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/cjs_runtime.h"
8
9 #include <math.h>
10
11 #include <algorithm>
12
13 #include "fpdfsdk/cpdfsdk_formfillenvironment.h"
14 #include "fxjs/cfx_globaldata.h"
15 #include "fxjs/cjs_annot.h"
16 #include "fxjs/cjs_app.h"
17 #include "fxjs/cjs_border.h"
18 #include "fxjs/cjs_color.h"
19 #include "fxjs/cjs_console.h"
20 #include "fxjs/cjs_display.h"
21 #include "fxjs/cjs_document.h"
22 #include "fxjs/cjs_event.h"
23 #include "fxjs/cjs_event_context.h"
24 #include "fxjs/cjs_field.h"
25 #include "fxjs/cjs_font.h"
26 #include "fxjs/cjs_global.h"
27 #include "fxjs/cjs_globalarrays.h"
28 #include "fxjs/cjs_globalconsts.h"
29 #include "fxjs/cjs_highlight.h"
30 #include "fxjs/cjs_icon.h"
31 #include "fxjs/cjs_object.h"
32 #include "fxjs/cjs_position.h"
33 #include "fxjs/cjs_publicmethods.h"
34 #include "fxjs/cjs_scalehow.h"
35 #include "fxjs/cjs_scalewhen.h"
36 #include "fxjs/cjs_style.h"
37 #include "fxjs/cjs_timerobj.h"
38 #include "fxjs/cjs_util.h"
39 #include "fxjs/cjs_zoomtype.h"
40 #include "fxjs/fxv8.h"
41 #include "fxjs/js_define.h"
42 #include "third_party/base/check_op.h"
43 #include "v8/include/v8-context.h"
44 #include "v8/include/v8-exception.h"
45 #include "v8/include/v8-isolate.h"
46
CJS_Runtime(CPDFSDK_FormFillEnvironment * pFormFillEnv)47 CJS_Runtime::CJS_Runtime(CPDFSDK_FormFillEnvironment* pFormFillEnv)
48 : m_pFormFillEnv(pFormFillEnv) {
49 v8::Isolate* pIsolate = nullptr;
50 IPDF_JSPLATFORM* pPlatform = m_pFormFillEnv->GetFormFillInfo()->m_pJsPlatform;
51 if (pPlatform->version <= 2) {
52 // Backwards compatibility - JS now initialized earlier in more modern
53 // JSPLATFORM versions.
54 unsigned int embedderDataSlot = 0;
55 v8::Isolate* pExternalIsolate = nullptr;
56 if (pPlatform->version == 2) {
57 pExternalIsolate = static_cast<v8::Isolate*>(pPlatform->m_isolate);
58 embedderDataSlot = pPlatform->m_v8EmbedderSlot;
59 }
60 FXJS_Initialize(embedderDataSlot, pExternalIsolate);
61 }
62 m_isolateManaged = FXJS_GetIsolate(&pIsolate);
63 SetIsolate(pIsolate);
64
65 v8::Isolate::Scope isolate_scope(pIsolate);
66 v8::HandleScope handle_scope(pIsolate);
67 if (m_isolateManaged || FXJS_GlobalIsolateRefCount() == 0)
68 DefineJSObjects();
69
70 ScopedEventContext pContext(this);
71 InitializeEngine();
72 SetFormFillEnvToDocument();
73 }
74
~CJS_Runtime()75 CJS_Runtime::~CJS_Runtime() {
76 NotifyObservers();
77 ReleaseEngine();
78 if (m_isolateManaged)
79 DisposeIsolate();
80 }
81
DefineJSObjects()82 void CJS_Runtime::DefineJSObjects() {
83 v8::Isolate::Scope isolate_scope(GetIsolate());
84 v8::HandleScope handle_scope(GetIsolate());
85 v8::Local<v8::Context> context = v8::Context::New(GetIsolate());
86 v8::Context::Scope context_scope(context);
87
88 // The call order determines the "ObjDefID" assigned to each class.
89 // ObjDefIDs 0 - 2
90 CJS_Border::DefineJSObjects(this);
91 CJS_Display::DefineJSObjects(this);
92 CJS_Font::DefineJSObjects(this);
93
94 // ObjDefIDs 3 - 5
95 CJS_Highlight::DefineJSObjects(this);
96 CJS_Position::DefineJSObjects(this);
97 CJS_ScaleHow::DefineJSObjects(this);
98
99 // ObjDefIDs 6 - 8
100 CJS_ScaleWhen::DefineJSObjects(this);
101 CJS_Style::DefineJSObjects(this);
102 CJS_Zoomtype::DefineJSObjects(this);
103
104 // ObjDefIDs 9 - 11
105 CJS_App::DefineJSObjects(this);
106 CJS_Color::DefineJSObjects(this);
107 CJS_Console::DefineJSObjects(this);
108
109 // ObjDefIDs 12 - 14
110 CJS_Document::DefineJSObjects(this);
111 CJS_Event::DefineJSObjects(this);
112 CJS_Field::DefineJSObjects(this);
113
114 // ObjDefIDs 15 - 17
115 CJS_Global::DefineJSObjects(this);
116 CJS_Icon::DefineJSObjects(this);
117 CJS_Util::DefineJSObjects(this);
118
119 // ObjDefIDs 18 - 20 (these can't fail, return void).
120 CJS_PublicMethods::DefineJSObjects(this);
121 CJS_GlobalConsts::DefineJSObjects(this);
122 CJS_GlobalArrays::DefineJSObjects(this);
123
124 // ObjDefIDs 21 - 22.
125 CJS_TimerObj::DefineJSObjects(this);
126 CJS_Annot::DefineJSObjects(this);
127 }
128
NewEventContext()129 IJS_EventContext* CJS_Runtime::NewEventContext() {
130 m_EventContextArray.push_back(std::make_unique<CJS_EventContext>(this));
131 return m_EventContextArray.back().get();
132 }
133
ReleaseEventContext(IJS_EventContext * pContext)134 void CJS_Runtime::ReleaseEventContext(IJS_EventContext* pContext) {
135 DCHECK_EQ(pContext, m_EventContextArray.back().get());
136 m_EventContextArray.pop_back();
137 }
138
GetCurrentEventContext() const139 CJS_EventContext* CJS_Runtime::GetCurrentEventContext() const {
140 return m_EventContextArray.empty() ? nullptr
141 : m_EventContextArray.back().get();
142 }
143
GetTimerHandler() const144 CFX_Timer::HandlerIface* CJS_Runtime::GetTimerHandler() const {
145 return m_pFormFillEnv ? m_pFormFillEnv->GetTimerHandler() : nullptr;
146 }
147
SetFormFillEnvToDocument()148 void CJS_Runtime::SetFormFillEnvToDocument() {
149 v8::Isolate::Scope isolate_scope(GetIsolate());
150 v8::HandleScope handle_scope(GetIsolate());
151 v8::Local<v8::Context> context = GetV8Context();
152 v8::Context::Scope context_scope(context);
153
154 v8::Local<v8::Object> pThis = GetThisObj();
155 if (pThis.IsEmpty())
156 return;
157
158 auto pJSDocument = JSGetObject<CJS_Document>(GetIsolate(), pThis);
159 if (!pJSDocument)
160 return;
161
162 pJSDocument->SetFormFillEnv(m_pFormFillEnv.Get());
163 }
164
GetFormFillEnv() const165 CPDFSDK_FormFillEnvironment* CJS_Runtime::GetFormFillEnv() const {
166 return m_pFormFillEnv.Get();
167 }
168
ExecuteScript(const WideString & script)169 absl::optional<IJS_Runtime::JS_Error> CJS_Runtime::ExecuteScript(
170 const WideString& script) {
171 return Execute(script);
172 }
173
AddEventToSet(const FieldEvent & event)174 bool CJS_Runtime::AddEventToSet(const FieldEvent& event) {
175 return m_FieldEventSet.insert(event).second;
176 }
177
RemoveEventFromSet(const FieldEvent & event)178 void CJS_Runtime::RemoveEventFromSet(const FieldEvent& event) {
179 m_FieldEventSet.erase(event);
180 }
181
AsCJSRuntime()182 CJS_Runtime* CJS_Runtime::AsCJSRuntime() {
183 return this;
184 }
185
GetValueByNameFromGlobalObject(ByteStringView utf8Name)186 v8::Local<v8::Value> CJS_Runtime::GetValueByNameFromGlobalObject(
187 ByteStringView utf8Name) {
188 v8::Isolate::Scope isolate_scope(GetIsolate());
189 v8::Local<v8::Context> context = GetV8Context();
190 v8::Context::Scope context_scope(context);
191 v8::Local<v8::String> str = fxv8::NewStringHelper(GetIsolate(), utf8Name);
192 v8::MaybeLocal<v8::Value> maybe_value = context->Global()->Get(context, str);
193 if (maybe_value.IsEmpty())
194 return v8::Local<v8::Value>();
195 return maybe_value.ToLocalChecked();
196 }
197
SetValueByNameInGlobalObject(ByteStringView utf8Name,v8::Local<v8::Value> pValue)198 bool CJS_Runtime::SetValueByNameInGlobalObject(ByteStringView utf8Name,
199 v8::Local<v8::Value> pValue) {
200 if (utf8Name.IsEmpty() || pValue.IsEmpty())
201 return false;
202
203 v8::Isolate* pIsolate = GetIsolate();
204 v8::Isolate::Scope isolate_scope(pIsolate);
205 v8::Local<v8::Context> context = GetV8Context();
206 v8::Context::Scope context_scope(context);
207 v8::Local<v8::String> str = fxv8::NewStringHelper(pIsolate, utf8Name);
208 v8::Maybe<bool> result = context->Global()->Set(context, str, pValue);
209 return result.IsJust() && result.FromJust();
210 }
211
MaybeCoerceToNumber(v8::Local<v8::Value> value)212 v8::Local<v8::Value> CJS_Runtime::MaybeCoerceToNumber(
213 v8::Local<v8::Value> value) {
214 bool bAllowNaN = false;
215 if (value->IsString()) {
216 ByteString bstr = fxv8::ToByteString(GetIsolate(), value.As<v8::String>());
217 if (bstr.IsEmpty())
218 return value;
219 if (bstr == "NaN")
220 bAllowNaN = true;
221 }
222
223 v8::TryCatch try_catch(GetIsolate());
224 v8::MaybeLocal<v8::Number> maybeNum =
225 value->ToNumber(GetIsolate()->GetCurrentContext());
226 if (maybeNum.IsEmpty())
227 return value;
228
229 v8::Local<v8::Number> num = maybeNum.ToLocalChecked();
230 if (isnan(num->Value()) && !bAllowNaN)
231 return value;
232
233 return num;
234 }
235