| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| /* |
| * |
| * (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. |
| * |
| * Note: Implementation is in ArabicLayoutEngine.cpp |
| * |
| * @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, LEErrorCode &success) const; |
| }; |
| |
| U_NAMESPACE_END |
| #endif |
| |
| |