Source/WebCore/css/CSSPageRule.cpp

/*
 * (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 "CSSPageDescriptors.h"
#include "CSSSelectorParser.h"
#include "CSSSerializationContext.h"
#include "CSSStyleSheet.h"
#include "CommonAtomStrings.h"
#include "Document.h"
#include "StyleProperties.h"
#include "StyleRule.h"
#include "StyleSheetContents.h"
#include <wtf/text/MakeString.h>

namespace WebCore {

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

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

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

String CSSPageRule::selectorText() const
{
    if (auto& selector = m_pageRule->selector(); !selector.selectorText().isEmpty())
        return selector.selectorText();
    return emptyString();
}

void CSSPageRule::setSelectorText(const String& selectorText)
{
    RefPtr sheet = parentStyleSheet();
    RefPtr sheetContents = sheet ? &sheet->contents() : nullptr;
    auto selectorList = CSSSelectorParser::parseSelectorList(selectorText, parserContext(), sheetContents.get());
    if (!selectorList)
        return;

    CSSStyleSheet::RuleMutationScope mutationScope(this);

    m_pageRule->wrapperAdoptSelectorList(WTF::move(*selectorList));
}

String CSSPageRule::cssText() const
{
    auto selector = selectorText();
    auto optionalSpace = selector.isEmpty() ? ""_s : " "_s;
    if (auto declarations = m_pageRule->properties().asText(CSS::defaultSerializationContext()); !declarations.isEmpty())
        return makeString("@page"_s, optionalSpace, selector, " { "_s, declarations, " }"_s);
    return makeString("@page"_s, optionalSpace, selector, " { }"_s);
}

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

} // namespace WebCore