Index: content/child/npapi/webplugin_delegate_impl_win.cc |
diff --git a/content/child/npapi/webplugin_delegate_impl_win.cc b/content/child/npapi/webplugin_delegate_impl_win.cc |
index 70657052b54e87efceccbebca5a37be871eef25b..f0213e372fe732025ddf6865d1a32f39c85cf209 100644 |
--- a/content/child/npapi/webplugin_delegate_impl_win.cc |
+++ b/content/child/npapi/webplugin_delegate_impl_win.cc |
@@ -22,10 +22,13 @@ |
#include "base/strings/stringprintf.h" |
#include "base/synchronization/lock.h" |
#include "base/version.h" |
+#include "base/win/iat_patch_function.h" |
+#include "base/win/registry.h" |
#include "base/win/windows_version.h" |
#include "content/child/npapi/plugin_instance.h" |
#include "content/child/npapi/plugin_lib.h" |
#include "content/child/npapi/webplugin.h" |
+#include "content/child/npapi/webplugin_ime_win.h" |
#include "content/common/cursors/webcursor.h" |
#include "content/common/plugin_constants_win.h" |
#include "content/public/common/content_constants.h" |
@@ -41,6 +44,47 @@ |
namespace content { |
namespace { |
+ |
+const wchar_t kWebPluginDelegateProperty[] = L"WebPluginDelegateProperty"; |
+ |
+// The fastest we are willing to process WM_USER+1 events for Flash. |
+// Flash can easily exceed the limits of our CPU if we don't throttle it. |
+// The throttle has been chosen by testing various delays and compromising |
+// on acceptable Flash performance and reasonable CPU consumption. |
+// |
+// I'd like to make the throttle delay variable, based on the amount of |
+// time currently required to paint Flash plugins. There isn't a good |
+// way to count the time spent in aggregate plugin painting, however, so |
+// this seems to work well enough. |
+const int kFlashWMUSERMessageThrottleDelayMs = 5; |
+ |
+// The current instance of the plugin which entered the modal loop. |
+WebPluginDelegateImpl* g_current_plugin_instance = NULL; |
+ |
+typedef std::deque<MSG> ThrottleQueue; |
+base::LazyInstance<ThrottleQueue> g_throttle_queue = LAZY_INSTANCE_INITIALIZER; |
+ |
+base::LazyInstance<std::map<HWND, WNDPROC> > g_window_handle_proc_map = |
+ LAZY_INSTANCE_INITIALIZER; |
+ |
+// Helper object for patching the TrackPopupMenu API. |
+base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_track_popup_menu = |
+ LAZY_INSTANCE_INITIALIZER; |
+ |
+// Helper object for patching the SetCursor API. |
+base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_set_cursor = |
+ LAZY_INSTANCE_INITIALIZER; |
+ |
+// Helper object for patching the RegEnumKeyExW API. |
+base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_reg_enum_key_ex_w = |
+ LAZY_INSTANCE_INITIALIZER; |
+ |
+// Helper object for patching the GetProcAddress API. |
+base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_get_proc_address = |
+ LAZY_INSTANCE_INITIALIZER; |
+ |
+base::LazyInstance<base::win::IATPatchFunction> g_iat_patch_window_from_point = |
+ LAZY_INSTANCE_INITIALIZER; |
// http://crbug.com/16114 |
// Enforces providing a valid device context in NPWindow, so that NPP_SetWindow |
@@ -74,13 +118,104 @@ |
bool disposable_dc_; |
}; |
+// These are from ntddk.h |
+typedef LONG NTSTATUS; |
+ |
+#ifndef STATUS_SUCCESS |
+#define STATUS_SUCCESS ((NTSTATUS)0x00000000L) |
+#endif |
+ |
+#ifndef STATUS_BUFFER_TOO_SMALL |
+#define STATUS_BUFFER_TOO_SMALL ((NTSTATUS)0xC0000023L) |
+#endif |
+ |
+typedef enum _KEY_INFORMATION_CLASS { |
+ KeyBasicInformation, |
+ KeyNodeInformation, |
+ KeyFullInformation, |
+ KeyNameInformation, |
+ KeyCachedInformation, |
+ KeyVirtualizationInformation |
+} KEY_INFORMATION_CLASS; |
+ |
+typedef struct _KEY_NAME_INFORMATION { |
+ ULONG NameLength; |
+ WCHAR Name[1]; |
+} KEY_NAME_INFORMATION, *PKEY_NAME_INFORMATION; |
+ |
+typedef DWORD (__stdcall *ZwQueryKeyType)( |
+ HANDLE key_handle, |
+ int key_information_class, |
+ PVOID key_information, |
+ ULONG length, |
+ PULONG result_length); |
+ |
+// Returns a key's full path. |
+std::wstring GetKeyPath(HKEY key) { |
+ if (key == NULL) |
+ return L""; |
+ |
+ HMODULE dll = GetModuleHandle(L"ntdll.dll"); |
+ if (dll == NULL) |
+ return L""; |
+ |
+ ZwQueryKeyType func = reinterpret_cast<ZwQueryKeyType>( |
+ ::GetProcAddress(dll, "ZwQueryKey")); |
+ if (func == NULL) |
+ return L""; |
+ |
+ DWORD size = 0; |
+ DWORD result = 0; |
+ result = func(key, KeyNameInformation, 0, 0, &size); |
+ if (result != static_cast<DWORD>(STATUS_BUFFER_TOO_SMALL)) |
+ return L""; |
+ |
+ scoped_ptr<char[]> buffer(new char[size]); |
+ if (buffer.get() == NULL) |
+ return L""; |
+ |
+ result = func(key, KeyNameInformation, buffer.get(), size, &size); |
+ if (result != static_cast<DWORD>(STATUS_SUCCESS)) |
+ return L""; |
+ |
+ KEY_NAME_INFORMATION* info = |
+ reinterpret_cast<KEY_NAME_INFORMATION*>(buffer.get()); |
+ return std::wstring(info->Name, info->NameLength / sizeof(wchar_t)); |
+} |
+ |
+uint32_t GetPluginMajorVersion(const WebPluginInfo& plugin_info) { |
+ Version plugin_version; |
+ WebPluginInfo::CreateVersionFromString(plugin_info.version, &plugin_version); |
+ |
+ uint32_t major_version = 0; |
+ if (plugin_version.IsValid()) |
+ major_version = plugin_version.components()[0]; |
+ |
+ return major_version; |
+} |
+ |
} // namespace |
+ |
+LRESULT CALLBACK WebPluginDelegateImpl::HandleEventMessageFilterHook( |
+ int code, WPARAM wParam, LPARAM lParam) { |
+ if (g_current_plugin_instance) { |
+ g_current_plugin_instance->OnModalLoopEntered(); |
+ } else { |
+ NOTREACHED(); |
+ } |
+ return CallNextHookEx(NULL, code, wParam, lParam); |
+} |
WebPluginDelegateImpl::WebPluginDelegateImpl(WebPlugin* plugin, |
PluginInstance* instance) |
: plugin_(plugin), |
instance_(instance), |
quirks_(0), |
+ dummy_window_for_activation_(NULL), |
+ dummy_window_parent_(NULL), |
+ old_dummy_window_proc_(NULL), |
+ handle_event_message_filter_hook_(NULL), |
+ handle_event_pump_messages_event_(NULL), |
handle_event_depth_(0), |
first_set_window_call_(true), |
plugin_has_focus_(false), |
@@ -89,17 +224,182 @@ |
creation_succeeded_(false), |
user_gesture_msg_factory_(this) { |
memset(&window_, 0, sizeof(window_)); |
+ |
+ const WebPluginInfo& plugin_info = instance_->plugin_lib()->plugin_info(); |
+ base::string16 filename = |
+ base::ToLowerASCII(plugin_info.path.BaseName().value()); |
+ |
+ if (instance_->mime_type() == kFlashPluginSwfMimeType || |
+ filename == kFlashPlugin) { |
+ // Flash only requests windowless plugins if we return a Mozilla user |
+ // agent. |
+ instance_->set_use_mozilla_user_agent(); |
+ quirks_ |= PLUGIN_QUIRK_THROTTLE_WM_USER_PLUS_ONE; |
+ quirks_ |= PLUGIN_QUIRK_PATCH_SETCURSOR; |
+ quirks_ |= PLUGIN_QUIRK_ALWAYS_NOTIFY_SUCCESS; |
+ quirks_ |= PLUGIN_QUIRK_HANDLE_MOUSE_CAPTURE; |
+ quirks_ |= PLUGIN_QUIRK_EMULATE_IME; |
+ quirks_ |= PLUGIN_QUIRK_FAKE_WINDOW_FROM_POINT; |
+ } else if (filename == kAcrobatReaderPlugin) { |
+ // Check for the version number above or equal 9. |
+ uint32_t major_version = GetPluginMajorVersion(plugin_info); |
+ if (major_version >= 9) { |
+ quirks_ |= PLUGIN_QUIRK_DIE_AFTER_UNLOAD; |
+ // 9.2 needs this. |
+ quirks_ |= PLUGIN_QUIRK_SETWINDOW_TWICE; |
+ } |
+ quirks_ |= PLUGIN_QUIRK_BLOCK_NONSTANDARD_GETURL_REQUESTS; |
+ } else if (plugin_info.name.find(L"Windows Media Player") != |
+ std::wstring::npos) { |
+ // Windows Media Player needs two NPP_SetWindow calls. |
+ quirks_ |= PLUGIN_QUIRK_SETWINDOW_TWICE; |
+ |
+ // Windowless mode doesn't work in the WMP NPAPI plugin. |
+ quirks_ |= PLUGIN_QUIRK_NO_WINDOWLESS; |
+ |
+ // The media player plugin sets its size on the first NPP_SetWindow call |
+ // and never updates its size. We should call the underlying NPP_SetWindow |
+ // only when we have the correct size. |
+ quirks_ |= PLUGIN_QUIRK_IGNORE_FIRST_SETWINDOW_CALL; |
+ |
+ if (filename == kOldWMPPlugin) { |
+ // Non-admin users on XP couldn't modify the key to force the new UI. |
+ quirks_ |= PLUGIN_QUIRK_PATCH_REGENUMKEYEXW; |
+ } |
+ } else if (instance_->mime_type() == "audio/x-pn-realaudio-plugin" || |
+ filename == kRealPlayerPlugin) { |
+ quirks_ |= PLUGIN_QUIRK_DONT_CALL_WND_PROC_RECURSIVELY; |
+ } else if (plugin_info.name.find(L"VLC Multimedia Plugin") != |
+ std::wstring::npos || |
+ plugin_info.name.find(L"VLC Multimedia Plug-in") != |
+ std::wstring::npos) { |
+ // VLC hangs on NPP_Destroy if we call NPP_SetWindow with a null window |
+ // handle |
+ quirks_ |= PLUGIN_QUIRK_DONT_SET_NULL_WINDOW_HANDLE_ON_DESTROY; |
+ uint32_t major_version = GetPluginMajorVersion(plugin_info); |
+ if (major_version == 0) { |
+ // VLC 0.8.6d and 0.8.6e crash if multiple instances are created. |
+ quirks_ |= PLUGIN_QUIRK_DONT_ALLOW_MULTIPLE_INSTANCES; |
+ } |
+ } else if (filename == kSilverlightPlugin) { |
+ // Explanation for this quirk can be found in |
+ // WebPluginDelegateImpl::Initialize. |
+ quirks_ |= PLUGIN_QUIRK_PATCH_SETCURSOR; |
+ } else if (plugin_info.name.find(L"DivX Web Player") != |
+ std::wstring::npos) { |
+ // The divx plugin sets its size on the first NPP_SetWindow call and never |
+ // updates its size. We should call the underlying NPP_SetWindow only when |
+ // we have the correct size. |
+ quirks_ |= PLUGIN_QUIRK_IGNORE_FIRST_SETWINDOW_CALL; |
+ } |
} |
WebPluginDelegateImpl::~WebPluginDelegateImpl() { |
+ if (::IsWindow(dummy_window_for_activation_)) { |
+ WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>( |
+ GetWindowLongPtr(dummy_window_for_activation_, GWLP_WNDPROC)); |
+ if (current_wnd_proc == DummyWindowProc) { |
+ SetWindowLongPtr(dummy_window_for_activation_, |
+ GWLP_WNDPROC, |
+ reinterpret_cast<LONG_PTR>(old_dummy_window_proc_)); |
+ } |
+ ::DestroyWindow(dummy_window_for_activation_); |
+ } |
+ |
DestroyInstance(); |
+ |
+ if (handle_event_pump_messages_event_) { |
+ CloseHandle(handle_event_pump_messages_event_); |
+ } |
} |
bool WebPluginDelegateImpl::PlatformInitialize() { |
+ CreateDummyWindowForActivation(); |
+ handle_event_pump_messages_event_ = CreateEvent(NULL, TRUE, FALSE, NULL); |
+ plugin_->SetWindowlessData( |
+ handle_event_pump_messages_event_, |
+ reinterpret_cast<gfx::NativeViewId>(dummy_window_for_activation_)); |
+ |
+ // Windowless plugins call the WindowFromPoint API and passes the result of |
+ // that to the TrackPopupMenu API call as the owner window. This causes the |
+ // API to fail as the API expects the window handle to live on the same |
+ // thread as the caller. It works in the other browsers as the plugin lives |
+ // on the browser thread. Our workaround is to intercept the TrackPopupMenu |
+ // API and replace the window handle with the dummy activation window. |
+ if (!g_iat_patch_track_popup_menu.Pointer()->is_patched()) { |
+ g_iat_patch_track_popup_menu.Pointer()->Patch( |
+ GetPluginPath().value().c_str(), "user32.dll", "TrackPopupMenu", |
+ WebPluginDelegateImpl::TrackPopupMenuPatch); |
+ } |
+ |
+ // Windowless plugins can set cursors by calling the SetCursor API. This |
+ // works because the thread inputs of the browser UI thread and the plugin |
+ // thread are attached. We intercept the SetCursor API for windowless |
+ // plugins and remember the cursor being set. This is shipped over to the |
+ // browser in the HandleEvent call, which ensures that the cursor does not |
+ // change when a windowless plugin instance changes the cursor |
+ // in a background tab. |
+ if (!g_iat_patch_set_cursor.Pointer()->is_patched() && |
+ (quirks_ & PLUGIN_QUIRK_PATCH_SETCURSOR)) { |
+ g_iat_patch_set_cursor.Pointer()->Patch( |
+ GetPluginPath().value().c_str(), "user32.dll", "SetCursor", |
+ WebPluginDelegateImpl::SetCursorPatch); |
+ } |
+ |
+ // On XP, WMP will use its old UI unless a registry key under HKLM has the |
+ // name of the current process. We do it in the installer for admin users, |
+ // for the rest patch this function. |
+ if ((quirks_ & PLUGIN_QUIRK_PATCH_REGENUMKEYEXW) && |
+ base::win::GetVersion() == base::win::VERSION_XP && |
+ (base::win::RegKey().Open(HKEY_LOCAL_MACHINE, |
+ L"SOFTWARE\\Microsoft\\MediaPlayer\\ShimInclusionList\\chrome.exe", |
+ KEY_READ) != ERROR_SUCCESS) && |
+ !g_iat_patch_reg_enum_key_ex_w.Pointer()->is_patched()) { |
+ g_iat_patch_reg_enum_key_ex_w.Pointer()->Patch( |
+ L"wmpdxm.dll", "advapi32.dll", "RegEnumKeyExW", |
+ WebPluginDelegateImpl::RegEnumKeyExWPatch); |
+ } |
+ |
+ // Flash retrieves the pointers to IMM32 functions with GetProcAddress() calls |
+ // and use them to retrieve IME data. We add a patch to this function so we |
+ // can dispatch these IMM32 calls to the WebPluginIMEWin class, which emulates |
+ // IMM32 functions for Flash. |
+ if (!g_iat_patch_get_proc_address.Pointer()->is_patched() && |
+ (quirks_ & PLUGIN_QUIRK_EMULATE_IME)) { |
+ g_iat_patch_get_proc_address.Pointer()->Patch( |
+ GetPluginPath().value().c_str(), "kernel32.dll", "GetProcAddress", |
+ GetProcAddressPatch); |
+ } |
+ |
+ if (!g_iat_patch_window_from_point.Pointer()->is_patched() && |
+ (quirks_ & PLUGIN_QUIRK_FAKE_WINDOW_FROM_POINT)) { |
+ g_iat_patch_window_from_point.Pointer()->Patch( |
+ GetPluginPath().value().c_str(), "user32.dll", "WindowFromPoint", |
+ WebPluginDelegateImpl::WindowFromPointPatch); |
+ } |
+ |
return true; |
} |
void WebPluginDelegateImpl::PlatformDestroyInstance() { |
+ if (!instance_->plugin_lib()) |
+ return; |
+ |
+ // Unpatch if this is the last plugin instance. |
+ if (instance_->plugin_lib()->instance_count() != 1) |
+ return; |
+ |
+ if (g_iat_patch_set_cursor.Pointer()->is_patched()) |
+ g_iat_patch_set_cursor.Pointer()->Unpatch(); |
+ |
+ if (g_iat_patch_track_popup_menu.Pointer()->is_patched()) |
+ g_iat_patch_track_popup_menu.Pointer()->Unpatch(); |
+ |
+ if (g_iat_patch_reg_enum_key_ex_w.Pointer()->is_patched()) |
+ g_iat_patch_reg_enum_key_ex_w.Pointer()->Unpatch(); |
+ |
+ if (g_iat_patch_window_from_point.Pointer()->is_patched()) |
+ g_iat_patch_window_from_point.Pointer()->Unpatch(); |
} |
void WebPluginDelegateImpl::Paint(SkCanvas* canvas, const gfx::Rect& rect) { |
@@ -108,6 +408,234 @@ |
HDC hdc = scoped_platform_paint.GetPlatformSurface(); |
WindowlessPaint(hdc, rect); |
} |
+} |
+ |
+// Erase all messages in the queue destined for a particular window. |
+// When windows are closing, callers should use this function to clear |
+// the queue. |
+// static |
+void WebPluginDelegateImpl::ClearThrottleQueueForWindow(HWND window) { |
+ ThrottleQueue* throttle_queue = g_throttle_queue.Pointer(); |
+ |
+ ThrottleQueue::iterator it; |
+ for (it = throttle_queue->begin(); it != throttle_queue->end(); ) { |
+ if (it->hwnd == window) { |
+ it = throttle_queue->erase(it); |
+ } else { |
+ it++; |
+ } |
+ } |
+} |
+ |
+// Delayed callback for processing throttled messages. |
+// Throttled messages are aggregated globally across all plugins. |
+// static |
+void WebPluginDelegateImpl::OnThrottleMessage() { |
+ // The current algorithm walks the list and processes the first |
+ // message it finds for each plugin. It is important to service |
+ // all active plugins with each pass through the throttle, otherwise |
+ // we see video jankiness. Copy the set to notify before notifying |
+ // since we may re-enter OnThrottleMessage from CallWindowProc! |
+ ThrottleQueue* throttle_queue = g_throttle_queue.Pointer(); |
+ ThrottleQueue notify_queue; |
+ std::set<HWND> processed; |
+ |
+ ThrottleQueue::iterator it = throttle_queue->begin(); |
+ while (it != throttle_queue->end()) { |
+ const MSG& msg = *it; |
+ if (processed.find(msg.hwnd) == processed.end()) { |
+ processed.insert(msg.hwnd); |
+ notify_queue.push_back(msg); |
+ it = throttle_queue->erase(it); |
+ } else { |
+ it++; |
+ } |
+ } |
+ |
+ // Due to re-entrancy, we must save our queue state now. Otherwise, we may |
+ // self-post below, and *also* start up another delayed task when the first |
+ // entry is pushed onto the queue in ThrottleMessage(). |
+ bool throttle_queue_was_empty = throttle_queue->empty(); |
+ |
+ for (it = notify_queue.begin(); it != notify_queue.end(); ++it) { |
+ const MSG& msg = *it; |
+ WNDPROC proc = reinterpret_cast<WNDPROC>(msg.time); |
+ // It is possible that the window was closed after we queued |
+ // this message. This is a rare event; just verify the window |
+ // is alive. (see also bug 1259488) |
+ if (IsWindow(msg.hwnd)) |
+ CallWindowProc(proc, msg.hwnd, msg.message, msg.wParam, msg.lParam); |
+ } |
+ |
+ if (!throttle_queue_was_empty) { |
+ base::MessageLoop::current()->PostDelayedTask( |
+ FROM_HERE, |
+ base::Bind(&WebPluginDelegateImpl::OnThrottleMessage), |
+ base::TimeDelta::FromMilliseconds(kFlashWMUSERMessageThrottleDelayMs)); |
+ } |
+} |
+ |
+// Schedule a windows message for delivery later. |
+// static |
+void WebPluginDelegateImpl::ThrottleMessage(WNDPROC proc, HWND hwnd, |
+ UINT message, WPARAM wParam, |
+ LPARAM lParam) { |
+ MSG msg; |
+ // Cast through uintptr_t and then DWORD to make the truncation explicit. |
+ msg.time = static_cast<DWORD>(reinterpret_cast<uintptr_t>(proc)); |
+ msg.hwnd = hwnd; |
+ msg.message = message; |
+ msg.wParam = wParam; |
+ msg.lParam = lParam; |
+ |
+ ThrottleQueue* throttle_queue = g_throttle_queue.Pointer(); |
+ |
+ throttle_queue->push_back(msg); |
+ |
+ if (throttle_queue->size() == 1) { |
+ base::MessageLoop::current()->PostDelayedTask( |
+ FROM_HERE, |
+ base::Bind(&WebPluginDelegateImpl::OnThrottleMessage), |
+ base::TimeDelta::FromMilliseconds(kFlashWMUSERMessageThrottleDelayMs)); |
+ } |
+} |
+ |
+// We go out of our way to find the hidden windows created by Flash for |
+// windowless plugins. We throttle the rate at which they deliver messages |
+// so that they will not consume outrageous amounts of CPU. |
+// static |
+LRESULT CALLBACK WebPluginDelegateImpl::FlashWindowlessWndProc( |
+ HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) { |
+ std::map<HWND, WNDPROC>::iterator index = |
+ g_window_handle_proc_map.Get().find(hwnd); |
+ |
+ WNDPROC old_proc = (*index).second; |
+ DCHECK(old_proc); |
+ |
+ switch (message) { |
+ case WM_NCDESTROY: { |
+ WebPluginDelegateImpl::ClearThrottleQueueForWindow(hwnd); |
+ g_window_handle_proc_map.Get().erase(index); |
+ break; |
+ } |
+ // Flash may flood the message queue with WM_USER+1 message causing 100% CPU |
+ // usage. See https://bugzilla.mozilla.org/show_bug.cgi?id=132759. We |
+ // prevent this by throttling the messages. |
+ case WM_USER + 1: { |
+ WebPluginDelegateImpl::ThrottleMessage(old_proc, hwnd, message, wparam, |
+ lparam); |
+ return TRUE; |
+ } |
+ |
+ default: { |
+ break; |
+ } |
+ } |
+ return CallWindowProc(old_proc, hwnd, message, wparam, lparam); |
+} |
+ |
+LRESULT CALLBACK WebPluginDelegateImpl::DummyWindowProc( |
+ HWND hwnd, UINT message, WPARAM w_param, LPARAM l_param) { |
+ WebPluginDelegateImpl* delegate = reinterpret_cast<WebPluginDelegateImpl*>( |
+ GetProp(hwnd, kWebPluginDelegateProperty)); |
+ CHECK(delegate); |
+ if (message == WM_WINDOWPOSCHANGING) { |
+ // We need to know when the dummy window is parented because windowless |
+ // plugins need the parent window for things like menus. There's no message |
+ // for a parent being changed, but a WM_WINDOWPOSCHANGING is sent so we |
+ // check every time we get it. |
+ // For non-aura builds, this never changes since RenderWidgetHostViewWin's |
+ // window is constant. For aura builds, this changes every time the tab gets |
+ // dragged to a new window. |
+ HWND parent = GetParent(hwnd); |
+ if (parent != delegate->dummy_window_parent_) { |
+ delegate->dummy_window_parent_ = parent; |
+ |
+ // Set the containing window handle as the instance window handle. This is |
+ // what Safari does. Not having a valid window handle causes subtle bugs |
+ // with plugins which retrieve the window handle and use it for things |
+ // like context menus. The window handle can be retrieved via |
+ // NPN_GetValue of NPNVnetscapeWindow. |
+ delegate->instance_->set_window_handle(parent); |
+ |
+ // The plugin caches the result of NPNVnetscapeWindow when we originally |
+ // called NPP_SetWindow, so force it to get the new value. |
+ delegate->WindowlessSetWindow(); |
+ } |
+ } else if (message == WM_NCDESTROY) { |
+ RemoveProp(hwnd, kWebPluginDelegateProperty); |
+ } |
+ return CallWindowProc( |
+ delegate->old_dummy_window_proc_, hwnd, message, w_param, l_param); |
+} |
+ |
+// Callback for enumerating the Flash windows. |
+BOOL CALLBACK EnumFlashWindows(HWND window, LPARAM arg) { |
+ WNDPROC wnd_proc = reinterpret_cast<WNDPROC>(arg); |
+ TCHAR class_name[1024]; |
+ if (!RealGetWindowClass(window, class_name, |
+ sizeof(class_name)/sizeof(TCHAR))) { |
+ LOG(ERROR) << "RealGetWindowClass failure: " << GetLastError(); |
+ return FALSE; |
+ } |
+ |
+ if (wcscmp(class_name, L"SWFlash_PlaceholderX")) |
+ return TRUE; |
+ |
+ WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>( |
+ GetWindowLongPtr(window, GWLP_WNDPROC)); |
+ if (current_wnd_proc != wnd_proc) { |
+ WNDPROC old_flash_proc = reinterpret_cast<WNDPROC>(SetWindowLongPtr( |
+ window, GWLP_WNDPROC, |
+ reinterpret_cast<LONG_PTR>(wnd_proc))); |
+ DCHECK(old_flash_proc); |
+ g_window_handle_proc_map.Get()[window] = old_flash_proc; |
+ } |
+ |
+ return TRUE; |
+} |
+ |
+bool WebPluginDelegateImpl::CreateDummyWindowForActivation() { |
+ DCHECK(!dummy_window_for_activation_); |
+ |
+ dummy_window_for_activation_ = CreateWindowEx( |
+ 0, |
+ L"Static", |
+ kDummyActivationWindowName, |
+ WS_CHILD, |
+ 0, |
+ 0, |
+ 0, |
+ 0, |
+ // We don't know the parent of the dummy window yet, so just set it to the |
+ // desktop and it'll get parented by the browser. |
+ GetDesktopWindow(), |
+ 0, |
+ GetModuleHandle(NULL), |
+ 0); |
+ |
+ if (dummy_window_for_activation_ == 0) |
+ return false; |
+ |
+ BOOL result = SetProp(dummy_window_for_activation_, |
+ kWebPluginDelegateProperty, this); |
+ DCHECK(result == TRUE) << "SetProp failed, last error = " << GetLastError(); |
+ old_dummy_window_proc_ = reinterpret_cast<WNDPROC>(SetWindowLongPtr( |
+ dummy_window_for_activation_, GWLP_WNDPROC, |
+ reinterpret_cast<LONG_PTR>(DummyWindowProc))); |
+ |
+ // Flash creates background windows which use excessive CPU in our |
+ // environment; we wrap these windows and throttle them so that they don't |
+ // get out of hand. |
+ if (!EnumThreadWindows(::GetCurrentThreadId(), EnumFlashWindows, |
+ reinterpret_cast<LPARAM>( |
+ &WebPluginDelegateImpl::FlashWindowlessWndProc))) { |
+ // Log that this happened. Flash will still work; it just means the |
+ // throttle isn't installed (and Flash will use more CPU). |
+ NOTREACHED(); |
+ LOG(ERROR) << "Failed to wrap all windowless Flash windows"; |
+ } |
+ return true; |
} |
// Returns true if the message passed in corresponds to a user gesture. |
@@ -332,6 +860,51 @@ |
return false; |
} |
+ // Allow this plugin to access this IME emulator through IMM32 API while the |
+ // plugin is processing this event. |
+ if (GetQuirks() & PLUGIN_QUIRK_EMULATE_IME) { |
+ if (!plugin_ime_) |
+ plugin_ime_.reset(new WebPluginIMEWin); |
+ } |
+ WebPluginIMEWin::ScopedLock lock( |
+ event.isKeyboardEventType(event.type) ? plugin_ime_.get() : NULL); |
+ |
+ HWND last_focus_window = NULL; |
+ |
+ if (ShouldTrackEventForModalLoops(&np_event)) { |
+ // A windowless plugin can enter a modal loop in a NPP_HandleEvent call. |
+ // For e.g. Flash puts up a context menu when we right click on the |
+ // windowless plugin area. We detect this by setting up a message filter |
+ // hook pror to calling NPP_HandleEvent on the plugin and unhook on |
+ // return from NPP_HandleEvent. If the plugin does enter a modal loop |
+ // in that context we unhook on receiving the first notification in |
+ // the message filter hook. |
+ handle_event_message_filter_hook_ = |
+ SetWindowsHookEx(WH_MSGFILTER, HandleEventMessageFilterHook, NULL, |
+ GetCurrentThreadId()); |
+ // To ensure that the plugin receives keyboard events we set focus to the |
+ // dummy window. |
+ // TODO(iyengar) We need a framework in the renderer to identify which |
+ // windowless plugin is under the mouse and to handle this. This would |
+ // also require some changes in RenderWidgetHost to detect this in the |
+ // WM_MOUSEACTIVATE handler and inform the renderer accordingly. |
+ bool valid = GetParent(dummy_window_for_activation_) != GetDesktopWindow(); |
+ if (valid) { |
+ last_focus_window = ::SetFocus(dummy_window_for_activation_); |
+ } else { |
+ NOTREACHED() << "Dummy window not parented"; |
+ } |
+ } |
+ |
+ bool old_task_reentrancy_state = |
+ base::MessageLoop::current()->NestableTasksAllowed(); |
+ |
+ // Maintain a local/global stack for the g_current_plugin_instance variable |
+ // as this may be a nested invocation. |
+ WebPluginDelegateImpl* last_plugin_instance = g_current_plugin_instance; |
+ |
+ g_current_plugin_instance = this; |
+ |
handle_event_depth_++; |
bool popups_enabled = false; |
@@ -363,7 +936,174 @@ |
handle_event_depth_--; |
+ g_current_plugin_instance = last_plugin_instance; |
+ |
+ // We could have multiple NPP_HandleEvent calls nested together in case |
+ // the plugin enters a modal loop. Reset the pump messages event when |
+ // the outermost NPP_HandleEvent call unwinds. |
+ if (handle_event_depth_ == 0) { |
+ ResetEvent(handle_event_pump_messages_event_); |
+ } |
+ |
+ // If we didn't enter a modal loop, need to unhook the filter. |
+ if (handle_event_message_filter_hook_) { |
+ UnhookWindowsHookEx(handle_event_message_filter_hook_); |
+ handle_event_message_filter_hook_ = NULL; |
+ } |
+ |
+ if (::IsWindow(last_focus_window)) { |
+ // Restore the nestable tasks allowed state in the message loop and reset |
+ // the os modal loop state as the plugin returned from the TrackPopupMenu |
+ // API call. |
+ base::MessageLoop::current()->SetNestableTasksAllowed( |
+ old_task_reentrancy_state); |
+ base::MessageLoop::current()->set_os_modal_loop(false); |
+ // The Flash plugin at times sets focus to its hidden top level window |
+ // with class name SWFlash_PlaceholderX. This causes the chrome browser |
+ // window to receive a WM_ACTIVATEAPP message as a top level window from |
+ // another thread is now active. We end up in a state where the chrome |
+ // browser window is not active even though the user clicked on it. |
+ // Our workaround for this is to send over a raw |
+ // WM_LBUTTONDOWN/WM_LBUTTONUP combination to the last focus window, which |
+ // does the trick. |
+ if (dummy_window_for_activation_ != ::GetFocus()) { |
+ INPUT input_info = {0}; |
+ input_info.type = INPUT_MOUSE; |
+ input_info.mi.dwFlags = MOUSEEVENTF_LEFTDOWN; |
+ ::SendInput(1, &input_info, sizeof(INPUT)); |
+ |
+ input_info.type = INPUT_MOUSE; |
+ input_info.mi.dwFlags = MOUSEEVENTF_LEFTUP; |
+ ::SendInput(1, &input_info, sizeof(INPUT)); |
+ } else { |
+ ::SetFocus(last_focus_window); |
+ } |
+ } |
return ret; |
} |
+ |
+void WebPluginDelegateImpl::OnModalLoopEntered() { |
+ DCHECK(handle_event_pump_messages_event_ != NULL); |
+ SetEvent(handle_event_pump_messages_event_); |
+ |
+ base::MessageLoop::current()->SetNestableTasksAllowed(true); |
+ base::MessageLoop::current()->set_os_modal_loop(true); |
+ |
+ UnhookWindowsHookEx(handle_event_message_filter_hook_); |
+ handle_event_message_filter_hook_ = NULL; |
+} |
+ |
+bool WebPluginDelegateImpl::ShouldTrackEventForModalLoops(NPEvent* event) { |
+ if (event->event == WM_RBUTTONDOWN) |
+ return true; |
+ return false; |
+} |
+ |
+BOOL WINAPI WebPluginDelegateImpl::TrackPopupMenuPatch( |
+ HMENU menu, unsigned int flags, int x, int y, int reserved, |
+ HWND window, const RECT* rect) { |
+ |
+ if (g_current_plugin_instance) { |
+ unsigned long window_process_id = 0; |
+ unsigned long window_thread_id = |
+ GetWindowThreadProcessId(window, &window_process_id); |
+ // TrackPopupMenu fails if the window passed in belongs to a different |
+ // thread. |
+ if (::GetCurrentThreadId() != window_thread_id) { |
+ bool valid = |
+ GetParent(g_current_plugin_instance->dummy_window_for_activation_) != |
+ GetDesktopWindow(); |
+ if (valid) { |
+ window = g_current_plugin_instance->dummy_window_for_activation_; |
+ } else { |
+ NOTREACHED() << "Dummy window not parented"; |
+ } |
+ } |
+ } |
+ |
+ BOOL result = TrackPopupMenu(menu, flags, x, y, reserved, window, rect); |
+ return result; |
+} |
+ |
+HCURSOR WINAPI WebPluginDelegateImpl::SetCursorPatch(HCURSOR cursor) { |
+ // The windowless flash plugin periodically calls SetCursor in a wndproc |
+ // instantiated on the plugin thread. This causes annoying cursor flicker |
+ // when the mouse is moved on a foreground tab, with a windowless plugin |
+ // instance in a background tab. We just ignore the call here. |
+ if (!g_current_plugin_instance) { |
+ HCURSOR current_cursor = GetCursor(); |
+ if (current_cursor != cursor) { |
+ ::SetCursor(cursor); |
+ } |
+ return current_cursor; |
+ } |
+ return ::SetCursor(cursor); |
+} |
+ |
+LONG WINAPI WebPluginDelegateImpl::RegEnumKeyExWPatch( |
+ HKEY key, DWORD index, LPWSTR name, LPDWORD name_size, LPDWORD reserved, |
+ LPWSTR class_name, LPDWORD class_size, PFILETIME last_write_time) { |
+ DWORD orig_size = *name_size; |
+ LONG rv = RegEnumKeyExW(key, index, name, name_size, reserved, class_name, |
+ class_size, last_write_time); |
+ if (rv == ERROR_SUCCESS && |
+ GetKeyPath(key).find(L"Microsoft\\MediaPlayer\\ShimInclusionList") != |
+ std::wstring::npos) { |
+ static const wchar_t kChromeExeName[] = L"chrome.exe"; |
+ wcsncpy_s(name, orig_size, kChromeExeName, arraysize(kChromeExeName)); |
+ *name_size = |
+ std::min(orig_size, static_cast<DWORD>(arraysize(kChromeExeName))); |
+ } |
+ |
+ return rv; |
+} |
+ |
+void WebPluginDelegateImpl::ImeCompositionUpdated( |
+ const base::string16& text, |
+ const std::vector<int>& clauses, |
+ const std::vector<int>& target, |
+ int cursor_position) { |
+ if (!plugin_ime_) |
+ plugin_ime_.reset(new WebPluginIMEWin); |
+ |
+ plugin_ime_->CompositionUpdated(text, clauses, target, cursor_position); |
+ plugin_ime_->SendEvents(instance()); |
+} |
+ |
+void WebPluginDelegateImpl::ImeCompositionCompleted( |
+ const base::string16& text) { |
+ if (!plugin_ime_) |
+ plugin_ime_.reset(new WebPluginIMEWin); |
+ plugin_ime_->CompositionCompleted(text); |
+ plugin_ime_->SendEvents(instance()); |
+} |
+ |
+bool WebPluginDelegateImpl::GetIMEStatus(int* input_type, |
+ gfx::Rect* caret_rect) { |
+ if (!plugin_ime_) |
+ return false; |
+ return plugin_ime_->GetStatus(input_type, caret_rect); |
+} |
+ |
+// static |
+FARPROC WINAPI WebPluginDelegateImpl::GetProcAddressPatch(HMODULE module, |
+ LPCSTR name) { |
+ FARPROC imm_function = WebPluginIMEWin::GetProcAddress(name); |
+ if (imm_function) |
+ return imm_function; |
+ return ::GetProcAddress(module, name); |
+} |
+ |
+HWND WINAPI WebPluginDelegateImpl::WindowFromPointPatch(POINT point) { |
+ HWND window = WindowFromPoint(point); |
+ if (::ScreenToClient(window, &point)) { |
+ HWND child = ChildWindowFromPoint(window, point); |
+ if (::IsWindow(child) && |
+ ::GetProp(child, content::kPluginDummyParentProperty)) |
+ return child; |
+ } |
+ return window; |
+} |
+ |
} // namespace content |