content/renderer/render_widget.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/renderer/render_widget.h"
   6
   7 #include "base/auto_reset.h"
   8 #include "base/bind.h"
   9 #include "base/command_line.h"
  10 #include "base/logging.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/singleton.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/stl_util.h"
  16 #include "base/strings/utf_string_conversions.h"
  17 #include "base/sys_info.h"
  18 #include "base/trace_event/trace_event.h"
  19 #include "base/trace_event/trace_event_synthetic_delay.h"
  20 #include "build/build_config.h"
  21 #include "cc/base/switches.h"
  22 #include "cc/debug/benchmark_instrumentation.h"
  23 #include "cc/output/output_surface.h"
  24 #include "cc/trees/layer_tree_host.h"
  25 #include "components/scheduler/renderer/renderer_scheduler.h"
  26 #include "content/child/npapi/webplugin.h"
  27 #include "content/common/gpu/client/context_provider_command_buffer.h"
  28 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  29 #include "content/common/gpu/gpu_process_launch_causes.h"
  30 #include "content/common/input/synthetic_gesture_packet.h"
  31 #include "content/common/input/web_input_event_traits.h"
  32 #include "content/common/input_messages.h"
  33 #include "content/common/swapped_out_messages.h"
  34 #include "content/common/view_messages.h"
  35 #include "content/public/common/content_switches.h"
  36 #include "content/public/common/context_menu_params.h"
  37 #include "content/renderer/cursor_utils.h"
  38 #include "content/renderer/external_popup_menu.h"
  39 #include "content/renderer/gpu/compositor_output_surface.h"
  40 #include "content/renderer/gpu/delegated_compositor_output_surface.h"
  41 #include "content/renderer/gpu/frame_swap_message_queue.h"
  42 #include "content/renderer/gpu/mailbox_output_surface.h"
  43 #include "content/renderer/gpu/queue_message_swap_promise.h"
  44 #include "content/renderer/gpu/render_widget_compositor.h"
  45 #include "content/renderer/ime_event_guard.h"
  46 #include "content/renderer/input/input_handler_manager.h"
  47 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
  48 #include "content/renderer/render_frame_impl.h"
  49 #include "content/renderer/render_frame_proxy.h"
  50 #include "content/renderer/render_process.h"
  51 #include "content/renderer/render_thread_impl.h"
  52 #include "content/renderer/renderer_blink_platform_impl.h"
  53 #include "content/renderer/resizing_mode_selector.h"
  54 #include "ipc/ipc_sync_message.h"
  55 #include "skia/ext/platform_canvas.h"
  56 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
  57 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
  58 #include "third_party/WebKit/public/platform/WebPoint.h"
  59 #include "third_party/WebKit/public/platform/WebRect.h"
  60 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
  61 #include "third_party/WebKit/public/platform/WebSize.h"
  62 #include "third_party/WebKit/public/platform/WebString.h"
  63 #include "third_party/WebKit/public/web/WebDeviceEmulationParams.h"
  64 #include "third_party/WebKit/public/web/WebFrameWidget.h"
  65 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  66 #include "third_party/WebKit/public/web/WebNode.h"
  67 #include "third_party/WebKit/public/web/WebPagePopup.h"
  68 #include "third_party/WebKit/public/web/WebPopupMenuInfo.h"
  69 #include "third_party/WebKit/public/web/WebRange.h"
  70 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  71 #include "third_party/WebKit/public/web/WebView.h"
  72 #include "third_party/skia/include/core/SkShader.h"
  73 #include "ui/base/ui_base_switches.h"
  74 #include "ui/gfx/geometry/point_conversions.h"
  75 #include "ui/gfx/geometry/rect_conversions.h"
  76 #include "ui/gfx/geometry/size_conversions.h"
  77 #include "ui/gfx/skia_util.h"
  78 #include "ui/gl/gl_switches.h"
  79 #include "ui/surface/transport_dib.h"
  80
  81 #if defined(OS_ANDROID)
  82 #include <android/keycodes.h>
  83 #include "content/renderer/android/synchronous_compositor_factory.h"
  84 #endif
  85
  86 #if defined(OS_POSIX)
  87 #include "ipc/ipc_channel_posix.h"
  88 #include "third_party/skia/include/core/SkMallocPixelRef.h"
  89 #include "third_party/skia/include/core/SkPixelRef.h"
  90 #endif  // defined(OS_POSIX)
  91
  92 #include "third_party/WebKit/public/web/WebWidget.h"
  93
  94 using blink::WebCompositionUnderline;
  95 using blink::WebCursorInfo;
  96 using blink::WebDeviceEmulationParams;
  97 using blink::WebGestureEvent;
  98 using blink::WebInputEvent;
  99 using blink::WebKeyboardEvent;
 100 using blink::WebMouseEvent;
 101 using blink::WebMouseWheelEvent;
 102 using blink::WebNavigationPolicy;
 103 using blink::WebNode;
 104 using blink::WebPagePopup;
 105 using blink::WebPoint;
 106 using blink::WebPopupType;
 107 using blink::WebRange;
 108 using blink::WebRect;
 109 using blink::WebScreenInfo;
 110 using blink::WebSize;
 111 using blink::WebTextDirection;
 112 using blink::WebTouchEvent;
 113 using blink::WebTouchPoint;
 114 using blink::WebVector;
 115 using blink::WebWidget;
 116
 117 namespace {
 118
 119 typedef std::map<std::string, ui::TextInputMode> TextInputModeMap;
 120
 121 class TextInputModeMapSingleton {
 122  public:
 123   static TextInputModeMapSingleton* GetInstance() {
 124     return Singleton<TextInputModeMapSingleton>::get();
 125   }
 126   TextInputModeMapSingleton() {
 127     map_["verbatim"] = ui::TEXT_INPUT_MODE_VERBATIM;
 128     map_["latin"] = ui::TEXT_INPUT_MODE_LATIN;
 129     map_["latin-name"] = ui::TEXT_INPUT_MODE_LATIN_NAME;
 130     map_["latin-prose"] = ui::TEXT_INPUT_MODE_LATIN_PROSE;
 131     map_["full-width-latin"] = ui::TEXT_INPUT_MODE_FULL_WIDTH_LATIN;
 132     map_["kana"] = ui::TEXT_INPUT_MODE_KANA;
 133     map_["katakana"] = ui::TEXT_INPUT_MODE_KATAKANA;
 134     map_["numeric"] = ui::TEXT_INPUT_MODE_NUMERIC;
 135     map_["tel"] = ui::TEXT_INPUT_MODE_TEL;
 136     map_["email"] = ui::TEXT_INPUT_MODE_EMAIL;
 137     map_["url"] = ui::TEXT_INPUT_MODE_URL;
 138   }
 139   const TextInputModeMap& map() const { return map_; }
 140  private:
 141   TextInputModeMap map_;
 142
 143   friend struct DefaultSingletonTraits<TextInputModeMapSingleton>;
 144
 145   DISALLOW_COPY_AND_ASSIGN(TextInputModeMapSingleton);
 146 };
 147
 148 ui::TextInputMode ConvertInputMode(const blink::WebString& input_mode) {
 149   static TextInputModeMapSingleton* singleton =
 150       TextInputModeMapSingleton::GetInstance();
 151   TextInputModeMap::const_iterator it =
 152       singleton->map().find(input_mode.utf8());
 153   if (it == singleton->map().end())
 154     return ui::TEXT_INPUT_MODE_DEFAULT;
 155   return it->second;
 156 }
 157
 158 // TODO(brianderson): Replace the hard-coded threshold with a fraction of
 159 // the BeginMainFrame interval.
 160 // 4166us will allow 1/4 of a 60Hz interval or 1/2 of a 120Hz interval to
 161 // be spent in input hanlders before input starts getting throttled.
 162 const int kInputHandlingTimeThrottlingThresholdMicroseconds = 4166;
 163
 164 int64 GetEventLatencyMicros(const WebInputEvent& event, base::TimeTicks now) {
 165   return (now - base::TimeDelta::FromSecondsD(event.timeStampSeconds))
 166       .ToInternalValue();
 167 }
 168
 169 void LogInputEventLatencyUma(const WebInputEvent& event, base::TimeTicks now) {
 170   UMA_HISTOGRAM_CUSTOM_COUNTS(
 171       "Event.AggregatedLatency.Renderer2",
 172       GetEventLatencyMicros(event, now),
 173       1,
 174       10000000,
 175       100);
 176
 177 #define CASE_TYPE(t) \
 178     case WebInputEvent::t: \
 179       UMA_HISTOGRAM_CUSTOM_COUNTS( \
 180           "Event.Latency.Renderer2." #t, \
 181           GetEventLatencyMicros(event, now), \
 182           1, \
 183           10000000, \
 184           100); \
 185       break;
 186
 187   switch(event.type) {
 188     CASE_TYPE(Undefined);
 189     CASE_TYPE(MouseDown);
 190     CASE_TYPE(MouseUp);
 191     CASE_TYPE(MouseMove);
 192     CASE_TYPE(MouseEnter);
 193     CASE_TYPE(MouseLeave);
 194     CASE_TYPE(ContextMenu);
 195     CASE_TYPE(MouseWheel);
 196     CASE_TYPE(RawKeyDown);
 197     CASE_TYPE(KeyDown);
 198     CASE_TYPE(KeyUp);
 199     CASE_TYPE(Char);
 200     CASE_TYPE(GestureScrollBegin);
 201     CASE_TYPE(GestureScrollEnd);
 202     CASE_TYPE(GestureScrollUpdate);
 203     CASE_TYPE(GestureFlingStart);
 204     CASE_TYPE(GestureFlingCancel);
 205     CASE_TYPE(GestureShowPress);
 206     CASE_TYPE(GestureTap);
 207     CASE_TYPE(GestureTapUnconfirmed);
 208     CASE_TYPE(GestureTapDown);
 209     CASE_TYPE(GestureTapCancel);
 210     CASE_TYPE(GestureDoubleTap);
 211     CASE_TYPE(GestureTwoFingerTap);
 212     CASE_TYPE(GestureLongPress);
 213     CASE_TYPE(GestureLongTap);
 214     CASE_TYPE(GesturePinchBegin);
 215     CASE_TYPE(GesturePinchEnd);
 216     CASE_TYPE(GesturePinchUpdate);
 217     CASE_TYPE(TouchStart);
 218     CASE_TYPE(TouchMove);
 219     CASE_TYPE(TouchEnd);
 220     CASE_TYPE(TouchCancel);
 221     default:
 222       // Must include default to let blink::WebInputEvent add new event types
 223       // before they're added here.
 224       DLOG(WARNING) << "Unhandled WebInputEvent type: " << event.type;
 225       break;
 226   }
 227
 228 #undef CASE_TYPE
 229 }
 230
 231 }  // namespace
 232
 233 namespace content {
 234
 235 // RenderWidget::ScreenMetricsEmulator ----------------------------------------
 236
 237 class RenderWidget::ScreenMetricsEmulator {
 238  public:
 239   ScreenMetricsEmulator(
 240       RenderWidget* widget,
 241       const WebDeviceEmulationParams& params);
 242   virtual ~ScreenMetricsEmulator();
 243
 244   // Scale and offset used to convert between host coordinates
 245   // and webwidget coordinates.
 246   float scale() { return scale_; }
 247   gfx::PointF offset() { return offset_; }
 248   gfx::Rect applied_widget_rect() const { return applied_widget_rect_; }
 249   gfx::Rect original_screen_rect() const { return original_view_screen_rect_; }
 250   const WebScreenInfo& original_screen_info() { return original_screen_info_; }
 251
 252   void ChangeEmulationParams(
 253       const WebDeviceEmulationParams& params);
 254
 255   // The following methods alter handlers' behavior for messages related to
 256   // widget size and position.
 257   void OnResizeMessage(const ViewMsg_Resize_Params& params);
 258   void OnUpdateScreenRectsMessage(const gfx::Rect& view_screen_rect,
 259                                   const gfx::Rect& window_screen_rect);
 260   void OnShowContextMenu(ContextMenuParams* params);
 261   gfx::Rect AdjustValidationMessageAnchor(const gfx::Rect& anchor);
 262
 263  private:
 264   void Reapply();
 265   void Apply(bool top_controls_shrink_blink_size,
 266              float top_controls_height,
 267              gfx::Rect resizer_rect,
 268              bool is_fullscreen_granted,
 269              blink::WebDisplayMode display_mode);
 270
 271   RenderWidget* widget_;
 272
 273   // Parameters as passed by RenderWidget::EnableScreenMetricsEmulation.
 274   WebDeviceEmulationParams params_;
 275
 276   // The computed scale and offset used to fit widget into browser window.
 277   float scale_;
 278   gfx::PointF offset_;
 279
 280   // Widget rect as passed to webwidget.
 281   gfx::Rect applied_widget_rect_;
 282
 283   // Original values to restore back after emulation ends.
 284   gfx::Size original_size_;
 285   gfx::Size original_physical_backing_size_;
 286   gfx::Size original_visible_viewport_size_;
 287   blink::WebScreenInfo original_screen_info_;
 288   gfx::Rect original_view_screen_rect_;
 289   gfx::Rect original_window_screen_rect_;
 290 };
 291
 292 RenderWidget::ScreenMetricsEmulator::ScreenMetricsEmulator(
 293     RenderWidget* widget,
 294     const WebDeviceEmulationParams& params)
 295     : widget_(widget),
 296       params_(params),
 297       scale_(1.f) {
 298   original_size_ = widget_->size_;
 299   original_physical_backing_size_ = widget_->physical_backing_size_;
 300   original_visible_viewport_size_ = widget_->visible_viewport_size_;
 301   original_screen_info_ = widget_->screen_info_;
 302   original_view_screen_rect_ = widget_->view_screen_rect_;
 303   original_window_screen_rect_ = widget_->window_screen_rect_;
 304   Apply(widget_->top_controls_shrink_blink_size_,
 305         widget_->top_controls_height_,
 306         widget_->resizer_rect_,
 307         widget_->is_fullscreen_granted_,
 308         widget_->display_mode_);
 309 }
 310
 311 RenderWidget::ScreenMetricsEmulator::~ScreenMetricsEmulator() {
 312   widget_->screen_info_ = original_screen_info_;
 313
 314   widget_->SetDeviceScaleFactor(original_screen_info_.deviceScaleFactor);
 315   widget_->SetScreenMetricsEmulationParameters(false, params_);
 316   widget_->view_screen_rect_ = original_view_screen_rect_;
 317   widget_->window_screen_rect_ = original_window_screen_rect_;
 318   widget_->Resize(original_size_,
 319                   original_physical_backing_size_,
 320                   widget_->top_controls_shrink_blink_size_,
 321                   widget_->top_controls_height_,
 322                   original_visible_viewport_size_,
 323                   widget_->resizer_rect_,
 324                   widget_->is_fullscreen_granted_,
 325                   widget_->display_mode_,
 326                   NO_RESIZE_ACK);
 327 }
 328
 329 void RenderWidget::ScreenMetricsEmulator::ChangeEmulationParams(
 330     const WebDeviceEmulationParams& params) {
 331   params_ = params;
 332   Reapply();
 333 }
 334
 335 void RenderWidget::ScreenMetricsEmulator::Reapply() {
 336   Apply(widget_->top_controls_shrink_blink_size_,
 337         widget_->top_controls_height_,
 338         widget_->resizer_rect_,
 339         widget_->is_fullscreen_granted_,
 340         widget_->display_mode_);
 341 }
 342
 343 void RenderWidget::ScreenMetricsEmulator::Apply(
 344     bool top_controls_shrink_blink_size,
 345     float top_controls_height,
 346     gfx::Rect resizer_rect,
 347     bool is_fullscreen_granted,
 348     blink::WebDisplayMode display_mode) {
 349   applied_widget_rect_.set_size(gfx::Size(params_.viewSize));
 350   if (!applied_widget_rect_.width())
 351     applied_widget_rect_.set_width(original_size_.width());
 352   if (!applied_widget_rect_.height())
 353     applied_widget_rect_.set_height(original_size_.height());
 354
 355   if (params_.fitToView && !original_size_.IsEmpty()) {
 356     int original_width = std::max(original_size_.width(), 1);
 357     int original_height = std::max(original_size_.height(), 1);
 358     float width_ratio =
 359         static_cast<float>(applied_widget_rect_.width()) / original_width;
 360     float height_ratio =
 361         static_cast<float>(applied_widget_rect_.height()) / original_height;
 362     float ratio = std::max(1.0f, std::max(width_ratio, height_ratio));
 363     scale_ = 1.f / ratio;
 364
 365     // Center emulated view inside available view space.
 366     offset_.set_x(
 367         (original_size_.width() - scale_ * applied_widget_rect_.width()) / 2);
 368     offset_.set_y(
 369         (original_size_.height() - scale_ * applied_widget_rect_.height()) / 2);
 370   } else {
 371     scale_ = params_.scale;
 372     offset_.SetPoint(params_.offset.x, params_.offset.y);
 373   }
 374
 375   if (params_.screenPosition == WebDeviceEmulationParams::Desktop) {
 376     applied_widget_rect_.set_origin(original_view_screen_rect_.origin());
 377     widget_->screen_info_.rect = original_screen_info_.rect;
 378     widget_->screen_info_.availableRect = original_screen_info_.availableRect;
 379     widget_->window_screen_rect_ = original_window_screen_rect_;
 380   } else {
 381     applied_widget_rect_.set_origin(params_.viewPosition);
 382     gfx::Rect screen_rect = applied_widget_rect_;
 383     if (!params_.screenSize.isEmpty()) {
 384       screen_rect =
 385           gfx::Rect(0, 0, params_.screenSize.width, params_.screenSize.height);
 386     }
 387     widget_->screen_info_.rect = screen_rect;
 388     widget_->screen_info_.availableRect = screen_rect;
 389     widget_->window_screen_rect_ = applied_widget_rect_;
 390   }
 391
 392   float applied_device_scale_factor = params_.deviceScaleFactor ?
 393       params_.deviceScaleFactor : original_screen_info_.deviceScaleFactor;
 394   widget_->screen_info_.deviceScaleFactor = applied_device_scale_factor;
 395
 396   // Pass three emulation parameters to the blink side:
 397   // - we keep the real device scale factor in compositor to produce sharp image
 398   //   even when emulating different scale factor;
 399   // - in order to fit into view, WebView applies offset and scale to the
 400   //   root layer.
 401   blink::WebDeviceEmulationParams modified_params = params_;
 402   modified_params.deviceScaleFactor = original_screen_info_.deviceScaleFactor;
 403   modified_params.offset = blink::WebFloatPoint(offset_.x(), offset_.y());
 404   modified_params.scale = scale_;
 405   widget_->SetScreenMetricsEmulationParameters(true, modified_params);
 406
 407   widget_->SetDeviceScaleFactor(applied_device_scale_factor);
 408   widget_->view_screen_rect_ = applied_widget_rect_;
 409
 410   gfx::Size physical_backing_size = gfx::ToCeiledSize(gfx::ScaleSize(
 411       original_size_, original_screen_info_.deviceScaleFactor));
 412   widget_->Resize(applied_widget_rect_.size(),
 413                   physical_backing_size,
 414                   top_controls_shrink_blink_size,
 415                   top_controls_height,
 416                   applied_widget_rect_.size(),
 417                   resizer_rect,
 418                   is_fullscreen_granted,
 419                   display_mode,
 420                   NO_RESIZE_ACK);
 421 }
 422
 423 void RenderWidget::ScreenMetricsEmulator::OnResizeMessage(
 424     const ViewMsg_Resize_Params& params) {
 425   bool need_ack = params.new_size != original_size_ &&
 426       !params.new_size.IsEmpty() && !params.physical_backing_size.IsEmpty();
 427   original_size_ = params.new_size;
 428   original_physical_backing_size_ = params.physical_backing_size;
 429   original_screen_info_ = params.screen_info;
 430   original_visible_viewport_size_ = params.visible_viewport_size;
 431   Apply(params.top_controls_shrink_blink_size,
 432         params.top_controls_height,
 433         params.resizer_rect,
 434         params.is_fullscreen_granted,
 435         params.display_mode);
 436
 437   if (need_ack) {
 438     widget_->set_next_paint_is_resize_ack();
 439     if (widget_->compositor_)
 440       widget_->compositor_->SetNeedsRedrawRect(gfx::Rect(widget_->size_));
 441   }
 442 }
 443
 444 void RenderWidget::ScreenMetricsEmulator::OnUpdateScreenRectsMessage(
 445     const gfx::Rect& view_screen_rect,
 446     const gfx::Rect& window_screen_rect) {
 447   original_view_screen_rect_ = view_screen_rect;
 448   original_window_screen_rect_ = window_screen_rect;
 449   if (params_.screenPosition == WebDeviceEmulationParams::Desktop)
 450     Reapply();
 451 }
 452
 453 void RenderWidget::ScreenMetricsEmulator::OnShowContextMenu(
 454     ContextMenuParams* params) {
 455   params->x *= scale_;
 456   params->x += offset_.x();
 457   params->y *= scale_;
 458   params->y += offset_.y();
 459 }
 460
 461 gfx::Rect RenderWidget::ScreenMetricsEmulator::AdjustValidationMessageAnchor(
 462     const gfx::Rect& anchor) {
 463   gfx::Rect scaled = gfx::ToEnclosedRect(gfx::ScaleRect(anchor, scale_));
 464   scaled.set_x(scaled.x() + offset_.x());
 465   scaled.set_y(scaled.y() + offset_.y());
 466   return scaled;
 467 }
 468
 469 // RenderWidget ---------------------------------------------------------------
 470
 471 RenderWidget::RenderWidget(CompositorDependencies* compositor_deps,
 472                            blink::WebPopupType popup_type,
 473                            const blink::WebScreenInfo& screen_info,
 474                            bool swapped_out,
 475                            bool hidden,
 476                            bool never_visible)
 477     : routing_id_(MSG_ROUTING_NONE),
 478       surface_id_(0),
 479       compositor_deps_(compositor_deps),
 480       webwidget_(nullptr),
 481       opener_id_(MSG_ROUTING_NONE),
 482       init_complete_(false),
 483       top_controls_shrink_blink_size_(false),
 484       top_controls_height_(0.f),
 485       next_paint_flags_(0),
 486       auto_resize_mode_(false),
 487       need_update_rect_for_auto_resize_(false),
 488       did_show_(false),
 489       is_hidden_(hidden),
 490       never_visible_(never_visible),
 491       is_fullscreen_granted_(false),
 492       display_mode_(blink::WebDisplayModeUndefined),
 493       has_focus_(false),
 494       handling_input_event_(false),
 495       handling_event_overscroll_(nullptr),
 496       handling_ime_event_(false),
 497       handling_event_type_(WebInputEvent::Undefined),
 498       ignore_ack_for_mouse_move_from_debugger_(false),
 499       closing_(false),
 500       host_closing_(false),
 501       is_swapped_out_(swapped_out),
 502       for_oopif_(false),
 503       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
 504       text_input_mode_(ui::TEXT_INPUT_MODE_DEFAULT),
 505       text_input_flags_(0),
 506       can_compose_inline_(true),
 507       popup_type_(popup_type),
 508       pending_window_rect_count_(0),
 509       suppress_next_char_events_(false),
 510       screen_info_(screen_info),
 511       device_scale_factor_(screen_info_.deviceScaleFactor),
 512       current_event_latency_info_(NULL),
 513       next_output_surface_id_(0),
 514 #if defined(OS_ANDROID)
 515       text_field_is_dirty_(false),
 516       outstanding_ime_acks_(0),
 517       body_background_color_(SK_ColorWHITE),
 518 #endif
 519       popup_origin_scale_for_emulation_(0.f),
 520       frame_swap_message_queue_(new FrameSwapMessageQueue()),
 521       resizing_mode_selector_(new ResizingModeSelector()),
 522       context_menu_source_type_(ui::MENU_SOURCE_MOUSE),
 523       has_host_context_menu_location_(false) {
 524   if (!swapped_out)
 525     RenderProcess::current()->AddRefProcess();
 526   DCHECK(RenderThread::Get());
 527   device_color_profile_.push_back('0');
 528 }
 529
 530 RenderWidget::~RenderWidget() {
 531   DCHECK(!webwidget_) << "Leaking our WebWidget!";
 532
 533   // If we are swapped out, we have released already.
 534   if (!is_swapped_out_ && RenderProcess::current())
 535     RenderProcess::current()->ReleaseProcess();
 536 }
 537
 538 // static
 539 RenderWidget* RenderWidget::Create(int32 opener_id,
 540                                    CompositorDependencies* compositor_deps,
 541                                    blink::WebPopupType popup_type,
 542                                    const blink::WebScreenInfo& screen_info) {
 543   DCHECK(opener_id != MSG_ROUTING_NONE);
 544   scoped_refptr<RenderWidget> widget(new RenderWidget(
 545       compositor_deps, popup_type, screen_info, false, false, false));
 546   if (widget->Init(opener_id)) {  // adds reference on success.
 547     return widget.get();
 548   }
 549   return NULL;
 550 }
 551
 552 // static
 553 RenderWidget* RenderWidget::CreateForFrame(
 554     int routing_id,
 555     int surface_id,
 556     bool hidden,
 557     const blink::WebScreenInfo& screen_info,
 558     CompositorDependencies* compositor_deps,
 559     blink::WebLocalFrame* frame) {
 560   CHECK_NE(routing_id, MSG_ROUTING_NONE);
 561   scoped_refptr<RenderWidget> widget(
 562       new RenderWidget(compositor_deps, blink::WebPopupTypeNone, screen_info,
 563                        false, hidden, false));
 564   widget->routing_id_ = routing_id;
 565   widget->surface_id_ = surface_id;
 566   widget->for_oopif_ = true;
 567   // DoInit increments the reference count on |widget|, keeping it alive after
 568   // this function returns.
 569   if (widget->DoInit(MSG_ROUTING_NONE,
 570                      RenderWidget::CreateWebFrameWidget(widget.get(), frame),
 571                      nullptr)) {
 572     widget->CompleteInit();
 573     return widget.get();
 574   }
 575   return nullptr;
 576 }
 577
 578 // static
 579 blink::WebWidget* RenderWidget::CreateWebFrameWidget(
 580     RenderWidget* render_widget,
 581     blink::WebLocalFrame* frame) {
 582   return blink::WebFrameWidget::create(render_widget, frame);
 583 }
 584
 585 // static
 586 blink::WebWidget* RenderWidget::CreateWebWidget(RenderWidget* render_widget) {
 587   switch (render_widget->popup_type_) {
 588     case blink::WebPopupTypeNone:  // Nothing to create.
 589       break;
 590     case blink::WebPopupTypePage:
 591       return WebPagePopup::create(render_widget);
 592     default:
 593       NOTREACHED();
 594   }
 595   return NULL;
 596 }
 597
 598 void RenderWidget::CloseForFrame() {
 599   OnClose();
 600 }
 601
 602 bool RenderWidget::Init(int32 opener_id) {
 603   return DoInit(opener_id, RenderWidget::CreateWebWidget(this),
 604                 new ViewHostMsg_CreateWidget(opener_id, popup_type_,
 605                                              &routing_id_, &surface_id_));
 606 }
 607
 608 bool RenderWidget::DoInit(int32 opener_id,
 609                           WebWidget* web_widget,
 610                           IPC::SyncMessage* create_widget_message) {
 611   DCHECK(!webwidget_);
 612
 613   if (opener_id != MSG_ROUTING_NONE)
 614     opener_id_ = opener_id;
 615
 616   webwidget_ = web_widget;
 617
 618   bool result = true;
 619   if (create_widget_message)
 620     result = RenderThread::Get()->Send(create_widget_message);
 621
 622   if (result) {
 623     RenderThread::Get()->AddRoute(routing_id_, this);
 624     // Take a reference on behalf of the RenderThread.  This will be balanced
 625     // when we receive ViewMsg_Close.
 626     AddRef();
 627     if (RenderThreadImpl::current()) {
 628       RenderThreadImpl::current()->WidgetCreated();
 629       if (is_hidden_)
 630         RenderThreadImpl::current()->WidgetHidden();
 631     }
 632     return true;
 633   } else {
 634     // The above Send can fail when the tab is closing.
 635     return false;
 636   }
 637 }
 638
 639 // This is used to complete pending inits and non-pending inits.
 640 void RenderWidget::CompleteInit() {
 641   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 642
 643   init_complete_ = true;
 644
 645   if (compositor_)
 646     StartCompositor();
 647
 648   Send(new ViewHostMsg_RenderViewReady(routing_id_));
 649 }
 650
 651 void RenderWidget::SetSwappedOut(bool is_swapped_out) {
 652   // We should only toggle between states.
 653   DCHECK(is_swapped_out_ != is_swapped_out);
 654   is_swapped_out_ = is_swapped_out;
 655
 656   // If we are swapping out, we will call ReleaseProcess, allowing the process
 657   // to exit if all of its RenderViews are swapped out.  We wait until the
 658   // WasSwappedOut call to do this, to allow the unload handler to finish.
 659   // If we are swapping in, we call AddRefProcess to prevent the process from
 660   // exiting.
 661   if (!is_swapped_out_)
 662     RenderProcess::current()->AddRefProcess();
 663 }
 664
 665 void RenderWidget::WasSwappedOut() {
 666   // If we have been swapped out and no one else is using this process,
 667   // it's safe to exit now.
 668   CHECK(is_swapped_out_);
 669   RenderProcess::current()->ReleaseProcess();
 670 }
 671
 672 void RenderWidget::SetPopupOriginAdjustmentsForEmulation(
 673     ScreenMetricsEmulator* emulator) {
 674   popup_origin_scale_for_emulation_ = emulator->scale();
 675   popup_view_origin_for_emulation_ = emulator->applied_widget_rect().origin();
 676   popup_screen_origin_for_emulation_ = gfx::Point(
 677       emulator->original_screen_rect().origin().x() + emulator->offset().x(),
 678       emulator->original_screen_rect().origin().y() + emulator->offset().y());
 679   screen_info_ = emulator->original_screen_info();
 680   device_scale_factor_ = screen_info_.deviceScaleFactor;
 681 }
 682
 683 gfx::Rect RenderWidget::AdjustValidationMessageAnchor(const gfx::Rect& anchor) {
 684   if (screen_metrics_emulator_)
 685     return screen_metrics_emulator_->AdjustValidationMessageAnchor(anchor);
 686   return anchor;
 687 }
 688
 689 void RenderWidget::SetScreenMetricsEmulationParameters(
 690     bool enabled,
 691     const blink::WebDeviceEmulationParams& params) {
 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 bool RenderWidget::OnMessageReceived(const IPC::Message& message) {
 710   bool handled = true;
 711   IPC_BEGIN_MESSAGE_MAP(RenderWidget, message)
 712     IPC_MESSAGE_HANDLER(InputMsg_HandleInputEvent, OnHandleInputEvent)
 713     IPC_MESSAGE_HANDLER(InputMsg_CursorVisibilityChange,
 714                         OnCursorVisibilityChange)
 715     IPC_MESSAGE_HANDLER(InputMsg_ImeSetComposition, OnImeSetComposition)
 716     IPC_MESSAGE_HANDLER(InputMsg_ImeConfirmComposition, OnImeConfirmComposition)
 717     IPC_MESSAGE_HANDLER(InputMsg_MouseCaptureLost, OnMouseCaptureLost)
 718     IPC_MESSAGE_HANDLER(InputMsg_SetFocus, OnSetFocus)
 719     IPC_MESSAGE_HANDLER(InputMsg_SyntheticGestureCompleted,
 720                         OnSyntheticGestureCompleted)
 721     IPC_MESSAGE_HANDLER(ViewMsg_Close, OnClose)
 722     IPC_MESSAGE_HANDLER(ViewMsg_CreatingNew_ACK, OnCreatingNewAck)
 723     IPC_MESSAGE_HANDLER(ViewMsg_Resize, OnResize)
 724     IPC_MESSAGE_HANDLER(ViewMsg_EnableDeviceEmulation,
 725                         OnEnableDeviceEmulation)
 726     IPC_MESSAGE_HANDLER(ViewMsg_DisableDeviceEmulation,
 727                         OnDisableDeviceEmulation)
 728     IPC_MESSAGE_HANDLER(ViewMsg_ColorProfile, OnColorProfile)
 729     IPC_MESSAGE_HANDLER(ViewMsg_ChangeResizeRect, OnChangeResizeRect)
 730     IPC_MESSAGE_HANDLER(ViewMsg_WasHidden, OnWasHidden)
 731     IPC_MESSAGE_HANDLER(ViewMsg_WasShown, OnWasShown)
 732     IPC_MESSAGE_HANDLER(ViewMsg_Repaint, OnRepaint)
 733     IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
 734     IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
 735     IPC_MESSAGE_HANDLER(ViewMsg_UpdateScreenRects, OnUpdateScreenRects)
 736     IPC_MESSAGE_HANDLER(ViewMsg_SetSurfaceIdNamespace, OnSetSurfaceIdNamespace)
 737 #if defined(OS_ANDROID)
 738     IPC_MESSAGE_HANDLER(ViewMsg_ShowImeIfNeeded, OnShowImeIfNeeded)
 739     IPC_MESSAGE_HANDLER(ViewMsg_ImeEventAck, OnImeEventAck)
 740 #endif
 741     IPC_MESSAGE_UNHANDLED(handled = false)
 742   IPC_END_MESSAGE_MAP()
 743   return handled;
 744 }
 745
 746 bool RenderWidget::Send(IPC::Message* message) {
 747   // Don't send any messages after the browser has told us to close, and filter
 748   // most outgoing messages while swapped out.
 749   if ((is_swapped_out_ &&
 750        !SwappedOutMessages::CanSendWhileSwappedOut(message)) ||
 751       closing_) {
 752     delete message;
 753     return false;
 754   }
 755
 756   // If given a messsage without a routing ID, then assign our routing ID.
 757   if (message->routing_id() == MSG_ROUTING_NONE)
 758     message->set_routing_id(routing_id_);
 759
 760   return RenderThread::Get()->Send(message);
 761 }
 762
 763 void RenderWidget::Resize(const gfx::Size& new_size,
 764                           const gfx::Size& physical_backing_size,
 765                           bool top_controls_shrink_blink_size,
 766                           float top_controls_height,
 767                           const gfx::Size& visible_viewport_size,
 768                           const gfx::Rect& resizer_rect,
 769                           bool is_fullscreen_granted,
 770                           blink::WebDisplayMode display_mode,
 771                           const ResizeAck resize_ack) {
 772   if (resizing_mode_selector_->NeverUsesSynchronousResize()) {
 773     // A resize ack shouldn't be requested if we have not ACK'd the previous
 774     // one.
 775     DCHECK(resize_ack != SEND_RESIZE_ACK || !next_paint_is_resize_ack());
 776     DCHECK(resize_ack == SEND_RESIZE_ACK || resize_ack == NO_RESIZE_ACK);
 777   }
 778
 779   // Ignore this during shutdown.
 780   if (!webwidget_)
 781     return;
 782
 783   if (compositor_) {
 784     compositor_->setViewportSize(new_size, physical_backing_size);
 785   }
 786
 787   physical_backing_size_ = physical_backing_size;
 788   top_controls_shrink_blink_size_ = top_controls_shrink_blink_size;
 789   top_controls_height_ = top_controls_height;
 790   visible_viewport_size_ = visible_viewport_size;
 791   resizer_rect_ = resizer_rect;
 792
 793   // NOTE: We may have entered fullscreen mode without changing our size.
 794   bool fullscreen_change = is_fullscreen_granted_ != is_fullscreen_granted;
 795   is_fullscreen_granted_ = is_fullscreen_granted;
 796   display_mode_ = display_mode;
 797
 798   webwidget_->setTopControlsHeight(top_controls_height,
 799                                    top_controls_shrink_blink_size_);
 800
 801   if (size_ != new_size) {
 802     size_ = new_size;
 803
 804     // When resizing, we want to wait to paint before ACK'ing the resize.  This
 805     // ensures that we only resize as fast as we can paint.  We only need to
 806     // send an ACK if we are resized to a non-empty rect.
 807     webwidget_->resize(new_size);
 808   }
 809
 810   webwidget()->resizePinchViewport(gfx::Size(
 811       visible_viewport_size.width(),
 812       visible_viewport_size.height()));
 813
 814   if (new_size.IsEmpty() || physical_backing_size.IsEmpty()) {
 815     // In this case there is no paint/composite and therefore no
 816     // ViewHostMsg_UpdateRect to send the resize ack with. We'd need to send the
 817     // ack through a fake ViewHostMsg_UpdateRect or a different message.
 818     DCHECK_EQ(resize_ack, NO_RESIZE_ACK);
 819   }
 820
 821   // Send the Resize_ACK flag once we paint again if requested.
 822   if (resize_ack == SEND_RESIZE_ACK)
 823     set_next_paint_is_resize_ack();
 824
 825   if (fullscreen_change)
 826     DidToggleFullscreen();
 827
 828   // If a resize ack is requested and it isn't set-up, then no more resizes will
 829   // come in and in general things will go wrong.
 830   DCHECK(resize_ack != SEND_RESIZE_ACK || next_paint_is_resize_ack());
 831 }
 832
 833 void RenderWidget::SetWindowRectSynchronously(
 834     const gfx::Rect& new_window_rect) {
 835   Resize(new_window_rect.size(),
 836          new_window_rect.size(),
 837          top_controls_shrink_blink_size_,
 838          top_controls_height_,
 839          new_window_rect.size(),
 840          gfx::Rect(),
 841          is_fullscreen_granted_,
 842          display_mode_,
 843          NO_RESIZE_ACK);
 844   view_screen_rect_ = new_window_rect;
 845   window_screen_rect_ = new_window_rect;
 846   if (!did_show_)
 847     initial_rect_ = new_window_rect;
 848 }
 849
 850 void RenderWidget::OnClose() {
 851   DCHECK(content::RenderThread::Get());
 852   if (closing_)
 853     return;
 854   NotifyOnClose();
 855   closing_ = true;
 856
 857   // Browser correspondence is no longer needed at this point.
 858   if (routing_id_ != MSG_ROUTING_NONE) {
 859     RenderThread::Get()->RemoveRoute(routing_id_);
 860     SetHidden(false);
 861     if (RenderThreadImpl::current())
 862       RenderThreadImpl::current()->WidgetDestroyed();
 863   }
 864
 865   if (for_oopif_) {
 866     // Widgets for frames may be created and closed at any time while the frame
 867     // is alive. However, the closing process must happen synchronously. Frame
 868     // widget and frames hold pointers to each other. If Close() is deferred to
 869     // the message loop like in the non-frame widget case, WebWidget::close()
 870     // can end up accessing members of an already-deleted frame.
 871     Close();
 872   } else {
 873     // If there is a Send call on the stack, then it could be dangerous to close
 874     // now.  Post a task that only gets invoked when there are no nested message
 875     // loops.
 876     base::ThreadTaskRunnerHandle::Get()->PostNonNestableTask(
 877         FROM_HERE, base::Bind(&RenderWidget::Close, this));
 878   }
 879
 880   // Balances the AddRef taken when we called AddRoute.
 881   Release();
 882 }
 883
 884 // Got a response from the browser after the renderer decided to create a new
 885 // view.
 886 void RenderWidget::OnCreatingNewAck() {
 887   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 888
 889   CompleteInit();
 890 }
 891
 892 void RenderWidget::OnResize(const ViewMsg_Resize_Params& params) {
 893   if (resizing_mode_selector_->ShouldAbortOnResize(this, params))
 894     return;
 895
 896   if (screen_metrics_emulator_) {
 897     screen_metrics_emulator_->OnResizeMessage(params);
 898     return;
 899   }
 900
 901   bool orientation_changed =
 902       screen_info_.orientationAngle != params.screen_info.orientationAngle;
 903
 904   screen_info_ = params.screen_info;
 905   SetDeviceScaleFactor(screen_info_.deviceScaleFactor);
 906   Resize(params.new_size,
 907          params.physical_backing_size,
 908          params.top_controls_shrink_blink_size,
 909          params.top_controls_height,
 910          params.visible_viewport_size,
 911          params.resizer_rect,
 912          params.is_fullscreen_granted,
 913          params.display_mode,
 914          params.needs_resize_ack ? SEND_RESIZE_ACK : NO_RESIZE_ACK);
 915
 916   if (orientation_changed)
 917     OnOrientationChange();
 918 }
 919
 920 void RenderWidget::OnEnableDeviceEmulation(
 921    const blink::WebDeviceEmulationParams& params) {
 922   if (!screen_metrics_emulator_)
 923     screen_metrics_emulator_.reset(new ScreenMetricsEmulator(this, params));
 924   else
 925     screen_metrics_emulator_->ChangeEmulationParams(params);
 926 }
 927
 928 void RenderWidget::OnDisableDeviceEmulation() {
 929   screen_metrics_emulator_.reset();
 930 }
 931
 932 void RenderWidget::OnColorProfile(const std::vector<char>& color_profile) {
 933   SetDeviceColorProfile(color_profile);
 934 }
 935
 936 void RenderWidget::OnChangeResizeRect(const gfx::Rect& resizer_rect) {
 937   if (resizer_rect_ == resizer_rect)
 938     return;
 939   resizer_rect_ = resizer_rect;
 940   if (webwidget_)
 941     webwidget_->didChangeWindowResizerRect();
 942 }
 943
 944 void RenderWidget::OnWasHidden() {
 945   TRACE_EVENT0("renderer", "RenderWidget::OnWasHidden");
 946   // Go into a mode where we stop generating paint and scrolling events.
 947   SetHidden(true);
 948   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
 949                     WasHidden());
 950 }
 951
 952 void RenderWidget::OnWasShown(bool needs_repainting,
 953                               const ui::LatencyInfo& latency_info) {
 954   TRACE_EVENT0("renderer", "RenderWidget::OnWasShown");
 955   // During shutdown we can just ignore this message.
 956   if (!webwidget_)
 957     return;
 958
 959   // See OnWasHidden
 960   SetHidden(false);
 961   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
 962                     WasShown());
 963
 964   if (!needs_repainting)
 965     return;
 966
 967   // Generate a full repaint.
 968   if (compositor_) {
 969     ui::LatencyInfo swap_latency_info(latency_info);
 970     scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor(
 971         compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info));
 972     compositor_->SetNeedsForcedRedraw();
 973   }
 974   ScheduleComposite();
 975 }
 976
 977 void RenderWidget::OnRequestMoveAck() {
 978   DCHECK(pending_window_rect_count_);
 979   pending_window_rect_count_--;
 980 }
 981
 982 GURL RenderWidget::GetURLForGraphicsContext3D() {
 983   return GURL();
 984 }
 985
 986 scoped_ptr<cc::OutputSurface> RenderWidget::CreateOutputSurface(bool fallback) {
 987   // For widgets that are never visible, we don't start the compositor, so we
 988   // never get a request for a cc::OutputSurface.
 989   DCHECK(!never_visible_);
 990
 991 #if defined(OS_ANDROID)
 992   if (SynchronousCompositorFactory* factory =
 993       SynchronousCompositorFactory::GetInstance()) {
 994     return factory->CreateOutputSurface(routing_id(),
 995                                         frame_swap_message_queue_);
 996   }
 997 #endif
 998
 999   const base::CommandLine& command_line =
1000       *base::CommandLine::ForCurrentProcess();
1001   bool use_software = fallback;
1002   if (command_line.HasSwitch(switches::kDisableGpuCompositing))
1003     use_software = true;
1004
1005   scoped_refptr<ContextProviderCommandBuffer> context_provider;
1006   scoped_refptr<ContextProviderCommandBuffer> worker_context_provider;
1007   if (!use_software) {
1008     context_provider = ContextProviderCommandBuffer::Create(
1009         CreateGraphicsContext3D(), RENDER_COMPOSITOR_CONTEXT);
1010     if (!context_provider.get()) {
1011       // Cause the compositor to wait and try again.
1012       return scoped_ptr<cc::OutputSurface>();
1013     }
1014
1015     worker_context_provider = ContextProviderCommandBuffer::Create(
1016         CreateGraphicsContext3D(), RENDER_WORKER_CONTEXT);
1017     if (!worker_context_provider.get()) {
1018       // Cause the compositor to wait and try again.
1019       return scoped_ptr<cc::OutputSurface>();
1020     }
1021   }
1022
1023   uint32 output_surface_id = next_output_surface_id_++;
1024   if (command_line.HasSwitch(switches::kEnableDelegatedRenderer)) {
1025     DCHECK(compositor_deps_->GetCompositorImplThreadTaskRunner());
1026     return scoped_ptr<cc::OutputSurface>(new DelegatedCompositorOutputSurface(
1027         routing_id(), output_surface_id, context_provider,
1028         worker_context_provider, frame_swap_message_queue_));
1029   }
1030   if (!context_provider.get()) {
1031     scoped_ptr<cc::SoftwareOutputDevice> software_device(
1032         new cc::SoftwareOutputDevice());
1033
1034     return scoped_ptr<cc::OutputSurface>(new CompositorOutputSurface(
1035         routing_id(), output_surface_id, nullptr, nullptr,
1036         software_device.Pass(), frame_swap_message_queue_, true));
1037   }
1038
1039   if (command_line.HasSwitch(cc::switches::kCompositeToMailbox)) {
1040     // Composite-to-mailbox is currently used for layout tests in order to cause
1041     // them to draw inside in the renderer to do the readback there. This should
1042     // no longer be the case when crbug.com/311404 is fixed.
1043     DCHECK(RenderThreadImpl::current()->layout_test_mode());
1044     cc::ResourceFormat format = cc::RGBA_8888;
1045     if (base::SysInfo::IsLowEndDevice())
1046       format = cc::RGB_565;
1047     return scoped_ptr<cc::OutputSurface>(new MailboxOutputSurface(
1048         routing_id(), output_surface_id, context_provider,
1049         worker_context_provider, scoped_ptr<cc::SoftwareOutputDevice>(),
1050         frame_swap_message_queue_, format));
1051   }
1052   bool use_swap_compositor_frame_message = false;
1053   return scoped_ptr<cc::OutputSurface>(new CompositorOutputSurface(
1054       routing_id(), output_surface_id, context_provider,
1055       worker_context_provider, scoped_ptr<cc::SoftwareOutputDevice>(),
1056       frame_swap_message_queue_, use_swap_compositor_frame_message));
1057 }
1058
1059 void RenderWidget::OnSwapBuffersAborted() {
1060   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersAborted");
1061   // Schedule another frame so the compositor learns about it.
1062   ScheduleComposite();
1063 }
1064
1065 void RenderWidget::OnSwapBuffersPosted() {
1066   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersPosted");
1067 }
1068
1069 void RenderWidget::OnSwapBuffersComplete() {
1070   TRACE_EVENT0("renderer", "RenderWidget::OnSwapBuffersComplete");
1071
1072   // Notify subclasses that composited rendering was flushed to the screen.
1073   DidFlushPaint();
1074 }
1075
1076 void RenderWidget::OnHandleInputEvent(const blink::WebInputEvent* input_event,
1077                                       const ui::LatencyInfo& latency_info,
1078                                       bool is_keyboard_shortcut) {
1079   if (!input_event)
1080     return;
1081   base::AutoReset<bool> handling_input_event_resetter(&handling_input_event_,
1082                                                       true);
1083   base::AutoReset<WebInputEvent::Type> handling_event_type_resetter(
1084       &handling_event_type_, input_event->type);
1085
1086   // Calls into |didOverscroll()| while handling this event will populate
1087   // |event_overscroll|, which in turn will be bundled with the event ack.
1088   scoped_ptr<DidOverscrollParams> event_overscroll;
1089   base::AutoReset<scoped_ptr<DidOverscrollParams>*>
1090       handling_event_overscroll_resetter(&handling_event_overscroll_,
1091                                          &event_overscroll);
1092
1093 #if defined(OS_ANDROID)
1094   // On Android, when a key is pressed or sent from the Keyboard using IME,
1095   // |AdapterInputConnection| generates input key events to make sure all JS
1096   // listeners that monitor KeyUp and KeyDown events receive the proper key
1097   // code. Since this input key event comes from IME, we need to set the
1098   // IME event guard here to make sure it does not interfere with other IME
1099   // events.
1100   scoped_ptr<ImeEventGuard> ime_event_guard_maybe;
1101   if (WebInputEvent::isKeyboardEventType(input_event->type)) {
1102     const WebKeyboardEvent& key_event =
1103         *static_cast<const WebKeyboardEvent*>(input_event);
1104     // Some keys are special and it's essential that no events get blocked.
1105     if (key_event.nativeKeyCode != AKEYCODE_TAB &&
1106         key_event.nativeKeyCode != AKEYCODE_DPAD_CENTER &&
1107         key_event.nativeKeyCode != AKEYCODE_DPAD_LEFT &&
1108         key_event.nativeKeyCode != AKEYCODE_DPAD_RIGHT &&
1109         key_event.nativeKeyCode != AKEYCODE_DPAD_UP &&
1110         key_event.nativeKeyCode != AKEYCODE_DPAD_DOWN)
1111       ime_event_guard_maybe.reset(new ImeEventGuard(this));
1112   }
1113 #endif
1114
1115   base::AutoReset<const ui::LatencyInfo*> resetter(&current_event_latency_info_,
1116                                                    &latency_info);
1117
1118   base::TimeTicks start_time;
1119   if (base::TimeTicks::IsHighResolution())
1120     start_time = base::TimeTicks::Now();
1121
1122   TRACE_EVENT1("renderer,benchmark", "RenderWidget::OnHandleInputEvent",
1123                "event", WebInputEventTraits::GetName(input_event->type));
1124   TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("blink.HandleInputEvent");
1125   TRACE_EVENT_FLOW_STEP0(
1126       "input,benchmark",
1127       "LatencyInfo.Flow",
1128       TRACE_ID_DONT_MANGLE(latency_info.trace_id),
1129       "HanldeInputEventMain");
1130
1131   // If we don't have a high res timer, these metrics won't be accurate enough
1132   // to be worth collecting. Note that this does introduce some sampling bias.
1133   if (!start_time.is_null())
1134     LogInputEventLatencyUma(*input_event, start_time);
1135
1136   scoped_ptr<cc::SwapPromiseMonitor> latency_info_swap_promise_monitor;
1137   ui::LatencyInfo swap_latency_info(latency_info);
1138   if (compositor_) {
1139     latency_info_swap_promise_monitor =
1140         compositor_->CreateLatencyInfoSwapPromiseMonitor(&swap_latency_info)
1141             .Pass();
1142   }
1143
1144   bool prevent_default = false;
1145   if (WebInputEvent::isMouseEventType(input_event->type)) {
1146     const WebMouseEvent& mouse_event =
1147         *static_cast<const WebMouseEvent*>(input_event);
1148     TRACE_EVENT2("renderer", "HandleMouseMove",
1149                  "x", mouse_event.x, "y", mouse_event.y);
1150     context_menu_source_type_ = ui::MENU_SOURCE_MOUSE;
1151     prevent_default = WillHandleMouseEvent(mouse_event);
1152   }
1153
1154   if (WebInputEvent::isKeyboardEventType(input_event->type)) {
1155     context_menu_source_type_ = ui::MENU_SOURCE_KEYBOARD;
1156 #if defined(OS_ANDROID)
1157     // The DPAD_CENTER key on Android has a dual semantic: (1) in the general
1158     // case it should behave like a select key (i.e. causing a click if a button
1159     // is focused). However, if a text field is focused (2), its intended
1160     // behavior is to just show the IME and don't propagate the key.
1161     // A typical use case is a web form: the DPAD_CENTER should bring up the IME
1162     // when clicked on an input text field and cause the form submit if clicked
1163     // when the submit button is focused, but not vice-versa.
1164     // The UI layer takes care of translating DPAD_CENTER into a RETURN key,
1165     // but at this point we have to swallow the event for the scenario (2).
1166     const WebKeyboardEvent& key_event =
1167         *static_cast<const WebKeyboardEvent*>(input_event);
1168     if (key_event.nativeKeyCode == AKEYCODE_DPAD_CENTER &&
1169         GetTextInputType() != ui::TEXT_INPUT_TYPE_NONE) {
1170       OnShowImeIfNeeded();
1171       prevent_default = true;
1172     }
1173 #endif
1174   }
1175
1176   if (WebInputEvent::isGestureEventType(input_event->type)) {
1177     const WebGestureEvent& gesture_event =
1178         *static_cast<const WebGestureEvent*>(input_event);
1179     context_menu_source_type_ = ui::MENU_SOURCE_TOUCH;
1180     prevent_default = prevent_default || WillHandleGestureEvent(gesture_event);
1181   }
1182
1183   bool processed = prevent_default;
1184   if (input_event->type != WebInputEvent::Char || !suppress_next_char_events_) {
1185     suppress_next_char_events_ = false;
1186     if (!processed && webwidget_)
1187       processed = webwidget_->handleInputEvent(*input_event);
1188   }
1189
1190   // If this RawKeyDown event corresponds to a browser keyboard shortcut and
1191   // it's not processed by webkit, then we need to suppress the upcoming Char
1192   // events.
1193   if (!processed && is_keyboard_shortcut)
1194     suppress_next_char_events_ = true;
1195
1196   InputEventAckState ack_result = processed ?
1197       INPUT_EVENT_ACK_STATE_CONSUMED : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1198   if (!processed &&  input_event->type == WebInputEvent::TouchStart) {
1199     const WebTouchEvent& touch_event =
1200         *static_cast<const WebTouchEvent*>(input_event);
1201     // Hit-test for all the pressed touch points. If there is a touch-handler
1202     // for any of the touch points, then the renderer should continue to receive
1203     // touch events.
1204     ack_result = INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1205     for (size_t i = 0; i < touch_event.touchesLength; ++i) {
1206       if (touch_event.touches[i].state == WebTouchPoint::StatePressed &&
1207           HasTouchEventHandlersAt(
1208               gfx::ToFlooredPoint(touch_event.touches[i].position))) {
1209         ack_result = INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1210         break;
1211       }
1212     }
1213   }
1214
1215   // Send mouse wheel events and their disposition to the compositor thread, so
1216   // that they can be used to produce the elastic overscroll effect on Mac.
1217   if (input_event->type == WebInputEvent::MouseWheel) {
1218     ObserveWheelEventAndResult(
1219         static_cast<const WebMouseWheelEvent&>(*input_event),
1220         event_overscroll ? event_overscroll->latest_overscroll_delta
1221                          : gfx::Vector2dF(),
1222         processed);
1223   }
1224
1225   bool frame_pending = compositor_ && compositor_->BeginMainFrameRequested();
1226
1227   // If we don't have a fast and accurate Now(), we assume the input handlers
1228   // are heavy and rate limit them.
1229   bool rate_limiting_wanted =
1230       input_event->type == WebInputEvent::MouseMove ||
1231       input_event->type == WebInputEvent::MouseWheel;
1232   if (rate_limiting_wanted && !start_time.is_null()) {
1233       base::TimeTicks end_time = base::TimeTicks::Now();
1234       total_input_handling_time_this_frame_ += (end_time - start_time);
1235       rate_limiting_wanted =
1236           total_input_handling_time_this_frame_.InMicroseconds() >
1237           kInputHandlingTimeThrottlingThresholdMicroseconds;
1238   }
1239
1240   TRACE_EVENT_SYNTHETIC_DELAY_END("blink.HandleInputEvent");
1241
1242   // Note that we can't use handling_event_type_ here since it will be overriden
1243   // by reentrant calls for events after the paused one.
1244   bool no_ack = ignore_ack_for_mouse_move_from_debugger_ &&
1245       input_event->type == WebInputEvent::MouseMove;
1246   if (WebInputEventTraits::WillReceiveAckFromRenderer(*input_event) &&
1247       !no_ack) {
1248     InputEventAck ack(input_event->type, ack_result, swap_latency_info,
1249                       event_overscroll.Pass(),
1250                       WebInputEventTraits::GetUniqueTouchEventId(*input_event));
1251     scoped_ptr<IPC::Message> response(
1252         new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
1253     if (rate_limiting_wanted && frame_pending && !is_hidden_) {
1254       // We want to rate limit the input events in this case, so we'll wait for
1255       // painting to finish before ACKing this message.
1256       TRACE_EVENT_INSTANT0("renderer",
1257         "RenderWidget::OnHandleInputEvent ack throttled",
1258         TRACE_EVENT_SCOPE_THREAD);
1259       if (pending_input_event_ack_) {
1260         TRACE_EVENT_ASYNC_END0("input", "RenderWidget::ThrottledInputEventAck",
1261                                pending_input_event_ack_.get());
1262         // As two different kinds of events could cause us to postpone an ack
1263         // we send it now, if we have one pending. The Browser should never
1264         // send us the same kind of event we are delaying the ack for.
1265         Send(pending_input_event_ack_.release());
1266       }
1267       pending_input_event_ack_ = response.Pass();
1268       TRACE_EVENT_ASYNC_BEGIN0("input", "RenderWidget::ThrottledInputEventAck",
1269                                pending_input_event_ack_.get());
1270       if (compositor_)
1271         compositor_->NotifyInputThrottledUntilCommit();
1272     } else {
1273       Send(response.release());
1274     }
1275   } else {
1276     DCHECK(!event_overscroll) << "Unexpected overscroll for un-acked event";
1277   }
1278   if (!no_ack && RenderThreadImpl::current()) {
1279     RenderThreadImpl::current()
1280         ->GetRendererScheduler()
1281         ->DidHandleInputEventOnMainThread(*input_event);
1282   }
1283   if (input_event->type == WebInputEvent::MouseMove)
1284     ignore_ack_for_mouse_move_from_debugger_ = false;
1285
1286 #if defined(OS_ANDROID)
1287   // Allow the IME to be shown when the focus changes as a consequence
1288   // of a processed touch end event.
1289   if (input_event->type == WebInputEvent::TouchEnd && processed)
1290     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
1291 #elif defined(USE_AURA)
1292   // Show the virtual keyboard if enabled and a user gesture triggers a focus
1293   // change.
1294   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
1295                     input_event->type == WebInputEvent::MouseUp)) {
1296     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_IME);
1297   }
1298 #endif
1299
1300   if (!prevent_default) {
1301     if (WebInputEvent::isKeyboardEventType(input_event->type))
1302       DidHandleKeyEvent();
1303   }
1304
1305 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
1306 // virtual keyboard.
1307 #if !defined(OS_ANDROID)
1308   // Virtual keyboard is not supported, so react to focus change immediately.
1309   if (processed && (input_event->type == WebInputEvent::TouchEnd ||
1310                     input_event->type == WebInputEvent::MouseUp)) {
1311     FocusChangeComplete();
1312   }
1313 #endif
1314 }
1315
1316 void RenderWidget::OnCursorVisibilityChange(bool is_visible) {
1317   if (webwidget_)
1318     webwidget_->setCursorVisibilityState(is_visible);
1319 }
1320
1321 void RenderWidget::OnMouseCaptureLost() {
1322   if (webwidget_)
1323     webwidget_->mouseCaptureLost();
1324 }
1325
1326 void RenderWidget::OnSetFocus(bool enable) {
1327   has_focus_ = enable;
1328   if (webwidget_)
1329     webwidget_->setFocus(enable);
1330 }
1331
1332 void RenderWidget::ClearFocus() {
1333   // We may have got the focus from the browser before this gets processed, in
1334   // which case we do not want to unfocus ourself.
1335   if (!has_focus_ && webwidget_)
1336     webwidget_->setFocus(false);
1337 }
1338
1339 void RenderWidget::FlushPendingInputEventAck() {
1340   if (pending_input_event_ack_) {
1341     TRACE_EVENT_ASYNC_END0("input", "RenderWidget::ThrottledInputEventAck",
1342                            pending_input_event_ack_.get());
1343     Send(pending_input_event_ack_.release());
1344   }
1345   total_input_handling_time_this_frame_ = base::TimeDelta();
1346 }
1347
1348 ///////////////////////////////////////////////////////////////////////////////
1349 // WebWidgetClient
1350
1351 void RenderWidget::didAutoResize(const WebSize& new_size) {
1352   if (size_.width() != new_size.width || size_.height() != new_size.height) {
1353     size_ = new_size;
1354
1355     if (resizing_mode_selector_->is_synchronous_mode()) {
1356       WebRect new_pos(rootWindowRect().x,
1357                       rootWindowRect().y,
1358                       new_size.width,
1359                       new_size.height);
1360       view_screen_rect_ = new_pos;
1361       window_screen_rect_ = new_pos;
1362     }
1363
1364     AutoResizeCompositor();
1365
1366     if (!resizing_mode_selector_->is_synchronous_mode())
1367       need_update_rect_for_auto_resize_ = true;
1368   }
1369 }
1370
1371 void RenderWidget::AutoResizeCompositor()  {
1372   physical_backing_size_ = gfx::ToCeiledSize(gfx::ScaleSize(size_,
1373       device_scale_factor_));
1374   if (compositor_)
1375     compositor_->setViewportSize(size_, physical_backing_size_);
1376 }
1377
1378 void RenderWidget::initializeLayerTreeView() {
1379   DCHECK(!host_closing_);
1380
1381   compositor_ = RenderWidgetCompositor::Create(this, compositor_deps_);
1382   compositor_->setViewportSize(size_, physical_backing_size_);
1383   if (init_complete_)
1384     StartCompositor();
1385 }
1386
1387 void RenderWidget::WillCloseLayerTreeView() {
1388   if (host_closing_)
1389     return;
1390
1391   // Prevent new compositors or output surfaces from being created.
1392   host_closing_ = true;
1393
1394   // Always send this notification to prevent new layer tree views from
1395   // being created, even if one hasn't been created yet.
1396   if (webwidget_)
1397     webwidget_->willCloseLayerTreeView();
1398 }
1399
1400 blink::WebLayerTreeView* RenderWidget::layerTreeView() {
1401   return compositor_.get();
1402 }
1403
1404 void RenderWidget::WillBeginCompositorFrame() {
1405   TRACE_EVENT0("gpu", "RenderWidget::willBeginCompositorFrame");
1406
1407   // The following two can result in further layout and possibly
1408   // enable GPU acceleration so they need to be called before any painting
1409   // is done.
1410   UpdateTextInputType();
1411 #if defined(OS_ANDROID)
1412   UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
1413 #endif
1414   UpdateSelectionBounds();
1415 }
1416
1417 void RenderWidget::DidCommitCompositorFrame() {
1418   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_,
1419                     DidCommitCompositorFrame());
1420   FOR_EACH_OBSERVER(RenderFrameProxy, render_frame_proxies_,
1421                     DidCommitCompositorFrame());
1422 #if defined(VIDEO_HOLE)
1423   FOR_EACH_OBSERVER(RenderFrameImpl, video_hole_frames_,
1424                     DidCommitCompositorFrame());
1425 #endif  // defined(VIDEO_HOLE)
1426   FlushPendingInputEventAck();
1427 }
1428
1429 void RenderWidget::DidCommitAndDrawCompositorFrame() {
1430   // NOTE: Tests may break if this event is renamed or moved. See
1431   // tab_capture_performancetest.cc.
1432   TRACE_EVENT0("gpu", "RenderWidget::DidCommitAndDrawCompositorFrame");
1433   // Notify subclasses that we initiated the paint operation.
1434   DidInitiatePaint();
1435 }
1436
1437 void RenderWidget::DidCompleteSwapBuffers() {
1438   TRACE_EVENT0("renderer", "RenderWidget::DidCompleteSwapBuffers");
1439
1440   // Notify subclasses threaded composited rendering was flushed to the screen.
1441   DidFlushPaint();
1442
1443   if (!next_paint_flags_ &&
1444       !need_update_rect_for_auto_resize_ &&
1445       !plugin_window_moves_.size()) {
1446     return;
1447   }
1448
1449   ViewHostMsg_UpdateRect_Params params;
1450   params.view_size = size_;
1451   params.plugin_window_moves.swap(plugin_window_moves_);
1452   params.flags = next_paint_flags_;
1453
1454   Send(new ViewHostMsg_UpdateRect(routing_id_, params));
1455   next_paint_flags_ = 0;
1456   need_update_rect_for_auto_resize_ = false;
1457 }
1458
1459 void RenderWidget::ScheduleComposite() {
1460   if (compositor_ &&
1461       compositor_deps_->GetCompositorImplThreadTaskRunner().get()) {
1462     compositor_->setNeedsAnimate();
1463   }
1464 }
1465
1466 void RenderWidget::ScheduleCompositeWithForcedRedraw() {
1467   if (compositor_) {
1468     // Regardless of whether threaded compositing is enabled, always
1469     // use this mechanism to force the compositor to redraw. However,
1470     // the invalidation code path below is still needed for the
1471     // non-threaded case.
1472     compositor_->SetNeedsForcedRedraw();
1473   }
1474   ScheduleComposite();
1475 }
1476
1477 // static
1478 scoped_ptr<cc::SwapPromise> RenderWidget::QueueMessageImpl(
1479     IPC::Message* msg,
1480     MessageDeliveryPolicy policy,
1481     FrameSwapMessageQueue* frame_swap_message_queue,
1482     scoped_refptr<IPC::SyncMessageFilter> sync_message_filter,
1483     int source_frame_number) {
1484   bool first_message_for_frame = false;
1485   frame_swap_message_queue->QueueMessageForFrame(policy,
1486                                                  source_frame_number,
1487                                                  make_scoped_ptr(msg),
1488                                                  &first_message_for_frame);
1489   if (first_message_for_frame) {
1490     scoped_ptr<cc::SwapPromise> promise(new QueueMessageSwapPromise(
1491         sync_message_filter, frame_swap_message_queue, source_frame_number));
1492     return promise;
1493   }
1494   return nullptr;
1495 }
1496
1497 void RenderWidget::QueueMessage(IPC::Message* msg,
1498                                 MessageDeliveryPolicy policy) {
1499   // RenderThreadImpl::current() is NULL in some tests.
1500   if (!compositor_ || !RenderThreadImpl::current()) {
1501     Send(msg);
1502     return;
1503   }
1504
1505   scoped_ptr<cc::SwapPromise> swap_promise =
1506       QueueMessageImpl(msg,
1507                        policy,
1508                        frame_swap_message_queue_.get(),
1509                        RenderThreadImpl::current()->sync_message_filter(),
1510                        compositor_->GetSourceFrameNumber());
1511
1512   if (swap_promise) {
1513     compositor_->QueueSwapPromise(swap_promise.Pass());
1514     // Request a commit. This might either A) request a commit ahead of time
1515     // or B) request a commit which is not needed because there are not
1516     // pending updates. If B) then the commit will be skipped and the swap
1517     // promises will be broken (see EarlyOut_NoUpdates). To achieve that we
1518     // call SetNeedsUpdateLayers instead of SetNeedsCommit so that
1519     // can_cancel_commit is not unset.
1520     compositor_->SetNeedsUpdateLayers();
1521   }
1522 }
1523
1524 void RenderWidget::didChangeCursor(const WebCursorInfo& cursor_info) {
1525   // TODO(darin): Eliminate this temporary.
1526   WebCursor cursor;
1527   InitializeCursorFromWebKitCursorInfo(&cursor, cursor_info);
1528   // Only send a SetCursor message if we need to make a change.
1529   if (!current_cursor_.IsEqual(cursor)) {
1530     current_cursor_ = cursor;
1531     Send(new ViewHostMsg_SetCursor(routing_id_, cursor));
1532   }
1533 }
1534
1535 // We are supposed to get a single call to Show for a newly created RenderWidget
1536 // that was created via RenderWidget::CreateWebView.  So, we wait until this
1537 // point to dispatch the ShowWidget message.
1538 //
1539 // This method provides us with the information about how to display the newly
1540 // created RenderWidget (i.e., as a blocked popup or as a new tab).
1541 //
1542 void RenderWidget::show(WebNavigationPolicy) {
1543   DCHECK(!did_show_) << "received extraneous Show call";
1544   DCHECK(routing_id_ != MSG_ROUTING_NONE);
1545   DCHECK(opener_id_ != MSG_ROUTING_NONE);
1546
1547   if (did_show_)
1548     return;
1549
1550   did_show_ = true;
1551   // NOTE: initial_rect_ may still have its default values at this point, but
1552   // that's okay.  It'll be ignored if as_popup is false, or the browser
1553   // process will impose a default position otherwise.
1554   Send(new ViewHostMsg_ShowWidget(opener_id_, routing_id_, initial_rect_));
1555   SetPendingWindowRect(initial_rect_);
1556 }
1557
1558 void RenderWidget::didFocus() {
1559 }
1560
1561 void RenderWidget::didBlur() {
1562 }
1563
1564 void RenderWidget::DoDeferredClose() {
1565   WillCloseLayerTreeView();
1566   Send(new ViewHostMsg_Close(routing_id_));
1567 }
1568
1569 void RenderWidget::NotifyOnClose() {
1570   FOR_EACH_OBSERVER(RenderFrameImpl, render_frames_, WidgetWillClose());
1571 }
1572
1573 void RenderWidget::closeWidgetSoon() {
1574   DCHECK(content::RenderThread::Get());
1575   if (is_swapped_out_) {
1576     // This widget is currently swapped out, and the active widget is in a
1577     // different process.  Have the browser route the close request to the
1578     // active widget instead, so that the correct unload handlers are run.
1579     Send(new ViewHostMsg_RouteCloseEvent(routing_id_));
1580     return;
1581   }
1582
1583   // If a page calls window.close() twice, we'll end up here twice, but that's
1584   // OK.  It is safe to send multiple Close messages.
1585
1586   // Ask the RenderWidgetHost to initiate close.  We could be called from deep
1587   // in Javascript.  If we ask the RendwerWidgetHost to close now, the window
1588   // could be closed before the JS finishes executing.  So instead, post a
1589   // message back to the message loop, which won't run until the JS is
1590   // complete, and then the Close message can be sent.
1591   base::ThreadTaskRunnerHandle::Get()->PostTask(
1592       FROM_HERE, base::Bind(&RenderWidget::DoDeferredClose, this));
1593 }
1594
1595 void RenderWidget::QueueSyntheticGesture(
1596     scoped_ptr<SyntheticGestureParams> gesture_params,
1597     const SyntheticGestureCompletionCallback& callback) {
1598   DCHECK(!callback.is_null());
1599
1600   pending_synthetic_gesture_callbacks_.push(callback);
1601
1602   SyntheticGesturePacket gesture_packet;
1603   gesture_packet.set_gesture_params(gesture_params.Pass());
1604
1605   Send(new InputHostMsg_QueueSyntheticGesture(routing_id_, gesture_packet));
1606 }
1607
1608 void RenderWidget::Close() {
1609   screen_metrics_emulator_.reset();
1610   WillCloseLayerTreeView();
1611   compositor_.reset();
1612   if (webwidget_) {
1613     webwidget_->close();
1614     webwidget_ = NULL;
1615   }
1616 }
1617
1618 WebRect RenderWidget::windowRect() {
1619   if (pending_window_rect_count_)
1620     return pending_window_rect_;
1621
1622   return view_screen_rect_;
1623 }
1624
1625 void RenderWidget::setToolTipText(const blink::WebString& text,
1626                                   WebTextDirection hint) {
1627   Send(new ViewHostMsg_SetTooltipText(routing_id_, text, hint));
1628 }
1629
1630 void RenderWidget::setWindowRect(const WebRect& rect) {
1631   WebRect window_rect = rect;
1632   if (popup_origin_scale_for_emulation_) {
1633     float scale = popup_origin_scale_for_emulation_;
1634     window_rect.x = popup_screen_origin_for_emulation_.x() +
1635         (window_rect.x - popup_view_origin_for_emulation_.x()) * scale;
1636     window_rect.y = popup_screen_origin_for_emulation_.y() +
1637         (window_rect.y - popup_view_origin_for_emulation_.y()) * scale;
1638   }
1639
1640   if (!resizing_mode_selector_->is_synchronous_mode()) {
1641     if (did_show_) {
1642       Send(new ViewHostMsg_RequestMove(routing_id_, window_rect));
1643       SetPendingWindowRect(window_rect);
1644     } else {
1645       initial_rect_ = window_rect;
1646     }
1647   } else {
1648     SetWindowRectSynchronously(window_rect);
1649   }
1650 }
1651
1652 void RenderWidget::SetPendingWindowRect(const WebRect& rect) {
1653   pending_window_rect_ = rect;
1654   pending_window_rect_count_++;
1655 }
1656
1657 WebRect RenderWidget::rootWindowRect() {
1658   if (pending_window_rect_count_) {
1659     // NOTE(mbelshe): If there is a pending_window_rect_, then getting
1660     // the RootWindowRect is probably going to return wrong results since the
1661     // browser may not have processed the Move yet.  There isn't really anything
1662     // good to do in this case, and it shouldn't happen - since this size is
1663     // only really needed for windowToScreen, which is only used for Popups.
1664     return pending_window_rect_;
1665   }
1666
1667   return window_screen_rect_;
1668 }
1669
1670 WebRect RenderWidget::windowResizerRect() {
1671   return resizer_rect_;
1672 }
1673
1674 void RenderWidget::OnImeSetComposition(
1675     const base::string16& text,
1676     const std::vector<WebCompositionUnderline>& underlines,
1677     int selection_start, int selection_end) {
1678   if (!ShouldHandleImeEvent())
1679     return;
1680   ImeEventGuard guard(this);
1681   base::AutoReset<bool> handling_input_event_resetter(&handling_input_event_,
1682                                                       true);
1683   if (!webwidget_->setComposition(
1684       text, WebVector<WebCompositionUnderline>(underlines),
1685       selection_start, selection_end)) {
1686     // If we failed to set the composition text, then we need to let the browser
1687     // process to cancel the input method's ongoing composition session, to make
1688     // sure we are in a consistent state.
1689     Send(new InputHostMsg_ImeCancelComposition(routing_id()));
1690   }
1691   UpdateCompositionInfo(true);
1692 }
1693
1694 void RenderWidget::OnImeConfirmComposition(const base::string16& text,
1695                                            const gfx::Range& replacement_range,
1696                                            bool keep_selection) {
1697   if (!ShouldHandleImeEvent())
1698     return;
1699   ImeEventGuard guard(this);
1700   handling_input_event_ = true;
1701   if (text.length())
1702     webwidget_->confirmComposition(text);
1703   else if (keep_selection)
1704     webwidget_->confirmComposition(WebWidget::KeepSelection);
1705   else
1706     webwidget_->confirmComposition(WebWidget::DoNotKeepSelection);
1707   handling_input_event_ = false;
1708   UpdateCompositionInfo(true);
1709 }
1710
1711 void RenderWidget::OnRepaint(gfx::Size size_to_paint) {
1712   // During shutdown we can just ignore this message.
1713   if (!webwidget_)
1714     return;
1715
1716   // Even if the browser provides an empty damage rect, it's still expecting to
1717   // receive a repaint ack so just damage the entire widget bounds.
1718   if (size_to_paint.IsEmpty()) {
1719     size_to_paint = size_;
1720   }
1721
1722   set_next_paint_is_repaint_ack();
1723   if (compositor_)
1724     compositor_->SetNeedsRedrawRect(gfx::Rect(size_to_paint));
1725 }
1726
1727 void RenderWidget::OnSyntheticGestureCompleted() {
1728   DCHECK(!pending_synthetic_gesture_callbacks_.empty());
1729
1730   pending_synthetic_gesture_callbacks_.front().Run();
1731   pending_synthetic_gesture_callbacks_.pop();
1732 }
1733
1734 void RenderWidget::OnSetTextDirection(WebTextDirection direction) {
1735   if (!webwidget_)
1736     return;
1737   webwidget_->setTextDirection(direction);
1738 }
1739
1740 void RenderWidget::OnUpdateScreenRects(const gfx::Rect& view_screen_rect,
1741                                        const gfx::Rect& window_screen_rect) {
1742   if (screen_metrics_emulator_) {
1743     screen_metrics_emulator_->OnUpdateScreenRectsMessage(
1744         view_screen_rect, window_screen_rect);
1745   } else {
1746     view_screen_rect_ = view_screen_rect;
1747     window_screen_rect_ = window_screen_rect;
1748   }
1749   Send(new ViewHostMsg_UpdateScreenRects_ACK(routing_id()));
1750 }
1751
1752 void RenderWidget::OnSetSurfaceIdNamespace(uint32_t surface_id_namespace) {
1753   if (compositor_)
1754     compositor_->SetSurfaceIdNamespace(surface_id_namespace);
1755 }
1756
1757 void RenderWidget::showImeIfNeeded() {
1758   OnShowImeIfNeeded();
1759 }
1760
1761 void RenderWidget::OnShowImeIfNeeded() {
1762 #if defined(OS_ANDROID) || defined(USE_AURA)
1763   UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
1764 #endif
1765
1766 // TODO(rouslan): Fix ChromeOS and Windows 8 behavior of autofill popup with
1767 // virtual keyboard.
1768 #if !defined(OS_ANDROID)
1769   FocusChangeComplete();
1770 #endif
1771 }
1772
1773 #if defined(OS_ANDROID)
1774 void RenderWidget::IncrementOutstandingImeEventAcks() {
1775   ++outstanding_ime_acks_;
1776 }
1777
1778 void RenderWidget::OnImeEventAck() {
1779   --outstanding_ime_acks_;
1780   DCHECK(outstanding_ime_acks_ >= 0);
1781 }
1782 #endif
1783
1784 bool RenderWidget::ShouldHandleImeEvent() {
1785 #if defined(OS_ANDROID)
1786   return !!webwidget_ && outstanding_ime_acks_ == 0;
1787 #else
1788   return !!webwidget_;
1789 #endif
1790 }
1791
1792 bool RenderWidget::SendAckForMouseMoveFromDebugger() {
1793   if (handling_event_type_ == WebInputEvent::MouseMove) {
1794     // If we pause multiple times during a single mouse move event, we should
1795     // only send ACK once.
1796     if (!ignore_ack_for_mouse_move_from_debugger_) {
1797       InputEventAck ack(handling_event_type_, INPUT_EVENT_ACK_STATE_CONSUMED);
1798       Send(new InputHostMsg_HandleInputEvent_ACK(routing_id_, ack));
1799       return true;
1800     }
1801   }
1802   return false;
1803 }
1804
1805 void RenderWidget::IgnoreAckForMouseMoveFromDebugger() {
1806   ignore_ack_for_mouse_move_from_debugger_ = true;
1807 }
1808
1809 void RenderWidget::SetDeviceScaleFactor(float device_scale_factor) {
1810   if (device_scale_factor_ == device_scale_factor)
1811     return;
1812
1813   device_scale_factor_ = device_scale_factor;
1814   ScheduleComposite();
1815 }
1816
1817 bool RenderWidget::SetDeviceColorProfile(
1818     const std::vector<char>& color_profile) {
1819   if (device_color_profile_ == color_profile)
1820     return false;
1821
1822   device_color_profile_ = color_profile;
1823   return true;
1824 }
1825
1826 void RenderWidget::ResetDeviceColorProfileForTesting() {
1827   if (!device_color_profile_.empty())
1828     device_color_profile_.clear();
1829   device_color_profile_.push_back('0');
1830 }
1831
1832 void RenderWidget::OnOrientationChange() {
1833 }
1834
1835 gfx::Vector2d RenderWidget::GetScrollOffset() {
1836   // Bare RenderWidgets don't support scroll offset.
1837   return gfx::Vector2d();
1838 }
1839
1840 void RenderWidget::SetHidden(bool hidden) {
1841   if (is_hidden_ == hidden)
1842     return;
1843
1844   // The status has changed.  Tell the RenderThread about it and ensure
1845   // throttled acks are released in case frame production ceases.
1846   is_hidden_ = hidden;
1847   FlushPendingInputEventAck();
1848
1849   if (is_hidden_)
1850     RenderThreadImpl::current()->WidgetHidden();
1851   else
1852     RenderThreadImpl::current()->WidgetRestored();
1853 }
1854
1855 void RenderWidget::DidToggleFullscreen() {
1856   if (!webwidget_)
1857     return;
1858
1859   if (is_fullscreen_granted_) {
1860     webwidget_->didEnterFullScreen();
1861   } else {
1862     webwidget_->didExitFullScreen();
1863   }
1864 }
1865
1866 bool RenderWidget::next_paint_is_resize_ack() const {
1867   return ViewHostMsg_UpdateRect_Flags::is_resize_ack(next_paint_flags_);
1868 }
1869
1870 void RenderWidget::set_next_paint_is_resize_ack() {
1871   next_paint_flags_ |= ViewHostMsg_UpdateRect_Flags::IS_RESIZE_ACK;
1872 }
1873
1874 void RenderWidget::set_next_paint_is_repaint_ack() {
1875   next_paint_flags_ |= ViewHostMsg_UpdateRect_Flags::IS_REPAINT_ACK;
1876 }
1877
1878 static bool IsDateTimeInput(ui::TextInputType type) {
1879   return type == ui::TEXT_INPUT_TYPE_DATE ||
1880       type == ui::TEXT_INPUT_TYPE_DATE_TIME ||
1881       type == ui::TEXT_INPUT_TYPE_DATE_TIME_LOCAL ||
1882       type == ui::TEXT_INPUT_TYPE_MONTH ||
1883       type == ui::TEXT_INPUT_TYPE_TIME ||
1884       type == ui::TEXT_INPUT_TYPE_WEEK;
1885 }
1886
1887
1888 void RenderWidget::StartHandlingImeEvent() {
1889   DCHECK(!handling_ime_event_);
1890   handling_ime_event_ = true;
1891 }
1892
1893 void RenderWidget::FinishHandlingImeEvent() {
1894   DCHECK(handling_ime_event_);
1895   handling_ime_event_ = false;
1896   // While handling an ime event, text input state and selection bounds updates
1897   // are ignored. These must explicitly be updated once finished handling the
1898   // ime event.
1899   UpdateSelectionBounds();
1900 #if defined(OS_ANDROID)
1901   UpdateTextInputState(NO_SHOW_IME, FROM_IME);
1902 #endif
1903 }
1904
1905 void RenderWidget::UpdateTextInputType() {
1906   TRACE_EVENT0("renderer", "RenderWidget::UpdateTextInputType");
1907   ui::TextInputType new_type = GetTextInputType();
1908   if (IsDateTimeInput(new_type))
1909     return;  // Not considered as a text input field in WebKit/Chromium.
1910
1911   bool new_can_compose_inline = CanComposeInline();
1912
1913   blink::WebTextInputInfo new_info;
1914   if (webwidget_)
1915     new_info = webwidget_->textInputInfo();
1916   const ui::TextInputMode new_mode = ConvertInputMode(new_info.inputMode);
1917   int new_flags = new_info.flags;
1918
1919   if (text_input_type_ != new_type
1920       || can_compose_inline_ != new_can_compose_inline
1921       || text_input_mode_ != new_mode
1922       || text_input_flags_ != new_flags) {
1923     Send(new ViewHostMsg_TextInputTypeChanged(routing_id(),
1924                                               new_type,
1925                                               new_mode,
1926                                               new_can_compose_inline,
1927                                               new_flags));
1928     text_input_type_ = new_type;
1929     can_compose_inline_ = new_can_compose_inline;
1930     text_input_mode_ = new_mode;
1931     text_input_flags_ = new_flags;
1932   }
1933 }
1934
1935 #if defined(OS_ANDROID) || defined(USE_AURA)
1936 void RenderWidget::UpdateTextInputState(ShowIme show_ime,
1937                                         ChangeSource change_source) {
1938   TRACE_EVENT0("renderer", "RenderWidget::UpdateTextInputState");
1939   if (handling_ime_event_)
1940     return;
1941   ui::TextInputType new_type = GetTextInputType();
1942   if (IsDateTimeInput(new_type))
1943     return;  // Not considered as a text input field in WebKit/Chromium.
1944
1945   blink::WebTextInputInfo new_info;
1946   if (webwidget_)
1947     new_info = webwidget_->textInputInfo();
1948
1949   bool new_can_compose_inline = CanComposeInline();
1950
1951   // Only sends text input params if they are changed or if the ime should be
1952   // shown.
1953   if (show_ime == SHOW_IME_IF_NEEDED ||
1954       (text_input_type_ != new_type ||
1955        text_input_info_ != new_info ||
1956        can_compose_inline_ != new_can_compose_inline)
1957 #if defined(OS_ANDROID)
1958       || text_field_is_dirty_
1959 #endif
1960       ) {
1961     ViewHostMsg_TextInputState_Params p;
1962     p.type = new_type;
1963     p.flags = new_info.flags;
1964     p.value = new_info.value.utf8();
1965     p.selection_start = new_info.selectionStart;
1966     p.selection_end = new_info.selectionEnd;
1967     p.composition_start = new_info.compositionStart;
1968     p.composition_end = new_info.compositionEnd;
1969     p.can_compose_inline = new_can_compose_inline;
1970     p.show_ime_if_needed = (show_ime == SHOW_IME_IF_NEEDED);
1971 #if defined(USE_AURA)
1972     p.is_non_ime_change = true;
1973 #endif
1974 #if defined(OS_ANDROID)
1975     p.is_non_ime_change = (change_source == FROM_NON_IME) ||
1976                          text_field_is_dirty_;
1977     if (p.is_non_ime_change)
1978       IncrementOutstandingImeEventAcks();
1979     text_field_is_dirty_ = false;
1980 #endif
1981 #if defined(USE_AURA)
1982     Send(new ViewHostMsg_TextInputTypeChanged(routing_id(),
1983                                               new_type,
1984                                               text_input_mode_,
1985                                               new_can_compose_inline,
1986                                               new_info.flags));
1987 #endif
1988     Send(new ViewHostMsg_TextInputStateChanged(routing_id(), p));
1989
1990     text_input_info_ = new_info;
1991     text_input_type_ = new_type;
1992     can_compose_inline_ = new_can_compose_inline;
1993     text_input_flags_ = new_info.flags;
1994   }
1995 }
1996 #endif
1997
1998 void RenderWidget::GetSelectionBounds(gfx::Rect* focus, gfx::Rect* anchor) {
1999   WebRect focus_webrect;
2000   WebRect anchor_webrect;
2001   webwidget_->selectionBounds(focus_webrect, anchor_webrect);
2002   *focus = focus_webrect;
2003   *anchor = anchor_webrect;
2004 }
2005
2006 void RenderWidget::UpdateSelectionBounds() {
2007   TRACE_EVENT0("renderer", "RenderWidget::UpdateSelectionBounds");
2008   if (!webwidget_)
2009     return;
2010   if (handling_ime_event_)
2011     return;
2012
2013   // With composited selection updates, the selection bounds will be reported
2014   // directly by the compositor, in which case explicit IPC selection
2015   // notifications should be suppressed.
2016   if (!blink::WebRuntimeFeatures::isCompositedSelectionUpdateEnabled()) {
2017     ViewHostMsg_SelectionBounds_Params params;
2018     GetSelectionBounds(&params.anchor_rect, &params.focus_rect);
2019     if (selection_anchor_rect_ != params.anchor_rect ||
2020         selection_focus_rect_ != params.focus_rect) {
2021       selection_anchor_rect_ = params.anchor_rect;
2022       selection_focus_rect_ = params.focus_rect;
2023       webwidget_->selectionTextDirection(params.focus_dir, params.anchor_dir);
2024       params.is_anchor_first = webwidget_->isSelectionAnchorFirst();
2025       Send(new ViewHostMsg_SelectionBoundsChanged(routing_id_, params));
2026     }
2027   }
2028
2029   UpdateCompositionInfo(false);
2030 }
2031
2032 // Check blink::WebTextInputType and ui::TextInputType is kept in sync.
2033 #define STATIC_ASSERT_WTIT_ENUM_MATCH(a, b)            \
2034     static_assert(int(blink::WebTextInputType##a)      \
2035                       == int(ui::TEXT_INPUT_TYPE_##b), \
2036                   "mismatching enums: " #a)
2037
2038 STATIC_ASSERT_WTIT_ENUM_MATCH(None,            NONE);
2039 STATIC_ASSERT_WTIT_ENUM_MATCH(Text,            TEXT);
2040 STATIC_ASSERT_WTIT_ENUM_MATCH(Password,        PASSWORD);
2041 STATIC_ASSERT_WTIT_ENUM_MATCH(Search,          SEARCH);
2042 STATIC_ASSERT_WTIT_ENUM_MATCH(Email,           EMAIL);
2043 STATIC_ASSERT_WTIT_ENUM_MATCH(Number,          NUMBER);
2044 STATIC_ASSERT_WTIT_ENUM_MATCH(Telephone,       TELEPHONE);
2045 STATIC_ASSERT_WTIT_ENUM_MATCH(URL,             URL);
2046 STATIC_ASSERT_WTIT_ENUM_MATCH(Date,            DATE);
2047 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTime,        DATE_TIME);
2048 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTimeLocal,   DATE_TIME_LOCAL);
2049 STATIC_ASSERT_WTIT_ENUM_MATCH(Month,           MONTH);
2050 STATIC_ASSERT_WTIT_ENUM_MATCH(Time,            TIME);
2051 STATIC_ASSERT_WTIT_ENUM_MATCH(Week,            WEEK);
2052 STATIC_ASSERT_WTIT_ENUM_MATCH(TextArea,        TEXT_AREA);
2053 STATIC_ASSERT_WTIT_ENUM_MATCH(ContentEditable, CONTENT_EDITABLE);
2054 STATIC_ASSERT_WTIT_ENUM_MATCH(DateTimeField,   DATE_TIME_FIELD);
2055
2056 ui::TextInputType RenderWidget::WebKitToUiTextInputType(
2057     blink::WebTextInputType type) {
2058   // Check the type is in the range representable by ui::TextInputType.
2059   DCHECK_LE(type, static_cast<int>(ui::TEXT_INPUT_TYPE_MAX)) <<
2060     "blink::WebTextInputType and ui::TextInputType not synchronized";
2061   return static_cast<ui::TextInputType>(type);
2062 }
2063
2064 ui::TextInputType RenderWidget::GetTextInputType() {
2065   if (webwidget_)
2066     return WebKitToUiTextInputType(webwidget_->textInputInfo().type);
2067   return ui::TEXT_INPUT_TYPE_NONE;
2068 }
2069
2070 void RenderWidget::UpdateCompositionInfo(bool should_update_range) {
2071 #if defined(OS_ANDROID)
2072   // TODO(yukawa): Start sending character bounds when the browser side
2073   // implementation becomes ready (crbug.com/424866).
2074 #else
2075   TRACE_EVENT0("renderer", "RenderWidget::UpdateCompositionInfo");
2076   gfx::Range range = gfx::Range();
2077   if (should_update_range) {
2078     GetCompositionRange(&range);
2079   } else {
2080     range = composition_range_;
2081   }
2082   std::vector<gfx::Rect> character_bounds;
2083   GetCompositionCharacterBounds(&character_bounds);
2084
2085   if (!ShouldUpdateCompositionInfo(range, character_bounds))
2086     return;
2087   composition_character_bounds_ = character_bounds;
2088   composition_range_ = range;
2089   Send(new InputHostMsg_ImeCompositionRangeChanged(
2090       routing_id(), composition_range_, composition_character_bounds_));
2091 #endif
2092 }
2093
2094 void RenderWidget::GetCompositionCharacterBounds(
2095     std::vector<gfx::Rect>* bounds) {
2096   DCHECK(bounds);
2097   bounds->clear();
2098 }
2099
2100 void RenderWidget::GetCompositionRange(gfx::Range* range) {
2101   size_t location, length;
2102   if (webwidget_->compositionRange(&location, &length)) {
2103     range->set_start(location);
2104     range->set_end(location + length);
2105   } else if (webwidget_->caretOrSelectionRange(&location, &length)) {
2106     range->set_start(location);
2107     range->set_end(location + length);
2108   } else {
2109     *range = gfx::Range::InvalidRange();
2110   }
2111 }
2112
2113 bool RenderWidget::ShouldUpdateCompositionInfo(
2114     const gfx::Range& range,
2115     const std::vector<gfx::Rect>& bounds) {
2116   if (composition_range_ != range)
2117     return true;
2118   if (bounds.size() != composition_character_bounds_.size())
2119     return true;
2120   for (size_t i = 0; i < bounds.size(); ++i) {
2121     if (bounds[i] != composition_character_bounds_[i])
2122       return true;
2123   }
2124   return false;
2125 }
2126
2127 #if defined(OS_ANDROID)
2128 void RenderWidget::DidChangeBodyBackgroundColor(SkColor bg_color) {
2129   // If not initialized, default to white. Note that 0 is different from black
2130   // as black still has alpha 0xFF.
2131   if (!bg_color)
2132     bg_color = SK_ColorWHITE;
2133
2134   if (bg_color != body_background_color_) {
2135     body_background_color_ = bg_color;
2136     Send(new ViewHostMsg_DidChangeBodyBackgroundColor(routing_id(), bg_color));
2137   }
2138 }
2139
2140 bool RenderWidget::DoesRecordFullLayer() const {
2141   SynchronousCompositorFactory* synchronous_compositor_factory =
2142       SynchronousCompositorFactory::GetInstance();
2143
2144   // We assume that the absence of synchronous_compositor_factory
2145   // means we are in Chrome. In chrome, we want to clip, i.e.
2146   // *not* to record the full layer.
2147   if (!synchronous_compositor_factory)
2148     return false;
2149
2150   return synchronous_compositor_factory->RecordFullLayer();
2151 }
2152 #endif
2153
2154 bool RenderWidget::CanComposeInline() {
2155   return true;
2156 }
2157
2158 WebScreenInfo RenderWidget::screenInfo() {
2159   return screen_info_;
2160 }
2161
2162 float RenderWidget::deviceScaleFactor() {
2163   return device_scale_factor_;
2164 }
2165
2166 void RenderWidget::resetInputMethod() {
2167   ImeEventGuard guard(this);
2168   // If the last text input type is not None, then we should finish any
2169   // ongoing composition regardless of the new text input type.
2170   if (text_input_type_ != ui::TEXT_INPUT_TYPE_NONE) {
2171     // If a composition text exists, then we need to let the browser process
2172     // to cancel the input method's ongoing composition session.
2173     if (webwidget_->confirmComposition())
2174       Send(new InputHostMsg_ImeCancelComposition(routing_id()));
2175   }
2176
2177   UpdateCompositionInfo(true);
2178 }
2179
2180 #if defined(OS_ANDROID)
2181 void RenderWidget::showUnhandledTapUIIfNeeded(
2182     const WebPoint& tapped_position,
2183     const WebNode& tapped_node,
2184     bool page_changed) {
2185   DCHECK(handling_input_event_);
2186   bool should_trigger = !page_changed && tapped_node.isTextNode() &&
2187                         !tapped_node.isContentEditable() &&
2188                         !tapped_node.isInsideFocusableElementOrARIAWidget();
2189   if (should_trigger) {
2190     Send(new ViewHostMsg_ShowUnhandledTapUIIfNeeded(routing_id_,
2191         tapped_position.x, tapped_position.y));
2192   }
2193 }
2194 #endif
2195
2196 void RenderWidget::didHandleGestureEvent(
2197     const WebGestureEvent& event,
2198     bool event_cancelled) {
2199 #if defined(OS_ANDROID) || defined(USE_AURA)
2200   if (event_cancelled)
2201     return;
2202   if (event.type == WebInputEvent::GestureTap) {
2203     UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
2204   } else if (event.type == WebInputEvent::GestureLongPress) {
2205     DCHECK(webwidget_);
2206     if (webwidget_->textInputInfo().value.isEmpty())
2207       UpdateTextInputState(NO_SHOW_IME, FROM_NON_IME);
2208     else
2209       UpdateTextInputState(SHOW_IME_IF_NEEDED, FROM_NON_IME);
2210   }
2211 #endif
2212 }
2213
2214 void RenderWidget::didOverscroll(
2215     const blink::WebFloatSize& unusedDelta,
2216     const blink::WebFloatSize& accumulatedRootOverScroll,
2217     const blink::WebFloatPoint& position,
2218     const blink::WebFloatSize& velocity) {
2219   DidOverscrollParams params;
2220   params.accumulated_overscroll = gfx::Vector2dF(
2221       accumulatedRootOverScroll.width, accumulatedRootOverScroll.height);
2222   params.latest_overscroll_delta =
2223       gfx::Vector2dF(unusedDelta.width, unusedDelta.height);
2224   // TODO(sataya.m): don't negate velocity once http://crbug.com/499743 is
2225   // fixed.
2226   params.current_fling_velocity =
2227       gfx::Vector2dF(-velocity.width, -velocity.height);
2228   params.causal_event_viewport_point = gfx::PointF(position.x, position.y);
2229
2230   // If we're currently handling an event, stash the overscroll data such that
2231   // it can be bundled in the event ack.
2232   if (handling_event_overscroll_) {
2233     handling_event_overscroll_->reset(new DidOverscrollParams(params));
2234     return;
2235   }
2236
2237   Send(new InputHostMsg_DidOverscroll(routing_id_, params));
2238 }
2239
2240 void RenderWidget::StartCompositor() {
2241   // For widgets that are never visible, we don't need the compositor to run
2242   // at all.
2243   if (never_visible_)
2244     return;
2245   // In tests without a RenderThreadImpl, don't set ready as this kicks
2246   // off creating output surfaces that the test can't create.
2247   if (!RenderThreadImpl::current())
2248     return;
2249   compositor_->StartCompositor();
2250 }
2251
2252 void RenderWidget::SchedulePluginMove(const WebPluginGeometry& move) {
2253   size_t i = 0;
2254   for (; i < plugin_window_moves_.size(); ++i) {
2255     if (plugin_window_moves_[i].window == move.window) {
2256       if (move.rects_valid) {
2257         plugin_window_moves_[i] = move;
2258       } else {
2259         plugin_window_moves_[i].visible = move.visible;
2260       }
2261       break;
2262     }
2263   }
2264
2265   if (i == plugin_window_moves_.size())
2266     plugin_window_moves_.push_back(move);
2267 }
2268
2269 void RenderWidget::CleanupWindowInPluginMoves(gfx::PluginWindowHandle window) {
2270   for (WebPluginGeometryVector::iterator i = plugin_window_moves_.begin();
2271        i != plugin_window_moves_.end(); ++i) {
2272     if (i->window == window) {
2273       plugin_window_moves_.erase(i);
2274       break;
2275     }
2276   }
2277 }
2278
2279
2280 RenderWidgetCompositor* RenderWidget::compositor() const {
2281   return compositor_.get();
2282 }
2283
2284 bool RenderWidget::WillHandleMouseEvent(const blink::WebMouseEvent& event) {
2285   return false;
2286 }
2287
2288 bool RenderWidget::WillHandleGestureEvent(
2289     const blink::WebGestureEvent& event) {
2290   return false;
2291 }
2292
2293 void RenderWidget::ObserveWheelEventAndResult(
2294     const blink::WebMouseWheelEvent& wheel_event,
2295     const gfx::Vector2dF& wheel_unused_delta,
2296     bool event_processed) {
2297   if (!compositor_deps_->IsElasticOverscrollEnabled())
2298     return;
2299
2300   cc::InputHandlerScrollResult scroll_result;
2301   scroll_result.did_scroll = event_processed;
2302   scroll_result.did_overscroll_root = !wheel_unused_delta.IsZero();
2303   scroll_result.unused_scroll_delta = wheel_unused_delta;
2304
2305   RenderThreadImpl* render_thread = RenderThreadImpl::current();
2306   InputHandlerManager* input_handler_manager =
2307       render_thread ? render_thread->input_handler_manager() : NULL;
2308   if (input_handler_manager) {
2309     input_handler_manager->ObserveWheelEventAndResultOnMainThread(
2310         routing_id_, wheel_event, scroll_result);
2311   }
2312 }
2313
2314 void RenderWidget::hasTouchEventHandlers(bool has_handlers) {
2315   Send(new ViewHostMsg_HasTouchEventHandlers(routing_id_, has_handlers));
2316 }
2317
2318 // Check blink::WebTouchAction and  blink::WebTouchActionAuto is kept in sync
2319 #define STATIC_ASSERT_WTI_ENUM_MATCH(a, b)                                         \
2320     static_assert(int(blink::WebTouchAction##a) == int(TOUCH_ACTION_##b), \
2321                   "mismatching enums: " #a)
2322
2323 inline content::TouchAction& operator|=(content::TouchAction& a,
2324                                         content::TouchAction b) {
2325   a = static_cast<content::TouchAction>(static_cast<int>(a) |
2326                                         static_cast<int>(b));
2327   return a;
2328 }
2329
2330 void RenderWidget::setTouchAction(
2331     blink::WebTouchAction web_touch_action) {
2332
2333   // Ignore setTouchAction calls that result from synthetic touch events (eg.
2334   // when blink is emulating touch with mouse).
2335   if (handling_event_type_ != WebInputEvent::TouchStart)
2336     return;
2337
2338   // Verify the same values are used by the types so we can cast between them.
2339    STATIC_ASSERT_WTI_ENUM_MATCH(Auto,      AUTO);
2340    STATIC_ASSERT_WTI_ENUM_MATCH(None,      NONE);
2341    STATIC_ASSERT_WTI_ENUM_MATCH(PanLeft,   PAN_LEFT);
2342    STATIC_ASSERT_WTI_ENUM_MATCH(PanRight,  PAN_RIGHT);
2343    STATIC_ASSERT_WTI_ENUM_MATCH(PanX,      PAN_X);
2344    STATIC_ASSERT_WTI_ENUM_MATCH(PanUp,     PAN_UP);
2345    STATIC_ASSERT_WTI_ENUM_MATCH(PanDown,   PAN_DOWN);
2346    STATIC_ASSERT_WTI_ENUM_MATCH(PanY,      PAN_Y);
2347    STATIC_ASSERT_WTI_ENUM_MATCH(PinchZoom, PINCH_ZOOM);
2348
2349    content::TouchAction content_touch_action =
2350        static_cast<content::TouchAction>(web_touch_action);
2351   Send(new InputHostMsg_SetTouchAction(routing_id_, content_touch_action));
2352 }
2353
2354 void RenderWidget::didUpdateTextOfFocusedElementByNonUserInput() {
2355 #if defined(OS_ANDROID)
2356   text_field_is_dirty_ = true;
2357 #endif
2358 }
2359
2360 bool RenderWidget::HasTouchEventHandlersAt(const gfx::Point& point) const {
2361   return true;
2362 }
2363
2364 scoped_ptr<WebGraphicsContext3DCommandBufferImpl>
2365 RenderWidget::CreateGraphicsContext3D() {
2366   if (!webwidget_)
2367     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2368   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
2369           switches::kDisableGpuCompositing))
2370     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2371   if (!RenderThreadImpl::current())
2372     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2373   CauseForGpuLaunch cause =
2374       CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE;
2375   scoped_refptr<GpuChannelHost> gpu_channel_host(
2376       RenderThreadImpl::current()->EstablishGpuChannelSync(cause));
2377   if (!gpu_channel_host.get())
2378     return scoped_ptr<WebGraphicsContext3DCommandBufferImpl>();
2379
2380   // Explicitly disable antialiasing for the compositor. As of the time of
2381   // this writing, the only platform that supported antialiasing for the
2382   // compositor was Mac OS X, because the on-screen OpenGL context creation
2383   // code paths on Windows and Linux didn't yet have multisampling support.
2384   // Mac OS X essentially always behaves as though it's rendering offscreen.
2385   // Multisampling has a heavy cost especially on devices with relatively low
2386   // fill rate like most notebooks, and the Mac implementation would need to
2387   // be optimized to resolve directly into the IOSurface shared between the
2388   // GPU and browser processes. For these reasons and to avoid platform
2389   // disparities we explicitly disable antialiasing.
2390   blink::WebGraphicsContext3D::Attributes attributes;
2391   attributes.antialias = false;
2392   attributes.shareResources = true;
2393   attributes.noAutomaticFlushes = true;
2394   attributes.depth = false;
2395   attributes.stencil = false;
2396   bool lose_context_when_out_of_memory = true;
2397   WebGraphicsContext3DCommandBufferImpl::SharedMemoryLimits limits;
2398 #if defined(OS_ANDROID)
2399   // If we raster too fast we become upload bound, and pending
2400   // uploads consume memory. For maximum upload throughput, we would
2401   // want to allow for upload_throughput * pipeline_time of pending
2402   // uploads, after which we are just wasting memory. Since we don't
2403   // know our upload throughput yet, this just caps our memory usage.
2404   size_t divider = 1;
2405   if (base::SysInfo::IsLowEndDevice())
2406     divider = 6;
2407   // For reference Nexus10 can upload 1MB in about 2.5ms.
2408   const double max_mb_uploaded_per_ms = 2.0 / (5 * divider);
2409   // Deadline to draw a frame to achieve 60 frames per second.
2410   const size_t kMillisecondsPerFrame = 16;
2411   // Assuming a two frame deep pipeline between the CPU and the GPU.
2412   size_t max_transfer_buffer_usage_mb =
2413       static_cast<size_t>(2 * kMillisecondsPerFrame * max_mb_uploaded_per_ms);
2414   static const size_t kBytesPerMegabyte = 1024 * 1024;
2415   // We keep the MappedMemoryReclaimLimit the same as the upload limit
2416   // to avoid unnecessarily stalling the compositor thread.
2417   limits.mapped_memory_reclaim_limit =
2418       max_transfer_buffer_usage_mb * kBytesPerMegabyte;
2419 #endif
2420
2421   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
2422       new WebGraphicsContext3DCommandBufferImpl(surface_id(),
2423                                                 GetURLForGraphicsContext3D(),
2424                                                 gpu_channel_host.get(),
2425                                                 attributes,
2426                                                 lose_context_when_out_of_memory,
2427                                                 limits,
2428                                                 NULL));
2429   return context.Pass();
2430 }
2431
2432 void RenderWidget::RegisterRenderFrameProxy(RenderFrameProxy* proxy) {
2433   render_frame_proxies_.AddObserver(proxy);
2434 }
2435
2436 void RenderWidget::UnregisterRenderFrameProxy(RenderFrameProxy* proxy) {
2437   render_frame_proxies_.RemoveObserver(proxy);
2438 }
2439
2440 void RenderWidget::RegisterRenderFrame(RenderFrameImpl* frame) {
2441   render_frames_.AddObserver(frame);
2442 }
2443
2444 void RenderWidget::UnregisterRenderFrame(RenderFrameImpl* frame) {
2445   render_frames_.RemoveObserver(frame);
2446 }
2447
2448 #if defined(VIDEO_HOLE)
2449 void RenderWidget::RegisterVideoHoleFrame(RenderFrameImpl* frame) {
2450   video_hole_frames_.AddObserver(frame);
2451 }
2452
2453 void RenderWidget::UnregisterVideoHoleFrame(RenderFrameImpl* frame) {
2454   video_hole_frames_.RemoveObserver(frame);
2455 }
2456 #endif  // defined(VIDEO_HOLE)
2457
2458 }  // namespace content