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
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
|
/*
Internal file viewer for the Midnight Commander
Functions for searching in nroff-like view
Copyright (C) 1994-2023
Free Software Foundation, Inc.
Written by:
Miguel de Icaza, 1994, 1995, 1998
Janne Kukonlehto, 1994, 1995
Jakub Jelinek, 1995
Joseph M. Hinkle, 1996
Norbert Warmuth, 1997
Pavel Machek, 1998
Roland Illig <roland.illig@gmx.de>, 2004, 2005
Slava Zanko <slavazanko@google.com>, 2009
Andrew Borodin <aborodin@vmail.ru>, 2009
Ilia Maslakov <il.smind@gmail.com>, 2009
This file is part of the Midnight Commander.
The Midnight Commander is free software: you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of the License,
or (at your option) any later version.
The Midnight Commander is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "lib/global.h"
#include "lib/tty/tty.h"
#include "lib/skin.h"
#ifdef HAVE_CHARSET
#include "lib/charsets.h"
#endif
#include "internal.h"
/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
/*** file scope type declarations ****************************************************************/
/*** forward declarations (file scope functions) *************************************************/
/*** file scope variables ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
static gboolean
mcview_nroff_get_char (mcview_nroff_t * nroff, int *ret_val, off_t nroff_index)
{
int c = 0;
#ifdef HAVE_CHARSET
if (nroff->view->utf8)
{
if (!mcview_get_utf (nroff->view, nroff_index, &c, &nroff->char_length))
{
/* we need got symbol in any case */
nroff->char_length = 1;
if (!mcview_get_byte (nroff->view, nroff_index, &c) || !g_ascii_isprint (c))
return FALSE;
}
}
else
#endif
{
nroff->char_length = 1;
if (!mcview_get_byte (nroff->view, nroff_index, &c))
return FALSE;
}
*ret_val = c;
return g_unichar_isprint (c);
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
int
mcview__get_nroff_real_len (WView * view, off_t start, off_t length)
{
mcview_nroff_t *nroff;
int ret = 0;
off_t i = 0;
if (!view->mode_flags.nroff)
return 0;
nroff = mcview_nroff_seq_new_num (view, start);
if (nroff == NULL)
return 0;
while (i < length)
{
switch (nroff->type)
{
case NROFF_TYPE_BOLD:
ret += 1 + nroff->char_length; /* real char length and 0x8 */
break;
case NROFF_TYPE_UNDERLINE:
ret += 2; /* underline symbol and ox8 */
break;
default:
break;
}
i += nroff->char_length;
mcview_nroff_seq_next (nroff);
}
mcview_nroff_seq_free (&nroff);
return ret;
}
/* --------------------------------------------------------------------------------------------- */
mcview_nroff_t *
mcview_nroff_seq_new_num (WView * view, off_t lc_index)
{
mcview_nroff_t *nroff;
nroff = g_try_malloc0 (sizeof (mcview_nroff_t));
if (nroff != NULL)
{
nroff->index = lc_index;
nroff->view = view;
mcview_nroff_seq_info (nroff);
}
return nroff;
}
/* --------------------------------------------------------------------------------------------- */
mcview_nroff_t *
mcview_nroff_seq_new (WView * view)
{
return mcview_nroff_seq_new_num (view, (off_t) 0);
}
/* --------------------------------------------------------------------------------------------- */
void
mcview_nroff_seq_free (mcview_nroff_t ** nroff)
{
if (nroff == NULL || *nroff == NULL)
return;
MC_PTR_FREE (*nroff);
}
/* --------------------------------------------------------------------------------------------- */
nroff_type_t
mcview_nroff_seq_info (mcview_nroff_t * nroff)
{
int next, next2;
if (nroff == NULL)
return NROFF_TYPE_NONE;
nroff->type = NROFF_TYPE_NONE;
if (!mcview_nroff_get_char (nroff, &nroff->current_char, nroff->index))
return nroff->type;
if (!mcview_get_byte (nroff->view, nroff->index + nroff->char_length, &next) || next != '\b')
return nroff->type;
if (!mcview_nroff_get_char (nroff, &next2, nroff->index + 1 + nroff->char_length))
return nroff->type;
if (nroff->current_char == '_' && next2 == '_')
{
nroff->type = (nroff->prev_type == NROFF_TYPE_BOLD)
? NROFF_TYPE_BOLD : NROFF_TYPE_UNDERLINE;
}
else if (nroff->current_char == next2)
{
nroff->type = NROFF_TYPE_BOLD;
}
else if (nroff->current_char == '_')
{
nroff->current_char = next2;
nroff->type = NROFF_TYPE_UNDERLINE;
}
else if (nroff->current_char == '+' && next2 == 'o')
{
/* ??? */
}
return nroff->type;
}
/* --------------------------------------------------------------------------------------------- */
int
mcview_nroff_seq_next (mcview_nroff_t * nroff)
{
if (nroff == NULL)
return -1;
nroff->prev_type = nroff->type;
switch (nroff->type)
{
case NROFF_TYPE_BOLD:
nroff->index += 1 + nroff->char_length;
break;
case NROFF_TYPE_UNDERLINE:
nroff->index += 2;
break;
default:
break;
}
nroff->index += nroff->char_length;
mcview_nroff_seq_info (nroff);
return nroff->current_char;
}
/* --------------------------------------------------------------------------------------------- */
int
mcview_nroff_seq_prev (mcview_nroff_t * nroff)
{
int prev;
off_t prev_index, prev_index2;
if (nroff == NULL)
return -1;
nroff->prev_type = NROFF_TYPE_NONE;
if (nroff->index == 0)
return -1;
prev_index = nroff->index - 1;
while (prev_index != 0)
{
if (mcview_nroff_get_char (nroff, &nroff->current_char, prev_index))
break;
prev_index--;
}
if (prev_index == 0)
{
nroff->index--;
mcview_nroff_seq_info (nroff);
return nroff->current_char;
}
prev_index--;
if (!mcview_get_byte (nroff->view, prev_index, &prev) || prev != '\b')
{
nroff->index = prev_index;
mcview_nroff_seq_info (nroff);
return nroff->current_char;
}
prev_index2 = prev_index - 1;
while (prev_index2 != 0)
{
if (mcview_nroff_get_char (nroff, &prev, prev_index))
break;
prev_index2--;
}
nroff->index = (prev_index2 == 0) ? prev_index : prev_index2;
mcview_nroff_seq_info (nroff);
return nroff->current_char;
}
/* --------------------------------------------------------------------------------------------- */
|
