src/screen_find.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_find.h"
  21 #include "screen_utils.h"
  22 #include "screen_message.h"
  23 #include "screen.h"
  24 #include "i18n.h"
  25 #include "options.h"
  26 #include "ncmpc.h"
  27
  28 #define FIND_PROMPT  _("Find")
  29 #define RFIND_PROMPT _("Find backward")
  30 #define JUMP_PROMPT _("Jump")
  31
  32 /* query user for a string and find it in a list window */
  33 int
  34 screen_find(list_window_t *lw,
  35             int rows,
  36             command_t findcmd,
  37             list_window_callback_fn_t callback_fn,
  38             void *callback_data)
  39 {
  40         int reversed = 0;
  41         bool found;
  42         const char *prompt = FIND_PROMPT;
  43         char *value = options.find_show_last_pattern ? (char *) -1 : NULL;
  44
  45         if (findcmd == CMD_LIST_RFIND || findcmd == CMD_LIST_RFIND_NEXT) {
  46                 prompt = RFIND_PROMPT;
  47                 reversed = 1;
  48         }
  49
  50         switch (findcmd) {
  51         case CMD_LIST_FIND:
  52         case CMD_LIST_RFIND:
  53                 if (screen.findbuf) {
  54                         g_free(screen.findbuf);
  55                         screen.findbuf=NULL;
  56                 }
  57                 /* continue... */
  58
  59         case CMD_LIST_FIND_NEXT:
  60         case CMD_LIST_RFIND_NEXT:
  61                 if (!screen.findbuf)
  62                         screen.findbuf=screen_readln(prompt,
  63                                                      value,
  64                                                      &screen.find_history,
  65                                                      NULL);
  66
  67                 if (screen.findbuf == NULL)
  68                         return 1;
  69
  70                 found = reversed
  71                         ? list_window_rfind(lw,
  72                                             callback_fn, callback_data,
  73                                             screen.findbuf,
  74                                             options.find_wrap,
  75                                             options.bell_on_wrap,
  76                                             rows)
  77                         : list_window_find(lw,
  78                                            callback_fn, callback_data,
  79                                            screen.findbuf,
  80                                            options.find_wrap,
  81                                            options.bell_on_wrap);
  82                 if (!found) {
  83                         screen_status_printf(_("Unable to find \'%s\'"),
  84                                              screen.findbuf);
  85                         screen_bell();
  86                 }
  87                 return 1;
  88         default:
  89                 break;
  90         }
  91         return 0;
  92 }
  93
  94 /* query user for a string and jump to the entry
  95  * which begins with this string while the users types */
  96 void
  97 screen_jump(struct list_window *lw,
  98                 list_window_callback_fn_t callback_fn,
  99                 void *callback_data)
 100 {
 101         char *search_str, *iter;
 102         const int WRLN_MAX_LINE_SIZE = 1024;
 103         int key = 65;
 104         command_t cmd;
 105
 106         if (screen.findbuf) {
 107                 g_free(screen.findbuf);
 108                 screen.findbuf = NULL;
 109         }
 110         screen.findbuf = g_malloc0(WRLN_MAX_LINE_SIZE);
 111         /* In screen.findbuf is the whole string which is displayed in the status_window
 112          * and search_str is the string the user entered (without the prompt) */
 113         search_str = screen.findbuf + g_snprintf(screen.findbuf, WRLN_MAX_LINE_SIZE, "%s: ", JUMP_PROMPT);
 114         iter = search_str;
 115
 116         /* unfortunately wgetch returns "next/previous-page" not as an ascii-char */
 117         while(!g_ascii_iscntrl(key) && key != KEY_NPAGE && key != KEY_PPAGE) {
 118                 key = screen_getch(screen.findbuf);
 119                 /* if backspace or delete was pressed */
 120                 if (key == KEY_BACKSPACE || key == 330) {
 121                         int i;
 122                         /* don't end the loop */
 123                         key = 65;
 124                         if (search_str <= g_utf8_find_prev_char(screen.findbuf, iter))
 125                                 iter = g_utf8_find_prev_char(screen.findbuf, iter);
 126                         for (i = 0; *(iter + i) != '\0'; i++)
 127                                 *(iter + i) = '\0';
 128                         continue;
 129                 }
 130                 else {
 131                         *iter = key;
 132                         if (iter < screen.findbuf + WRLN_MAX_LINE_SIZE - 3)
 133                                 ++iter;
 134                 }
 135                 list_window_jump(lw, callback_fn, callback_data, search_str);
 136                 /* repaint the list_window */
 137                 list_window_paint(lw, callback_fn, callback_data);
 138                 wrefresh(lw->w);
 139         }
 140
 141         /* ncmpc should get the command */
 142         ungetch(key);
 143         if ((cmd=get_keyboard_command()) != CMD_NONE)
 144                 do_input_event(cmd);
 145 }