mirror of
https://github.com/swaywm/sway.git
synced 2024-08-20 01:03:00 +00:00
541 lines
14 KiB
C
541 lines
14 KiB
C
#define _POSIX_C_SOURCE 200809L
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#include <ctype.h>
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#include <dirent.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <wordexp.h>
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#include "swaybar/tray/icon.h"
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#include "config.h"
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#include "list.h"
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#include "log.h"
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#include "stringop.h"
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static int cmp_id(const void *item, const void *cmp_to) {
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return strcmp(item, cmp_to);
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}
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static bool dir_exists(char *path) {
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struct stat sb;
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return stat(path, &sb) == 0 && S_ISDIR(sb.st_mode);
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}
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static list_t *get_basedirs(void) {
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list_t *basedirs = create_list();
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list_add(basedirs, strdup("$HOME/.icons")); // deprecated
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char *data_home = getenv("XDG_DATA_HOME");
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list_add(basedirs, strdup(data_home && *data_home ?
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"$XDG_DATA_HOME/icons" : "$HOME/.local/share/icons"));
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list_add(basedirs, strdup("/usr/share/pixmaps"));
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char *data_dirs = getenv("XDG_DATA_DIRS");
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if (!(data_dirs && *data_dirs)) {
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data_dirs = "/usr/local/share:/usr/share";
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}
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data_dirs = strdup(data_dirs);
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char *dir = strtok(data_dirs, ":");
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do {
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size_t path_len = snprintf(NULL, 0, "%s/icons", dir) + 1;
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char *path = malloc(path_len);
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snprintf(path, path_len, "%s/icons", dir);
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list_add(basedirs, path);
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} while ((dir = strtok(NULL, ":")));
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free(data_dirs);
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list_t *basedirs_expanded = create_list();
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for (int i = 0; i < basedirs->length; ++i) {
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wordexp_t p;
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if (wordexp(basedirs->items[i], &p, WRDE_UNDEF) == 0) {
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if (dir_exists(p.we_wordv[0])) {
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list_add(basedirs_expanded, strdup(p.we_wordv[0]));
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}
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wordfree(&p);
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}
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}
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list_free_items_and_destroy(basedirs);
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return basedirs_expanded;
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}
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static void destroy_theme(struct icon_theme *theme) {
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if (!theme) {
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return;
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}
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free(theme->name);
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free(theme->comment);
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list_free_items_and_destroy(theme->inherits);
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list_free_items_and_destroy(theme->directories);
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free(theme->dir);
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for (int i = 0; i < theme->subdirs->length; ++i) {
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struct icon_theme_subdir *subdir = theme->subdirs->items[i];
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free(subdir->name);
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free(subdir);
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}
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list_free(theme->subdirs);
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free(theme);
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}
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static const char *group_handler(char *old_group, char *new_group,
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struct icon_theme *theme) {
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if (!old_group) {
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return new_group && strcmp(new_group, "Icon Theme") == 0 ? NULL :
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"first group must be 'Icon Theme'";
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}
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if (strcmp(old_group, "Icon Theme") == 0) {
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if (!theme->name) {
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return "missing required key 'Name'";
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} else if (!theme->comment) {
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return "missing required key 'Comment'";
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} else if (!theme->directories) {
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return "missing required key 'Directories'";
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} else {
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for (char *c = theme->name; *c; ++c) {
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if (*c == ',' || *c == ' ') {
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return "malformed theme name";
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}
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}
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}
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} else {
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if (theme->subdirs->length == 0) { // skip
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return NULL;
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}
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struct icon_theme_subdir *subdir =
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theme->subdirs->items[theme->subdirs->length - 1];
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if (!subdir->size) {
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return "missing required key 'Size'";
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}
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switch (subdir->type) {
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case FIXED: subdir->max_size = subdir->min_size = subdir->size;
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break;
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case SCALABLE: {
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if (!subdir->max_size) subdir->max_size = subdir->size;
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if (!subdir->min_size) subdir->min_size = subdir->size;
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break;
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}
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case THRESHOLD:
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subdir->max_size = subdir->size + subdir->threshold;
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subdir->min_size = subdir->size - subdir->threshold;
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}
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}
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if (new_group && list_seq_find(theme->directories, cmp_id, new_group) != -1) {
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struct icon_theme_subdir *subdir = calloc(1, sizeof(struct icon_theme_subdir));
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if (!subdir) {
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return "out of memory";
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}
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subdir->name = strdup(new_group);
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subdir->threshold = 2;
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list_add(theme->subdirs, subdir);
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}
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return NULL;
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}
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static const char *entry_handler(char *group, char *key, char *value,
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struct icon_theme *theme) {
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if (strcmp(group, "Icon Theme") == 0) {
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if (strcmp(key, "Name") == 0) {
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theme->name = strdup(value);
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} else if (strcmp(key, "Comment") == 0) {
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theme->comment = strdup(value);
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} else if (strcmp(key, "Inherits") == 0) {
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theme->inherits = split_string(value, ",");
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} else if (strcmp(key, "Directories") == 0) {
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theme->directories = split_string(value, ",");
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} // Ignored: ScaledDirectories, Hidden, Example
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} else {
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if (theme->subdirs->length == 0) { // skip
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return NULL;
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}
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struct icon_theme_subdir *subdir =
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theme->subdirs->items[theme->subdirs->length - 1];
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if (strcmp(subdir->name, group) != 0) { // skip
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return NULL;
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}
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if (strcmp(key, "Context") == 0) {
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return NULL; // ignored, but explicitly handled to not fail parsing
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} else if (strcmp(key, "Type") == 0) {
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if (strcmp(value, "Fixed") == 0) {
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subdir->type = FIXED;
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} else if (strcmp(value, "Scalable") == 0) {
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subdir->type = SCALABLE;
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} else if (strcmp(value, "Threshold") == 0) {
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subdir->type = THRESHOLD;
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} else {
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return "invalid value - expected 'Fixed', 'Scalable' or 'Threshold'";
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}
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return NULL;
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}
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char *end;
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int n = strtol(value, &end, 10);
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if (*end != '\0') {
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return "invalid value - expected a number";
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}
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if (strcmp(key, "Size") == 0) {
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subdir->size = n;
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} else if (strcmp(key, "MaxSize") == 0) {
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subdir->max_size = n;
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} else if (strcmp(key, "MinSize") == 0) {
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subdir->min_size = n;
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} else if (strcmp(key, "Threshold") == 0) {
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subdir->threshold = n;
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} // Ignored: Scale
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}
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return NULL;
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}
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/*
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* This is a Freedesktop Desktop Entry parser (essentially INI)
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* It calls entry_handler for every entry
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* and group_handler between every group (as well as at both ends)
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* Handlers return whether an error occurred, which stops parsing
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*/
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static struct icon_theme *read_theme_file(char *basedir, char *theme_name) {
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// look for index.theme file
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size_t path_len = snprintf(NULL, 0, "%s/%s/index.theme", basedir,
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theme_name) + 1;
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char *path = malloc(path_len);
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if (!path) {
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return NULL;
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}
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snprintf(path, path_len, "%s/%s/index.theme", basedir, theme_name);
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FILE *theme_file = fopen(path, "r");
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free(path);
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if (!theme_file) {
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return NULL;
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}
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struct icon_theme *theme = calloc(1, sizeof(struct icon_theme));
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if (!theme) {
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fclose(theme_file);
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return NULL;
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}
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theme->subdirs = create_list();
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list_t *groups = create_list();
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const char *error = NULL;
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int line_no = 0;
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char *full_line = NULL;
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size_t full_len = 0;
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ssize_t nread;
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while ((nread = getline(&full_line, &full_len, theme_file)) != -1) {
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++line_no;
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char *line = full_line - 1;
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while (isspace(*++line)) {} // remove leading whitespace
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if (!*line || line[0] == '#') continue; // ignore blank lines & comments
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int len = nread - (line - full_line);
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while (isspace(line[--len])) {}
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line[++len] = '\0'; // remove trailing whitespace
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if (line[0] == '[') { // group header
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// check well-formed
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int i = 1;
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for (; !iscntrl(line[i]) && line[i] != '[' && line[i] != ']'; ++i) {}
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if (i != --len || line[i] != ']') {
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error = "malformed group header";
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break;
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}
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line[len] = '\0';
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// check group is not duplicate
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if (list_seq_find(groups, cmp_id, &line[1]) != -1) {
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error = "duplicate group";
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break;
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}
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// call handler
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char *last_group = groups->length > 0 ? groups->items[groups->length - 1] : NULL;
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error = group_handler(last_group, &line[1], theme);
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if (error) {
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break;
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}
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list_add(groups, strdup(&line[1]));
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} else { // key-value pair
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if (groups->length == 0) {
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error = "unexpected content before first header";
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break;
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}
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// check well-formed
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int eok = 0;
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for (; isalnum(line[eok]) || line[eok] == '-'; ++eok) {} // TODO locale?
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int i = eok - 1;
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while (isspace(line[++i])) {}
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if (line[i] != '=') {
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error = "malformed key-value pair";
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break;
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}
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line[eok] = '\0'; // split into key-value pair
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char *value = &line[i];
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while (isspace(*++value)) {}
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// TODO unescape value
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error = entry_handler(groups->items[groups->length - 1], line,
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value, theme);
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if (error) {
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break;
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}
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}
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}
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if (!error) {
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if (groups->length > 0) {
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error = group_handler(groups->items[groups->length - 1], NULL, theme);
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} else {
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error = "empty file";
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}
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}
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if (!error) {
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theme->dir = strdup(theme_name);
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} else {
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char *last_group = groups->length > 0 ? groups->items[groups->length-1] : "n/a";
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sway_log(SWAY_DEBUG, "Failed to load theme '%s' - parsing of file "
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"'%s/%s/index.theme' failed on line %d (group '%s'): %s",
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theme_name, basedir, theme_name, line_no, last_group, error);
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destroy_theme(theme);
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theme = NULL;
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}
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free(full_line);
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list_free_items_and_destroy(groups);
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fclose(theme_file);
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return theme;
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}
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static list_t *load_themes_in_dir(char *basedir) {
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DIR *dir;
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if (!(dir = opendir(basedir))) {
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return NULL;
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}
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list_t *themes = create_list();
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struct dirent *entry;
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while ((entry = readdir(dir))) {
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if (entry->d_name[0] == '.') continue;
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struct icon_theme *theme = read_theme_file(basedir, entry->d_name);
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if (theme) {
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list_add(themes, theme);
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}
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}
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closedir(dir);
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return themes;
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}
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static void log_loaded_themes(list_t *themes) {
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if (themes->length == 0) {
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sway_log(SWAY_INFO, "Warning: no icon themes loaded");
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return;
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}
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const char sep[] = ", ";
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size_t sep_len = strlen(sep);
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size_t len = 0;
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for (int i = 0; i < themes->length; ++i) {
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struct icon_theme *theme = themes->items[i];
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len += strlen(theme->name) + sep_len;
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}
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char *str = malloc(len + 1);
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if (!str) {
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return;
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}
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char *p = str;
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for (int i = 0; i < themes->length; ++i) {
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if (i > 0) {
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memcpy(p, sep, sep_len);
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p += sep_len;
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}
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struct icon_theme *theme = themes->items[i];
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size_t name_len = strlen(theme->name);
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memcpy(p, theme->name, name_len);
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p += name_len;
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}
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*p = '\0';
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sway_log(SWAY_DEBUG, "Loaded icon themes: %s", str);
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free(str);
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}
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void init_themes(list_t **themes, list_t **basedirs) {
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*basedirs = get_basedirs();
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*themes = create_list();
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for (int i = 0; i < (*basedirs)->length; ++i) {
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list_t *dir_themes = load_themes_in_dir((*basedirs)->items[i]);
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if (dir_themes == NULL) {
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continue;
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}
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list_cat(*themes, dir_themes);
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list_free(dir_themes);
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}
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log_loaded_themes(*themes);
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}
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void finish_themes(list_t *themes, list_t *basedirs) {
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for (int i = 0; i < themes->length; ++i) {
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destroy_theme(themes->items[i]);
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}
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list_free(themes);
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list_free_items_and_destroy(basedirs);
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}
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static char *find_icon_in_subdir(char *name, char *basedir, char *theme,
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char *subdir) {
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static const char *extensions[] = {
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#if HAVE_GDK_PIXBUF
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"svg",
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#endif
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"png",
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#if HAVE_GDK_PIXBUF
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"xpm" // deprecated
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#endif
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};
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size_t path_len = snprintf(NULL, 0, "%s/%s/%s/%s.EXT", basedir, theme,
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subdir, name) + 1;
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char *path = malloc(path_len);
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for (size_t i = 0; i < sizeof(extensions) / sizeof(*extensions); ++i) {
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snprintf(path, path_len, "%s/%s/%s/%s.%s", basedir, theme, subdir,
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name, extensions[i]);
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if (access(path, R_OK) == 0) {
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return path;
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}
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}
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free(path);
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return NULL;
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}
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static bool theme_exists_in_basedir(char *theme, char *basedir) {
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size_t path_len = snprintf(NULL, 0, "%s/%s", basedir, theme) + 1;
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char *path = malloc(path_len);
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snprintf(path, path_len, "%s/%s", basedir, theme);
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bool ret = dir_exists(path);
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free(path);
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return ret;
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}
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static char *find_icon_with_theme(list_t *basedirs, list_t *themes, char *name,
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int size, char *theme_name, int *min_size, int *max_size) {
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struct icon_theme *theme = NULL;
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for (int i = 0; i < themes->length; ++i) {
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theme = themes->items[i];
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if (strcmp(theme->name, theme_name) == 0) {
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break;
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}
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theme = NULL;
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}
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if (!theme) return NULL;
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char *icon = NULL;
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for (int i = 0; i < basedirs->length; ++i) {
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if (!theme_exists_in_basedir(theme->dir, basedirs->items[i])) {
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continue;
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}
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// search backwards to hopefully hit scalable/larger icons first
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for (int j = theme->subdirs->length - 1; j >= 0; --j) {
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struct icon_theme_subdir *subdir = theme->subdirs->items[j];
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if (size >= subdir->min_size && size <= subdir->max_size) {
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if ((icon = find_icon_in_subdir(name, basedirs->items[i],
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theme->dir, subdir->name))) {
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*min_size = subdir->min_size;
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*max_size = subdir->max_size;
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return icon;
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}
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}
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}
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}
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// inexact match
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unsigned smallest_error = -1; // UINT_MAX
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for (int i = 0; i < basedirs->length; ++i) {
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if (!theme_exists_in_basedir(theme->dir, basedirs->items[i])) {
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continue;
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}
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for (int j = theme->subdirs->length - 1; j >= 0; --j) {
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struct icon_theme_subdir *subdir = theme->subdirs->items[j];
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unsigned error = (size > subdir->max_size ? size - subdir->max_size : 0)
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+ (size < subdir->min_size ? subdir->min_size - size : 0);
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if (error < smallest_error) {
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char *test_icon = find_icon_in_subdir(name, basedirs->items[i],
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theme->dir, subdir->name);
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if (test_icon) {
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icon = test_icon;
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smallest_error = error;
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*min_size = subdir->min_size;
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*max_size = subdir->max_size;
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}
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}
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}
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}
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if (!icon && theme->inherits) {
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for (int i = 0; i < theme->inherits->length; ++i) {
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icon = find_icon_with_theme(basedirs, themes, name, size,
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theme->inherits->items[i], min_size, max_size);
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if (icon) {
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break;
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}
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}
|
|
}
|
|
|
|
return icon;
|
|
}
|
|
|
|
static char *find_fallback_icon(list_t *basedirs, char *name, int *min_size,
|
|
int *max_size) {
|
|
for (int i = 0; i < basedirs->length; ++i) {
|
|
char *icon = find_icon_in_subdir(name, basedirs->items[i], "", "");
|
|
if (icon) {
|
|
*min_size = 1;
|
|
*max_size = 512;
|
|
return icon;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
char *find_icon(list_t *themes, list_t *basedirs, char *name, int size,
|
|
char *theme, int *min_size, int *max_size) {
|
|
// TODO https://specifications.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html#implementation_notes
|
|
char *icon = NULL;
|
|
if (theme) {
|
|
icon = find_icon_with_theme(basedirs, themes, name, size, theme,
|
|
min_size, max_size);
|
|
}
|
|
if (!icon && !(theme && strcmp(theme, "Hicolor") == 0)) {
|
|
icon = find_icon_with_theme(basedirs, themes, name, size, "Hicolor",
|
|
min_size, max_size);
|
|
}
|
|
if (!icon) {
|
|
icon = find_fallback_icon(basedirs, name, min_size, max_size);
|
|
}
|
|
return icon;
|
|
}
|