bindings/NP_jsobject.cpp

   1 /*
   2  * Copyright (C) 2004, 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_API)
  29
  30 #include "NP_jsobject.h"
  31
  32 #include "JSGlobalObject.h"
  33 #include "PropertyNameArray.h"
  34 #include "c_utility.h"
  35 #include "interpreter.h"
  36 #include "npruntime_impl.h"
  37 #include "npruntime_priv.h"
  38 #include "object.h"
  39 #include "runtime_root.h"
  40
  41 using namespace KJS;
  42 using namespace KJS::Bindings;
  43
  44 static void getListFromVariantArgs(ExecState* exec, const NPVariant* args, unsigned argCount, RootObject* rootObject, List& aList)
  45 {
  46     for (unsigned i = 0; i < argCount; i++)
  47         aList.append(convertNPVariantToValue(exec, &args[i], rootObject));
  48 }
  49
  50 static NPObject* jsAllocate(NPP, NPClass*)
  51 {
  52     return (NPObject*)malloc(sizeof(JavaScriptObject));
  53 }
  54
  55 static void jsDeallocate(NPObject* npObj)
  56 {
  57     JavaScriptObject* obj = (JavaScriptObject*)npObj;
  58
  59     if (obj->rootObject && obj->rootObject->isValid())
  60         obj->rootObject->gcUnprotect(obj->imp);
  61
  62     if (obj->rootObject)
  63         obj->rootObject->deref();
  64
  65     free(obj);
  66 }
  67
  68 static NPClass javascriptClass = { 1, jsAllocate, jsDeallocate, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
  69 static NPClass noScriptClass = { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
  70
  71 NPClass* NPScriptObjectClass = &javascriptClass;
  72 static NPClass* NPNoScriptObjectClass = &noScriptClass;
  73
  74 NPObject* _NPN_CreateScriptObject(NPP npp, JSObject* imp, PassRefPtr<RootObject> rootObject)
  75 {
  76     JavaScriptObject* obj = (JavaScriptObject*)_NPN_CreateObject(npp, NPScriptObjectClass);
  77
  78     obj->rootObject = rootObject.releaseRef();
  79
  80     if (obj->rootObject)
  81         obj->rootObject->gcProtect(imp);
  82     obj->imp = imp;
  83
  84     return (NPObject*)obj;
  85 }
  86
  87 NPObject *_NPN_CreateNoScriptObject(void)
  88 {
  89     return _NPN_CreateObject(0, NPNoScriptObjectClass);
  90 }
  91
  92 bool _NPN_InvokeDefault(NPP, NPObject* o, const NPVariant* args, uint32_t argCount, NPVariant* result)
  93 {
  94     if (o->_class == NPScriptObjectClass) {
  95         JavaScriptObject* obj = (JavaScriptObject*)o;
  96
  97         VOID_TO_NPVARIANT(*result);
  98
  99         // Lookup the function object.
 100         RootObject* rootObject = obj->rootObject;
 101         if (!rootObject || !rootObject->isValid())
 102             return false;
 103
 104         ExecState* exec = rootObject->globalObject()->globalExec();
 105         JSLock lock;
 106
 107         // Call the function object.
 108         JSObject *funcImp = static_cast<JSObject*>(obj->imp);
 109         if (!funcImp->implementsCall())
 110             return false;
 111
 112         List argList;
 113         getListFromVariantArgs(exec, args, argCount, rootObject, argList);
 114         rootObject->globalObject()->startTimeoutCheck();
 115         JSValue *resultV = funcImp->call (exec, funcImp, argList);
 116         rootObject->globalObject()->stopTimeoutCheck();
 117
 118         // Convert and return the result of the function call.
 119         convertValueToNPVariant(exec, resultV, result);
 120         return true;
 121     }
 122
 123     if (o->_class->invokeDefault)
 124         return o->_class->invokeDefault(o, args, argCount, result);
 125     VOID_TO_NPVARIANT(*result);
 126     return true;
 127 }
 128
 129 bool _NPN_Invoke(NPP npp, NPObject* o, NPIdentifier methodName, const NPVariant* args, uint32_t argCount, NPVariant* result)
 130 {
 131     if (o->_class == NPScriptObjectClass) {
 132         JavaScriptObject* obj = (JavaScriptObject*)o;
 133
 134         PrivateIdentifier* i = (PrivateIdentifier*)methodName;
 135         if (!i->isString)
 136             return false;
 137
 138         // Special case the "eval" method.
 139         if (methodName == _NPN_GetStringIdentifier("eval")) {
 140             if (argCount != 1)
 141                 return false;
 142             if (args[0].type != NPVariantType_String)
 143                 return false;
 144             return _NPN_Evaluate(npp, o, (NPString *)&args[0].value.stringValue, result);
 145         }
 146
 147         // Lookup the function object.
 148         RootObject* rootObject = obj->rootObject;
 149         if (!rootObject || !rootObject->isValid())
 150             return false;
 151
 152         ExecState* exec = rootObject->globalObject()->globalExec();
 153         JSLock lock;
 154         JSValue* func = obj->imp->get(exec, identifierFromNPIdentifier(i->value.string));
 155         if (func->isNull()) {
 156             NULL_TO_NPVARIANT(*result);
 157             return false;
 158         }
 159         if (func->isUndefined()) {
 160             VOID_TO_NPVARIANT(*result);
 161             return false;
 162         }
 163         // Call the function object.
 164         JSObject *funcImp = static_cast<JSObject*>(func);
 165         JSObject *thisObj = const_cast<JSObject*>(obj->imp);
 166         List argList;
 167         getListFromVariantArgs(exec, args, argCount, rootObject, argList);
 168         rootObject->globalObject()->startTimeoutCheck();
 169         JSValue *resultV = funcImp->call (exec, thisObj, argList);
 170         rootObject->globalObject()->stopTimeoutCheck();
 171
 172         // Convert and return the result of the function call.
 173         convertValueToNPVariant(exec, resultV, result);
 174         return true;
 175     }
 176
 177     if (o->_class->invoke)
 178         return o->_class->invoke(o, methodName, args, argCount, result);
 179
 180     VOID_TO_NPVARIANT(*result);
 181     return true;
 182 }
 183
 184 bool _NPN_Evaluate(NPP, NPObject* o, NPString* s, NPVariant* variant)
 185 {
 186     if (o->_class == NPScriptObjectClass) {
 187         JavaScriptObject* obj = (JavaScriptObject*)o;
 188
 189         RootObject* rootObject = obj->rootObject;
 190         if (!rootObject || !rootObject->isValid())
 191             return false;
 192
 193         ExecState* exec = rootObject->globalObject()->globalExec();
 194
 195         JSLock lock;
 196         NPUTF16* scriptString;
 197         unsigned int UTF16Length;
 198         convertNPStringToUTF16(s, &scriptString, &UTF16Length); // requires free() of returned memory
 199         rootObject->globalObject()->startTimeoutCheck();
 200         Completion completion = Interpreter::evaluate(rootObject->globalObject()->globalExec(), UString(), 0, UString(reinterpret_cast<const UChar*>(scriptString), UTF16Length));
 201         rootObject->globalObject()->stopTimeoutCheck();
 202         ComplType type = completion.complType();
 203
 204         JSValue* result;
 205         if (type == Normal) {
 206             result = completion.value();
 207             if (!result)
 208                 result = jsUndefined();
 209         } else
 210             result = jsUndefined();
 211
 212         free(scriptString);
 213
 214         convertValueToNPVariant(exec, result, variant);
 215
 216         return true;
 217     }
 218
 219     VOID_TO_NPVARIANT(*variant);
 220     return false;
 221 }
 222
 223 bool _NPN_GetProperty(NPP, NPObject* o, NPIdentifier propertyName, NPVariant* variant)
 224 {
 225     if (o->_class == NPScriptObjectClass) {
 226         JavaScriptObject* obj = (JavaScriptObject*)o;
 227
 228         RootObject* rootObject = obj->rootObject;
 229         if (!rootObject || !rootObject->isValid())
 230             return false;
 231
 232         ExecState* exec = rootObject->globalObject()->globalExec();
 233         PrivateIdentifier* i = (PrivateIdentifier*)propertyName;
 234
 235         JSLock lock;
 236         JSValue *result;
 237         if (i->isString)
 238             result = obj->imp->get(exec, identifierFromNPIdentifier(i->value.string));
 239         else
 240             result = obj->imp->get(exec, i->value.number);
 241
 242         convertValueToNPVariant(exec, result, variant);
 243         return true;
 244     }
 245
 246     if (o->_class->hasProperty && o->_class->getProperty) {
 247         if (o->_class->hasProperty(o, propertyName))
 248             return o->_class->getProperty(o, propertyName, variant);
 249         return false;
 250     }
 251
 252     VOID_TO_NPVARIANT(*variant);
 253     return false;
 254 }
 255
 256 bool _NPN_SetProperty(NPP, NPObject* o, NPIdentifier propertyName, const NPVariant* variant)
 257 {
 258     if (o->_class == NPScriptObjectClass) {
 259         JavaScriptObject* obj = (JavaScriptObject*)o;
 260
 261         RootObject* rootObject = obj->rootObject;
 262         if (!rootObject || !rootObject->isValid())
 263             return false;
 264
 265         ExecState* exec = rootObject->globalObject()->globalExec();
 266         JSLock lock;
 267         PrivateIdentifier* i = (PrivateIdentifier*)propertyName;
 268         if (i->isString)
 269             obj->imp->put(exec, identifierFromNPIdentifier(i->value.string), convertNPVariantToValue(exec, variant, rootObject));
 270         else
 271             obj->imp->put(exec, i->value.number, convertNPVariantToValue(exec, variant, rootObject));
 272         return true;
 273     }
 274
 275     if (o->_class->setProperty)
 276         return o->_class->setProperty(o, propertyName, variant);
 277
 278     return false;
 279 }
 280
 281 bool _NPN_RemoveProperty(NPP, NPObject* o, NPIdentifier propertyName)
 282 {
 283     if (o->_class == NPScriptObjectClass) {
 284         JavaScriptObject* obj = (JavaScriptObject*)o;
 285
 286         RootObject* rootObject = obj->rootObject;
 287         if (!rootObject || !rootObject->isValid())
 288             return false;
 289
 290         ExecState* exec = rootObject->globalObject()->globalExec();
 291         PrivateIdentifier* i = (PrivateIdentifier*)propertyName;
 292         if (i->isString) {
 293             if (!obj->imp->hasProperty(exec, identifierFromNPIdentifier(i->value.string)))
 294                 return false;
 295         } else {
 296             if (!obj->imp->hasProperty(exec, i->value.number))
 297                 return false;
 298         }
 299
 300         JSLock lock;
 301         if (i->isString)
 302             obj->imp->deleteProperty(exec, identifierFromNPIdentifier(i->value.string));
 303         else
 304             obj->imp->deleteProperty(exec, i->value.number);
 305
 306         return true;
 307     }
 308     return false;
 309 }
 310
 311 bool _NPN_HasProperty(NPP, NPObject* o, NPIdentifier propertyName)
 312 {
 313     if (o->_class == NPScriptObjectClass) {
 314         JavaScriptObject* obj = (JavaScriptObject*)o;
 315
 316         RootObject* rootObject = obj->rootObject;
 317         if (!rootObject || !rootObject->isValid())
 318             return false;
 319
 320         ExecState* exec = rootObject->globalObject()->globalExec();
 321         PrivateIdentifier* i = (PrivateIdentifier*)propertyName;
 322         JSLock lock;
 323         if (i->isString)
 324             return obj->imp->hasProperty(exec, identifierFromNPIdentifier(i->value.string));
 325         return obj->imp->hasProperty(exec, i->value.number);
 326     }
 327
 328     if (o->_class->hasProperty)
 329         return o->_class->hasProperty(o, propertyName);
 330
 331     return false;
 332 }
 333
 334 bool _NPN_HasMethod(NPP, NPObject* o, NPIdentifier methodName)
 335 {
 336     if (o->_class == NPScriptObjectClass) {
 337         JavaScriptObject* obj = (JavaScriptObject*)o;
 338
 339         PrivateIdentifier* i = (PrivateIdentifier*)methodName;
 340         if (!i->isString)
 341             return false;
 342
 343         RootObject* rootObject = obj->rootObject;
 344         if (!rootObject || !rootObject->isValid())
 345             return false;
 346
 347         ExecState* exec = rootObject->globalObject()->globalExec();
 348         JSLock lock;
 349         JSValue* func = obj->imp->get(exec, identifierFromNPIdentifier(i->value.string));
 350         return !func->isUndefined();
 351     }
 352
 353     if (o->_class->hasMethod)
 354         return o->_class->hasMethod(o, methodName);
 355
 356     return false;
 357 }
 358
 359 void _NPN_SetException(NPObject* o, const NPUTF8* message)
 360 {
 361     if (o->_class == NPScriptObjectClass) {
 362         JavaScriptObject* obj = (JavaScriptObject*)o;
 363         RootObject* rootObject = obj->rootObject;
 364         if (!rootObject || !rootObject->isValid())
 365             return;
 366
 367         ExecState* exec = rootObject->globalObject()->globalExec();
 368         JSLock lock;
 369         throwError(exec, GeneralError, message);
 370     }
 371 }
 372
 373 bool _NPN_Enumerate(NPP, NPObject *o, NPIdentifier **identifier, uint32_t *count)
 374 {
 375     if (o->_class == NPScriptObjectClass) {
 376         JavaScriptObject* obj = (JavaScriptObject*)o;
 377
 378         RootObject* rootObject = obj->rootObject;
 379         if (!rootObject || !rootObject->isValid())
 380             return false;
 381
 382         ExecState* exec = rootObject->globalObject()->globalExec();
 383         JSLock lock;
 384         PropertyNameArray propertyNames;
 385
 386         obj->imp->getPropertyNames(exec, propertyNames);
 387         unsigned size = static_cast<unsigned>(propertyNames.size());
 388         // FIXME: This should really call NPN_MemAlloc but that's in WebKit
 389         NPIdentifier *identifiers = static_cast<NPIdentifier*>(malloc(sizeof(NPIdentifier) * size));
 390
 391         for (unsigned i = 0; i < size; i++)
 392             identifiers[i] = _NPN_GetStringIdentifier(propertyNames[i].ustring().UTF8String().c_str());
 393
 394         *identifier = identifiers;
 395         *count = size;
 396
 397         return true;
 398     }
 399
 400     if (NP_CLASS_STRUCT_VERSION_HAS_ENUM(o->_class) && o->_class->enumerate)
 401         return o->_class->enumerate(o, identifier, count);
 402
 403     return false;
 404 }
 405
 406 #endif // ENABLE(NETSCAPE_API)