1 | /* |
2 | * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) |
3 | * Copyright (C) 2008 Apple Inc. All rights reserved. |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Lesser General Public |
16 | * License along with this library; if not, write to the Free Software |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
18 | * |
19 | */ |
20 | |
21 | #include "config.h" |
22 | #include "ObjectConstructor.h" |
23 | |
24 | #include "Error.h" |
25 | #include "JSFunction.h" |
26 | #include "JSArray.h" |
27 | #include "JSGlobalObject.h" |
28 | #include "ObjectPrototype.h" |
29 | #include "PropertyDescriptor.h" |
30 | #include "PropertyNameArray.h" |
31 | #include "PrototypeFunction.h" |
32 | |
33 | namespace JSC { |
34 | |
35 | ASSERT_CLASS_FITS_IN_CELL(ObjectConstructor); |
36 | |
37 | static JSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState*, JSObject*, JSValue, const ArgList&); |
38 | static JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState*, JSObject*, JSValue, const ArgList&); |
39 | static JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState*, JSObject*, JSValue, const ArgList&); |
40 | static JSValue JSC_HOST_CALL objectConstructorKeys(ExecState*, JSObject*, JSValue, const ArgList&); |
41 | static JSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState*, JSObject*, JSValue, const ArgList&); |
42 | static JSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState*, JSObject*, JSValue, const ArgList&); |
43 | static JSValue JSC_HOST_CALL objectConstructorCreate(ExecState*, JSObject*, JSValue, const ArgList&); |
44 | |
45 | ObjectConstructor::ObjectConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, ObjectPrototype* objectPrototype, Structure* prototypeFunctionStructure) |
46 | : InternalFunction(&exec->globalData(), structure, Identifier(exec, "Object" )) |
47 | { |
48 | // ECMA 15.2.3.1 |
49 | putDirectWithoutTransition(propertyName: exec->propertyNames().prototype, value: objectPrototype, attributes: DontEnum | DontDelete | ReadOnly); |
50 | |
51 | // no. of arguments for constructor |
52 | putDirectWithoutTransition(propertyName: exec->propertyNames().length, value: jsNumber(exec, i: 1), attributes: ReadOnly | DontEnum | DontDelete); |
53 | |
54 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().getPrototypeOf, objectConstructorGetPrototypeOf), attr: DontEnum); |
55 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 2, exec->propertyNames().getOwnPropertyDescriptor, objectConstructorGetOwnPropertyDescriptor), attr: DontEnum); |
56 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().getOwnPropertyNames, objectConstructorGetOwnPropertyNames), attr: DontEnum); |
57 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().keys, objectConstructorKeys), attr: DontEnum); |
58 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 3, exec->propertyNames().defineProperty, objectConstructorDefineProperty), attr: DontEnum); |
59 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 2, exec->propertyNames().defineProperties, objectConstructorDefineProperties), attr: DontEnum); |
60 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 2, exec->propertyNames().create, objectConstructorCreate), attr: DontEnum); |
61 | } |
62 | |
63 | // ECMA 15.2.2 |
64 | static ALWAYS_INLINE JSObject* constructObject(ExecState* exec, const ArgList& args) |
65 | { |
66 | JSValue arg = args.at(idx: 0); |
67 | if (arg.isUndefinedOrNull()) |
68 | return new (exec) JSObject(exec->lexicalGlobalObject()->emptyObjectStructure()); |
69 | return arg.toObject(exec); |
70 | } |
71 | |
72 | static JSObject* constructWithObjectConstructor(ExecState* exec, JSObject*, const ArgList& args) |
73 | { |
74 | return constructObject(exec, args); |
75 | } |
76 | |
77 | ConstructType ObjectConstructor::getConstructData(ConstructData& constructData) |
78 | { |
79 | constructData.native.function = constructWithObjectConstructor; |
80 | return ConstructTypeHost; |
81 | } |
82 | |
83 | static JSValue JSC_HOST_CALL callObjectConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
84 | { |
85 | return constructObject(exec, args); |
86 | } |
87 | |
88 | CallType ObjectConstructor::getCallData(CallData& callData) |
89 | { |
90 | callData.native.function = callObjectConstructor; |
91 | return CallTypeHost; |
92 | } |
93 | |
94 | JSValue JSC_HOST_CALL objectConstructorGetPrototypeOf(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
95 | { |
96 | if (!args.at(idx: 0).isObject()) |
97 | return throwError(exec, TypeError, message: "Requested prototype of a value that is not an object." ); |
98 | return asObject(value: args.at(idx: 0))->prototype(); |
99 | } |
100 | |
101 | JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyDescriptor(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
102 | { |
103 | if (!args.at(idx: 0).isObject()) |
104 | return throwError(exec, TypeError, message: "Requested property descriptor of a value that is not an object." ); |
105 | UString propertyName = args.at(idx: 1).toString(exec); |
106 | if (exec->hadException()) |
107 | return jsNull(); |
108 | JSObject* object = asObject(value: args.at(idx: 0)); |
109 | PropertyDescriptor descriptor; |
110 | if (!object->getOwnPropertyDescriptor(exec, Identifier(exec, propertyName), descriptor)) |
111 | return jsUndefined(); |
112 | if (exec->hadException()) |
113 | return jsUndefined(); |
114 | |
115 | JSObject* description = constructEmptyObject(exec); |
116 | if (!descriptor.isAccessorDescriptor()) { |
117 | description->putDirect(propertyName: exec->propertyNames().value, value: descriptor.value() ? descriptor.value() : jsUndefined(), attributes: 0); |
118 | description->putDirect(propertyName: exec->propertyNames().writable, value: jsBoolean(b: descriptor.writable()), attributes: 0); |
119 | } else { |
120 | description->putDirect(propertyName: exec->propertyNames().get, value: descriptor.getter() ? descriptor.getter() : jsUndefined(), attributes: 0); |
121 | description->putDirect(propertyName: exec->propertyNames().set, value: descriptor.setter() ? descriptor.setter() : jsUndefined(), attributes: 0); |
122 | } |
123 | |
124 | description->putDirect(propertyName: exec->propertyNames().enumerable, value: jsBoolean(b: descriptor.enumerable()), attributes: 0); |
125 | description->putDirect(propertyName: exec->propertyNames().configurable, value: jsBoolean(b: descriptor.configurable()), attributes: 0); |
126 | |
127 | return description; |
128 | } |
129 | |
130 | // FIXME: Use the enumeration cache. |
131 | JSValue JSC_HOST_CALL objectConstructorGetOwnPropertyNames(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
132 | { |
133 | if (!args.at(idx: 0).isObject()) |
134 | return throwError(exec, TypeError, message: "Requested property names of a value that is not an object." ); |
135 | PropertyNameArray properties(exec); |
136 | asObject(value: args.at(idx: 0))->getOwnPropertyNames(exec, properties, mode: IncludeDontEnumProperties); |
137 | JSArray* names = constructEmptyArray(exec); |
138 | size_t numProperties = properties.size(); |
139 | for (size_t i = 0; i < numProperties; i++) |
140 | names->push(exec, jsOwnedString(exec, s: properties[i].ustring())); |
141 | return names; |
142 | } |
143 | |
144 | // FIXME: Use the enumeration cache. |
145 | JSValue JSC_HOST_CALL objectConstructorKeys(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
146 | { |
147 | if (!args.at(idx: 0).isObject()) |
148 | return throwError(exec, TypeError, message: "Requested keys of a value that is not an object." ); |
149 | PropertyNameArray properties(exec); |
150 | asObject(value: args.at(idx: 0))->getOwnPropertyNames(exec, properties); |
151 | JSArray* keys = constructEmptyArray(exec); |
152 | size_t numProperties = properties.size(); |
153 | for (size_t i = 0; i < numProperties; i++) |
154 | keys->push(exec, jsOwnedString(exec, s: properties[i].ustring())); |
155 | return keys; |
156 | } |
157 | |
158 | // ES5 8.10.5 ToPropertyDescriptor |
159 | static bool toPropertyDescriptor(ExecState* exec, JSValue in, PropertyDescriptor& desc) |
160 | { |
161 | if (!in.isObject()) { |
162 | throwError(exec, TypeError, message: "Property description must be an object." ); |
163 | return false; |
164 | } |
165 | JSObject* description = asObject(value: in); |
166 | |
167 | PropertySlot enumerableSlot(description); |
168 | if (description->getPropertySlot(exec, propertyName: exec->propertyNames().enumerable, slot&: enumerableSlot)) { |
169 | desc.setEnumerable(enumerableSlot.getValue(exec, propertyName: exec->propertyNames().enumerable).toBoolean(exec)); |
170 | if (exec->hadException()) |
171 | return false; |
172 | } |
173 | |
174 | PropertySlot configurableSlot(description); |
175 | if (description->getPropertySlot(exec, propertyName: exec->propertyNames().configurable, slot&: configurableSlot)) { |
176 | desc.setConfigurable(configurableSlot.getValue(exec, propertyName: exec->propertyNames().configurable).toBoolean(exec)); |
177 | if (exec->hadException()) |
178 | return false; |
179 | } |
180 | |
181 | JSValue value; |
182 | PropertySlot valueSlot(description); |
183 | if (description->getPropertySlot(exec, propertyName: exec->propertyNames().value, slot&: valueSlot)) { |
184 | desc.setValue(valueSlot.getValue(exec, propertyName: exec->propertyNames().value)); |
185 | if (exec->hadException()) |
186 | return false; |
187 | } |
188 | |
189 | PropertySlot writableSlot(description); |
190 | if (description->getPropertySlot(exec, propertyName: exec->propertyNames().writable, slot&: writableSlot)) { |
191 | desc.setWritable(writableSlot.getValue(exec, propertyName: exec->propertyNames().writable).toBoolean(exec)); |
192 | if (exec->hadException()) |
193 | return false; |
194 | } |
195 | |
196 | PropertySlot getSlot(description); |
197 | if (description->getPropertySlot(exec, propertyName: exec->propertyNames().get, slot&: getSlot)) { |
198 | JSValue get = getSlot.getValue(exec, propertyName: exec->propertyNames().get); |
199 | if (exec->hadException()) |
200 | return false; |
201 | if (!get.isUndefined()) { |
202 | CallData callData; |
203 | if (get.getCallData(callData) == CallTypeNone) { |
204 | throwError(exec, TypeError, message: "Getter must be a function." ); |
205 | return false; |
206 | } |
207 | } else |
208 | get = JSValue(); |
209 | desc.setGetter(get); |
210 | } |
211 | |
212 | PropertySlot setSlot(description); |
213 | if (description->getPropertySlot(exec, propertyName: exec->propertyNames().set, slot&: setSlot)) { |
214 | JSValue set = setSlot.getValue(exec, propertyName: exec->propertyNames().set); |
215 | if (exec->hadException()) |
216 | return false; |
217 | if (!set.isUndefined()) { |
218 | CallData callData; |
219 | if (set.getCallData(callData) == CallTypeNone) { |
220 | throwError(exec, TypeError, message: "Setter must be a function." ); |
221 | return false; |
222 | } |
223 | } else |
224 | set = JSValue(); |
225 | |
226 | desc.setSetter(set); |
227 | } |
228 | |
229 | if (!desc.isAccessorDescriptor()) |
230 | return true; |
231 | |
232 | if (desc.value()) { |
233 | throwError(exec, TypeError, message: "Invalid property. 'value' present on property with getter or setter." ); |
234 | return false; |
235 | } |
236 | |
237 | if (desc.writablePresent()) { |
238 | throwError(exec, TypeError, message: "Invalid property. 'writable' present on property with getter or setter." ); |
239 | return false; |
240 | } |
241 | return true; |
242 | } |
243 | |
244 | JSValue JSC_HOST_CALL objectConstructorDefineProperty(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
245 | { |
246 | if (!args.at(idx: 0).isObject()) |
247 | return throwError(exec, TypeError, message: "Properties can only be defined on Objects." ); |
248 | JSObject* O = asObject(value: args.at(idx: 0)); |
249 | UString propertyName = args.at(idx: 1).toString(exec); |
250 | if (exec->hadException()) |
251 | return jsNull(); |
252 | PropertyDescriptor descriptor; |
253 | if (!toPropertyDescriptor(exec, in: args.at(idx: 2), desc&: descriptor)) |
254 | return jsNull(); |
255 | ASSERT((descriptor.attributes() & (Getter | Setter)) || (!descriptor.isAccessorDescriptor())); |
256 | ASSERT(!exec->hadException()); |
257 | O->defineOwnProperty(exec, propertyName: Identifier(exec, propertyName), descriptor, shouldThrow: true); |
258 | return O; |
259 | } |
260 | |
261 | static JSValue defineProperties(ExecState* exec, JSObject* object, JSObject* properties) |
262 | { |
263 | PropertyNameArray propertyNames(exec); |
264 | asObject(cell: properties)->getOwnPropertyNames(exec, propertyNames); |
265 | size_t numProperties = propertyNames.size(); |
266 | Vector<PropertyDescriptor> descriptors; |
267 | MarkedArgumentBuffer markBuffer; |
268 | for (size_t i = 0; i < numProperties; i++) { |
269 | PropertySlot slot; |
270 | JSValue prop = properties->get(exec, propertyName: propertyNames[i]); |
271 | if (exec->hadException()) |
272 | return jsNull(); |
273 | PropertyDescriptor descriptor; |
274 | if (!toPropertyDescriptor(exec, in: prop, desc&: descriptor)) |
275 | return jsNull(); |
276 | descriptors.append(val: descriptor); |
277 | // Ensure we mark all the values that we're accumulating |
278 | if (descriptor.isDataDescriptor() && descriptor.value()) |
279 | markBuffer.append(v: descriptor.value()); |
280 | if (descriptor.isAccessorDescriptor()) { |
281 | if (descriptor.getter()) |
282 | markBuffer.append(v: descriptor.getter()); |
283 | if (descriptor.setter()) |
284 | markBuffer.append(v: descriptor.setter()); |
285 | } |
286 | } |
287 | for (size_t i = 0; i < numProperties; i++) { |
288 | object->defineOwnProperty(exec, propertyName: propertyNames[i], descriptors[i], shouldThrow: true); |
289 | if (exec->hadException()) |
290 | return jsNull(); |
291 | } |
292 | return object; |
293 | } |
294 | |
295 | JSValue JSC_HOST_CALL objectConstructorDefineProperties(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
296 | { |
297 | if (!args.at(idx: 0).isObject()) |
298 | return throwError(exec, TypeError, message: "Properties can only be defined on Objects." ); |
299 | if (!args.at(idx: 1).isObject()) |
300 | return throwError(exec, TypeError, message: "Property descriptor list must be an Object." ); |
301 | return defineProperties(exec, object: asObject(value: args.at(idx: 0)), properties: asObject(value: args.at(idx: 1))); |
302 | } |
303 | |
304 | JSValue JSC_HOST_CALL objectConstructorCreate(ExecState* exec, JSObject*, JSValue, const ArgList& args) |
305 | { |
306 | if (!args.at(idx: 0).isObject() && !args.at(idx: 0).isNull()) |
307 | return throwError(exec, TypeError, message: "Object prototype may only be an Object or null." ); |
308 | JSObject* newObject = constructEmptyObject(exec); |
309 | newObject->setPrototype(args.at(idx: 0)); |
310 | if (args.at(idx: 1).isUndefined()) |
311 | return newObject; |
312 | if (!args.at(idx: 1).isObject()) |
313 | return throwError(exec, TypeError, message: "Property descriptor list must be an Object." ); |
314 | return defineProperties(exec, object: newObject, properties: asObject(value: args.at(idx: 1))); |
315 | } |
316 | |
317 | } // namespace JSC |
318 | |