src/screen_file.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2017 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_file.h"
  21 #include "screen_browser.h"
  22 #include "screen_interface.h"
  23 #include "screen_status.h"
  24 #include "screen_queue.h"
  25 #include "screen.h"
  26 #include "config.h"
  27 #include "i18n.h"
  28 #include "charset.h"
  29 #include "mpdclient.h"
  30 #include "filelist.h"
  31 #include "screen_utils.h"
  32 #include "screen_client.h"
  33 #include "options.h"
  34
  35 #include <mpd/client.h>
  36
  37 #include <ctype.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40 #include <glib.h>
  41
  42 static struct screen_browser browser;
  43 static char *current_path;
  44
  45 static void
  46 screen_file_load_list(struct mpdclient *c, struct filelist *filelist)
  47 {
  48         struct mpd_connection *connection;
  49
  50         connection = mpdclient_get_connection(c);
  51         if (connection == NULL)
  52                 return;
  53
  54         mpd_send_list_meta(connection, current_path);
  55         filelist_recv(filelist, connection);
  56
  57         if (mpdclient_finish_command(c))
  58                 filelist_sort_dir_play(filelist, compare_filelist_entry_path);
  59 }
  60
  61 static void
  62 screen_file_reload(struct mpdclient *c)
  63 {
  64         if (browser.filelist != NULL)
  65                 filelist_free(browser.filelist);
  66
  67         browser.filelist = filelist_new();
  68         if (*current_path != 0)
  69                 /* add a dummy entry for ./.. */
  70                 filelist_append(browser.filelist, NULL);
  71
  72         screen_file_load_list(c, browser.filelist);
  73
  74         list_window_set_length(browser.lw,
  75                                filelist_length(browser.filelist));
  76 }
  77
  78 /**
  79  * Change to the specified absolute directory.
  80  */
  81 static bool
  82 change_directory(struct mpdclient *c, const char *new_path)
  83 {
  84         g_free(current_path);
  85         current_path = g_strdup(new_path);
  86
  87         screen_file_reload(c);
  88
  89         screen_browser_sync_highlights(browser.filelist, &c->playlist);
  90
  91         list_window_reset(browser.lw);
  92
  93         return browser.filelist != NULL;
  94 }
  95
  96 /**
  97  * Change to the parent directory of the current directory.
  98  */
  99 static bool
 100 change_to_parent(struct mpdclient *c)
 101 {
 102         char *parent = g_path_get_dirname(current_path);
 103         if (strcmp(parent, ".") == 0)
 104                 parent[0] = '\0';
 105
 106         char *old_path = current_path;
 107         current_path = NULL;
 108
 109         bool success = change_directory(c, parent);
 110         g_free(parent);
 111
 112         int idx = success
 113                 ? filelist_find_directory(browser.filelist, old_path)
 114                 : -1;
 115         g_free(old_path);
 116
 117         if (success && idx >= 0) {
 118                 /* set the cursor on the previous working directory */
 119                 list_window_set_cursor(browser.lw, idx);
 120                 list_window_center(browser.lw, idx);
 121         }
 122
 123         return success;
 124 }
 125
 126 /**
 127  * Change to the directory referred by the specified #filelist_entry
 128  * object.
 129  */
 130 static bool
 131 change_to_entry(struct mpdclient *c, const struct filelist_entry *entry)
 132 {
 133         assert(entry != NULL);
 134
 135         if (entry->entity == NULL)
 136                 return change_to_parent(c);
 137         else if (mpd_entity_get_type(entry->entity) == MPD_ENTITY_TYPE_DIRECTORY)
 138                 return change_directory(c, mpd_directory_get_path(mpd_entity_get_directory(entry->entity)));
 139         else
 140                 return false;
 141 }
 142
 143 static bool
 144 screen_file_handle_enter(struct mpdclient *c)
 145 {
 146         const struct filelist_entry *entry = browser_get_selected_entry(&browser);
 147
 148         if (entry == NULL)
 149                 return false;
 150
 151         return change_to_entry(c, entry);
 152 }
 153
 154 static void
 155 handle_save(struct mpdclient *c)
 156 {
 157         struct list_window_range range;
 158         const char *defaultname = NULL;
 159
 160         list_window_get_range(browser.lw, &range);
 161         if (range.start == range.end)
 162                 return;
 163
 164         for (unsigned i = range.start; i < range.end; ++i) {
 165                 struct filelist_entry *entry =
 166                         filelist_get(browser.filelist, i);
 167                 if( entry && entry->entity ) {
 168                         struct mpd_entity *entity = entry->entity;
 169                         if (mpd_entity_get_type(entity) == MPD_ENTITY_TYPE_PLAYLIST) {
 170                                 const struct mpd_playlist *playlist =
 171                                         mpd_entity_get_playlist(entity);
 172                                 defaultname = mpd_playlist_get_path(playlist);
 173                         }
 174                 }
 175         }
 176
 177         char *defaultname_utf8 = NULL;
 178         if(defaultname)
 179                 defaultname_utf8 = utf8_to_locale(defaultname);
 180         playlist_save(c, NULL, defaultname_utf8);
 181         g_free(defaultname_utf8);
 182 }
 183
 184 static void
 185 handle_delete(struct mpdclient *c)
 186 {
 187         struct mpd_connection *connection = mpdclient_get_connection(c);
 188
 189         if (connection == NULL)
 190                 return;
 191
 192         struct list_window_range range;
 193         list_window_get_range(browser.lw, &range);
 194         for (unsigned i = range.start; i < range.end; ++i) {
 195                 struct filelist_entry *entry =
 196                         filelist_get(browser.filelist, i);
 197                 if( entry==NULL || entry->entity==NULL )
 198                         continue;
 199
 200                 struct mpd_entity *entity = entry->entity;
 201
 202                 if (mpd_entity_get_type(entity) != MPD_ENTITY_TYPE_PLAYLIST) {
 203                         /* translators: the "delete" command is only possible
 204                            for playlists; the user attempted to delete a song
 205                            or a directory or something else */
 206                         screen_status_printf(_("Deleting this item is not possible"));
 207                         screen_bell();
 208                         continue;
 209                 }
 210
 211                 const struct mpd_playlist *playlist = mpd_entity_get_playlist(entity);
 212                 char *str = utf8_to_locale(g_basename(mpd_playlist_get_path(playlist)));
 213                 char *buf = g_strdup_printf(_("Delete playlist %s [%s/%s] ? "), str, YES, NO);
 214                 g_free(str);
 215                 bool delete = screen_get_yesno(buf, false);
 216                 g_free(buf);
 217
 218                 if (!delete) {
 219                         /* translators: a dialog was aborted by the user */
 220                         screen_status_printf(_("Aborted"));
 221                         return;
 222                 }
 223
 224                 if (!mpd_run_rm(connection, mpd_playlist_get_path(playlist))) {
 225                         mpdclient_handle_error(c);
 226                         break;
 227                 }
 228
 229                 c->events |= MPD_IDLE_STORED_PLAYLIST;
 230
 231                 /* translators: MPD deleted the playlist, as requested by the
 232                    user */
 233                 screen_status_printf(_("Playlist deleted"));
 234         }
 235 }
 236
 237 static void
 238 screen_file_init(WINDOW *w, int cols, int rows)
 239 {
 240         current_path = g_strdup("");
 241
 242         browser.lw = list_window_init(w, cols, rows);
 243         browser.song_format = options.list_format;
 244 }
 245
 246 static void
 247 screen_file_resize(int cols, int rows)
 248 {
 249         list_window_resize(browser.lw, cols, rows);
 250 }
 251
 252 static void
 253 screen_file_exit(void)
 254 {
 255         if (browser.filelist)
 256                 filelist_free(browser.filelist);
 257         list_window_free(browser.lw);
 258
 259         g_free(current_path);
 260 }
 261
 262 static void
 263 screen_file_open(struct mpdclient *c)
 264 {
 265         screen_file_reload(c);
 266         screen_browser_sync_highlights(browser.filelist, &c->playlist);
 267 }
 268
 269 static const char *
 270 screen_file_get_title(char *str, size_t size)
 271 {
 272         const char *path = NULL, *prev = NULL, *slash = current_path;
 273
 274         /* determine the last 2 parts of the path */
 275         while ((slash = strchr(slash, '/')) != NULL) {
 276                 path = prev;
 277                 prev = ++slash;
 278         }
 279
 280         if (path == NULL)
 281                 /* fall back to full path */
 282                 path = current_path;
 283
 284         char *path_locale = utf8_to_locale(path);
 285         g_snprintf(str, size, "%s: %s",
 286                    /* translators: caption of the browser screen */
 287                    _("Browse"), path_locale);
 288         g_free(path_locale);
 289         return str;
 290 }
 291
 292 static void
 293 screen_file_paint(void)
 294 {
 295         screen_browser_paint(&browser);
 296 }
 297
 298 static void
 299 screen_file_update(struct mpdclient *c)
 300 {
 301         if (c->events & (MPD_IDLE_DATABASE | MPD_IDLE_STORED_PLAYLIST)) {
 302                 /* the db has changed -> update the filelist */
 303                 screen_file_reload(c);
 304         }
 305
 306         if (c->events & (MPD_IDLE_DATABASE | MPD_IDLE_STORED_PLAYLIST
 307 #ifndef NCMPC_MINI
 308                          | MPD_IDLE_QUEUE
 309 #endif
 310                          )) {
 311                 screen_browser_sync_highlights(browser.filelist, &c->playlist);
 312                 screen_file_paint();
 313         }
 314 }
 315
 316 static bool
 317 screen_file_cmd(struct mpdclient *c, command_t cmd)
 318 {
 319         switch(cmd) {
 320         case CMD_PLAY:
 321                 if (screen_file_handle_enter(c)) {
 322                         screen_file_paint();
 323                         return true;
 324                 }
 325
 326                 break;
 327
 328         case CMD_GO_ROOT_DIRECTORY:
 329                 change_directory(c, "");
 330                 screen_file_paint();
 331                 return true;
 332         case CMD_GO_PARENT_DIRECTORY:
 333                 change_to_parent(c);
 334                 screen_file_paint();
 335                 return true;
 336
 337         case CMD_LOCATE:
 338                 /* don't let browser_cmd() evaluate the locate command
 339                    - it's a no-op, and by the way, leads to a
 340                    segmentation fault in the current implementation */
 341                 return false;
 342
 343         case CMD_SCREEN_UPDATE:
 344                 screen_file_reload(c);
 345                 screen_browser_sync_highlights(browser.filelist, &c->playlist);
 346                 screen_file_paint();
 347                 return false;
 348
 349         default:
 350                 break;
 351         }
 352
 353         if (browser_cmd(&browser, c, cmd)) {
 354                 if (screen_is_visible(&screen_browse))
 355                         screen_file_paint();
 356                 return true;
 357         }
 358
 359         if (!mpdclient_is_connected(c))
 360                 return false;
 361
 362         switch(cmd) {
 363         case CMD_DELETE:
 364                 handle_delete(c);
 365                 screen_file_paint();
 366                 break;
 367
 368         case CMD_SAVE_PLAYLIST:
 369                 handle_save(c);
 370                 break;
 371
 372         case CMD_DB_UPDATE:
 373                 screen_database_update(c, current_path);
 374                 return true;
 375
 376         default:
 377                 break;
 378         }
 379
 380         return false;
 381 }
 382
 383 const struct screen_functions screen_browse = {
 384         .init = screen_file_init,
 385         .exit = screen_file_exit,
 386         .open = screen_file_open,
 387         .resize = screen_file_resize,
 388         .paint = screen_file_paint,
 389         .update = screen_file_update,
 390         .cmd = screen_file_cmd,
 391         .get_title = screen_file_get_title,
 392 };
 393
 394 bool
 395 screen_file_goto_song(struct mpdclient *c, const struct mpd_song *song)
 396 {
 397         const char *uri, *slash, *parent;
 398         char *allocated = NULL;
 399
 400         assert(song != NULL);
 401
 402         uri = mpd_song_get_uri(song);
 403
 404         if (strstr(uri, "//") != NULL)
 405                 /* an URL? */
 406                 return false;
 407
 408         /* determine the song's parent directory and go there */
 409
 410         slash = strrchr(uri, '/');
 411         if (slash != NULL)
 412                 parent = allocated = g_strndup(uri, slash - uri);
 413         else
 414                 parent = "";
 415
 416         bool ret = change_directory(c, parent);
 417         g_free(allocated);
 418         if (!ret)
 419                 return false;
 420
 421         /* select the specified song */
 422
 423         int i = filelist_find_song(browser.filelist, song);
 424         if (i < 0)
 425                 i = 0;
 426
 427         list_window_set_cursor(browser.lw, i);
 428
 429         /* finally, switch to the file screen */
 430         screen_switch(&screen_browse, c);
 431         return true;
 432 }