Source/WebCore/contentextensions/ContentExtensionStyleSheet.cpp

/*
 * Copyright (C) 2015-2016 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. 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 INC. 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 "ContentExtensionStyleSheet.h"

#if ENABLE(CONTENT_EXTENSIONS)

#include "CSSStyleSheet.h"
#include "ContentExtensionsBackend.h"
#include "Document.h"
#include "StyleSheetContents.h"
#include <wtf/text/StringBuilder.h>

namespace WebCore {
namespace ContentExtensions {

ContentExtensionStyleSheet::ContentExtensionStyleSheet(Document& document)
    : m_styleSheet(CSSStyleSheet::create(StyleSheetContents::create(), document))
{
    m_styleSheet->contents().setIsUserStyleSheet(true);
}

ContentExtensionStyleSheet::~ContentExtensionStyleSheet()
{
    m_styleSheet->clearOwnerNode();
}

bool ContentExtensionStyleSheet::addDisplayNoneSelector(const String& selector, uint32_t selectorID)
{
    ASSERT(selectorID != std::numeric_limits<uint32_t>::max());

    if (!m_addedSelectorIDs.add(selectorID).isNewEntry)
        return false;

    StringBuilder css;
    css.append(selector);
    css.append('{');
    css.append(ContentExtensionsBackend::displayNoneCSSRule());
    css.append('}');
    m_styleSheet->contents().parseString(css.toString());
    return true;
}

} // namespace ContentExtensions
} // namespace WebCore

#endif // ENABLE(CONTENT_EXTENSIONS)