GRUB2/MOD_SRC/grub-2.04/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/env.h>
  40 #include <grub/i18n.h>
  41
  42 GRUB_MOD_LICENSE ("GPLv3+");
  43
  44 extern int g_ventoy_menu_refresh;
  45
  46 static grub_gfxmenu_view_t cached_view;
  47
  48 static void
  49 grub_gfxmenu_viewer_fini (void *data __attribute__ ((unused)))
  50 {
  51 }
  52
  53 /* FIXME: Previously 't' changed to text menu is it necessary?  */
  54 static grub_err_t
  55 grub_gfxmenu_try (int entry, grub_menu_t menu, int nested)
  56 {
  57   int force_refresh = 0;
  58   grub_gfxmenu_view_t view = NULL;
  59   const char *theme_path;
  60   char *full_theme_path = 0;
  61   struct grub_menu_viewer *instance;
  62   grub_err_t err;
  63   struct grub_video_mode_info mode_info;
  64
  65   theme_path = grub_env_get ("theme");
  66   if (! theme_path)
  67     return grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("variable `%s' isn't set"),
  68                        "theme");
  69
  70   err = grub_video_get_info (&mode_info);
  71   if (err)
  72     return err;
  73
  74   instance = grub_zalloc (sizeof (*instance));
  75   if (!instance)
  76     return grub_errno;
  77
  78   if (theme_path[0] != '/' && theme_path[0] != '(')
  79     {
  80       const char *prefix;
  81       prefix = grub_env_get ("prefix");
  82       full_theme_path = grub_xasprintf ("%s/themes/%s",
  83                                         prefix,
  84                                         theme_path);
  85     }
  86
  87   if (g_ventoy_menu_refresh)
  88   {
  89       g_ventoy_menu_refresh = 0;
  90       force_refresh = 1;
  91   }
  92
  93   if (force_refresh ||
  94       !cached_view || grub_strcmp (cached_view->theme_path,
  95                                    full_theme_path ? : theme_path) != 0
  96       || cached_view->screen.width != mode_info.width
  97       || cached_view->screen.height != mode_info.height)
  98     {
  99       grub_gfxmenu_view_destroy (cached_view);
 100       /* Create the view.  */
 101       cached_view = grub_gfxmenu_view_new (full_theme_path ? : theme_path,
 102                                            mode_info.width,
 103                                            mode_info.height);
 104     }
 105   grub_free (full_theme_path);
 106
 107   if (! cached_view)
 108     {
 109       grub_free (instance);
 110       return grub_errno;
 111     }
 112
 113   view = cached_view;
 114
 115   view->double_repaint = (mode_info.mode_type
 116                           & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED)
 117     && !(mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
 118   view->selected = entry;
 119   view->menu = menu;
 120   view->nested = nested;
 121   view->first_timeout = -1;
 122
 123   grub_video_set_viewport (0, 0, mode_info.width, mode_info.height);
 124   if (view->double_repaint)
 125     {
 126       grub_video_swap_buffers ();
 127       grub_video_set_viewport (0, 0, mode_info.width, mode_info.height);
 128     }
 129
 130   grub_gfxmenu_view_draw (view);
 131
 132   instance->data = view;
 133   instance->set_chosen_entry = grub_gfxmenu_set_chosen_entry;
 134   instance->fini = grub_gfxmenu_viewer_fini;
 135   instance->print_timeout = grub_gfxmenu_print_timeout;
 136   instance->clear_timeout = grub_gfxmenu_clear_timeout;
 137
 138   grub_menu_register_viewer (instance);
 139
 140   return GRUB_ERR_NONE;
 141 }
 142
 143 GRUB_MOD_INIT (gfxmenu)
 144 {
 145   struct grub_term_output *term;
 146
 147   FOR_ACTIVE_TERM_OUTPUTS(term)
 148     if (grub_gfxmenu_try_hook && term->fullscreen)
 149       {
 150         term->fullscreen ();
 151         break;
 152       }
 153
 154   grub_gfxmenu_try_hook = grub_gfxmenu_try;
 155 }
 156
 157 GRUB_MOD_FINI (gfxmenu)
 158 {
 159   grub_gfxmenu_view_destroy (cached_view);
 160   grub_gfxmenu_try_hook = NULL;
 161 }