/*
 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2009 Germain Garand <germain@ebooksfrance.org>
 *
 * 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
 * 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.
 */

#ifndef css_webfont_h
#define css_webfont_h

#include "dom/dom_string.h"
#include "misc/shared.h"
#include "misc/loader.h"
#include "css/css_valueimpl.h"

#include <wtf/HashMap.h>
#include <wtf/RefPtr.h>
#include <wtf/HashSet.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>

#include <QHash>

namespace DOM
{

class CSSFontFace;
class CSSFontFaceRuleImpl;
class CSSFontSelector;
class CSSSegmentedFontFace;
class DocumentImpl;
class DocLoader;
class FontDef;

enum {
    FontStyleNormalBit = 0,
    FontStyleItalicBit,
    FontVariantNormalBit,
    FontVariantSmallCapsBit,
    FontWeight100Bit,
    FontWeight200Bit,
    FontWeight300Bit,
    FontWeight400Bit,
    FontWeight500Bit,
    FontWeight600Bit,
    FontWeight700Bit,
    FontWeight800Bit,
    FontWeight900Bit,
    FontTraitsMaskWidth
};

enum FontTraitsMask {
    FontStyleNormalMask = 1 << FontStyleNormalBit,
    FontStyleItalicMask = 1 << FontStyleItalicBit,
    FontStyleMask = FontStyleNormalMask | FontStyleItalicMask,

    FontVariantNormalMask = 1 << FontVariantNormalBit,
    FontVariantSmallCapsMask = 1 << FontVariantSmallCapsBit,
    FontVariantMask = FontVariantNormalMask | FontVariantSmallCapsMask,

    FontWeight100Mask = 1 << FontWeight100Bit,
    FontWeight200Mask = 1 << FontWeight200Bit,
    FontWeight300Mask = 1 << FontWeight300Bit,
    FontWeight400Mask = 1 << FontWeight400Bit,
    FontWeight500Mask = 1 << FontWeight500Bit,
    FontWeight600Mask = 1 << FontWeight600Bit,
    FontWeight700Mask = 1 << FontWeight700Bit,
    FontWeight800Mask = 1 << FontWeight800Bit,
    FontWeight900Mask = 1 << FontWeight900Bit,
    FontWeightMask = FontWeight100Mask | FontWeight200Mask | FontWeight300Mask | FontWeight400Mask | FontWeight500Mask | FontWeight600Mask | FontWeight700Mask | FontWeight800Mask | FontWeight900Mask
};

class CSSSegmentedFontFace :  public khtml::Shared<CSSSegmentedFontFace>
{
public:
    CSSSegmentedFontFace(CSSFontSelector *);
    ~CSSSegmentedFontFace();

    bool isLoaded() const;
    bool isValid() const;
    CSSFontSelector *fontSelector() const
    {
        return m_fontSelector;
    }

    void fontLoaded(CSSFontFace *);

    void appendFontFace(CSSFontFace);

//    FontData* getFontData(const FontDescription&);

private:

//    void pruneTable();

    CSSFontSelector *m_fontSelector;
//    HashMap<unsigned, SegmentedFontData*> m_fontDataTable;
//    WTF::Vector<WTF::RefPtr<CSSFontFace>, 1> m_fontFaces;
};

class CSSFontFaceSource : public khtml::CachedObjectClient
{
public:
    CSSFontFaceSource(const DOMString &, bool distant = false);
    virtual ~CSSFontFaceSource();

    bool isLoaded() const;
    bool isValid() const;

    DOMString string() const
    {
        return m_string;
    }

    void setFontFace(CSSFontFace *face)
    {
        m_face = face;
    }

    void notifyFinished(khtml::CachedObject *finishedObj) Q_DECL_OVERRIDE;
    void refLoader();

//    SimpleFontData* getFontData(const FontDef&, bool syntheticBold, bool syntheticItalic, CSSFontSelector*);
//    void pruneTable();

#if 0
    // ENABLE(SVG_FONTS)
    SVGFontFaceElement *svgFontFaceElement() const
    {
        return m_svgFontFaceElement;
    }
    void setSVGFontFaceElement(SVGFontFaceElement *element)
    {
        m_svgFontFaceElement = element;
    }
#endif

private:
    DOMString m_string; // URI for remote, built-in font name for local.
    khtml::CachedFont *m_font; // For remote fonts, a pointer to our cached resource.
    CSSFontFace *m_face; // Our owning font face.
    int m_id; // Qt identifier for the Application font.
    bool m_refed;
    bool m_distant;
//    HashMap<unsigned, SimpleFontData*> m_fontDataTable; // The hash key is composed of size synthetic styles.

#if 0
    // ENABLE(SVG_FONTS)
    SVGFontFaceElement *m_svgFontFaceElement;
    RefPtr<SVGFontElement> m_externalSVGFontElement;
#endif
};

class CSSFontFace : public khtml::Shared<CSSFontFace>
{
public:
    CSSFontFace(FontTraitsMask traitsMask, CSSFontSelector *fs)
        : m_traitsMask(traitsMask), m_fontSelector(fs), m_refed(false), m_installed(false)
    {
    }
    ~CSSFontFace();

    FontTraitsMask traitsMask() const
    {
        return m_traitsMask;
    }

    /*
        struct UnicodeRange;

        void addRange(UChar32 from, UChar32 to) { m_ranges.append(UnicodeRange(from, to)); }
        const Vector<UnicodeRange>& ranges() const { return m_ranges; }
    */
    void addedToSegmentedFontFace(CSSSegmentedFontFace *);
    void removedFromSegmentedFontFace(CSSSegmentedFontFace *);

    bool isLoaded() const;
    bool isValid() const;

    void setInstalled();
    bool installed() const;

    void addSource(CSSFontFaceSource *);

    void fontLoaded(CSSFontFaceSource *);
    void addFamilyName(const DOMString &name)
    {
        m_names.append(name);
    }
    WTF::Vector<DOMString> familyNames() const
    {
        return m_names;
    }
    CSSFontSelector *fontSelector() const
    {
        return m_fontSelector;
    }
    void refLoaders(); // start loading all sources

//    SimpleFontData* getFontData(const FontDef&, bool syntheticBold, bool syntheticItalic);

    /*
        struct UnicodeRange {
            UnicodeRange(UChar32 from, UChar32 to)
                : m_from(from)
                , m_to(to)
            {
            }

            UChar32 from() const { return m_from; }
            UChar32 to() const { return m_to; }

        private:
            UChar32 m_from;
            UChar32 m_to;
        };
    */

private:
    FontTraitsMask m_traitsMask;
//    Vector<UnicodeRange> m_ranges;
//    HashSet<CSSSegmentedFontFace*> m_segmentedFontFaces;
    WTF::Vector<DOMString> m_names;
    WTF::Vector<CSSFontFaceSource *> m_sources;
    CSSFontSelector *m_fontSelector;
    bool m_refed;
    bool m_installed; // Successfully added into application font db
};

class CSSFontSelector : public khtml::Shared<CSSFontSelector>
{
public:
    CSSFontSelector(DocumentImpl *);
    virtual ~CSSFontSelector();

//    virtual FontData* getFontData(const FontDef& fontDescription, const DOMString& familyName);
    void requestFamilyName(const DOMString &familyName);
    void clearDocument()
    {
        m_document = nullptr;
    }
    void addFontFaceRule(const CSSFontFaceRuleImpl *);
    void fontLoaded();
    virtual void fontCacheInvalidated();
    bool isEmpty() const;
    khtml::DocLoader *docLoader() const;

private:

    DocumentImpl *m_document;
//    HashMap<DOMString, Vector<RefPtr<CSSFontFace> >*, CaseFoldingHash> m_fontFaces;
//    WTF::HashMap<DOMString, WTF::Vector<WTF::RefPtr<CSSFontFace> >*, CaseFoldingHash> m_locallyInstalledFontFaces;
    QHash<DOMString, CSSFontFace *> m_locallyInstalledFontFaces;
//    HashMap<DOMString, HashMap<unsigned, RefPtr<CSSSegmentedFontFace> >*, CaseFoldingHash> m_fonts;
};

} // namespace DOM

#endif // css_webfont_h
