summaryrefslogtreecommitdiff
path: root/fpdfsdk/src/jsapi/fxjs_v8.cpp
blob: 4715d2a8d2430e48ab4b82c0b2e5c085547a175d (plain)
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
// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "../../include/jsapi/fxjs_v8.h"

#include "../../../core/include/fxcrt/fx_basic.h"

const wchar_t kFXJSValueNameString[] = L"string";
const wchar_t kFXJSValueNameNumber[] = L"number";
const wchar_t kFXJSValueNameBoolean[] = L"boolean";
const wchar_t kFXJSValueNameDate[] = L"date";
const wchar_t kFXJSValueNameObject[] = L"object";
const wchar_t kFXJSValueNameFxobj[] = L"fxobj";
const wchar_t kFXJSValueNameNull[] = L"null";
const wchar_t kFXJSValueNameUndefined[] = L"undefined";

// Keep this consistent with the values defined in gin/public/context_holder.h
// (without actually requiring a dependency on gin itself for the standalone
// embedders of PDFIum). The value we want to use is:
//   kPerContextDataStartIndex + kEmbedderPDFium, which is 3.
static const unsigned int kPerContextDataIndex = 3u;
static unsigned int g_embedderDataSlot = 1u;
static v8::Isolate* g_isolate = nullptr;
static size_t g_isolate_ref_count = 0;
static FXJS_ArrayBufferAllocator* g_arrayBufferAllocator = nullptr;
static v8::Global<v8::ObjectTemplate>* g_DefaultGlobalObjectTemplate = nullptr;

class CFXJS_PrivateData {
 public:
  CFXJS_PrivateData(int nObjDefID) : ObjDefID(nObjDefID), pPrivate(NULL) {}

  int ObjDefID;
  void* pPrivate;
};

class CFXJS_ObjDefinition {
 public:
  static int MaxID(v8::Isolate* pIsolate) {
    return static_cast<int>(
        FXJS_PerIsolateData::Get(pIsolate)->m_ObjectDefnArray.GetSize());
  }
  static CFXJS_ObjDefinition* ForID(v8::Isolate* pIsolate, int id) {
    // Note: GetAt() halts if out-of-range even in release builds.
    return static_cast<CFXJS_ObjDefinition*>(
        FXJS_PerIsolateData::Get(pIsolate)->m_ObjectDefnArray.GetAt(id));
  }
  CFXJS_ObjDefinition(v8::Isolate* isolate,
                      const wchar_t* sObjName,
                      FXJSOBJTYPE eObjType,
                      FXJS_CONSTRUCTOR pConstructor,
                      FXJS_DESTRUCTOR pDestructor)
      : m_ObjName(sObjName),
        m_ObjType(eObjType),
        m_pConstructor(pConstructor),
        m_pDestructor(pDestructor),
        m_pIsolate(isolate) {
    v8::Isolate::Scope isolate_scope(isolate);
    v8::HandleScope handle_scope(isolate);

    v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New(isolate);
    fun->InstanceTemplate()->SetInternalFieldCount(2);
    m_FunctionTemplate.Reset(isolate, fun);

    v8::Local<v8::Signature> sig = v8::Signature::New(isolate, fun);
    m_Signature.Reset(isolate, sig);
  }

  int AssignID() {
    FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(m_pIsolate);
    pData->m_ObjectDefnArray.Add(this);
    return pData->m_ObjectDefnArray.GetSize() - 1;
  }

  v8::Local<v8::ObjectTemplate> GetInstanceTemplate() {
    v8::EscapableHandleScope scope(m_pIsolate);
    v8::Local<v8::FunctionTemplate> function =
        m_FunctionTemplate.Get(m_pIsolate);
    return scope.Escape(function->InstanceTemplate());
  }

  v8::Local<v8::Signature> GetSignature() {
    v8::EscapableHandleScope scope(m_pIsolate);
    return scope.Escape(m_Signature.Get(m_pIsolate));
  }

  const wchar_t* const m_ObjName;
  const FXJSOBJTYPE m_ObjType;
  const FXJS_CONSTRUCTOR m_pConstructor;
  const FXJS_DESTRUCTOR m_pDestructor;

  v8::Isolate* m_pIsolate;
  v8::Global<v8::FunctionTemplate> m_FunctionTemplate;
  v8::Global<v8::Signature> m_Signature;
  v8::Global<v8::Object> m_StaticObj;
};

static v8::Local<v8::ObjectTemplate> GetGlobalObjectTemplate(
    v8::Isolate* pIsolate) {
  int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
  for (int i = 0; i < maxID; ++i) {
    CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
    if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL)
      return pObjDef->GetInstanceTemplate();
  }
  if (!g_DefaultGlobalObjectTemplate) {
    g_DefaultGlobalObjectTemplate = new v8::Global<v8::ObjectTemplate>;
    g_DefaultGlobalObjectTemplate->Reset(pIsolate,
                                         v8::ObjectTemplate::New(pIsolate));
  }
  return g_DefaultGlobalObjectTemplate->Get(pIsolate);
}

void* FXJS_ArrayBufferAllocator::Allocate(size_t length) {
  return calloc(1, length);
}

void* FXJS_ArrayBufferAllocator::AllocateUninitialized(size_t length) {
  return malloc(length);
}

void FXJS_ArrayBufferAllocator::Free(void* data, size_t length) {
  free(data);
}

void FXJS_Initialize(unsigned int embedderDataSlot, v8::Isolate* pIsolate) {
  if (g_isolate) {
    ASSERT(g_embedderDataSlot == embedderDataSlot);
    ASSERT(g_isolate == pIsolate);
    return;
  }
  g_embedderDataSlot = embedderDataSlot;
  g_isolate = pIsolate;
}

void FXJS_Release() {
  ASSERT(!g_isolate || g_isolate_ref_count == 0);
  delete g_DefaultGlobalObjectTemplate;
  g_DefaultGlobalObjectTemplate = nullptr;
  g_isolate = nullptr;

  delete g_arrayBufferAllocator;
  g_arrayBufferAllocator = nullptr;
}

bool FXJS_GetIsolate(v8::Isolate** pResultIsolate) {
  if (g_isolate) {
    *pResultIsolate = g_isolate;
    return false;
  }
  // Provide backwards compatibility when no external isolate.
  if (!g_arrayBufferAllocator)
    g_arrayBufferAllocator = new FXJS_ArrayBufferAllocator();
  v8::Isolate::CreateParams params;
  params.array_buffer_allocator = g_arrayBufferAllocator;
  *pResultIsolate = v8::Isolate::New(params);
  return true;
}

size_t FXJS_GlobalIsolateRefCount() {
  return g_isolate_ref_count;
}

// static
void FXJS_PerIsolateData::SetUp(v8::Isolate* pIsolate) {
  if (!pIsolate->GetData(g_embedderDataSlot))
    pIsolate->SetData(g_embedderDataSlot, new FXJS_PerIsolateData());
}

// static
FXJS_PerIsolateData* FXJS_PerIsolateData::Get(v8::Isolate* pIsolate) {
  return static_cast<FXJS_PerIsolateData*>(
      pIsolate->GetData(g_embedderDataSlot));
}

int FXJS_DefineObj(v8::Isolate* pIsolate,
                   const wchar_t* sObjName,
                   FXJSOBJTYPE eObjType,
                   FXJS_CONSTRUCTOR pConstructor,
                   FXJS_DESTRUCTOR pDestructor) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);

  FXJS_PerIsolateData::SetUp(pIsolate);
  CFXJS_ObjDefinition* pObjDef = new CFXJS_ObjDefinition(
      pIsolate, sObjName, eObjType, pConstructor, pDestructor);
  return pObjDef->AssignID();
}

void FXJS_DefineObjMethod(v8::Isolate* pIsolate,
                          int nObjDefnID,
                          const wchar_t* sMethodName,
                          v8::FunctionCallback pMethodCall) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  CFX_ByteString bsMethodName = CFX_WideString(sMethodName).UTF8Encode();
  CFXJS_ObjDefinition* pObjDef =
      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
  pObjDef->GetInstanceTemplate()->Set(
      v8::String::NewFromUtf8(pIsolate, bsMethodName.c_str(),
                              v8::NewStringType::kNormal).ToLocalChecked(),
      v8::FunctionTemplate::New(pIsolate, pMethodCall, v8::Local<v8::Value>(),
                                pObjDef->GetSignature()),
      v8::ReadOnly);
}

void FXJS_DefineObjProperty(v8::Isolate* pIsolate,
                            int nObjDefnID,
                            const wchar_t* sPropName,
                            v8::AccessorGetterCallback pPropGet,
                            v8::AccessorSetterCallback pPropPut) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  CFX_ByteString bsPropertyName = CFX_WideString(sPropName).UTF8Encode();
  CFXJS_ObjDefinition* pObjDef =
      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
  pObjDef->GetInstanceTemplate()->SetAccessor(
      v8::String::NewFromUtf8(pIsolate, bsPropertyName.c_str(),
                              v8::NewStringType::kNormal).ToLocalChecked(),
      pPropGet, pPropPut);
}

void FXJS_DefineObjAllProperties(v8::Isolate* pIsolate,
                                 int nObjDefnID,
                                 v8::NamedPropertyQueryCallback pPropQurey,
                                 v8::NamedPropertyGetterCallback pPropGet,
                                 v8::NamedPropertySetterCallback pPropPut,
                                 v8::NamedPropertyDeleterCallback pPropDel) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  CFXJS_ObjDefinition* pObjDef =
      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
  pObjDef->GetInstanceTemplate()->SetNamedPropertyHandler(pPropGet, pPropPut,
                                                          pPropQurey, pPropDel);
}

void FXJS_DefineObjConst(v8::Isolate* pIsolate,
                         int nObjDefnID,
                         const wchar_t* sConstName,
                         v8::Local<v8::Value> pDefault) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  CFX_ByteString bsConstName = CFX_WideString(sConstName).UTF8Encode();
  CFXJS_ObjDefinition* pObjDef =
      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
  pObjDef->GetInstanceTemplate()->Set(pIsolate, bsConstName.c_str(), pDefault);
}

void FXJS_DefineGlobalMethod(v8::Isolate* pIsolate,
                             const wchar_t* sMethodName,
                             v8::FunctionCallback pMethodCall) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  CFX_ByteString bsMethodName = CFX_WideString(sMethodName).UTF8Encode();
  GetGlobalObjectTemplate(pIsolate)->Set(
      v8::String::NewFromUtf8(pIsolate, bsMethodName.c_str(),
                              v8::NewStringType::kNormal).ToLocalChecked(),
      v8::FunctionTemplate::New(pIsolate, pMethodCall), v8::ReadOnly);
}

void FXJS_DefineGlobalConst(v8::Isolate* pIsolate,
                            const wchar_t* sConstName,
                            v8::Local<v8::Value> pDefault) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  CFX_ByteString bsConst = CFX_WideString(sConstName).UTF8Encode();
  GetGlobalObjectTemplate(pIsolate)->Set(
      v8::String::NewFromUtf8(pIsolate, bsConst.c_str(),
                              v8::NewStringType::kNormal).ToLocalChecked(),
      pDefault, v8::ReadOnly);
}

void FXJS_InitializeRuntime(v8::Isolate* pIsolate,
                            IFXJS_Runtime* pFXRuntime,
                            IFXJS_Context* context,
                            v8::Global<v8::Context>& v8PersistentContext) {
  if (pIsolate == g_isolate)
    ++g_isolate_ref_count;

  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  v8::Local<v8::Context> v8Context =
      v8::Context::New(pIsolate, NULL, GetGlobalObjectTemplate(pIsolate));
  v8::Context::Scope context_scope(v8Context);

  FXJS_PerIsolateData::SetUp(pIsolate);
  v8Context->SetAlignedPointerInEmbedderData(kPerContextDataIndex, pFXRuntime);

  int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
  for (int i = 0; i < maxID; ++i) {
    CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
    CFX_ByteString bs = CFX_WideString(pObjDef->m_ObjName).UTF8Encode();
    v8::Local<v8::String> m_ObjName =
        v8::String::NewFromUtf8(pIsolate, bs.c_str(),
                                v8::NewStringType::kNormal,
                                bs.GetLength()).ToLocalChecked();

    if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) {
      v8Context->Global()
          ->GetPrototype()
          ->ToObject(v8Context)
          .ToLocalChecked()
          ->SetAlignedPointerInInternalField(0, new CFXJS_PrivateData(i));

      if (pObjDef->m_pConstructor)
        pObjDef->m_pConstructor(context, v8Context->Global()
                                             ->GetPrototype()
                                             ->ToObject(v8Context)
                                             .ToLocalChecked(),
                                v8Context->Global()
                                    ->GetPrototype()
                                    ->ToObject(v8Context)
                                    .ToLocalChecked());
    } else if (pObjDef->m_ObjType == FXJSOBJTYPE_STATIC) {
      v8::Local<v8::Object> obj = FXJS_NewFxDynamicObj(pIsolate, context, i);
      v8Context->Global()->Set(v8Context, m_ObjName, obj).FromJust();
      pObjDef->m_StaticObj.Reset(pIsolate, obj);
    }
  }
  v8PersistentContext.Reset(pIsolate, v8Context);
}

void FXJS_ReleaseRuntime(v8::Isolate* pIsolate,
                         v8::Global<v8::Context>& v8PersistentContext) {
  if (pIsolate == g_isolate && --g_isolate_ref_count > 0)
    return;

  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::HandleScope handle_scope(pIsolate);
  v8::Local<v8::Context> context =
      v8::Local<v8::Context>::New(pIsolate, v8PersistentContext);
  v8::Context::Scope context_scope(context);

  FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
  if (!pData)
    return;

  int maxID = CFXJS_ObjDefinition::MaxID(pIsolate);
  for (int i = 0; i < maxID; ++i) {
    CFXJS_ObjDefinition* pObjDef = CFXJS_ObjDefinition::ForID(pIsolate, i);
    if (!pObjDef->m_StaticObj.IsEmpty()) {
      v8::Local<v8::Object> pObj =
          v8::Local<v8::Object>::New(pIsolate, pObjDef->m_StaticObj);
      if (pObjDef->m_pDestructor)
        pObjDef->m_pDestructor(pObj);
      FXJS_FreePrivate(pObj);
    }
    delete pObjDef;
  }

  pIsolate->SetData(g_embedderDataSlot, nullptr);
  delete pData;
}

IFXJS_Runtime* FXJS_GetRuntimeFromIsolate(v8::Isolate* pIsolate) {
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return static_cast<IFXJS_Runtime*>(
      context->GetAlignedPointerFromEmbedderData(kPerContextDataIndex));
}

int FXJS_Execute(v8::Isolate* pIsolate,
                 IFXJS_Context* pJSContext,
                 const wchar_t* script,
                 long length,
                 FXJSErr* pError) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::TryCatch try_catch(pIsolate);
  CFX_ByteString bsScript = CFX_WideString(script).UTF8Encode();
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  v8::Local<v8::Script> compiled_script;
  if (!v8::Script::Compile(
           context, v8::String::NewFromUtf8(
                        pIsolate, bsScript.c_str(), v8::NewStringType::kNormal,
                        bsScript.GetLength()).ToLocalChecked())
           .ToLocal(&compiled_script)) {
    v8::String::Utf8Value error(try_catch.Exception());
    // TODO(tsepez): return error via pError->message.
    return -1;
  }

  v8::Local<v8::Value> result;
  if (!compiled_script->Run(context).ToLocal(&result)) {
    v8::String::Utf8Value error(try_catch.Exception());
    // TODO(tsepez): return error via pError->message.
    return -1;
  }
  return 0;
}

v8::Local<v8::Object> FXJS_NewFxDynamicObj(v8::Isolate* pIsolate,
                                           IFXJS_Context* pJSContext,
                                           int nObjDefnID) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  if (nObjDefnID == -1) {
    v8::Local<v8::ObjectTemplate> objTempl = v8::ObjectTemplate::New(pIsolate);
    v8::Local<v8::Object> obj;
    if (!objTempl->NewInstance(context).ToLocal(&obj))
      return v8::Local<v8::Object>();
    return obj;
  }

  FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(pIsolate);
  if (!pData)
    return v8::Local<v8::Object>();

  if (nObjDefnID < 0 || nObjDefnID >= CFXJS_ObjDefinition::MaxID(pIsolate))
    return v8::Local<v8::Object>();

  CFXJS_ObjDefinition* pObjDef =
      CFXJS_ObjDefinition::ForID(pIsolate, nObjDefnID);
  v8::Local<v8::Object> obj;
  if (!pObjDef->GetInstanceTemplate()->NewInstance(context).ToLocal(&obj))
    return v8::Local<v8::Object>();

  obj->SetAlignedPointerInInternalField(0, new CFXJS_PrivateData(nObjDefnID));
  if (pObjDef->m_pConstructor) {
    pObjDef->m_pConstructor(
        pJSContext, obj,
        context->Global()->GetPrototype()->ToObject(context).ToLocalChecked());
  }

  return obj;
}

v8::Local<v8::Object> FXJS_GetThisObj(v8::Isolate* pIsolate) {
  v8::Isolate::Scope isolate_scope(pIsolate);
  if (!FXJS_PerIsolateData::Get(pIsolate))
    return v8::Local<v8::Object>();

  // Return the global object.
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return context->Global()->GetPrototype()->ToObject(context).ToLocalChecked();
}

int FXJS_GetObjDefnID(v8::Local<v8::Object> pObj) {
  if (pObj.IsEmpty() || !pObj->InternalFieldCount())
    return -1;
  CFXJS_PrivateData* pPrivateData =
      (CFXJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
  if (pPrivateData)
    return pPrivateData->ObjDefID;
  return -1;
}

v8::Isolate* FXJS_GetRuntime(v8::Local<v8::Object> pObj) {
  if (pObj.IsEmpty())
    return NULL;
  v8::Local<v8::Context> context = pObj->CreationContext();
  if (context.IsEmpty())
    return NULL;
  return context->GetIsolate();
}

void FXJS_Error(v8::Isolate* pIsolate, const CFX_WideString& message) {
  // Conversion from pdfium's wchar_t wide-strings to v8's uint16_t
  // wide-strings isn't handled by v8, so use UTF8 as a common
  // intermediate format.
  CFX_ByteString utf8_message = message.UTF8Encode();
  pIsolate->ThrowException(
      v8::String::NewFromUtf8(pIsolate, utf8_message.c_str(),
                              v8::NewStringType::kNormal).ToLocalChecked());
}

const wchar_t* FXJS_GetTypeof(v8::Local<v8::Value> pObj) {
  if (pObj.IsEmpty())
    return NULL;
  if (pObj->IsString())
    return kFXJSValueNameString;
  if (pObj->IsNumber())
    return kFXJSValueNameNumber;
  if (pObj->IsBoolean())
    return kFXJSValueNameBoolean;
  if (pObj->IsDate())
    return kFXJSValueNameDate;
  if (pObj->IsObject())
    return kFXJSValueNameObject;
  if (pObj->IsNull())
    return kFXJSValueNameNull;
  if (pObj->IsUndefined())
    return kFXJSValueNameUndefined;
  return NULL;
}

void FXJS_SetPrivate(v8::Isolate* pIsolate,
                     v8::Local<v8::Object> pObj,
                     void* p) {
  if (pObj.IsEmpty() || !pObj->InternalFieldCount())
    return;
  CFXJS_PrivateData* pPrivateData =
      (CFXJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
  if (!pPrivateData)
    return;
  pPrivateData->pPrivate = p;
}

void* FXJS_GetPrivate(v8::Isolate* pIsolate, v8::Local<v8::Object> pObj) {
  if (pObj.IsEmpty())
    return nullptr;
  CFXJS_PrivateData* pPrivateData = nullptr;
  if (pObj->InternalFieldCount()) {
    pPrivateData =
        (CFXJS_PrivateData*)pObj->GetAlignedPointerFromInternalField(0);
  } else {
    // It could be a global proxy object.
    v8::Local<v8::Value> v = pObj->GetPrototype();
    v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
    if (v->IsObject()) {
      pPrivateData = (CFXJS_PrivateData*)v->ToObject(context)
                         .ToLocalChecked()
                         ->GetAlignedPointerFromInternalField(0);
    }
  }
  return pPrivateData ? pPrivateData->pPrivate : nullptr;
}

void FXJS_FreePrivate(void* pPrivateData) {
  delete (CFXJS_PrivateData*)pPrivateData;
}

void FXJS_FreePrivate(v8::Local<v8::Object> pObj) {
  if (pObj.IsEmpty() || !pObj->InternalFieldCount())
    return;
  FXJS_FreePrivate(pObj->GetAlignedPointerFromInternalField(0));
  pObj->SetAlignedPointerInInternalField(0, NULL);
}

v8::Local<v8::String> FXJS_WSToJSString(v8::Isolate* pIsolate,
                                        const wchar_t* PropertyName,
                                        int Len) {
  CFX_WideString ws = CFX_WideString(PropertyName, Len);
  CFX_ByteString bs = ws.UTF8Encode();
  if (!pIsolate)
    pIsolate = v8::Isolate::GetCurrent();
  return v8::String::NewFromUtf8(pIsolate, bs.c_str(),
                                 v8::NewStringType::kNormal).ToLocalChecked();
}

v8::Local<v8::Value> FXJS_GetObjectElement(v8::Isolate* pIsolate,
                                           v8::Local<v8::Object> pObj,
                                           const wchar_t* PropertyName) {
  if (pObj.IsEmpty())
    return v8::Local<v8::Value>();
  v8::Local<v8::Value> val;
  if (!pObj->Get(pIsolate->GetCurrentContext(),
                 FXJS_WSToJSString(pIsolate, PropertyName)).ToLocal(&val))
    return v8::Local<v8::Value>();
  return val;
}

v8::Local<v8::Array> FXJS_GetObjectElementNames(v8::Isolate* pIsolate,
                                                v8::Local<v8::Object> pObj) {
  if (pObj.IsEmpty())
    return v8::Local<v8::Array>();
  v8::Local<v8::Array> val;
  if (!pObj->GetPropertyNames(pIsolate->GetCurrentContext()).ToLocal(&val))
    return v8::Local<v8::Array>();
  return val;
}

void FXJS_PutObjectString(v8::Isolate* pIsolate,
                          v8::Local<v8::Object> pObj,
                          const wchar_t* PropertyName,
                          const wchar_t* sValue)  // VT_string
{
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName),
            FXJS_WSToJSString(pIsolate, sValue)).FromJust();
}

void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
                          v8::Local<v8::Object> pObj,
                          const wchar_t* PropertyName,
                          int nValue) {
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName),
            v8::Int32::New(pIsolate, nValue)).FromJust();
}

void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
                          v8::Local<v8::Object> pObj,
                          const wchar_t* PropertyName,
                          float fValue) {
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName),
            v8::Number::New(pIsolate, (double)fValue)).FromJust();
}

void FXJS_PutObjectNumber(v8::Isolate* pIsolate,
                          v8::Local<v8::Object> pObj,
                          const wchar_t* PropertyName,
                          double dValue) {
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName),
            v8::Number::New(pIsolate, (double)dValue)).FromJust();
}

void FXJS_PutObjectBoolean(v8::Isolate* pIsolate,
                           v8::Local<v8::Object> pObj,
                           const wchar_t* PropertyName,
                           bool bValue) {
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName),
            v8::Boolean::New(pIsolate, bValue)).FromJust();
}

void FXJS_PutObjectObject(v8::Isolate* pIsolate,
                          v8::Local<v8::Object> pObj,
                          const wchar_t* PropertyName,
                          v8::Local<v8::Object> pPut) {
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName), pPut).FromJust();
}

void FXJS_PutObjectNull(v8::Isolate* pIsolate,
                        v8::Local<v8::Object> pObj,
                        const wchar_t* PropertyName) {
  if (pObj.IsEmpty())
    return;
  pObj->Set(pIsolate->GetCurrentContext(),
            FXJS_WSToJSString(pIsolate, PropertyName),
            v8::Local<v8::Object>()).FromJust();
}

v8::Local<v8::Array> FXJS_NewArray(v8::Isolate* pIsolate) {
  return v8::Array::New(pIsolate);
}

unsigned FXJS_PutArrayElement(v8::Isolate* pIsolate,
                              v8::Local<v8::Array> pArray,
                              unsigned index,
                              v8::Local<v8::Value> pValue) {
  if (pArray.IsEmpty())
    return 0;
  if (pArray->Set(pIsolate->GetCurrentContext(), index, pValue).IsNothing())
    return 0;
  return 1;
}

v8::Local<v8::Value> FXJS_GetArrayElement(v8::Isolate* pIsolate,
                                          v8::Local<v8::Array> pArray,
                                          unsigned index) {
  if (pArray.IsEmpty())
    return v8::Local<v8::Value>();
  v8::Local<v8::Value> val;
  if (!pArray->Get(pIsolate->GetCurrentContext(), index).ToLocal(&val))
    return v8::Local<v8::Value>();
  return val;
}

unsigned FXJS_GetArrayLength(v8::Local<v8::Array> pArray) {
  if (pArray.IsEmpty())
    return 0;
  return pArray->Length();
}

v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, int number) {
  return v8::Int32::New(pIsolate, number);
}

v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, double number) {
  return v8::Number::New(pIsolate, number);
}

v8::Local<v8::Value> FXJS_NewNumber(v8::Isolate* pIsolate, float number) {
  return v8::Number::New(pIsolate, (float)number);
}

v8::Local<v8::Value> FXJS_NewBoolean(v8::Isolate* pIsolate, bool b) {
  return v8::Boolean::New(pIsolate, b);
}

v8::Local<v8::Value> FXJS_NewObject(v8::Isolate* pIsolate,
                                    v8::Local<v8::Object> pObj) {
  if (pObj.IsEmpty())
    return v8::Local<v8::Value>();
  return pObj->Clone();
}

v8::Local<v8::Value> FXJS_NewObject2(v8::Isolate* pIsolate,
                                     v8::Local<v8::Array> pObj) {
  if (pObj.IsEmpty())
    return v8::Local<v8::Value>();
  return pObj->Clone();
}

v8::Local<v8::Value> FXJS_NewString(v8::Isolate* pIsolate,
                                    const wchar_t* string) {
  return FXJS_WSToJSString(pIsolate, string);
}

v8::Local<v8::Value> FXJS_NewNull() {
  return v8::Local<v8::Value>();
}

v8::Local<v8::Value> FXJS_NewDate(v8::Isolate* pIsolate, double d) {
  return v8::Date::New(pIsolate->GetCurrentContext(), d).ToLocalChecked();
}

int FXJS_ToInt32(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue) {
  if (pValue.IsEmpty())
    return 0;
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return pValue->ToInt32(context).ToLocalChecked()->Value();
}

bool FXJS_ToBoolean(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue) {
  if (pValue.IsEmpty())
    return false;
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return pValue->ToBoolean(context).ToLocalChecked()->Value();
}

double FXJS_ToNumber(v8::Isolate* pIsolate, v8::Local<v8::Value> pValue) {
  if (pValue.IsEmpty())
    return 0.0;
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return pValue->ToNumber(context).ToLocalChecked()->Value();
}

v8::Local<v8::Object> FXJS_ToObject(v8::Isolate* pIsolate,
                                    v8::Local<v8::Value> pValue) {
  if (pValue.IsEmpty())
    return v8::Local<v8::Object>();
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return pValue->ToObject(context).ToLocalChecked();
}

CFX_WideString FXJS_ToString(v8::Isolate* pIsolate,
                             v8::Local<v8::Value> pValue) {
  if (pValue.IsEmpty())
    return L"";
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  v8::String::Utf8Value s(pValue->ToString(context).ToLocalChecked());
  return CFX_WideString::FromUTF8(*s, s.length());
}

v8::Local<v8::Array> FXJS_ToArray(v8::Isolate* pIsolate,
                                  v8::Local<v8::Value> pValue) {
  if (pValue.IsEmpty())
    return v8::Local<v8::Array>();
  v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
  return v8::Local<v8::Array>::Cast(pValue->ToObject(context).ToLocalChecked());
}

void FXJS_ValueCopy(v8::Local<v8::Value>& pTo, v8::Local<v8::Value> pFrom) {
  pTo = pFrom;
}