1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
|
// 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 "webkit/plugins/npapi/webplugin_delegate_impl.h"
#include <map>
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/lazy_instance.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "base/metrics/stats_counters.h"
#include "base/string_util.h"
#include "base/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 "skia/ext/platform_canvas.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
#include "ui/base/win/hwnd_util.h"
#include "webkit/common/cursors/webcursor.h"
#include "webkit/plugins/npapi/plugin_constants_win.h"
#include "webkit/plugins/npapi/plugin_instance.h"
#include "webkit/plugins/npapi/plugin_lib.h"
#include "webkit/plugins/npapi/plugin_list.h"
#include "webkit/plugins/npapi/plugin_stream_url.h"
#include "webkit/plugins/npapi/plugin_utils.h"
#include "webkit/plugins/npapi/webplugin.h"
#include "webkit/plugins/npapi/webplugin_ime_win.h"
#include "webkit/plugins/plugin_constants.h"
using WebKit::WebKeyboardEvent;
using WebKit::WebInputEvent;
using WebKit::WebMouseEvent;
namespace webkit {
namespace npapi {
namespace {
const wchar_t kWebPluginDelegateProperty[] = L"WebPluginDelegateProperty";
const wchar_t kPluginNameAtomProperty[] = L"PluginNameAtom";
const wchar_t kPluginVersionAtomProperty[] = L"PluginVersionAtom";
const wchar_t kDummyActivationWindowName[] = L"DummyWindowForActivation";
const wchar_t kPluginFlashThrottle[] = L"FlashThrottle";
// 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;
// Flash displays popups in response to user clicks by posting a WM_USER
// message to the plugin window. The handler for this message displays
// the popup. To ensure that the popups allowed state is sent correctly
// to the renderer we reset the popups allowed state in a timer.
const int kWindowedPluginPopupTimerMs = 50;
// 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;
// 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.
// Doing so allows removing NPP_SetWindow call during painting a windowless
// plugin, which otherwise could trigger layout change while painting by
// invoking NPN_Evaluate. Which would cause bad, bad crashes. Bad crashes.
// TODO(dglazkov): If this approach doesn't produce regressions, move class to
// webplugin_delegate_impl.h and implement for other platforms.
class DrawableContextEnforcer {
public:
explicit DrawableContextEnforcer(NPWindow* window)
: window_(window),
disposable_dc_(window && !window->window) {
// If NPWindow is NULL, create a device context with monochrome 1x1 surface
// and stuff it to NPWindow.
if (disposable_dc_)
window_->window = CreateCompatibleDC(NULL);
}
~DrawableContextEnforcer() {
if (!disposable_dc_)
return;
DeleteDC(static_cast<HDC>(window_->window));
window_->window = NULL;
}
private:
NPWindow* window_;
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 != 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 != 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));
}
int GetPluginMajorVersion(const WebPluginInfo& plugin_info) {
Version plugin_version;
webkit::npapi::CreateVersionFromString(plugin_info.version, &plugin_version);
int major_version = 0;
if (plugin_version.IsValid())
major_version = plugin_version.components()[0];
return major_version;
}
bool GetPluginPropertyFromWindow(
HWND window, const wchar_t* plugin_atom_property,
base::string16* plugin_property) {
ATOM plugin_atom = reinterpret_cast<ATOM>(
GetPropW(window, plugin_atom_property));
if (plugin_atom != 0) {
WCHAR plugin_property_local[MAX_PATH] = {0};
GlobalGetAtomNameW(plugin_atom,
plugin_property_local,
ARRAYSIZE(plugin_property_local));
*plugin_property = plugin_property_local;
return true;
}
return false;
}
} // namespace
bool WebPluginDelegateImpl::IsPluginDelegateWindow(HWND window) {
return ui::GetClassName(window) == base::string16(kNativeWindowClassName);
}
// static
bool WebPluginDelegateImpl::GetPluginNameFromWindow(
HWND window, base::string16* plugin_name) {
return IsPluginDelegateWindow(window) &&
GetPluginPropertyFromWindow(
window, kPluginNameAtomProperty, plugin_name);
}
// static
bool WebPluginDelegateImpl::GetPluginVersionFromWindow(
HWND window, base::string16* plugin_version) {
return IsPluginDelegateWindow(window) &&
GetPluginPropertyFromWindow(
window, kPluginVersionAtomProperty, plugin_version);
}
bool WebPluginDelegateImpl::IsDummyActivationWindow(HWND window) {
if (!IsWindow(window))
return false;
wchar_t window_title[MAX_PATH + 1] = {0};
if (GetWindowText(window, window_title, arraysize(window_title))) {
return (0 == lstrcmpiW(window_title, kDummyActivationWindowName));
}
return false;
}
HWND WebPluginDelegateImpl::GetDefaultWindowParent() {
return GetDesktopWindow();
}
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);
}
LRESULT CALLBACK WebPluginDelegateImpl::MouseHookProc(
int code, WPARAM wParam, LPARAM lParam) {
if (code == HC_ACTION) {
MOUSEHOOKSTRUCT* hook_struct = reinterpret_cast<MOUSEHOOKSTRUCT*>(lParam);
if (hook_struct)
HandleCaptureForMessage(hook_struct->hwnd, wParam);
}
return CallNextHookEx(NULL, code, wParam, lParam);
}
WebPluginDelegateImpl::WebPluginDelegateImpl(
PluginInstance* instance)
: instance_(instance),
quirks_(0),
plugin_(NULL),
windowless_(false),
windowed_handle_(NULL),
windowed_did_set_window_(false),
plugin_wnd_proc_(NULL),
last_message_(0),
is_calling_wndproc(false),
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),
user_gesture_message_posted_(false),
user_gesture_msg_factory_(this),
handle_event_depth_(0),
mouse_hook_(NULL),
first_set_window_call_(true),
plugin_has_focus_(false),
has_webkit_focus_(false),
containing_view_has_focus_(true),
creation_succeeded_(false) {
memset(&window_, 0, sizeof(window_));
const WebPluginInfo& plugin_info = instance_->plugin_lib()->plugin_info();
std::wstring filename =
StringToLowerASCII(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;
} else if (filename == kAcrobatReaderPlugin) {
// Check for the version number above or equal 9.
int 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;
int 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>(old_dummy_window_proc_));
}
::DestroyWindow(dummy_window_for_activation_);
}
DestroyInstance();
if (!windowless_)
WindowedDestroyWindow();
if (handle_event_pump_messages_event_) {
CloseHandle(handle_event_pump_messages_event_);
}
}
bool WebPluginDelegateImpl::PlatformInitialize() {
plugin_->SetWindow(windowed_handle_);
if (windowless_ && !instance_->plugin_lib()->internal()) {
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_));
}
// We cannot patch internal plugins as they are not shared libraries.
if (!instance_->plugin_lib()->internal()) {
// 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 (windowless_ && !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 (windowless_ && !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);
}
// The windowed flash plugin has a bug which occurs when the plugin enters
// fullscreen mode. It basically captures the mouse on WM_LBUTTONDOWN and
// does not release capture correctly causing it to stop receiving
// subsequent mouse events. This problem is also seen in Safari where there
// is code to handle this in the wndproc. However the plugin subclasses the
// window again in WM_LBUTTONDOWN before entering full screen. As a result
// Safari does not receive the WM_LBUTTONUP message. To workaround this
// issue we use a per thread mouse hook. This bug does not occur in Firefox
// and opera. Firefox has code similar to Safari. It could well be a bug in
// the flash plugin, which only occurs in webkit based browsers.
if (quirks_ & PLUGIN_QUIRK_HANDLE_MOUSE_CAPTURE) {
mouse_hook_ = SetWindowsHookEx(WH_MOUSE, MouseHookProc, NULL,
GetCurrentThreadId());
}
}
// 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);
}
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 (mouse_hook_) {
UnhookWindowsHookEx(mouse_hook_);
mouse_hook_ = NULL;
}
}
void WebPluginDelegateImpl::Paint(WebKit::WebCanvas* canvas,
const gfx::Rect& rect) {
if (windowless_ && skia::SupportsPlatformPaint(canvas)) {
skia::ScopedPlatformPaint scoped_platform_paint(canvas);
HDC hdc = scoped_platform_paint.GetPlatformSurface();
WindowlessPaint(hdc, rect);
}
}
bool WebPluginDelegateImpl::WindowedCreatePlugin() {
DCHECK(!windowed_handle_);
RegisterNativeWindowClass();
// The window will be sized and shown later.
windowed_handle_ = CreateWindowEx(
WS_EX_LEFT | WS_EX_LTRREADING | WS_EX_RIGHTSCROLLBAR,
kNativeWindowClassName,
0,
WS_POPUP | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
0,
0,
0,
0,
GetDefaultWindowParent(),
0,
GetModuleHandle(NULL),
0);
if (windowed_handle_ == 0)
return false;
// This is a tricky workaround for Issue 2673 in chromium "Flash: IME not
// available". To use IMEs in this window, we have to make Windows attach
// IMEs to this window (i.e. load IME DLLs, attach them to this process, and
// add their message hooks to this window). Windows attaches IMEs while this
// process creates a top-level window. On the other hand, to layout this
// window correctly in the given parent window (RenderWidgetHostViewWin or
// RenderWidgetHostViewAura), this window should be a child window of the
// parent window. To satisfy both of the above conditions, this code once
// creates a top-level window and change it to a child window of the parent
// window (in the browser process).
SetWindowLongPtr(windowed_handle_, GWL_STYLE,
WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS);
BOOL result = SetProp(windowed_handle_, kWebPluginDelegateProperty, this);
DCHECK(result == TRUE) << "SetProp failed, last error = " << GetLastError();
// Get the name and version of the plugin, create atoms and set them in a
// window property. Use atoms so that other processes can access the name and
// version of the plugin that this window is hosting.
if (instance_ != NULL) {
PluginLib* plugin_lib = instance()->plugin_lib();
if (plugin_lib != NULL) {
std::wstring plugin_name = plugin_lib->plugin_info().name;
if (!plugin_name.empty()) {
ATOM plugin_name_atom = GlobalAddAtomW(plugin_name.c_str());
DCHECK_NE(0, plugin_name_atom);
result = SetProp(windowed_handle_,
kPluginNameAtomProperty,
reinterpret_cast<HANDLE>(plugin_name_atom));
DCHECK(result == TRUE) << "SetProp failed, last error = " <<
GetLastError();
}
base::string16 plugin_version = plugin_lib->plugin_info().version;
if (!plugin_version.empty()) {
ATOM plugin_version_atom = GlobalAddAtomW(plugin_version.c_str());
DCHECK_NE(0, plugin_version_atom);
result = SetProp(windowed_handle_,
kPluginVersionAtomProperty,
reinterpret_cast<HANDLE>(plugin_version_atom));
DCHECK(result == TRUE) << "SetProp failed, last error = " <<
GetLastError();
}
}
}
// Calling SetWindowLongPtrA here makes the window proc ASCII, which is
// required by at least the Shockwave Director plug-in.
SetWindowLongPtrA(
windowed_handle_, GWLP_WNDPROC, reinterpret_cast<LONG>(DefWindowProcA));
return true;
}
void WebPluginDelegateImpl::WindowedDestroyWindow() {
if (windowed_handle_ != NULL) {
// Unsubclass the window.
WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>(
GetWindowLongPtr(windowed_handle_, GWLP_WNDPROC));
if (current_wnd_proc == NativeWndProc) {
SetWindowLongPtr(windowed_handle_,
GWLP_WNDPROC,
reinterpret_cast<LONG>(plugin_wnd_proc_));
}
plugin_->WillDestroyWindow(windowed_handle_);
DestroyWindow(windowed_handle_);
windowed_handle_ = 0;
}
}
// 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;
msg.time = reinterpret_cast<DWORD>(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>(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.
GetDefaultWindowParent(),
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>(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;
}
bool WebPluginDelegateImpl::WindowedReposition(
const gfx::Rect& window_rect,
const gfx::Rect& clip_rect) {
if (!windowed_handle_) {
NOTREACHED();
return false;
}
if (window_rect_ == window_rect && clip_rect_ == clip_rect)
return false;
// We only set the plugin's size here. Its position is moved elsewhere, which
// allows the window moves/scrolling/clipping to be synchronized with the page
// and other windows.
// If the plugin window has no parent, then don't focus it because it isn't
// being displayed anywhere. See:
// http://code.google.com/p/chromium/issues/detail?id=32658
if (window_rect.size() != window_rect_.size()) {
UINT flags = SWP_NOMOVE | SWP_NOZORDER;
if (!GetParent(windowed_handle_))
flags |= SWP_NOACTIVATE;
::SetWindowPos(windowed_handle_,
NULL,
0,
0,
window_rect.width(),
window_rect.height(),
flags);
}
window_rect_ = window_rect;
clip_rect_ = clip_rect;
// Ensure that the entire window gets repainted.
::InvalidateRect(windowed_handle_, NULL, FALSE);
return true;
}
void WebPluginDelegateImpl::WindowedSetWindow() {
if (!instance_)
return;
if (!windowed_handle_) {
NOTREACHED();
return;
}
instance()->set_window_handle(windowed_handle_);
DCHECK(!instance()->windowless());
window_.clipRect.top = std::max(0, clip_rect_.y());
window_.clipRect.left = std::max(0, clip_rect_.x());
window_.clipRect.bottom = std::max(0, clip_rect_.y() + clip_rect_.height());
window_.clipRect.right = std::max(0, clip_rect_.x() + clip_rect_.width());
window_.height = window_rect_.height();
window_.width = window_rect_.width();
window_.x = 0;
window_.y = 0;
window_.window = windowed_handle_;
window_.type = NPWindowTypeWindow;
// Reset this flag before entering the instance in case of side-effects.
windowed_did_set_window_ = true;
NPError err = instance()->NPP_SetWindow(&window_);
if (quirks_ & PLUGIN_QUIRK_SETWINDOW_TWICE)
instance()->NPP_SetWindow(&window_);
WNDPROC current_wnd_proc = reinterpret_cast<WNDPROC>(
GetWindowLongPtr(windowed_handle_, GWLP_WNDPROC));
if (current_wnd_proc != NativeWndProc) {
plugin_wnd_proc_ = reinterpret_cast<WNDPROC>(SetWindowLongPtr(
windowed_handle_, GWLP_WNDPROC, reinterpret_cast<LONG>(NativeWndProc)));
}
}
ATOM WebPluginDelegateImpl::RegisterNativeWindowClass() {
static bool have_registered_window_class = false;
if (have_registered_window_class == true)
return true;
have_registered_window_class = true;
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_DBLCLKS;
wcex.lpfnWndProc = WrapperWindowProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = GetModuleHandle(NULL);
wcex.hIcon = 0;
wcex.hCursor = 0;
// Some plugins like windows media player 11 create child windows parented
// by our plugin window, where the media content is rendered. These plugins
// dont implement WM_ERASEBKGND, which causes painting issues, when the
// window where the media is rendered is moved around. DefWindowProc does
// implement WM_ERASEBKGND correctly if we have a valid background brush.
wcex.hbrBackground = reinterpret_cast<HBRUSH>(COLOR_WINDOW+1);
wcex.lpszMenuName = 0;
wcex.lpszClassName = kNativeWindowClassName;
wcex.hIconSm = 0;
return RegisterClassEx(&wcex);
}
LRESULT CALLBACK WebPluginDelegateImpl::WrapperWindowProc(
HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
// This is another workaround for Issue 2673 in chromium "Flash: IME not
// available". Somehow, the CallWindowProc() function does not dispatch
// window messages when its first parameter is a handle representing the
// DefWindowProc() function. To avoid this problem, this code creates a
// wrapper function which just encapsulates the DefWindowProc() function
// and set it as the window procedure of a windowed plug-in.
return DefWindowProc(hWnd, message, wParam, lParam);
}
// Returns true if the message passed in corresponds to a user gesture.
static bool IsUserGestureMessage(unsigned int message) {
switch (message) {
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_RBUTTONDOWN:
case WM_RBUTTONUP:
case WM_MBUTTONDOWN:
case WM_MBUTTONUP:
case WM_KEYDOWN:
case WM_KEYUP:
return true;
default:
break;
}
return false;
}
LRESULT CALLBACK WebPluginDelegateImpl::NativeWndProc(
HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam) {
WebPluginDelegateImpl* delegate = reinterpret_cast<WebPluginDelegateImpl*>(
GetProp(hwnd, kWebPluginDelegateProperty));
if (!delegate) {
NOTREACHED();
return 0;
}
if (message == delegate->last_message_ &&
delegate->GetQuirks() & PLUGIN_QUIRK_DONT_CALL_WND_PROC_RECURSIVELY &&
delegate->is_calling_wndproc) {
// Real may go into a state where it recursively dispatches the same event
// when subclassed. See https://bugzilla.mozilla.org/show_bug.cgi?id=192914
// We only do the recursive check for Real because it's possible and valid
// for a plugin to synchronously dispatch a message to itself such that it
// looks like it's in recursion.
return TRUE;
}
// 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.
if (message == WM_USER + 1 &&
delegate->GetQuirks() & PLUGIN_QUIRK_THROTTLE_WM_USER_PLUS_ONE) {
WebPluginDelegateImpl::ThrottleMessage(delegate->plugin_wnd_proc_, hwnd,
message, wparam, lparam);
return FALSE;
}
LRESULT result;
uint32 old_message = delegate->last_message_;
delegate->last_message_ = message;
static UINT custom_msg = RegisterWindowMessage(kPaintMessageName);
if (message == custom_msg) {
// Get the invalid rect which is in screen coordinates and convert to
// window coordinates.
gfx::Rect invalid_rect;
invalid_rect.set_x(wparam >> 16);
invalid_rect.set_y(wparam & 0xFFFF);
invalid_rect.set_width(lparam >> 16);
invalid_rect.set_height(lparam & 0xFFFF);
RECT window_rect;
GetWindowRect(hwnd, &window_rect);
invalid_rect.Offset(-window_rect.left, -window_rect.top);
// The plugin window might have non-client area. If we don't pass in
// RDW_FRAME then the children don't receive WM_NCPAINT messages while
// scrolling, which causes painting problems (http://b/issue?id=923945).
uint32 flags = RDW_INVALIDATE | RDW_ALLCHILDREN | RDW_FRAME;
// If a plugin (like Google Earth or Java) has child windows that are hosted
// in a different process, then RedrawWindow with UPDATENOW will
// synchronously wait for this call to complete. Some messages are pumped
// but not others, which could lead to a deadlock. So avoid reentrancy by
// only synchronously calling RedrawWindow once at a time.
if (old_message != custom_msg)
flags |= RDW_UPDATENOW;
RECT rect = invalid_rect.ToRECT();
RedrawWindow(hwnd, &rect, NULL, flags);
result = FALSE;
} else {
delegate->is_calling_wndproc = true;
if (!delegate->user_gesture_message_posted_ &&
IsUserGestureMessage(message)) {
delegate->user_gesture_message_posted_ = true;
delegate->instance()->PushPopupsEnabledState(true);
base::MessageLoop::current()->PostDelayedTask(
FROM_HERE,
base::Bind(&WebPluginDelegateImpl::OnUserGestureEnd,
delegate->user_gesture_msg_factory_.GetWeakPtr()),
base::TimeDelta::FromMilliseconds(kWindowedPluginPopupTimerMs));
}
HandleCaptureForMessage(hwnd, message);
// 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 = delegate;
result = CallWindowProc(
delegate->plugin_wnd_proc_, hwnd, message, wparam, lparam);
delegate->is_calling_wndproc = false;
g_current_plugin_instance = last_plugin_instance;
if (message == WM_NCDESTROY) {
RemoveProp(hwnd, kWebPluginDelegateProperty);
ATOM plugin_name_atom = reinterpret_cast<ATOM>(
RemoveProp(hwnd, kPluginNameAtomProperty));
if (plugin_name_atom != 0)
GlobalDeleteAtom(plugin_name_atom);
ATOM plugin_version_atom = reinterpret_cast<ATOM>(
RemoveProp(hwnd, kPluginVersionAtomProperty));
if (plugin_version_atom != 0)
GlobalDeleteAtom(plugin_version_atom);
ClearThrottleQueueForWindow(hwnd);
}
}
delegate->last_message_ = old_message;
return result;
}
void WebPluginDelegateImpl::WindowlessUpdateGeometry(
const gfx::Rect& window_rect,
const gfx::Rect& clip_rect) {
bool window_rect_changed = (window_rect_ != window_rect);
// Only resend to the instance if the geometry has changed.
if (!window_rect_changed && clip_rect == clip_rect_)
return;
clip_rect_ = clip_rect;
window_rect_ = window_rect;
WindowlessSetWindow();
if (window_rect_changed) {
WINDOWPOS win_pos = {0};
win_pos.x = window_rect_.x();
win_pos.y = window_rect_.y();
win_pos.cx = window_rect_.width();
win_pos.cy = window_rect_.height();
NPEvent pos_changed_event;
pos_changed_event.event = WM_WINDOWPOSCHANGED;
pos_changed_event.wParam = 0;
pos_changed_event.lParam = PtrToUlong(&win_pos);
instance()->NPP_HandleEvent(&pos_changed_event);
}
}
void WebPluginDelegateImpl::WindowlessPaint(HDC hdc,
const gfx::Rect& damage_rect) {
DCHECK(hdc);
RECT damage_rect_win;
damage_rect_win.left = damage_rect.x(); // + window_rect_.x();
damage_rect_win.top = damage_rect.y(); // + window_rect_.y();
damage_rect_win.right = damage_rect_win.left + damage_rect.width();
damage_rect_win.bottom = damage_rect_win.top + damage_rect.height();
// Save away the old HDC as this could be a nested invocation.
void* old_dc = window_.window;
window_.window = hdc;
NPEvent paint_event;
paint_event.event = WM_PAINT;
// NOTE: NPAPI is not 64bit safe. It puts pointers into 32bit values.
paint_event.wParam = PtrToUlong(hdc);
paint_event.lParam = PtrToUlong(&damage_rect_win);
base::StatsRate plugin_paint("Plugin.Paint");
base::StatsScope<base::StatsRate> scope(plugin_paint);
instance()->NPP_HandleEvent(&paint_event);
window_.window = old_dc;
}
void WebPluginDelegateImpl::WindowlessSetWindow() {
if (!instance())
return;
if (window_rect_.IsEmpty()) // wait for geometry to be set.
return;
DCHECK(instance()->windowless());
window_.clipRect.top = clip_rect_.y();
window_.clipRect.left = clip_rect_.x();
window_.clipRect.bottom = clip_rect_.y() + clip_rect_.height();
window_.clipRect.right = clip_rect_.x() + clip_rect_.width();
window_.height = window_rect_.height();
window_.width = window_rect_.width();
window_.x = window_rect_.x();
window_.y = window_rect_.y();
window_.type = NPWindowTypeDrawable;
DrawableContextEnforcer enforcer(&window_);
NPError err = instance()->NPP_SetWindow(&window_);
DCHECK(err == NPERR_NO_ERROR);
}
bool WebPluginDelegateImpl::PlatformSetPluginHasFocus(bool focused) {
DCHECK(instance()->windowless());
NPEvent focus_event;
focus_event.event = focused ? WM_SETFOCUS : WM_KILLFOCUS;
focus_event.wParam = 0;
focus_event.lParam = 0;
instance()->NPP_HandleEvent(&focus_event);
return true;
}
static bool NPEventFromWebMouseEvent(const WebMouseEvent& event,
NPEvent* np_event) {
np_event->lParam = static_cast<uint32>(MAKELPARAM(event.windowX,
event.windowY));
np_event->wParam = 0;
if (event.modifiers & WebInputEvent::ControlKey)
np_event->wParam |= MK_CONTROL;
if (event.modifiers & WebInputEvent::ShiftKey)
np_event->wParam |= MK_SHIFT;
if (event.modifiers & WebInputEvent::LeftButtonDown)
np_event->wParam |= MK_LBUTTON;
if (event.modifiers & WebInputEvent::MiddleButtonDown)
np_event->wParam |= MK_MBUTTON;
if (event.modifiers & WebInputEvent::RightButtonDown)
np_event->wParam |= MK_RBUTTON;
switch (event.type) {
case WebInputEvent::MouseMove:
case WebInputEvent::MouseLeave:
case WebInputEvent::MouseEnter:
np_event->event = WM_MOUSEMOVE;
return true;
case WebInputEvent::MouseDown:
switch (event.button) {
case WebMouseEvent::ButtonLeft:
np_event->event = WM_LBUTTONDOWN;
break;
case WebMouseEvent::ButtonMiddle:
np_event->event = WM_MBUTTONDOWN;
break;
case WebMouseEvent::ButtonRight:
np_event->event = WM_RBUTTONDOWN;
break;
}
return true;
case WebInputEvent::MouseUp:
switch (event.button) {
case WebMouseEvent::ButtonLeft:
np_event->event = WM_LBUTTONUP;
break;
case WebMouseEvent::ButtonMiddle:
np_event->event = WM_MBUTTONUP;
break;
case WebMouseEvent::ButtonRight:
np_event->event = WM_RBUTTONUP;
break;
}
return true;
default:
NOTREACHED();
return false;
}
}
static bool NPEventFromWebKeyboardEvent(const WebKeyboardEvent& event,
NPEvent* np_event) {
np_event->wParam = event.windowsKeyCode;
switch (event.type) {
case WebInputEvent::KeyDown:
np_event->event = WM_KEYDOWN;
np_event->lParam = 0;
return true;
case WebInputEvent::Char:
np_event->event = WM_CHAR;
np_event->lParam = 0;
return true;
case WebInputEvent::KeyUp:
np_event->event = WM_KEYUP;
np_event->lParam = 0x8000;
return true;
default:
NOTREACHED();
return false;
}
}
static bool NPEventFromWebInputEvent(const WebInputEvent& event,
NPEvent* np_event) {
switch (event.type) {
case WebInputEvent::MouseMove:
case WebInputEvent::MouseLeave:
case WebInputEvent::MouseEnter:
case WebInputEvent::MouseDown:
case WebInputEvent::MouseUp:
if (event.size < sizeof(WebMouseEvent)) {
NOTREACHED();
return false;
}
return NPEventFromWebMouseEvent(
*static_cast<const WebMouseEvent*>(&event), np_event);
case WebInputEvent::KeyDown:
case WebInputEvent::Char:
case WebInputEvent::KeyUp:
if (event.size < sizeof(WebKeyboardEvent)) {
NOTREACHED();
return false;
}
return NPEventFromWebKeyboardEvent(
*static_cast<const WebKeyboardEvent*>(&event), np_event);
default:
return false;
}
}
bool WebPluginDelegateImpl::PlatformHandleInputEvent(
const WebInputEvent& event, WebCursor::CursorInfo* cursor_info) {
DCHECK(cursor_info != NULL);
NPEvent np_event;
if (!NPEventFromWebInputEvent(event, &np_event)) {
return false;
}
// Allow this plug-in to access this IME emulator through IMM32 API while the
// plug-in 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_) != GetDefaultWindowParent();
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;
if (IsUserGestureMessage(np_event.event)) {
instance()->PushPopupsEnabledState(true);
popups_enabled = true;
}
bool ret = instance()->NPP_HandleEvent(&np_event) != 0;
if (popups_enabled) {
instance()->PopPopupsEnabledState();
}
// Flash and SilverLight always return false, even when they swallow the
// event. Flash does this because it passes the event to its window proc,
// which is supposed to return 0 if an event was handled. There are few
// exceptions, such as IME, where it sometimes returns true.
ret = true;
if (np_event.event == WM_MOUSEMOVE) {
current_windowless_cursor_.InitFromExternalCursor(GetCursor());
// Snag a reference to the current cursor ASAP in case the plugin modified
// it. There is a nasty race condition here with the multiprocess browser
// as someone might be setting the cursor in the main process as well.
current_windowless_cursor_.GetCursorInfo(cursor_info);
}
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 (::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;
}
void WebPluginDelegateImpl::OnUserGestureEnd() {
user_gesture_message_posted_ = false;
instance()->PopPopupsEnabledState();
}
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_) !=
GetDefaultWindowParent();
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);
}
void WebPluginDelegateImpl::HandleCaptureForMessage(HWND window,
UINT message) {
if (!WebPluginDelegateImpl::IsPluginDelegateWindow(window))
return;
switch (message) {
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
::SetCapture(window);
// As per documentation the WM_PARENTNOTIFY message is sent to the parent
// window chain if mouse input is received by the child window. However
// the parent receives the WM_PARENTNOTIFY message only if we doubleclick
// on the window. We send the WM_PARENTNOTIFY message for mouse input
// messages to the parent to indicate that user action is expected.
::SendMessage(::GetParent(window), WM_PARENTNOTIFY, message, 0);
break;
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
::ReleaseCapture();
break;
default:
break;
}
}
} // namespace npapi
} // namespace webkit
|