You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
175 lines
3.8 KiB
175 lines
3.8 KiB
/*
|
|
* Text Breaker & Bit stream break array class definition
|
|
*
|
|
* File: _txtbrk.h
|
|
* Create: Mar 29, 1998
|
|
* Author: Worachai Chaoweeraprasit (wchao)
|
|
*
|
|
* Copyright (c) 1998, Microsoft Corporation. All rights reserved.
|
|
*/
|
|
|
|
|
|
#ifndef _TXTBRK_H
|
|
#define _TXTBRK_H
|
|
|
|
// DEBUG definition
|
|
#ifdef BITVIEW
|
|
#define BVDEBUG _DEBUG
|
|
#define Assert ASSERT
|
|
#else
|
|
#define BVDEBUG DEBUG
|
|
#endif
|
|
|
|
|
|
// The number of buffer breaks before the sync point
|
|
#define CWORD_TILLSYNC 3 // Thai wordbreak engine is expected to be in sync within 3 words
|
|
#define CCLUSTER_TILLSYNC 1 // Indic cluster is normally in sync in within 1
|
|
|
|
// Abstract Data type
|
|
#define ITEM UINT
|
|
|
|
// CPU register size
|
|
//#define RSIZE (sizeof(ITEM)*8)
|
|
#define RSIZE 32
|
|
|
|
// Mask most/least significant <n> bits
|
|
#define MASK_LOW(u, n) ( ((ITEM)(u)) & (1<<(n))-1 )
|
|
#define MASK_HIGH(u, n) ~MASK_LOW(u, RSIZE-n)
|
|
|
|
// BreakArray Exit convention
|
|
#ifdef BVDEBUG
|
|
#define PUSH_STATE(x,y,z) PushState(x,y,z)
|
|
#define VALIDATE(x) Validate(x)
|
|
#else
|
|
#define PUSH_STATE(x,y,z)
|
|
#define VALIDATE(x) x
|
|
#endif
|
|
|
|
// Who put the state?
|
|
#define INSERTER 0
|
|
#define REMOVER 1
|
|
#define COLLAPSER 2
|
|
#define REPLACER 3
|
|
|
|
|
|
#ifdef BVDEBUG
|
|
typedef struct {
|
|
LONG who;
|
|
LONG ibGap;
|
|
LONG cbGap;
|
|
LONG cbBreak;
|
|
LONG cbSize;
|
|
LONG cp;
|
|
LONG cch;
|
|
} BVSTATE;
|
|
#endif
|
|
|
|
class CBreakArray : public CArray<ITEM>
|
|
{
|
|
public:
|
|
#ifdef BITVIEW
|
|
friend class CBitView;
|
|
#endif
|
|
|
|
CBreakArray();
|
|
~CBreakArray() {}
|
|
|
|
BOOL IsValid() const { return Count() > 0; }
|
|
void CheckArray();
|
|
|
|
LONG InsertBreak (LONG cp, LONG cch);
|
|
LONG RemoveBreak (LONG cp, LONG cch);
|
|
LONG ReplaceBreak (LONG cp, LONG cchOld, LONG cchNew);
|
|
void ClearBreak (LONG cp, LONG cch);
|
|
void SetBreak (LONG cp, BOOL fOn);
|
|
BOOL GetBreak (LONG cp);
|
|
|
|
LONG CollapseGap (void);
|
|
private:
|
|
|
|
// n-Bits shifting methods
|
|
void ShUp (LONG iel, LONG cel, LONG n);
|
|
void ShDn (LONG iel, LONG cel, LONG n);
|
|
|
|
// Size (in bits)
|
|
LONG _ibGap; // offset from start of array to gap
|
|
LONG _cbGap; // gap size
|
|
LONG _cbBreak; // number of valid break
|
|
LONG _cbSize; // bit array size (excluded the sentinel element)
|
|
#ifdef BITVIEW
|
|
LONG _cCollapse; // how many time collapse?
|
|
#endif
|
|
|
|
public:
|
|
LONG GetCchBreak() { return _cbBreak; }
|
|
#ifdef BVDEBUG
|
|
LONG GetCbSize() { return _cbSize; }
|
|
LONG Validate(LONG cchRet);
|
|
void PushState(LONG cp, LONG cch, LONG who);
|
|
#endif
|
|
#ifdef BITVIEW
|
|
LONG SetCollapseCount();
|
|
#endif
|
|
|
|
protected:
|
|
#ifdef BVDEBUG
|
|
BVSTATE _s;
|
|
#endif
|
|
LONG AddBreak(LONG cp, LONG cch);
|
|
};
|
|
|
|
|
|
#ifndef BITVIEW
|
|
|
|
|
|
/////// Complex script text breaker class
|
|
//
|
|
// The engine to handle cluster and (dictionary-based) word breaking method
|
|
// used by most SouthEast Asian languages such as Thai, Lao, Burmese etc.
|
|
//
|
|
// Create: Mar 12, 1998
|
|
//
|
|
|
|
enum BREAK_UNIT
|
|
{
|
|
BRK_WORD = 1,
|
|
BRK_CLUSTER = 2,
|
|
BRK_BOTH = 3
|
|
};
|
|
|
|
class CTxtBreaker : public ITxNotify
|
|
{
|
|
public:
|
|
CTxtBreaker(CTxtEdit *ped);
|
|
~CTxtBreaker();
|
|
|
|
// Breaker allocation
|
|
BOOL AddBreaker(UINT brkUnit);
|
|
|
|
// Breaker refreshing
|
|
void Refresh();
|
|
|
|
// Query methods
|
|
#ifndef NOCOMPLEXSCRIPTS
|
|
BOOL CanBreakCp (BREAK_UNIT brk, LONG cp);
|
|
#else
|
|
BOOL CanBreakCp (BREAK_UNIT brk, LONG cp) { return FALSE; }
|
|
#endif
|
|
|
|
// ITxNotify methods
|
|
|
|
virtual void OnPreReplaceRange (LONG cp, LONG cchDel, LONG cchNew,
|
|
LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData);
|
|
virtual void OnPostReplaceRange (LONG cp, LONG cchDel, LONG cchNew,
|
|
LONG cpFormatMin, LONG cpFormatMax, NOTIFY_DATA *pNotifyData);
|
|
virtual void Zombie() {};
|
|
|
|
private:
|
|
CTxtEdit* _ped;
|
|
CBreakArray* _pbrkWord; // word-break array (per codepoint property)
|
|
CBreakArray* _pbrkChar; // cluster-break array (per codepoint property)
|
|
};
|
|
|
|
#endif // !BITVIEW
|
|
|
|
#endif // _TXTBRK_H
|