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- src/filemanager/command.c
![[previous]](../icons/n_left.png){kind=icon}
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![[top]](../icons/n_top.png){kind=icon}
*/
1 /*
2 Command line widget.
3 This widget is derived from the WInput widget, it's used to cope
4 with all the magic of the command input line, we depend on some
5 help from the program's callback.
6
7 Copyright (C) 1995-2022
8 Free Software Foundation, Inc.
9
10 Written by:
11 Slava Zanko <slavazanko@gmail.com>, 2013
12 Andrew Borodin <aborodin@vmail.ru>, 2011-2022
13
14 This file is part of the Midnight Commander.
15
16 The Midnight Commander is free software: you can redistribute it
17 and/or modify it under the terms of the GNU General Public License as
18 published by the Free Software Foundation, either version 3 of the License,
19 or (at your option) any later version.
20
21 The Midnight Commander is distributed in the hope that it will be useful,
22 but WITHOUT ANY WARRANTY; without even the implied warranty of
23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 GNU General Public License for more details.
25
26 You should have received a copy of the GNU General Public License
27 along with this program. If not, see <http://www.gnu.org/licenses/>.
28 */
29
30 /** \file command.c
31 * \brief Source: command line widget
32 */
33
34 #include <config.h>
35
36 #include <stdlib.h>
37 #include <string.h>
38
39 #include "lib/global.h"
40 #include "lib/vfs/vfs.h" /* vfs_current_is_local() */
41 #include "lib/skin.h" /* DEFAULT_COLOR */
42 #include "lib/util.h" /* whitespace() */
43 #include "lib/widget.h"
44
45 #include "src/setup.h" /* quit */
46 #ifdef ENABLE_SUBSHELL
47 #include "src/subshell/subshell.h"
48 #endif
49 #include "src/execute.h" /* shell_execute() */
50 #include "src/usermenu.h" /* expand_format() */
51
52 #include "filemanager.h" /* quiet_quit_cmd(), layout.h */
53 #include "cd.h" /* cd_to() */
54
55 #include "command.h"
56
57 /*** global variables ****************************************************************************/
58
59 /* This holds the command line */
60 WInput *cmdline;
61
62 /*** file scope macro definitions ****************************************************************/
63
64 /*** file scope type declarations ****************************************************************/
65
66 /*** file scope variables ************************************************************************/
67
68 /* Color styles command line */
69 static input_colors_t command_colors;
70
71 /* --------------------------------------------------------------------------------------------- */
72 /*** file scope functions ************************************************************************/
73 /* --------------------------------------------------------------------------------------------- */
74
75 /** Handle Enter on the command line
76 *
77 * @param lc_cmdline string for handling
78 * @return MSG_HANDLED on sucsess else MSG_NOT_HANDLED
79 */
80
81 static cb_ret_t
82 enter (WInput * lc_cmdline)
/* ![[next]](../icons/right.png)
![[first]](../icons/n_first.png)
*/
83 {
84 const char *cmd = lc_cmdline->buffer->str;
85
86 if (!command_prompt)
87 return MSG_HANDLED;
88
89 /* Any initial whitespace should be removed at this point */
90 while (whiteness (*cmd))
91 cmd++;
92
93 if (*cmd == '\0')
94 return MSG_HANDLED;
95
96 if (strncmp (cmd, "cd", 2) == 0 && (cmd[2] == '\0' || whitespace (cmd[2])))
97 {
98 cd_to (cmd + 2);
99 input_clean (lc_cmdline);
100 return MSG_HANDLED;
101 }
102 else if (strcmp (cmd, "exit") == 0)
103 {
104 input_assign_text (lc_cmdline, "");
105 if (!quiet_quit_cmd ())
106 return MSG_NOT_HANDLED;
107 }
108 else
109 {
110 GString *command;
111 size_t i;
112
113 if (!vfs_current_is_local ())
114 {
115 message (D_ERROR, MSG_ERROR, _("Cannot execute commands on non-local filesystems"));
116 return MSG_NOT_HANDLED;
117 }
118 #ifdef ENABLE_SUBSHELL
119 /* Check this early before we clean command line
120 * (will be checked again by shell_execute) */
121 if (mc_global.tty.use_subshell && subshell_state != INACTIVE)
122 {
123 message (D_ERROR, MSG_ERROR, _("The shell is already running a command"));
124 return MSG_NOT_HANDLED;
125 }
126 #endif
127 command = g_string_sized_new (32);
128
129 for (i = 0; cmd[i] != '\0'; i++)
130 {
131 if (cmd[i] != '%')
132 g_string_append_c (command, cmd[i]);
133 else
134 {
135 char *s;
136
137 s = expand_format (NULL, cmd[++i], TRUE);
138 g_string_append (command, s);
139 g_free (s);
140 }
141 }
142
143 input_clean (lc_cmdline);
144 shell_execute (command->str, 0);
145 g_string_free (command, TRUE);
146
147 #ifdef ENABLE_SUBSHELL
148 if ((quit & SUBSHELL_EXIT) != 0)
149 {
150 if (quiet_quit_cmd ())
151 return MSG_HANDLED;
152
153 quit = 0;
154 /* restart subshell */
155 if (mc_global.tty.use_subshell)
156 init_subshell ();
157 }
158
159 if (mc_global.tty.use_subshell)
160 do_load_prompt ();
161 #endif
162 }
163 return MSG_HANDLED;
164 }
165
166 /* --------------------------------------------------------------------------------------------- */
167
168 /**
169 * Default command line callback
170 *
171 * @param w Widget object
172 * @param msg message for handling
173 * @param parm extra parameter such as key code
174 *
175 * @return MSG_NOT_HANDLED on fail else MSG_HANDLED
176 */
177
178 static cb_ret_t
179 command_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data)
/* ![[previous]](../icons/left.png)
*/
180 {
181 switch (msg)
182 {
183 case MSG_KEY:
184 /* Special case: we handle the enter key */
185 if (parm == '\n')
186 return enter (INPUT (w));
187 MC_FALLTHROUGH;
188
189 default:
190 return input_callback (w, sender, msg, parm, data);
191 }
192 }
193
194 /* --------------------------------------------------------------------------------------------- */
195 /*** public functions ****************************************************************************/
196 /* --------------------------------------------------------------------------------------------- */
197
198 WInput *
199 command_new (int y, int x, int cols)
/* */
200 {
201 WInput *cmd;
202 Widget *w;
203
204 cmd = input_new (y, x, command_colors, cols, "", "cmdline",
205 INPUT_COMPLETE_FILENAMES | INPUT_COMPLETE_VARIABLES | INPUT_COMPLETE_USERNAMES
206 | INPUT_COMPLETE_HOSTNAMES | INPUT_COMPLETE_CD | INPUT_COMPLETE_COMMANDS |
207 INPUT_COMPLETE_SHELL_ESC);
208 w = WIDGET (cmd);
209 /* Don't set WOP_SELECTABLE up, otherwise panels will be unselected */
210 widget_set_options (w, WOP_SELECTABLE, FALSE);
211 /* Add our hooks */
212 w->callback = command_callback;
213
214 return cmd;
215 }
216
217 /* --------------------------------------------------------------------------------------------- */
218 /**
219 * Set colors for the command line.
220 */
221
222 void
223 command_set_default_colors (void)
/* */
224 {
225 command_colors[WINPUTC_MAIN] = DEFAULT_COLOR;
226 command_colors[WINPUTC_MARK] = COMMAND_MARK_COLOR;
227 command_colors[WINPUTC_UNCHANGED] = DEFAULT_COLOR;
228 command_colors[WINPUTC_HISTORY] = COMMAND_HISTORY_COLOR;
229 }
230
231 /* --------------------------------------------------------------------------------------------- */
232 /**
233 * Insert quoted text in input line. The function is meant for the
234 * command line, so the percent sign is quoted as well.
235 *
236 * @param in WInput object
237 * @param text string for insertion
238 * @param insert_extra_space add extra space
239 */
240
241 void
242 command_insert (WInput * in, const char *text, gboolean insert_extra_space)
/* ![[last]](../icons/n_last.png)
*/
243 {
244 char *quoted_text;
245
246 quoted_text = name_quote (text, TRUE);
247 input_insert (in, quoted_text, insert_extra_space);
248 g_free (quoted_text);
249 }
250
251 /* --------------------------------------------------------------------------------------------- */
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*/