/*
 * 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.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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 "DebuggerCallFrame.h"

#include "JSFunction.h"
#include "CodeBlock.h"
#include "Machine.h"
#include "Parser.h"

namespace KJS {

const UString* DebuggerCallFrame::functionName() const
{
    if (!m_codeBlock)
        return 0;

    int callFrameOffset = m_registerOffset - m_codeBlock->numLocals - Machine::CallFrameHeaderSize;
    if (callFrameOffset < 0)
        return 0;

    Register* callFrame = *m_registerBase + callFrameOffset;
    JSFunction* function = static_cast<JSFunction*>(callFrame[Machine::Callee].u.jsValue);
    if (!function)
        return 0;
    return &function->functionName().ustring();
}

DebuggerCallFrame::Type DebuggerCallFrame::type() const
{
    if (m_registerOffset == 0)
        return ProgramType;

    int callFrameOffset = m_registerOffset - m_codeBlock->numLocals - Machine::CallFrameHeaderSize;
    ASSERT(callFrameOffset >= 0);

    Register* callFrame = *m_registerBase + callFrameOffset;
    if (callFrame[Machine::Callee].u.jsObject)
        return FunctionType;

    return ProgramType;
}

JSObject* DebuggerCallFrame::thisObject() const
{
    if (!m_codeBlock)
        return 0;

    return static_cast<JSObject*>((*m_registerBase + m_registerOffset)[m_codeBlock->thisRegister].u.jsValue);
}

JSValue* DebuggerCallFrame::evaluate(const UString& script, JSValue*& exception) const
{
    if (!m_codeBlock)
        return 0;

    JSObject* thisObject = this->thisObject();

    ExecState newExec(m_scopeChain->globalObject(), thisObject, m_scopeChain);

    int sourceId;
    int errLine;
    UString errMsg;

    RefPtr<EvalNode> evalNode = newExec.parser()->parse<EvalNode>(&newExec, UString(), 1, UStringSourceProvider::create(script), &sourceId, &errLine, &errMsg);

    if (!evalNode)
        return Error::create(&newExec, SyntaxError, errMsg, errLine, sourceId, 0);

    JSValue* result = newExec.machine()->execute(evalNode.get(), &newExec, thisObject, &newExec.dynamicGlobalObject()->registerFileStack(), m_scopeChain, &exception);
    return result;
}

} // namespace KJS