1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/*
* $XConsortium: cursor.c,v 1.6 89/03/24 11:42:11 jim Exp $
*/
#ifndef lint
static char *rcsid_cursor_c = "$XConsortium: cursor.c,v 1.6 89/03/24 11:42:11 jim Exp $";
#endif /* lint */
#include <X11/copyright.h>
/*
* Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of Digital Equipment
* Corporation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
*
*
* DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/* cursor.c */
#ifndef lint
static char rcs_id[] = "$XConsortium: cursor.c,v 1.6 89/03/24 11:42:11 jim Exp $";
#endif /* lint */
#include <X11/Xlib.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include "ptyx.h"
extern void bcopy();
static void _CheckSelection(screen)
register TScreen *screen;
{
extern XtermWidget term; /* %%% gross */
if (screen->cur_row > screen->endHRow ||
(screen->cur_row == screen->endHRow &&
screen->cur_col >= screen->endHCol)) {}
else
DisownSelection(term);
}
/*
* Moves the cursor to the specified position, checking for bounds.
* (this includes scrolling regions)
* The origin is considered to be 0, 0 for this procedure.
*/
CursorSet(screen, row, col, flags)
register TScreen *screen;
register int row, col;
unsigned flags;
{
register int maxr;
col = (col < 0 ? 0 : col);
screen->cur_col = (col <= screen->max_col ? col : screen->max_col);
maxr = screen->max_row;
if (flags & ORIGIN) {
row += screen->top_marg;
maxr = screen->bot_marg;
}
row = (row < 0 ? 0 : row);
screen->cur_row = (row <= maxr ? row : maxr);
screen->do_wrap = 0;
_CheckSelection(screen);
}
/*
* moves the cursor left n, no wrap around
*/
CursorBack(screen, n)
register TScreen *screen;
int n;
{
register int i, j, k, rev;
extern XtermWidget term;
if((rev = (term->flags & (REVERSEWRAP | WRAPAROUND)) ==
(REVERSEWRAP | WRAPAROUND)) && screen->do_wrap)
n--;
if ((screen->cur_col -= n) < 0) {
if(rev) {
if((i = (j = screen->max_col + 1) * screen->cur_row +
screen->cur_col) < 0) {
k = j * (screen->max_row + 1);
i += ((-i) / k + 1) * k;
}
screen->cur_row = i / j;
screen->cur_col = i % j;
} else
screen->cur_col = 0;
}
screen->do_wrap = 0;
_CheckSelection(screen);
}
/*
* moves the cursor forward n, no wraparound
*/
CursorForward(screen, n)
register TScreen *screen;
int n;
{
screen->cur_col += n;
if (screen->cur_col > screen->max_col)
screen->cur_col = screen->max_col;
screen->do_wrap = 0;
_CheckSelection(screen);
}
/*
* moves the cursor down n, no scrolling.
* Won't pass bottom margin or bottom of screen.
*/
CursorDown(screen, n)
register TScreen *screen;
int n;
{
register int max;
max = (screen->cur_row > screen->bot_marg ?
screen->max_row : screen->bot_marg);
screen->cur_row += n;
if (screen->cur_row > max)
screen->cur_row = max;
screen->do_wrap = 0;
_CheckSelection(screen);
}
/*
* moves the cursor up n, no linestarving.
* Won't pass top margin or top of screen.
*/
CursorUp(screen, n)
register TScreen *screen;
int n;
{
register int min;
min = (screen->cur_row < screen->top_marg ?
0 : screen->top_marg);
screen->cur_row -= n;
if (screen->cur_row < min)
screen->cur_row = min;
screen->do_wrap = 0;
_CheckSelection(screen);
}
/*
* Moves cursor down amount lines, scrolls if necessary.
* Won't leave scrolling region. No carriage return.
*/
Index(screen, amount)
register TScreen *screen;
register int amount;
{
register int j;
/*
* indexing when below scrolling region is cursor down.
* if cursor high enough, no scrolling necessary.
*/
if (screen->cur_row > screen->bot_marg
|| screen->cur_row + amount <= screen->bot_marg) {
CursorDown(screen, amount);
return;
}
CursorDown(screen, j = screen->bot_marg - screen->cur_row);
Scroll(screen, amount - j);
}
/*
* Moves cursor up amount lines, reverse scrolls if necessary.
* Won't leave scrolling region. No carriage return.
*/
RevIndex(screen, amount)
register TScreen *screen;
register int amount;
{
/*
* reverse indexing when above scrolling region is cursor up.
* if cursor low enough, no reverse indexing needed
*/
if (screen->cur_row < screen->top_marg
|| screen->cur_row-amount >= screen->top_marg) {
CursorUp(screen, amount);
return;
}
RevScroll(screen, amount - (screen->cur_row - screen->top_marg));
CursorUp(screen, screen->cur_row - screen->top_marg);
}
/*
* Moves Cursor To First Column In Line
*/
CarriageReturn(screen)
register TScreen *screen;
{
screen->cur_col = 0;
screen->do_wrap = 0;
_CheckSelection(screen);
}
/*
* Save Cursor and Attributes
*/
CursorSave(term, sc)
register XtermWidget term;
register SavedCursor *sc;
{
register TScreen *screen = &term->screen;
sc->row = screen->cur_row;
sc->col = screen->cur_col;
sc->flags = term->flags;
sc->curgl = screen->curgl;
sc->curgr = screen->curgr;
bcopy(screen->gsets, sc->gsets, sizeof(screen->gsets));
}
/*
* Restore Cursor and Attributes
*/
CursorRestore(term, sc)
register XtermWidget term;
register SavedCursor *sc;
{
register TScreen *screen = &term->screen;
bcopy(sc->gsets, screen->gsets, sizeof(screen->gsets));
screen->curgl = sc->curgl;
screen->curgr = sc->curgr;
term->flags &= ~(BOLD|INVERSE|UNDERLINE|ORIGIN);
term->flags |= sc->flags & (BOLD|INVERSE|UNDERLINE|ORIGIN);
CursorSet (screen, (term->flags & ORIGIN) ? sc->row - screen->top_marg
: sc->row, sc->col, term->flags);
}
|
