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_message.h"
  22 #include "screen.h"
  23 #include "mpdclient.h"
  24 #include "config.h"
  25 #include "i18n.h"
  26 #include "options.h"
  27 #include "colors.h"
  28 #include "wreadln.h"
  29 #ifndef NCMPC_H
  30 #include "ncmpc.h"
  31 #endif /* NCMPC_H */
  32
  33 #include <mpd/client.h>
  34
  35 #include <stdlib.h>
  36 #include <unistd.h>
  37
  38 #define FIND_PROMPT  _("Find")
  39 #define RFIND_PROMPT _("Find backward")
  40 #define JUMP_PROMPT _("Jump")
  41
  42 void
  43 screen_bell(void)
  44 {
  45         if (options.audible_bell)
  46                 beep();
  47         if (options.visible_bell)
  48                 flash();
  49 }
  50
  51 int
  52 screen_getch(const char *prompt)
  53 {
  54         WINDOW *w = screen.status_bar.window.w;
  55         int key = -1;
  56
  57         colors_use(w, COLOR_STATUS_ALERT);
  58         werase(w);
  59         wmove(w, 0, 0);
  60         waddstr(w, prompt);
  61
  62         echo();
  63         curs_set(1);
  64
  65         while ((key = wgetch(w)) == ERR)
  66                 ;
  67
  68 #ifdef HAVE_GETMOUSE
  69         /* ignore mouse events */
  70         if (key == KEY_MOUSE)
  71                 return screen_getch(prompt);
  72 #endif
  73
  74         noecho();
  75         curs_set(0);
  76
  77         return key;
  78 }
  79
  80 char *
  81 screen_readln(const char *prompt,
  82               const char *value,
  83               GList **history,
  84               GCompletion *gcmp)
  85 {
  86         struct window *window = &screen.status_bar.window;
  87         WINDOW *w = window->w;
  88         char *line = NULL;
  89
  90         wmove(w, 0,0);
  91         curs_set(1);
  92         colors_use(w, COLOR_STATUS_ALERT);
  93         line = wreadln(w, prompt, value, window->cols, history, gcmp);
  94         curs_set(0);
  95         return line;
  96 }
  97
  98 char *
  99 screen_read_password(const char *prompt)
 100 {
 101         struct window *window = &screen.status_bar.window;
 102         WINDOW *w = window->w;
 103         char *ret;
 104
 105         wmove(w, 0,0);
 106         curs_set(1);
 107         colors_use(w, COLOR_STATUS_ALERT);
 108
 109         if (prompt == NULL)
 110                 prompt = _("Password");
 111         ret = wreadln_masked(w, prompt, NULL, window->cols, NULL, NULL);
 112
 113         curs_set(0);
 114         return ret;
 115 }
 116
 117 /* query user for a string and find it in a list window */
 118 int
 119 screen_find(list_window_t *lw,
 120             int rows,
 121             command_t findcmd,
 122             list_window_callback_fn_t callback_fn,
 123             void *callback_data)
 124 {
 125         int reversed = 0;
 126         bool found;
 127         const char *prompt = FIND_PROMPT;
 128         char *value = options.find_show_last_pattern ? (char *) -1 : NULL;
 129
 130         if (findcmd == CMD_LIST_RFIND || findcmd == CMD_LIST_RFIND_NEXT) {
 131                 prompt = RFIND_PROMPT;
 132                 reversed = 1;
 133         }
 134
 135         switch (findcmd) {
 136         case CMD_LIST_FIND:
 137         case CMD_LIST_RFIND:
 138                 if (screen.findbuf) {
 139                         g_free(screen.findbuf);
 140                         screen.findbuf=NULL;
 141                 }
 142                 /* continue... */
 143
 144         case CMD_LIST_FIND_NEXT:
 145         case CMD_LIST_RFIND_NEXT:
 146                 if (!screen.findbuf)
 147                         screen.findbuf=screen_readln(prompt,
 148                                                      value,
 149                                                      &screen.find_history,
 150                                                      NULL);
 151
 152                 if (screen.findbuf == NULL)
 153                         return 1;
 154
 155                 found = reversed
 156                         ? list_window_rfind(lw,
 157                                             callback_fn, callback_data,
 158                                             screen.findbuf,
 159                                             options.find_wrap,
 160                                             options.bell_on_wrap,
 161                                             rows)
 162                         : list_window_find(lw,
 163                                            callback_fn, callback_data,
 164                                            screen.findbuf,
 165                                            options.find_wrap,
 166                                            options.bell_on_wrap);
 167                 if (!found) {
 168                         screen_status_printf(_("Unable to find \'%s\'"),
 169                                              screen.findbuf);
 170                         screen_bell();
 171                 }
 172                 return 1;
 173         default:
 174                 break;
 175         }
 176         return 0;
 177 }
 178
 179 /* query user for a string and jump to the entry
 180  * which begins with this string while the users types */
 181 void
 182 screen_jump(struct list_window *lw,
 183                 list_window_callback_fn_t callback_fn,
 184                 void *callback_data)
 185 {
 186         char *search_str, *iter;
 187         const int WRLN_MAX_LINE_SIZE = 1024;
 188         int key = 65;
 189         command_t cmd;
 190
 191         if (screen.findbuf) {
 192                 g_free(screen.findbuf);
 193                 screen.findbuf = NULL;
 194         }
 195         screen.findbuf = g_malloc0(WRLN_MAX_LINE_SIZE);
 196         /* In screen.findbuf is the whole string which is displayed in the status_window
 197          * and search_str is the string the user entered (without the prompt) */
 198         search_str = screen.findbuf + g_snprintf(screen.findbuf, WRLN_MAX_LINE_SIZE, "%s: ", JUMP_PROMPT);
 199         iter = search_str;
 200
 201         /* unfortunately wgetch returns "next/previous-page" not as an ascii-char */
 202         while(!g_ascii_iscntrl(key) && key != KEY_NPAGE && key != KEY_PPAGE) {
 203                 key = screen_getch(screen.findbuf);
 204                 /* if backspace or delete was pressed */
 205                 if (key == KEY_BACKSPACE || key == 330) {
 206                         int i;
 207                         /* don't end the loop */
 208                         key = 65;
 209                         if (search_str <= g_utf8_find_prev_char(screen.findbuf, iter))
 210                                 iter = g_utf8_find_prev_char(screen.findbuf, iter);
 211                         for (i = 0; *(iter + i) != '\0'; i++)
 212                                 *(iter + i) = '\0';
 213                         continue;
 214                 }
 215                 else {
 216                         *iter = key;
 217                         if (iter < screen.findbuf + WRLN_MAX_LINE_SIZE - 3)
 218                                 ++iter;
 219                 }
 220                 list_window_jump(lw, callback_fn, callback_data, search_str);
 221                 /* repaint the list_window */
 222                 list_window_paint(lw, callback_fn, callback_data);
 223                 wrefresh(lw->w);
 224         }
 225
 226         /* ncmpc should get the command */
 227         ungetch(key);
 228         if ((cmd=get_keyboard_command()) != CMD_NONE)
 229                 do_input_event(cmd);
 230 }
 231
 232 void
 233 screen_display_completion_list(GList *list)
 234 {
 235         static GList *prev_list = NULL;
 236         static guint prev_length = 0;
 237         static guint offset = 0;
 238         WINDOW *w = screen.main_window.w;
 239         guint length, y=0;
 240
 241         length = g_list_length(list);
 242         if (list == prev_list && length == prev_length) {
 243                 offset += screen.main_window.rows;
 244                 if (offset >= length)
 245                         offset = 0;
 246         } else {
 247                 prev_list = list;
 248                 prev_length = length;
 249                 offset = 0;
 250         }
 251
 252         colors_use(w, COLOR_STATUS_ALERT);
 253         while (y < screen.main_window.rows) {
 254                 GList *item = g_list_nth(list, y+offset);
 255
 256                 wmove(w, y++, 0);
 257                 wclrtoeol(w);
 258                 if (item) {
 259                         gchar *tmp = g_strdup(item->data);
 260                         waddstr(w, g_basename(tmp));
 261                         g_free(tmp);
 262                 }
 263         }
 264
 265         wrefresh(w);
 266         doupdate();
 267         colors_use(w, COLOR_LIST);
 268 }
 269
 270 #ifndef NCMPC_MINI
 271 void
 272 set_xterm_title(const char *format, ...)
 273 {
 274         /* the current xterm title exists under the WM_NAME property */
 275         /* and can be retrieved with xprop -id $WINDOWID */
 276
 277         if (options.enable_xterm_title) {
 278                 if (g_getenv("WINDOWID")) {
 279                         char *msg;
 280                         va_list ap;
 281
 282                         va_start(ap,format);
 283                         msg = g_strdup_vprintf(format,ap);
 284                         va_end(ap);
 285                         printf("%c]0;%s%c", '\033', msg, '\007');
 286                         g_free(msg);
 287                 } else
 288                         options.enable_xterm_title = FALSE;
 289         }
 290 }
 291 #endif