code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/bridge/runtime_object.cpp

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  25
  26 #include "config.h"
  27 #include "runtime_object.h"
  28
  29 #include "JSDOMBinding.h"
  30 #include "runtime_method.h"
  31 #include <runtime/Error.h>
  32
  33 using namespace WebCore;
  34
  35 namespace JSC {
  36 namespace Bindings {
  37
  38 const ClassInfo RuntimeObject::s_info = { "RuntimeObject", &JSNonFinalObject::s_info, 0, 0 };
  39
  40 RuntimeObject::RuntimeObject(ExecState*, JSGlobalObject* globalObject, Structure* structure, PassRefPtr<Instance> instance)
  41     : JSNonFinalObject(globalObject->globalData(), structure)
  42     , m_instance(instance)
  43 {
  44 }
  45
  46 void RuntimeObject::finishCreation(JSGlobalObject* globalObject)
  47 {
  48     Base::finishCreation(globalObject->globalData());
  49     ASSERT(inherits(&s_info));
  50 }
  51
  52 RuntimeObject::~RuntimeObject()
  53 {
  54     ASSERT(!m_instance);
  55 }
  56
  57 void RuntimeObject::invalidate()
  58 {
  59     ASSERT(m_instance);
  60     if (m_instance)
  61         m_instance->willInvalidateRuntimeObject();
  62     m_instance = 0;
  63 }
  64
  65 JSValue RuntimeObject::fallbackObjectGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
  66 {
  67     RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
  68     RefPtr<Instance> instance = thisObj->m_instance;
  69
  70     if (!instance)
  71         return throwInvalidAccessError(exec);
  72
  73     instance->begin();
  74
  75     Class *aClass = instance->getClass();
  76     JSValue result = aClass->fallbackObject(exec, instance.get(), propertyName);
  77
  78     instance->end();
  79
  80     return result;
  81 }
  82
  83 JSValue RuntimeObject::fieldGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
  84 {
  85     RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
  86     RefPtr<Instance> instance = thisObj->m_instance;
  87
  88     if (!instance)
  89         return throwInvalidAccessError(exec);
  90
  91     instance->begin();
  92
  93     Class *aClass = instance->getClass();
  94     Field* aField = aClass->fieldNamed(propertyName, instance.get());
  95     JSValue result = aField->valueFromInstance(exec, instance.get());
  96
  97     instance->end();
  98
  99     return result;
 100 }
 101
 102 JSValue RuntimeObject::methodGetter(ExecState* exec, JSValue slotBase, const Identifier& propertyName)
 103 {
 104     RuntimeObject* thisObj = static_cast<RuntimeObject*>(asObject(slotBase));
 105     RefPtr<Instance> instance = thisObj->m_instance;
 106
 107     if (!instance)
 108         return throwInvalidAccessError(exec);
 109
 110     instance->begin();
 111
 112     JSValue method = instance->getMethod(exec, propertyName);
 113
 114     instance->end();
 115
 116     return method;
 117 }
 118
 119 bool RuntimeObject::getOwnPropertySlot(ExecState *exec, const Identifier& propertyName, PropertySlot& slot)
 120 {
 121     if (!m_instance) {
 122         throwInvalidAccessError(exec);
 123         return false;
 124     }
 125
 126     RefPtr<Instance> instance = m_instance;
 127
 128     instance->begin();
 129
 130     Class *aClass = instance->getClass();
 131
 132     if (aClass) {
 133         // See if the instance has a field with the specified name.
 134         Field *aField = aClass->fieldNamed(propertyName, instance.get());
 135         if (aField) {
 136             slot.setCustom(this, fieldGetter);
 137             instance->end();
 138             return true;
 139         } else {
 140             // Now check if a method with specified name exists, if so return a function object for
 141             // that method.
 142             MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
 143             if (methodList.size() > 0) {
 144                 slot.setCustom(this, methodGetter);
 145
 146                 instance->end();
 147                 return true;
 148             }
 149         }
 150
 151         // Try a fallback object.
 152         if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
 153             slot.setCustom(this, fallbackObjectGetter);
 154             instance->end();
 155             return true;
 156         }
 157     }
 158
 159     instance->end();
 160
 161     return instance->getOwnPropertySlot(this, exec, propertyName, slot);
 162 }
 163
 164 bool RuntimeObject::getOwnPropertyDescriptor(ExecState *exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
 165 {
 166     if (!m_instance) {
 167         throwInvalidAccessError(exec);
 168         return false;
 169     }
 170
 171     RefPtr<Instance> instance = m_instance;
 172     instance->begin();
 173
 174     Class *aClass = instance->getClass();
 175
 176     if (aClass) {
 177         // See if the instance has a field with the specified name.
 178         Field *aField = aClass->fieldNamed(propertyName, instance.get());
 179         if (aField) {
 180             PropertySlot slot;
 181             slot.setCustom(this, fieldGetter);
 182             instance->end();
 183             descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete);
 184             return true;
 185         } else {
 186             // Now check if a method with specified name exists, if so return a function object for
 187             // that method.
 188             MethodList methodList = aClass->methodsNamed(propertyName, instance.get());
 189             if (methodList.size() > 0) {
 190                 PropertySlot slot;
 191                 slot.setCustom(this, methodGetter);
 192                 instance->end();
 193                 descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | ReadOnly);
 194                 return true;
 195             }
 196         }
 197
 198         // Try a fallback object.
 199         if (!aClass->fallbackObject(exec, instance.get(), propertyName).isUndefined()) {
 200             PropertySlot slot;
 201             slot.setCustom(this, fallbackObjectGetter);
 202             instance->end();
 203             descriptor.setDescriptor(slot.getValue(exec, propertyName), DontDelete | ReadOnly | DontEnum);
 204             return true;
 205         }
 206     }
 207
 208     instance->end();
 209
 210     return instance->getOwnPropertyDescriptor(this, exec, propertyName, descriptor);
 211 }
 212
 213 void RuntimeObject::put(ExecState* exec, const Identifier& propertyName, JSValue value, PutPropertySlot& slot)
 214 {
 215     if (!m_instance) {
 216         throwInvalidAccessError(exec);
 217         return;
 218     }
 219
 220     RefPtr<Instance> instance = m_instance;
 221     instance->begin();
 222
 223     // Set the value of the property.
 224     Field *aField = instance->getClass()->fieldNamed(propertyName, instance.get());
 225     if (aField)
 226         aField->setValueToInstance(exec, instance.get(), value);
 227     else if (!instance->setValueOfUndefinedField(exec, propertyName, value))
 228         instance->put(this, exec, propertyName, value, slot);
 229
 230     instance->end();
 231 }
 232
 233 bool RuntimeObject::deleteProperty(ExecState*, const Identifier&)
 234 {
 235     // Can never remove a property of a RuntimeObject.
 236     return false;
 237 }
 238
 239 JSValue RuntimeObject::defaultValue(ExecState* exec, PreferredPrimitiveType hint) const
 240 {
 241     if (!m_instance)
 242         return throwInvalidAccessError(exec);
 243
 244     RefPtr<Instance> instance = m_instance;
 245
 246     instance->begin();
 247     JSValue result = instance->defaultValue(exec, hint);
 248     instance->end();
 249     return result;
 250 }
 251
 252 static EncodedJSValue JSC_HOST_CALL callRuntimeObject(ExecState* exec)
 253 {
 254     ASSERT(exec->callee()->inherits(&RuntimeObject::s_info));
 255     RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->callee())->getInternalInstance());
 256     instance->begin();
 257     JSValue result = instance->invokeDefaultMethod(exec);
 258     instance->end();
 259     return JSValue::encode(result);
 260 }
 261
 262 CallType RuntimeObject::getCallData(CallData& callData)
 263 {
 264     if (!m_instance)
 265         return CallTypeNone;
 266
 267     RefPtr<Instance> instance = m_instance;
 268     if (!instance->supportsInvokeDefaultMethod())
 269         return CallTypeNone;
 270
 271     callData.native.function = callRuntimeObject;
 272     return CallTypeHost;
 273 }
 274
 275 static EncodedJSValue JSC_HOST_CALL callRuntimeConstructor(ExecState* exec)
 276 {
 277     JSObject* constructor = exec->callee();
 278     ASSERT(constructor->inherits(&RuntimeObject::s_info));
 279     RefPtr<Instance> instance(static_cast<RuntimeObject*>(exec->callee())->getInternalInstance());
 280     instance->begin();
 281     ArgList args(exec);
 282     JSValue result = instance->invokeConstruct(exec, args);
 283     instance->end();
 284
 285     ASSERT(result);
 286     return JSValue::encode(result.isObject() ? static_cast<JSObject*>(result.asCell()) : constructor);
 287 }
 288
 289 ConstructType RuntimeObject::getConstructData(ConstructData& constructData)
 290 {
 291     if (!m_instance)
 292         return ConstructTypeNone;
 293
 294     RefPtr<Instance> instance = m_instance;
 295     if (!instance->supportsConstruct())
 296         return ConstructTypeNone;
 297
 298     constructData.native.function = callRuntimeConstructor;
 299     return ConstructTypeHost;
 300 }
 301
 302 void RuntimeObject::getOwnPropertyNames(ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode)
 303 {
 304     if (!m_instance) {
 305         throwInvalidAccessError(exec);
 306         return;
 307     }
 308
 309     RefPtr<Instance> instance = m_instance;
 310
 311     instance->begin();
 312     instance->getPropertyNames(exec, propertyNames);
 313     instance->end();
 314 }
 315
 316 JSObject* RuntimeObject::throwInvalidAccessError(ExecState* exec)
 317 {
 318     return throwError(exec, createReferenceError(exec, "Trying to access object from destroyed plug-in."));
 319 }
 320
 321 }
 322 }