grub-core/gfxmenu/gfxmenu.c

   1 /* gfxmenu.c - Graphical menu interface controller. */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2008  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/types.h>
  21 #include <grub/misc.h>
  22 #include <grub/mm.h>
  23 #include <grub/err.h>
  24 #include <grub/dl.h>
  25 #include <grub/command.h>
  26 #include <grub/video.h>
  27 #include <grub/gfxterm.h>
  28 #include <grub/bitmap.h>
  29 #include <grub/bitmap_scale.h>
  30 #include <grub/term.h>
  31 #include <grub/env.h>
  32 #include <grub/normal.h>
  33 #include <grub/gfxwidgets.h>
  34 #include <grub/menu.h>
  35 #include <grub/menu_viewer.h>
  36 #include <grub/gfxmenu_model.h>
  37 #include <grub/gfxmenu_view.h>
  38 #include <grub/time.h>
  39 #include <grub/i18n.h>
  40
  41 GRUB_MOD_LICENSE ("GPLv3+");
  42
  43 static grub_gfxmenu_view_t cached_view;
  44
  45 static void
  46 grub_gfxmenu_viewer_fini (void *data __attribute__ ((unused)))
  47 {
  48 }
  49
  50 /* FIXME: Previously 't' changed to text menu is it necessary?  */
  51 static grub_err_t
  52 grub_gfxmenu_try (int entry, grub_menu_t menu, int nested)
  53 {
  54   grub_gfxmenu_view_t view = NULL;
  55   const char *theme_path;
  56   char *full_theme_path = 0;
  57   struct grub_menu_viewer *instance;
  58   grub_err_t err;
  59   struct grub_video_mode_info mode_info;
  60
  61   theme_path = grub_env_get ("theme");
  62   if (! theme_path)
  63     return grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("variable `%s' isn't set"),
  64                        "theme");
  65
  66   err = grub_video_get_info (&mode_info);
  67   if (err)
  68     return err;
  69
  70   instance = grub_zalloc (sizeof (*instance));
  71   if (!instance)
  72     return grub_errno;
  73
  74   if (theme_path[0] != '/' && theme_path[0] != '(')
  75     {
  76       const char *prefix;
  77       prefix = grub_env_get ("prefix");
  78       full_theme_path = grub_xasprintf ("%s/themes/%s",
  79                                         prefix,
  80                                         theme_path);
  81     }
  82
  83   if (!cached_view || grub_strcmp (cached_view->theme_path,
  84                                    full_theme_path ? : theme_path) != 0
  85       || cached_view->screen.width != mode_info.width
  86       || cached_view->screen.height != mode_info.height)
  87     {
  88       grub_gfxmenu_view_destroy (cached_view);
  89       /* Create the view.  */
  90       cached_view = grub_gfxmenu_view_new (full_theme_path ? : theme_path,
  91                                            mode_info.width,
  92                                            mode_info.height);
  93     }
  94   grub_free (full_theme_path);
  95
  96   if (! cached_view)
  97     {
  98       grub_free (instance);
  99       return grub_errno;
 100     }
 101
 102   view = cached_view;
 103
 104   view->double_repaint = (mode_info.mode_type
 105                           & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED)
 106     && !(mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
 107   view->selected = entry;
 108   view->menu = menu;
 109   view->nested = nested;
 110   view->first_timeout = -1;
 111
 112   grub_video_set_viewport (0, 0, mode_info.width, mode_info.height);
 113   if (view->double_repaint)
 114     {
 115       grub_video_swap_buffers ();
 116       grub_video_set_viewport (0, 0, mode_info.width, mode_info.height);
 117     }
 118
 119   grub_gfxmenu_view_draw (view);
 120
 121   instance->data = view;
 122   instance->set_chosen_entry = grub_gfxmenu_set_chosen_entry;
 123   instance->fini = grub_gfxmenu_viewer_fini;
 124   instance->print_timeout = grub_gfxmenu_print_timeout;
 125   instance->clear_timeout = grub_gfxmenu_clear_timeout;
 126
 127   grub_menu_register_viewer (instance);
 128
 129   return GRUB_ERR_NONE;
 130 }
 131
 132 GRUB_MOD_INIT (gfxmenu)
 133 {
 134   struct grub_term_output *term;
 135
 136   FOR_ACTIVE_TERM_OUTPUTS(term)
 137     if (grub_gfxmenu_try_hook && term->fullscreen)
 138       {
 139         term->fullscreen ();
 140         break;
 141       }
 142
 143   grub_gfxmenu_try_hook = grub_gfxmenu_try;
 144 }
 145
 146 GRUB_MOD_FINI (gfxmenu)
 147 {
 148   grub_gfxmenu_view_destroy (cached_view);
 149   grub_gfxmenu_try_hook = NULL;
 150 }