arch/all-pc/boot/grub2-aros/grub-core/normal/color.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004,2008  Free Software Foundation, Inc.
   4  *
   5  *  GRUB 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 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB 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
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/misc.h>
  20 #include <grub/mm.h>
  21 #include <grub/normal.h>
  22 #include <grub/term.h>
  23 #include <grub/i18n.h>
  24
  25 /* Borrowed from GRUB Legacy */
  26 static const char *color_list[16] =
  27 {
  28   "black",
  29   "blue",
  30   "green",
  31   "cyan",
  32   "red",
  33   "magenta",
  34   "brown",
  35   "light-gray",
  36   "dark-gray",
  37   "light-blue",
  38   "light-green",
  39   "light-cyan",
  40   "light-red",
  41   "light-magenta",
  42   "yellow",
  43   "white"
  44 };
  45
  46 static int
  47 parse_color_name (grub_uint8_t *ret, char *name)
  48 {
  49   grub_uint8_t i;
  50   for (i = 0; i < sizeof (color_list) / sizeof (*color_list); i++)
  51     if (! grub_strcmp (name, color_list[i]))
  52       {
  53         *ret = i;
  54         return 0;
  55       }
  56   return -1;
  57 }
  58
  59 int
  60 grub_parse_color_name_pair (grub_uint8_t *color, const char *name)
  61 {
  62   int result = 1;
  63   grub_uint8_t fg, bg;
  64   char *fg_name, *bg_name;
  65
  66   /* nothing specified by user */
  67   if (name == NULL)
  68     return result;
  69
  70   fg_name = grub_strdup (name);
  71   if (fg_name == NULL)
  72     {
  73       /* "out of memory" message was printed by grub_strdup() */
  74       grub_wait_after_message ();
  75       return result;
  76     }
  77
  78   bg_name = grub_strchr (fg_name, '/');
  79   if (bg_name == NULL)
  80     {
  81       grub_printf_ (N_("Warning: syntax error (missing slash) in `%s'\n"), fg_name);
  82       grub_wait_after_message ();
  83       goto free_and_return;
  84     }
  85
  86   *(bg_name++) = '\0';
  87
  88   if (parse_color_name (&fg, fg_name) == -1)
  89     {
  90       grub_printf_ (N_("Warning: invalid foreground color `%s'\n"), fg_name);
  91       grub_wait_after_message ();
  92       goto free_and_return;
  93     }
  94   if (parse_color_name (&bg, bg_name) == -1)
  95     {
  96       grub_printf_ (N_("Warning: invalid background color `%s'\n"), bg_name);
  97       grub_wait_after_message ();
  98       goto free_and_return;
  99     }
 100
 101   *color = (bg << 4) | fg;
 102   result = 0;
 103
 104 free_and_return:
 105   grub_free (fg_name);
 106   return result;
 107 }
 108
 109 static grub_uint8_t color_normal, color_highlight;
 110
 111 static void
 112 set_colors (void)
 113 {
 114   struct grub_term_output *term;
 115
 116   FOR_ACTIVE_TERM_OUTPUTS(term)
 117   {
 118     /* Reloads terminal `normal' and `highlight' colors.  */
 119     grub_term_setcolor (term, color_normal, color_highlight);
 120
 121     /* Propagates `normal' color to terminal current color.  */
 122     grub_term_setcolorstate (term, GRUB_TERM_COLOR_NORMAL);
 123   }
 124 }
 125
 126 /* Replace default `normal' colors with the ones specified by user (if any).  */
 127 char *
 128 grub_env_write_color_normal (struct grub_env_var *var __attribute__ ((unused)),
 129                              const char *val)
 130 {
 131   if (grub_parse_color_name_pair (&color_normal, val))
 132     return NULL;
 133
 134   set_colors ();
 135
 136   return grub_strdup (val);
 137 }
 138
 139 /* Replace default `highlight' colors with the ones specified by user (if any).  */
 140 char *
 141 grub_env_write_color_highlight (struct grub_env_var *var __attribute__ ((unused)),
 142                                 const char *val)
 143 {
 144   if (grub_parse_color_name_pair (&color_highlight, val))
 145     return NULL;
 146
 147   set_colors ();
 148
 149   return grub_strdup (val);
 150 }