|
1
|
1 // pager.cc -*- C++ -*- |
|
|
2 /* |
|
|
3 |
|
1009
|
4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
|
1
|
5 |
|
|
6 This file is part of Octave. |
|
|
7 |
|
|
8 Octave is free software; you can redistribute it and/or modify it |
|
|
9 under the terms of the GNU General Public License as published by the |
|
|
10 Free Software Foundation; either version 2, or (at your option) any |
|
|
11 later version. |
|
|
12 |
|
|
13 Octave is distributed in the hope that it will be useful, but WITHOUT |
|
|
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
|
|
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
|
16 for more details. |
|
|
17 |
|
|
18 You should have received a copy of the GNU General Public License |
|
|
19 along with Octave; see the file COPYING. If not, write to the Free |
|
1315
|
20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
1
|
21 |
|
|
22 */ |
|
|
23 |
|
240
|
24 #ifdef HAVE_CONFIG_H |
|
1192
|
25 #include <config.h> |
|
1
|
26 #endif |
|
|
27 |
|
990
|
28 #include <signal.h> |
|
1
|
29 #include <iostream.h> |
|
|
30 #include <strstream.h> |
|
581
|
31 #include <fstream.h> |
|
1
|
32 #include <stdlib.h> |
|
|
33 |
|
|
34 #include "procstream.h" |
|
|
35 |
|
990
|
36 #include "sighandlers.h" |
|
1
|
37 #include "user-prefs.h" |
|
581
|
38 #include "oct-obj.h" |
|
|
39 #include "error.h" |
|
|
40 #include "defun.h" |
|
1
|
41 #include "input.h" |
|
|
42 #include "pager.h" |
|
581
|
43 #include "utils.h" |
|
|
44 #include "help.h" |
|
1
|
45 |
|
|
46 // Where we stash output headed for the screen. |
|
529
|
47 static ostrstream *pager_buf = 0; |
|
1
|
48 |
|
581
|
49 // Nonzero means we write to the diary file. |
|
|
50 static int write_to_diary_file = 0; |
|
|
51 |
|
|
52 // The name of the current diary file. |
|
1306
|
53 static char *diary_file = 0; |
|
581
|
54 |
|
|
55 // The diary file. |
|
|
56 static ofstream diary_stream; |
|
|
57 |
|
1
|
58 static int |
|
|
59 line_count (char *s) |
|
|
60 { |
|
|
61 int count = 0; |
|
529
|
62 if (s) |
|
1
|
63 { |
|
|
64 char c; |
|
|
65 while ((c = *s++) != '\0') |
|
|
66 if (c == '\n') |
|
|
67 count++; |
|
|
68 } |
|
|
69 return count; |
|
|
70 } |
|
|
71 |
|
581
|
72 // For now, use the variables from readline. It already handles |
|
|
73 // SIGWINCH, so these values have a good chance of being correct even |
|
|
74 // if the window changes size (they will be wrong if, for example, the |
|
|
75 // luser changes the window size while the pager is running, and the |
|
|
76 // signal is handled by the pager instead of us. |
|
|
77 |
|
1
|
78 int |
|
|
79 terminal_columns (void) |
|
|
80 { |
|
|
81 extern int screenwidth; |
|
|
82 return screenwidth > 0 ? screenwidth : 80; |
|
|
83 } |
|
|
84 |
|
|
85 int |
|
|
86 terminal_rows (void) |
|
|
87 { |
|
|
88 extern int screenheight; |
|
|
89 return screenheight > 0 ? screenheight : 24; |
|
|
90 } |
|
|
91 |
|
|
92 void |
|
|
93 initialize_pager (void) |
|
|
94 { |
|
|
95 delete pager_buf; |
|
|
96 pager_buf = new ostrstream (); |
|
|
97 } |
|
|
98 |
|
|
99 void |
|
|
100 maybe_page_output (ostrstream& msg_buf) |
|
|
101 { |
|
|
102 msg_buf << ends; |
|
|
103 |
|
|
104 char *message = msg_buf.str (); |
|
|
105 |
|
|
106 if (interactive |
|
|
107 && user_pref.page_screen_output |
|
529
|
108 && user_pref.pager_binary) |
|
1
|
109 { |
|
|
110 *pager_buf << message; |
|
|
111 delete [] message; |
|
|
112 } |
|
|
113 else |
|
|
114 { |
|
|
115 cout << message; |
|
|
116 cout.flush (); |
|
|
117 delete [] message; |
|
|
118 } |
|
|
119 } |
|
|
120 |
|
|
121 void |
|
|
122 flush_output_to_pager (void) |
|
|
123 { |
|
988
|
124 // Extract message from buffer, then delete the buffer so that any |
|
|
125 // new messages get sent separately. |
|
1
|
126 |
|
988
|
127 *pager_buf << ends; |
|
1
|
128 char *message = pager_buf->str (); |
|
988
|
129 initialize_pager (); |
|
1
|
130 |
|
529
|
131 if (! message || ! *message) |
|
1
|
132 { |
|
|
133 delete [] message; |
|
|
134 return; |
|
|
135 } |
|
|
136 |
|
581
|
137 maybe_write_to_diary_file (message); |
|
|
138 |
|
1
|
139 int nlines = line_count (message); |
|
|
140 |
|
|
141 if (nlines > terminal_rows () - 2) |
|
|
142 { |
|
|
143 char *pgr = user_pref.pager_binary; |
|
529
|
144 if (pgr) |
|
1
|
145 { |
|
|
146 oprocstream pager_stream (pgr); |
|
|
147 if (pager_stream) |
|
|
148 { |
|
990
|
149 volatile sig_handler *old_sigint_handler; |
|
|
150 old_sigint_handler = signal (SIGINT, SIG_IGN); |
|
|
151 |
|
1
|
152 pager_stream << message; |
|
988
|
153 delete [] message; |
|
1
|
154 pager_stream.flush (); |
|
993
|
155 pager_stream.close (); |
|
990
|
156 |
|
|
157 signal (SIGINT, old_sigint_handler); |
|
|
158 |
|
1
|
159 return; |
|
|
160 } |
|
|
161 } |
|
|
162 } |
|
|
163 |
|
|
164 cout << message; |
|
988
|
165 delete [] message; |
|
1
|
166 cout.flush (); |
|
|
167 } |
|
|
168 |
|
581
|
169 static void |
|
|
170 open_diary_file (void) |
|
|
171 { |
|
|
172 if (diary_stream.is_open ()) |
|
|
173 diary_stream.close (); |
|
|
174 |
|
|
175 diary_stream.open (diary_file, ios::app); |
|
|
176 |
|
|
177 if (! diary_stream) |
|
|
178 error ("diary: can't open diary file `%s'", diary_file); |
|
|
179 } |
|
|
180 |
|
|
181 void |
|
|
182 close_diary_file (void) |
|
|
183 { |
|
|
184 if (diary_stream) |
|
|
185 diary_stream.close (); |
|
|
186 } |
|
|
187 |
|
|
188 void |
|
|
189 maybe_write_to_diary_file (const char *s) |
|
|
190 { |
|
|
191 if (write_to_diary_file && diary_stream) |
|
|
192 diary_stream << s; |
|
|
193 } |
|
|
194 |
|
|
195 DEFUN_TEXT ("diary", Fdiary, Sdiary, -1, 1, |
|
|
196 "diary [on|off]\n\ |
|
|
197 diary [file]\n\ |
|
|
198 \n\ |
|
|
199 redirect all input and screen output to a file.") |
|
|
200 { |
|
|
201 Octave_object retval; |
|
|
202 |
|
|
203 DEFINE_ARGV("diary"); |
|
|
204 |
|
1306
|
205 if (! diary_file) |
|
|
206 diary_file = strsave ("diary"); |
|
|
207 |
|
581
|
208 switch (argc) |
|
|
209 { |
|
|
210 case 1: |
|
|
211 write_to_diary_file = ! write_to_diary_file; |
|
|
212 open_diary_file (); |
|
|
213 break; |
|
623
|
214 |
|
581
|
215 case 2: |
|
|
216 { |
|
|
217 char *arg = argv[1]; |
|
|
218 if (strcmp (arg, "on") == 0) |
|
|
219 { |
|
|
220 write_to_diary_file = 1; |
|
|
221 open_diary_file (); |
|
|
222 } |
|
|
223 else if (strcmp (arg, "off") == 0) |
|
|
224 write_to_diary_file = 0; |
|
|
225 else |
|
|
226 { |
|
|
227 delete [] diary_file; |
|
|
228 diary_file = strsave (arg); |
|
|
229 open_diary_file (); |
|
|
230 } |
|
|
231 } |
|
|
232 break; |
|
777
|
233 |
|
581
|
234 default: |
|
|
235 print_usage ("diary"); |
|
|
236 break; |
|
|
237 } |
|
|
238 |
|
|
239 DELETE_ARGV; |
|
|
240 |
|
|
241 return retval; |
|
|
242 } |
|
|
243 |
|
1
|
244 /* |
|
|
245 ;;; Local Variables: *** |
|
|
246 ;;; mode: C++ *** |
|
|
247 ;;; page-delimiter: "^/\\*" *** |
|
|
248 ;;; End: *** |
|
|
249 */ |
