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_CHAT_SCREEN
  76         { 0, CMD_SCREEN_CHAT, NULL },
  77 #endif
  78 #ifdef ENABLE_KEYDEF_SCREEN
  79         { 0, CMD_SCREEN_KEYDEF, NULL },
  80 #endif
  81
  82         { 0, CMD_NONE, NULL },
  83         { 0, CMD_NONE, NULL },
  84         { 1, CMD_NONE, N_("Global") },
  85         { 2, CMD_NONE, NULL },
  86         { 0, CMD_STOP, NULL },
  87         { 0, CMD_PAUSE, NULL },
  88         { 0, CMD_CROP, NULL },
  89         { 0, CMD_TRACK_NEXT, NULL },
  90         { 0, CMD_TRACK_PREVIOUS, NULL },
  91         { 0, CMD_SEEK_FORWARD, NULL },
  92         { 0, CMD_SEEK_BACKWARD, NULL },
  93         { 0, CMD_VOLUME_DOWN, NULL },
  94         { 0, CMD_VOLUME_UP, NULL },
  95         { 0, CMD_NONE, NULL },
  96         { 0, CMD_REPEAT, NULL },
  97         { 0, CMD_RANDOM, NULL },
  98         { 0, CMD_SINGLE, NULL },
  99         { 0, CMD_CONSUME, NULL },
 100         { 0, CMD_CROSSFADE, NULL },
 101         { 0, CMD_SHUFFLE, NULL },
 102         { 0, CMD_DB_UPDATE, NULL },
 103         { 0, CMD_NONE, NULL },
 104         { 0, CMD_LIST_FIND, NULL },
 105         { 0, CMD_LIST_RFIND, NULL },
 106         { 0, CMD_LIST_FIND_NEXT, NULL },
 107         { 0, CMD_LIST_RFIND_NEXT, NULL },
 108         { 0, CMD_LIST_JUMP, NULL },
 109         { 0, CMD_TOGGLE_FIND_WRAP, NULL },
 110         { 0, CMD_LOCATE, NULL },
 111 #ifdef ENABLE_SONG_SCREEN
 112         { 0, CMD_SCREEN_SONG, NULL },
 113 #endif
 114         { 0, CMD_NONE, NULL },
 115         { 0, CMD_QUIT, NULL },
 116
 117         { 0, CMD_NONE, NULL },
 118         { 0, CMD_NONE, NULL },
 119         { 1, CMD_NONE, N_("Queue screen") },
 120         { 2, CMD_NONE, NULL },
 121         { 0, CMD_PLAY, N_("Play") },
 122         { 0, CMD_DELETE, NULL },
 123         { 0, CMD_CLEAR, NULL },
 124         { 0, CMD_LIST_MOVE_UP, N_("Move song up") },
 125         { 0, CMD_LIST_MOVE_DOWN, N_("Move song down") },
 126         { 0, CMD_ADD, NULL },
 127         { 0, CMD_SAVE_PLAYLIST, NULL },
 128         { 0, CMD_SCREEN_UPDATE, N_("Center") },
 129         { 0, CMD_SELECT_PLAYING, NULL },
 130         { 0, CMD_TOGGLE_AUTOCENTER, NULL },
 131
 132         { 0, CMD_NONE, NULL },
 133         { 0, CMD_NONE, NULL },
 134         { 1, CMD_NONE, N_("Browse screen") },
 135         { 2, CMD_NONE, NULL },
 136         { 0, CMD_PLAY, N_("Enter directory/Select and play song") },
 137         { 0, CMD_SELECT, NULL },
 138         { 0, CMD_ADD, N_("Append song to queue") },
 139         { 0, CMD_SAVE_PLAYLIST, NULL },
 140         { 0, CMD_DELETE, N_("Delete playlist") },
 141         { 0, CMD_GO_PARENT_DIRECTORY, NULL },
 142         { 0, CMD_GO_ROOT_DIRECTORY, NULL },
 143         { 0, CMD_SCREEN_UPDATE, NULL },
 144
 145 #ifdef ENABLE_SEARCH_SCREEN
 146         { 0, CMD_NONE, NULL },
 147         { 0, CMD_NONE, NULL },
 148         { 1, CMD_NONE, N_("Search screen") },
 149         { 2, CMD_NONE, NULL },
 150         { 0, CMD_SCREEN_SEARCH, N_("Search") },
 151         { 0, CMD_PLAY, N_("Select and play") },
 152         { 0, CMD_SELECT, NULL },
 153         { 0, CMD_ADD, N_("Append song to queue") },
 154         { 0, CMD_SELECT_ALL,     NULL },
 155         { 0, CMD_SEARCH_MODE, NULL },
 156 #endif
 157 #ifdef ENABLE_LYRICS_SCREEN
 158         { 0, CMD_NONE, NULL },
 159         { 0, CMD_NONE, NULL },
 160         { 1, CMD_NONE, N_("Lyrics screen") },
 161         { 2, CMD_NONE, NULL },
 162         { 0, CMD_SCREEN_LYRICS, N_("View Lyrics") },
 163         { 0, CMD_SELECT, N_("(Re)load lyrics") },
 164         /* to translators: this hotkey aborts the retrieval of lyrics
 165            from the server */
 166         { 0, CMD_INTERRUPT, N_("Interrupt retrieval") },
 167         { 0, CMD_LYRICS_UPDATE, N_("Download lyrics for currently playing song") },
 168         { 0, CMD_EDIT, N_("Add or edit lyrics") },
 169         { 0, CMD_SAVE_PLAYLIST, N_("Save lyrics") },
 170         { 0, CMD_DELETE, N_("Delete saved lyrics") },
 171 #endif
 172 #ifdef ENABLE_OUTPUTS_SCREEN
 173         { 0, CMD_NONE, NULL },
 174         { 0, CMD_NONE, NULL },
 175         { 1, CMD_NONE, N_("Outputs screen") },
 176         { 2, CMD_NONE, NULL },
 177         { 0, CMD_PLAY, N_("Enable/disable output") },
 178 #endif
 179 #ifdef ENABLE_CHAT_SCREEN
 180         { 0, CMD_NONE, NULL },
 181         { 0, CMD_NONE, NULL },
 182         { 1, CMD_NONE, N_("Chat screen") },
 183         { 2, CMD_NONE, NULL },
 184         { 0, CMD_PLAY, N_("Write a message") },
 185 #endif
 186 #ifdef ENABLE_KEYDEF_SCREEN
 187         { 0, CMD_NONE, NULL },
 188         { 0, CMD_NONE, NULL },
 189         { 1, CMD_NONE, N_("Keydef screen") },
 190         { 2, CMD_NONE, NULL },
 191         { 0, CMD_PLAY, N_("Edit keydefs for selected command") },
 192         { 0, CMD_DELETE, N_("Remove selected keydef") },
 193         { 0, CMD_ADD, N_("Add a keydef") },
 194         { 0, CMD_GO_PARENT_DIRECTORY, N_("Go up a level") },
 195         { 0, CMD_SAVE_PLAYLIST, N_("Apply and save changes") },
 196 #endif
 197 };
 198
 199 static struct list_window *lw;
 200
 201 static const char *
 202 list_callback(unsigned i, G_GNUC_UNUSED void *data)
 203 {
 204         const struct help_text_row *row = &help_text[i];
 205
 206         assert(i < G_N_ELEMENTS(help_text));
 207
 208         if (row->text != NULL)
 209                 return _(row->text);
 210
 211         if (row->command != CMD_NONE)
 212                 return get_key_description(row->command);
 213
 214         return "";
 215 }
 216
 217 static void
 218 help_init(WINDOW *w, int cols, int rows)
 219 {
 220         lw = list_window_init(w, cols, rows);
 221         lw->hide_cursor = true;
 222         list_window_set_length(lw, G_N_ELEMENTS(help_text));
 223 }
 224
 225 static void
 226 help_resize(int cols, int rows)
 227 {
 228         list_window_resize(lw, cols, rows);
 229 }
 230
 231 static void
 232 help_exit(void)
 233 {
 234         list_window_free(lw);
 235 }
 236
 237
 238 static const char *
 239 help_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 240 {
 241         return _("Help");
 242 }
 243
 244 static void
 245 screen_help_paint_callback(WINDOW *w, unsigned i,
 246                            unsigned y, unsigned width,
 247                            G_GNUC_UNUSED bool selected,
 248                            G_GNUC_UNUSED void *data)
 249 {
 250         const struct help_text_row *row = &help_text[i];
 251
 252         assert(i < G_N_ELEMENTS(help_text));
 253
 254         row_color(w, row->highlight ? COLOR_LIST_BOLD : COLOR_LIST, false);
 255
 256         wclrtoeol(w);
 257
 258         if (row->command == CMD_NONE) {
 259                 if (row->text != NULL)
 260                         mvwaddstr(w, y, 6, _(row->text));
 261                 else if (row->highlight == 2)
 262                         mvwhline(w, y, 3, '-', width - 6);
 263         } else {
 264                 const char *key = get_key_names(row->command, true);
 265
 266                 if (utf8_width(key) < 20)
 267                         wmove(w, y, 20 - utf8_width(key));
 268                 waddstr(w, key);
 269                 mvwaddch(w, y, 21, ':');
 270                 mvwaddstr(w, y, 23,
 271                           row->text != NULL
 272                           ? _(row->text)
 273                           : get_key_description(row->command));
 274         }
 275 }
 276
 277 static void
 278 help_paint(void)
 279 {
 280         list_window_paint2(lw, screen_help_paint_callback, NULL);
 281 }
 282
 283 static bool
 284 help_cmd(G_GNUC_UNUSED struct mpdclient *c, command_t cmd)
 285 {
 286         if (list_window_scroll_cmd(lw, cmd)) {
 287                 help_paint();
 288                 wrefresh(lw->w);
 289                 return true;
 290         }
 291
 292         list_window_set_cursor(lw, lw->start);
 293         if (screen_find(lw,  cmd, list_callback, NULL)) {
 294                 /* center the row */
 295                 list_window_center(lw, lw->selected);
 296                 help_paint();
 297                 wrefresh(lw->w);
 298                 return true;
 299         }
 300
 301         return false;
 302 }
 303
 304 const struct screen_functions screen_help = {
 305         .init = help_init,
 306         .exit = help_exit,
 307         .resize = help_resize,
 308         .paint = help_paint,
 309         .cmd = help_cmd,
 310         .get_title = help_title,
 311 };