#ifndef ScriptState_h
#define ScriptState_h
#include "DOMWrapperWorld.h"
#include <v8.h>
#include <wtf/Noncopyable.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class DOMWrapperWorld;
class Frame;
class Node;
class Page;
class WorkerContext;
class ScriptState {
WTF_MAKE_NONCOPYABLE(ScriptState);
public:
bool hadException() { return !m_exception.IsEmpty(); }
void setException(v8::Local<v8::Value> exception)
{
m_exception = exception;
}
v8::Local<v8::Value> exception() { return m_exception; }
v8::Local<v8::Context> context() const
{
return v8::Local<v8::Context>::New(m_context);
}
static ScriptState* forContext(v8::Local<v8::Context>);
static ScriptState* current();
protected:
ScriptState() { }
~ScriptState();
private:
friend ScriptState* mainWorldScriptState(Frame*);
explicit ScriptState(v8::Handle<v8::Context>);
static void weakReferenceCallback(v8::Persistent<v8::Value> object, void* parameter);
v8::Local<v8::Value> m_exception;
v8::Persistent<v8::Context> m_context;
};
class EmptyScriptState : public ScriptState {
public:
EmptyScriptState() : ScriptState() { }
~EmptyScriptState() { }
};
class ScriptStateProtectedPtr {
WTF_MAKE_NONCOPYABLE(ScriptStateProtectedPtr);
public:
ScriptStateProtectedPtr() : m_scriptState(0) { }
ScriptStateProtectedPtr(ScriptState* scriptState) : m_scriptState(scriptState)
{
v8::HandleScope handleScope;
m_context = v8::Persistent<v8::Context>::New(scriptState->context());
}
~ScriptStateProtectedPtr()
{
if (!m_context.IsEmpty()) {
m_context.Dispose();
m_context.Clear();
}
}
ScriptState* get() const { return m_scriptState; }
private:
ScriptState* m_scriptState;
v8::Persistent<v8::Context> m_context;
};
ScriptState* mainWorldScriptState(Frame*);
ScriptState* scriptStateFromNode(DOMWrapperWorld*, Node*);
ScriptState* scriptStateFromPage(DOMWrapperWorld*, Page*);
#if ENABLE(WORKERS)
ScriptState* scriptStateFromWorkerContext(WorkerContext*);
#endif
inline DOMWrapperWorld* debuggerWorld() { return mainThreadNormalWorld(); }
inline DOMWrapperWorld* pluginWorld() { return mainThreadNormalWorld(); }
}
#endif // ScriptState_h