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
36 using namespace WebCore;
37
38 namespace JSC {
39
40 using namespace Bindings;
41
42 ASSERT_CLASS_FITS_IN_CELL(RuntimeMethod);
43
44 const ClassInfo RuntimeMethod::s_info = { "RuntimeMethod", &InternalFunction::s_info, 0, 0 };
45
RuntimeMethod(ExecState * exec,JSGlobalObject * globalObject,Structure * structure,const Identifier & ident,Bindings::MethodList & m)46 RuntimeMethod::RuntimeMethod(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, const Identifier& ident, Bindings::MethodList& m)
47 // Callers will need to pass in the right global object corresponding to this native object "m".
48 : InternalFunction(&exec->globalData(), globalObject, structure, ident)
49 , _methodList(adoptPtr(new MethodList(m)))
50 {
51 ASSERT(inherits(&s_info));
52 }
53
lengthGetter(ExecState *,JSValue slotBase,const Identifier &)54 JSValue RuntimeMethod::lengthGetter(ExecState*, JSValue slotBase, const Identifier&)
55 {
56 RuntimeMethod* thisObj = static_cast<RuntimeMethod*>(asObject(slotBase));
57
58 // Ick! There may be more than one method with this name. Arbitrarily
59 // just pick the first method. The fundamental problem here is that
60 // JavaScript doesn't have the notion of method overloading and
61 // Java does.
62 // FIXME: a better solution might be to give the maximum number of parameters
63 // of any method
64 return jsNumber(thisObj->_methodList->at(0)->numParameters());
65 }
66
getOwnPropertySlot(ExecState * exec,const Identifier & propertyName,PropertySlot & slot)67 bool RuntimeMethod::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot &slot)
68 {
69 if (propertyName == exec->propertyNames().length) {
70 slot.setCacheableCustom(this, lengthGetter);
71 return true;
72 }
73
74 return InternalFunction::getOwnPropertySlot(exec, propertyName, slot);
75 }
76
getOwnPropertyDescriptor(ExecState * exec,const Identifier & propertyName,PropertyDescriptor & descriptor)77 bool RuntimeMethod::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor &descriptor)
78 {
79 if (propertyName == exec->propertyNames().length) {
80 PropertySlot slot;
81 slot.setCustom(this, lengthGetter);
82 descriptor.setDescriptor(slot.getValue(exec, propertyName), ReadOnly | DontDelete | DontEnum);
83 return true;
84 }
85
86 return InternalFunction::getOwnPropertyDescriptor(exec, propertyName, descriptor);
87 }
88
callRuntimeMethod(ExecState * exec)89 static EncodedJSValue JSC_HOST_CALL callRuntimeMethod(ExecState* exec)
90 {
91 RuntimeMethod* method = static_cast<RuntimeMethod*>(exec->callee());
92
93 if (method->methods()->isEmpty())
94 return JSValue::encode(jsUndefined());
95
96 RefPtr<Instance> instance;
97
98 JSValue thisValue = exec->hostThisValue();
99 if (thisValue.inherits(&RuntimeObject::s_info)) {
100 RuntimeObject* runtimeObject = static_cast<RuntimeObject*>(asObject(thisValue));
101 instance = runtimeObject->getInternalInstance();
102 if (!instance)
103 return JSValue::encode(RuntimeObject::throwInvalidAccessError(exec));
104 } else {
105 // Calling a runtime object of a plugin element?
106 if (thisValue.inherits(&JSHTMLElement::s_info)) {
107 HTMLElement* element = static_cast<JSHTMLElement*>(asObject(thisValue))->impl();
108 instance = pluginInstance(element);
109 }
110 if (!instance)
111 return throwVMTypeError(exec);
112 }
113 ASSERT(instance);
114
115 instance->begin();
116 JSValue result = instance->invokeMethod(exec, method);
117 instance->end();
118 return JSValue::encode(result);
119 }
120
getCallData(CallData & callData)121 CallType RuntimeMethod::getCallData(CallData& callData)
122 {
123 callData.native.function = callRuntimeMethod;
124 return CallTypeHost;
125 }
126
127 }
128