content/browser/renderer_host/render_widget_host_impl.cc

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