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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "bindings/v8/V8PerContextData.h"
#include "bindings/v8/V8Binding.h"
#include "bindings/v8/V8ObjectConstructor.h"
#include "wtf/StringExtras.h"
namespace WebCore {
template<typename Map>
static void disposeMapWithUnsafePersistentValues(Map* map)
{
typename Map::iterator it = map->begin();
for (; it != map->end(); ++it)
it->value.dispose();
map->clear();
}
void V8PerContextData::dispose()
{
v8::HandleScope handleScope(m_isolate);
v8::Local<v8::Context>::New(m_isolate, m_context)->SetAlignedPointerInEmbedderData(v8ContextPerContextDataIndex, 0);
disposeMapWithUnsafePersistentValues(&m_wrapperBoilerplates);
disposeMapWithUnsafePersistentValues(&m_constructorMap);
m_customElementBindings.clear();
m_context.Dispose();
}
#define V8_STORE_PRIMORDIAL(name, Name) \
{ \
ASSERT(m_##name##Prototype.isEmpty()); \
v8::Handle<v8::String> symbol = v8::String::NewSymbol(#Name); \
if (symbol.IsEmpty()) \
return false; \
v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(v8::Local<v8::Context>::New(m_isolate, m_context)->Global()->Get(symbol)); \
if (object.IsEmpty()) \
return false; \
v8::Handle<v8::Value> prototypeValue = object->Get(prototypeString); \
if (prototypeValue.IsEmpty()) \
return false; \
m_##name##Prototype.set(m_isolate, prototypeValue); \
}
bool V8PerContextData::init()
{
v8::Handle<v8::Context> context = v8::Local<v8::Context>::New(m_isolate, m_context);
context->SetAlignedPointerInEmbedderData(v8ContextPerContextDataIndex, this);
v8::Handle<v8::String> prototypeString = v8::String::NewSymbol("prototype");
if (prototypeString.IsEmpty())
return false;
V8_STORE_PRIMORDIAL(error, Error);
return true;
}
#undef V8_STORE_PRIMORDIAL
v8::Local<v8::Object> V8PerContextData::createWrapperFromCacheSlowCase(const WrapperTypeInfo* type)
{
ASSERT(!m_errorPrototype.isEmpty());
v8::Context::Scope scope(v8::Local<v8::Context>::New(m_isolate, m_context));
v8::Local<v8::Function> function = constructorForType(type);
v8::Local<v8::Object> instance = V8ObjectConstructor::newInstance(function);
if (!instance.IsEmpty()) {
m_wrapperBoilerplates.set(type, UnsafePersistent<v8::Object>(m_isolate, instance));
return instance->Clone();
}
return v8::Local<v8::Object>();
}
v8::Local<v8::Function> V8PerContextData::constructorForTypeSlowCase(const WrapperTypeInfo* type)
{
ASSERT(!m_errorPrototype.isEmpty());
v8::Context::Scope scope(v8::Local<v8::Context>::New(m_isolate, m_context));
v8::Handle<v8::FunctionTemplate> functionTemplate = type->getTemplate(m_isolate, worldType(m_isolate));
// Getting the function might fail if we're running out of stack or memory.
v8::TryCatch tryCatch;
v8::Local<v8::Function> function = functionTemplate->GetFunction();
if (function.IsEmpty())
return v8::Local<v8::Function>();
if (type->parentClass) {
v8::Local<v8::Object> proto = constructorForType(type->parentClass);
if (proto.IsEmpty())
return v8::Local<v8::Function>();
function->SetPrototype(proto);
}
v8::Local<v8::Value> prototypeValue = function->Get(v8::String::NewSymbol("prototype"));
if (!prototypeValue.IsEmpty() && prototypeValue->IsObject()) {
v8::Local<v8::Object> prototypeObject = v8::Local<v8::Object>::Cast(prototypeValue);
if (prototypeObject->InternalFieldCount() == v8PrototypeInternalFieldcount
&& type->wrapperTypePrototype == WrapperTypeObjectPrototype)
prototypeObject->SetAlignedPointerInInternalField(v8PrototypeTypeIndex, const_cast<WrapperTypeInfo*>(type));
type->installPerContextEnabledPrototypeProperties(prototypeObject, m_isolate);
if (type->wrapperTypePrototype == WrapperTypeErrorPrototype)
prototypeObject->SetPrototype(m_errorPrototype.newLocal(m_isolate));
}
m_constructorMap.set(type, UnsafePersistent<v8::Function>(m_isolate, function));
return function;
}
v8::Local<v8::Object> V8PerContextData::prototypeForType(const WrapperTypeInfo* type)
{
v8::Local<v8::Object> constructor = constructorForType(type);
if (constructor.IsEmpty())
return v8::Local<v8::Object>();
return constructor->Get(v8String("prototype", m_isolate)).As<v8::Object>();
}
void V8PerContextData::addCustomElementBinding(CustomElementDefinition* definition, PassOwnPtr<CustomElementBinding> binding)
{
ASSERT(!m_customElementBindings->contains(definition));
m_customElementBindings->add(definition, binding);
}
void V8PerContextData::clearCustomElementBinding(CustomElementDefinition* definition)
{
CustomElementBindingMap::iterator it = m_customElementBindings->find(definition);
ASSERT(it != m_customElementBindings->end());
m_customElementBindings->remove(it);
}
CustomElementBinding* V8PerContextData::customElementBinding(CustomElementDefinition* definition)
{
CustomElementBindingMap::const_iterator it = m_customElementBindings->find(definition);
ASSERT(it != m_customElementBindings->end());
return it->value.get();
}
static v8::Handle<v8::Value> createDebugData(const char* worldName, int debugId, v8::Isolate* isolate)
{
char buffer[32];
unsigned wanted;
if (debugId == -1)
wanted = snprintf(buffer, sizeof(buffer), "%s", worldName);
else
wanted = snprintf(buffer, sizeof(buffer), "%s,%d", worldName, debugId);
if (wanted < sizeof(buffer))
return v8::String::NewSymbol(buffer);
return v8::Undefined(isolate);
}
static v8::Handle<v8::Value> debugData(v8::Handle<v8::Context> context)
{
v8::Context::Scope contextScope(context);
return context->GetEmbedderData(v8ContextDebugIdIndex);
}
static void setDebugData(v8::Handle<v8::Context> context, v8::Handle<v8::Value> value)
{
v8::Context::Scope contextScope(context);
context->SetEmbedderData(v8ContextDebugIdIndex, value);
}
bool V8PerContextDebugData::setContextDebugData(v8::Handle<v8::Context> context, const char* worldName, int debugId)
{
if (!debugData(context)->IsUndefined())
return false;
v8::HandleScope scope(context->GetIsolate());
v8::Handle<v8::Value> debugData = createDebugData(worldName, debugId, context->GetIsolate());
setDebugData(context, debugData);
return true;
}
int V8PerContextDebugData::contextDebugId(v8::Handle<v8::Context> context)
{
v8::HandleScope scope(context->GetIsolate());
v8::Handle<v8::Value> data = debugData(context);
if (!data->IsString())
return -1;
v8::String::AsciiValue ascii(data);
char* comma = strnstr(*ascii, ",", ascii.length());
if (!comma)
return -1;
return atoi(comma + 1);
}
} // namespace WebCore