/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#ifndef INCLUDED_VCL_INC_IMPFONT_HXX
#define INCLUDED_VCL_INC_IMPFONT_HXX

#include <rtl/ustring.hxx>
#include <tools/gen.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <tools/color.hxx>
#include <vcl/dllapi.h>
#include <vcl/vclenum.hxx>
#include <vcl/fntstyle.hxx>
#include <outfont.hxx>

#include <boost/intrusive_ptr.hpp>

class ImplFontCharMap;
typedef boost::intrusive_ptr< ImplFontCharMap > ImplFontCharMapPtr;

// - Impl_Font -

class Impl_Font
{
public:
                        Impl_Font();
                        Impl_Font( const Impl_Font& );

    bool                operator==( const Impl_Font& ) const;

    FontPitch           GetPitch()      { if(mePitch==PITCH_DONTKNOW)    AskConfig(); return mePitch; }
    FontFamily          GetFamily()     { if(meFamily==FAMILY_DONTKNOW)  AskConfig(); return meFamily; }
    FontItalic          GetItalic()     { if(meItalic==ITALIC_DONTKNOW)  AskConfig(); return meItalic; }
    FontWeight          GetWeight()     { if(meWeight==WEIGHT_DONTKNOW)  AskConfig(); return meWeight; }
    FontWidth           GetWidthType()  { if(meWidthType==WIDTH_DONTKNOW)AskConfig(); return meWidthType; }

private:
    friend class vcl::Font;
    void                AskConfig();

    sal_uInt32          mnRefCount;
    OUString            maFamilyName;
    OUString            maStyleName;
    Size                maSize;
    Color               maColor;        // compatibility, now on output device
    Color               maFillColor;    // compatibility, now on output device
    rtl_TextEncoding    meCharSet;
    LanguageTag         maLanguageTag;
    LanguageTag         maCJKLanguageTag;
    FontFamily          meFamily;
    FontPitch           mePitch;
    TextAlign           meAlign;
    FontWeight          meWeight;
    FontWidth           meWidthType;
    FontItalic          meItalic;
    FontUnderline       meUnderline;
    FontUnderline       meOverline;
    FontStrikeout       meStrikeout;
    FontRelief          meRelief;
    FontEmphasisMark    meEmphasisMark;
    short               mnOrientation;
    FontKerning         mnKerning;
    bool                mbWordLine:1,
                        mbOutline:1,
                        mbConfigLookup:1,   // there was a config lookup
                        mbShadow:1,
                        mbVertical:1,
                        mbTransparent:1;    // compatibility, now on output device

    friend SvStream&    ReadImpl_Font( SvStream& rIStm, Impl_Font& );
    friend SvStream&    WriteImpl_Font( SvStream& rOStm, const Impl_Font& );
};

// - ImplFontMetric -

class ImplFontMetric
{
    friend class ::OutputDevice;

private:
    long                mnAscent;      // Ascent
    long                mnDescent;     // Descent
    long                mnIntLeading;  // Internal Leading
    long                mnExtLeading;  // External Leading
    long                mnLineHeight;  // Ascent+Descent+EmphasisMark
    long                mnSlant;       // Slant
    sal_uInt16          mnMiscFlags;   // Misc Flags
    sal_uInt32          mnRefCount;    // Reference Counter

    enum { DEVICE_FLAG=1, SCALABLE_FLAG=2, LATIN_FLAG=4, CJK_FLAG=8, CTL_FLAG=16, FULLSTOP_CENTERED_FLAG=32 };

public:
                        ImplFontMetric();
    void                AddReference();
    void                DeReference();

    long                GetAscent() const       { return mnAscent; }
    long                GetDescent() const      { return mnDescent; }
    long                GetIntLeading() const   { return mnIntLeading; }
    long                GetExtLeading() const   { return mnExtLeading; }
    long                GetLineHeight() const   { return mnLineHeight; }
    long                GetSlant() const        { return mnSlant; }
    bool                IsFullstopCentered() const { return  ((mnMiscFlags & FULLSTOP_CENTERED_FLAG ) != 0); }

    bool                IsScalable() const      { return ((mnMiscFlags & SCALABLE_FLAG) != 0); }

    bool                operator==( const ImplFontMetric& ) const;
};

typedef struct _FcPattern   FcPattern;
class FontConfigFontOptions
{
public:
    FontEmbeddedBitmap meEmbeddedBitmap; // whether the embedded bitmaps should be used
    FontAntiAlias      meAntiAlias;      // whether the font should be antialiased
    FontAutoHint       meAutoHint;       // whether the font should be autohinted
    FontHinting        meHinting;        // whether the font should be hinted
    FontHintStyle      meHintStyle;      // type of font hinting to be used

                        FontConfigFontOptions() :
                            meEmbeddedBitmap(EMBEDDEDBITMAP_DONTKNOW),
                            meAntiAlias(ANTIALIAS_DONTKNOW),
                            meAutoHint(AUTOHINT_DONTKNOW),
                            meHinting(HINTING_DONTKNOW),
                            meHintStyle(HINT_SLIGHT),
                            mpPattern(nullptr) {}
                        FontConfigFontOptions(FcPattern* pPattern) :
                            meEmbeddedBitmap(EMBEDDEDBITMAP_DONTKNOW),
                            meAntiAlias(ANTIALIAS_DONTKNOW),
                            meAutoHint(AUTOHINT_DONTKNOW),
                            meHinting(HINTING_DONTKNOW),
                            meHintStyle(HINT_SLIGHT),
                            mpPattern(pPattern) {}
                        ~FontConfigFontOptions();

    FontAutoHint        GetUseAutoHint() const { return meAutoHint; }
    FontHintStyle       GetHintStyle() const { return meHintStyle; }
    bool                DontUseEmbeddedBitmaps() const { return meEmbeddedBitmap == EMBEDDEDBITMAP_FALSE; }
    bool                DontUseAntiAlias() const { return meAntiAlias == ANTIALIAS_FALSE; }
    bool                DontUseHinting() const { return (meHinting == HINTING_FALSE) || (GetHintStyle() == HINT_NONE); }
    void*               GetPattern(void * /*pFace*/, bool /*bEmbolden*/) const;
private:
    FcPattern* mpPattern;
};

// - ImplFontCharMap -

class CmapResult;

class VCL_PLUGIN_PUBLIC ImplFontCharMap
{
public:
    explicit            ImplFontCharMap( const CmapResult& );
    virtual             ~ImplFontCharMap();

private:
    friend class FontCharMap;
    friend void intrusive_ptr_add_ref(ImplFontCharMap* pImplFontCharMap);
    friend void intrusive_ptr_release(ImplFontCharMap* pImplFontCharMap);

                        ImplFontCharMap( const ImplFontCharMap& ) = delete;
    void                operator=( const ImplFontCharMap& ) = delete;

    static ImplFontCharMapPtr getDefaultMap( bool bSymbols=false);
    bool                isDefaultMap() const;

private:
    const sal_uInt32*   mpRangeCodes;     // pairs of StartCode/(EndCode+1)
    const int*          mpStartGlyphs;    // range-specific mapper to glyphs
    const sal_uInt16*   mpGlyphIds;       // individual glyphid mappings
    int                 mnRangeCount;
    int                 mnCharCount;      // covered codepoints
    mutable sal_uInt32  mnRefCount;
};

inline void intrusive_ptr_add_ref(ImplFontCharMap* pImplFontCharMap)
{
    ++pImplFontCharMap->mnRefCount;
}

inline void intrusive_ptr_release(ImplFontCharMap* pImplFontCharMap)
{
    if (--pImplFontCharMap->mnRefCount == 0)
        delete pImplFontCharMap;
}

// CmapResult is a normalized version of the many CMAP formats
class VCL_PLUGIN_PUBLIC CmapResult
{
public:
    explicit            CmapResult( bool bSymbolic = false,
                            const sal_uInt32* pRangeCodes = nullptr, int nRangeCount = 0,
                            const int* pStartGlyphs = nullptr, const sal_uInt16* pGlyphIds = nullptr );

    const sal_uInt32*   mpRangeCodes;
    const int*          mpStartGlyphs;
    const sal_uInt16*   mpGlyphIds;
    int                 mnRangeCount;
    bool                mbSymbolic;
    bool                mbRecoded;
};

bool ParseCMAP( const unsigned char* pRawData, int nRawLength, CmapResult& );

#endif // INCLUDED_VCL_INC_IMPFONT_HXX

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