+/***************** Freedesktop app.desktop and icon theme handling *********************/
+/* http://standards.freedesktop.org/desktop-entry-spec/ */
+/* http://standards.freedesktop.org/icon-theme-spec/ */
+
+// Splits line at first '=' and returns 1 if successful, and parts are not empty
+// key and value point to the parts
+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;
+}
+
+int parse_theme_line(char *line, char **key, char **value)
+{
+ return parse_dektop_line(line, key, value);
+}
+
+void expand_exec(DesktopEntry *entry, const char *path)
+{
+ // Expand % in exec
+ // %i -> --icon Icon
+ // %c -> Name
+ // %k -> path
+ if (entry->exec) {
+ char *exec2 = malloc(strlen(entry->exec) + (entry->name ? strlen(entry->name) : 1) + (entry->icon ? strlen(entry->icon) : 1) + 100);
+ 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;
+ }
+}
+
+//TODO Use UTF8 when parsing the file
+int launcher_read_desktop_file(const char *path, DesktopEntry *entry)
+{
+ FILE *fp;
+ char line[4096];
+ char *key, *value;
+
+ entry->name = entry->icon = entry->exec = NULL;
+
+ if ((fp = fopen(path, "rt")) == NULL) {
+ fprintf(stderr, "Could not open file %s\n", path);
+ return 0;
+ }
+
+ while (fgets(line, sizeof(line), fp) != NULL) {
+ int len = strlen(line);
+ if (len == 0)
+ continue;
+ line[len - 1] = '\0';
+ if (parse_dektop_line(line, &key, &value)) {
+ if (strcmp(key, "Name") == 0) {
+ entry->name = strdup(value);
+ } else if (strcmp(key, "Exec") == 0) {
+ entry->exec = strdup(value);
+ } else if (strcmp(key, "Icon") == 0) {
+ entry->icon = strdup(value);
+ }
+ }
+ }
+ fclose (fp);
+ // From this point:
+ // entry->name, entry->icon, entry->exec will never be empty strings (can be NULL though)
+
+ expand_exec(entry, path);
+
+ return 1;
+}
+
+void free_desktop_entry(DesktopEntry *entry)
+{
+ free(entry->name);
+ free(entry->icon);
+ free(entry->exec);
+}
+
+void test_launcher_read_desktop_file()
+{
+ fprintf(stdout, "\033[1;33m");
+ DesktopEntry entry;
+ launcher_read_desktop_file("/usr/share/applications/firefox.desktop", &entry);
+ printf("Name:%s Icon:%s Exec:%s\n", entry.name, entry.icon, entry.exec);
+ fprintf(stdout, "\033[0m");
+}
+
+//TODO Use UTF8 when parsing the file
+IconTheme *load_theme(char *name)
+{
+ // Look for name/index.theme in $HOME/.icons, /usr/share/icons, /usr/share/pixmaps (stop at the first found)
+ // Parse index.theme -> list of IconThemeDir with attributes
+ // Return IconTheme*
+
+ IconTheme *theme;
+ char *file_name;
+ FILE *f;
+ char line[2048];
+
+ if (name == NULL)
+ return NULL;
+
+ file_name = g_build_filename(g_get_home_dir(), ".icons", name, "index.theme", NULL);
+ if (!g_file_test(file_name, G_FILE_TEST_EXISTS)) {
+ g_free (file_name);
+ file_name = g_build_filename("/usr/share/icons", name, "index.theme", NULL);
+ if (!g_file_test(file_name, G_FILE_TEST_EXISTS)) {
+ g_free (file_name);
+ file_name = g_build_filename("/usr/share/pixmaps", name, "index.theme", NULL);
+ if (!g_file_test(file_name, G_FILE_TEST_EXISTS)) {
+ g_free (file_name);
+ file_name = NULL;
+ }
+ }
+ }
+
+ if (!file_name) {
+ fprintf(stderr, "Could not found theme '%s'\n", name);
+ return NULL;
+ }
+
+ if ((f = fopen(file_name, "rt")) == NULL) {
+ fprintf(stderr, "Could not open theme '%s'\n", file_name);
+ return NULL;
+ }
+ else
+ fprintf(stderr, "Loading icon theme '%s'\n", file_name);
+
+ g_free (file_name);
+
+ theme = calloc(1, sizeof(IconTheme));
+ theme->name = strdup(name);
+ theme->list_inherits = NULL;
+ theme->list_directories = NULL;
+
+ IconThemeDir *current_dir = NULL;
+ int inside_header = 1;
+ while (fgets(line, sizeof(line), f) != NULL) {
+ char *key, *value;
+
+ int line_len = strlen(line);
+ if (line_len >= 1) {
+ if (line[line_len - 1] == '\n') {
+ line[line_len - 1] = '\0';
+ line_len--;
+ }
+ }
+
+ if (line_len == 0)
+ continue;
+
+ if (inside_header) {
+ if (parse_theme_line(line, &key, &value)) {
+ if (strcmp(key, "Inherits") == 0) {
+ // value is like oxygen,wood,default
+ char *token;
+ token = strtok(value, ",\n");
+ while (token != NULL)
+ {
+ theme->list_inherits = g_slist_append(theme->list_inherits, strdup(token));
+ token = strtok(NULL, ",\n");
+ }
+ } else if (strcmp(key, "Directories") == 0) {
+ // value is like 48x48/apps,48x48/mimetypes,32x32/apps,scalable/apps,scalable/mimetypes
+ char *token;
+ token = strtok(value, ",\n");
+ while (token != NULL)
+ {
+ IconThemeDir *dir = calloc(1, sizeof(IconThemeDir));
+ dir->name = strdup(token);
+ dir->max_size = dir->min_size = dir->size = -1;
+ dir->type = ICON_DIR_TYPE_THRESHOLD;
+ dir->threshold = 2;
+ theme->list_directories = g_slist_append(theme->list_directories, dir);
+ token = strtok(NULL, ",\n");
+ }
+ }
+ }
+ } else if (current_dir != NULL) {
+ if (parse_theme_line(line, &key, &value)) {
+ if (strcmp(key, "Size") == 0) {
+ // value is like 24
+ sscanf(value, "%d", ¤t_dir->size);
+ if (current_dir->max_size == -1)
+ current_dir->max_size = current_dir->size;
+ if (current_dir->min_size == -1)
+ current_dir->min_size = current_dir->size;
+ } else if (strcmp(key, "MaxSize") == 0) {
+ // value is like 24
+ sscanf(value, "%d", ¤t_dir->max_size);
+ } else if (strcmp(key, "MinSize") == 0) {
+ // value is like 24
+ sscanf(value, "%d", ¤t_dir->min_size);
+ } else if (strcmp(key, "Threshold") == 0) {
+ // value is like 2
+ sscanf(value, "%d", ¤t_dir->threshold);
+ } else if (strcmp(key, "Type") == 0) {
+ // value is Fixed, Scalable or Threshold : default to scalable for unknown Type.
+ if (strcmp(value, "Fixed") == 0) {
+ current_dir->type = ICON_DIR_TYPE_FIXED;
+ } else if (strcmp(value, "Threshold") == 0) {
+ current_dir->type = ICON_DIR_TYPE_THRESHOLD;
+ } else {
+ current_dir->type = ICON_DIR_TYPE_SCALABLE;
+ }
+ } else if (strcmp(key, "Context") == 0) {
+ // usual values: Actions, Applications, Devices, FileSystems, MimeTypes
+ current_dir->context = strdup(value);
+ }
+ }
+ }
+
+ if (line[0] == '[' && line[line_len - 1] == ']' && strcmp(line, "[Icon Theme]") != 0) {
+ inside_header = 0;
+ current_dir = NULL;
+ line[line_len - 1] = '\0';
+ char *dir_name = line + 1;
+ GSList* dir_item = theme->list_directories;
+ while (dir_item != NULL)
+ {
+ IconThemeDir *dir = dir_item->data;
+ if (strcmp(dir->name, dir_name) == 0) {
+ current_dir = dir;
+ break;
+ }
+ dir_item = g_slist_next(dir_item);
+ }
+ }
+ }
+ fclose(f);
+
+ return theme;
+}
+
+void free_icon_theme(IconTheme *theme)
+{
+ free(theme->name);
+ GSList *l_inherits;
+ for (l_inherits = theme->list_inherits; l_inherits ; l_inherits = l_inherits->next) {
+ free(l_inherits->data);
+ }
+ GSList *l_dir;
+ for (l_dir = theme->list_directories; l_dir ; l_dir = l_dir->next) {
+ IconThemeDir *dir = (IconThemeDir *)l_dir->data;
+ free(dir->name);
+ free(dir->context);
+ free(l_dir->data);
+ }
+}
+
+void test_launcher_read_theme_file()
+{
+ fprintf(stdout, "\033[1;33m");
+ IconTheme *theme = load_theme("oxygen");
+ if (!theme) {
+ printf("Could not load theme\n");
+ return;
+ }
+ printf("Loaded theme: %s\n", theme->name);
+ GSList* item = theme->list_inherits;
+ while (item != NULL)
+ {
+ printf("Inherits:%s\n", (char*)item->data);
+ item = g_slist_next(item);
+ }
+ item = theme->list_directories;
+ while (item != NULL)
+ {
+ IconThemeDir *dir = item->data;
+ printf("Dir:%s Size=%d MinSize=%d MaxSize=%d Threshold=%d Type=%s Context=%s\n",
+ dir->name, dir->size, dir->min_size, dir->max_size, dir->threshold,
+ dir->type == ICON_DIR_TYPE_FIXED ? "Fixed" :
+ dir->type == ICON_DIR_TYPE_SCALABLE ? "Scalable" :
+ dir->type == ICON_DIR_TYPE_THRESHOLD ? "Threshold" : "?????",
+ dir->context);
+ item = g_slist_next(item);
+ }
+ fprintf(stdout, "\033[0m");
+}
+
+// Populates the icon_themes list
+void launcher_load_themes(Launcher *launcher)
+{
+ // load the user theme, all the inherited themes recursively (DFS), and the hicolor theme
+ // avoid inheritance loops
+
+ GSList *queue = NULL;
+ GSList *queued = NULL;
+
+ GSList* icon_theme_name_item;
+ for (icon_theme_name_item = launcher->icon_theme_names; icon_theme_name_item; icon_theme_name_item = g_slist_next(icon_theme_name_item)) {
+ int duplicate = 0;
+ GSList* queued_item = queued;
+ while (queued_item != NULL) {
+ if (strcmp(queued_item->data, icon_theme_name_item->data) == 0) {
+ duplicate = 1;
+ break;
+ }
+ queued_item = g_slist_next(queued_item);
+ }
+ if (!duplicate) {
+ queue = g_slist_append(queue, strdup(icon_theme_name_item->data));
+ queued = g_slist_append(queued, strdup(icon_theme_name_item->data));
+ }
+ }
+
+ int hicolor_loaded = 0;
+ while (queue || !hicolor_loaded) {
+ if (!queue) {
+ GSList* queued_item = queued;
+ while (queued_item != NULL) {
+ if (strcmp(queued_item->data, "hicolor") == 0) {
+ hicolor_loaded = 1;
+ break;
+ }
+ queued_item = g_slist_next(queued_item);
+ }
+ if (hicolor_loaded)
+ break;
+ queue = g_slist_append(queue, strdup("hicolor"));
+ queued = g_slist_append(queued, strdup("hicolor"));
+ }
+
+ char *name = queue->data;
+ queue = g_slist_remove(queue, name);
+
+ IconTheme *theme = load_theme(name);
+ if (theme != NULL) {
+ launcher->icon_themes = g_slist_append(launcher->icon_themes, theme);
+
+ GSList* item = theme->list_inherits;
+ int pos = 0;
+ while (item != NULL)
+ {
+ char *parent = item->data;
+ int duplicate = 0;
+ GSList* queued_item = queued;
+ while (queued_item != NULL) {
+ if (strcmp(queued_item->data, parent) == 0) {
+ duplicate = 1;
+ break;
+ }
+ queued_item = g_slist_next(queued_item);
+ }
+ if (!duplicate) {
+ queue = g_slist_insert(queue, strdup(parent), pos);
+ pos++;
+ queued = g_slist_append(queued, strdup(parent));
+ }
+ item = g_slist_next(item);
+ }
+ }
+ }
+
+ // Free the queue
+ GSList *l;
+ for (l = queue; l ; l = l->next)
+ free(l->data);
+ g_slist_free(queue);
+ for (l = queued; l ; l = l->next)
+ free(l->data);
+ g_slist_free(queued);
+}
+
+int directory_matches_size(IconThemeDir *dir, int size)
+{
+ if (dir->type == ICON_DIR_TYPE_FIXED) {
+ return dir->size == size;
+ } else if (dir->type == ICON_DIR_TYPE_SCALABLE) {
+ return dir->min_size <= size && size <= dir->max_size;
+ } else /*if (dir->type == ICON_DIR_TYPE_THRESHOLD)*/ {
+ return dir->size - dir->threshold <= size && size <= dir->size + dir->threshold;
+ }
+}
+
+int directory_size_distance(IconThemeDir *dir, int size)
+{
+ if (dir->type == ICON_DIR_TYPE_FIXED) {
+ return abs(dir->size - size);
+ } else if (dir->type == ICON_DIR_TYPE_SCALABLE) {
+ if (size < dir->min_size) {
+ return dir->min_size - size;
+ } else if (size > dir->max_size) {
+ return size - dir->max_size;
+ } else {
+ return 0;
+ }
+ } else /*if (dir->type == ICON_DIR_TYPE_THRESHOLD)*/ {
+ if (size < dir->size - dir->threshold) {
+ return dir->min_size - size;
+ } else if (size > dir->size + dir->threshold) {
+ return size - dir->max_size;
+ } else {
+ return 0;
+ }
+ }
+}
+
+// Returns the full path to an icon file (or NULL) given the icon name
+char *icon_path(Launcher *launcher, const char *icon_name, int size)
+{
+ if (icon_name == NULL)
+ return NULL;
+
+ // If the icon_name is already a path and the file exists, return it
+ if (strstr(icon_name, "/") == icon_name) {
+ if (g_file_test(icon_name, G_FILE_TEST_EXISTS))
+ return strdup(icon_name);
+ else
+ return NULL;
+ }
+
+ GSList *basenames = NULL;
+ char *file_name = g_build_filename(g_get_home_dir(), ".icons", NULL);
+ basenames = g_slist_append(basenames, file_name);
+ basenames = g_slist_append(basenames, "/usr/share/icons");
+ basenames = g_slist_append(basenames, "/usr/share/pixmaps");
+
+ GSList *extensions = NULL;
+ extensions = g_slist_append(extensions, "png");
+ extensions = g_slist_append(extensions, "xpm");
+
+ // Stage 1: exact size match
+ GSList *theme;
+ for (theme = launcher->icon_themes; theme; theme = g_slist_next(theme)) {
+ GSList *dir;
+ for (dir = ((IconTheme*)theme->data)->list_directories; dir; dir = g_slist_next(dir)) {
+ if (directory_matches_size((IconThemeDir*)dir->data, size)) {
+ GSList *base;
+ for (base = basenames; base; base = g_slist_next(base)) {
+ GSList *ext;
+ for (ext = extensions; ext; ext = g_slist_next(ext)) {
+ char *base_name = (char*) base->data;
+ char *theme_name = ((IconTheme*)theme->data)->name;
+ char *dir_name = ((IconThemeDir*)dir->data)->name;
+ char *extension = (char*) ext->data;
+ char *file_name = malloc(strlen(base_name) + strlen(theme_name) +
+ strlen(dir_name) + strlen(icon_name) + strlen(extension) + 100);
+ // filename = directory/$(themename)/subdirectory/iconname.extension
+ sprintf(file_name, "%s/%s/%s/%s.%s", base_name, theme_name, dir_name, icon_name, extension);
+ //printf("checking %s\n", file_name);
+ if (g_file_test(file_name, G_FILE_TEST_EXISTS)) {
+ g_slist_free(basenames);
+ g_slist_free(extensions);
+ return file_name;
+ } else {
+ free(file_name);
+ file_name = NULL;
+ }
+ }
+ }
+ }
+ }
+ }
+ g_free (file_name);
+
+ // Stage 2: best size match
+ // Contrary to the freedesktop spec, we are not choosing the closest icon in size, but the next larger icon
+ // otherwise the quality is usually crap (for size 22, if you can choose 16 or 32, you're better with 32)
+ // We do fallback to the closest size if we cannot find a larger or equal icon
+ int minimal_size = INT_MAX;
+ char *best_file_name = NULL;
+ int next_larger_size = -1;
+ char *next_larger = NULL;
+ for (theme = launcher->icon_themes; theme; theme = g_slist_next(theme)) {
+ GSList *dir;
+ for (dir = ((IconTheme*)theme->data)->list_directories; dir; dir = g_slist_next(dir)) {
+ GSList *base;
+ for (base = basenames; base; base = g_slist_next(base)) {
+ GSList *ext;
+ for (ext = extensions; ext; ext = g_slist_next(ext)) {
+ char *base_name = (char*) base->data;
+ char *theme_name = ((IconTheme*)theme->data)->name;
+ char *dir_name = ((IconThemeDir*)dir->data)->name;
+ char *extension = (char*) ext->data;
+ char *file_name = malloc(strlen(base_name) + strlen(theme_name) +
+ strlen(dir_name) + strlen(icon_name) + strlen(extension) + 100);
+ // filename = directory/$(themename)/subdirectory/iconname.extension
+ sprintf(file_name, "%s/%s/%s/%s.%s", base_name, theme_name, dir_name, icon_name, extension);
+ if (g_file_test(file_name, G_FILE_TEST_EXISTS)) {
+ if (directory_size_distance((IconThemeDir*)dir->data, size) < minimal_size) {
+ if (best_file_name) {
+ free(best_file_name);
+ best_file_name = NULL;
+ }
+ best_file_name = strdup(file_name);
+ minimal_size = directory_size_distance((IconThemeDir*)dir->data, size);
+ }
+ if (((IconThemeDir*)dir->data)->size >= size && (next_larger_size == -1 || ((IconThemeDir*)dir->data)->size < next_larger_size)) {
+ if (next_larger) {
+ free(next_larger);
+ next_larger = NULL;
+ }
+ next_larger = strdup(file_name);
+ next_larger_size = ((IconThemeDir*)dir->data)->size;
+ }
+ }
+ free(file_name);
+ }
+ }
+ }
+ }
+ if (next_larger) {
+ g_slist_free(basenames);
+ g_slist_free(extensions);
+ free(best_file_name);
+ return next_larger;
+ }
+ if (best_file_name) {
+ g_slist_free(basenames);
+ g_slist_free(extensions);
+ return best_file_name;
+ }
+
+ // Stage 3: look in unthemed icons
+ {
+ GSList *base;
+ for (base = basenames; base; base = g_slist_next(base)) {
+ GSList *ext;
+ for (ext = extensions; ext; ext = g_slist_next(ext)) {
+ char *base_name = (char*) base->data;
+ char *extension = (char*) ext->data;
+ char *file_name = malloc(strlen(base_name) + strlen(icon_name) +
+ strlen(extension) + 100);
+ // filename = directory/iconname.extension
+ sprintf(file_name, "%s/%s.%s", base_name, icon_name, extension);
+ //printf("checking %s\n", file_name);
+ if (g_file_test(file_name, G_FILE_TEST_EXISTS)) {
+ g_slist_free(basenames);
+ g_slist_free(extensions);
+ return file_name;
+ } else {
+ free(file_name);
+ file_name = NULL;
+ }
+ }
+ }
+ }
+
+ fprintf(stderr, "Could not find icon %s\n", icon_name);
+
+ return NULL;
+}