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