1 /*
2  * Copyright (C) 2003, 2006 Apple Computer, 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 
28 #if ENABLE(NETSCAPE_PLUGIN_API)
29 
30 #include "c_instance.h"
31 
32 #include "CRuntimeObject.h"
33 #include "IdentifierRep.h"
34 #include "JSDOMBinding.h"
35 #include "c_class.h"
36 #include "c_runtime.h"
37 #include "c_utility.h"
38 #include "npruntime_impl.h"
39 #include "runtime_method.h"
40 #include "runtime_root.h"
41 #include <interpreter/CallFrame.h>
42 #include <runtime/ArgList.h>
43 #include <runtime/Error.h>
44 #include <runtime/FunctionPrototype.h>
45 #include <runtime/JSLock.h>
46 #include <runtime/PropertyNameArray.h>
47 #include <wtf/Assertions.h>
48 #include <wtf/StdLibExtras.h>
49 #include <wtf/StringExtras.h>
50 #include <wtf/Vector.h>
51 
52 using namespace WebCore;
53 
54 namespace JSC {
55 namespace Bindings {
56 
57 using JSC::UString;
58 
globalExceptionString()59 static JSC::UString& globalExceptionString()
60 {
61     DEFINE_STATIC_LOCAL(JSC::UString, exceptionStr, ());
62     return exceptionStr;
63 }
64 
setGlobalException(UString exception)65 void CInstance::setGlobalException(UString exception)
66 {
67     globalExceptionString() = exception;
68 }
69 
moveGlobalExceptionToExecState(ExecState * exec)70 void CInstance::moveGlobalExceptionToExecState(ExecState* exec)
71 {
72     if (globalExceptionString().isNull())
73         return;
74 
75     {
76         JSLock lock(SilenceAssertionsOnly);
77         throwError(exec, createError(exec, globalExceptionString()));
78     }
79 
80     globalExceptionString() = UString();
81 }
82 
CInstance(NPObject * o,PassRefPtr<RootObject> rootObject)83 CInstance::CInstance(NPObject* o, PassRefPtr<RootObject> rootObject)
84     : Instance(rootObject)
85 {
86     _object = _NPN_RetainObject(o);
87     _class = 0;
88 }
89 
~CInstance()90 CInstance::~CInstance()
91 {
92     _NPN_ReleaseObject(_object);
93 }
94 
newRuntimeObject(ExecState * exec)95 RuntimeObject* CInstance::newRuntimeObject(ExecState* exec)
96 {
97     return new (exec) CRuntimeObject(exec, exec->lexicalGlobalObject(), this);
98 }
99 
getClass() const100 Class *CInstance::getClass() const
101 {
102     if (!_class)
103         _class = CClass::classForIsA(_object->_class);
104     return _class;
105 }
106 
supportsInvokeDefaultMethod() const107 bool CInstance::supportsInvokeDefaultMethod() const
108 {
109     return _object->_class->invokeDefault;
110 }
111 
112 class CRuntimeMethod : public RuntimeMethod {
113 public:
CRuntimeMethod(ExecState * exec,JSGlobalObject * globalObject,const Identifier & name,Bindings::MethodList & list)114     CRuntimeMethod(ExecState* exec, JSGlobalObject* globalObject, const Identifier& name, Bindings::MethodList& list)
115         // FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object
116         // We need to pass in the right global object for "i".
117         : RuntimeMethod(exec, globalObject, WebCore::deprecatedGetDOMStructure<CRuntimeMethod>(exec), name, list)
118     {
119         ASSERT(inherits(&s_info));
120     }
121 
createStructure(JSGlobalData & globalData,JSValue prototype)122     static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
123     {
124         return Structure::create(globalData, prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
125     }
126 
127     static const ClassInfo s_info;
128 };
129 
130 const ClassInfo CRuntimeMethod::s_info = { "CRuntimeMethod", &RuntimeMethod::s_info, 0, 0 };
131 
getMethod(ExecState * exec,const Identifier & propertyName)132 JSValue CInstance::getMethod(ExecState* exec, const Identifier& propertyName)
133 {
134     MethodList methodList = getClass()->methodsNamed(propertyName, this);
135     return new (exec) CRuntimeMethod(exec, exec->lexicalGlobalObject(), propertyName, methodList);
136 }
137 
invokeMethod(ExecState * exec,RuntimeMethod * runtimeMethod)138 JSValue CInstance::invokeMethod(ExecState* exec, RuntimeMethod* runtimeMethod)
139 {
140     if (!asObject(runtimeMethod)->inherits(&CRuntimeMethod::s_info))
141         return throwError(exec, createTypeError(exec, "Attempt to invoke non-plug-in method on plug-in object."));
142 
143     const MethodList& methodList = *runtimeMethod->methods();
144 
145     // Overloading methods are not allowed by NPObjects.  Should only be one
146     // name match for a particular method.
147     ASSERT(methodList.size() == 1);
148 
149     CMethod* method = static_cast<CMethod*>(methodList[0]);
150 
151     NPIdentifier ident = method->identifier();
152     if (!_object->_class->hasMethod(_object, ident))
153         return jsUndefined();
154 
155     unsigned count = exec->argumentCount();
156     Vector<NPVariant, 8> cArgs(count);
157 
158     unsigned i;
159     for (i = 0; i < count; i++)
160         convertValueToNPVariant(exec, exec->argument(i), &cArgs[i]);
161 
162     // Invoke the 'C' method.
163     bool retval = true;
164     NPVariant resultVariant;
165     VOID_TO_NPVARIANT(resultVariant);
166 
167     {
168         JSLock::DropAllLocks dropAllLocks(SilenceAssertionsOnly);
169         ASSERT(globalExceptionString().isNull());
170         retval = _object->_class->invoke(_object, ident, cArgs.data(), count, &resultVariant);
171         moveGlobalExceptionToExecState(exec);
172     }
173 
174     if (!retval)
175         throwError(exec, createError(exec, "Error calling method on NPObject."));
176 
177     for (i = 0; i < count; i++)
178         _NPN_ReleaseVariantValue(&cArgs[i]);
179 
180     JSValue resultValue = convertNPVariantToValue(exec, &resultVariant, m_rootObject.get());
181     _NPN_ReleaseVariantValue(&resultVariant);
182     return resultValue;
183 }
184 
185 
invokeDefaultMethod(ExecState * exec)186 JSValue CInstance::invokeDefaultMethod(ExecState* exec)
187 {
188     if (!_object->_class->invokeDefault)
189         return jsUndefined();
190 
191     unsigned count = exec->argumentCount();
192     Vector<NPVariant, 8> cArgs(count);
193 
194     unsigned i;
195     for (i = 0; i < count; i++)
196         convertValueToNPVariant(exec, exec->argument(i), &cArgs[i]);
197 
198     // Invoke the 'C' method.
199     bool retval = true;
200     NPVariant resultVariant;
201     VOID_TO_NPVARIANT(resultVariant);
202     {
203         JSLock::DropAllLocks dropAllLocks(SilenceAssertionsOnly);
204         ASSERT(globalExceptionString().isNull());
205         retval = _object->_class->invokeDefault(_object, cArgs.data(), count, &resultVariant);
206         moveGlobalExceptionToExecState(exec);
207     }
208 
209     if (!retval)
210         throwError(exec, createError(exec, "Error calling method on NPObject."));
211 
212     for (i = 0; i < count; i++)
213         _NPN_ReleaseVariantValue(&cArgs[i]);
214 
215     JSValue resultValue = convertNPVariantToValue(exec, &resultVariant, m_rootObject.get());
216     _NPN_ReleaseVariantValue(&resultVariant);
217     return resultValue;
218 }
219 
supportsConstruct() const220 bool CInstance::supportsConstruct() const
221 {
222     return _object->_class->construct;
223 }
224 
invokeConstruct(ExecState * exec,const ArgList & args)225 JSValue CInstance::invokeConstruct(ExecState* exec, const ArgList& args)
226 {
227     if (!_object->_class->construct)
228         return jsUndefined();
229 
230     unsigned count = args.size();
231     Vector<NPVariant, 8> cArgs(count);
232 
233     unsigned i;
234     for (i = 0; i < count; i++)
235         convertValueToNPVariant(exec, args.at(i), &cArgs[i]);
236 
237     // Invoke the 'C' method.
238     bool retval = true;
239     NPVariant resultVariant;
240     VOID_TO_NPVARIANT(resultVariant);
241     {
242         JSLock::DropAllLocks dropAllLocks(SilenceAssertionsOnly);
243         ASSERT(globalExceptionString().isNull());
244         retval = _object->_class->construct(_object, cArgs.data(), count, &resultVariant);
245         moveGlobalExceptionToExecState(exec);
246     }
247 
248     if (!retval)
249         throwError(exec, createError(exec, "Error calling method on NPObject."));
250 
251     for (i = 0; i < count; i++)
252         _NPN_ReleaseVariantValue(&cArgs[i]);
253 
254     JSValue resultValue = convertNPVariantToValue(exec, &resultVariant, m_rootObject.get());
255     _NPN_ReleaseVariantValue(&resultVariant);
256     return resultValue;
257 }
258 
defaultValue(ExecState * exec,PreferredPrimitiveType hint) const259 JSValue CInstance::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
260 {
261     if (hint == PreferString)
262         return stringValue(exec);
263     if (hint == PreferNumber)
264         return numberValue(exec);
265     return valueOf(exec);
266 }
267 
stringValue(ExecState * exec) const268 JSValue CInstance::stringValue(ExecState* exec) const
269 {
270     char buf[1024];
271     snprintf(buf, sizeof(buf), "NPObject %p, NPClass %p", _object, _object->_class);
272     return jsString(exec, buf);
273 }
274 
numberValue(ExecState *) const275 JSValue CInstance::numberValue(ExecState*) const
276 {
277     // FIXME: Implement something sensible.
278     return jsNumber(0);
279 }
280 
booleanValue() const281 JSValue CInstance::booleanValue() const
282 {
283     // FIXME: Implement something sensible.
284     return jsBoolean(false);
285 }
286 
valueOf(ExecState * exec) const287 JSValue CInstance::valueOf(ExecState* exec) const
288 {
289     return stringValue(exec);
290 }
291 
getPropertyNames(ExecState * exec,PropertyNameArray & nameArray)292 void CInstance::getPropertyNames(ExecState* exec, PropertyNameArray& nameArray)
293 {
294     if (!NP_CLASS_STRUCT_VERSION_HAS_ENUM(_object->_class) || !_object->_class->enumerate)
295         return;
296 
297     uint32_t count;
298     NPIdentifier* identifiers;
299 
300     {
301         JSLock::DropAllLocks dropAllLocks(SilenceAssertionsOnly);
302         ASSERT(globalExceptionString().isNull());
303         bool ok = _object->_class->enumerate(_object, &identifiers, &count);
304         moveGlobalExceptionToExecState(exec);
305         if (!ok)
306             return;
307     }
308 
309     for (uint32_t i = 0; i < count; i++) {
310         IdentifierRep* identifier = static_cast<IdentifierRep*>(identifiers[i]);
311 
312         if (identifier->isString())
313             nameArray.add(identifierFromNPIdentifier(exec, identifier->string()));
314         else
315             nameArray.add(Identifier::from(exec, identifier->number()));
316     }
317 
318     // FIXME: This should really call NPN_MemFree but that's in WebKit
319     free(identifiers);
320 }
321 
322 }
323 }
324 
325 #endif // ENABLE(NETSCAPE_PLUGIN_API)
326