|
sl@0
|
1 |
/*
|
|
sl@0
|
2 |
*
|
|
sl@0
|
3 |
* (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
|
|
sl@0
|
4 |
*
|
|
sl@0
|
5 |
*/
|
|
sl@0
|
6 |
|
|
sl@0
|
7 |
#ifndef __THAISHAPING_H
|
|
sl@0
|
8 |
#define __THAISHAPING_H
|
|
sl@0
|
9 |
|
|
sl@0
|
10 |
/**
|
|
sl@0
|
11 |
* \file
|
|
sl@0
|
12 |
* \internal
|
|
sl@0
|
13 |
*/
|
|
sl@0
|
14 |
|
|
sl@0
|
15 |
#include "LETypes.h"
|
|
sl@0
|
16 |
#include "LEGlyphFilter.h"
|
|
sl@0
|
17 |
#include "OpenTypeTables.h"
|
|
sl@0
|
18 |
|
|
sl@0
|
19 |
U_NAMESPACE_BEGIN
|
|
sl@0
|
20 |
|
|
sl@0
|
21 |
class LEGlyphStorage;
|
|
sl@0
|
22 |
|
|
sl@0
|
23 |
class ThaiShaping /* not : public UObject because all methods are static */ {
|
|
sl@0
|
24 |
public:
|
|
sl@0
|
25 |
|
|
sl@0
|
26 |
enum {
|
|
sl@0
|
27 |
// Character classes
|
|
sl@0
|
28 |
NON = 0,
|
|
sl@0
|
29 |
CON = 1,
|
|
sl@0
|
30 |
COA = 2,
|
|
sl@0
|
31 |
COD = 3,
|
|
sl@0
|
32 |
LVO = 4,
|
|
sl@0
|
33 |
FV1 = 5,
|
|
sl@0
|
34 |
FV2 = 6,
|
|
sl@0
|
35 |
FV3 = 7,
|
|
sl@0
|
36 |
BV1 = 8,
|
|
sl@0
|
37 |
BV2 = 9,
|
|
sl@0
|
38 |
BDI = 10,
|
|
sl@0
|
39 |
TON = 11,
|
|
sl@0
|
40 |
AD1 = 12,
|
|
sl@0
|
41 |
AD2 = 13,
|
|
sl@0
|
42 |
AD3 = 14,
|
|
sl@0
|
43 |
NIK = 15,
|
|
sl@0
|
44 |
AV1 = 16,
|
|
sl@0
|
45 |
AV2 = 17,
|
|
sl@0
|
46 |
AV3 = 18,
|
|
sl@0
|
47 |
classCount = 19,
|
|
sl@0
|
48 |
|
|
sl@0
|
49 |
// State Transition actions
|
|
sl@0
|
50 |
tA = 0,
|
|
sl@0
|
51 |
tC = 1,
|
|
sl@0
|
52 |
tD = 2,
|
|
sl@0
|
53 |
tE = 3,
|
|
sl@0
|
54 |
tF = 4,
|
|
sl@0
|
55 |
tG = 5,
|
|
sl@0
|
56 |
tH = 6,
|
|
sl@0
|
57 |
tR = 7,
|
|
sl@0
|
58 |
tS = 8
|
|
sl@0
|
59 |
};
|
|
sl@0
|
60 |
|
|
sl@0
|
61 |
struct StateTransition
|
|
sl@0
|
62 |
{
|
|
sl@0
|
63 |
le_uint8 nextState;
|
|
sl@0
|
64 |
le_uint8 action;
|
|
sl@0
|
65 |
|
|
sl@0
|
66 |
le_uint8 getNextState() { return nextState; };
|
|
sl@0
|
67 |
le_uint8 getAction() { return action; };
|
|
sl@0
|
68 |
};
|
|
sl@0
|
69 |
|
|
sl@0
|
70 |
static le_int32 compose(const LEUnicode *input, le_int32 offset, le_int32 charCount, le_uint8 glyphSet,
|
|
sl@0
|
71 |
LEUnicode errorChar, LEUnicode *output, LEGlyphStorage &glyphStorage);
|
|
sl@0
|
72 |
|
|
sl@0
|
73 |
private:
|
|
sl@0
|
74 |
// forbid instantiation
|
|
sl@0
|
75 |
ThaiShaping();
|
|
sl@0
|
76 |
|
|
sl@0
|
77 |
static const le_uint8 classTable[];
|
|
sl@0
|
78 |
static const StateTransition thaiStateTable[][classCount];
|
|
sl@0
|
79 |
|
|
sl@0
|
80 |
inline static StateTransition getTransition(le_uint8 state, le_uint8 currClass);
|
|
sl@0
|
81 |
|
|
sl@0
|
82 |
static le_uint8 doTransition(StateTransition transition, LEUnicode currChar, le_int32 inputIndex, le_uint8 glyphSet,
|
|
sl@0
|
83 |
LEUnicode errorChar, LEUnicode *outputBuffer, LEGlyphStorage &glyphStorage, le_int32 &outputIndex);
|
|
sl@0
|
84 |
|
|
sl@0
|
85 |
static le_uint8 getNextState(LEUnicode ch, le_uint8 state, le_int32 inputIndex, le_uint8 glyphSet, LEUnicode errorChar,
|
|
sl@0
|
86 |
le_uint8 &charClass, LEUnicode *output, LEGlyphStorage &glyphStorage, le_int32 &outputIndex);
|
|
sl@0
|
87 |
|
|
sl@0
|
88 |
static le_bool isLegalHere(LEUnicode ch, le_uint8 prevState);
|
|
sl@0
|
89 |
static le_uint8 getCharClass(LEUnicode ch);
|
|
sl@0
|
90 |
|
|
sl@0
|
91 |
static LEUnicode noDescenderCOD(LEUnicode cod, le_uint8 glyphSet);
|
|
sl@0
|
92 |
static LEUnicode leftAboveVowel(LEUnicode vowel, le_uint8 glyphSet);
|
|
sl@0
|
93 |
static LEUnicode lowerBelowVowel(LEUnicode vowel, le_uint8 glyphSet);
|
|
sl@0
|
94 |
static LEUnicode lowerRightTone(LEUnicode tone, le_uint8 glyphSet);
|
|
sl@0
|
95 |
static LEUnicode lowerLeftTone(LEUnicode tone, le_uint8 glyphSet);
|
|
sl@0
|
96 |
static LEUnicode upperLeftTone(LEUnicode tone, le_uint8 glyphSet);
|
|
sl@0
|
97 |
|
|
sl@0
|
98 |
};
|
|
sl@0
|
99 |
|
|
sl@0
|
100 |
inline ThaiShaping::StateTransition ThaiShaping::getTransition(le_uint8 state, le_uint8 currClass)
|
|
sl@0
|
101 |
{
|
|
sl@0
|
102 |
return thaiStateTable[state][currClass];
|
|
sl@0
|
103 |
}
|
|
sl@0
|
104 |
|
|
sl@0
|
105 |
U_NAMESPACE_END
|
|
sl@0
|
106 |
#endif
|
|
sl@0
|
107 |
|
|
sl@0
|
108 |
|