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1.1 root 1: /* $Header: TextDisp.h,v 1.1 87/09/11 07:59:23 toddb Exp $ */
2: /*
3: * sccsid: @(#)TextDisp.h 1.14 2/25/87
4: */
5:
6: /*
7: * Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
8: *
9: * All Rights Reserved
10: *
11: * Permission to use, copy, modify, and distribute this software and its
12: * documentation for any purpose and without fee is hereby granted,
13: * provided that the above copyright notice appear in all copies and that
14: * both that copyright notice and this permission notice appear in
15: * supporting documentation, and that the name of Digital Equipment
16: * Corporation not be used in advertising or publicity pertaining to
17: * distribution of the software without specific, written prior permission.
18: *
19: *
20: * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
21: * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
22: * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
23: * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
24: * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
25: * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
26: * SOFTWARE.
27: */
28:
29: /* File: TextDisp.h */
30:
31: #define MAXCUT 30000 /* Maximum number of characters that can be cut. */
32:
33: #define LF 0x0a
34: #define CR 0x0d
35: #define TAB 0x09
36: #define BS 0x08
37: #define SP 0x20
38: #define DEL 0x7f
39: #define BSLASH '\\'
40:
41: #define EDITDONE 0
42: #define EDITERROR 1
43: #define POSITIONERROR 2
44:
45: typedef enum {XtsdLeft, XtsdRight} ScanDirection;
46: typedef enum {XtstPositions, XtstWhiteSpace, XtstEOL, XtstParagraph, XtstFile} ScanType;
47:
48: typedef struct {
49: int firstPos;
50: int length;
51: char *ptr;
52: } XtTextBlock, *TextBlockPtr;
53:
54: typedef struct {
55: int (*read)();
56: int (*replace)();
57: XtTextPosition (*getLastPos)();
58: int (*setLastPos)();
59: XtTextPosition (*scan)();
60: XtEditType (*editType)();
61: int *data;
62: } XtTextSource, *TextSourcePtr;
63:
64: typedef struct {
65: Display *dpy;
66: int (*display)();
67: int (*insertCursor)();
68: int (*clearToBackground)();
69: int (*findPosition)();
70: int (*findDistance)();
71: int (*resolve)();
72: int (*maxLines)();
73: int (*maxHeight)();
74: int *data;
75: } XtTextSink, *TextSinkPtr;
76:
77: /* displayable text management data structures */
78:
79: typedef struct {
80: XtTextPosition position;
81: Position x, y, endX;
82: } LineTableEntry, *LineTableEntryPtr;
83:
84: /* Line Tables are n+1 long - last position displayed is in last lt entry */
85: typedef struct {
86: XtTextPosition top; /* Top of the displayed text. */
87: int lines; /* How many lines in this table. */
88: LineTableEntry *info; /* A dynamic array, one entry per line */
89: } LineTable, *LineTablePtr;
90:
91: typedef enum {XtisOn, XtisOff} InsertState;
92:
93: typedef enum {XtselectNull, XtselectPosition, XtselectChar, XtselectWord,
94: XtselectLine, XtselectParagraph, XtselectAll} XtSelectType;
95:
96: typedef enum {XtsmTextSelect, XtsmTextExtend} SelectionMode;
97:
98: typedef enum {XtactionStart, XtactionAdjust, XtactionEnd} SelectionAction;
99:
100: typedef struct {
101: XtTextPosition left, right;
102: XtSelectType type;
103: } TextSelection;
104:
105: #define IsPositionVisible(ctx, pos) (pos >= ctx->lt.info[0].position && \
106: pos <= ctx->lt.info[ctx->lt.lines].position)
107:
108: /* Private Text Definitions */
109:
110: typedef int (*ActionProc)();
111:
112: typedef XtSelectType SelectionArray[20];
113:
114: typedef struct {
115: Display *dpy;
116: XtTextSource *source;
117: XtTextSink *sink;
118: LineTable lt;
119: XtTextPosition insertPos;
120: TextSelection s;
121: ScanDirection extendDir;
122: TextSelection origSel; /* the selection being modified */
123: SelectionArray sarray; /* Array to cycle for selections. */
124: Dimension width, height; /* Dimensions of the text subwindow */
125: Dimension leftmargin; /* Width of left margin. */
126: int options; /* wordbreak, scroll, etc. */
127: unsigned short lasttime; /* timestamp of last processed action */
128: unsigned short time; /* timestamp of last key or button action */
129: Position x, y; /* x, y coords for key or button action */
130: Window sbar; /* The vertical scroll bar (none = 0). */
131: Window outer; /* Parent of scrollbar & text (if any) */
132: Window w; /* Actual window containing text. */
133: XtTextPosition *updateFrom; /* Array of start positions for update. */
134: XtTextPosition *updateTo; /* Array of end positions for update. */
135: int numranges; /* How many update ranges there are. */
136: int maxranges; /* How many update ranges we've space for */
137: Boolean showposition; /* True if we need to show the position. */
138: XtTextPosition lastPos; /* Last position of source. */
139: Window dialog; /* Window containing dialog, if any. */
140: Dimension borderWidth; /* width of window border (if any) */
141: XtEventsPtr eventTable; /* Table for translation mgr. */
142: caddr_t state; /* translation manager state handle */
143: Pixel border, background; /* window colors */
144: GC gc;
145: Boolean hasfocus; /* TRUE if we currently have input focus. */
146: } TextContext, *TextContextPtr;
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