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/*
* $Header: /var/lib/cvsd/repos/research/researchv9/X11/src/X.V11R1/lib/Xtk/TextP.h,v 1.1.1.1 2018/04/24 17:22:00 root Exp $
*/

/*
 * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
 * 
 *                         All Rights Reserved
 * 
 * Permission to use, copy, modify, and distribute this software and its 
 * documentation for any purpose and without fee is hereby granted, 
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in 
 * supporting documentation, and that the name of Digital Equipment
 * Corporation not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior permission.  
 * 
 * 
 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */
#ifndef _XtTextPrivate_h
#define _XtTextPrivate_h


/****************************************************************
 *
 * Text widget private
 *
 ****************************************************************/
#define MAXCUT	30000	/* Maximum number of characters that can be cut. */

#define LF	0x0a
#define CR	0x0d
#define TAB	0x09
#define BS	0x08
#define SP	0x20
#define DEL	0x7f
#define BSLASH	'\\'

#define EDITDONE 0
#define EDITERROR 1
#define POSITIONERROR 2

typedef enum {XtsdLeft, XtsdRight} ScanDirection;
typedef enum {XtstPositions, XtstWhiteSpace, XtstEOL, XtstParagraph, XtstFile} ScanType;

typedef struct {
    int  firstPos;
    int  length;
    char *ptr;
    } XtTextBlock, *TextBlockPtr;

/* the data field is really a pointer to source info, see disk and 
   stream sources in TextKinds.c */

typedef struct {
    int		    (*read)();
    int		    (*replace)();
    XtTextPosition  (*getLastPos)();
    int		    (*setLastPos)();
    XtTextPosition  (*scan)();
    XtEditType      (*editType)();
    int		    *data;       
    } XtTextSource, *TextSourcePtr;

typedef struct {
    XFontStruct *font;
    int foreground;
    int (*display)();
    int (*insertCursor)();
    int (*clearToBackground)();
    int (*findPosition)();
    int (*findDistance)();
    int (*resolve)();
    int (*maxLines)();
    int (*maxHeight)();
    int *data;
    } XtTextSink, *TextSinkPtr;

/* displayable text management data structures */

typedef struct {
    XtTextPosition position;
    Position x, y, endX;
    } LineTableEntry, *LineTableEntryPtr;

/* Line Tables are n+1 long - last position displayed is in last lt entry */
typedef struct {
    XtTextPosition  top;	/* Top of the displayed text.		*/
    int		    lines;	/* How many lines in this table.	*/
    LineTableEntry  *info;	/* A dynamic array, one entry per line  */
    } LineTable, *LineTablePtr;

typedef enum {XtisOn, XtisOff} InsertState;

typedef enum {XtselectNull, XtselectPosition, XtselectChar, XtselectWord,
    XtselectLine, XtselectParagraph, XtselectAll} XtSelectType;

typedef enum {XtsmTextSelect, XtsmTextExtend} SelectionMode;

typedef enum {XtactionStart, XtactionAdjust, XtactionEnd} SelectionAction;

typedef struct {
    XtTextPosition left, right;
    XtSelectType  type;
} TextSelection;

#define IsPositionVisible(ctx, pos)	(pos >= ctx->text.lt.info[0].position && \
	    pos <= ctx->text.lt.info[ctx->text.lt.lines].position)

/* Private Text Definitions */

typedef int (*ActionProc)();

typedef XtSelectType SelectionArray[20];

/* New fields for the Text widget class record */

typedef struct {int foo;} TextClassPart;

/* Full class record declaration */
typedef struct _TextClassRec {
    CoreClassPart	core_class;
    TextClassPart	text_class;
} TextClassRec;

extern TextClassRec textClassRec;

/* New fields for the Text widget record */
typedef struct {
    XtTextSource	*source;
    XtTextSink		*sink;
    LineTable       lt;
    XtTextPosition  insertPos;
    TextSelection   s;
    ScanDirection   extendDir;
    TextSelection   origSel;        /* the selection being modified */
    SelectionArray  sarray;         /* Array to cycle for selections. */
    Dimension       leftmargin;     /* Width of left margin. */
    int             options;        /* wordbreak, scroll, etc. */
    unsigned short  lasttime;       /* timestamp of last processed action */
    unsigned short  time;           /* timestamp of last key or button action */ 
    Position        ev_x, ev_y;     /* x, y coords for key or button action */
    Widget          sbar;           /* The vertical scroll bar (none = 0).  */
    Widget          outer;          /* Parent of scrollbar & text (if any) */
    XtTextPosition  *updateFrom;    /* Array of start positions for update. */
    XtTextPosition  *updateTo;      /* Array of end positions for update. */
    int             numranges;      /* How many update ranges there are. */
    int             maxranges;      /* How many update ranges we've space for */
    Boolean         showposition;   /* True if we need to show the position. */
    XtTextPosition  lastPos;        /* Last position of source. */
    Widget          dialog;         /* Window containing dialog, if any. */
    GC              gc;
    Boolean         hasfocus;   /* TRUE if we currently have input focus. */
} TextPart;

/****************************************************************
 *
 * Full instance record declaration
 *
 ****************************************************************/

typedef struct _TextRec {
    CorePart	core;
    TextPart	text;
} TextRec;


#endif _XtTextPrivate_h
/* DON'T ADD STUFF AFTER THIS #endif */

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