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 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 /* query user for a string and find it in a list window */
 128 int
 129 screen_find(list_window_t *lw,
 130             int rows,
 131             command_t findcmd,
 132             list_window_callback_fn_t callback_fn,
 133             void *callback_data)
 134 {
 135         int reversed = 0;
 136         bool found;
 137         const char *prompt = FIND_PROMPT;
 138         char *value = options.find_show_last_pattern ? (char *) -1 : NULL;
 139
 140         if (findcmd == CMD_LIST_RFIND || findcmd == CMD_LIST_RFIND_NEXT) {
 141                 prompt = RFIND_PROMPT;
 142                 reversed = 1;
 143         }
 144
 145         switch (findcmd) {
 146         case CMD_LIST_FIND:
 147         case CMD_LIST_RFIND:
 148                 if (screen.findbuf) {
 149                         g_free(screen.findbuf);
 150                         screen.findbuf=NULL;
 151                 }
 152                 /* continue... */
 153
 154         case CMD_LIST_FIND_NEXT:
 155         case CMD_LIST_RFIND_NEXT:
 156                 if (!screen.findbuf)
 157                         screen.findbuf=screen_readln(screen.status_window.w,
 158                                                      prompt,
 159                                                      value,
 160                                                      &screen.find_history,
 161                                                      NULL);
 162
 163                 if (screen.findbuf == NULL)
 164                         return 1;
 165
 166                 found = reversed
 167                         ? list_window_rfind(lw,
 168                                             callback_fn, callback_data,
 169                                             screen.findbuf,
 170                                             options.find_wrap,
 171                                             options.bell_on_wrap,
 172                                             rows)
 173                         : list_window_find(lw,
 174                                            callback_fn, callback_data,
 175                                            screen.findbuf,
 176                                            options.find_wrap,
 177                                            options.bell_on_wrap);
 178                 if (!found) {
 179                         screen_status_printf(_("Unable to find \'%s\'"),
 180                                              screen.findbuf);
 181                         screen_bell();
 182                 }
 183                 return 1;
 184         default:
 185                 break;
 186         }
 187         return 0;
 188 }
 189
 190 /* query user for a string and jump to the entry
 191  * which begins with this string while the users types */
 192 void
 193 screen_jump(struct list_window *lw,
 194                 list_window_callback_fn_t callback_fn,
 195                 void *callback_data)
 196 {
 197         char *search_str, *iter;
 198         const int WRLN_MAX_LINE_SIZE = 1024;
 199         int key = 65;
 200         command_t cmd;
 201
 202         if (screen.findbuf) {
 203                 g_free(screen.findbuf);
 204                 screen.findbuf = NULL;
 205         }
 206         screen.findbuf = g_malloc0(WRLN_MAX_LINE_SIZE);
 207         /* In screen.findbuf is the whole string which is displayed in the status_window
 208          * and search_str is the string the user entered (without the prompt) */
 209         search_str = screen.findbuf + g_snprintf(screen.findbuf, WRLN_MAX_LINE_SIZE, "%s: ", JUMP_PROMPT);
 210         iter = search_str;
 211
 212         /* unfortunately wgetch returns "next/previous-page" not as an ascii-char */
 213         while(!g_ascii_iscntrl(key) && key != KEY_NPAGE && key != KEY_PPAGE) {
 214                 key = screen_getch(screen.status_window.w, screen.findbuf);
 215                 /* if backspace or delete was pressed */
 216                 if (key == KEY_BACKSPACE || key == 330) {
 217                         int i;
 218                         /* don't end the loop */
 219                         key = 65;
 220                         if (search_str <= g_utf8_find_prev_char(screen.findbuf, iter))
 221                                 iter = g_utf8_find_prev_char(screen.findbuf, iter);
 222                         for (i = 0; *(iter + i) != '\0'; i++)
 223                                 *(iter + i) = '\0';
 224                         continue;
 225                 }
 226                 else {
 227                         *iter = key;
 228                         if (iter < screen.findbuf + WRLN_MAX_LINE_SIZE - 3)
 229                                 ++iter;
 230                 }
 231                 list_window_jump(lw, callback_fn, callback_data, search_str);
 232                 /* repaint the list_window */
 233                 list_window_paint(lw, callback_fn, callback_data);
 234                 wrefresh(lw->w);
 235         }
 236
 237         /* ncmpc should get the command */
 238         ungetch(key);
 239         if ((cmd=get_keyboard_command()) != CMD_NONE)
 240                 do_input_event(cmd);
 241 }
 242
 243 void
 244 screen_display_completion_list(GList *list)
 245 {
 246         static GList *prev_list = NULL;
 247         static guint prev_length = 0;
 248         static guint offset = 0;
 249         WINDOW *w = screen.main_window.w;
 250         guint length, y=0;
 251
 252         length = g_list_length(list);
 253         if (list == prev_list && length == prev_length) {
 254                 offset += screen.main_window.rows;
 255                 if (offset >= length)
 256                         offset = 0;
 257         } else {
 258                 prev_list = list;
 259                 prev_length = length;
 260                 offset = 0;
 261         }
 262
 263         colors_use(w, COLOR_STATUS_ALERT);
 264         while (y < screen.main_window.rows) {
 265                 GList *item = g_list_nth(list, y+offset);
 266
 267                 wmove(w, y++, 0);
 268                 wclrtoeol(w);
 269                 if (item) {
 270                         gchar *tmp = g_strdup(item->data);
 271                         waddstr(w, g_basename(tmp));
 272                         g_free(tmp);
 273                 }
 274         }
 275
 276         wrefresh(w);
 277         doupdate();
 278         colors_use(w, COLOR_LIST);
 279 }
 280
 281 #ifndef NCMPC_MINI
 282 void
 283 set_xterm_title(const char *format, ...)
 284 {
 285         /* the current xterm title exists under the WM_NAME property */
 286         /* and can be retrieved with xprop -id $WINDOWID */
 287
 288         if (options.enable_xterm_title) {
 289                 if (g_getenv("WINDOWID")) {
 290                         char *msg;
 291                         va_list ap;
 292
 293                         va_start(ap,format);
 294                         msg = g_strdup_vprintf(format,ap);
 295                         va_end(ap);
 296                         printf("%c]0;%s%c", '\033', msg, '\007');
 297                         g_free(msg);
 298                 } else
 299                         options.enable_xterm_title = FALSE;
 300         }
 301 }
 302 #endif