forked from mozilla/gecko-dev
-
Notifications
You must be signed in to change notification settings - Fork 2
/
nsJSEnvironment.h
376 lines (314 loc) · 13.8 KB
/
nsJSEnvironment.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsJSEnvironment_h___
#define nsJSEnvironment_h___
#include "nsIScriptContext.h"
#include "nsIScriptRuntime.h"
#include "nsCOMPtr.h"
#include "jsapi.h"
#include "nsIObserver.h"
#include "nsIXPCScriptNotify.h"
#include "prtime.h"
#include "nsCycleCollectionParticipant.h"
#include "nsScriptNameSpaceManager.h"
class nsIXPConnectJSObjectHolder;
class nsAutoPoolRelease;
namespace js {
class AutoArrayRooter;
}
namespace mozilla {
template <class> class Maybe;
}
class nsJSContext : public nsIScriptContext,
public nsIXPCScriptNotify
{
public:
nsJSContext(JSRuntime *aRuntime);
virtual ~nsJSContext();
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(nsJSContext,
nsIScriptContext)
virtual nsIScriptObjectPrincipal* GetObjectPrincipal();
virtual PRUint32 GetScriptTypeID()
{ return nsIProgrammingLanguage::JAVASCRIPT; }
virtual nsresult EvaluateString(const nsAString& aScript,
void *aScopeObject,
nsIPrincipal *principal,
const char *aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
nsAString *aRetValue,
PRBool* aIsUndefined);
virtual nsresult EvaluateStringWithValue(const nsAString& aScript,
void *aScopeObject,
nsIPrincipal *aPrincipal,
const char *aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
void* aRetValue,
PRBool* aIsUndefined);
virtual nsresult CompileScript(const PRUnichar* aText,
PRInt32 aTextLength,
void *aScopeObject,
nsIPrincipal *principal,
const char *aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
nsScriptObjectHolder &aScriptObject);
virtual nsresult ExecuteScript(void* aScriptObject,
void *aScopeObject,
nsAString* aRetValue,
PRBool* aIsUndefined);
virtual nsresult CompileEventHandler(nsIAtom *aName,
PRUint32 aArgCount,
const char** aArgNames,
const nsAString& aBody,
const char *aURL, PRUint32 aLineNo,
PRUint32 aVersion,
nsScriptObjectHolder &aHandler);
virtual nsresult CallEventHandler(nsISupports* aTarget, void *aScope,
void* aHandler,
nsIArray *argv, nsIVariant **rv);
virtual nsresult BindCompiledEventHandler(nsISupports *aTarget,
void *aScope,
nsIAtom *aName,
void *aHandler);
virtual nsresult GetBoundEventHandler(nsISupports* aTarget, void *aScope,
nsIAtom* aName,
nsScriptObjectHolder &aHandler);
virtual nsresult CompileFunction(void* aTarget,
const nsACString& aName,
PRUint32 aArgCount,
const char** aArgArray,
const nsAString& aBody,
const char* aURL,
PRUint32 aLineNo,
PRUint32 aVersion,
PRBool aShared,
void** aFunctionObject);
virtual void SetDefaultLanguageVersion(PRUint32 aVersion);
virtual nsIScriptGlobalObject *GetGlobalObject();
virtual void *GetNativeContext();
virtual void *GetNativeGlobal();
virtual nsresult CreateNativeGlobalForInner(
nsIScriptGlobalObject *aGlobal,
PRBool aIsChrome,
nsIPrincipal *aPrincipal,
void **aNativeGlobal,
nsISupports **aHolder);
virtual nsresult ConnectToInner(nsIScriptGlobalObject *aNewInner,
void *aOuterGlobal);
virtual nsresult InitContext();
virtual nsresult CreateOuterObject(nsIScriptGlobalObject *aGlobalObject,
nsIScriptGlobalObject *aCurrentInner);
virtual nsresult SetOuterObject(void *aOuterObject);
virtual nsresult InitOuterWindow();
virtual PRBool IsContextInitialized();
virtual void FinalizeContext();
virtual void ScriptEvaluated(PRBool aTerminated);
virtual nsresult SetTerminationFunction(nsScriptTerminationFunc aFunc,
nsISupports* aRef);
virtual PRBool GetScriptsEnabled();
virtual void SetScriptsEnabled(PRBool aEnabled, PRBool aFireTimeouts);
virtual nsresult SetProperty(void *aTarget, const char *aPropName, nsISupports *aVal);
virtual PRBool GetProcessingScriptTag();
virtual void SetProcessingScriptTag(PRBool aResult);
virtual PRBool GetExecutingScript();
virtual void SetGCOnDestruction(PRBool aGCOnDestruction);
virtual nsresult InitClasses(void *aGlobalObj);
virtual void ClearScope(void* aGlobalObj, PRBool bClearPolluters);
virtual void WillInitializeContext();
virtual void DidInitializeContext();
virtual void DidSetDocument(nsISupports *aDocdoc, void *aGlobal) {;}
virtual nsresult Serialize(nsIObjectOutputStream* aStream, void *aScriptObject);
virtual nsresult Deserialize(nsIObjectInputStream* aStream,
nsScriptObjectHolder &aResult);
virtual nsresult DropScriptObject(void *object);
virtual nsresult HoldScriptObject(void *object);
virtual void EnterModalState();
virtual void LeaveModalState();
NS_DECL_NSIXPCSCRIPTNOTIFY
static void LoadStart();
static void LoadEnd();
static void GarbageCollectNow();
static void CycleCollectNow(nsICycleCollectorListener *aListener = nsnull);
static void PokeGC();
static void KillGCTimer();
static void PokeCC();
static void MaybePokeCC();
static void KillCCTimer();
virtual void GC();
protected:
nsresult InitializeExternalClasses();
// Helper to convert xpcom datatypes to jsvals.
nsresult ConvertSupportsTojsvals(nsISupports *aArgs,
void *aScope,
PRUint32 *aArgc,
jsval **aArgv,
mozilla::Maybe<nsAutoPoolRelease> &aPoolRelease,
mozilla::Maybe<js::AutoArrayRooter> &aRooter);
nsresult AddSupportsPrimitiveTojsvals(nsISupports *aArg, jsval *aArgv);
// given an nsISupports object (presumably an event target or some other
// DOM object), get (or create) the JSObject wrapping it.
nsresult JSObjectFromInterface(nsISupports *aSup, void *aScript,
JSObject **aRet);
// Report the pending exception on our mContext, if any. This
// function will set aside the frame chain on mContext before
// reporting.
void ReportPendingException();
private:
void DestroyJSContext();
nsrefcnt GetCCRefcnt();
JSContext *mContext;
PRUint32 mNumEvaluations;
protected:
struct TerminationFuncHolder;
friend struct TerminationFuncHolder;
struct TerminationFuncClosure
{
TerminationFuncClosure(nsScriptTerminationFunc aFunc,
nsISupports* aArg,
TerminationFuncClosure* aNext) :
mTerminationFunc(aFunc),
mTerminationFuncArg(aArg),
mNext(aNext)
{
}
~TerminationFuncClosure()
{
delete mNext;
}
nsScriptTerminationFunc mTerminationFunc;
nsCOMPtr<nsISupports> mTerminationFuncArg;
TerminationFuncClosure* mNext;
};
struct TerminationFuncHolder
{
TerminationFuncHolder(nsJSContext* aContext)
: mContext(aContext),
mTerminations(aContext->mTerminations)
{
aContext->mTerminations = nsnull;
}
~TerminationFuncHolder()
{
// Have to be careful here. mContext might have picked up new
// termination funcs while the script was evaluating. Prepend whatever
// we have to the current termination funcs on the context (since our
// termination funcs were posted first).
if (mTerminations) {
TerminationFuncClosure* cur = mTerminations;
while (cur->mNext) {
cur = cur->mNext;
}
cur->mNext = mContext->mTerminations;
mContext->mTerminations = mTerminations;
}
}
nsJSContext* mContext;
TerminationFuncClosure* mTerminations;
};
TerminationFuncClosure* mTerminations;
private:
PRPackedBool mIsInitialized;
PRPackedBool mScriptsEnabled;
PRPackedBool mGCOnDestruction;
PRPackedBool mProcessingScriptTag;
PRUint32 mExecuteDepth;
PRUint32 mDefaultJSOptions;
PRTime mOperationCallbackTime;
PRTime mModalStateTime;
PRUint32 mModalStateDepth;
// mGlobalObjectRef ensures that the outer window stays alive as long as the
// context does. It is eventually collected by the cycle collector.
nsCOMPtr<nsIScriptGlobalObject> mGlobalObjectRef;
static int JSOptionChangedCallback(const char *pref, void *data);
static JSBool DOMOperationCallback(JSContext *cx);
};
class nsIJSRuntimeService;
class nsJSRuntime : public nsIScriptRuntime
{
public:
// let people who can see us use our runtime for convenience.
static JSRuntime *sRuntime;
public:
// nsISupports
NS_DECL_ISUPPORTS
virtual PRUint32 GetScriptTypeID() {
return nsIProgrammingLanguage::JAVASCRIPT;
}
virtual nsresult CreateContext(nsIScriptContext **ret);
virtual nsresult ParseVersion(const nsString &aVersionStr, PRUint32 *flags);
virtual nsresult DropScriptObject(void *object);
virtual nsresult HoldScriptObject(void *object);
static void Startup();
static void Shutdown();
// Setup all the statics etc - safe to call multiple times after Startup()
static nsresult Init();
// Get the NameSpaceManager, creating if necessary
static nsScriptNameSpaceManager* GetNameSpaceManager();
};
// An interface for fast and native conversion to/from nsIArray. If an object
// supports this interface, JS can reach directly in for the argv, and avoid
// nsISupports conversion. If this interface is not supported, the object will
// be queried for nsIArray, and everything converted via xpcom objects.
#define NS_IJSARGARRAY_IID \
{ /*{E96FB2AE-CB4F-44a0-81F8-D91C80AFE9A3} */ \
0xe96fb2ae, 0xcb4f, 0x44a0, \
{ 0x81, 0xf8, 0xd9, 0x1c, 0x80, 0xaf, 0xe9, 0xa3 } }
class nsIJSArgArray: public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IJSARGARRAY_IID)
// Bug 312003 describes why this must be "void **", but after calling argv
// may be cast to jsval* and the args found at:
// ((jsval*)argv)[0], ..., ((jsval*)argv)[argc - 1]
virtual nsresult GetArgs(PRUint32 *argc, void **argv) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIJSArgArray, NS_IJSARGARRAY_IID)
/* factory functions */
nsresult NS_CreateJSRuntime(nsIScriptRuntime **aRuntime);
/* prototypes */
void NS_ScriptErrorReporter(JSContext *cx, const char *message, JSErrorReport *report);
JSObject* NS_DOMReadStructuredClone(JSContext* cx,
JSStructuredCloneReader* reader, uint32 tag,
uint32 data, void* closure);
JSBool NS_DOMWriteStructuredClone(JSContext* cx,
JSStructuredCloneWriter* writer,
JSObject* obj, void *closure);
void NS_DOMStructuredCloneError(JSContext* cx, uint32 errorid);
#endif /* nsJSEnvironment_h___ */