1/*
2 * Copyright (C) 2003, 2008 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_method.h"
28
29#include "JSDOMBinding.h"
30#include "JSHTMLElement.h"
31#include "JSPluginElementFunctions.h"
32#include "runtime_object.h"
33#include <runtime/Error.h>
34#include <runtime/FunctionPrototype.h>
35
36using namespace WebCore;
37
38namespace JSC {
39
40using namespace Bindings;
41
42const ClassInfo RuntimeMethod::s_info = { "RuntimeMethod", &InternalFunction::s_info, 0, 0, CREATE_METHOD_TABLE(RuntimeMethod) };
43
44RuntimeMethod::RuntimeMethod(JSGlobalObject* globalObject, Structure* structure, Method* method)
45    // Callers will need to pass in the right global object corresponding to this native object "method".
46    : InternalFunction(globalObject, structure)
47    , m_method(method)
48{
49}
50
51void RuntimeMethod::finishCreation(VM& vm, const String& ident)
52{
53    Base::finishCreation(vm, ident);
54    ASSERT(inherits(&s_info));
55}
56
57JSValue RuntimeMethod::lengthGetter(ExecState*, JSValue slotBase, PropertyName)
58{
59    RuntimeMethod* thisObj = static_cast<RuntimeMethod*>(asObject(slotBase));
60
61    return jsNumber(thisObj->m_method->numParameters());
62}
63
64bool RuntimeMethod::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
65{
66    RuntimeMethod* thisObject = jsCast<RuntimeMethod*>(cell);
67    if (propertyName == exec->propertyNames().length) {
68        slot.setCacheableCustom(thisObject, thisObject->lengthGetter);
69        return true;
70    }
71
72    return InternalFunction::getOwnPropertySlot(thisObject, exec, propertyName, slot);
73}
74
75bool RuntimeMethod::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor &descriptor)
76{
77    RuntimeMethod* thisObject = jsCast<RuntimeMethod*>(object);
78    if (propertyName == exec->propertyNames().length) {
79        PropertySlot slot;
80        slot.setCustom(thisObject, lengthGetter);
81        descriptor.setDescriptor(slot.getValue(exec, propertyName), ReadOnly | DontDelete | DontEnum);
82        return true;
83    }
84
85    return InternalFunction::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
86}
87
88static EncodedJSValue JSC_HOST_CALL callRuntimeMethod(ExecState* exec)
89{
90    RuntimeMethod* method = static_cast<RuntimeMethod*>(exec->callee());
91
92    if (!method->method())
93        return JSValue::encode(jsUndefined());
94
95    RefPtr<Instance> instance;
96
97    JSValue thisValue = exec->hostThisValue();
98    if (thisValue.inherits(&RuntimeObject::s_info)) {
99        RuntimeObject* runtimeObject = static_cast<RuntimeObject*>(asObject(thisValue));
100        instance = runtimeObject->getInternalInstance();
101        if (!instance)
102            return JSValue::encode(RuntimeObject::throwInvalidAccessError(exec));
103    } else {
104        // Calling a runtime object of a plugin element?
105        if (thisValue.inherits(&JSHTMLElement::s_info)) {
106            HTMLElement* element = jsCast<JSHTMLElement*>(asObject(thisValue))->impl();
107            instance = pluginInstance(element);
108        }
109        if (!instance)
110            return throwVMTypeError(exec);
111    }
112    ASSERT(instance);
113
114    instance->begin();
115    JSValue result = instance->invokeMethod(exec, method);
116    instance->end();
117    return JSValue::encode(result);
118}
119
120CallType RuntimeMethod::getCallData(JSCell*, CallData& callData)
121{
122    callData.native.function = callRuntimeMethod;
123    return CallTypeHost;
124}
125
126}
127