content/browser/renderer_host/render_widget_host_impl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/render_widget_host_impl.h"
   6
   7 #include <math.h>
   8 #include <set>
   9 #include <utility>
  10
  11 #include "base/auto_reset.h"
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/containers/hash_tables.h"
  15 #include "base/i18n/rtl.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/location.h"
  18 #include "base/metrics/field_trial.h"
  19 #include "base/metrics/histogram.h"
  20 #include "base/single_thread_task_runner.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/thread_task_runner_handle.h"
  24 #include "base/trace_event/trace_event.h"
  25 #include "cc/base/switches.h"
  26 #include "cc/output/compositor_frame.h"
  27 #include "cc/output/compositor_frame_ack.h"
  28 #include "content/browser/accessibility/accessibility_mode_helper.h"
  29 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  30 #include "content/browser/bad_message.h"
  31 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  32 #include "content/browser/gpu/compositor_util.h"
  33 #include "content/browser/gpu/gpu_process_host.h"
  34 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  35 #include "content/browser/gpu/gpu_surface_tracker.h"
  36 #include "content/browser/renderer_host/dip_util.h"
  37 #include "content/browser/renderer_host/frame_metadata_util.h"
  38 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  39 #include "content/browser/renderer_host/input/input_router_impl.h"
  40 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  41 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  42 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  43 #include "content/browser/renderer_host/input/timeout_monitor.h"
  44 #include "content/browser/renderer_host/input/touch_emulator.h"
  45 #include "content/browser/renderer_host/render_process_host_impl.h"
  46 #include "content/browser/renderer_host/render_view_host_impl.h"
  47 #include "content/browser/renderer_host/render_widget_helper.h"
  48 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  49 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  50 #include "content/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 #if defined(OS_MACOSX)
  82 #include "content/browser/renderer_host/render_widget_resize_helper_mac.h"
  83 #endif
  84
  85 using base::Time;
  86 using base::TimeDelta;
  87 using base::TimeTicks;
  88 using blink::WebGestureEvent;
  89 using blink::WebInputEvent;
  90 using blink::WebKeyboardEvent;
  91 using blink::WebMouseEvent;
  92 using blink::WebMouseWheelEvent;
  93 using blink::WebTextDirection;
  94
  95 namespace content {
  96 namespace {
  97
  98 bool g_check_for_pending_resize_ack = true;
  99
 100 // <process id, routing id>
 101 using RenderWidgetHostID = std::pair<int32_t, int32_t>;
 102 using RoutingIDWidgetMap =
 103     base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>;
 104 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 105     LAZY_INSTANCE_INITIALIZER;
 106
 107 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 108 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 109 // iteration (or NULL if there isn't any left).
 110 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 111  public:
 112   RenderWidgetHostIteratorImpl()
 113       : current_index_(0) {
 114   }
 115
 116   ~RenderWidgetHostIteratorImpl() override {}
 117
 118   void Add(RenderWidgetHost* host) {
 119     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 120                                         host->GetRoutingID()));
 121   }
 122
 123   // RenderWidgetHostIterator:
 124   RenderWidgetHost* GetNextHost() override {
 125     RenderWidgetHost* host = NULL;
 126     while (current_index_ < hosts_.size() && !host) {
 127       RenderWidgetHostID id = hosts_[current_index_];
 128       host = RenderWidgetHost::FromID(id.first, id.second);
 129       ++current_index_;
 130     }
 131     return host;
 132   }
 133
 134  private:
 135   std::vector<RenderWidgetHostID> hosts_;
 136   size_t current_index_;
 137
 138   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 139 };
 140
 141 }  // namespace
 142
 143 ///////////////////////////////////////////////////////////////////////////////
 144 // RenderWidgetHostImpl
 145
 146 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 147                                            RenderProcessHost* process,
 148                                            int32_t routing_id,
 149                                            int32_t surface_id,
 150                                            bool hidden)
 151     : view_(NULL),
 152       hung_renderer_delay_(
 153           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs)),
 154       new_content_rendering_delay_(
 155           base::TimeDelta::FromMilliseconds(kNewContentRenderingDelayMs)),
 156       renderer_initialized_(false),
 157       delegate_(delegate),
 158       process_(process),
 159       routing_id_(routing_id),
 160       surface_id_(surface_id),
 161       is_loading_(false),
 162       is_hidden_(hidden),
 163       repaint_ack_pending_(false),
 164       resize_ack_pending_(false),
 165       color_profile_out_of_date_(false),
 166       auto_resize_enabled_(false),
 167       waiting_for_screen_rects_ack_(false),
 168       needs_repainting_on_restore_(false),
 169       is_unresponsive_(false),
 170       in_flight_event_count_(0),
 171       in_get_backing_store_(false),
 172       ignore_input_events_(false),
 173       text_direction_updated_(false),
 174       text_direction_(blink::WebTextDirectionLeftToRight),
 175       text_direction_canceled_(false),
 176       suppress_next_char_events_(false),
 177       pending_mouse_lock_request_(false),
 178       allow_privileged_mouse_lock_(false),
 179       has_touch_handler_(false),
 180       next_browser_snapshot_id_(1),
 181       owned_by_render_frame_host_(false),
 182       is_focused_(false),
 183       weak_factory_(this) {
 184   CHECK(delegate_);
 185   CHECK_NE(MSG_ROUTING_NONE, routing_id_);
 186   DCHECK_EQ(surface_id_, GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 187                              process_->GetID(), routing_id_));
 188
 189   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 190       g_routing_id_widget_map.Get().insert(std::make_pair(
 191           RenderWidgetHostID(process->GetID(), routing_id_), this));
 192   CHECK(result.second) << "Inserting a duplicate item!";
 193   process_->AddRoute(routing_id_, this);
 194
 195   // If we're initially visible, tell the process host that we're alive.
 196   // Otherwise we'll notify the process host when we are first shown.
 197   if (!hidden)
 198     process_->WidgetRestored();
 199
 200   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 201
 202   input_router_.reset(new InputRouterImpl(
 203       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 204
 205   touch_emulator_.reset();
 206
 207   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 208       IsRenderView() ? RenderViewHost::From(this) : NULL);
 209   if (BrowserPluginGuest::IsGuest(rvh) ||
 210       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 211           switches::kDisableHangMonitor)) {
 212     hang_monitor_timeout_.reset(new TimeoutMonitor(
 213         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 214                    weak_factory_.GetWeakPtr())));
 215   }
 216
 217   new_content_rendering_timeout_.reset(new TimeoutMonitor(
 218       base::Bind(&RenderWidgetHostImpl::ClearDisplayedGraphics,
 219                  weak_factory_.GetWeakPtr())));
 220 }
 221
 222 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 223   if (view_weak_)
 224     view_weak_->RenderWidgetHostGone();
 225   SetView(NULL);
 226
 227   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 228   surface_id_ = 0;
 229
 230   process_->RemoveRoute(routing_id_);
 231   g_routing_id_widget_map.Get().erase(
 232       RenderWidgetHostID(process_->GetID(), routing_id_));
 233
 234   if (delegate_)
 235     delegate_->RenderWidgetDeleted(this);
 236 }
 237
 238 // static
 239 RenderWidgetHost* RenderWidgetHost::FromID(
 240     int32_t process_id,
 241     int32_t routing_id) {
 242   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 243 }
 244
 245 // static
 246 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 247     int32_t process_id,
 248     int32_t routing_id) {
 249   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 250   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 251   RoutingIDWidgetMap::iterator it = widgets->find(
 252       RenderWidgetHostID(process_id, routing_id));
 253   return it == widgets->end() ? NULL : it->second;
 254 }
 255
 256 // static
 257 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 258   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 259   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 260   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 261        it != widgets->end();
 262        ++it) {
 263     RenderWidgetHost* widget = it->second;
 264
 265     if (!widget->IsRenderView()) {
 266       hosts->Add(widget);
 267       continue;
 268     }
 269
 270     // Add only active RenderViewHosts.
 271     RenderViewHost* rvh = RenderViewHost::From(widget);
 272     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 273       hosts->Add(widget);
 274   }
 275
 276   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 277 }
 278
 279 // static
 280 scoped_ptr<RenderWidgetHostIterator>
 281 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 282   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 283   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 284   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 285        it != widgets->end();
 286        ++it) {
 287     hosts->Add(it->second);
 288   }
 289
 290   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 291 }
 292
 293 // static
 294 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 295   return rwh->AsRenderWidgetHostImpl();
 296 }
 297
 298 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 299   if (view)
 300     view_weak_ = view->GetWeakPtr();
 301   else
 302     view_weak_.reset();
 303   view_ = view;
 304
 305   // If the renderer has not yet been initialized, then the surface ID
 306   // namespace will be sent during initialization.
 307   if (view_ && renderer_initialized_) {
 308     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 309                                            view_->GetSurfaceIdNamespace()));
 310   }
 311
 312   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 313       surface_id_, GetCompositingSurface());
 314
 315   synthetic_gesture_controller_.reset();
 316 }
 317
 318 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 319   return process_;
 320 }
 321
 322 int RenderWidgetHostImpl::GetRoutingID() const {
 323   return routing_id_;
 324 }
 325
 326 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 327   return view_;
 328 }
 329
 330 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 331   return this;
 332 }
 333
 334 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 335   if (view_)
 336     return view_->GetNativeViewId();
 337   return 0;
 338 }
 339
 340 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 341   if (view_)
 342     return view_->GetCompositingSurface();
 343   return gfx::GLSurfaceHandle();
 344 }
 345
 346 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 347   resize_ack_pending_ = false;
 348   if (repaint_ack_pending_) {
 349     TRACE_EVENT_ASYNC_END0(
 350         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 351   }
 352   repaint_ack_pending_ = false;
 353   if (old_resize_params_)
 354     old_resize_params_->new_size = gfx::Size();
 355 }
 356
 357 void RenderWidgetHostImpl::SendScreenRects() {
 358   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 359     return;
 360
 361   if (is_hidden_) {
 362     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 363     // happens on Win & Mac, and when the view is shown it'll call this again.
 364     return;
 365   }
 366
 367   if (!view_)
 368     return;
 369
 370   last_view_screen_rect_ = view_->GetViewBounds();
 371   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 372   Send(new ViewMsg_UpdateScreenRects(
 373       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 374   if (delegate_)
 375     delegate_->DidSendScreenRects(this);
 376   waiting_for_screen_rects_ack_ = true;
 377 }
 378
 379 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 380   suppress_next_char_events_ = true;
 381 }
 382
 383 void RenderWidgetHostImpl::FlushInput() {
 384   input_router_->RequestNotificationWhenFlushed();
 385   if (synthetic_gesture_controller_)
 386     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 387 }
 388
 389 void RenderWidgetHostImpl::SetNeedsFlush() {
 390   if (view_)
 391     view_->OnSetNeedsFlushInput();
 392 }
 393
 394 void RenderWidgetHostImpl::Init() {
 395   DCHECK(process_->HasConnection());
 396
 397   renderer_initialized_ = true;
 398
 399   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 400       surface_id_, GetCompositingSurface());
 401
 402   // Send the ack along with the information on placement.
 403   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 404   GetProcess()->ResumeRequestsForView(routing_id_);
 405
 406   // If the RWHV has not yet been set, the surface ID namespace will get
 407   // passed down by the call to SetView().
 408   if (view_) {
 409     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 410                                            view_->GetSurfaceIdNamespace()));
 411   }
 412
 413   WasResized();
 414 }
 415
 416 void RenderWidgetHostImpl::InitForFrame() {
 417   DCHECK(process_->HasConnection());
 418   renderer_initialized_ = true;
 419 }
 420
 421 void RenderWidgetHostImpl::Shutdown() {
 422   RejectMouseLockOrUnlockIfNecessary();
 423
 424   if (process_->HasConnection()) {
 425     // Tell the renderer object to close.
 426     bool rv = Send(new ViewMsg_Close(routing_id_));
 427     DCHECK(rv);
 428   }
 429
 430   Destroy();
 431 }
 432
 433 bool RenderWidgetHostImpl::IsLoading() const {
 434   return is_loading_;
 435 }
 436
 437 bool RenderWidgetHostImpl::IsRenderView() const {
 438   return false;
 439 }
 440
 441 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 442   bool handled = true;
 443   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 444     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 445     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 446                         OnQueueSyntheticGesture)
 447     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 448                         OnImeCancelComposition)
 449     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 450     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 451     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 452                         OnUpdateScreenRectsAck)
 453     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 455     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 456                                 OnSwapCompositorFrame(msg))
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 459     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 460     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
 462                         OnTextInputStateChanged)
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 466                         OnShowDisambiguationPopup)
 467     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 468     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 469                         OnSelectionBoundsChanged)
 470 #if defined(OS_WIN)
 471     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 472                         OnWindowlessPluginDummyWindowCreated)
 473     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 474                         OnWindowlessPluginDummyWindowDestroyed)
 475 #endif
 476     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 477                         OnImeCompositionRangeChanged)
 478     IPC_MESSAGE_UNHANDLED(handled = false)
 479   IPC_END_MESSAGE_MAP()
 480
 481   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 482     return true;
 483
 484   if (!handled && view_ && view_->OnMessageReceived(msg))
 485     return true;
 486
 487   return handled;
 488 }
 489
 490 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 491   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 492     return input_router_->SendInput(make_scoped_ptr(msg));
 493
 494   return process_->Send(msg);
 495 }
 496
 497 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 498   is_loading_ = is_loading;
 499   if (!view_)
 500     return;
 501   view_->SetIsLoading(is_loading);
 502 }
 503
 504 void RenderWidgetHostImpl::WasHidden() {
 505   if (is_hidden_)
 506     return;
 507
 508   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
 509   is_hidden_ = true;
 510
 511   // Don't bother reporting hung state when we aren't active.
 512   StopHangMonitorTimeout();
 513
 514   // If we have a renderer, then inform it that we are being hidden so it can
 515   // reduce its resource utilization.
 516   Send(new ViewMsg_WasHidden(routing_id_));
 517
 518   // Tell the RenderProcessHost we were hidden.
 519   process_->WidgetHidden();
 520
 521   bool is_visible = false;
 522   NotificationService::current()->Notify(
 523       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 524       Source<RenderWidgetHost>(this),
 525       Details<bool>(&is_visible));
 526 }
 527
 528 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 529   if (!is_hidden_)
 530     return;
 531
 532   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasShown");
 533   is_hidden_ = false;
 534
 535   SendScreenRects();
 536
 537   // When hidden, timeout monitoring for input events is disabled. Restore it
 538   // now to ensure consistent hang detection.
 539   if (in_flight_event_count_)
 540     RestartHangMonitorTimeout();
 541
 542   // Always repaint on restore.
 543   bool needs_repainting = true;
 544   needs_repainting_on_restore_ = false;
 545   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 546
 547   process_->WidgetRestored();
 548
 549   bool is_visible = true;
 550   NotificationService::current()->Notify(
 551       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 552       Source<RenderWidgetHost>(this),
 553       Details<bool>(&is_visible));
 554
 555   // It's possible for our size to be out of sync with the renderer. The
 556   // following is one case that leads to this:
 557   // 1. WasResized -> Send ViewMsg_Resize to render
 558   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 559   // 3. WasHidden
 560   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 561   //    is hidden. Now renderer/browser out of sync with what they think size
 562   //    is.
 563   // By invoking WasResized the renderer is updated as necessary. WasResized
 564   // does nothing if the sizes are already in sync.
 565   //
 566   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 567   // could handle both the restore and resize at once. This isn't that big a
 568   // deal as RenderWidget::WasShown delays updating, so that the resize from
 569   // WasResized is usually processed before the renderer is painted.
 570   WasResized();
 571 }
 572
 573 bool RenderWidgetHostImpl::GetResizeParams(
 574     ViewMsg_Resize_Params* resize_params) {
 575   *resize_params = ViewMsg_Resize_Params();
 576
 577   GetWebScreenInfo(&resize_params->screen_info);
 578   resize_params->resizer_rect = GetRootWindowResizerRect();
 579
 580   if (view_) {
 581     resize_params->new_size = view_->GetRequestedRendererSize();
 582     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 583     resize_params->top_controls_height = view_->GetTopControlsHeight();
 584     resize_params->top_controls_shrink_blink_size =
 585         view_->DoTopControlsShrinkBlinkSize();
 586     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 587     resize_params->is_fullscreen_granted = IsFullscreenGranted();
 588     resize_params->display_mode = GetDisplayMode();
 589   }
 590
 591   const bool size_changed =
 592       !old_resize_params_ ||
 593       old_resize_params_->new_size != resize_params->new_size ||
 594       (old_resize_params_->physical_backing_size.IsEmpty() &&
 595        !resize_params->physical_backing_size.IsEmpty());
 596   bool dirty = size_changed ||
 597       old_resize_params_->screen_info != resize_params->screen_info ||
 598       old_resize_params_->physical_backing_size !=
 599           resize_params->physical_backing_size ||
 600       old_resize_params_->is_fullscreen_granted !=
 601           resize_params->is_fullscreen_granted ||
 602       old_resize_params_->display_mode != resize_params->display_mode ||
 603       old_resize_params_->top_controls_height !=
 604           resize_params->top_controls_height ||
 605       old_resize_params_->top_controls_shrink_blink_size !=
 606           resize_params->top_controls_shrink_blink_size ||
 607       old_resize_params_->visible_viewport_size !=
 608           resize_params->visible_viewport_size;
 609
 610   // We don't expect to receive an ACK when the requested size or the physical
 611   // backing size is empty, or when the main viewport size didn't change.
 612   resize_params->needs_resize_ack =
 613       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 614       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 615
 616   return dirty;
 617 }
 618
 619 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 620     const ViewMsg_Resize_Params& resize_params) {
 621   resize_ack_pending_ = resize_params.needs_resize_ack;
 622
 623   old_resize_params_ =
 624       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 625 }
 626
 627 void RenderWidgetHostImpl::WasResized() {
 628   // Skip if the |delegate_| has already been detached because
 629   // it's web contents is being deleted.
 630   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 631       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 632     if (resize_ack_pending_ && color_profile_out_of_date_)
 633       DispatchColorProfile();
 634     return;
 635   }
 636
 637   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 638   if (color_profile_out_of_date_)
 639     DispatchColorProfile();
 640   if (!GetResizeParams(params.get()))
 641     return;
 642
 643   bool width_changed =
 644       !old_resize_params_ ||
 645       old_resize_params_->new_size.width() != params->new_size.width();
 646   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 647     resize_ack_pending_ = params->needs_resize_ack;
 648     old_resize_params_.swap(params);
 649   }
 650
 651   if (delegate_)
 652     delegate_->RenderWidgetWasResized(this, width_changed);
 653 }
 654
 655 void RenderWidgetHostImpl::DispatchColorProfile() {
 656 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
 657   static bool image_profiles = base::CommandLine::ForCurrentProcess()->
 658      HasSwitch(switches::kEnableImageColorProfiles);
 659   if (!image_profiles)
 660     return;
 661 #if defined(OS_WIN)
 662   // Windows will read disk to get the color profile data if needed, so
 663   // dispatch the SendColorProfile() work off the UI thread.
 664   BrowserThread::PostBlockingPoolTask(
 665       FROM_HERE,
 666       base::Bind(&RenderWidgetHostImpl::SendColorProfile,
 667                  weak_factory_.GetWeakPtr()));
 668 #elif !defined(OS_CHROMEOS) && !defined(OS_IOS) && !defined(OS_ANDROID)
 669   // Only support desktop Mac and Linux at this time.
 670   SendColorProfile();
 671 #endif
 672 #endif
 673 }
 674
 675 void RenderWidgetHostImpl::SendColorProfile() {
 676   if (!view_ || !delegate_)
 677     return;
 678   DCHECK(!view_->GetRequestedRendererSize().IsEmpty());
 679 #if defined(OS_WIN)
 680   DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::UI));
 681   DCHECK(!BrowserThread::CurrentlyOn(BrowserThread::IO));
 682 #endif
 683   std::vector<char> color_profile;
 684   if (!GetScreenColorProfile(&color_profile))
 685     return;
 686   if (!renderer_initialized_ || !process_->HasConnection())
 687     return;
 688   if (!Send(new ViewMsg_ColorProfile(routing_id_, color_profile)))
 689     return;
 690   color_profile_out_of_date_ = false;
 691 }
 692
 693 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 694   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 695 }
 696
 697 void RenderWidgetHostImpl::GotFocus() {
 698   Focus();
 699   if (delegate_)
 700     delegate_->RenderWidgetGotFocus(this);
 701 }
 702
 703 void RenderWidgetHostImpl::Focus() {
 704   is_focused_ = true;
 705
 706   Send(new InputMsg_SetFocus(routing_id_, true));
 707 }
 708
 709 void RenderWidgetHostImpl::Blur() {
 710   is_focused_ = false;
 711
 712   // If there is a pending mouse lock request, we don't want to reject it at
 713   // this point. The user can switch focus back to this view and approve the
 714   // request later.
 715   if (IsMouseLocked())
 716     view_->UnlockMouse();
 717
 718   if (touch_emulator_)
 719     touch_emulator_->CancelTouch();
 720
 721   Send(new InputMsg_SetFocus(routing_id_, false));
 722 }
 723
 724 void RenderWidgetHostImpl::LostCapture() {
 725   if (touch_emulator_)
 726     touch_emulator_->CancelTouch();
 727
 728   Send(new InputMsg_MouseCaptureLost(routing_id_));
 729 }
 730
 731 void RenderWidgetHostImpl::SetActive(bool active) {
 732   Send(new ViewMsg_SetActive(routing_id_, active));
 733 }
 734
 735 void RenderWidgetHostImpl::LostMouseLock() {
 736   Send(new ViewMsg_MouseLockLost(routing_id_));
 737 }
 738
 739 void RenderWidgetHostImpl::ViewDestroyed() {
 740   RejectMouseLockOrUnlockIfNecessary();
 741
 742   // TODO(evanm): tracking this may no longer be necessary;
 743   // eliminate this function if so.
 744   SetView(NULL);
 745 }
 746
 747 void RenderWidgetHostImpl::CopyFromBackingStore(
 748     const gfx::Rect& src_subrect,
 749     const gfx::Size& accelerated_dst_size,
 750     ReadbackRequestCallback& callback,
 751     const SkColorType preferred_color_type) {
 752   if (view_) {
 753     TRACE_EVENT0("browser",
 754         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 755     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 756         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 757     view_->CopyFromCompositingSurface(accelerated_copy_rect,
 758                                       accelerated_dst_size, callback,
 759                                       preferred_color_type);
 760     return;
 761   }
 762
 763   callback.Run(SkBitmap(), content::READBACK_FAILED);
 764 }
 765
 766 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 767   if (view_)
 768     return view_->IsSurfaceAvailableForCopy();
 769   return false;
 770 }
 771
 772 #if defined(OS_ANDROID)
 773 void RenderWidgetHostImpl::LockBackingStore() {
 774   if (view_)
 775     view_->LockCompositingSurface();
 776 }
 777
 778 void RenderWidgetHostImpl::UnlockBackingStore() {
 779   if (view_)
 780     view_->UnlockCompositingSurface();
 781 }
 782 #endif
 783
 784 #if defined(OS_MACOSX)
 785 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 786   TRACE_EVENT0("browser",
 787       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 788
 789   if (!CanPauseForPendingResizeOrRepaints())
 790     return;
 791
 792   WaitForSurface();
 793 }
 794
 795 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 796   // Do not pause if the view is hidden.
 797   if (is_hidden())
 798     return false;
 799
 800   // Do not pause if there is not a paint or resize already coming.
 801   if (!repaint_ack_pending_ && !resize_ack_pending_)
 802     return false;
 803
 804   return true;
 805 }
 806
 807 void RenderWidgetHostImpl::WaitForSurface() {
 808   // How long to (synchronously) wait for the renderer to respond with a
 809   // new frame when our current frame doesn't exist or is the wrong size.
 810   // This timeout impacts the "choppiness" of our window resize.
 811   const int kPaintMsgTimeoutMS = 50;
 812
 813   if (!view_)
 814     return;
 815
 816   // The view_size will be current_size_ for auto-sized views and otherwise the
 817   // size of the view_. (For auto-sized views, current_size_ is updated during
 818   // UpdateRect messages.)
 819   gfx::Size view_size = current_size_;
 820   if (!auto_resize_enabled_) {
 821     // Get the desired size from the current view bounds.
 822     gfx::Rect view_rect = view_->GetViewBounds();
 823     if (view_rect.IsEmpty())
 824       return;
 825     view_size = view_rect.size();
 826   }
 827
 828   TRACE_EVENT2("renderer_host",
 829                "RenderWidgetHostImpl::WaitForSurface",
 830                "width",
 831                base::IntToString(view_size.width()),
 832                "height",
 833                base::IntToString(view_size.height()));
 834
 835   // We should not be asked to paint while we are hidden.  If we are hidden,
 836   // then it means that our consumer failed to call WasShown.
 837   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 838
 839   // We should never be called recursively; this can theoretically lead to
 840   // infinite recursion and almost certainly leads to lower performance.
 841   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 842   base::AutoReset<bool> auto_reset_in_get_backing_store(
 843       &in_get_backing_store_, true);
 844
 845   // We might have a surface that we can use already.
 846   if (view_->HasAcceleratedSurface(view_size))
 847     return;
 848
 849   // Request that the renderer produce a frame of the right size, if it
 850   // hasn't been requested already.
 851   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 852     repaint_start_time_ = TimeTicks::Now();
 853     repaint_ack_pending_ = true;
 854     TRACE_EVENT_ASYNC_BEGIN0(
 855         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 856     Send(new ViewMsg_Repaint(routing_id_, view_size));
 857   }
 858
 859   // Pump a nested message loop until we time out or get a frame of the right
 860   // size.
 861   TimeTicks start_time = TimeTicks::Now();
 862   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 863   TimeTicks timeout_time = start_time + time_left;
 864   while (1) {
 865     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 866     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 867       // For auto-resized views, current_size_ determines the view_size and it
 868       // may have changed during the handling of an UpdateRect message.
 869       if (auto_resize_enabled_)
 870         view_size = current_size_;
 871       if (view_->HasAcceleratedSurface(view_size))
 872         break;
 873     }
 874     time_left = timeout_time - TimeTicks::Now();
 875     if (time_left <= TimeDelta::FromSeconds(0)) {
 876       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 877       break;
 878     }
 879   }
 880
 881   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 882                              TimeTicks::Now() - start_time,
 883                              TimeDelta::FromMilliseconds(1),
 884                              TimeDelta::FromMilliseconds(200), 50);
 885 }
 886 #endif
 887
 888 bool RenderWidgetHostImpl::ScheduleComposite() {
 889   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 890       resize_ack_pending_) {
 891     return false;
 892   }
 893
 894   // Send out a request to the renderer to paint the view if required.
 895   repaint_start_time_ = TimeTicks::Now();
 896   repaint_ack_pending_ = true;
 897   TRACE_EVENT_ASYNC_BEGIN0(
 898       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 899   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 900   return true;
 901 }
 902
 903 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 904   if (hang_monitor_timeout_)
 905     hang_monitor_timeout_->Start(delay);
 906 }
 907
 908 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 909   if (hang_monitor_timeout_)
 910     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 911 }
 912
 913 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 914   if (hang_monitor_timeout_)
 915     hang_monitor_timeout_->Stop();
 916   RendererIsResponsive();
 917 }
 918
 919 void RenderWidgetHostImpl::StartNewContentRenderingTimeout() {
 920   if (new_content_rendering_timeout_)
 921     new_content_rendering_timeout_->Start(new_content_rendering_delay_);
 922 }
 923
 924 void RenderWidgetHostImpl::StopNewContentRenderingTimeout() {
 925   if (new_content_rendering_timeout_)
 926     new_content_rendering_timeout_->Stop();
 927 }
 928
 929 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 930   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 931 }
 932
 933 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 934       const blink::WebMouseEvent& mouse_event,
 935       const ui::LatencyInfo& ui_latency) {
 936   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 937                "x", mouse_event.x, "y", mouse_event.y);
 938
 939   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 940     if (mouse_event_callbacks_[i].Run(mouse_event))
 941       return;
 942   }
 943
 944   if (IgnoreInputEvents())
 945     return;
 946
 947   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 948     return;
 949
 950   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 951   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 952   input_router_->SendMouseEvent(mouse_with_latency);
 953
 954   // Pass mouse state to gpu service if the subscribe uniform
 955   // extension is enabled.
 956   if (process_->SubscribeUniformEnabled()) {
 957     gpu::ValueState state;
 958     state.int_value[0] = mouse_event.x;
 959     state.int_value[1] = mouse_event.y;
 960     // TODO(orglofch) Separate the mapping of pending value states to the
 961     // Gpu Service to be per RWH not per process
 962     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 963   }
 964 }
 965
 966 void RenderWidgetHostImpl::ForwardWheelEvent(
 967     const WebMouseWheelEvent& wheel_event) {
 968   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 969 }
 970
 971 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 972       const blink::WebMouseWheelEvent& wheel_event,
 973       const ui::LatencyInfo& ui_latency) {
 974   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardWheelEvent",
 975                "dx", wheel_event.deltaX, "dy", wheel_event.deltaY);
 976
 977   if (IgnoreInputEvents())
 978     return;
 979
 980   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 981     return;
 982
 983   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 984   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 985   input_router_->SendWheelEvent(wheel_with_latency);
 986 }
 987
 988 void RenderWidgetHostImpl::ForwardGestureEvent(
 989     const blink::WebGestureEvent& gesture_event) {
 990   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 991 }
 992
 993 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 994     const blink::WebGestureEvent& gesture_event,
 995     const ui::LatencyInfo& ui_latency) {
 996   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 997   // Early out if necessary, prior to performing latency logic.
 998   if (IgnoreInputEvents())
 999     return;
1000
1001   if (delegate_->PreHandleGestureEvent(gesture_event))
1002     return;
1003
1004   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
1005   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
1006   input_router_->SendGestureEvent(gesture_with_latency);
1007 }
1008
1009 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
1010       const blink::WebTouchEvent& touch_event) {
1011   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
1012
1013   TouchEventWithLatencyInfo touch_with_latency(touch_event);
1014   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
1015   input_router_->SendTouchEvent(touch_with_latency);
1016 }
1017
1018 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
1019       const blink::WebTouchEvent& touch_event,
1020       const ui::LatencyInfo& ui_latency) {
1021   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
1022
1023   // Always forward TouchEvents for touch stream consistency. They will be
1024   // ignored if appropriate in FilterInputEvent().
1025
1026   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
1027   if (touch_emulator_ &&
1028       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
1029     if (view_) {
1030       view_->ProcessAckedTouchEvent(
1031           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
1032     }
1033     return;
1034   }
1035
1036   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
1037   input_router_->SendTouchEvent(touch_with_latency);
1038 }
1039
1040 void RenderWidgetHostImpl::ForwardKeyboardEvent(
1041     const NativeWebKeyboardEvent& key_event) {
1042   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
1043   if (IgnoreInputEvents())
1044     return;
1045
1046   if (!process_->HasConnection())
1047     return;
1048
1049   // First, let keypress listeners take a shot at handling the event.  If a
1050   // listener handles the event, it should not be propagated to the renderer.
1051   if (KeyPressListenersHandleEvent(key_event)) {
1052     // Some keypresses that are accepted by the listener might have follow up
1053     // char events, which should be ignored.
1054     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1055       suppress_next_char_events_ = true;
1056     return;
1057   }
1058
1059   if (key_event.type == WebKeyboardEvent::Char &&
1060       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1061        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1062     OnUserGesture();
1063   }
1064
1065   // Double check the type to make sure caller hasn't sent us nonsense that
1066   // will mess up our key queue.
1067   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1068     return;
1069
1070   if (suppress_next_char_events_) {
1071     // If preceding RawKeyDown event was handled by the browser, then we need
1072     // suppress all Char events generated by it. Please note that, one
1073     // RawKeyDown event may generate multiple Char events, so we can't reset
1074     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1075     if (key_event.type == WebKeyboardEvent::Char)
1076       return;
1077     // We get a KeyUp or a RawKeyDown event.
1078     suppress_next_char_events_ = false;
1079   }
1080
1081   bool is_shortcut = false;
1082
1083   // Only pre-handle the key event if it's not handled by the input method.
1084   if (delegate_ && !key_event.skip_in_browser) {
1085     // We need to set |suppress_next_char_events_| to true if
1086     // PreHandleKeyboardEvent() returns true, but |this| may already be
1087     // destroyed at that time. So set |suppress_next_char_events_| true here,
1088     // then revert it afterwards when necessary.
1089     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1090       suppress_next_char_events_ = true;
1091
1092     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1093     // a hung/malicious renderer from interfering.
1094     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1095       return;
1096
1097     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1098       suppress_next_char_events_ = false;
1099   }
1100
1101   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1102     return;
1103
1104   NativeWebKeyboardEventWithLatencyInfo key_event_with_latency(key_event);
1105   latency_tracker_.OnInputEvent(key_event, &key_event_with_latency.latency);
1106   input_router_->SendKeyboardEvent(key_event_with_latency, is_shortcut);
1107 }
1108
1109 void RenderWidgetHostImpl::QueueSyntheticGesture(
1110     scoped_ptr<SyntheticGesture> synthetic_gesture,
1111     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1112   if (!synthetic_gesture_controller_ && view_) {
1113     synthetic_gesture_controller_.reset(
1114         new SyntheticGestureController(
1115             view_->CreateSyntheticGestureTarget().Pass()));
1116   }
1117   if (synthetic_gesture_controller_) {
1118     synthetic_gesture_controller_->QueueSyntheticGesture(
1119         synthetic_gesture.Pass(), on_complete);
1120   }
1121 }
1122
1123 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1124   if (!view_)
1125     return;
1126   view_->UpdateCursor(cursor);
1127 }
1128
1129 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1130   Send(new ViewMsg_ShowContextMenu(
1131       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1132 }
1133
1134 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1135   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1136 }
1137
1138 int64_t RenderWidgetHostImpl::GetLatencyComponentId() const {
1139   return latency_tracker_.latency_component_id();
1140 }
1141
1142 // static
1143 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1144   g_check_for_pending_resize_ack = false;
1145 }
1146
1147 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1148     const KeyPressEventCallback& callback) {
1149   key_press_event_callbacks_.push_back(callback);
1150 }
1151
1152 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1153     const KeyPressEventCallback& callback) {
1154   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1155     if (key_press_event_callbacks_[i].Equals(callback)) {
1156       key_press_event_callbacks_.erase(
1157           key_press_event_callbacks_.begin() + i);
1158       return;
1159     }
1160   }
1161 }
1162
1163 void RenderWidgetHostImpl::AddMouseEventCallback(
1164     const MouseEventCallback& callback) {
1165   mouse_event_callbacks_.push_back(callback);
1166 }
1167
1168 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1169     const MouseEventCallback& callback) {
1170   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1171     if (mouse_event_callbacks_[i].Equals(callback)) {
1172       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1173       return;
1174     }
1175   }
1176 }
1177
1178 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1179   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1180   if (view_)
1181     view_->GetScreenInfo(result);
1182   else
1183     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1184   // TODO(sievers): find a way to make this done another way so the method
1185   // can be const.
1186   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1187 }
1188
1189 bool RenderWidgetHostImpl::GetScreenColorProfile(
1190     std::vector<char>* color_profile) {
1191   DCHECK(color_profile->empty());
1192   if (view_)
1193     return view_->GetScreenColorProfile(color_profile);
1194   return false;
1195 }
1196
1197 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1198   color_profile_out_of_date_ = true;
1199
1200   if (delegate_)
1201     delegate_->ScreenInfoChanged();
1202
1203   // The resize message (which may not happen immediately) will carry with it
1204   // the screen info as well as the new size (if the screen has changed scale
1205   // factor).
1206   WasResized();
1207 }
1208
1209 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1210     const GetSnapshotFromBrowserCallback& callback) {
1211   int id = next_browser_snapshot_id_++;
1212   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1213   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1214 }
1215
1216 const NativeWebKeyboardEvent*
1217     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1218   return input_router_->GetLastKeyboardEvent();
1219 }
1220
1221 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1222                                               size_t offset,
1223                                               const gfx::Range& range) {
1224   if (view_)
1225     view_->SelectionChanged(text, offset, range);
1226 }
1227
1228 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1229     const ViewHostMsg_SelectionBounds_Params& params) {
1230   if (view_) {
1231     view_->SelectionBoundsChanged(params);
1232   }
1233 }
1234
1235 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1236                                                  base::TimeDelta interval) {
1237   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1238 }
1239
1240 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1241                                           int exit_code) {
1242   if (!renderer_initialized_)
1243     return;
1244
1245   // Clearing this flag causes us to re-create the renderer when recovering
1246   // from a crashed renderer.
1247   renderer_initialized_ = false;
1248
1249   waiting_for_screen_rects_ack_ = false;
1250
1251   // Must reset these to ensure that keyboard events work with a new renderer.
1252   suppress_next_char_events_ = false;
1253
1254   // Reset some fields in preparation for recovering from a crash.
1255   ResetSizeAndRepaintPendingFlags();
1256   current_size_.SetSize(0, 0);
1257   // After the renderer crashes, the view is destroyed and so the
1258   // RenderWidgetHost cannot track its visibility anymore. We assume such
1259   // RenderWidgetHost to be invisible for the sake of internal accounting - be
1260   // careful about changing this - see http://crbug.com/401859 and
1261   // http://crbug.com/522795.
1262   //
1263   // We need to at least make sure that the RenderProcessHost is notified about
1264   // the |is_hidden_| change, so that the renderer will have correct visibility
1265   // set when respawned.
1266   if (!is_hidden_) {
1267     process_->WidgetHidden();
1268     is_hidden_ = true;
1269   }
1270
1271   // Reset this to ensure the hung renderer mechanism is working properly.
1272   in_flight_event_count_ = 0;
1273   StopHangMonitorTimeout();
1274
1275   if (view_) {
1276     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1277                                                gfx::GLSurfaceHandle());
1278     view_->RenderProcessGone(status, exit_code);
1279     view_ = nullptr;  // The View should be deleted by RenderProcessGone.
1280     view_weak_.reset();
1281   }
1282
1283   // Reconstruct the input router to ensure that it has fresh state for a new
1284   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1285   // event. (In particular, the above call to view_->RenderProcessGone will
1286   // destroy the aura window, which may dispatch a synthetic mouse move.)
1287   input_router_.reset(new InputRouterImpl(
1288       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1289
1290   synthetic_gesture_controller_.reset();
1291 }
1292
1293 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1294   text_direction_updated_ = true;
1295   text_direction_ = direction;
1296 }
1297
1298 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1299   if (text_direction_updated_)
1300     text_direction_canceled_ = true;
1301 }
1302
1303 void RenderWidgetHostImpl::NotifyTextDirection() {
1304   if (text_direction_updated_) {
1305     if (!text_direction_canceled_)
1306       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1307     text_direction_updated_ = false;
1308     text_direction_canceled_ = false;
1309   }
1310 }
1311
1312 void RenderWidgetHostImpl::ImeSetComposition(
1313     const base::string16& text,
1314     const std::vector<blink::WebCompositionUnderline>& underlines,
1315     int selection_start,
1316     int selection_end) {
1317   Send(new InputMsg_ImeSetComposition(
1318             GetRoutingID(), text, underlines, selection_start, selection_end));
1319 }
1320
1321 void RenderWidgetHostImpl::ImeConfirmComposition(
1322     const base::string16& text,
1323     const gfx::Range& replacement_range,
1324     bool keep_selection) {
1325   Send(new InputMsg_ImeConfirmComposition(
1326         GetRoutingID(), text, replacement_range, keep_selection));
1327 }
1328
1329 void RenderWidgetHostImpl::ImeCancelComposition() {
1330   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1331             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1332 }
1333
1334 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1335   return gfx::Rect();
1336 }
1337
1338 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1339                                               bool last_unlocked_by_target) {
1340   // Directly reject to lock the mouse. Subclass can override this method to
1341   // decide whether to allow mouse lock or not.
1342   GotResponseToLockMouseRequest(false);
1343 }
1344
1345 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1346   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1347   if (pending_mouse_lock_request_) {
1348     pending_mouse_lock_request_ = false;
1349     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1350   } else if (IsMouseLocked()) {
1351     view_->UnlockMouse();
1352   }
1353 }
1354
1355 bool RenderWidgetHostImpl::IsMouseLocked() const {
1356   return view_ ? view_->IsMouseLocked() : false;
1357 }
1358
1359 bool RenderWidgetHostImpl::IsFullscreenGranted() const {
1360   return false;
1361 }
1362
1363 blink::WebDisplayMode RenderWidgetHostImpl::GetDisplayMode() const {
1364   return blink::WebDisplayModeBrowser;
1365 }
1366
1367 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1368                                          const gfx::Size& min_size,
1369                                          const gfx::Size& max_size) {
1370   auto_resize_enabled_ = enable;
1371   min_size_for_auto_resize_ = min_size;
1372   max_size_for_auto_resize_ = max_size;
1373 }
1374
1375 void RenderWidgetHostImpl::Destroy() {
1376   NotificationService::current()->Notify(
1377       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1378       Source<RenderWidgetHost>(this),
1379       NotificationService::NoDetails());
1380
1381   // Tell the view to die.
1382   // Note that in the process of the view shutting down, it can call a ton
1383   // of other messages on us.  So if you do any other deinitialization here,
1384   // do it after this call to view_->Destroy().
1385   if (view_) {
1386     view_->Destroy();
1387     view_ = nullptr;
1388   }
1389
1390   delete this;
1391 }
1392
1393 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1394   NotificationService::current()->Notify(
1395       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1396       Source<RenderWidgetHost>(this),
1397       NotificationService::NoDetails());
1398   is_unresponsive_ = true;
1399   NotifyRendererUnresponsive();
1400 }
1401
1402 void RenderWidgetHostImpl::RendererIsResponsive() {
1403   if (is_unresponsive_) {
1404     is_unresponsive_ = false;
1405     NotifyRendererResponsive();
1406   }
1407 }
1408
1409 void RenderWidgetHostImpl::ClearDisplayedGraphics() {
1410   NotifyNewContentRenderingTimeoutForTesting();
1411   if (view_)
1412     view_->ClearCompositorFrame();
1413 }
1414
1415 void RenderWidgetHostImpl::OnRenderViewReady() {
1416   SendScreenRects();
1417   WasResized();
1418 }
1419
1420 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1421   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1422   // it handles destruction.
1423   if (!owned_by_render_frame_host_) {
1424     // TODO(evanm): This synchronously ends up calling "delete this".
1425     // Is that really what we want in response to this message?  I'm matching
1426     // previous behavior of the code here.
1427     Destroy();
1428   } else {
1429     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1430   }
1431 }
1432
1433 void RenderWidgetHostImpl::OnClose() {
1434   Shutdown();
1435 }
1436
1437 void RenderWidgetHostImpl::OnSetTooltipText(
1438     const base::string16& tooltip_text,
1439     WebTextDirection text_direction_hint) {
1440   // First, add directionality marks around tooltip text if necessary.
1441   // A naive solution would be to simply always wrap the text. However, on
1442   // windows, Unicode directional embedding characters can't be displayed on
1443   // systems that lack RTL fonts and are instead displayed as empty squares.
1444   //
1445   // To get around this we only wrap the string when we deem it necessary i.e.
1446   // when the locale direction is different than the tooltip direction hint.
1447   //
1448   // Currently, we use element's directionality as the tooltip direction hint.
1449   // An alternate solution would be to set the overall directionality based on
1450   // trying to detect the directionality from the tooltip text rather than the
1451   // element direction.  One could argue that would be a preferable solution
1452   // but we use the current approach to match Fx & IE's behavior.
1453   base::string16 wrapped_tooltip_text = tooltip_text;
1454   if (!tooltip_text.empty()) {
1455     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1456       // Force the tooltip to have LTR directionality.
1457       wrapped_tooltip_text =
1458           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1459     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1460                !base::i18n::IsRTL()) {
1461       // Force the tooltip to have RTL directionality.
1462       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1463     }
1464   }
1465   if (GetView())
1466     view_->SetTooltipText(wrapped_tooltip_text);
1467 }
1468
1469 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1470   waiting_for_screen_rects_ack_ = false;
1471   if (!view_)
1472     return;
1473
1474   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1475       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1476     return;
1477   }
1478
1479   SendScreenRects();
1480 }
1481
1482 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1483   if (view_) {
1484     view_->SetBounds(pos);
1485     Send(new ViewMsg_Move_ACK(routing_id_));
1486   }
1487 }
1488
1489 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1490     const IPC::Message& message) {
1491   // This trace event is used in
1492   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1493   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1494
1495   StopNewContentRenderingTimeout();
1496
1497   ViewHostMsg_SwapCompositorFrame::Param param;
1498   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1499     return false;
1500   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1501   uint32_t output_surface_id = base::get<0>(param);
1502   base::get<1>(param).AssignTo(frame.get());
1503   std::vector<IPC::Message> messages_to_deliver_with_frame;
1504   messages_to_deliver_with_frame.swap(base::get<2>(param));
1505
1506   if (!ui::LatencyInfo::Verify(frame->metadata.latency_info,
1507                                "RenderWidgetHostImpl::OnSwapCompositorFrame")) {
1508     std::vector<ui::LatencyInfo>().swap(frame->metadata.latency_info);
1509   }
1510
1511   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1512
1513   bool is_mobile_optimized = IsMobileOptimizedFrame(frame->metadata);
1514   input_router_->NotifySiteIsMobileOptimized(is_mobile_optimized);
1515   if (touch_emulator_)
1516     touch_emulator_->SetDoubleTapSupportForPageEnabled(!is_mobile_optimized);
1517
1518   if (view_) {
1519     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1520     view_->DidReceiveRendererFrame();
1521   } else {
1522     cc::CompositorFrameAck ack;
1523     if (frame->gl_frame_data) {
1524       ack.gl_frame_data = frame->gl_frame_data.Pass();
1525       ack.gl_frame_data->sync_point = 0;
1526     } else if (frame->delegated_frame_data) {
1527       cc::TransferableResource::ReturnResources(
1528           frame->delegated_frame_data->resource_list,
1529           &ack.resources);
1530     }
1531     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1532                                process_->GetID(), ack);
1533   }
1534
1535   RenderProcessHost* rph = GetProcess();
1536   for (std::vector<IPC::Message>::const_iterator i =
1537            messages_to_deliver_with_frame.begin();
1538        i != messages_to_deliver_with_frame.end();
1539        ++i) {
1540     rph->OnMessageReceived(*i);
1541     if (i->dispatch_error())
1542       rph->OnBadMessageReceived(*i);
1543   }
1544   messages_to_deliver_with_frame.clear();
1545
1546   return true;
1547 }
1548
1549 void RenderWidgetHostImpl::OnUpdateRect(
1550     const ViewHostMsg_UpdateRect_Params& params) {
1551   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1552   TimeTicks paint_start = TimeTicks::Now();
1553
1554   // Update our knowledge of the RenderWidget's size.
1555   current_size_ = params.view_size;
1556
1557   bool is_resize_ack =
1558       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1559
1560   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1561   // that will end up reaching GetBackingStore.
1562   if (is_resize_ack) {
1563     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1564     resize_ack_pending_ = false;
1565   }
1566
1567   bool is_repaint_ack =
1568       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1569   if (is_repaint_ack) {
1570     DCHECK(repaint_ack_pending_);
1571     TRACE_EVENT_ASYNC_END0(
1572         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1573     repaint_ack_pending_ = false;
1574     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1575     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1576   }
1577
1578   DCHECK(!params.view_size.IsEmpty());
1579
1580   DidUpdateBackingStore(params, paint_start);
1581
1582   if (auto_resize_enabled_) {
1583     bool post_callback = new_auto_size_.IsEmpty();
1584     new_auto_size_ = params.view_size;
1585     if (post_callback) {
1586       base::ThreadTaskRunnerHandle::Get()->PostTask(
1587           FROM_HERE, base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1588                                 weak_factory_.GetWeakPtr()));
1589     }
1590   }
1591
1592   // Log the time delta for processing a paint message. On platforms that don't
1593   // support asynchronous painting, this is equivalent to
1594   // MPArch.RWH_TotalPaintTime.
1595   TimeDelta delta = TimeTicks::Now() - paint_start;
1596   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1597 }
1598
1599 void RenderWidgetHostImpl::DidUpdateBackingStore(
1600     const ViewHostMsg_UpdateRect_Params& params,
1601     const TimeTicks& paint_start) {
1602   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1603   TimeTicks update_start = TimeTicks::Now();
1604
1605   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1606   // will not be re-issued, so must move them now, regardless of whether we
1607   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1608   // in the process could dispatch other window messages which could cause the
1609   // view to be destroyed.
1610   if (view_)
1611     view_->MovePluginWindows(params.plugin_window_moves);
1612
1613   NotificationService::current()->Notify(
1614       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1615       Source<RenderWidgetHost>(this),
1616       NotificationService::NoDetails());
1617
1618   // We don't need to update the view if the view is hidden. We must do this
1619   // early return after the ACK is sent, however, or the renderer will not send
1620   // us more data.
1621   if (is_hidden_)
1622     return;
1623
1624   // If we got a resize ack, then perhaps we have another resize to send?
1625   bool is_resize_ack =
1626       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1627   if (is_resize_ack)
1628     WasResized();
1629
1630   // Log the time delta for processing a paint message.
1631   TimeTicks now = TimeTicks::Now();
1632   TimeDelta delta = now - update_start;
1633   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1634 }
1635
1636 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1637     const SyntheticGesturePacket& gesture_packet) {
1638   // Only allow untrustworthy gestures if explicitly enabled.
1639   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1640           cc::switches::kEnableGpuBenchmarking)) {
1641     bad_message::ReceivedBadMessage(GetProcess(),
1642                                     bad_message::RWH_SYNTHETIC_GESTURE);
1643     return;
1644   }
1645
1646   QueueSyntheticGesture(
1647         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1648         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1649                    weak_factory_.GetWeakPtr()));
1650 }
1651
1652 void RenderWidgetHostImpl::OnFocus() {
1653   // Only RenderViewHost can deal with that message.
1654   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1655 }
1656
1657 void RenderWidgetHostImpl::OnBlur() {
1658   // Only RenderViewHost can deal with that message.
1659   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1660 }
1661
1662 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1663   SetCursor(cursor);
1664 }
1665
1666 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1667     bool enabled, ui::GestureProviderConfigType config_type) {
1668   if (enabled) {
1669     if (!touch_emulator_) {
1670       touch_emulator_.reset(new TouchEmulator(
1671           this, view_ ? content::GetScaleFactorForView(view_) : 1.0f));
1672     }
1673     touch_emulator_->Enable(config_type);
1674   } else {
1675     if (touch_emulator_)
1676       touch_emulator_->Disable();
1677   }
1678 }
1679
1680 void RenderWidgetHostImpl::OnTextInputStateChanged(
1681     const ViewHostMsg_TextInputState_Params& params) {
1682   if (view_)
1683     view_->TextInputStateChanged(params);
1684 }
1685
1686 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1687     const gfx::Range& range,
1688     const std::vector<gfx::Rect>& character_bounds) {
1689   if (view_)
1690     view_->ImeCompositionRangeChanged(range, character_bounds);
1691 }
1692
1693 void RenderWidgetHostImpl::OnImeCancelComposition() {
1694   if (view_)
1695     view_->ImeCancelComposition();
1696 }
1697
1698 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1699                                        bool last_unlocked_by_target,
1700                                        bool privileged) {
1701   if (pending_mouse_lock_request_) {
1702     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1703     return;
1704   }
1705   if (IsMouseLocked()) {
1706     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1707     return;
1708   }
1709
1710   pending_mouse_lock_request_ = true;
1711   if (privileged && allow_privileged_mouse_lock_) {
1712     // Directly approve to lock the mouse.
1713     GotResponseToLockMouseRequest(true);
1714   } else {
1715     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1716   }
1717 }
1718
1719 void RenderWidgetHostImpl::OnUnlockMouse() {
1720   RejectMouseLockOrUnlockIfNecessary();
1721 }
1722
1723 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1724     const gfx::Rect& rect_pixels,
1725     const gfx::Size& size,
1726     const cc::SharedBitmapId& id) {
1727   DCHECK(!rect_pixels.IsEmpty());
1728   DCHECK(!size.IsEmpty());
1729
1730   scoped_ptr<cc::SharedBitmap> bitmap =
1731       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1732   if (!bitmap) {
1733     bad_message::ReceivedBadMessage(GetProcess(),
1734                                     bad_message::RWH_SHARED_BITMAP);
1735     return;
1736   }
1737
1738   DCHECK(bitmap->pixels());
1739
1740   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1741   SkBitmap zoomed_bitmap;
1742   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1743
1744   // Note that |rect| is in coordinates of pixels relative to the window origin.
1745   // Aura-based systems will want to convert this to DIPs.
1746   if (view_)
1747     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1748
1749   // It is assumed that the disambiguation popup will make a copy of the
1750   // provided zoomed image, so we delete this one.
1751   zoomed_bitmap.setPixels(0);
1752   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1753 }
1754
1755 #if defined(OS_WIN)
1756 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1757     gfx::NativeViewId dummy_activation_window) {
1758   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1759
1760   // This may happen as a result of a race condition when the plugin is going
1761   // away.
1762   wchar_t window_title[MAX_PATH + 1] = {0};
1763   if (!IsWindow(hwnd) ||
1764       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1765       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1766     return;
1767   }
1768
1769 #if defined(USE_AURA)
1770   SetParent(hwnd,
1771             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1772 #else
1773   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1774 #endif
1775   dummy_windows_for_activation_.push_back(hwnd);
1776 }
1777
1778 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1779     gfx::NativeViewId dummy_activation_window) {
1780   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1781   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1782   for (; i != dummy_windows_for_activation_.end(); ++i) {
1783     if ((*i) == hwnd) {
1784       dummy_windows_for_activation_.erase(i);
1785       return;
1786     }
1787   }
1788   NOTREACHED() << "Unknown dummy window";
1789 }
1790 #endif
1791
1792 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1793   ignore_input_events_ = ignore_input_events;
1794 }
1795
1796 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1797     const NativeWebKeyboardEvent& event) {
1798   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1799     return false;
1800
1801   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1802     size_t original_size = key_press_event_callbacks_.size();
1803     if (key_press_event_callbacks_[i].Run(event))
1804       return true;
1805
1806     // Check whether the callback that just ran removed itself, in which case
1807     // the iterator needs to be decremented to properly account for the removal.
1808     size_t current_size = key_press_event_callbacks_.size();
1809     if (current_size != original_size) {
1810       DCHECK_EQ(original_size - 1, current_size);
1811       --i;
1812     }
1813   }
1814
1815   return false;
1816 }
1817
1818 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1819     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1820   // Don't ignore touch cancel events, since they may be sent while input
1821   // events are being ignored in order to keep the renderer from getting
1822   // confused about how many touches are active.
1823   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1824     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1825
1826   if (!process_->HasConnection())
1827     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1828
1829   if (event.type == WebInputEvent::MouseDown ||
1830       event.type == WebInputEvent::GestureTapDown) {
1831     OnUserGesture();
1832   }
1833
1834   return view_ ? view_->FilterInputEvent(event)
1835                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1836 }
1837
1838 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1839   increment_in_flight_event_count();
1840   if (!is_hidden_)
1841     StartHangMonitorTimeout(hung_renderer_delay_);
1842 }
1843
1844 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1845   if (decrement_in_flight_event_count() <= 0) {
1846     // Cancel pending hung renderer checks since the renderer is responsive.
1847     StopHangMonitorTimeout();
1848   } else {
1849     // The renderer is responsive, but there are in-flight events to wait for.
1850     if (!is_hidden_)
1851       RestartHangMonitorTimeout();
1852   }
1853 }
1854
1855 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1856   has_touch_handler_ = has_handlers;
1857 }
1858
1859 void RenderWidgetHostImpl::DidFlush() {
1860   if (synthetic_gesture_controller_)
1861     synthetic_gesture_controller_->OnDidFlushInput();
1862 }
1863
1864 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1865   if (view_)
1866     view_->DidOverscroll(params);
1867 }
1868
1869 void RenderWidgetHostImpl::DidStopFlinging() {
1870   if (view_)
1871     view_->DidStopFlinging();
1872 }
1873
1874 void RenderWidgetHostImpl::OnKeyboardEventAck(
1875       const NativeWebKeyboardEventWithLatencyInfo& event,
1876       InputEventAckState ack_result) {
1877   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1878
1879 #if defined(OS_MACOSX)
1880   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event.event))
1881     return;
1882 #endif
1883
1884   // We only send unprocessed key event upwards if we are not hidden,
1885   // because the user has moved away from us and no longer expect any effect
1886   // of this key event.
1887   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1888   if (delegate_ && !processed && !is_hidden() && !event.event.skip_in_browser) {
1889     delegate_->HandleKeyboardEvent(event.event);
1890
1891     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1892     // (i.e.  in the case of Ctrl+W, where the call to
1893     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1894   }
1895 }
1896
1897 void RenderWidgetHostImpl::OnMouseEventAck(
1898     const MouseEventWithLatencyInfo& mouse_event,
1899     InputEventAckState ack_result) {
1900   latency_tracker_.OnInputEventAck(mouse_event.event, &mouse_event.latency);
1901 }
1902
1903 void RenderWidgetHostImpl::OnWheelEventAck(
1904     const MouseWheelEventWithLatencyInfo& wheel_event,
1905     InputEventAckState ack_result) {
1906   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1907
1908   if (!is_hidden() && view_) {
1909     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1910         delegate_->HandleWheelEvent(wheel_event.event)) {
1911       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1912     }
1913     view_->WheelEventAck(wheel_event.event, ack_result);
1914   }
1915 }
1916
1917 void RenderWidgetHostImpl::OnGestureEventAck(
1918     const GestureEventWithLatencyInfo& event,
1919     InputEventAckState ack_result) {
1920   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1921
1922   if (view_)
1923     view_->GestureEventAck(event.event, ack_result);
1924 }
1925
1926 void RenderWidgetHostImpl::OnTouchEventAck(
1927     const TouchEventWithLatencyInfo& event,
1928     InputEventAckState ack_result) {
1929   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1930
1931   if (touch_emulator_ &&
1932       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1933     return;
1934   }
1935
1936   if (view_)
1937     view_->ProcessAckedTouchEvent(event, ack_result);
1938 }
1939
1940 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1941   if (type == BAD_ACK_MESSAGE) {
1942     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1943   } else if (type == UNEXPECTED_EVENT_TYPE) {
1944     suppress_next_char_events_ = false;
1945   }
1946 }
1947
1948 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1949     SyntheticGesture::Result result) {
1950   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1951 }
1952
1953 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1954   return ignore_input_events_ || process_->IgnoreInputEvents();
1955 }
1956
1957 void RenderWidgetHostImpl::StartUserGesture() {
1958   OnUserGesture();
1959 }
1960
1961 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1962   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1963 }
1964
1965 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1966     const std::vector<EditCommand>& commands) {
1967   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1968 }
1969
1970 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1971                                               const std::string& value) {
1972   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1973 }
1974
1975 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1976     const gfx::Rect& rect) {
1977   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1978 }
1979
1980 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1981   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1982 }
1983
1984 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1985   if (!allowed) {
1986     RejectMouseLockOrUnlockIfNecessary();
1987     return false;
1988   }
1989
1990   if (!pending_mouse_lock_request_) {
1991     // This is possible, e.g., the plugin sends us an unlock request before
1992     // the user allows to lock to mouse.
1993     return false;
1994   }
1995
1996   pending_mouse_lock_request_ = false;
1997   if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1998     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1999     return false;
2000   }
2001
2002   Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
2003   return true;
2004 }
2005
2006 // static
2007 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
2008     int32_t route_id,
2009     uint32_t output_surface_id,
2010     int renderer_host_id,
2011     const cc::CompositorFrameAck& ack) {
2012   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2013   if (!host)
2014     return;
2015   host->Send(new ViewMsg_SwapCompositorFrameAck(
2016       route_id, output_surface_id, ack));
2017 }
2018
2019 // static
2020 void RenderWidgetHostImpl::SendReclaimCompositorResources(
2021     int32_t route_id,
2022     uint32_t output_surface_id,
2023     int renderer_host_id,
2024     const cc::CompositorFrameAck& ack) {
2025   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2026   if (!host)
2027     return;
2028   host->Send(
2029       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
2030 }
2031
2032 void RenderWidgetHostImpl::DelayedAutoResized() {
2033   gfx::Size new_size = new_auto_size_;
2034   // Clear the new_auto_size_ since the empty value is used as a flag to
2035   // indicate that no callback is in progress (i.e. without this line
2036   // DelayedAutoResized will not get called again).
2037   new_auto_size_.SetSize(0, 0);
2038   if (!auto_resize_enabled_)
2039     return;
2040
2041   OnRenderAutoResized(new_size);
2042 }
2043
2044 void RenderWidgetHostImpl::DetachDelegate() {
2045   delegate_ = NULL;
2046 }
2047
2048 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
2049   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2050   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2051                                GetLatencyComponentId(),
2052                                &window_snapshot_component)) {
2053     int sequence_number = static_cast<int>(
2054         window_snapshot_component.sequence_number);
2055 #if defined(OS_MACOSX)
2056     // On Mac, when using CoreAnmation, there is a delay between when content
2057     // is drawn to the screen, and when the snapshot will actually pick up
2058     // that content. Insert a manual delay of 1/6th of a second (to simulate
2059     // 10 frames at 60 fps) before actually taking the snapshot.
2060     base::MessageLoop::current()->PostDelayedTask(
2061         FROM_HERE,
2062         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2063                    weak_factory_.GetWeakPtr(),
2064                    sequence_number),
2065         base::TimeDelta::FromSecondsD(1. / 6));
2066 #else
2067     WindowSnapshotReachedScreen(sequence_number);
2068 #endif
2069   }
2070
2071   latency_tracker_.OnFrameSwapped(latency_info);
2072 }
2073
2074 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2075   view_->DidReceiveRendererFrame();
2076 }
2077
2078 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2079   DCHECK(base::MessageLoopForUI::IsCurrent());
2080
2081   gfx::Rect view_bounds = GetView()->GetViewBounds();
2082   gfx::Rect snapshot_bounds(view_bounds.size());
2083
2084   std::vector<unsigned char> png;
2085   if (ui::GrabViewSnapshot(
2086       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2087     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2088     return;
2089   }
2090
2091   ui::GrabViewSnapshotAsync(
2092       GetView()->GetNativeView(),
2093       snapshot_bounds,
2094       base::ThreadTaskRunnerHandle::Get(),
2095       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2096                  weak_factory_.GetWeakPtr(),
2097                  snapshot_id));
2098 }
2099
2100 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2101                                                   const unsigned char* data,
2102                                                   size_t size) {
2103   // Any pending snapshots with a lower ID than the one received are considered
2104   // to be implicitly complete, and returned the same snapshot data.
2105   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2106   while (it != pending_browser_snapshots_.end()) {
2107       if (it->first <= snapshot_id) {
2108         it->second.Run(data, size);
2109         pending_browser_snapshots_.erase(it++);
2110       } else {
2111         ++it;
2112       }
2113   }
2114 }
2115
2116 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2117     int snapshot_id,
2118     scoped_refptr<base::RefCountedBytes> png_data) {
2119   if (png_data.get())
2120     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2121   else
2122     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2123 }
2124
2125 // static
2126 void RenderWidgetHostImpl::CompositorFrameDrawn(
2127     const std::vector<ui::LatencyInfo>& latency_info) {
2128   for (size_t i = 0; i < latency_info.size(); i++) {
2129     std::set<RenderWidgetHostImpl*> rwhi_set;
2130     for (const auto& lc : latency_info[i].latency_components()) {
2131       if (lc.first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2132           lc.first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2133           lc.first.first == ui::TAB_SHOW_COMPONENT) {
2134         // Matches with GetLatencyComponentId
2135         int routing_id = lc.first.second & 0xffffffff;
2136         int process_id = (lc.first.second >> 32) & 0xffffffff;
2137         RenderWidgetHost* rwh =
2138             RenderWidgetHost::FromID(process_id, routing_id);
2139         if (!rwh) {
2140           continue;
2141         }
2142         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2143         if (rwhi_set.insert(rwhi).second)
2144           rwhi->FrameSwapped(latency_info[i]);
2145       }
2146     }
2147   }
2148 }
2149
2150 BrowserAccessibilityManager*
2151     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2152   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2153 }
2154
2155 BrowserAccessibilityManager*
2156     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2157   return delegate_ ?
2158       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2159 }
2160
2161 #if defined(OS_WIN)
2162 gfx::NativeViewAccessible
2163     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2164   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2165 }
2166 #endif
2167
2168 }  // namespace content