/*
 * This file is part of the DOM implementation for KDE.
 *
 * Copyright 1999-2003 Lars Knoll (knoll@kde.org)
 * Copyright 2004 Apple Computer, Inc.
 *
 * 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.
 *
 */
#ifndef _CSS_css_stylesheetimpl_h_
#define _CSS_css_stylesheetimpl_h_

#include "dom/dom_string.h"
#include "css/css_base.h"
#include "misc/loader_client.h"
#include "xml/dom_docimpl.h"
#include <QPointer>

namespace khtml
{
class CachedCSSStyleSheet;
class DocLoader;
class MediaQuery;
}

namespace DOM
{

class StyleSheet;
class CSSStyleSheet;
class CSSParser;
class MediaListImpl;
class CSSRuleImpl;
class CSSNamespaceRuleImpl;
class CSSRuleListImpl;
class NodeImpl;
class DocumentImpl;

class StyleSheetImpl : public StyleListImpl
{
public:
    StyleSheetImpl(DOM::NodeImpl *ownerNode, DOM::DOMString href = DOMString());
    StyleSheetImpl(StyleSheetImpl *parentSheet, DOM::DOMString href = DOMString());
    StyleSheetImpl(StyleBaseImpl *owner, DOM::DOMString href  = DOMString());
    StyleSheetImpl(khtml::CachedCSSStyleSheet *cached, DOM::DOMString href  = DOMString());
    virtual ~StyleSheetImpl();

    virtual bool isStyleSheet() const
    {
        return true;
    }

    virtual DOM::DOMString type() const
    {
        return DOMString();
    }

    bool disabled() const
    {
        return m_disabled;
    }
    void setDisabled(bool disabled);
    DOM::NodeImpl *ownerNode() const
    {
        return m_parentNode;
    }
    StyleSheetImpl *parentStyleSheet() const;
    DOM::DOMString href() const
    {
        return m_strHref;
    }
    void setHref(const DOM::DOMString &href)
    {
        m_strHref = href;
    }
    DOM::DOMString title() const
    {
        return m_strTitle;
    }
    MediaListImpl *media() const
    {
        return m_media;
    }
    void setMedia(MediaListImpl *media);
    void setTitle(const DOM::DOMString &title)
    {
        m_strTitle = title;
    }

protected:
    DOM::NodeImpl *m_parentNode;
    DOM::DOMString m_strHref;
    DOM::DOMString m_strTitle;
    MediaListImpl *m_media;
    bool m_disabled;
};

class CSSStyleSheetImpl : public StyleSheetImpl
{
public:
    CSSStyleSheetImpl(DOM::NodeImpl *parentNode, DOM::DOMString href = DOMString(), bool _implicit = false);
    CSSStyleSheetImpl(CSSStyleSheetImpl *parentSheet, DOM::DOMString href = DOMString());
    CSSStyleSheetImpl(CSSRuleImpl *ownerRule, DOM::DOMString href = DOMString());
    // clone from a cached version of the sheet
    CSSStyleSheetImpl(DOM::NodeImpl *parentNode, CSSStyleSheetImpl *orig);
    CSSStyleSheetImpl(CSSRuleImpl *ownerRule, CSSStyleSheetImpl *orig);

    ~CSSStyleSheetImpl()
    {
        delete m_namespaces;
    }

    virtual bool isCSSStyleSheet() const
    {
        return true;
    }

    virtual DOM::DOMString type() const
    {
        return "text/css";
    }

    CSSRuleImpl *ownerRule() const;
    CSSRuleListImpl *cssRules(bool omitCharsetRule = false);
    unsigned long insertRule(const DOM::DOMString &rule, unsigned long index, int &exceptioncode);
    void deleteRule(unsigned long index, int &exceptioncode);

    void determineNamespace(NamespaceName &namespacename, const DOM::DOMString &prefix);
    quint32 defaultNamespace()
    {
        return m_defaultNamespace.id();
    }
    void appendNamespaceRule(CSSNamespaceRuleImpl *ns);

    void setCharset(const DOMString &charset)
    {
        m_charset = charset;
    }
    const DOMString &charset() const
    {
        return m_charset;
    }

    virtual bool parseString(const DOMString &string, bool strict = true);

    bool isLoading() const;

    virtual void checkLoaded() const;
    virtual void checkPending() const;
    bool loadedHint() const
    {
        return m_loadedHint;
    }

    // ### remove? (clients should use sheet->doc()->docLoader())
    khtml::DocLoader *docLoader() const
    {
        return m_doc ? m_doc->docLoader() : 0;
    }

    DocumentImpl *doc() const
    {
        return m_doc;
    }
    bool implicit() const
    {
        return m_implicit;
    }
protected:
    void recomputeNamespaceInfo(); // updates m_defaultNamespace and m_namespaces
    // we update m_namespaces lazily, but
    // m_defaulNamespace eagerly.
    void dirtyNamespaceInfo()
    {
        delete m_namespaces;
        m_namespaces = 0;
    }

    DocumentImpl *m_doc;
    bool m_implicit;
    mutable bool m_loadedHint;
    NamespaceName m_defaultNamespace;
    QList<CSSNamespaceRuleImpl *> *m_namespaces;
    DOMString m_charset;
};

// ----------------------------------------------------------------------------

class StyleSheetListImpl : public khtml::Shared<StyleSheetListImpl>
{
public:
    // the manager argument should be passed only when this is
    // document.styleSheets.
    StyleSheetListImpl(DocumentImpl *manager = 0): managerDocument(manager) {}
    ~StyleSheetListImpl();

    // the following two ignore implicit stylesheets
    unsigned long length() const;
    StyleSheetImpl *item(unsigned long index);

    void add(StyleSheetImpl *s);
    void remove(StyleSheetImpl *s);

    QList<StyleSheetImpl *> styleSheets;

    // we need the document pointer to make it update the stylesheet list
    // if needed for the global list. Luckily, we don't care about that if the
    // document dies, so we use QPointer to break the cycle
    QPointer<DocumentImpl> managerDocument;
};

// ----------------------------------------------------------------------------

class MediaListImpl : public StyleBaseImpl
{
public:
    MediaListImpl(bool fallbackToDescription = false)
        : StyleBaseImpl(0), m_fallback(fallbackToDescription) {}
    MediaListImpl(CSSStyleSheetImpl *parentSheet, bool fallbackToDescription = false)
        : StyleBaseImpl(parentSheet), m_fallback(fallbackToDescription) {}
    MediaListImpl(CSSStyleSheetImpl *parentSheet,
                  const DOM::DOMString &media, bool fallbackToDescription = false);
    MediaListImpl(CSSRuleImpl *parentRule, const DOM::DOMString &media, bool fallbackToDescription = false);
    ~MediaListImpl();

    virtual bool isMediaList() const
    {
        return true;
    }

    CSSStyleSheetImpl *parentStyleSheet() const;
    CSSRuleImpl *parentRule() const;
    unsigned long length() const
    {
        return  m_queries.size();
    }
    DOM::DOMString item(unsigned long index) const;
    void deleteMedium(const DOM::DOMString &oldMedium, int &ec);
    void appendMedium(const DOM::DOMString &newMedium, int &ec);

    DOM::DOMString mediaText() const;
    void setMediaText(const DOM::DOMString &value, int &ec);

    void appendMediaQuery(khtml::MediaQuery *mediaQuery);
    const QList<khtml::MediaQuery *> *mediaQueries() const
    {
        return &m_queries;
    }

protected:
    QList<khtml::MediaQuery *> m_queries;
    bool m_fallback; // true if failed media query parsing should fallback to media description parsing
};

} // namespace

#endif

