[apple/icu.git] / icuSources / layout / CharSubstitutionFilter.h

/*
 *
 * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
 *
 */

#ifndef __CHARSUBSTITUTIONFILTER_H
#define __CHARSUBSTITUTIONFILTER_H

#include "LETypes.h"
#include "LEGlyphFilter.h"

U_NAMESPACE_BEGIN

class LEFontInstance;

/**
 * This filter is used by character-based GSUB processors. It
 * accepts only those characters which the given font can display.
 *
 * @internal
 */
class CharSubstitutionFilter : public UMemory, public LEGlyphFilter
{
private:
    /**
     * Holds the font which is used to test the characters.
     *
     * @internal
     */
    const LEFontInstance *fFontInstance;

    /**
     * The copy constructor. Not allowed!
     *
     * @internal
     */
    CharSubstitutionFilter(const CharSubstitutionFilter &other); // forbid copying of this class

    /**
     * The replacement operator. Not allowed!
     *
     * @internal
     */
    CharSubstitutionFilter &operator=(const CharSubstitutionFilter &other); // forbid copying of this class

public:
    /**
     * The constructor.
     *
     * @param fontInstance - the font to use to test the characters.
     *
     * @internal
     */
    CharSubstitutionFilter(const LEFontInstance *fontInstance);

    /**
     * The destructor.
     *
     * @internal
     */
    ~CharSubstitutionFilter();

    /**
     * This method is used to test if a particular
     * character can be displayed by the filter's
     * font.
     *
     * @param glyph - the Unicode character code to be tested
     *
     * @return TRUE if the filter's font can display this character.
     *
     * @internal
     */
    le_bool accept(LEGlyphID glyph) const;
};

U_NAMESPACE_END
#endif
Commit	Line	Data
374ca955 A	1	/*
	2	*
	3	* (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
	4	*
	5	*/
	6
	7	#ifndef __CHARSUBSTITUTIONFILTER_H
	8	#define __CHARSUBSTITUTIONFILTER_H
	9
	10	#include "LETypes.h"
	11	#include "LEGlyphFilter.h"
	12
	13	U_NAMESPACE_BEGIN
	14
	15	class LEFontInstance;
	16
	17	/**
	18	* This filter is used by character-based GSUB processors. It
	19	* accepts only those characters which the given font can display.
	20	*
	21	* @internal
	22	*/
	23	class CharSubstitutionFilter : public UMemory, public LEGlyphFilter
	24	{
	25	private:
	26	/**
	27	* Holds the font which is used to test the characters.
	28	*
	29	* @internal
	30	*/
	31	const LEFontInstance *fFontInstance;
	32
	33	/**
	34	* The copy constructor. Not allowed!
	35	*
	36	* @internal
	37	*/
	38	CharSubstitutionFilter(const CharSubstitutionFilter &other); // forbid copying of this class
	39
	40	/**
	41	* The replacement operator. Not allowed!
	42	*
	43	* @internal
	44	*/
	45	CharSubstitutionFilter &operator=(const CharSubstitutionFilter &other); // forbid copying of this class
	46
	47	public:
	48	/**
	49	* The constructor.
	50	*
	51	* @param fontInstance - the font to use to test the characters.
	52	*
	53	* @internal
	54	*/
	55	CharSubstitutionFilter(const LEFontInstance *fontInstance);
	56
	57	/**
	58	* The destructor.
	59	*
	60	* @internal
	61	*/
	62	~CharSubstitutionFilter();
	63
	64	/**
65	* This method is used to test if a particular
66	* character can be displayed by the filter's
67	* font.
68	*
69	* @param glyph - the Unicode character code to be tested
70	*
71	* @return TRUE if the filter's font can display this character.
72	*
73	* @internal
74	*/
75	le_bool accept(LEGlyphID glyph) const;
76	};
77
78	U_NAMESPACE_END
79	#endif
80
81