src/screen_find.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2010 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(struct list_window *lw, command_t findcmd,
  35             list_window_callback_fn_t callback_fn,
  36             void *callback_data)
  37 {
  38         int reversed = 0;
  39         bool found;
  40         const char *prompt = FIND_PROMPT;
  41         char *value = options.find_show_last_pattern ? (char *) -1 : NULL;
  42
  43         if (findcmd == CMD_LIST_RFIND || findcmd == CMD_LIST_RFIND_NEXT) {
  44                 prompt = RFIND_PROMPT;
  45                 reversed = 1;
  46         }
  47
  48         switch (findcmd) {
  49         case CMD_LIST_FIND:
  50         case CMD_LIST_RFIND:
  51                 if (screen.findbuf) {
  52                         g_free(screen.findbuf);
  53                         screen.findbuf=NULL;
  54                 }
  55                 /* continue... */
  56
  57         case CMD_LIST_FIND_NEXT:
  58         case CMD_LIST_RFIND_NEXT:
  59                 if (!screen.findbuf)
  60                         screen.findbuf=screen_readln(prompt,
  61                                                      value,
  62                                                      &screen.find_history,
  63                                                      NULL);
  64
  65                 if (screen.findbuf == NULL)
  66                         return 1;
  67
  68                 found = reversed
  69                         ? list_window_rfind(lw,
  70                                             callback_fn, callback_data,
  71                                             screen.findbuf,
  72                                             options.find_wrap,
  73                                             options.bell_on_wrap)
  74                         : list_window_find(lw,
  75                                            callback_fn, callback_data,
  76                                            screen.findbuf,
  77                                            options.find_wrap,
  78                                            options.bell_on_wrap);
  79                 if (!found) {
  80                         screen_status_printf(_("Unable to find \'%s\'"),
  81                                              screen.findbuf);
  82                         screen_bell();
  83                 }
  84                 return 1;
  85         default:
  86                 break;
  87         }
  88         return 0;
  89 }
  90
  91 /* query user for a string and jump to the entry
  92  * which begins with this string while the users types */
  93 void
  94 screen_jump(struct list_window *lw,
  95                 list_window_callback_fn_t callback_fn,
  96             list_window_paint_callback_t paint_callback,
  97                 void *callback_data)
  98 {
  99         char *search_str, *iter, *temp;
 100         const int WRLN_MAX_LINE_SIZE = 1024;
 101         int key = 65;
 102         command_t cmd;
 103
 104         if (screen.findbuf) {
 105                 g_free(screen.findbuf);
 106                 screen.findbuf = NULL;
 107         }
 108         screen.findbuf = g_malloc0(WRLN_MAX_LINE_SIZE);
 109         /* In screen.findbuf is the whole string which is displayed in the status_window
 110          * and search_str is the string the user entered (without the prompt) */
 111         search_str = screen.findbuf + g_snprintf(screen.findbuf, WRLN_MAX_LINE_SIZE, "%s: ", JUMP_PROMPT);
 112         iter = search_str;
 113
 114         while(1) {
 115                 key = screen_getch(screen.findbuf);
 116                 /* if backspace or delete was pressed, process instead of ending loop */
 117                 if (key == 127 || key == 330) {
 118                         int i;
 119                         if (search_str <= g_utf8_find_prev_char(screen.findbuf, iter))
 120                                 iter = g_utf8_find_prev_char(screen.findbuf, iter);
 121                         for (i = 0; *(iter + i) != '\0'; i++)
 122                                 *(iter + i) = '\0';
 123                         continue;
 124                 }
 125                 /* if a control key was pressed, end loop */
 126                 else if (g_ascii_iscntrl(key) || key == KEY_NPAGE || key == KEY_PPAGE) {
 127                         break;
 128                 }
 129                 else {
 130                         *iter = key;
 131                         if (iter < screen.findbuf + WRLN_MAX_LINE_SIZE - 3)
 132                                 ++iter;
 133                 }
 134                 list_window_jump(lw, callback_fn, callback_data, search_str);
 135
 136                 /* repaint the list_window */
 137                 if (paint_callback != NULL)
 138                         list_window_paint2(lw, paint_callback, callback_data);
 139                 else
 140                         list_window_paint(lw, callback_fn, callback_data);
 141                 wrefresh(lw->w);
 142         }
 143
 144         /* ncmpc should get the command */
 145         ungetch(key);
 146         if ((cmd=get_keyboard_command()) != CMD_NONE)
 147                 do_input_event(cmd);
 148
 149         temp = g_strdup(search_str);
 150         g_free(screen.findbuf);
 151         screen.findbuf = temp;
 152 }