src/colors.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 "colors.h"
  21 #include "i18n.h"
  22 #ifdef ENABLE_COLORS
  23 #include "options.h"
  24 #endif
  25
  26 #include <assert.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <glib.h>
  31
  32 #define COLOR_NONE  G_MININT /* left most bit only */
  33 #define COLOR_ERROR -2
  34
  35 #ifdef ENABLE_COLORS
  36 typedef struct {
  37         short color;
  38         short r,g,b;
  39 } color_definition_entry_t;
  40 #endif
  41
  42 typedef struct {
  43         const char *name;
  44         int color;
  45         int mono;
  46 } color_entry_t;
  47
  48 static color_entry_t colors[COLOR_END] = {
  49         /* color pair = field name, color, mono */
  50         [COLOR_TITLE]        = {"title",             COLOR_YELLOW,          A_NORMAL},
  51         [COLOR_TITLE_BOLD]   = {"title-bold",        COLOR_YELLOW | A_BOLD, A_BOLD  },
  52         [COLOR_LINE]         = {"line",              COLOR_WHITE,           A_NORMAL},
  53         [COLOR_LINE_BOLD]    = {"line-bold",         COLOR_WHITE  | A_BOLD, A_BOLD  },
  54         [COLOR_LIST]         = {"list",              COLOR_GREEN,           A_NORMAL},
  55         [COLOR_LIST_BOLD]    = {"list-bold",         COLOR_GREEN  | A_BOLD, A_BOLD  },
  56         [COLOR_PROGRESSBAR]  = {"progressbar",       COLOR_WHITE,           A_NORMAL},
  57         [COLOR_STATUS]       = {"status-song",       COLOR_YELLOW,          A_NORMAL},
  58         [COLOR_STATUS_BOLD]  = {"status-state",      COLOR_YELLOW | A_BOLD, A_BOLD  },
  59         [COLOR_STATUS_TIME]  = {"status-time",       COLOR_RED,             A_NORMAL},
  60         [COLOR_STATUS_ALERT] = {"alert",             COLOR_RED    | A_BOLD, A_BOLD  },
  61         [COLOR_DIRECTORY]    = {"browser-directory", COLOR_YELLOW,          A_NORMAL},
  62         [COLOR_PLAYLIST]     = {"browser-playlist",  COLOR_RED,             A_NORMAL},
  63         [COLOR_BACKGROUND]   = {"background",        COLOR_BLACK,           A_NORMAL},
  64 };
  65
  66 #ifdef ENABLE_COLORS
  67
  68 static GList *color_definition_list = NULL;
  69
  70 static color_entry_t *
  71 colors_lookup_by_name(const char *name)
  72 {
  73         enum color i;
  74
  75         for (i = 1; i < COLOR_END; ++i)
  76                 if (!strcasecmp(colors[i].name, name))
  77                         return &colors[i];
  78
  79         return NULL;
  80 }
  81
  82 static int
  83 colors_update_pair(enum color id)
  84 {
  85         int fg, bg;
  86
  87         assert(id > 0 && id < COLOR_END);
  88
  89         fg = colors[id].color;
  90         bg = colors[COLOR_BACKGROUND].color;
  91
  92         /* If color == COLOR_NONE (negative),
  93          * pass -1 to avoid cast errors */
  94         init_pair(id,
  95                 (fg < 0 ? -1 : fg),
  96                 (bg < 0 ? -1 : bg));
  97         return 0;
  98 }
  99
 100 int
 101 colors_str2color(const char *str)
 102 {
 103         int i, color = 0;
 104         char **parts = g_strsplit(str, ",", 0);
 105         for (i = 0; parts[i]; i++) {
 106                 char *cur = parts[i];
 107
 108                 /* Legacy colors (brightblue,etc) */
 109                 if (!strncasecmp(cur, "bright", 6)) {
 110                         color |= A_BOLD;
 111                         cur += 6;
 112                 }
 113
 114                 /* Colors */
 115                 if (!strcasecmp(cur, "none"))
 116                         color |= COLOR_NONE;
 117                 else if (!strcasecmp(cur, "black"))
 118                         color |= COLOR_BLACK;
 119                 else if (!strcasecmp(cur, "red"))
 120                         color |= COLOR_RED;
 121                 else if (!strcasecmp(cur, "green"))
 122                         color |= COLOR_GREEN;
 123                 else if (!strcasecmp(cur, "yellow"))
 124                         color |= COLOR_YELLOW;
 125                 else if (!strcasecmp(cur, "blue"))
 126                         color |= COLOR_BLUE;
 127                 else if (!strcasecmp(cur, "magenta"))
 128                         color |= COLOR_MAGENTA;
 129                 else if (!strcasecmp(cur, "cyan"))
 130                         color |= COLOR_CYAN;
 131                 else if (!strcasecmp(cur, "white"))
 132                         color |= COLOR_WHITE;
 133                 else if (!strcasecmp(cur, "grey") || !strcasecmp(cur, "gray"))
 134                         color |= COLOR_BLACK | A_BOLD;
 135
 136                 /* Attributes */
 137                 else if (!strcasecmp(cur, "standout"))
 138                         color |= A_STANDOUT;
 139                 else if (!strcasecmp(cur, "underline"))
 140                         color |= A_UNDERLINE;
 141                 else if (!strcasecmp(cur, "reverse"))
 142                         color |= A_REVERSE;
 143                 else if (!strcasecmp(cur, "blink"))
 144                         color |= A_BLINK;
 145                 else if (!strcasecmp(cur, "dim"))
 146                         color |= A_DIM;
 147                 else if (!strcasecmp(cur, "bold"))
 148                         color |= A_BOLD;
 149                 else {
 150                         /* Numerical colors */
 151                         char *endptr;
 152                         int tmp = strtol(cur, &endptr, 10);
 153                         if (cur != endptr && endptr[0] == '\0') {
 154                                 color |= tmp;
 155                         } else {
 156                                 fprintf(stderr,_("Warning: Unknown color - %s\n"), str);
 157                                 return COLOR_ERROR;
 158                         }
 159                 }
 160
 161         }
 162         g_strfreev(parts);
 163         return color;
 164 }
 165
 166 /* This function is called from conf.c before curses have been started,
 167  * it adds the definition to the color_definition_list and init_color() is
 168  * done in colors_start() */
 169 int
 170 colors_define(const char *name, short r, short g, short b)
 171 {
 172         color_definition_entry_t *entry;
 173         int color = colors_str2color(name);
 174
 175         if (color < 0)
 176                 return color;
 177
 178         entry = g_malloc(sizeof(color_definition_entry_t));
 179         entry->color = color;
 180         entry->r = r;
 181         entry->g = g;
 182         entry->b = b;
 183
 184         color_definition_list = g_list_append(color_definition_list, entry);
 185
 186         return 0;
 187 }
 188
 189 int
 190 colors_assign(const char *name, const char *value)
 191 {
 192         color_entry_t *entry = colors_lookup_by_name(name);
 193         int color;
 194
 195         if (!entry) {
 196                 fprintf(stderr,_("Warning: Unknown color field - %s\n"), name);
 197                 return -1;
 198         }
 199
 200         if ((color = colors_str2color(value)) == COLOR_ERROR)
 201                 return -1;
 202
 203         entry->color = color;
 204         return 0;
 205 }
 206
 207
 208 int
 209 colors_start(void)
 210 {
 211         if (has_colors()) {
 212                 /* initialize color support */
 213                 start_color();
 214                 use_default_colors();
 215                 /* define any custom colors defined in the configuration file */
 216                 if (color_definition_list && can_change_color()) {
 217                         GList *list = color_definition_list;
 218
 219                         while (list) {
 220                                 color_definition_entry_t *entry = list->data;
 221
 222                                 if (entry->color <= COLORS)
 223                                         init_color(entry->color, entry->r,
 224                                                    entry->g, entry->b);
 225                                 list = list->next;
 226                         }
 227                 } else if (color_definition_list && !can_change_color())
 228                         fprintf(stderr, "%s\n",
 229                                 _("Terminal lacks support for changing colors"));
 230
 231                 if (options.enable_colors) {
 232                         enum color i;
 233
 234                         for (i = 1; i < COLOR_END; ++i)
 235                                 /* update the color pairs */
 236                                 colors_update_pair(i);
 237                 }
 238         } else if (options.enable_colors) {
 239                 fprintf(stderr, "%s\n",
 240                         _("Terminal lacks color capabilities"));
 241                 options.enable_colors = 0;
 242         }
 243
 244         /* free the color_definition_list */
 245         if (color_definition_list) {
 246                 GList *list = color_definition_list;
 247
 248                 while (list) {
 249                         g_free(list->data);
 250                         list=list->next;
 251                 }
 252
 253                 g_list_free(color_definition_list);
 254                 color_definition_list = NULL;
 255         }
 256
 257         return 0;
 258 }
 259 #endif
 260
 261 int
 262 colors_use(WINDOW *w, enum color id)
 263 {
 264         color_entry_t *entry = &colors[id];
 265         short pair;
 266         attr_t attrs;
 267
 268         assert(id > 0 && id < COLOR_END);
 269
 270         wattr_get(w, &attrs, &pair, NULL);
 271
 272 #ifdef ENABLE_COLORS
 273         if (options.enable_colors) {
 274                 /* color mode */
 275                 if ((int)attrs != entry->color || (short)id != pair)
 276                         wattr_set(w, entry->color, id, NULL);
 277         } else {
 278 #endif
 279                 /* mono mode */
 280                 if ((int)attrs != entry->mono)
 281                         (void)wattrset(w, entry->mono);
 282 #ifdef ENABLE_COLORS
 283         }
 284 #endif
 285
 286         return 0;
 287 }