client/gui-sdl2/themes.c

   1 /***********************************************************************
   2  Freeciv - Copyright (C) 2005 The Freeciv Team
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; either version 2, or (at your option)
   6    any later version.
   7
   8    This program is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11    GNU General Public License for more details.
  12 ***********************************************************************/
  13 #ifdef HAVE_CONFIG_H
  14 #include <fc_config.h>
  15 #endif
  16
  17 #ifdef FREECIV_HAVE_DIRENT_H
  18 #include <dirent.h>
  19 #endif
  20
  21 #include <sys/stat.h>
  22
  23 /* utility */
  24 #include "fc_dirent.h"
  25 #include "fcintl.h"
  26 #include "log.h"
  27 #include "mem.h"
  28 #include "string_vector.h"
  29
  30 /* client/gui-sdl2 */
  31 #include "themespec.h"
  32
  33 #include "themes_common.h"
  34 #include "themes_g.h"
  35
  36 /*****************************************************************************
  37   Loads a gui-sdl2 theme directory/theme_name
  38 *****************************************************************************/
  39 void gui_load_theme(const char *directory, const char *theme_name)
  40 {
  41   char buf[strlen(directory) + strlen(DIR_SEPARATOR) + strlen(theme_name)
  42            + strlen(DIR_SEPARATOR "theme") + 1];
  43
  44   if (theme != NULL) {
  45     /* We don't support changing theme once it has been loaded */
  46     return;
  47   }
  48
  49   /* free previous loaded theme, if any */
  50   theme_free(theme);
  51   theme = NULL;
  52
  53   fc_snprintf(buf, sizeof(buf), "%s" DIR_SEPARATOR "%s" DIR_SEPARATOR "theme",
  54               directory, theme_name);
  55
  56   themespec_try_read(buf);
  57   theme_load_sprites(theme);
  58 }
  59
  60 /*****************************************************************************
  61   Clears a theme (sets default system theme)
  62 *****************************************************************************/
  63 void gui_clear_theme(void)
  64 {
  65   if (!load_theme(gui_options.gui_sdl2_default_theme_name)) {
  66     /* TRANS: No full stop after the URL, could cause confusion. */
  67     log_fatal(_("No Sdl2-client theme was found. For instructions on how to "
  68                 "get one, please visit %s"), WIKI_URL);
  69     exit(EXIT_FAILURE);
  70   }
  71 }
  72
  73 /*****************************************************************************
  74   Each gui has its own themes directories.
  75
  76   Returns an array containing these strings and sets array size in count.
  77   The caller is responsible for freeing the array and the paths.
  78 *****************************************************************************/
  79 char **get_gui_specific_themes_directories(int *count)
  80 {
  81   const struct strvec *data_dirs = get_data_dirs();
  82   char **directories = fc_malloc(strvec_size(data_dirs) * sizeof(char *));
  83   int i = 0;
  84
  85   *count = strvec_size(data_dirs);
  86   strvec_iterate(data_dirs, data_dir) {
  87     char buf[strlen(data_dir) + strlen("/themes/gui-sdl2") + 1];
  88
  89     fc_snprintf(buf, sizeof(buf), "%s/themes/gui-sdl2", data_dir);
  90
  91     directories[i++] = fc_strdup(buf);
  92   } strvec_iterate_end;
  93
  94   return directories;
  95 }
  96
  97 /*****************************************************************************
  98   Return an array of names of usable themes in the given directory.
  99   Array size is stored in count.
 100   Useable theme for gui-sdl2 is a directory which contains file theme.themespec.
 101   The caller is responsible for freeing the array and the names
 102 *****************************************************************************/
 103 char **get_useable_themes_in_directory(const char *directory, int *count)
 104 {
 105   DIR *dir;
 106   struct dirent *entry;
 107   char **theme_names = fc_malloc(sizeof(char *) * 2);
 108   /* Allocated memory size */
 109   int t_size = 2;
 110
 111   *count = 0;
 112
 113   dir = fc_opendir(directory);
 114   if (!dir) {
 115     /* This isn't directory or we can't list it */
 116     return theme_names;
 117   }
 118
 119   while ((entry = readdir(dir))) {
 120     char buf[strlen(directory) + strlen(entry->d_name) + 32];
 121     struct stat stat_result;
 122
 123     fc_snprintf(buf, sizeof(buf),
 124                 "%s/%s/theme.themespec", directory, entry->d_name);
 125
 126     if (fc_stat(buf, &stat_result) != 0) {
 127       /* File doesn't exist */
 128       continue;
 129     }
 130
 131     if (!S_ISREG(stat_result.st_mode)) {
 132       /* Not a regular file */
 133       continue;
 134     }
 135
 136     /* Otherwise it's ok */
 137
 138     /* Increase array size if needed */
 139     if (*count == t_size) {
 140       theme_names = fc_realloc(theme_names, t_size * 2 * sizeof(char *));
 141       t_size *= 2;
 142     }
 143
 144     theme_names[*count] = fc_strdup(entry->d_name);
 145     (*count)++;
 146   }
 147
 148   closedir(dir);
 149
 150   return theme_names;
 151 }