1 // Copyright 2014 The PDFium Authors
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/js_define.h"
8
9 #include <math.h>
10 #include <stdarg.h>
11
12 #include <algorithm>
13 #include <limits>
14 #include <vector>
15
16 #include "core/fxcrt/fx_extension.h"
17 #include "fxjs/cjs_document.h"
18 #include "fxjs/cjs_object.h"
19 #include "fxjs/fx_date_helpers.h"
20 #include "fxjs/fxv8.h"
21 #include "third_party/base/check.h"
22 #include "v8/include/v8-context.h"
23 #include "v8/include/v8-function.h"
24 #include "v8/include/v8-isolate.h"
25
JSDestructor(v8::Local<v8::Object> obj)26 void JSDestructor(v8::Local<v8::Object> obj) {
27 CFXJS_Engine::SetObjectPrivate(obj, nullptr);
28 }
29
JS_DateParse(v8::Isolate * pIsolate,const WideString & str)30 double JS_DateParse(v8::Isolate* pIsolate, const WideString& str) {
31 v8::Isolate::Scope isolate_scope(pIsolate);
32 v8::HandleScope scope(pIsolate);
33
34 v8::Local<v8::Context> context = pIsolate->GetCurrentContext();
35
36 // Use the built-in object method.
37 v8::MaybeLocal<v8::Value> maybe_value =
38 context->Global()->Get(context, fxv8::NewStringHelper(pIsolate, "Date"));
39
40 v8::Local<v8::Value> value;
41 if (!maybe_value.ToLocal(&value) || !value->IsObject())
42 return 0;
43
44 v8::Local<v8::Object> obj = value.As<v8::Object>();
45 maybe_value = obj->Get(context, fxv8::NewStringHelper(pIsolate, "parse"));
46 if (!maybe_value.ToLocal(&value) || !value->IsFunction())
47 return 0;
48
49 v8::Local<v8::Function> func = value.As<v8::Function>();
50 static constexpr int argc = 1;
51 v8::Local<v8::Value> argv[argc] = {
52 fxv8::NewStringHelper(pIsolate, str.AsStringView()),
53 };
54 maybe_value = func->Call(context, context->Global(), argc, argv);
55 if (!maybe_value.ToLocal(&value) || !value->IsNumber())
56 return 0;
57
58 double date = value.As<v8::Number>()->Value();
59 return isfinite(date) ? FX_LocalTime(date) : date;
60 }
61
ExpandKeywordParams(CJS_Runtime * pRuntime,const std::vector<v8::Local<v8::Value>> & originals,size_t nKeywords,...)62 std::vector<v8::Local<v8::Value>> ExpandKeywordParams(
63 CJS_Runtime* pRuntime,
64 const std::vector<v8::Local<v8::Value>>& originals,
65 size_t nKeywords,
66 ...) {
67 DCHECK(nKeywords);
68
69 std::vector<v8::Local<v8::Value>> result(nKeywords, v8::Local<v8::Value>());
70 size_t size = std::min(originals.size(), nKeywords);
71 for (size_t i = 0; i < size; ++i)
72 result[i] = originals[i];
73
74 if (originals.size() != 1 || !originals[0]->IsObject() ||
75 originals[0]->IsArray()) {
76 return result;
77 }
78 result[0] = v8::Local<v8::Value>(); // Make unknown.
79
80 v8::Local<v8::Object> pObj = pRuntime->ToObject(originals[0]);
81 va_list ap;
82 va_start(ap, nKeywords);
83 for (size_t i = 0; i < nKeywords; ++i) {
84 const char* property = va_arg(ap, const char*);
85 v8::Local<v8::Value> v8Value = pRuntime->GetObjectProperty(pObj, property);
86 if (!v8Value->IsUndefined())
87 result[i] = v8Value;
88 }
89 va_end(ap);
90
91 return result;
92 }
93
IsExpandedParamKnown(v8::Local<v8::Value> value)94 bool IsExpandedParamKnown(v8::Local<v8::Value> value) {
95 return !value.IsEmpty() &&
96 (value->IsString() || value->IsNumber() || value->IsBoolean() ||
97 value->IsDate() || value->IsObject() || value->IsNull() ||
98 value->IsUndefined());
99 }
100