/*
 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
 * (C) 2002-2003 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2002, 2005, 2006, 2008, 2012 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "config.h"
#include "CSSPageRule.h"

#include "CSSParser.h"
#include "CSSSelector.h"
#include "CSSStyleSheet.h"
#include "Document.h"
#include "PropertySetCSSStyleDeclaration.h"
#include "StyleProperties.h"
#include "StyleRule.h"
#include <wtf/text/StringBuilder.h>

namespace WebCore {

CSSPageRule::CSSPageRule(StyleRulePage& pageRule, CSSStyleSheet* parent)
    : CSSRule(parent)
    , m_pageRule(pageRule)
{
}

CSSPageRule::~CSSPageRule()
{
    if (m_propertiesCSSOMWrapper)
        m_propertiesCSSOMWrapper->clearParentRule();
}

CSSStyleDeclaration& CSSPageRule::style()
{
    if (!m_propertiesCSSOMWrapper)
        m_propertiesCSSOMWrapper = StyleRuleCSSStyleDeclaration::create(m_pageRule->mutableProperties(), *this);
    return *m_propertiesCSSOMWrapper;
}

String CSSPageRule::selectorText() const
{
    if (auto* selector = m_pageRule->selector()) {
        String pageSpecification = selector->selectorText();
        if (!pageSpecification.isEmpty() && pageSpecification != starAtom())
            return makeString("@page ", pageSpecification);
    }
    return "@page"_s;
}

void CSSPageRule::setSelectorText(const String& selectorText)
{
    CSSParser parser(parserContext());
    CSSSelectorList selectorList;
    parser.parseSelector(selectorText, selectorList);
    if (!selectorList.isValid())
        return;

    CSSStyleSheet::RuleMutationScope mutationScope(this);

    m_pageRule->wrapperAdoptSelectorList(WTFMove(selectorList));
}

String CSSPageRule::cssText() const
{
    StringBuilder result;
    result.append(selectorText());
    result.appendLiteral(" { ");
    String decls = m_pageRule->properties().asText();
    result.append(decls);
    if (!decls.isEmpty())
        result.append(' ');
    result.append('}');
    return result.toString();
}

void CSSPageRule::reattach(StyleRuleBase& rule)
{
    m_pageRule = downcast<StyleRulePage>(rule);
    if (m_propertiesCSSOMWrapper)
        m_propertiesCSSOMWrapper->reattach(m_pageRule.get().mutableProperties());
}

} // namespace WebCore