1/*
2 * Copyright (C) 2003, 2008, 2009 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "runtime_object.h"
28
29#include "JSDOMBinding.h"
30#include "runtime_method.h"
31#include <runtime/Error.h>
32#include <runtime/ObjectPrototype.h>
33
34using namespace WebCore;
35
36namespace JSC {
37namespace Bindings {
38
39const ClassInfo RuntimeObject::s_info = { "RuntimeObject", &JSObjectWithGlobalObject::s_info, 0, 0 };
40
41RuntimeObject::RuntimeObject(ExecState*, JSGlobalObject* globalObject, Structure* structure, PassRefPtr<Instance> instance)
42    : JSObjectWithGlobalObject(globalObject, structure)
43    , m_instance(instance)
44{
45    ASSERT(inherits(&s_info));
46}
47
48RuntimeObject::~RuntimeObject()
49{
50}
51
52void RuntimeObject::invalidate()
53{
54    ASSERT(m_instance);
55    if (m_instance)
56        m_instance->willInvalidateRuntimeObject();
57    m_instance = 0;
58}
59
60JSValue RuntimeObject::fallbackObjectGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
61{
62    RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
63    RefPtr<Instance> instance = thisObj->m_instance;
64
65    if (!instance)
66        return throwInvalidAccessError(exec);
67
68    instance->begin();
69
70    Class *aClass = instance->getClass();
71    JSValue result = aClass->fallbackObject(exec, instance.get(), propertyName);
72
73    instance->end();
74
75    return result;
76}
77
78JSValue RuntimeObject::fieldGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
79{
80    RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
81    RefPtr<Instance> instance = thisObj->m_instance;
82
83    if (!instance)
84        return throwInvalidAccessError(exec);
85
86    instance->begin();
87
88    Class *aClass = instance->getClass();
89    Field* aField = aClass->fieldNamed(propertyName, instance.get());
90    JSValue result = aField->valueFromInstance(exec, instance.get());
91
92    instance->end();
93
94    return result;
95}
96
97JSValue RuntimeObject::methodGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
98{
99    RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
100    RefPtr<Instance> instance = thisObj->m_instance;
101
102    if (!instance)
103        return throwInvalidAccessError(exec);
104
105    instance->begin();
106
107    JSValue method = instance->getMethod(exec, propertyName);
108
109    instance->end();
110
111    return method;
112}
113
114bool RuntimeObject::getOwnPropertySlot(ExecState *exec, const Identifier& propertyName, PropertySlot& slot)
115{
116    if (!m_instance) {
117        throwInvalidAccessError(exec);
118        return false;
119    }
120
121    RefPtr<Instance> instance = m_instance;
122
123    instance->begin();
124
125    Class *aClass = instance->getClass();
126
127    if (aClass) {
128        // See if the instance has a field with the specified name.
129        Field *aField = aClass->fieldNamed(propertyName, instance.get());
130        if (aField) {
131            slot.setCustom(this, fieldGetter);
132            instance->end();
133            return true;
134        } else {
135            // Now check if a method with specified name exists, if so return a function object for
136            // that method.
137            MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
138            if (methodList.size() > 0) {
139                slot.setCustom(this, methodGetter);
140
141                instance->end();
142                return true;
143            }
144        }
145
146        // Try a fallback object.
147        if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
148            slot.setCustom(this, fallbackObjectGetter);
149            instance->end();
150            return true;
151        }
152    }
153
154    instance->end();
155
156    return instance->getOwnPropertySlot(this, exec, propertyName, slot);
157}
158
159bool RuntimeObject::getOwnPropertyDescriptor(ExecState *exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
160{
161    if (!m_instance) {
162        throwInvalidAccessError(exec);
163        return false;
164    }
165
166    RefPtr<Instance> instance = m_instance;
167    instance->begin();
168
169    Class *aClass = instance->getClass();
170
171    if (aClass) {
172        // See if the instance has a field with the specified name.
173        Field *aField = aClass->fieldNamed(propertyName, instance.get());
174        if (aField) {
175            PropertySlot slot;
176            slot.setCustom(this, fieldGetter);
177            instance->end();
178            descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete);
179            return true;
180        } else {
181            // Now check if a method with specified name exists, if so return a function object for
182            // that method.
183            MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
184            if (methodList.size() > 0) {
185                PropertySlot slot;
186                slot.setCustom(this, methodGetter);
187                instance->end();
188                descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | ReadOnly);
189                return true;
190            }
191        }
192
193        // Try a fallback object.
194        if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
195            PropertySlot slot;
196            slot.setCustom(this, fallbackObjectGetter);
197            instance->end();
198            descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | ReadOnly | DontEnum);
199            return true;
200        }
201    }
202
203    instance->end();
204
205    return instance->getOwnPropertyDescriptor(this, exec, propertyName, descriptor);
206}
207
208void RuntimeObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
209{
210    if (!m_instance) {
211        throwInvalidAccessError(exec);
212        return;
213    }
214
215    RefPtr<Instance> instance = m_instance;
216    instance->begin();
217
218    // Set the value of the property.
219    Field *aField = instance->getClass()->fieldNamed(propertyName, instance.get());
220    if (aField)
221        aField->setValueToInstance(exec, instance.get(), value);
222    else if (!instance->setValueOfUndefinedField(exec, propertyName, value))
223        instance->put(this, exec, propertyName, value, slot);
224
225    instance->end();
226}
227
228bool RuntimeObject::deleteProperty(ExecState*, const Identifier&)
229{
230    // Can never remove a property of a RuntimeObject.
231    return false;
232}
233
234JSValue RuntimeObject::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
235{
236    if (!m_instance)
237        return throwInvalidAccessError(exec);
238
239    RefPtr<Instance> instance = m_instance;
240
241    instance->begin();
242    JSValue result = instance->defaultValue(exec, hint);
243    instance->end();
244    return result;
245}
246
247static EncodedJSValue JSC_HOST_CALL callRuntimeObject(ExecState* exec)
248{
249    ASSERT(exec->callee()->inherits(&RuntimeObject::s_info));
250    RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->callee())->getInternalInstance());
251    instance->begin();
252    JSValue result = instance->invokeDefaultMethod(exec);
253    instance->end();
254    return JSValue::encode(result);
255}
256
257CallType RuntimeObject::getCallData(CallData& callData)
258{
259    if (!m_instance)
260        return CallTypeNone;
261
262    RefPtr<Instance> instance = m_instance;
263    if (!instance->supportsInvokeDefaultMethod())
264        return CallTypeNone;
265
266    callData.native.function = callRuntimeObject;
267    return CallTypeHost;
268}
269
270static EncodedJSValue JSC_HOST_CALL callRuntimeConstructor(ExecState* exec)
271{
272    JSObject* constructor = exec->callee();
273    ASSERT(constructor->inherits(&RuntimeObject::s_info));
274    RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->callee())->getInternalInstance());
275    instance->begin();
276    ArgList args(exec);
277    JSValue result = instance->invokeConstruct(exec, args);
278    instance->end();
279
280    ASSERT(result);
281    return JSValue::encode(result.isObject() ? static_cast<JSObject*>(result.asCell()) : constructor);
282}
283
284ConstructType RuntimeObject::getConstructData(ConstructData& constructData)
285{
286    if (!m_instance)
287        return ConstructTypeNone;
288
289    RefPtr<Instance> instance = m_instance;
290    if (!instance->supportsConstruct())
291        return ConstructTypeNone;
292
293    constructData.native.function = callRuntimeConstructor;
294    return ConstructTypeHost;
295}
296
297void RuntimeObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode)
298{
299    if (!m_instance) {
300        throwInvalidAccessError(exec);
301        return;
302    }
303
304    RefPtr<Instance> instance = m_instance;
305
306    instance->begin();
307    instance->getPropertyNames(exec, propertyNames);
308    instance->end();
309}
310
311JSObject* RuntimeObject::throwInvalidAccessError(ExecState* exec)
312{
313    return throwError(exec, createReferenceError(exec, "Trying to access object from destroyed plug-in."));
314}
315
316}
317}
318