src/screen_help.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_help.h"
  21 #include "screen_interface.h"
  22 #include "screen_find.h"
  23 #include "paint.h"
  24 #include "charset.h"
  25 #include "config.h"
  26 #include "i18n.h"
  27
  28 #include <glib.h>
  29
  30 #include <assert.h>
  31
  32 struct help_text_row {
  33         signed char highlight;
  34         command_t command;
  35         const char *text;
  36 };
  37
  38 static const struct help_text_row help_text[] = {
  39         { 1, CMD_NONE, N_("Movement") },
  40         { 2, CMD_NONE, NULL },
  41         { 0, CMD_LIST_PREVIOUS, NULL },
  42         { 0, CMD_LIST_NEXT, NULL },
  43         { 0, CMD_LIST_TOP, NULL },
  44         { 0, CMD_LIST_MIDDLE, NULL },
  45         { 0, CMD_LIST_BOTTOM, NULL },
  46         { 0, CMD_LIST_PREVIOUS_PAGE, NULL },
  47         { 0, CMD_LIST_NEXT_PAGE, NULL },
  48         { 0, CMD_LIST_FIRST, NULL },
  49         { 0, CMD_LIST_LAST, NULL },
  50         { 0, CMD_LIST_RANGE_SELECT, NULL },
  51         { 0, CMD_LIST_SCROLL_UP_LINE, NULL},
  52         { 0, CMD_LIST_SCROLL_DOWN_LINE, NULL},
  53         { 0, CMD_LIST_SCROLL_UP_HALF, NULL},
  54         { 0, CMD_LIST_SCROLL_DOWN_HALF, NULL},
  55         { 0, CMD_NONE, NULL },
  56
  57         { 0, CMD_SCREEN_PREVIOUS,NULL },
  58         { 0, CMD_SCREEN_NEXT, NULL },
  59         { 0, CMD_SCREEN_SWAP, NULL },
  60         { 0, CMD_SCREEN_HELP, NULL },
  61         { 0, CMD_SCREEN_PLAY, NULL },
  62         { 0, CMD_SCREEN_FILE, NULL },
  63 #ifdef ENABLE_ARTIST_SCREEN
  64         { 0, CMD_SCREEN_ARTIST, NULL },
  65 #endif
  66 #ifdef ENABLE_SEARCH_SCREEN
  67         { 0, CMD_SCREEN_SEARCH, NULL },
  68 #endif
  69 #ifdef ENABLE_LYRICS_SCREEN
  70         { 0, CMD_SCREEN_LYRICS, NULL },
  71 #endif
  72 #ifdef ENABLE_OUTPUTS_SCREEN
  73         { 0, CMD_SCREEN_OUTPUTS, NULL },
  74 #endif
  75 #ifdef ENABLE_KEYDEF_SCREEN
  76         { 0, CMD_SCREEN_KEYDEF, NULL },
  77 #endif
  78
  79         { 0, CMD_NONE, NULL },
  80         { 0, CMD_NONE, NULL },
  81         { 1, CMD_NONE, N_("Global") },
  82         { 2, CMD_NONE, NULL },
  83         { 0, CMD_STOP, NULL },
  84         { 0, CMD_PAUSE, NULL },
  85         { 0, CMD_CROP, NULL },
  86         { 0, CMD_TRACK_NEXT, NULL },
  87         { 0, CMD_TRACK_PREVIOUS, NULL },
  88         { 0, CMD_SEEK_FORWARD, NULL },
  89         { 0, CMD_SEEK_BACKWARD, NULL },
  90         { 0, CMD_VOLUME_DOWN, NULL },
  91         { 0, CMD_VOLUME_UP, NULL },
  92         { 0, CMD_NONE, NULL },
  93         { 0, CMD_REPEAT, NULL },
  94         { 0, CMD_RANDOM, NULL },
  95         { 0, CMD_SINGLE, NULL },
  96         { 0, CMD_CONSUME, NULL },
  97         { 0, CMD_CROSSFADE, NULL },
  98         { 0, CMD_SHUFFLE, NULL },
  99         { 0, CMD_DB_UPDATE, NULL },
 100         { 0, CMD_NONE, NULL },
 101         { 0, CMD_LIST_FIND, NULL },
 102         { 0, CMD_LIST_RFIND, NULL },
 103         { 0, CMD_LIST_FIND_NEXT, NULL },
 104         { 0, CMD_LIST_RFIND_NEXT, NULL },
 105         { 0, CMD_LIST_JUMP, NULL },
 106         { 0, CMD_TOGGLE_FIND_WRAP, NULL },
 107         { 0, CMD_LOCATE, NULL },
 108 #ifdef ENABLE_SONG_SCREEN
 109         { 0, CMD_SCREEN_SONG, NULL },
 110 #endif
 111         { 0, CMD_NONE, NULL },
 112         { 0, CMD_QUIT, NULL },
 113
 114         { 0, CMD_NONE, NULL },
 115         { 0, CMD_NONE, NULL },
 116         { 1, CMD_NONE, N_("Playlist screen") },
 117         { 2, CMD_NONE, NULL },
 118         { 0, CMD_PLAY, N_("Play") },
 119         { 0, CMD_DELETE, NULL },
 120         { 0, CMD_CLEAR, NULL },
 121         { 0, CMD_LIST_MOVE_UP, N_("Move song up") },
 122         { 0, CMD_LIST_MOVE_DOWN, N_("Move song down") },
 123         { 0, CMD_ADD, NULL },
 124         { 0, CMD_SAVE_PLAYLIST, NULL },
 125         { 0, CMD_SCREEN_UPDATE, N_("Center") },
 126         { 0, CMD_SELECT_PLAYING, NULL },
 127         { 0, CMD_TOGGLE_AUTOCENTER, NULL },
 128
 129         { 0, CMD_NONE, NULL },
 130         { 0, CMD_NONE, NULL },
 131         { 1, CMD_NONE, N_("Browse screen") },
 132         { 2, CMD_NONE, NULL },
 133         { 0, CMD_PLAY, N_("Enter directory/Select and play song") },
 134         { 0, CMD_SELECT, NULL },
 135         { 0, CMD_ADD, N_("Append song to playlist") },
 136         { 0, CMD_SAVE_PLAYLIST, NULL },
 137         { 0, CMD_DELETE, N_("Delete playlist") },
 138         { 0, CMD_GO_PARENT_DIRECTORY, NULL },
 139         { 0, CMD_GO_ROOT_DIRECTORY, NULL },
 140         { 0, CMD_SCREEN_UPDATE, NULL },
 141
 142 #ifdef ENABLE_SEARCH_SCREEN
 143         { 0, CMD_NONE, NULL },
 144         { 0, CMD_NONE, NULL },
 145         { 1, CMD_NONE, N_("Search screen") },
 146         { 2, CMD_NONE, NULL },
 147         { 0, CMD_SCREEN_SEARCH, N_("Search") },
 148         { 0, CMD_PLAY, N_("Select and play") },
 149         { 0, CMD_SELECT, NULL },
 150         { 0, CMD_ADD, N_("Append song to playlist") },
 151         { 0, CMD_SELECT_ALL,     NULL },
 152         { 0, CMD_SEARCH_MODE, NULL },
 153 #endif
 154 #ifdef ENABLE_LYRICS_SCREEN
 155         { 0, CMD_NONE, NULL },
 156         { 0, CMD_NONE, NULL },
 157         { 1, CMD_NONE, N_("Lyrics screen") },
 158         { 2, CMD_NONE, NULL },
 159         { 0, CMD_SCREEN_LYRICS, N_("View Lyrics") },
 160         { 0, CMD_SELECT, N_("(Re)load lyrics") },
 161         /* to translators: this hotkey aborts the retrieval of lyrics
 162            from the server */
 163         { 0, CMD_INTERRUPT, N_("Interrupt retrieval") },
 164         { 0, CMD_LYRICS_UPDATE, N_("Download lyrics for currently playing song") },
 165         { 0, CMD_SAVE_PLAYLIST, N_("Save lyrics") },
 166         { 0, CMD_DELETE, N_("Delete saved lyrics") },
 167 #endif
 168 #ifdef ENABLE_OUTPUTS_SCREEN
 169         { 0, CMD_NONE, NULL },
 170         { 0, CMD_NONE, NULL },
 171         { 1, CMD_NONE, N_("Outputs screen") },
 172         { 2, CMD_NONE, NULL },
 173         { 0, CMD_PLAY, N_("Enable/disable output") },
 174 #endif
 175 #ifdef ENABLE_KEYDEF_SCREEN
 176         { 0, CMD_NONE, NULL },
 177         { 0, CMD_NONE, NULL },
 178         { 1, CMD_NONE, N_("Keydef screen") },
 179         { 2, CMD_NONE, NULL },
 180         { 0, CMD_PLAY, N_("Edit keydefs for selected command") },
 181         { 0, CMD_DELETE, N_("Remove selected keydef") },
 182         { 0, CMD_GO_PARENT_DIRECTORY, N_("Go up a level") },
 183         { 0, CMD_SAVE_PLAYLIST, N_("Apply and save changes") },
 184 #endif
 185 };
 186
 187 static struct list_window *lw;
 188
 189 static const char *
 190 list_callback(unsigned i, G_GNUC_UNUSED void *data)
 191 {
 192         const struct help_text_row *row = &help_text[i];
 193
 194         assert(i < G_N_ELEMENTS(help_text));
 195
 196         if (row->text != NULL)
 197                 return _(row->text);
 198
 199         if (row->command != CMD_NONE)
 200                 return get_key_description(row->command);
 201
 202         return "";
 203 }
 204
 205 static void
 206 help_init(WINDOW *w, int cols, int rows)
 207 {
 208         lw = list_window_init(w, cols, rows);
 209         lw->hide_cursor = true;
 210         list_window_set_length(lw, G_N_ELEMENTS(help_text));
 211 }
 212
 213 static void
 214 help_resize(int cols, int rows)
 215 {
 216         list_window_resize(lw, cols, rows);
 217 }
 218
 219 static void
 220 help_exit(void)
 221 {
 222         list_window_free(lw);
 223 }
 224
 225
 226 static const char *
 227 help_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 228 {
 229         return _("Help");
 230 }
 231
 232 static void
 233 screen_help_paint_callback(WINDOW *w, unsigned i,
 234                            unsigned y, unsigned width,
 235                            G_GNUC_UNUSED bool selected,
 236                            G_GNUC_UNUSED void *data)
 237 {
 238         const struct help_text_row *row = &help_text[i];
 239
 240         assert(i < G_N_ELEMENTS(help_text));
 241
 242         row_color(w, row->highlight ? COLOR_LIST_BOLD : COLOR_LIST, false);
 243
 244         wclrtoeol(w);
 245
 246         if (row->command == CMD_NONE) {
 247                 if (row->text != NULL)
 248                         mvwaddstr(w, y, 6, _(row->text));
 249                 else if (row->highlight == 2)
 250                         mvwhline(w, y, 3, '-', width - 6);
 251         } else {
 252                 const char *key = get_key_names(row->command, true);
 253
 254                 if (utf8_width(key) < 20)
 255                         wmove(w, y, 20 - utf8_width(key));
 256                 waddstr(w, key);
 257                 mvwaddch(w, y, 21, ':');
 258                 mvwaddstr(w, y, 23,
 259                           row->text != NULL
 260                           ? _(row->text)
 261                           : get_key_description(row->command));
 262         }
 263 }
 264
 265 static void
 266 help_paint(void)
 267 {
 268         list_window_paint2(lw, screen_help_paint_callback, NULL);
 269 }
 270
 271 static bool
 272 help_cmd(G_GNUC_UNUSED struct mpdclient *c, command_t cmd)
 273 {
 274         if (list_window_scroll_cmd(lw, cmd)) {
 275                 help_paint();
 276                 wrefresh(lw->w);
 277                 return true;
 278         }
 279
 280         list_window_set_cursor(lw, lw->start);
 281         if (screen_find(lw,  cmd, list_callback, NULL)) {
 282                 /* center the row */
 283                 list_window_center(lw, lw->selected);
 284                 help_paint();
 285                 wrefresh(lw->w);
 286                 return true;
 287         }
 288
 289         return false;
 290 }
 291
 292 const struct screen_functions screen_help = {
 293         .init = help_init,
 294         .exit = help_exit,
 295         .resize = help_resize,
 296         .paint = help_paint,
 297         .cmd = help_cmd,
 298         .get_title = help_title,
 299 };