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 "content/child/npapi/webplugin.h"
  26 #include "content/common/gpu/client/context_provider_command_buffer.h"
  27 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  28 #include "content/common/gpu/gpu_process_launch_causes.h"
  29 #include "content/common/input/synthetic_gesture_packet.h"
  30 #include "content/common/input/web_input_event_traits.h"
  31 #include "content/common/input_messages.h"
  32 #include "content/common/swapped_out_messages.h"
  33 #include "content/common/view_messages.h"
  34 #include "content/public/common/content_switches.h"
  35 #include "content/public/common/context_menu_params.h"
  36 #include "content/renderer/cursor_utils.h"
  37 #include "content/renderer/external_popup_menu.h"
  38 #include "content/renderer/gpu/compositor_output_surface.h"
  39 #include "content/renderer/gpu/compositor_software_output_device.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/WebPopupMenu.h"
  69 #include "third_party/WebKit/public/web/WebPopupMenuInfo.h"
  70 #include "third_party/WebKit/public/web/WebRange.h"
  71 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  72 #include "third_party/WebKit/public/web/WebView.h"
  73 #include "third_party/skia/include/core/SkShader.h"
  74 #include "ui/base/ui_base_switches.h"
  75 #include "ui/gfx/frame_time.h"
  76 #include "ui/gfx/geometry/point_conversions.h"
  77 #include "ui/gfx/geometry/rect_conversions.h"
  78 #include "ui/gfx/geometry/size_conversions.h"
  79 #include "ui/gfx/skia_util.h"
  80 #include "ui/gl/gl_switches.h"
  81 #include "ui/surface/transport_dib.h"
  82
  83 #if defined(OS_ANDROID)
  84 #include <android/keycodes.h>
  85 #include "content/renderer/android/synchronous_compositor_factory.h"
  86 #endif
  87
  88 #if defined(OS_POSIX)
  89 #include "ipc/ipc_channel_posix.h"
  90 #include "third_party/skia/include/core/SkMallocPixelRef.h"
  91 #include "third_party/skia/include/core/SkPixelRef.h"
  92 #endif  // defined(OS_POSIX)
  93
  94 #include "third_party/WebKit/public/web/WebWidget.h"
  95
  96 using blink::WebCompositionUnderline;
  97 using blink::WebCursorInfo;
  98 using blink::WebDeviceEmulationParams;
  99 using blink::WebGestureEvent;
 100 using blink::WebInputEvent;
 101 using blink::WebKeyboardEvent;
 102 using blink::WebMouseEvent;
 103 using blink::WebMouseWheelEvent;
 104 using blink::WebNavigationPolicy;
 105 using blink::WebNode;
 106 using blink::WebPagePopup;
 107 using blink::WebPoint;
 108 using blink::WebPopupMenu;
 109 using blink::WebPopupMenuInfo;
 110 using blink::WebPopupType;
 111 using blink::WebRange;
 112 using blink::WebRect;
 113 using blink::WebScreenInfo;
 114 using blink::WebSize;
 115 using blink::WebTextDirection;
 116 using blink::WebTouchEvent;
 117 using blink::WebTouchPoint;
 118 using blink::WebVector;
 119 using blink::WebWidget;
 120
 121 namespace {
 122
 123 typedef std::map<std::string, ui::TextInputMode> TextInputModeMap;
 124
 125 class TextInputModeMapSingleton {
 126  public:
 127   static TextInputModeMapSingleton* GetInstance() {
 128     return Singleton<TextInputModeMapSingleton>::get();
 129   }
 130   TextInputModeMapSingleton() {
 131     map_["verbatim"] = ui::TEXT_INPUT_MODE_VERBATIM;
 132     map_["latin"] = ui::TEXT_INPUT_MODE_LATIN;
 133     map_["latin-name"] = ui::TEXT_INPUT_MODE_LATIN_NAME;
 134     map_["latin-prose"] = ui::TEXT_INPUT_MODE_LATIN_PROSE;
 135     map_["full-width-latin"] = ui::TEXT_INPUT_MODE_FULL_WIDTH_LATIN;
 136     map_["kana"] = ui::TEXT_INPUT_MODE_KANA;
 137     map_["katakana"] = ui::TEXT_INPUT_MODE_KATAKANA;
 138     map_["numeric"] = ui::TEXT_INPUT_MODE_NUMERIC;
 139     map_["tel"] = ui::TEXT_INPUT_MODE_TEL;
 140     map_["email"] = ui::TEXT_INPUT_MODE_EMAIL;
 141     map_["url"] = ui::TEXT_INPUT_MODE_URL;
 142   }
 143   const TextInputModeMap& map() const { return map_; }
 144  private:
 145   TextInputModeMap map_;
 146
 147   friend struct DefaultSingletonTraits<TextInputModeMapSingleton>;
 148
 149   DISALLOW_COPY_AND_ASSIGN(TextInputModeMapSingleton);
 150 };
 151
 152 ui::TextInputMode ConvertInputMode(const blink::WebString& input_mode) {
 153   static TextInputModeMapSingleton* singleton =
 154       TextInputModeMapSingleton::GetInstance();
 155   TextInputModeMap::const_iterator it =
 156       singleton->map().find(input_mode.utf8());
 157   if (it == singleton->map().end())
 158     return ui::TEXT_INPUT_MODE_DEFAULT;
 159   return it->second;
 160 }
 161
 162 // TODO(brianderson): Replace the hard-coded threshold with a fraction of
 163 // the BeginMainFrame interval.
 164 // 4166us will allow 1/4 of a 60Hz interval or 1/2 of a 120Hz interval to
 165 // be spent in input hanlders before input starts getting throttled.
 166 const int kInputHandlingTimeThrottlingThresholdMicroseconds = 4166;
 167
 168 int64 GetEventLatencyMicros(const WebInputEvent& event, base::TimeTicks now) {
 169   return (now - base::TimeDelta::FromSecondsD(event.timeStampSeconds))
 170       .ToInternalValue();
 171 }
 172
 173 void LogInputEventLatencyUma(const WebInputEvent& event, base::TimeTicks now) {
 174   UMA_HISTOGRAM_CUSTOM_COUNTS(
 175       "Event.AggregatedLatency.Renderer2",
 176       GetEventLatencyMicros(event, now),
 177       1,
 178       10000000,
 179       100);
 180
 181 #define CASE_TYPE(t) \
 182     case WebInputEvent::t: \
 183       UMA_HISTOGRAM_CUSTOM_COUNTS( \
 184           "Event.Latency.Renderer2." #t, \
 185           GetEventLatencyMicros(event, now), \
 186           1, \
 187           10000000, \
 188           100); \
 189       break;
 190
 191   switch(event.type) {
 192     CASE_TYPE(Undefined);
 193     CASE_TYPE(MouseDown);
 194     CASE_TYPE(MouseUp);
 195     CASE_TYPE(MouseMove);
 196     CASE_TYPE(MouseEnter);
 197     CASE_TYPE(MouseLeave);
 198     CASE_TYPE(ContextMenu);
 199     CASE_TYPE(MouseWheel);
 200     CASE_TYPE(RawKeyDown);
 201     CASE_TYPE(KeyDown);
 202     CASE_TYPE(KeyUp);
 203     CASE_TYPE(Char);
 204     CASE_TYPE(GestureScrollBegin);
 205     CASE_TYPE(GestureScrollEnd);
 206     CASE_TYPE(GestureScrollUpdate);
 207     CASE_TYPE(GestureFlingStart);
 208     CASE_TYPE(GestureFlingCancel);
 209     CASE_TYPE(GestureShowPress);
 210     CASE_TYPE(GestureTap);
 211     CASE_TYPE(GestureTapUnconfirmed);
 212     CASE_TYPE(GestureTapDown);
 213     CASE_TYPE(GestureTapCancel);
 214     CASE_TYPE(GestureDoubleTap);
 215     CASE_TYPE(GestureTwoFingerTap);
 216     CASE_TYPE(GestureLongPress);
 217     CASE_TYPE(GestureLongTap);
 218     CASE_TYPE(GesturePinchBegin);
 219     CASE_TYPE(GesturePinchEnd);
 220     CASE_TYPE(GesturePinchUpdate);
 221     CASE_TYPE(TouchStart);
 222     CASE_TYPE(TouchMove);
 223     CASE_TYPE(TouchEnd);
 224     CASE_TYPE(TouchCancel);
 225     default:
 226       // Must include default to let blink::WebInputEvent add new event types
 227       // before they're added here.
 228       DLOG(WARNING) << "Unhandled WebInputEvent type: " << event.type;
 229       break;
 230   }
 231
 232 #undef CASE_TYPE
 233 }
 234
 235 }  // namespace
 236
 237 namespace content {
 238
 239 // RenderWidget::ScreenMetricsEmulator ----------------------------------------
 240
 241 class RenderWidget::ScreenMetricsEmulator {
 242  public:
 243   ScreenMetricsEmulator(
 244       RenderWidget* widget,
 245       const WebDeviceEmulationParams& params);
 246   virtual ~ScreenMetricsEmulator();
 247
 248   // Scale and offset used to convert between host coordinates
 249   // and webwidget coordinates.
 250   float scale() { return scale_; }
 251   gfx::Point offset() { return offset_; }
 252   gfx::Rect applied_widget_rect() const { return applied_widget_rect_; }
 253   gfx::Rect original_screen_rect() const { return original_view_screen_rect_; }
 254   const WebScreenInfo& original_screen_info() { return original_screen_info_; }
 255
 256   void ChangeEmulationParams(
 257       const WebDeviceEmulationParams& params);
 258
 259   // The following methods alter handlers' behavior for messages related to
 260   // widget size and position.
 261   void OnResizeMessage(const ViewMsg_Resize_Params& params);
 262   void OnUpdateScreenRectsMessage(const gfx::Rect& view_screen_rect,
 263                                   const gfx::Rect& window_screen_rect);
 264   void OnShowContextMenu(ContextMenuParams* params);
 265   gfx::Rect AdjustValidationMessageAnchor(const gfx::Rect& anchor);
 266
 267  private:
 268   void Reapply();
 269   void Apply(bool top_controls_shrink_blink_size,
 270              float top_controls_height,
 271              gfx::Rect resizer_rect,
 272              bool is_fullscreen);
 273
 274   RenderWidget* widget_;
 275
 276   // Parameters as passed by RenderWidget::EnableScreenMetricsEmulation.
 277   WebDeviceEmulationParams params_;
 278
 279   // The computed scale and offset used to fit widget into browser window.
 280   float scale_;
 281   gfx::Point offset_;
 282
 283   // Widget rect as passed to webwidget.
 284   gfx::Rect applied_widget_rect_;
 285
 286   // Original values to restore back after emulation ends.
 287   gfx::Size original_size_;
 288   gfx::Size original_physical_backing_size_;
 289   gfx::Size original_visible_viewport_size_;
 290   blink::WebScreenInfo original_screen_info_;
 291   gfx::Rect original_view_screen_rect_;
 292   gfx::Rect original_window_screen_rect_;
 293 };
 294
 295 RenderWidget::ScreenMetricsEmulator::ScreenMetricsEmulator(
 296     RenderWidget* widget,
 297     const WebDeviceEmulationParams& params)
 298     : widget_(widget),
 299       params_(params),
 300       scale_(1.f) {
 301   original_size_ = widget_->size_;
 302   original_physical_backing_size_ = widget_->physical_backing_size_;
 303   original_visible_viewport_size_ = widget_->visible_viewport_size_;
 304   original_screen_info_ = widget_->screen_info_;
 305   original_view_screen_rect_ = widget_->view_screen_rect_;
 306   original_window_screen_rect_ = widget_->window_screen_rect_;
 307   Apply(widget_->top_controls_shrink_blink_size_,
 308         widget_->top_controls_height_,
 309         widget_->resizer_rect_,
 310         widget_->is_fullscreen_);
 311 }
 312
 313 RenderWidget::ScreenMetricsEmulator::~ScreenMetricsEmulator() {
 314   widget_->screen_info_ = original_screen_info_;
 315
 316   widget_->SetDeviceScaleFactor(original_screen_info_.deviceScaleFactor);
 317   widget_->SetScreenMetricsEmulationParameters(0.f, gfx::Point(), 1.f);
 318   widget_->view_screen_rect_ = original_view_screen_rect_;
 319   widget_->window_screen_rect_ = original_window_screen_rect_;
 320   widget_->Resize(original_size_,
 321                   original_physical_backing_size_,
 322                   widget_->top_controls_shrink_blink_size_,
 323                   widget_->top_controls_height_,
 324                   original_visible_viewport_size_,
 325                   widget_->resizer_rect_,
 326                   widget_->is_fullscreen_,
 327                   NO_RESIZE_ACK);
 328 }
 329
 330 void RenderWidget::ScreenMetricsEmulator::ChangeEmulationParams(
 331     const WebDeviceEmulationParams& params) {
 332   params_ = params;
 333   Reapply();
 334 }
 335
 336 void RenderWidget::ScreenMetricsEmulator::Reapply() {
 337   Apply(widget_->top_controls_shrink_blink_size_,
 338         widget_->top_controls_height_,
 339         widget_->resizer_rect_,
 340         widget_->is_fullscreen_);
 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) {
 348   applied_widget_rect_.set_size(gfx::Size(params_.viewSize));
 349   if (!applied_widget_rect_.width())
 350     applied_widget_rect_.set_width(original_size_.width());
 351   if (!applied_widget_rect_.height())
 352     applied_widget_rect_.set_height(original_size_.height());
 353
 354   if (params_.fitToView && !original_size_.IsEmpty()) {
 355     int original_width = std::max(original_size_.width(), 1);
 356     int original_height = std::max(original_size_.height(), 1);
 357     float width_ratio =
 358         static_cast<float>(applied_widget_rect_.width()) / original_width;
 359     float height_ratio =
 360         static_cast<float>(applied_widget_rect_.height()) / original_height;
 361     float ratio = std::max(1.0f, std::max(width_ratio, height_ratio));
 362     scale_ = 1.f / ratio;
 363
 364     // Center emulated view inside available view space.
 365     offset_.set_x(
 366         (original_size_.width() - scale_ * applied_widget_rect_.width()) / 2);
 367     offset_.set_y(
 368         (original_size_.height() - scale_ * applied_widget_rect_.height()) / 2);
 369   } else {
 370     scale_ = params_.scale;
 371     offset_.SetPoint(params_.offset.x, params_.offset.y);
 372   }
 373
 374   if (params_.screenPosition == WebDeviceEmulationParams::Desktop) {
 375     applied_widget_rect_.set_origin(original_view_screen_rect_.origin());
 376     widget_->screen_info_.rect = original_screen_info_.rect;
 377     widget_->screen_info_.availableRect = original_screen_info_.availableRect;
 378     widget_->window_screen_rect_ = original_window_screen_rect_;
 379   } else {
 380     applied_widget_rect_.set_origin(gfx::Point(0, 0));
 381     widget_->screen_info_.rect = applied_widget_rect_;
 382     widget_->screen_info_.availableRect = applied_widget_rect_;
 383     widget_->window_screen_rect_ = applied_widget_rect_;
 384   }
 385
 386   float applied_device_scale_factor = params_.deviceScaleFactor ?
 387       params_.deviceScaleFactor : original_screen_info_.deviceScaleFactor;
 388   widget_->screen_info_.deviceScaleFactor = applied_device_scale_factor;
 389
 390   // Pass three emulation parameters to the blink side:
 391   // - we keep the real device scale factor in compositor to produce sharp image
 392   //   even when emulating different scale factor;
 393   // - in order to fit into view, WebView applies offset and scale to the
 394   //   root layer.
 395   widget_->SetScreenMetricsEmulationParameters(
 396       original_screen_info_.deviceScaleFactor, offset_, scale_);
 397
 398   widget_->SetDeviceScaleFactor(applied_device_scale_factor);
 399   widget_->view_screen_rect_ = applied_widget_rect_;
 400
 401   gfx::Size physical_backing_size = gfx::ToCeiledSize(gfx::ScaleSize(
 402       original_size_, original_screen_info_.deviceScaleFactor));
 403   widget_->Resize(applied_widget_rect_.size(),
 404                   physical_backing_size,
 405                   top_controls_shrink_blink_size,
 406                   top_controls_height,
 407                   applied_widget_rect_.size(),
 408                   resizer_rect,
 409                   is_fullscreen,
 410                   NO_RESIZE_ACK);
 411 }
 412
 413 void RenderWidget::ScreenMetricsEmulator::OnResizeMessage(
 414     const ViewMsg_Resize_Params& params) {
 415   bool need_ack = params.new_size != original_size_ &&
 416       !params.new_size.IsEmpty() && !params.physical_backing_size.IsEmpty();
 417   original_size_ = params.new_size;
 418   original_physical_backing_size_ = params.physical_backing_size;
 419   original_screen_info_ = params.screen_info;
 420   original_visible_viewport_size_ = params.visible_viewport_size;
 421   Apply(params.top_controls_shrink_blink_size,
 422         params.top_controls_height,
 423         params.resizer_rect,
 424         params.is_fullscreen);
 425
 426   if (need_ack) {
 427     widget_->set_next_paint_is_resize_ack();
 428     if (widget_->compositor_)
 429       widget_->compositor_->SetNeedsRedrawRect(gfx::Rect(widget_->size_));
 430   }
 431 }
 432
 433 void RenderWidget::ScreenMetricsEmulator::OnUpdateScreenRectsMessage(
 434     const gfx::Rect& view_screen_rect,
 435     const gfx::Rect& window_screen_rect) {
 436   original_view_screen_rect_ = view_screen_rect;
 437   original_window_screen_rect_ = window_screen_rect;
 438   if (params_.screenPosition == WebDeviceEmulationParams::Desktop)
 439     Reapply();
 440 }
 441
 442 void RenderWidget::ScreenMetricsEmulator::OnShowContextMenu(
 443     ContextMenuParams* params) {
 444   params->x *= scale_;
 445   params->x += offset_.x();
 446   params->y *= scale_;
 447   params->y += offset_.y();
 448 }
 449
 450 gfx::Rect RenderWidget::ScreenMetricsEmulator::AdjustValidationMessageAnchor(
 451     const gfx::Rect& anchor) {
 452   gfx::Rect scaled = gfx::ToEnclosedRect(gfx::ScaleRect(anchor, scale_));
 453   scaled.set_x(scaled.x() + offset_.x());
 454   scaled.set_y(scaled.y() + offset_.y());
 455   return scaled;
 456 }
 457
 458 // RenderWidget ---------------------------------------------------------------
 459
 460 RenderWidget::RenderWidget(blink::WebPopupType popup_type,
 461                            const blink::WebScreenInfo& screen_info,
 462                            bool swapped_out,
 463                            bool hidden,
 464                            bool never_visible)
 465     : routing_id_(MSG_ROUTING_NONE),
 466       surface_id_(0),
 467       compositor_deps_(nullptr),
 468       webwidget_(nullptr),
 469       opener_id_(MSG_ROUTING_NONE),
 470       init_complete_(false),
 471       top_controls_shrink_blink_size_(false),
 472       top_controls_height_(0.f),
 473       next_paint_flags_(0),
 474       auto_resize_mode_(false),
 475       need_update_rect_for_auto_resize_(false),
 476       did_show_(false),
 477       is_hidden_(hidden),
 478       never_visible_(never_visible),
 479       is_fullscreen_(false),
 480       has_focus_(false),
 481       handling_input_event_(false),
 482       handling_ime_event_(false),
 483       handling_event_type_(WebInputEvent::Undefined),
 484       ignore_ack_for_mouse_move_from_debugger_(false),
 485       closing_(false),
 486       host_closing_(false),
 487       is_swapped_out_(swapped_out),
 488       input_method_is_active_(false),
 489       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
 490       text_input_mode_(ui::TEXT_INPUT_MODE_DEFAULT),
 491       text_input_flags_(0),
 492       can_compose_inline_(true),
 493       popup_type_(popup_type),
 494       pending_window_rect_count_(0),
 495       suppress_next_char_events_(false),
 496       screen_info_(screen_info),
 497       device_scale_factor_(screen_info_.deviceScaleFactor),
 498       current_event_latency_info_(NULL),
 499       next_output_surface_id_(0),
 500 #if defined(OS_ANDROID)
 501       text_field_is_dirty_(false),
 502       outstanding_ime_acks_(0),
 503       body_background_color_(SK_ColorWHITE),
 504 #endif
 505       popup_origin_scale_for_emulation_(0.f),
 506       frame_swap_message_queue_(new FrameSwapMessageQueue()),
 507       resizing_mode_selector_(new ResizingModeSelector()),
 508       context_menu_source_type_(ui::MENU_SOURCE_MOUSE),
 509       has_host_context_menu_location_(false) {
 510   if (!swapped_out)
 511     RenderProcess::current()->AddRefProcess();
 512   DCHECK(RenderThread::Get());
 513   device_color_profile_.push_back('0');
 514 }
 515
 516 RenderWidget::~RenderWidget() {
 517   DCHECK(!webwidget_) << "Leaking our WebWidget!";
 518
 519   // If we are swapped out, we have released already.
 520   if (!is_swapped_out_ && RenderProcess::current())
 521     RenderProcess::current()->ReleaseProcess();
 522 }
 523
 524 // static
 525 RenderWidget* RenderWidget::Create(int32 opener_id,
 526                                    CompositorDependencies* compositor_deps,
 527                                    blink::WebPopupType popup_type,
 528                                    const blink::WebScreenInfo& screen_info) {
 529   DCHECK(opener_id != MSG_ROUTING_NONE);
 530   scoped_refptr<RenderWidget> widget(
 531       new RenderWidget(popup_type, screen_info, false, false, false));
 532   if (widget->Init(opener_id, compositor_deps)) {  // adds reference on success.
 533     return widget.get();
 534   }
 535   return NULL;
 536 }
 537
 538 // static
 539 RenderWidget* RenderWidget::CreateForFrame(
 540     int routing_id,
 541     int surface_id,
 542     bool hidden,
 543     const blink::WebScreenInfo& screen_info,
 544     CompositorDependencies* compositor_deps,
 545     blink::WebLocalFrame* frame) {
 546   CHECK_NE(routing_id, MSG_ROUTING_NONE);
 547   scoped_refptr<RenderWidget> widget(new RenderWidget(
 548       blink::WebPopupTypeNone, screen_info, false, hidden, false));
 549   widget->routing_id_ = routing_id;
 550   widget->surface_id_ = surface_id;
 551   widget->compositor_deps_ = compositor_deps;
 552   // DoInit increments the reference count on |widget|, keeping it alive after
 553   // this function returns.
 554   if (widget->DoInit(MSG_ROUTING_NONE, compositor_deps,
 555                      RenderWidget::CreateWebFrameWidget(widget.get(), frame),
 556                      nullptr)) {
 557     widget->CompleteInit();
 558     return widget.get();
 559   }
 560   return nullptr;
 561 }
 562
 563 // static
 564 blink::WebWidget* RenderWidget::CreateWebWidget(RenderWidget* render_widget) {
 565   switch (render_widget->popup_type_) {
 566     case blink::WebPopupTypeNone:  // Nothing to create.
 567       break;
 568     case blink::WebPopupTypeSelect:
 569     case blink::WebPopupTypeSuggestion:
 570       return WebPopupMenu::create(render_widget);
 571     case blink::WebPopupTypePage:
 572       return WebPagePopup::create(render_widget);
 573     default:
 574       NOTREACHED();
 575   }
 576   return NULL;
 577 }
 578
 579 // static
 580 blink::WebWidget* RenderWidget::CreateWebFrameWidget(
 581     RenderWidget* render_widget,
 582     blink::WebLocalFrame* frame) {
 583   return blink::WebFrameWidget::create(render_widget, frame);
 584 }
 585
 586 bool RenderWidget::Init(int32 opener_id,
 587                         CompositorDependencies* compositor_deps) {
 588   return DoInit(opener_id, compositor_deps, RenderWidget::CreateWebWidget(this),
 589                 new ViewHostMsg_CreateWidget(opener_id, popup_type_,
 590                                              &routing_id_, &surface_id_));
 591 }
 592
 593 bool RenderWidget::DoInit(int32 opener_id,
 594                           CompositorDependencies* compositor_deps,
 595                           WebWidget* web_widget,
 596                           IPC::SyncMessage* create_widget_message) {
 597   DCHECK(!webwidget_);
 598
 599   if (opener_id != MSG_ROUTING_NONE)
 600     opener_id_ = opener_id;
 601
 602   compositor_deps_ = compositor_deps;
 603   webwidget_ = web_widget;
 604
 605   bool result = true;
 606   if (create_widget_message)
 607     result = RenderThread::Get()->Send(create_widget_message);
 608
 609   if (result) {
 610     RenderThread::Get()->AddRoute(routing_id_, this);
 611     // Take a reference on behalf of the RenderThread.  This will be balanced
 612     // when we receive ViewMsg_Close.
 613     AddRef();
 614     if (RenderThreadImpl::current()) {
 615       RenderThreadImpl::current()->WidgetCreated();
 616       if (is_hidden_)
 617         RenderThreadImpl::current()->WidgetHidden();
 618     }
 619     return true;
 620   } else {
 621     // The above Send can fail when the tab is closing.
 622     return false;
 623   }
 624 }
 625
 626 // This is used to complete pending inits and non-pending inits.
 627 void RenderWidget::CompleteInit() {
 628   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 629
 630   init_complete_ = true;
 631
 632   if (compositor_)
 633     StartCompositor();
 634
 635   Send(new ViewHostMsg_RenderViewReady(routing_id_));
 636 }
 637
 638 void RenderWidget::SetSwappedOut(bool is_swapped_out) {
 639   // We should only toggle between states.
 640   DCHECK(is_swapped_out_ != is_swapped_out);
 641   is_swapped_out_ = is_swapped_out;
 642
 643   // If we are swapping out, we will call ReleaseProcess, allowing the process
 644   // to exit if all of its RenderViews are swapped out.  We wait until the
 645   // WasSwappedOut call to do this, to allow the unload handler to finish.
 646   // If we are swapping in, we call AddRefProcess to prevent the process from
 647   // exiting.
 648   if (!is_swapped_out_)
 649     RenderProcess::current()->AddRefProcess();
 650 }
 651
 652 void RenderWidget::WasSwappedOut() {
 653   // If we have been swapped out and no one else is using this process,
 654   // it's safe to exit now.
 655   CHECK(is_swapped_out_);
 656   RenderProcess::current()->ReleaseProcess();
 657 }
 658
 659 void RenderWidget::EnableScreenMetricsEmulation(
 660     const WebDeviceEmulationParams& params) {
 661   if (!screen_metrics_emulator_)
 662     screen_metrics_emulator_.reset(new ScreenMetricsEmulator(this, params));
 663   else
 664     screen_metrics_emulator_->ChangeEmulationParams(params);
 665 }
 666
 667 void RenderWidget::DisableScreenMetricsEmulation() {
 668   screen_metrics_emulator_.reset();
 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     float device_scale_factor,
 690     const gfx::Point& root_layer_offset,
 691     float root_layer_scale) {
 692   // This is only supported in RenderView.
 693   NOTREACHED();
 694 }
 695
 696 #if defined(OS_MACOSX) || defined(OS_ANDROID)
 697 void RenderWidget::SetExternalPopupOriginAdjustmentsForEmulation(
 698     ExternalPopupMenu* popup, ScreenMetricsEmulator* emulator) {
 699   popup->SetOriginScaleAndOffsetForEmulation(
 700       emulator->scale(), emulator->offset());
 701 }
 702 #endif
 703
 704 void RenderWidget::OnShowHostContextMenu(ContextMenuParams* params) {
 705   if (screen_metrics_emulator_)
 706     screen_metrics_emulator_->OnShowContextMenu(params);
 707 }
 708
 709 void RenderWidget::ScheduleCompositeWithForcedRedraw() {
 710   if (compositor_) {
 711     // Regardless of whether threaded compositing is enabled, always
 712     // use this mechanism to force the compositor to redraw. However,
 713     // the invalidation code path below is still needed for the
 714     // non-threaded case.
 715     compositor_->SetNeedsForcedRedraw();
 716   }
 717   scheduleComposite();
 718 }
 719
 720 bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
 721   bool handled = true;
 722   IPC_BEGIN_MESSAGE_MAP(RenderWidget, message)
 723     IPC_MESSAGE_HANDLER(InputMsg_HandleInputEvent, OnHandleInputEvent)
 724     IPC_MESSAGE_HANDLER(InputMsg_CursorVisibilityChange,
 725                         OnCursorVisibilityChange)
 726     IPC_MESSAGE_HANDLER(InputMsg_ImeSetComposition, OnImeSetComposition)
 727     IPC_MESSAGE_HANDLER(InputMsg_ImeConfirmComposition, OnImeConfirmComposition)
 728     IPC_MESSAGE_HANDLER(InputMsg_MouseCaptureLost, OnMouseCaptureLost)
 729     IPC_MESSAGE_HANDLER(InputMsg_SetFocus, OnSetFocus)
 730     IPC_MESSAGE_HANDLER(InputMsg_SyntheticGestureCompleted,
 731                         OnSyntheticGestureCompleted)
 732     IPC_MESSAGE_HANDLER(ViewMsg_Close, OnClose)
 733     IPC_MESSAGE_HANDLER(ViewMsg_CreatingNew_ACK, OnCreatingNewAck)
 734     IPC_MESSAGE_HANDLER(ViewMsg_Resize, OnResize)
 735     IPC_MESSAGE_HANDLER(ViewMsg_ColorProfile, OnColorProfile)
 736     IPC_MESSAGE_HANDLER(ViewMsg_ChangeResizeRect, OnChangeResizeRect)
 737     IPC_MESSAGE_HANDLER(ViewMsg_WasHidden, OnWasHidden)
 738     IPC_MESSAGE_HANDLER(ViewMsg_WasShown, OnWasShown)
 739     IPC_MESSAGE_HANDLER(ViewMsg_SetInputMethodActive, OnSetInputMethodActive)
 740     IPC_MESSAGE_HANDLER(ViewMsg_CandidateWindowShown, OnCandidateWindowShown)
 741     IPC_MESSAGE_HANDLER(ViewMsg_CandidateWindowUpdated,
 742                         OnCandidateWindowUpdated)
 743     IPC_MESSAGE_HANDLER(ViewMsg_CandidateWindowHidden, OnCandidateWindowHidden)
 744     IPC_MESSAGE_HANDLER(ViewMsg_Repaint, OnRepaint)
 745     IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
 746     IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
 747     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScreenRects, OnUpdateScreenRects)
 748 #if defined(OS_ANDROID)
 749     IPC_MESSAGE_HANDLER(ViewMsg_ShowImeIfNeeded, OnShowImeIfNeeded)
 750     IPC_MESSAGE_HANDLER(ViewMsg_ImeEventAck, OnImeEventAck)
 751 #endif
 752     IPC_MESSAGE_UNHANDLED(handled = false)
 753   IPC_END_MESSAGE_MAP()
 754   return handled;
 755 }
 756
 757 bool RenderWidget::Send(IPC::Message* message) {
 758   // Don't send any messages after the browser has told us to close, and filter
 759   // most outgoing messages while swapped out.
 760   if ((is_swapped_out_ &&
 761        !SwappedOutMessages::CanSendWhileSwappedOut(message)) ||
 762       closing_) {
 763     delete message;
 764     return false;
 765   }
 766
 767   // If given a messsage without a routing ID, then assign our routing ID.
 768   if (message->routing_id() == MSG_ROUTING_NONE)
 769     message->set_routing_id(routing_id_);
 770
 771   return RenderThread::Get()->Send(message);
 772 }
 773
 774 void RenderWidget::Resize(const gfx::Size& new_size,
 775                           const gfx::Size& physical_backing_size,
 776                           bool top_controls_shrink_blink_size,
 777                           float top_controls_height,
 778                           const gfx::Size& visible_viewport_size,
 779                           const gfx::Rect& resizer_rect,
 780                           bool is_fullscreen,
 781                           ResizeAck resize_ack) {
 782   if (resizing_mode_selector_->NeverUsesSynchronousResize()) {
 783     // A resize ack shouldn't be requested if we have not ACK'd the previous
 784     // one.
 785     DCHECK(resize_ack != SEND_RESIZE_ACK || !next_paint_is_resize_ack());
 786     DCHECK(resize_ack == SEND_RESIZE_ACK || resize_ack == NO_RESIZE_ACK);
 787   }
 788
 789   // Ignore this during shutdown.
 790   if (!webwidget_)
 791     return;
 792
 793   if (compositor_) {
 794     compositor_->setViewportSize(new_size, physical_backing_size);
 795     compositor_->SetTopControlsShrinkBlinkSize(top_controls_shrink_blink_size);
 796     compositor_->SetTopControlsHeight(top_controls_height);
 797   }
 798
 799   physical_backing_size_ = physical_backing_size;
 800   top_controls_shrink_blink_size_ = top_controls_shrink_blink_size;
 801   top_controls_height_ = top_controls_height;
 802   visible_viewport_size_ = visible_viewport_size;
 803   resizer_rect_ = resizer_rect;
 804
 805   // NOTE: We may have entered fullscreen mode without changing our size.
 806   bool fullscreen_change = is_fullscreen_ != is_fullscreen;
 807   if (fullscreen_change)
 808     WillToggleFullscreen();
 809   is_fullscreen_ = is_fullscreen;
 810
 811   webwidget_->setTopControlsLayoutHeight(top_controls_shrink_blink_size_
 812       ? top_controls_height : 0.f);
 813
 814   if (size_ != new_size) {
 815     size_ = new_size;
 816
 817     // When resizing, we want to wait to paint before ACK'ing the resize.  This
 818     // ensures that we only resize as fast as we can paint.  We only need to
 819     // send an ACK if we are resized to a non-empty rect.
 820     webwidget_->resize(new_size);
 821   } else if (!resizing_mode_selector_->is_synchronous_mode()) {
 822     resize_ack = NO_RESIZE_ACK;
 823   }
 824
 825   webwidget()->resizePinchViewport(gfx::Size(
 826       visible_viewport_size.width(),
 827       visible_viewport_size.height()));
 828
 829   if (new_size.IsEmpty() || physical_backing_size.IsEmpty()) {
 830     // For empty size or empty physical_backing_size, there is no next paint
 831     // (along with which to send the ack) until they are set to non-empty.
 832     resize_ack = NO_RESIZE_ACK;
 833   }
 834
 835   // Send the Resize_ACK flag once we paint again if requested.
 836   if (resize_ack == SEND_RESIZE_ACK)
 837     set_next_paint_is_resize_ack();
 838
 839   if (fullscreen_change)
 840     DidToggleFullscreen();
 841
 842   // If a resize ack is requested and it isn't set-up, then no more resizes will
 843   // come in and in general things will go wrong.
 844   DCHECK(resize_ack != SEND_RESIZE_ACK || next_paint_is_resize_ack());
 845 }
 846
 847 void RenderWidget::SetWindowRectSynchronously(
 848     const gfx::Rect& new_window_rect) {
 849   Resize(new_window_rect.size(),
 850          new_window_rect.size(),
 851          top_controls_shrink_blink_size_,
 852          top_controls_height_,
 853          new_window_rect.size(),
 854          gfx::Rect(),
 855          is_fullscreen_,
 856          NO_RESIZE_ACK);
 857   view_screen_rect_ = new_window_rect;
 858   window_screen_rect_ = new_window_rect;
 859   if (!did_show_)
 860     initial_rect_ = new_window_rect;
 861 }
 862
 863 void RenderWidget::OnClose() {
 864   if (closing_)
 865     return;
 866   closing_ = true;
 867
 868   // Browser correspondence is no longer needed at this point.
 869   if (routing_id_ != MSG_ROUTING_NONE) {
 870     if (RenderThreadImpl::current())
 871       RenderThreadImpl::current()->WidgetDestroyed();
 872     RenderThread::Get()->RemoveRoute(routing_id_);
 873     SetHidden(false);
 874   }
 875
 876   // If there is a Send call on the stack, then it could be dangerous to close
 877   // now.  Post a task that only gets invoked when there are no nested message
 878   // loops.
 879   RenderThread::Get()->GetTaskRunner()->PostNonNestableTask(
 880       FROM_HERE, base::Bind(&RenderWidget::Close, this));
 881
 882   // Balances the AddRef taken when we called AddRoute.
 883   Release();
 884 }
 885
 886 // Got a response from the browser after the renderer decided to create a new
 887 // view.
 888 void RenderWidget::OnCreatingNewAck() {
 889   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 890
 891   CompleteInit();
 892 }
 893
 894 void RenderWidget::OnResize(const ViewMsg_Resize_Params& params) {
 895   if (resizing_mode_selector_->ShouldAbortOnResize(this, params))
 896     return;
 897
 898   if (screen_metrics_emulator_) {
 899     screen_metrics_emulator_->OnResizeMessage(params);
 900     return;
 901   }
 902
 903   bool orientation_changed =
 904       screen_info_.orientationAngle != params.screen_info.orientationAngle;
 905
 906   screen_info_ = params.screen_info;
 907   SetDeviceScaleFactor(screen_info_.deviceScaleFactor);
 908   Resize(params.new_size,
 909          params.physical_backing_size,
 910          params.top_controls_shrink_blink_size,
 911          params.top_controls_height,
 912          params.visible_viewport_size,
 913          params.resizer_rect,
 914          params.is_fullscreen,
 915          SEND_RESIZE_ACK);
 916
 917   if (orientation_changed)
 918     OnOrientationChange();
 919 }
 920
 921 void RenderWidget::OnColorProfile(const std::vector<char>& color_profile) {
 922   SetDeviceColorProfile(color_profile);
 923 }
 924
 925 void RenderWidget::OnChangeResizeRect(const gfx::Rect& resizer_rect) {
 926   if (resizer_rect_ == resizer_rect)
 927     return;
 928   resizer_rect_ = resizer_rect;
 929   if (webwidget_)
 930     webwidget_->didChangeWindowResizerRect();
 931 }
 932
 933 void RenderWidget::OnWasHidden() {
 934   TRACE_EVENT0("renderer", "RenderWidget::OnWasHidden");
 935   // Go into a mode where we stop generating paint and scrolling events.
 936   SetHidden(true);
 937   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
 938                     WasHidden());
 939 }
 940
 941 void RenderWidget::OnWasShown(bool needs_repainting,
 942                               const ui::LatencyInfo& latency_info) {
 943   TRACE_EVENT0("renderer", "RenderWidget::OnWasShown");
 944   // During shutdown we can just ignore this message.
 945   if (!webwidget_)
 946     return;
 947
 948   // See OnWasHidden
 949   SetHidden(false);
 950   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
 951                     WasShown());
 952
 953   if (!needs_repainting)
 954     return;
 955
 956   // Generate a full repaint.
 957   if (compositor_) {
 958     ui::LatencyInfo swap_latency_info(latency_info);
 959     scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor(
 960         compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info));
 961     compositor_->SetNeedsForcedRedraw();
 962   }
 963   scheduleComposite();
 964 }
 965
 966 void RenderWidget::OnRequestMoveAck() {
 967   DCHECK(pending_window_rect_count_);
 968   pending_window_rect_count_--;
 969 }
 970
 971 GURL RenderWidget::GetURLForGraphicsContext3D() {
 972   return GURL();
 973 }
 974
 975 scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(bool fallback) {
 976   // For widgets that are never visible, we don't start the compositor, so we
 977   // never get a request for a cc::OutputSurface.
 978   DCHECK(!never_visible_);
 979
 980 #if defined(OS_ANDROID)
 981   if (SynchronousCompositorFactory* factory =
 982       SynchronousCompositorFactory::GetInstance()) {
 983     return factory->CreateOutputSurface(routing_id(),
 984                                         frame_swap_message_queue_);
 985   }
 986 #endif
 987
 988   const base::CommandLine& command_line =
 989       *base::CommandLine::ForCurrentProcess();
 990   bool use_software = fallback;
 991   if (command_line.HasSwitch(switches::kDisableGpuCompositing))
 992     use_software = true;
 993
 994   scoped_refptr<ContextProviderCommandBuffer> context_provider;
 995   if (!use_software) {
 996     context_provider = ContextProviderCommandBuffer::Create(
 997         CreateGraphicsContext3D(), "RenderCompositor");
 998     if (!context_provider.get()) {
 999       // Cause the compositor to wait and try again.
1000       return scoped_ptr<cc::OutputSurface>();
1001     }
1002   }
1003
1004   uint32 output_surface_id = next_output_surface_id_++;
1005   if (command_line.HasSwitch(switches::kEnableDelegatedRenderer)) {
1006     DCHECK(compositor_deps_->GetCompositorImplThreadTaskRunner());
1007     return scoped_ptr<cc::OutputSurface>(
1008         new DelegatedCompositorOutputSurface(routing_id(),
1009                                              output_surface_id,
1010                                              context_provider,
1011                                              frame_swap_message_queue_));
1012   }
1013   if (!context_provider.get()) {
1014     scoped_ptr<cc::SoftwareOutputDevice> software_device(
1015         new CompositorSoftwareOutputDevice());
1016
1017     return scoped_ptr<cc::OutputSurface>(
1018         new CompositorOutputSurface(routing_id(),
1019                                     output_surface_id,
1020                                     NULL,
1021                                     software_device.Pass(),
1022                                     frame_swap_message_queue_,
1023                                     true));
1024   }
1025
1026   if (command_line.HasSwitch(cc::switches::kCompositeToMailbox)) {
1027     // Composite-to-mailbox is currently used for layout tests in order to cause
1028     // them to draw inside in the renderer to do the readback there. This should
1029     // no longer be the case when crbug.com/311404 is fixed.
1030     DCHECK(RenderThreadImpl::current()->layout_test_mode());
1031     cc::ResourceFormat format = cc::RGBA_8888;
1032     if (base::SysInfo::IsLowEndDevice())
1033       format = cc::RGB_565;
1034     return scoped_ptr<cc::OutputSurface>(
1035         new MailboxOutputSurface(routing_id(),
1036                                  output_surface_id,
1037                                  context_provider,
1038                                  scoped_ptr<cc::SoftwareOutputDevice>(),
1039                                  frame_swap_message_queue_,
1040                                  format));
1041   }
1042   bool use_swap_compositor_frame_message = false;
1043   return scoped_ptr<cc::OutputSurface>(
1044       new CompositorOutputSurface(routing_id(),
1045                                   output_surface_id,
1046                                   context_provider,
1047                                   scoped_ptr<cc::SoftwareOutputDevice>(),
1048                                   frame_swap_message_queue_,
1049                                   use_swap_compositor_frame_message));
1050 }
1051
1052 void RenderWidget::OnSwapBuffersAborted() {
1053   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersAborted");
1054   // Schedule another frame so the compositor learns about it.
1055   scheduleComposite();
1056 }
1057
1058 void RenderWidget::OnSwapBuffersPosted() {
1059   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersPosted");
1060 }
1061
1062 void RenderWidget::OnSwapBuffersComplete() {
1063   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersComplete");
1064
1065   // Notify subclasses that composited rendering was flushed to the screen.
1066   DidFlushPaint();
1067 }
1068
1069 void RenderWidget::OnHandleInputEvent(const blink::WebInputEvent* input_event,
1070                                       const ui::LatencyInfo& latency_info,
1071                                       bool is_keyboard_shortcut) {
1072   base::AutoReset<bool> handling_input_event_resetter(
1073       &handling_input_event_, true);
1074   if (!input_event)
1075     return;
1076   base::AutoReset<WebInputEvent::Type> handling_event_type_resetter(
1077       &handling_event_type_, input_event->type);
1078 #if defined(OS_ANDROID)
1079   // On Android, when a key is pressed or sent from the Keyboard using IME,
1080   // |AdapterInputConnection| generates input key events to make sure all JS
1081   // listeners that monitor KeyUp and KeyDown events receive the proper key
1082   // code. Since this input key event comes from IME, we need to set the
1083   // IME event guard here to make sure it does not interfere with other IME
1084   // events.
1085   scoped_ptr<ImeEventGuard> ime_event_guard_maybe;
1086   if (WebInputEvent::isKeyboardEventType(input_event->type)) {
1087     const WebKeyboardEvent& key_event =
1088         *static_cast<const WebKeyboardEvent*>(input_event);
1089     // Some keys are special and it's essential that no events get blocked.
1090     if (key_event.nativeKeyCode != AKEYCODE_TAB &&
1091         key_event.nativeKeyCode != AKEYCODE_DPAD_CENTER &&
1092         key_event.nativeKeyCode != AKEYCODE_DPAD_LEFT &&
1093         key_event.nativeKeyCode != AKEYCODE_DPAD_RIGHT &&
1094         key_event.nativeKeyCode != AKEYCODE_DPAD_UP &&
1095         key_event.nativeKeyCode != AKEYCODE_DPAD_DOWN)
1096       ime_event_guard_maybe.reset(new ImeEventGuard(this));
1097   }
1098 #endif
1099
1100   base::AutoReset<const ui::LatencyInfo*> resetter(&current_event_latency_info_,
1101                                                    &latency_info);
1102
1103   base::TimeTicks start_time;
1104   if (base::TimeTicks::IsHighResolution())
1105     start_time = base::TimeTicks::Now();
1106
1107   TRACE_EVENT1("renderer,benchmark", "RenderWidget::OnHandleInputEvent",
1108                "event", WebInputEventTraits::GetName(input_event->type));
1109   TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("blink.HandleInputEvent");
1110   TRACE_EVENT_FLOW_STEP0(
1111       "input,benchmark",
1112       "LatencyInfo.Flow",
1113       TRACE_ID_DONT_MANGLE(latency_info.trace_id),
1114       "HanldeInputEventMain");
1115
1116   // If we don't have a high res timer, these metrics won't be accurate enough
1117   // to be worth collecting. Note that this does introduce some sampling bias.
1118   if (!start_time.is_null())
1119     LogInputEventLatencyUma(*input_event, start_time);
1120
1121   scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor;
1122   ui::LatencyInfo swap_latency_info(latency_info);
1123   if (compositor_) {
1124     latency_info_swap_promise_monitor =
1125         compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info)
1126             .Pass();
1127   }
1128
1129   bool prevent_default = false;
1130   if (WebInputEvent::isMouseEventType(input_event->type)) {
1131     const WebMouseEvent& mouse_event =
1132         *static_cast<const WebMouseEvent*>(input_event);
1133     TRACE_EVENT2("renderer", "HandleMouseMove",
1134                  "x", mouse_event.x, "y", mouse_event.y);
1135     context_menu_source_type_ = ui::MENU_SOURCE_MOUSE;
1136     prevent_default = WillHandleMouseEvent(mouse_event);
1137   }
1138
1139   if (WebInputEvent::isKeyboardEventType(input_event->type)) {
1140     context_menu_source_type_ = ui::MENU_SOURCE_KEYBOARD;
1141 #if defined(OS_ANDROID)
1142     // The DPAD_CENTER key on Android has a dual semantic: (1) in the general
1143     // case it should behave like a select key (i.e. causing a click if a button
1144     // is focused). However, if a text field is focused (2), its intended
1145     // behavior is to just show the IME and don't propagate the key.
1146     // A typical use case is a web form: the DPAD_CENTER should bring up the IME
1147     // when clicked on an input text field and cause the form submit if clicked
1148     // when the submit button is focused, but not vice-versa.
1149     // The UI layer takes care of translating DPAD_CENTER into a RETURN key,
1150     // but at this point we have to swallow the event for the scenario (2).
1151     const WebKeyboardEvent& key_event =
1152         *static_cast<const WebKeyboardEvent*>(input_event);
1153     if (key_event.nativeKeyCode == AKEYCODE_DPAD_CENTER &&
1154         GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE) {
1155       OnShowImeIfNeeded();
1156       prevent_default = true;
1157     }
1158 #endif
1159   }
1160
1161   if (WebInputEvent::isGestureEventType(input_event->type)) {
1162     const WebGestureEvent& gesture_event =
1163         *static_cast<const WebGestureEvent*>(input_event);
1164     context_menu_source_type_ = ui::MENU_SOURCE_TOUCH;
1165     prevent_default = prevent_default || WillHandleGestureEvent(gesture_event);
1166   }
1167
1168   bool processed = prevent_default;
1169   if (input_event->type != WebInputEvent::Char || !suppress_next_char_events_) {
1170     suppress_next_char_events_ = false;
1171     if (!processed && webwidget_)
1172       processed = webwidget_->handleInputEvent(*input_event);
1173   }
1174
1175   // If this RawKeyDown event corresponds to a browser keyboard shortcut and
1176   // it's not processed by webkit, then we need to suppress the upcoming Char
1177   // events.
1178   if (!processed && is_keyboard_shortcut)
1179     suppress_next_char_events_ = true;
1180
1181   InputEventAckState ack_result = processed ?
1182       INPUT_EVENT_ACK_STATE_CONSUMED : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1183   if (!processed &&  input_event->type == WebInputEvent::TouchStart) {
1184     const WebTouchEvent& touch_event =
1185         *static_cast<const WebTouchEvent*>(input_event);
1186     // Hit-test for all the pressed touch points. If there is a touch-handler
1187     // for any of the touch points, then the renderer should continue to receive
1188     // touch events.
1189     ack_result = INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1190     for (size_t i = 0; i < touch_event.touchesLength; ++i) {
1191       if (touch_event.touches[i].state == WebTouchPoint::StatePressed &&
1192           HasTouchEventHandlersAt(
1193               gfx::ToFlooredPoint(touch_event.touches[i].position))) {
1194         ack_result = INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1195         break;
1196       }
1197     }
1198   }
1199
1200   // Send mouse wheel events and their disposition to the compositor thread, so
1201   // that they can be used to produce the elastic overscroll effect on Mac.
1202   if (input_event->type == WebInputEvent::MouseWheel) {
1203     ObserveWheelEventAndResult(
1204         static_cast<const WebMouseWheelEvent&>(*input_event), processed);
1205   }
1206
1207   bool frame_pending = compositor_ && compositor_->BeginMainFrameRequested();
1208
1209   // If we don't have a fast and accurate Now(), we assume the input handlers
1210   // are heavy and rate limit them.
1211   bool rate_limiting_wanted =
1212       input_event->type == WebInputEvent::MouseMove ||
1213       input_event->type == WebInputEvent::MouseWheel;
1214   if (rate_limiting_wanted && !start_time.is_null()) {
1215       base::TimeTicks end_time = base::TimeTicks::Now();
1216       total_input_handling_time_this_frame_ += (end_time - start_time);
1217       rate_limiting_wanted =
1218           total_input_handling_time_this_frame_.InMicroseconds() >
1219           kInputHandlingTimeThrottlingThresholdMicroseconds;
1220   }
1221
1222   TRACE_EVENT_SYNTHETIC_DELAY_END("blink.HandleInputEvent");
1223
1224   // Note that we can't use handling_event_type_ here since it will be overriden
1225   // by reentrant calls for events after the paused one.
1226   bool no_ack = ignore_ack_for_mouse_move_from_debugger_ &&
1227       input_event->type == WebInputEvent::MouseMove;
1228   if (!WebInputEventTraits::IgnoresAckDisposition(*input_event) && !no_ack) {
1229     InputHostMsg_HandleInputEvent_ACK_Params ack;
1230     ack.type = input_event->type;
1231     ack.state = ack_result;
1232     ack.latency = swap_latency_info;
1233     scoped_ptr<IPC::Message> response(
1234         new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
1235     if (rate_limiting_wanted && frame_pending && !is_hidden_) {
1236       // We want to rate limit the input events in this case, so we'll wait for
1237       // painting to finish before ACKing this message.
1238       TRACE_EVENT_INSTANT0("renderer",
1239         "RenderWidget::OnHandleInputEvent ack throttled",
1240         TRACE_EVENT_SCOPE_THREAD);
1241       if (pending_input_event_ack_) {
1242         TRACE_EVENT_ASYNC_END0("input", "RenderWidget::ThrottledInputEventAck",
1243                                pending_input_event_ack_.get());
1244         // As two different kinds of events could cause us to postpone an ack
1245         // we send it now, if we have one pending. The Browser should never
1246         // send us the same kind of event we are delaying the ack for.
1247         Send(pending_input_event_ack_.release());
1248       }
1249       pending_input_event_ack_ = response.Pass();
1250       TRACE_EVENT_ASYNC_BEGIN0("input", "RenderWidget::ThrottledInputEventAck",
1251                                pending_input_event_ack_.get());
1252       if (compositor_)
1253         compositor_->NotifyInputThrottledUntilCommit();
1254     } else {
1255       Send(response.release());
1256     }
1257   }
1258   if (input_event->type == WebInputEvent::MouseMove)
1259     ignore_ack_for_mouse_move_from_debugger_ = false;
1260
1261 #if defined(OS_ANDROID)
1262   // Allow the IME to be shown when the focus changes as a consequence
1263   // of a processed touch end event.
1264   if (input_event->type == WebInputEvent::TouchEnd && processed)
1265     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
1266 #elif defined(USE_AURA)
1267   // Show the virtual keyboard if enabled and a user gesture triggers a focus
1268   // change.
1269   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
1270                     input_event->type == WebInputEvent::MouseUp)) {
1271     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_IME);
1272   }
1273 #endif
1274
1275   if (!prevent_default) {
1276     if (WebInputEvent::isKeyboardEventType(input_event->type))
1277       DidHandleKeyEvent();
1278     if (WebInputEvent::isMouseEventType(input_event->type))
1279       DidHandleMouseEvent(*(static_cast<const WebMouseEvent*>(input_event)));
1280     if (WebInputEvent::isTouchEventType(input_event->type))
1281       DidHandleTouchEvent(*(static_cast<const WebTouchEvent*>(input_event)));
1282   }
1283
1284 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
1285 // virtual keyboard.
1286 #if !defined(OS_ANDROID)
1287   // Virtual keyboard is not supported, so react to focus change immediately.
1288   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
1289                     input_event->type == WebInputEvent::MouseUp)) {
1290     FocusChangeComplete();
1291   }
1292 #endif
1293 }
1294
1295 void RenderWidget::OnCursorVisibilityChange(bool is_visible) {
1296   if (webwidget_)
1297     webwidget_->setCursorVisibilityState(is_visible);
1298 }
1299
1300 void RenderWidget::OnMouseCaptureLost() {
1301   if (webwidget_)
1302     webwidget_->mouseCaptureLost();
1303 }
1304
1305 void RenderWidget::OnSetFocus(bool enable) {
1306   has_focus_ = enable;
1307   if (webwidget_)
1308     webwidget_->setFocus(enable);
1309 }
1310
1311 void RenderWidget::ClearFocus() {
1312   // We may have got the focus from the browser before this gets processed, in
1313   // which case we do not want to unfocus ourself.
1314   if (!has_focus_ && webwidget_)
1315     webwidget_->setFocus(false);
1316 }
1317
1318 void RenderWidget::FlushPendingInputEventAck() {
1319   if (pending_input_event_ack_) {
1320     TRACE_EVENT_ASYNC_END0("input", "RenderWidget::ThrottledInputEventAck",
1321                            pending_input_event_ack_.get());
1322     Send(pending_input_event_ack_.release());
1323   }
1324   total_input_handling_time_this_frame_ = base::TimeDelta();
1325 }
1326
1327 ///////////////////////////////////////////////////////////////////////////////
1328 // WebWidgetClient
1329
1330 void RenderWidget::didAutoResize(const WebSize& new_size) {
1331   if (size_.width() != new_size.width || size_.height() != new_size.height) {
1332     size_ = new_size;
1333
1334     if (resizing_mode_selector_->is_synchronous_mode()) {
1335       WebRect new_pos(rootWindowRect().x,
1336                       rootWindowRect().y,
1337                       new_size.width,
1338                       new_size.height);
1339       view_screen_rect_ = new_pos;
1340       window_screen_rect_ = new_pos;
1341     }
1342
1343     AutoResizeCompositor();
1344
1345     if (!resizing_mode_selector_->is_synchronous_mode())
1346       need_update_rect_for_auto_resize_ = true;
1347   }
1348 }
1349
1350 void RenderWidget::AutoResizeCompositor()  {
1351   physical_backing_size_ = gfx::ToCeiledSize(gfx::ScaleSize(size_,
1352       device_scale_factor_));
1353   if (compositor_)
1354     compositor_->setViewportSize(size_, physical_backing_size_);
1355 }
1356
1357 void RenderWidget::initializeLayerTreeView() {
1358   DCHECK(!host_closing_);
1359
1360   compositor_ = RenderWidgetCompositor::Create(this, compositor_deps_);
1361   compositor_->setViewportSize(size_, physical_backing_size_);
1362   if (init_complete_)
1363     StartCompositor();
1364 }
1365
1366 void RenderWidget::WillCloseLayerTreeView() {
1367   if (host_closing_)
1368     return;
1369
1370   // Prevent new compositors or output surfaces from being created.
1371   host_closing_ = true;
1372
1373   // Always send this notification to prevent new layer tree views from
1374   // being created, even if one hasn't been created yet.
1375   if (webwidget_)
1376     webwidget_->willCloseLayerTreeView();
1377 }
1378
1379 blink::WebLayerTreeView* RenderWidget::layerTreeView() {
1380   return compositor_.get();
1381 }
1382
1383 void RenderWidget::willBeginCompositorFrame() {
1384   TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
1385
1386   // The following two can result in further layout and possibly
1387   // enable GPU acceleration so they need to be called before any painting
1388   // is done.
1389   UpdateTextInputType();
1390 #if defined(OS_ANDROID)
1391   UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
1392 #endif
1393   UpdateSelectionBounds();
1394 }
1395
1396 void RenderWidget::didBecomeReadyForAdditionalInput() {
1397   TRACE_EVENT0("renderer", "RenderWidget::didBecomeReadyForAdditionalInput");
1398   FlushPendingInputEventAck();
1399 }
1400
1401 void RenderWidget::DidCommitCompositorFrame() {
1402   FOR_EACH_OBSERVER(RenderFrameProxy, render_frame_proxies_,
1403                     DidCommitCompositorFrame());
1404 #if defined(VIDEO_HOLE)
1405   FOR_EACH_OBSERVER(RenderFrameImpl, video_hole_frames_,
1406                     DidCommitCompositorFrame());
1407 #endif  // defined(VIDEO_HOLE)
1408 }
1409
1410 // static
1411 scoped_ptr<cc::SwapPromise> RenderWidget::QueueMessageImpl(
1412     IPC::Message* msg,
1413     MessageDeliveryPolicy policy,
1414     FrameSwapMessageQueue* frame_swap_message_queue,
1415     scoped_refptr<IPC::SyncMessageFilter> sync_message_filter,
1416     bool commit_requested,
1417     int source_frame_number) {
1418   if (policy == MESSAGE_DELIVERY_POLICY_WITH_VISUAL_STATE &&
1419       // No need for lock: this gets changed only on this thread.
1420       !commit_requested &&
1421       // No need for lock: Messages are only enqueued from this thread, if we
1422       // don't have any now, no other thread will add any.
1423       frame_swap_message_queue->Empty()) {
1424     sync_message_filter->Send(msg);
1425     return nullptr;
1426   }
1427
1428   bool first_message_for_frame = false;
1429   frame_swap_message_queue->QueueMessageForFrame(policy,
1430                                                  source_frame_number,
1431                                                  make_scoped_ptr(msg),
1432                                                  &first_message_for_frame);
1433   if (first_message_for_frame) {
1434     scoped_ptr<cc::SwapPromise> promise(new QueueMessageSwapPromise(
1435         sync_message_filter, frame_swap_message_queue, source_frame_number));
1436     return promise;
1437   }
1438   return nullptr;
1439 }
1440
1441 void RenderWidget::QueueMessage(IPC::Message* msg,
1442                                 MessageDeliveryPolicy policy) {
1443   // RenderThreadImpl::current() is NULL in some tests.
1444   if (!compositor_ || !RenderThreadImpl::current()) {
1445     Send(msg);
1446     return;
1447   }
1448
1449   scoped_ptr<cc::SwapPromise> swap_promise =
1450       QueueMessageImpl(msg,
1451                        policy,
1452                        frame_swap_message_queue_.get(),
1453                        RenderThreadImpl::current()->sync_message_filter(),
1454                        compositor_->BeginMainFrameRequested(),
1455                        compositor_->GetSourceFrameNumber());
1456
1457   if (swap_promise) {
1458     compositor_->QueueSwapPromise(swap_promise.Pass());
1459     compositor_->SetNeedsCommit();
1460   }
1461 }
1462
1463 void RenderWidget::didCommitAndDrawCompositorFrame() {
1464   // NOTE: Tests may break if this event is renamed or moved. See
1465   // tab_capture_performancetest.cc.
1466   TRACE_EVENT0("gpu", "RenderWidget::didCommitAndDrawCompositorFrame");
1467   // Notify subclasses that we initiated the paint operation.
1468   DidInitiatePaint();
1469 }
1470
1471 void RenderWidget::didCompleteSwapBuffers() {
1472   TRACE_EVENT0("renderer", "RenderWidget::didCompleteSwapBuffers");
1473
1474   // Notify subclasses threaded composited rendering was flushed to the screen.
1475   DidFlushPaint();
1476
1477   if (!next_paint_flags_ &&
1478       !need_update_rect_for_auto_resize_ &&
1479       !plugin_window_moves_.size()) {
1480     return;
1481   }
1482
1483   ViewHostMsg_UpdateRect_Params params;
1484   params.view_size = size_;
1485   params.plugin_window_moves.swap(plugin_window_moves_);
1486   params.flags = next_paint_flags_;
1487
1488   Send(new ViewHostMsg_UpdateRect(routing_id_, params));
1489   next_paint_flags_ = 0;
1490   need_update_rect_for_auto_resize_ = false;
1491 }
1492
1493 void RenderWidget::scheduleComposite() {
1494   if (compositor_ &&
1495       compositor_deps_->GetCompositorImplThreadTaskRunner().get()) {
1496     compositor_->setNeedsAnimate();
1497   }
1498 }
1499
1500 void RenderWidget::didChangeCursor(const WebCursorInfo& cursor_info) {
1501   // TODO(darin): Eliminate this temporary.
1502   WebCursor cursor;
1503   InitializeCursorFromWebKitCursorInfo(&cursor, cursor_info);
1504   // Only send a SetCursor message if we need to make a change.
1505   if (!current_cursor_.IsEqual(cursor)) {
1506     current_cursor_ = cursor;
1507     Send(new ViewHostMsg_SetCursor(routing_id_, cursor));
1508   }
1509 }
1510
1511 // We are supposed to get a single call to Show for a newly created RenderWidget
1512 // that was created via RenderWidget::CreateWebView.  So, we wait until this
1513 // point to dispatch the ShowWidget message.
1514 //
1515 // This method provides us with the information about how to display the newly
1516 // created RenderWidget (i.e., as a blocked popup or as a new tab).
1517 //
1518 void RenderWidget::show(WebNavigationPolicy) {
1519   DCHECK(!did_show_) << "received extraneous Show call";
1520   DCHECK(routing_id_ != MSG_ROUTING_NONE);
1521   DCHECK(opener_id_ != MSG_ROUTING_NONE);
1522
1523   if (did_show_)
1524     return;
1525
1526   did_show_ = true;
1527   // NOTE: initial_rect_ may still have its default values at this point, but
1528   // that's okay.  It'll be ignored if as_popup is false, or the browser
1529   // process will impose a default position otherwise.
1530   Send(new ViewHostMsg_ShowWidget(opener_id_, routing_id_, initial_rect_));
1531   SetPendingWindowRect(initial_rect_);
1532 }
1533
1534 void RenderWidget::didFocus() {
1535 }
1536
1537 void RenderWidget::didBlur() {
1538 }
1539
1540 void RenderWidget::DoDeferredClose() {
1541   WillCloseLayerTreeView();
1542   Send(new ViewHostMsg_Close(routing_id_));
1543 }
1544
1545 void RenderWidget::closeWidgetSoon() {
1546   if (is_swapped_out_) {
1547     // This widget is currently swapped out, and the active widget is in a
1548     // different process.  Have the browser route the close request to the
1549     // active widget instead, so that the correct unload handlers are run.
1550     Send(new ViewHostMsg_RouteCloseEvent(routing_id_));
1551     return;
1552   }
1553
1554   // If a page calls window.close() twice, we'll end up here twice, but that's
1555   // OK.  It is safe to send multiple Close messages.
1556
1557   // Ask the RenderWidgetHost to initiate close.  We could be called from deep
1558   // in Javascript.  If we ask the RendwerWidgetHost to close now, the window
1559   // could be closed before the JS finishes executing.  So instead, post a
1560   // message back to the message loop, which won't run until the JS is
1561   // complete, and then the Close message can be sent.
1562   RenderThread::Get()->GetTaskRunner()->PostTask(
1563       FROM_HERE, base::Bind(&RenderWidget::DoDeferredClose, this));
1564 }
1565
1566 void RenderWidget::QueueSyntheticGesture(
1567     scoped_ptr<SyntheticGestureParams> gesture_params,
1568     const SyntheticGestureCompletionCallback& callback) {
1569   DCHECK(!callback.is_null());
1570
1571   pending_synthetic_gesture_callbacks_.push(callback);
1572
1573   SyntheticGesturePacket gesture_packet;
1574   gesture_packet.set_gesture_params(gesture_params.Pass());
1575
1576   Send(new InputHostMsg_QueueSyntheticGesture(routing_id_, gesture_packet));
1577 }
1578
1579 void RenderWidget::Close() {
1580   screen_metrics_emulator_.reset();
1581   WillCloseLayerTreeView();
1582   compositor_.reset();
1583   if (webwidget_) {
1584     webwidget_->close();
1585     webwidget_ = NULL;
1586   }
1587 }
1588
1589 WebRect RenderWidget::windowRect() {
1590   if (pending_window_rect_count_)
1591     return pending_window_rect_;
1592
1593   return view_screen_rect_;
1594 }
1595
1596 void RenderWidget::setToolTipText(const blink::WebString& text,
1597                                   WebTextDirection hint) {
1598   Send(new ViewHostMsg_SetTooltipText(routing_id_, text, hint));
1599 }
1600
1601 void RenderWidget::setWindowRect(const WebRect& rect) {
1602   WebRect window_rect = rect;
1603   if (popup_origin_scale_for_emulation_) {
1604     float scale = popup_origin_scale_for_emulation_;
1605     window_rect.x = popup_screen_origin_for_emulation_.x() +
1606         (window_rect.x - popup_view_origin_for_emulation_.x()) * scale;
1607     window_rect.y = popup_screen_origin_for_emulation_.y() +
1608         (window_rect.y - popup_view_origin_for_emulation_.y()) * scale;
1609   }
1610
1611   if (!resizing_mode_selector_->is_synchronous_mode()) {
1612     if (did_show_) {
1613       Send(new ViewHostMsg_RequestMove(routing_id_, window_rect));
1614       SetPendingWindowRect(window_rect);
1615     } else {
1616       initial_rect_ = window_rect;
1617     }
1618   } else {
1619     SetWindowRectSynchronously(window_rect);
1620   }
1621 }
1622
1623 void RenderWidget::SetPendingWindowRect(const WebRect& rect) {
1624   pending_window_rect_ = rect;
1625   pending_window_rect_count_++;
1626 }
1627
1628 WebRect RenderWidget::rootWindowRect() {
1629   if (pending_window_rect_count_) {
1630     // NOTE(mbelshe): If there is a pending_window_rect_, then getting
1631     // the RootWindowRect is probably going to return wrong results since the
1632     // browser may not have processed the Move yet.  There isn't really anything
1633     // good to do in this case, and it shouldn't happen - since this size is
1634     // only really needed for windowToScreen, which is only used for Popups.
1635     return pending_window_rect_;
1636   }
1637
1638   return window_screen_rect_;
1639 }
1640
1641 WebRect RenderWidget::windowResizerRect() {
1642   return resizer_rect_;
1643 }
1644
1645 void RenderWidget::OnSetInputMethodActive(bool is_active) {
1646   // To prevent this renderer process from sending unnecessary IPC messages to
1647   // a browser process, we permit the renderer process to send IPC messages
1648   // only during the input method attached to the browser process is active.
1649   input_method_is_active_ = is_active;
1650 }
1651
1652 void RenderWidget::OnCandidateWindowShown() {
1653   webwidget_->didShowCandidateWindow();
1654 }
1655
1656 void RenderWidget::OnCandidateWindowUpdated() {
1657   webwidget_->didUpdateCandidateWindow();
1658 }
1659
1660 void RenderWidget::OnCandidateWindowHidden() {
1661   webwidget_->didHideCandidateWindow();
1662 }
1663
1664 void RenderWidget::OnImeSetComposition(
1665     const base::string16& text,
1666     const std::vector<WebCompositionUnderline>& underlines,
1667     int selection_start, int selection_end) {
1668   if (!ShouldHandleImeEvent())
1669     return;
1670   ImeEventGuard guard(this);
1671   if (!webwidget_->setComposition(
1672       text, WebVector<WebCompositionUnderline>(underlines),
1673       selection_start, selection_end)) {
1674     // If we failed to set the composition text, then we need to let the browser
1675     // process to cancel the input method's ongoing composition session, to make
1676     // sure we are in a consistent state.
1677     Send(new InputHostMsg_ImeCancelComposition(routing_id()));
1678   }
1679   UpdateCompositionInfo(true);
1680 }
1681
1682 void RenderWidget::OnImeConfirmComposition(const base::string16& text,
1683                                            const gfx::Range& replacement_range,
1684                                            bool keep_selection) {
1685   if (!ShouldHandleImeEvent())
1686     return;
1687   ImeEventGuard guard(this);
1688   handling_input_event_ = true;
1689   if (text.length())
1690     webwidget_->confirmComposition(text);
1691   else if (keep_selection)
1692     webwidget_->confirmComposition(WebWidget::KeepSelection);
1693   else
1694     webwidget_->confirmComposition(WebWidget::DoNotKeepSelection);
1695   handling_input_event_ = false;
1696   UpdateCompositionInfo(true);
1697 }
1698
1699 void RenderWidget::OnRepaint(gfx::Size size_to_paint) {
1700   // During shutdown we can just ignore this message.
1701   if (!webwidget_)
1702     return;
1703
1704   // Even if the browser provides an empty damage rect, it's still expecting to
1705   // receive a repaint ack so just damage the entire widget bounds.
1706   if (size_to_paint.IsEmpty()) {
1707     size_to_paint = size_;
1708   }
1709
1710   set_next_paint_is_repaint_ack();
1711   if (compositor_)
1712     compositor_->SetNeedsRedrawRect(gfx::Rect(size_to_paint));
1713 }
1714
1715 void RenderWidget::OnSyntheticGestureCompleted() {
1716   DCHECK(!pending_synthetic_gesture_callbacks_.empty());
1717
1718   pending_synthetic_gesture_callbacks_.front().Run();
1719   pending_synthetic_gesture_callbacks_.pop();
1720 }
1721
1722 void RenderWidget::OnSetTextDirection(WebTextDirection direction) {
1723   if (!webwidget_)
1724     return;
1725   webwidget_->setTextDirection(direction);
1726 }
1727
1728 void RenderWidget::OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
1729                                        const gfx::Rect& window_screen_rect) {
1730   if (screen_metrics_emulator_) {
1731     screen_metrics_emulator_->OnUpdateScreenRectsMessage(
1732         view_screen_rect, window_screen_rect);
1733   } else {
1734     view_screen_rect_ = view_screen_rect;
1735     window_screen_rect_ = window_screen_rect;
1736   }
1737   Send(new ViewHostMsg_UpdateScreenRects_ACK(routing_id()));
1738 }
1739
1740 void RenderWidget::showImeIfNeeded() {
1741   OnShowImeIfNeeded();
1742 }
1743
1744 void RenderWidget::OnShowImeIfNeeded() {
1745 #if defined(OS_ANDROID) || defined(USE_AURA)
1746   UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
1747 #endif
1748
1749 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
1750 // virtual keyboard.
1751 #if !defined(OS_ANDROID)
1752   FocusChangeComplete();
1753 #endif
1754 }
1755
1756 #if defined(OS_ANDROID)
1757 void RenderWidget::IncrementOutstandingImeEventAcks() {
1758   ++outstanding_ime_acks_;
1759 }
1760
1761 void RenderWidget::OnImeEventAck() {
1762   --outstanding_ime_acks_;
1763   DCHECK(outstanding_ime_acks_ >= 0);
1764 }
1765 #endif
1766
1767 bool RenderWidget::ShouldHandleImeEvent() {
1768 #if defined(OS_ANDROID)
1769   return !!webwidget_ && outstanding_ime_acks_ == 0;
1770 #else
1771   return !!webwidget_;
1772 #endif
1773 }
1774
1775 bool RenderWidget::SendAckForMouseMoveFromDebugger() {
1776   if (handling_event_type_ == WebInputEvent::MouseMove) {
1777     // If we pause multiple times during a single mouse move event, we should
1778     // only send ACK once.
1779     if (!ignore_ack_for_mouse_move_from_debugger_) {
1780       InputHostMsg_HandleInputEvent_ACK_Params ack;
1781       ack.type = handling_event_type_;
1782       ack.state = INPUT_EVENT_ACK_STATE_CONSUMED;
1783       Send(new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
1784     }
1785     return true;
1786   }
1787   return false;
1788 }
1789
1790 void RenderWidget::IgnoreAckForMouseMoveFromDebugger() {
1791   ignore_ack_for_mouse_move_from_debugger_ = true;
1792 }
1793
1794 void RenderWidget::SetDeviceScaleFactor(float device_scale_factor) {
1795   if (device_scale_factor_ == device_scale_factor)
1796     return;
1797
1798   device_scale_factor_ = device_scale_factor;
1799   scheduleComposite();
1800 }
1801
1802 bool RenderWidget::SetDeviceColorProfile(
1803     const std::vector<char>& color_profile) {
1804   if (device_color_profile_ == color_profile)
1805     return false;
1806
1807   device_color_profile_ = color_profile;
1808   return true;
1809 }
1810
1811 void RenderWidget::ResetDeviceColorProfileForTesting() {
1812   if (!device_color_profile_.empty())
1813     device_color_profile_.clear();
1814   device_color_profile_.push_back('0');
1815 }
1816
1817 void RenderWidget::OnOrientationChange() {
1818 }
1819
1820 gfx::Vector2d RenderWidget::GetScrollOffset() {
1821   // Bare RenderWidgets don't support scroll offset.
1822   return gfx::Vector2d();
1823 }
1824
1825 void RenderWidget::SetHidden(bool hidden) {
1826   if (is_hidden_ == hidden)
1827     return;
1828
1829   // The status has changed.  Tell the RenderThread about it and ensure
1830   // throttled acks are released in case frame production ceases.
1831   is_hidden_ = hidden;
1832   FlushPendingInputEventAck();
1833
1834   if (is_hidden_)
1835     RenderThreadImpl::current()->WidgetHidden();
1836   else
1837     RenderThreadImpl::current()->WidgetRestored();
1838 }
1839
1840 void RenderWidget::WillToggleFullscreen() {
1841   if (!webwidget_)
1842     return;
1843
1844   if (is_fullscreen_) {
1845     webwidget_->willExitFullScreen();
1846   } else {
1847     webwidget_->willEnterFullScreen();
1848   }
1849 }
1850
1851 void RenderWidget::DidToggleFullscreen() {
1852   if (!webwidget_)
1853     return;
1854
1855   if (is_fullscreen_) {
1856     webwidget_->didEnterFullScreen();
1857   } else {
1858     webwidget_->didExitFullScreen();
1859   }
1860 }
1861
1862 bool RenderWidget::next_paint_is_resize_ack() const {
1863   return ViewHostMsg_UpdateRect_Flags::is_resize_ack(next_paint_flags_);
1864 }
1865
1866 void RenderWidget::set_next_paint_is_resize_ack() {
1867   next_paint_flags_ |= ViewHostMsg_UpdateRect_Flags::IS_RESIZE_ACK;
1868 }
1869
1870 void RenderWidget::set_next_paint_is_repaint_ack() {
1871   next_paint_flags_ |= ViewHostMsg_UpdateRect_Flags::IS_REPAINT_ACK;
1872 }
1873
1874 static bool IsDateTimeInput(ui::TextInputType type) {
1875   return type == ui::TEXT_INPUT_TYPE_DATE ||
1876       type == ui::TEXT_INPUT_TYPE_DATE_TIME ||
1877       type == ui::TEXT_INPUT_TYPE_DATE_TIME_LOCAL ||
1878       type == ui::TEXT_INPUT_TYPE_MONTH ||
1879       type == ui::TEXT_INPUT_TYPE_TIME ||
1880       type == ui::TEXT_INPUT_TYPE_WEEK;
1881 }
1882
1883
1884 void RenderWidget::StartHandlingImeEvent() {
1885   DCHECK(!handling_ime_event_);
1886   handling_ime_event_ = true;
1887 }
1888
1889 void RenderWidget::FinishHandlingImeEvent() {
1890   DCHECK(handling_ime_event_);
1891   handling_ime_event_ = false;
1892   // While handling an ime event, text input state and selection bounds updates
1893   // are ignored. These must explicitly be updated once finished handling the
1894   // ime event.
1895   UpdateSelectionBounds();
1896 #if defined(OS_ANDROID)
1897   UpdateTextInputState(NO_SHOW_IME, FROM_IME);
1898 #endif
1899 }
1900
1901 void RenderWidget::UpdateTextInputType() {
1902   // On Windows, not only an IME but also an on-screen keyboard relies on the
1903   // latest TextInputType to optimize its layout and functionality. Thus
1904   // |input_method_is_active_| is no longer an appropriate condition to suppress
1905   // TextInputTypeChanged IPC on Windows.
1906   // TODO(yukawa, yoichio): Consider to stop checking |input_method_is_active_|
1907   // on other platforms as well as Windows if the overhead is acceptable.
1908 #if !defined(OS_WIN)
1909   if (!input_method_is_active_)
1910     return;
1911 #endif
1912
1913   ui::TextInputType new_type = GetTextInputType();
1914   if (IsDateTimeInput(new_type))
1915     return;  // Not considered as a text input field in WebKit/Chromium.
1916
1917   bool new_can_compose_inline = CanComposeInline();
1918
1919   blink::WebTextInputInfo new_info;
1920   if (webwidget_)
1921     new_info = webwidget_->textInputInfo();
1922   const ui::TextInputMode new_mode = ConvertInputMode(new_info.inputMode);
1923   int new_flags = new_info.flags;
1924
1925   if (text_input_type_ != new_type
1926       || can_compose_inline_ != new_can_compose_inline
1927       || text_input_mode_ != new_mode
1928       || text_input_flags_ != new_flags) {
1929     Send(new ViewHostMsg_TextInputTypeChanged(routing_id(),
1930                                               new_type,
1931                                               new_mode,
1932                                               new_can_compose_inline,
1933                                               new_flags));
1934     text_input_type_ = new_type;
1935     can_compose_inline_ = new_can_compose_inline;
1936     text_input_mode_ = new_mode;
1937     text_input_flags_ = new_flags;
1938   }
1939 }
1940
1941 #if defined(OS_ANDROID) || defined(USE_AURA)
1942 void RenderWidget::UpdateTextInputState(ShowIme show_ime,
1943                                         ChangeSource change_source) {
1944   if (handling_ime_event_)
1945     return;
1946   if (show_ime == NO_SHOW_IME && !input_method_is_active_)
1947     return;
1948   ui::TextInputType new_type = GetTextInputType();
1949   if (IsDateTimeInput(new_type))
1950     return;  // Not considered as a text input field in WebKit/Chromium.
1951
1952   blink::WebTextInputInfo new_info;
1953   if (webwidget_)
1954     new_info = webwidget_->textInputInfo();
1955
1956   bool new_can_compose_inline = CanComposeInline();
1957
1958   // Only sends text input params if they are changed or if the ime should be
1959   // shown.
1960   if (show_ime == SHOW_IME_IF_NEEDED ||
1961       (text_input_type_ != new_type ||
1962        text_input_info_ != new_info ||
1963        can_compose_inline_ != new_can_compose_inline)
1964 #if defined(OS_ANDROID)
1965       || text_field_is_dirty_
1966 #endif
1967       ) {
1968     ViewHostMsg_TextInputState_Params p;
1969     p.type = new_type;
1970     p.flags = new_info.flags;
1971     p.value = new_info.value.utf8();
1972     p.selection_start = new_info.selectionStart;
1973     p.selection_end = new_info.selectionEnd;
1974     p.composition_start = new_info.compositionStart;
1975     p.composition_end = new_info.compositionEnd;
1976     p.can_compose_inline = new_can_compose_inline;
1977     p.show_ime_if_needed = (show_ime == SHOW_IME_IF_NEEDED);
1978 #if defined(USE_AURA)
1979     p.is_non_ime_change = true;
1980 #endif
1981 #if defined(OS_ANDROID)
1982     p.is_non_ime_change = (change_source == FROM_NON_IME) ||
1983                          text_field_is_dirty_;
1984     if (p.is_non_ime_change)
1985       IncrementOutstandingImeEventAcks();
1986     text_field_is_dirty_ = false;
1987 #endif
1988 #if defined(USE_AURA)
1989     Send(new ViewHostMsg_TextInputTypeChanged(routing_id(),
1990                                               new_type,
1991                                               text_input_mode_,
1992                                               new_can_compose_inline,
1993                                               new_info.flags));
1994 #endif
1995     Send(new ViewHostMsg_TextInputStateChanged(routing_id(), p));
1996
1997     text_input_info_ = new_info;
1998     text_input_type_ = new_type;
1999     can_compose_inline_ = new_can_compose_inline;
2000     text_input_flags_ = new_info.flags;
2001   }
2002 }
2003 #endif
2004
2005 void RenderWidget::GetSelectionBounds(gfx::Rect* focus, gfx::Rect* anchor) {
2006   WebRect focus_webrect;
2007   WebRect anchor_webrect;
2008   webwidget_->selectionBounds(focus_webrect, anchor_webrect);
2009   *focus = focus_webrect;
2010   *anchor = anchor_webrect;
2011 }
2012
2013 void RenderWidget::UpdateSelectionBounds() {
2014   if (!webwidget_)
2015     return;
2016   if (handling_ime_event_)
2017     return;
2018
2019   // With composited selection updates, the selection bounds will be reported
2020   // directly by the compositor, in which case explicit IPC selection
2021   // notifications should be suppressed.
2022   if (!blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled()) {
2023     ViewHostMsg_SelectionBounds_Params params;
2024     GetSelectionBounds(&params.anchor_rect, &params.focus_rect);
2025     if (selection_anchor_rect_ != params.anchor_rect ||
2026         selection_focus_rect_ != params.focus_rect) {
2027       selection_anchor_rect_ = params.anchor_rect;
2028       selection_focus_rect_ = params.focus_rect;
2029       webwidget_->selectionTextDirection(params.focus_dir, params.anchor_dir);
2030       params.is_anchor_first = webwidget_->isSelectionAnchorFirst();
2031       Send(new ViewHostMsg_SelectionBoundsChanged(routing_id_, params));
2032     }
2033   }
2034
2035   UpdateCompositionInfo(false);
2036 }
2037
2038 // Check blink::WebTextInputType and ui::TextInputType is kept in sync.
2039 #define STATIC_ASSERT_WTIT_ENUM_MATCH(a, b)            \
2040     static_assert(int(blink::WebTextInputType##a)      \
2041                       == int(ui::TEXT_INPUT_TYPE_##b), \
2042                   "mismatching enums: " #a)
2043
2044 STATIC_ASSERT_WTIT_ENUM_MATCH(None,            NONE);
2045 STATIC_ASSERT_WTIT_ENUM_MATCH(Text,            TEXT);
2046 STATIC_ASSERT_WTIT_ENUM_MATCH(Password,        PASSWORD);
2047 STATIC_ASSERT_WTIT_ENUM_MATCH(Search,          SEARCH);
2048 STATIC_ASSERT_WTIT_ENUM_MATCH(Email,           EMAIL);
2049 STATIC_ASSERT_WTIT_ENUM_MATCH(Number,          NUMBER);
2050 STATIC_ASSERT_WTIT_ENUM_MATCH(Telephone,       TELEPHONE);
2051 STATIC_ASSERT_WTIT_ENUM_MATCH(URL,             URL);
2052 STATIC_ASSERT_WTIT_ENUM_MATCH(Date,            DATE);
2053 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTime,        DATE_TIME);
2054 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTimeLocal,   DATE_TIME_LOCAL);
2055 STATIC_ASSERT_WTIT_ENUM_MATCH(Month,           MONTH);
2056 STATIC_ASSERT_WTIT_ENUM_MATCH(Time,            TIME);
2057 STATIC_ASSERT_WTIT_ENUM_MATCH(Week,            WEEK);
2058 STATIC_ASSERT_WTIT_ENUM_MATCH(TextArea,        TEXT_AREA);
2059 STATIC_ASSERT_WTIT_ENUM_MATCH(ContentEditable, CONTENT_EDITABLE);
2060 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTimeField,   DATE_TIME_FIELD);
2061
2062 ui::TextInputType RenderWidget::WebKitToUiTextInputType(
2063     blink::WebTextInputType type) {
2064   // Check the type is in the range representable by ui::TextInputType.
2065   DCHECK_LE(type, static_cast<int>(ui::TEXT_INPUT_TYPE_MAX)) <<
2066     "blink::WebTextInputType and ui::TextInputType not synchronized";
2067   return static_cast<ui::TextInputType>(type);
2068 }
2069
2070 ui::TextInputType RenderWidget::GetTextInputType() {
2071   if (webwidget_)
2072     return WebKitToUiTextInputType(webwidget_->textInputInfo().type);
2073   return ui::TEXT_INPUT_TYPE_NONE;
2074 }
2075
2076 void RenderWidget::UpdateCompositionInfo(bool should_update_range) {
2077 #if defined(OS_ANDROID)
2078   // TODO(yukawa): Start sending character bounds when the browser side
2079   // implementation becomes ready (crbug.com/424866).
2080 #else
2081   gfx::Range range = gfx::Range();
2082   if (should_update_range) {
2083     GetCompositionRange(&range);
2084   } else {
2085     range = composition_range_;
2086   }
2087   std::vector<gfx::Rect> character_bounds;
2088   GetCompositionCharacterBounds(&character_bounds);
2089
2090   if (!ShouldUpdateCompositionInfo(range, character_bounds))
2091     return;
2092   composition_character_bounds_ = character_bounds;
2093   composition_range_ = range;
2094   Send(new InputHostMsg_ImeCompositionRangeChanged(
2095       routing_id(), composition_range_, composition_character_bounds_));
2096 #endif
2097 }
2098
2099 void RenderWidget::GetCompositionCharacterBounds(
2100     std::vector<gfx::Rect>* bounds) {
2101   DCHECK(bounds);
2102   bounds->clear();
2103 }
2104
2105 void RenderWidget::GetCompositionRange(gfx::Range* range) {
2106   size_t location, length;
2107   if (webwidget_->compositionRange(&location, &length)) {
2108     range->set_start(location);
2109     range->set_end(location + length);
2110   } else if (webwidget_->caretOrSelectionRange(&location, &length)) {
2111     range->set_start(location);
2112     range->set_end(location + length);
2113   } else {
2114     *range = gfx::Range::InvalidRange();
2115   }
2116 }
2117
2118 bool RenderWidget::ShouldUpdateCompositionInfo(
2119     const gfx::Range& range,
2120     const std::vector<gfx::Rect>& bounds) {
2121   if (composition_range_ != range)
2122     return true;
2123   if (bounds.size() != composition_character_bounds_.size())
2124     return true;
2125   for (size_t i = 0; i < bounds.size(); ++i) {
2126     if (bounds[i] != composition_character_bounds_[i])
2127       return true;
2128   }
2129   return false;
2130 }
2131
2132 #if defined(OS_ANDROID)
2133 void RenderWidget::DidChangeBodyBackgroundColor(SkColor bg_color) {
2134   // If not initialized, default to white. Note that 0 is different from black
2135   // as black still has alpha 0xFF.
2136   if (!bg_color)
2137     bg_color = SK_ColorWHITE;
2138
2139   if (bg_color != body_background_color_) {
2140     body_background_color_ = bg_color;
2141     Send(new ViewHostMsg_DidChangeBodyBackgroundColor(routing_id(), bg_color));
2142   }
2143 }
2144
2145 bool RenderWidget::DoesRecordFullLayer() const {
2146   SynchronousCompositorFactory* synchronous_compositor_factory =
2147       SynchronousCompositorFactory::GetInstance();
2148
2149   // We assume that the absence of synchronous_compositor_factory
2150   // means we are in Chrome. In chrome, we want to clip, i.e.
2151   // *not* to record the full layer.
2152   if (!synchronous_compositor_factory)
2153     return false;
2154
2155   return synchronous_compositor_factory->RecordFullLayer();
2156 }
2157 #endif
2158
2159 bool RenderWidget::CanComposeInline() {
2160   return true;
2161 }
2162
2163 WebScreenInfo RenderWidget::screenInfo() {
2164   return screen_info_;
2165 }
2166
2167 float RenderWidget::deviceScaleFactor() {
2168   return device_scale_factor_;
2169 }
2170
2171 void RenderWidget::resetInputMethod() {
2172   if (!input_method_is_active_)
2173     return;
2174
2175   ImeEventGuard guard(this);
2176   // If the last text input type is not None, then we should finish any
2177   // ongoing composition regardless of the new text input type.
2178   if (text_input_type_ != ui::TEXT_INPUT_TYPE_NONE) {
2179     // If a composition text exists, then we need to let the browser process
2180     // to cancel the input method's ongoing composition session.
2181     if (webwidget_->confirmComposition())
2182       Send(new InputHostMsg_ImeCancelComposition(routing_id()));
2183   }
2184
2185   UpdateCompositionInfo(true);
2186 }
2187
2188 #if defined(OS_ANDROID)
2189 void RenderWidget::showUnhandledTapUIIfNeeded(
2190     const WebPoint& tapped_position,
2191     const WebNode& tapped_node,
2192     bool page_changed) {
2193   DCHECK(handling_input_event_);
2194   bool should_trigger = !page_changed && tapped_node.isTextNode() &&
2195                         !tapped_node.isContentEditable();
2196   if (should_trigger) {
2197     Send(new ViewHostMsg_ShowUnhandledTapUIIfNeeded(routing_id_,
2198         tapped_position.x, tapped_position.y));
2199   }
2200 }
2201 #endif
2202
2203 void RenderWidget::didHandleGestureEvent(
2204     const WebGestureEvent& event,
2205     bool event_cancelled) {
2206 #if defined(OS_ANDROID) || defined(USE_AURA)
2207   if (event_cancelled)
2208     return;
2209   if (event.type == WebInputEvent::GestureTap) {
2210     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
2211   } else if (event.type == WebInputEvent::GestureLongPress) {
2212     DCHECK(webwidget_);
2213     if (webwidget_->textInputInfo().value.isEmpty())
2214       UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
2215     else
2216       UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
2217   }
2218 #endif
2219 }
2220
2221 void RenderWidget::StartCompositor() {
2222   // For widgets that are never visible, we don't need the compositor to run
2223   // at all.
2224   if (never_visible_)
2225     return;
2226   // In tests without a RenderThreadImpl, don't set ready as this kicks
2227   // off creating output surfaces that the test can't create.
2228   if (!RenderThreadImpl::current())
2229     return;
2230   compositor_->StartCompositor();
2231 }
2232
2233 void RenderWidget::SchedulePluginMove(const WebPluginGeometry& move) {
2234   size_t i = 0;
2235   for (; i < plugin_window_moves_.size(); ++i) {
2236     if (plugin_window_moves_[i].window == move.window) {
2237       if (move.rects_valid) {
2238         plugin_window_moves_[i] = move;
2239       } else {
2240         plugin_window_moves_[i].visible = move.visible;
2241       }
2242       break;
2243     }
2244   }
2245
2246   if (i == plugin_window_moves_.size())
2247     plugin_window_moves_.push_back(move);
2248 }
2249
2250 void RenderWidget::CleanupWindowInPluginMoves(gfx::PluginWindowHandle window) {
2251   for (WebPluginGeometryVector::iterator i = plugin_window_moves_.begin();
2252        i != plugin_window_moves_.end(); ++i) {
2253     if (i->window == window) {
2254       plugin_window_moves_.erase(i);
2255       break;
2256     }
2257   }
2258 }
2259
2260
2261 RenderWidgetCompositor* RenderWidget::compositor() const {
2262   return compositor_.get();
2263 }
2264
2265 bool RenderWidget::WillHandleMouseEvent(const blink::WebMouseEvent& event) {
2266   return false;
2267 }
2268
2269 bool RenderWidget::WillHandleGestureEvent(
2270     const blink::WebGestureEvent& event) {
2271   return false;
2272 }
2273
2274 void RenderWidget::ObserveWheelEventAndResult(
2275     const blink::WebMouseWheelEvent& wheel_event,
2276     bool event_processed) {
2277   if (!compositor_deps_->IsElasticOverscrollEnabled())
2278     return;
2279
2280   // Blink does not accurately compute scroll bubbling or overscroll. For now,
2281   // assume that an unprocessed event was entirely an overscroll, and that a
2282   // processed event was entirely scroll.
2283   // TODO(ccameron): Retrieve an accurate scroll result from Blink.
2284   // http://crbug.com/442859
2285   cc::InputHandlerScrollResult scroll_result;
2286   if (event_processed) {
2287     scroll_result.did_scroll = true;
2288   } else {
2289     scroll_result.did_overscroll_root = true;
2290     scroll_result.unused_scroll_delta =
2291         gfx::Vector2dF(-wheel_event.deltaX, -wheel_event.deltaY);
2292   }
2293
2294   RenderThreadImpl* render_thread = RenderThreadImpl::current();
2295   InputHandlerManager* input_handler_manager =
2296       render_thread ? render_thread->input_handler_manager() : NULL;
2297   if (input_handler_manager) {
2298     input_handler_manager->ObserveWheelEventAndResultOnMainThread(
2299         routing_id_, wheel_event, scroll_result);
2300   }
2301 }
2302
2303 void RenderWidget::hasTouchEventHandlers(bool has_handlers) {
2304   Send(new ViewHostMsg_HasTouchEventHandlers(routing_id_, has_handlers));
2305 }
2306
2307 // Check blink::WebTouchAction and  blink::WebTouchActionAuto is kept in sync
2308 #define STATIC_ASSERT_WTI_ENUM_MATCH(a, b)                                         \
2309     static_assert(int(blink::WebTouchAction##a) == int(TOUCH_ACTION_##b), \
2310                   "mismatching enums: " #a)
2311
2312 void RenderWidget::setTouchAction(
2313     blink::WebTouchAction web_touch_action) {
2314
2315   // Ignore setTouchAction calls that result from synthetic touch events (eg.
2316   // when blink is emulating touch with mouse).
2317   if (handling_event_type_ != WebInputEvent::TouchStart)
2318     return;
2319
2320    // Verify the same values are used by the types so we can cast between them.
2321    STATIC_ASSERT_WTI_ENUM_MATCH(Auto,      AUTO);
2322    STATIC_ASSERT_WTI_ENUM_MATCH(None,      NONE);
2323    STATIC_ASSERT_WTI_ENUM_MATCH(PanX,      PAN_X);
2324    STATIC_ASSERT_WTI_ENUM_MATCH(PanY,      PAN_Y);
2325    STATIC_ASSERT_WTI_ENUM_MATCH(PinchZoom, PINCH_ZOOM);
2326
2327    content::TouchAction content_touch_action =
2328        static_cast<content::TouchAction>(web_touch_action);
2329   Send(new InputHostMsg_SetTouchAction(routing_id_, content_touch_action));
2330 }
2331
2332 void RenderWidget::didUpdateTextOfFocusedElementByNonUserInput() {
2333 #if defined(OS_ANDROID)
2334   text_field_is_dirty_ = true;
2335 #endif
2336 }
2337
2338 bool RenderWidget::HasTouchEventHandlersAt(const gfx::Point& point) const {
2339   return true;
2340 }
2341
2342 scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
2343 RenderWidget::CreateGraphicsContext3D() {
2344   if (!webwidget_)
2345     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2346   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
2347           switches::kDisableGpuCompositing))
2348     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2349   if (!RenderThreadImpl::current())
2350     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2351   CauseForGpuLaunch cause =
2352       CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE;
2353   scoped_refptr<GpuChannelHost> gpu_channel_host(
2354       RenderThreadImpl::current()->EstablishGpuChannelSync(cause));
2355   if (!gpu_channel_host.get())
2356     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2357
2358   // Explicitly disable antialiasing for the compositor. As of the time of
2359   // this writing, the only platform that supported antialiasing for the
2360   // compositor was Mac OS X, because the on-screen OpenGL context creation
2361   // code paths on Windows and Linux didn't yet have multisampling support.
2362   // Mac OS X essentially always behaves as though it's rendering offscreen.
2363   // Multisampling has a heavy cost especially on devices with relatively low
2364   // fill rate like most notebooks, and the Mac implementation would need to
2365   // be optimized to resolve directly into the IOSurface shared between the
2366   // GPU and browser processes. For these reasons and to avoid platform
2367   // disparities we explicitly disable antialiasing.
2368   blink::WebGraphicsContext3D::Attributes attributes;
2369   attributes.antialias = false;
2370   attributes.shareResources = true;
2371   attributes.noAutomaticFlushes = true;
2372   attributes.depth = false;
2373   attributes.stencil = false;
2374   bool lose_context_when_out_of_memory = true;
2375   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
2376 #if defined(OS_ANDROID)
2377   // If we raster too fast we become upload bound, and pending
2378   // uploads consume memory. For maximum upload throughput, we would
2379   // want to allow for upload_throughput * pipeline_time of pending
2380   // uploads, after which we are just wasting memory. Since we don't
2381   // know our upload throughput yet, this just caps our memory usage.
2382   size_t divider = 1;
2383   if (base::SysInfo::IsLowEndDevice())
2384     divider = 6;
2385   // For reference Nexus10 can upload 1MB in about 2.5ms.
2386   const double max_mb_uploaded_per_ms = 2.0 / (5 * divider);
2387   // Deadline to draw a frame to achieve 60 frames per second.
2388   const size_t kMillisecondsPerFrame = 16;
2389   // Assuming a two frame deep pipeline between the CPU and the GPU.
2390   size_t max_transfer_buffer_usage_mb =
2391       static_cast<size_t>(2 * kMillisecondsPerFrame * max_mb_uploaded_per_ms);
2392   static const size_t kBytesPerMegabyte = 1024 * 1024;
2393   // We keep the MappedMemoryReclaimLimit the same as the upload limit
2394   // to avoid unnecessarily stalling the compositor thread.
2395   limits.mapped_memory_reclaim_limit =
2396       max_transfer_buffer_usage_mb * kBytesPerMegabyte;
2397 #endif
2398
2399   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
2400       new WebGraphicsContext3DCommandBufferImpl(surface_id(),
2401                                                 GetURLForGraphicsContext3D(),
2402                                                 gpu_channel_host.get(),
2403                                                 attributes,
2404                                                 lose_context_when_out_of_memory,
2405                                                 limits,
2406                                                 NULL));
2407   return context.Pass();
2408 }
2409
2410 void RenderWidget::RegisterRenderFrameProxy(RenderFrameProxy* proxy) {
2411   render_frame_proxies_.AddObserver(proxy);
2412 }
2413
2414 void RenderWidget::UnregisterRenderFrameProxy(RenderFrameProxy* proxy) {
2415   render_frame_proxies_.RemoveObserver(proxy);
2416 }
2417
2418 void RenderWidget::RegisterRenderFrame(RenderFrameImpl* frame) {
2419   render_frames_.AddObserver(frame);
2420 }
2421
2422 void RenderWidget::UnregisterRenderFrame(RenderFrameImpl* frame) {
2423   render_frames_.RemoveObserver(frame);
2424 }
2425
2426 #if defined(VIDEO_HOLE)
2427 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
2428   video_hole_frames_.AddObserver(frame);
2429 }
2430
2431 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
2432   video_hole_frames_.RemoveObserver(frame);
2433 }
2434 #endif  // defined(VIDEO_HOLE)
2435
2436 }  // namespace content