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   if (message == WM_PARENTNOTIFY) {
  88     switch (LOWORD(wparam)) {
  89       case WM_LBUTTONDOWN:
  90       case WM_RBUTTONDOWN:
  91       case WM_MBUTTONDOWN:
  92         ::SendMessage(GetParent(window), message, wparam, lparam);
  93         return 0;
  94       default:
  95         break;
  96     }
  97   }
  98   return ::DefWindowProc(window, message, wparam, lparam);
  99 }
 100
 101 bool IsPluginWrapperWindow(HWND window) {
 102   return gfx::GetClassNameW(window) ==
 103       base::string16(kWrapperNativeWindowClassName);
 104 }
 105
 106 // Create an intermediate window between the given HWND and its parent.
 107 HWND ReparentWindow(HWND window, HWND parent) {
 108   static ATOM atom = 0;
 109   static HMODULE instance = NULL;
 110   if (!atom) {
 111     WNDCLASSEX window_class;
 112     base::win::InitializeWindowClass(
 113         kWrapperNativeWindowClassName,
 114         &base::win::WrappedWindowProc<PluginWrapperWindowProc>,
 115         CS_DBLCLKS,
 116         0,
 117         0,
 118         NULL,
 119         // xxx reinterpret_cast<HBRUSH>(COLOR_WINDOW+1),
 120         reinterpret_cast<HBRUSH>(COLOR_GRAYTEXT+1),
 121         NULL,
 122         NULL,
 123         NULL,
 124         &window_class);
 125     instance = window_class.hInstance;
 126     atom = RegisterClassEx(&window_class);
 127   }
 128   DCHECK(atom);
 129
 130   HWND new_parent = CreateWindowEx(
 131       WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
 132       MAKEINTATOM(atom), 0,
 133       WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
 134       0, 0, 0, 0, parent, 0, instance, 0);
 135   gfx::CheckWindowCreated(new_parent);
 136   ::SetParent(window, new_parent);
 137   // How many times we try to find a PluginProcessHost whose process matches
 138   // the HWND.
 139   static const int kMaxTries = 5;
 140   BrowserThread::PostTask(
 141       BrowserThread::IO,
 142       FROM_HERE,
 143       base::Bind(&NotifyPluginProcessHostHelper, window, new_parent,
 144                  kMaxTries));
 145   return new_parent;
 146 }
 147
 148 BOOL CALLBACK PaintEnumChildProc(HWND hwnd, LPARAM lparam) {
 149   if (!PluginServiceImpl::GetInstance()->IsPluginWindow(hwnd))
 150     return TRUE;
 151
 152   gfx::Rect* rect = reinterpret_cast<gfx::Rect*>(lparam);
 153   gfx::Rect rect_in_pixels = gfx::win::DIPToScreenRect(*rect);
 154   static UINT msg = RegisterWindowMessage(kPaintMessageName);
 155   WPARAM wparam = MAKEWPARAM(rect_in_pixels.x(), rect_in_pixels.y());
 156   lparam = MAKELPARAM(rect_in_pixels.width(), rect_in_pixels.height());
 157
 158   // SendMessage gets the message across much quicker than PostMessage, since it
 159   // doesn't get queued.  When the plugin thread calls PeekMessage or other
 160   // Win32 APIs, sent messages are dispatched automatically.
 161   SendNotifyMessage(hwnd, msg, wparam, lparam);
 162
 163   return TRUE;
 164 }
 165
 166 // Windows callback for OnDestroy to detach the plugin windows.
 167 BOOL CALLBACK DetachPluginWindowsCallbackInternal(HWND window, LPARAM param) {
 168   RenderWidgetHostViewBase::DetachPluginWindowsCallback(window);
 169   return TRUE;
 170 }
 171
 172 }  // namespace
 173
 174 // static
 175 void RenderWidgetHostViewBase::DetachPluginWindowsCallback(HWND window) {
 176   if (PluginServiceImpl::GetInstance()->IsPluginWindow(window) &&
 177       !IsHungAppWindow(window)) {
 178     ::ShowWindow(window, SW_HIDE);
 179     SetParent(window, NULL);
 180   }
 181 }
 182
 183 // static
 184 void RenderWidgetHostViewBase::MovePluginWindowsHelper(
 185     HWND parent,
 186     const std::vector<WebPluginGeometry>& moves) {
 187   if (moves.empty())
 188     return;
 189
 190   bool oop_plugins = !base::CommandLine::ForCurrentProcess()->HasSwitch(
 191       switches::kSingleProcess);
 192
 193   HDWP defer_window_pos_info =
 194       ::BeginDeferWindowPos(static_cast<int>(moves.size()));
 195
 196   if (!defer_window_pos_info) {
 197     NOTREACHED();
 198     return;
 199   }
 200
 201 #if defined(USE_AURA)
 202   std::vector<RECT> invalidate_rects;
 203 #endif
 204
 205   for (size_t i = 0; i < moves.size(); ++i) {
 206     unsigned long flags = 0;
 207     const WebPluginGeometry& move = moves[i];
 208     HWND window = move.window;
 209
 210     // As the plugin parent window which lives on the browser UI thread is
 211     // destroyed asynchronously, it is possible that we have a stale window
 212     // sent in by the renderer for moving around.
 213     // Note: get the parent before checking if the window is valid, to avoid a
 214     // race condition where the window is destroyed after the check but before
 215     // the GetParent call.
 216     HWND cur_parent = ::GetParent(window);
 217     if (!::IsWindow(window))
 218       continue;
 219
 220     if (!PluginServiceImpl::GetInstance()->IsPluginWindow(window)) {
 221       // The renderer should only be trying to move plugin windows. However,
 222       // this may happen as a result of a race condition (i.e. even after the
 223       // check right above), so we ignore it.
 224       continue;
 225     }
 226
 227     if (oop_plugins) {
 228       if (cur_parent == GetDesktopWindow()) {
 229         // The plugin window hasn't been parented yet, add an intermediate
 230         // window that lives on this thread to speed up scrolling. Note this
 231         // only works with out of process plugins since we depend on
 232         // PluginProcessHost to destroy the intermediate HWNDs.
 233         cur_parent = ReparentWindow(window, parent);
 234         ::ShowWindow(window, SW_SHOW);  // Window was created hidden.
 235       } else if (!IsPluginWrapperWindow(cur_parent)) {
 236         continue;  // Race if plugin process is shutting down.
 237       }
 238
 239       // We move the intermediate parent window which doesn't result in cross-
 240       // process synchronous Windows messages.
 241       window = cur_parent;
 242     } else {
 243       if (cur_parent == GetDesktopWindow())
 244         SetParent(window, parent);
 245     }
 246
 247     if (move.visible)
 248       flags |= SWP_SHOWWINDOW;
 249     else
 250       flags |= SWP_HIDEWINDOW;
 251
 252 #if defined(USE_AURA)
 253     if (GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 254       // Without this flag, Windows repaints the parent area uncovered by this
 255       // move. However when software compositing is used the clipping region is
 256       // ignored. Since in Aura the browser chrome could be under the plugin, if
 257       // if Windows tries to paint it synchronously inside EndDeferWindowsPos
 258       // then it won't have the data and it will flash white. So instead we
 259       // manually redraw the plugin.
 260       // Why not do this for native Windows? Not sure if there are any
 261       // performance issues with this.
 262       flags |= SWP_NOREDRAW;
 263     }
 264 #endif
 265
 266     if (move.rects_valid) {
 267       gfx::Rect clip_rect_in_pixel = gfx::win::DIPToScreenRect(move.clip_rect);
 268       HRGN hrgn = ::CreateRectRgn(clip_rect_in_pixel.x(),
 269                                   clip_rect_in_pixel.y(),
 270                                   clip_rect_in_pixel.right(),
 271                                   clip_rect_in_pixel.bottom());
 272       gfx::SubtractRectanglesFromRegion(hrgn, move.cutout_rects);
 273
 274       // Note: System will own the hrgn after we call SetWindowRgn,
 275       // so we don't need to call DeleteObject(hrgn)
 276       ::SetWindowRgn(window, hrgn,
 277                      !move.clip_rect.IsEmpty() && (flags & SWP_NOREDRAW) == 0);
 278
 279 #if defined(USE_AURA)
 280       // When using the software compositor, if the clipping rectangle is empty
 281       // then DeferWindowPos won't redraw the newly uncovered area under the
 282       // plugin.
 283       if (clip_rect_in_pixel.IsEmpty() &&
 284           !GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 285         RECT r;
 286         GetClientRect(window, &r);
 287         MapWindowPoints(window, parent, reinterpret_cast<POINT*>(&r), 2);
 288         invalidate_rects.push_back(r);
 289       }
 290 #endif
 291     } else {
 292       flags |= SWP_NOMOVE;
 293       flags |= SWP_NOSIZE;
 294     }
 295
 296     gfx::Rect window_rect_in_pixel =
 297         gfx::win::DIPToScreenRect(move.window_rect);
 298     defer_window_pos_info = ::DeferWindowPos(defer_window_pos_info,
 299                                              window, NULL,
 300                                              window_rect_in_pixel.x(),
 301                                              window_rect_in_pixel.y(),
 302                                              window_rect_in_pixel.width(),
 303                                              window_rect_in_pixel.height(),
 304                                              flags);
 305
 306     if (!defer_window_pos_info) {
 307       DCHECK(false) << "DeferWindowPos failed, so all plugin moves ignored.";
 308       return;
 309     }
 310   }
 311
 312   ::EndDeferWindowPos(defer_window_pos_info);
 313
 314 #if defined(USE_AURA)
 315   if (GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
 316     for (size_t i = 0; i < moves.size(); ++i) {
 317       const WebPluginGeometry& move = moves[i];
 318       RECT r;
 319       GetWindowRect(move.window, &r);
 320       gfx::Rect gr(r);
 321       PaintEnumChildProc(move.window, reinterpret_cast<LPARAM>(&gr));
 322     }
 323   } else {
 324       for (size_t i = 0; i < invalidate_rects.size(); ++i) {
 325       ::RedrawWindow(
 326           parent, &invalidate_rects[i], NULL,
 327           // These flags are from WebPluginDelegateImpl::NativeWndProc.
 328           RDW_INVALIDATE | RDW_ALLCHILDREN | RDW_FRAME | RDW_UPDATENOW);
 329     }
 330   }
 331 #endif
 332 }
 333
 334 // static
 335 void RenderWidgetHostViewBase::PaintPluginWindowsHelper(
 336     HWND parent, const gfx::Rect& damaged_screen_rect) {
 337   LPARAM lparam = reinterpret_cast<LPARAM>(&damaged_screen_rect);
 338   EnumChildWindows(parent, PaintEnumChildProc, lparam);
 339 }
 340
 341 // static
 342 void RenderWidgetHostViewBase::DetachPluginsHelper(HWND parent) {
 343   // When a tab is closed all its child plugin windows are destroyed
 344   // automatically. This happens before plugins get any notification that its
 345   // instances are tearing down.
 346   //
 347   // Plugins like Quicktime assume that their windows will remain valid as long
 348   // as they have plugin instances active. Quicktime crashes in this case
 349   // because its windowing code cleans up an internal data structure that the
 350   // handler for NPP_DestroyStream relies on.
 351   //
 352   // The fix is to detach plugin windows from web contents when it is going
 353   // away. This will prevent the plugin windows from getting destroyed
 354   // automatically. The detached plugin windows will get cleaned up in proper
 355   // sequence as part of the usual cleanup when the plugin instance goes away.
 356   EnumChildWindows(parent, DetachPluginWindowsCallbackInternal, NULL);
 357 }
 358
 359 #endif  // OS_WIN
 360
 361 namespace {
 362
 363 // How many microseconds apart input events should be flushed.
 364 const int kFlushInputRateInUs = 16666;
 365
 366 }
 367
 368 RenderWidgetHostViewBase::RenderWidgetHostViewBase()
 369     : popup_type_(blink::WebPopupTypeNone),
 370       background_color_(SK_ColorWHITE),
 371       mouse_locked_(false),
 372       showing_context_menu_(false),
 373       selection_text_offset_(0),
 374       selection_range_(gfx::Range::InvalidRange()),
 375       current_device_scale_factor_(0),
 376       current_display_rotation_(gfx::Display::ROTATE_0),
 377       pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
 378       renderer_frame_number_(0),
 379       weak_factory_(this) {
 380 }
 381
 382 RenderWidgetHostViewBase::~RenderWidgetHostViewBase() {
 383   DCHECK(!mouse_locked_);
 384 }
 385
 386 bool RenderWidgetHostViewBase::OnMessageReceived(const IPC::Message& msg){
 387   return false;
 388 }
 389
 390 void RenderWidgetHostViewBase::SetBackgroundColor(SkColor color) {
 391   background_color_ = color;
 392 }
 393
 394 void RenderWidgetHostViewBase::SetBackgroundColorToDefault() {
 395   SetBackgroundColor(SK_ColorWHITE);
 396 }
 397
 398 bool RenderWidgetHostViewBase::GetBackgroundOpaque() {
 399   return SkColorGetA(background_color_) == SK_AlphaOPAQUE;
 400 }
 401
 402 gfx::Size RenderWidgetHostViewBase::GetPhysicalBackingSize() const {
 403   gfx::NativeView view = GetNativeView();
 404   gfx::Display display =
 405       gfx::Screen::GetScreenFor(view)->GetDisplayNearestWindow(view);
 406   return gfx::ToCeiledSize(gfx::ScaleSize(GetRequestedRendererSize(),
 407                                           display.device_scale_factor()));
 408 }
 409
 410 bool RenderWidgetHostViewBase::DoTopControlsShrinkBlinkSize() const {
 411   return false;
 412 }
 413
 414 float RenderWidgetHostViewBase::GetTopControlsHeight() const {
 415   return 0.f;
 416 }
 417
 418 void RenderWidgetHostViewBase::SelectionChanged(const base::string16& text,
 419                                                 size_t offset,
 420                                                 const gfx::Range& range) {
 421   selection_text_ = text;
 422   selection_text_offset_ = offset;
 423   selection_range_.set_start(range.start());
 424   selection_range_.set_end(range.end());
 425 }
 426
 427 gfx::Size RenderWidgetHostViewBase::GetRequestedRendererSize() const {
 428   return GetViewBounds().size();
 429 }
 430
 431 ui::TextInputClient* RenderWidgetHostViewBase::GetTextInputClient() {
 432   NOTREACHED();
 433   return NULL;
 434 }
 435
 436 bool RenderWidgetHostViewBase::IsShowingContextMenu() const {
 437   return showing_context_menu_;
 438 }
 439
 440 void RenderWidgetHostViewBase::SetShowingContextMenu(bool showing) {
 441   DCHECK_NE(showing_context_menu_, showing);
 442   showing_context_menu_ = showing;
 443 }
 444
 445 base::string16 RenderWidgetHostViewBase::GetSelectedText() const {
 446   if (!selection_range_.IsValid())
 447     return base::string16();
 448   return selection_text_.substr(
 449       selection_range_.GetMin() - selection_text_offset_,
 450       selection_range_.length());
 451 }
 452
 453 bool RenderWidgetHostViewBase::IsMouseLocked() {
 454   return mouse_locked_;
 455 }
 456
 457 InputEventAckState RenderWidgetHostViewBase::FilterInputEvent(
 458     const blink::WebInputEvent& input_event) {
 459   // By default, input events are simply forwarded to the renderer.
 460   return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
 461 }
 462
 463 void RenderWidgetHostViewBase::OnSetNeedsFlushInput() {
 464   if (flush_input_timer_.IsRunning())
 465     return;
 466
 467   flush_input_timer_.Start(
 468       FROM_HERE,
 469       base::TimeDelta::FromMicroseconds(kFlushInputRateInUs),
 470       this,
 471       &RenderWidgetHostViewBase::FlushInput);
 472 }
 473
 474 void RenderWidgetHostViewBase::WheelEventAck(
 475     const blink::WebMouseWheelEvent& event,
 476     InputEventAckState ack_result) {
 477 }
 478
 479 void RenderWidgetHostViewBase::GestureEventAck(
 480     const blink::WebGestureEvent& event,
 481     InputEventAckState ack_result) {
 482 }
 483
 484 void RenderWidgetHostViewBase::SetPopupType(blink::WebPopupType popup_type) {
 485   popup_type_ = popup_type;
 486 }
 487
 488 blink::WebPopupType RenderWidgetHostViewBase::GetPopupType() {
 489   return popup_type_;
 490 }
 491
 492 BrowserAccessibilityManager*
 493 RenderWidgetHostViewBase::CreateBrowserAccessibilityManager(
 494     BrowserAccessibilityDelegate* delegate) {
 495   NOTREACHED();
 496   return NULL;
 497 }
 498
 499 void RenderWidgetHostViewBase::AccessibilityShowMenu(const gfx::Point& point) {
 500   RenderWidgetHostImpl* impl = NULL;
 501   if (GetRenderWidgetHost())
 502     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 503
 504   if (impl)
 505     impl->ShowContextMenuAtPoint(point);
 506 }
 507
 508 gfx::Point RenderWidgetHostViewBase::AccessibilityOriginInScreen(
 509     const gfx::Rect& bounds) {
 510   return bounds.origin();
 511 }
 512
 513 gfx::AcceleratedWidget
 514     RenderWidgetHostViewBase::AccessibilityGetAcceleratedWidget() {
 515   return gfx::kNullAcceleratedWidget;
 516 }
 517
 518 gfx::NativeViewAccessible
 519     RenderWidgetHostViewBase::AccessibilityGetNativeViewAccessible() {
 520   return NULL;
 521 }
 522
 523 void RenderWidgetHostViewBase::UpdateScreenInfo(gfx::NativeView view) {
 524   RenderWidgetHostImpl* impl = NULL;
 525   if (GetRenderWidgetHost())
 526     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 527
 528   if (impl)
 529     impl->SendScreenRects();
 530
 531   if (HasDisplayPropertyChanged(view) && impl)
 532     impl->NotifyScreenInfoChanged();
 533 }
 534
 535 bool RenderWidgetHostViewBase::HasDisplayPropertyChanged(gfx::NativeView view) {
 536   gfx::Display display =
 537       gfx::Screen::GetScreenFor(view)->GetDisplayNearestWindow(view);
 538   if (current_display_area_ == display.work_area() &&
 539       current_device_scale_factor_ == display.device_scale_factor() &&
 540       current_display_rotation_ == display.rotation()) {
 541     return false;
 542   }
 543
 544   current_display_area_ = display.work_area();
 545   current_device_scale_factor_ = display.device_scale_factor();
 546   current_display_rotation_ = display.rotation();
 547   return true;
 548 }
 549
 550 base::WeakPtr<RenderWidgetHostViewBase> RenderWidgetHostViewBase::GetWeakPtr() {
 551   return weak_factory_.GetWeakPtr();
 552 }
 553
 554 scoped_ptr<SyntheticGestureTarget>
 555 RenderWidgetHostViewBase::CreateSyntheticGestureTarget() {
 556   RenderWidgetHostImpl* host =
 557       RenderWidgetHostImpl::From(GetRenderWidgetHost());
 558   return scoped_ptr<SyntheticGestureTarget>(
 559       new SyntheticGestureTargetBase(host));
 560 }
 561
 562 // Platform implementation should override this method to allow frame
 563 // subscription. Frame subscriber is set to RenderProcessHost, which is
 564 // platform independent. It should be set to the specific presenter on each
 565 // platform.
 566 bool RenderWidgetHostViewBase::CanSubscribeFrame() const {
 567   NOTIMPLEMENTED();
 568   return false;
 569 }
 570
 571 // Base implementation for this method sets the subscriber to RenderProcessHost,
 572 // which is platform independent. Note: Implementation only support subscribing
 573 // to accelerated composited frames.
 574 void RenderWidgetHostViewBase::BeginFrameSubscription(
 575     scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) {
 576   RenderWidgetHostImpl* impl = NULL;
 577   if (GetRenderWidgetHost())
 578     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 579   if (!impl)
 580     return;
 581   RenderProcessHostImpl* render_process_host =
 582       static_cast<RenderProcessHostImpl*>(impl->GetProcess());
 583   render_process_host->BeginFrameSubscription(impl->GetRoutingID(),
 584                                               subscriber.Pass());
 585 }
 586
 587 void RenderWidgetHostViewBase::EndFrameSubscription() {
 588   RenderWidgetHostImpl* impl = NULL;
 589   if (GetRenderWidgetHost())
 590     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 591   if (!impl)
 592     return;
 593   RenderProcessHostImpl* render_process_host =
 594       static_cast<RenderProcessHostImpl*>(impl->GetProcess());
 595   render_process_host->EndFrameSubscription(impl->GetRoutingID());
 596 }
 597
 598 uint32 RenderWidgetHostViewBase::RendererFrameNumber() {
 599   return renderer_frame_number_;
 600 }
 601
 602 void RenderWidgetHostViewBase::DidReceiveRendererFrame() {
 603   ++renderer_frame_number_;
 604 }
 605
 606 void RenderWidgetHostViewBase::FlushInput() {
 607   RenderWidgetHostImpl* impl = NULL;
 608   if (GetRenderWidgetHost())
 609     impl = RenderWidgetHostImpl::From(GetRenderWidgetHost());
 610   if (!impl)
 611     return;
 612   impl->FlushInput();
 613 }
 614
 615 void RenderWidgetHostViewBase::OnTextSurroundingSelectionResponse(
 616     const base::string16& content,
 617     size_t start_offset,
 618     size_t end_offset) {
 619   NOTIMPLEMENTED();
 620 }
 621
 622 void RenderWidgetHostViewBase::ShowDisambiguationPopup(
 623     const gfx::Rect& rect_pixels,
 624     const SkBitmap& zoomed_bitmap) {
 625   NOTIMPLEMENTED();
 626 }
 627
 628 gfx::Size RenderWidgetHostViewBase::GetVisibleViewportSize() const {
 629   return GetViewBounds().size();
 630 }
 631
 632 void RenderWidgetHostViewBase::SetInsets(const gfx::Insets& insets) {
 633   NOTIMPLEMENTED();
 634 }
 635
 636 // static
 637 blink::WebScreenOrientationType
 638 RenderWidgetHostViewBase::GetOrientationTypeForMobile(
 639     const gfx::Display& display) {
 640   int angle = display.RotationAsDegree();
 641   const gfx::Rect& bounds = display.bounds();
 642
 643   // Whether the device's natural orientation is portrait.
 644   bool natural_portrait = false;
 645   if (angle == 0 || angle == 180) // The device is in its natural orientation.
 646     natural_portrait = bounds.height() >= bounds.width();
 647   else
 648     natural_portrait = bounds.height() <= bounds.width();
 649
 650   switch (angle) {
 651   case 0:
 652     return natural_portrait ? blink::WebScreenOrientationPortraitPrimary
 653                            : blink::WebScreenOrientationLandscapePrimary;
 654   case 90:
 655     return natural_portrait ? blink::WebScreenOrientationLandscapePrimary
 656                            : blink::WebScreenOrientationPortraitSecondary;
 657   case 180:
 658     return natural_portrait ? blink::WebScreenOrientationPortraitSecondary
 659                            : blink::WebScreenOrientationLandscapeSecondary;
 660   case 270:
 661     return natural_portrait ? blink::WebScreenOrientationLandscapeSecondary
 662                            : blink::WebScreenOrientationPortraitPrimary;
 663   default:
 664     NOTREACHED();
 665     return blink::WebScreenOrientationPortraitPrimary;
 666   }
 667 }
 668
 669 // static
 670 blink::WebScreenOrientationType
 671 RenderWidgetHostViewBase::GetOrientationTypeForDesktop(
 672     const gfx::Display& display) {
 673   static int primary_landscape_angle = -1;
 674   static int primary_portrait_angle = -1;
 675
 676   int angle = display.RotationAsDegree();
 677   const gfx::Rect& bounds = display.bounds();
 678   bool is_portrait = bounds.height() >= bounds.width();
 679
 680   if (is_portrait && primary_portrait_angle == -1)
 681     primary_portrait_angle = angle;
 682
 683   if (!is_portrait && primary_landscape_angle == -1)
 684     primary_landscape_angle = angle;
 685
 686   if (is_portrait) {
 687     return primary_portrait_angle == angle
 688         ? blink::WebScreenOrientationPortraitPrimary
 689         : blink::WebScreenOrientationPortraitSecondary;
 690   }
 691
 692   return primary_landscape_angle == angle
 693       ? blink::WebScreenOrientationLandscapePrimary
 694       : blink::WebScreenOrientationLandscapeSecondary;
 695 }
 696
 697 void RenderWidgetHostViewBase::OnDidNavigateMainFrameToNewPage() {
 698 }
 699
 700 uint32_t RenderWidgetHostViewBase::GetSurfaceIdNamespace() {
 701   return 0;
 702 }
 703
 704 }  // namespace content