911
1912 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1913     const std::vector<EditCommand>& commands) {
1914   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1915 }
1916
1917 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1918                                               const std::string& value) {
1919   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1920 }
1921
1922 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1923     const gfx::Rect& rect) {
1924   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1925 }
1926
1927 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1928   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1929 }
1930
1931 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1932   if (!allowed) {
1933     RejectMouseLockOrUnlockIfNecessary();
1934     return false;
1935   } else {
1936     if (!pending_mouse_lock_request_) {
1937       // This is possible, e.g., the plugin sends us an unlock request before
1938       // the user allows to lock to mouse.
1939       return false;
1940     }
1941
1942     pending_mouse_lock_request_ = false;
1943     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1944       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1945       return false;
1946     } else {
1947       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1948       return true;
1949     }
1950   }
1951 }
1952
1953 // static
1954 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1955     int32 route_id,
1956     uint32 output_surface_id,
1957     int renderer_host_id,
1958     const cc::CompositorFrameAck& ack) {
1959   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1960   if (!host)
1961     return;
1962   host->Send(new ViewMsg_SwapCompositorFrameAck(
1963       route_id, output_surface_id, ack));
1964 }
1965
1966 // static
1967 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1968     int32 route_id,
1969     uint32 output_surface_id,
1970     int renderer_host_id,
1971     const cc::CompositorFrameAck& ack) {
1972   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1973   if (!host)
1974     return;
1975   host->Send(
1976       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1977 }
1978
1979 void RenderWidgetHostImpl::DelayedAutoResized() {
1980   gfx::Size new_size = new_auto_size_;
1981   // Clear the new_auto_size_ since the empty value is used as a flag to
1982   // indicate that no callback is in progress (i.e. without this line
1983   // DelayedAutoResized will not get called again).
1984   new_auto_size_.SetSize(0, 0);
1985   if (!auto_resize_enabled_)
1986     return;
1987
1988   OnRenderAutoResized(new_size);
1989 }
1990
1991 void RenderWidgetHostImpl::DetachDelegate() {
1992   delegate_ = NULL;
1993 }
1994
1995 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
1996   ui::LatencyInfo::LatencyComponent window_snapshot_component;
1997   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
1998                                GetLatencyComponentId(),
1999                                &window_snapshot_component)) {
2000     int sequence_number = static_cast<int>(
2001         window_snapshot_component.sequence_number);
2002 #if defined(OS_MACOSX)
2003     // On Mac, when using CoreAnmation, there is a delay between when content
2004     // is drawn to the screen, and when the snapshot will actually pick up
2005     // that content. Insert a manual delay of 1/6th of a second (to simulate
2006     // 10 frames at 60 fps) before actually taking the snapshot.
2007     base::MessageLoop::current()->PostDelayedTask(
2008         FROM_HERE,
2009         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2010                    weak_factory_.GetWeakPtr(),
2011                    sequence_number),
2012         base::TimeDelta::FromSecondsD(1. / 6));
2013 #else
2014     WindowSnapshotReachedScreen(sequence_number);
2015 #endif
2016   }
2017
2018   latency_tracker_.OnFrameSwapped(latency_info);
2019 }
2020
2021 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2022   view_->DidReceiveRendererFrame();
2023 }
2024
2025 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2026   DCHECK(base::MessageLoopForUI::IsCurrent());
2027
2028   gfx::Rect view_bounds = GetView()->GetViewBounds();
2029   gfx::Rect snapshot_bounds(view_bounds.size());
2030
2031   std::vector<unsigned char> png;
2032   if (ui::GrabViewSnapshot(
2033       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2034     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2035     return;
2036   }
2037
2038   ui::GrabViewSnapshotAsync(
2039       GetView()->GetNativeView(),
2040       snapshot_bounds,
2041       base::ThreadTaskRunnerHandle::Get(),
2042       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2043                  weak_factory_.GetWeakPtr(),
2044                  snapshot_id));
2045 }
2046
2047 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2048                                                   const unsigned char* data,
2049                                                   size_t size) {
2050   // Any pending snapshots with a lower ID than the one received are considered
2051   // to be implicitly complete, and returned the same snapshot data.
2052   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2053   while(it != pending_browser_snapshots_.end()) {
2054       if (it->first <= snapshot_id) {
2055         it->second.Run(data, size);
2056         pending_browser_snapshots_.erase(it++);
2057       } else {
2058         ++it;
2059       }
2060   }
2061 }
2062
2063 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2064     int snapshot_id,
2065     scoped_refptr<base::RefCountedBytes> png_data) {
2066   if (png_data.get())
2067     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2068   else
2069     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2070 }
2071
2072 // static
2073 void RenderWidgetHostImpl::CompositorFrameDrawn(
2074     const std::vector<ui::LatencyInfo>& latency_info) {
2075   for (size_t i = 0; i < latency_info.size(); i++) {
2076     std::set<RenderWidgetHostImpl*> rwhi_set;
2077     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2078              latency_info[i].latency_components.begin();
2079          b != latency_info[i].latency_components.end();
2080          ++b) {
2081       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2082           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2083           b->first.first == ui::TAB_SHOW_COMPONENT) {
2084         // Matches with GetLatencyComponentId
2085         int routing_id = b->first.second & 0xffffffff;
2086         int process_id = (b->first.second >> 32) & 0xffffffff;
2087         RenderWidgetHost* rwh =
2088             RenderWidgetHost::FromID(process_id, routing_id);
2089         if (!rwh) {
2090           continue;
2091         }
2092         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2093         if (rwhi_set.insert(rwhi).second)
2094           rwhi->FrameSwapped(latency_info[i]);
2095       }
2096     }
2097   }
2098 }
2099
2100 BrowserAccessibilityManager*
2101     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2102   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2103 }
2104
2105 BrowserAccessibilityManager*
2106     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2107   return delegate_ ?
2108       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2109 }
2110
2111 base::TimeDelta RenderWidgetHostImpl::GetEstimatedBrowserCompositeTime() const {
2112   return latency_tracker_.GetEstimatedBrowserCompositeTime();
2113 }
2114
2115 #if defined(OS_WIN)
2116 gfx::NativeViewAccessible
2117     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2118   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2119 }
2120 #endif
2121
2122 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
2123   if (view_)
2124     return view_->PreferredReadbackFormat();
2125   return kN32_SkColorType;
2126 }
2127
2128 }  // namespace content