xref: /external/webkit/Source/WebCore/html/HTMLMetaElement.cpp

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 *           (C) 2001 Dirk Mueller (mueller@kde.org)
 * Copyright (C) 2003, 2010 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 "HTMLMetaElement.h"

#include "Attribute.h"
#include "Document.h"
#include "HTMLNames.h"

#ifdef ANDROID_META_SUPPORT
#include "PlatformBridge.h"
#include "Settings.h"
#endif

#if ENABLE(ANDROID_INSTALLABLE_WEB_APPS)
#include "ChromeClient.h"
#endif

namespace WebCore {

using namespace HTMLNames;

inline HTMLMetaElement::HTMLMetaElement(const QualifiedName& tagName, Document* document)
    : HTMLElement(tagName, document)
{
    ASSERT(hasTagName(metaTag));
}

PassRefPtr<HTMLMetaElement> HTMLMetaElement::create(const QualifiedName& tagName, Document* document)
{
    return adoptRef(new HTMLMetaElement(tagName, document));
}

void HTMLMetaElement::parseMappedAttribute(Attribute* attr)
{
    if (attr->name() == http_equivAttr) {
        m_equiv = attr->value();
        process();
    } else if (attr->name() == contentAttr) {
        m_content = attr->value();
        process();
    } else if (attr->name() == nameAttr) {
        // Do nothing.
    } else
        HTMLElement::parseMappedAttribute(attr);
}

void HTMLMetaElement::insertedIntoDocument()
{
    HTMLElement::insertedIntoDocument();
    process();
}

void HTMLMetaElement::process()
{
    if (!inDocument() || m_content.isNull())
        return;
    if (equalIgnoringCase(name(), "viewport"))
        document()->processViewport(m_content);
#ifdef ANDROID_META_SUPPORT
    // TODO: Evaluate whether to take upstreamed meta support
    else if (equalIgnoringCase(name(), "format-detection"))
        document()->processMetadataSettings(m_content);
    else if (((equalIgnoringCase(name(), "HandheldFriendly") && equalIgnoringCase(m_content, "true")) || equalIgnoringCase(name(), "MobileOptimized"))
        && document()->settings()
        && document()->settings()->viewportWidth() == -1) {
        // fit mobile sites directly in the screen
        document()->processViewport("width=device-width");
    }
#endif

#if ENABLE(ANDROID_INSTALLABLE_WEB_APPS)
    // If this web site is informing us it is possible for it to be installed, inform the chrome
    // client so it can offer this to the user.
    if (equalIgnoringCase(name(), "fullscreen-web-app-capable")
        && equalIgnoringCase(m_content, "yes")) {
        if (Page* page = document()->page())
            page->chrome()->client()->webAppCanBeInstalled();
    }
#endif

    // Get the document to process the tag, but only if we're actually part of DOM tree (changing a meta tag while
    // it's not in the tree shouldn't have any effect on the document)
    if (!m_equiv.isNull())
        document()->processHttpEquiv(m_equiv, m_content);
}

String HTMLMetaElement::content() const
{
    return getAttribute(contentAttr);
}

String HTMLMetaElement::httpEquiv() const
{
    return getAttribute(http_equivAttr);
}

String HTMLMetaElement::name() const
{
    return getAttribute(nameAttr);
}

}