src/launcher/icon-theme-common.c (raw)
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/************************************************************************** * Tint2 : Icon theme 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/icon-theme-spec/ */ #include "icon-theme-common.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include "apps-common.h" #define ICON_DIR_TYPE_SCALABLE 0 #define ICON_DIR_TYPE_FIXED 1 #define ICON_DIR_TYPE_THRESHOLD 2 typedef struct IconThemeDir { char *name; int size; int type; int max_size; int min_size; int threshold; } IconThemeDir; int parse_theme_line(char *line, char **key, char **value) { return parse_dektop_line(line, key, value); } GSList *icon_locations = NULL; // Do not free the result. const GSList *get_icon_locations() { if (icon_locations) return icon_locations; gchar *path; path = g_build_filename(g_get_home_dir(), ".icons", NULL); icon_locations = g_slist_append(icon_locations, g_strdup(path)); g_free(path); path = g_build_filename(g_get_home_dir(), ".local/share/icons", NULL); icon_locations = g_slist_append(icon_locations, g_strdup(path)); g_free(path); icon_locations = g_slist_append(icon_locations, g_strdup("/usr/local/share/icons")); icon_locations = g_slist_append(icon_locations, g_strdup("/usr/local/share/pixmaps")); icon_locations = g_slist_append(icon_locations, g_strdup("/usr/share/icons")); icon_locations = g_slist_append(icon_locations, g_strdup("/usr/share/pixmaps")); icon_locations = g_slist_append(icon_locations, g_strdup("/opt/share/icons")); icon_locations = g_slist_append(icon_locations, g_strdup("/opt/share/pixmaps")); return icon_locations; } IconTheme *make_theme(const char *name) { IconTheme *theme = calloc(1, sizeof(IconTheme)); theme->name = strdup(name); theme->list_inherits = NULL; theme->list_directories = NULL; return theme; } // TODO Use UTF8 when parsing the file IconTheme *load_theme_from_index(const char *file_name, const char *name) { IconTheme *theme; FILE *f; char *line = NULL; size_t line_size; if ((f = fopen(file_name, "rt")) == NULL) { fprintf(stderr, "Could not open theme '%s'\n", file_name); return NULL; } theme = make_theme(name); IconThemeDir *current_dir = NULL; int inside_header = 1; while (getline(&line, &line_size, f) >= 0) { 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; } } } } 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); free(line); return theme; } void load_theme_from_fs_dir(IconTheme *theme, const char *dir_name) { gchar *file_name = g_build_filename(dir_name, "index.theme", NULL); if (g_file_test(file_name, G_FILE_TEST_EXISTS)) { g_free(file_name); return; } GDir *d = g_dir_open(dir_name, 0, NULL); if (d) { const gchar *size_name; while ((size_name = g_dir_read_name(d))) { gchar *full_size_name = g_build_filename(dir_name, size_name, NULL); if (g_file_test(file_name, G_FILE_TEST_IS_DIR)) { int size, size2; if ((sscanf(size_name, "%dx%d", &size, &size2) == 2 && size == size2) || (sscanf(size_name, "%d", &size) == 1)) { GDir *dSize = g_dir_open(full_size_name, 0, NULL); if (dSize) { const gchar *subdir_name; while ((subdir_name = g_dir_read_name(dSize))) { IconThemeDir *dir = calloc(1, sizeof(IconThemeDir)); // value is like 48x48/apps gchar *value = g_build_filename(size_name, subdir_name, NULL); dir->name = strdup(value); g_free(value); dir->max_size = dir->min_size = dir->size = size; dir->type = ICON_DIR_TYPE_FIXED; theme->list_directories = g_slist_append(theme->list_directories, dir); } g_dir_close(dSize); } } } g_free(full_size_name); } g_dir_close(d); } } IconTheme *load_theme_from_fs(const char *name, IconTheme *theme) { gchar *dir_name = NULL; for (const GSList *location = get_icon_locations(); location; location = g_slist_next(location)) { gchar *path = (gchar *)location->data; dir_name = g_build_filename(path, name, NULL); if (g_file_test(dir_name, G_FILE_TEST_IS_DIR)) { if (!theme) { theme = make_theme(name); } load_theme_from_fs_dir(theme, dir_name); } g_free(dir_name); dir_name = NULL; } return theme; } IconTheme *load_theme(const 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* if (name == NULL) return NULL; gchar *file_name = NULL; for (const GSList *location = get_icon_locations(); location; location = g_slist_next(location)) { gchar *path = (gchar *)location->data; file_name = g_build_filename(path, name, "index.theme", NULL); if (!g_file_test(file_name, G_FILE_TEST_EXISTS)) { g_free(file_name); file_name = NULL; } if (file_name) break; } IconTheme *theme = NULL; if (file_name) { theme = load_theme_from_index(file_name, name); g_free(file_name); } return load_theme_from_fs(name, theme); } void free_icon_theme(IconTheme *theme) { if (!theme) return; free(theme->name); theme->name = NULL; for (GSList *l_inherits = theme->list_inherits; l_inherits; l_inherits = l_inherits->next) { free(l_inherits->data); } g_slist_free(theme->list_inherits); theme->list_inherits = NULL; for (GSList *l_dir = theme->list_directories; l_dir; l_dir = l_dir->next) { IconThemeDir *dir = (IconThemeDir *)l_dir->data; free(dir->name); free(l_dir->data); } g_slist_free(theme->list_directories); theme->list_directories = NULL; } void free_themes(IconThemeWrapper *themes) { if (!themes) return; for (GSList *l = themes->themes; l; l = l->next) { IconTheme *theme = (IconTheme *)l->data; free_icon_theme(theme); free(theme); } g_slist_free(themes->themes); for (GSList *l = themes->themes_fallback; l; l = l->next) { IconTheme *theme = (IconTheme *)l->data; free_icon_theme(theme); free(theme); } g_slist_free(themes->themes_fallback); free(themes); } 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\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" : "?????"); item = g_slist_next(item); } fprintf(stdout, "\033[0m"); } gboolean str_list_contains(const GSList *list, const char *value) { const GSList *item = list; while (item != NULL) { if (g_str_equal(item->data, value)) { return TRUE; } item = g_slist_next(item); } return FALSE; } void load_themes_helper(const char *name, GSList **themes, GSList **queued) { if (str_list_contains(*queued, name)) return; GSList *queue = g_slist_append(NULL, strdup(name)); *queued = g_slist_append(*queued, strdup(name)); // Load wrapper->themes while (queue) { char *queued_name = queue->data; queue = g_slist_remove(queue, queued_name); fprintf(stderr, " '%s',", queued_name); IconTheme *theme = load_theme(queued_name); if (theme != NULL) { *themes = g_slist_append(*themes, theme); GSList *item = theme->list_inherits; int pos = 0; while (item != NULL) { char *parent = item->data; if (!str_list_contains(*queued, parent)) { queue = g_slist_insert(queue, strdup(parent), pos); pos++; *queued = g_slist_append(*queued, strdup(parent)); } item = g_slist_next(item); } } free(queued_name); } fprintf(stderr, "\n"); // Free the queue GSList *l; for (l = queue; l; l = l->next) free(l->data); g_slist_free(queue); } IconThemeWrapper *load_themes(const char *icon_theme_name) { IconThemeWrapper *wrapper = calloc(1, sizeof(IconThemeWrapper)); if (!icon_theme_name) { fprintf(stderr, "Missing icon_theme_name theme, default to 'hicolor'.\n"); icon_theme_name = "hicolor"; } else { fprintf(stderr, "Loading %s. Icon theme :", icon_theme_name); } GSList *queued = NULL; load_themes_helper(icon_theme_name, &wrapper->themes, &queued); load_themes_helper("hicolor", &wrapper->themes, &queued); // Load wrapper->themes_fallback const GSList *location; for (location = get_icon_locations(); location; location = g_slist_next(location)) { gchar *path = (gchar *)location->data; GDir *d = g_dir_open(path, 0, NULL); if (d) { const gchar *name; while ((name = g_dir_read_name(d))) { gchar *file_name = g_build_filename(path, name, "index.theme", NULL); if (g_file_test(file_name, G_FILE_TEST_EXISTS) && !g_file_test(file_name, G_FILE_TEST_IS_DIR)) { load_themes_helper(name, &wrapper->themes_fallback, &queued); } g_free(file_name); } g_dir_close(d); } } // Free the queued list GSList *l; for (l = queued; l; l = l->next) free(l->data); g_slist_free(queued); return wrapper; } 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; } } } gint compare_theme_directories(gconstpointer a, gconstpointer b, gpointer size_query) { int size = GPOINTER_TO_INT(size_query); const IconThemeDir *da = (const IconThemeDir *)a; const IconThemeDir *db = (const IconThemeDir *)b; return abs(da->size - size) - abs(db->size - size); } #define DEBUG_ICON_SEARCH 0 char *get_icon_path_helper(GSList *themes, 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; } const GSList *basenames = get_icon_locations(); GSList *extensions = NULL; extensions = g_slist_append(extensions, ".png"); extensions = g_slist_append(extensions, ".xpm"); #ifdef HAVE_RSVG extensions = g_slist_append(extensions, ".svg"); #endif // if the icon name already contains one of the extensions (e.g. vlc.png instead of vlc) add a special entry for (GSList *ext = extensions; ext; ext = g_slist_next(ext)) { char *extension = (char *)ext->data; if (strlen(icon_name) > strlen(extension) && strcmp(extension, icon_name + strlen(icon_name) - strlen(extension)) == 0) { extensions = g_slist_append(extensions, ""); break; } } GSList *theme; // 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 // These 3 variables are used for keeping the closest size match int minimal_size = INT_MAX; char *best_file_name = NULL; GSList *best_file_theme = NULL; // These 3 variables are used for keeping the next larger match int next_larger_size = -1; char *next_larger = NULL; GSList *next_larger_theme = NULL; int file_name_size = 4096; char *file_name = calloc(file_name_size, 1); for (theme = themes; theme; theme = g_slist_next(theme)) { ((IconTheme *)theme->data)->list_directories = g_slist_sort_with_data(((IconTheme *)theme->data)->list_directories, compare_theme_directories, GINT_TO_POINTER(size)); GSList *dir; for (dir = ((IconTheme *)theme->data)->list_directories; dir; dir = g_slist_next(dir)) { // Closest match gboolean possible = directory_size_distance((IconThemeDir *)dir->data, size) < minimal_size && (!best_file_theme ? TRUE : theme == best_file_theme); // Next larger match possible = possible || (((IconThemeDir *)dir->data)->size >= size && (next_larger_size == -1 || ((IconThemeDir *)dir->data)->size < next_larger_size) && (!next_larger_theme ? 1 : theme == next_larger_theme)); if (!possible) continue; const GSList *base; for (base = basenames; base; base = g_slist_next(base)) { for (GSList *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; if (strlen(base_name) + strlen(theme_name) + strlen(dir_name) + strlen(icon_name) + strlen(extension) + 100 > file_name_size) { file_name_size = strlen(base_name) + strlen(theme_name) + strlen(dir_name) + strlen(icon_name) + strlen(extension) + 100; file_name = realloc(file_name, file_name_size); } file_name[0] = 0; // filename = directory/$(themename)/subdirectory/iconname.extension sprintf(file_name, "%s/%s/%s/%s%s", base_name, theme_name, dir_name, icon_name, extension); if (DEBUG_ICON_SEARCH) printf("checking %s\n", file_name); if (g_file_test(file_name, G_FILE_TEST_EXISTS)) { if (DEBUG_ICON_SEARCH) printf("found: %s\n", file_name); // Closest match if (directory_size_distance((IconThemeDir *)dir->data, size) < minimal_size && (!best_file_theme ? 1 : theme == best_file_theme)) { 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); best_file_theme = theme; if (DEBUG_ICON_SEARCH) printf("best_file_name = %s; minimal_size = %d\n", best_file_name, minimal_size); } // Next larger match if (((IconThemeDir *)dir->data)->size >= size && (next_larger_size == -1 || ((IconThemeDir *)dir->data)->size < next_larger_size) && (!next_larger_theme ? 1 : theme == next_larger_theme)) { if (next_larger) { free(next_larger); next_larger = NULL; } next_larger = strdup(file_name); next_larger_size = ((IconThemeDir *)dir->data)->size; next_larger_theme = theme; if (DEBUG_ICON_SEARCH) printf("next_larger = %s; next_larger_size = %d\n", next_larger, next_larger_size); } } } } } } free(file_name); file_name = NULL; if (next_larger) { g_slist_free(extensions); free(best_file_name); return next_larger; } if (best_file_name) { g_slist_free(extensions); return best_file_name; } // Look in unthemed icons { for (const GSList *base = basenames; base; base = g_slist_next(base)) { for (GSList *ext = extensions; ext; ext = g_slist_next(ext)) { char *base_name = (char *)base->data; char *extension = (char *)ext->data; file_name = calloc(strlen(base_name) + strlen(icon_name) + strlen(extension) + 100, 1); // filename = directory/iconname.extension sprintf(file_name, "%s/%s%s", base_name, icon_name, extension); if (DEBUG_ICON_SEARCH) printf("checking %s\n", file_name); if (g_file_test(file_name, G_FILE_TEST_EXISTS)) { g_slist_free(extensions); return file_name; } else { free(file_name); file_name = NULL; } } } } g_slist_free(extensions); return NULL; } char *get_icon_path(IconThemeWrapper *theme, const char *icon_name, int size) { if (!theme) return NULL; icon_name = icon_name ? icon_name : DEFAULT_ICON; char *path = get_icon_path_helper(theme->themes, icon_name, size); if (!path) { path = get_icon_path_helper(theme->themes_fallback, icon_name, size); } if (!path) { fprintf(stderr, "Could not find icon %s\n", icon_name); path = get_icon_path_helper(theme->themes, DEFAULT_ICON, size); } if (!path) { path = get_icon_path_helper(theme->themes_fallback, DEFAULT_ICON, size); } return path; } |