Home | History | Annotate | Download | only in bridge 
      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 "runtime_object.h"
     31 #include <runtime/Error.h>
     32 #include <runtime/FunctionPrototype.h>
     33 
     34 using namespace WebCore;
     35 
     36 namespace JSC {
     37 
     38 using namespace Bindings;
     39 
     40 ASSERT_CLASS_FITS_IN_CELL(RuntimeMethod);
     41 
     42 const ClassInfo RuntimeMethod::s_info = { "RuntimeMethod", 0, 0, 0 };
     43 
     44 RuntimeMethod::RuntimeMethod(ExecState* exec, const Identifier& ident, Bindings::MethodList& m)
     45     // FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
     46     // exec-globalData() is also likely wrong.
     47     // Callers will need to pass in the right global object corresponding to this native object "m".
     48     : InternalFunction(&exec->globalData(), deprecatedGetDOMStructure<RuntimeMethod>(exec), ident)
     49     , _methodList(new MethodList(m))
     50 {
     51 }
     52 
     53 JSValue RuntimeMethod::lengthGetter(ExecState* exec, const Identifier&, const PropertySlot& slot)
     54 {
     55     RuntimeMethod* thisObj = static_cast<RuntimeMethod*>(asObject(slot.slotBase()));
     56 
     57     // Ick!  There may be more than one method with this name.  Arbitrarily
     58     // just pick the first method.  The fundamental problem here is that
     59     // JavaScript doesn't have the notion of method overloading and
     60     // Java does.
     61     // FIXME: a better solution might be to give the maximum number of parameters
     62     // of any method
     63     return jsNumber(exec, thisObj->_methodList->at(0)->numParameters());
     64 }
     65 
     66 bool RuntimeMethod::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot &slot)
     67 {
     68     if (propertyName == exec->propertyNames().length) {
     69         slot.setCustom(this, lengthGetter);
     70         return true;
     71     }
     72 
     73     return InternalFunction::getOwnPropertySlot(exec, propertyName, slot);
     74 }
     75 
     76 bool RuntimeMethod::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor &descriptor)
     77 {
     78     if (propertyName == exec->propertyNames().length) {
     79         PropertySlot slot;
     80         slot.setCustom(this, lengthGetter);
     81         descriptor.setDescriptor(slot.getValue(exec, propertyName), ReadOnly | DontDelete | DontEnum);
     82         return true;
     83     }
     84 
     85     return InternalFunction::getOwnPropertyDescriptor(exec, propertyName, descriptor);
     86 }
     87 
     88 static JSValue JSC_HOST_CALL callRuntimeMethod(ExecState* exec, JSObject* function, JSValue thisValue, const ArgList& args)
     89 {
     90     RuntimeMethod* method = static_cast<RuntimeMethod*>(function);
     91 
     92     if (method->methods()->isEmpty())
     93         return jsUndefined();
     94 
     95     RuntimeObjectImp* imp;
     96 
     97     if (thisValue.inherits(&RuntimeObjectImp::s_info)) {
     98         imp = static_cast<RuntimeObjectImp*>(asObject(thisValue));
     99     } else {
    100         // If thisObj is the DOM object for a plugin, get the corresponding
    101         // runtime object from the DOM object.
    102         JSValue value = thisValue.get(exec, Identifier(exec, "__apple_runtime_object"));
    103         if (value.inherits(&RuntimeObjectImp::s_info))
    104             imp = static_cast<RuntimeObjectImp*>(asObject(value));
    105         else
    106             return throwError(exec, TypeError);
    107     }
    108 
    109     RefPtr<Instance> instance = imp->getInternalInstance();
    110     if (!instance)
    111         return RuntimeObjectImp::throwInvalidAccessError(exec);
    112 
    113     instance->begin();
    114     JSValue result = instance->invokeMethod(exec, *method->methods(), args);
    115     instance->end();
    116     return result;
    117 }
    118 
    119 CallType RuntimeMethod::getCallData(CallData& callData)
    120 {
    121     callData.native.function = callRuntimeMethod;
    122     return CallTypeHost;
    123 }
    124 
    125 }
    126