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
|
/* m-x.c -- Meta-X minibuffer reader. */
/* This file is part of GNU Info, a program for reading online documentation
stored in Info format.
Copyright (C) 1993 Free Software Foundation, Inc.
This program 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 2, or (at your option)
any later version.
This program 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Written by Brian Fox (bfox@ai.mit.edu). */
#include "info.h"
/* **************************************************************** */
/* */
/* Reading Named Commands */
/* */
/* **************************************************************** */
/* Read the name of an Info function in the echo area and return the
name. A return value of NULL indicates that no function name could
be read. */
char *
read_function_name (prompt, window)
char *prompt;
WINDOW *window;
{
register int i;
char *line;
REFERENCE **array = (REFERENCE **)NULL;
int array_index = 0, array_slots = 0;
/* Make an array of REFERENCE which actually contains the names of
the functions available in Info. */
for (i = 0; function_doc_array[i].func; i++)
{
REFERENCE *entry;
entry = (REFERENCE *)xmalloc (sizeof (REFERENCE));
entry->label = strdup (function_doc_array[i].func_name);
entry->nodename = (char *)NULL;
entry->filename = (char *)NULL;
add_pointer_to_array
(entry, array_index, array, array_slots, 200, REFERENCE *);
}
line = info_read_completing_in_echo_area (window, prompt, array);
info_free_references (array);
if (!echo_area_is_active)
window_clear_echo_area ();
return (line);
}
DECLARE_INFO_COMMAND (describe_command,
"Read the name of an Info command and describe it")
{
char *line;
line = read_function_name ("Describe command: ", window);
if (!line)
{
info_abort_key (active_window, count, key);
return;
}
/* Describe the function named in "LINE". */
if (*line)
{
char *fundoc;
VFunction *fun;
fun = named_function (line);
if (!fun)
return;
window_message_in_echo_area ("%s: %s.",
line, function_documentation (fun));
}
free (line);
}
DECLARE_INFO_COMMAND (info_execute_command,
"Read a command name in the echo area and execute it")
{
char *line;
/* Ask the completer to read a reference for us. */
if (info_explicit_arg || count != 1)
{
char *prompt;
prompt = (char *)xmalloc (20);
sprintf (prompt, "%d M-x ", count);
line = read_function_name (prompt, window);
}
else
line = read_function_name ("M-x ", window);
/* User aborted? */
if (!line)
{
info_abort_key (active_window, count, key);
return;
}
/* User accepted "default"? (There is none.) */
if (!*line)
{
free (line);
return;
}
/* User wants to execute a named command. Do it. */
{
VFunction *function;
if ((active_window != the_echo_area) &&
(strncmp (line, "echo-area-", 10) == 0))
{
free (line);
info_error ("Cannot execute an `echo-area' command here.");
return;
}
function = named_function (line);
free (line);
if (!function)
return;
(*function) (active_window, count, 0);
}
}
/* Okay, now that we have M-x, let the user set the screen height. */
DECLARE_INFO_COMMAND (set_screen_height,
"Set the height of the displayed window")
{
int new_height;
if (info_explicit_arg || count != 1)
new_height = count;
else
{
char prompt[80];
char *line;
new_height = screenheight;
sprintf (prompt, "Set screen height to (%d): ", new_height);
line = info_read_in_echo_area (window, prompt);
/* If the user aborted, do that now. */
if (!line)
{
info_abort_key (active_window, count, 0);
return;
}
/* Find out what the new height is supposed to be. */
if (*line)
new_height = atoi (line);
/* Clear the echo area if it isn't active. */
if (!echo_area_is_active)
window_clear_echo_area ();
free (line);
}
terminal_clear_screen ();
display_clear_display (the_display);
screenheight = new_height;
display_initialize_display (screenwidth, screenheight);
window_new_screen_size (screenwidth, screenheight);
}
|
