Xw/DisplayP.h

   1 /*************************************<+>*************************************
   2  *****************************************************************************
   3  **
   4  **   File:        DisplayP.h
   5  **
   6  **   Project:     X Widgets
   7  **
   8  **   Description: Private include file for TextEdit widget ascii sink
   9  **
  10  *****************************************************************************
  11  **
  12  **   Copyright (c) 1988 by Hewlett-Packard Company
  13  **   Copyright (c) 1987, 1988 by Digital Equipment Corporation, Maynard,
  14  **             Massachusetts, and the Massachusetts Institute of Technology,
  15  **             Cambridge, Massachusetts
  16  **
  17  **   Permission to use, copy, modify, and distribute this software
  18  **   and its documentation for any purpose and without fee is hereby
  19  **   granted, provided that the above copyright notice appear in all
  20  **   copies and that both that copyright notice and this permission
  21  **   notice appear in supporting documentation, and that the names of
  22  **   Hewlett-Packard, Digital or  M.I.T.  not be used in advertising or
  23  **   publicity pertaining to distribution of the software without
  24  **   written prior permission.
  25  **
  26  **   DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  27  **   ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  28  **   DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  29  **   ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  30  **   WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  31  **   ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  32  **   SOFTWARE.
  33  **
  34  *****************************************************************************
  35  *************************************<+>*************************************/
  36
  37
  38 #ifndef _XwTextEditDisplayPrivate_h
  39 #define _XwTextEditDisplayPrivate_h
  40
  41 /*****************************************************************************
  42 *
  43 * Constants
  44 *
  45 *****************************************************************************/
  46
  47 #define INFINITE_WIDTH 32767
  48
  49 #define applyDisplay(method) (*(self->text.sink->method))
  50
  51 /*****************************************************************************
  52 *
  53 * Displayable text management data structures (LineTable)
  54 *
  55 *****************************************************************************/
  56
  57 #define RequiredCursorMargin 3
  58
  59 typedef struct {
  60     XwTextPosition      position, drawPos;
  61     Position            x, y, endX;
  62     TextFit             fit ;
  63     } XwLineTableEntry, *XwLineTableEntryPtr;
  64
  65 /* Line Tables are n+1 long - last position displayed is in last lt entry */
  66 typedef struct {
  67     XwTextPosition  top;        /* Top of the displayed text.           */
  68     XwTextPosition  lines;      /* How many lines in this table.        */
  69     XwLineTableEntry  *info;    /* A dynamic array, one entry per line  */
  70     } XwLineTable, *XwLineTablePtr;
  71
  72 typedef enum {XwisOn, XwisOff} XwInsertState;
  73
  74 typedef enum {XwselectNull, XwselectPosition, XwselectChar, XwselectWord,
  75     XwselectLine, XwselectParagraph, XwselectAll} XwSelectType;
  76
  77 typedef enum {XwsmTextSelect, XwsmTextExtend} XwSelectionMode;
  78
  79 typedef enum {XwactionStart, XwactionAdjust, XwactionEnd} XwSelectionAction;
  80
  81 typedef struct {
  82     XwTextPosition left, right;
  83     XwSelectType  type;
  84 } XwTextSelection;
  85
  86 #define IsPositionVisible(ctx, pos)\
  87   (pos >= ctx->text.lt.info[0].position && \
  88    pos <= ctx->text.lt.info[ctx->text.lt.lines].position)
  89
  90
  91 #endif
  92 /* DON'T ADD STUFF AFTER THIS #endif */
  93
  94