/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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
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#ifndef INCLUDED_FONTCHARMAP_HXX
#define INCLUDED_FONTCHARMAP_HXX

#include <vcl/dllapi.h>
#include <vcl/font.hxx>
#include <vcl/outdev.hxx>

#include <boost/intrusive_ptr.hpp>

class ImplFontCharMap;
class CmapResult;

typedef sal_uInt32 sal_UCS4;
typedef boost::intrusive_ptr< ImplFontCharMap > ImplFontCharMapPtr;
typedef boost::intrusive_ptr< FontCharMap > FontCharMapPtr;

class VCL_DLLPUBLIC FontCharMap
{
public:
    /** A new FontCharMap is created based on a "default" map, which includes
        all codepoints in the Unicode BMP range, including surrogates.
     **/
                        FontCharMap();
                        FontCharMap( const CmapResult& rCR );
                        ~FontCharMap();

    /** Get the default font character map

        @returns the default font character map.
     */
    static FontCharMapPtr GetDefaultMap( bool bSymbols=false );

    /** Determines if the font character map is the "default". The default map
        includes all codepoints in the Unicode BMP range, including surrogates.

        @returns true if default map, false if not default map.
     */
    bool                IsDefaultMap() const;

    /** Does the font character map include the UCS4 character?

        @returns true if character exists in font character map, false is not.
     */
    bool                HasChar( sal_UCS4 ) const;

    /** Returns the number of chars supported by the font, which
        are inside the unicode range from cMin to cMax (inclusive).

        @param  cMin        Lowest codepoint in range to be counted
        @param  cMax        Highest codepoint in range to be counted

        @returns number of characters in the font charmap between the two
                 codepoints.
     */
    int                 CountCharsInRange( sal_UCS4 cMin, sal_UCS4 cMax ) const;

    /** Get the number of characters in the font character map.

        @returns number of characters in the font character map.
     */
    int                 GetCharCount() const;

    /** Get the first character in the font character map.

        @returns first character in the font character map.
     */
    sal_UCS4            GetFirstChar() const;

    /** Get the last character in the font character map.

        @returns last character in the font character map.
     */
    sal_UCS4            GetLastChar() const;

    /** Get the next character in the font character map. This is important
        because character maps (e.g. the default map which holds the characters
        in the BMP plane) can have discontiguous ranges.

        @param  cChar       Character from which to find next character

        @returns next character in the font character map.
     */
    sal_UCS4            GetNextChar( sal_UCS4 cChar ) const;

    /** Get the previous character in the font character map. This is important
        because character maps (e.g. the default map which holds the characters
        in the BMP plane) can have discontiguous ranges.

        @param  cChar       Character from which to find previous character

        @returns previous character in the font character map.
     */
    sal_UCS4            GetPrevChar( sal_UCS4 cChar ) const;

    /** Get the index of a particular character in the font character map. The
        index is different from the codepoint, because font character maps can

        determine the index.

        @param  cChar       Character used to find index number

        @returns Index of character in font character map.
     */
    int                 GetIndexFromChar( sal_UCS4 cChar ) const;

    /** Get the character at a particular index in the font character map. The
        index is different from the codepoint, because font character maps can

        determine the character.

        @param  nCharIndex  Index used to find the character

        @returns Character in font character map.
     */
    sal_UCS4            GetCharFromIndex( int nCharIndex ) const;

    int                 GetGlyphIndex( sal_UCS4 ) const;

private:
    ImplFontCharMapPtr  mpImplFontCharMap;

    friend class ::OutputDevice;
    friend void intrusive_ptr_release(FontCharMap* pFontCharMap);
    friend void intrusive_ptr_add_ref(FontCharMap* pFontCharMap);

    int                 findRangeIndex( sal_uInt32 ) const;

                        FontCharMap( ImplFontCharMapPtr pIFCMap );

    sal_uInt32          mnRefCount;

    // prevent assignment and copy construction
                        FontCharMap( const FontCharMap& ) = delete;
    void                operator=( const FontCharMap& ) = delete;
};

inline void intrusive_ptr_add_ref(FontCharMap* pFontCharMap)
{
    ++pFontCharMap->mnRefCount;
}

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


// 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;
};

#endif // INCLUDED_FONTCHARMAP_HXX

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