themes.c

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/***********************************************************************
 Freeciv - Copyright (C) 2005 The Freeciv Team
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
***********************************************************************/
#ifdef HAVE_CONFIG_H
#include <fc_config.h>
#endif
 
#ifdef FREECIV_HAVE_DIRENT_H
#include <dirent.h>
#endif
 
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
 
#include <gtk/gtk.h>
 
/* utility */
#include "fc_dirent.h"
#include "mem.h"
#include "string_vector.h"
 
/* client */
#include "themes_common.h"
 
/* gui-gtk-4.0 */
#include "gui_main.h"
 
#include "themes_g.h"
 
static GtkCssProvider *theme_provider = NULL;
 
/*************************************************************************/
void gui_load_theme(const char *directory, const char *theme_name)
{
  char buf[strlen(directory) + strlen(theme_name) + 32];
 
  if (theme_provider == NULL) {
    theme_provider = gtk_css_provider_new();
    gtk_style_context_add_provider_for_display(
        gtk_widget_get_display(toplevel),
        GTK_STYLE_PROVIDER(theme_provider),
        GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
  }
 
  /* Gtk theme is a directory containing gtk-4.0/gtk.css file */
  fc_snprintf(buf, sizeof(buf), "%s/%s/gtk-4.0/gtk.css", directory,
              theme_name);
 
  gtk_css_provider_load_from_path(theme_provider, buf);
}
 
/*************************************************************************/
void gui_clear_theme(void)
{
  bool theme_loaded;
 
  /* Try to load user defined theme */
  theme_loaded = load_theme(GUI_GTK_OPTION(default_theme_name));
 
  /* No user defined theme loaded -> try to load Freeciv default theme */
  if (!theme_loaded) {
    theme_loaded = load_theme(GUI_GTK_DEFAULT_THEME_NAME);
    if (theme_loaded) {
      sz_strlcpy(GUI_GTK_OPTION(default_theme_name), GUI_GTK_DEFAULT_THEME_NAME);
    }
  }
 
  /* Still no theme loaded -> drop theme provider */
  if (!theme_loaded && theme_provider != NULL) {
    gtk_style_context_remove_provider_for_display(
        gtk_widget_get_display(toplevel),
        GTK_STYLE_PROVIDER(theme_provider));
    theme_provider = NULL;
  }
}
 
/*************************************************************************/
char **get_gui_specific_themes_directories(int *count)
{
  gchar *standard_dir;
  char *home_dir;
  const struct strvec *data_dirs = get_data_dirs();
  char **directories = fc_malloc((2 + strvec_size(data_dirs))
                                 * sizeof(char *));
 
  *count = 0;
 
  /* Freeciv-specific GTK4 themes directories */
  strvec_iterate(data_dirs, dir_name) {
    char buf[strlen(dir_name) + strlen("/themes/gtk4") + 1];
 
    fc_snprintf(buf, sizeof(buf), "%s/themes/gtk4", dir_name);
 
    directories[(*count)++] = fc_strdup(buf);
  } strvec_iterate_end;
 
  /* standard GTK themes directory */
#ifdef CROSSER
  standard_dir = "../share/themes";
#else  /* CROSSER */
  standard_dir = "/usr/share/themes";
#endif /* CROSSER */
  directories[(*count)++] = fc_strdup(standard_dir);
 
  /* user GTK themes directory (~/.themes) */
  home_dir = user_home_dir();
  if (home_dir) {
    char buf[strlen(home_dir) + 16];
 
    fc_snprintf(buf, sizeof(buf), "%s/.themes/", home_dir);
    directories[(*count)++] = fc_strdup(buf);
  }
 
  return directories;
}
 
/*************************************************************************/
char **get_usable_themes_in_directory(const char *directory, int *count)
{
  DIR *dir;
  struct dirent *entry;
  char **theme_names = fc_malloc(sizeof(char *) * 2);
  /* Allocated memory size */
  int t_size = 2;
 
 
  *count = 0;
 
  dir = fc_opendir(directory);
  if (!dir) {
    /* This isn't directory or we can't list it */
    return theme_names;
  }
 
  while ((entry = readdir(dir))) {
    char buf[strlen(directory) + strlen(entry->d_name) + 32];
    struct stat stat_result;
 
    fc_snprintf(buf, sizeof(buf),
                "%s/%s/gtk-4.0/gtk.css", directory, entry->d_name);
 
    if (fc_stat(buf, &stat_result) != 0) {
      /* File doesn't exist */
      continue;
    }
 
    if (!S_ISREG(stat_result.st_mode)) {
      /* Not a regular file */
      continue;
    }
 
    /* Otherwise it's ok */
 
    /* Increase array size if needed */
    if (*count == t_size) {
      theme_names = fc_realloc(theme_names, t_size * 2 * sizeof(char *));
      t_size *= 2;
    }
 
    theme_names[*count] = fc_strdup(entry->d_name);
    (*count)++;
  }
 
  closedir(dir);
 
  return theme_names;
}