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       hung_renderer_delay_(
 163           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs)),
 164       renderer_initialized_(false),
 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       auto_resize_enabled_(false),
 174       waiting_for_screen_rects_ack_(false),
 175       needs_repainting_on_restore_(false),
 176       is_unresponsive_(false),
 177       in_flight_event_count_(0),
 178       in_get_backing_store_(false),
 179       ignore_input_events_(false),
 180       input_method_active_(false),
 181       text_direction_updated_(false),
 182       text_direction_(blink::WebTextDirectionLeftToRight),
 183       text_direction_canceled_(false),
 184       suppress_next_char_events_(false),
 185       pending_mouse_lock_request_(false),
 186       allow_privileged_mouse_lock_(false),
 187       has_touch_handler_(false),
 188       next_browser_snapshot_id_(1),
 189       owned_by_render_frame_host_(false),
 190       is_focused_(false),
 191       weak_factory_(this) {
 192   CHECK(delegate_);
 193   if (routing_id_ == MSG_ROUTING_NONE) {
 194     routing_id_ = process_->GetNextRoutingID();
 195     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 196         process_->GetID(),
 197         routing_id_);
 198   } else {
 199     // TODO(piman): This is a O(N) lookup, where we could forward the
 200     // information from the RenderWidgetHelper. The problem is that doing so
 201     // currently leaks outside of content all the way to chrome classes, and
 202     // would be a layering violation. Since we don't expect more than a few
 203     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 204     // problem, for example by tracking in the RenderWidgetHelper the routing id
 205     // (and surface id) that have been created, but whose RWH haven't yet.
 206     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 207         process_->GetID(),
 208         routing_id_);
 209     DCHECK(surface_id_);
 210   }
 211
 212   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 213       g_routing_id_widget_map.Get().insert(std::make_pair(
 214           RenderWidgetHostID(process->GetID(), routing_id_), this));
 215   CHECK(result.second) << "Inserting a duplicate item!";
 216   process_->AddRoute(routing_id_, this);
 217
 218   // If we're initially visible, tell the process host that we're alive.
 219   // Otherwise we'll notify the process host when we are first shown.
 220   if (!hidden)
 221     process_->WidgetRestored();
 222
 223   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 224
 225   input_router_.reset(new InputRouterImpl(
 226       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 227
 228   touch_emulator_.reset();
 229
 230   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 231       IsRenderView() ? RenderViewHost::From(this) : NULL);
 232   if (BrowserPluginGuest::IsGuest(rvh) ||
 233       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 234           switches::kDisableHangMonitor)) {
 235     hang_monitor_timeout_.reset(new TimeoutMonitor(
 236         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 237                    weak_factory_.GetWeakPtr())));
 238   }
 239 }
 240
 241 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 242   if (view_weak_)
 243     view_weak_->RenderWidgetHostGone();
 244   SetView(NULL);
 245
 246   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 247   surface_id_ = 0;
 248
 249   process_->RemoveRoute(routing_id_);
 250   g_routing_id_widget_map.Get().erase(
 251       RenderWidgetHostID(process_->GetID(), routing_id_));
 252
 253   if (delegate_)
 254     delegate_->RenderWidgetDeleted(this);
 255 }
 256
 257 // static
 258 RenderWidgetHost* RenderWidgetHost::FromID(
 259     int32 process_id,
 260     int32 routing_id) {
 261   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 262 }
 263
 264 // static
 265 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 266     int32 process_id,
 267     int32 routing_id) {
 268   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 269   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 270   RoutingIDWidgetMap::iterator it = widgets->find(
 271       RenderWidgetHostID(process_id, routing_id));
 272   return it == widgets->end() ? NULL : it->second;
 273 }
 274
 275 // static
 276 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 277   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 278   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 279   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 280        it != widgets->end();
 281        ++it) {
 282     RenderWidgetHost* widget = it->second;
 283
 284     if (!widget->IsRenderView()) {
 285       hosts->Add(widget);
 286       continue;
 287     }
 288
 289     // Add only active RenderViewHosts.
 290     RenderViewHost* rvh = RenderViewHost::From(widget);
 291     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 292       hosts->Add(widget);
 293   }
 294
 295   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 296 }
 297
 298 // static
 299 scoped_ptr<RenderWidgetHostIterator>
 300 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 301   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 302   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 303   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 304        it != widgets->end();
 305        ++it) {
 306     hosts->Add(it->second);
 307   }
 308
 309   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 310 }
 311
 312 // static
 313 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 314   return rwh->AsRenderWidgetHostImpl();
 315 }
 316
 317 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 318   if (view)
 319     view_weak_ = view->GetWeakPtr();
 320   else
 321     view_weak_.reset();
 322   view_ = view;
 323
 324   // If the renderer has not yet been initialized, then the surface ID
 325   // namespace will be sent during initialization.
 326   if (view_ && renderer_initialized_) {
 327     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 328                                            view_->GetSurfaceIdNamespace()));
 329   }
 330
 331   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 332       surface_id_, GetCompositingSurface());
 333
 334   synthetic_gesture_controller_.reset();
 335 }
 336
 337 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 338   return process_;
 339 }
 340
 341 int RenderWidgetHostImpl::GetRoutingID() const {
 342   return routing_id_;
 343 }
 344
 345 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 346   return view_;
 347 }
 348
 349 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 350   return this;
 351 }
 352
 353 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 354   if (view_)
 355     return view_->GetNativeViewId();
 356   return 0;
 357 }
 358
 359 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 360   if (view_)
 361     return view_->GetCompositingSurface();
 362   return gfx::GLSurfaceHandle();
 363 }
 364
 365 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 366   resize_ack_pending_ = false;
 367   if (repaint_ack_pending_) {
 368     TRACE_EVENT_ASYNC_END0(
 369         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 370   }
 371   repaint_ack_pending_ = false;
 372   if (old_resize_params_)
 373     old_resize_params_->new_size = gfx::Size();
 374 }
 375
 376 void RenderWidgetHostImpl::SendScreenRects() {
 377   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 378     return;
 379
 380   if (is_hidden_) {
 381     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 382     // happens on Win & Mac, and when the view is shown it'll call this again.
 383     return;
 384   }
 385
 386   if (!view_)
 387     return;
 388
 389   last_view_screen_rect_ = view_->GetViewBounds();
 390   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 391   Send(new ViewMsg_UpdateScreenRects(
 392       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 393   if (delegate_)
 394     delegate_->DidSendScreenRects(this);
 395   waiting_for_screen_rects_ack_ = true;
 396 }
 397
 398 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 399   suppress_next_char_events_ = true;
 400 }
 401
 402 void RenderWidgetHostImpl::FlushInput() {
 403   input_router_->RequestNotificationWhenFlushed();
 404   if (synthetic_gesture_controller_)
 405     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 406 }
 407
 408 void RenderWidgetHostImpl::SetNeedsFlush() {
 409   if (view_)
 410     view_->OnSetNeedsFlushInput();
 411 }
 412
 413 void RenderWidgetHostImpl::Init() {
 414   DCHECK(process_->HasConnection());
 415
 416   renderer_initialized_ = true;
 417
 418   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 419       surface_id_, GetCompositingSurface());
 420
 421   // Send the ack along with the information on placement.
 422   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 423   GetProcess()->ResumeRequestsForView(routing_id_);
 424
 425   // If the RWHV has not yet been set, the surface ID namespace will get
 426   // passed down by the call to SetView().
 427   if (view_) {
 428     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 429                                            view_->GetSurfaceIdNamespace()));
 430   }
 431
 432   WasResized();
 433 }
 434
 435 void RenderWidgetHostImpl::InitForFrame() {
 436   DCHECK(process_->HasConnection());
 437   renderer_initialized_ = true;
 438 }
 439
 440 void RenderWidgetHostImpl::Shutdown() {
 441   RejectMouseLockOrUnlockIfNecessary();
 442
 443   if (process_->HasConnection()) {
 444     // Tell the renderer object to close.
 445     bool rv = Send(new ViewMsg_Close(routing_id_));
 446     DCHECK(rv);
 447   }
 448
 449   Destroy();
 450 }
 451
 452 bool RenderWidgetHostImpl::IsLoading() const {
 453   return is_loading_;
 454 }
 455
 456 bool RenderWidgetHostImpl::IsRenderView() const {
 457   return false;
 458 }
 459
 460 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 461   bool handled = true;
 462   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 463     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 464     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 465                         OnQueueSyntheticGesture)
 466     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 467                         OnImeCancelComposition)
 468     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 469     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 471                         OnUpdateScreenRectsAck)
 472     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 473     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 474     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 475                                 OnSwapCompositorFrame(msg))
 476     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 477     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 478     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 479     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 480     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
 481                         OnTextInputTypeChanged)
 482     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 483     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 484     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 485                         OnShowDisambiguationPopup)
 486     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 487     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 488                         OnSelectionBoundsChanged)
 489 #if defined(OS_WIN)
 490     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 491                         OnWindowlessPluginDummyWindowCreated)
 492     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 493                         OnWindowlessPluginDummyWindowDestroyed)
 494 #endif
 495     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 496                         OnImeCompositionRangeChanged)
 497     IPC_MESSAGE_UNHANDLED(handled = false)
 498   IPC_END_MESSAGE_MAP()
 499
 500   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 501     return true;
 502
 503   if (!handled && view_ && view_->OnMessageReceived(msg))
 504     return true;
 505
 506   return handled;
 507 }
 508
 509 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 510   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 511     return input_router_->SendInput(make_scoped_ptr(msg));
 512
 513   return process_->Send(msg);
 514 }
 515
 516 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 517   is_loading_ = is_loading;
 518   if (!view_)
 519     return;
 520   view_->SetIsLoading(is_loading);
 521 }
 522
 523 void RenderWidgetHostImpl::WasHidden() {
 524   if (is_hidden_)
 525     return;
 526
 527   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
 528   is_hidden_ = true;
 529
 530   // Don't bother reporting hung state when we aren't active.
 531   StopHangMonitorTimeout();
 532
 533   // If we have a renderer, then inform it that we are being hidden so it can
 534   // reduce its resource utilization.
 535   Send(new ViewMsg_WasHidden(routing_id_));
 536
 537   // Tell the RenderProcessHost we were hidden.
 538   process_->WidgetHidden();
 539
 540   bool is_visible = false;
 541   NotificationService::current()->Notify(
 542       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 543       Source<RenderWidgetHost>(this),
 544       Details<bool>(&is_visible));
 545 }
 546
 547 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 548   if (!is_hidden_)
 549     return;
 550
 551   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasShown");
 552   is_hidden_ = false;
 553
 554   SendScreenRects();
 555
 556   // When hidden, timeout monitoring for input events is disabled. Restore it
 557   // now to ensure consistent hang detection.
 558   if (in_flight_event_count_)
 559     RestartHangMonitorTimeout();
 560
 561   // Always repaint on restore.
 562   bool needs_repainting = true;
 563   needs_repainting_on_restore_ = false;
 564   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 565
 566   process_->WidgetRestored();
 567
 568   bool is_visible = true;
 569   NotificationService::current()->Notify(
 570       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 571       Source<RenderWidgetHost>(this),
 572       Details<bool>(&is_visible));
 573
 574   // It's possible for our size to be out of sync with the renderer. The
 575   // following is one case that leads to this:
 576   // 1. WasResized -> Send ViewMsg_Resize to render
 577   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 578   // 3. WasHidden
 579   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 580   //    is hidden. Now renderer/browser out of sync with what they think size
 581   //    is.
 582   // By invoking WasResized the renderer is updated as necessary. WasResized
 583   // does nothing if the sizes are already in sync.
 584   //
 585   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 586   // could handle both the restore and resize at once. This isn't that big a
 587   // deal as RenderWidget::WasShown delays updating, so that the resize from
 588   // WasResized is usually processed before the renderer is painted.
 589   WasResized();
 590 }
 591
 592 bool RenderWidgetHostImpl::GetResizeParams(
 593     ViewMsg_Resize_Params* resize_params) {
 594   *resize_params = ViewMsg_Resize_Params();
 595
 596   GetWebScreenInfo(&resize_params->screen_info);
 597   resize_params->resizer_rect = GetRootWindowResizerRect();
 598
 599   if (view_) {
 600     resize_params->new_size = view_->GetRequestedRendererSize();
 601     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 602     resize_params->top_controls_height = view_->GetTopControlsHeight();
 603     resize_params->top_controls_shrink_blink_size =
 604         view_->DoTopControlsShrinkBlinkSize();
 605     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 606     resize_params->is_fullscreen_granted = IsFullscreenGranted();
 607     resize_params->display_mode = GetDisplayMode();
 608   }
 609
 610   const bool size_changed =
 611       !old_resize_params_ ||
 612       old_resize_params_->new_size != resize_params->new_size ||
 613       (old_resize_params_->physical_backing_size.IsEmpty() &&
 614        !resize_params->physical_backing_size.IsEmpty());
 615   bool dirty = size_changed ||
 616       old_resize_params_->screen_info != resize_params->screen_info ||
 617       old_resize_params_->physical_backing_size !=
 618           resize_params->physical_backing_size ||
 619       old_resize_params_->is_fullscreen_granted !=
 620           resize_params->is_fullscreen_granted ||
 621       old_resize_params_->display_mode != resize_params->display_mode ||
 622       old_resize_params_->top_controls_height !=
 623           resize_params->top_controls_height ||
 624       old_resize_params_->top_controls_shrink_blink_size !=
 625           resize_params->top_controls_shrink_blink_size ||
 626       old_resize_params_->visible_viewport_size !=
 627           resize_params->visible_viewport_size;
 628
 629   // We don't expect to receive an ACK when the requested size or the physical
 630   // backing size is empty, or when the main viewport size didn't change.
 631   resize_params->needs_resize_ack =
 632       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 633       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 634
 635   return dirty;
 636 }
 637
 638 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 639     const ViewMsg_Resize_Params& resize_params) {
 640   resize_ack_pending_ = resize_params.needs_resize_ack;
 641
 642   old_resize_params_ =
 643       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 644 }
 645
 646 void RenderWidgetHostImpl::WasResized() {
 647   // Skip if the |delegate_| has already been detached because
 648   // it's web contents is being deleted.
 649   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 650       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 651     return;
 652   }
 653
 654   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 655   if (!GetResizeParams(params.get()))
 656     return;
 657
 658   bool width_changed =
 659       !old_resize_params_ ||
 660       old_resize_params_->new_size.width() != params->new_size.width();
 661   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 662     resize_ack_pending_ = params->needs_resize_ack;
 663     old_resize_params_.swap(params);
 664   }
 665
 666   if (delegate_)
 667     delegate_->RenderWidgetWasResized(this, width_changed);
 668 }
 669
 670 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 671   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 672 }
 673
 674 void RenderWidgetHostImpl::GotFocus() {
 675   Focus();
 676   if (delegate_)
 677     delegate_->RenderWidgetGotFocus(this);
 678 }
 679
 680 void RenderWidgetHostImpl::Focus() {
 681   is_focused_ = true;
 682
 683   Send(new InputMsg_SetFocus(routing_id_, true));
 684 }
 685
 686 void RenderWidgetHostImpl::Blur() {
 687   is_focused_ = false;
 688
 689   // If there is a pending mouse lock request, we don't want to reject it at
 690   // this point. The user can switch focus back to this view and approve the
 691   // request later.
 692   if (IsMouseLocked())
 693     view_->UnlockMouse();
 694
 695   if (touch_emulator_)
 696     touch_emulator_->CancelTouch();
 697
 698   Send(new InputMsg_SetFocus(routing_id_, false));
 699 }
 700
 701 void RenderWidgetHostImpl::LostCapture() {
 702   if (touch_emulator_)
 703     touch_emulator_->CancelTouch();
 704
 705   Send(new InputMsg_MouseCaptureLost(routing_id_));
 706 }
 707
 708 void RenderWidgetHostImpl::SetActive(bool active) {
 709   Send(new ViewMsg_SetActive(routing_id_, active));
 710 }
 711
 712 void RenderWidgetHostImpl::LostMouseLock() {
 713   Send(new ViewMsg_MouseLockLost(routing_id_));
 714 }
 715
 716 void RenderWidgetHostImpl::ViewDestroyed() {
 717   RejectMouseLockOrUnlockIfNecessary();
 718
 719   // TODO(evanm): tracking this may no longer be necessary;
 720   // eliminate this function if so.
 721   SetView(NULL);
 722 }
 723
 724 void RenderWidgetHostImpl::CopyFromBackingStore(
 725     const gfx::Rect& src_subrect,
 726     const gfx::Size& accelerated_dst_size,
 727     ReadbackRequestCallback& callback,
 728     const SkColorType preferred_color_type) {
 729   if (view_) {
 730     TRACE_EVENT0("browser",
 731         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 732     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 733         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 734     view_->CopyFromCompositingSurface(accelerated_copy_rect,
 735                                       accelerated_dst_size, callback,
 736                                       preferred_color_type);
 737     return;
 738   }
 739
 740   callback.Run(SkBitmap(), content::READBACK_FAILED);
 741 }
 742
 743 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 744   if (view_)
 745     return view_->IsSurfaceAvailableForCopy();
 746   return false;
 747 }
 748
 749 #if defined(OS_ANDROID)
 750 void RenderWidgetHostImpl::LockBackingStore() {
 751   if (view_)
 752     view_->LockCompositingSurface();
 753 }
 754
 755 void RenderWidgetHostImpl::UnlockBackingStore() {
 756   if (view_)
 757     view_->UnlockCompositingSurface();
 758 }
 759 #endif
 760
 761 #if defined(OS_MACOSX)
 762 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 763   TRACE_EVENT0("browser",
 764       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 765
 766   if (!CanPauseForPendingResizeOrRepaints())
 767     return;
 768
 769   WaitForSurface();
 770 }
 771
 772 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 773   // Do not pause if the view is hidden.
 774   if (is_hidden())
 775     return false;
 776
 777   // Do not pause if there is not a paint or resize already coming.
 778   if (!repaint_ack_pending_ && !resize_ack_pending_)
 779     return false;
 780
 781   return true;
 782 }
 783
 784 void RenderWidgetHostImpl::WaitForSurface() {
 785   // How long to (synchronously) wait for the renderer to respond with a
 786   // new frame when our current frame doesn't exist or is the wrong size.
 787   // This timeout impacts the "choppiness" of our window resize.
 788   const int kPaintMsgTimeoutMS = 50;
 789
 790   if (!view_)
 791     return;
 792
 793   // The view_size will be current_size_ for auto-sized views and otherwise the
 794   // size of the view_. (For auto-sized views, current_size_ is updated during
 795   // UpdateRect messages.)
 796   gfx::Size view_size = current_size_;
 797   if (!auto_resize_enabled_) {
 798     // Get the desired size from the current view bounds.
 799     gfx::Rect view_rect = view_->GetViewBounds();
 800     if (view_rect.IsEmpty())
 801       return;
 802     view_size = view_rect.size();
 803   }
 804
 805   TRACE_EVENT2("renderer_host",
 806                "RenderWidgetHostImpl::WaitForSurface",
 807                "width",
 808                base::IntToString(view_size.width()),
 809                "height",
 810                base::IntToString(view_size.height()));
 811
 812   // We should not be asked to paint while we are hidden.  If we are hidden,
 813   // then it means that our consumer failed to call WasShown.
 814   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 815
 816   // We should never be called recursively; this can theoretically lead to
 817   // infinite recursion and almost certainly leads to lower performance.
 818   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 819   base::AutoReset<bool> auto_reset_in_get_backing_store(
 820       &in_get_backing_store_, true);
 821
 822   // We might have a surface that we can use already.
 823   if (view_->HasAcceleratedSurface(view_size))
 824     return;
 825
 826   // Request that the renderer produce a frame of the right size, if it
 827   // hasn't been requested already.
 828   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 829     repaint_start_time_ = TimeTicks::Now();
 830     repaint_ack_pending_ = true;
 831     TRACE_EVENT_ASYNC_BEGIN0(
 832         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 833     Send(new ViewMsg_Repaint(routing_id_, view_size));
 834   }
 835
 836   // Pump a nested message loop until we time out or get a frame of the right
 837   // size.
 838   TimeTicks start_time = TimeTicks::Now();
 839   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 840   TimeTicks timeout_time = start_time + time_left;
 841   while (1) {
 842     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 843     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 844       // For auto-resized views, current_size_ determines the view_size and it
 845       // may have changed during the handling of an UpdateRect message.
 846       if (auto_resize_enabled_)
 847         view_size = current_size_;
 848       if (view_->HasAcceleratedSurface(view_size))
 849         break;
 850     }
 851     time_left = timeout_time - TimeTicks::Now();
 852     if (time_left <= TimeDelta::FromSeconds(0)) {
 853       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 854       break;
 855     }
 856   }
 857
 858   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 859                              TimeTicks::Now() - start_time,
 860                              TimeDelta::FromMilliseconds(1),
 861                              TimeDelta::FromMilliseconds(200), 50);
 862 }
 863 #endif
 864
 865 bool RenderWidgetHostImpl::ScheduleComposite() {
 866   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 867       resize_ack_pending_) {
 868     return false;
 869   }
 870
 871   // Send out a request to the renderer to paint the view if required.
 872   repaint_start_time_ = TimeTicks::Now();
 873   repaint_ack_pending_ = true;
 874   TRACE_EVENT_ASYNC_BEGIN0(
 875       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 876   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 877   return true;
 878 }
 879
 880 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 881   if (hang_monitor_timeout_)
 882     hang_monitor_timeout_->Start(delay);
 883 }
 884
 885 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 886   if (hang_monitor_timeout_)
 887     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 888 }
 889
 890 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 891   if (hang_monitor_timeout_)
 892     hang_monitor_timeout_->Stop();
 893   RendererIsResponsive();
 894 }
 895
 896 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 897   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 898 }
 899
 900 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 901       const blink::WebMouseEvent& mouse_event,
 902       const ui::LatencyInfo& ui_latency) {
 903   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 904                "x", mouse_event.x, "y", mouse_event.y);
 905
 906   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 907     if (mouse_event_callbacks_[i].Run(mouse_event))
 908       return;
 909   }
 910
 911   if (IgnoreInputEvents())
 912     return;
 913
 914   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 915     return;
 916
 917   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 918   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 919   input_router_->SendMouseEvent(mouse_with_latency);
 920
 921   // Pass mouse state to gpu service if the subscribe uniform
 922   // extension is enabled.
 923   if (process_->SubscribeUniformEnabled()) {
 924     gpu::ValueState state;
 925     state.int_value[0] = mouse_event.x;
 926     state.int_value[1] = mouse_event.y;
 927     // TODO(orglofch) Separate the mapping of pending value states to the
 928     // Gpu Service to be per RWH not per process
 929     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 930   }
 931 }
 932
 933 void RenderWidgetHostImpl::ForwardWheelEvent(
 934     const WebMouseWheelEvent& wheel_event) {
 935   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 936 }
 937
 938 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 939       const blink::WebMouseWheelEvent& wheel_event,
 940       const ui::LatencyInfo& ui_latency) {
 941   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 942
 943   if (IgnoreInputEvents())
 944     return;
 945
 946   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 947     return;
 948
 949   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 950   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 951   input_router_->SendWheelEvent(wheel_with_latency);
 952 }
 953
 954 void RenderWidgetHostImpl::ForwardGestureEvent(
 955     const blink::WebGestureEvent& gesture_event) {
 956   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 957 }
 958
 959 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 960     const blink::WebGestureEvent& gesture_event,
 961     const ui::LatencyInfo& ui_latency) {
 962   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 963   // Early out if necessary, prior to performing latency logic.
 964   if (IgnoreInputEvents())
 965     return;
 966
 967   if (delegate_->PreHandleGestureEvent(gesture_event))
 968     return;
 969
 970   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 971   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 972   input_router_->SendGestureEvent(gesture_with_latency);
 973 }
 974
 975 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 976       const blink::WebTouchEvent& touch_event) {
 977   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 978
 979   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 980   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 981   input_router_->SendTouchEvent(touch_with_latency);
 982 }
 983
 984 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 985       const blink::WebTouchEvent& touch_event,
 986       const ui::LatencyInfo& ui_latency) {
 987   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 988
 989   // Always forward TouchEvents for touch stream consistency. They will be
 990   // ignored if appropriate in FilterInputEvent().
 991
 992   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
 993   if (touch_emulator_ &&
 994       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 995     if (view_) {
 996       view_->ProcessAckedTouchEvent(
 997           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 998     }
 999     return;
1000   }
1001
1002   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
1003   input_router_->SendTouchEvent(touch_with_latency);
1004 }
1005
1006 void RenderWidgetHostImpl::ForwardKeyboardEvent(
1007     const NativeWebKeyboardEvent& key_event) {
1008   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
1009   if (IgnoreInputEvents())
1010     return;
1011
1012   if (!process_->HasConnection())
1013     return;
1014
1015   // First, let keypress listeners take a shot at handling the event.  If a
1016   // listener handles the event, it should not be propagated to the renderer.
1017   if (KeyPressListenersHandleEvent(key_event)) {
1018     // Some keypresses that are accepted by the listener might have follow up
1019     // char events, which should be ignored.
1020     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1021       suppress_next_char_events_ = true;
1022     return;
1023   }
1024
1025   if (key_event.type == WebKeyboardEvent::Char &&
1026       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1027        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1028     OnUserGesture();
1029   }
1030
1031   // Double check the type to make sure caller hasn't sent us nonsense that
1032   // will mess up our key queue.
1033   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1034     return;
1035
1036   if (suppress_next_char_events_) {
1037     // If preceding RawKeyDown event was handled by the browser, then we need
1038     // suppress all Char events generated by it. Please note that, one
1039     // RawKeyDown event may generate multiple Char events, so we can't reset
1040     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1041     if (key_event.type == WebKeyboardEvent::Char)
1042       return;
1043     // We get a KeyUp or a RawKeyDown event.
1044     suppress_next_char_events_ = false;
1045   }
1046
1047   bool is_shortcut = false;
1048
1049   // Only pre-handle the key event if it's not handled by the input method.
1050   if (delegate_ && !key_event.skip_in_browser) {
1051     // We need to set |suppress_next_char_events_| to true if
1052     // PreHandleKeyboardEvent() returns true, but |this| may already be
1053     // destroyed at that time. So set |suppress_next_char_events_| true here,
1054     // then revert it afterwards when necessary.
1055     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1056       suppress_next_char_events_ = true;
1057
1058     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1059     // a hung/malicious renderer from interfering.
1060     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1061       return;
1062
1063     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1064       suppress_next_char_events_ = false;
1065   }
1066
1067   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1068     return;
1069
1070   ui::LatencyInfo latency;
1071   latency_tracker_.OnInputEvent(key_event, &latency);
1072   input_router_->SendKeyboardEvent(key_event, latency, is_shortcut);
1073 }
1074
1075 void RenderWidgetHostImpl::QueueSyntheticGesture(
1076     scoped_ptr<SyntheticGesture> synthetic_gesture,
1077     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1078   if (!synthetic_gesture_controller_ && view_) {
1079     synthetic_gesture_controller_.reset(
1080         new SyntheticGestureController(
1081             view_->CreateSyntheticGestureTarget().Pass()));
1082   }
1083   if (synthetic_gesture_controller_) {
1084     synthetic_gesture_controller_->QueueSyntheticGesture(
1085         synthetic_gesture.Pass(), on_complete);
1086   }
1087 }
1088
1089 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1090   if (!view_)
1091     return;
1092   view_->UpdateCursor(cursor);
1093 }
1094
1095 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1096   Send(new ViewMsg_ShowContextMenu(
1097       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1098 }
1099
1100 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1101   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1102 }
1103
1104 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1105   return latency_tracker_.latency_component_id();
1106 }
1107
1108 // static
1109 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1110   g_check_for_pending_resize_ack = false;
1111 }
1112
1113 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1114     const KeyPressEventCallback& callback) {
1115   key_press_event_callbacks_.push_back(callback);
1116 }
1117
1118 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1119     const KeyPressEventCallback& callback) {
1120   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1121     if (key_press_event_callbacks_[i].Equals(callback)) {
1122       key_press_event_callbacks_.erase(
1123           key_press_event_callbacks_.begin() + i);
1124       return;
1125     }
1126   }
1127 }
1128
1129 void RenderWidgetHostImpl::AddMouseEventCallback(
1130     const MouseEventCallback& callback) {
1131   mouse_event_callbacks_.push_back(callback);
1132 }
1133
1134 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1135     const MouseEventCallback& callback) {
1136   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1137     if (mouse_event_callbacks_[i].Equals(callback)) {
1138       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1139       return;
1140     }
1141   }
1142 }
1143
1144 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1145   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1146   if (view_)
1147     view_->GetScreenInfo(result);
1148   else
1149     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1150   // TODO(sievers): find a way to make this done another way so the method
1151   // can be const.
1152   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1153 }
1154
1155 const NativeWebKeyboardEvent*
1156     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1157   return input_router_->GetLastKeyboardEvent();
1158 }
1159
1160 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1161   if (delegate_)
1162     delegate_->ScreenInfoChanged();
1163
1164   // The resize message (which may not happen immediately) will carry with it
1165   // the screen info as well as the new size (if the screen has changed scale
1166   // factor).
1167   WasResized();
1168 }
1169
1170 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1171     const base::Callback<void(const unsigned char*,size_t)> callback) {
1172   int id = next_browser_snapshot_id_++;
1173   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1174   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1175 }
1176
1177 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1178                                               size_t offset,
1179                                               const gfx::Range& range) {
1180   if (view_)
1181     view_->SelectionChanged(text, offset, range);
1182 }
1183
1184 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1185     const ViewHostMsg_SelectionBounds_Params& params) {
1186   if (view_) {
1187     view_->SelectionBoundsChanged(params);
1188   }
1189 }
1190
1191 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1192                                                  base::TimeDelta interval) {
1193   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1194 }
1195
1196 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1197                                           int exit_code) {
1198   // Clearing this flag causes us to re-create the renderer when recovering
1199   // from a crashed renderer.
1200   renderer_initialized_ = false;
1201
1202   waiting_for_screen_rects_ack_ = false;
1203
1204   // Must reset these to ensure that keyboard events work with a new renderer.
1205   suppress_next_char_events_ = false;
1206
1207   // Reset some fields in preparation for recovering from a crash.
1208   ResetSizeAndRepaintPendingFlags();
1209   current_size_.SetSize(0, 0);
1210   // After the renderer crashes, the view is destroyed and so the
1211   // RenderWidgetHost cannot track its visibility anymore. We assume such
1212   // RenderWidgetHost to be visible for the sake of internal accounting - be
1213   // careful about changing this - see http://crbug.com/401859.
1214   //
1215   // We need to at least make sure that the RenderProcessHost is notified about
1216   // the |is_hidden_| change, so that the renderer will have correct visibility
1217   // set when respawned.
1218   if (is_hidden_) {
1219     process_->WidgetRestored();
1220     is_hidden_ = false;
1221   }
1222
1223   // Reset this to ensure the hung renderer mechanism is working properly.
1224   in_flight_event_count_ = 0;
1225   StopHangMonitorTimeout();
1226
1227   if (view_) {
1228     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1229                                                gfx::GLSurfaceHandle());
1230     view_->RenderProcessGone(status, exit_code);
1231     view_ = NULL; // The View should be deleted by RenderProcessGone.
1232     view_weak_.reset();
1233   }
1234
1235   // Reconstruct the input router to ensure that it has fresh state for a new
1236   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1237   // event. (In particular, the above call to view_->RenderProcessGone will
1238   // destroy the aura window, which may dispatch a synthetic mouse move.)
1239   input_router_.reset(new InputRouterImpl(
1240       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1241
1242   synthetic_gesture_controller_.reset();
1243 }
1244
1245 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1246   text_direction_updated_ = true;
1247   text_direction_ = direction;
1248 }
1249
1250 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1251   if (text_direction_updated_)
1252     text_direction_canceled_ = true;
1253 }
1254
1255 void RenderWidgetHostImpl::NotifyTextDirection() {
1256   if (text_direction_updated_) {
1257     if (!text_direction_canceled_)
1258       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1259     text_direction_updated_ = false;
1260     text_direction_canceled_ = false;
1261   }
1262 }
1263
1264 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1265   input_method_active_ = activate;
1266   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1267 }
1268
1269 void RenderWidgetHostImpl::CandidateWindowShown() {
1270   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1271 }
1272
1273 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1274   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1275 }
1276
1277 void RenderWidgetHostImpl::CandidateWindowHidden() {
1278   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1279 }
1280
1281 void RenderWidgetHostImpl::ImeSetComposition(
1282     const base::string16& text,
1283     const std::vector<blink::WebCompositionUnderline>& underlines,
1284     int selection_start,
1285     int selection_end) {
1286   Send(new InputMsg_ImeSetComposition(
1287             GetRoutingID(), text, underlines, selection_start, selection_end));
1288 }
1289
1290 void RenderWidgetHostImpl::ImeConfirmComposition(
1291     const base::string16& text,
1292     const gfx::Range& replacement_range,
1293     bool keep_selection) {
1294   Send(new InputMsg_ImeConfirmComposition(
1295         GetRoutingID(), text, replacement_range, keep_selection));
1296 }
1297
1298 void RenderWidgetHostImpl::ImeCancelComposition() {
1299   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1300             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1301 }
1302
1303 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1304   return gfx::Rect();
1305 }
1306
1307 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1308                                               bool last_unlocked_by_target) {
1309   // Directly reject to lock the mouse. Subclass can override this method to
1310   // decide whether to allow mouse lock or not.
1311   GotResponseToLockMouseRequest(false);
1312 }
1313
1314 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1315   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1316   if (pending_mouse_lock_request_) {
1317     pending_mouse_lock_request_ = false;
1318     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1319   } else if (IsMouseLocked()) {
1320     view_->UnlockMouse();
1321   }
1322 }
1323
1324 bool RenderWidgetHostImpl::IsMouseLocked() const {
1325   return view_ ? view_->IsMouseLocked() : false;
1326 }
1327
1328 bool RenderWidgetHostImpl::IsFullscreenGranted() const {
1329   return false;
1330 }
1331
1332 blink::WebDisplayMode RenderWidgetHostImpl::GetDisplayMode() const {
1333   return blink::WebDisplayModeBrowser;
1334 }
1335
1336 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1337                                          const gfx::Size& min_size,
1338                                          const gfx::Size& max_size) {
1339   auto_resize_enabled_ = enable;
1340   min_size_for_auto_resize_ = min_size;
1341   max_size_for_auto_resize_ = max_size;
1342 }
1343
1344 void RenderWidgetHostImpl::Destroy() {
1345   NotificationService::current()->Notify(
1346       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1347       Source<RenderWidgetHost>(this),
1348       NotificationService::NoDetails());
1349
1350   // Tell the view to die.
1351   // Note that in the process of the view shutting down, it can call a ton
1352   // of other messages on us.  So if you do any other deinitialization here,
1353   // do it after this call to view_->Destroy().
1354   if (view_) {
1355     view_->Destroy();
1356     view_ = nullptr;
1357   }
1358
1359   delete this;
1360 }
1361
1362 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1363   NotificationService::current()->Notify(
1364       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1365       Source<RenderWidgetHost>(this),
1366       NotificationService::NoDetails());
1367   is_unresponsive_ = true;
1368   NotifyRendererUnresponsive();
1369 }
1370
1371 void RenderWidgetHostImpl::RendererIsResponsive() {
1372   if (is_unresponsive_) {
1373     is_unresponsive_ = false;
1374     NotifyRendererResponsive();
1375   }
1376 }
1377
1378 void RenderWidgetHostImpl::OnRenderViewReady() {
1379   SendScreenRects();
1380   WasResized();
1381 }
1382
1383 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1384   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1385   // it handles destruction.
1386   if (!owned_by_render_frame_host_) {
1387     // TODO(evanm): This synchronously ends up calling "delete this".
1388     // Is that really what we want in response to this message?  I'm matching
1389     // previous behavior of the code here.
1390     Destroy();
1391   } else {
1392     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1393   }
1394 }
1395
1396 void RenderWidgetHostImpl::OnClose() {
1397   Shutdown();
1398 }
1399
1400 void RenderWidgetHostImpl::OnSetTooltipText(
1401     const base::string16& tooltip_text,
1402     WebTextDirection text_direction_hint) {
1403   // First, add directionality marks around tooltip text if necessary.
1404   // A naive solution would be to simply always wrap the text. However, on
1405   // windows, Unicode directional embedding characters can't be displayed on
1406   // systems that lack RTL fonts and are instead displayed as empty squares.
1407   //
1408   // To get around this we only wrap the string when we deem it necessary i.e.
1409   // when the locale direction is different than the tooltip direction hint.
1410   //
1411   // Currently, we use element's directionality as the tooltip direction hint.
1412   // An alternate solution would be to set the overall directionality based on
1413   // trying to detect the directionality from the tooltip text rather than the
1414   // element direction.  One could argue that would be a preferable solution
1415   // but we use the current approach to match Fx & IE's behavior.
1416   base::string16 wrapped_tooltip_text = tooltip_text;
1417   if (!tooltip_text.empty()) {
1418     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1419       // Force the tooltip to have LTR directionality.
1420       wrapped_tooltip_text =
1421           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1422     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1423                !base::i18n::IsRTL()) {
1424       // Force the tooltip to have RTL directionality.
1425       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1426     }
1427   }
1428   if (GetView())
1429     view_->SetTooltipText(wrapped_tooltip_text);
1430 }
1431
1432 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1433   waiting_for_screen_rects_ack_ = false;
1434   if (!view_)
1435     return;
1436
1437   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1438       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1439     return;
1440   }
1441
1442   SendScreenRects();
1443 }
1444
1445 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1446   if (view_) {
1447     view_->SetBounds(pos);
1448     Send(new ViewMsg_Move_ACK(routing_id_));
1449   }
1450 }
1451
1452 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1453     const IPC::Message& message) {
1454   // This trace event is used in
1455   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1456   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1457   ViewHostMsg_SwapCompositorFrame::Param param;
1458   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1459     return false;
1460   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1461   uint32 output_surface_id = get<0>(param);
1462   get<1>(param).AssignTo(frame.get());
1463   std::vector<IPC::Message> messages_to_deliver_with_frame;
1464   messages_to_deliver_with_frame.swap(get<2>(param));
1465
1466   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1467
1468   input_router_->OnViewUpdated(
1469       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1470
1471   if (touch_emulator_) {
1472     touch_emulator_->SetDoubleTapSupportForPageEnabled(
1473         !IsMobileOptimizedFrame(frame->metadata));
1474   }
1475
1476   if (view_) {
1477     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1478     view_->DidReceiveRendererFrame();
1479   } else {
1480     cc::CompositorFrameAck ack;
1481     if (frame->gl_frame_data) {
1482       ack.gl_frame_data = frame->gl_frame_data.Pass();
1483       ack.gl_frame_data->sync_point = 0;
1484     } else if (frame->delegated_frame_data) {
1485       cc::TransferableResource::ReturnResources(
1486           frame->delegated_frame_data->resource_list,
1487           &ack.resources);
1488     } else if (frame->software_frame_data) {
1489       ack.last_software_frame_id = frame->software_frame_data->id;
1490     }
1491     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1492                                process_->GetID(), ack);
1493   }
1494
1495   RenderProcessHost* rph = GetProcess();
1496   for (std::vector<IPC::Message>::const_iterator i =
1497            messages_to_deliver_with_frame.begin();
1498        i != messages_to_deliver_with_frame.end();
1499        ++i) {
1500     rph->OnMessageReceived(*i);
1501     if (i->dispatch_error())
1502       rph->OnBadMessageReceived(*i);
1503   }
1504   messages_to_deliver_with_frame.clear();
1505
1506   return true;
1507 }
1508
1509 void RenderWidgetHostImpl::OnUpdateRect(
1510     const ViewHostMsg_UpdateRect_Params& params) {
1511   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1512   TimeTicks paint_start = TimeTicks::Now();
1513
1514   // Update our knowledge of the RenderWidget's size.
1515   current_size_ = params.view_size;
1516
1517   bool is_resize_ack =
1518       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1519
1520   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1521   // that will end up reaching GetBackingStore.
1522   if (is_resize_ack) {
1523     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1524     resize_ack_pending_ = false;
1525   }
1526
1527   bool is_repaint_ack =
1528       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1529   if (is_repaint_ack) {
1530     DCHECK(repaint_ack_pending_);
1531     TRACE_EVENT_ASYNC_END0(
1532         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1533     repaint_ack_pending_ = false;
1534     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1535     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1536   }
1537
1538   DCHECK(!params.view_size.IsEmpty());
1539
1540   DidUpdateBackingStore(params, paint_start);
1541
1542   if (auto_resize_enabled_) {
1543     bool post_callback = new_auto_size_.IsEmpty();
1544     new_auto_size_ = params.view_size;
1545     if (post_callback) {
1546       base::MessageLoop::current()->PostTask(
1547           FROM_HERE,
1548           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1549                      weak_factory_.GetWeakPtr()));
1550     }
1551   }
1552
1553   // Log the time delta for processing a paint message. On platforms that don't
1554   // support asynchronous painting, this is equivalent to
1555   // MPArch.RWH_TotalPaintTime.
1556   TimeDelta delta = TimeTicks::Now() - paint_start;
1557   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1558 }
1559
1560 void RenderWidgetHostImpl::DidUpdateBackingStore(
1561     const ViewHostMsg_UpdateRect_Params& params,
1562     const TimeTicks& paint_start) {
1563   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1564   TimeTicks update_start = TimeTicks::Now();
1565
1566   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1567   // will not be re-issued, so must move them now, regardless of whether we
1568   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1569   // in the process could dispatch other window messages which could cause the
1570   // view to be destroyed.
1571   if (view_)
1572     view_->MovePluginWindows(params.plugin_window_moves);
1573
1574   NotificationService::current()->Notify(
1575       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1576       Source<RenderWidgetHost>(this),
1577       NotificationService::NoDetails());
1578
1579   // We don't need to update the view if the view is hidden. We must do this
1580   // early return after the ACK is sent, however, or the renderer will not send
1581   // us more data.
1582   if (is_hidden_)
1583     return;
1584
1585   // If we got a resize ack, then perhaps we have another resize to send?
1586   bool is_resize_ack =
1587       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1588   if (is_resize_ack)
1589     WasResized();
1590
1591   // Log the time delta for processing a paint message.
1592   TimeTicks now = TimeTicks::Now();
1593   TimeDelta delta = now - update_start;
1594   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1595 }
1596
1597 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1598     const SyntheticGesturePacket& gesture_packet) {
1599   // Only allow untrustworthy gestures if explicitly enabled.
1600   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1601           cc::switches::kEnableGpuBenchmarking)) {
1602     bad_message::ReceivedBadMessage(GetProcess(),
1603                                     bad_message::RWH_SYNTHETIC_GESTURE);
1604     return;
1605   }
1606
1607   QueueSyntheticGesture(
1608         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1609         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1610                    weak_factory_.GetWeakPtr()));
1611 }
1612
1613 void RenderWidgetHostImpl::OnFocus() {
1614   // Only RenderViewHost can deal with that message.
1615   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1616 }
1617
1618 void RenderWidgetHostImpl::OnBlur() {
1619   // Only RenderViewHost can deal with that message.
1620   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1621 }
1622
1623 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1624   SetCursor(cursor);
1625 }
1626
1627 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1628     bool enabled, ui::GestureProviderConfigType config_type) {
1629   if (enabled) {
1630     if (!touch_emulator_)
1631       touch_emulator_.reset(new TouchEmulator(this));
1632     touch_emulator_->Enable(config_type);
1633   } else {
1634     if (touch_emulator_)
1635       touch_emulator_->Disable();
1636   }
1637 }
1638
1639 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1640     ui::TextInputType type,
1641     ui::TextInputMode input_mode,
1642     bool can_compose_inline,
1643     int flags) {
1644   if (view_)
1645     view_->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
1646 }
1647
1648 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1649     const gfx::Range& range,
1650     const std::vector<gfx::Rect>& character_bounds) {
1651   if (view_)
1652     view_->ImeCompositionRangeChanged(range, character_bounds);
1653 }
1654
1655 void RenderWidgetHostImpl::OnImeCancelComposition() {
1656   if (view_)
1657     view_->ImeCancelComposition();
1658 }
1659
1660 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1661                                        bool last_unlocked_by_target,
1662                                        bool privileged) {
1663
1664   if (pending_mouse_lock_request_) {
1665     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1666     return;
1667   } else if (IsMouseLocked()) {
1668     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1669     return;
1670   }
1671
1672   pending_mouse_lock_request_ = true;
1673   if (privileged && allow_privileged_mouse_lock_) {
1674     // Directly approve to lock the mouse.
1675     GotResponseToLockMouseRequest(true);
1676   } else {
1677     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1678   }
1679 }
1680
1681 void RenderWidgetHostImpl::OnUnlockMouse() {
1682   RejectMouseLockOrUnlockIfNecessary();
1683 }
1684
1685 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1686     const gfx::Rect& rect_pixels,
1687     const gfx::Size& size,
1688     const cc::SharedBitmapId& id) {
1689   DCHECK(!rect_pixels.IsEmpty());
1690   DCHECK(!size.IsEmpty());
1691
1692   scoped_ptr<cc::SharedBitmap> bitmap =
1693       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1694   if (!bitmap) {
1695     bad_message::ReceivedBadMessage(GetProcess(),
1696                                     bad_message::RWH_SHARED_BITMAP);
1697     return;
1698   }
1699
1700   DCHECK(bitmap->pixels());
1701
1702   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1703   SkBitmap zoomed_bitmap;
1704   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1705
1706   // Note that |rect| is in coordinates of pixels relative to the window origin.
1707   // Aura-based systems will want to convert this to DIPs.
1708   if (view_)
1709     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1710
1711   // It is assumed that the disambiguation popup will make a copy of the
1712   // provided zoomed image, so we delete this one.
1713   zoomed_bitmap.setPixels(0);
1714   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1715 }
1716
1717 #if defined(OS_WIN)
1718 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1719     gfx::NativeViewId dummy_activation_window) {
1720   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1721
1722   // This may happen as a result of a race condition when the plugin is going
1723   // away.
1724   wchar_t window_title[MAX_PATH + 1] = {0};
1725   if (!IsWindow(hwnd) ||
1726       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1727       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1728     return;
1729   }
1730
1731 #if defined(USE_AURA)
1732   SetParent(hwnd,
1733             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1734 #else
1735   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1736 #endif
1737   dummy_windows_for_activation_.push_back(hwnd);
1738 }
1739
1740 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1741     gfx::NativeViewId dummy_activation_window) {
1742   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1743   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1744   for (; i != dummy_windows_for_activation_.end(); ++i) {
1745     if ((*i) == hwnd) {
1746       dummy_windows_for_activation_.erase(i);
1747       return;
1748     }
1749   }
1750   NOTREACHED() << "Unknown dummy window";
1751 }
1752 #endif
1753
1754 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1755   ignore_input_events_ = ignore_input_events;
1756 }
1757
1758 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1759     const NativeWebKeyboardEvent& event) {
1760   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1761     return false;
1762
1763   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1764     size_t original_size = key_press_event_callbacks_.size();
1765     if (key_press_event_callbacks_[i].Run(event))
1766       return true;
1767
1768     // Check whether the callback that just ran removed itself, in which case
1769     // the iterator needs to be decremented to properly account for the removal.
1770     size_t current_size = key_press_event_callbacks_.size();
1771     if (current_size != original_size) {
1772       DCHECK_EQ(original_size - 1, current_size);
1773       --i;
1774     }
1775   }
1776
1777   return false;
1778 }
1779
1780 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1781     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1782   // Don't ignore touch cancel events, since they may be sent while input
1783   // events are being ignored in order to keep the renderer from getting
1784   // confused about how many touches are active.
1785   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1786     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1787
1788   if (!process_->HasConnection())
1789     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1790
1791   if (event.type == WebInputEvent::MouseDown ||
1792       event.type == WebInputEvent::GestureTapDown) {
1793     OnUserGesture();
1794   }
1795
1796   return view_ ? view_->FilterInputEvent(event)
1797                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1798 }
1799
1800 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1801   increment_in_flight_event_count();
1802   if (!is_hidden_)
1803     StartHangMonitorTimeout(hung_renderer_delay_);
1804 }
1805
1806 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1807   if (decrement_in_flight_event_count() <= 0) {
1808     // Cancel pending hung renderer checks since the renderer is responsive.
1809     StopHangMonitorTimeout();
1810   } else {
1811     // The renderer is responsive, but there are in-flight events to wait for.
1812     if (!is_hidden_)
1813       RestartHangMonitorTimeout();
1814   }
1815 }
1816
1817 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1818   has_touch_handler_ = has_handlers;
1819 }
1820
1821 void RenderWidgetHostImpl::DidFlush() {
1822   if (synthetic_gesture_controller_)
1823     synthetic_gesture_controller_->OnDidFlushInput();
1824 }
1825
1826 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1827   if (view_)
1828     view_->DidOverscroll(params);
1829 }
1830
1831 void RenderWidgetHostImpl::DidStopFlinging() {
1832   if (view_)
1833     view_->DidStopFlinging();
1834 }
1835
1836 void RenderWidgetHostImpl::OnKeyboardEventAck(
1837       const NativeWebKeyboardEvent& event,
1838       InputEventAckState ack_result) {
1839 #if defined(OS_MACOSX)
1840   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1841     return;
1842 #endif
1843
1844   // We only send unprocessed key event upwards if we are not hidden,
1845   // because the user has moved away from us and no longer expect any effect
1846   // of this key event.
1847   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1848   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1849     delegate_->HandleKeyboardEvent(event);
1850
1851     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1852     // (i.e.  in the case of Ctrl+W, where the call to
1853     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1854   }
1855 }
1856
1857 void RenderWidgetHostImpl::OnWheelEventAck(
1858     const MouseWheelEventWithLatencyInfo& wheel_event,
1859     InputEventAckState ack_result) {
1860   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1861
1862   if (!is_hidden() && view_) {
1863     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1864         delegate_->HandleWheelEvent(wheel_event.event)) {
1865       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1866     }
1867     view_->WheelEventAck(wheel_event.event, ack_result);
1868   }
1869 }
1870
1871 void RenderWidgetHostImpl::OnGestureEventAck(
1872     const GestureEventWithLatencyInfo& event,
1873     InputEventAckState ack_result) {
1874   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1875
1876   if (view_)
1877     view_->GestureEventAck(event.event, ack_result);
1878 }
1879
1880 void RenderWidgetHostImpl::OnTouchEventAck(
1881     const TouchEventWithLatencyInfo& event,
1882     InputEventAckState ack_result) {
1883   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1884
1885   if (touch_emulator_ &&
1886       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1887     return;
1888   }
1889
1890   if (view_)
1891     view_->ProcessAckedTouchEvent(event, ack_result);
1892 }
1893
1894 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1895   if (type == BAD_ACK_MESSAGE) {
1896     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1897   } else if (type == UNEXPECTED_EVENT_TYPE) {
1898     suppress_next_char_events_ = false;
1899   }
1900 }
1901
1902 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1903     SyntheticGesture::Result result) {
1904   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1905 }
1906
1907 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1908   return ignore_input_events_ || process_->IgnoreInputEvents();
1909 }
1910
1911 void RenderWidgetHostImpl::StartUserGesture() {
1912   OnUserGesture();
1913 }
1914
1915 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1916   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1917 }
1918
1919 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1920     const std::vector<EditCommand>& commands) {
1921   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1922 }
1923
1924 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1925                                               const std::string& value) {
1926   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1927 }
1928
1929 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1930     const gfx::Rect& rect) {
1931   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1932 }
1933
1934 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1935   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1936 }
1937
1938 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1939   if (!allowed) {
1940     RejectMouseLockOrUnlockIfNecessary();
1941     return false;
1942   } else {
1943     if (!pending_mouse_lock_request_) {
1944       // This is possible, e.g., the plugin sends us an unlock request before
1945       // the user allows to lock to mouse.
1946       return false;
1947     }
1948
1949     pending_mouse_lock_request_ = false;
1950     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1951       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1952       return false;
1953     } else {
1954       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1955       return true;
1956     }
1957   }
1958 }
1959
1960 // static
1961 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1962     int32 route_id,
1963     uint32 output_surface_id,
1964     int renderer_host_id,
1965     const cc::CompositorFrameAck& ack) {
1966   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1967   if (!host)
1968     return;
1969   host->Send(new ViewMsg_SwapCompositorFrameAck(
1970       route_id, output_surface_id, ack));
1971 }
1972
1973 // static
1974 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1975     int32 route_id,
1976     uint32 output_surface_id,
1977     int renderer_host_id,
1978     const cc::CompositorFrameAck& ack) {
1979   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1980   if (!host)
1981     return;
1982   host->Send(
1983       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1984 }
1985
1986 void RenderWidgetHostImpl::DelayedAutoResized() {
1987   gfx::Size new_size = new_auto_size_;
1988   // Clear the new_auto_size_ since the empty value is used as a flag to
1989   // indicate that no callback is in progress (i.e. without this line
1990   // DelayedAutoResized will not get called again).
1991   new_auto_size_.SetSize(0, 0);
1992   if (!auto_resize_enabled_)
1993     return;
1994
1995   OnRenderAutoResized(new_size);
1996 }
1997
1998 void RenderWidgetHostImpl::DetachDelegate() {
1999   delegate_ = NULL;
2000 }
2001
2002 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
2003   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2004   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2005                                GetLatencyComponentId(),
2006                                &window_snapshot_component)) {
2007     int sequence_number = static_cast<int>(
2008         window_snapshot_component.sequence_number);
2009 #if defined(OS_MACOSX)
2010     // On Mac, when using CoreAnmation, there is a delay between when content
2011     // is drawn to the screen, and when the snapshot will actually pick up
2012     // that content. Insert a manual delay of 1/6th of a second (to simulate
2013     // 10 frames at 60 fps) before actually taking the snapshot.
2014     base::MessageLoop::current()->PostDelayedTask(
2015         FROM_HERE,
2016         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2017                    weak_factory_.GetWeakPtr(),
2018                    sequence_number),
2019         base::TimeDelta::FromSecondsD(1. / 6));
2020 #else
2021     WindowSnapshotReachedScreen(sequence_number);
2022 #endif
2023   }
2024
2025   latency_tracker_.OnFrameSwapped(latency_info);
2026 }
2027
2028 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2029   view_->DidReceiveRendererFrame();
2030 }
2031
2032 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2033   DCHECK(base::MessageLoopForUI::IsCurrent());
2034
2035   gfx::Rect view_bounds = GetView()->GetViewBounds();
2036   gfx::Rect snapshot_bounds(view_bounds.size());
2037
2038   std::vector<unsigned char> png;
2039   if (ui::GrabViewSnapshot(
2040       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2041     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2042     return;
2043   }
2044
2045   ui::GrabViewSnapshotAsync(
2046       GetView()->GetNativeView(),
2047       snapshot_bounds,
2048       base::ThreadTaskRunnerHandle::Get(),
2049       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2050                  weak_factory_.GetWeakPtr(),
2051                  snapshot_id));
2052 }
2053
2054 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2055                                                   const unsigned char* data,
2056                                                   size_t size) {
2057   // Any pending snapshots with a lower ID than the one received are considered
2058   // to be implicitly complete, and returned the same snapshot data.
2059   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2060   while(it != pending_browser_snapshots_.end()) {
2061       if (it->first <= snapshot_id) {
2062         it->second.Run(data, size);
2063         pending_browser_snapshots_.erase(it++);
2064       } else {
2065         ++it;
2066       }
2067   }
2068 }
2069
2070 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2071     int snapshot_id,
2072     scoped_refptr<base::RefCountedBytes> png_data) {
2073   if (png_data.get())
2074     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2075   else
2076     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2077 }
2078
2079 // static
2080 void RenderWidgetHostImpl::CompositorFrameDrawn(
2081     const std::vector<ui::LatencyInfo>& latency_info) {
2082   for (size_t i = 0; i < latency_info.size(); i++) {
2083     std::set<RenderWidgetHostImpl*> rwhi_set;
2084     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2085              latency_info[i].latency_components.begin();
2086          b != latency_info[i].latency_components.end();
2087          ++b) {
2088       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2089           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2090           b->first.first == ui::TAB_SHOW_COMPONENT) {
2091         // Matches with GetLatencyComponentId
2092         int routing_id = b->first.second & 0xffffffff;
2093         int process_id = (b->first.second >> 32) & 0xffffffff;
2094         RenderWidgetHost* rwh =
2095             RenderWidgetHost::FromID(process_id, routing_id);
2096         if (!rwh) {
2097           continue;
2098         }
2099         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2100         if (rwhi_set.insert(rwhi).second)
2101           rwhi->FrameSwapped(latency_info[i]);
2102       }
2103     }
2104   }
2105 }
2106
2107 BrowserAccessibilityManager*
2108     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2109   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2110 }
2111
2112 BrowserAccessibilityManager*
2113     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2114   return delegate_ ?
2115       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2116 }
2117
2118 base::TimeDelta RenderWidgetHostImpl::GetEstimatedBrowserCompositeTime() const {
2119   return latency_tracker_.GetEstimatedBrowserCompositeTime();
2120 }
2121
2122 #if defined(OS_WIN)
2123 gfx::NativeViewAccessible
2124     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2125   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2126 }
2127 #endif
2128
2129 }  // namespace content