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