1/*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.  Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26/*
27 *
28 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
29 *
30 */
31
32#ifndef __ARABICSHAPING_H
33#define __ARABICSHAPING_H
34
35/**
36 * \file
37 * \internal
38 */
39
40#include "LETypes.h"
41#include "OpenTypeTables.h"
42
43U_NAMESPACE_BEGIN
44
45class LEGlyphStorage;
46
47class ArabicShaping /* not : public UObject because all methods are static */ {
48public:
49    // Joining types
50    enum JoiningTypes
51    {
52        JT_NON_JOINING   = 0,
53        JT_JOIN_CAUSING  = 1,
54        JT_DUAL_JOINING  = 2,
55        JT_LEFT_JOINING  = 3,
56        JT_RIGHT_JOINING = 4,
57        JT_TRANSPARENT   = 5,
58        JT_COUNT         = 6
59    };
60
61    // shaping bit masks
62    enum ShapingBitMasks
63    {
64        MASK_SHAPE_RIGHT    = 1, // if this bit set, shapes to right
65        MASK_SHAPE_LEFT     = 2, // if this bit set, shapes to left
66        MASK_TRANSPARENT    = 4, // if this bit set, is transparent (ignore other bits)
67        MASK_NOSHAPE        = 8  // if this bit set, don't shape this char, i.e. tatweel
68    };
69
70    // shaping values
71    enum ShapeTypeValues
72    {
73        ST_NONE         = 0,
74        ST_RIGHT        = MASK_SHAPE_RIGHT,
75        ST_LEFT         = MASK_SHAPE_LEFT,
76        ST_DUAL         = MASK_SHAPE_RIGHT | MASK_SHAPE_LEFT,
77        ST_TRANSPARENT  = MASK_TRANSPARENT,
78        ST_NOSHAPE_DUAL = MASK_NOSHAPE | ST_DUAL,
79        ST_NOSHAPE_NONE = MASK_NOSHAPE
80    };
81
82    typedef le_int32 ShapeType;
83
84    static void shape(const LEUnicode *chars, le_int32 offset, le_int32 charCount, le_int32 charMax,
85                      le_bool rightToLeft, LEGlyphStorage &glyphStorage);
86
87    static const FeatureMap *getFeatureMap(le_int32 &count);
88
89private:
90    // forbid instantiation
91    ArabicShaping();
92
93    static ShapeType getShapeType(LEUnicode c);
94
95    static const le_uint8 shapingTypeTable[];
96    static const size_t   shapingTypeTableLen;
97
98    static const ShapeType shapeTypes[];
99
100    static void adjustTags(le_int32 outIndex, le_int32 shapeOffset, LEGlyphStorage &glyphStorage);
101};
102
103U_NAMESPACE_END
104#endif
105