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.
287 lines
9.4 KiB
287 lines
9.4 KiB
/*
|
|
* @doc INTERNAL
|
|
*
|
|
* @module _DOC.H CTxtStory declaration |
|
|
*
|
|
* Purpose:
|
|
* Encapsulate the plain-text document data (text blocks, cchText)
|
|
*
|
|
* Original Authors: <nl>
|
|
* Christian Fortini <nl>
|
|
* Murray Sargent <nl>
|
|
*
|
|
* History: <nl>
|
|
* 6/25/95 alexgo commented and cleaned up
|
|
*
|
|
*/
|
|
|
|
#ifndef _DOC_H
|
|
#define _DOC_H
|
|
|
|
#include "_array.h"
|
|
|
|
#define cbBlockCombine CbOfCch(3072)
|
|
#define cbBlockMost CbOfCch(49152)
|
|
#define cbBlockInitial CbOfCch(4096)
|
|
#define cchGapInitial 128
|
|
#define cchBlkCombmGapI (CchOfCb(cbBlockCombine) - cchGapInitial)
|
|
#define cchBlkInitmGapI (CchOfCb(cbBlockInitial) - cchGapInitial)
|
|
|
|
#define cchBlkInsertmGapI (CchOfCb(cbBlockInitial)*5 - cchGapInitial)
|
|
|
|
class CDisplay;
|
|
class CTxtPtr;
|
|
class CTxtArray;
|
|
|
|
/*
|
|
* CTxtRun
|
|
*
|
|
* @class Formalizes a run of text. A range of text with same attribute,
|
|
* (see CFmtDesc) or within the same line (see CLine), etc. Runs are kept
|
|
* in arrays (see CArray) and are pointed to by CRunPtr's of various kinds.
|
|
* In general the character position of a run is computed by summing the
|
|
* length of all preceding runs, altho it may be possible to start from
|
|
* some other cp, e.g., for CLines, from CDisplay::_cpFirstVisible.
|
|
*/
|
|
|
|
class CTxtRun
|
|
{
|
|
//@access Public Methods and Data
|
|
public:
|
|
CTxtRun() {_cch = 0;} //@cmember Constructor
|
|
LONG _cch; //@cmember Count of characters in run
|
|
};
|
|
|
|
/*
|
|
* CTxtBlk
|
|
*
|
|
* @class A text block; a chunk of UNICODE text with a buffer gap to allow
|
|
* for easy insertions and deletions.
|
|
*
|
|
* @base protected | CTxtRun
|
|
*
|
|
* @devnote A text block may have four states: <nl>
|
|
* NULL: No data allocated for the block <nl>
|
|
* <md CTxtBlk::_pch> == NULL <nl>
|
|
* <md CTxtRun::_cch> == 0 <nl>
|
|
* <md CTxtBlk::_ibGap> == 0 <nl>
|
|
* <md CTxtBlk::_cbBlock> == 0 <nl>
|
|
*
|
|
* empty: All of the available space is a buffer gap <nl>
|
|
* <md CTxtBlk::_pch> != NULL <nl>
|
|
* <md CTxtRun::_cch> == 0 <nl>
|
|
* <md CTxtBlk::_ibGap> == 0 <nl>
|
|
* <md CTxtBlk::_cbBlock> <gt>= 0 <nl>
|
|
*
|
|
* normal: There is both data and a buffer gap <nl>
|
|
* <md CTxtBlk::_pch> != NULL <nl>
|
|
* <md CTxtRun::_cch> != 0 <nl>
|
|
* <md CTxtBlk::_ibGap> != 0 <nl>
|
|
* <md CTxtBlk::_cbBlock> <gt>= 0 <nl>
|
|
*
|
|
* full: The buffer gap is of zero size <nl>
|
|
* <md CTxtBlk::_pch> != NULL <nl>
|
|
* <md CTxtRun::_cch> <gt>= 0 <nl>
|
|
* <md CTxtBlk::_ibGap> <gt> 0 <nl>
|
|
* <md CTxtBlk::_cbBlock> == _cch * sizeof(WCHAR) <nl>
|
|
*
|
|
* The position of the buffer gap is given by _ibGap. With _cch and _cbBlock,
|
|
* it's possible to figure out the *size* of the gap by simply calculating:
|
|
* <nl>
|
|
* size = _cbBlock - (_cch * sizeof(character))
|
|
*
|
|
*/
|
|
|
|
class CTxtBlk : public CTxtRun
|
|
{
|
|
friend class CTxtPtr;
|
|
friend class CTxtArray;
|
|
|
|
//@access Protected Methods
|
|
protected:
|
|
//@cmember Constructor
|
|
CTxtBlk() {InitBlock(0);}
|
|
//@cmember Destructor
|
|
~CTxtBlk() {FreeBlock();}
|
|
|
|
//@cmember Initializes the block to the
|
|
//# of bytes given by <p cb>
|
|
BOOL InitBlock(LONG cb);
|
|
//@cmember Sets a block to the NULL state
|
|
VOID FreeBlock();
|
|
//@cmember Moves the buffer gap in a
|
|
//block
|
|
VOID MoveGap(LONG ichGap);
|
|
//@cmember Resizes a block to <p cbNew>
|
|
//bytes
|
|
BOOL ResizeBlock(LONG cbNew);
|
|
|
|
//@access Private Data
|
|
private:
|
|
//@cmember Pointer to the text data
|
|
WCHAR *_pch;
|
|
//@cmember BYTE offset of the gap
|
|
LONG _ibGap;
|
|
//@cmember size of the block in bytes
|
|
LONG _cbBlock;
|
|
};
|
|
|
|
|
|
/*
|
|
* CTxtArray
|
|
*
|
|
* @class A dynamic array of <c CTxtBlk> classes
|
|
*
|
|
* @base public | CArray<lt>CTxtBlk<gt>
|
|
*/
|
|
class CTxtArray : public CArray<CTxtBlk>
|
|
{
|
|
friend class CTxtPtr;
|
|
friend class CTxtStory;
|
|
|
|
//@access Public methods
|
|
public:
|
|
#ifdef DEBUG
|
|
//@cmember Invariant support
|
|
BOOL Invariant() const;
|
|
#endif // DEBUG
|
|
//@cmember Constructor
|
|
CTxtArray();
|
|
//@cmember Destructor
|
|
~CTxtArray();
|
|
//@cmember Gets the total number of
|
|
//characters in the array.
|
|
LONG CalcTextLength() const;
|
|
|
|
// Get access to cached CCharFormat and CParaFormat structures
|
|
const CCharFormat* GetCharFormat(LONG iCF);
|
|
const CParaFormat* GetParaFormat(LONG iPF);
|
|
|
|
LONG Get_iCF() {return _iCF;}
|
|
LONG Get_iPF() {return _iPF;}
|
|
void Set_iCF(LONG iCF) {_iCF = (SHORT)iCF;}
|
|
void Set_iPF(LONG iPF) {_iPF = (SHORT)iPF;}
|
|
|
|
//@access Private methods
|
|
private:
|
|
//@cmember Adds cb blocks
|
|
BOOL AddBlock(LONG itbNew, LONG cb);
|
|
//@cmember Removes ctbDel blocks
|
|
void RemoveBlocks(LONG itbFirst, LONG ctbDel);
|
|
//@cmember Combines blocks adjacent to itb
|
|
void CombineBlocks(LONG itb);
|
|
//@cmember Splits a block
|
|
BOOL SplitBlock(LONG itb, LONG ichSplit, LONG cchFirst,
|
|
LONG cchLast, BOOL fStreaming);
|
|
//@cmember Shrinks all blocks to minimal
|
|
// size
|
|
void ShrinkBlocks();
|
|
//@cmember Copies chunk of text into
|
|
// location given
|
|
LONG GetChunk(TCHAR **ppch, LONG cch, TCHAR *pchChunk, LONG cchCopy) const;
|
|
|
|
LONG _cchText; //@cmember Total text character count
|
|
SHORT _iCF; //@cmember Default CCharFormat index
|
|
SHORT _iPF;
|
|
};
|
|
|
|
|
|
class CBiDiLevel
|
|
{
|
|
public:
|
|
BOOL operator == (const CBiDiLevel& level) const
|
|
{
|
|
return _value == level._value && _fStart == level._fStart;
|
|
}
|
|
BOOL operator != (const CBiDiLevel& level) const
|
|
{
|
|
return _value != level._value || _fStart != level._fStart;
|
|
}
|
|
|
|
BYTE _value; // embedding level (0..15)
|
|
BYTE _fStart :1; // start a new level e.g. "{{abc}{123}}"
|
|
};
|
|
|
|
/*
|
|
* CFormatRun
|
|
*
|
|
* @class A run of like formatted text, where the format is indicated by an
|
|
* and index into a format table
|
|
*
|
|
* @base protected | CTxtRun
|
|
*/
|
|
class CFormatRun : public CTxtRun
|
|
{
|
|
//@access Public Methods
|
|
public:
|
|
friend class CFormatRunPtr;
|
|
friend class CTxtRange;
|
|
friend class CRchTxtPtr;
|
|
|
|
BOOL SameFormat(CFormatRun* pRun)
|
|
{
|
|
return _iFormat == pRun->_iFormat &&
|
|
_level._value == pRun->_level._value &&
|
|
_level._fStart == pRun->_level._fStart;
|
|
}
|
|
|
|
short _iFormat; //@cmember index of CHARFORMAT/PARAFORMAT struct
|
|
CBiDiLevel _level; //@cmember BiDi level
|
|
};
|
|
|
|
//@type CFormatRuns | An array of CFormatRun classes
|
|
typedef CArray<CFormatRun> CFormatRuns;
|
|
|
|
|
|
/*
|
|
* CTxtStory
|
|
*
|
|
* @class
|
|
* The text "Document". Maintains the state information related to the
|
|
* actual data of a document (such as text, formatting information, etc.)
|
|
*/
|
|
|
|
class CTxtStory
|
|
{
|
|
friend class CTxtPtr;
|
|
friend class CRchTxtPtr;
|
|
friend class CReplaceFormattingAE;
|
|
|
|
//@access Public Methods
|
|
public:
|
|
CTxtStory(); //@cmember Constructor
|
|
~CTxtStory(); //@cmember Destructor
|
|
|
|
//@cmember Get total text length
|
|
LONG GetTextLength() const
|
|
{return _TxtArray._cchText;}
|
|
|
|
//@cmember Get Paragraph Formatting runs
|
|
CFormatRuns *GetPFRuns() {return _pPFRuns;}
|
|
//@cmember Get Character Formatting runs
|
|
CFormatRuns *GetCFRuns() {return _pCFRuns;}
|
|
|
|
void DeleteFormatRuns(); //@cmember Converts to plain text from rich
|
|
|
|
const CCharFormat* GetCharFormat(LONG iCF)
|
|
{return _TxtArray.GetCharFormat(iCF);}
|
|
const CParaFormat* GetParaFormat(LONG iPF)
|
|
{return _TxtArray.GetParaFormat(iPF);}
|
|
|
|
LONG Get_iCF() {return _TxtArray.Get_iCF();}
|
|
LONG Get_iPF() {return _TxtArray.Get_iPF();}
|
|
void Set_iCF(LONG iCF) {_TxtArray.Set_iCF(iCF);}
|
|
void Set_iPF(LONG iPF) {_TxtArray.Set_iPF(iPF);}
|
|
|
|
#ifdef DEBUG
|
|
void DbgDumpStory(void); // Debug story dump member
|
|
#endif
|
|
|
|
//@access Private Data
|
|
private:
|
|
CTxtArray _TxtArray; //@cmember Plain-text runs
|
|
CFormatRuns * _pCFRuns; //@cmember Ptr to Character-Formatting runs
|
|
CFormatRuns * _pPFRuns; //@cmember Ptr to Paragraph-Formatting runs
|
|
};
|
|
|
|
#endif // ifndef _DOC_H
|