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Unified Diff: content/child/npapi/webplugin_delegate_impl_win.cc

Issue 1813143002: Remove a bunch of NPAPI quirks and related support code (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@remove_windowed_plugins
Patch Set: rebase Created 4 years, 9 months ago
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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 f0213e372fe732025ddf6865d1a32f39c85cf209..70657052b54e87efceccbebca5a37be871eef25b 100644
--- a/content/child/npapi/webplugin_delegate_impl_win.cc
+++ b/content/child/npapi/webplugin_delegate_impl_win.cc
@@ -22,13 +22,10 @@
#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"
@@ -45,47 +42,6 @@ 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
// is never called with NPNWindoTypeDrawable and NPWindow set to NULL.
@@ -118,104 +74,13 @@ class DrawableContextEnforcer {
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),
@@ -224,182 +89,17 @@ WebPluginDelegateImpl::WebPluginDelegateImpl(WebPlugin* plugin,
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) {
@@ -410,234 +110,6 @@ void WebPluginDelegateImpl::Paint(SkCanvas* canvas, const gfx::Rect& 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.
static bool IsUserGestureMessage(unsigned int message) {
switch (message) {
@@ -860,51 +332,6 @@ bool WebPluginDelegateImpl::PlatformHandleInputEvent(
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;
@@ -936,174 +363,7 @@ bool WebPluginDelegateImpl::PlatformHandleInputEvent(
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
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