/*

 * 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 "CSSVariablesDeclaration.h"

#include "CSSParser.h"

#include "CSSRule.h"

#include "CSSValueList.h"

#include "Document.h"

#include "ExceptionCode.h"

namespace WebCore {

CSSVariablesDeclaration::CSSVariablesDeclaration(StyleBase* parent, const Vector<String>& names, const Vector<RefPtr<CSSValue> >& values)

    : StyleBase(parent)

{

    m_variableNames = names;

    ASSERT(names.size() == values.size());

    unsigned s = names.size();

    for (unsigned i = 0; i < s; ++i)

        addParsedVariable(names[i], values[i], false);

}

CSSVariablesDeclaration::~CSSVariablesDeclaration()

{

}

String CSSVariablesDeclaration::getVariableValue(const String& variableName)

{

    CSSValue* val = m_variablesMap.get(variableName).get();

    if (val)

        return val->cssText();

    return "";

}

String CSSVariablesDeclaration::removeVariable(const String& variableName, ExceptionCode&)

{

    // FIXME: The spec has this method taking an exception code but no exceptions are

    // specified as being thrown.

    RefPtr<CSSValue> val = m_variablesMap.take(variableName);

    String result = val ? val->cssText() : "";

    if (val) {

        int s = m_variableNames.size();

        for (int i = 0; i < s; ++i) {

            if (m_variableNames[i] == variableName) {

                m_variableNames.remove(i);

                i--;

                s--;

            }

        }

        setNeedsStyleRecalc();

    }

    // FIXME: Communicate this change so that the document will update.

    return result;

}

void CSSVariablesDeclaration::setVariable(const String& variableName, const String& variableValue, ExceptionCode& excCode)

{

    // Try to parse the variable value into a Value*.  If it fails we throw an exception.

    CSSParser parser(useStrictParsing());

    if (!parser.parseVariable(this, variableName, variableValue)) // If the parse succeeds, it will call addParsedVariable (our internal method for doing the add) with the parsed Value*.

        excCode = SYNTAX_ERR;

    else

        setNeedsStyleRecalc();

}

void CSSVariablesDeclaration::addParsedVariable(const String& variableName, PassRefPtr<CSSValue> variableValue, bool updateNamesList)

{

// FIXME: Disabling declarations as variable values for now since they no longer have a common base class with CSSValues.

#if 0

    variableValue->setParent(this); // Needed to connect variables that are CSSMutableStyleDeclarations, since the parent couldn't be set until now.

#endif

    // Don't leak duplicates.  For multiple variables with the same name, the last one

    // declared will win.

    CSSValue* current = m_variablesMap.take(variableName).get();

    if (!current && updateNamesList)

        m_variableNames.append(variableName);

    m_variablesMap.set(variableName, variableValue);

    // FIXME: Communicate this change so the document will update.

}

CSSValueList* CSSVariablesDeclaration::getParsedVariable(const String& variableName)

{

    CSSValue* result = m_variablesMap.get(variableName).get();

    if (result->isValueList())

        return static_cast<CSSValueList*>(result);

    return 0;

}

CSSMutableStyleDeclaration* CSSVariablesDeclaration::getParsedVariableDeclarationBlock(const String&)

{

// FIXME: Disabling declarations as variable values for now since they no longer have a common base class with CSSValues.

#if 0

    StyleBase* result = m_variablesMap.get(variableName).get();

    if (result->isMutableStyleDeclaration())

        return static_cast<CSSMutableStyleDeclaration*>(result);

#endif

    return 0;

}

unsigned CSSVariablesDeclaration::length() const

{

    return m_variableNames.size();

}

String CSSVariablesDeclaration::item(unsigned index)

{

    if (index >= m_variableNames.size())

        return "";

    return m_variableNames[index];

}

CSSRule* CSSVariablesDeclaration::parentRule()

{

    return (parent() && parent()->isRule()) ? static_cast<CSSRule*>(parent()) : 0;

}

String CSSVariablesDeclaration::cssText() const

{

    String result = "{ ";

    unsigned s = m_variableNames.size();

    for (unsigned i = 0; i < s; ++i) {

        result += m_variableNames[i] + ": ";

        result += m_variablesMap.get(m_variableNames[i])->cssText();

        if (i < s - 1)

            result += "; ";

    }

    result += " }";

    return result;

}

void CSSVariablesDeclaration::setCssText(const String&)

{

    // FIXME: It's not clear if this is actually settable.

}

void CSSVariablesDeclaration::setNeedsStyleRecalc()

{

    // FIXME: Make this much better (it has the same problem CSSMutableStyleDeclaration does).

    StyleBase* root = this;

    while (StyleBase* parent = root->parent())

        root = parent;

    if (root->isCSSStyleSheet())

        static_cast<CSSStyleSheet*>(root)->doc()->updateStyleSelector();

}

}