Remove windowed NPAPI code

content/browser/renderer_host/render_widget_host_view_base.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/renderer_host/input/synthetic_gesture_target_base.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_delegate.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_base_observer.h"
 #include "content/common/content_switches_internal.h"
 #include "content/public/browser/render_widget_host_view_frame_subscriber.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/point_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/screen.h"
 
-#if defined(OS_WIN)
-#include "base/command_line.h"
-#include "base/message_loop/message_loop.h"
-#include "base/win/wrapped_window_proc.h"
-#include "content/browser/plugin_process_host.h"
-#include "content/browser/plugin_service_impl.h"
-#include "content/common/plugin_constants_win.h"
-#include "content/common/webplugin_geometry.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/child_process_data.h"
-#include "content/public/common/content_switches.h"
-#include "ui/gfx/gdi_util.h"
-#include "ui/gfx/win/dpi.h"
-#include "ui/gfx/win/hwnd_util.h"
-#endif
-
 namespace content {
 
-#if defined(OS_WIN)
-
-namespace {
-
-// |window| is the plugin HWND, created and destroyed in the plugin process.
-// |parent| is the parent HWND, created and destroyed on the browser UI thread.
-void NotifyPluginProcessHostHelper(HWND window, HWND parent, int tries) {
-  // How long to wait between each try.
-  static const int kTryDelayMs = 200;
-
-  DWORD plugin_process_id;
-  bool found_starting_plugin_process = false;
-  GetWindowThreadProcessId(window, &plugin_process_id);
-  for (PluginProcessHostIterator iter; !iter.Done(); ++iter) {
-    if (!iter.GetData().handle) {
-      found_starting_plugin_process = true;
-      continue;
-    }
-    if (base::GetProcId(iter.GetData().handle) == plugin_process_id) {
-      iter->AddWindow(parent);
-      return;
-    }
-  }
-
-  if (found_starting_plugin_process) {
-    // A plugin process has started but we don't have its handle yet.  Since
-    // it's most likely the one for this plugin, try a few more times after a
-    // delay.
-    if (tries > 0) {
-      base::MessageLoop::current()->PostDelayedTask(
-          FROM_HERE,
-          base::Bind(&NotifyPluginProcessHostHelper, window, parent, tries - 1),
-          base::TimeDelta::FromMilliseconds(kTryDelayMs));
-      return;
-    }
-  }
-
-  // The plugin process might have died in the time to execute the task, don't
-  // leak the HWND.
-  PostMessage(parent, WM_CLOSE, 0, 0);
-}
-
-// The plugin wrapper window which lives in the browser process has this proc
-// as its window procedure. We only handle the WM_PARENTNOTIFY message sent by
-// windowed plugins for mouse input. This is forwarded off to the wrappers
-// parent which is typically the RVH window which turns on user gesture.
-LRESULT CALLBACK PluginWrapperWindowProc(HWND window, unsigned int message,
-                                         WPARAM wparam, LPARAM lparam) {
-  if (message == WM_PARENTNOTIFY) {
-    switch (LOWORD(wparam)) {
-      case WM_LBUTTONDOWN:
-      case WM_RBUTTONDOWN:
-      case WM_MBUTTONDOWN:
-        ::SendMessage(GetParent(window), message, wparam, lparam);
-        return 0;
-      default:
-        break;
-    }
-  }
-  return ::DefWindowProc(window, message, wparam, lparam);
-}
-
-bool IsPluginWrapperWindow(HWND window) {
-  return gfx::GetClassNameW(window) ==
-      base::string16(kWrapperNativeWindowClassName);
-}
-
-// Create an intermediate window between the given HWND and its parent.
-HWND ReparentWindow(HWND window, HWND parent) {
-  static ATOM atom = 0;
-  static HMODULE instance = NULL;
-  if (!atom) {
-    WNDCLASSEX window_class;
-    base::win::InitializeWindowClass(
-        kWrapperNativeWindowClassName,
-        &base::win::WrappedWindowProc<PluginWrapperWindowProc>,
-        CS_DBLCLKS,
-        0,
-        0,
-        NULL,
-        // xxx reinterpret_cast<HBRUSH>(COLOR_WINDOW+1),
-        reinterpret_cast<HBRUSH>(COLOR_GRAYTEXT+1),
-        NULL,
-        NULL,
-        NULL,
-        &window_class);
-    instance = window_class.hInstance;
-    atom = RegisterClassEx(&window_class);
-  }
-  DCHECK(atom);
-
-  HWND new_parent = CreateWindowEx(
-      WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
-      MAKEINTATOM(atom), 0,
-      WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
-      0, 0, 0, 0, parent, 0, instance, 0);
-  gfx::CheckWindowCreated(new_parent);
-  ::SetParent(window, new_parent);
-  // How many times we try to find a PluginProcessHost whose process matches
-  // the HWND.
-  static const int kMaxTries = 5;
-  BrowserThread::PostTask(
-      BrowserThread::IO,
-      FROM_HERE,
-      base::Bind(&NotifyPluginProcessHostHelper, window, new_parent,
-                 kMaxTries));
-  return new_parent;
-}
-
-BOOL CALLBACK PaintEnumChildProc(HWND hwnd, LPARAM lparam) {
-  if (!PluginServiceImpl::GetInstance()->IsPluginWindow(hwnd))
-    return TRUE;
-
-  gfx::Rect* rect = reinterpret_cast<gfx::Rect*>(lparam);
-  gfx::Rect rect_in_pixels = gfx::win::DIPToScreenRect(*rect);
-  static UINT msg = RegisterWindowMessage(kPaintMessageName);
-  WPARAM wparam = MAKEWPARAM(rect_in_pixels.x(), rect_in_pixels.y());
-  lparam = MAKELPARAM(rect_in_pixels.width(), rect_in_pixels.height());
-
-  // SendMessage gets the message across much quicker than PostMessage, since it
-  // doesn't get queued.  When the plugin thread calls PeekMessage or other
-  // Win32 APIs, sent messages are dispatched automatically.
-  SendNotifyMessage(hwnd, msg, wparam, lparam);
-
-  return TRUE;
-}
-
-// Windows callback for OnDestroy to detach the plugin windows.
-BOOL CALLBACK DetachPluginWindowsCallbackInternal(HWND window, LPARAM param) {
-  RenderWidgetHostViewBase::DetachPluginWindowsCallback(window);
-  return TRUE;
-}
-
-}  // namespace
-
-// static
-void RenderWidgetHostViewBase::DetachPluginWindowsCallback(HWND window) {
-  if (PluginServiceImpl::GetInstance()->IsPluginWindow(window) &&
-      !IsHungAppWindow(window)) {
-    ::ShowWindow(window, SW_HIDE);
-    SetParent(window, NULL);
-  }
-}
-
-// static
-void RenderWidgetHostViewBase::MovePluginWindowsHelper(
-    HWND parent,
-    const std::vector<WebPluginGeometry>& moves) {
-  if (moves.empty())
-    return;
-
-  bool oop_plugins = !base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kSingleProcess);
-
-  HDWP defer_window_pos_info =
-      ::BeginDeferWindowPos(static_cast<int>(moves.size()));
-
-  if (!defer_window_pos_info) {
-    NOTREACHED();
-    return;
-  }
-
-#if defined(USE_AURA)
-  std::vector<RECT> invalidate_rects;
-#endif
-
-  for (size_t i = 0; i < moves.size(); ++i) {
-    unsigned long flags = 0;
-    const WebPluginGeometry& move = moves[i];
-    HWND window = move.window;
-
-    // As the plugin parent window which lives on the browser UI thread is
-    // destroyed asynchronously, it is possible that we have a stale window
-    // sent in by the renderer for moving around.
-    // Note: get the parent before checking if the window is valid, to avoid a
-    // race condition where the window is destroyed after the check but before
-    // the GetParent call.
-    HWND cur_parent = ::GetParent(window);
-    if (!::IsWindow(window))
-      continue;
-
-    if (!PluginServiceImpl::GetInstance()->IsPluginWindow(window)) {
-      // The renderer should only be trying to move plugin windows. However,
-      // this may happen as a result of a race condition (i.e. even after the
-      // check right above), so we ignore it.
-      continue;
-    }
-
-    if (oop_plugins) {
-      if (cur_parent == GetDesktopWindow()) {
-        // The plugin window hasn't been parented yet, add an intermediate
-        // window that lives on this thread to speed up scrolling. Note this
-        // only works with out of process plugins since we depend on
-        // PluginProcessHost to destroy the intermediate HWNDs.
-        cur_parent = ReparentWindow(window, parent);
-        ::ShowWindow(window, SW_SHOW);  // Window was created hidden.
-      } else if (!IsPluginWrapperWindow(cur_parent)) {
-        continue;  // Race if plugin process is shutting down.
-      }
-
-      // We move the intermediate parent window which doesn't result in cross-
-      // process synchronous Windows messages.
-      window = cur_parent;
-    } else {
-      if (cur_parent == GetDesktopWindow())
-        SetParent(window, parent);
-    }
-
-    if (move.visible)
-      flags |= SWP_SHOWWINDOW;
-    else
-      flags |= SWP_HIDEWINDOW;
-
-#if defined(USE_AURA)
-    if (GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
-      // Without this flag, Windows repaints the parent area uncovered by this
-      // move. However when software compositing is used the clipping region is
-      // ignored. Since in Aura the browser chrome could be under the plugin, if
-      // if Windows tries to paint it synchronously inside EndDeferWindowsPos
-      // then it won't have the data and it will flash white. So instead we
-      // manually redraw the plugin.
-      // Why not do this for native Windows? Not sure if there are any
-      // performance issues with this.
-      flags |= SWP_NOREDRAW;
-    }
-#endif
-
-    if (move.rects_valid) {
-      gfx::Rect clip_rect_in_pixel = gfx::win::DIPToScreenRect(move.clip_rect);
-      HRGN hrgn = ::CreateRectRgn(clip_rect_in_pixel.x(),
-                                  clip_rect_in_pixel.y(),
-                                  clip_rect_in_pixel.right(),
-                                  clip_rect_in_pixel.bottom());
-      gfx::SubtractRectanglesFromRegion(hrgn, move.cutout_rects);
-
-      // Note: System will own the hrgn after we call SetWindowRgn,
-      // so we don't need to call DeleteObject(hrgn)
-      ::SetWindowRgn(window, hrgn,
-                     !move.clip_rect.IsEmpty() && (flags & SWP_NOREDRAW) == 0);
-
-#if defined(USE_AURA)
-      // When using the software compositor, if the clipping rectangle is empty
-      // then DeferWindowPos won't redraw the newly uncovered area under the
-      // plugin.
-      if (clip_rect_in_pixel.IsEmpty() &&
-          !GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
-        RECT r;
-        GetClientRect(window, &r);
-        MapWindowPoints(window, parent, reinterpret_cast<POINT*>(&r), 2);
-        invalidate_rects.push_back(r);
-      }
-#endif
-    } else {
-      flags |= SWP_NOMOVE;
-      flags |= SWP_NOSIZE;
-    }
-
-    gfx::Rect window_rect_in_pixel =
-        gfx::win::DIPToScreenRect(move.window_rect);
-    defer_window_pos_info = ::DeferWindowPos(defer_window_pos_info,
-                                             window, NULL,
-                                             window_rect_in_pixel.x(),
-                                             window_rect_in_pixel.y(),
-                                             window_rect_in_pixel.width(),
-                                             window_rect_in_pixel.height(),
-                                             flags);
-
-    if (!defer_window_pos_info) {
-      DCHECK(false) << "DeferWindowPos failed, so all plugin moves ignored.";
-      return;
-    }
-  }
-
-  ::EndDeferWindowPos(defer_window_pos_info);
-
-#if defined(USE_AURA)
-  if (GpuDataManagerImpl::GetInstance()->CanUseGpuBrowserCompositor()) {
-    for (size_t i = 0; i < moves.size(); ++i) {
-      const WebPluginGeometry& move = moves[i];
-      RECT r;
-      GetWindowRect(move.window, &r);
-      gfx::Rect gr(r);
-      PaintEnumChildProc(move.window, reinterpret_cast<LPARAM>(&gr));
-    }
-  } else {
-      for (size_t i = 0; i < invalidate_rects.size(); ++i) {
-      ::RedrawWindow(
-          parent, &invalidate_rects[i], NULL,
-          // These flags are from WebPluginDelegateImpl::NativeWndProc.
-          RDW_INVALIDATE | RDW_ALLCHILDREN | RDW_FRAME | RDW_UPDATENOW);
-    }
-  }
-#endif
-}
-
-// static
-void RenderWidgetHostViewBase::PaintPluginWindowsHelper(
-    HWND parent, const gfx::Rect& damaged_screen_rect) {
-  LPARAM lparam = reinterpret_cast<LPARAM>(&damaged_screen_rect);
-  EnumChildWindows(parent, PaintEnumChildProc, lparam);
-}
-
-// static
-void RenderWidgetHostViewBase::DetachPluginsHelper(HWND parent) {
-  // When a tab is closed all its child plugin windows are destroyed
-  // automatically. This happens before plugins get any notification that its
-  // instances are tearing down.
-  //
-  // Plugins like Quicktime assume that their windows will remain valid as long
-  // as they have plugin instances active. Quicktime crashes in this case
-  // because its windowing code cleans up an internal data structure that the
-  // handler for NPP_DestroyStream relies on.
-  //
-  // The fix is to detach plugin windows from web contents when it is going
-  // away. This will prevent the plugin windows from getting destroyed
-  // automatically. The detached plugin windows will get cleaned up in proper
-  // sequence as part of the usual cleanup when the plugin instance goes away.
-  EnumChildWindows(parent, DetachPluginWindowsCallbackInternal, NULL);
-}
-
-#endif  // OS_WIN
-
 namespace {
 
 // How many microseconds apart input events should be flushed.
 const int kFlushInputRateInUs = 16666;
 
 }
 
 RenderWidgetHostViewBase::RenderWidgetHostViewBase()
     : popup_type_(blink::WebPopupTypeNone),
       background_color_(SK_ColorWHITE),
@@ skipping 354 matching lines @@
 void RenderWidgetHostViewBase::RemoveObserver(
     RenderWidgetHostViewBaseObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 cc::SurfaceId RenderWidgetHostViewBase::SurfaceIdForTesting() const {
   return cc::SurfaceId();
 }
 
 }  // namespace content