content/renderer/render_widget.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/renderer/render_widget.h"
   6
   7 #include "base/auto_reset.h"
   8 #include "base/bind.h"
   9 #include "base/command_line.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/singleton.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/stl_util.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "base/sys_info.h"
  18 #include "base/trace_event/trace_event.h"
  19 #include "base/trace_event/trace_event_synthetic_delay.h"
  20 #include "build/build_config.h"
  21 #include "cc/base/switches.h"
  22 #include "cc/debug/benchmark_instrumentation.h"
  23 #include "cc/output/output_surface.h"
  24 #include "cc/trees/layer_tree_host.h"
  25 #include "components/scheduler/renderer/renderer_scheduler.h"
  26 #include "content/child/npapi/webplugin.h"
  27 #include "content/common/gpu/client/context_provider_command_buffer.h"
  28 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  29 #include "content/common/gpu/gpu_process_launch_causes.h"
  30 #include "content/common/input/synthetic_gesture_packet.h"
  31 #include "content/common/input/web_input_event_traits.h"
  32 #include "content/common/input_messages.h"
  33 #include "content/common/swapped_out_messages.h"
  34 #include "content/common/view_messages.h"
  35 #include "content/public/common/content_switches.h"
  36 #include "content/public/common/context_menu_params.h"
  37 #include "content/renderer/cursor_utils.h"
  38 #include "content/renderer/external_popup_menu.h"
  39 #include "content/renderer/gpu/compositor_output_surface.h"
  40 #include "content/renderer/gpu/delegated_compositor_output_surface.h"
  41 #include "content/renderer/gpu/frame_swap_message_queue.h"
  42 #include "content/renderer/gpu/mailbox_output_surface.h"
  43 #include "content/renderer/gpu/queue_message_swap_promise.h"
  44 #include "content/renderer/gpu/render_widget_compositor.h"
  45 #include "content/renderer/ime_event_guard.h"
  46 #include "content/renderer/input/input_handler_manager.h"
  47 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
  48 #include "content/renderer/render_frame_impl.h"
  49 #include "content/renderer/render_frame_proxy.h"
  50 #include "content/renderer/render_process.h"
  51 #include "content/renderer/render_thread_impl.h"
  52 #include "content/renderer/renderer_blink_platform_impl.h"
  53 #include "content/renderer/resizing_mode_selector.h"
  54 #include "ipc/ipc_sync_message.h"
  55 #include "skia/ext/platform_canvas.h"
  56 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
  57 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
  58 #include "third_party/WebKit/public/platform/WebPoint.h"
  59 #include "third_party/WebKit/public/platform/WebRect.h"
  60 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
  61 #include "third_party/WebKit/public/platform/WebSize.h"
  62 #include "third_party/WebKit/public/platform/WebString.h"
  63 #include "third_party/WebKit/public/web/WebDeviceEmulationParams.h"
  64 #include "third_party/WebKit/public/web/WebFrameWidget.h"
  65 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  66 #include "third_party/WebKit/public/web/WebNode.h"
  67 #include "third_party/WebKit/public/web/WebPagePopup.h"
  68 #include "third_party/WebKit/public/web/WebPopupMenuInfo.h"
  69 #include "third_party/WebKit/public/web/WebRange.h"
  70 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  71 #include "third_party/WebKit/public/web/WebView.h"
  72 #include "third_party/skia/include/core/SkShader.h"
  73 #include "ui/base/ui_base_switches.h"
  74 #include "ui/gfx/geometry/point_conversions.h"
  75 #include "ui/gfx/geometry/rect_conversions.h"
  76 #include "ui/gfx/geometry/size_conversions.h"
  77 #include "ui/gfx/skia_util.h"
  78 #include "ui/gl/gl_switches.h"
  79 #include "ui/surface/transport_dib.h"
  80
  81 #if defined(OS_ANDROID)
  82 #include <android/keycodes.h>
  83 #include "content/renderer/android/synchronous_compositor_factory.h"
  84 #endif
  85
  86 #if defined(OS_POSIX)
  87 #include "ipc/ipc_channel_posix.h"
  88 #include "third_party/skia/include/core/SkMallocPixelRef.h"
  89 #include "third_party/skia/include/core/SkPixelRef.h"
  90 #endif  // defined(OS_POSIX)
  91
  92 #include "third_party/WebKit/public/web/WebWidget.h"
  93
  94 using blink::WebCompositionUnderline;
  95 using blink::WebCursorInfo;
  96 using blink::WebDeviceEmulationParams;
  97 using blink::WebGestureEvent;
  98 using blink::WebInputEvent;
  99 using blink::WebKeyboardEvent;
 100 using blink::WebMouseEvent;
 101 using blink::WebMouseWheelEvent;
 102 using blink::WebNavigationPolicy;
 103 using blink::WebNode;
 104 using blink::WebPagePopup;
 105 using blink::WebPoint;
 106 using blink::WebPopupType;
 107 using blink::WebRange;
 108 using blink::WebRect;
 109 using blink::WebScreenInfo;
 110 using blink::WebSize;
 111 using blink::WebTextDirection;
 112 using blink::WebTouchEvent;
 113 using blink::WebTouchPoint;
 114 using blink::WebVector;
 115 using blink::WebWidget;
 116
 117 namespace {
 118
 119 typedef std::map<std::string, ui::TextInputMode> TextInputModeMap;
 120
 121 class TextInputModeMapSingleton {
 122  public:
 123   static TextInputModeMapSingleton* GetInstance() {
 124     return Singleton<TextInputModeMapSingleton>::get();
 125   }
 126   TextInputModeMapSingleton() {
 127     map_["verbatim"] = ui::TEXT_INPUT_MODE_VERBATIM;
 128     map_["latin"] = ui::TEXT_INPUT_MODE_LATIN;
 129     map_["latin-name"] = ui::TEXT_INPUT_MODE_LATIN_NAME;
 130     map_["latin-prose"] = ui::TEXT_INPUT_MODE_LATIN_PROSE;
 131     map_["full-width-latin"] = ui::TEXT_INPUT_MODE_FULL_WIDTH_LATIN;
 132     map_["kana"] = ui::TEXT_INPUT_MODE_KANA;
 133     map_["katakana"] = ui::TEXT_INPUT_MODE_KATAKANA;
 134     map_["numeric"] = ui::TEXT_INPUT_MODE_NUMERIC;
 135     map_["tel"] = ui::TEXT_INPUT_MODE_TEL;
 136     map_["email"] = ui::TEXT_INPUT_MODE_EMAIL;
 137     map_["url"] = ui::TEXT_INPUT_MODE_URL;
 138   }
 139   const TextInputModeMap& map() const { return map_; }
 140  private:
 141   TextInputModeMap map_;
 142
 143   friend struct DefaultSingletonTraits<TextInputModeMapSingleton>;
 144
 145   DISALLOW_COPY_AND_ASSIGN(TextInputModeMapSingleton);
 146 };
 147
 148 ui::TextInputMode ConvertInputMode(const blink::WebString& input_mode) {
 149   static TextInputModeMapSingleton* singleton =
 150       TextInputModeMapSingleton::GetInstance();
 151   TextInputModeMap::const_iterator it =
 152       singleton->map().find(input_mode.utf8());
 153   if (it == singleton->map().end())
 154     return ui::TEXT_INPUT_MODE_DEFAULT;
 155   return it->second;
 156 }
 157
 158 // TODO(brianderson): Replace the hard-coded threshold with a fraction of
 159 // the BeginMainFrame interval.
 160 // 4166us will allow 1/4 of a 60Hz interval or 1/2 of a 120Hz interval to
 161 // be spent in input hanlders before input starts getting throttled.
 162 const int kInputHandlingTimeThrottlingThresholdMicroseconds = 4166;
 163
 164 int64 GetEventLatencyMicros(const WebInputEvent& event, base::TimeTicks now) {
 165   return (now - base::TimeDelta::FromSecondsD(event.timeStampSeconds))
 166       .ToInternalValue();
 167 }
 168
 169 void LogInputEventLatencyUma(const WebInputEvent& event, base::TimeTicks now) {
 170   UMA_HISTOGRAM_CUSTOM_COUNTS(
 171       "Event.AggregatedLatency.Renderer2",
 172       GetEventLatencyMicros(event, now),
 173       1,
 174       10000000,
 175       100);
 176
 177 #define CASE_TYPE(t) \
 178     case WebInputEvent::t: \
 179       UMA_HISTOGRAM_CUSTOM_COUNTS( \
 180           "Event.Latency.Renderer2." #t, \
 181           GetEventLatencyMicros(event, now), \
 182           1, \
 183           10000000, \
 184           100); \
 185       break;
 186
 187   switch(event.type) {
 188     CASE_TYPE(Undefined);
 189     CASE_TYPE(MouseDown);
 190     CASE_TYPE(MouseUp);
 191     CASE_TYPE(MouseMove);
 192     CASE_TYPE(MouseEnter);
 193     CASE_TYPE(MouseLeave);
 194     CASE_TYPE(ContextMenu);
 195     CASE_TYPE(MouseWheel);
 196     CASE_TYPE(RawKeyDown);
 197     CASE_TYPE(KeyDown);
 198     CASE_TYPE(KeyUp);
 199     CASE_TYPE(Char);
 200     CASE_TYPE(GestureScrollBegin);
 201     CASE_TYPE(GestureScrollEnd);
 202     CASE_TYPE(GestureScrollUpdate);
 203     CASE_TYPE(GestureFlingStart);
 204     CASE_TYPE(GestureFlingCancel);
 205     CASE_TYPE(GestureShowPress);
 206     CASE_TYPE(GestureTap);
 207     CASE_TYPE(GestureTapUnconfirmed);
 208     CASE_TYPE(GestureTapDown);
 209     CASE_TYPE(GestureTapCancel);
 210     CASE_TYPE(GestureDoubleTap);
 211     CASE_TYPE(GestureTwoFingerTap);
 212     CASE_TYPE(GestureLongPress);
 213     CASE_TYPE(GestureLongTap);
 214     CASE_TYPE(GesturePinchBegin);
 215     CASE_TYPE(GesturePinchEnd);
 216     CASE_TYPE(GesturePinchUpdate);
 217     CASE_TYPE(TouchStart);
 218     CASE_TYPE(TouchMove);
 219     CASE_TYPE(TouchEnd);
 220     CASE_TYPE(TouchCancel);
 221     default:
 222       // Must include default to let blink::WebInputEvent add new event types
 223       // before they're added here.
 224       DLOG(WARNING) << "Unhandled WebInputEvent type: " << event.type;
 225       break;
 226   }
 227
 228 #undef CASE_TYPE
 229 }
 230
 231 }  // namespace
 232
 233 namespace content {
 234
 235 // RenderWidget::ScreenMetricsEmulator ----------------------------------------
 236
 237 class RenderWidget::ScreenMetricsEmulator {
 238  public:
 239   ScreenMetricsEmulator(
 240       RenderWidget* widget,
 241       const WebDeviceEmulationParams& params);
 242   virtual ~ScreenMetricsEmulator();
 243
 244   // Scale and offset used to convert between host coordinates
 245   // and webwidget coordinates.
 246   float scale() { return scale_; }
 247   gfx::PointF offset() { return offset_; }
 248   gfx::Rect applied_widget_rect() const { return applied_widget_rect_; }
 249   gfx::Rect original_screen_rect() const { return original_view_screen_rect_; }
 250   const WebScreenInfo& original_screen_info() { return original_screen_info_; }
 251
 252   void ChangeEmulationParams(
 253       const WebDeviceEmulationParams& params);
 254
 255   // The following methods alter handlers' behavior for messages related to
 256   // widget size and position.
 257   void OnResizeMessage(const ViewMsg_Resize_Params& params);
 258   void OnUpdateScreenRectsMessage(const gfx::Rect& view_screen_rect,
 259                                   const gfx::Rect& window_screen_rect);
 260   void OnShowContextMenu(ContextMenuParams* params);
 261   gfx::Rect AdjustValidationMessageAnchor(const gfx::Rect& anchor);
 262
 263  private:
 264   void Reapply();
 265   void Apply(bool top_controls_shrink_blink_size,
 266              float top_controls_height,
 267              gfx::Rect resizer_rect,
 268              bool is_fullscreen_granted,
 269              blink::WebDisplayMode display_mode);
 270
 271   RenderWidget* widget_;
 272
 273   // Parameters as passed by RenderWidget::EnableScreenMetricsEmulation.
 274   WebDeviceEmulationParams params_;
 275
 276   // The computed scale and offset used to fit widget into browser window.
 277   float scale_;
 278   gfx::PointF offset_;
 279
 280   // Widget rect as passed to webwidget.
 281   gfx::Rect applied_widget_rect_;
 282
 283   // Original values to restore back after emulation ends.
 284   gfx::Size original_size_;
 285   gfx::Size original_physical_backing_size_;
 286   gfx::Size original_visible_viewport_size_;
 287   blink::WebScreenInfo original_screen_info_;
 288   gfx::Rect original_view_screen_rect_;
 289   gfx::Rect original_window_screen_rect_;
 290 };
 291
 292 RenderWidget::ScreenMetricsEmulator::ScreenMetricsEmulator(
 293     RenderWidget* widget,
 294     const WebDeviceEmulationParams& params)
 295     : widget_(widget),
 296       params_(params),
 297       scale_(1.f) {
 298   original_size_ = widget_->size_;
 299   original_physical_backing_size_ = widget_->physical_backing_size_;
 300   original_visible_viewport_size_ = widget_->visible_viewport_size_;
 301   original_screen_info_ = widget_->screen_info_;
 302   original_view_screen_rect_ = widget_->view_screen_rect_;
 303   original_window_screen_rect_ = widget_->window_screen_rect_;
 304   Apply(widget_->top_controls_shrink_blink_size_,
 305         widget_->top_controls_height_,
 306         widget_->resizer_rect_,
 307         widget_->is_fullscreen_granted_,
 308         widget_->display_mode_);
 309 }
 310
 311 RenderWidget::ScreenMetricsEmulator::~ScreenMetricsEmulator() {
 312   widget_->screen_info_ = original_screen_info_;
 313
 314   widget_->SetDeviceScaleFactor(original_screen_info_.deviceScaleFactor);
 315   widget_->SetScreenMetricsEmulationParameters(false, params_);
 316   widget_->view_screen_rect_ = original_view_screen_rect_;
 317   widget_->window_screen_rect_ = original_window_screen_rect_;
 318   widget_->Resize(original_size_,
 319                   original_physical_backing_size_,
 320                   widget_->top_controls_shrink_blink_size_,
 321                   widget_->top_controls_height_,
 322                   original_visible_viewport_size_,
 323                   widget_->resizer_rect_,
 324                   widget_->is_fullscreen_granted_,
 325                   widget_->display_mode_,
 326                   NO_RESIZE_ACK);
 327 }
 328
 329 void RenderWidget::ScreenMetricsEmulator::ChangeEmulationParams(
 330     const WebDeviceEmulationParams& params) {
 331   params_ = params;
 332   Reapply();
 333 }
 334
 335 void RenderWidget::ScreenMetricsEmulator::Reapply() {
 336   Apply(widget_->top_controls_shrink_blink_size_,
 337         widget_->top_controls_height_,
 338         widget_->resizer_rect_,
 339         widget_->is_fullscreen_granted_,
 340         widget_->display_mode_);
 341 }
 342
 343 void RenderWidget::ScreenMetricsEmulator::Apply(
 344     bool top_controls_shrink_blink_size,
 345     float top_controls_height,
 346     gfx::Rect resizer_rect,
 347     bool is_fullscreen_granted,
 348     blink::WebDisplayMode display_mode) {
 349   applied_widget_rect_.set_size(gfx::Size(params_.viewSize));
 350   if (!applied_widget_rect_.width())
 351     applied_widget_rect_.set_width(original_size_.width());
 352   if (!applied_widget_rect_.height())
 353     applied_widget_rect_.set_height(original_size_.height());
 354
 355   if (params_.fitToView && !original_size_.IsEmpty()) {
 356     int original_width = std::max(original_size_.width(), 1);
 357     int original_height = std::max(original_size_.height(), 1);
 358     float width_ratio =
 359         static_cast<float>(applied_widget_rect_.width()) / original_width;
 360     float height_ratio =
 361         static_cast<float>(applied_widget_rect_.height()) / original_height;
 362     float ratio = std::max(1.0f, std::max(width_ratio, height_ratio));
 363     scale_ = 1.f / ratio;
 364
 365     // Center emulated view inside available view space.
 366     offset_.set_x(
 367         (original_size_.width() - scale_ * applied_widget_rect_.width()) / 2);
 368     offset_.set_y(
 369         (original_size_.height() - scale_ * applied_widget_rect_.height()) / 2);
 370   } else {
 371     scale_ = params_.scale;
 372     offset_.SetPoint(params_.offset.x, params_.offset.y);
 373   }
 374
 375   if (params_.screenPosition == WebDeviceEmulationParams::Desktop) {
 376     applied_widget_rect_.set_origin(original_view_screen_rect_.origin());
 377     widget_->screen_info_.rect = original_screen_info_.rect;
 378     widget_->screen_info_.availableRect = original_screen_info_.availableRect;
 379     widget_->window_screen_rect_ = original_window_screen_rect_;
 380   } else {
 381     applied_widget_rect_.set_origin(params_.viewPosition);
 382     gfx::Rect screen_rect = applied_widget_rect_;
 383     if (!params_.screenSize.isEmpty()) {
 384       screen_rect =
 385           gfx::Rect(0, 0, params_.screenSize.width, params_.screenSize.height);
 386     }
 387     widget_->screen_info_.rect = screen_rect;
 388     widget_->screen_info_.availableRect = screen_rect;
 389     widget_->window_screen_rect_ = applied_widget_rect_;
 390   }
 391
 392   float applied_device_scale_factor = params_.deviceScaleFactor ?
 393       params_.deviceScaleFactor : original_screen_info_.deviceScaleFactor;
 394   widget_->screen_info_.deviceScaleFactor = applied_device_scale_factor;
 395
 396   // Pass three emulation parameters to the blink side:
 397   // - we keep the real device scale factor in compositor to produce sharp image
 398   //   even when emulating different scale factor;
 399   // - in order to fit into view, WebView applies offset and scale to the
 400   //   root layer.
 401   blink::WebDeviceEmulationParams modified_params = params_;
 402   modified_params.deviceScaleFactor = original_screen_info_.deviceScaleFactor;
 403   modified_params.offset = blink::WebFloatPoint(offset_.x(), offset_.y());
 404   modified_params.scale = scale_;
 405   widget_->SetScreenMetricsEmulationParameters(true, modified_params);
 406
 407   widget_->SetDeviceScaleFactor(applied_device_scale_factor);
 408   widget_->view_screen_rect_ = applied_widget_rect_;
 409
 410   gfx::Size physical_backing_size = gfx::ToCeiledSize(gfx::ScaleSize(
 411       original_size_, original_screen_info_.deviceScaleFactor));
 412   widget_->Resize(applied_widget_rect_.size(),
 413                   physical_backing_size,
 414                   top_controls_shrink_blink_size,
 415                   top_controls_height,
 416                   applied_widget_rect_.size(),
 417                   resizer_rect,
 418                   is_fullscreen_granted,
 419                   display_mode,
 420                   NO_RESIZE_ACK);
 421 }
 422
 423 void RenderWidget::ScreenMetricsEmulator::OnResizeMessage(
 424     const ViewMsg_Resize_Params& params) {
 425   bool need_ack = params.new_size != original_size_ &&
 426       !params.new_size.IsEmpty() && !params.physical_backing_size.IsEmpty();
 427   original_size_ = params.new_size;
 428   original_physical_backing_size_ = params.physical_backing_size;
 429   original_screen_info_ = params.screen_info;
 430   original_visible_viewport_size_ = params.visible_viewport_size;
 431   Apply(params.top_controls_shrink_blink_size,
 432         params.top_controls_height,
 433         params.resizer_rect,
 434         params.is_fullscreen_granted,
 435         params.display_mode);
 436
 437   if (need_ack) {
 438     widget_->set_next_paint_is_resize_ack();
 439     if (widget_->compositor_)
 440       widget_->compositor_->SetNeedsRedrawRect(gfx::Rect(widget_->size_));
 441   }
 442 }
 443
 444 void RenderWidget::ScreenMetricsEmulator::OnUpdateScreenRectsMessage(
 445     const gfx::Rect& view_screen_rect,
 446     const gfx::Rect& window_screen_rect) {
 447   original_view_screen_rect_ = view_screen_rect;
 448   original_window_screen_rect_ = window_screen_rect;
 449   if (params_.screenPosition == WebDeviceEmulationParams::Desktop)
 450     Reapply();
 451 }
 452
 453 void RenderWidget::ScreenMetricsEmulator::OnShowContextMenu(
 454     ContextMenuParams* params) {
 455   params->x *= scale_;
 456   params->x += offset_.x();
 457   params->y *= scale_;
 458   params->y += offset_.y();
 459 }
 460
 461 gfx::Rect RenderWidget::ScreenMetricsEmulator::AdjustValidationMessageAnchor(
 462     const gfx::Rect& anchor) {
 463   gfx::Rect scaled = gfx::ToEnclosedRect(gfx::ScaleRect(anchor, scale_));
 464   scaled.set_x(scaled.x() + offset_.x());
 465   scaled.set_y(scaled.y() + offset_.y());
 466   return scaled;
 467 }
 468
 469 // RenderWidget ---------------------------------------------------------------
 470
 471 RenderWidget::RenderWidget(CompositorDependencies* compositor_deps,
 472                            blink::WebPopupType popup_type,
 473                            const blink::WebScreenInfo& screen_info,
 474                            bool swapped_out,
 475                            bool hidden,
 476                            bool never_visible)
 477     : routing_id_(MSG_ROUTING_NONE),
 478       surface_id_(0),
 479       compositor_deps_(compositor_deps),
 480       webwidget_(nullptr),
 481       opener_id_(MSG_ROUTING_NONE),
 482       init_complete_(false),
 483       top_controls_shrink_blink_size_(false),
 484       top_controls_height_(0.f),
 485       next_paint_flags_(0),
 486       auto_resize_mode_(false),
 487       need_update_rect_for_auto_resize_(false),
 488       did_show_(false),
 489       is_hidden_(hidden),
 490       never_visible_(never_visible),
 491       is_fullscreen_granted_(false),
 492       display_mode_(blink::WebDisplayModeUndefined),
 493       has_focus_(false),
 494       handling_input_event_(false),
 495       handling_event_overscroll_(nullptr),
 496       handling_ime_event_(false),
 497       handling_event_type_(WebInputEvent::Undefined),
 498       ignore_ack_for_mouse_move_from_debugger_(false),
 499       closing_(false),
 500       host_closing_(false),
 501       is_swapped_out_(swapped_out),
 502       for_oopif_(false),
 503       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
 504       text_input_mode_(ui::TEXT_INPUT_MODE_DEFAULT),
 505       text_input_flags_(0),
 506       can_compose_inline_(true),
 507       popup_type_(popup_type),
 508       pending_window_rect_count_(0),
 509       suppress_next_char_events_(false),
 510       screen_info_(screen_info),
 511       device_scale_factor_(screen_info_.deviceScaleFactor),
 512       next_output_surface_id_(0),
 513 #if defined(OS_ANDROID)
 514       text_field_is_dirty_(false),
 515       body_background_color_(SK_ColorWHITE),
 516 #endif
 517       popup_origin_scale_for_emulation_(0.f),
 518       frame_swap_message_queue_(new FrameSwapMessageQueue()),
 519       resizing_mode_selector_(new ResizingModeSelector()),
 520       context_menu_source_type_(ui::MENU_SOURCE_MOUSE),
 521       has_host_context_menu_location_(false) {
 522   if (!swapped_out)
 523     RenderProcess::current()->AddRefProcess();
 524   DCHECK(RenderThread::Get());
 525   device_color_profile_.push_back('0');
 526 #if defined(OS_ANDROID)
 527   text_input_info_history_.push_back(blink::WebTextInputInfo());
 528 #endif
 529 }
 530
 531 RenderWidget::~RenderWidget() {
 532   DCHECK(!webwidget_) << "Leaking our WebWidget!";
 533
 534   // If we are swapped out, we have released already.
 535   if (!is_swapped_out_ && RenderProcess::current())
 536     RenderProcess::current()->ReleaseProcess();
 537 }
 538
 539 // static
 540 RenderWidget* RenderWidget::Create(int32 opener_id,
 541                                    CompositorDependencies* compositor_deps,
 542                                    blink::WebPopupType popup_type,
 543                                    const blink::WebScreenInfo& screen_info) {
 544   DCHECK(opener_id != MSG_ROUTING_NONE);
 545   scoped_refptr<RenderWidget> widget(new RenderWidget(
 546       compositor_deps, popup_type, screen_info, false, false, false));
 547   if (widget->Init(opener_id)) {  // adds reference on success.
 548     return widget.get();
 549   }
 550   return NULL;
 551 }
 552
 553 // static
 554 RenderWidget* RenderWidget::CreateForFrame(
 555     int routing_id,
 556     int surface_id,
 557     bool hidden,
 558     const blink::WebScreenInfo& screen_info,
 559     CompositorDependencies* compositor_deps,
 560     blink::WebLocalFrame* frame) {
 561   CHECK_NE(routing_id, MSG_ROUTING_NONE);
 562   scoped_refptr<RenderWidget> widget(
 563       new RenderWidget(compositor_deps, blink::WebPopupTypeNone, screen_info,
 564                        false, hidden, false));
 565   widget->routing_id_ = routing_id;
 566   widget->surface_id_ = surface_id;
 567   widget->for_oopif_ = true;
 568   // DoInit increments the reference count on |widget|, keeping it alive after
 569   // this function returns.
 570   if (widget->DoInit(MSG_ROUTING_NONE,
 571                      RenderWidget::CreateWebFrameWidget(widget.get(), frame),
 572                      nullptr)) {
 573     widget->CompleteInit();
 574     return widget.get();
 575   }
 576   return nullptr;
 577 }
 578
 579 // static
 580 blink::WebWidget* RenderWidget::CreateWebFrameWidget(
 581     RenderWidget* render_widget,
 582     blink::WebLocalFrame* frame) {
 583   return blink::WebFrameWidget::create(render_widget, frame);
 584 }
 585
 586 // static
 587 blink::WebWidget* RenderWidget::CreateWebWidget(RenderWidget* render_widget) {
 588   switch (render_widget->popup_type_) {
 589     case blink::WebPopupTypeNone:  // Nothing to create.
 590       break;
 591     case blink::WebPopupTypePage:
 592       return WebPagePopup::create(render_widget);
 593     default:
 594       NOTREACHED();
 595   }
 596   return NULL;
 597 }
 598
 599 void RenderWidget::CloseForFrame() {
 600   OnClose();
 601 }
 602
 603 bool RenderWidget::Init(int32 opener_id) {
 604   return DoInit(opener_id, RenderWidget::CreateWebWidget(this),
 605                 new ViewHostMsg_CreateWidget(opener_id, popup_type_,
 606                                              &routing_id_, &surface_id_));
 607 }
 608
 609 bool RenderWidget::DoInit(int32 opener_id,
 610                           WebWidget* web_widget,
 611                           IPC::SyncMessage* create_widget_message) {
 612   DCHECK(!webwidget_);
 613
 614   if (opener_id != MSG_ROUTING_NONE)
 615     opener_id_ = opener_id;
 616
 617   webwidget_ = web_widget;
 618
 619   bool result = true;
 620   if (create_widget_message)
 621     result = RenderThread::Get()->Send(create_widget_message);
 622
 623   if (result) {
 624     RenderThread::Get()->AddRoute(routing_id_, this);
 625     // Take a reference on behalf of the RenderThread.  This will be balanced
 626     // when we receive ViewMsg_Close.
 627     AddRef();
 628     if (RenderThreadImpl::current()) {
 629       RenderThreadImpl::current()->WidgetCreated();
 630       if (is_hidden_)
 631         RenderThreadImpl::current()->WidgetHidden();
 632     }
 633     return true;
 634   } else {
 635     // The above Send can fail when the tab is closing.
 636     return false;
 637   }
 638 }
 639
 640 // This is used to complete pending inits and non-pending inits.
 641 void RenderWidget::CompleteInit() {
 642   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 643
 644   init_complete_ = true;
 645
 646   if (compositor_)
 647     StartCompositor();
 648
 649   Send(new ViewHostMsg_RenderViewReady(routing_id_));
 650 }
 651
 652 void RenderWidget::SetSwappedOut(bool is_swapped_out) {
 653   // We should only toggle between states.
 654   DCHECK(is_swapped_out_ != is_swapped_out);
 655   is_swapped_out_ = is_swapped_out;
 656
 657   // If we are swapping out, we will call ReleaseProcess, allowing the process
 658   // to exit if all of its RenderViews are swapped out.  We wait until the
 659   // WasSwappedOut call to do this, to allow the unload handler to finish.
 660   // If we are swapping in, we call AddRefProcess to prevent the process from
 661   // exiting.
 662   if (!is_swapped_out_)
 663     RenderProcess::current()->AddRefProcess();
 664 }
 665
 666 void RenderWidget::WasSwappedOut() {
 667   // If we have been swapped out and no one else is using this process,
 668   // it's safe to exit now.
 669   CHECK(is_swapped_out_);
 670   RenderProcess::current()->ReleaseProcess();
 671 }
 672
 673 void RenderWidget::SetPopupOriginAdjustmentsForEmulation(
 674     ScreenMetricsEmulator* emulator) {
 675   popup_origin_scale_for_emulation_ = emulator->scale();
 676   popup_view_origin_for_emulation_ = emulator->applied_widget_rect().origin();
 677   popup_screen_origin_for_emulation_ = gfx::Point(
 678       emulator->original_screen_rect().origin().x() + emulator->offset().x(),
 679       emulator->original_screen_rect().origin().y() + emulator->offset().y());
 680   screen_info_ = emulator->original_screen_info();
 681   device_scale_factor_ = screen_info_.deviceScaleFactor;
 682 }
 683
 684 gfx::Rect RenderWidget::AdjustValidationMessageAnchor(const gfx::Rect& anchor) {
 685   if (screen_metrics_emulator_)
 686     return screen_metrics_emulator_->AdjustValidationMessageAnchor(anchor);
 687   return anchor;
 688 }
 689
 690 void RenderWidget::SetScreenMetricsEmulationParameters(
 691     bool enabled,
 692     const blink::WebDeviceEmulationParams& params) {
 693   // This is only supported in RenderView.
 694   NOTREACHED();
 695 }
 696
 697 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 698 void RenderWidget::SetExternalPopupOriginAdjustmentsForEmulation(
 699     ExternalPopupMenu* popup, ScreenMetricsEmulator* emulator) {
 700   popup->SetOriginScaleAndOffsetForEmulation(
 701       emulator->scale(), emulator->offset());
 702 }
 703 #endif
 704
 705 void RenderWidget::OnShowHostContextMenu(ContextMenuParams* params) {
 706   if (screen_metrics_emulator_)
 707     screen_metrics_emulator_->OnShowContextMenu(params);
 708 }
 709
 710 bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
 711   bool handled = true;
 712   IPC_BEGIN_MESSAGE_MAP(RenderWidget, message)
 713     IPC_MESSAGE_HANDLER(InputMsg_HandleInputEvent, OnHandleInputEvent)
 714     IPC_MESSAGE_HANDLER(InputMsg_CursorVisibilityChange,
 715                         OnCursorVisibilityChange)
 716     IPC_MESSAGE_HANDLER(InputMsg_ImeSetComposition, OnImeSetComposition)
 717     IPC_MESSAGE_HANDLER(InputMsg_ImeConfirmComposition, OnImeConfirmComposition)
 718     IPC_MESSAGE_HANDLER(InputMsg_MouseCaptureLost, OnMouseCaptureLost)
 719     IPC_MESSAGE_HANDLER(InputMsg_SetFocus, OnSetFocus)
 720     IPC_MESSAGE_HANDLER(InputMsg_SyntheticGestureCompleted,
 721                         OnSyntheticGestureCompleted)
 722     IPC_MESSAGE_HANDLER(ViewMsg_Close, OnClose)
 723     IPC_MESSAGE_HANDLER(ViewMsg_CreatingNew_ACK, OnCreatingNewAck)
 724     IPC_MESSAGE_HANDLER(ViewMsg_Resize, OnResize)
 725     IPC_MESSAGE_HANDLER(ViewMsg_EnableDeviceEmulation,
 726                         OnEnableDeviceEmulation)
 727     IPC_MESSAGE_HANDLER(ViewMsg_DisableDeviceEmulation,
 728                         OnDisableDeviceEmulation)
 729     IPC_MESSAGE_HANDLER(ViewMsg_ColorProfile, OnColorProfile)
 730     IPC_MESSAGE_HANDLER(ViewMsg_ChangeResizeRect, OnChangeResizeRect)
 731     IPC_MESSAGE_HANDLER(ViewMsg_WasHidden, OnWasHidden)
 732     IPC_MESSAGE_HANDLER(ViewMsg_WasShown, OnWasShown)
 733     IPC_MESSAGE_HANDLER(ViewMsg_Repaint, OnRepaint)
 734     IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
 735     IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
 736     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScreenRects, OnUpdateScreenRects)
 737     IPC_MESSAGE_HANDLER(ViewMsg_SetSurfaceIdNamespace, OnSetSurfaceIdNamespace)
 738 #if defined(OS_ANDROID)
 739     IPC_MESSAGE_HANDLER(InputMsg_ImeEventAck, OnImeEventAck)
 740     IPC_MESSAGE_HANDLER(ViewMsg_ShowImeIfNeeded, OnShowImeIfNeeded)
 741 #endif
 742     IPC_MESSAGE_UNHANDLED(handled = false)
 743   IPC_END_MESSAGE_MAP()
 744   return handled;
 745 }
 746
 747 bool RenderWidget::Send(IPC::Message* message) {
 748   // Don't send any messages after the browser has told us to close, and filter
 749   // most outgoing messages while swapped out.
 750   if ((is_swapped_out_ &&
 751        !SwappedOutMessages::CanSendWhileSwappedOut(message)) ||
 752       closing_) {
 753     delete message;
 754     return false;
 755   }
 756
 757   // If given a messsage without a routing ID, then assign our routing ID.
 758   if (message->routing_id() == MSG_ROUTING_NONE)
 759     message->set_routing_id(routing_id_);
 760
 761   return RenderThread::Get()->Send(message);
 762 }
 763
 764 void RenderWidget::Resize(const gfx::Size& new_size,
 765                           const gfx::Size& physical_backing_size,
 766                           bool top_controls_shrink_blink_size,
 767                           float top_controls_height,
 768                           const gfx::Size& visible_viewport_size,
 769                           const gfx::Rect& resizer_rect,
 770                           bool is_fullscreen_granted,
 771                           blink::WebDisplayMode display_mode,
 772                           const ResizeAck resize_ack) {
 773   if (resizing_mode_selector_->NeverUsesSynchronousResize()) {
 774     // A resize ack shouldn't be requested if we have not ACK'd the previous
 775     // one.
 776     DCHECK(resize_ack != SEND_RESIZE_ACK || !next_paint_is_resize_ack());
 777     DCHECK(resize_ack == SEND_RESIZE_ACK || resize_ack == NO_RESIZE_ACK);
 778   }
 779
 780   // Ignore this during shutdown.
 781   if (!webwidget_)
 782     return;
 783
 784   if (compositor_) {
 785     compositor_->setViewportSize(new_size, physical_backing_size);
 786   }
 787
 788   physical_backing_size_ = physical_backing_size;
 789   top_controls_shrink_blink_size_ = top_controls_shrink_blink_size;
 790   top_controls_height_ = top_controls_height;
 791   visible_viewport_size_ = visible_viewport_size;
 792   resizer_rect_ = resizer_rect;
 793
 794   // NOTE: We may have entered fullscreen mode without changing our size.
 795   bool fullscreen_change = is_fullscreen_granted_ != is_fullscreen_granted;
 796   is_fullscreen_granted_ = is_fullscreen_granted;
 797   display_mode_ = display_mode;
 798
 799   webwidget_->setTopControlsHeight(top_controls_height,
 800                                    top_controls_shrink_blink_size_);
 801
 802   if (size_ != new_size) {
 803     size_ = new_size;
 804
 805     // When resizing, we want to wait to paint before ACK'ing the resize.  This
 806     // ensures that we only resize as fast as we can paint.  We only need to
 807     // send an ACK if we are resized to a non-empty rect.
 808     webwidget_->resize(new_size);
 809   }
 810
 811   webwidget()->resizePinchViewport(gfx::Size(
 812       visible_viewport_size.width(),
 813       visible_viewport_size.height()));
 814
 815   if (new_size.IsEmpty() || physical_backing_size.IsEmpty()) {
 816     // In this case there is no paint/composite and therefore no
 817     // ViewHostMsg_UpdateRect to send the resize ack with. We'd need to send the
 818     // ack through a fake ViewHostMsg_UpdateRect or a different message.
 819     DCHECK_EQ(resize_ack, NO_RESIZE_ACK);
 820   }
 821
 822   // Send the Resize_ACK flag once we paint again if requested.
 823   if (resize_ack == SEND_RESIZE_ACK)
 824     set_next_paint_is_resize_ack();
 825
 826   if (fullscreen_change)
 827     DidToggleFullscreen();
 828
 829   // If a resize ack is requested and it isn't set-up, then no more resizes will
 830   // come in and in general things will go wrong.
 831   DCHECK(resize_ack != SEND_RESIZE_ACK || next_paint_is_resize_ack());
 832 }
 833
 834 void RenderWidget::SetWindowRectSynchronously(
 835     const gfx::Rect& new_window_rect) {
 836   Resize(new_window_rect.size(),
 837          new_window_rect.size(),
 838          top_controls_shrink_blink_size_,
 839          top_controls_height_,
 840          new_window_rect.size(),
 841          gfx::Rect(),
 842          is_fullscreen_granted_,
 843          display_mode_,
 844          NO_RESIZE_ACK);
 845   view_screen_rect_ = new_window_rect;
 846   window_screen_rect_ = new_window_rect;
 847   if (!did_show_)
 848     initial_rect_ = new_window_rect;
 849 }
 850
 851 void RenderWidget::OnClose() {
 852   DCHECK(content::RenderThread::Get());
 853   if (closing_)
 854     return;
 855   NotifyOnClose();
 856   closing_ = true;
 857
 858   // Browser correspondence is no longer needed at this point.
 859   if (routing_id_ != MSG_ROUTING_NONE) {
 860     RenderThread::Get()->RemoveRoute(routing_id_);
 861     SetHidden(false);
 862     if (RenderThreadImpl::current())
 863       RenderThreadImpl::current()->WidgetDestroyed();
 864   }
 865
 866   if (for_oopif_) {
 867     // Widgets for frames may be created and closed at any time while the frame
 868     // is alive. However, the closing process must happen synchronously. Frame
 869     // widget and frames hold pointers to each other. If Close() is deferred to
 870     // the message loop like in the non-frame widget case, WebWidget::close()
 871     // can end up accessing members of an already-deleted frame.
 872     Close();
 873   } else {
 874     // If there is a Send call on the stack, then it could be dangerous to close
 875     // now.  Post a task that only gets invoked when there are no nested message
 876     // loops.
 877     base::ThreadTaskRunnerHandle::Get()->PostNonNestableTask(
 878         FROM_HERE, base::Bind(&RenderWidget::Close, this));
 879   }
 880
 881   // Balances the AddRef taken when we called AddRoute.
 882   Release();
 883 }
 884
 885 // Got a response from the browser after the renderer decided to create a new
 886 // view.
 887 void RenderWidget::OnCreatingNewAck() {
 888   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 889
 890   CompleteInit();
 891 }
 892
 893 void RenderWidget::OnResize(const ViewMsg_Resize_Params& params) {
 894   if (resizing_mode_selector_->ShouldAbortOnResize(this, params))
 895     return;
 896
 897   if (screen_metrics_emulator_) {
 898     screen_metrics_emulator_->OnResizeMessage(params);
 899     return;
 900   }
 901
 902   bool orientation_changed =
 903       screen_info_.orientationAngle != params.screen_info.orientationAngle;
 904
 905   screen_info_ = params.screen_info;
 906   SetDeviceScaleFactor(screen_info_.deviceScaleFactor);
 907   Resize(params.new_size,
 908          params.physical_backing_size,
 909          params.top_controls_shrink_blink_size,
 910          params.top_controls_height,
 911          params.visible_viewport_size,
 912          params.resizer_rect,
 913          params.is_fullscreen_granted,
 914          params.display_mode,
 915          params.needs_resize_ack ? SEND_RESIZE_ACK : NO_RESIZE_ACK);
 916
 917   if (orientation_changed)
 918     OnOrientationChange();
 919 }
 920
 921 void RenderWidget::OnEnableDeviceEmulation(
 922    const blink::WebDeviceEmulationParams& params) {
 923   if (!screen_metrics_emulator_)
 924     screen_metrics_emulator_.reset(new ScreenMetricsEmulator(this, params));
 925   else
 926     screen_metrics_emulator_->ChangeEmulationParams(params);
 927 }
 928
 929 void RenderWidget::OnDisableDeviceEmulation() {
 930   screen_metrics_emulator_.reset();
 931 }
 932
 933 void RenderWidget::OnColorProfile(const std::vector<char>& color_profile) {
 934   SetDeviceColorProfile(color_profile);
 935 }
 936
 937 void RenderWidget::OnChangeResizeRect(const gfx::Rect& resizer_rect) {
 938   if (resizer_rect_ == resizer_rect)
 939     return;
 940   resizer_rect_ = resizer_rect;
 941   if (webwidget_)
 942     webwidget_->didChangeWindowResizerRect();
 943 }
 944
 945 void RenderWidget::OnWasHidden() {
 946   TRACE_EVENT0("renderer", "RenderWidget::OnWasHidden");
 947   // Go into a mode where we stop generating paint and scrolling events.
 948   SetHidden(true);
 949   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
 950                     WasHidden());
 951 }
 952
 953 void RenderWidget::OnWasShown(bool needs_repainting,
 954                               const ui::LatencyInfo& latency_info) {
 955   TRACE_EVENT0("renderer", "RenderWidget::OnWasShown");
 956   // During shutdown we can just ignore this message.
 957   if (!webwidget_)
 958     return;
 959
 960   // See OnWasHidden
 961   SetHidden(false);
 962   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
 963                     WasShown());
 964
 965   if (!needs_repainting)
 966     return;
 967
 968   // Generate a full repaint.
 969   if (compositor_) {
 970     ui::LatencyInfo swap_latency_info(latency_info);
 971     scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor(
 972         compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info));
 973     compositor_->SetNeedsForcedRedraw();
 974   }
 975   ScheduleComposite();
 976 }
 977
 978 void RenderWidget::OnRequestMoveAck() {
 979   DCHECK(pending_window_rect_count_);
 980   pending_window_rect_count_--;
 981 }
 982
 983 GURL RenderWidget::GetURLForGraphicsContext3D() {
 984   return GURL();
 985 }
 986
 987 scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(bool fallback) {
 988   // For widgets that are never visible, we don't start the compositor, so we
 989   // never get a request for a cc::OutputSurface.
 990   DCHECK(!never_visible_);
 991
 992 #if defined(OS_ANDROID)
 993   if (SynchronousCompositorFactory* factory =
 994       SynchronousCompositorFactory::GetInstance()) {
 995     return factory->CreateOutputSurface(routing_id(), surface_id(),
 996                                         frame_swap_message_queue_);
 997   }
 998 #endif
 999
1000   const base::CommandLine& command_line =
1001       *base::CommandLine::ForCurrentProcess();
1002   bool use_software = fallback;
1003   if (command_line.HasSwitch(switches::kDisableGpuCompositing))
1004     use_software = true;
1005
1006   scoped_refptr<ContextProviderCommandBuffer> context_provider;
1007   scoped_refptr<ContextProviderCommandBuffer> worker_context_provider;
1008   if (!use_software) {
1009     context_provider = ContextProviderCommandBuffer::Create(
1010         CreateGraphicsContext3D(true), RENDER_COMPOSITOR_CONTEXT);
1011     if (!context_provider.get()) {
1012       // Cause the compositor to wait and try again.
1013       return scoped_ptr<cc::OutputSurface>();
1014     }
1015
1016     worker_context_provider = ContextProviderCommandBuffer::Create(
1017         CreateGraphicsContext3D(false), RENDER_WORKER_CONTEXT);
1018     if (!worker_context_provider.get()) {
1019       // Cause the compositor to wait and try again.
1020       return scoped_ptr<cc::OutputSurface>();
1021     }
1022   }
1023
1024   uint32 output_surface_id = next_output_surface_id_++;
1025   if (command_line.HasSwitch(switches::kEnableDelegatedRenderer)) {
1026     DCHECK(compositor_deps_->GetCompositorImplThreadTaskRunner());
1027     return scoped_ptr<cc::OutputSurface>(new DelegatedCompositorOutputSurface(
1028         routing_id(), output_surface_id, context_provider,
1029         worker_context_provider, frame_swap_message_queue_));
1030   }
1031   if (!context_provider.get()) {
1032     scoped_ptr<cc::SoftwareOutputDevice> software_device(
1033         new cc::SoftwareOutputDevice());
1034
1035     return scoped_ptr<cc::OutputSurface>(new CompositorOutputSurface(
1036         routing_id(), output_surface_id, nullptr, nullptr,
1037         software_device.Pass(), frame_swap_message_queue_, true));
1038   }
1039
1040   if (command_line.HasSwitch(cc::switches::kCompositeToMailbox)) {
1041     // Composite-to-mailbox is currently used for layout tests in order to cause
1042     // them to draw inside in the renderer to do the readback there. This should
1043     // no longer be the case when crbug.com/311404 is fixed.
1044     DCHECK(RenderThreadImpl::current()->layout_test_mode());
1045     cc::ResourceFormat format = cc::RGBA_8888;
1046     if (base::SysInfo::IsLowEndDevice())
1047       format = cc::RGB_565;
1048     return scoped_ptr<cc::OutputSurface>(new MailboxOutputSurface(
1049         routing_id(), output_surface_id, context_provider,
1050         worker_context_provider, scoped_ptr<cc::SoftwareOutputDevice>(),
1051         frame_swap_message_queue_, format));
1052   }
1053   bool use_swap_compositor_frame_message = false;
1054   return scoped_ptr<cc::OutputSurface>(new CompositorOutputSurface(
1055       routing_id(), output_surface_id, context_provider,
1056       worker_context_provider, scoped_ptr<cc::SoftwareOutputDevice>(),
1057       frame_swap_message_queue_, use_swap_compositor_frame_message));
1058 }
1059
1060 void RenderWidget::OnSwapBuffersAborted() {
1061   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersAborted");
1062   // Schedule another frame so the compositor learns about it.
1063   ScheduleComposite();
1064 }
1065
1066 void RenderWidget::OnSwapBuffersPosted() {
1067   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersPosted");
1068 }
1069
1070 void RenderWidget::OnSwapBuffersComplete() {
1071   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersComplete");
1072
1073   // Notify subclasses that composited rendering was flushed to the screen.
1074   DidFlushPaint();
1075 }
1076
1077 void RenderWidget::OnHandleInputEvent(const blink::WebInputEvent* input_event,
1078                                       const ui::LatencyInfo& latency_info,
1079                                       bool is_keyboard_shortcut) {
1080   if (!input_event)
1081     return;
1082   base::AutoReset<bool> handling_input_event_resetter(&handling_input_event_,
1083                                                       true);
1084   base::AutoReset<WebInputEvent::Type> handling_event_type_resetter(
1085       &handling_event_type_, input_event->type);
1086
1087   // Calls into |didOverscroll()| while handling this event will populate
1088   // |event_overscroll|, which in turn will be bundled with the event ack.
1089   scoped_ptr<DidOverscrollParams> event_overscroll;
1090   base::AutoReset<scoped_ptr<DidOverscrollParams>*>
1091       handling_event_overscroll_resetter(&handling_event_overscroll_,
1092                                          &event_overscroll);
1093
1094 #if defined(OS_ANDROID)
1095   // On Android, when a key is pressed or sent from the Keyboard using IME,
1096   // |AdapterInputConnection| generates input key events to make sure all JS
1097   // listeners that monitor KeyUp and KeyDown events receive the proper key
1098   // code. Since this input key event comes from IME, we need to set the
1099   // IME event guard here to make sure it does not interfere with other IME
1100   // events.
1101   scoped_ptr<ImeEventGuard> ime_event_guard_maybe;
1102   if (WebInputEvent::isKeyboardEventType(input_event->type)) {
1103     const WebKeyboardEvent& key_event =
1104         *static_cast<const WebKeyboardEvent*>(input_event);
1105     // Some keys are special and it's essential that no events get blocked.
1106     if (key_event.nativeKeyCode != AKEYCODE_TAB &&
1107         key_event.nativeKeyCode != AKEYCODE_DPAD_CENTER &&
1108         key_event.nativeKeyCode != AKEYCODE_DPAD_LEFT &&
1109         key_event.nativeKeyCode != AKEYCODE_DPAD_RIGHT &&
1110         key_event.nativeKeyCode != AKEYCODE_DPAD_UP &&
1111         key_event.nativeKeyCode != AKEYCODE_DPAD_DOWN)
1112       ime_event_guard_maybe.reset(new ImeEventGuard(this));
1113   }
1114 #endif
1115
1116   base::TimeTicks start_time;
1117   if (base::TimeTicks::IsHighResolution())
1118     start_time = base::TimeTicks::Now();
1119
1120   TRACE_EVENT1("renderer,benchmark", "RenderWidget::OnHandleInputEvent",
1121                "event", WebInputEventTraits::GetName(input_event->type));
1122   TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("blink.HandleInputEvent");
1123   TRACE_EVENT_FLOW_STEP0(
1124       "input,benchmark",
1125       "LatencyInfo.Flow",
1126       TRACE_ID_DONT_MANGLE(latency_info.trace_id()),
1127       "HanldeInputEventMain");
1128
1129   // If we don't have a high res timer, these metrics won't be accurate enough
1130   // to be worth collecting. Note that this does introduce some sampling bias.
1131   if (!start_time.is_null())
1132     LogInputEventLatencyUma(*input_event, start_time);
1133
1134   scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor;
1135   ui::LatencyInfo swap_latency_info(latency_info);
1136   if (compositor_) {
1137     latency_info_swap_promise_monitor =
1138         compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info)
1139             .Pass();
1140   }
1141
1142   bool prevent_default = false;
1143   if (WebInputEvent::isMouseEventType(input_event->type)) {
1144     const WebMouseEvent& mouse_event =
1145         *static_cast<const WebMouseEvent*>(input_event);
1146     TRACE_EVENT2("renderer", "HandleMouseMove",
1147                  "x", mouse_event.x, "y", mouse_event.y);
1148     context_menu_source_type_ = ui::MENU_SOURCE_MOUSE;
1149     prevent_default = WillHandleMouseEvent(mouse_event);
1150   }
1151
1152   if (WebInputEvent::isKeyboardEventType(input_event->type)) {
1153     context_menu_source_type_ = ui::MENU_SOURCE_KEYBOARD;
1154 #if defined(OS_ANDROID)
1155     // The DPAD_CENTER key on Android has a dual semantic: (1) in the general
1156     // case it should behave like a select key (i.e. causing a click if a button
1157     // is focused). However, if a text field is focused (2), its intended
1158     // behavior is to just show the IME and don't propagate the key.
1159     // A typical use case is a web form: the DPAD_CENTER should bring up the IME
1160     // when clicked on an input text field and cause the form submit if clicked
1161     // when the submit button is focused, but not vice-versa.
1162     // The UI layer takes care of translating DPAD_CENTER into a RETURN key,
1163     // but at this point we have to swallow the event for the scenario (2).
1164     const WebKeyboardEvent& key_event =
1165         *static_cast<const WebKeyboardEvent*>(input_event);
1166     if (key_event.nativeKeyCode == AKEYCODE_DPAD_CENTER &&
1167         GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE) {
1168       OnShowImeIfNeeded();
1169       prevent_default = true;
1170     }
1171 #endif
1172   }
1173
1174   if (WebInputEvent::isGestureEventType(input_event->type)) {
1175     const WebGestureEvent& gesture_event =
1176         *static_cast<const WebGestureEvent*>(input_event);
1177     context_menu_source_type_ = ui::MENU_SOURCE_TOUCH;
1178     prevent_default = prevent_default || WillHandleGestureEvent(gesture_event);
1179   }
1180
1181   bool processed = prevent_default;
1182   if (input_event->type != WebInputEvent::Char || !suppress_next_char_events_) {
1183     suppress_next_char_events_ = false;
1184     if (!processed && webwidget_)
1185       processed = webwidget_->handleInputEvent(*input_event);
1186   }
1187
1188   // If this RawKeyDown event corresponds to a browser keyboard shortcut and
1189   // it's not processed by webkit, then we need to suppress the upcoming Char
1190   // events.
1191   if (!processed && is_keyboard_shortcut)
1192     suppress_next_char_events_ = true;
1193
1194   InputEventAckState ack_result = processed ?
1195       INPUT_EVENT_ACK_STATE_CONSUMED : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1196   if (!processed &&  input_event->type == WebInputEvent::TouchStart) {
1197     const WebTouchEvent& touch_event =
1198         *static_cast<const WebTouchEvent*>(input_event);
1199     // Hit-test for all the pressed touch points. If there is a touch-handler
1200     // for any of the touch points, then the renderer should continue to receive
1201     // touch events.
1202     ack_result = INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1203     for (size_t i = 0; i < touch_event.touchesLength; ++i) {
1204       if (touch_event.touches[i].state == WebTouchPoint::StatePressed &&
1205           HasTouchEventHandlersAt(
1206               gfx::ToFlooredPoint(touch_event.touches[i].position))) {
1207         ack_result = INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1208         break;
1209       }
1210     }
1211   }
1212
1213   // Send mouse wheel events and their disposition to the compositor thread, so
1214   // that they can be used to produce the elastic overscroll effect on Mac.
1215   if (input_event->type == WebInputEvent::MouseWheel) {
1216     ObserveWheelEventAndResult(
1217         static_cast<const WebMouseWheelEvent&>(*input_event),
1218         event_overscroll ? event_overscroll->latest_overscroll_delta
1219                          : gfx::Vector2dF(),
1220         processed);
1221   }
1222
1223   bool frame_pending = compositor_ && compositor_->BeginMainFrameRequested();
1224
1225   // If we don't have a fast and accurate Now(), we assume the input handlers
1226   // are heavy and rate limit them.
1227   bool rate_limiting_wanted =
1228       input_event->type == WebInputEvent::MouseMove ||
1229       input_event->type == WebInputEvent::MouseWheel;
1230   if (rate_limiting_wanted && !start_time.is_null()) {
1231       base::TimeTicks end_time = base::TimeTicks::Now();
1232       total_input_handling_time_this_frame_ += (end_time - start_time);
1233       rate_limiting_wanted =
1234           total_input_handling_time_this_frame_.InMicroseconds() >
1235           kInputHandlingTimeThrottlingThresholdMicroseconds;
1236   }
1237
1238   TRACE_EVENT_SYNTHETIC_DELAY_END("blink.HandleInputEvent");
1239
1240   // Note that we can't use handling_event_type_ here since it will be overriden
1241   // by reentrant calls for events after the paused one.
1242   bool no_ack = ignore_ack_for_mouse_move_from_debugger_ &&
1243       input_event->type == WebInputEvent::MouseMove;
1244   if (WebInputEventTraits::WillReceiveAckFromRenderer(*input_event) &&
1245       !no_ack) {
1246     InputEventAck ack(input_event->type, ack_result, swap_latency_info,
1247                       event_overscroll.Pass(),
1248                       WebInputEventTraits::GetUniqueTouchEventId(*input_event));
1249     scoped_ptr<IPC::Message> response(
1250         new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
1251     if (rate_limiting_wanted && frame_pending && !is_hidden_) {
1252       // We want to rate limit the input events in this case, so we'll wait for
1253       // painting to finish before ACKing this message.
1254       TRACE_EVENT_INSTANT0("renderer",
1255         "RenderWidget::OnHandleInputEvent ack throttled",
1256         TRACE_EVENT_SCOPE_THREAD);
1257       if (pending_input_event_ack_) {
1258         TRACE_EVENT_ASYNC_END0("input", "RenderWidget::ThrottledInputEventAck",
1259                                pending_input_event_ack_.get());
1260         // As two different kinds of events could cause us to postpone an ack
1261         // we send it now, if we have one pending. The Browser should never
1262         // send us the same kind of event we are delaying the ack for.
1263         Send(pending_input_event_ack_.release());
1264       }
1265       pending_input_event_ack_ = response.Pass();
1266       TRACE_EVENT_ASYNC_BEGIN0("input", "RenderWidget::ThrottledInputEventAck",
1267                                pending_input_event_ack_.get());
1268       if (compositor_)
1269         compositor_->NotifyInputThrottledUntilCommit();
1270     } else {
1271       Send(response.release());
1272     }
1273   } else {
1274     DCHECK(!event_overscroll) << "Unexpected overscroll for un-acked event";
1275   }
1276   if (!no_ack && RenderThreadImpl::current()) {
1277     RenderThreadImpl::current()
1278         ->GetRendererScheduler()
1279         ->DidHandleInputEventOnMainThread(*input_event);
1280   }
1281   if (input_event->type == WebInputEvent::MouseMove)
1282     ignore_ack_for_mouse_move_from_debugger_ = false;
1283
1284 #if defined(OS_ANDROID)
1285   // Allow the IME to be shown when the focus changes as a consequence
1286   // of a processed touch end event.
1287   if (input_event->type == WebInputEvent::TouchEnd && processed)
1288     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
1289 #elif defined(USE_AURA)
1290   // Show the virtual keyboard if enabled and a user gesture triggers a focus
1291   // change.
1292   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
1293                     input_event->type == WebInputEvent::MouseUp)) {
1294     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_IME);
1295   }
1296 #endif
1297
1298   if (!prevent_default) {
1299     if (WebInputEvent::isKeyboardEventType(input_event->type))
1300       DidHandleKeyEvent();
1301   }
1302
1303 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
1304 // virtual keyboard.
1305 #if !defined(OS_ANDROID)
1306   // Virtual keyboard is not supported, so react to focus change immediately.
1307   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
1308                     input_event->type == WebInputEvent::MouseUp)) {
1309     FocusChangeComplete();
1310   }
1311 #endif
1312 }
1313
1314 void RenderWidget::OnCursorVisibilityChange(bool is_visible) {
1315   if (webwidget_)
1316     webwidget_->setCursorVisibilityState(is_visible);
1317 }
1318
1319 void RenderWidget::OnMouseCaptureLost() {
1320   if (webwidget_)
1321     webwidget_->mouseCaptureLost();
1322 }
1323
1324 void RenderWidget::OnSetFocus(bool enable) {
1325   has_focus_ = enable;
1326   if (webwidget_)
1327     webwidget_->setFocus(enable);
1328 }
1329
1330 void RenderWidget::ClearFocus() {
1331   // We may have got the focus from the browser before this gets processed, in
1332   // which case we do not want to unfocus ourself.
1333   if (!has_focus_ && webwidget_)
1334     webwidget_->setFocus(false);
1335 }
1336
1337 void RenderWidget::FlushPendingInputEventAck() {
1338   if (pending_input_event_ack_) {
1339     TRACE_EVENT_ASYNC_END0("input", "RenderWidget::ThrottledInputEventAck",
1340                            pending_input_event_ack_.get());
1341     Send(pending_input_event_ack_.release());
1342   }
1343   total_input_handling_time_this_frame_ = base::TimeDelta();
1344 }
1345
1346 ///////////////////////////////////////////////////////////////////////////////
1347 // WebWidgetClient
1348
1349 void RenderWidget::didAutoResize(const WebSize& new_size) {
1350   if (size_.width() != new_size.width || size_.height() != new_size.height) {
1351     size_ = new_size;
1352
1353     if (resizing_mode_selector_->is_synchronous_mode()) {
1354       WebRect new_pos(rootWindowRect().x,
1355                       rootWindowRect().y,
1356                       new_size.width,
1357                       new_size.height);
1358       view_screen_rect_ = new_pos;
1359       window_screen_rect_ = new_pos;
1360     }
1361
1362     AutoResizeCompositor();
1363
1364     if (!resizing_mode_selector_->is_synchronous_mode())
1365       need_update_rect_for_auto_resize_ = true;
1366   }
1367 }
1368
1369 void RenderWidget::AutoResizeCompositor()  {
1370   physical_backing_size_ = gfx::ToCeiledSize(gfx::ScaleSize(size_,
1371       device_scale_factor_));
1372   if (compositor_)
1373     compositor_->setViewportSize(size_, physical_backing_size_);
1374 }
1375
1376 void RenderWidget::initializeLayerTreeView() {
1377   DCHECK(!host_closing_);
1378
1379   compositor_ = RenderWidgetCompositor::Create(this, compositor_deps_);
1380   compositor_->setViewportSize(size_, physical_backing_size_);
1381   if (init_complete_)
1382     StartCompositor();
1383 }
1384
1385 void RenderWidget::WillCloseLayerTreeView() {
1386   if (host_closing_)
1387     return;
1388
1389   // Prevent new compositors or output surfaces from being created.
1390   host_closing_ = true;
1391
1392   // Always send this notification to prevent new layer tree views from
1393   // being created, even if one hasn't been created yet.
1394   if (webwidget_)
1395     webwidget_->willCloseLayerTreeView();
1396 }
1397
1398 blink::WebLayerTreeView* RenderWidget::layerTreeView() {
1399   return compositor_.get();
1400 }
1401
1402 void RenderWidget::WillBeginCompositorFrame() {
1403   TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
1404
1405   // The UpdateTextInputState can result in further layout and possibly
1406   // enable GPU acceleration so they need to be called before any painting
1407   // is done.
1408   UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
1409   UpdateSelectionBounds();
1410 }
1411
1412 void RenderWidget::DidCommitCompositorFrame() {
1413   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
1414                     DidCommitCompositorFrame());
1415   FOR_EACH_OBSERVER(RenderFrameProxy, render_frame_proxies_,
1416                     DidCommitCompositorFrame());
1417 #if defined(VIDEO_HOLE)
1418   FOR_EACH_OBSERVER(RenderFrameImpl, video_hole_frames_,
1419                     DidCommitCompositorFrame());
1420 #endif  // defined(VIDEO_HOLE)
1421   FlushPendingInputEventAck();
1422 }
1423
1424 void RenderWidget::DidCommitAndDrawCompositorFrame() {
1425   // NOTE: Tests may break if this event is renamed or moved. See
1426   // tab_capture_performancetest.cc.
1427   TRACE_EVENT0("gpu", "RenderWidget::DidCommitAndDrawCompositorFrame");
1428   // Notify subclasses that we initiated the paint operation.
1429   DidInitiatePaint();
1430 }
1431
1432 void RenderWidget::DidCompleteSwapBuffers() {
1433   TRACE_EVENT0("renderer", "RenderWidget::DidCompleteSwapBuffers");
1434
1435   // Notify subclasses threaded composited rendering was flushed to the screen.
1436   DidFlushPaint();
1437
1438   if (!next_paint_flags_ &&
1439       !need_update_rect_for_auto_resize_ &&
1440       !plugin_window_moves_.size()) {
1441     return;
1442   }
1443
1444   ViewHostMsg_UpdateRect_Params params;
1445   params.view_size = size_;
1446   params.plugin_window_moves.swap(plugin_window_moves_);
1447   params.flags = next_paint_flags_;
1448
1449   Send(new ViewHostMsg_UpdateRect(routing_id_, params));
1450   next_paint_flags_ = 0;
1451   need_update_rect_for_auto_resize_ = false;
1452 }
1453
1454 void RenderWidget::ScheduleComposite() {
1455   if (compositor_ &&
1456       compositor_deps_->GetCompositorImplThreadTaskRunner().get()) {
1457     compositor_->setNeedsAnimate();
1458   }
1459 }
1460
1461 void RenderWidget::ScheduleCompositeWithForcedRedraw() {
1462   if (compositor_) {
1463     // Regardless of whether threaded compositing is enabled, always
1464     // use this mechanism to force the compositor to redraw. However,
1465     // the invalidation code path below is still needed for the
1466     // non-threaded case.
1467     compositor_->SetNeedsForcedRedraw();
1468   }
1469   ScheduleComposite();
1470 }
1471
1472 // static
1473 scoped_ptr<cc::SwapPromise> RenderWidget::QueueMessageImpl(
1474     IPC::Message* msg,
1475     MessageDeliveryPolicy policy,
1476     FrameSwapMessageQueue* frame_swap_message_queue,
1477     scoped_refptr<IPC::SyncMessageFilter> sync_message_filter,
1478     int source_frame_number) {
1479   bool first_message_for_frame = false;
1480   frame_swap_message_queue->QueueMessageForFrame(policy,
1481                                                  source_frame_number,
1482                                                  make_scoped_ptr(msg),
1483                                                  &first_message_for_frame);
1484   if (first_message_for_frame) {
1485     scoped_ptr<cc::SwapPromise> promise(new QueueMessageSwapPromise(
1486         sync_message_filter, frame_swap_message_queue, source_frame_number));
1487     return promise;
1488   }
1489   return nullptr;
1490 }
1491
1492 void RenderWidget::QueueMessage(IPC::Message* msg,
1493                                 MessageDeliveryPolicy policy) {
1494   // RenderThreadImpl::current() is NULL in some tests.
1495   if (!compositor_ || !RenderThreadImpl::current()) {
1496     Send(msg);
1497     return;
1498   }
1499
1500   scoped_ptr<cc::SwapPromise> swap_promise =
1501       QueueMessageImpl(msg,
1502                        policy,
1503                        frame_swap_message_queue_.get(),
1504                        RenderThreadImpl::current()->sync_message_filter(),
1505                        compositor_->GetSourceFrameNumber());
1506
1507   if (swap_promise) {
1508     compositor_->QueueSwapPromise(swap_promise.Pass());
1509     // Request a commit. This might either A) request a commit ahead of time
1510     // or B) request a commit which is not needed because there are not
1511     // pending updates. If B) then the commit will be skipped and the swap
1512     // promises will be broken (see EarlyOut_NoUpdates). To achieve that we
1513     // call SetNeedsUpdateLayers instead of SetNeedsCommit so that
1514     // can_cancel_commit is not unset.
1515     compositor_->SetNeedsUpdateLayers();
1516   }
1517 }
1518
1519 void RenderWidget::didChangeCursor(const WebCursorInfo& cursor_info) {
1520   // TODO(darin): Eliminate this temporary.
1521   WebCursor cursor;
1522   InitializeCursorFromWebKitCursorInfo(&cursor, cursor_info);
1523   // Only send a SetCursor message if we need to make a change.
1524   if (!current_cursor_.IsEqual(cursor)) {
1525     current_cursor_ = cursor;
1526     Send(new ViewHostMsg_SetCursor(routing_id_, cursor));
1527   }
1528 }
1529
1530 // We are supposed to get a single call to Show for a newly created RenderWidget
1531 // that was created via RenderWidget::CreateWebView.  So, we wait until this
1532 // point to dispatch the ShowWidget message.
1533 //
1534 // This method provides us with the information about how to display the newly
1535 // created RenderWidget (i.e., as a blocked popup or as a new tab).
1536 //
1537 void RenderWidget::show(WebNavigationPolicy) {
1538   DCHECK(!did_show_) << "received extraneous Show call";
1539   DCHECK(routing_id_ != MSG_ROUTING_NONE);
1540   DCHECK(opener_id_ != MSG_ROUTING_NONE);
1541
1542   if (did_show_)
1543     return;
1544
1545   did_show_ = true;
1546   // NOTE: initial_rect_ may still have its default values at this point, but
1547   // that's okay.  It'll be ignored if as_popup is false, or the browser
1548   // process will impose a default position otherwise.
1549   Send(new ViewHostMsg_ShowWidget(opener_id_, routing_id_, initial_rect_));
1550   SetPendingWindowRect(initial_rect_);
1551 }
1552
1553 void RenderWidget::didFocus() {
1554 }
1555
1556 void RenderWidget::didBlur() {
1557 }
1558
1559 void RenderWidget::DoDeferredClose() {
1560   WillCloseLayerTreeView();
1561   Send(new ViewHostMsg_Close(routing_id_));
1562 }
1563
1564 void RenderWidget::NotifyOnClose() {
1565   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_, WidgetWillClose());
1566 }
1567
1568 void RenderWidget::closeWidgetSoon() {
1569   DCHECK(content::RenderThread::Get());
1570   if (is_swapped_out_) {
1571     // This widget is currently swapped out, and the active widget is in a
1572     // different process.  Have the browser route the close request to the
1573     // active widget instead, so that the correct unload handlers are run.
1574     Send(new ViewHostMsg_RouteCloseEvent(routing_id_));
1575     return;
1576   }
1577
1578   // If a page calls window.close() twice, we'll end up here twice, but that's
1579   // OK.  It is safe to send multiple Close messages.
1580
1581   // Ask the RenderWidgetHost to initiate close.  We could be called from deep
1582   // in Javascript.  If we ask the RendwerWidgetHost to close now, the window
1583   // could be closed before the JS finishes executing.  So instead, post a
1584   // message back to the message loop, which won't run until the JS is
1585   // complete, and then the Close message can be sent.
1586   base::ThreadTaskRunnerHandle::Get()->PostTask(
1587       FROM_HERE, base::Bind(&RenderWidget::DoDeferredClose, this));
1588 }
1589
1590 void RenderWidget::QueueSyntheticGesture(
1591     scoped_ptr<SyntheticGestureParams> gesture_params,
1592     const SyntheticGestureCompletionCallback& callback) {
1593   DCHECK(!callback.is_null());
1594
1595   pending_synthetic_gesture_callbacks_.push(callback);
1596
1597   SyntheticGesturePacket gesture_packet;
1598   gesture_packet.set_gesture_params(gesture_params.Pass());
1599
1600   Send(new InputHostMsg_QueueSyntheticGesture(routing_id_, gesture_packet));
1601 }
1602
1603 void RenderWidget::Close() {
1604   screen_metrics_emulator_.reset();
1605   WillCloseLayerTreeView();
1606   compositor_.reset();
1607   if (webwidget_) {
1608     webwidget_->close();
1609     webwidget_ = NULL;
1610   }
1611 }
1612
1613 WebRect RenderWidget::windowRect() {
1614   if (pending_window_rect_count_)
1615     return pending_window_rect_;
1616
1617   return view_screen_rect_;
1618 }
1619
1620 void RenderWidget::setToolTipText(const blink::WebString& text,
1621                                   WebTextDirection hint) {
1622   Send(new ViewHostMsg_SetTooltipText(routing_id_, text, hint));
1623 }
1624
1625 void RenderWidget::setWindowRect(const WebRect& rect) {
1626   WebRect window_rect = rect;
1627   if (popup_origin_scale_for_emulation_) {
1628     float scale = popup_origin_scale_for_emulation_;
1629     window_rect.x = popup_screen_origin_for_emulation_.x() +
1630         (window_rect.x - popup_view_origin_for_emulation_.x()) * scale;
1631     window_rect.y = popup_screen_origin_for_emulation_.y() +
1632         (window_rect.y - popup_view_origin_for_emulation_.y()) * scale;
1633   }
1634
1635   if (!resizing_mode_selector_->is_synchronous_mode()) {
1636     if (did_show_) {
1637       Send(new ViewHostMsg_RequestMove(routing_id_, window_rect));
1638       SetPendingWindowRect(window_rect);
1639     } else {
1640       initial_rect_ = window_rect;
1641     }
1642   } else {
1643     SetWindowRectSynchronously(window_rect);
1644   }
1645 }
1646
1647 void RenderWidget::SetPendingWindowRect(const WebRect& rect) {
1648   pending_window_rect_ = rect;
1649   pending_window_rect_count_++;
1650 }
1651
1652 WebRect RenderWidget::rootWindowRect() {
1653   if (pending_window_rect_count_) {
1654     // NOTE(mbelshe): If there is a pending_window_rect_, then getting
1655     // the RootWindowRect is probably going to return wrong results since the
1656     // browser may not have processed the Move yet.  There isn't really anything
1657     // good to do in this case, and it shouldn't happen - since this size is
1658     // only really needed for windowToScreen, which is only used for Popups.
1659     return pending_window_rect_;
1660   }
1661
1662   return window_screen_rect_;
1663 }
1664
1665 WebRect RenderWidget::windowResizerRect() {
1666   return resizer_rect_;
1667 }
1668
1669 void RenderWidget::OnImeSetComposition(
1670     const base::string16& text,
1671     const std::vector<WebCompositionUnderline>& underlines,
1672     int selection_start, int selection_end) {
1673   if (!ShouldHandleImeEvent())
1674     return;
1675   ImeEventGuard guard(this);
1676   base::AutoReset<bool> handling_input_event_resetter(&handling_input_event_,
1677                                                       true);
1678   if (!webwidget_->setComposition(
1679       text, WebVector<WebCompositionUnderline>(underlines),
1680       selection_start, selection_end)) {
1681     // If we failed to set the composition text, then we need to let the browser
1682     // process to cancel the input method's ongoing composition session, to make
1683     // sure we are in a consistent state.
1684     Send(new InputHostMsg_ImeCancelComposition(routing_id()));
1685   }
1686   UpdateCompositionInfo(true);
1687 }
1688
1689 void RenderWidget::OnImeConfirmComposition(const base::string16& text,
1690                                            const gfx::Range& replacement_range,
1691                                            bool keep_selection) {
1692   if (!ShouldHandleImeEvent())
1693     return;
1694   ImeEventGuard guard(this);
1695   handling_input_event_ = true;
1696   if (text.length())
1697     webwidget_->confirmComposition(text);
1698   else if (keep_selection)
1699     webwidget_->confirmComposition(WebWidget::KeepSelection);
1700   else
1701     webwidget_->confirmComposition(WebWidget::DoNotKeepSelection);
1702   handling_input_event_ = false;
1703   UpdateCompositionInfo(true);
1704 }
1705
1706 void RenderWidget::OnRepaint(gfx::Size size_to_paint) {
1707   // During shutdown we can just ignore this message.
1708   if (!webwidget_)
1709     return;
1710
1711   // Even if the browser provides an empty damage rect, it's still expecting to
1712   // receive a repaint ack so just damage the entire widget bounds.
1713   if (size_to_paint.IsEmpty()) {
1714     size_to_paint = size_;
1715   }
1716
1717   set_next_paint_is_repaint_ack();
1718   if (compositor_)
1719     compositor_->SetNeedsRedrawRect(gfx::Rect(size_to_paint));
1720 }
1721
1722 void RenderWidget::OnSyntheticGestureCompleted() {
1723   DCHECK(!pending_synthetic_gesture_callbacks_.empty());
1724
1725   pending_synthetic_gesture_callbacks_.front().Run();
1726   pending_synthetic_gesture_callbacks_.pop();
1727 }
1728
1729 void RenderWidget::OnSetTextDirection(WebTextDirection direction) {
1730   if (!webwidget_)
1731     return;
1732   webwidget_->setTextDirection(direction);
1733 }
1734
1735 void RenderWidget::OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
1736                                        const gfx::Rect& window_screen_rect) {
1737   if (screen_metrics_emulator_) {
1738     screen_metrics_emulator_->OnUpdateScreenRectsMessage(
1739         view_screen_rect, window_screen_rect);
1740   } else {
1741     view_screen_rect_ = view_screen_rect;
1742     window_screen_rect_ = window_screen_rect;
1743   }
1744   Send(new ViewHostMsg_UpdateScreenRects_ACK(routing_id()));
1745 }
1746
1747 void RenderWidget::OnSetSurfaceIdNamespace(uint32_t surface_id_namespace) {
1748   if (compositor_)
1749     compositor_->SetSurfaceIdNamespace(surface_id_namespace);
1750 }
1751
1752 void RenderWidget::showImeIfNeeded() {
1753   OnShowImeIfNeeded();
1754 }
1755
1756 void RenderWidget::OnShowImeIfNeeded() {
1757 #if defined(OS_ANDROID) || defined(USE_AURA)
1758   UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
1759 #endif
1760
1761 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
1762 // virtual keyboard.
1763 #if !defined(OS_ANDROID)
1764   FocusChangeComplete();
1765 #endif
1766 }
1767
1768 #if defined(OS_ANDROID)
1769 void RenderWidget::OnImeEventSentForAck(const blink::WebTextInputInfo& info) {
1770   text_input_info_history_.push_back(info);
1771 }
1772
1773 void RenderWidget::OnImeEventAck() {
1774   DCHECK_GE(text_input_info_history_.size(), 1u);
1775   text_input_info_history_.pop_front();
1776 }
1777 #endif
1778
1779 bool RenderWidget::ShouldHandleImeEvent() {
1780 #if defined(OS_ANDROID)
1781   if (!webwidget_)
1782     return false;
1783
1784   // We cannot handle IME events if there is any chance that the event we are
1785   // receiving here from the browser is based on the state that is different
1786   // from our current one as indicated by |text_input_info_|.
1787   // The states the browser might be in are:
1788   // text_input_info_history_[0] - current state ack'd by browser
1789   // text_input_info_history_[1...N] - pending state changes
1790   for (size_t i = 0u; i < text_input_info_history_.size() - 1u; ++i) {
1791     if (text_input_info_history_[i] != text_input_info_)
1792       return false;
1793   }
1794   return true;
1795 #else
1796   return !!webwidget_;
1797 #endif
1798 }
1799
1800 bool RenderWidget::SendAckForMouseMoveFromDebugger() {
1801   if (handling_event_type_ == WebInputEvent::MouseMove) {
1802     // If we pause multiple times during a single mouse move event, we should
1803     // only send ACK once.
1804     if (!ignore_ack_for_mouse_move_from_debugger_) {
1805       InputEventAck ack(handling_event_type_, INPUT_EVENT_ACK_STATE_CONSUMED);
1806       Send(new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
1807       return true;
1808     }
1809   }
1810   return false;
1811 }
1812
1813 void RenderWidget::IgnoreAckForMouseMoveFromDebugger() {
1814   ignore_ack_for_mouse_move_from_debugger_ = true;
1815 }
1816
1817 void RenderWidget::SetDeviceScaleFactor(float device_scale_factor) {
1818   if (device_scale_factor_ == device_scale_factor)
1819     return;
1820
1821   device_scale_factor_ = device_scale_factor;
1822   ScheduleComposite();
1823 }
1824
1825 bool RenderWidget::SetDeviceColorProfile(
1826     const std::vector<char>& color_profile) {
1827   if (device_color_profile_ == color_profile)
1828     return false;
1829
1830   device_color_profile_ = color_profile;
1831   return true;
1832 }
1833
1834 void RenderWidget::ResetDeviceColorProfileForTesting() {
1835   if (!device_color_profile_.empty())
1836     device_color_profile_.clear();
1837   device_color_profile_.push_back('0');
1838 }
1839
1840 void RenderWidget::OnOrientationChange() {
1841 }
1842
1843 gfx::Vector2d RenderWidget::GetScrollOffset() {
1844   // Bare RenderWidgets don't support scroll offset.
1845   return gfx::Vector2d();
1846 }
1847
1848 void RenderWidget::SetHidden(bool hidden) {
1849   if (is_hidden_ == hidden)
1850     return;
1851
1852   // The status has changed.  Tell the RenderThread about it and ensure
1853   // throttled acks are released in case frame production ceases.
1854   is_hidden_ = hidden;
1855   FlushPendingInputEventAck();
1856
1857   if (is_hidden_)
1858     RenderThreadImpl::current()->WidgetHidden();
1859   else
1860     RenderThreadImpl::current()->WidgetRestored();
1861 }
1862
1863 void RenderWidget::DidToggleFullscreen() {
1864   if (!webwidget_)
1865     return;
1866
1867   if (is_fullscreen_granted_) {
1868     webwidget_->didEnterFullScreen();
1869   } else {
1870     webwidget_->didExitFullScreen();
1871   }
1872 }
1873
1874 bool RenderWidget::next_paint_is_resize_ack() const {
1875   return ViewHostMsg_UpdateRect_Flags::is_resize_ack(next_paint_flags_);
1876 }
1877
1878 void RenderWidget::set_next_paint_is_resize_ack() {
1879   next_paint_flags_ |= ViewHostMsg_UpdateRect_Flags::IS_RESIZE_ACK;
1880 }
1881
1882 void RenderWidget::set_next_paint_is_repaint_ack() {
1883   next_paint_flags_ |= ViewHostMsg_UpdateRect_Flags::IS_REPAINT_ACK;
1884 }
1885
1886 static bool IsDateTimeInput(ui::TextInputType type) {
1887   return type == ui::TEXT_INPUT_TYPE_DATE ||
1888       type == ui::TEXT_INPUT_TYPE_DATE_TIME ||
1889       type == ui::TEXT_INPUT_TYPE_DATE_TIME_LOCAL ||
1890       type == ui::TEXT_INPUT_TYPE_MONTH ||
1891       type == ui::TEXT_INPUT_TYPE_TIME ||
1892       type == ui::TEXT_INPUT_TYPE_WEEK;
1893 }
1894
1895
1896 void RenderWidget::StartHandlingImeEvent() {
1897   DCHECK(!handling_ime_event_);
1898   handling_ime_event_ = true;
1899 }
1900
1901 void RenderWidget::FinishHandlingImeEvent() {
1902   DCHECK(handling_ime_event_);
1903   handling_ime_event_ = false;
1904   // While handling an ime event, text input state and selection bounds updates
1905   // are ignored. These must explicitly be updated once finished handling the
1906   // ime event.
1907   UpdateSelectionBounds();
1908 #if defined(OS_ANDROID)
1909   UpdateTextInputState(NO_SHOW_IME, FROM_IME);
1910 #endif
1911 }
1912
1913 void RenderWidget::UpdateTextInputState(ShowIme show_ime,
1914                                         ChangeSource change_source) {
1915   TRACE_EVENT0("renderer", "RenderWidget::UpdateTextInputState");
1916   if (handling_ime_event_)
1917     return;
1918   ui::TextInputType new_type = GetTextInputType();
1919   if (IsDateTimeInput(new_type))
1920     return;  // Not considered as a text input field in WebKit/Chromium.
1921
1922   blink::WebTextInputInfo new_info;
1923   if (webwidget_)
1924     new_info = webwidget_->textInputInfo();
1925   const ui::TextInputMode new_mode = ConvertInputMode(new_info.inputMode);
1926
1927   bool new_can_compose_inline = CanComposeInline();
1928
1929   // Only sends text input params if they are changed or if the ime should be
1930   // shown.
1931   if (show_ime == SHOW_IME_IF_NEEDED ||
1932       (text_input_type_ != new_type ||
1933        text_input_mode_ != new_mode ||
1934        text_input_info_ != new_info ||
1935        can_compose_inline_ != new_can_compose_inline)
1936 #if defined(OS_ANDROID)
1937       || text_field_is_dirty_
1938 #endif
1939       ) {
1940     ViewHostMsg_TextInputState_Params params;
1941     params.type = new_type;
1942     params.mode = new_mode;
1943     params.flags = new_info.flags;
1944     params.value = new_info.value.utf8();
1945     params.selection_start = new_info.selectionStart;
1946     params.selection_end = new_info.selectionEnd;
1947     params.composition_start = new_info.compositionStart;
1948     params.composition_end = new_info.compositionEnd;
1949     params.can_compose_inline = new_can_compose_inline;
1950     params.show_ime_if_needed = (show_ime == SHOW_IME_IF_NEEDED);
1951 #if defined(USE_AURA)
1952     params.is_non_ime_change = true;
1953 #endif
1954 #if defined(OS_ANDROID)
1955     params.is_non_ime_change = (change_source == FROM_NON_IME) ||
1956                          text_field_is_dirty_;
1957     if (params.is_non_ime_change)
1958       OnImeEventSentForAck(new_info);
1959     text_field_is_dirty_ = false;
1960 #endif
1961     Send(new ViewHostMsg_TextInputStateChanged(routing_id(), params));
1962
1963     text_input_info_ = new_info;
1964     text_input_type_ = new_type;
1965     text_input_mode_ = new_mode;
1966     can_compose_inline_ = new_can_compose_inline;
1967     text_input_flags_ = new_info.flags;
1968   }
1969 }
1970
1971 void RenderWidget::GetSelectionBounds(gfx::Rect* focus, gfx::Rect* anchor) {
1972   WebRect focus_webrect;
1973   WebRect anchor_webrect;
1974   webwidget_->selectionBounds(focus_webrect, anchor_webrect);
1975   *focus = focus_webrect;
1976   *anchor = anchor_webrect;
1977 }
1978
1979 void RenderWidget::UpdateSelectionBounds() {
1980   TRACE_EVENT0("renderer", "RenderWidget::UpdateSelectionBounds");
1981   if (!webwidget_)
1982     return;
1983   if (handling_ime_event_)
1984     return;
1985
1986 #if defined(USE_AURA)
1987   // TODO(mohsen): For now, always send explicit selection IPC notifications for
1988   // Aura beucause composited selection updates are not working for webview tags
1989   // which regresses IME inside webview. Remove this when composited selection
1990   // updates are fixed for webviews. See, http://crbug.com/510568.
1991   bool send_ipc = true;
1992 #else
1993   // With composited selection updates, the selection bounds will be reported
1994   // directly by the compositor, in which case explicit IPC selection
1995   // notifications should be suppressed.
1996   bool send_ipc =
1997       !blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled();
1998 #endif
1999   if (send_ipc) {
2000     ViewHostMsg_SelectionBounds_Params params;
2001     GetSelectionBounds(&params.anchor_rect, &params.focus_rect);
2002     if (selection_anchor_rect_ != params.anchor_rect ||
2003         selection_focus_rect_ != params.focus_rect) {
2004       selection_anchor_rect_ = params.anchor_rect;
2005       selection_focus_rect_ = params.focus_rect;
2006       webwidget_->selectionTextDirection(params.focus_dir, params.anchor_dir);
2007       params.is_anchor_first = webwidget_->isSelectionAnchorFirst();
2008       Send(new ViewHostMsg_SelectionBoundsChanged(routing_id_, params));
2009     }
2010   }
2011
2012   UpdateCompositionInfo(false);
2013 }
2014
2015 // Check blink::WebTextInputType and ui::TextInputType is kept in sync.
2016 #define STATIC_ASSERT_WTIT_ENUM_MATCH(a, b)            \
2017     static_assert(int(blink::WebTextInputType##a)      \
2018                       == int(ui::TEXT_INPUT_TYPE_##b), \
2019                   "mismatching enums: " #a)
2020
2021 STATIC_ASSERT_WTIT_ENUM_MATCH(None,            NONE);
2022 STATIC_ASSERT_WTIT_ENUM_MATCH(Text,            TEXT);
2023 STATIC_ASSERT_WTIT_ENUM_MATCH(Password,        PASSWORD);
2024 STATIC_ASSERT_WTIT_ENUM_MATCH(Search,          SEARCH);
2025 STATIC_ASSERT_WTIT_ENUM_MATCH(Email,           EMAIL);
2026 STATIC_ASSERT_WTIT_ENUM_MATCH(Number,          NUMBER);
2027 STATIC_ASSERT_WTIT_ENUM_MATCH(Telephone,       TELEPHONE);
2028 STATIC_ASSERT_WTIT_ENUM_MATCH(URL,             URL);
2029 STATIC_ASSERT_WTIT_ENUM_MATCH(Date,            DATE);
2030 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTime,        DATE_TIME);
2031 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTimeLocal,   DATE_TIME_LOCAL);
2032 STATIC_ASSERT_WTIT_ENUM_MATCH(Month,           MONTH);
2033 STATIC_ASSERT_WTIT_ENUM_MATCH(Time,            TIME);
2034 STATIC_ASSERT_WTIT_ENUM_MATCH(Week,            WEEK);
2035 STATIC_ASSERT_WTIT_ENUM_MATCH(TextArea,        TEXT_AREA);
2036 STATIC_ASSERT_WTIT_ENUM_MATCH(ContentEditable, CONTENT_EDITABLE);
2037 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTimeField,   DATE_TIME_FIELD);
2038
2039 ui::TextInputType RenderWidget::WebKitToUiTextInputType(
2040     blink::WebTextInputType type) {
2041   // Check the type is in the range representable by ui::TextInputType.
2042   DCHECK_LE(type, static_cast<int>(ui::TEXT_INPUT_TYPE_MAX)) <<
2043     "blink::WebTextInputType and ui::TextInputType not synchronized";
2044   return static_cast<ui::TextInputType>(type);
2045 }
2046
2047 ui::TextInputType RenderWidget::GetTextInputType() {
2048   if (webwidget_)
2049     return WebKitToUiTextInputType(webwidget_->textInputInfo().type);
2050   return ui::TEXT_INPUT_TYPE_NONE;
2051 }
2052
2053 void RenderWidget::UpdateCompositionInfo(bool should_update_range) {
2054 #if defined(OS_ANDROID)
2055   // TODO(yukawa): Start sending character bounds when the browser side
2056   // implementation becomes ready (crbug.com/424866).
2057 #else
2058   TRACE_EVENT0("renderer", "RenderWidget::UpdateCompositionInfo");
2059   gfx::Range range = gfx::Range();
2060   if (should_update_range) {
2061     GetCompositionRange(&range);
2062   } else {
2063     range = composition_range_;
2064   }
2065   std::vector<gfx::Rect> character_bounds;
2066   GetCompositionCharacterBounds(&character_bounds);
2067
2068   if (!ShouldUpdateCompositionInfo(range, character_bounds))
2069     return;
2070   composition_character_bounds_ = character_bounds;
2071   composition_range_ = range;
2072   Send(new InputHostMsg_ImeCompositionRangeChanged(
2073       routing_id(), composition_range_, composition_character_bounds_));
2074 #endif
2075 }
2076
2077 void RenderWidget::GetCompositionCharacterBounds(
2078     std::vector<gfx::Rect>* bounds) {
2079   DCHECK(bounds);
2080   bounds->clear();
2081 }
2082
2083 void RenderWidget::GetCompositionRange(gfx::Range* range) {
2084   size_t location, length;
2085   if (webwidget_->compositionRange(&location, &length)) {
2086     range->set_start(location);
2087     range->set_end(location + length);
2088   } else if (webwidget_->caretOrSelectionRange(&location, &length)) {
2089     range->set_start(location);
2090     range->set_end(location + length);
2091   } else {
2092     *range = gfx::Range::InvalidRange();
2093   }
2094 }
2095
2096 bool RenderWidget::ShouldUpdateCompositionInfo(
2097     const gfx::Range& range,
2098     const std::vector<gfx::Rect>& bounds) {
2099   if (composition_range_ != range)
2100     return true;
2101   if (bounds.size() != composition_character_bounds_.size())
2102     return true;
2103   for (size_t i = 0; i < bounds.size(); ++i) {
2104     if (bounds[i] != composition_character_bounds_[i])
2105       return true;
2106   }
2107   return false;
2108 }
2109
2110 #if defined(OS_ANDROID)
2111 void RenderWidget::DidChangeBodyBackgroundColor(SkColor bg_color) {
2112   // If not initialized, default to white. Note that 0 is different from black
2113   // as black still has alpha 0xFF.
2114   if (!bg_color)
2115     bg_color = SK_ColorWHITE;
2116
2117   if (bg_color != body_background_color_) {
2118     body_background_color_ = bg_color;
2119     Send(new ViewHostMsg_DidChangeBodyBackgroundColor(routing_id(), bg_color));
2120   }
2121 }
2122
2123 bool RenderWidget::DoesRecordFullLayer() const {
2124   SynchronousCompositorFactory* synchronous_compositor_factory =
2125       SynchronousCompositorFactory::GetInstance();
2126
2127   // We assume that the absence of synchronous_compositor_factory
2128   // means we are in Chrome. In chrome, we want to clip, i.e.
2129   // *not* to record the full layer.
2130   if (!synchronous_compositor_factory)
2131     return false;
2132
2133   return synchronous_compositor_factory->RecordFullLayer();
2134 }
2135 #endif
2136
2137 bool RenderWidget::CanComposeInline() {
2138   return true;
2139 }
2140
2141 WebScreenInfo RenderWidget::screenInfo() {
2142   return screen_info_;
2143 }
2144
2145 float RenderWidget::deviceScaleFactor() {
2146   return device_scale_factor_;
2147 }
2148
2149 void RenderWidget::resetInputMethod() {
2150   ImeEventGuard guard(this);
2151   // If the last text input type is not None, then we should finish any
2152   // ongoing composition regardless of the new text input type.
2153   if (text_input_type_ != ui::TEXT_INPUT_TYPE_NONE) {
2154     // If a composition text exists, then we need to let the browser process
2155     // to cancel the input method's ongoing composition session.
2156     if (webwidget_->confirmComposition())
2157       Send(new InputHostMsg_ImeCancelComposition(routing_id()));
2158   }
2159
2160   UpdateCompositionInfo(true);
2161 }
2162
2163 #if defined(OS_ANDROID)
2164 void RenderWidget::showUnhandledTapUIIfNeeded(
2165     const WebPoint& tapped_position,
2166     const WebNode& tapped_node,
2167     bool page_changed) {
2168   DCHECK(handling_input_event_);
2169   bool should_trigger = !page_changed && tapped_node.isTextNode() &&
2170                         !tapped_node.isContentEditable() &&
2171                         !tapped_node.isInsideFocusableElementOrARIAWidget();
2172   if (should_trigger) {
2173     Send(new ViewHostMsg_ShowUnhandledTapUIIfNeeded(routing_id_,
2174         tapped_position.x, tapped_position.y));
2175   }
2176 }
2177 #endif
2178
2179 void RenderWidget::didHandleGestureEvent(
2180     const WebGestureEvent& event,
2181     bool event_cancelled) {
2182 #if defined(OS_ANDROID) || defined(USE_AURA)
2183   if (event_cancelled)
2184     return;
2185   if (event.type == WebInputEvent::GestureTap) {
2186     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
2187   } else if (event.type == WebInputEvent::GestureLongPress) {
2188     DCHECK(webwidget_);
2189     if (webwidget_->textInputInfo().value.isEmpty())
2190       UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
2191     else
2192       UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
2193   }
2194 #endif
2195 }
2196
2197 void RenderWidget::didOverscroll(
2198     const blink::WebFloatSize& unusedDelta,
2199     const blink::WebFloatSize& accumulatedRootOverScroll,
2200     const blink::WebFloatPoint& position,
2201     const blink::WebFloatSize& velocity) {
2202   DidOverscrollParams params;
2203   params.accumulated_overscroll = gfx::Vector2dF(
2204       accumulatedRootOverScroll.width, accumulatedRootOverScroll.height);
2205   params.latest_overscroll_delta =
2206       gfx::Vector2dF(unusedDelta.width, unusedDelta.height);
2207   // TODO(sataya.m): don't negate velocity once http://crbug.com/499743 is
2208   // fixed.
2209   params.current_fling_velocity =
2210       gfx::Vector2dF(-velocity.width, -velocity.height);
2211   params.causal_event_viewport_point = gfx::PointF(position.x, position.y);
2212
2213   // If we're currently handling an event, stash the overscroll data such that
2214   // it can be bundled in the event ack.
2215   if (handling_event_overscroll_) {
2216     handling_event_overscroll_->reset(new DidOverscrollParams(params));
2217     return;
2218   }
2219
2220   Send(new InputHostMsg_DidOverscroll(routing_id_, params));
2221 }
2222
2223 void RenderWidget::StartCompositor() {
2224   // For widgets that are never visible, we don't need the compositor to run
2225   // at all.
2226   if (never_visible_)
2227     return;
2228   // In tests without a RenderThreadImpl, don't set ready as this kicks
2229   // off creating output surfaces that the test can't create.
2230   if (!RenderThreadImpl::current())
2231     return;
2232   compositor_->StartCompositor();
2233 }
2234
2235 void RenderWidget::SchedulePluginMove(const WebPluginGeometry& move) {
2236   size_t i = 0;
2237   for (; i < plugin_window_moves_.size(); ++i) {
2238     if (plugin_window_moves_[i].window == move.window) {
2239       if (move.rects_valid) {
2240         plugin_window_moves_[i] = move;
2241       } else {
2242         plugin_window_moves_[i].visible = move.visible;
2243       }
2244       break;
2245     }
2246   }
2247
2248   if (i == plugin_window_moves_.size())
2249     plugin_window_moves_.push_back(move);
2250 }
2251
2252 void RenderWidget::CleanupWindowInPluginMoves(gfx::PluginWindowHandle window) {
2253   for (WebPluginGeometryVector::iterator i = plugin_window_moves_.begin();
2254        i != plugin_window_moves_.end(); ++i) {
2255     if (i->window == window) {
2256       plugin_window_moves_.erase(i);
2257       break;
2258     }
2259   }
2260 }
2261
2262
2263 RenderWidgetCompositor* RenderWidget::compositor() const {
2264   return compositor_.get();
2265 }
2266
2267 bool RenderWidget::WillHandleMouseEvent(const blink::WebMouseEvent& event) {
2268   return false;
2269 }
2270
2271 bool RenderWidget::WillHandleGestureEvent(
2272     const blink::WebGestureEvent& event) {
2273   return false;
2274 }
2275
2276 void RenderWidget::ObserveWheelEventAndResult(
2277     const blink::WebMouseWheelEvent& wheel_event,
2278     const gfx::Vector2dF& wheel_unused_delta,
2279     bool event_processed) {
2280   if (!compositor_deps_->IsElasticOverscrollEnabled())
2281     return;
2282
2283   cc::InputHandlerScrollResult scroll_result;
2284   scroll_result.did_scroll = event_processed;
2285   scroll_result.did_overscroll_root = !wheel_unused_delta.IsZero();
2286   scroll_result.unused_scroll_delta = wheel_unused_delta;
2287
2288   RenderThreadImpl* render_thread = RenderThreadImpl::current();
2289   InputHandlerManager* input_handler_manager =
2290       render_thread ? render_thread->input_handler_manager() : NULL;
2291   if (input_handler_manager) {
2292     input_handler_manager->ObserveWheelEventAndResultOnMainThread(
2293         routing_id_, wheel_event, scroll_result);
2294   }
2295 }
2296
2297 void RenderWidget::hasTouchEventHandlers(bool has_handlers) {
2298   Send(new ViewHostMsg_HasTouchEventHandlers(routing_id_, has_handlers));
2299 }
2300
2301 // Check blink::WebTouchAction and  blink::WebTouchActionAuto is kept in sync
2302 #define STATIC_ASSERT_WTI_ENUM_MATCH(a, b)                                         \
2303     static_assert(int(blink::WebTouchAction##a) == int(TOUCH_ACTION_##b), \
2304                   "mismatching enums: " #a)
2305
2306 inline content::TouchAction& operator|=(content::TouchAction& a,
2307                                         content::TouchAction b) {
2308   a = static_cast<content::TouchAction>(static_cast<int>(a) |
2309                                         static_cast<int>(b));
2310   return a;
2311 }
2312
2313 void RenderWidget::setTouchAction(
2314     blink::WebTouchAction web_touch_action) {
2315
2316   // Ignore setTouchAction calls that result from synthetic touch events (eg.
2317   // when blink is emulating touch with mouse).
2318   if (handling_event_type_ != WebInputEvent::TouchStart)
2319     return;
2320
2321   // Verify the same values are used by the types so we can cast between them.
2322    STATIC_ASSERT_WTI_ENUM_MATCH(Auto,      AUTO);
2323    STATIC_ASSERT_WTI_ENUM_MATCH(None,      NONE);
2324    STATIC_ASSERT_WTI_ENUM_MATCH(PanLeft,   PAN_LEFT);
2325    STATIC_ASSERT_WTI_ENUM_MATCH(PanRight,  PAN_RIGHT);
2326    STATIC_ASSERT_WTI_ENUM_MATCH(PanX,      PAN_X);
2327    STATIC_ASSERT_WTI_ENUM_MATCH(PanUp,     PAN_UP);
2328    STATIC_ASSERT_WTI_ENUM_MATCH(PanDown,   PAN_DOWN);
2329    STATIC_ASSERT_WTI_ENUM_MATCH(PanY,      PAN_Y);
2330    STATIC_ASSERT_WTI_ENUM_MATCH(PinchZoom, PINCH_ZOOM);
2331
2332    content::TouchAction content_touch_action =
2333        static_cast<content::TouchAction>(web_touch_action);
2334   Send(new InputHostMsg_SetTouchAction(routing_id_, content_touch_action));
2335 }
2336
2337 void RenderWidget::didUpdateTextOfFocusedElementByNonUserInput() {
2338 #if defined(OS_ANDROID)
2339   text_field_is_dirty_ = true;
2340 #endif
2341 }
2342
2343 bool RenderWidget::HasTouchEventHandlersAt(const gfx::Point& point) const {
2344   return true;
2345 }
2346
2347 scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
2348 RenderWidget::CreateGraphicsContext3D(bool compositor) {
2349   if (!webwidget_)
2350     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2351   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
2352           switches::kDisableGpuCompositing))
2353     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2354   if (!RenderThreadImpl::current())
2355     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2356   CauseForGpuLaunch cause =
2357       CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE;
2358   scoped_refptr<GpuChannelHost> gpu_channel_host(
2359       RenderThreadImpl::current()->EstablishGpuChannelSync(cause));
2360   if (!gpu_channel_host.get())
2361     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2362
2363   // Explicitly disable antialiasing for the compositor. As of the time of
2364   // this writing, the only platform that supported antialiasing for the
2365   // compositor was Mac OS X, because the on-screen OpenGL context creation
2366   // code paths on Windows and Linux didn't yet have multisampling support.
2367   // Mac OS X essentially always behaves as though it's rendering offscreen.
2368   // Multisampling has a heavy cost especially on devices with relatively low
2369   // fill rate like most notebooks, and the Mac implementation would need to
2370   // be optimized to resolve directly into the IOSurface shared between the
2371   // GPU and browser processes. For these reasons and to avoid platform
2372   // disparities we explicitly disable antialiasing.
2373   blink::WebGraphicsContext3D::Attributes attributes;
2374   attributes.antialias = false;
2375   attributes.shareResources = true;
2376   attributes.noAutomaticFlushes = true;
2377   attributes.depth = false;
2378   attributes.stencil = false;
2379   bool lose_context_when_out_of_memory = true;
2380   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
2381 #if defined(OS_ANDROID)
2382   // If we raster too fast we become upload bound, and pending
2383   // uploads consume memory. For maximum upload throughput, we would
2384   // want to allow for upload_throughput * pipeline_time of pending
2385   // uploads, after which we are just wasting memory. Since we don't
2386   // know our upload throughput yet, this just caps our memory usage.
2387   size_t divider = 1;
2388   if (base::SysInfo::IsLowEndDevice())
2389     divider = 6;
2390   // For reference Nexus10 can upload 1MB in about 2.5ms.
2391   const double max_mb_uploaded_per_ms = 2.0 / (5 * divider);
2392   // Deadline to draw a frame to achieve 60 frames per second.
2393   const size_t kMillisecondsPerFrame = 16;
2394   // Assuming a two frame deep pipeline between the CPU and the GPU.
2395   size_t max_transfer_buffer_usage_mb =
2396       static_cast<size_t>(2 * kMillisecondsPerFrame * max_mb_uploaded_per_ms);
2397   static const size_t kBytesPerMegabyte = 1024 * 1024;
2398   // We keep the MappedMemoryReclaimLimit the same as the upload limit
2399   // to avoid unnecessarily stalling the compositor thread.
2400   limits.mapped_memory_reclaim_limit =
2401       max_transfer_buffer_usage_mb * kBytesPerMegabyte;
2402 #endif
2403   if (compositor) {
2404     limits.command_buffer_size = 64 * 1024;
2405     limits.start_transfer_buffer_size = 64 * 1024;
2406     limits.min_transfer_buffer_size = 64 * 1024;
2407   }
2408
2409   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
2410       new WebGraphicsContext3DCommandBufferImpl(surface_id(),
2411                                                 GetURLForGraphicsContext3D(),
2412                                                 gpu_channel_host.get(),
2413                                                 attributes,
2414                                                 lose_context_when_out_of_memory,
2415                                                 limits,
2416                                                 NULL));
2417   return context.Pass();
2418 }
2419
2420 void RenderWidget::RegisterRenderFrameProxy(RenderFrameProxy* proxy) {
2421   render_frame_proxies_.AddObserver(proxy);
2422 }
2423
2424 void RenderWidget::UnregisterRenderFrameProxy(RenderFrameProxy* proxy) {
2425   render_frame_proxies_.RemoveObserver(proxy);
2426 }
2427
2428 void RenderWidget::RegisterRenderFrame(RenderFrameImpl* frame) {
2429   render_frames_.AddObserver(frame);
2430 }
2431
2432 void RenderWidget::UnregisterRenderFrame(RenderFrameImpl* frame) {
2433   render_frames_.RemoveObserver(frame);
2434 }
2435
2436 #if defined(VIDEO_HOLE)
2437 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
2438   video_hole_frames_.AddObserver(frame);
2439 }
2440
2441 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
2442   video_hole_frames_.RemoveObserver(frame);
2443 }
2444 #endif  // defined(VIDEO_HOLE)
2445
2446 }  // namespace content