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
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
|
/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2007 Samuel Weinig <sam@webkit.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "JSDOMBinding.h"
#include "ActiveDOMObject.h"
#include "DOMCoreException.h"
#include "Document.h"
#include "EventException.h"
#include "ExceptionCode.h"
#include "Frame.h"
#include "HTMLAudioElement.h"
#include "HTMLCanvasElement.h"
#include "HTMLImageElement.h"
#include "HTMLScriptElement.h"
#include "HTMLNames.h"
#include "JSDOMCoreException.h"
#include "JSDOMWindowCustom.h"
#include "JSEventException.h"
#include "JSNode.h"
#include "JSRangeException.h"
#include "JSXMLHttpRequestException.h"
#include "KURL.h"
#include "MessagePort.h"
#include "RangeException.h"
#include "ScriptController.h"
#include "XMLHttpRequestException.h"
#include <runtime/JSFunction.h>
#include <runtime/PrototypeFunction.h>
#include <wtf/StdLibExtras.h>
#if ENABLE(SVG)
#include "JSSVGException.h"
#include "SVGException.h"
#endif
#if ENABLE(XPATH)
#include "JSXPathException.h"
#include "XPathException.h"
#endif
#if ENABLE(WORKERS)
#include <wtf/ThreadSpecific.h>
using namespace WTF;
#endif
using namespace JSC;
namespace WebCore {
using namespace HTMLNames;
typedef Document::JSWrapperCache JSWrapperCache;
// For debugging, keep a set of wrappers currently registered, and check that
// all are unregistered before they are destroyed. This has helped us fix at
// least one bug.
static void addWrapper(DOMObject* wrapper);
static void removeWrapper(DOMObject* wrapper);
static void removeWrappers(const JSWrapperCache& wrappers);
#ifdef NDEBUG
static inline void addWrapper(DOMObject*)
{
}
static inline void removeWrapper(DOMObject*)
{
}
static inline void removeWrappers(const JSWrapperCache&)
{
}
#else
static HashSet<DOMObject*>& wrapperSet()
{
#if ENABLE(WORKERS)
DEFINE_STATIC_LOCAL(ThreadSpecific<HashSet<DOMObject*> >, staticWrapperSet, ());
return *staticWrapperSet;
#else
DEFINE_STATIC_LOCAL(HashSet<DOMObject*>, staticWrapperSet, ());
return staticWrapperSet;
#endif
}
static void addWrapper(DOMObject* wrapper)
{
ASSERT(!wrapperSet().contains(wrapper));
wrapperSet().add(wrapper);
}
static void removeWrapper(DOMObject* wrapper)
{
if (!wrapper)
return;
ASSERT(wrapperSet().contains(wrapper));
wrapperSet().remove(wrapper);
}
static void removeWrappers(const JSWrapperCache& wrappers)
{
for (JSWrapperCache::const_iterator it = wrappers.begin(); it != wrappers.end(); ++it)
removeWrapper(it->second);
}
DOMObject::~DOMObject()
{
ASSERT(!wrapperSet().contains(this));
}
#endif
class DOMObjectWrapperMap {
public:
static DOMObjectWrapperMap& mapFor(JSGlobalData&);
DOMObject* get(void* objectHandle)
{
return m_map.get(objectHandle);
}
void set(void* objectHandle, DOMObject* wrapper)
{
addWrapper(wrapper);
m_map.set(objectHandle, wrapper);
}
void remove(void* objectHandle)
{
removeWrapper(m_map.take(objectHandle));
}
private:
HashMap<void*, DOMObject*> m_map;
};
// Map from static HashTable instances to per-GlobalData ones.
class DOMObjectHashTableMap {
public:
static DOMObjectHashTableMap& mapFor(JSGlobalData&);
~DOMObjectHashTableMap()
{
HashMap<const JSC::HashTable*, JSC::HashTable>::iterator mapEnd = m_map.end();
for (HashMap<const JSC::HashTable*, JSC::HashTable>::iterator iter = m_map.begin(); iter != m_map.end(); ++iter)
iter->second.deleteTable();
}
const JSC::HashTable* get(const JSC::HashTable* staticTable)
{
HashMap<const JSC::HashTable*, JSC::HashTable>::iterator iter = m_map.find(staticTable);
if (iter != m_map.end())
return &iter->second;
return &m_map.set(staticTable, JSC::HashTable(*staticTable)).first->second;
}
private:
HashMap<const JSC::HashTable*, JSC::HashTable> m_map;
};
class WebCoreJSClientData : public JSGlobalData::ClientData {
public:
DOMObjectHashTableMap hashTableMap;
DOMObjectWrapperMap wrapperMap;
};
DOMObjectHashTableMap& DOMObjectHashTableMap::mapFor(JSGlobalData& globalData)
{
JSGlobalData::ClientData* clientData = globalData.clientData;
if (!clientData) {
clientData = new WebCoreJSClientData;
globalData.clientData = clientData;
}
return static_cast<WebCoreJSClientData*>(clientData)->hashTableMap;
}
const JSC::HashTable* getHashTableForGlobalData(JSGlobalData& globalData, const JSC::HashTable* staticTable)
{
return DOMObjectHashTableMap::mapFor(globalData).get(staticTable);
}
inline DOMObjectWrapperMap& DOMObjectWrapperMap::mapFor(JSGlobalData& globalData)
{
JSGlobalData::ClientData* clientData = globalData.clientData;
if (!clientData) {
clientData = new WebCoreJSClientData;
globalData.clientData = clientData;
}
return static_cast<WebCoreJSClientData*>(clientData)->wrapperMap;
}
DOMObject* getCachedDOMObjectWrapper(JSGlobalData& globalData, void* objectHandle)
{
return DOMObjectWrapperMap::mapFor(globalData).get(objectHandle);
}
void cacheDOMObjectWrapper(JSGlobalData& globalData, void* objectHandle, DOMObject* wrapper)
{
DOMObjectWrapperMap::mapFor(globalData).set(objectHandle, wrapper);
}
void forgetDOMObject(JSGlobalData& globalData, void* objectHandle)
{
DOMObjectWrapperMap::mapFor(globalData).remove(objectHandle);
}
JSNode* getCachedDOMNodeWrapper(Document* document, Node* node)
{
if (!document)
return static_cast<JSNode*>(DOMObjectWrapperMap::mapFor(*JSDOMWindow::commonJSGlobalData()).get(node));
return document->wrapperCache().get(node);
}
void forgetDOMNode(Document* document, Node* node)
{
if (!document) {
DOMObjectWrapperMap::mapFor(*JSDOMWindow::commonJSGlobalData()).remove(node);
return;
}
removeWrapper(document->wrapperCache().take(node));
}
void cacheDOMNodeWrapper(Document* document, Node* node, JSNode* wrapper)
{
if (!document) {
DOMObjectWrapperMap::mapFor(*JSDOMWindow::commonJSGlobalData()).set(node, wrapper);
return;
}
addWrapper(wrapper);
document->wrapperCache().set(node, wrapper);
}
void forgetAllDOMNodesForDocument(Document* document)
{
ASSERT(document);
removeWrappers(document->wrapperCache());
}
static inline bool isObservableThroughDOM(JSNode* jsNode)
{
// Certain conditions implicitly make a JS DOM node wrapper observable
// through the DOM, even if no explicit reference to it remains.
Node* node = jsNode->impl();
if (node->inDocument()) {
// If a node is in the document, and its wrapper has custom properties,
// the wrapper is observable because future access to the node through the
// DOM must reflect those properties.
if (jsNode->hasCustomProperties())
return true;
// If a node is in the document, and has event listeners, its wrapper is
// observable because its wrapper is responsible for marking those event listeners.
if (node->eventListeners().size())
return true; // Technically, we may overzealously mark a wrapper for a node that has only non-JS event listeners. Oh well.
// If a node owns another object with a wrapper with custom properties,
// the wrapper must be treated as observable, because future access to
// those objects through the DOM must reflect those properties.
// FIXME: It would be better if this logic could be in the node next to
// the custom markChildren functions rather than here.
if (node->isElementNode()) {
if (NamedNodeMap* attributes = static_cast<Element*>(node)->attributeMap()) {
if (DOMObject* wrapper = getCachedDOMObjectWrapper(*jsNode->globalObject()->globalData(), attributes)) {
if (wrapper->hasCustomProperties())
return true;
}
}
if (node->isStyledElement()) {
if (CSSMutableStyleDeclaration* style = static_cast<StyledElement*>(node)->inlineStyleDecl()) {
if (DOMObject* wrapper = getCachedDOMObjectWrapper(*jsNode->globalObject()->globalData(), style)) {
if (wrapper->hasCustomProperties())
return true;
}
}
}
if (static_cast<Element*>(node)->hasTagName(canvasTag)) {
if (CanvasRenderingContext2D* context = static_cast<HTMLCanvasElement*>(node)->renderingContext2D()) {
if (DOMObject* wrapper = getCachedDOMObjectWrapper(*jsNode->globalObject()->globalData(), context)) {
if (wrapper->hasCustomProperties())
return true;
}
}
}
}
} else {
// If a wrapper is the last reference to an image or script element
// that is loading but not in the document, the wrapper is observable
// because it is the only thing keeping the image element alive, and if
// the image element is destroyed, its load event will not fire.
// FIXME: The DOM should manage this issue without the help of JavaScript wrappers.
if (node->hasTagName(imgTag) && !static_cast<HTMLImageElement*>(node)->haveFiredLoadEvent())
return true;
if (node->hasTagName(scriptTag) && !static_cast<HTMLScriptElement*>(node)->haveFiredLoadEvent())
return true;
#if ENABLE(VIDEO)
if (node->hasTagName(audioTag) && !static_cast<HTMLAudioElement*>(node)->paused())
return true;
#endif
}
return false;
}
void markDOMNodesForDocument(MarkStack& markStack, Document* doc)
{
JSWrapperCache& nodeDict = doc->wrapperCache();
JSWrapperCache::iterator nodeEnd = nodeDict.end();
for (JSWrapperCache::iterator nodeIt = nodeDict.begin(); nodeIt != nodeEnd; ++nodeIt) {
JSNode* jsNode = nodeIt->second;
if (isObservableThroughDOM(jsNode))
markStack.append(jsNode);
}
}
void markActiveObjectsForContext(MarkStack& markStack, JSGlobalData& globalData, ScriptExecutionContext* scriptExecutionContext)
{
// If an element has pending activity that may result in event listeners being called
// (e.g. an XMLHttpRequest), we need to keep JS wrappers alive.
const HashMap<ActiveDOMObject*, void*>& activeObjects = scriptExecutionContext->activeDOMObjects();
HashMap<ActiveDOMObject*, void*>::const_iterator activeObjectsEnd = activeObjects.end();
for (HashMap<ActiveDOMObject*, void*>::const_iterator iter = activeObjects.begin(); iter != activeObjectsEnd; ++iter) {
if (iter->first->hasPendingActivity()) {
DOMObject* wrapper = getCachedDOMObjectWrapper(globalData, iter->second);
// Generally, an active object with pending activity must have a wrapper to mark its listeners.
// However, some ActiveDOMObjects don't have JS wrappers (timers created by setTimeout is one example).
// FIXME: perhaps need to make sure even timers have a markable 'wrapper'.
if (wrapper)
markStack.append(wrapper);
}
}
const HashSet<MessagePort*>& messagePorts = scriptExecutionContext->messagePorts();
HashSet<MessagePort*>::const_iterator portsEnd = messagePorts.end();
for (HashSet<MessagePort*>::const_iterator iter = messagePorts.begin(); iter != portsEnd; ++iter) {
// If the message port is remotely entangled, then always mark it as in-use because we can't determine reachability across threads.
if (!(*iter)->locallyEntangledPort() || (*iter)->hasPendingActivity()) {
DOMObject* wrapper = getCachedDOMObjectWrapper(globalData, *iter);
if (wrapper)
markStack.append(wrapper);
}
}
}
void updateDOMNodeDocument(Node* node, Document* oldDocument, Document* newDocument)
{
ASSERT(oldDocument != newDocument);
JSNode* wrapper = getCachedDOMNodeWrapper(oldDocument, node);
if (!wrapper)
return;
removeWrapper(wrapper);
cacheDOMNodeWrapper(newDocument, node, wrapper);
forgetDOMNode(oldDocument, node);
addWrapper(wrapper);
}
void markDOMObjectWrapper(MarkStack& markStack, JSGlobalData& globalData, void* object)
{
// FIXME: This could be changed to only mark wrappers that are "observable"
// as markDOMNodesForDocument does, allowing us to collect more wrappers,
// but doing this correctly would be challenging.
if (!object)
return;
DOMObject* wrapper = getCachedDOMObjectWrapper(globalData, object);
if (!wrapper)
return;
markStack.append(wrapper);
}
JSValue jsStringOrNull(ExecState* exec, const String& s)
{
if (s.isNull())
return jsNull();
return jsString(exec, s);
}
JSValue jsOwnedStringOrNull(ExecState* exec, const UString& s)
{
if (s.isNull())
return jsNull();
return jsOwnedString(exec, s);
}
JSValue jsStringOrUndefined(ExecState* exec, const String& s)
{
if (s.isNull())
return jsUndefined();
return jsString(exec, s);
}
JSValue jsStringOrFalse(ExecState* exec, const String& s)
{
if (s.isNull())
return jsBoolean(false);
return jsString(exec, s);
}
JSValue jsStringOrNull(ExecState* exec, const KURL& url)
{
if (url.isNull())
return jsNull();
return jsString(exec, url.string());
}
JSValue jsStringOrUndefined(ExecState* exec, const KURL& url)
{
if (url.isNull())
return jsUndefined();
return jsString(exec, url.string());
}
JSValue jsStringOrFalse(ExecState* exec, const KURL& url)
{
if (url.isNull())
return jsBoolean(false);
return jsString(exec, url.string());
}
UString valueToStringWithNullCheck(ExecState* exec, JSValue value)
{
if (value.isNull())
return UString();
return value.toString(exec);
}
UString valueToStringWithUndefinedOrNullCheck(ExecState* exec, JSValue value)
{
if (value.isUndefinedOrNull())
return UString();
return value.toString(exec);
}
void reportException(ExecState* exec, JSValue exception)
{
UString errorMessage = exception.toString(exec);
JSObject* exceptionObject = exception.toObject(exec);
int lineNumber = exceptionObject->get(exec, Identifier(exec, "line")).toInt32(exec);
UString exceptionSourceURL = exceptionObject->get(exec, Identifier(exec, "sourceURL")).toString(exec);
exec->clearException();
ScriptExecutionContext* scriptExecutionContext = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
ASSERT(scriptExecutionContext);
// Crash data indicates null-dereference crashes at this point in the Safari 4 Public Beta.
// It's harmless to return here without reporting the exception to the log and the debugger in this case.
if (!scriptExecutionContext)
return;
scriptExecutionContext->reportException(errorMessage, lineNumber, exceptionSourceURL);
}
void reportCurrentException(ExecState* exec)
{
JSValue exception = exec->exception();
exec->clearException();
reportException(exec, exception);
}
void setDOMException(ExecState* exec, ExceptionCode ec)
{
if (!ec || exec->hadException())
return;
// FIXME: All callers to setDOMException need to pass in the right global object
// for now, we're going to assume the lexicalGlobalObject. Which is wrong in cases like this:
// frames[0].document.createElement(null, null); // throws an exception which should have the subframes prototypes.
JSDOMGlobalObject* globalObject = deprecatedGlobalObjectForPrototype(exec);
ExceptionCodeDescription description;
getExceptionCodeDescription(ec, description);
JSValue errorObject;
switch (description.type) {
case DOMExceptionType:
errorObject = toJS(exec, globalObject, DOMCoreException::create(description));
break;
case RangeExceptionType:
errorObject = toJS(exec, globalObject, RangeException::create(description));
break;
case EventExceptionType:
errorObject = toJS(exec, globalObject, EventException::create(description));
break;
case XMLHttpRequestExceptionType:
errorObject = toJS(exec, globalObject, XMLHttpRequestException::create(description));
break;
#if ENABLE(SVG)
case SVGExceptionType:
errorObject = toJS(exec, globalObject, SVGException::create(description).get(), 0);
break;
#endif
#if ENABLE(XPATH)
case XPathExceptionType:
errorObject = toJS(exec, globalObject, XPathException::create(description));
break;
#endif
}
ASSERT(errorObject);
exec->setException(errorObject);
}
bool checkNodeSecurity(ExecState* exec, Node* node)
{
return node && allowsAccessFromFrame(exec, node->document()->frame());
}
bool allowsAccessFromFrame(ExecState* exec, Frame* frame)
{
if (!frame)
return false;
JSDOMWindow* window = toJSDOMWindow(frame);
return window && window->allowsAccessFrom(exec);
}
bool allowsAccessFromFrame(ExecState* exec, Frame* frame, String& message)
{
if (!frame)
return false;
JSDOMWindow* window = toJSDOMWindow(frame);
return window && window->allowsAccessFrom(exec, message);
}
bool shouldAllowNavigation(ExecState* exec, Frame* frame)
{
Frame* lexicalFrame = toLexicalFrame(exec);
return lexicalFrame && lexicalFrame->loader()->shouldAllowNavigation(frame);
}
void printErrorMessageForFrame(Frame* frame, const String& message)
{
if (!frame)
return;
if (JSDOMWindow* window = toJSDOMWindow(frame))
window->printErrorMessage(message);
}
Frame* toLexicalFrame(ExecState* exec)
{
return asJSDOMWindow(exec->lexicalGlobalObject())->impl()->frame();
}
Frame* toDynamicFrame(ExecState* exec)
{
return asJSDOMWindow(exec->dynamicGlobalObject())->impl()->frame();
}
bool processingUserGesture(ExecState* exec)
{
Frame* frame = toDynamicFrame(exec);
return frame && frame->script()->processingUserGesture();
}
KURL completeURL(ExecState* exec, const String& relativeURL)
{
// For histoical reasons, we need to complete the URL using the dynamic frame.
Frame* frame = toDynamicFrame(exec);
if (!frame)
return KURL();
return frame->loader()->completeURL(relativeURL);
}
JSValue objectToStringFunctionGetter(ExecState* exec, const Identifier& propertyName, const PropertySlot&)
{
return new (exec) NativeFunctionWrapper(exec, exec->lexicalGlobalObject()->prototypeFunctionStructure(), 0, propertyName, objectProtoFuncToString);
}
Structure* getCachedDOMStructure(JSDOMGlobalObject* globalObject, const ClassInfo* classInfo)
{
JSDOMStructureMap& structures = globalObject->structures();
return structures.get(classInfo).get();
}
Structure* cacheDOMStructure(JSDOMGlobalObject* globalObject, PassRefPtr<Structure> structure, const ClassInfo* classInfo)
{
JSDOMStructureMap& structures = globalObject->structures();
ASSERT(!structures.contains(classInfo));
return structures.set(classInfo, structure).first->second.get();
}
Structure* getCachedDOMStructure(ExecState* exec, const ClassInfo* classInfo)
{
return getCachedDOMStructure(static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), classInfo);
}
Structure* cacheDOMStructure(ExecState* exec, PassRefPtr<Structure> structure, const ClassInfo* classInfo)
{
return cacheDOMStructure(static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject()), structure, classInfo);
}
JSObject* getCachedDOMConstructor(ExecState* exec, const ClassInfo* classInfo)
{
JSDOMConstructorMap& constructors = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->constructors();
return constructors.get(classInfo);
}
void cacheDOMConstructor(ExecState* exec, const ClassInfo* classInfo, JSObject* constructor)
{
JSDOMConstructorMap& constructors = static_cast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->constructors();
ASSERT(!constructors.contains(classInfo));
constructors.set(classInfo, constructor);
}
} // namespace WebCore
|