Cleanup: Do not check pointers before deleting them, part 2.
[pdfium.git] / fpdfsdk / src / javascript / JS_Runtime.cpp
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 "../../include/javascript/JavaScript.h"
8 #include "../../include/javascript/IJavaScript.h"
9 #include "../../include/javascript/JS_EventHandler.h"
10 #include "../../include/javascript/JS_Runtime.h"
11 #include "../../include/javascript/JS_Context.h"
12 #include "../../include/javascript/JS_Define.h"
13 #include "../../include/javascript/JS_Object.h"
14 #include "../../include/javascript/JS_Value.h"
15 #include "../../include/javascript/Document.h"
16 #include "../../include/javascript/app.h"
17 #include "../../include/javascript/color.h"
18 #include "../../include/javascript/Consts.h"
19 #include "../../include/javascript/Document.h"
20 #include "../../include/javascript/event.h"
21 #include "../../include/javascript/Field.h"
22 #include "../../include/javascript/Icon.h"
23 #include "../../include/javascript/PublicMethods.h"
24 #include "../../include/javascript/report.h"
25 #include "../../include/javascript/util.h"
26 #include "../../include/javascript/JS_GlobalData.h"
27 #include "../../include/javascript/global.h"
28 #include "../../include/javascript/console.h"
29
30 CJS_RuntimeFactory::~CJS_RuntimeFactory()
31 {
32 }
33
34 IFXJS_Runtime*                                  CJS_RuntimeFactory::NewJSRuntime(CPDFDoc_Environment* pApp)
35 {
36         if (!m_bInit)
37         {
38                 unsigned int embedderDataSlot = 0;
39                 if (pApp->GetFormFillInfo()->m_pJsPlatform->version >= 2) {
40                         embedderDataSlot = pApp->GetFormFillInfo()->m_pJsPlatform->m_v8EmbedderSlot;
41                 }
42                 JS_Initial(embedderDataSlot);
43                 m_bInit = TRUE;
44         }
45         return new CJS_Runtime(pApp);
46 }
47 void                                                    CJS_RuntimeFactory::AddRef()
48 {
49         //to do.Should be implemented as atom manipulation.
50         m_nRef++;
51 }
52 void                                                    CJS_RuntimeFactory::Release()
53 {
54         if(m_bInit)
55         {
56                 //to do.Should be implemented as atom manipulation.
57                 if (--m_nRef == 0)
58                 {
59                         JS_Release();
60                         ReleaseGlobalData();
61                         m_bInit = FALSE;
62                 }
63         }
64 }
65
66 void                                                    CJS_RuntimeFactory::DeleteJSRuntime(IFXJS_Runtime* pRuntime)
67 {
68     delete (CJS_Runtime*)pRuntime;
69 }
70
71 CJS_GlobalData* CJS_RuntimeFactory::NewGlobalData(CPDFDoc_Environment* pApp)
72 {
73         if (m_pGlobalData)
74         {
75                 m_nGlobalDataCount++;
76                 return m_pGlobalData;
77         }
78         else
79         {
80                 m_nGlobalDataCount = 1;
81                 m_pGlobalData = new CJS_GlobalData(pApp);
82                 return m_pGlobalData;
83         }
84 }
85
86 void CJS_RuntimeFactory::ReleaseGlobalData()
87 {
88         m_nGlobalDataCount--;
89
90         if (m_nGlobalDataCount <= 0)
91         {
92                 delete m_pGlobalData;
93                 m_pGlobalData = NULL;
94         }
95 }
96
97 void* CJS_ArrayBufferAllocator::Allocate(size_t length) {
98     return calloc(1, length);
99 }
100
101 void* CJS_ArrayBufferAllocator::AllocateUninitialized(size_t length) {
102     return malloc(length);
103 }
104
105 void CJS_ArrayBufferAllocator::Free(void* data, size_t length) {
106     free(data);
107 }
108
109 /* ------------------------------ CJS_Runtime ------------------------------ */
110
111 CJS_Runtime::CJS_Runtime(CPDFDoc_Environment * pApp) :
112         m_pApp(pApp),
113         m_pDocument(NULL),
114         m_bBlocking(FALSE),
115         m_bRegistered(FALSE),
116         m_pFieldEventPath(NULL),
117         m_isolate(NULL)
118 {
119         if (m_pApp->GetFormFillInfo()->m_pJsPlatform->version >= 2) {
120                 m_isolate = reinterpret_cast<v8::Isolate*>(m_pApp->GetFormFillInfo()->m_pJsPlatform->m_isolate);
121         }
122         if (!m_isolate) {
123                 m_pArrayBufferAllocator.reset(new CJS_ArrayBufferAllocator());
124
125                 v8::Isolate::CreateParams params;
126                 params.array_buffer_allocator = m_pArrayBufferAllocator.get();
127                 m_isolate = v8::Isolate::New(params);
128         }
129
130         InitJSObjects();
131
132         CJS_Context * pContext = (CJS_Context*)NewContext();
133         JS_InitialRuntime(*this, this, pContext, m_context);
134         ReleaseContext(pContext);
135 }
136
137 CJS_Runtime::~CJS_Runtime()
138 {
139         for (int i=0, sz=m_ContextArray.GetSize(); i<sz; i++)
140                 delete m_ContextArray.GetAt(i);
141
142         m_ContextArray.RemoveAll();
143
144         JS_ReleaseRuntime(*this, m_context);
145
146         RemoveEventsInLoop(m_pFieldEventPath);
147
148         m_pApp = NULL;
149         m_pDocument = NULL;
150         m_pFieldEventPath = NULL;
151         m_context.Reset();
152
153         //m_isolate->Exit();
154         m_isolate->Dispose();
155 }
156
157 FX_BOOL CJS_Runtime::InitJSObjects()
158 {
159         v8::Isolate::Scope isolate_scope(GetIsolate());
160         v8::HandleScope handle_scope(GetIsolate());
161         v8::Local<v8::Context> context = v8::Context::New(GetIsolate());
162         v8::Context::Scope context_scope(context);
163         //0 - 8
164         if (CJS_Border::Init(*this, JS_STATIC) < 0) return FALSE;
165         if (CJS_Display::Init(*this, JS_STATIC) < 0) return FALSE;
166         if (CJS_Font::Init(*this, JS_STATIC) < 0) return FALSE;
167         if (CJS_Highlight::Init(*this, JS_STATIC) < 0) return FALSE;
168         if (CJS_Position::Init(*this, JS_STATIC) < 0) return FALSE;
169         if (CJS_ScaleHow::Init(*this, JS_STATIC) < 0) return FALSE;
170         if (CJS_ScaleWhen::Init(*this, JS_STATIC) < 0) return FALSE;
171         if (CJS_Style::Init(*this, JS_STATIC) < 0) return FALSE;
172         if (CJS_Zoomtype::Init(*this, JS_STATIC) < 0) return FALSE;
173
174         //9 - 11
175         if (CJS_App::Init(*this, JS_STATIC) < 0) return FALSE;
176         if (CJS_Color::Init(*this, JS_STATIC) < 0) return FALSE;
177         if (CJS_Console::Init(*this, JS_STATIC) < 0) return FALSE;
178
179         //12 - 14
180         if (CJS_Document::Init(*this, JS_DYNAMIC) < 0) return FALSE;
181         if (CJS_Event::Init(*this, JS_STATIC) < 0) return FALSE;
182         if (CJS_Field::Init(*this, JS_DYNAMIC) < 0) return FALSE;
183
184         //15 - 17
185         if (CJS_Global::Init(*this, JS_STATIC) < 0) return FALSE;
186         if (CJS_Icon::Init(*this, JS_DYNAMIC) < 0) return FALSE;
187         if (CJS_Util::Init(*this, JS_STATIC) < 0) return FALSE;
188
189         if (CJS_PublicMethods::Init(*this) < 0) return FALSE;
190         if (CJS_GlobalConsts::Init(*this) < 0) return FALSE;
191         if (CJS_GlobalArrays::Init(*this) < 0) return FALSE;
192
193         if (CJS_TimerObj::Init(*this, JS_DYNAMIC) < 0) return FALSE;
194         if (CJS_PrintParamsObj::Init(*this, JS_DYNAMIC) <0) return FALSE;
195
196         return TRUE;
197 }
198
199 IFXJS_Context* CJS_Runtime::NewContext()
200 {
201         CJS_Context * p = new CJS_Context(this);
202         m_ContextArray.Add(p);
203         return p;
204 }
205
206 void CJS_Runtime::ReleaseContext(IFXJS_Context * pContext)
207 {
208         CJS_Context* pJSContext = (CJS_Context*)pContext;
209
210         for (int i=0, sz=m_ContextArray.GetSize(); i<sz; i++)
211         {
212                 if (pJSContext == m_ContextArray.GetAt(i))
213                 {
214                         delete pJSContext;
215                         m_ContextArray.RemoveAt(i);
216                         break;
217                 }
218         }
219 }
220
221 IFXJS_Context*  CJS_Runtime::GetCurrentContext()
222 {
223         if(!m_ContextArray.GetSize())
224                 return NULL;
225         return m_ContextArray.GetAt(m_ContextArray.GetSize()-1);
226 }
227
228 void CJS_Runtime::SetReaderDocument(CPDFSDK_Document* pReaderDoc)
229 {
230         if (m_pDocument != pReaderDoc)
231         {
232                 v8::Isolate::Scope isolate_scope(m_isolate);
233                 v8::HandleScope handle_scope(m_isolate);
234                 v8::Local<v8::Context> context =v8::Local<v8::Context>::New(m_isolate, m_context);
235                 v8::Context::Scope context_scope(context);
236
237                 m_pDocument = pReaderDoc;
238
239                 if (pReaderDoc)
240                 {
241                         JSObject pThis = JS_GetThisObj(*this);
242                         if(!pThis.IsEmpty())
243                         {
244                                 if (JS_GetObjDefnID(pThis) == JS_GetObjDefnID(*this, L"Document"))
245                                 {
246                                         if (CJS_Document* pJSDocument = (CJS_Document*)JS_GetPrivate(pThis))
247                                         {
248                                                 if (Document * pDocument = (Document*)pJSDocument->GetEmbedObject())
249                                                         pDocument->AttachDoc(pReaderDoc);
250                                         }
251                                 }
252                         }
253                         JS_SetThisObj(*this, JS_GetObjDefnID(*this, L"Document"));
254                 }
255                 else
256                 {
257                         JS_SetThisObj(*this, JS_GetObjDefnID(*this, L"app"));
258                 }
259         }
260 }
261
262 FX_BOOL CJS_Runtime::AddEventToLoop(const CFX_WideString& sTargetName, JS_EVENT_T eEventType)
263 {
264         if (m_pFieldEventPath == NULL)
265         {
266                 m_pFieldEventPath = new CJS_FieldEvent;
267                 m_pFieldEventPath->sTargetName = sTargetName;
268                 m_pFieldEventPath->eEventType = eEventType;
269                 m_pFieldEventPath->pNext = NULL;
270
271                 return TRUE;
272         }
273
274         //to search
275         CJS_FieldEvent* p = m_pFieldEventPath;
276         CJS_FieldEvent* pLast = m_pFieldEventPath;
277         while (p)
278         {
279                 if (p->eEventType == eEventType && p->sTargetName == sTargetName)
280                         return FALSE;
281
282                 pLast = p;
283                 p = p->pNext;
284         }
285
286         //to add
287         CJS_FieldEvent* pNew = new CJS_FieldEvent;
288         pNew->sTargetName = sTargetName;
289         pNew->eEventType = eEventType;
290         pNew->pNext = NULL;
291
292         pLast->pNext = pNew;
293
294         return TRUE;
295 }
296
297 void CJS_Runtime::RemoveEventInLoop(const CFX_WideString& sTargetName, JS_EVENT_T eEventType)
298 {
299         FX_BOOL bFind = FALSE;
300
301         CJS_FieldEvent* p = m_pFieldEventPath;
302         CJS_FieldEvent* pLast = NULL;
303         while (p)
304         {
305                 if (p->eEventType == eEventType && p->sTargetName == sTargetName)
306                 {
307                         bFind = TRUE;
308                         break;
309                 }
310
311                 pLast = p;
312                 p = p->pNext;
313         }
314
315         if (bFind)
316         {
317                 RemoveEventsInLoop(p);
318
319                 if (p == m_pFieldEventPath)
320                         m_pFieldEventPath = NULL;
321
322                 if (pLast)
323                         pLast->pNext = NULL;
324         }
325 }
326
327 void CJS_Runtime::RemoveEventsInLoop(CJS_FieldEvent* pStart)
328 {
329         CJS_FieldEvent* p = pStart;
330
331         while (p)
332         {
333                 CJS_FieldEvent* pOld = p;
334                 p = pOld->pNext;
335
336                 delete pOld;
337         }
338 }
339
340 v8::Local<v8::Context>  CJS_Runtime::NewJSContext()
341 {
342         return v8::Local<v8::Context>::New(m_isolate, m_context);
343 }
344
345 CFX_WideString ChangeObjName(const CFX_WideString& str)
346 {
347         CFX_WideString sRet = str;
348         sRet.Replace(L"_", L".");
349         return sRet;
350 }