client/gui-gtk-3.0/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 #include <dirent.h>
  18 #include <sys/stat.h>
  19 #include <sys/types.h>
  20 #include <unistd.h>
  21
  22 #include <gtk/gtk.h>
  23
  24 /* utility */
  25 #include "mem.h"
  26 #include "string_vector.h"
  27 #include "support.h"
  28
  29 /* client */
  30 #include "themes_common.h"
  31
  32 /* gui-gtk-3.0 */
  33 #include "gui_main.h"
  34
  35 #include "themes_g.h"
  36
  37 /*****************************************************************************
  38   Loads a gtk theme directory/theme_name
  39 *****************************************************************************/
  40 void gui_load_theme(const char *directory, const char *theme_name)
  41 {
  42   static GtkCssProvider *fc_css_provider = NULL;
  43   GError *error = NULL;
  44   char buf[strlen(directory) + strlen(theme_name) + 32];
  45
  46   if (fc_css_provider == NULL) {
  47     fc_css_provider = gtk_css_provider_new();
  48     gtk_style_context_add_provider(gtk_widget_get_style_context(toplevel),
  49         GTK_STYLE_PROVIDER(fc_css_provider),
  50         GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
  51   }
  52
  53   /* Gtk theme is a directory containing gtk-3.0/gtk.css file */
  54   fc_snprintf(buf, sizeof(buf), "%s/%s/gtk-3.0/gtk.css", directory,
  55               theme_name);
  56
  57   gtk_css_provider_load_from_file(fc_css_provider, g_file_new_for_path(buf), &error);
  58
  59   if (error) {
  60     g_warning("%s\n", error->message);
  61   }
  62
  63   gtk_style_context_invalidate(gtk_widget_get_style_context(toplevel));
  64 }
  65
  66 /*****************************************************************************
  67   Clears a theme (sets default system theme)
  68 *****************************************************************************/
  69 void gui_clear_theme(void)
  70 {
  71   bool theme_loaded;
  72
  73   /* try to load user defined theme */
  74   theme_loaded = load_theme(gui_options.gui_gtk3_default_theme_name);
  75
  76   /* no user defined theme loaded -> try to load Freeciv default theme */
  77   if (!theme_loaded) {
  78     theme_loaded = load_theme(FC_GTK3_DEFAULT_THEME_NAME);
  79     if (theme_loaded) {
  80       sz_strlcpy(gui_options.gui_gtk3_default_theme_name, FC_GTK3_DEFAULT_THEME_NAME);
  81     }
  82   }
  83
  84   /* still no theme loaded -> load system default theme */
  85   if (!theme_loaded) {
  86     gtk_style_context_add_provider_for_screen(
  87         gtk_widget_get_screen(toplevel),
  88         GTK_STYLE_PROVIDER(gtk_css_provider_get_default()),
  89         GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
  90   }
  91 }
  92
  93 /*****************************************************************************
  94   Each gui has its own themes directories.
  95   For gtk3 these are:
  96   - /usr/share/themes
  97   - ~/.themes
  98   Returns an array containing these strings and sets array size in count.
  99   The caller is responsible for freeing the array and the paths.
 100 *****************************************************************************/
 101 char **get_gui_specific_themes_directories(int *count)
 102 {
 103   gchar *standard_dir;
 104   char *home_dir;
 105   const struct strvec *data_dirs = get_data_dirs();
 106   char **directories = fc_malloc((2 + strvec_size(data_dirs))
 107                                  * sizeof(char *));
 108
 109   *count = 0;
 110
 111   /* Freeciv-specific GTK3 themes directories */
 112   strvec_iterate(data_dirs, dir_name) {
 113     char buf[strlen(dir_name) + strlen("/themes/gui-gtk-3.0") + 1];
 114
 115     fc_snprintf(buf, sizeof(buf), "%s/themes/gui-gtk-3.0", dir_name);
 116
 117     directories[(*count)++] = fc_strdup(buf);
 118   } strvec_iterate_end;
 119
 120   /* standard GTK+ themes directory */
 121 #ifdef CROSSER
 122   standard_dir = "../share/themes";
 123 #else  /* CROSSER */
 124   standard_dir = "/usr/share/themes";
 125 #endif /* CROSSER */
 126   directories[(*count)++] = fc_strdup(standard_dir);
 127
 128   /* user GTK+ themes directory (~/.themes) */
 129   home_dir = user_home_dir();
 130   if (home_dir) {
 131     char buf[strlen(home_dir) + 16];
 132
 133     fc_snprintf(buf, sizeof(buf), "%s/.themes/", home_dir);
 134     directories[(*count)++] = fc_strdup(buf);
 135   }
 136
 137   return directories;
 138 }
 139
 140 /*****************************************************************************
 141   Return an array of names of usable themes in the given directory.
 142   Array size is stored in count.
 143   Useable theme for gtk+ is a directory which contains file gtk-3.0/gtk.css.
 144   The caller is responsible for freeing the array and the names
 145 *****************************************************************************/
 146 char **get_useable_themes_in_directory(const char *directory, int *count)
 147 {
 148   DIR *dir;
 149   struct dirent *entry;
 150
 151   char **theme_names = fc_malloc(sizeof(char *) * 2);
 152   /* Allocated memory size */
 153   int t_size = 2;
 154
 155
 156   *count = 0;
 157
 158   dir = fc_opendir(directory);
 159   if (!dir) {
 160     /* This isn't directory or we can't list it */
 161     return theme_names;
 162   }
 163
 164   while ((entry = readdir(dir))) {
 165     char buf[strlen(directory) + strlen(entry->d_name) + 32];
 166     struct stat stat_result;
 167
 168     fc_snprintf(buf, sizeof(buf),
 169                 "%s/%s/gtk-3.0/gtk.css", directory, entry->d_name);
 170
 171     if (fc_stat(buf, &stat_result) != 0) {
 172       /* File doesn't exist */
 173       continue;
 174     }
 175
 176     if (!S_ISREG(stat_result.st_mode)) {
 177       /* Not a regular file */
 178       continue;
 179     }
 180
 181     /* Otherwise it's ok */
 182
 183     /* Increase array size if needed */
 184     if (*count == t_size) {
 185       theme_names = fc_realloc(theme_names, t_size * 2 * sizeof(char *));
 186       t_size *= 2;
 187     }
 188
 189     theme_names[*count] = fc_strdup(entry->d_name);
 190     (*count)++;
 191   }
 192
 193   closedir(dir);
 194
 195   return theme_names;
 196 }