content/browser/renderer_host/render_widget_host_view_base.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/browser/renderer_host/render_widget_host_view_base.h"
   6
   7 #include "base/logging.h"
   8 #include "base/profiler/scoped_tracker.h"
   9 #include "content/browser/accessibility/browser_accessibility_manager.h"
  10 #include "content/browser/gpu/gpu_data_manager_impl.h"
  11 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
  12 #include "content/browser/renderer_host/render_process_host_impl.h"
  13 #include "content/browser/renderer_host/render_widget_host_impl.h"
  14 #include "content/common/content_switches_internal.h"
  15 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
  16 #include "ui/gfx/display.h"
  17 #include "ui/gfx/geometry/size_conversions.h"
  18 #include "ui/gfx/geometry/size_f.h"
  19 #include "ui/gfx/screen.h"
  20
  21 #if defined(OS_WIN)
  22 #include "base/command_line.h"
  23 #include "base/message_loop/message_loop.h"
  24 #include "base/win/wrapped_window_proc.h"
  25 #include "content/browser/plugin_process_host.h"
  26 #include "content/browser/plugin_service_impl.h"
  27 #include "content/common/plugin_constants_win.h"
  28 #include "content/common/webplugin_geometry.h"
  29 #include "content/public/browser/browser_thread.h"
  30 #include "content/public/browser/child_process_data.h"
  31 #include "content/public/common/content_switches.h"
  32 #include "ui/gfx/gdi_util.h"
  33 #include "ui/gfx/win/dpi.h"
  34 #include "ui/gfx/win/hwnd_util.h"
  35 #endif
  36
  37 namespace content {
  38
  39 #if defined(OS_WIN)
  40
  41 namespace {
  42
  43 // |window| is the plugin HWND, created and destroyed in the plugin process.
  44 // |parent| is the parent HWND, created and destroyed on the browser UI thread.
  45 void NotifyPluginProcessHostHelper(HWND window, HWND parent, int tries) {
  46   // How long to wait between each try.
  47   static const int kTryDelayMs = 200;
  48
  49   DWORD plugin_process_id;
  50   bool found_starting_plugin_process = false;
  51   GetWindowThreadProcessId(window, &plugin_process_id);
  52   for (PluginProcessHostIterator iter; !iter.Done(); ++iter) {
  53     if (!iter.GetData().handle) {
  54       found_starting_plugin_process = true;
  55       continue;
  56     }
  57     if (base::GetProcId(iter.GetData().handle) == plugin_process_id) {
  58       iter->AddWindow(parent);
  59       return;
  60     }
  61   }
  62
  63   if (found_starting_plugin_process) {
  64     // A plugin process has started but we don't have its handle yet.  Since
  65     // it's most likely the one for this plugin, try a few more times after a
  66     // delay.
  67     if (tries > 0) {
  68       base::MessageLoop::current()->PostDelayedTask(
  69           FROM_HERE,
  70           base::Bind(&NotifyPluginProcessHostHelper, window, parent, tries - 1),
  71           base::TimeDelta::FromMilliseconds(kTryDelayMs));
  72       return;
  73     }
  74   }
  75
  76   // The plugin process might have died in the time to execute the task, don't
  77   // leak the HWND.
  78   PostMessage(parent, WM_CLOSE, 0, 0);
  79 }
  80
  81 // The plugin wrapper window which lives in the browser process has this proc
  82 // as its window procedure. We only handle the WM_PARENTNOTIFY message sent by
  83 // windowed plugins for mouse input. This is forwarded off to the wrappers
  84 // parent which is typically the RVH window which turns on user gesture.
  85 LRESULT CALLBACK PluginWrapperWindowProc(HWND window, unsigned int message,
  86                                          WPARAM wparam, LPARAM lparam) {
  87   // TODO(vadimt): Remove ScopedTracker below once crbug.com/440919 is fixed.
  88   tracked_objects::ScopedTracker tracking_profile(
  89       FROM_HERE_WITH_EXPLICIT_FUNCTION("440919 PluginWrapperWindowProc"));
  90
  91   if (message == WM_PARENTNOTIFY) {
  92     switch (LOWORD(wparam)) {
  93       case WM_LBUTTONDOWN:
  94       case WM_RBUTTONDOWN:
  95       case WM_MBUTTONDOWN:
  96         ::SendMessage(GetParent(window), message, wparam, lparam);
  97         return 0;
  98       default:
  99         break;
 100     }
 101   }
 102   return ::DefWindowProc(window, message, wparam, lparam);
 103 }
 104
 105 bool IsPluginWrapperWindow(HWND window) {
 106   return gfx::GetClassNameW(window) ==
 107       base::string16(kWrapperNativeWindowClassName);
 108 }
 109
 110 // Create an intermediate window between the given HWND and its parent.
 111 HWND ReparentWindow(HWND window, HWND parent) {
 112   static ATOM atom = 0;
 113   static HMODULE instance = NULL;
 114   if (!atom) {
 115     WNDCLASSEX window_class;
 116     base::win::InitializeWindowClass(
 117         kWrapperNativeWindowClassName,
 118         &base::win::WrappedWindowProc<PluginWrapperWindowProc>,
 119         CS_DBLCLKS,
 120         0,
 121         0,
 122         NULL,
 123         // xxx reinterpret_cast<HBRUSH>(COLOR_WINDOW+1),
 124         reinterpret_cast<HBRUSH>(COLOR_GRAYTEXT+1),
 125         NULL,
 126         NULL,
 127         NULL,
 128         &window_class);
 129     instance = window_class.hInstance;
 130     atom = RegisterClassEx(&window_class);
 131   }
 132   DCHECK(atom);
 133
 134   HWND new_parent = CreateWindowEx(
 135       WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
 136       MAKEINTATOM(atom), 0,
 137       WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
 138       0, 0, 0, 0, parent, 0, instance, 0);
 139   gfx::CheckWindowCreated(new_parent);
 140   ::SetParent(window, new_parent);
 141   // How many times we try to find a PluginProcessHost whose process matches
 142   // the HWND.
 143   static const int kMaxTries = 5;
 144   BrowserThread::PostTask(
 145       BrowserThread::IO,
 146       FROM_HERE,
 147       base::Bind(&NotifyPluginProcessHostHelper, window, new_parent,
 148                  kMaxTries));
 149   return new_parent;
 150 }
 151
 152 BOOL CALLBACK PaintEnumChildProc(HWND hwnd, LPARAM lparam) {
 153   if (!PluginServiceImpl::GetInstance()->IsPluginWindow(hwnd))
 154     return TRUE;
 155
 156   gfx::Rect* rect = reinterpret_cast<gfx::Rect*>(lparam);
 157   gfx::Rect rect_in_pixels = gfx::win::DIPToScreenRect(*rect);
 158   static UINT msg = RegisterWindowMessage(kPaintMessageName);
 159   WPARAM wparam = MAKEWPARAM(rect_in_pixels.x(), rect_in_pixels.y());
 160   lparam = MAKELPARAM(rect_in_pixels.width(), rect_in_pixels.height());
 161
 162   // SendMessage gets the message across much quicker than PostMessage, since it
 163   // doesn't get queued.  When the plugin thread calls PeekMessage or other
 164   // Win32 APIs, sent messages are dispatched automatically.
 165   SendNotifyMessage(hwnd, msg, wparam, lparam);
 166
 167   return TRUE;
 168 }
 169
 170 // Windows callback for OnDestroy to detach the plugin windows.
 171 BOOL CALLBACK DetachPluginWindowsCallbackInternal(HWND window, LPARAM param) {
 172   RenderWidgetHostViewBase::DetachPluginWindowsCallback(window);
 173   return TRUE;
 174 }
 175
 176 }  // namespace
 177
 178 // static
 179 void RenderWidgetHostViewBase::DetachPluginWindowsCallback(HWND window) {
 180   if (PluginServiceImpl::GetInstance()->IsPluginWindow(window) &&
 181       !IsHungAppWindow(window)) {
 182     ::ShowWindow(window, SW_HIDE);
 183     SetParent(window, NULL);
 184   }
 185 }
 186
 187 // static
 188 void RenderWidgetHostViewBase::MovePluginWindowsHelper(
 189     HWND parent,
 190     const std::vector<WebPluginGeometry>& moves) {
 191   if (moves.empty())
 192     return;
 193
 194   bool oop_plugins = !base::CommandLine::ForCurrentProcess()->HasSwitch(
 195       switches::kSingleProcess);
 196
 197   HDWP defer_window_pos_info =
 198       ::BeginDeferWindowPos(static_cast<int>(moves.size()));
 199
 200   if (!defer_window_pos_info) {
 201     NOTREACHED();
 202     return;
 203   }
 204
 205 #if defined(USE_AURA)
 206   std::vector<RECT> invalidate_rects;
 207 #endif
 208
 209   for (size_t i = 0; i < moves.size(); ++i) {
 210     unsigned long flags = 0;
 211     const WebPluginGeometry& move = moves[i];
 212     HWND window = move.window;
 213
 214     // As the plugin parent window which lives on the browser UI thread is
 215     // destroyed asynchronously, it is possible that we have a stale window
 216     // sent in by the renderer for moving around.
 217     // Note: get the parent before checking if the window is valid, to avoid a
 218     // race condition where the window is destroyed after the check but before
 219     // the GetParent call.
 220     HWND cur_parent = ::GetParent(window);
 221     if (!::IsWindow(window))
 222       continue;
 223
 224     if (!PluginServiceImpl::GetInstance()->IsPluginWindow(window)) {
 225       // The renderer should only be trying to move plugin windows. However,
 226       // this may happen as a result of a race condition (i.e. even after the
 227       // check right above), so we ignore it.
 228       continue;
 229     }
 230
 231     if (oop_plugins) {
 232       if (cur_parent == GetDesktopWindow()) {
 233         // The plugin window hasn't been parented yet, add an intermediate
 234         // window that lives on this thread to speed up scrolling. Note this
 235         // only works with out of process plugins since we depend on
 236         // PluginProcessHost to destroy the intermediate HWNDs.
 237         cur_parent = ReparentWindow(window, parent);
 238         ::ShowWindow(window, SW_SHOW);  // Window was created hidden.
 239       } else if (!IsPluginWrapperWindow(cur_parent)) {
 240         continue;  // Race if plugin process is shutting down.
 241       }
 242
 243       // We move the intermediate parent window which doesn't result in cross-
 244       // process synchronous Windows messages.
 245       window = cur_parent;
 246     } else {
 247       if (cur_parent == GetDesktopWindow())
 248         SetParent(window, parent);
 249     }
 250
 251     if (move.visible)
 252       flags |= SWP_SHOWWINDOW;
 253     else
 254       flags |= SWP_HIDEWINDOW;
 255
 256 #if defined(USE_AURA)
 257     if (GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 258       // Without this flag, Windows repaints the parent area uncovered by this
 259       // move. However when software compositing is used the clipping region is
 260       // ignored. Since in Aura the browser chrome could be under the plugin, if
 261       // if Windows tries to paint it synchronously inside EndDeferWindowsPos
 262       // then it won't have the data and it will flash white. So instead we
 263       // manually redraw the plugin.
 264       // Why not do this for native Windows? Not sure if there are any
 265       // performance issues with this.
 266       flags |= SWP_NOREDRAW;
 267     }
 268 #endif
 269
 270     if (move.rects_valid) {
 271       gfx::Rect clip_rect_in_pixel = gfx::win::DIPToScreenRect(move.clip_rect);
 272       HRGN hrgn = ::CreateRectRgn(clip_rect_in_pixel.x(),
 273                                   clip_rect_in_pixel.y(),
 274                                   clip_rect_in_pixel.right(),
 275                                   clip_rect_in_pixel.bottom());
 276       gfx::SubtractRectanglesFromRegion(hrgn, move.cutout_rects);
 277
 278       // Note: System will own the hrgn after we call SetWindowRgn,
 279       // so we don't need to call DeleteObject(hrgn)
 280       ::SetWindowRgn(window, hrgn,
 281                      !move.clip_rect.IsEmpty() && (flags & SWP_NOREDRAW) == 0);
 282
 283 #if defined(USE_AURA)
 284       // When using the software compositor, if the clipping rectangle is empty
 285       // then DeferWindowPos won't redraw the newly uncovered area under the
 286       // plugin.
 287       if (clip_rect_in_pixel.IsEmpty() &&
 288           !GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 289         RECT r;
 290         GetClientRect(window, &r);
 291         MapWindowPoints(window, parent, reinterpret_cast<POINT*>(&r), 2);
 292         invalidate_rects.push_back(r);
 293       }
 294 #endif
 295     } else {
 296       flags |= SWP_NOMOVE;
 297       flags |= SWP_NOSIZE;
 298     }
 299
 300     gfx::Rect window_rect_in_pixel =
 301         gfx::win::DIPToScreenRect(move.window_rect);
 302     defer_window_pos_info = ::DeferWindowPos(defer_window_pos_info,
 303                                              window, NULL,
 304                                              window_rect_in_pixel.x(),
 305                                              window_rect_in_pixel.y(),
 306                                              window_rect_in_pixel.width(),
 307                                              window_rect_in_pixel.height(),
 308                                              flags);
 309
 310     if (!defer_window_pos_info) {
 311       DCHECK(false) << "DeferWindowPos failed, so all plugin moves ignored.";
 312       return;
 313     }
 314   }
 315
 316   ::EndDeferWindowPos(defer_window_pos_info);
 317
 318 #if defined(USE_AURA)
 319   if (GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 320     for (size_t i = 0; i < moves.size(); ++i) {
 321       const WebPluginGeometry& move = moves[i];
 322       RECT r;
 323       GetWindowRect(move.window, &r);
 324       gfx::Rect gr(r);
 325       PaintEnumChildProc(move.window, reinterpret_cast<LPARAM>(&gr));
 326     }
 327   } else {
 328       for (size_t i = 0; i < invalidate_rects.size(); ++i) {
 329       ::RedrawWindow(
 330           parent, &invalidate_rects[i], NULL,
 331           // These flags are from WebPluginDelegateImpl::NativeWndProc.
 332           RDW_INVALIDATE | RDW_ALLCHILDREN | RDW_FRAME | RDW_UPDATENOW);
 333     }
 334   }
 335 #endif
 336 }
 337
 338 // static
 339 void RenderWidgetHostViewBase::PaintPluginWindowsHelper(
 340     HWND parent, const gfx::Rect& damaged_screen_rect) {
 341   LPARAM lparam = reinterpret_cast<LPARAM>(&damaged_screen_rect);
 342   EnumChildWindows(parent, PaintEnumChildProc, lparam);
 343 }
 344
 345 // static
 346 void RenderWidgetHostViewBase::DetachPluginsHelper(HWND parent) {
 347   // When a tab is closed all its child plugin windows are destroyed
 348   // automatically. This happens before plugins get any notification that its
 349   // instances are tearing down.
 350   //
 351   // Plugins like Quicktime assume that their windows will remain valid as long
 352   // as they have plugin instances active. Quicktime crashes in this case
 353   // because its windowing code cleans up an internal data structure that the
 354   // handler for NPP_DestroyStream relies on.
 355   //
 356   // The fix is to detach plugin windows from web contents when it is going
 357   // away. This will prevent the plugin windows from getting destroyed
 358   // automatically. The detached plugin windows will get cleaned up in proper
 359   // sequence as part of the usual cleanup when the plugin instance goes away.
 360   EnumChildWindows(parent, DetachPluginWindowsCallbackInternal, NULL);
 361 }
 362
 363 #endif  // OS_WIN
 364
 365 namespace {
 366
 367 // How many microseconds apart input events should be flushed.
 368 const int kFlushInputRateInUs = 16666;
 369
 370 }
 371
 372 RenderWidgetHostViewBase::RenderWidgetHostViewBase()
 373     : popup_type_(blink::WebPopupTypeNone),
 374       background_color_(SK_ColorWHITE),
 375       mouse_locked_(false),
 376       showing_context_menu_(false),
 377       selection_text_offset_(0),
 378       selection_range_(gfx::Range::InvalidRange()),
 379       current_device_scale_factor_(0),
 380       current_display_rotation_(gfx::Display::ROTATE_0),
 381       pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
 382       renderer_frame_number_(0),
 383       weak_factory_(this) {
 384 }
 385
 386 RenderWidgetHostViewBase::~RenderWidgetHostViewBase() {
 387   DCHECK(!mouse_locked_);
 388 }
 389
 390 bool RenderWidgetHostViewBase::OnMessageReceived(const IPC::Message& msg){
 391   return false;
 392 }
 393
 394 void RenderWidgetHostViewBase::SetBackgroundColor(SkColor color) {
 395   background_color_ = color;
 396 }
 397
 398 void RenderWidgetHostViewBase::SetBackgroundColorToDefault() {
 399   SetBackgroundColor(SK_ColorWHITE);
 400 }
 401
 402 bool RenderWidgetHostViewBase::GetBackgroundOpaque() {
 403   return SkColorGetA(background_color_) == SK_AlphaOPAQUE;
 404 }
 405
 406 gfx::Size RenderWidgetHostViewBase::GetPhysicalBackingSize() const {
 407   gfx::NativeView view = GetNativeView();
 408   gfx::Display display =
 409       gfx::Screen::GetScreenFor(view)->GetDisplayNearestWindow(view);
 410   return gfx::ToCeiledSize(gfx::ScaleSize(GetRequestedRendererSize(),
 411                                           display.device_scale_factor()));
 412 }
 413
 414 bool RenderWidgetHostViewBase::DoTopControlsShrinkBlinkSize() const {
 415   return false;
 416 }
 417
 418 float RenderWidgetHostViewBase::GetTopControlsHeight() const {
 419   return 0.f;
 420 }
 421
 422 void RenderWidgetHostViewBase::SelectionChanged(const base::string16& text,
 423                                                 size_t offset,
 424                                                 const gfx::Range& range) {
 425   selection_text_ = text;
 426   selection_text_offset_ = offset;
 427   selection_range_.set_start(range.start());
 428   selection_range_.set_end(range.end());
 429 }
 430
 431 gfx::Size RenderWidgetHostViewBase::GetRequestedRendererSize() const {
 432   return GetViewBounds().size();
 433 }
 434
 435 ui::TextInputClient* RenderWidgetHostViewBase::GetTextInputClient() {
 436   NOTREACHED();
 437   return NULL;
 438 }
 439
 440 bool RenderWidgetHostViewBase::IsShowingContextMenu() const {
 441   return showing_context_menu_;
 442 }
 443
 444 void RenderWidgetHostViewBase::SetShowingContextMenu(bool showing) {
 445   DCHECK_NE(showing_context_menu_, showing);
 446   showing_context_menu_ = showing;
 447 }
 448
 449 base::string16 RenderWidgetHostViewBase::GetSelectedText() const {
 450   if (!selection_range_.IsValid())
 451     return base::string16();
 452   return selection_text_.substr(
 453       selection_range_.GetMin() - selection_text_offset_,
 454       selection_range_.length());
 455 }
 456
 457 bool RenderWidgetHostViewBase::IsMouseLocked() {
 458   return mouse_locked_;
 459 }
 460
 461 InputEventAckState RenderWidgetHostViewBase::FilterInputEvent(
 462     const blink::WebInputEvent& input_event) {
 463   // By default, input events are simply forwarded to the renderer.
 464   return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
 465 }
 466
 467 void RenderWidgetHostViewBase::OnSetNeedsFlushInput() {
 468   if (flush_input_timer_.IsRunning())
 469     return;
 470
 471   flush_input_timer_.Start(
 472       FROM_HERE,
 473       base::TimeDelta::FromMicroseconds(kFlushInputRateInUs),
 474       this,
 475       &RenderWidgetHostViewBase::FlushInput);
 476 }
 477
 478 void RenderWidgetHostViewBase::WheelEventAck(
 479     const blink::WebMouseWheelEvent& event,
 480     InputEventAckState ack_result) {
 481 }
 482
 483 void RenderWidgetHostViewBase::GestureEventAck(
 484     const blink::WebGestureEvent& event,
 485     InputEventAckState ack_result) {
 486 }
 487
 488 void RenderWidgetHostViewBase::SetPopupType(blink::WebPopupType popup_type) {
 489   popup_type_ = popup_type;
 490 }
 491
 492 blink::WebPopupType RenderWidgetHostViewBase::GetPopupType() {
 493   return popup_type_;
 494 }
 495
 496 BrowserAccessibilityManager*
 497 RenderWidgetHostViewBase::CreateBrowserAccessibilityManager(
 498     BrowserAccessibilityDelegate* delegate) {
 499   NOTREACHED();
 500   return NULL;
 501 }
 502
 503 void RenderWidgetHostViewBase::AccessibilityShowMenu(const gfx::Point& point) {
 504 }
 505
 506 gfx::Point RenderWidgetHostViewBase::AccessibilityOriginInScreen(
 507     const gfx::Rect& bounds) {
 508   return bounds.origin();
 509 }
 510
 511 gfx::AcceleratedWidget
 512     RenderWidgetHostViewBase::AccessibilityGetAcceleratedWidget() {
 513   return gfx::kNullAcceleratedWidget;
 514 }
 515
 516 gfx::NativeViewAccessible
 517     RenderWidgetHostViewBase::AccessibilityGetNativeViewAccessible() {
 518   return NULL;
 519 }
 520
 521 void RenderWidgetHostViewBase::UpdateScreenInfo(gfx::NativeView view) {
 522   RenderWidgetHostImpl* impl = NULL;
 523   if (GetRenderWidgetHost())
 524     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 525
 526   if (impl)
 527     impl->SendScreenRects();
 528
 529   if (HasDisplayPropertyChanged(view) && impl)
 530     impl->NotifyScreenInfoChanged();
 531 }
 532
 533 bool RenderWidgetHostViewBase::HasDisplayPropertyChanged(gfx::NativeView view) {
 534   gfx::Display display =
 535       gfx::Screen::GetScreenFor(view)->GetDisplayNearestWindow(view);
 536   if (current_display_area_ == display.work_area() &&
 537       current_device_scale_factor_ == display.device_scale_factor() &&
 538       current_display_rotation_ == display.rotation()) {
 539     return false;
 540   }
 541
 542   current_display_area_ = display.work_area();
 543   current_device_scale_factor_ = display.device_scale_factor();
 544   current_display_rotation_ = display.rotation();
 545   return true;
 546 }
 547
 548 base::WeakPtr<RenderWidgetHostViewBase> RenderWidgetHostViewBase::GetWeakPtr() {
 549   return weak_factory_.GetWeakPtr();
 550 }
 551
 552 scoped_ptr<SyntheticGestureTarget>
 553 RenderWidgetHostViewBase::CreateSyntheticGestureTarget() {
 554   RenderWidgetHostImpl* host =
 555       RenderWidgetHostImpl::From(GetRenderWidgetHost());
 556   return scoped_ptr<SyntheticGestureTarget>(
 557       new SyntheticGestureTargetBase(host));
 558 }
 559
 560 // Platform implementation should override this method to allow frame
 561 // subscription. Frame subscriber is set to RenderProcessHost, which is
 562 // platform independent. It should be set to the specific presenter on each
 563 // platform.
 564 bool RenderWidgetHostViewBase::CanSubscribeFrame() const {
 565   NOTIMPLEMENTED();
 566   return false;
 567 }
 568
 569 // Base implementation for this method sets the subscriber to RenderProcessHost,
 570 // which is platform independent. Note: Implementation only support subscribing
 571 // to accelerated composited frames.
 572 void RenderWidgetHostViewBase::BeginFrameSubscription(
 573     scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) {
 574   RenderWidgetHostImpl* impl = NULL;
 575   if (GetRenderWidgetHost())
 576     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 577   if (!impl)
 578     return;
 579   RenderProcessHostImpl* render_process_host =
 580       static_cast<RenderProcessHostImpl*>(impl->GetProcess());
 581   render_process_host->BeginFrameSubscription(impl->GetRoutingID(),
 582                                               subscriber.Pass());
 583 }
 584
 585 void RenderWidgetHostViewBase::EndFrameSubscription() {
 586   RenderWidgetHostImpl* impl = NULL;
 587   if (GetRenderWidgetHost())
 588     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 589   if (!impl)
 590     return;
 591   RenderProcessHostImpl* render_process_host =
 592       static_cast<RenderProcessHostImpl*>(impl->GetProcess());
 593   render_process_host->EndFrameSubscription(impl->GetRoutingID());
 594 }
 595
 596 uint32 RenderWidgetHostViewBase::RendererFrameNumber() {
 597   return renderer_frame_number_;
 598 }
 599
 600 void RenderWidgetHostViewBase::DidReceiveRendererFrame() {
 601   ++renderer_frame_number_;
 602 }
 603
 604 void RenderWidgetHostViewBase::FlushInput() {
 605   RenderWidgetHostImpl* impl = NULL;
 606   if (GetRenderWidgetHost())
 607     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 608   if (!impl)
 609     return;
 610   impl->FlushInput();
 611 }
 612
 613 SkColorType RenderWidgetHostViewBase::PreferredReadbackFormat() {
 614   return kN32_SkColorType;
 615 }
 616
 617 void RenderWidgetHostViewBase::OnTextSurroundingSelectionResponse(
 618     const base::string16& content,
 619     size_t start_offset,
 620     size_t end_offset) {
 621   NOTIMPLEMENTED();
 622 }
 623
 624 void RenderWidgetHostViewBase::ShowDisambiguationPopup(
 625     const gfx::Rect& rect_pixels,
 626     const SkBitmap& zoomed_bitmap) {
 627   NOTIMPLEMENTED();
 628 }
 629
 630 gfx::Size RenderWidgetHostViewBase::GetVisibleViewportSize() const {
 631   return GetViewBounds().size();
 632 }
 633
 634 void RenderWidgetHostViewBase::SetInsets(const gfx::Insets& insets) {
 635   NOTIMPLEMENTED();
 636 }
 637
 638 // static
 639 blink::WebScreenOrientationType
 640 RenderWidgetHostViewBase::GetOrientationTypeForMobile(
 641     const gfx::Display& display) {
 642   int angle = display.RotationAsDegree();
 643   const gfx::Rect& bounds = display.bounds();
 644
 645   // Whether the device's natural orientation is portrait.
 646   bool natural_portrait = false;
 647   if (angle == 0 || angle == 180) // The device is in its natural orientation.
 648     natural_portrait = bounds.height() >= bounds.width();
 649   else
 650     natural_portrait = bounds.height() <= bounds.width();
 651
 652   switch (angle) {
 653   case 0:
 654     return natural_portrait ? blink::WebScreenOrientationPortraitPrimary
 655                            : blink::WebScreenOrientationLandscapePrimary;
 656   case 90:
 657     return natural_portrait ? blink::WebScreenOrientationLandscapePrimary
 658                            : blink::WebScreenOrientationPortraitSecondary;
 659   case 180:
 660     return natural_portrait ? blink::WebScreenOrientationPortraitSecondary
 661                            : blink::WebScreenOrientationLandscapeSecondary;
 662   case 270:
 663     return natural_portrait ? blink::WebScreenOrientationLandscapeSecondary
 664                            : blink::WebScreenOrientationPortraitPrimary;
 665   default:
 666     NOTREACHED();
 667     return blink::WebScreenOrientationPortraitPrimary;
 668   }
 669 }
 670
 671 // static
 672 blink::WebScreenOrientationType
 673 RenderWidgetHostViewBase::GetOrientationTypeForDesktop(
 674     const gfx::Display& display) {
 675   static int primary_landscape_angle = -1;
 676   static int primary_portrait_angle = -1;
 677
 678   int angle = display.RotationAsDegree();
 679   const gfx::Rect& bounds = display.bounds();
 680   bool is_portrait = bounds.height() >= bounds.width();
 681
 682   if (is_portrait && primary_portrait_angle == -1)
 683     primary_portrait_angle = angle;
 684
 685   if (!is_portrait && primary_landscape_angle == -1)
 686     primary_landscape_angle = angle;
 687
 688   if (is_portrait) {
 689     return primary_portrait_angle == angle
 690         ? blink::WebScreenOrientationPortraitPrimary
 691         : blink::WebScreenOrientationPortraitSecondary;
 692   }
 693
 694   return primary_landscape_angle == angle
 695       ? blink::WebScreenOrientationLandscapePrimary
 696       : blink::WebScreenOrientationLandscapeSecondary;
 697 }
 698
 699 void RenderWidgetHostViewBase::OnDidNavigateMainFrameToNewPage() {
 700 }
 701
 702 }  // namespace content