source: webkit/trunk/JavaScriptCore/API/JSCallbackObject.cpp@ 15483

Last change on this file since 15483 was 15483, checked in by ggaren, 19 years ago

Reviewed by Maciej.


  • Changed the initialize callback to run from least derived class (parent class) to most derived class. This enables C++ style initialization, and derived class overriding of member data.


  • Added excpetion propopgation to JSObjectMake, to support initialize exceptions, and generally round out our policy of making function signatures as long as possible.
  • API/JSCallbackObject.h: Use ExecState instead of ContextRef, cuz we're in C++ land now.
File size: 17.0 KB
Line 
1// -*- mode: c++; c-basic-offset: 4 -*-
2/*
3 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "APICast.h"
28#include "JSCallbackFunction.h"
29#include "JSCallbackObject.h"
30#include "JSStringRef.h"
31#include "JSClassRef.h"
32#include "JSObjectRef.h"
33#include "internal.h"
34#include "PropertyNameArray.h"
35
36namespace KJS {
37
38const ClassInfo JSCallbackObject::info = { "CallbackObject", 0, 0, 0 };
39
40JSCallbackObject::JSCallbackObject(ExecState* exec, JSClassRef jsClass)
41 : JSObject()
42{
43 init(exec, jsClass);
44}
45
46JSCallbackObject::JSCallbackObject(ExecState* exec, JSClassRef jsClass, JSValue* prototype)
47 : JSObject(prototype)
48{
49 init(exec, jsClass);
50}
51
52void JSCallbackObject::init(ExecState* exec, JSClassRef jsClass)
53{
54 m_privateData = 0;
55 m_class = JSClassRetain(jsClass);
56
57 Vector<JSObjectInitializeCallback, 16> initRoutines;
58 do {
59 if (JSObjectInitializeCallback initialize = jsClass->initialize)
60 initRoutines.append(initialize);
61 } while ((jsClass = jsClass->parentClass));
62
63 // initialize from base to derived
64 for (int i = initRoutines.size() - 1; i >= 0; i--) {
65 JSObjectInitializeCallback initialize = initRoutines[i];
66 initialize(toRef(exec), toRef(this), toRef(exec->exceptionSlot()));
67 }
68}
69
70JSCallbackObject::~JSCallbackObject()
71{
72 JSObjectRef thisRef = toRef(this);
73
74 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
75 if (JSObjectFinalizeCallback finalize = jsClass->finalize)
76 finalize(thisRef);
77
78 JSClassRelease(m_class);
79}
80
81UString JSCallbackObject::className() const
82{
83 if (!m_class->className.isNull())
84 return m_class->className;
85
86 return JSObject::className();
87}
88
89bool JSCallbackObject::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
90{
91 JSContextRef ctx = toRef(exec);
92 JSObjectRef thisRef = toRef(this);
93 JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
94
95 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
96 // optional optimization to bypass getProperty in cases when we only need to know if the property exists
97 if (JSObjectHasPropertyCallback hasProperty = jsClass->hasProperty) {
98 if (hasProperty(ctx, thisRef, propertyNameRef)) {
99 slot.setCustom(this, callbackGetter);
100 return true;
101 }
102 } else if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty) {
103 if (JSValueRef value = getProperty(ctx, thisRef, propertyNameRef, toRef(exec->exceptionSlot()))) {
104 // cache the value so we don't have to compute it again
105 // FIXME: This violates the PropertySlot design a little bit.
106 // We should either use this optimization everywhere, or nowhere.
107 slot.setCustom(reinterpret_cast<JSObject*>(toJS(value)), cachedValueGetter);
108 return true;
109 }
110 }
111
112 if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
113 if (staticValues->contains(propertyName.ustring().rep())) {
114 slot.setCustom(this, staticValueGetter);
115 return true;
116 }
117 }
118
119 if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
120 if (staticFunctions->contains(propertyName.ustring().rep())) {
121 slot.setCustom(this, staticFunctionGetter);
122 return true;
123 }
124 }
125 }
126
127 return JSObject::getOwnPropertySlot(exec, propertyName, slot);
128}
129
130bool JSCallbackObject::getOwnPropertySlot(ExecState* exec, unsigned propertyName, PropertySlot& slot)
131{
132 return getOwnPropertySlot(exec, Identifier::from(propertyName), slot);
133}
134
135void JSCallbackObject::put(ExecState* exec, const Identifier& propertyName, JSValue* value, int attr)
136{
137 JSContextRef ctx = toRef(exec);
138 JSObjectRef thisRef = toRef(this);
139 JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
140 JSValueRef valueRef = toRef(value);
141
142 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
143 if (JSObjectSetPropertyCallback setProperty = jsClass->setProperty) {
144 if (setProperty(ctx, thisRef, propertyNameRef, valueRef, toRef(exec->exceptionSlot())))
145 return;
146 }
147
148 if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
149 if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep())) {
150 if (entry->attributes & kJSPropertyAttributeReadOnly)
151 return;
152 if (JSObjectSetPropertyCallback setProperty = entry->setProperty)
153 setProperty(ctx, thisRef, propertyNameRef, valueRef, toRef(exec->exceptionSlot()));
154 else
155 throwError(exec, ReferenceError, "Writable static value property defined with NULL setProperty callback.");
156 }
157 }
158
159 if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
160 if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
161 if (entry->attributes & kJSPropertyAttributeReadOnly)
162 return;
163 putDirect(propertyName, value, attr); // put as override property
164 return;
165 }
166 }
167 }
168
169 return JSObject::put(exec, propertyName, value, attr);
170}
171
172void JSCallbackObject::put(ExecState* exec, unsigned propertyName, JSValue* value, int attr)
173{
174 return put(exec, Identifier::from(propertyName), value, attr);
175}
176
177bool JSCallbackObject::deleteProperty(ExecState* exec, const Identifier& propertyName)
178{
179 JSContextRef ctx = toRef(exec);
180 JSObjectRef thisRef = toRef(this);
181 JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
182
183 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
184 if (JSObjectDeletePropertyCallback deleteProperty = jsClass->deleteProperty) {
185 if (deleteProperty(ctx, thisRef, propertyNameRef, toRef(exec->exceptionSlot())))
186 return true;
187 }
188
189 if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
190 if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep())) {
191 if (entry->attributes & kJSPropertyAttributeDontDelete)
192 return false;
193 return true;
194 }
195 }
196
197 if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
198 if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
199 if (entry->attributes & kJSPropertyAttributeDontDelete)
200 return false;
201 return true;
202 }
203 }
204 }
205
206 return JSObject::deleteProperty(exec, propertyName);
207}
208
209bool JSCallbackObject::deleteProperty(ExecState* exec, unsigned propertyName)
210{
211 return deleteProperty(exec, Identifier::from(propertyName));
212}
213
214bool JSCallbackObject::implementsConstruct() const
215{
216 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
217 if (jsClass->callAsConstructor)
218 return true;
219
220 return false;
221}
222
223JSObject* JSCallbackObject::construct(ExecState* exec, const List& args)
224{
225 JSContextRef execRef = toRef(exec);
226 JSObjectRef thisRef = toRef(this);
227
228 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
229 if (JSObjectCallAsConstructorCallback callAsConstructor = jsClass->callAsConstructor) {
230 size_t argumentCount = args.size();
231 JSValueRef arguments[argumentCount];
232 for (size_t i = 0; i < argumentCount; i++)
233 arguments[i] = toRef(args[i]);
234 return toJS(callAsConstructor(execRef, thisRef, argumentCount, arguments, toRef(exec->exceptionSlot())));
235 }
236 }
237
238 ASSERT(0); // implementsConstruct should prevent us from reaching here
239 return 0;
240}
241
242bool JSCallbackObject::implementsHasInstance() const
243{
244 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
245 if (jsClass->hasInstance)
246 return true;
247
248 return false;
249}
250
251bool JSCallbackObject::hasInstance(ExecState *exec, JSValue *value)
252{
253 JSContextRef execRef = toRef(exec);
254 JSObjectRef thisRef = toRef(this);
255
256 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
257 if (JSObjectHasInstanceCallback hasInstance = jsClass->hasInstance)
258 return hasInstance(execRef, thisRef, toRef(value), toRef(exec->exceptionSlot()));
259
260 ASSERT(0); // implementsHasInstance should prevent us from reaching here
261 return 0;
262}
263
264
265bool JSCallbackObject::implementsCall() const
266{
267 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
268 if (jsClass->callAsFunction)
269 return true;
270
271 return false;
272}
273
274JSValue* JSCallbackObject::callAsFunction(ExecState* exec, JSObject* thisObj, const List &args)
275{
276 JSContextRef execRef = toRef(exec);
277 JSObjectRef thisRef = toRef(this);
278 JSObjectRef thisObjRef = toRef(thisObj);
279
280 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
281 if (JSObjectCallAsFunctionCallback callAsFunction = jsClass->callAsFunction) {
282 size_t argumentCount = args.size();
283 JSValueRef arguments[argumentCount];
284 for (size_t i = 0; i < argumentCount; i++)
285 arguments[i] = toRef(args[i]);
286 return toJS(callAsFunction(execRef, thisRef, thisObjRef, argumentCount, arguments, toRef(exec->exceptionSlot())));
287 }
288 }
289
290 ASSERT(0); // implementsCall should prevent us from reaching here
291 return 0;
292}
293
294void JSCallbackObject::getPropertyNames(ExecState* exec, PropertyNameArray& propertyNames)
295{
296 JSContextRef execRef = toRef(exec);
297 JSObjectRef thisRef = toRef(this);
298
299 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass) {
300 if (JSObjectGetPropertyNamesCallback getPropertyNames = jsClass->getPropertyNames)
301 getPropertyNames(execRef, thisRef, toRef(&propertyNames));
302
303 if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues) {
304 typedef OpaqueJSClass::StaticValuesTable::const_iterator iterator;
305 iterator end = staticValues->end();
306 for (iterator it = staticValues->begin(); it != end; ++it) {
307 UString::Rep* name = it->first.get();
308 StaticValueEntry* entry = it->second;
309 if (entry->getProperty && !(entry->attributes & kJSPropertyAttributeDontEnum))
310 propertyNames.add(Identifier(name));
311 }
312 }
313
314 if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
315 typedef OpaqueJSClass::StaticFunctionsTable::const_iterator iterator;
316 iterator end = staticFunctions->end();
317 for (iterator it = staticFunctions->begin(); it != end; ++it) {
318 UString::Rep* name = it->first.get();
319 StaticFunctionEntry* entry = it->second;
320 if (!(entry->attributes & kJSPropertyAttributeDontEnum))
321 propertyNames.add(Identifier(name));
322 }
323 }
324 }
325
326 JSObject::getPropertyNames(exec, propertyNames);
327}
328
329double JSCallbackObject::toNumber(ExecState* exec) const
330{
331 JSContextRef ctx = toRef(exec);
332 JSObjectRef thisRef = toRef(this);
333
334 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
335 if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType)
336 if (JSValueRef value = convertToType(ctx, thisRef, kJSTypeNumber, toRef(exec->exceptionSlot())))
337 return toJS(value)->getNumber();
338
339 return JSObject::toNumber(exec);
340}
341
342UString JSCallbackObject::toString(ExecState* exec) const
343{
344 JSContextRef ctx = toRef(exec);
345 JSObjectRef thisRef = toRef(this);
346
347 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
348 if (JSObjectConvertToTypeCallback convertToType = jsClass->convertToType)
349 if (JSValueRef value = convertToType(ctx, thisRef, kJSTypeString, toRef(exec->exceptionSlot())))
350 return toJS(value)->getString();
351
352 return JSObject::toString(exec);
353}
354
355void JSCallbackObject::setPrivate(void* data)
356{
357 m_privateData = data;
358}
359
360void* JSCallbackObject::getPrivate()
361{
362 return m_privateData;
363}
364
365bool JSCallbackObject::inherits(JSClassRef c) const
366{
367 for (JSClassRef jsClass = m_class; jsClass; jsClass = jsClass->parentClass)
368 if (jsClass == c)
369 return true;
370
371 return false;
372}
373
374JSValue* JSCallbackObject::cachedValueGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot& slot)
375{
376 JSValue* v = slot.slotBase();
377 ASSERT(v);
378 return v;
379}
380
381JSValue* JSCallbackObject::staticValueGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot)
382{
383 ASSERT(slot.slotBase()->inherits(&JSCallbackObject::info));
384 JSCallbackObject* thisObj = static_cast<JSCallbackObject*>(slot.slotBase());
385
386 JSObjectRef thisRef = toRef(thisObj);
387 JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
388
389 for (JSClassRef jsClass = thisObj->m_class; jsClass; jsClass = jsClass->parentClass)
390 if (OpaqueJSClass::StaticValuesTable* staticValues = jsClass->staticValues)
391 if (StaticValueEntry* entry = staticValues->get(propertyName.ustring().rep()))
392 if (JSObjectGetPropertyCallback getProperty = entry->getProperty)
393 if (JSValueRef value = getProperty(toRef(exec), thisRef, propertyNameRef, toRef(exec->exceptionSlot())))
394 return toJS(value);
395
396 return throwError(exec, ReferenceError, "Static value property defined with NULL getProperty callback.");
397}
398
399JSValue* JSCallbackObject::staticFunctionGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot)
400{
401 ASSERT(slot.slotBase()->inherits(&JSCallbackObject::info));
402 JSCallbackObject* thisObj = static_cast<JSCallbackObject*>(slot.slotBase());
403
404 if (JSValue* cachedOrOverrideValue = thisObj->getDirect(propertyName))
405 return cachedOrOverrideValue;
406
407 for (JSClassRef jsClass = thisObj->m_class; jsClass; jsClass = jsClass->parentClass) {
408 if (OpaqueJSClass::StaticFunctionsTable* staticFunctions = jsClass->staticFunctions) {
409 if (StaticFunctionEntry* entry = staticFunctions->get(propertyName.ustring().rep())) {
410 if (JSObjectCallAsFunctionCallback callAsFunction = entry->callAsFunction) {
411 JSObject* o = new JSCallbackFunction(exec, callAsFunction, propertyName);
412 thisObj->putDirect(propertyName, o, entry->attributes);
413 return o;
414 }
415 }
416 }
417 }
418
419 return throwError(exec, ReferenceError, "Static function property defined with NULL callAsFunction callback.");
420}
421
422JSValue* JSCallbackObject::callbackGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot)
423{
424 ASSERT(slot.slotBase()->inherits(&JSCallbackObject::info));
425 JSCallbackObject* thisObj = static_cast<JSCallbackObject*>(slot.slotBase());
426
427 JSObjectRef thisRef = toRef(thisObj);
428 JSStringRef propertyNameRef = toRef(propertyName.ustring().rep());
429
430 for (JSClassRef jsClass = thisObj->m_class; jsClass; jsClass = jsClass->parentClass)
431 if (JSObjectGetPropertyCallback getProperty = jsClass->getProperty)
432 if (JSValueRef value = getProperty(toRef(exec), thisRef, propertyNameRef, toRef(exec->exceptionSlot())))
433 return toJS(value);
434
435 return throwError(exec, ReferenceError, "hasProperty callback returned true for a property that doesn't exist.");
436}
437
438} // namespace KJS
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