/*

 * Copyright (C) 2008 Apple 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:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 "JSJavaScriptCallFrame.h"

#if ENABLE(JAVASCRIPT_DEBUGGER)

#include "JavaScriptCallFrame.h"

#include <runtime/ArrayPrototype.h>

#include <runtime/Error.h>

using namespace JSC;

namespace WebCore {

JSValue JSJavaScriptCallFrame::evaluate(ExecState* exec)

{

    JSValue exception;

    JSValue result = impl()->evaluate(exec->argument(0).toString(exec), exception);

    if (exception)

        throwError(exec, exception);

    return result;

}

JSValue JSJavaScriptCallFrame::thisObject(ExecState*) const

{

    return impl()->thisObject() ? impl()->thisObject() : jsNull();

}

JSValue JSJavaScriptCallFrame::type(ExecState* exec) const

{

    switch (impl()->type()) {

        case DebuggerCallFrame::FunctionType:

            return jsString(exec, UString("function"));

        case DebuggerCallFrame::ProgramType:

            return jsString(exec, UString("program"));

    }

    ASSERT_NOT_REACHED();

    return jsNull();

}

JSValue JSJavaScriptCallFrame::scopeChain(ExecState* exec) const

{

    if (!impl()->scopeChain())

        return jsNull();

    const ScopeChainNode* scopeChain = impl()->scopeChain();

    ScopeChainIterator iter = scopeChain->begin();

    ScopeChainIterator end = scopeChain->end();

    // we must always have something in the scope chain

    ASSERT(iter != end);

    MarkedArgumentBuffer list;

    do {

        list.append(*iter);

        ++iter;

    } while (iter != end);

    return constructArray(exec, list);

}

JSValue JSJavaScriptCallFrame::scopeType(ExecState* exec)

{

    if (!impl()->scopeChain())

        return jsUndefined();

    if (!exec->argument(0).isInt32())

        return jsUndefined();

    int index = exec->argument(0).asInt32();

    const ScopeChainNode* scopeChain = impl()->scopeChain();

    ScopeChainIterator end = scopeChain->end();

    bool foundLocalScope = false;

    for (ScopeChainIterator iter = scopeChain->begin(); iter != end; ++iter) {

        JSObject* scope = *iter;

        if (scope->isActivationObject()) {

            if (!foundLocalScope) {

                // First activation object is local scope, each successive activation object is closure.

                if (!index)

                    return jsJavaScriptCallFrameLOCAL_SCOPE(exec, JSValue(), Identifier());

                foundLocalScope = true;

            } else if (!index)

                return jsJavaScriptCallFrameCLOSURE_SCOPE(exec, JSValue(), Identifier());

        }

        if (!index) {

            // Last in the chain is global scope.

            if (++iter == end)

                return jsJavaScriptCallFrameGLOBAL_SCOPE(exec, JSValue(), Identifier());

            return jsJavaScriptCallFrameWITH_SCOPE(exec, JSValue(), Identifier());

        }

        --index;

    }

    return jsUndefined();

}

} // namespace WebCore

#endif // ENABLE(JAVASCRIPT_DEBUGGER)