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::OnPointerEventActivate() {
 921 }
 922
 923 void RenderWidgetHostImpl::ForwardWheelEvent(
 924     const WebMouseWheelEvent& wheel_event) {
 925   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 926 }
 927
 928 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 929       const blink::WebMouseWheelEvent& wheel_event,
 930       const ui::LatencyInfo& ui_latency) {
 931   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 932
 933   if (IgnoreInputEvents())
 934     return;
 935
 936   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 937     return;
 938
 939   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 940   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 941   input_router_->SendWheelEvent(wheel_with_latency);
 942 }
 943
 944 void RenderWidgetHostImpl::ForwardGestureEvent(
 945     const blink::WebGestureEvent& gesture_event) {
 946   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 947 }
 948
 949 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 950     const blink::WebGestureEvent& gesture_event,
 951     const ui::LatencyInfo& ui_latency) {
 952   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 953   // Early out if necessary, prior to performing latency logic.
 954   if (IgnoreInputEvents())
 955     return;
 956
 957   if (delegate_->PreHandleGestureEvent(gesture_event))
 958     return;
 959
 960   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 961   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 962   input_router_->SendGestureEvent(gesture_with_latency);
 963 }
 964
 965 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 966       const blink::WebTouchEvent& touch_event) {
 967   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 968
 969   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 970   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 971   input_router_->SendTouchEvent(touch_with_latency);
 972 }
 973
 974 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 975       const blink::WebTouchEvent& touch_event,
 976       const ui::LatencyInfo& ui_latency) {
 977   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 978
 979   // Always forward TouchEvents for touch stream consistency. They will be
 980   // ignored if appropriate in FilterInputEvent().
 981
 982   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
 983   if (touch_emulator_ &&
 984       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 985     if (view_) {
 986       view_->ProcessAckedTouchEvent(
 987           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 988     }
 989     return;
 990   }
 991
 992   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 993   input_router_->SendTouchEvent(touch_with_latency);
 994 }
 995
 996 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 997     const NativeWebKeyboardEvent& key_event) {
 998   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 999   if (IgnoreInputEvents())
1000     return;
1001
1002   if (!process_->HasConnection())
1003     return;
1004
1005   // First, let keypress listeners take a shot at handling the event.  If a
1006   // listener handles the event, it should not be propagated to the renderer.
1007   if (KeyPressListenersHandleEvent(key_event)) {
1008     // Some keypresses that are accepted by the listener might have follow up
1009     // char events, which should be ignored.
1010     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1011       suppress_next_char_events_ = true;
1012     return;
1013   }
1014
1015   if (key_event.type == WebKeyboardEvent::Char &&
1016       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1017        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1018     OnUserGesture();
1019   }
1020
1021   // Double check the type to make sure caller hasn't sent us nonsense that
1022   // will mess up our key queue.
1023   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1024     return;
1025
1026   if (suppress_next_char_events_) {
1027     // If preceding RawKeyDown event was handled by the browser, then we need
1028     // suppress all Char events generated by it. Please note that, one
1029     // RawKeyDown event may generate multiple Char events, so we can't reset
1030     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1031     if (key_event.type == WebKeyboardEvent::Char)
1032       return;
1033     // We get a KeyUp or a RawKeyDown event.
1034     suppress_next_char_events_ = false;
1035   }
1036
1037   bool is_shortcut = false;
1038
1039   // Only pre-handle the key event if it's not handled by the input method.
1040   if (delegate_ && !key_event.skip_in_browser) {
1041     // We need to set |suppress_next_char_events_| to true if
1042     // PreHandleKeyboardEvent() returns true, but |this| may already be
1043     // destroyed at that time. So set |suppress_next_char_events_| true here,
1044     // then revert it afterwards when necessary.
1045     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1046       suppress_next_char_events_ = true;
1047
1048     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1049     // a hung/malicious renderer from interfering.
1050     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1051       return;
1052
1053     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1054       suppress_next_char_events_ = false;
1055   }
1056
1057   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1058     return;
1059
1060   ui::LatencyInfo latency;
1061   latency_tracker_.OnInputEvent(key_event, &latency);
1062   input_router_->SendKeyboardEvent(key_event, latency, is_shortcut);
1063 }
1064
1065 void RenderWidgetHostImpl::QueueSyntheticGesture(
1066     scoped_ptr<SyntheticGesture> synthetic_gesture,
1067     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1068   if (!synthetic_gesture_controller_ && view_) {
1069     synthetic_gesture_controller_.reset(
1070         new SyntheticGestureController(
1071             view_->CreateSyntheticGestureTarget().Pass()));
1072   }
1073   if (synthetic_gesture_controller_) {
1074     synthetic_gesture_controller_->QueueSyntheticGesture(
1075         synthetic_gesture.Pass(), on_complete);
1076   }
1077 }
1078
1079 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1080   if (!view_)
1081     return;
1082   view_->UpdateCursor(cursor);
1083 }
1084
1085 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1086   Send(new ViewMsg_ShowContextMenu(
1087       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1088 }
1089
1090 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1091   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1092 }
1093
1094 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1095   return latency_tracker_.latency_component_id();
1096 }
1097
1098 // static
1099 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1100   g_check_for_pending_resize_ack = false;
1101 }
1102
1103 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1104     const KeyPressEventCallback& callback) {
1105   key_press_event_callbacks_.push_back(callback);
1106 }
1107
1108 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1109     const KeyPressEventCallback& callback) {
1110   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1111     if (key_press_event_callbacks_[i].Equals(callback)) {
1112       key_press_event_callbacks_.erase(
1113           key_press_event_callbacks_.begin() + i);
1114       return;
1115     }
1116   }
1117 }
1118
1119 void RenderWidgetHostImpl::AddMouseEventCallback(
1120     const MouseEventCallback& callback) {
1121   mouse_event_callbacks_.push_back(callback);
1122 }
1123
1124 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1125     const MouseEventCallback& callback) {
1126   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1127     if (mouse_event_callbacks_[i].Equals(callback)) {
1128       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1129       return;
1130     }
1131   }
1132 }
1133
1134 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1135   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1136   if (view_)
1137     view_->GetScreenInfo(result);
1138   else
1139     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1140   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1141   screen_info_out_of_date_ = false;
1142 }
1143
1144 const NativeWebKeyboardEvent*
1145     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1146   return input_router_->GetLastKeyboardEvent();
1147 }
1148
1149 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1150   if (delegate_)
1151     delegate_->ScreenInfoChanged();
1152
1153   // The resize message (which may not happen immediately) will carry with it
1154   // the screen info as well as the new size (if the screen has changed scale
1155   // factor).
1156   InvalidateScreenInfo();
1157   WasResized();
1158 }
1159
1160 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1161   screen_info_out_of_date_ = true;
1162   screen_info_.reset();
1163 }
1164
1165 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1166     const base::Callback<void(const unsigned char*,size_t)> callback) {
1167   int id = next_browser_snapshot_id_++;
1168   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1169   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1170 }
1171
1172 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1173                                               size_t offset,
1174                                               const gfx::Range& range) {
1175   if (view_)
1176     view_->SelectionChanged(text, offset, range);
1177 }
1178
1179 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1180     const ViewHostMsg_SelectionBounds_Params& params) {
1181   if (view_) {
1182     view_->SelectionBoundsChanged(params);
1183   }
1184 }
1185
1186 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1187                                                  base::TimeDelta interval) {
1188   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1189 }
1190
1191 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1192                                           int exit_code) {
1193   // Clearing this flag causes us to re-create the renderer when recovering
1194   // from a crashed renderer.
1195   renderer_initialized_ = false;
1196
1197   waiting_for_screen_rects_ack_ = false;
1198
1199   // Must reset these to ensure that keyboard events work with a new renderer.
1200   suppress_next_char_events_ = false;
1201
1202   // Reset some fields in preparation for recovering from a crash.
1203   ResetSizeAndRepaintPendingFlags();
1204   current_size_.SetSize(0, 0);
1205   // After the renderer crashes, the view is destroyed and so the
1206   // RenderWidgetHost cannot track its visibility anymore. We assume such
1207   // RenderWidgetHost to be visible for the sake of internal accounting - be
1208   // careful about changing this - see http://crbug.com/401859.
1209   //
1210   // We need to at least make sure that the RenderProcessHost is notified about
1211   // the |is_hidden_| change, so that the renderer will have correct visibility
1212   // set when respawned.
1213   if (is_hidden_) {
1214     process_->WidgetRestored();
1215     is_hidden_ = false;
1216   }
1217
1218   // Reset this to ensure the hung renderer mechanism is working properly.
1219   in_flight_event_count_ = 0;
1220   StopHangMonitorTimeout();
1221
1222   if (view_) {
1223     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1224                                                gfx::GLSurfaceHandle());
1225     view_->RenderProcessGone(status, exit_code);
1226     view_ = NULL; // The View should be deleted by RenderProcessGone.
1227     view_weak_.reset();
1228   }
1229
1230   // Reconstruct the input router to ensure that it has fresh state for a new
1231   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1232   // event. (In particular, the above call to view_->RenderProcessGone will
1233   // destroy the aura window, which may dispatch a synthetic mouse move.)
1234   input_router_.reset(new InputRouterImpl(
1235       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1236
1237   synthetic_gesture_controller_.reset();
1238 }
1239
1240 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1241   text_direction_updated_ = true;
1242   text_direction_ = direction;
1243 }
1244
1245 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1246   if (text_direction_updated_)
1247     text_direction_canceled_ = true;
1248 }
1249
1250 void RenderWidgetHostImpl::NotifyTextDirection() {
1251   if (text_direction_updated_) {
1252     if (!text_direction_canceled_)
1253       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1254     text_direction_updated_ = false;
1255     text_direction_canceled_ = false;
1256   }
1257 }
1258
1259 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1260   input_method_active_ = activate;
1261   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1262 }
1263
1264 void RenderWidgetHostImpl::CandidateWindowShown() {
1265   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1266 }
1267
1268 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1269   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1270 }
1271
1272 void RenderWidgetHostImpl::CandidateWindowHidden() {
1273   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1274 }
1275
1276 void RenderWidgetHostImpl::ImeSetComposition(
1277     const base::string16& text,
1278     const std::vector<blink::WebCompositionUnderline>& underlines,
1279     int selection_start,
1280     int selection_end) {
1281   Send(new InputMsg_ImeSetComposition(
1282             GetRoutingID(), text, underlines, selection_start, selection_end));
1283 }
1284
1285 void RenderWidgetHostImpl::ImeConfirmComposition(
1286     const base::string16& text,
1287     const gfx::Range& replacement_range,
1288     bool keep_selection) {
1289   Send(new InputMsg_ImeConfirmComposition(
1290         GetRoutingID(), text, replacement_range, keep_selection));
1291 }
1292
1293 void RenderWidgetHostImpl::ImeCancelComposition() {
1294   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1295             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1296 }
1297
1298 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1299   return gfx::Rect();
1300 }
1301
1302 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1303                                               bool last_unlocked_by_target) {
1304   // Directly reject to lock the mouse. Subclass can override this method to
1305   // decide whether to allow mouse lock or not.
1306   GotResponseToLockMouseRequest(false);
1307 }
1308
1309 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1310   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1311   if (pending_mouse_lock_request_) {
1312     pending_mouse_lock_request_ = false;
1313     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1314   } else if (IsMouseLocked()) {
1315     view_->UnlockMouse();
1316   }
1317 }
1318
1319 bool RenderWidgetHostImpl::IsMouseLocked() const {
1320   return view_ ? view_->IsMouseLocked() : false;
1321 }
1322
1323 bool RenderWidgetHostImpl::IsFullscreen() const {
1324   return false;
1325 }
1326
1327 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1328                                          const gfx::Size& min_size,
1329                                          const gfx::Size& max_size) {
1330   auto_resize_enabled_ = enable;
1331   min_size_for_auto_resize_ = min_size;
1332   max_size_for_auto_resize_ = max_size;
1333 }
1334
1335 void RenderWidgetHostImpl::Cleanup() {
1336   if (view_) {
1337     view_->Destroy();
1338     view_ = nullptr;
1339   }
1340 }
1341
1342 void RenderWidgetHostImpl::Destroy() {
1343   NotificationService::current()->Notify(
1344       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1345       Source<RenderWidgetHost>(this),
1346       NotificationService::NoDetails());
1347
1348   // Tell the view to die.
1349   // Note that in the process of the view shutting down, it can call a ton
1350   // of other messages on us.  So if you do any other deinitialization here,
1351   // do it after this call to view_->Destroy().
1352   if (view_) {
1353     view_->Destroy();
1354     view_ = nullptr;
1355   }
1356
1357   delete this;
1358 }
1359
1360 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1361   NotificationService::current()->Notify(
1362       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1363       Source<RenderWidgetHost>(this),
1364       NotificationService::NoDetails());
1365   is_unresponsive_ = true;
1366   NotifyRendererUnresponsive();
1367 }
1368
1369 void RenderWidgetHostImpl::RendererIsResponsive() {
1370   if (is_unresponsive_) {
1371     is_unresponsive_ = false;
1372     NotifyRendererResponsive();
1373   }
1374 }
1375
1376 void RenderWidgetHostImpl::OnRenderViewReady() {
1377   SendScreenRects();
1378   WasResized();
1379 }
1380
1381 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1382   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1383   // it handles destruction.
1384   if (!owned_by_render_frame_host_) {
1385     // TODO(evanm): This synchronously ends up calling "delete this".
1386     // Is that really what we want in response to this message?  I'm matching
1387     // previous behavior of the code here.
1388     Destroy();
1389   } else {
1390     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1391   }
1392 }
1393
1394 void RenderWidgetHostImpl::OnClose() {
1395   Shutdown();
1396 }
1397
1398 void RenderWidgetHostImpl::OnSetTooltipText(
1399     const base::string16& tooltip_text,
1400     WebTextDirection text_direction_hint) {
1401   // First, add directionality marks around tooltip text if necessary.
1402   // A naive solution would be to simply always wrap the text. However, on
1403   // windows, Unicode directional embedding characters can't be displayed on
1404   // systems that lack RTL fonts and are instead displayed as empty squares.
1405   //
1406   // To get around this we only wrap the string when we deem it necessary i.e.
1407   // when the locale direction is different than the tooltip direction hint.
1408   //
1409   // Currently, we use element's directionality as the tooltip direction hint.
1410   // An alternate solution would be to set the overall directionality based on
1411   // trying to detect the directionality from the tooltip text rather than the
1412   // element direction.  One could argue that would be a preferable solution
1413   // but we use the current approach to match Fx & IE's behavior.
1414   base::string16 wrapped_tooltip_text = tooltip_text;
1415   if (!tooltip_text.empty()) {
1416     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1417       // Force the tooltip to have LTR directionality.
1418       wrapped_tooltip_text =
1419           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1420     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1421                !base::i18n::IsRTL()) {
1422       // Force the tooltip to have RTL directionality.
1423       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1424     }
1425   }
1426   if (GetView())
1427     view_->SetTooltipText(wrapped_tooltip_text);
1428 }
1429
1430 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1431   waiting_for_screen_rects_ack_ = false;
1432   if (!view_)
1433     return;
1434
1435   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1436       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1437     return;
1438   }
1439
1440   SendScreenRects();
1441 }
1442
1443 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1444   if (view_) {
1445     view_->SetBounds(pos);
1446     Send(new ViewMsg_Move_ACK(routing_id_));
1447   }
1448 }
1449
1450 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1451     const IPC::Message& message) {
1452   // This trace event is used in
1453   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1454   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1455   ViewHostMsg_SwapCompositorFrame::Param param;
1456   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1457     return false;
1458   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1459   uint32 output_surface_id = get<0>(param);
1460   get<1>(param).AssignTo(frame.get());
1461   std::vector<IPC::Message> messages_to_deliver_with_frame;
1462   messages_to_deliver_with_frame.swap(get<2>(param));
1463
1464   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1465
1466   input_router_->OnViewUpdated(
1467       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1468
1469   if (touch_emulator_) {
1470     touch_emulator_->SetDoubleTapSupportForPageEnabled(
1471         !IsMobileOptimizedFrame(frame->metadata));
1472   }
1473
1474   if (view_) {
1475     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1476     view_->DidReceiveRendererFrame();
1477   } else {
1478     cc::CompositorFrameAck ack;
1479     if (frame->gl_frame_data) {
1480       ack.gl_frame_data = frame->gl_frame_data.Pass();
1481       ack.gl_frame_data->sync_point = 0;
1482     } else if (frame->delegated_frame_data) {
1483       cc::TransferableResource::ReturnResources(
1484           frame->delegated_frame_data->resource_list,
1485           &ack.resources);
1486     } else if (frame->software_frame_data) {
1487       ack.last_software_frame_id = frame->software_frame_data->id;
1488     }
1489     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1490                                process_->GetID(), ack);
1491   }
1492
1493   RenderProcessHost* rph = GetProcess();
1494   for (std::vector<IPC::Message>::const_iterator i =
1495            messages_to_deliver_with_frame.begin();
1496        i != messages_to_deliver_with_frame.end();
1497        ++i) {
1498     rph->OnMessageReceived(*i);
1499     if (i->dispatch_error())
1500       rph->OnBadMessageReceived(*i);
1501   }
1502   messages_to_deliver_with_frame.clear();
1503
1504   return true;
1505 }
1506
1507 void RenderWidgetHostImpl::OnUpdateRect(
1508     const ViewHostMsg_UpdateRect_Params& params) {
1509   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1510   TimeTicks paint_start = TimeTicks::Now();
1511
1512   // Update our knowledge of the RenderWidget's size.
1513   current_size_ = params.view_size;
1514
1515   bool is_resize_ack =
1516       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1517
1518   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1519   // that will end up reaching GetBackingStore.
1520   if (is_resize_ack) {
1521     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1522     resize_ack_pending_ = false;
1523   }
1524
1525   bool is_repaint_ack =
1526       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1527   if (is_repaint_ack) {
1528     DCHECK(repaint_ack_pending_);
1529     TRACE_EVENT_ASYNC_END0(
1530         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1531     repaint_ack_pending_ = false;
1532     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1533     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1534   }
1535
1536   DCHECK(!params.view_size.IsEmpty());
1537
1538   DidUpdateBackingStore(params, paint_start);
1539
1540   if (auto_resize_enabled_) {
1541     bool post_callback = new_auto_size_.IsEmpty();
1542     new_auto_size_ = params.view_size;
1543     if (post_callback) {
1544       base::MessageLoop::current()->PostTask(
1545           FROM_HERE,
1546           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1547                      weak_factory_.GetWeakPtr()));
1548     }
1549   }
1550
1551   // Log the time delta for processing a paint message. On platforms that don't
1552   // support asynchronous painting, this is equivalent to
1553   // MPArch.RWH_TotalPaintTime.
1554   TimeDelta delta = TimeTicks::Now() - paint_start;
1555   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1556 }
1557
1558 void RenderWidgetHostImpl::DidUpdateBackingStore(
1559     const ViewHostMsg_UpdateRect_Params& params,
1560     const TimeTicks& paint_start) {
1561   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1562   TimeTicks update_start = TimeTicks::Now();
1563
1564   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1565   // will not be re-issued, so must move them now, regardless of whether we
1566   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1567   // in the process could dispatch other window messages which could cause the
1568   // view to be destroyed.
1569   if (view_)
1570     view_->MovePluginWindows(params.plugin_window_moves);
1571
1572   NotificationService::current()->Notify(
1573       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1574       Source<RenderWidgetHost>(this),
1575       NotificationService::NoDetails());
1576
1577   // We don't need to update the view if the view is hidden. We must do this
1578   // early return after the ACK is sent, however, or the renderer will not send
1579   // us more data.
1580   if (is_hidden_)
1581     return;
1582
1583   // If we got a resize ack, then perhaps we have another resize to send?
1584   bool is_resize_ack =
1585       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1586   if (is_resize_ack)
1587     WasResized();
1588
1589   // Log the time delta for processing a paint message.
1590   TimeTicks now = TimeTicks::Now();
1591   TimeDelta delta = now - update_start;
1592   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1593 }
1594
1595 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1596     const SyntheticGesturePacket& gesture_packet) {
1597   // Only allow untrustworthy gestures if explicitly enabled.
1598   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1599           cc::switches::kEnableGpuBenchmarking)) {
1600     bad_message::ReceivedBadMessage(GetProcess(),
1601                                     bad_message::RWH_SYNTHETIC_GESTURE);
1602     return;
1603   }
1604
1605   QueueSyntheticGesture(
1606         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1607         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1608                    weak_factory_.GetWeakPtr()));
1609 }
1610
1611 void RenderWidgetHostImpl::OnFocus() {
1612   // Only RenderViewHost can deal with that message.
1613   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1614 }
1615
1616 void RenderWidgetHostImpl::OnBlur() {
1617   // Only RenderViewHost can deal with that message.
1618   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1619 }
1620
1621 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1622   SetCursor(cursor);
1623 }
1624
1625 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1626     bool enabled, ui::GestureProviderConfigType config_type) {
1627   if (enabled) {
1628     if (!touch_emulator_)
1629       touch_emulator_.reset(new TouchEmulator(this));
1630     touch_emulator_->Enable(config_type);
1631   } else {
1632     if (touch_emulator_)
1633       touch_emulator_->Disable();
1634   }
1635 }
1636
1637 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1638     ui::TextInputType type,
1639     ui::TextInputMode input_mode,
1640     bool can_compose_inline,
1641     int flags) {
1642   if (view_)
1643     view_->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
1644 }
1645
1646 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1647     const gfx::Range& range,
1648     const std::vector<gfx::Rect>& character_bounds) {
1649   if (view_)
1650     view_->ImeCompositionRangeChanged(range, character_bounds);
1651 }
1652
1653 void RenderWidgetHostImpl::OnImeCancelComposition() {
1654   if (view_)
1655     view_->ImeCancelComposition();
1656 }
1657
1658 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1659                                        bool last_unlocked_by_target,
1660                                        bool privileged) {
1661
1662   if (pending_mouse_lock_request_) {
1663     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1664     return;
1665   } else if (IsMouseLocked()) {
1666     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1667     return;
1668   }
1669
1670   pending_mouse_lock_request_ = true;
1671   if (privileged && allow_privileged_mouse_lock_) {
1672     // Directly approve to lock the mouse.
1673     GotResponseToLockMouseRequest(true);
1674   } else {
1675     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1676   }
1677 }
1678
1679 void RenderWidgetHostImpl::OnUnlockMouse() {
1680   RejectMouseLockOrUnlockIfNecessary();
1681 }
1682
1683 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1684     const gfx::Rect& rect_pixels,
1685     const gfx::Size& size,
1686     const cc::SharedBitmapId& id) {
1687   DCHECK(!rect_pixels.IsEmpty());
1688   DCHECK(!size.IsEmpty());
1689
1690   scoped_ptr<cc::SharedBitmap> bitmap =
1691       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1692   if (!bitmap) {
1693     bad_message::ReceivedBadMessage(GetProcess(),
1694                                     bad_message::RWH_SHARED_BITMAP);
1695     return;
1696   }
1697
1698   DCHECK(bitmap->pixels());
1699
1700   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1701   SkBitmap zoomed_bitmap;
1702   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1703
1704   // Note that |rect| is in coordinates of pixels relative to the window origin.
1705   // Aura-based systems will want to convert this to DIPs.
1706   if (view_)
1707     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1708
1709   // It is assumed that the disambiguation popup will make a copy of the
1710   // provided zoomed image, so we delete this one.
1711   zoomed_bitmap.setPixels(0);
1712   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1713 }
1714
1715 #if defined(OS_WIN)
1716 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1717     gfx::NativeViewId dummy_activation_window) {
1718   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1719
1720   // This may happen as a result of a race condition when the plugin is going
1721   // away.
1722   wchar_t window_title[MAX_PATH + 1] = {0};
1723   if (!IsWindow(hwnd) ||
1724       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1725       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1726     return;
1727   }
1728
1729 #if defined(USE_AURA)
1730   SetParent(hwnd,
1731             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1732 #else
1733   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1734 #endif
1735   dummy_windows_for_activation_.push_back(hwnd);
1736 }
1737
1738 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1739     gfx::NativeViewId dummy_activation_window) {
1740   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1741   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1742   for (; i != dummy_windows_for_activation_.end(); ++i) {
1743     if ((*i) == hwnd) {
1744       dummy_windows_for_activation_.erase(i);
1745       return;
1746     }
1747   }
1748   NOTREACHED() << "Unknown dummy window";
1749 }
1750 #endif
1751
1752 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1753   ignore_input_events_ = ignore_input_events;
1754 }
1755
1756 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1757     const NativeWebKeyboardEvent& event) {
1758   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1759     return false;
1760
1761   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1762     size_t original_size = key_press_event_callbacks_.size();
1763     if (key_press_event_callbacks_[i].Run(event))
1764       return true;
1765
1766     // Check whether the callback that just ran removed itself, in which case
1767     // the iterator needs to be decremented to properly account for the removal.
1768     size_t current_size = key_press_event_callbacks_.size();
1769     if (current_size != original_size) {
1770       DCHECK_EQ(original_size - 1, current_size);
1771       --i;
1772     }
1773   }
1774
1775   return false;
1776 }
1777
1778 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1779     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1780   // Don't ignore touch cancel events, since they may be sent while input
1781   // events are being ignored in order to keep the renderer from getting
1782   // confused about how many touches are active.
1783   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1784     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1785
1786   if (!process_->HasConnection())
1787     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1788
1789   if (event.type == WebInputEvent::MouseDown)
1790     OnUserGesture();
1791
1792   return view_ ? view_->FilterInputEvent(event)
1793                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1794 }
1795
1796 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1797   increment_in_flight_event_count();
1798   if (!is_hidden_)
1799     StartHangMonitorTimeout(hung_renderer_delay_);
1800 }
1801
1802 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1803   if (decrement_in_flight_event_count() <= 0) {
1804     // Cancel pending hung renderer checks since the renderer is responsive.
1805     StopHangMonitorTimeout();
1806   } else {
1807     // The renderer is responsive, but there are in-flight events to wait for.
1808     if (!is_hidden_)
1809       RestartHangMonitorTimeout();
1810   }
1811 }
1812
1813 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1814   has_touch_handler_ = has_handlers;
1815 }
1816
1817 void RenderWidgetHostImpl::DidFlush() {
1818   if (synthetic_gesture_controller_)
1819     synthetic_gesture_controller_->OnDidFlushInput();
1820 }
1821
1822 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1823   if (view_)
1824     view_->DidOverscroll(params);
1825 }
1826
1827 void RenderWidgetHostImpl::DidStopFlinging() {
1828   if (view_)
1829     view_->DidStopFlinging();
1830 }
1831
1832 void RenderWidgetHostImpl::OnKeyboardEventAck(
1833       const NativeWebKeyboardEvent& event,
1834       InputEventAckState ack_result) {
1835 #if defined(OS_MACOSX)
1836   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1837     return;
1838 #endif
1839
1840   // We only send unprocessed key event upwards if we are not hidden,
1841   // because the user has moved away from us and no longer expect any effect
1842   // of this key event.
1843   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1844   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1845     delegate_->HandleKeyboardEvent(event);
1846
1847     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1848     // (i.e.  in the case of Ctrl+W, where the call to
1849     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1850   }
1851 }
1852
1853 void RenderWidgetHostImpl::OnWheelEventAck(
1854     const MouseWheelEventWithLatencyInfo& wheel_event,
1855     InputEventAckState ack_result) {
1856   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1857
1858   if (!is_hidden() && view_) {
1859     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1860         delegate_->HandleWheelEvent(wheel_event.event)) {
1861       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1862     }
1863     view_->WheelEventAck(wheel_event.event, ack_result);
1864   }
1865 }
1866
1867 void RenderWidgetHostImpl::OnGestureEventAck(
1868     const GestureEventWithLatencyInfo& event,
1869     InputEventAckState ack_result) {
1870   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1871
1872   if (view_)
1873     view_->GestureEventAck(event.event, ack_result);
1874 }
1875
1876 void RenderWidgetHostImpl::OnTouchEventAck(
1877     const TouchEventWithLatencyInfo& event,
1878     InputEventAckState ack_result) {
1879   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1880
1881   if (touch_emulator_ &&
1882       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1883     return;
1884   }
1885
1886   if (view_)
1887     view_->ProcessAckedTouchEvent(event, ack_result);
1888 }
1889
1890 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1891   if (type == BAD_ACK_MESSAGE) {
1892     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1893   } else if (type == UNEXPECTED_EVENT_TYPE) {
1894     suppress_next_char_events_ = false;
1895   }
1896 }
1897
1898 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1899     SyntheticGesture::Result result) {
1900   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1901 }
1902
1903 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1904   return ignore_input_events_ || process_->IgnoreInputEvents();
1905 }
1906
1907 void RenderWidgetHostImpl::StartUserGesture() {
1908   OnUserGesture();
1909 }
1910
1911 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1912   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1913 }
1914
1915 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1916     const std::vector<EditCommand>& commands) {
1917   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1918 }
1919
1920 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1921                                               const std::string& value) {
1922   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1923 }
1924
1925 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1926     const gfx::Rect& rect) {
1927   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1928 }
1929
1930 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1931   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1932 }
1933
1934 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1935   if (!allowed) {
1936     RejectMouseLockOrUnlockIfNecessary();
1937     return false;
1938   } else {
1939     if (!pending_mouse_lock_request_) {
1940       // This is possible, e.g., the plugin sends us an unlock request before
1941       // the user allows to lock to mouse.
1942       return false;
1943     }
1944
1945     pending_mouse_lock_request_ = false;
1946     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1947       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1948       return false;
1949     } else {
1950       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1951       return true;
1952     }
1953   }
1954 }
1955
1956 // static
1957 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1958     int32 route_id,
1959     uint32 output_surface_id,
1960     int renderer_host_id,
1961     const cc::CompositorFrameAck& ack) {
1962   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1963   if (!host)
1964     return;
1965   host->Send(new ViewMsg_SwapCompositorFrameAck(
1966       route_id, output_surface_id, ack));
1967 }
1968
1969 // static
1970 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1971     int32 route_id,
1972     uint32 output_surface_id,
1973     int renderer_host_id,
1974     const cc::CompositorFrameAck& ack) {
1975   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1976   if (!host)
1977     return;
1978   host->Send(
1979       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1980 }
1981
1982 void RenderWidgetHostImpl::DelayedAutoResized() {
1983   gfx::Size new_size = new_auto_size_;
1984   // Clear the new_auto_size_ since the empty value is used as a flag to
1985   // indicate that no callback is in progress (i.e. without this line
1986   // DelayedAutoResized will not get called again).
1987   new_auto_size_.SetSize(0, 0);
1988   if (!auto_resize_enabled_)
1989     return;
1990
1991   OnRenderAutoResized(new_size);
1992 }
1993
1994 void RenderWidgetHostImpl::DetachDelegate() {
1995   delegate_ = NULL;
1996 }
1997
1998 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
1999   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2000   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2001                                GetLatencyComponentId(),
2002                                &window_snapshot_component)) {
2003     int sequence_number = static_cast<int>(
2004         window_snapshot_component.sequence_number);
2005 #if defined(OS_MACOSX)
2006     // On Mac, when using CoreAnmation, there is a delay between when content
2007     // is drawn to the screen, and when the snapshot will actually pick up
2008     // that content. Insert a manual delay of 1/6th of a second (to simulate
2009     // 10 frames at 60 fps) before actually taking the snapshot.
2010     base::MessageLoop::current()->PostDelayedTask(
2011         FROM_HERE,
2012         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2013                    weak_factory_.GetWeakPtr(),
2014                    sequence_number),
2015         base::TimeDelta::FromSecondsD(1. / 6));
2016 #else
2017     WindowSnapshotReachedScreen(sequence_number);
2018 #endif
2019   }
2020
2021   latency_tracker_.OnFrameSwapped(latency_info);
2022 }
2023
2024 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2025   view_->DidReceiveRendererFrame();
2026 }
2027
2028 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2029   DCHECK(base::MessageLoopForUI::IsCurrent());
2030
2031   gfx::Rect view_bounds = GetView()->GetViewBounds();
2032   gfx::Rect snapshot_bounds(view_bounds.size());
2033
2034   std::vector<unsigned char> png;
2035   if (ui::GrabViewSnapshot(
2036       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2037     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2038     return;
2039   }
2040
2041   ui::GrabViewSnapshotAsync(
2042       GetView()->GetNativeView(),
2043       snapshot_bounds,
2044       base::ThreadTaskRunnerHandle::Get(),
2045       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2046                  weak_factory_.GetWeakPtr(),
2047                  snapshot_id));
2048 }
2049
2050 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2051                                                   const unsigned char* data,
2052                                                   size_t size) {
2053   // Any pending snapshots with a lower ID than the one received are considered
2054   // to be implicitly complete, and returned the same snapshot data.
2055   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2056   while(it != pending_browser_snapshots_.end()) {
2057       if (it->first <= snapshot_id) {
2058         it->second.Run(data, size);
2059         pending_browser_snapshots_.erase(it++);
2060       } else {
2061         ++it;
2062       }
2063   }
2064 }
2065
2066 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2067     int snapshot_id,
2068     scoped_refptr<base::RefCountedBytes> png_data) {
2069   if (png_data.get())
2070     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2071   else
2072     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2073 }
2074
2075 // static
2076 void RenderWidgetHostImpl::CompositorFrameDrawn(
2077     const std::vector<ui::LatencyInfo>& latency_info) {
2078   for (size_t i = 0; i < latency_info.size(); i++) {
2079     std::set<RenderWidgetHostImpl*> rwhi_set;
2080     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2081              latency_info[i].latency_components.begin();
2082          b != latency_info[i].latency_components.end();
2083          ++b) {
2084       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2085           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2086           b->first.first == ui::TAB_SHOW_COMPONENT) {
2087         // Matches with GetLatencyComponentId
2088         int routing_id = b->first.second & 0xffffffff;
2089         int process_id = (b->first.second >> 32) & 0xffffffff;
2090         RenderWidgetHost* rwh =
2091             RenderWidgetHost::FromID(process_id, routing_id);
2092         if (!rwh) {
2093           continue;
2094         }
2095         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2096         if (rwhi_set.insert(rwhi).second)
2097           rwhi->FrameSwapped(latency_info[i]);
2098       }
2099     }
2100   }
2101 }
2102
2103 BrowserAccessibilityManager*
2104     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2105   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2106 }
2107
2108 BrowserAccessibilityManager*
2109     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2110   return delegate_ ?
2111       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2112 }
2113
2114 base::TimeDelta RenderWidgetHostImpl::GetEstimatedBrowserCompositeTime() const {
2115   return latency_tracker_.GetEstimatedBrowserCompositeTime();
2116 }
2117
2118 #if defined(OS_WIN)
2119 gfx::NativeViewAccessible
2120     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2121   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2122 }
2123 #endif
2124
2125 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
2126   if (view_)
2127     return view_->PreferredReadbackFormat();
2128   return kN32_SkColorType;
2129 }
2130
2131 }  // namespace content