src/screen_utils.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "screen_utils.h"
  21 #include "screen.h"
  22 #include "mpdclient.h"
  23 #include "config.h"
  24 #include "i18n.h"
  25 #include "options.h"
  26 #include "colors.h"
  27 #include "wreadln.h"
  28 #ifndef NCMPC_H
  29 #include "ncmpc.h"
  30 #endif /* NCMPC_H */
  31
  32 #include <mpd/client.h>
  33
  34 #include <stdlib.h>
  35 #include <unistd.h>
  36
  37 #define FIND_PROMPT  _("Find")
  38 #define RFIND_PROMPT _("Find backward")
  39 #define JUMP_PROMPT _("Jump")
  40
  41 void
  42 screen_bell(void)
  43 {
  44         if (options.audible_bell)
  45                 beep();
  46         if (options.visible_bell)
  47                 flash();
  48 }
  49
  50 int
  51 screen_getch(WINDOW *w, const char *prompt)
  52 {
  53         int key = -1;
  54
  55         colors_use(w, COLOR_STATUS_ALERT);
  56         werase(w);
  57         wmove(w, 0, 0);
  58         waddstr(w, prompt);
  59
  60         echo();
  61         curs_set(1);
  62
  63         while ((key = wgetch(w)) == ERR)
  64                 ;
  65
  66 #ifdef HAVE_GETMOUSE
  67         /* ignore mouse events */
  68         if (key == KEY_MOUSE)
  69                 return screen_getch(w, prompt);
  70 #endif
  71
  72         noecho();
  73         curs_set(0);
  74
  75         return key;
  76 }
  77
  78 char *
  79 screen_readln(WINDOW *w,
  80               const char *prompt,
  81               const char *value,
  82               GList **history,
  83               GCompletion *gcmp)
  84 {
  85         char *line = NULL;
  86
  87         wmove(w, 0,0);
  88         curs_set(1);
  89         colors_use(w, COLOR_STATUS_ALERT);
  90         line = wreadln(w, prompt, value, COLS, history, gcmp);
  91         curs_set(0);
  92         return line;
  93 }
  94
  95 char *
  96 screen_getstr(WINDOW *w, const char *prompt)
  97 {
  98         return screen_readln(w, prompt, NULL, NULL, NULL);
  99 }
 100
 101 static char *
 102 screen_read_password(WINDOW *w, const char *prompt)
 103 {
 104         char *ret;
 105
 106         if (w == NULL) {
 107                 int rows, cols;
 108                 getmaxyx(stdscr, rows, cols);
 109                 /* create window for input */
 110                 w = newwin(1,  cols, rows-1, 0);
 111                 leaveok(w, FALSE);
 112                 keypad(w, TRUE);
 113         }
 114
 115         wmove(w, 0,0);
 116         curs_set(1);
 117         colors_use(w, COLOR_STATUS_ALERT);
 118
 119         if (prompt == NULL)
 120                 prompt = _("Password");
 121         ret = wreadln_masked(w, prompt, NULL, COLS, NULL, NULL);
 122
 123         curs_set(0);
 124         return ret;
 125 }
 126
 127 static gint
 128 _screen_auth(struct mpdclient *c, gint recursion)
 129 {
 130         char *password;
 131
 132         mpd_connection_clear_error(c->connection);
 133         if (recursion > 2)
 134                 return 1;
 135
 136         password = screen_read_password(NULL, NULL);
 137         if (password == NULL)
 138                 return 1;
 139
 140         mpd_send_password(c->connection, password);
 141         g_free(password);
 142
 143         mpd_response_finish(c->connection);
 144         mpdclient_update(c);
 145
 146         if (mpd_connection_get_error(c->connection) == MPD_ERROR_SERVER &&
 147             mpd_connection_get_server_error(c->connection) == MPD_SERVER_ERROR_PASSWORD)
 148                 return  _screen_auth(c, ++recursion);
 149         return 0;
 150 }
 151
 152 gint
 153 screen_auth(struct mpdclient *c)
 154 {
 155         gint ret = _screen_auth(c, 0);
 156         mpdclient_update(c);
 157         curs_set(0);
 158         return ret;
 159 }
 160
 161 /* query user for a string and find it in a list window */
 162 int
 163 screen_find(list_window_t *lw,
 164             int rows,
 165             command_t findcmd,
 166             list_window_callback_fn_t callback_fn,
 167             void *callback_data)
 168 {
 169         int reversed = 0;
 170         bool found;
 171         const char *prompt = FIND_PROMPT;
 172         char *value = options.find_show_last_pattern ? (char *) -1 : NULL;
 173
 174         if (findcmd == CMD_LIST_RFIND || findcmd == CMD_LIST_RFIND_NEXT) {
 175                 prompt = RFIND_PROMPT;
 176                 reversed = 1;
 177         }
 178
 179         switch (findcmd) {
 180         case CMD_LIST_FIND:
 181         case CMD_LIST_RFIND:
 182                 if (screen.findbuf) {
 183                         g_free(screen.findbuf);
 184                         screen.findbuf=NULL;
 185                 }
 186                 /* continue... */
 187
 188         case CMD_LIST_FIND_NEXT:
 189         case CMD_LIST_RFIND_NEXT:
 190                 if (!screen.findbuf)
 191                         screen.findbuf=screen_readln(screen.status_window.w,
 192                                                      prompt,
 193                                                      value,
 194                                                      &screen.find_history,
 195                                                      NULL);
 196
 197                 if (screen.findbuf == NULL)
 198                         return 1;
 199
 200                 found = reversed
 201                         ? list_window_rfind(lw,
 202                                             callback_fn, callback_data,
 203                                             screen.findbuf,
 204                                             options.find_wrap,
 205                                             options.bell_on_wrap,
 206                                             rows)
 207                         : list_window_find(lw,
 208                                            callback_fn, callback_data,
 209                                            screen.findbuf,
 210                                            options.find_wrap,
 211                                            options.bell_on_wrap);
 212                 if (!found) {
 213                         screen_status_printf(_("Unable to find \'%s\'"),
 214                                              screen.findbuf);
 215                         screen_bell();
 216                 }
 217                 return 1;
 218         default:
 219                 break;
 220         }
 221         return 0;
 222 }
 223
 224 /* query user for a string and jump to the entry
 225  * which begins with this string while the users types */
 226 void
 227 screen_jump(struct list_window *lw,
 228                 list_window_callback_fn_t callback_fn,
 229                 void *callback_data)
 230 {
 231         char *search_str, *iter;
 232         const int WRLN_MAX_LINE_SIZE = 1024;
 233         int key = 65;
 234         command_t cmd;
 235
 236         if (screen.findbuf) {
 237                 g_free(screen.findbuf);
 238                 screen.findbuf = NULL;
 239         }
 240         screen.findbuf = g_malloc0(WRLN_MAX_LINE_SIZE);
 241         /* In screen.findbuf is the whole string which is displayed in the status_window
 242          * and search_str is the string the user entered (without the prompt) */
 243         search_str = screen.findbuf + g_snprintf(screen.findbuf, WRLN_MAX_LINE_SIZE, "%s: ", JUMP_PROMPT);
 244         iter = search_str;
 245
 246         /* unfortunately wgetch returns "next/previous-page" not as an ascii-char */
 247         while(!g_ascii_iscntrl(key) && key != KEY_NPAGE && key != KEY_PPAGE) {
 248                 key = screen_getch(screen.status_window.w, screen.findbuf);
 249                 /* if backspace or delete was pressed */
 250                 if (key == KEY_BACKSPACE || key == 330) {
 251                         int i;
 252                         /* don't end the loop */
 253                         key = 65;
 254                         if (search_str <= g_utf8_find_prev_char(screen.findbuf, iter))
 255                                 iter = g_utf8_find_prev_char(screen.findbuf, iter);
 256                         for (i = 0; *(iter + i) != '\0'; i++)
 257                                 *(iter + i) = '\0';
 258                         continue;
 259                 }
 260                 else {
 261                         *iter = key;
 262                         if (iter < screen.findbuf + WRLN_MAX_LINE_SIZE - 3)
 263                                 ++iter;
 264                 }
 265                 list_window_jump(lw, callback_fn, callback_data, search_str);
 266                 /* repaint the list_window */
 267                 list_window_paint(lw, callback_fn, callback_data);
 268                 wrefresh(lw->w);
 269         }
 270
 271         /* ncmpc should get the command */
 272         ungetch(key);
 273         if ((cmd=get_keyboard_command()) != CMD_NONE)
 274                 do_input_event(cmd);
 275 }
 276
 277 void
 278 screen_display_completion_list(GList *list)
 279 {
 280         static GList *prev_list = NULL;
 281         static guint prev_length = 0;
 282         static guint offset = 0;
 283         WINDOW *w = screen.main_window.w;
 284         guint length, y=0;
 285
 286         length = g_list_length(list);
 287         if (list == prev_list && length == prev_length) {
 288                 offset += screen.main_window.rows;
 289                 if (offset >= length)
 290                         offset = 0;
 291         } else {
 292                 prev_list = list;
 293                 prev_length = length;
 294                 offset = 0;
 295         }
 296
 297         colors_use(w, COLOR_STATUS_ALERT);
 298         while (y < screen.main_window.rows) {
 299                 GList *item = g_list_nth(list, y+offset);
 300
 301                 wmove(w, y++, 0);
 302                 wclrtoeol(w);
 303                 if (item) {
 304                         gchar *tmp = g_strdup(item->data);
 305                         waddstr(w, g_basename(tmp));
 306                         g_free(tmp);
 307                 }
 308         }
 309
 310         wrefresh(w);
 311         doupdate();
 312         colors_use(w, COLOR_LIST);
 313 }
 314
 315 #ifndef NCMPC_MINI
 316 void
 317 set_xterm_title(const char *format, ...)
 318 {
 319         /* the current xterm title exists under the WM_NAME property */
 320         /* and can be retrieved with xprop -id $WINDOWID */
 321
 322         if (options.enable_xterm_title) {
 323                 if (g_getenv("WINDOWID")) {
 324                         char *msg;
 325                         va_list ap;
 326
 327                         va_start(ap,format);
 328                         msg = g_strdup_vprintf(format,ap);
 329                         va_end(ap);
 330                         printf("%c]0;%s%c", '\033', msg, '\007');
 331                         g_free(msg);
 332                 } else
 333                         options.enable_xterm_title = FALSE;
 334         }
 335 }
 336 #endif