src/launcher/apps-common.c (raw)
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/************************************************************************** * Tint2 : .desktop file handling * * Copyright (C) 2015 (mrovi9000@gmail.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * 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. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. **************************************************************************/ /* http://standards.freedesktop.org/desktop-entry-spec/ */ #include "apps-common.h" #include "common.h" #include "strnatcmp.h" #include <glib.h> #include <stdio.h> #include <stdlib.h> #include <string.h> static gint compare_strings(gconstpointer a, gconstpointer b) { return strnatcasecmp((const char *)a, (const char *)b); } int parse_dektop_line(char *line, char **key, char **value) { char *p; int found = 0; *key = line; for (p = line; *p; p++) { if (*p == '=') { *value = p + 1; *p = 0; found = 1; break; } } if (!found) return 0; if (found && (strlen(*key) == 0 || strlen(*value) == 0)) return 0; return 1; } void expand_exec(DesktopEntry *entry, const char *path) { // Expand % in exec // %i -> --icon Icon // %c -> Name // %k -> path if (entry->exec) { char *exec2 = calloc(strlen(entry->exec) + (entry->name ? strlen(entry->name) : 1) + (entry->icon ? strlen(entry->icon) : 1) + 100, 1); char *p, *q; // p will never point to an escaped char for (p = entry->exec, q = exec2; *p; p++, q++) { *q = *p; // Copy if (*p == '\\') { p++, q++; // Copy the escaped char if (*p == '%') // For % we delete the backslash, i.e. write % over it q--; *q = *p; if (!*p) break; continue; } if (*p == '%') { p++; if (!*p) break; if (*p == 'i' && entry->icon != NULL) { sprintf(q, "--icon '%s'", entry->icon); q += strlen("--icon ''"); q += strlen(entry->icon); q--; // To balance the q++ in the for } else if (*p == 'c' && entry->name != NULL) { sprintf(q, "'%s'", entry->name); q += strlen("''"); q += strlen(entry->name); q--; // To balance the q++ in the for } else if (*p == 'c') { sprintf(q, "'%s'", path); q += strlen("''"); q += strlen(path); q--; // To balance the q++ in the for } else { // We don't care about other expansions q--; // Delete the last % from q } continue; } } *q = '\0'; free(entry->exec); entry->exec = exec2; } } gboolean read_desktop_file_full_path(const char *path, DesktopEntry *entry) { entry->name = entry->generic_name = entry->icon = entry->exec = entry->cwd = NULL; entry->hidden_from_menus = FALSE; FILE *fp = fopen(path, "rt"); if (fp == NULL) { fprintf(stderr, "Could not open file %s\n", path); return FALSE; } const gchar **languages = (const gchar **)g_get_language_names(); // lang_index is the index of the language for the best Name key in the language vector // lang_index_default is a constant that encodes the Name key without a language int lang_index_default = 1; #define LANG_DBG 0 if (LANG_DBG) printf("Languages:"); for (int i = 0; languages[i]; i++) { lang_index_default = i + 1; if (LANG_DBG) printf(" %s", languages[i]); } if (LANG_DBG) printf("\n"); // we currently do not know about any Name key at all, so use an invalid index int lang_index_name = lang_index_default + 1; int lang_index_generic_name = lang_index_default + 1; gboolean inside_desktop_entry = 0; char *line = NULL; size_t line_size; while (getline(&line, &line_size, fp) >= 0) { int len = strlen(line); if (len == 0) continue; if (line[len - 1] == '\n') line[len - 1] = '\0'; if (line[0] == '[') { inside_desktop_entry = (strcmp(line, "[Desktop Entry]") == 0); } char *key, *value; if (inside_desktop_entry && parse_dektop_line(line, &key, &value)) { if (strstr(key, "Name") == key) { if (strcmp(key, "Name") == 0 && lang_index_name > lang_index_default) { entry->name = strdup(value); lang_index_name = lang_index_default; } else { for (int i = 0; languages[i] && i < lang_index_name; i++) { gchar *localized_key = g_strdup_printf("Name[%s]", languages[i]); if (strcmp(key, localized_key) == 0) { if (entry->name) free(entry->name); entry->name = strdup(value); lang_index_name = i; } g_free(localized_key); } } } else if (strstr(key, "GenericName") == key) { if (strcmp(key, "GenericName") == 0 && lang_index_generic_name > lang_index_default) { entry->generic_name = strdup(value); lang_index_generic_name = lang_index_default; } else { for (int i = 0; languages[i] && i < lang_index_generic_name; i++) { gchar *localized_key = g_strdup_printf("GenericName[%s]", languages[i]); if (strcmp(key, localized_key) == 0) { if (entry->generic_name) free(entry->generic_name); entry->generic_name = strdup(value); lang_index_generic_name = i; } g_free(localized_key); } } } else if (!entry->exec && strcmp(key, "Exec") == 0) { entry->exec = strdup(value); } else if (!entry->cwd && strcmp(key, "Path") == 0) { entry->cwd = strdup(value); } else if (!entry->icon && strcmp(key, "Icon") == 0) { entry->icon = strdup(value); } else if (strcmp(key, "NoDisplay") == 0) { entry->hidden_from_menus = strcasecmp(value, "true") == 0; } } } fclose(fp); // From this point: // entry->name, entry->generic_name, entry->icon, entry->exec will never be empty strings (can be NULL though) expand_exec(entry, entry->path); free(line); return entry->exec != NULL; } gboolean read_desktop_file_from_dir(const char *path, const char *file_name, DesktopEntry *entry) { gchar *full_path = g_build_filename(path, file_name, NULL); if (read_desktop_file_full_path(full_path, entry)) { g_free(full_path); return TRUE; } free_and_null(entry->name); free_and_null(entry->generic_name); free_and_null(entry->icon); free_and_null(entry->exec); free_and_null(entry->cwd); GList *subdirs = NULL; GDir *d = g_dir_open(path, 0, NULL); if (d) { const gchar *name; while ((name = g_dir_read_name(d))) { gchar *child = g_build_filename(path, name, NULL); if (g_file_test(child, G_FILE_TEST_IS_DIR)) { subdirs = g_list_append(subdirs, child); } else { g_free(child); } } g_dir_close(d); } subdirs = g_list_sort(subdirs, compare_strings); gboolean found = FALSE; for (GList *l = subdirs; l; l = g_list_next(l)) { if (read_desktop_file_from_dir(l->data, file_name, entry)) { found = TRUE; break; } } for (GList *l = subdirs; l; l = g_list_next(l)) { g_free(l->data); } g_list_free(subdirs); g_free(full_path); return found; } gboolean read_desktop_file(const char *path, DesktopEntry *entry) { entry->path = strdup(path); entry->name = entry->generic_name = entry->icon = entry->exec = entry->cwd = NULL; if (strchr(path, '/')) return read_desktop_file_full_path(path, entry); for (const GSList *location = get_apps_locations(); location; location = g_slist_next(location)) { if (read_desktop_file_from_dir(location->data, path, entry)) return TRUE; } return FALSE; } void free_desktop_entry(DesktopEntry *entry) { free_and_null(entry->name); free_and_null(entry->generic_name); free_and_null(entry->icon); free_and_null(entry->exec); free_and_null(entry->path); free_and_null(entry->cwd); } void test_read_desktop_file() { fprintf(stdout, "\033[1;33m"); DesktopEntry entry; read_desktop_file("/usr/share/applications/firefox.desktop", &entry); printf("Name:%s GenericName:%s Icon:%s Exec:%s\n", entry.name, entry.generic_name, entry.icon, entry.exec); fprintf(stdout, "\033[0m"); } GSList *apps_locations = NULL; // Do not free the result. const GSList *get_apps_locations() { if (apps_locations) return apps_locations; apps_locations = load_locations_from_env(apps_locations, "XDG_DATA_HOME", "applications", NULL); apps_locations = g_slist_append(apps_locations, g_build_filename(g_get_home_dir(), ".local/share/applications", NULL)); apps_locations = load_locations_from_env(apps_locations, "XDG_DATA_DIRS", "applications", NULL); apps_locations = g_slist_append(apps_locations, g_strdup("/usr/local/share/applications")); apps_locations = g_slist_append(apps_locations, g_strdup("/usr/share/applications")); apps_locations = g_slist_append(apps_locations, g_strdup("/opt/share/applications")); apps_locations = slist_remove_duplicates(apps_locations, g_str_equal, g_free); return apps_locations; } |