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 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 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->vm(), 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(info()));
55}
56
57EncodedJSValue RuntimeMethod::lengthGetter(ExecState* exec, JSObject*, EncodedJSValue thisValue, PropertyName)
58{
59    RuntimeMethod* thisObject = jsDynamicCast<RuntimeMethod*>(JSValue::decode(thisValue));
60    if (!thisObject)
61        return throwVMTypeError(exec);
62    return JSValue::encode(jsNumber(thisObject->m_method->numParameters()));
63}
64
65bool RuntimeMethod::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot &slot)
66{
67    RuntimeMethod* thisObject = jsCast<RuntimeMethod*>(object);
68    if (propertyName == exec->propertyNames().length) {
69        slot.setCacheableCustom(thisObject, DontDelete | ReadOnly | DontEnum, thisObject->lengthGetter);
70        return true;
71    }
72
73    return InternalFunction::getOwnPropertySlot(thisObject, exec, propertyName, slot);
74}
75
76static EncodedJSValue JSC_HOST_CALL callRuntimeMethod(ExecState* exec)
77{
78    RuntimeMethod* method = static_cast<RuntimeMethod*>(exec->callee());
79
80    if (!method->method())
81        return JSValue::encode(jsUndefined());
82
83    RefPtr<Instance> instance;
84
85    JSValue thisValue = exec->thisValue();
86    if (thisValue.inherits(RuntimeObject::info())) {
87        RuntimeObject* runtimeObject = static_cast<RuntimeObject*>(asObject(thisValue));
88        instance = runtimeObject->getInternalInstance();
89        if (!instance)
90            return JSValue::encode(RuntimeObject::throwInvalidAccessError(exec));
91    } else {
92        // Calling a runtime object of a plugin element?
93        if (thisValue.inherits(JSHTMLElement::info()))
94            instance = pluginInstance(jsCast<JSHTMLElement*>(asObject(thisValue))->impl());
95        if (!instance)
96            return throwVMTypeError(exec);
97    }
98    ASSERT(instance);
99
100    instance->begin();
101    JSValue result = instance->invokeMethod(exec, method);
102    instance->end();
103    return JSValue::encode(result);
104}
105
106CallType RuntimeMethod::getCallData(JSCell*, CallData& callData)
107{
108    callData.native.function = callRuntimeMethod;
109    return CallTypeHost;
110}
111
112}
113