347 lines
7.7 KiB
C
347 lines
7.7 KiB
C
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/*
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* Uniscribe interface (& related classes) class definition
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*
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* File: _uspi.h
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* Create: Jan 10, 1998
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* Author: Worachai Chaoweeraprasit (wchao)
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*
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* Copyright (c) 1998, Microsoft Corporation. All rights reserved.
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*/
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#ifndef NOCOMPLEXSCRIPTS
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#ifndef _USPI_H
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#define _USPI_H
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#include "_ls.h"
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#include "usp10.h" // Uniscribe SDK protocol
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// classes
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//
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class CFormatRunPtr;
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class CMeasurer;
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class CTxtEdit;
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class CUniscribe;
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class CBiDiFSM;
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class CTxtBreaker;
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#define ALIGN(x) (int)(((x)+3) & ~3) // dword aligning
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#define GLYPH_COUNT(c) ((((c)*3)/2)+16)
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#define MAX_CLIENT_BUF 512 // size (in byte) of internal buffer
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// USP client parameters block
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//
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#define cli_string 0x00000001
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#define cli_psi 0x00000002
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#define cli_psla 0x00000004
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#define cli_pwgi 0x00000008
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#define cli_psva 0x00000010
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#define cli_pcluster 0x00000020
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#define cli_pidx 0x00000040
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#define cli_pgoffset 0x00000080
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#define cli_Itemize (cli_string | cli_psi)
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#define cli_Break (cli_psla)
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#define cli_Shape (cli_pwgi | cli_psva | cli_pcluster)
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#define cli_Place (cli_pidx | cli_pgoffset)
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#define cli_ShapePlace (cli_Shape | cli_Place)
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#ifndef LOCALE_SNATIVEDIGITS
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#define LOCALE_SNATIVEDIGITS 0x00000013
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#endif
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///// LANG
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//
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// The following defines are temporary - they will be removed once they
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// have been added to the standard NLS header files.
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#ifndef LANG_KHMER
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#define LANG_KHMER 0x53 // Cambodia
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#endif
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#ifndef LANG_LAO
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#define LANG_LAO 0x54 // Lao
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#endif
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#ifndef LANG_MONGOLIAN
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#define LANG_MONGOLIAN 0x50 // Mongolia
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#endif
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#ifndef LANG_TIBETAN
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#define LANG_TIBETAN 0x51 // Tibet
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#endif
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#ifndef LANG_URDU
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#define LANG_URDU 0x20 // India / Pakistan
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#endif
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//
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// Memory block will contain USPCLIENT -the table of ptrs, as a memory block's header
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// followed by subtables then requested data blocks. All things tie together as a
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// contiguous data area so client can free the whole thing in one shot.
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//
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// SI subtable
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//
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typedef struct tagUSP_CLIENT_SI
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{
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//
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// ScriptItemize's
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//
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WCHAR* pwchString;
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int cchString;
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SCRIPT_ITEM* psi;
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} USP_CLIENT_SI, *PUSP_CLIENT_SI;
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// SB subtable
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//
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typedef struct tagUSP_CLIENT_SB
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{
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//
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// ScriptBreak's
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//
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SCRIPT_LOGATTR* psla;
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} USP_CLIENT_SB, *PUSP_CLIENT_SB;
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// SS & SP subtable
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typedef struct tagUSP_CLIENT_SSP
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{
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//
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// ScriptShape's
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//
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WORD* pwgi;
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WORD* pcluster;
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SCRIPT_VISATTR* psva;
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//
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// ScriptPlace's
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//
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int* pidx;
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GOFFSET* pgoffset;
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} USP_CLIENT_SSP, *PUSP_CLIENT_SSP;
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// header (root) table
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//
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typedef struct tagUSP_CLIENT
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{
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PUSP_CLIENT_SI si;
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PUSP_CLIENT_SB sb;
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PUSP_CLIENT_SSP ssp;
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} USP_CLIENT, *PUSP_CLIENT;
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// buffer request structure
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//
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typedef struct tagBUF_REQ
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{
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int size; // size of requested element
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int c; // count of requested element
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PVOID* ppv; // ref to ptr of requested buffer
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} BUF_REQ;
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typedef enum
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{
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DIGITS_NOTIMPL = 0,
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DIGITS_CTX,
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DIGITS_NONE,
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DIGITS_NATIONAL
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} DIGITSHAPE;
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#define IsCS(x) (BOOL)((x)==U_COMMA || (x)==U_PERIOD || (x)==U_COLON)
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// CUniscribe's internal buffer request flag
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//
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#define igb_Glyph 1
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#define igb_VisAttr 2
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#define igb_Pidx 4
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// LS Callback's static return buffer
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#define celAdvance 32
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class CBufferBase
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{
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public:
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CBufferBase(int cbElem) { _cbElem = cbElem; }
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void* GetPtr(int cel);
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void Release();
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protected:
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void* _p;
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int _cElem;
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int _cbElem;
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};
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template <class ELEM>
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class CBuffer : public CBufferBase
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{
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public:
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CBuffer() : CBufferBase(sizeof(ELEM)) {}
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~CBuffer() { Release(); }
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ELEM* Get(int cel) { return (ELEM*)GetPtr(cel); }
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};
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/////// Uniscribe interface object class
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//
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//
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BOOL IsSupportedOS();
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class CUniscribe
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{
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public:
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CUniscribe();
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~CUniscribe();
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WORD ApplyDigitSubstitution (BYTE bDigitSubstMode);
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// public helper functions
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//
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const SCRIPT_PROPERTIES* GeteProp (WORD eScript);
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const CBiDiFSM* GetFSM ();
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BOOL CreateClientStruc (BYTE* pbBufIn, LONG cbBufIn, PUSP_CLIENT* ppc, LONG cchString, DWORD dwMask);
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void SubstituteDigitShaper (PLSRUN plsrun, CMeasurer* pme);
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inline BOOL CacheAllocGlyphBuffers(int cch, int& cGlyphs, WORD*& pwgi, SCRIPT_VISATTR*& psva)
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{
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cGlyphs = GLYPH_COUNT(cch);
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return (pwgi = GetGlyphBuffer(cGlyphs)) && (psva = GetVABuffer(cGlyphs));
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}
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inline BOOL IsValid() {return TRUE;}
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BOOL GetComplexCharRep(const SCRIPT_PROPERTIES* psp, BYTE iCharRepDefault, BYTE& iCharRepOut);
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BYTE GetRtlCharRep(CTxtEdit* ped, CRchTxtPtr* prtp);
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// higher level services
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//
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int ItemizeString (USP_CLIENT* pc, WORD uInitLevel, int* pcItems, WCHAR* pwchString, int cch,
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BOOL fUnicodeBidi, WORD wLangId = LANG_NEUTRAL);
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int ShapeString (PLSRUN plsrun, SCRIPT_ANALYSIS* psa, CMeasurer* pme, const WCHAR* pwch, int cch,
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WORD*& pwgi, WORD* pwlc, SCRIPT_VISATTR*& psva);
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int PlaceString (PLSRUN plsrun, SCRIPT_ANALYSIS* psa, CMeasurer* pme, const WORD* pcwgi, int cgi,
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const SCRIPT_VISATTR* psva, int* pgdx, GOFFSET* pgduv, ABC* pABC);
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int PlaceMetafileString (PLSRUN plsrun, CMeasurer* pme, const WCHAR* pwch, int cch, PINT* ppiDx);
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private:
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// private helper functions
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//
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HDC PrepareShapeDC (PLSRUN plsrun, CMeasurer* pme, HRESULT hrReq, HFONT& hOrgFont);
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BYTE GetCDMCharRep(BYTE iCharRepDefault);
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DWORD GetNationalDigitLanguage(LCID lcid);
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// get callback static buffers
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//
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SCRIPT_VISATTR* GetVABuffer(int cel) { return _rgva.Get(cel); }
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WORD* GetGlyphBuffer(int cel) { return _rgglyph.Get(cel); }
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int* GetWidthBuffer(int cel) { return _rgwidth.Get(cel); }
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GOFFSET* GetGoffsetBuffer(int cel) { return _rgGoffset.Get(cel); }
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// LS callback (static) buffers
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//
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CBuffer<WORD> _rgglyph;
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CBuffer<int> _rgwidth;
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CBuffer<GOFFSET> _rgGoffset;
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CBuffer<SCRIPT_VISATTR> _rgva;
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// pointer to BidiLevel Finite State Machine
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CBiDiFSM* _pFSM;
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// pointer to script properties resource table
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const SCRIPT_PROPERTIES** _ppProp;
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WORD _wesNationalDigit; // National digit script ID
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BYTE _iCharRepRtl; // Right to left char rep to use
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BYTE _iCharRepCDM; // CDM char repertoire to use
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};
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extern CUniscribe* g_pusp;
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extern int g_cMaxScript; // Maximum number of script produced by Uniscribe
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// Virtual script ID
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#define SCRIPT_MAX_COUNT ((WORD)g_cMaxScript)
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#define SCRIPT_WHITE SCRIPT_MAX_COUNT + 1
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/////// Bidi Finite State Machine class
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//
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// (detail: bidifsm2.html)
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//
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// Revise: 12-28-98 (wchao)
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//
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// inputs class:
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#define NUM_FSM_INPUTS 5
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typedef enum
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{
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chLTR = 0,
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chRTL,
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digitLTR,
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digitRTL,
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chGround // Neutralize current level down to initial level
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} INPUT_CLASS;
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// states:
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#define NUM_FSM_STATES 6
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typedef enum
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{
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S_A = 0,
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S_B,
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S_C,
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S_X,
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S_Y,
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S_Z
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} STATES;
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class CBiDiFSMCell
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{
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public:
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CBiDiLevel _level; // BiDi level
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USHORT _uNext; // Offset to the next state relative to FSM start
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};
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class CBiDiFSM
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{
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public:
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CBiDiFSM (CUniscribe* pusp) { _pusp = pusp; }
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~CBiDiFSM ();
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BOOL Init (void);
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INPUT_CLASS InputClass (const CCharFormat* pcCF, CTxtPtr* ptp, LONG cchRun) const;
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HRESULT RunFSM (CRchTxtPtr* prtp, LONG cRuns, LONG cRunsStart, BYTE bBaseLevel) const;
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inline void SetFSMCell (CBiDiFSMCell* pCell, CBiDiLevel* pLevel, USHORT uNext)
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{
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pCell->_level = *pLevel;
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pCell->_uNext = uNext;
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}
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private:
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short _nState; // number of state
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short _nInput; // number of input class
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CUniscribe* _pusp; // Uniscribe obj associated with
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CBiDiFSMCell* _pStart; // start FSM
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};
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#endif // _USPI_H
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#endif // NOCOMPLEXSCRIPTS
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