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