1 // Copyright 2014 PDFium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6
7 #include "fxjs/xfa/cfxjse_value.h"
8
9 #include <math.h>
10
11 #include "fxjs/xfa/cfxjse_class.h"
12 #include "fxjs/xfa/cfxjse_context.h"
13 #include "fxjs/xfa/cfxjse_isolatetracker.h"
14
15 namespace {
16
ftod(float fNumber)17 double ftod(float fNumber) {
18 static_assert(sizeof(float) == 4, "float of incorrect size");
19
20 uint32_t nFloatBits = (uint32_t&)fNumber;
21 uint8_t nExponent = (uint8_t)(nFloatBits >> 23);
22 if (nExponent == 0 || nExponent == 255)
23 return fNumber;
24
25 int8_t nErrExp = nExponent - 150;
26 if (nErrExp >= 0)
27 return fNumber;
28
29 double dwError = pow(2.0, nErrExp), dwErrorHalf = dwError / 2;
30 double dNumber = fNumber, dNumberAbs = fabs(fNumber);
31 double dNumberAbsMin = dNumberAbs - dwErrorHalf,
32 dNumberAbsMax = dNumberAbs + dwErrorHalf;
33 int32_t iErrPos = 0;
34 if (floor(dNumberAbsMin) == floor(dNumberAbsMax)) {
35 dNumberAbsMin = fmod(dNumberAbsMin, 1.0);
36 dNumberAbsMax = fmod(dNumberAbsMax, 1.0);
37 int32_t iErrPosMin = 1, iErrPosMax = 38;
38 do {
39 int32_t iMid = (iErrPosMin + iErrPosMax) / 2;
40 double dPow = pow(10.0, iMid);
41 if (floor(dNumberAbsMin * dPow) == floor(dNumberAbsMax * dPow)) {
42 iErrPosMin = iMid + 1;
43 } else {
44 iErrPosMax = iMid;
45 }
46 } while (iErrPosMin < iErrPosMax);
47 iErrPos = iErrPosMax;
48 }
49 double dPow = pow(10.0, iErrPos);
50 return fNumber < 0 ? ceil(dNumber * dPow - 0.5) / dPow
51 : floor(dNumber * dPow + 0.5) / dPow;
52 }
53
54 } // namespace
55
FXJSE_ThrowMessage(ByteStringView utf8Message)56 void FXJSE_ThrowMessage(ByteStringView utf8Message) {
57 v8::Isolate* pIsolate = v8::Isolate::GetCurrent();
58 ASSERT(pIsolate);
59
60 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(pIsolate);
61 v8::Local<v8::String> hMessage =
62 v8::String::NewFromUtf8(pIsolate, utf8Message.unterminated_c_str(),
63 v8::NewStringType::kNormal,
64 utf8Message.GetLength())
65 .ToLocalChecked();
66 v8::Local<v8::Value> hError = v8::Exception::Error(hMessage);
67 pIsolate->ThrowException(hError);
68 }
69
CFXJSE_Value(v8::Isolate * pIsolate)70 CFXJSE_Value::CFXJSE_Value(v8::Isolate* pIsolate) : m_pIsolate(pIsolate) {}
71
~CFXJSE_Value()72 CFXJSE_Value::~CFXJSE_Value() {}
73
ToHostObject() const74 CFXJSE_HostObject* CFXJSE_Value::ToHostObject() const {
75 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
76 v8::Local<v8::Value> pValue =
77 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
78 ASSERT(!pValue.IsEmpty());
79 if (!pValue->IsObject())
80 return nullptr;
81
82 return FXJSE_RetrieveObjectBinding(pValue.As<v8::Object>());
83 }
84
SetHostObject(CFXJSE_HostObject * lpObject,CFXJSE_Class * pClass)85 void CFXJSE_Value::SetHostObject(CFXJSE_HostObject* lpObject,
86 CFXJSE_Class* pClass) {
87 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
88 v8::Local<v8::FunctionTemplate> hClass =
89 v8::Local<v8::FunctionTemplate>::New(GetIsolate(), pClass->m_hTemplate);
90 v8::Local<v8::Object> hObject =
91 hClass->InstanceTemplate()
92 ->NewInstance(GetIsolate()->GetCurrentContext())
93 .ToLocalChecked();
94 FXJSE_UpdateObjectBinding(hObject, lpObject);
95 m_hValue.Reset(GetIsolate(), hObject);
96 }
97
ClearHostObject()98 void CFXJSE_Value::ClearHostObject() {
99 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
100 FXJSE_ClearObjectBinding(m_hValue.Get(GetIsolate()).As<v8::Object>());
101 v8::Local<v8::Value> hValue = v8::Null(GetIsolate());
102 m_hValue.Reset(GetIsolate(), hValue);
103 }
104
SetArray(const std::vector<std::unique_ptr<CFXJSE_Value>> & values)105 void CFXJSE_Value::SetArray(
106 const std::vector<std::unique_ptr<CFXJSE_Value>>& values) {
107 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
108 v8::Local<v8::Array> hArrayObject =
109 v8::Array::New(GetIsolate(), values.size());
110 v8::Local<v8::Context> context = GetIsolate()->GetCurrentContext();
111 uint32_t count = 0;
112 for (auto& v : values) {
113 if (v->IsEmpty())
114 v->SetUndefined();
115 hArrayObject
116 ->Set(
117 context, count++,
118 v8::Local<v8::Value>::New(GetIsolate(), v.get()->DirectGetValue()))
119 .FromJust();
120 }
121 m_hValue.Reset(GetIsolate(), hArrayObject);
122 }
123
SetFloat(float fFloat)124 void CFXJSE_Value::SetFloat(float fFloat) {
125 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
126 v8::Local<v8::Value> pValue = v8::Number::New(GetIsolate(), ftod(fFloat));
127 m_hValue.Reset(GetIsolate(), pValue);
128 }
129
SetObjectProperty(ByteStringView szPropName,CFXJSE_Value * lpPropValue)130 bool CFXJSE_Value::SetObjectProperty(ByteStringView szPropName,
131 CFXJSE_Value* lpPropValue) {
132 ASSERT(lpPropValue);
133 if (lpPropValue->IsEmpty())
134 return false;
135
136 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
137 v8::Local<v8::Value> hObject =
138 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
139 if (!hObject->IsObject())
140 return false;
141
142 v8::Local<v8::String> hPropName =
143 v8::String::NewFromUtf8(GetIsolate(), szPropName.unterminated_c_str(),
144 v8::NewStringType::kNormal,
145 szPropName.GetLength())
146 .ToLocalChecked();
147 v8::Local<v8::Value> hPropValue =
148 v8::Local<v8::Value>::New(GetIsolate(), lpPropValue->DirectGetValue());
149 v8::Maybe<bool> result = hObject.As<v8::Object>()->Set(
150 GetIsolate()->GetCurrentContext(), hPropName, hPropValue);
151 return result.IsJust() && result.FromJust();
152 }
153
GetObjectProperty(ByteStringView szPropName,CFXJSE_Value * lpPropValue)154 bool CFXJSE_Value::GetObjectProperty(ByteStringView szPropName,
155 CFXJSE_Value* lpPropValue) {
156 ASSERT(lpPropValue);
157 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
158 v8::Local<v8::Value> hObject =
159 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
160 if (!hObject->IsObject())
161 return false;
162
163 v8::Local<v8::String> hPropName =
164 v8::String::NewFromUtf8(GetIsolate(), szPropName.unterminated_c_str(),
165 v8::NewStringType::kNormal,
166 szPropName.GetLength())
167 .ToLocalChecked();
168 v8::Local<v8::Value> hPropValue =
169 hObject.As<v8::Object>()
170 ->Get(GetIsolate()->GetCurrentContext(), hPropName)
171 .ToLocalChecked();
172 lpPropValue->ForceSetValue(hPropValue);
173 return true;
174 }
175
GetObjectPropertyByIdx(uint32_t uPropIdx,CFXJSE_Value * lpPropValue)176 bool CFXJSE_Value::GetObjectPropertyByIdx(uint32_t uPropIdx,
177 CFXJSE_Value* lpPropValue) {
178 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
179 v8::Local<v8::Value> hObject =
180 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
181 if (!hObject->IsObject())
182 return false;
183
184 v8::Local<v8::Value> hPropValue =
185 hObject.As<v8::Object>()
186 ->Get(GetIsolate()->GetCurrentContext(), uPropIdx)
187 .ToLocalChecked();
188 lpPropValue->ForceSetValue(hPropValue);
189 return true;
190 }
191
DeleteObjectProperty(ByteStringView szPropName)192 bool CFXJSE_Value::DeleteObjectProperty(ByteStringView szPropName) {
193 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
194 v8::Local<v8::Value> hObject =
195 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
196 if (!hObject->IsObject())
197 return false;
198
199 v8::Local<v8::String> hPropName =
200 v8::String::NewFromUtf8(GetIsolate(), szPropName.unterminated_c_str(),
201 v8::NewStringType::kNormal,
202 szPropName.GetLength())
203 .ToLocalChecked();
204 return hObject.As<v8::Object>()
205 ->Delete(GetIsolate()->GetCurrentContext(), hPropName)
206 .FromJust();
207 }
208
HasObjectOwnProperty(ByteStringView szPropName,bool bUseTypeGetter)209 bool CFXJSE_Value::HasObjectOwnProperty(ByteStringView szPropName,
210 bool bUseTypeGetter) {
211 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
212 v8::Local<v8::Value> hObject =
213 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
214 if (!hObject->IsObject())
215 return false;
216
217 v8::Local<v8::String> hKey =
218 v8::String::NewFromUtf8(GetIsolate(), szPropName.unterminated_c_str(),
219 v8::NewStringType::kNormal,
220 szPropName.GetLength())
221 .ToLocalChecked();
222 return hObject.As<v8::Object>()
223 ->HasRealNamedProperty(GetIsolate()->GetCurrentContext(), hKey)
224 .FromJust() ||
225 (bUseTypeGetter &&
226 hObject.As<v8::Object>()
227 ->HasOwnProperty(GetIsolate()->GetCurrentContext(), hKey)
228 .FromMaybe(false));
229 }
230
SetObjectOwnProperty(ByteStringView szPropName,CFXJSE_Value * lpPropValue)231 bool CFXJSE_Value::SetObjectOwnProperty(ByteStringView szPropName,
232 CFXJSE_Value* lpPropValue) {
233 ASSERT(lpPropValue);
234 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
235 v8::Local<v8::Value> hObject =
236 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
237 if (!hObject->IsObject())
238 return false;
239
240 v8::Local<v8::String> hPropName =
241 v8::String::NewFromUtf8(GetIsolate(), szPropName.unterminated_c_str(),
242 v8::NewStringType::kNormal,
243 szPropName.GetLength())
244 .ToLocalChecked();
245 v8::Local<v8::Value> pValue =
246 v8::Local<v8::Value>::New(GetIsolate(), lpPropValue->m_hValue);
247 return hObject.As<v8::Object>()
248 ->DefineOwnProperty(GetIsolate()->GetCurrentContext(), hPropName, pValue)
249 .FromMaybe(false);
250 }
251
SetFunctionBind(CFXJSE_Value * lpOldFunction,CFXJSE_Value * lpNewThis)252 bool CFXJSE_Value::SetFunctionBind(CFXJSE_Value* lpOldFunction,
253 CFXJSE_Value* lpNewThis) {
254 ASSERT(lpOldFunction);
255 ASSERT(lpNewThis);
256
257 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
258 v8::Local<v8::Value> rgArgs[2];
259 v8::Local<v8::Value> hOldFunction =
260 v8::Local<v8::Value>::New(GetIsolate(), lpOldFunction->DirectGetValue());
261 if (hOldFunction.IsEmpty() || !hOldFunction->IsFunction())
262 return false;
263
264 rgArgs[0] = hOldFunction;
265 v8::Local<v8::Value> hNewThis =
266 v8::Local<v8::Value>::New(GetIsolate(), lpNewThis->DirectGetValue());
267 if (hNewThis.IsEmpty())
268 return false;
269
270 rgArgs[1] = hNewThis;
271 v8::Local<v8::String> hBinderFuncSource =
272 v8::String::NewFromUtf8(GetIsolate(),
273 "(function (oldfunction, newthis) { return "
274 "oldfunction.bind(newthis); })",
275 v8::NewStringType::kNormal)
276 .ToLocalChecked();
277 v8::Local<v8::Context> hContext = GetIsolate()->GetCurrentContext();
278 v8::Local<v8::Function> hBinderFunc =
279 v8::Script::Compile(hContext, hBinderFuncSource)
280 .ToLocalChecked()
281 ->Run(hContext)
282 .ToLocalChecked()
283 .As<v8::Function>();
284 v8::Local<v8::Value> hBoundFunction =
285 hBinderFunc->Call(hContext, hContext->Global(), 2, rgArgs)
286 .ToLocalChecked();
287 if (hBoundFunction.IsEmpty() || !hBoundFunction->IsFunction())
288 return false;
289
290 m_hValue.Reset(GetIsolate(), hBoundFunction);
291 return true;
292 }
293
IsEmpty() const294 bool CFXJSE_Value::IsEmpty() const {
295 return m_hValue.IsEmpty();
296 }
297
IsUndefined() const298 bool CFXJSE_Value::IsUndefined() const {
299 if (IsEmpty())
300 return false;
301
302 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
303 v8::Local<v8::Value> hValue =
304 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
305 return hValue->IsUndefined();
306 }
307
IsNull() const308 bool CFXJSE_Value::IsNull() const {
309 if (IsEmpty())
310 return false;
311
312 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
313 v8::Local<v8::Value> hValue =
314 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
315 return hValue->IsNull();
316 }
317
IsBoolean() const318 bool CFXJSE_Value::IsBoolean() const {
319 if (IsEmpty())
320 return false;
321
322 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
323 v8::Local<v8::Value> hValue =
324 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
325 return hValue->IsBoolean();
326 }
327
IsString() const328 bool CFXJSE_Value::IsString() const {
329 if (IsEmpty())
330 return false;
331
332 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
333 v8::Local<v8::Value> hValue =
334 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
335 return hValue->IsString();
336 }
337
IsNumber() const338 bool CFXJSE_Value::IsNumber() const {
339 if (IsEmpty())
340 return false;
341
342 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
343 v8::Local<v8::Value> hValue =
344 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
345 return hValue->IsNumber();
346 }
347
IsInteger() const348 bool CFXJSE_Value::IsInteger() const {
349 if (IsEmpty())
350 return false;
351
352 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
353 v8::Local<v8::Value> hValue =
354 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
355 return hValue->IsInt32();
356 }
357
IsObject() const358 bool CFXJSE_Value::IsObject() const {
359 if (IsEmpty())
360 return false;
361
362 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
363 v8::Local<v8::Value> hValue =
364 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
365 return hValue->IsObject();
366 }
367
IsArray() const368 bool CFXJSE_Value::IsArray() const {
369 if (IsEmpty())
370 return false;
371
372 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
373 v8::Local<v8::Value> hValue =
374 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
375 return hValue->IsArray();
376 }
377
IsFunction() const378 bool CFXJSE_Value::IsFunction() const {
379 if (IsEmpty())
380 return false;
381
382 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
383 v8::Local<v8::Value> hValue =
384 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
385 return hValue->IsFunction();
386 }
387
ToBoolean() const388 bool CFXJSE_Value::ToBoolean() const {
389 ASSERT(!IsEmpty());
390 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
391 v8::Local<v8::Value> hValue =
392 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
393 return hValue->BooleanValue(GetIsolate());
394 }
395
ToFloat() const396 float CFXJSE_Value::ToFloat() const {
397 ASSERT(!IsEmpty());
398 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
399 v8::Local<v8::Value> hValue =
400 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
401 return static_cast<float>(
402 hValue->NumberValue(GetIsolate()->GetCurrentContext()).FromMaybe(0.0));
403 }
404
ToDouble() const405 double CFXJSE_Value::ToDouble() const {
406 ASSERT(!IsEmpty());
407 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
408 v8::Local<v8::Value> hValue =
409 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
410 return hValue->NumberValue(GetIsolate()->GetCurrentContext()).FromMaybe(0.0);
411 }
412
ToInteger() const413 int32_t CFXJSE_Value::ToInteger() const {
414 ASSERT(!IsEmpty());
415 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
416 v8::Local<v8::Value> hValue =
417 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
418 return static_cast<int32_t>(
419 hValue->NumberValue(GetIsolate()->GetCurrentContext()).FromMaybe(0.0));
420 }
421
ToString() const422 ByteString CFXJSE_Value::ToString() const {
423 ASSERT(!IsEmpty());
424 CFXJSE_ScopeUtil_IsolateHandleRootContext scope(GetIsolate());
425 v8::Local<v8::Value> hValue =
426 v8::Local<v8::Value>::New(GetIsolate(), m_hValue);
427 v8::Local<v8::String> hString =
428 hValue->ToString(GetIsolate()->GetCurrentContext()).ToLocalChecked();
429 v8::String::Utf8Value hStringVal(GetIsolate(), hString);
430 return ByteString(*hStringVal);
431 }
432
SetUndefined()433 void CFXJSE_Value::SetUndefined() {
434 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
435 v8::Local<v8::Value> hValue = v8::Undefined(GetIsolate());
436 m_hValue.Reset(GetIsolate(), hValue);
437 }
438
SetNull()439 void CFXJSE_Value::SetNull() {
440 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
441 v8::Local<v8::Value> hValue = v8::Null(GetIsolate());
442 m_hValue.Reset(GetIsolate(), hValue);
443 }
444
SetBoolean(bool bBoolean)445 void CFXJSE_Value::SetBoolean(bool bBoolean) {
446 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
447 v8::Local<v8::Value> hValue = v8::Boolean::New(GetIsolate(), !!bBoolean);
448 m_hValue.Reset(GetIsolate(), hValue);
449 }
450
SetInteger(int32_t nInteger)451 void CFXJSE_Value::SetInteger(int32_t nInteger) {
452 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
453 v8::Local<v8::Value> hValue = v8::Integer::New(GetIsolate(), nInteger);
454 m_hValue.Reset(GetIsolate(), hValue);
455 }
456
SetDouble(double dDouble)457 void CFXJSE_Value::SetDouble(double dDouble) {
458 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
459 v8::Local<v8::Value> hValue = v8::Number::New(GetIsolate(), dDouble);
460 m_hValue.Reset(GetIsolate(), hValue);
461 }
462
SetString(ByteStringView szString)463 void CFXJSE_Value::SetString(ByteStringView szString) {
464 CFXJSE_ScopeUtil_IsolateHandle scope(GetIsolate());
465 v8::Local<v8::Value> hValue =
466 v8::String::NewFromUtf8(GetIsolate(), szString.unterminated_c_str(),
467 v8::NewStringType::kNormal, szString.GetLength())
468 .ToLocalChecked();
469 m_hValue.Reset(GetIsolate(), hValue);
470 }
471