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/cjs_runtime.h"
8
9 #include <algorithm>
10
11 #include "fpdfsdk/cpdfsdk_formfillenvironment.h"
12 #include "fxjs/cfx_globaldata.h"
13 #include "fxjs/cjs_annot.h"
14 #include "fxjs/cjs_app.h"
15 #include "fxjs/cjs_border.h"
16 #include "fxjs/cjs_color.h"
17 #include "fxjs/cjs_console.h"
18 #include "fxjs/cjs_display.h"
19 #include "fxjs/cjs_document.h"
20 #include "fxjs/cjs_event.h"
21 #include "fxjs/cjs_event_context.h"
22 #include "fxjs/cjs_eventrecorder.h"
23 #include "fxjs/cjs_field.h"
24 #include "fxjs/cjs_font.h"
25 #include "fxjs/cjs_global.h"
26 #include "fxjs/cjs_globalarrays.h"
27 #include "fxjs/cjs_globalconsts.h"
28 #include "fxjs/cjs_highlight.h"
29 #include "fxjs/cjs_icon.h"
30 #include "fxjs/cjs_object.h"
31 #include "fxjs/cjs_position.h"
32 #include "fxjs/cjs_publicmethods.h"
33 #include "fxjs/cjs_scalehow.h"
34 #include "fxjs/cjs_scalewhen.h"
35 #include "fxjs/cjs_style.h"
36 #include "fxjs/cjs_timerobj.h"
37 #include "fxjs/cjs_util.h"
38 #include "fxjs/cjs_zoomtype.h"
39 #include "fxjs/js_define.h"
40 #include "third_party/base/ptr_util.h"
41
CJS_Runtime(CPDFSDK_FormFillEnvironment * pFormFillEnv)42 CJS_Runtime::CJS_Runtime(CPDFSDK_FormFillEnvironment* pFormFillEnv)
43 : m_pFormFillEnv(pFormFillEnv) {
44 v8::Isolate* pIsolate = nullptr;
45 IPDF_JSPLATFORM* pPlatform = m_pFormFillEnv->GetFormFillInfo()->m_pJsPlatform;
46 if (pPlatform->version <= 2) {
47 unsigned int embedderDataSlot = 0;
48 v8::Isolate* pExternalIsolate = nullptr;
49 if (pPlatform->version == 2) {
50 pExternalIsolate = static_cast<v8::Isolate*>(pPlatform->m_isolate);
51 embedderDataSlot = pPlatform->m_v8EmbedderSlot;
52 }
53 FXJS_Initialize(embedderDataSlot, pExternalIsolate);
54 }
55 m_isolateManaged = FXJS_GetIsolate(&pIsolate);
56 SetIsolate(pIsolate);
57
58 v8::Isolate::Scope isolate_scope(pIsolate);
59 v8::HandleScope handle_scope(pIsolate);
60 if (m_isolateManaged || FXJS_GlobalIsolateRefCount() == 0)
61 DefineJSObjects();
62
63 ScopedEventContext pContext(this);
64 InitializeEngine();
65 SetFormFillEnvToDocument();
66 }
67
~CJS_Runtime()68 CJS_Runtime::~CJS_Runtime() {
69 NotifyObservers();
70 ReleaseEngine();
71 if (m_isolateManaged)
72 DisposeIsolate();
73 }
74
DefineJSObjects()75 void CJS_Runtime::DefineJSObjects() {
76 v8::Isolate::Scope isolate_scope(GetIsolate());
77 v8::HandleScope handle_scope(GetIsolate());
78 v8::Local<v8::Context> context = v8::Context::New(GetIsolate());
79 v8::Context::Scope context_scope(context);
80
81 // The call order determines the "ObjDefID" assigned to each class.
82 // ObjDefIDs 0 - 2
83 CJS_Border::DefineJSObjects(this);
84 CJS_Display::DefineJSObjects(this);
85 CJS_Font::DefineJSObjects(this);
86
87 // ObjDefIDs 3 - 5
88 CJS_Highlight::DefineJSObjects(this);
89 CJS_Position::DefineJSObjects(this);
90 CJS_ScaleHow::DefineJSObjects(this);
91
92 // ObjDefIDs 6 - 8
93 CJS_ScaleWhen::DefineJSObjects(this);
94 CJS_Style::DefineJSObjects(this);
95 CJS_Zoomtype::DefineJSObjects(this);
96
97 // ObjDefIDs 9 - 11
98 CJS_App::DefineJSObjects(this);
99 CJS_Color::DefineJSObjects(this);
100 CJS_Console::DefineJSObjects(this);
101
102 // ObjDefIDs 12 - 14
103 CJS_Document::DefineJSObjects(this);
104 CJS_Event::DefineJSObjects(this);
105 CJS_Field::DefineJSObjects(this);
106
107 // ObjDefIDs 15 - 17
108 CJS_Global::DefineJSObjects(this);
109 CJS_Icon::DefineJSObjects(this);
110 CJS_Util::DefineJSObjects(this);
111
112 // ObjDefIDs 18 - 20 (these can't fail, return void).
113 CJS_PublicMethods::DefineJSObjects(this);
114 CJS_GlobalConsts::DefineJSObjects(this);
115 CJS_GlobalArrays::DefineJSObjects(this);
116
117 // ObjDefIDs 21 - 22.
118 CJS_TimerObj::DefineJSObjects(this);
119 CJS_Annot::DefineJSObjects(this);
120 }
121
NewEventContext()122 IJS_EventContext* CJS_Runtime::NewEventContext() {
123 m_EventContextArray.push_back(pdfium::MakeUnique<CJS_EventContext>(this));
124 return m_EventContextArray.back().get();
125 }
126
ReleaseEventContext(IJS_EventContext * pContext)127 void CJS_Runtime::ReleaseEventContext(IJS_EventContext* pContext) {
128 ASSERT(pContext == m_EventContextArray.back().get());
129 m_EventContextArray.pop_back();
130 }
131
GetCurrentEventContext() const132 CJS_EventContext* CJS_Runtime::GetCurrentEventContext() const {
133 return m_EventContextArray.empty() ? nullptr
134 : m_EventContextArray.back().get();
135 }
136
GetTimerHandler() const137 TimerHandlerIface* CJS_Runtime::GetTimerHandler() const {
138 return m_pFormFillEnv ? m_pFormFillEnv->GetTimerHandler() : nullptr;
139 }
140
SetFormFillEnvToDocument()141 void CJS_Runtime::SetFormFillEnvToDocument() {
142 v8::Isolate::Scope isolate_scope(GetIsolate());
143 v8::HandleScope handle_scope(GetIsolate());
144 v8::Local<v8::Context> context = GetV8Context();
145 v8::Context::Scope context_scope(context);
146
147 v8::Local<v8::Object> pThis = GetThisObj();
148 if (pThis.IsEmpty())
149 return;
150
151 auto pJSDocument = JSGetObject<CJS_Document>(pThis);
152 if (!pJSDocument)
153 return;
154
155 pJSDocument->SetFormFillEnv(m_pFormFillEnv.Get());
156 }
157
GetFormFillEnv() const158 CPDFSDK_FormFillEnvironment* CJS_Runtime::GetFormFillEnv() const {
159 return m_pFormFillEnv.Get();
160 }
161
ExecuteScript(const WideString & script)162 Optional<IJS_Runtime::JS_Error> CJS_Runtime::ExecuteScript(
163 const WideString& script) {
164 return Execute(script);
165 }
166
AddEventToSet(const FieldEvent & event)167 bool CJS_Runtime::AddEventToSet(const FieldEvent& event) {
168 return m_FieldEventSet.insert(event).second;
169 }
170
RemoveEventFromSet(const FieldEvent & event)171 void CJS_Runtime::RemoveEventFromSet(const FieldEvent& event) {
172 m_FieldEventSet.erase(event);
173 }
174
AsCJSRuntime()175 CJS_Runtime* CJS_Runtime::AsCJSRuntime() {
176 return this;
177 }
178
GetValueByNameFromGlobalObject(ByteStringView utf8Name,v8::Local<v8::Value> * pValue)179 bool CJS_Runtime::GetValueByNameFromGlobalObject(ByteStringView utf8Name,
180 v8::Local<v8::Value>* pValue) {
181 v8::Isolate::Scope isolate_scope(GetIsolate());
182 v8::Local<v8::Context> context = GetV8Context();
183 v8::Context::Scope context_scope(context);
184 v8::Local<v8::String> str =
185 v8::String::NewFromUtf8(GetIsolate(), utf8Name.unterminated_c_str(),
186 v8::NewStringType::kNormal, utf8Name.GetLength())
187 .ToLocalChecked();
188 v8::MaybeLocal<v8::Value> maybe_propvalue =
189 context->Global()->Get(context, str);
190 if (maybe_propvalue.IsEmpty())
191 return false;
192
193 *pValue = maybe_propvalue.ToLocalChecked();
194 return true;
195 }
196
SetValueByNameInGlobalObject(ByteStringView utf8Name,v8::Local<v8::Value> pValue)197 bool CJS_Runtime::SetValueByNameInGlobalObject(ByteStringView utf8Name,
198 v8::Local<v8::Value> pValue) {
199 if (utf8Name.IsEmpty() || pValue.IsEmpty())
200 return false;
201
202 v8::Isolate* pIsolate = GetIsolate();
203 v8::Isolate::Scope isolate_scope(pIsolate);
204 v8::Local<v8::Context> context = GetV8Context();
205 v8::Context::Scope context_scope(context);
206 v8::Local<v8::String> str =
207 v8::String::NewFromUtf8(pIsolate, utf8Name.unterminated_c_str(),
208 v8::NewStringType::kNormal, utf8Name.GetLength())
209 .ToLocalChecked();
210 v8::Maybe<bool> result = context->Global()->Set(context, str, pValue);
211 return result.IsJust() && result.FromJust();
212 }
213
MaybeCoerceToNumber(v8::Local<v8::Value> value)214 v8::Local<v8::Value> CJS_Runtime::MaybeCoerceToNumber(
215 v8::Local<v8::Value> value) {
216 bool bAllowNaN = false;
217 if (value->IsString()) {
218 ByteString bstr = ToWideString(value).ToDefANSI();
219 if (bstr.IsEmpty())
220 return value;
221 if (bstr == "NaN")
222 bAllowNaN = true;
223 }
224
225 v8::Isolate* pIsolate = GetIsolate();
226 v8::TryCatch try_catch(pIsolate);
227 v8::MaybeLocal<v8::Number> maybeNum =
228 value->ToNumber(pIsolate->GetCurrentContext());
229 if (maybeNum.IsEmpty())
230 return value;
231
232 v8::Local<v8::Number> num = maybeNum.ToLocalChecked();
233 if (std::isnan(num->Value()) && !bAllowNaN)
234 return value;
235
236 return num;
237 }
238