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